JPH07158938A - Controller for steam type humidifier - Google Patents

Abstract

PURPOSE:To reduce the cost of a controller for a steam type humidifier, make the handling of the same simple and further eliminate irregularity in sensors by using a temperature sensor for detecting indoor moisture. CONSTITUTION:Each resistance change of a temperature sensor A8, to which water from a water absorbing device is applied, and a temperature sensor B5 disposed at an external air inlet port, through which the external air is taken in, is converted into a voltage by resistors 30, 29, connected in series to the temperature sensors A8 and B5, respectively. The voltage thus obtained is inputted into circuits connected in series to the temperature sensors A8 and B5, respectively, and further inputted into analog/digital ports (hereinafter called A/D ports) I2, I3, of a microcomputer 32 connected in parallel to the circuits to be converted into a temperature. Temperature differences between the temperature sensors A8 and B5 are found out by the microcomputer 32, and an operation formula is set on the basis of the differences to calculate moisture, thus controlling a heater 7 and a motor fan 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam humidifier control device used in general households.

[0002]

2. Description of the Related Art A conventional steam humidifier control device applies a DC voltage to both ends of a series circuit of a temperature detecting sensor and a resistor, as known from Japanese Utility Model Publication No. 59-26190. A temperature detection circuit that outputs a temperature detection signal corresponding to the deviation between the DC voltage generated at the mutual junction point of the temperature detection sensor and the resistance and the reference voltage, and an AC voltage is applied across the series circuit of the humidity sensor and the resistance. , A humidity detection circuit for directly converting the AC voltage generated at the mutual junction point of the humidity sensor and the resistor into a voltage and outputting a humidity detection signal, and a constant output based on the temperature detection signal and the humidity detection signal A control circuit that controls the output of an arithmetic circuit is used to detect indoor humidity. Type sensor has been commonly used.

This sensor required a low voltage AC power source to operate in an electronic circuit.

[0004]

The polymer type sensor is
When used, it is very difficult to handle and it is often difficult to maintain the performance.

Further, the polymer type sensor is very expensive, and the cost is high because an AC power source is required to operate it in an electronic circuit.

Further, there is a large variation among the individual sensors, which requires sorting and adjustment and is extremely poor in productivity.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a water tray for storing a fixed amount of water in a main body case and an evaporator for evaporating water accumulated by heating a heater. The plate, the motor fan that discharges the vapor evaporated from the evaporation plate, the temperature detection sensor B that is arranged at the outside air intake port provided in a part of the main body case as a detection unit that detects the atmospheric humidity, and the water receiving plate through a different path. A water absorption plate for storing a certain amount of water was provided with another temperature detection sensor A equipped with a water absorption device for sucking the water in the water absorption plate.

Further, a commercial power source is used as a power source, and a series circuit of the motor fan and a photothyristor for controlling the motor fan is connected in parallel to the commercial power source, and the heater and a relay for controlling the heater are connected in series. A temperature detection sensor B for detecting the temperature inside the room at a power supply V2 of a constant voltage generation circuit connected in parallel with the commercial power supply, the circuits being connected in parallel;
A temperature detecting sensor A equipped with a water absorbing device is connected to the power source V2 of the constant voltage generating circuit, and an operating humidity setting means for starting and stopping the operation and setting a desired humidity is connected to the heater and the motor. The microcomputer is equipped with a program for operating the fan and calculating the relative humidity from the two temperature changes of the temperature detection sensor B and the temperature detection sensor A. The microcomputer is used as the temperature detection sensor B, the temperature detection sensor A and the operating humidity setting means. Connected.

[0009]

According to the present invention having the above-described structure, when the driving operation is carried out by the driving humidity setting means and a driving signal is inputted from the input port of the microcomputer, a signal is outputted from the output port of the microcomputer and is transmitted through the transistor. It drives the thyristor and operates the fan motor. The fan motor operates until the operating humidity means is stopped.

A resistance change detected by the temperature detection sensor B is converted into a voltage by a resistance, and is input to an analog-digital port (hereinafter referred to as A / D port) of a microcomputer to be converted into a temperature.

Further, the resistance change detected by the temperature detection sensor A is converted into a voltage by the resistance and input to the A / D port of the microcomputer to be converted into temperature.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, the structure of the steam humidifier will be described with reference to FIG.

Reference numeral 1 denotes a main body case which constitutes an outer shell. Two
Is a water tank, which is stored in the main body case 1.

