Energy-saving type integral single phase AC electric motor starting and protection device

Abstract

An starter and protector for an energy-saving integral single-phase alternating current motor, belonging to cold compressor motor protecting equipment technology field, includes a housing, a cover, a motor protector mounted in the housing, a motor starter mounted on the housing, and a plug-in sheet mechanism composed of a L plug-in sheet, a N plug-in sheet and an earthing plug-in sheet. The motor starter includes a first pin, a second pin and a positive temperature coefficient thermistor, and is characterized in that the two ends of the positive temperature coefficient thermistor are equipped with a supporting wall separately, wherein the pair of the supporting walls being parallel with each other, a rostellum being arranged on the basic centered position of the upper side of each supporting wall, the two bottom sides of the positive temperature coefficient thermistor contacting the rostellum, and the two sides of the positive temperature coefficient thermistor holding with the first and the second pins separately. The invention has well energy-saving effect, and has substantial deflated volume, which being help to save the material for manufacturing the positive temperature coefficient thermistor.

Description

technical field [0001] The invention belongs to the technical field of motor protection devices for refrigeration compressors, and in particular relates to an energy-saving integrated single-phase AC motor starter and protector. Background technique [0002] The integrated single-phase AC motor starter and protector is a compressor motor starter protection device that integrates a motor starter and a motor protector. [0003] Previously, the applicant filed four patent applications for motor starters with the Patent Office of the State Intellectual Property Office of China, and their patent numbers are: ZL200320120087.3, ZL200320120088.8, ZL20032010089.3, and ZL20032010090.5. Later, it also applied for two patents on the integrated motor starter and protector, and their patent numbers are: ZL03219606.7 and ZL03219607.5. And also applied for a number of inventions and utility model patents such as overload protectors for single-phase AC motors, motor starters without power c...

AI Technical Summary

Problems solved by technology

However, the applicant believes that the above-mentioned disposal methods obviously lead to the increase of materials used for processing PTC and the waste of electric energy, which is not compatible with the economical economy that people advocate at present. Therefore, how to avoid the heat loss of PTC to reflect energy saving and material saving has become an issue of increasing concern to the industry

[0006] In addition, the installation of the above-mentioned L inserts, N inserts, and ground inserts is cumbersome. The specific performance is that the L, N, and ground inserts must be assembled before the cover is placed on the housing. That is, it is inserted into the corresponding tab hole on the preset case cover, and then the case cover carries L, N and the grounding tab cover to the shell, so the assembly efficiency is low and the stability of each tab is poor, there are deflection, looseness

The low assembly efficiency mentioned here is mainly due to the fact that the pre-installation of the inserts hinders the installation of the shell cover.

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