JPH04288425A - Control device for ultra humidifier - Google Patents

Abstract

PURPOSE:To make it possible to make a classification in conformity with the detection variability of humidity detectors, assemble substrates to be adjusted and easily correct the production variability of said humidity detectors by combining the connections between two resistors and a proper number of resistors. CONSTITUTION:An oscillation circuit 5 is connected with a third output power source Vout 3 of a voltage generation circuit 4. A humidity detector 6 and a resistor 11 are connected with the output of the oscillation circuit 5 in series. The joint point between the humidity detector 6 and the resistor 11 is connected with an A/D converter input port I1 of a microcomputer 10 by way of an AC-DC conversion circuit 12. Selection means 13 and 14 are installed to correct the production variability of this humidity detector 6. The control of these selection means 13 and 14, and the combination of connections between a resistor 8 and resistors 15 to 17 and the connection between a resistor 9 and resistors 18 and 19 makes it possible to input different voltage to the A/D conversion input ports 13 and 14. It is, therefore, possible to control the production of the humidity detector 6 in conformity with its production variability.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an ultrasonic humidifier that controls the amount of moisture in the air based on humidity.

0002

[Prior Art] A conventional ultrasonic humidifier control device is shown in FIG.
As shown in FIG. 2, a convection fan motor 3 and a voltage generating circuit 4 for supplying output power are connected in parallel to a series circuit of a current fuse 1 and a commercial power source 2. An ultrasonic vibrator 23 and a transistor 22 are connected in parallel with the first output power supply Vout1 of the voltage generating circuit 4 and the earth line GND. A transistor 32 is connected to the second output power supply Vout2 of the voltage generating circuit 4 in series with a resistor 28, and the base end of the transistor 22 is connected to the collector end of the transistor 32 via the resistor 31. In addition to being connected to the output end of the comparator 29, the second output power supply Vout2 of the voltage generating circuit 4 is also connected to a resistor 27, and the opposite side of the resistor 27 is also connected to the output end of the comparator 29.

[0003] Also, the second output power supply Vou of the voltage generation circuit 4
A resistor 25 is connected in series with t2 and the resistor 24, and the connection point thereof is connected to the non-inverting input terminal of the comparator 29, and is also connected to the output terminal of the comparator 29 via the resistor 26.

[0004] Third output power supply Vout of voltage generation circuit 4
3 is connected to an oscillation circuit 5, and a humidity detector 6 and a resistor 11 are connected in series to the output of this oscillation circuit 5.
The junction of the resistor 11 and the resistor 11 is connected to the inverting input terminal of the comparator 29 via the AC-DC conversion circuit 12. The structure of the humidity detection and moisture content control means of this control device was
This is almost the same as No. 26190.

The control device having the above configuration outputs a square wave by inputting the power supply Vout3 outputted from the voltage generation circuit 4 to the oscillation circuit 5. This square wave is applied to the humidity detector 6, and the amount of moisture detected by the humidity detector 6 is converted from a resistance value to a voltage.
The divided voltage value of 1 is converted from an AC voltage and output as a DC voltage. With this output voltage and the voltage determined by resistor 24, resistor 25, and resistor 26, the output of comparator 29 is “H”.
"high" or "Low".

When the output of the comparator 29 is "High",
The transistor 32 is in a closed state, the transistor 22 is in an open state, and the ultrasonic transducer 23 is stopped. Also comparator 29
When the output is “Low”, the transistor 32 is open, the transistor 22 is closed, and the ultrasonic transducer 2
3 works.

[0007]

[Problems to be Solved by the Invention] In the above-mentioned conventional technology,
The characteristics of the elements of the humidity detector 6 vary widely, and it is difficult to make them have the same characteristics during the manufacturing process, so they are always classified into ranks A, B, and C. Since there is a variation of 4 ranks in rank, the resistors 23 and 24 are connected to the non-inverting input terminal of the comparator input terminal in order to perform a constant operation.
, it is necessary to select the resistor 25 according to each rank, and there are problems such as the trouble of arranging parts, mistakes in parts insertion during board production, and a large amount of man-hours for ranking and classifying parts.
This structure has drawbacks such as requiring a resistor 26 to provide hysteresis to prevent chattering when comparing the output voltage of the temperature detector.

