Vacuum furnace cooling and purifying device

Abstract

This utility model discloses a vacuum furnace cooling and purification device, including a cooling tank, a cooler, a wastewater tank, and a vacuum pump. The cooler is disposed inside the cooling tank. The top sidewall of the cooling tank is connected to the vacuum chamber, the bottom sidewall of the cooling tank is connected to the vacuum pump via a first switching valve, and the bottom of the cooling tank is connected to the wastewater tank via a second switching valve. Its advantage is that this utility model provides a vacuum furnace cooling and purification device installed inside a vacuum furnace. The cooling tank is positioned before the vacuum pump's inlet. When the high-temperature gas in the vacuum chamber flows through the cooling tank, the flux volatiles in the high-temperature gas rapidly condense into liquefied substances upon encountering the cooler within the vacuum chamber. These liquefied substances flow into the wastewater tank via the second switching valve, significantly reducing contaminants entering the vacuum pump, greatly extending the vacuum pump's lifespan, and reducing malfunctions and downtime.

Description

Technical Field

[0001] This utility model relates to the technical field of SMT vacuum reflow soldering equipment, and in particular to a vacuum furnace cooling and purification device. Background Technology

[0002] In traditional reflow soldering, flux volatiles in the molten solder, gases adsorbed on the substrate or component pads, and gases trapped within the solder itself are difficult to completely escape, forming air bubbles and voids inside the solder joint after cooling. These voids are stress concentration points and weak points within the solder joint. Under stress from temperature cycling, power cycling, or mechanical vibration, cracks can easily appear in the void areas, leading to problems such as solder joint cracking and detachment. Furthermore, voids act as insulation, severely hindering heat transfer, causing device junction temperatures to rise, performance to degrade, and even failure.

[0003] Vacuum reflow soldering is typically used to address voids. In a vacuum environment, gases in the molten solder expand more easily and escape from the solder. Simultaneously, the surface tension of the molten solder decreases, increasing its fluidity and facilitating gas escape and better solder wetting and spreading. However, during high-temperature vacuuming, high-boiling-point solvents and activators in the flux volatilize violently into gaseous states. If these high-temperature gases directly enter the vacuum pump, they will condense into viscous liquids or solid residues inside the pump and pipelines, clogging oil lines, damaging pump valves, and significantly increasing the frequency and cost of vacuum pump maintenance. Therefore, how to cool and purify flux volatiles during vacuuming and reduce contaminants entering the pump is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a vacuum furnace cooling and purification device to address the shortcomings of the existing technology.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0006] A vacuum furnace cooling and purification device includes a cooling tank, a cooler, a wastewater tank, and a vacuum pump; the cooler is disposed inside the cooling tank, the top sidewall of the cooling tank is connected to a vacuum chamber, the bottom sidewall of the cooling tank is connected to the vacuum pump through a first switching valve, and the bottom of the cooling tank is connected to the wastewater tank through a second switching valve.

[0007] A preferred embodiment is that the cooler includes a cold water inlet end, a cold water outlet end, and a cooling section, which is spirally arranged inside the cooling tank. One end of the cooling section is connected to the cold water inlet end, and the other end is connected to the cold water outlet end.

[0008] In a preferred embodiment, the top sidewall of the cooling tank is connected to the vacuum chamber via a first bellows.

[0009] In a preferred embodiment, a vacuum valve is connected between the first switching valve and the vacuum pump, and the vacuum valve is connected to the vacuum pump through a second bellows.

[0010] A preferred embodiment is that a three-way pipe is connected between the bottom side wall of the cooling tank and the first switch valve, and a negative pressure gauge is connected to one outlet of the three-way pipe.

[0011] In a preferred embodiment, one outlet of the tee pipe is connected to the first switching valve via a bend in the pipe.

[0012] In a preferred embodiment, the first switching valve and the second switching valve are both ball valves.

