JP2001082784A - Controller for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance comfortableness by processing detection signals of the oxygen concentration and the quantity of duct in the room air and then performing a series of control operations for supplying oxygen into a room. SOLUTION: An oxygen concentration detector 1 delivers a signal proportional to the oxygen concentration which is passed through an amplifier circuit 2 and an analog voltage is converted through an A/D converter circuit 3 into a digital value. A quantity of dust detector 4 delivers a signal proportional to the quantity of dust which is converted similarly into a digital value. A remote controller 14 inputs the data of the size of a room to a computer 13 where it is processed 7 to determine a target oxygen concentration A0 and a target quantity of dust B0 which are compared with actually detected oxygen concentration A1 and quantity of dust B1. If A0>A1 or B0<B1, the computer 13 operates 7 the opening of an expansion valve 9 and the operating time of a ventilation fan 11 and controls drive circuits 8, 10 for expansion valve and a ventilation fan.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects an oxygen concentration and a dust amount in a room, supplies oxygen to the room based on the detected value of the oxygen concentration and the detected value of the dust amount, and discharges dirty air in the room. The present invention relates to a method for controlling an air conditioner to be controlled.

[0002]

2. Description of the Related Art As a prior art, there has been one disclosed in Japanese Patent Publication No. Hei 4-190032. This publication detects the concentration of carbon dioxide and the amount of dust in a room, and controls the amount of outside air introduced based on the detected concentration and amount of dust.

[0003]

However, in the conventional air conditioner, since outside air is introduced, if the outside air is dirty, the indoor air is also dirty. Further, since the concentration of carbon dioxide is detected, it is difficult to directly determine the amount of oxygen required in the room.

SUMMARY OF THE INVENTION The object of the present invention is to address the above-mentioned conventional problems, detect the oxygen concentration in the indoor air and the amount of dust in the indoor air, supply oxygen from the oxygen tank into the room, and remove the dirty air from the room. It discharges and improves indoor comfort.

[0005]

SUMMARY OF THE INVENTION The present invention detects the concentration of oxygen contained in room air and the amount of dust in room air.
Achieved by providing a means for processing the detected signal, a means for supplying oxygen to the room, a means for discharging dirty air in the room, and a means for turning on / off the series of controls. can do.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the block diagram of FIG.

[0007] A signal proportional to the oxygen concentration is extracted by the oxygen concentration detector 1, amplified by the amplifier circuit 2, and converted by the A / D converter circuit 3 from an analog voltage to a digital value.

Further, a signal proportional to the amount of dust is taken out by the dust amount detector 4 and amplified by the amplifier circuit 5, and A / A
The analog voltage is converted into a digital value by the D conversion circuit 6.

The A / D conversion circuits 3 and 6 may be built in the microcomputer 13.

[0010] The size of the room in the room is previously input by the remote controller 14 and transmitted. The data is received by the indoor unit, and the target oxygen concentration A0 and dust amount B are calculated by the arithmetic processing 7 in the microcomputer 13 from the data of the size of the room.
0, the actual oxygen concentration detector 1 and the dust amount detector 4
The oxygen concentration A1 and the dust amount B1 obtained by the above are compared.

When the oxygen concentration A0> the oxygen concentration A1 or the dust amount B0 <the dust amount B1, the expansion valve is driven by the operation processing 7 in the microcomputer 13 and based on the calculated expansion valve opening and ventilation fan operation time. The circuit 8 and the ventilation fan drive circuit 10 are controlled. Here, the expansion valve 9 is attached to a flow path of a pipe that supplies oxygen from the oxygen tank to the room, and controls the amount of oxygen to the room by the degree of opening of the expansion valve. The ventilation fan discharges dirty air in the room to the outside of the room, and the amount of discharge can be controlled by the operation time of the ventilation fan.

As one of the control methods, the oxygen concentration can be set in advance by the remote controller 14, and the opening degree of the expansion valve and the operation time of the ventilation fan can be controlled so as to reach the set oxygen concentration.

The control start SW12 turns ON / OFF this control.
This control can be turned off, and this control can be invalidated. This control SW may be attached to an indoor unit or to a remote controller.

FIG. 2A is a graph of oxygen concentration-voltage obtained by the oxygen concentration detector 1. (2) is a graph of voltage-expansion valve opening obtained by arithmetic processing 7;

FIG. 3C is a graph showing the relationship between the dust amount and the voltage obtained by the dust amount detector 4.

(4) is a graph of the voltage-ventilation fan operating time obtained by the arithmetic processing 7.

According to the graphs (1) and (2), when the oxygen concentration in the room is high, the opening degree of the expansion valve is reduced to reduce the oxygen supply amount. Conversely, if the oxygen concentration is low, the degree of opening of the expansion valve is increased to increase the oxygen supply amount. From the graphs of (3) and (4), if the amount of dust is large, the operation time of the ventilation fan is lengthened to increase the amount of air discharged from the room to the outside. Conversely, if the amount of dust is small, the operation time of the ventilation fan is shortened to reduce the amount of air discharged from the room to the outside.

The graphs (1) and (3) show the relationship between the oxygen concentration and the voltage and the relationship between the dust amount and the voltage, but other parameters (current, resistance, etc.) may be used instead of the voltage. . That is, the parameters vary depending on the output values of the oxygen concentration detector and the dust amount detector used.

In the above-described embodiment, the dust amount detector that outputs an analog operation output is used. However, a dust detector that outputs a digital operation output (ON / OFF) may be used.

[0020]

As described above, according to the present invention,
Compared to the method that controls the intake of outside air to reduce the amount of dust in the room, oxygen is supplied to the room by the oxygen tank and the contaminated air in the room is discharged outside the room, so the oxygen concentration in the room air is constant. , And the amount of indoor dust can be suppressed to a certain value or less, and there is a merit of improving indoor comfort.

[Brief description of the drawings]

FIG. 1 is a block diagram of controlling oxygen concentration and dust amount according to the present invention.

FIG. 2 is a characteristic diagram showing performance characteristics of the ventilation fan according to FIG. 1 depending on operating time;

[Explanation of symbols]

1: oxygen concentration detector, 2, 5: amplifier circuit, 3, 6: A /
D converter, 4 dust detector, 7 arithmetic processing, 8 expansion valve drive circuit, 9 expansion valve, 10 ventilation fan drive circuit, 11 ventilation fan, 12 control start SW, 13 microcomputer , 14 remote controller, 15 receiving circuit.

Claims (1)

[Claims] In the control of an air conditioner, the concentration of oxygen contained in indoor air and the amount of dust in indoor air are detected, means for processing the detected signal, and supply of oxygen to the room. A control device for an air conditioner, comprising: means, means for discharging dirty air in a room, and means for turning on / off the series of controls.