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A complete English edition of this article has not been published. The complete available Chinese version is shown below.

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Measuring principles4 min readContent language: ChineseUpdated 23 October 2026

温度与湿度:墙内漏风怎样改变壁挂读数?

负压房间可经穿线孔吸入墙腔空气,探头读到的是混合气而非房间代表空气。

具体问题的回答

负压房间可经穿线孔吸入墙腔空气,探头读到的是混合气而非房间代表空气。

安装孔泄漏或探头未充分进入风管,可能混入室内空气而改变局部测量状态。

成立条件与容易混淆的量

核对风管温湿度、压力和探头插入长度,确认密封及耐受条件。

相对湿度表示水汽分压与该温度下饱和水汽压之比,温度变化本身就会改变相对湿度。温湿度探头测量的是其敏感部件附近的空气状态,电子器件发热、壁面温差、太阳辐射和通风不足都可能使它与目标空间不同。湿度和温度两个通道需要同时评价。

针对性核查与判据

按图纸检查插入和密封,避免在可见结露或强梯度点测量。

  • 比较墙孔附近气流与独立房间点,保存对应型号、设置和原始状态,不只记录最终显示值。
  • 风机启停后异常跳变,先查外界空气漏入与局部温差,再查电气干扰。
  • 保留安装尺寸和密封记录,在典型风机状态下验收。
  • 围绕“开排风后壁挂温度骤降而室中央稳定”保留前后变化;用“负压房间可经穿线孔吸入墙腔空气,探头读到的是混合气而非房间代表空气”检验原因,若独立参考不支持该关系则继续排查。

假设案例与原因区分

假设现场出现以下情形:开排风后壁挂温度骤降而室中央稳定。这时需要区分真实对象变化、输入条件改变与测量链失效;应让独立参考、原始信号和状态记录分别回答相应问题。

墙腔空气可能与房间温度、湿度都不同,压差一变漏风量也变。封堵穿线孔属于安装问题,不能靠固定校准系数覆盖随排风状态变化的混合比例。参考探头也应避开同一漏风射流。

适用边界与技术结论

不能用温度补偿替代正确安装;若探头使用加热防凝露,直接测得的相对湿度不能未经相应处理当作未加热空气的相对湿度。

型号确认应同时覆盖正常工作范围、异常输入、输出有效性及允许维护条件,不能由某个静态点的表现推定全部运行状态。参考资料解释技术方法,实际范围、配置和限制以对应型号正式文件为准;不据其他制造商资料推定道威斯顿产品具有相同能力或认证。

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