The utility model discloses a liquid expansion type temperature controller, which comprises a
temperature sensing assembly, an adjusting mechanism and a contact control
assembly, the
temperature sensing assembly comprises a hydraulic
temperature sensing bulb, a capillary tube and a diaphragm
capsule, the hydraulic temperature sensing
bulb, the capillary tube and the diaphragm
capsule form a
closed cavity, temperature sensing liquid is packaged in the cavity, and the contact control assembly is arranged in the cavity. The diaphragm
capsule is divided into an upper part and a lower part, the upper half part is connected with the adjusting mechanism through a diaphragm capsule
handle, the
lower half part is used for fixing the push rod, the contact control assembly comprises a base, a static contact, a moving contact and a reed, the reed is fixed at the
tail end of the push rod, and separation of the moving contact and the static contact is driven by displacement of the push rod. According to the utility model, through the synergistic effect of hydraulic temperature sensing and mechanical adjustment,
rapid response, high-precision
temperature control and stable operation are realized, the structure is compact, the anti-interference performance is strong, the temperature controller is especially suitable for industrial scenes with high temperature, frequent action or complex
electromagnetic environment, and the problems of contact adhesion, insensitive reset and the like of a traditional temperature controller are effectively solved.