Apparatus and method for temperature control using non-magnetic heating wire with independent temperature detection capability

Abstract

The present invention relates to a temperature control device using a non-magnetic heating wire, and more specifically, to a temperature control device and method using a non-magnetic heating wire having an independent temperature detection function that performs precise temperature control through a temperature detection means utilizing an operational amplifier (OPAMP) that includes a parallel bridge circuit to output the temperature detection current to the temperature detection enamel wire and receive the temperature detection current returning from the temperature detection enamel wire, thereby increasing heat generation efficiency and forming a non-magnetic field, and configuring a heating wire through which a heating current flows in one direction to cancel out a magnetic field generated from a heating wire through which a heating current flows, a U-turn enamel wire that causes the heating current to flow in the opposite direction of the one direction, and a temperature detection enamel wire configured in the same layer as the U-turn enamel wire to independently detect the temperature, thereby increasing heat generation efficiency and forming a non-magnetic field, as well as a temperature detection means utilizing an operational amplifier (OPAMP) that includes a parallel bridge circuit to output the temperature detection current to the temperature detection enamel wire and receive the temperature detection current returning from the temperature detection enamel wire.

Description

Technology Field

[0001] The present invention relates to a temperature control device and method using a non-magnetic heating wire, and more specifically, to a temperature control device and method using a non-magnetic heating wire having an independent temperature detection function that performs precise temperature control by utilizing a temperature detection means including an enameled wire dedicated to independent heating wire temperature detection and a parallel bridge circuit driven by direct current, while simultaneously increasing heat generation efficiency and forming a non-magnetic heating wire. Background Technology

[0003] Generally, heating mats such as electric mats and electric blankets include a heating wire that generates heat by receiving an electric current, and a temperature control device that regulates the temperature generated by the heating wire by adjusting the current supplied to the heating wire.

[0004] Typically, heating wires and temperature controllers generate heat by supplying household AC power directly to the wires; therefore, they feature simple and inexpensive circuit structures and are advantageous for high-output operation. Due to these advantages, AC-type heating wires and temperature controllers that heat the wires using AC are widely used.

[0005] However, AC heating wires have a problem in that changes in the magnetic field caused by variable alternating current can induce an electric current in the human body when a person sits or lies on the wire, which can be harmful to the human body. To solve this problem, conventional AC heating wires mainly use two-strand non-magnetic heating wires that cancel out the electric field generated by the alternating current by configuring two heating wires internally and configuring the direction of the alternating current flowing through each heating wire to be opposite.

[0006] Conventional temperature control devices using heating wires measure the temperature generated by the heating wire through an NTC thermistor configured around or inside the heating wire, and control the temperature generated by the heating wire by comparing the measured temperature with a set temperature.

[0007] Conventional temperature control devices have problems such as unstable temperature characteristics and reduced precision when using a standard NTC thermistor as a temperature detection sensor, and unstable temperature characteristics at low temperatures (below 40 degrees) and very high production costs for the heating wire when using an expensive synthetic resin (nylon) NTC thermistor to wrap the upper part of the first heating wire, which is the central heating wire.

[0008] In addition, conventional temperature control devices perform heating operations using high AC power, so there is a problem in that an overvoltage is input to the temperature sensor circuit when supplying heating current due to the heating operation, which can destroy the temperature sensor.

[0009] Accordingly, conventional temperature control devices have a problem in that they can only detect temperature when the heating current is turned off. Prior art literature

[0011] Republic of Korea Registered Patent No. 10-1560123 (Published on Oct. 26, 2015) The problem to be solved

[0012] Accordingly, the objective of the present invention is to provide a temperature control device and method using a non-magnetic field heating wire having an independent temperature detection function, comprising a heating wire through which a heating current flows in one direction to cancel out a magnetic field generated in a heating wire through which a heating current flows, a U-turn enamel wire through which the heating current flows in the opposite direction of the one direction and has a large resistance difference from the heating wire, and a temperature detection enamel wire through which a direct current temperature detection current flows, configured in the same layer as the U-turn enamel wire to independently detect the temperature, thereby increasing the heat generation efficiency due to the differential resistance of the heating wire and the U-turn enamel wire and forming a non-magnetic field, as well as performing precise temperature control through a temperature detection means using an operational amplifier (OPAMP) that receives the temperature detection current, including a parallel bridge circuit driven by direct current. means of solving the problem

