JPH0339857A - Controller for air conditioner - Google Patents

Abstract

PURPOSE:To lower the rotating speed of a fan motor when it becomes a rotating speed for generating vibration sound and to prevent the sound of a wall, etc., by providing control means for controlling the rotating speed of the motor and rotating speed detecting means for detecting the upper limit speed of the motor. CONSTITUTION:Remote operation means A for altering governing of a fan motor for an air conditioner by a remote operation has a remote operation unit 2 for sending signals for operating/ stopping the conditioner and altering a fan motor speed, etc. Signal receiving means B has a receiver 3 for receiving a signal of the unit 2. Control means C controls the rotating speed of a fan motor 5, and has rotating speed detecting means D for detecting the rotating speed of the motor 5. When the speed of the motor 5 exceeds a set value, the means C can reduce the speed by one stage to prevent vibration from propagating to wall, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for an air conditioner.

[Conventional technology]

FIG. 4 is a block diagram of a conventional fan control device disclosed in, for example, Japanese Unexamined Patent Publication No. 63-11091 (hereinafter referred to as the first conventional example), and FIG. 5 shows the operation of 5SR6 in FIG. 6 is a flowchart of a subroutine for controlling the fan motor of this conventional example. In FIG. Machine control unit, 1
5 is an operating section, 16 is a zero point ignition control device, and 17 is a delay device.

Next, the operation of this conventional example will be explained using FIGS. 4 to 6. In FIG. 1 of the drawings, when the wind speed is set with the operation unit 15, a signal a is output from the control unit 14 to turn on and off the 5SR6 (see FIG. 5(A)). This signal a is transmitted by the zero point ignition control device 16 as shown in FIG. 5(B).
As shown in the figure, when the phase of the AC waveform is 0 degrees or 180 degrees, it is converted into a signal that transitions from the OFF state to the ON state, and is further delayed by a delay device 17 by 1/4 of the AC period. signal C (see FIG. 5(C)).

Add this signal to the photodiode of 5SR6 and
By turning on and off the fan motor 5, the moment the phase angle of the AC waveform reaches 907f or 61270 degrees, the fan motor 5
An AC voltage with a waveform as shown in Fig. 5(D) is applied to the 5S
The rotation speed of the fan motor 5 is controlled by changing the on-state and on-state duty of R6. Therefore, in the above control method, when the 5SR6 is turned on at 90 degrees or 270 degrees of the AC waveform, the instantaneous maximum value of the AC voltage is applied to the fan motor 5, so the generated torque is large.
This makes it possible to suppress the vibration of the fan motor itself to a small level.

In addition, in the above conventional example, the control section! 4 to the zero point firing control device 16. ! Using the i-spreading device 17, the phase is 90
Turn on at 270 degrees or 270 degrees.

Although the alternating current to be turned off is applied to the seven motor motor 5, this may be controlled by a microcomputer program.

Next, the operation control of this conventional example will be explained with reference to FIG. 6.

FIG. 6 is a flowchart of a subroutine for controlling the fan motor in the control program of the microcomputer.

rrrI In FIG. 6, when the processing mode of the microcomputer branches to a subroutine, first, in step 50, it is determined whether to turn on or turn off the signal that controls the fan motor 5 (FIG. 4). . And that j
When the IJ determination is performed, the process proceeds to step 51 or 56, where it is determined whether the current signal is on or off, and if there is no need to invert the output, this subroutine is immediately terminated. However, if it is necessary to change the output, proceed to step 52 or 57 and read the input signal indicating the phase, and in the respective step 53 or 58 the phase is 0.
degree or 180 degrees. The phase is 0 degrees or
If it is not 180 degrees, return to step 52 or 57 and read the input signal 8 again indicating the phase, and if it is 0 degrees or 180 degrees,
If so, a delay of 1/4 cycle is performed in step 54 or 59, and the output signal for fan motor control is inverted in step 55 or 60. Then, this subroutine ends.

Next, Japanese Utility Model Application Publication No. 55-102608 (hereinafter referred to as the second conventional example) discloses a fan control device for blowing air in an automobile, in which the running speed of the car is detected by a speed detecting means, and the detected output is used to blow air. It is configured to control the rotational speed of the fan, and automatically reduces the rotational speed of the fan to reduce fan noise. Further, the speed detecting means is constituted by a position detecting device that detects the position of a pointer provided on the speed meter step by step.