Reference numeral 12 is a push-up rod for pushing up the tank lid of the water tank 2. When the center portion of the lid of the water tank 2 is pushed up by the push-up rod 12, the water in the water tank 2 falls and the water tray Water is collected in 3.

The water in the water receiving tray 3 is connected to the evaporating tray 6 so as to communicate with the upper portion of the water receiving tray 3, and the water in the water receiving tray 3 supplies the water to the evaporating tray 6.

A heater 7 is arranged on the evaporation dish 6, and the water supplied to the evaporation dish 6 is heated by the heater 7.

A motor fan 9 rotated by a motor is provided in the vicinity of the evaporation tray 6 having the heater 7, and the evaporation tray 6 is provided.
The steam (water) vaporized in (1) is discharged into the room through the jet port 13 opening in a part of the main body case 1.

Reference numeral 5 denotes a temperature detecting sensor B, which is arranged in the main body case 1 and above a water supply tray 11 provided in a separate path so as to communicate with the water receiving tray 3.

Reference numeral 8 is a temperature detecting sensor A for detecting the humidity in the room, and is equipped with a water absorbing device 10 for adhering water to the temperature sensor A8.

Reference numeral 4 denotes an outside air suction port provided to the temperature detecting sensor A8 and the temperature detecting sensor B5 to take in outside air for detecting an accurate temperature, and is provided in a part of the main body case 1.

Reference numeral 14 is a control board for taking in signals from the temperature detecting sensor A8 and the temperature detecting sensor B5 and controlling and operating the heater 7 and the motor fan 9.

Next, the circuit of the control board 14 is shown in FIG.
And it demonstrates with reference to FIG.

Reference numeral 21 denotes a commercial power source, and the commercial power source 21
And one end of the motor fan 9 and a semiconductor for operating the motor fan 9, which is connected in series with a light receiving portion 22a of a photothyristor that operates by light, are connected in parallel, and the heater 7 and a relay 23a for operating the heater 7 are connected in series. The connected components are connected in parallel, and the constant voltage generating circuit 26 is connected in parallel.

A temperature detection sensor B5 and a temperature detection sensor A for detecting indoor humidity are supplied to the power source V2 of the constant voltage generation circuit 26.
8 is connected, and the GND of the constant voltage generating circuit 26 is connected to each of the above via a resistor 29 and a resistor 30.

Further, the operating humidity setting means 31 (not shown in the configuration diagram of FIG. 1) is connected in parallel to the temperature detecting sensor B5 and the temperature detecting sensor A8. Furthermore, the microcomputer 32
Are connected in parallel.

The connection point between the temperature detection sensor B5 and the resistor 29 is connected to the input port I3 of the microcomputer 32, and the connection point between the temperature detection sensor A8 and the resistor 30 is connected to the input port I2 of the microcomputer 32 and the output of the operating humidity setting means 31. The end is the microcomputer 3
2 is connected to the input port I1.

The light source 22b of the photothyristor and the coil portion 23b of the relay are connected to the power source V1 of the constant voltage generating circuit 26, respectively. The other end of the light emitting portion 22b of the photothyristor is connected to the collector end of the transistor 35, and the base end of the transistor 35 is connected to the output port O of the microcomputer 32.
1 and the emitter end of the transistor 35 is connected to the ground (GND).

The other end of the coil portion 23b of the relay is connected to the collector end of the transistor 36,
The base end of is connected to the output port O2 of the microcomputer 32,
The emitter end of the transistor 36 is connected to the ground (GND).

Next, the operation of the above configuration will be described.

Now, when a driving operation is performed by the operating humidity setting means 31 and a driving signal is inputted from the input port I1 of the microcomputer 32, a signal is outputted from the output port O1 of the microcomputer 32 and the photothyristor 22a via the transistor 35.
To drive the fan motor 9. The fan motor 9 operates until the operating humidity means 31 is stopped.

The resistance change detected by the temperature detection sensor B5 is converted into a voltage by the resistance 29 and is input to an analog-digital port (hereinafter referred to as A / D port) I3 of the microcomputer 32 to be converted into temperature.

Further, the resistance change detected by the temperature detection sensor A8 is converted into a voltage by the resistance 30, and the A / D of the microcomputer 32 is changed.
Input to port I2 and convert to temperature.

In order to calculate the humidity of the microcomputer 32 by calculation, the temperature is detected by the temperature detection sensor A8 at the start as shown in the flowchart of FIG. Let this value be TA.