[0014] A temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention for achieving the above-mentioned purpose comprises: a core wire constituting a central part; a heating wire wound on the outer surface of the core wire and having a fifth resistance component as a resistance component; an outer sheath covering the upper part of the heating wire; a U-turn enamel wire wound on the outer surface of the outer sheath and having a fourth resistance component as a resistance component that is smaller than the resistance value of the fifth resistance and has a temperature characteristic that changes according to temperature, with one end connected to the other end of the heating wire and the other end connected to the live line of an AC power source; and a temperature detection enamel wire wound on the outer surface of the outer sheath, which is in the same layer as the U-turn enamel wire and having a sixth resistance component as a resistance component; and a switching unit having one end connected to the live line of an AC power source and the other end connected to one end of the heating wire of the non-magnetic heating wire, which turns on or off according to an input gate trigger signal, and supplies the AC power source to the heating wire of the non-magnetic heating wire when turned on. The invention is characterized by comprising: a parallel bridge temperature detection unit that forms a parallel bridge circuit reflecting the sixth resistance of the temperature detection enamel wire connected to one end and the other end of the temperature detection enamel wire, is connected to a DC power source to receive DC, supplies a temperature detection current to the temperature detection enamel wire, and outputs a temperature detection signal corresponding to the input temperature detection current according to the temperature of the non-magnetic heating wire; and a microcomputer that, when the switching unit is turned on, generates a gate trigger signal according to the temperature difference obtained by comparing the set temperature and the temperature corresponding to the temperature detection signal input from the parallel bridge temperature detection unit with the set temperature, and outputs the signal to the switching unit.

[0015] The parallel bridge temperature detection unit comprises: a first resistor, one end of which is connected to the DC power source; a second resistor, one end of which is connected to the DC power source and the other end of which is connected to one end of the temperature detection enameled wire; a third resistor, one end of which is connected to the other end of the first resistor and the other end of which is connected to the other end of the temperature detection enameled wire; and an OPAMP, wherein an inverting terminal (-) is connected to the other end of the second resistor and a non-inverting terminal (+) is connected to the other end of the first resistor and one end of the third resistor, and the sixth resistor, which is a resistance component of the temperature detection enameled wire having the first resistor, the second resistor, the third resistor, and the sixth resistor, forms a parallel bridge circuit to amplify the voltage difference corresponding to the input / output temperature detection current according to the change in the sixth resistor value according to the temperature of the non-magnetic heating wire, and output a temperature detection signal to the microcomputer.

[0016] The parallel bridge temperature detection unit is characterized by further including a negative feedback resistor, one end of which is connected to the inverting terminal and the other end of which is connected to the output terminal of the OPAMP, which determines the amplification rate of the OPAMP when the parallel bridge circuit is in a parallel condition.

[0017] The voltage ratio between the terminals by the above-mentioned fifth resistor and fourth resistor is characterized as being 20:1 or greater.

[0018] The above-described non-magnetic heating wire is characterized by further including a shielding shield that covers the upper portion of the U-turn enameled wire and the temperature detection enameled wire and is connected to ground.