[0008]

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and the present invention has been made to solve the above-mentioned problems.
An ultrasonic vibrator is connected to the output power supply of the voltage generation circuit, a microcomputer, a reset circuit that resets this microcomputer, and two resistors are connected to the second output power supply of the voltage generation circuit. An oscillation circuit is connected to the output power supply, a humidity detector and a resistor are connected in series to the output of this oscillation circuit, and the junction point of the humidity detector and the resistor is connected to the A/D conversion input of the microcomputer via an AC-DC conversion circuit. input to the port, and select one of the appropriate number of resistors to connect to each of the two resistors.In order to compensate for manufacturing variations in humidity detectors, data on the variation range is stored in advance in the microcontroller. The voltage is detected at the A/D conversion input port of the microcontroller by a combination of two resistors and an appropriate number of resistors, and the variation in the humidity detector is corrected. A microcomputer is equipped with a program that performs the same control.

[0009]

[Operation] By configuring the present invention as described above, it is possible to assemble a board that ranks and adjusts humidity detectors according to variations in humidity by combining two resistors and an appropriate number of resistors, and oscillates. The square wave output from the circuit is applied to the humidity detector, and the voltage input to the A/D conversion input port of the microcontroller via the AC-DC conversion circuit is used to detect the amount of moisture in the air as the humidity level. In addition to controlling the humidification caused by humidity, it also corrects production variations in humidity detectors, reads which rank the humidity detector falls under according to variations in humidity detectors, and performs the same control even if the rank is different.

0010

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

FIG. 1 is a circuit diagram of a control device for an ultrasonic humidifier, in which a series circuit of a current fuse 1 that disconnects the device in the event of an overcurrent and a commercial power source 2 is connected to a convection fuse that releases atomized water into the air. A fan motor 3 and a voltage generation circuit 4 for power supply configuration are connected in parallel. The convection fan motor 3 is always operated during operation, discharging air inside the appliance and taking in air from outside the appliance.

The voltage generating circuit 4 has a first output power supply Vout1, a second output power supply Vout2, and a third output power supply Vout1, each having a different voltage.
It constitutes the output power supply Vout3. Voltage generation circuit 4
The ultrasonic transducer 23 is connected to the first output power supply Vout1, and the other end of the ultrasonic transducer 23 is connected to the transistor 2.
It is connected to the collector end of 2.

Second output power supply Vout of voltage generation circuit 4
A microcomputer 10 is connected to the microcomputer 2, and a reset circuit 7 serves as a power source for microcomputer operation and resets the microcomputer 10, a series circuit of a resistor 8 and a selection means 13, and a series circuit of a resistor 9 and a selection means 14. Connected. The output of the reset circuit 7 is input to the input port I1 of the microcomputer 10. The junction point between the resistor 8 and the selection means 13 is input to the A/D conversion input port I4 of the microcomputer 10, and the junction point between the resistor 9 and the selection means 14 is inputted to the A/D conversion input port I4 of the microcomputer 10.
It is input to the conversion input port I3. Further, as corresponding to the selection means 13, a resistor 15, a resistor 16, and a resistor 17 are connected to the earth line GND, and as a counterpart to the selection means 14, a resistor 18 and a resistor 19 are connected to the earth line GND.

Third output power supply Vout of voltage generation circuit 4
An oscillation circuit 5 is connected to the terminal 3, and the opposite point of the oscillation circuit 5 is connected to the earth line GND. Furthermore, a humidity detector 6 and a resistor 11 are connected in series to the output of the oscillation circuit 5, and this resistor 1
The opposite point of 1 is connected to the earth line GND. The junction point between the humidity detector 6 and the resistor 11 is connected to the A/D conversion input port I of the microcomputer 10 via an AC-DC conversion circuit 12.
2, and hysteresis is provided inside the microcontroller.

The base end of the transistor 22 is connected to the microcomputer 1.
It is connected to the output port O of 0 through a resistor 21, and is also connected to the earth line GND through a resistor 20.

The operation of one embodiment of the present invention having the above configuration will be explained.

The power supply Vou output from the voltage generation circuit 4
When t3 is input to the oscillation circuit 5, the oscillation circuit 5 outputs a square wave. By applying this square wave to the humidity detector 6, the moisture in the air is converted into a resistance value, which is further converted into voltage.
When inputted to the C conversion circuit 12, a DC voltage is generated, inputted to the A/D conversion input port I2 of the microcomputer 10, and detected as a humidity level.