[Problem to be solved by the invention]

As described above, in the conventional example, since the fan motor control device is configured as described above, the rotation speed of the fan motor increases due to voltage fluctuation, which transmits vibration to walls etc. and generates vibration noise. There was a problem.

This invention was made in order to solve the problems of the conventional example as described above.When the rotation speed of the fan motor reaches the rotation speed (upper limit rotation speed) that generates vibration noise due to vibrations of walls, etc., the fan It is an object of the present invention to provide a control device for an air conditioner that reduces the rotational speed of a motor and prevents the generation of vibration noise from the wall or the like.

[Means to solve the problem]

For this reason, the present invention includes a remote control means for remotely changing the speed of a fan motor of an air conditioner, a signal receiving means for receiving a signal from the remote control means, and a control means for controlling the rotation speed of the fan motor. The above objective is achieved by an air conditioner control device comprising a control means and a rotation speed detection means for detecting the upper limit rotation speed of a fan motor.

(Function) The air conditioner control device according to the present invention changes the speed of the fan motor by remote control using the remote control means,
The signal receiving means receives a signal from the remote control means, the control means controls the rotation speed of the fan motor, and the rotation speed detection means detects the −L limit rotation speed of the fan motor.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 is an electrical circuit diagram of a control device for an air conditioner that is an embodiment of the present invention, Figure 2 is a diagram showing a method of applying voltage to 5SR6 in Figure 1, and Figure 3 is an electrical circuit diagram of a control device for an air conditioner that is an embodiment of the present invention. 5 is a flowchart for controlling operations.

In Figure 1 of the drawings, A is a remote control means for remotely changing the speed control (speed adjustment) of the fan motor of the air conditioner, and sends signals such as start/stop and fan motor speed change to the air conditioner. It consists of a remote controller 2 for delivery. Reference numeral B denotes a signal receiving means, which is composed of a receiver 3 that receives a signal from the remote controller 2. C
is a control means for controlling the rotation speed of the fan motor 5,
It consists of a microcomputer (hereinafter referred to as microcomputer) and a solid state relay (hereinafter referred to as SSR) that controls the speed of the fan motor.

Reference numeral D denotes a rotation speed detecting means comprising a rotation speed detection element (Hall element) 11 for detecting the rotation speed of the fan motor 5, particularly the upper limit rotation speed. Further, 4 is an AC power supply, 8 is a diode for full-wave rectification, and a transistor 9 is provided to input the full-wave rectified waveform to the microcomputer 1.
0 is a pull-up resistor for transistor 9. 12
is a transistor, and 13 is a resistor.

Next, the drive and rotational speed control of the fan motor, which is the operation of this embodiment, will be explained with reference to FIGS. 1 to 3, focusing on the control means C.

First, the drive of the fan motor will be explained using FIG. 2.

FIG. 2 of the drawings shows a method of applying voltage to the SSR for driving the fan motor.

In FIG. 2, waveform (i) is a waveform after full-wave rectification by diode 8, and by forming the waveform in transistor 9, a rectangular wave of waveform (ii) is input to microcomputer 1. Microcomputer! is the width of waveform (i i i) after a time t from the fall of waveform (ii) from H to L.
outputs a pulse of The pulse of waveform (iii) is 5SR
6, the fan motor rotates.

If there is no pulse of width X in waveform (iii), the fan motor will stop.

Next, the rotation speed control of the fan motor in the operation of this embodiment will be explained with reference to FIG. 3, focusing on the control means C.

In FIG. 3, in step 11, the receiver 3 determines whether an operation ON signal from the remote controller 2 has been received.

When the operation ON signal is received, the process proceeds to step 11, and it is determined whether the previously set fan speed and the current set fan speed are the same. If not, the process proceeds to step 12, where it is determined whether "the currently set fan speed is 4". (Fan motor rotation speed is 4)
In the order of 3 > 2 > 1 > entrainment, the rotation speed increases as it goes to the left). If the fan speed is 4, go to step 13 and store 4 in accumulator A in the ROM (read only memory) area. Step 1
2, if the currently set fan speed is not 4, step 1
Proceeding to step 4, it is determined whether "the currently set fan speed is 3", and if it is 3, 3 is stored in accumulator A in step 15. If the currently set fan speed is not 3 in step 14, the process proceeds to step 16, where it is determined whether "the currently set fan speed is 2", and if it is 2, 2 is stored in accumulator A in step 17. If the currently set fan speed is not 2 in step 16, the process advances to step 18 and 1 is stored in accumulator A.

