JPS63217161A - Operation control system for air direction control plate for air conditioner - Google Patents

Abstract

PURPOSE:To simplify the constitution for correction, by a method wherein a friction type transmission mechanism is situated between an electric motor and an air direction control plate and is brought into reliable contact with an upper and a lower stopper, and correction is performed on the basis of a contact position CONSTITUTION:A drive speed control means 19 of a CPU 9 outputs a lower or a high speed drive signal to a transmission means 18 according to the ON and OFF state of an air direction control operation switch SW to drive an air direction control plate through a driver 10, an electric motor 8, a reduction mechanism, and a friction type transmission mechanism. When an air direction control plate is driven and when it is displaced upward or downward, a drive output having the number of pulses higher than that during contact with the upper or the lower edge of the opening of a discharge port is inputted to the motor 8, and the air direction control plate is reliably situated in a full opening or a full closed position through the slip of the friction type transmission mechanism. A correction means 20 performs correction based on the contact position by means of a signal from the rotation position detecting means of the motor 8 so that the contact allows maintenance of respective positions.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention includes a blower that blows out temperature-controlled air, and a blower that is provided at the outlet of the temperature-controlled air so as to be able to swing up and down, thereby changing the blowing direction of the temperature-controlled air. an electric motor that drives the wind direction control board in response to a drive signal; and a wind direction control operation switch that causes the wind direction control board to continuously swing up and down in a reciprocating manner. The present invention relates to an operation control device for a wind direction control board.

(Prior art) As a conventional device of this kind, for example, Japanese Patent Application Laid-Open No. 61-1
75437, the electric motor (grill drive device) is driven by turning on the switch (Suita grill up/down switch) provided on the remote control device main body, and the electric motor (grill drive device) is operated according to heating and cooling. The wind direction control plate (outlet grille) is periodically driven up and down so as to sequentially assume a predetermined posture, such as from upward to horizontal to downward, or from downward to horizontal to upward. has been done.

(Problems to be solved by the invention) However, in the case of the conventional example having such a configuration,
For example, when the wind direction control board is driven to a specific position such as at the start of operation, or when it is to be reciprocated up and down over specific up and down positions, It is necessary to displace with high precision. Therefore, a limit switch is provided to operate when the wind direction control plate is displaced to the vertical swing limit position, etc. At the start of operation, etc., the state acting on the limit switch is used as the reference position and is appropriately corrected, and from there It is conceivable to displace it with high precision to a specific position, but this requires a limit switch and must be mounted with high precision, resulting in a complicated and expensive structure.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a simple and inexpensive configuration for correcting the wind direction control plate at the reference position.

(Means for Solving the Problems) In order to achieve such an object, the present invention provides the operation control device for the wind direction control board of an air conditioner described at the beginning, in which the electric motor (8) is replaced by a stepping motor. At the same time, the electric motor (8) and the wind direction control plate (7) are interlocked and connected via a friction type transmission mechanism, and the electric motor (8) and the wind direction control plate (7) are
) that sets the upper swing limit position of the wind direction control plate (7) by contact with the upper stopper (6a); and a lower stopper (6a) that sets the lower swing limit position of the wind direction control plate (7) with contact.
b), and the wind direction control plate (7) is connected to the upper stopper (
6a) or the lower stopper (6b), the correction means (20) outputs a drive pulse larger than the amount sufficient to displace the electric motor (8) to the contact position, respectively; and configure it.

(Function) According to the above configuration, the position where the wind direction control plate (7) abuts either the upper stopper (6a) or the lower stopper (6b) as the drive pulse is output by the correction means (20) After the contact is made, the electric motor (8) is driven while being caused to slip by the frictional transmission mechanism, and the contact state can be appropriately corrected to the reference position.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is a block diagram showing the configuration of an operation control device for a wind direction control plate of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the air conditioner.