[0019] A temperature control method using a non-magnetic heating wire having an independent temperature detection function according to the present invention for achieving the above-mentioned purpose comprises: a core wire constituting a central part; a heating wire wound on the outer surface of the core wire and having a fifth resistance component as a resistive component; an outer sheath covering the upper part of the heating wire; a U-turn enamel wire wound on the outer surface of the outer sheath and having a sixth resistance component as a resistive component that is smaller than the resistance value of the fifth resistance and has a temperature characteristic that changes according to temperature, with one end connected to the other end of the heating wire and the other end connected to a live line of an AC power source; and a temperature detection enamel wire wound on the outer surface of the outer sheath, which is in the same layer as the U-turn enamel wire and having a sixth resistance component as a resistive component; and a switching unit having one end connected to a live line of an AC power source and the other end connected to one end of the heating wire of the non-magnetic heating wire, which turns on or off according to an input gate trigger signal, and supplies the AC power source to the heating wire of the non-magnetic heating wire when turned on. A temperature control device comprising: a parallel bridge temperature detection unit connected to one end and the other end of the temperature detection enameled wire to form a parallel bridge circuit reflecting the sixth resistance of the temperature detection enameled wire, connected to a DC power source to receive DC, supply a temperature detection current to the temperature detection enameled wire, and output a temperature detection signal corresponding to the received temperature detection current according to the temperature of the non-magnetic heating wire; and a microcomputer, wherein when AC power is supplied, the microcomputer acquires temperature setting information, generates a gate trigger signal according to the acquired temperature setting information and outputs it to a switching unit to supply AC power to the heating wire of the non-magnetic heating wire to generate heat; a heating process in which, when the switching unit is turned on, the microcomputer supplies a temperature detection current to the temperature detection enameled wire of the non-magnetic heating wire through the parallel bridge temperature detection unit, receives a temperature detection signal corresponding to the temperature detection current flowing through the temperature detection enameled wire from the parallel bridge temperature detection unit, and measures the temperature of the non-magnetic heating wire.and is characterized by including a temperature output process in which the microcomputer outputs the temperature through an input / output unit. Effects of the invention

[0021] The present invention has the effect of enabling the formation of a non-magnetic field by configuring the metal materials of the heating wire and the U-turn enamel wire constituting the non-magnetic heating wire differently, thereby including a heating wire with a large resistance value and a U-turn enamel wire with a small resistance value and good temperature characteristics, so that the difference in resistance between the heating wire and the U-turn enamel wire is large, thereby increasing heat generation efficiency, while also configuring the direction of the current flowing through the heating wire and the direction of the current flowing through the U-turn enamel wire to be opposite to each other.

[0022] In addition, the present invention is configured to be arranged alternately with the U-turn enameled wire in the same layer, and by independently configuring the temperature-sensing enameled wire so that a direct current flows to detect the temperature of the heating wire, the temperature is detected by a low direct current voltage regardless of alternating current without affecting the magnetic field, thereby preventing overvoltage from being input to the temperature sensor circuit when measuring the temperature during the supply of heating current, thus preventing short-circuit destruction of the temperature sensor and enabling precise temperature control. Brief explanation of the drawing

[0024] FIG. 1 is a drawing for explaining the structure of a non-magnetic heating wire having an independent temperature detection function according to one embodiment of the present invention. FIG. 2 is a drawing for explaining the structure of a non-magnetic heating wire having an independent temperature detection function according to another embodiment of the present invention. FIG. 3 is a block diagram showing a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention. FIG. 4 is a circuit diagram of a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to one embodiment of the present invention. FIG. 5 is a diagram illustrating a method for forming a non-magnetic field in a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to an embodiment of the present invention. FIG. 6 is a circuit diagram of a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to another embodiment of the present invention. FIG. 7 is a diagram showing an equivalent circuit of a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention. FIG. 8 is a diagram showing a parallel bridge temperature detection unit connected to an enameled wire for temperature detection of a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention. FIG. 9 is a diagram showing the configuration of a parallel bridge temperature detection unit that forms a parallel bridge by representing the temperature detection enameled wire of a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention as a resistor. Specific details for implementing the invention

[0025] The configuration and operation of a non-magnetic heating wire having an independent temperature detection function and a temperature control device using the same according to the present invention will be described below with reference to the attached drawings.

[0026] FIG. 1 is a drawing illustrating the structure of a non-magnetic heating wire having an independent temperature detection function according to one embodiment of the present invention, and FIG. 2 is a drawing illustrating the structure of a non-magnetic heating wire having an independent temperature detection function according to another embodiment of the present invention. The following description refers to FIG. 1 and FIG. 2.

