Energy-saving type power-consumption-free single-phase alternating current motor starting protector with structure improvement

Abstract

The invention discloses an energy-saving type power-consumption-free single-phase alternating current motor starting protector with structure improvement, and belongs to the technical field of refrigeration compressors. The energy-saving type power-consumption-free single-phase alternating current motor starting protector comprises a shell body, a shell cover, an overload protector, a power-consumption-free starter and an externally connected terminal mechanism, wherein an overload protector containing cavity, a power-consumption-free starter containing cavity, an externally connected terminal mechanism insertion cavity and a starting controller containing cavity are defined by the shell body; the shell cover is matched with the shell body; the overload protector is arranged in the overload protector containing cavity; the power-consumption-free starter comprises a power-consumption-free starter body and a starting controller; the externally connected terminal mechanism is matched with the externally connected terminal mechanism insertion cavity in an inserting mode. The energy-saving type power-consumption-free single-phase alternating current motor starting protector is characterized in that externally connected terminal mechanism insertion cavity comprises a first insertion sheet cavity, a second insertion sheet cavity, a third insertion sheet cavity and a fourth insertion sheet cavity. The externally connected terminal mechanism comprises a first insertion sheet, a second insertion sheet, a third insertion sheet, a fourth insertion sheet and a fifth insertion sheet. The first insertion sheet is matched with the first insertion sheet cavity in an inserting mode, the second insertion sheet is matched with the second insertion sheet cavity in an inserting mode, the third insertion sheet is matched with the third insertion sheet cavity in an inserting mode, the fifth insertion sheet is matched with the fourth insertion sheet cavity in an inserting mode, the fourth insertion sheet is in electrical connection with the overload protector, and the first insertion sheet and the third insertion sheet serve as transfer terminals to be connected with an externally connected power source and a capacitor.

Description

technical field [0001] The invention belongs to the technical field of refrigeration compressors, and in particular relates to a non-power consumption and energy-saving single-phase AC motor starting protector with improved structure, which is used for starting and protecting the refrigeration compressor motor. Background technique [0002] Since the common refrigeration compressor motor is a low-power single-phase AC motor, a starter is required to assist in starting, and when the compressor enters a normal operating state, it needs to be protected by an overload protector. Specifically, the overload protector The device ensures that the refrigeration compressor is disconnected from the power supply when it is overloaded during operation, so as to prevent the compressor from overheating and causing damage. [0003] In the past, the starter and overload protector of the refrigeration compressor were usually designed as a split structure, that is, the starter and the overload...

AI Technical Summary

Problems solved by technology

[0007] First of all, as far as the housing is concerned, due to the scattered and disorderly distribution of the external terminal mechanism (also known as the blade mechanism or pin mechanism in the industry) on the housing, it is difficult to reduce the volume of the housing, so that it is impossible to reduce the impact on the refrigeration compressor. Occupies space, and also affects compact structure, convenient and efficient assembly, saving material consumption and reliability in use

In addition, since it is necessary to form six baffles for blocking the pins (including grounding pins, N pins and L pins) on the shell cover and the side facing the housing, and four anti-movement limit stops to prevent the pins from moving Protrusion and five supporting flanges for supporting pins (for details, please refer to paragraph 2 on page 5 to paragraph 1 on page 6 of the specification of this patent), thus not only significantly increasing the complexity of the shell structure, but also affecting The installation efficiency of the pins; due to the unreasonable structure of the shell itself, the pins (ie ground pins, N pins and L pins) must be assembled before the shell cover is fitted to the shell, that is to say, the pins must be assembled first. Insert them into the corresponding pin slots (that is, pin holes) preset on the case cover, and then fit the case cover together with the pins with the housing, so the assembly efficiency will be seriously affected, because pre-installing the pins on the case cover will The shell cover interferes with the shell, and the stability of the pins is difficult to guarantee, and there is a risk of deflection and looseness

[0008] Secondly, as far as the starter is concerned, one, although contacting both sides of the bottom of the PTC thermistor with the top protrusion can significantly reduce the PTC thermistor in the case. The supporting area in the cavity can significantly reduce the volume of the positive temperature coefficient thermistor, for example, the weight is reduced from 35-40g to 15-16g, but because the circumferential side edge of the positive temperature coefficient thermistor still needs It is in contact with the wall of the positive temperature coefficient thermistor cavity in a large area, so it is not enough to reflect the ultimate energy-saving effect. The specific performance is that the volume of the positive temperature coefficient thermistor is still relatively large, and the weight (15-16g) still biased

Theoretically speaking, forming a support wall on the corresponding cavity wall of the positive temperature coefficient thermistor cavity and forming a protrusion on the support wall can make up for the above-mentioned deficiency, so that the volume of the positive temperature coefficient thermistor can be further reduced, The weight can be further reduced and the energy-saving effect can be reflected to the extreme degree, but repeated experiments by the applicant show that this idea is not advisable, because on the one hand, the aforementioned first and second pins and the positive temperature coefficient thermistor On the other hand, the installation of the starter is troublesome due to excessive occupation of the space of the PTC thermistor cavity; The structure of a pair of support walls themselves is relatively complicated, which leads to a relatively complicated mold for manufacturing the shell; third, because the top protrusion is formed on the support wall, the bottom of the positive temperature coefficient thermistor, that is, the bottom surface, is in direct contact with the positive temperature The distance between the cavity bottom of the coefficient thermistor cavity is the sum of the height of the support wall and the height of the top protrusion, so there is a situation where the positive temperature coefficient thermistor is raised too much, so that the positive temperature coefficient thermistor The positive temperature coefficient thermistor cavity protrudes from the upper part of the device, and the protruding part needs to be compensated by the raised cavity on the cover (the protruding...

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