JPH1026387A - Method for controlling air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain stabilized amount of ventilation by a method wherein the number of rotation of an indoor fan is increased when an airflow direction regulating plate is set at a horizontal direction or a vertical direction. SOLUTION: When cooling operation or heating operation is started, two pieces of airflow direction regulating plates are pivoted and retained at a reference position (position whereat a ventilating resistance is minimized) or another position, newly selected and set by a remote controller (ST1). The airflow direction regulating plates are decided from the number of steps upon pivoting a stepping motor whether the plates are set horizontally or vertically (ST2). When the plates are set at a direction except horizontal or vertical directions, a ventilating fan 7 is operated with a set number of rotation (ST3). When the airflow direction regulating plates are decided that they are set at horizontal or vertical direction (ST2), the number of rotation of the indoor fan 7 is increased compared with the set number of rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for controlling an air conditioner.

[0002]

2. Description of the Related Art On the indoor unit side of an air conditioner, an air filter, an indoor heat exchanger, and an indoor fan are provided in an air passage connecting an intake port and an air outlet formed in a main body of the air conditioner. A wind direction adjustment plate powered by a power source is provided, and the wind direction adjustment plate is operated by remote control from the diagonal direction to the horizontal direction during cooling operation and dry operation, and from the diagonal direction to the vertical direction during heating operation. The direction can be adjusted. Also, the air volume can be set by remote control operation, and the indoor unit control unit that receives the remote control signal performs feedback control based on the set air volume so that the fan motor, which is the power source of the indoor fan, has a predetermined rotation speed. It has become. In the conventional air conditioner, the rotation speed of the fan motor is controlled to be constant even if the position of the wind direction adjusting plate is changed after the air volume is set.

[0003]

However, if the above-mentioned wind direction adjusting plate is set in the horizontal direction (during the cooling operation) or vertically (during the heating operation), the blowing resistance increases and the blowing amount decreases. During the cooling operation, there is a problem that the inside of the air outlet is easily dewed, and the condensing pressure increases during the heating operation, and the operating current increases due to the influence. Therefore,
In view of these problems, an object of the present invention is to provide a control method of an air conditioner that can obtain a stable air flow even when a wind direction adjusting plate is set in a horizontal direction or a vertical direction.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and comprises an indoor heat exchanger and an indoor fan arranged in an air passage formed in a main body and connecting an inlet and an outlet. An air conditioner provided at the outlet with a wind direction adjusting plate for adjusting a wind direction into a room, wherein the wind direction adjusting plate can be adjusted in a plurality of directions from a horizontal direction to a vertical direction by remote control operation. When the adjusting plate is set in the horizontal direction or the vertical direction, the rotation speed of the indoor fan is increased by a predetermined number with respect to the set rotation speed.

[0005]

According to the control method of the present invention, it is determined by the indoor unit control section when the air direction adjusting plate is set in the horizontal direction or the vertical direction to reduce the air flow during the cooling and dry operation or the heating operation. As a result, the number of rotations of the indoor fan is increased by a predetermined number with respect to the set value, so that approximately the same amount of air can be obtained as in the case where the wind direction adjusting plate is set in the same oblique direction as the outlet. Thus, it is possible to prevent the dew condensation during the cooling operation and the rise in the condensing temperature during the heating operation, which are problems.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a schematic configuration of an indoor unit of an air conditioner, wherein 1 is a main body, 2 is a suction port formed in the main body 1, 3 is an outlet, 4 is air connecting the inlet 2 and the outlet. The air passage 4 includes an air filter 5, an indoor heat exchanger 6 divided into three parts, and an indoor fan 7 that sends out the air heat exchanged by the indoor heat exchanger 6 to the outlet 3. The air outlet 3 is provided with two wind direction adjusting plates 8 and 9 for vertically adjusting the wind direction into the room.

As shown in FIG. 2, these two wind direction adjusting plates 8 and 9 have different adjusting ranges depending on the operation mode. During cooling and dry operation, the air direction adjusting plates 8 and 9 have a horizontal direction (a), a slight inclination (b) and an inclination (c). In the heating operation, three directions can be adjusted in the vertical direction (d), the steep slope (e), and the slope (f). These adjustments can be performed by the remote controller 10 as shown in FIG. You can select and instruct
The indoor unit control section 11, which has received the remote control signal, controls the stepping motor 12, which is a power source for the wind direction adjusting plate, so as to rotate and hold the wind direction adjusting plates 8, 9 in a predetermined direction. The indoor unit control unit 11 compares the information on the rotation speed of the fan motor 14 obtained from the rotation speed detection element 13 with the storage information (set rotation speed corresponding to the set airflow) corresponding to the set airflow while comparing the fan motor 14. Feedback control.