[0027] Reference numeral 10 in the drawing is a differential resistance non-magnetic heating wire that has an independent temperature detection function.

[0028] A non-magnetic heating wire (or referred to as a “differential resistance non-magnetic heating wire”) (10) according to the present invention comprises, in accordance with the first embodiment as shown in FIG. 1, a core wire (or referred to as a “core”, 11) constituting a central part, a heating wire (12) wound on the outer surface of the core wire (11), an outer sheath (13) covering the upper part of the heating wire (12), a U-turn enameled wire (15) wound on the outer surface of the outer sheath (13), a temperature detection enameled wire (14) wound on the same layer as the U-turn enameled wire (15), that is, on the upper part of the outer sheath (13) so as not to overlap with the U-turn enameled wire (15), and a covering (16) covering the upper part of the U-turn enameled wire (15) and the temperature detection enameled wire (14).

[0029] According to the second embodiment, the non-magnetic heating wire (10) according to the present invention may further include a shielding shield (17) that shields the electric field by covering the upper portion of the U-turn enameled wire (15) and the temperature detection enameled wire (14) as shown in FIG. 2.

[0030] When configuring the above-mentioned non-magnetic heating wire (10) in the circuit, one end of the heating wire (12) and one end of the U-turn enamel wire (15) are configured to be physically connected or connected via a switching means so that the direction of the current flowing through the heating wire (12) and the current flowing through the U-turn enamel wire (15) are opposite to each other. Additionally, when configuring the circuit, it is preferable that the shielding shield (17) be grounded.

[0031] The heating wire (12) and U-turn enamel wire (15) of the non-magnetic heating wire (10) of the present invention are made of a first metal and a second metal, respectively, having different resistance values.

[0032] The first metal may be an alloy heating element or other metal conductor, and the second metal is preferably a metal with a high temperature coefficient, such as copper, iron, or nickel.

[0033] The U-turn enamel wire (15) consists of the second metal and an enamel insulating coating that wraps around and insulates the second metal.

[0034] The resistance component of the heating wire (12) is referred to as the fifth resistor, and the resistance component of the U-turn enamel wire (15), i.e., the second metal, is referred to as the fourth resistor. It is preferable that the ratio of the resistance values ​​of the fifth resistor and the fourth resistor (= the ratio of the voltage across the fifth resistor and the fourth resistor) be 20:1 or greater. For example, if the fifth resistor is 200 kΩ, it is preferable that the fourth resistor be 2 kΩ or less.

[0035] The outer covering (13) covering the upper part of the heating wire (12) will be a general covering such as silicone rubber, fluoropolymer, or PVC.

[0036] The above shielding shield (17) may be made of aluminum tape, aluminum foil, carbon-containing carbon synthetic resin, etc.

[0038] FIG. 3 is a block diagram showing a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention; FIG. 4 is a circuit diagram showing a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to one embodiment of the present invention; FIG. 5 is a diagram explaining a method for forming a non-magnetic field in a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to one embodiment of the present invention; FIG. 6 is a circuit diagram showing a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to another embodiment of the present invention; FIG. 7 is an equivalent circuit diagram showing a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention; FIG. 8 is a diagram showing a parallel bridge temperature detection unit connected to a temperature detection enameled wire of a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention; FIG. 9 is a parallel bridge temperature detection unit that forms a parallel bridge by representing the temperature detection enameled wire of a temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention as a resistor. This is a drawing showing the configuration. It will be explained below with reference to FIGS. 3 to 9.

[0039] A temperature control device using a non-magnetic heating wire having an independent temperature detection function includes a non-magnetic heating wire (10) described in FIGS. 1 and 2, an AC power supply (or referred to as an “AC power supply unit”) (20), a DC power supply unit (30), an input / output unit (40), a microcomputer (50), a switching unit (60), and a parallel bridge temperature detection unit (100), and may further include a heating current detection unit (70) according to an embodiment.