In these figures, reference numeral 1 denotes an air conditioner main body, and the air conditioner main body 1 is equipped with a heat exchanger 2 and a blower 4 driven by a fan motor 3, and indoor air is supplied from a front grill 5. The temperature-controlled air is sucked in, heat exchanged through a heat exchanger 2, and the temperature-controlled air is blown out from an outlet 6.

A wind direction control plate 7 is provided on the air outlet 6 so as to be able to freely swing up and down, and the wind direction control plate 7 is equipped with an electric motor (
Stepping motor) 8 are interlocked and connected, and electric motor 8
As the airflow direction control plate 7 is driven, the airflow direction control plate 7 is moved back and forth, thereby changing the blowing direction of the temperature-controlled air.

The electric motor 8 is connected to the motor driver 1 by the CPU 9.
It is designed to be driven by outputting a drive signal to 0.

In Figure 1, 11 is a power system load such as a compressor, and CP
It is driven by outputting a drive signal from U9 to relay driver 12.

Further, 13 is a display section using a light emitting diode, and CP
The light emitting diode driver 14 is driven by outputting a drive signal from U9 to the light emitting diode driver 14.

An oscillator 15 is connected to the CPU 9 and inputs a basic cycle clock. In addition, CPU9 has
An external setting unit 16 for setting reference constants, method selection, etc., a wind direction control operation switch SW for continuously reciprocating and vertically swinging the wind direction control plate 7, an air conditioner operation switch, an operation mode changeover switch, and temperature settings. A remote control device 17 including a switch and the like is connected.

The CPU 9 includes a speed change means 18 and a drive speed control means 1.
9 and a correction means 20.

The electric motor 8 is configured in a four-phase energization system, and the oscillator 15 generates voltage waveforms as shown in the voltage waveform diagram of FIG. The low-speed drive signal is configured to be energized by a voltage with a predetermined period, and the unit period T0 is long by changing the unit period To. The speed change means 18 is configured to output a short high speed drive signal and change the drive speed of the electric motor 8 between a low speed drive state and a high speed drive state.

In the drive speed control means 19, when the wind direction control operation switch SW is on, the speed change means! When outputting a low-speed drive signal to 8 and drivingly displacing the wind direction control plate 7 to a specific position with the wind direction control operation switch SW in the OFF state, the speed change means 1
8 to output a high-speed drive signal.

A drive shaft (not shown) protruding from the transmission case 21 is connected to the wind direction control plate 7 so as to be integrally rotatable, and the motor shaft and the drive shaft of the electric motor 8 (not shown) are connected to each other by a worm gear type. It is interlocked and connected via a known speed reduction mechanism such as the above, and a known friction type transmission mechanism in which friction plates are pressed together. In addition, magnetic elements are attached to the motor shaft of the electric motor 8 at three locations spaced at predetermined intervals in the circumferential direction, and a Hall element is attached around the magnetic elements to measure the number of rotations of the motor shaft by the number of pulses. is configured to be detected by

When the wind direction control plate 7 is driven and displaced using these configurations, if it is displaced upward, it should be moved from the position where it abuts the upper opening edge 6a of the air outlet 6 (hereinafter referred to as the fully open position). A drive output with a sufficient number of pulses to displace the air outlet 6 upward is output, and when the air outlet 6 is displaced downward, the drive output is displaced downward from the position where it abuts the lower edge 6b of the opening of the air outlet 6 (hereinafter referred to as the fully open position). outputting a drive output with a sufficient number of pulses to reliably displace the wind direction control plate 7 to each of the fully open position and the fully closed position while avoiding seizure of the electric motor 8 due to slipping through the friction transmission mechanism, The correction means 20 is constructed so that the respective positions can be maintained by abutment.

Next, the aforementioned drive speed control means 19 and correction means 20
The control operation of the CPU 9 will be explained using the flowchart shown in FIG. 4 and the operation explanatory diagram shown in FIG. 5.

