知搜-全球专利检索

  1. 登录
  2. 注册
发明授权
CN107003169B 液面检测电路、液位计、含有液位计的容器以及使用该容器的气化器 有权

液面检测电路、液位计、含有液位计的容器以及使用该容器的气化器
摘要：
本发明涉及的液位计(30)具备第一测温电阻元件(R11)；配置在第一测温电阻元件的附近的第一温度测定元件(R12)；根据第一测温电阻元件及第一温度测定元件的温度检测液面的位置的液面检测部(39)，检测第一测温电阻元件及第一温度测定元件的温度的温度检测部(37)，按照温度检测部检测到的第一测温电阻元件的温度与第一温度测定元件的温度的差成为第一定值的方式，决定施加到第一测温电阻元件的电流值的电流控制部(38)；和将所决定的电流值的电流施加到第一测温电阻元件的电源部(32)，液面检测部使用施加到第一测温电阻元件的电流值，判定第一测温电阻元件存在于液体中还是存在于液体外。由此，能够不受周围温度的影响地进行液面检测，由于按固定温度差进行温度控制，所以不会对测温电阻元件施加必要以上的电力，能够实现长寿命化。
摘要（英）：

A liquid level meter includes a first resistive temperature detector; a first temperature measuring body a liquid level detection section a temperature detection section detecting the temperatures of the first resistive temperature detector and the first temperature measuring body; a current control section determining a value of a current to apply to the first resistive temperature detector such that a difference between the temperatures of the first resistive temperature detector and the first temperature measuring body detected by the temperature detection section to be a first constant value; and a power supply unit supplying a current of the determined current value to the first resistive temperature detector; wherein the liquid level detection section determines whether the first resistive temperature detector is present in a liquid or outside of the liquid using the value of the current applied to the first resistive temperature detector.

公开/授权文献
0/0