CN1220851C

CN1220851C - Air conditioner controlier

Info

Publication number: CN1220851C
Application number: CNB021435421A
Authority: CN
Inventors: 后藤英二; 马场俊成; 野间博文; 原田员宏; 二宫恭久
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2001-09-28
Filing date: 2002-09-27
Publication date: 2005-09-28
Anticipated expiration: 2022-09-27
Also published as: JP2003106607A; KR20030028399A; CN1409063A

Abstract

The interruption processing (12) for controlling the converter is executed with higher priority in comparison with the interruption processing (11) for controlling the driving of the compressor (5).

Description

The control device of air conditioner and control method

Technical field

The present invention relates to use the control device and the control method of the air conditioner of microcomputer.

Background technology

Utilize Fig. 2, Fig. 6～Fig. 8 that prior art is described.

At present, rely on the driven compressor control of the air conditioner of microcomputer, running stops control etc. to the very important protection control of machine body when overload current occurring in motor, uses the interrupt function of microcomputer also to carry out override and handles.

The reason that Here it is DC sensorless motor is widely used as the motor of compressor.The detection method of the turned position of very important motor during as the starting of air compressor motor, running, could detected induced voltage in order only to utilize in the extremely short time, need to quicken to drive the processing speed of control, driven compressor control can be handled by override.

For this reason, when control and driven compressor are controlled the converter (converter) of the interrupt function of same use microcomputer and the DC voltage that plus-minus is supplied with compressor, driven compressor control is enrolled in the interruption processing of priority treatment.

Thereby, shown in Fig. 2 A, 2B, 2C, when carrying out in the flow process 10 that the expression air conditioner handles usually the processing from 10a to 10d, when the interrupt requests of driven compressor control and the interrupt requests of convertor controls produce simultaneously, as shown in Figure 6, interrupt the common processing 10a of air conditioner to 10d, at first, after the driven compressor control 11 of 11a, 11b (with reference to Fig. 2 B) is handled in the interruption that driven compressor control is carried out in execution, carry out the convertor controls 12 that 12a, 12b (with reference to Fig. 2 C) are handled in the interruption of carrying out convertor controls.

Such as, according to common processing, the step of handling 10a is the calculating of frequency, and handling 10b is fan motor control, and handling 10c is the control of expansion valve, handles 10d and be with communicating by letter of indoor set etc.In addition, output that interrupt to handle 11a and 11b and be respectively the signal of control driven compressor is handled and the control of the signal of control driven compressor is handled, and the control of interrupting handling 12a and 12b and be respectively the signal of the output processing of signal of control change device and control change device is handled.

After finishing driven compressor control 11 and convertor controls 12, implement control, so that represent (with reference to Fig. 2 A) discontinued processing from 10a to 10d in the common flow process of handling 10 of air conditioner again.

In addition, as shown in Figure 7, when carrying out the interrupt requests that produces driven compressor control 11 in convertor controls 12 processes interrupting the control input, interrupt convertor controls 12, utilize and interrupt carrying out driven compressor control 11, then, carry out the interruption of discontinued convertor controls 12 and handle, output translator control signal.

For this reason, as shown in Figure 8, when occurring the interrupt requests of driven compressor control in during convertor controls is with signal, convertor controls was to begin to export stipulated time Y from exporting zero hour X with signal originally,, carrying out driven compressor control needs time Z, is therefore postponing the moment Xa output of time Z.

But, in aforesaid control, because the interruption of driven compressor control 11 is handled than the interruption of convertor controls 12 and is handled preferential the implementation, so if the interrupt requests of convertor controls 12 produces the back and in output translator control with in during before the signal, produce the interrupt requests of driven compressor control 11, the interruption that then begins driven compressor control 11 is handled, even arrive the time that the convertor controls signal should begin to export, before the interruption of finishing driven compressor control 11 is handled, do not export the signal of control change device yet.

Therefore, will exist the number of revolutions of the DC voltage instability supplied with to the compressor of convertor controls, compressor with regard to problem of unstable.