First, when the power is turned on or when the operation switch is turned off, the transmission means 18 outputs a high-speed drive signal (Sl) to drive the electric motor 8 at high speed, as shown in FIG. 5(a). Move to the fully closed position 6b side (S2
) and maintain it in its fully closed position 6b. At this time,
The correction means 20 applies a pulse number sufficient to displace the electric motor 8 by an angle θ+α which is larger than the angle θ required to displace the wind direction control plate 7 from the fully open position 6a to the fully closed position 6b by the set angle α. It outputs a drive output, waits for this drive output to be output (S3), and then determines whether the operation switch has been turned on (S4).

When the operation switch is turned on here, the gear change means I
8 outputs a high-speed drive signal (S5), and sets an angle range θ that is not affected by an increase in internal pressure caused by blowing out temperature-controlled air.
. (hereinafter referred to as normal angle θ)
While it is being displaced, it is driven and displaced at high speed toward the fully open position 6a (S6 and S7).

The normal angle θ mentioned above. When the wind direction control plate 7 is present within the fan motor 3, the fan motor 3 is driven in response to the fan motor 3, and the fan motor 3 is driven at the normal angle θ. When the wind direction control plate 7 is present outside, the output of the ventilation drive signal is stopped and the drive of the fan motor 3 is stopped.

Normal angle θ. After the wind direction control operation switch S
It is necessary to judge whether the wind direction control operation switch SW is turned on (S8), and if the wind direction control operation switch SW is not turned on, the switch is turned on as shown in Fig. 5 (b).
As shown in FIG. 5(C), the wind direction control plate 7 is driven and displaced in the high-speed driving state, and on the other hand, when the wind direction control operation switch SW is turned on, as shown in FIG. is output to switch to a low-speed drive state (S9), drive and displace the wind direction control plate 7 at a low speed, and then proceed to step S10, where it is determined whether the wind direction control operation switch SW is turned off or not. 5tO),
As the turning operation is performed, the driving of the electric motor 8 is stopped at that position (Sll) and the process returns to step S8. In other words, when adjusting the fixed position of the wind direction control plate 7, as shown in Fig. 5(e)
As shown in the figure, the wind direction control plate 7 can be easily stopped at a desired cutting operation position ST while being driven at a low speed.

Note that the normal angle θ. When a cutting operation is performed with the wind direction control plate 7 existing outside, the normal angle θ is set as shown in FIG. 5(d) regardless of the cutting operation position ST.
. It is designed to stop at the position where it has been displaced up to.

In step SIO, if the wind direction control operation switch SW is not operated in the ON state, that is, if it is maintained in the OFF state or ON state, the high speed in the OFF state is shown in FIG. 5(b). On the other hand, in the closed state, as shown in FIG. 5(c), the correcting means 20 outputs an extra drive pulse by the set angle -α to drive the wind direction control plate 7 to the fully open position 6a at a low speed. It is displaced (St2).

After that, in the heating operation state, turn on the wind direction control operation switch SW.
If it is turned off, the process moves from step S13 to step S14, where the drive of the wind direction control plate 7 is stopped, and as shown in FIG. S15.S16.517).

After that, or when the air conditioner is operating or the wind direction control operation switch SW is turned on, the process moves to step SI8, where it is determined whether the air direction control operation switch SW is turned on even in the cooling operation, and the wind direction control operation switch SW is turned on.
If W is on, the transmission means 18 outputs a low-speed drive signal 519), and as shown in FIG. and the fully open position 6a side to automatically move the wind direction control plate 7 vertically and continuously at low speed (S 20.S 21.S 22.S 23). .

In step S18, the wind direction control operation switch S
When it is determined that W is not engaged, the transmission means 18 outputs a high-speed drive signal (524), and as shown in FIG. 5(b), the drive is displaced to the first specific position I (predetermined angle θm) (S25) .826).

After being displaced to the first specific position I, it is determined whether or not the heating operation is in progress (527). 529) until the set time elapses, such as 5 minutes, or until the set temperature is reached. S30. S31,53
2) Do.