[0013] The vacuum furnace cooling and purification device provided in this embodiment of the present invention has at least the following beneficial effects: The present invention provides a vacuum furnace cooling and purification device, which is installed inside a vacuum furnace. A cooling tank is installed before the air inlet of the vacuum pump. When the high-temperature gas in the vacuum chamber flows through the cooling tank, the flux volatiles in the high-temperature gas rapidly condense into liquefied substances upon encountering the cooler in the vacuum chamber. The liquefied substances flow into the wastewater tank through a second switching valve, significantly reducing the amount of contaminants entering the vacuum pump, greatly extending the life of the vacuum pump, and reducing malfunctions and downtime.

[0014] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention when connected to a vacuum cavity;

[0016] Figure 2 This is an exploded view of this utility model;

[0017] Figure 3 This is a cross-sectional view of the present invention. Figure 1 ;

[0018] Figure 4 This is a cross-sectional view of the present invention. Figure 2 . Detailed Implementation

[0019] To illustrate the ideas and objectives of this application, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," "left," "right," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] like Figures 1 to 4 As shown, a vacuum furnace cooling and purification device includes a cooling tank 1, a cooler 2, a wastewater tank 3, and a vacuum pump 4; the cooler 2 is disposed inside the cooling tank 1, the top side wall of the cooling tank 1 is connected to the vacuum chamber 5, the bottom side wall of the cooling tank 1 is connected to the vacuum pump 4 through a first switching valve 6, and the bottom of the cooling tank 1 is connected to the wastewater tank 3 through a second switching valve 7.

[0023] like Figures 1 to 4 As shown, this utility model provides a vacuum furnace cooling and purification device, installed inside a vacuum furnace. A cooling tank 1 is installed before the air inlet of the vacuum pump 4. When the high-temperature gas in the vacuum chamber 5 flows through the cooling tank 1, the flux volatiles in the high-temperature gas encounter the cooler 2 in the vacuum chamber 5 and quickly condense into liquefied substances. The liquefied substances flow into the wastewater tank 3 through the second switching valve 7, significantly reducing the amount of pollutants entering the vacuum pump 4, greatly extending the life of the vacuum pump 4, and reducing malfunctions and downtime.

[0024] like Figures 1 to 4 As shown, the cooler 2 includes a cold water inlet end 8, a cold water outlet end 9, and a cooling section 10. The cooling section 10 is spirally arranged inside the cooling tank body 1. One end of the cooling section 10 is connected to the cold water inlet end 8, and the other end is connected to the cold water outlet end 9.

[0025] like Figures 1 to 4 As shown, the top sidewall of the cooling tank 1 is connected to the vacuum chamber 5 via a first bellows 11.

[0026] like Figures 1 to 4As shown, a vacuum valve 12 is connected between the first switching valve 6 and the vacuum pump 4, and the vacuum valve 12 is connected to the vacuum pump 4 through a second bellows 13.

[0027] like Figures 1 to 4 As shown, the cooling and purification device of this invention is installed inside a vacuum furnace. The vacuum chamber 5 is connected to the top side wall of the cooling tank 1 via a first corrugated pipe 11, and the vacuum valve 12 is connected to the vacuum pump 4 via a second corrugated pipe 13. When the vacuum pump 4 operates, the mixed gas in the vacuum chamber 5 first enters the cooling tank 1 through the first corrugated pipe 11. The cooling tank 1 is equipped with a cooler 2, and cold water enters the cooling section 10 from the cold water inlet 8 and then exits from the cold water outlet 9. The cooling section 10 cools the mixed gas. The mixed gas rapidly condenses and liquefies as it passes through the cooler 2, and the liquefied material flows to the bottom of the cooling tank 1. The second switch valve 7 needs to be opened to collect the liquefied material into the wastewater tank 3 for centralized treatment. Afterward, the purified gas sequentially passes through a three-way pipe 14, a bent pipe 16, the first switch valve 6, and the vacuum valve 12, finally entering the vacuum pump 4 through the second corrugated pipe, thus completing the entire vacuuming process. One outlet of the three-way pipe 14 is connected to a negative pressure gauge 15, which continuously monitors the pressure value inside the cooling tank 1. The first switch valve 6 is manually controlled to open and close, and the vacuum valve 12 is automatically controlled to open and close.