After that, the process proceeds to step 19, where a flag indicating whether the rotation speed of the fan motor detected by the rotation speed detection element (Hall element) 11 which is the rotation speed detection means exceeds the upper limit setting value is detected, and if the flag is 0, the flag is detected. , go to step 20,
Leave the contents of the accumulator as is. if,
If the flag is 1, the process proceeds to step 21, where 1 is subtracted from the data in accumulator A and the result is stored in accumulator A.

Then, in step 22, the contents of accumulator A are 5.
Turn on SR6.

Next, the process proceeds to step 23, where it is determined whether the rotation speed of the fan motor exceeds the set value of the upper limit rotation speed (a value that causes walls, etc. to vibrate if this rotation speed is exceeded), and if it exceeds,
In step 24, the "upper limit rotation speed over flag" is set to 1. If it has not been exceeded, the "upper limit rotation speed over flag" is set to O in step 25. After passing through step 24, proceed to step 26 and enter the “N
In this case, the timer time is the time during which the engine continues to rotate at a lower rotational speed, and when this timer is released, the rotational speed is controlled to return to the original rotational speed.

Thereafter, in step 27, the rotation speed down timer is incremented one by one. As a result, it is determined in step 28 whether the rotation speed down timer has reached 0, and if not, the "rotation speed down flag" is set to 1 in step 29. If the rotation speed down timer is O, in step 30 the rotation speed down flag J is set to 0.
If the previously set fan speed and the current set fan speed are the same, step 3! Proceed to ``Rotation speed down flag'' is 1.
→Determine whether it has reversed to 0. If it is reversed, the process proceeds to step 12; if not, the process proceeds to step 19.

If the data received by the remote controller 2 is OFF in step 10, the process proceeds to steps 32 to 35, where the energization to 5SR6 is turned off (stopped), the upper limit rotation speed over flag is set to 0, and the rotation speed down timer is turned off. and set the rotation speed down flag to 0.

According to this embodiment of the toothpick explained above, the fan motor control device has a rotation speed detection means D for detecting the rotation speed of the fan motor 5, and the rotation speed of the fan dryer 5 is set. When this value is exceeded, the rotation speed can be lowered in sequence, preventing vibrations from being transmitted to walls, etc.

The condition for returning the speed of the fan motor 5 which has been lowered by one speed to the original speed is when the n-minute timer is canceled or when the speed of the fan is changed using the remote controller 2.

〔Effect of the invention〕

As explained above, according to the present invention, when the rotation speed of the fan motor reaches the rotation speed (upper limit rotation speed) that causes vibration straddle due to vibration of the wall, etc., the rotation speed of the fan motor is lowered and This has the effect of making it possible to obtain an air conditioner control device that prevents the generation of vibration noise such as.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram of an air conditioner control device which is an embodiment of the present invention, Fig. 2 is a diagram showing a method of applying voltage to 5SR6 of Fig. 1, and Fig. 3 is an operation of this embodiment. 4 is a block diagram of a conventional fan motor control device, FIG. 5 is a diagram showing the operation of 5SR6 in FIG. 4, and FIG. 6 is a flowchart of a subroutine for controlling the fan motor of this conventional example. It is. A --- Remote control means B --- Signal receiving means C --- Control means D --- One rotation speed detection f-stage 1 --- Microcomputer 2 --- One difference Actuator 3 ----- One receiver A 5 ζ pin [ 4 --- AC power supply 5 --- Fan motor 6 --- 5 SR 8 --- Diode 11 --- Rotation speed detection end (Hall element) Note that the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] Remote control means for remotely changing the speed of a fan motor of an air conditioner; signal receiving means for receiving a signal from the remote control means; and control means for controlling the rotation speed of the fan motor. A control device for an air conditioner, comprising: a rotation speed detection means for detecting an upper limit rotation speed of a fan motor.