Oven pressure control method and system
A pressure control and oven technology, applied in the field of ovens, can solve problems such as instability, excessive boost pressure, waste, etc., and achieve the effects of preventing excessive boost, improving boost efficiency, and saving energy
Pending Publication Date: 2022-04-22
ZHISHENG SCI & TECH GUANGZHOU
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is aimed at the above-mentioned shortcomings of the prior art. The purpose of the present invention is to provide a pressure control method and system for an oven to solve the problem of waste caused by excessive pressurization and pressure instability
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Embodiment Construction
[0029] The present invention will be further described below in conjunction with the specific embodiments in the accompanying drawings.
[0030] refer to Figure 3-5 , an oven pressure control method, comprising:
[0031] Obtain the pressure in the oven in real time;
[0032] When the pressure in the oven is lower than the minimum pressure allowed by the process, the pressure is quickly increased by directly feeding the protective gas, that is, the gas is directly introduced into the oven through the air inlet valve;
[0033] When the pressure in the oven reaches the minimum pressure allowed by the process, stop feeding the protective gas, and maintain the pressure in the oven within the pressure range allowed by the process by heating, that is, to heat the gas in the oven, and use the gas to expand when heated. The property increases the pressure, which can effectively prevent over-pressurization, reduce the waste of protective gas caused by pressure relief through venting ...
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The invention discloses an oven pressure control method, relates to the technical field of ovens, and solves the technical problem of waste caused by excessive pressurization and unstable pressure. The method comprises the steps that the pressure in an oven is obtained in real time; when the pressure in the oven is lower than the lowest pressure allowed by the process, the pressure is rapidly increased by directly introducing protective gas; when the pressure in the oven reaches the lowest pressure allowed by the process, stopping introducing the protective gas, and maintaining the pressure in the oven within the pressure range allowed by the process in a heating manner; and when the pressure in the oven is higher than the pressure range allowed by the process, the on / off action of the pressure release valve is controlled to release the pressure according to a certain proportion in a timing switching manner, so that the pressure in the oven is maintained within the pressure range allowed by the process. The invention further discloses an oven pressure control system. After the pressure reaches the lowest pressure allowed by the process, the gas in the oven is heated, so that the pressure is increased, excessive pressurization can be prevented, and energy is saved.
Description
technical field [0001] The present invention relates to the technical field of ovens, more specifically, it relates to an oven pressure control method and system. Background technique [0002] In the PCB industry, a variety of oven equipment that requires air pressure inside the oven will be used. When this type of oven is used in production, it has high requirements on the internal air pressure of the oven. It needs to be quickly pressurized to the process pressure, and it is hoped that the internal air pressure can reach the set value and maintain a stable state. [0003] The pressure control of existing oven equipment such as figure 1 As shown, the circuit as figure 2 As shown, after starting the oven, open the vent valve to inflate. When the pressure exceeds the set value, close the vent valve and open the vent valve to vent the pressure to the set value. When the pressure drops, continue to inflate. Overboost and pressure instability lead to waste problems. Conten...
Claims
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IPC IPC(8): G05D16/20H05K3/00H05K3/12
CPCG05D16/2026H05K3/00H05K3/1291
Inventor 孔祥逸王正新万金平
Owner ZHISHENG SCI & TECH GUANGZHOU