[0040] The AC power supply unit (20) includes an active wire (Live, L) and a neutral wire (N) and supplies AC power (voltage, current) through the active wire.

[0041] The DC power supply unit (30) receives AC power from the AC power supply unit (20) and generates a driving voltage, which is a DC voltage required for the device, and provides it to a configuration such as a microcomputer (50) that requires the driving voltage. The driving voltage may be one or more of 12V, 5V, 3.3V, etc. The DC power supply unit (30) may be configured to provide the driving voltage (DC) to the parallel bridge temperature detection unit (100).

[0042] The input / output unit (40) may include an input means including one or more buttons, switches, etc., and a display means for displaying one or more of the operating status of the temperature control device, measured leakage current, heating wire temperature, heating wire average temperature, set temperature, temperature detection error information, etc.

[0043] The switching unit (60) receives AC power from the AC power unit (20) and receives a switching signal, a gate trigger signal (GATE_TRIGGER_out), from the microcomputer (50), and supplies the AC power according to the gate trigger signal to a heating wire (12) that is connected in series with the U-turn enameled wire (15) of the non-magnetic heating wire (10) and has a current direction opposite.

[0044] The heating current detection unit (70) is composed of a resistor, one end of which is connected to the switching unit (60) and the other end of which is grounded, and outputs a heating current monitoring signal to the microcomputer (50) to monitor the heating current supplied to the heating wire (12) of the non-magnetic heating wire (10).

[0045] The parallel bridge temperature detection unit (100) operates by receiving a DC power supply and forms a parallel bridge circuit with the sixth resistor (R6) of the enamel wire (14) for temperature detection of the differential resistance non-magnetic heating wire (10), and outputs a temperature detection signal corresponding to the temperature of the non-magnetic heating wire (10) to the microcomputer (50) according to the change in the sixth resistance value of the sixth resistor (R6) which changes according to the temperature of the differential resistance non-magnetic heating wire (10) by the on / off of the switching unit (60). The DC power supply (120) may be a DC power supply unit (30) or may be configured separately including a battery, etc.

[0047] Referring to FIGS. 4 and 5, the parallel bridge temperature detector (100) includes a first resistor (R1, 101), a second resistor (R2, 102), a third resistor (R3, 103), and an operational amplifier (OPAMP) (104).

[0048] One end of the first resistor (101) and the second resistor (102) is connected to a DC power source (120) to receive DC power.

[0049] The other end of the first resistor (101) is connected to the non-inverting terminal (+) of the OPAMP (104) and one end of the third resistor.

[0050] The other end of the second resistor (102) is connected to one end of the temperature detection enameled wire (14) and the inversion terminal (-) of the OPAMP (104).

[0051] One end of the third resistor (103) is connected to the other end of the first resistor (101) and the non-inverting terminal (+), and the other end is connected to ground and the other end of the temperature detection enameled wire (14).

[0053] The first resistor (101), second resistor (102), third resistor (103), and the sixth resistor, which is the resistance component of the temperature detection enameled wire (14), form a parallel bridge circuit, and the parallel condition is satisfied when R1=R2 and R6=R3.

[0054] The above OPAMP (104) outputs a temperature detection signal to the microcomputer (50) by amplifying the bridge output voltage corresponding to the temperature detection current input from the temperature detection enameled wire (14) in response to the change in resistance of R6 according to the temperature change.

[0055] As shown in FIG. 9, the parallel bridge temperature detector (100) has one end connected to the inverting terminal (-) of the OPAMP (104) and the other end connected to the output terminal (OUT) of the OPAMP (104) and has a negative feedback (NF) resistor (or referred to as “NF feedback resistor”) (R nf It may include )(105) more.

[0056] NF Feedback Resistance (R nf )(105) may be a variable resistor, and when in a parallel condition, the resistance value can be adjusted to control the amplification rate of the OPAMP (104).

[0057] The microcomputer (50) controls the overall operation of the temperature control device using a non-magnetic heating wire having an independent temperature detection function according to the present invention.

