CN2432722Y

CN2432722Y - Three-phase pole-changing compress

Info

Publication number: CN2432722Y
Application number: CN 00221087
Authority: CN
Inventors: 张海鹰
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-07-20
Filing date: 2000-07-20
Publication date: 2001-05-30
Anticipated expiration: 2010-07-20

Abstract

The utility model relates to a three-phase pole-changing compressor. The utility model is characterized in that the common terminal of a coil L1 and a coil L2 is connected with the terminal of a relay K3; the common terminal of a coil L3 and a coil L4 is connected with the c terminal of a relay K4; the common terminal of a coil L5 and a coil L6 is connected with the f terminal of a relay K5; the left terminal of the L1 is connected with the b terminal of the relay K3; the left terminal of the L3 is connected with the e terminal of the relay 5; the left terminal of the L5 is connected with the d terminal of the relay K4; a relay switch K1 is connected between the b terminal of the relay K3 and the d terminal of the relay K4; a relay switch K2 is connected between the d terminal of the relay K4 and the e terminal of the relay K5; three-phase power supplies A, B, C are respectively connected with the electric columns of the relays K3, K4, K5. The utility model has the advantages of low cost, less power consumption, low starting load, and high reliability.

Description

Three-phase pole-changing compressor

The utility model relates to a kind of three-phase compressor, particularly a kind of three-phase pole-changing compressor.

Three-phase compressor is widely used in deciding on frequency cabinet air-conditioner, the convertible frequency air-conditioner at present.Difference frequently fixed and frequency conversion is the control section of compressor.Fixed frequency is only controlled cut-offfing of compressor by relay, thereby the fixed cost that frequently freezes is lower, but the high frequent startup can cause the heavy current impact electrical network, and the energy consumption height can change compressor rotary speed as requested, thereby the frequency conversion temperature control is stable, energy consumption is lower, but cost is higher.

The purpose of this utility model is exactly that a kind of low cost, low energy consumption, the startup load is low, reliability is high three-phase pole-changing compressor set will be provided.

The technical solution of the utility model is like this: a kind of three-phase pole-changing compressor set, be characterized in: three phase windings of compressor are connected to form by the Y type by A, B, three groups of windings of C, A group winding is made up of coil L1 and L2, B group winding is made up of coil L3 and L4, C group winding is made up of coil L5 and L6, and the right-hand member of coil L2, L4, L6 connects together; The contact a end of the public termination double-contact relay of coil L1 and L2 K3, the contact c end of the public termination double-contact relay K4 of coil L3 and L4, the contact f end of the public termination double-contact relay K5 of coil L5 and L6, the contact b end of another relay termination K3 of coil L1, the contact e end of another relay termination K5 of coil L3, the contact d end of another relay termination K4 of coil L5; Between the d of the contact of the contact of relay K 3 b and K4, be connected to relay beginning K1, between the e of the contact of the contact of relay K 4 d and K5, be connected to the K switch 2 of relay; A, B, C three phase mains are succeeded the electric bolt of electrical equipment K3, K4, K5 respectively.

Because the utility model is to make to have the ability of outputting two rotating speeds and power by control compressor inner lead, power output, electric current are half of the two poles of the earth during four utmost points, and torque is constant, only increases several relay switches, so cost is low, energy consumption is little, it is little to start load.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is inner lead figure and the external control figure that 2/4 bipolar threephase motor is done compressor electric motor.

According to motor speed formula N=60f (1-S)/P, when number of pole-pairs P changes can so that the motor synchronous rotating speed at double than change.Set that sub-winding is every two groups of coils mutually.If change the connected mode between two groups of coils, the sense of current of one group of coil in the winding is changed, then can form two utmost points and two kinds of magnetic fields of four utmost points.

A, B, C are three-phase power input end among Fig. 1, and L1, L2, L3, L4, L5, L6 are the motor windings of compressor, and K1, K2, K3, K4, K5 are relay switch.Relay switch is controlled according to cooling condition by cyclelog.During the running of two utmost points, relay switch K3 connects a point, and K4 connects the c point, and K5 connects f point, K1, K2 closure.During the running of four utmost points, relay switch K3 connects the b point, and K4 connects the d point, and K5 connects the e point, and K1, K2 disconnect.The twice of output valve when power output, rotating speed are four utmost points during two utmost points, torque is constant.

Claims

1, a kind of three-phase pole-changing compressor, it is characterized in that: three phase windings of compressor are connected to form by the Y type by A, B, three groups of windings of C, A group winding is made up of coil L1 and L2, B group winding is made up of coil L3 and L4, C group winding is made up of coil L5 and L6, and the right-hand member of coil L2, L4, L6 connects together; The contact a end of the public termination double-contact relay of coil L1 and L2 K3, the contact c end of the public termination double-contact relay K4 of coil L3 and L4, the contact f end of the public termination double-contact relay K5 of coil L5 and L6, the contact b end of another relay termination K3 of coil L1, the contact e end of another relay termination K5 of coil L3, the contact d end of another relay termination K4 of coil L5; Between the d of the contact of the contact of relay K 3 b and K4, be connected to relay beginning K1, between the e of the contact of the contact of relay K 4 d and K5, be connected to the K switch 2 of relay; A, B, C three phase mains are succeeded the electric bolt of electrical equipment K3, K4, K5 respectively.