Adjusting temperature controller

Abstract

An adjustable thermostat comprises a shell (1) with a through hole (11), a temperature adjusting device with an adjusting screw (42) which is arranged in the through hole (11) and a link gear which is provided with a bimetallic strip (6) as a temperature sensing element. The adjustable thermostat is characterized in that the through hole (11) is provided with a metal nut (41) which matches with the adjusting screw (42) and an elastic temperature adjusting piece (5) which counterbalances the adjusting screw (42) at the tail; one end of the temperature adjusting piece (5) is fixed on the shell (1), and the other end is a moveable end which counterbalances the inner part of the central bending surface of the bimetallic strip (6). The invention applies pressure on the bimetallic strip via the temperature adjusting piece, and no current passes through the temperature adjusting piece so that no softening results; thereby improving the adjustment precision; a copper nut is embedded and fixed in the shell during the process of molding the shell, so that the cooper nut is integral with the shell and metal threads thereof are not prone to abrasion, thereby improving the service life of the product.

Description

technical field [0001] The invention relates to a temperature controller, in particular to an adjustable temperature controller which can be applied to temperature control or protection equipment and instruments such as water heaters, microwave ovens, dry closets, air conditioners, and aerospace. Background technique [0002] The thermostat uses the principle of pressure to push the contacts on and off, so as to control the electrical equipment that stops or starts working when the electrical equipment reaches a certain temperature. At present, most common thermostats are adjustable thermostats, that is, the on-off of the thermostat at different temperatures can be adjusted by adjusting the temperature sensing element of the thermostat itself. For example, the existing Chinese utility model "Adjustable Thermostat" with the patent number of ZL00218075.8 relates to an improved technology of a thermostat, which is suitable for controlling the temperature of the air in a room or...

AI Technical Summary

Problems solved by technology

[0003] However, the patent has the same problem as other common adjustable thermostats in the prior art, that is, the temperature-regulating screw rod directly cooperates with the screw thread of the bakelite shell itself. Very bad, after several times of use, the bakelite shell will wear and loosen the screw, resulting in inaccurate temperature adjustment and low service life of the thermostat nut

In addition, ordinary adjustable thermostats generally adjust the temperature by adjusting the pressure of the reed with screws. When the current passes through the reed, the reed will heat up due to its own resistance, and the reed will soften due to heat, and the pressure will decrease, resulting in The temperature deviation is large and unstable, and it also cannot meet the requirements of high precision

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