JP2009207958A - Electromagnetic treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic treatment apparatus of a liquid fluid which attempts to improve and optimize the energy efficiency. <P>SOLUTION: The electromagnetic treatment apparatus is characterized by comprising an operation coil installed at the outside of piping constituting the passage of a liquid, an electric source part to supply an electric current to the operation coil, and an electric current control part to make the operation coil generate the beat waveform of higher order harmonics from the operation coil by applying the basic frequency of the electric current to supply the electric source part for the resonance frequency of the operation coil so that the period of the intermittent driving can be adjusted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid-fluid electromagnetic processing apparatus that is improved and optimized in energy efficiency.

2. Description of the Related Art Conventionally, an electromagnetic processing apparatus is known for preventing or removing scale from and on the inner surface of a tubular body constituting a fluid flow path and preventing corrosion of the inner surface of the tubular body.
In the electromagnetic processing device, an operating coil is wound around a pipe serving as a liquid flow path, and a current is supplied to the operating coil from a power supply unit. This current is converted into an electromagnetic field induced current having a specific waveform whose frequency temporally changes in a specific frequency band by the current control unit, and is supplied to the operating coil.
As a result, the coil induces an electromagnetic field to generate a magnetic field and an electric field in the pipe, and gives electrolysis energy to the liquid flowing in the pipe by the magnetic energy of the magnetic field and the electric field using the molecules and ions as a medium. By applying electromagnetic treatment, the surface of deposits such as crystals and rust on the scale and the inner surface of the pipe are strongly negatively charged, repelling them and making the bonds unstable and separating them, and recrystallizing the scales small. While peeling from the inner surface of the pipe, the inner surface of the pipe is reduced to prevent corrosion.
When the operating frequency and the operating coil of this type of electromagnetic processing apparatus are verified, the driving frequency is in the range of DC to 50 KHz, and there are various types of frequency modulation and the basic waveform has a rectangular wave shape.
As an example, the working coil of a water treatment pipe is formed by winding a vinyl wire or the like having a cross section of 2 mm ^{2 around} a pipe having a diameter of about 20 mm 10 to 150 times (practically 10 times). . In order to drive this operating coil, the drive circuit is powered by several to 150 ampere turns.
However, since the inductance of the coil is several tens of μH and the resonance point is 100 KHz or more, conversion to magnetic energy is several tens of minutes of the differential waveform (resonance frequency) excluding the DC component of the rectangular wave. It was about 1 and was very inefficient and most of the power was heat loss. For this reason, there is a problem that the apparatus is inevitably increased in size, the power is wasted and the efficiency is low (see FIGS. 9A to 9D).
JP, 2001-38362, A Refer to Drawing 1-Drawing 2 and Drawing 11.

  The present invention has been made in view of the above circumstances, and its main problem is to focus on the inductance of the working coil, match the drive fundamental frequency to the resonance frequency of the working coil, and perform the intermittent drive to improve efficiency. It is to provide an electromagnetic processing apparatus.

In order to solve the above problem, the invention of claim 1
Actuating coil provided outside the piping constituting the liquid flow path, a power supply unit for supplying current to the working coil, and the fundamental frequency of the current supplied by the power supply unit as the resonance frequency of the working coil, and intermittent driving And a current control unit for generating a beat waveform of harmonics in the operating coil.
In the invention of claim 2,
The resonant circuit formed in the current control unit is a series resonant circuit.
Furthermore, in the invention of claim 3,
The operating coil is formed in a pipe by a winding jig composed of a plurality of divided pieces,
The jig comprises a pair of left and right side plates having an inner circumference slightly larger than the outer circumference of the pipe and a cross member spanned between the side plates to form a winding housing portion having a substantially angled cross section. A wire introduction hole formed on the inner peripheral side of the side member, and a lead-out groove for locking the other end side of the electric wire formed near the outer periphery of the side member and wound around a jig and coming out. And
Assemble the jig by fixing the divided component pieces along the pipe and fitting them together in a substantially donut shape,
By rotating the jig along the pipe, the electric wire is wound in a winding housing portion, and the jig is fixed to the pipe to form an operating coil.

The present invention achieves the efficiency of the electromagnetic processing apparatus by suppressing the DC component (heat loss) as low as possible by performing intermittent driving by matching the drive fundamental frequency of the current supplied by the power supply unit with the resonance frequency of the working coil. be able to.
A harmonic beat waveform is generated in the working coil driven by the high frequency burst waveform of the fundamental frequency consisting of the period of intermittent driving and the resonance frequency of the working coil.
By adjusting the intermittent period and frequency, a power peak can be generated at an optimal period (frequency) for the fluid in the pipe, which is extremely beneficial in improving and optimizing energy efficiency.

  Embodiments of an electromagnetic processing apparatus according to the present invention will be described below with reference to the drawings.

