JPH04369343A - Air-conditioner - Google Patents

Abstract

PURPOSE:To improve amenity of heating by a method wherein a constant airflow of hot air is spread over a floor. CONSTITUTION:An air conditioner comprises an angle detecting part 9 to detect the inclination angle of an air direction varying plate 5, a number of revolutions data storing part 11 to prestore a number of revolutions of motor data being the number of revolutions of a blower motor 7 responding to each inclination angle of the air direction varying plate 5 and keeping an airflow of an indoor blower 3 approximately at a constant value, and a fan motor control part 12 reading a number of revolutions of motor, responding to the angle of the air direction varying plate 5 detected from an output from the angle detecting part 9, from the number of revolutions data storing part 11 and driving and controlling the blower motor 7 by means of the read number of revolutions.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner that allows a constant amount of warm air to reach the floor surface regardless of the inclination angle of the wind direction changing plate.

0002

BACKGROUND OF THE INVENTION In an indoor unit of an air conditioner, cold or warm air is subjected to forced convection by an indoor fan after heat exchange with a heat exchanger. A rotatable wind direction changing plate is attached to the air outlet of the indoor unit, and the wind direction changing plate is used to adjust the blowing direction of cold air and warm air. On the other hand, to control the amount of cold air and warm air, the rotation speed of the fan motor is detected, this rotation speed is compared with a predetermined target rotation speed, and feedback is applied to correct the deviation. There are known devices that control the rotational speed of the motor to a constant value. Such air volume control is performed regardless of changes in the load on the fan motor.

0003

However, when the indoor fan motor is operated at a constant rotational speed as described above, the air volume and wind force substantially change depending on the inclination angle of the air direction changing plate. For example, when the wind direction changing plate 20 is set horizontally as shown in FIG. 6, and when the wind direction changing plate 20 is set horizontally as shown in FIG.
Compared to the case where 0 is set downward, when the wind direction changing plate 20 is facing downward, this acts as a resistance and both the air volume and wind force decrease.

Generally, as shown in FIG.
If 0 is horizontal, the hot air blown out will create a pool of warm air in the upper part of the living space.
During heating, the air direction changing plate 20 is directed downward as shown in FIG. 7. However, in this case, as the air volume and wind force have decreased as mentioned above, the warm air does not reach the floor due to the fact that the specific gravity is lighter, and the feet are still not warmed. This will cause inconvenience.

[0005] Therefore, the present invention solves the above-mentioned problems of the prior art, and by changing the rotation speed of the indoor fan motor in accordance with the inclination angle of the wind direction changing plate, a constant amount of hot air can be delivered to the floor surface. The purpose of the present invention is to provide an air conditioner that improves the comfort of heating by distributing the air throughout the room.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an angle detection unit for detecting the inclination angle of the wind direction changing plate, and a rotation of the blower motor corresponding to each inclination angle of the wind direction changing plate. A rotation speed data storage section that stores in advance motor rotation speed data that makes the air volume of the indoor blower almost constant, and a motor rotation speed that corresponds to the angle of the wind direction changing plate detected from the output of the angle detection section. The present invention is characterized in that it includes a fan motor control section that reads out the rotation speed data from the rotation speed data storage section and drives and controls the blower motor using the rotation speed.

[0007]

[Function] According to the present invention, even when heating is performed with the wind direction changing plate facing downward, the indoor blower rotates at a speed that maintains the air volume constant regardless of the tilt angle of the wind direction changing plate.
The warm air can reach the floor surface without decreasing its volume or force.

[0008]

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. In Figure 1,
Reference numeral 1 indicates an indoor unit of an air conditioner. This indoor unit 1 includes a heat exchanger 2 and a cross-flow type indoor fan 3 as a blower for forced convection of cold or hot air. Reference numeral 4 indicates an air outlet opening at the bottom of the indoor unit main body, and this air outlet 4 is used as a wind direction changing plate to adjust the direction of cold air or hot air blown out by the rotation of the indoor fan 3. A louver 5 is rotatably attached, and in this embodiment, the inclination angle of the louver 5 can be adjusted by manual operation, and the louver 5 is configured to be rotationally driven by a louver motor 6 and rotated by a predetermined angle.

Next, FIG. 2 is a diagram showing the configuration of a control section 8 that controls the drive of the louver motor 6 and the fan motor 7 of the indoor fan 3. An angle detection section 9 for detecting a louver angle (referred to as a louver angle) and an operation panel 10 are connected.