[0028] like Figures 1 to 4 As shown, a three-way pipe 14 is connected between the bottom side wall of the cooling tank 1 and the first switch valve 6, and a negative pressure gauge 15 is connected to one outlet of the three-way pipe 14.

[0029] like Figures 1 to 4 As shown, one outlet of the three-way pipe 14 is connected to the first switching valve 6 via a bend pipe 16.

[0030] like Figures 1 to 4 As shown, the first switching valve 6 and the second switching valve 7 are both ball valves. The cooling and purification device of this invention is installed inside a vacuum furnace. The vacuum chamber 5 is connected to the top side wall of the cooling tank 1 through the first bellows 11, and the vacuum valve 12 is connected to the vacuum pump 4 through the second bellows 13. Figure 3 and Figure 4The middle arrow indicates the gas flow direction. When the vacuum pump 4 is working, the mixed gas in the vacuum chamber 5 enters the cooling tank 1 through the first bellows 11. The cooling tank 1 is equipped with a cooler 2. Cold water enters the cooling section 10 from the cold water inlet 8 and then exits from the cold water outlet 9. The cooling section 10 cools the mixed gas. When the mixed gas passes through the cooler 2, it will quickly condense and liquefy. The liquefied gas will flow to the bottom of the cooling tank 1. The second switch valve 7 needs to be opened to collect the liquefied gas into the wastewater tank 3 for centralized treatment. After that, the purified gas passes through the three-way pipe 14, the elbow pipe 16, the first switch valve 6, and the vacuum valve 12 in sequence, and finally enters the vacuum pump 4 through the two bellows, thus completing the entire vacuuming process. One outlet of the three-way pipe 14 is connected to a negative pressure gauge 15, which continuously monitors the pressure value inside the cooling tank 1. The first switch valve 6 is manually controlled to open and close, and the vacuum valve 12 is automatically controlled to open and close.

[0031] The above are specific embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A vacuum furnace cooling purification apparatus characterized by comprising: It includes a cooling tank, a cooler, a wastewater tank, and a vacuum pump; the cooler is disposed inside the cooling tank, the top side wall of the cooling tank is connected to the vacuum chamber, the bottom side wall of the cooling tank is connected to the vacuum pump through a first switching valve, and the bottom of the cooling tank is connected to the wastewater tank through a second switching valve.

2. The vacuum furnace cooling purification apparatus according to claim 1, characterized by The cooler includes a cold water inlet end, a cold water outlet end, and a cooling section. The cooling section is spirally arranged inside the cooling tank. One end of the cooling section is connected to the cold water inlet end, and the other end is connected to the cold water outlet end.

3. The vacuum furnace cooling purification apparatus according to claim 1, characterized by The top sidewall of the cooling tank is connected to the vacuum chamber via a first bellows.

4. The vacuum furnace cooling purification apparatus according to claim 1, characterized by A vacuum valve is connected between the first switching valve and the vacuum pump, and the vacuum valve is connected to the vacuum pump through a second bellows.

5. The vacuum furnace cooling purification apparatus according to claim 1, wherein A three-way pipe is connected between the bottom side wall of the cooling tank and the first switch valve, and a negative pressure gauge is connected to one outlet of the three-way pipe.

6. The vacuum furnace cooling purification apparatus according to claim 5, wherein One outlet of the tee pipe is connected to the first switch valve via a bend in the pipe.

7. The vacuum furnace cooling purification apparatus according to claim 1, wherein The first switching valve and the second switching valve are both ball valves.

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