Summary of the invention

The invention provides a kind of control device of air conditioner, comprising: the transverter of drive compression machine (inverter) device; The alternating voltage that will come from power supply is converted to DC voltage and to the converter of transverter unit feeding DC voltage; The zero potential detection means of the 0V current potential of the alternating voltage of detection power supply; When receiving the 0V electric potential signal of zero potential detection means output and control change device, the microcomputer of the control signal of the DC voltage supplied with to compressor of output; it is characterized in that: running stops control etc. to the very important protection of the machine body control when overload current occurring in motor, and the microcomputer override carries out handling at the control signal output of converter.

Description of drawings

Fig. 1 is the control system block diagram of the air conditioner of expression embodiment of the present invention.

Fig. 2 A is the main control flow chart of the microcomputer in the embodiment of the present invention.

Fig. 2 B is the driven compressor control flow chart of the microcomputer in the embodiment of the present invention.

Fig. 2 C is the convertor controls flow chart of the microcomputer in the embodiment of the present invention.

The flow chart of an example of the control mode when Fig. 3 is the interruption generation of representing in the embodiment of the present invention.

The flow chart of another example of the control mode when Fig. 4 is the interruption generation of representing in the embodiment of the present invention.

Fig. 5 is the control signal output waveform figure at converter in the embodiment of the present invention.

Fig. 6 is the flow chart of an example of the control mode of the interruption of expression conventional example when taking place.

Fig. 7 is the flow chart of another example of the control mode of the interruption of expression conventional example when taking place.

Fig. 8 is the control signal output waveform figure at converter in the conventional example.

The specific embodiment

Below, with reference to the description of drawings embodiments of the present invention.

(embodiment)

Below, with Fig. 1～Fig. 5 embodiment is described.

Fig. 1 is the block diagram of the control device of air conditioner.Microcomputer 1 have just produce the interrupt requests that driven compressor control handles at regular intervals driven compressor control with timer 1a with just produce the convertor controls timer 1b of the interrupt requests of convertor controls processing at regular intervals.

AC power 2 is that the converter 3 of DC voltage is connected with transverter device 4, compressor 5 by the AC voltage conversion that will supply with.

Zero potential detection means 6 detects the 0V voltage of AC power 2.In addition, when the voltage that detects AC power 2 in zero potential detection means 6 is 0V, signal 7 is input in the microcomputer 1 from zero potential detection means 6, the increase or the minimizing of the DC voltage of compressor 5 supplied with in signal 8 control change devices 3 and control, the number of revolutions of signal 9 control transverters 4 and control compressor 5.

In the control device of the air conditioner of said structure, be input to microcomputer 1 from the signal 7 of zero potential detection means 6 outputs, the signal 7 beginning convertor controls by this input are with the counting of timer 1b.And, when convertor controls is carried out the stipulated time with timer 1b counting, if the interrupt request singal that output translator control is handled, then the interrupt function of microcomputer 1 is moved, from microcomputer 1 to converter 3 output signals 8, the control of converter 3 can be carried out thus, and the DC voltage of supplying with compressor 5 can be controlled.

In addition, except convertor controls is used timer 1b, driven compressor control is moved and is counted the stipulated time with timer 1a, if produce the interrupt request singal that driven compressor control is handled, then the interrupt function of microcomputer 1 is moved, control transverter device 4, be used to turn round by output and control the signal 9 of compressor 5, can carry out the control of the number of revolutions of compressor 5.

Below, use the control of the microcomputer 1 that is possessed in the process description control device of the present invention of Fig. 2 A, Fig. 2 B, Fig. 2 C.

Microcomputer 1 is from handling 10a repeats to control the processing of air conditioner to 10d flow process 10.Such as, in handling 10a, carry out the calculating of frequency, in handling 10b, carry out the control of fan motor.In addition, in handling 10c, carry out the control of expansion valve, in handling 10d, carry out communication indoor set.

