Control system for electronic product-drying cabinets
A technology for electronic products and control systems, applied in the field of control systems, can solve the problems of IC resin package cracking, reducing product qualification rate, product failure, etc., and achieve the effects of long service life, good drying effect and high working reliability.
Inactive Publication Date: 2015-06-03
XIAN LIANKONG ELECTRICAL
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Problems solved by technology
[0003] The harm of moisture to the semiconductor industry is mainly manifested in the fact that moisture can penetrate into the IC from the pin gap through the IC plastic package, resulting in IC moisture absorption, forming water vapor in the heating process of the SMT process, and the resulting pressure leads to cracking of the IC resin package. And it will oxidize the metal inside the IC, leading to product failure. In addition, when the device is soldered on the PCB board, due to the release of water vapor pressure, it will also lead to false soldering.
[0004] For the glass substrates and polarizers of liquid crystal devices such as liquid crystal displays, although the filter lenses need to be cleaned and dried during the production process, they will still be affected by moisture after dehumidification, reducing the pass rate of the product. After cleaning and drying, it should be stored in a dry environment below 40% RH
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[0020] Such as figure 2 , image 3 with Figure 4 The shown drying cabinet for electronic products includes a cabinet body 1 with a rectangular parallelepiped structure and a plurality of universal wheels 4 arranged at the bottom of the cabinet body 1 for driving the cabinet body 1 to move. The cabinet body 1 is hinged with multiple Outer door 3, a plurality of said outer doors 3 are arranged along the height direction of the cabinet body 1, a plurality of said outer doors 3 are side-hung type doors, and a plurality of said outer doors 3 are provided with handles 2, said The outer door 3 is a glass door; a plurality of inner doors 6 are arranged in the cabinet body 1 and correspond to a plurality of the outer doors 3 one by one, and the inner doors 6 are arranged in the cabinet body 1 one by one. The corresponding inner side is provided with a plurality of push-pull drawers 5, the structure and size of the plurality of push-pull drawers 5 are equal, the side wall of the cab...
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The invention discloses a control system for electronic product-drying cabinets, which comprises a temperature sensor for detecting the internal temperature of a drawer, a first humidity sensor for detecting the internal humidity of the drawer, a second humidity sensor for detecting the humidity of desiccant and a controller for receiving the output signals of the temperature sensor, the first humidity sensor and the second humidity sensor, the temperature sensor, the first humidity sensor and the second humidity sensor are connected with the input ends of the controller, the output end of the controller is connected with a relay, the relay is connected with a power supply and a heater, the output ends of the controller are connected with a first electromagnetic valve for controlling oil supply into the rod cavity or rodless cavity of a telescopic hydraulic cylinder and a second electromagnetic valve for controlling air supply into the rod cavity or rodless cavity of a telescopic air cylinder, and the output end of the controller is also connected with a display screen for displaying temperature value and humidity value. The control system effectively increases the automation of an electronic product-drying cabinet.
Description
technical field [0001] The invention relates to a control system, in particular to a control system for an electronic product drying cabinet. Background technique [0002] At present, most electronic products are required to be operated and stored under dry conditions. According to statistics, more than 1 / 4 of the industrial defective products in the world are related to the hazards of moisture. For the electronics industry, the hazards of moisture have become a factor that affects product quality. one of the main factors. [0003] The harm of moisture to the semiconductor industry is mainly manifested in the fact that moisture can penetrate into the IC from the pin gap through the IC plastic package, resulting in IC moisture absorption, forming water vapor in the heating process of the SMT process, and the resulting pressure leads to cracking of the IC resin package. And it will oxidize the metal inside the IC, leading to product failure. In addition, when the device is so...
Claims
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IPC IPC(8): G05B19/04
CPCG05D27/02
Inventor 卫荣平
Owner XIAN LIANKONG ELECTRICAL