KR200290027Y1 - Temperature controller of bedding using non-magnetic field heating wire capable of detecting temperature - Google Patents

Abstract

The present invention relates to a temperature controller for bedding using a non-magnetic thermal wire, and provides a non-magnetic thermal wire that can effectively block the generation of electromagnetic waves by a reverse current, while detecting the rated current in a transformer method. The output control for temperature control is to be automatically performed by the zero-zero switching voltage control method by the microcomputer to prevent the occurrence of fire due to overheating when going out for a long time.

The thermostat of bedding using the non-magnetic thermal wire of the present invention, the non-magnetic thermal wire 40; A current detecting transformer 6 installed in a power supply line of the magnetic field-free thermal line to detect a rated alternating current applied to the magnetic field-free thermal line, and a first bridge rectifier 7 for converting the rated alternating current detection signal to direct current. A rated load current signal voltage generation circuit having a first variable resistor (8) and a smoothing capacitor (9) to cut off the power applied to the phase-free magnetic field-sensitive wire by the rated load current signal voltage when the overcurrent is detected; A temperature detector (31) which detects the temperature of the non-magnetic thermal ray and feedback-controls the temperature of the non-magnetic thermal ray; And a power supply unit 11 for applying a use voltage to each circuit.

Description

TEMPERATURE CONTROLLER OF BEDDING USING NON-MAGNETIC FIELD HEATING WIRE CAPABLE OF DETECTING TEMPERATURE}

The present invention relates to a temperature controller for bedding using a non-magnetic thermosensitive wire, and in particular, to detect the rated current in a transformer method, and output control for temperature control is automatically performed by a zero-zero switching voltage control method by a microcomputer. Therefore, the present invention relates to a temperature controller for bedding using a non-magnetic thermal wire that can prevent a fire caused by overheating even when going out for a long time.

When heating beddings warmly by parallel 2-wire heating heaters used in electric beddings, the heating wires of the heaters are short-circuited in the middle so that overcurrent flows, leakage current flows between the heating wires, or voltage fluctuations between the power supply terminals. Fire may occur due to over current caused by over current. In order to prevent the overheating phenomenon, the thermosensitive bimetal contactor is mainly used, but it controls only the partial overheating of the heating wire and does not control the entire heating wire effectively, which increases the risk of fire.

On the other hand, since electric power is applied from the heating wire to the alternating current, alternating agitation electromagnetic waves are generated from the heating wire, and the amount of the AC agitation electromagnetic wave that is not canceled out leaks into the harmful electromagnetic waves, which may adversely affect the human body by the harmful electromagnetic waves. That is, the electromagnetic wave is a phenomenon caused by the wave of energy propagated at a constant speed at one point in the electromagnetic field of the electrical and magnetic properties. These electromagnetic waves are generated from electric devices used in direct contact with the human body, such as electric mats, electric blankets, and electric beds, as well as electric steamers, and when used for a long time, cancer, leukemia, etc. This can be caused.

As described above, in order to prevent the damage caused by electromagnetic waves, a lot of research has been conducted on the conventional bedding bed heating wire, for example, in the Republic of Korea Utility Model No. 108921, although it is not a thermal wire method, wound the temperature sensing resistance wire on the heating wire A three-layer, non-magnetic heating wire with a shield wire is proposed above. In addition, heating wires in which the heating wire and the shield shielding film operate separately, have also been conventionally proposed. In this heating wire, the shielding film attenuates harmful electromagnetic waves generated in the heating wire. In other words, this is not to suppress the generation of electromagnetic waves in advance, but to suppress the generated electromagnetic waves after the fact that the electromagnetic shielding function gradually decreases according to the aging of the shield shielding film. This works greatly.

The present invention has been made in consideration of the above-described problems, and provides a magnetic field-free wire that can effectively block the generation of electromagnetic waves by a reverse current, while detecting a rated current in a transformer manner and controlling output for temperature control. It is automatically operated by the zero-zero switching voltage control method by the microcomputer, and it also detects this when going out for a long time and automatically reduces the heating power to 50% or less of the rating, so that it is possible to prevent fire due to overheating. It is an object of the present invention to provide a temperature controller for bedding using a thermal sensor.

1 is a circuit diagram of the temperature controller of the bedding using the non-magnetic thermal wire according to the present invention.

Figure 2 is a circuit diagram showing another example of the temperature controller of the bedding using the non-magnetic thermal radiation line according to the present invention.

Figure 3 is a circuit diagram showing another example of the temperature controller of the bedding using the non-magnetic thermal radiation line according to the present invention.

Figure 4 is a circuit diagram showing another example of the temperature controller of the bedding using a non-magnetic thermal radiation line according to the present invention.

5 is a graph illustrating a relationship between temperature and current in a thermal line.

