Reflow furnace

Patent metadata

Field	Value
Publication number	US-12013185-B2
Application number	US-202017115435-A
Country	US
Kind code	B2
Filing date	Dec 8, 2020
Priority date	Dec 12, 2019
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

The present disclosure discloses a reflow oven, comprising a heating zone, a cooling zone, a barrier and exhaust zone, a gas exhaust passage, a gas exhaust power device, and a detection device. The heating zone comprises a heating zone inlet and a heating zone outlet. The cooling zone comprises a cooling zone inlet and a cooling zone outlet. The barrier and exhaust zone is located between the heating zone outlet and the cooling zone inlet. An inlet of the gas exhaust passage is communicated with the barrier and exhaust zone. The gas exhaust power device is disposed on the gas exhaust passage. The detection device is disposed on the gas exhaust passage and used for detecting parameters of gas in the gas exhaust passage, wherein the parameters of the gas reflect a blockage condition of the gas exhaust power device. The reflow oven according to the present disclosure can ensure that the gas containing soldering flux is sufficiently drawn out from the barrier and exhaust zone, thereby ensuring the production quality of a circuit board and improving the qualified rate of the circuit board.

First claim

The invention claimed is:

1. A reflow oven, wherein the reflow oven comprises:
a heating zone comprising a heating zone inlet and a heating zone outlet;
a cooling zone comprising a cooling zone inlet and a cooling zone outlet;
a barrier and exhaust zone located between the heating zone outlet and the cooling zone inlet;
a gas exhaust passage, wherein an inlet of the gas exhaust passage is in communication with the barrier and exhaust zone, wherein the gas exhaust passage comprises a first gas exhaust passage and a second gas exhaust passage;
a gas exhaust power device disposed on the gas exhaust passage between the first gas exhaust passage and the second gas exhaust passage;
a detection device disposed on the first gas exhaust passage and used for detecting parameters of gas in the gas exhaust passage, wherein the parameters of the gas reflect a blockage condition of the gas exhaust power device; and
a heating device configured to heat the gas exhaust power device in response to the parameters of the gas reflecting the blockage condition.

2. The reflow oven of claim 1 , further comprising:
a control device communicatively connected with the detection device, wherein the detection device is configured to output a detection signal to the control device when the parameters of the gas meet a threshold value.

3. The reflow oven of claim 2 , wherein the control device is communicatively connected with the gas exhaust power device, and the control device is configured to control the gas exhaust power device to turn on and turn off.

4. The reflow oven of claim 2 , further comprising:
an audio or visual alarm device communicatively connected with the control device, the control device being configured to control the audio or visual alarm device to send audio or visual information based on the received detection signal sent by the detection device.

5. The reflow oven of claim 1 , further comprising a control device communicatively connected with the heating device, wherein the control device is configured to control the heating device to turn on and turn off based on a detection signal provided by the detection device.

6. The reflow oven of claim 1 , wherein the heating device comprises an electric heating wire, and the electric heating wire is arranged around the gas exhaust power device.

7. The reflow oven of claim 1 , wherein the detection device comprises a flow detection device for detecting quantity of flow of the gas in the gas exhaust passage.

8. The reflow oven of claim 1 , wherein the detection device comprises a pressure detection device for detecting pressure of the gas in the gas exhaust passage.

9. The reflow oven of claim 1 , wherein the gas exhaust power device comprises a vacuum generator, a fan or a pump.

10. The reflow oven of claim 1 , wherein the detection device is further configured to detect a pressure of gas in the gas exhaust passage, wherein when the pressure of the gas is below a threshold, the heating device is turned on and when the pressure of the gas is above the threshold, the heating device is turned off.

Assignees

• Illinois Tool Works

Inventors

• Wang Yuwei
• Chen Yuexin

Classifications

• H05K3/34

  by soldering · CPC title

• B23K3/08

  Auxiliary devices therefor · CPC title

• B23K3/00 Primary

  Tools, devices or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods · CPC title

• H05K3/3494

  Heating processes for reflow soldering · CPC title

• F27B2009/126

  involving the circulation of cooling gases, e.g. air · CPC title