CN2356443Y

CN2356443Y - Phase losing protector of frequency changing air conditioner

Info

Publication number: CN2356443Y
Application number: CN 98242574
Authority: CN
Inventors: 谈金华; 叶小笛
Original assignee: JANGSU SHINCO ELECTRONIC GROUP AIR CONDITIONER MANUFACTURING Co Ltd
Current assignee: JANGSU SHINCO ELECTRONIC GROUP AIR CONDITIONER MANUFACTURING Co Ltd
Priority date: 1998-11-02
Filing date: 1998-11-02
Publication date: 1999-12-29
Anticipated expiration: 2008-11-02

Abstract

The utility model relates to a component for frequency-change air conditioners. The input end and the output end of the central processing unit of the utility model are connected with the control end of an intelligent frequency-changing module. The three-phase electric energy output end of the intelligent frequency-changing module is connected with the three-phase power supply cord of a compressor. Each phase cord of the three-phase power supply cord of the compressor penetrates through a corresponding current transformer. The output end of each current transformer is connected with one input cord connecting end of the input end and the output end of the central processing unit. When the current flowing through the three-phase power supply cord of the compressor lacks phase, the utility model protects the compressor from not being damaged. The utility model can be used for open-phase protection on the compressors of various frequency-change air conditioners.

Description

The phase-lacking protective device of transducer air conditioning

The utility model relates to a kind of parts of transducer air conditioning.

Existing transducer air conditioning only is provided with overcurrent protective device aspect current protection.This protective device is arranged on the DC power supply incoming line of intelligent transducer module.But when the three phase mains of being transported to compressor by the compressed machine power line of intelligent transducer module produces open-phase fault; because of very little to the current affects on the DC power supply incoming line; cause overcurrent protective device not judge, and cause being burnt out of compressor this fault.

The purpose of this utility model is, in case the device that a kind of compressor of transducer air conditioning in use generation phase shortage situation is provided, can protects in running order compressor.

The technical scheme that realizes the utility model purpose is; this phase-lacking protective device has compressor three-phase power line, intelligent transducer module and central processing unit; the input/output terminal of central processing unit links to each other with the control end of intelligent transducer module; the three-phase electric energy output of intelligent transducer module links to each other with the compressor three-phase power line; other three terminations of compressor three-phase power line are the terminations that can link to each other with the three-phase electric energy input of compressor; intelligent transducer module is provided with dc supply input, it is characterized in that.This phase-lacking protective device also has 3 current transformers, and each root phase line of compressor three-phase power line is passed a corresponding current transformer, and the output of each current transformer links to each other with a corresponding input terminal of the input/output terminal of central processing unit.

Above-mentioned current transformer has shell, coil, magnet ring, diode D1, resistance R 1 and capacitor C 1, shell connects central tube by base plate and lateral frame board constitutes, coil winding is on magnet ring and constitute the coil magnetic ring body, and this coil magnetic ring body is enclosed within on the central tube and is positioned among the lateral frame board; Each phase line of compressor three-phase power line is passed the central tube of a corresponding current transformer; One end of coil links to each other with the anode of diode D1, and the negative electrode of diode D1 links to each other with an end of resistance R 1, and the other end of resistance R 1 links to each other with the positive pole of capacitor C 1, and the negative pole of capacitor C 1 links to each other with the other end of coil; The common junction of resistance R 1 and capacitor C 1 is as the dc voltage electrode output of the output of current transformer: the negative pole of capacitor C 1 is as the direct voltage cathode output end of the output of current transformer.

The dc voltage electrode output of the output of above-mentioned current transformer links to each other the direct voltage cathode output end ground connection of the output of current transformer with a corresponding input terminal of the input/output terminal of central processing unit.

The utlity model has positive effect: because current transformer of the present utility model is arranged on the compressor three-phase power line; so in case the output signal of phase shortage, a corresponding current transformer becomes low level by high level; central processing unit receives this low level signal after internal processes is judged affirmation, then in the working signal vanishing level output of the port that links to each other with the intelligent transducer module control end by the control intelligent transducer module of original output; thereby the control intelligent transducer module stops output current at its three-phase electric energy output, and the protection compressor is not damaged.This protective device can be used for the compressor open-phase protection of split type transducer air conditioning, cabinet type transducer air conditioning, central transducer air conditioning and window formula transducer air conditioning.

Fig. 1 is the utility model structural representation.

Fig. 2 is the structural representation of current transformer of the present utility model.

Fig. 3 is the electrical schematic diagram of current transformer of the present utility model.

Fig. 4 is the electrical schematic diagram of intelligent transducer module internal structure of the present utility model.

The utility model will be further described below in conjunction with drawings and Examples.

Embodiment 1,

See Fig. 2 and Fig. 3, the structure of current transformer (1) is provided by figure.Current transformer (1) has shell (11), coil (12), magnet ring (13), diode D1, resistance R 1 and capacitor C 1, shell (11) connects central tube (11-1) by base plate (11-2) and lateral frame board (11-3) constitutes, coil (12) is wound on that magnet ring (13) is gone up and constitutes the coil magnetic ring body, and this coil magnetic ring body is enclosed within central tube (11-1) and goes up and be positioned among the lateral frame board (11-3); Each phase line of compressor three-phase power line (2) is passed the central tube (11-1) of a corresponding current transformer (1); One end of coil (12) links to each other with the anode of diode D1, and the negative electrode of diode D1 links to each other with an end of resistance R 1, and the other end of resistance R 1 links to each other with the positive pole of capacitor C 1, and the negative pole of capacitor C 1 links to each other with the other end of coil (12); The common junction of resistance R 1 and capacitor C 1 is as the dc voltage electrode output of the output of current transformer (1); The negative pole of capacitor C 1 is as the direct voltage cathode output end of the output of current transformer (1).

