SU515095A1 - Microthermostat - Google Patents

Description

one

The invention relates to electronics and is intended for use in devices using thermostatically controlled objects, such as piezo quartz resonators.

Thermostatic devices are known that contain an evacuated external cylinder with holder posts and an internal cylinder, a temperature sensor, and an adjustment unit with a heater.

However, these devices have a low ability to maintain a constant temperature on the piezoelectric element and consume a significant amount of energy.

The purpose of the invention is to improve the accuracy of thermostat temperature control.

For this, the microthermostat is inserted. a tape made of a material with a low coefficient of thermal conductivity and fixed on the supports of the holder, on which is placed the inner bulb with. temperature sensor inside it. and an adjustment unit with a heater.

The drawing is a diagram of the device in two projections.

In the external evacuated canister - 1 there is a holder 2, on the racks of which a tape 3 is fixed with a low coefficient of heat conduction.

An internal cylinder 4 is installed on the tape with the piezoelectric element 5, the temperature sensor 6, the heater 7 and the temperature control unit placed in it.

Claims (1)

The microthermostat provides a uniform thermal field by arranging the piezoelement 5, the heater 7 with the control unit and the temperature sensor 6 in a closed, equipotential thermally internal cylinder 4, which is carefully insulated. A ceramic chamber is used as a thermal inner cylinder. insignificant mass. The inner walls of the chamber are covered with a conductive film that serves as a heater, and here is also placed a temperature sensor and a control circuit made using a hybrid film technology. Thermal insulation of the chamber is carried out by placing it in the evacuated volume of the mount in the holder Ci using suspensions made of a material with minimal thermal conductivity (for example, silk, fiberglass); coating the inner walls of the cylinder and external walls hour hail.) The use of a micro-thermostat provides a uniform heat-field on the piezoelement due to the complete shielding of the thermostatted object from direct external heat and allows the use of highly high-quality thermal insulation without deterioration of the resistance of a quartz resonator to shocks and vibrations. Formula of the Invention A microthermostat containing a vacuumized external cylinder with holder posts and an internal cylinder placed in it, a temperature sensor and a regulating unit with a heater, which is This is because, in order to improve the accuracy of the regulation, it is inserted into it: the tape is made of a material with a low thermal conductivity and fixed on the racks of the figure on which the inner cylinder is located, with zmeshennymi inside temperature sensor and a heater control unit. . five J 2 avl g i / 1