[0058] Specifically, the microcomputer (50) receives a temperature control input signal from the input / output unit (40) and a temperature detection signal from the parallel bridge temperature detection unit (100), and supplies a gate trigger signal corresponding to the temperature control input signal, temperature detection signal, etc. to the switching unit (60) to control the amount of heating current supplied to the non-magnetic heating wire (10) and control the temperature of the heat generated in the non-magnetic heating wire (10).

[0059] According to the embodiment, the microcomputer (50) receives a heating current detection signal corresponding to the amount of heating current supplied to the differential resistance non-magnetic heating wire (10) from the heating current detection unit (70) and controls the temperature of the heat generated from the non-magnetic heating wire (10) to be maintained at a set temperature.

[0060] Additionally, according to the embodiment, when a temperature detection signal is input from the parallel bridge temperature detection unit (100), the microcomputer (50) calculates the temperature for the temperature detection signal and outputs the calculated temperature through the input / output unit (40).

[0061] The current supplied to one end of the heating wire (12) of the non-magnetic heating wire (10) or the other end of the U-turn enamel wire (15) through the AC power supply unit (20) flows in one direction along the heating wire (12) by being connected to the other end of the heating wire (12) and one end of the U-turn enamel wire (15) as shown in FIGS. 5 and 6, and then turns around at the U-turn enamel wire (15) and flows in the opposite direction opposite to the one direction to form a non-magnetic field. At this time, the resistance value of the heating wire (12) is high, generating heat at a high temperature, and the resistance value of the U-turn enamel wire (15) is relatively much smaller than the resistance value of the heating wire (12), generating heat at a low temperature, thereby improving thermal efficiency relative to power.

[0062] In FIG. 7, the heating wire (12) of the non-magnetic heating wire (10) and the U-turn enamel wire (15) are connected in series and appear to have current flowing in the same direction, but the heating wire (12) and the U-turn enamel wire (15) are actually bent based on the point of connection, so the current flowing through each flows in opposite directions.

[0063] And as shown in FIG. 7, the temperature detection enameled wire (14) of the non-magnetic heating wire (10) is wound in the same layer as the U-turn enameled wire (15) but configured independently, so as shown in FIG. 8, the temperature detection current corresponding to the temperature (resistance value of R6) of the heat generated by the heating wire (12) and the U-turn enameled wire (15) by a driving power source that is DC and is not affected by the AC power source is output to the parallel bridge temperature detection unit (100), and the parallel bridge temperature detection unit (100) outputs a temperature detection signal corresponding to the temperature detection current to the microcomputer (50).

[0064] Meanwhile, it will be readily understood by those skilled in the art that the present invention is not limited to the typical preferred embodiments described above, but can be implemented with various improvements, modifications, substitutions, or additions within the scope of the essence of the invention. If such implementation through improvements, modifications, substitutions, or additions falls within the scope of the appended claims below, the technical concept thereof should also be considered to belong to the present invention. Explanation of the symbols

[0066] 10: Differential resistance non-magnetic heating wire 11: Core wire 12: Heating wire 13: Sheath (or NTC thermistor) 14: Enameled wire for temperature detection 15: U-turn enameled wire 16: Cover 17: Shield 20: AC power supply 30: DC power supply 40: Input / Output Section 50: Microcomputer 60: Switching unit 70: Heating current detection unit 100: Parallel bridge temperature detector 101: 1st resistor (R1) 102: 2nd resistor (R2) 103: Third resistor (R3) 104: OPAMP