The control section 8 also includes a rotation speed data storage section 11 in which rotation speed data regarding the fan motor 7 is stored in advance such that the air volume is constant regardless of the louver angle of the louver 5, and A fan motor control unit 12 reads the rotation speed corresponding to the louver angle detected through the detection unit 9 from the rotation speed data storage unit 11 and controls the rotation of the fan motor 7 at this rotation speed, and the rotation of the louver motor 6. It is equipped with a louver motor control section 13 that controls the louver motor. Note that the louver motor control section 13 controls the rotation of the louver 5 to a desired louver angle based on the operation signal from the operation panel 10.

In this embodiment, the following rotation speed data is input in advance into the rotation speed data storage section 11. That is, as shown in FIG. 3, the louver angle is expressed by the angle between the louver 5 and the horizontal plane, and the rotation speed of the louver motor 6 is set with respect to this louver angle. In this case, louver 5
rotates by the louver angles β, γ, and the rotational speed of the louver motor 6 at this time is based on the predetermined rotational speed of the louver motor 6 when the louver angle α=0, and the air volume at this time is calculated for each louver angle α, β, The rotational speeds R1, R2, which are approximately constant at γ,
R3 is predetermined (see FIG. 4). In this case, as the louver angle increases, the air volume decreases due to the resistance from the louver 5, so in order to keep the air volume constant, the louver angle α,
The respective rotational speeds corresponding to β and γ are set to values that increase proportionally.

Next, after the heating operation has started, the control section 8
The specific operation will be explained with reference to the flowchart of FIG. First, in step S1, the inclination angle of the louver 5 is detected from the output signal of the angle detection section 9. The fan motor control unit 11 reads the rotation speed R of the indoor fan motor 7 corresponding to the louver angle detected at this time in step S2 from the rotation speed data storage unit 12, and in the subsequent step S3, the indoor fan motor 7 is rotated at this rotation speed R. A rotation speed control signal for driving the indoor fan motor 7 is output to the indoor fan motor 7.

Here, in FIG. 4, for example, when the louver angle γ is set, that is, the louver 5 is set close to vertical, the rotation speed R3 is higher than when the louver angle is α and close to horizontal. Since the indoor fan motor 7 is automatically operated and the air volume does not decrease at this time, the warm air is vigorously guided to the louver 5 and blown downward. Therefore, the warm air reliably reaches the floor surface, comfortably warming the feet, and effectively heating the entire room by the convection of the warm air.

[0014]

Effects of the Invention As is clear from the above description, according to the present invention, there is provided an angle detecting section for detecting the inclination angle of the wind direction changing plate, and a rotating speed of the blower motor corresponding to each inclination angle of the wind direction changing plate. A rotation speed data storage section that stores in advance motor rotation speed data that makes the air volume of the indoor blower almost constant, and a motor rotation speed that corresponds to the angle of the wind direction change plate detected from the output of the angle detection section. Since the fan motor controller is equipped with a fan motor control unit that reads out a number of rotations from a data storage unit and controls the blower motor using the rotation speed, hot air is blown out at a substantially constant volume regardless of the inclination of the wind direction changing plate. Therefore, even when the wind direction changing plate is directed downward and hot air is blown onto the floor surface, the entire room including the floor surface can be effectively heated.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an indoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a control unit provided in the air conditioner of the above embodiment.

FIG. 3 is an explanatory diagram showing the inclination angle of the wind direction changing plate of the indoor unit.

FIG. 4 is a graph showing the relationship between the inclination angle of the wind direction change plate and the air volume and rotation speed of the indoor blower.

FIG. 5 is a flowchart showing the operation of the control unit during heating operation.

FIG. 6 is an explanatory diagram schematically showing the heating state in a living space when the wind direction changing plate is horizontal in a conventional air conditioner.

FIG. 7 is an explanatory diagram schematically showing the heating state in a living space when the wind direction changing plate is vertical in a conventional air conditioner.

[Explanation of symbols]

1 Indoor unit 2 Indoor heat exchanger 3 Indoor fan 4 Air outlet 5　Wind direction change board 6 Grill motor 7 Fan motor 8 Control section 9 Angle detection section 10 Operation panel 11 Rotation speed data storage section 12 Fan motor control section 13 Grill motor control section

Claims (1)

[Claims] 1. An air conditioner equipped with an indoor blower with variable air volume and a rotatable wind direction changing plate, comprising: an angle detection unit for detecting a tilt angle of the wind direction changing plate; and each tilt angle of the wind direction changing plate. A rotation speed data storage section that stores in advance motor rotation speed data that corresponds to the rotation speed of the blower motor and makes the air volume of the indoor fan almost constant, and the angle of the wind direction change plate detected from the output of the angle detection section. An air conditioner characterized by comprising a fan motor control section that reads a corresponding motor rotation speed from the rotation speed data storage section and drives and controls a blower motor using the rotation speed.