See Fig. 4, the structure of intelligent transducer module (3) is provided by figure.The name of this module is called the IPM30A module, is made by Japanese new power company, and model is TL105E.

See Fig. 1, the model of central processor CPU (4) is MB89D857, is made by Fujitsu.The resistance that 4 pin to 9 pin as input/output terminal of CPU pass through separately respectively links to each other with LW pin, LV pin, LU pin, HW pin, HV pin, the HU pin of intelligent transducer module (3) successively, and the output control signal is given intelligent transducer module (3); Broken ends of fractured bone INTO links to each other with the ARY pin of intelligent transducer module (3) in the 26 pin conduct of CPU, receives the feedback signal of intelligent transducer module (3); The P end and the N end of intelligent transducer module (3) are respectively the electrode input end and the negative input of DC power supply; The three-phase electric energy output of intelligent transducer module (3) links to each other with the three-phase electric energy input of compressor M by three phase lines of compressor three-phase power line (2).On each root phase line of compressor three-phase power line (2), respectively be with a current transformer (1), that is each phase line is passed the central tube (11-1) of a corresponding current transformer (1), a corresponding leg in 38 pin of the dc voltage electrode output of each current transformer (1) and the input/output terminal of central processing unit (4), 39 pin, 40 pin links to each other, the direct voltage cathode output end ground connection of each current transformer (1).

When the compressor M of air conditioner operate as normal, each current transformer (1) is all to central processing unit (4) output high level signal; When any one in three phase lines of compressor three-phase power line (2), when phase shortages (being that no current passes through) take place for any two or three, be enclosed within current transformer (1) on the phase line that no current passes through to central processing unit (4) output low level signal.

The corresponding program section of the software in the central processing unit (4) is designed to when 38 to 40 pin are high level, central processing unit (4) is at the working signal of 4 to 9 pin output control intelligent transducer module, and make intelligent transducer module (3) differ 120 three-phase alternating currents of spending at its three-phase electric energy output U, V, W end output phase, make the compressor operate as normal; When the signal that receives when any pin in 38 pin to 40 pin of central processing unit (4) is low level, all working signal vanishing level output of the control intelligent transducer module that will originally export at 4 to 9 pin.

So; in case when generation phase shortage that is arbitrary phase line no current pass through in compressor three-phase power line (2); then to transport to the signal of intelligent transducer module (3) control end be zero level to central processing unit (4); make the inner IGBT high power transistor T1 to T6 of intelligent transducer module (3) all can not conducting; and the equal no current output of U, the V, the W electric energy output end that make intelligent transducer module (3), protection compressor M is not damaged.

Claims

1; a kind of phase-lacking protective device of transducer air conditioning; has compressor three-phase power line (2); intelligent transducer module (3) and central processing unit (4); the input/output terminal of central processing unit (4) links to each other with the control end of intelligent transducer module (3); the three-phase electric energy output of intelligent transducer module (3) links to each other with compressor three-phase power line (2); other three terminations of compressor three-phase power line are the terminations that can link to each other with the three-phase electric energy input of compressor; intelligent transducer module (3) is provided with the direct current input; it is characterized in that; this phase-lacking protective device also has each root phase line of 3 current transformers (1) compressor three-phase power lines (2) and passes a corresponding current transformer (1), and the output of each current transformer (1) links to each other with an input terminal of the input/output terminal of central processing unit (4).

2, the phase-lacking protective device of transducer air conditioning according to claim 1, it is characterized in that, current transformer (1) has shell (11), coil (12), magnet ring (13), diode D1, resistance R 1 and capacitor C 1, shell (11) connects central tube (11-1) by base plate (11-2) and lateral frame board (11-3) constitutes, coil (12) is provided with around magnet ring (13), and the coil magnetic ring body is enclosed within on the central tube (11-1) and is positioned among the lateral frame board (11-3); Each phase line of compressor three-phase power line (2) is passed the central tube (11-1) of a corresponding current transformer (1); One end of coil (12) links to each other with the anode of diode D1, and the negative electrode of diode D1 links to each other with an end of resistance R 1, and the other end of resistance R 1 links to each other with the positive pole of capacitor C 1, and the negative pole of capacitor C 1 links to each other with the other end of coil (12); The common junction of resistance R 1 and capacitor C 1 is as the dc voltage electrode output of the output of current transformer (1); The negative pole of capacitor C 1 is as the direct voltage cathode output end of the output of current transformer (1).

3, the phase-lacking protective device of transducer air conditioning according to claim 2; it is characterized in that; the dc voltage electrode output of the output of current transformer (1) links to each other with the input terminal of the input/output terminal of central processing unit (4), the direct voltage cathode output end ground connection of the output of current transformer (1).