JPH06257823A - Air conditioner - Google Patents

Abstract

PURPOSE:To prevent an angle of blowing of a louver caused by a disturbance of rotational speed of a louver motor from being entirely ununiformed at each of entire blowing ports. CONSTITUTION:There are provide louver angle sensing means 18, 18a for sensing a rotational position of each of louvers 15, 15a at a blowing port of each of indoor devices NO and 10a; and louver motor control means 23, 23a for stopping a rotation of each of louver motors 21, 21a in response to an output of the louver angle sensing means and controlling a stopping and a starting of each of the louver motors 21, 21a in the same cycle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to an air conditioner in which the blowing angles of a plurality of indoor units or the louvers of a plurality of blowing ports can be adjusted to be the same.

[0002]

2. Description of the Related Art Generally, in an indoor unit of an air conditioner, the louver angle of a blower outlet can be adjusted to change the direction of the blown air depending on the room temperature or in any direction. As a rotary drive source for this type of louver, a geared motor in which a motor and a gear type speed reducing unit are integrally combined is generally used. This geared motor is
There is an advantage that a characteristic for a specific purpose can be easily obtained by combining various kinds of motors and reduction gears, and it is suitable for driving a louver of an indoor unit that requires very low speed rotation.

[0003]

However, among the air conditioners, an air conditioner having a plurality of indoor units installed in the same compartment, or a plurality of outlets provided in different directions with respect to one indoor unit. However, in some gearmotors, the rotational speeds of the individual motors may slightly differ due to transmission errors of gears in the reduction gears. Here, FIG. 5 temporally shows the phase shift of the louver angle when a motor having an error in rotation speed is used. When a motor with such a difference in rotation speed is installed, if the indoor unit is used for a long time, there will be a slight deviation in the blowing angle of the louver for each indoor unit installed even in the same room. It gets bigger. For this reason, there has been a problem that the blowing angles of the louvers are scattered and the cooling and heating efficiency is reduced.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and even if the louver motor is not highly accurate and has uneven rotation, the blowing angle of the louver is not uniform among the indoor units. It is to provide an air conditioner that does not become

[0005]

To achieve the above object, according to the present invention, the louvers provided at the outlet of the indoor unit have a variable rotation angle, and a plurality of the indoor units are installed in the same compartment. In the air conditioner, the louver angle detecting means for detecting the rotational position of the louver at the outlet of each indoor unit, and the rotation of the louver motor is stopped at every predetermined rotation of the louver based on the output of the louver angle detecting means. At the same time, louver motor control means for controlling the stop and start of each louver motor in the same cycle is provided.

In order to achieve the above object, the present invention is an air conditioner in which a plurality of outlets are provided in an indoor unit, and the rotation angle of the louver of each outlet is variable. The louver angle detecting means for detecting the rotational position of the louver, and the rotation of the louver motor is stopped at every predetermined rotation of the louver based on the output of the louver angle detecting means, and each louver motor is stopped and started in the same cycle. The louver motor control means for controlling is provided.

[0007]

According to the present invention, the number of rotations of the louver is detected by the respective louver detecting means, and the louver stops when the louver rotates by a predetermined rotation. in this case,
The stop and start cycles of the louver motor that rotationally drives each louver are set to be the same. Therefore, even if there is a deviation in the rotation speed of each louver motor, the rotation is restarted at the same time after a predetermined time has passed for each louver, so that the deviation of the phase of the louver angle is prevented from increasing. be able to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the configuration of a control system for an embodiment in which the present invention is applied to an air conditioner in which two indoor units are installed in the same room, and FIG. 2 is a diagram showing the structure of the indoor unit. Reference numeral 10 is a wall-mounted indoor unit as shown in FIG. 2, and an outlet 12 is formed below the front of a panel 11 of the indoor unit 10. Therefore, the air cooled (heated) by heat exchange with the indoor heat exchanger 13 is blown out toward the room from the blowout port 12 by the rotation of the blower 14. A louver 15 for adjusting the wind direction is rotatably incorporated into the outlet 12 of the indoor unit 10 via a rotary shaft 16.

FIG. 3 shows a limit switch 18 and a louver 15 which constitute means for detecting the rotational position of the louver 15.
It is a figure showing the positional relationship with. This louver 15
One rotation is made from this position with the rotation position shown by the solid line in the figure as the top dead center. Since the limit switch 18 is installed at a position where its contactor comes into contact with the louver 15 at its top dead center, one rotation of the louver 15 is detected by the limit switch 18.

Next, referring to FIG. 1, the indoor unit 10 is provided with a blower motor 20 and a louver motor 21. The blower motor 20 is controlled by a control unit 22 incorporating a microprocessor. Louver motor 2
A geared motor is used as 1, and a louver motor control circuit 23 is connected to the louver motor 21. The limit switch 18 is connected to the louver motor control circuit 23. When the top dead center detection signal of the louver 15 is input from the limit switch 18 to the louver motor control circuit 23, the rotation of the louver motor 21 is stopped and After a predetermined time has passed, the louver motor 21 is activated to rotate the louver again.

The indoor units 10 and 10 are respectively the outdoor unit 19
And the indoor unit 1 connected in parallel via a power line 25.
Signal transmission between the control units of 0 and the outdoor unit 19 is performed via a serial line 24.
Although the constituent elements of both indoor units 10 and 10 are configured in the same manner, the constituent elements of the other indoor unit 10 are denoted by the same reference numerals and a and detailed description thereof is omitted.

