A fluid chemical raw material heating control device, which is composed of two kinds of liquid tank fluid chemical raw materials are respectively injected into the two sides of the metal heating box in the middle of the heating box is inserted into the heating tube, the temperature of the liquid material is the circuit to control the heating pipe work to achieve the. The constant current source is used in the circuit control, and the constant current is supplied by the constant current source through the temperature sensitive device without changing the external conditions. A voltage controlled by the temperature change is generated by the circuit. In this way, the control signal is accurate, the liquid heating temperature is stable, the product, equipment and equipment packaging, air conditioning, refrigeration, roof insulation and sound insulation, such as liquid foam effect is best. At the same time, the raw materials and energy are saved, the cost is reduced, and the economic benefit is improved. The utility model has the advantages of air temperature compensation and digital display, and provides convenience for operators.
【技术实现步骤摘要】
推荐的技术属于流体化学原料加热装置,产品在现代包装及建筑工程、冷库、冰箱、车辆等保温、隔热、隔音工艺中,现发展到用两种流体化学原料经加热后,混合一体,用喷涂或灌注的方法,使化学原料发泡成型,来达到上述的目的。在以往的控温装置中,一般是用一个电桥电路来实现的。桥路两臂的信号送入比较器进行比较。当桥路两臂不平衡时,比较器有输出,使加热器加热。当桥路两臂平衡时,比较器无输出,加热器停止加热。上述控温装置的缺点,控制温度精度低,稳定性差。这是和桥路元件、放大器有关,在改变桥路两臂的比例时,操作人员改变桥路一臂的电位器来实现的,这样要准确地控制发泡温度,较为困难。推荐的技术,是改变以往的电路设计原理,不采用电桥电路,还是采用恒流源电路,使恒流源的固定电流流过温度敏感器件,在敏感器件上产生一个随温度变化的电压,从而达到控制温度的目的。从技术加热控制电路方块附图说明图1表明,其图号代表是1为恒流源,10是温度敏感器件,3是参考源,4是和放大器,5是A/D变换器,6是温度数字显示器,7开关驱动器;8直流电源,11是加热管,14是加热器电源控制开关。交流电压电源线9和12,交 ...
【技术保护点】
一种流体化学原料加热装置,它是已有的恒流源和放大器、A/D变换器、温度显示器顺序电串连接,并显示液料需要加温的温度。电源开关控制信号是由放大器输出提供,经开关驱动电路送至开关控制端,使加热器工作或停止工作,实现温度控制,其特征是恒流,它是由稳压管D、电阻R1、R2、R3和放大器FC54C组成,或采用恒流管构成,整个加热装置包括交、直流电源、加热管、加热器箱、温度敏感器件、恒流源、参考源、放大器、A/D变换器、温度数字显示器、电源控制开关。
【技术特征摘要】
【专利技术属性】
技术研发人员:李琦丰,
申请(专利权)人:北京市电子工艺技术研究中心,
类型:实用新型
国别省市:11[中国|北京]
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