At this moment, after driven compressor control is counted the stipulated time with timer 1a, produce driven compressor control and handle 11 interrupt requests, interrupt the processing in the flow process 10, carry out the interruption of the flow process 11 of the driving of controlling compressor 5 and handle 11a (output of the signal 9 of drive compression machine 5 is handled), 11b (processing of control signal 9) from processing 10a to 10d.

After carrying out interruption processing 11a, 11b, carry out the processing from processing 10a to 10d of discontinued flow process 10 again.Equally, after convertor controls is counted the stipulated time with timer 1b, produce convertor controls and handle 12 interrupt requests, interrupt the processing from processing 10a to 10d of flow process 10, carry out the interruption of the flow process 12 of the DC voltage of controlling transformation into itself's device 3 supply compressors 5 and handle 12a (the output processing of the signal 8 of control change device 3), 12b (processing of control signal 8).After carrying out interruption processing 12a, 12b, carry out the processing from processing 10a to 10d of discontinued flow process 10 again.

In the microcomputer of handling like this 1, when driven compressor control finishes, also produces simultaneously driven compressor simultaneously and control the interrupt requests of 11 interrupt requests and convertor controls 12 with the counting of timer 1b with timer 1a and convertor controls, as shown in Figure 3, set and to carry out convertor controls and drive control 11 with convertor controls 12 ratio piston compressors that interrupt handling 12a, 12b and preferentially carry out.

Equally, count the stipulated time with timer 1a in driven compressor control, produce in the interrupt requests of driven compressor control 11, the interruption processing 11a that carries out driven compressor control 11, the 11b process, when convertor controls count down to the interrupt requests generation of certain value, convertor controls 12 with timer 1b, as shown in Figure 4, the setting convertor controls is preferentially carried out with the interruption processing 11a, the 11b that interrupt processing 12a, 12b ratio piston compressor driving control usefulness.

Therefore, with regard to signal 8, also do not carry out interruption processing 11 even driven compressor control count down to certain value with timer 1a, as shown in Figure 5, signal 8 can suppress the change of the number of revolutions of compressor 5 in the time output that begins originally to export.

In addition, in the present invention, just can preferentially carry out the principal element of convertor controls, the reason that exemplifies out is to improve the processing speed of microcomputer.

According to above explanation, according to the present invention, the interruption by convertor controls is handled the interruption that has precedence over driven compressor control and is handled and carry out, and DC voltage that can the stable supplying compressor suppresses the change of compressor number of revolutions.

Claims

1. the control device of an air conditioner has:

The transverter device (4) of drive compression machine (5);

To convert DC voltage from the alternating voltage of power supply (2) to and supply with the converter (3) of DC voltage to described transverter device (4);

Detect the zero potential detection means (6) of 0V current potential of the alternating voltage of described power supply (2);

Reception by the signal of the 0V current potential of described zero potential detection means (6) output and when controlling described converter (3), the microcomputer (1) of the control signal of the DC voltage supplied with to described compressor (5) of output, it is characterized in that:

Described microcomputer (1), except that protection control, override is carried out at the control signal output of described converter (3) and is handled.

2. the control device of air conditioner according to claim 1 is characterized in that: handle with the driving control of described compressor (5) and compare, preferentially carry out the control of described converter (3) and handle.

3. the control device of air conditioner according to claim 1 is characterized in that: use the interrupt function of microcomputer (1) to carry out the control processing of described converter (3) and the driving control processing of described compressor (5).

4. the control method of an air conditioner, this air conditioner has:

The transverter device (4) of drive compression machine (5);

To convert DC voltage from the alternating voltage of power supply (2) to and supply with the converter (3) of DC voltage to described transverter device (4); And

Microcomputer (1) is characterized in that: comprising:

Detect the step of 0V current potential of the alternating voltage of described power supply (2);

Receive described 0V current potential signal, control the step of described converter (3);

Described microcomputer (1) is exported the step of the control signal of the DC voltage of supplying with to described compressor (5),

Described microcomputer (1), except that protection control, override is carried out the step of handling at the control signal output of described converter (3).