After the set time has elapsed or the set temperature has been reached, reset the timer (S33) and then switch to the fully open position 6a.
(S34), as shown in FIG. 5(b),
It is displaced to the first specific position 1 (S35) and then stopped (
S36).

When the air conditioner is in the cooling operation state, the process moves from step S27 to step S36, and without moving to the second specific position (■), it moves from the fully open position 6a to the first specific position 1 and stops, and returns to step S8. . The above-mentioned first specific position I is usually set at a position parallel to the blowing direction of the IA cooled air and does not create resistance to the blowing out of the temperature-controlled air, but the above-mentioned artificial cutting operation After the wind direction control plate 7 is stopped at a desired position, the stopped position is stored and becomes the first specific position I.

When the wind direction control board 7 is turned on, the normal angle is θ. Wind direction control operation switch S
When W is operated to enter, as shown in FIG. 5(f), the process moves from the entry operation position STA to step S8 to step SIO, step S12, step S+3, step 81B to step S23, and once returns to the fully open position. 6a side, and then alternately shifts to the fully closed position 6b side and the fully open position 6a side within the range of the first angle θ1 and the second angle θ, based on the fully open position 6a, and automatically The wind direction control plate 7 is continuously driven up and down at low speed.

In the embodiment described above, in order to displace the wind direction control plate 7 to the reference position and apply correction, the wind direction control plate 7 is mechanically abutted using the opening upper edge 6a and the opening lower edge 6b of the air outlet 6. Although the structure for the contact is simplified, in the present invention, for example, dedicated members may be attached, and these dedicated members or the upper edge 6a of the opening, etc., of the wind direction control plate 7 may be attached. The device that sets the upper swing limit position by contact is called an upper stopper 6a, and the lower swing limit position of the wind direction control plate 7 is set by contact with a special member, the lower edge 6b of the opening, etc. This is called the lower stopper 6b.

(Effects of the Invention) As described above, according to the present invention, a friction transmission mechanism is interposed between the electric motor (8) and the wind direction control plate (7) to output surplus drive pulses and Although the control plate (7) is simply constructed so as to be in reliable contact with the upper stopper (6a) or the lower stopper (6b), it can be corrected based on the contact position, making it easier to install a limit switch. The configuration for correction can now be made simple and inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an operation control device for a wind direction control plate of an air conditioner according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the air conditioner, and FIG. 3 is an electric motor drive FIG. 4 is a flowchart for explaining the control operation of the CPU, and FIG. 5 is a diagram for explaining the displacement operation of the wind direction control plate. 4... Air blower, 6... Air outlet, 6a... Upper edge of the opening of the outlet as an upper stopper, 6b... Lower edge of the opening of the outlet as a lower stopper, 7... Wind direction control Plate, 8... Electric motor, 20... Correction means.

Claims (1)

[Claims] (1) A blower (4) that blows out temperature-controlled air; and a wind direction control plate (7) that is swingably provided at the temperature-controlled air outlet (6) and that changes the blowing direction of the temperature-controlled air; An electric motor (8) that drives the wind direction control board (7) in response to a drive signal, and a wind direction control operation switch (SW) that continuously swings the wind direction control board (7) back and forth up and down. This is an operation control device for a wind direction control board of an air conditioner, in which the electric motor (8) is constituted by a stepping motor, and the electric motor (8) and the wind direction control board (7) are connected by a friction type transmission mechanism. an upper stopper (6a) which is interlocked and connected via the upper stopper (6a) and which sets the upper swing limit position of the wind direction control plate (7) by contacting the upper stopper (6a), which sets the lower swing limit position of the wind direction control plate (7). The lower stopper (6b) is set by contacting the wind direction control plate (7) with the upper stopper (6a) or the lower stopper (6b).
) a correction means (20) that outputs a drive pulse larger than the amount sufficient to displace the electric motor (8) to the contact position when the electric motor (8) is displaced so as to come into contact with the electric motor (8). Operation control device for wind direction control board.