Claims

Claim 1 A non-magnetic heating wire comprising: a core wire constituting a central part; a heating wire wound on the outer surface of the core wire and having a fifth resistance component as a resistance component; an outer sheath covering the upper part of the heating wire; a U-turn enamel wire wound on the outer surface of the outer sheath and having a fourth resistance component as a resistance component that is smaller than the resistance value of the fifth resistance and has a temperature characteristic that changes with temperature, with one end connected to the other end of the heating wire and the other end connected to the live line of an AC power source; and a temperature detection enamel wire wound on the outer surface of the outer sheath, which is in the same layer as the U-turn enamel wire and having a sixth resistance component as a resistance component; a switching unit having one end connected to the live line of an AC power source and the other end connected to one end of the heating wire of the non-magnetic heating wire, which turns on or off according to an input gate trigger signal, and supplies the AC power source to the heating wire of the non-magnetic heating wire when turned on; and a parallel wire connected to one end and the other end of the temperature detection enamel wire reflecting the sixth resistance of the temperature detection enamel wire. A parallel bridge temperature detection unit comprising: a bridge circuit configured and connected to a DC power source to receive DC, supply a temperature detection current to the temperature detection enameled wire, and output a temperature detection signal corresponding to the input temperature detection current according to the temperature of the non-magnetic heating wire; and a microcomputer comprising, when the switching unit is turned on, a gate trigger signal according to the temperature difference obtained by comparing the set temperature and the temperature corresponding to the temperature detection signal input from the parallel bridge temperature detection unit with the set temperature, and outputting the signal to the switching unit, wherein the parallel bridge temperature detection unit comprises: a first resistor having one end connected to the DC power source; a second resistor having one end connected to the DC power source and the other end connected to one end of the temperature detection enameled wire; and a third resistor having one end connected to the other end of the first resistor and the other end connected to the other end of the temperature detection enameled wire.A temperature control device using a non-magnetic heating wire having an independent temperature detection function, characterized by including an OPAMP in which an inverting terminal (-) is connected to the other end of the second resistor and a non-inverting terminal (+) is connected to the other end of the first resistor and one end of the third resistor, wherein the sixth resistor, which is a resistive component of a temperature detection enameled wire having the first, second, and third resistors and the sixth resistor value, forms a parallel bridge circuit and amplifies the voltage difference corresponding to the input / output temperature detection current according to the change in the sixth resistor value according to the temperature of the non-magnetic heating wire, and outputs a temperature detection signal to the microcomputer. Claim 2 delete Claim 3 A temperature control device using a non-magnetic heating wire having an independent temperature detection function, wherein the parallel bridge temperature detection unit further includes a negative feedback resistor, one end of which is connected to the inverting terminal and the other end of which is connected to the output terminal of the OPAMP, and which determines the amplification rate of the OPAMP when the parallel bridge circuit is in a parallel condition. Claim 4 A non-magnetic heating wire comprising: a core wire constituting a central part; a heating wire wound on the outer surface of the core wire and having a fifth resistance component as a resistance component; an outer sheath covering the upper part of the heating wire; a U-turn enamel wire wound on the outer surface of the outer sheath and having a fourth resistance component as a resistance component that is smaller than the resistance value of the fifth resistance and has a temperature characteristic that changes with temperature, with one end connected to the other end of the heating wire and the other end connected to the live line of an AC power source; and a temperature detection enamel wire wound on the outer surface of the outer sheath, which is in the same layer as the U-turn enamel wire and having a sixth resistance component as a resistance component; a switching unit having one end connected to the live line of an AC power source and the other end connected to one end of the heating wire of the non-magnetic heating wire, which turns on or off according to an input gate trigger signal, and supplies the AC power source to the heating wire of the non-magnetic heating wire when turned on; and a parallel wire connected to one end and the other end of the temperature detection enamel wire reflecting the sixth resistance of the temperature detection enamel wire. A temperature control device using a non-magnetic heating wire having an independent temperature detection function, comprising: a parallel bridge temperature detection unit that forms a bridge circuit, is connected to a DC power source to receive DC, supplies a temperature detection current to the temperature detection enameled wire, and outputs a temperature detection signal corresponding to the input temperature detection current according to the temperature of the non-magnetic heating wire; and