Further, in this embodiment, in addition to the above control function, the wind direction adjusting plates 8 and 9 are set in a horizontal direction as shown in FIG. 2A or a vertical direction as shown in FIG. 2D. Then, the indoor unit controller 11 increases the number of revolutions of the fan motor 14 which is the power source of the indoor fan 7, thereby increasing the air flow. Hereinafter, the control operation will be described with reference to the flowchart shown in FIG.

When the cooling operation or the heating operation is started,
In step ST1, the two wind direction adjusting plates 8 and 9 are moved to a reference position (a position where the blowing resistance is minimized) as shown in FIG. Rotate and hold in position. In step ST2, it is determined whether or not the wind direction adjusting plates 8, 9 are horizontal or vertical based on the number of steps when the stepping motor 12 is rotated. Proceeding to ST3, the blower fan 7 is operated at the set rotation speed, and the process proceeds to the next step ST4.
When it is determined that 9 is horizontal or vertical, the process proceeds to step ST5, and the rotation speed of the indoor fan 7 is increased by, for example, 50 rotations as compared with the set rotation speed. Step ST
In step 4, it is determined whether or not the positions of the wind direction adjusting plates 8 and 9 have changed, and if there has been a change in position, the process returns to step ST2, and the operation described above is repeated.

In this embodiment, the rotation speed of the indoor fan 7 is increased only when the wind direction adjusting plates 8 and 9 are set horizontally or vertically. However, the method is limited to this method. Instead, for example, wind direction adjusting plates 8 and 9
Is set to the position shown in FIG. 2 (c) or (f), the fan motor 14 is operated at a predetermined rotation speed, and the wind direction adjusting plates 8, 9 are moved to the positions shown in FIG. 2 (b) or (e). When the fan motor 14 is set to the position, the rotation speed of the fan motor 14 is increased by, for example, 20 rotations. When the wind direction adjusting plates 8 and 9 are set to the positions shown in FIGS. The operation may be performed by further increasing the number of rotations by 30.

[0011]

According to the air conditioner having the control function as described above, if the wind direction adjusting plate is set in the horizontal direction or the vertical direction where the blowing resistance becomes large, the rotation speed of the blowing fan is increased. To prevent a decrease in air flow, thereby preventing condensation during cooling operation and preventing a rise in condensing pressure during heating operation.A stable air volume can always be obtained regardless of the direction of the wind direction adjustment plate. This also improves comfort.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a schematic configuration on an indoor unit side of an air conditioner according to the present invention.

FIG. 2 is a sectional side view of a main part showing an adjustment position of a wind direction adjustment plate according to the present invention.

FIG. 3 is a block diagram schematically showing a control system according to the present invention.

FIG. 4 is a flowchart illustrating a control operation example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Inlet 3 Outlet 4 Air passage 5 Air filter 6 Indoor heat exchanger 7 Indoor fan 8 Wind direction adjustment plate 9 Wind direction adjustment plate 10 Remote controller 11 Indoor unit control unit 12 Stepping motor for wind direction adjustment plate 13 Fan motor rotation speed Detector 14 Fan motor

Claims (2)

[Claims] 1. An indoor heat exchanger and an indoor fan are provided in an air passage connecting a suction port and an air outlet formed in a main body, and a wind direction adjusting plate for adjusting a wind direction into a room is provided in the air outlet. In an air conditioner in which the wind direction adjusting plate can be adjusted in a plurality of directions from a horizontal direction to a vertical direction by remote control operation, when the wind direction adjusting plate is set in a horizontal direction or a vertical direction, the number of rotations of the indoor fan is increased. A method for controlling an air conditioner, wherein a predetermined number is increased with respect to a set number of revolutions. 2. A state where the wind direction adjusting plate is inclined substantially in the same direction as the air outlet is set as a reference position, and when the wind direction adjusting plate is set in a direction different from the reference position, the direction corresponds to the set direction. The control method for an air conditioner according to claim 1, wherein the number of rotations of the indoor fan is increased.