The electromagnetic processing apparatus 1 shown in FIG. 1 allows a liquid to flow using a pipe space in a pipe 2 as a liquid flow path, and an operating coil 3 is provided by winding an electric wire around the pipe 2.
The operating coil 3 is connected to a power supply unit 7 via a current control unit 6. The fundamental frequency of the current supplied by the power supply unit 7 is the resonance frequency of the coil, and a harmonic beat waveform is applied to the operating coil 3. It consists of the structure to generate.
The number of the operating coils 3 wound around the pipe 2 may be one, but in FIG. 1, a plurality of (three in the illustrated example) operating coils are connected in series at a constant interval.

Here, the current control unit 6 has a resonance circuit 10.
The resonance circuit 10 may be a DC resonance circuit or a parallel resonance circuit.
The resonance point of the resonance circuit 10 is maximized in efficiency by matching each constant to the resonance point in the following equation.

例えば、発振回路（ＯＳＣ）：８ＫＨｚの時に、Ｌ：７４μＨ Ｃ：４．５μＦとなる。
図３は共振回路として直列共振回路１０を用いた場合であって、該回路中のＩＣ１（ＬＭ３５８）はＯＰＡＭＰで三角波のランプ波形（図４（ａ）参照）を発生し、ＶＲ２でオフセット電位の調整をする。
また、回路中、ＩＣ２（ＭＣ１４０４６ＢＣ）は、ＶＣＯ高周波発信器であって三角波のランプ波形を変調波として、次段の高周波発生器を断続するためのスイープ波形（図４（ｂ）参照）を発生させる。

For example, when the oscillation circuit (OSC) is 8 KHz, L: 74 μH C: 4.5 μF.
FIG. 3 shows a case where a series resonant circuit 10 is used as a resonant circuit. IC1 (LM358) in the circuit generates a ramp waveform of a triangular wave (see FIG. 4A) by OPAMP, and an offset potential of VR2 Make adjustments.
Further, in the circuit, IC2 (MC14046BC) is a VCO high-frequency oscillator that generates a sweep waveform (see FIG. 4B) for intermittently connecting the next-stage high-frequency generator using a triangular ramp waveform as a modulation wave. Let

In the circuit, Q1 is a power switch, and IC3 (IR2111) is an inverter drive control IC, which generates a carrier wave (20 KHz to 200 KHz) that drives the operating coil (see FIG. 4C).
In this embodiment, the transmission frequency is set to 133 KHz as an example.
CX is a capacitor for series resonance, and constitutes a series resonance circuit with the working coil 3.
Thereby, the fundamental frequency of the current supplied from the power supply unit 7 can be set as the resonance frequency of the coil, and a harmonic beat waveform can be generated in the working coil 3.
In addition, FIG.4 (d) is a working coil superimposed voltage waveform.

Next, in the parallel resonant circuit 10 shown in FIG. 5, IC1 (LM358) in the circuit generates a triangular ramp waveform (see FIG. 4A) with OPAMP, and the offset potential is adjusted with VR2.
In the circuit, IC2 (MC14046BC) is a voltage controlled oscillator (VCO) that generates a sweep waveform for intermittently oscillating the oscillation frequency of the next-stage high-frequency generator using a triangular ramp waveform as a modulation wave. (See FIG. 4B).

Further, in the circuit, IC3 (μPC494C) is a pulse width modulation (PWM) control IC for a switching power supply, and generates a carrier wave (20 Khz to 200 KHz) for driving the operating coil 3.
Also in this embodiment, the transmission frequency was set to 133 KHz.
VR3 adjusts the output power by adjusting the duty ratio of a 133 KHz square wave.

In the circuit, Q2. Q3 and Q4 are Q5 power MOS drive circuits.
Q5 is power SW driven with the power drive waveform shown in FIG. 4C, and R1 is a bleeder resistor for current adjustment.
C1 constitutes a parallel resonance circuit with the working coil 3, and may be arranged in the immediate vicinity of the working coil 3.
In addition, FIG.4 (d) is a working coil superimposed voltage waveform.

In the drawing, the pickup coil 4 is appropriately used when used as a sensor for FFT analysis.
FIG. 6 is a graph showing the FFT analysis, where (a) is a power analysis waveform and (b) is a high-frequency beat waveform, and the effects of the above-described embodiment could be confirmed.

FIG. 2 shows another embodiment in which an operating coil is wound around a pipe.
The number of the operating coils 3 wound around the pipe 2 may be one, but in FIG. 1, a plurality of (three in the illustrated example) operating coils are connected in series at a constant interval.

In FIG. 2, the ferrite core 5 is wound around the working coil 3.
The number of the operating coils 3 wound around the pipe 2 may be one, but in FIG. 1, a plurality of (three in the illustrated example) operating coils are connected in series at a constant interval.
A ferrite core 5 is arranged on each working coil 3 at an angular interval of 120 degrees, fixed to the pipe 2, and then a copper wire of about 0.5 mmφ is wound 11 times.

Next, a space is opened to the width of the ferrite core 5 or more, and the operating coil 3 is formed by winding a copper wire around another ferrite core 5 fixed on the pipe in the same manner.
The actuating coil 3 is arranged from a single row to a plurality of rows depending on conditions and situations.
This is because when the ferrite core 5 is wound into the working coil 3, the magnetic permeability is improved and resonance easily occurs.

