家电科技 ›› 2025, Vol. 0 ›› Issue (zk): 284-287.doi: 10.19784/j.cnki.issn1672-0172.2025.99.060

• 第二部分 制冷与空调 • 上一篇    下一篇

基于恒流源控制的PT100测温电路在超低温冷柜中的应用仿真

马廷1,2, 张景霞1, 王世超1, 张存瑞1   

  1. 1.青岛海尔电冰箱有限公司 山东青岛 266101;
    2.数字家庭网络国家工程研究中心 山东青岛 266101
  • 发布日期:2025-12-30
  • 通讯作者: 张景霞。E-mail:zhangjingxia.ref@haier.com。
  • 作者简介:马廷,学士学位。研究方向:制冷产品嵌入式软硬件研究。地址:山东省青岛市崂山区海尔路1号,E-mail:mating.ref@haier.com。

Simulation of the application of PT100 temperature measurement circuit based on constant current source control in ultra-low temperature cold storage

MA Ting1,2, ZHANG Jingxia1, WANG Shichao1, ZHANG Cunrui1   

  1. 1. Qingdao Haier Refrigerator Co., Ltd. Qingdao 266101;
    2. National Engineering Research Center of Digital Home Networking Qingdao 266101
  • Published:2025-12-30

摘要: 在超低温冷柜的控制系统中,实现温度的精准控制是一项关键的技术,针对这一问题,提出了采用铂电阻PT100传感器作为测温工具,保证了测量温度的高精度和可靠性,设计了基于1 mA恒流源控制的PT100测温电路实现对温度的精准控制,并根据PT100传感器的分度表,利用Cadence仿真软件对测温电路进行仿真分析,结果验证了电路的准确性,解决了超低温冷柜温度精准控制的问题。同时,通过仿真分析还可以提前评估电路性能,优化电路设计,极大的降低了开发成本和时间。

关键词: 超低温冷柜, PT100传感器, 恒流源, 测温电路, 仿真分析

Abstract: In the control system of ultra-low temperature freezers, achieving precise temperature control is a key technology. To address this issue, it is proposed to use platinum resistance PT100 sensors as temperature measurement tools, ensuring high precision and reliability of temperature measurement. A PT100 temperature measurement circuit based on 1 mA constant current source control is designed to achieve precise temperature control. Based on the calibration table of the PT100 sensor, the temperature measurement circuit was simulated and analyzed using Cadence simulation software. The results verified the accuracy of the circuit and solved the problem of precise temperature control in ultra-low temperature freezers. Meanwhile, through simulation analysis, circuit performance can be evaluated in advance and circuit design can be optimized, which greatly reduces development costs and time.

Key words: Ultra-low temperature freezer, PT100 sensor, Constant current source, Temperature measurement circuit, Simulation analysis

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