CN2731136Y

CN2731136Y - Switch circuit starting device for full closed refrigeration compressor

Info

Publication number: CN2731136Y
Application number: CN 200420076708
Authority: CN
Inventors: 吴永昌; 文耿
Original assignee: Huangshi Dongbei Electrical Appliance Co Ltd
Current assignee: Huangshi Dongbei Electrical Appliance Co Ltd
Priority date: 2004-09-24
Filing date: 2004-09-24
Publication date: 2005-10-05
Anticipated expiration: 2014-09-24

Abstract

The utility model relates to a switch circuit starting device for full closed refrigeration compressor, comprising a time control circuit and a bidirectional thyristor. The time control circuit is electronically connected with the bidirectional thyristor. Compared with a general PTC starter in the prior art, the utility model mainly solves the problem of a large loss of a PTC. Thus, the starter can enhance the power-efficiency ratio of the compressor.

Description

A kind of switching circuit starter of hermetically sealed compressor

(1) technical field: the utility model relates to the refrigerant compression machine technology, is a kind of switching circuit starter of hermetically sealed compressor.

(2) background technique: at present, the small-power Piston Refrigerant Compreessor generally starts with heavy hammer started device and positive temperature coefficient thermistor PTC starter.But have electrical spark to produce during the work of the heavy hammer started device of Yin Putong, can not be used in the compressor of inflammable matter such as R600a, PTC starter contactless switch has overcome the above-mentioned shortcoming of heavy hammer type starter, so R600a working medium compressor generally starts with the PTC starter.But common PTC starter is to be made of single PTC, be installed in the operation that PTC in the circuit will participate in motor for a long time, himself generate heat and to consume certain power, this starter resistance when starting beginning (normal temperature) is 9-24 ohm, and the motor secondary winding is connected, and bigger inrush current generates heat PTC rapidly, so that reach curie temperature, the sudden change of PTC resistance can increase several magnitude, makes the motor secondary winding be similar to disconnection.But in motor operation course, still there is very little electric current to exist in PTC and the secondary winding, thereby consumes power of electric motor, generally can consume more than the 3W.Electric efficiency is descended to some extent, thereby influence the Energy Efficiency Ratio of compressor, this is a fatal defective to high-efficient compressor.

(3) summary of the invention: the purpose of this utility model is to solve the big problem of existing common PTC starter consume, and a kind of switching circuit starter of energy-saving hermetically sealed compressor is provided.

Concrete scheme of the present utility model is: adopt a time control circuit to be electrically connected with a bidirectional triode thyristor and form.

Time control circuit described in the utility model is by two triode Q1, Q2, six capacitor C 1-C6, and five resistance R 1-R5, four diode D5-D8 and rectifying bridge type are electrically connected by accompanying drawing and form.

The utility model has reduced the working loss of starter self in explosion-proof, be used for the Energy Efficiency Ratio that compressor can improve compressor, is particularly suitable for using in the high-efficiency full-closed reciprocating-piston type refrigerating compressor of R600a working medium.

(4) description of drawings:

Accompanying drawing is structure of the present utility model, fundamental diagram.

(5) embodiment:

Referring to accompanying drawing, be circuit structure of the present utility model in the dashed rectangle among the figure.The utility model is to be formed by connecting by time control circuit and a bidirectional triode thyristor T1, time control circuit wherein is by two triode Q1, Q2, six capacitor C 1-C6, five resistance R 1-R5, four diode D5-D8 and rectifying bridge type are electrically connected by accompanying drawing and form.

The utility model is connected with the main winding and auxiliary winding of compressor electric motor with an operation capacitor C u by an inductor L1, and referring to accompanying drawing, its working principle is summarized as follows:

Chien shih compressor start work during the admittance of this starter by time control circuit control bidirectional triode thyristor.When connecting dispatch from foreign news agency, the bidirectional triode thyristor T1 of switching circuit and air compressor motor secondary winding are connected, and enter on state, freezer compressor is started, simultaneously, power supply passes through to be worked by bridge rectifier output dc voltage, confession triode Q1, Q2 after capacitor C 1, resistance R 1 step-down, and whole circuit enters the state of clocking.The compressor of different model has different time needs, can change the ON time of Q2 by the parameter that changes capacitor C 2, C5 and resistance R 2, realizes the needed time state.After machine to be compressed starts, in the short time (≤1S) make bidirectional triode thyristor T1 enter cut-off state.Internal resistance during the not conducting of switching circuit starter is more much bigger than PTC starter, thereby loss is much smaller, and the loss of switching circuit starter is less than 0.8W.

Claims

1. the switching circuit starter of a hermetically sealed compressor is characterized in that: adopt a time control circuit to be electrically connected with a bidirectional triode thyristor and form.

2. the switching circuit starter of a kind of hermetically sealed compressor according to claim 1, it is characterized in that: described time control circuit is by two triode Q1, Q2, six capacitor C 1-C6, five resistance R 1-R5, four diode D5-D8 and rectifying bridge type are electrically connected by accompanying drawing and form.