Next, the actuation coil 3 shown in FIGS. 7 and 8 is configured to be wound around the pipe 2 using a bobbin-shaped winding jig 20.
In this case, the jig 20 includes a ring split structure 20A, 20B, and a non-conductive material is used.

  In this embodiment, the jig 20 is made of an acrylic resin, and includes a pair of left and right substantially semicircular side plates 22 having an inner circumference 21 having a radius slightly larger than the radius of the outer circumference of the pipe 2, and the pair. The cross member 23 is bridged to the inner periphery 21 side of the side plate 22 and connects the two.

  The side plate 22 has an introduction hole 24 formed near the inner periphery 21 through which the copper wire for forming the working coil 3 is passed, and a copper wire formed near the outer periphery and wound around a jig is pulled out. And a lead-out groove 25 formed in a U-shape.

The two divided jig component pieces 20A and 20B are fitted onto the pipe 2 so as to approach from above and below the pipe 2 and are integrally aligned (see FIGS. 7A and 7B).
Next, a pair of jig constituent pieces 20A and 20B is wound with an adhesive tape 26 to assemble a jig 20 having a winding housing portion 20a having a substantially donut shape with a through-hole formed in the center and an angle-shaped cross section (see FIG. 7 (c)).

A copper wire is drawn obliquely upward through the introduction hole 24 of one side plate 22 of the jig 20 assembled in this manner, and the leading end side of the conducting wire is hooked in the lead-out groove 25 of the other side plate 22.
By rotating the jig 20 along the pipe 2 in the direction a (counterclockwise in the figure) shown in FIG. 8A, the copper wire is easily drawn into the jig 20, and from the introduction hole side to the lead-out groove side. The actuating coil 3 can be formed by winding a conducting wire in the direction b (see FIG. 8B).

In this way, the working coil 3 can be attached to the pipe 2 very easily by bonding or fixing the jig 20 as the working coil 3 by winding the copper wire to the pipe 2 as it is (see FIG. 8B).
Here, the copper wires on the introduction side and the lead-out side extending from the respective jigs 20 are integrated together, the lead-in side is connected to the anode of the current control unit 6, and the lead-out side is connected to the cathode.
The present invention is not limited to the above-described configuration, and it is needless to say that various design changes can be made without changing the gist thereof.

It is a schematic diagram of an electromagnetic processing apparatus. Example 1 It is a schematic diagram of the electromagnetic processing apparatus provided with the ferrite core. (Example 2) It is a circuit diagram of the drive circuit which consists of a series resonance circuit. It is a figure which shows the waveform of a drive circuit, (a) is a ramp waveform, (b) is a VCO output waveform (intermittent signal), (c) is a power drive waveform, (d) is a coil superimposed voltage waveform. It is a circuit diagram of the drive circuit which consists of a parallel resonant circuit. FFT analysis, (a) is a power analysis waveform, and (b) is a high-frequency beat waveform. It is a jig | tool for winding, Comprising: (a) is a side view before an assembly, (b) is the same front view, (c) is a front view of an assembly state. (A) The side view which shows the usage example of the jig for winding, (b) is a front view. (A) is a conventional drive voltage waveform, (b) is a conventional drive current waveform, (c) is a conventional coil superimposed voltage waveform, (d) is a conventional heat loss waveform (simulation), and (e) is the present implementation. It is an example high frequency burst waveform.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic processing apparatus 2 Piping 3 Acting coil 4 Pick-up coil 5 Ferrite core 6 Current control part 7 Power supply part 10 Resonance circuit 20 Jig 20A, 20B Jig component piece 20a Winding accommodating part 21 Inner circumference 22 Side plate 23 Cross member 24 Introduction hole 25 Lead groove 26 Adhesive tape

Claims (3)

  Actuating coil provided outside the piping constituting the liquid flow path, a power supply unit for supplying current to the working coil, and the fundamental frequency of the current supplied by the power supply unit as the resonance frequency of the working coil, and intermittent driving An electromagnetic processing apparatus comprising: a current control unit that makes the operating coil adjustable and generates a harmonic beat waveform.   The electromagnetic processing apparatus according to claim 1, wherein the resonance circuit formed in the current control unit is a series resonance circuit. The working coil is formed in the pipe by a winding jig consisting of a plurality of divided pieces,
The jig comprises a pair of left and right side plates having an inner circumference slightly larger than the outer circumference of the pipe and a cross member spanned between the side plates to form a winding housing portion having a substantially angled cross section. A wire introduction hole formed on the inner peripheral side of the side member, and a lead-out groove for locking the other end side of the electric wire formed near the outer periphery of the side member and wound around a jig and coming out. And
Assemble the jig by fixing the divided component pieces along the pipe and fitting them together in a substantially donut shape,
The electromagnetic processing apparatus according to claim 1, wherein the jig is rotated along a pipe so that the electric wire is wound in a winding housing portion, and the jig is fixed to the pipe to form an operating coil. .

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