a microcomputer that, when the switching unit is turned on, generates a gate trigger signal according to the temperature difference obtained by comparing the set temperature and the temperature corresponding to the temperature detection signal input from the parallel bridge temperature detection unit with the set temperature, and outputs the signal to the switching unit, wherein the voltage ratio between the terminals of the fifth resistor and the fourth resistor is 20:1 or greater. Claim 5 A non-magnetic heating wire comprising: a core wire constituting a central part; a heating wire wound on the outer surface of the core wire and having a fifth resistance component as a resistance component; an outer sheath covering the upper part of the heating wire; a U-turn enamel wire wound on the outer surface of the outer sheath and having a fourth resistance component as a resistance component that is smaller than the resistance value of the fifth resistance and has a temperature characteristic that changes with temperature, with one end connected to the other end of the heating wire and the other end connected to the live line of an AC power source; and a temperature detection enamel wire wound on the outer surface of the outer sheath, which is in the same layer as the U-turn enamel wire and having a sixth resistance component as a resistance component; a switching unit having one end connected to the live line of an AC power source and the other end connected to one end of the heating wire of the non-magnetic heating wire, which turns on or off according to an input gate trigger signal, and supplies the AC power source to the heating wire of the non-magnetic heating wire when turned on; and a parallel wire connected to one end and the other end of the temperature detection enamel wire reflecting the sixth resistance of the temperature detection enamel wire. A temperature control device using a non-magnetic heating wire having an independent temperature detection function, comprising: a parallel bridge temperature detection unit that forms a bridge circuit, is connected to a DC power source to receive DC, supplies a temperature detection current to the temperature detection enameled wire, and outputs a temperature detection signal corresponding to the input temperature detection current according to the temperature of the non-magnetic heating wire; and a microcomputer that, when the switching unit is turned on, generates a gate trigger signal according to the temperature difference obtained by comparing the set temperature and the temperature corresponding to the temperature detection signal input from the parallel bridge temperature detection unit with the set temperature, and outputs the signal to the switching unit, wherein the non-magnetic heating wire further includes a shielding shield that covers the upper portion of the U-turn enameled wire and the temperature detection enameled wire and is connected to ground. Claim 6 A non-magnetic heating wire comprising: a core wire constituting a central part; a heating wire wound on the outer surface of the core wire and having a fifth resistance component as a resistive component; an outer sheath covering the upper part of the heating wire; a U-turn enamel wire wound on the outer surface of the outer sheath and having a sixth resistance component as a resistive component that is smaller than the resistance value of the fifth resistance and has a temperature characteristic that changes with temperature, with one end connected to the other end of the heating wire and the other end connected to the live line of an AC power source; and a temperature detection enamel wire wound on the outer surface of the outer sheath, which is in the same layer as the U-turn enamel wire and having a sixth resistance component as a resistive component; and a switching unit having one end connected to the live line of an AC power source and the other end connected to one end of the heating wire of the non-magnetic heating wire, which turns on or off according to an input gate trigger signal, and supplies the AC power source to the heating wire of the non-magnetic heating wire when turned on. A temperature control device comprising: a parallel bridge temperature detection unit connected to one end and the other end of the temperature detection enameled wire to form a parallel bridge circuit reflecting the sixth resistance of the temperature detection enameled wire, connected to a DC power source to receive DC and supply a temperature detection current to the temperature detection enameled wire, and outputting a temperature detection signal corresponding to the temperature detection current received according to the temperature of the non-magnetic heating wire; and a microcomputer, wherein when AC power is supplied, the microcomputer acquires temperature setting information, generates a gate trigger signal according to the acquired temperature setting information and outputs it to a switching unit to supply AC power to the heating wire of the non-magnetic heating wire to generate heat; a heating process in which, when the switching unit is turned on, the microcomputer supplies a temperature detection current to the temperature detection enameled wire of the non-magnetic heating wire through the parallel bridge temperature detection unit, receives a temperature detection signal corresponding to the temperature detection current flowing through the temperature detection enameled wire from the parallel bridge temperature detection unit, and measures the temperature of the non-magnetic heating wire. A temperature control method using a differential resistance non-magnetic heating wire, characterized in that the microcomputer outputs the temperature through an input / output unit.

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