In addition, measurements are taken in advance to correct production variations in the humidity detector 6, and rankings are manually selected at the time of board assembly, and the selection means 13 and selection means 14
By combining the connection between the resistor 8 and the resistor 15, the resistor 16, or the resistor 17, and the connection between the resistor 9 and the resistor 18 or the resistor 19, the A/D conversion input ports I3 and I4 of the microcomputer 10 are different. voltage is input. By dividing the input voltage levels in advance, as shown in Figure 2,
The variation of the elements of the humidity detector 6 is greatly increased by three of A, B, and C.
The data obtained from each rank is stored in the program memory of microcomputer 10, as shown in Figure 3.
The voltage to be read into the A/D conversion input ports I3 and I4 of microcomputer 10 is determined by the program, and the voltage is read into the output port O of microcontroller 10.
The transistor 22 is driven by a “High” signal output to operate the ultrasonic transducer 23, and the drive of the transistor 22 is stopped by a “Low” signal output from the output port O of the microcomputer 10, and the ultrasonic transducer 23 is operated. to be discontinued.

As described above, the humidity detector 6 is
Since it is possible to read which rank the ultrasonic transducer 23 belongs to according to the variations in the elements of the humidity detector 6 and to make the operating timing of the ultrasonic transducer 23 constant even if the ranks are different, the humidity detector 6 which has a considerably large variation All elements can be used.

[0020]

According to the present invention, two resistors and an oscillation circuit are connected, a humidity detector and a resistor are connected in series to the output of this oscillation circuit, and the junction point of the humidity detector and the resistor is connected to an AC-DC converter.
The input is input to the A/D conversion input port of the microcomputer via a conversion circuit, and one of an appropriate number of resistors is selected and connected to each of the two resistors, thereby eliminating manufacturing variations in humidity detectors. The range data is placed in the memory of the microcomputer in advance, and the voltage is detected at the A/D conversion input port of the microcomputer by connecting two resistors and an appropriate number of resistors. Since the microcontroller is equipped with a program that controls according to variations, even humidity detectors with large production variations can be used without the need for complicated configurations or man-hours such as selecting and assembling different resistances by ranking. This has the effect of making board assembly work, parts arrangement, etc. easy.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a control device for an ultrasonic humidifier according to an embodiment of the present invention.

FIG. 2 is a sequence diagram showing the same operation.

FIG. 3 is a flow chart diagram of the same program.

FIG. 4 is a circuit diagram of a conventional ultrasonic humidifier control device.

[Explanation of symbols]

4 Voltage generation circuit 5 Oscillation circuit 6 Humidity detector 7 Reset circuit 8, 9, 15, 16, 17, 18, 19 Resistor 10
Microcomputer 12 AC-DC conversion circuit 13, 14 Selection means 23 Ultrasonic transducer

Claims (1)

[Claims] 1. Ultrasonic vibration means for connecting a convection fan motor and a voltage generation circuit for supplying power to a commercial power source, and atomizing water to the power generated by the voltage generation circuit;
In a control device for an ultrasonic humidifier that performs humidity control by connecting a control means, a humidity detection means, etc., a voltage generation circuit (4)
The ultrasonic transducer (23) is connected to the first output power supply Vout1 of the voltage generation circuit (4), and the second output power supply Vout1 of the voltage generation circuit (4) is connected to the
A microcomputer (10), a reset circuit (7) that resets the microcomputer (10), a resistor (8), and a resistor (9) are connected in parallel to the voltage generating circuit (4). Connect the oscillation circuit (5) to the output power supply Vout3 of 3,
A humidity detector (6) is connected to the output of the oscillation circuit (5), and the output voltage of the humidity detector (6) is converted to an AC-DC conversion circuit (12).
) to the analog-to-digital conversion (hereinafter referred to as A/D conversion) input port I2 of the microcomputer (10), and the resistor (
8) Resistor (15), Resistor (16), and Resistor (17)
selecting means (13) for selecting and connecting one of the resistors (18) and (19) to the resistor (9); and selecting means (14) for selecting and connecting one of the resistors (18) and (19) to the resistor (9) data on the range of production variations in the humidity detector (6) is placed in advance in the memory of the microcomputer (10), and the resistance (15), resistance (16), resistance (17), resistance ( 18) and resistor (19), and resistor (8) and resistor (9)
), the voltage is detected at the A/D conversion input ports I3 and I4 of the microcontroller (10), and the humidity detector (6
1. A control device for an ultrasonic humidifier, characterized in that a microcomputer (10) is equipped with a program that corrects variations in the temperature and always performs the same control.