CN1427157A

CN1427157A - Starting control method of variable volume compressor

Info

Publication number: CN1427157A
Application number: CN 01144378
Authority: CN
Inventors: 金贤; 白正石
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2001-12-18
Filing date: 2001-12-18
Publication date: 2003-07-02
Anticipated expiration: 2021-12-18
Also published as: CN1201082C

Abstract

A start control method for variable-capacity compressor features that when the compressor runs in the first mode, the motor rotates forward, and when the compressor runs in the second mode, the motor rotates forward by one revolution and then backward. Its advantage is low-torque start.

Description

The start-up control method of variable displacement compressor

One, technical field

The present invention relates to a kind of compressor, particularly relate to a kind of can receiving, make the start-up control method of the variable displacement compressor that compressor fully turns round with little torque.

Two, background technique

Generally speaking, compressor is after sucking the low-temp low-pressure gaseous refrigerant after the evaporator evaporation, and compression also produces High Temperature High Pressure.Compare with other life household electrical appliances, working principle such as refrigerator or air conditioner and structures shape can produce much noise during its work, require to have the de-noising performance, noise drops to minimum during work, a standard when becoming user's free choice of goods.

As shown in Figure 1, traditional compressor (20) is by three-wire type terminal (21) (22) (23), provides driving power to motor (omitting among the figure).

At this moment, above-mentioned three-wire type terminal (21) (22) (23) as shown in Figure 2, respectively by secondary terminal (21, A), main terminal (22, B) and common terminal (23, C) form.Because above-mentioned secondary terminal (21, A) and main terminal (22, end B) all with shared terminal (23, C) connection, therefore, motor (omitting among the figure) is towards an aspect rotation.

As mentioned above, adopt the compressor start method of conventional art, exist following technical problem.

1, behind startup or the Defrost operation, motor only rotates and Driven Compressor towards the single direction of setting, and therefore, produces the noise of self, easily brings out overload.

2, just adopting/during the backward rotation motor,, start and be difficult to accomplish that the both sides level of torque is identical when stopping because the induction motor characteristic limits, so during the motor antiport, it is little to start or stop torque, when refrigerator cold start-up or defrosting back start, start the failed probability height.

Three, summary of the invention

In view of this, the objective of the invention is to, a kind of start-up control method of variable displacement compressor is provided, when refrigerator cold start-up or defrosting back are started, even under weak cold drive manner, adopted just/reverse motor after just changeing, can implement backward rotation, then can receive with little torque the effect that compressor is fully turned round.

The objective of the invention is to realize by following technological scheme.

A kind of start-up control method of variable displacement compressor is characterized in that being made up of following two stages, when above-mentioned compressor turns round in the 1st kind of mode of setting, makes said motor carry out the stage of forward running; When above-mentioned compressor turned round in the 2nd kind of mode of setting, said motor began once just to change, and carries out the counter-rotational stage afterwards.

Purpose of the present invention can also further realize by following technical measures.

The start-up control method of aforesaid variable displacement compressor, wherein the 1st kind of mode is strong cold drive manner.

The start-up control method of aforesaid variable displacement compressor, wherein the 2nd kind of mode is weak cold drive manner.

As mentioned above, the motor starting method that adopts variable capacity mode compressor of the present invention to use, utilized motor just/counter-rotational characteristic, startup after cold start-up and the defrosting, unconditionally use the torque characteristics of forward rotation by the microprocessor of refrigerator, after rotating for the 1st time, if in the ON/OFF operation area, carry out backward rotation, then can receive with little torque the effect that compressor is fully turned round.

Four, description of drawings

Fig. 1 is the schematic representation of traditional compressor.

Fig. 2 is a power end wiring schematic diagram shown in Figure 1.

Fig. 3 is the flow chart of the start-up control method of variable displacement compressor of the present invention.

Five, embodiment

Below, to adopting the start-up control method of variable capacity mode compressor of the present invention, be described below in conjunction with Fig. 3.

As shown in Figure 3, at first, distinguish whether the refrigerator that variable displacement compressor is housed has become the 1st kind of setting means (S10).

Above-mentioned the 1st kind of mode is strong cold drive manner, and promptly motor is answered the mode of forward rotation.

Then, if above-mentioned judged result is above-mentioned the 1st a kind of setting means (S10), so, judge cold start-up or the defrosting after whether start (S20).

Above-mentioned judged result (20) starts as above-mentioned cold start-up or after defrosting, and so, the microprocessor of refrigerator and relevant controlling device are controlled it towards the big direction running (S30) of torque settings value.

And above-mentioned judged result (S10) is set if not the 1st kind of mode, then judges whether to be that the 2nd kind of mode set (S40).

Here, above-mentioned the 2nd kind of mode is weak cold drive manner, so motor should be the mode of antiport.

Then, above-mentioned judged result (S40) is if be that the 2nd kind of mode set, and so, whether starts (S50) after judging cold start-up or defrosting.

Above-mentioned judged result (S50) is as having started for above-mentioned cold start-up or after removing case, and so, the control beginning operates as forward rotation the 1st time, starts since the 2nd time afterwards to be backward rotation operation (S60).

As mentioned above, adopt the present invention, just using/the start-up control method of the variable displacement compressor of reverse motor, when the refrigerator cold start-up, just use/compressor of reverse motor, control, make it towards the big direction running of torque settings value by the microprocessor and the relevant controlling device of refrigerator.

And, when starting behind the defroster, just using/compressor of reverse motor, control by the microprocessor and the relevant controlling device of refrigerator, make it towards the big direction running of torque settings value.

The 2nd kind of mode when starting in cold start-up with after defrosting, begins the 1st running and starts towards the big forward rotation of torque, afterwards, from the 2nd startup, promptly controls and carries out antiport.

Claims

1, a kind of start-up control method of variable displacement compressor is characterized in that being made up of following two stages,

When above-mentioned compressor turns round in the 1st kind of mode of setting, make said motor carry out the stage of forward running;

When above-mentioned compressor turned round in the 2nd kind of mode of setting, said motor began once just to change, and carries out the counter-rotational stage afterwards.

2, the start-up control method of variable displacement compressor according to claim 1 is characterized in that described the 1st kind of mode is strong cold drive manner.

3, the start-up control method of variable displacement compressor according to claim 1 is characterized in that described the 2nd kind of mode is weak cold drive manner.