Multichannel temperature controller with coupling terminals

Abstract

The invention discloses a multichannel temperature controller with coupling terminals. The multichannel temperature controller comprises a shell, small springs, the terminals, a large spring, a large push column, a copper ejector pin, a bimetallic strip, a cover and push arms. The shell is provided with counter bores, cover pin inserting openings and a center hole. The terminals comprise first flow carries, second flow carriers and third flow carriers. Bearing bushes are arranged on the third flow carriers, and are matched and in butt joint with bearing bushes at one ends of the second flow carriers. The second flow carriers are supported by conical springs and the small springs assembled in the counter bores. The middles of the second flow carriers are connected with the push arms. The large spring and the large push column are assembled on the center hole, and the copper ejector pin and the bimetallic strip are arranged at the upper end of the large push column. The cover is arranged above the bimetallic strip. A bearing bush contact mode is adopted, cost is reduced, the breakdown problem caused by point contact power-on is avoided, a silver layer is prevented from being damaged, and the service life of the temperature controller is prolonged. The temperature controller is novel in structure and convenient to assemble, multichannel control can be achieved at the same time, and the applicability of the temperature controller is improved.

Description

technical field [0001] The invention relates to the technical equipment field of a thermostat, in particular to a multi-channel thermostat with shaft-connected terminals. Background technique [0002] The thermostat is a series of automatic control elements that cause physical deformation inside the switch according to the temperature change of the working environment, resulting in some special effects, and a series of automatic control elements that generate conduction or disconnection actions, also called temperature control switches, temperature protectors, and temperature controllers. Controller, referred to as thermostat. The temperature is transmitted to the temperature controller through the temperature protector, and the temperature controller sends a switch command to control the operation of the equipment to achieve the ideal temperature and energy-saving effect. Its application range is very wide. According to different types of thermostats, it is used in househol...

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Problems solved by technology

[0004] The thermostats in the prior art have the following deficiencies. 1. When the single-loop thermostat is applied to multi-loop electrical control, it cannot achieve power-off protection at the same time, so the design itself has certain limitations; 2. Silver The surface of the contact will be attached with a certain thickness of silver layer. Silver is a metal conductor with very low resistivity, which can effectively reduce internal resistance and reduce internal resistance; but silver is also a precious metal, and the surface of silver contact If the thickness of the silver layer is large, the material cost will remain high; if the thickness of the silver layer is small, not only the control effect of internal resistance will decrease, but also the silver layer will be destroyed after a period of use, which will affect the use of the thermostat; 3. The current mainstream KSD301 thermostat has a maximum rated voltage of 250V and a maximum rated current of 16A, which cannot be applied to electrical appliances with high power, high voltage, and high current. Serious self-heating problems will also cause damage to the silver layer on the surface of the silver contacts, which will aggravate the self-heating phenomenon. In severe cases, it will even cause the silver points to stick or fall off, resulting in the overheating of the whole machine or the inability to power on the machine.

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