The general operation of the air conditioner is operated by the remote control type operation panel 26. The operation panel 26 includes various switches for setting the operating state of the air conditioner, a microprocessor 27, and a louver switch 2.
8 is incorporated. The louver switch 28 allows the louver motor 21 to be manually started and stopped.

Next, the operation of this embodiment will be described with reference to the time chart of FIG. First, regarding the change over time of the louver angle representing the rotational position of the louver 15, the change in the louver angle of the indoor unit 10 is shown by the broken line curve A, and the change in the louver angle of the other indoor unit 10a is shown by the solid line curve B. Here, it is assumed that the louver motor 21 of the indoor unit 10 originally has a slightly lower rotation speed than the louver motor 21a of the indoor unit 10a. First, the operation of the air conditioner is started, and the louver motors 21 and 21a are
When is turned on, the louvers 15 and 15a are set to a predetermined louver angle according to the room temperature at that time, and the louver angle is adjusted by the manual operation of the control panel 26. Increase with.
Eventually, if the louver 15 with the higher motor rotation speed makes only one rotation with the lapse of the operating time, at this time, the louver 15 will reach the limit switch 18 at its top dead center.
Contact with. Therefore, the detection signal is output to the louver motor control circuit 23, and the louver motor control circuit 23 turns off the louver motor 21 (time t.
1). As a result, the louver motor 21 is stopped. After that, the louver motor 21 is restarted with the other louver motor 21a having a slow rotation speed stopped and the time T obtained by adding the reset time to the louver motor 21a as one cycle.

On the other hand, the other louver motor 21a has a slow rotation speed, so that a lag phase occurs in the louver angle. Therefore, the limit switch 18a detects that the louver 15a, which is rotating faster, makes one rotation and stops, and the louver motor 21a stops at this time.

Thereafter, the louver motor 21a is rotated again after a lapse of a predetermined time, for example, 1 to 3 seconds (time t3). In this case, the louver 15
The cycle time of one rotation of a is the other louver 15
Needless to say, the time T is set to be the same as the cycle time of the rotation.

Therefore, since the louvers 15 and 15a rotate in the same rotation cycle, both louvers 15 and 15a always rotate simultaneously from the start of the next cycle. For this reason, the phase of the louver angle due to the uneven rotation of the louver motor is increased, and the wind directions of the warm air and the cold air are prevented from becoming different for each indoor unit, and a comfortable and efficient cooling / heating operation can be performed. .

In the above, the case where each louver is stopped and rotated in the same cycle for each one rotation of the louver has been described, but the present invention is not limited to this, and the rotation of the louver. Count the number of times,
It is also possible to stop the louver with a predetermined number of rotations as one cycle.

Although the embodiment in which the present invention is applied to the air conditioner in which two indoor units are installed in the same room has been described above, the same configuration can be applied when two or more indoor units are installed. it can. There is one indoor unit and two outlets.
In the case of a so-called ceiling cassette type indoor unit having a plurality of directional, three-directional or four-directional directions, the same control as in the above-described embodiment is performed for each louver motor that rotates the louver of each outlet. By doing so, it is possible to prevent variations in the angle of the louvers of each blowout, and to make the blowout directions uniform.

[0019]

As is apparent from the above description, according to the present invention, the rotational position of each louver is detected and the louver motor is controlled to rotate in the same cycle for stopping and starting. Therefore, even if there is a deviation in the rotational speed of each louver motor, the rotational position of the starting point of each louver will always rotate in unison, so it is possible to prevent variations in the orientation of the louvers at multiple outlets. It is possible to perform efficient cooling / heating operation.

[Brief description of drawings]

FIG. 1 is a wiring diagram of a control system of an indoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of an indoor unit of an air conditioner according to an embodiment.

FIG. 3 is an explanatory diagram showing a positional relationship between a louver and a detector that detects a rotational position of the louver in the indoor unit.

FIG. 4 is a time chart showing the correspondence between the louver angle temporal change and the louver motor on / off, showing the operation of the embodiment.

FIG. 5 is a graph showing a temporal change of a louver angle in a conventional air conditioner indoor unit.

[Explanation of symbols]

 10 Indoor Unit 11 Panel 12 Outlet 13 Indoor Heat Exchanger 14 Blower 15 Louver 18 Limit Switch 19 Outdoor Unit 20 Blower Motor 21 Louver Motor 22 Controller 23 Louver Motor Control Circuit 24 Serial Line 25 Power Line 26 Operation Panel 28 Louver Switch

Claims (2)

[Claims] 1. An air conditioner in which a rotation angle of a louver provided at an outlet of an indoor unit is variable and a plurality of the indoor units are installed in the same compartment, wherein a louver at the outlet of each indoor unit is provided. Angle detecting means for detecting the rotational position of the louver, and the rotation of the louver motor is stopped at every predetermined rotation of the louver based on the output of the louver angle detecting means, and the stop and start of each louver motor are controlled in the same cycle. An air conditioner comprising: a louver motor control means. 2. An air conditioner in which a plurality of outlets are provided in an indoor unit and the rotation angle of the louver of each outlet is variable, and louver angle detecting means for detecting the rotational position of the louver of the outlet of each indoor unit. And a louver motor control means for stopping the rotation of the louver motor at every predetermined rotation of the louver based on the output of the louver angle detection means, and controlling the stop and start of each louver motor in the same cycle. A characteristic air conditioner.