Next, the temperature detection sensor B5 detects the temperature. Let this value be TB. Next, the coefficient P is determined by the value of TB.

Next, the temperature difference dt between the temperature detecting sensor A8 and the temperature detecting sensor B5 was obtained, and the calculation formula was set as follows by the difference dt to calculate the humidity.

Dt ≦ 1 (° C.) ... H0 = H0 ′ + K0 × P dt ≦ 2 (° C.) ... H1 = H1 ′ + K1 × P (where H0 ′ is a constant and K0 is a coefficient ) ··· dt> 9 (° C) ··· H10 = H10 ′ + K10 × P Calculated humidity H0, H1 ,. ． When the difference between H9 and H10 and the humidity set by the operating humidity setting means 31 is negative, it is determined that the coil is dry, the signal from the output port O2 of the microcomputer 32 is set to "high", and the coil portion of the relay is connected via the transistor 36. 22b is driven, and relay 23a is turned on.
Then, the heater 7 is operated.

Further, the calculated humidity H0, H1 ,. ． H
If the difference between 9, H10 and the humidity set by the operating humidity setting means 31 is positive, it is judged that the humidity is sufficient, and the microcomputer 32
The signal from the output port O2 of "1" is set to "low", the coil portion 22b of the relay is turned off, the relay 23a is turned off, and the heater 7 is stopped.

[0039]

As described above, according to the present invention, two temperature detecting sensors are used as the humidity detecting means to detect the humidity in the room, and the temperature difference between the room temperature and the two temperature detecting sensors is calculated. Based on the calculation of the humidity of the room by the microcomputer, the material cost of the circuit configuration and the price of the sensor itself are low, so the price is low.

Further, it is possible to provide a steam humidifier control device which is easy to handle, has no sensor variation, does not require selection and adjustment, and improves the efficiency of assembly work.

[Brief description of drawings]

FIG. 1 is a configuration cross-sectional view of a control device for a steam humidifier showing an embodiment of the present invention.

FIG. 2 is a circuit diagram of a control device for a steam humidifier showing an embodiment of the present invention.

FIG. 3 is a timing chart of a control device for a steam humidifier showing an embodiment of the present invention.

[Explanation of symbols]

 1 Body Case 3 Water Receptor 4 Outside Air Suction Port 5 Temperature Detection Sensor B 6 Evaporation Tray 7 Heater 8 Temperature Detection Sensor A 9 Motor Fan 10 Water Absorption Device 11 Water Absorption Tray 21 Commercial Power Supply 22a Photothyristor 23a Relay 26 Constant Voltage Generation Circuit 31 Operating Humidity Setting means 32 Microcomputer

Claims (2)

[Claims] 1. A water receiving tray (3) for storing a fixed amount of water in a main body case (1), an evaporation tray (6) for evaporating water accumulated by heating of a heater (7), and evaporation from the evaporation tray (6). A motor fan (9) that discharges the generated steam, and a temperature detection sensor B (5) arranged at an outside air suction port (4) provided in a part of the main body case (1) as a detection unit that detects atmospheric humidity.
And another temperature detection sensor A (8) in which a water absorbing device (10) for sucking the water in the water absorbing tray (11) is attached to the water absorbing tray (11) which stores a fixed amount of water from the water receiving tray (3) through a different route. A steam-type humidifier control device comprising: 2. A commercial power source (21) is used as a power source, and a series circuit of the motor fan (9) and a photothyristor (22a) for controlling the motor fan (9) is connected in parallel to the commercial power source (21). In addition, a series circuit of the heater (7) and a relay (23a) for controlling the heater (7) is connected in parallel, and a power source of a constant voltage generation circuit (26) connected in parallel to the commercial power source (21). A temperature detection sensor B (5) for detecting the temperature inside the room and a temperature detection sensor A (8) equipped with a water absorbing device (10) are connected to V2, and the power supply V2 of the constant voltage generation circuit (26) is operated. Connect the operating humidity setting means (31) for starting and stopping, and setting the desired humidity,
Further, the heater (7) and the motor fan (9) are operated to operate the temperature detection sensor B (5) and the temperature detection sensor A.
The microcomputer (32) is equipped with a program for calculating the relative humidity from the two temperature changes (8).
2) the temperature detection sensor B (5) and the temperature detection sensor A
The steam humidifier control device according to claim 1, wherein the control device is connected to (8) and an operating humidity setting means (31).