<Description of the symbols for the main parts of the drawings>

1: temperature fuse, 6: current detection transformer,

7, 26: bridge rectifier, 11: power supply,

12: microcomputer, 31: temperature detection unit,

33: temperature sensor, 40: non-magnetic thermal wire,

41: first hit, 42: nylon thermistor,

43: second rechargeable, 44: insulation jacket

In order to achieve the above object, the temperature controller of the bedding using the non-magnetic thermal wire according to the present invention, one end is connected to the + power supply side and covered with a nylon thermistor, the first direction and the current direction of the first A magnetic field-free thermal wire having a second lead connected to the other end of the first reel so as to flow in a reverse direction and spirally wound on the outer circumferential surface of the nylon thermistor, the second reel being connected to the power supply side and covered with an insulating sheath; A current detecting transformer in which a primary line is inserted in series to a power supply line of the non-magnetic thermal ray to detect a rated AC current applied to the non-magnetic thermal ray, a first bridge rectifier for converting the rated AC current detection signal into a direct current; A rated load current signal voltage generation circuit having a first variable resistor and a smoothing capacitor, which prevents overheating of the non-magnetic heat sensitive wire by shutting off power applied to the non-magnetic heat sensitive wire by a rated load current signal voltage when an overcurrent is detected; A temperature detector for detecting a temperature of the non-magnetic thermal wire and controlling feedback of the non-magnetic thermal wire; And it is characterized by including a power supply unit for applying the use voltage to each circuit.

According to the present invention, the power applied to the non-magnetic thermal radiation line according to the voltage signal of the signal voltage generation circuit automatically cuts off the power applied to the non-magnetic thermal radiation line by the signal voltage of the rated load current signal voltage generation circuit. A microcomputer for controlling the power to be applied to the magnetic field-free thermal wire during the overcurrent detection; And a temperature fuse to secondarily cut off power applied to the non-magnetic thermal radiation line by short-circuit upon overcurrent detection according to the voltage signal of the signal voltage generation circuit.

In addition, according to the present invention, the temperature detection unit, the current increase due to the decrease in the load resistance value of the nylon thermistor of the non-magnetic thermosensitive wire due to the overheating of the non-magnetic thermosensitive wire or the short circuit of any point, the overvoltage supply of the non-magnetic thermosensitive wire The leakage current component between the overcurrent component or the non-magnetic thermosensitive wire may be electrically connected to the secondary side of the current detection transformer to detect and input the temperature signal voltage as it is induced to the secondary side of the current detection transformer. Alternatively, the temperature detector may be electrically connected to a temperature sensor disposed on the non-magnetic thermal ray to detect the temperature of the non-magnetic thermal wire and input it to the microcomputer.

In addition, according to the present invention, a second bridge rectifier connected to the non-magnetic thermal radiation line may be further included to convert an AC current applied to the non-magnetic thermal radiation line into a direct current, in which case the electromagnetic emission blocking effect is greater. There is this.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms or words used in the present specification and claims are defined in the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her own design. It must be interpreted to mean meanings and concepts.

As shown in Figure 1, the temperature controller of the bedding using the non-magnetic thermal wire according to the present invention, the non-magnetic thermal wire 40; A current detection transformer 6 for detecting a rated alternating current applied to the magnetic field-free thermal ray 40, a first bridge rectifier 7 for converting the rated alternating current detection signal into a direct current, and a first variable resistor 8 And a smoothing capacitor (9), and a rated load for preventing overheating of the non-magnetic thermal wire 40 by cutting off the power applied to the non-magnetic thermal wire 40 by the rated load current signal voltage when detecting an overcurrent. A current signal voltage generating circuit; A temperature detector (31) which detects the temperature of the non-magnetic thermal ray 40 and feedback-controls the temperature of the non-magnetic thermal ray 40; And a power supply unit 11 for applying a voltage to each circuit.

According to the present invention, the magnetic field-sensitive thermal line 40 according to the voltage signal of the signal voltage generation circuit 40 to cut off the power applied to the magnetic field-sensitive thermal line 40 by the signal voltage of the rated load current signal voltage generation circuit A microcomputer 12 that automatically cuts off power to the magnetic field-free thermal wire 40 during overcurrent detection by automatically controlling power applied to the power; And a temperature fuse 1 which secondly cuts off power to the magnetic field-free thermal line 40 by short-circuit upon overcurrent detection according to the voltage signal of the signal voltage generation circuit.

The magnetic field-free thermal wire 40 is connected to the + power supply side and has a first electric charge 41 covered with a nylon thermistor 42, and a current direction and an electric current of the first electric charge 41 flow in opposite directions. And a spiral wound around the outer circumferential surface of the nylon thermistor 42 while being connected to the other end of the first rechargeable 41 to prevent the generation of electromagnetic waves by offsetting each other. It is provided with two hits 43. That is, when the current applied to the non-magnetic thermal wire 40 is applied, since the current direction of the first and second batteries 41 and 43 is opposite to each other, the magnetic field is generated due to the offset caused by the current phase difference. It can reduce, thereby preventing the generation of electromagnetic waves. The nylon thermistor 42 has a characteristic in that the resistance value is suddenly lowered when the magnetic fieldless heater is short-circuited due to overheating or other reasons, as shown in FIG.

On the other hand, according to the present invention, as shown in Figure 2, the second bridge rectifier 26 for converting the AC current applied to the non-magnetic thermal radiation line 40 to a direct current may be further included, in this case, electromagnetic emission The blocking effect has a greater advantage. That is, when rectified by the second bridge rectifier 26 and current is applied to the first and second hitches 41 and 43, the electromagnetic radiation lines 40 are effective. Is connected to the + side of the second bridge rectifier 26, and the second outlet 43 is connected to the − side of the second bridge rectifier 26. Looking at the principle of blocking the electromagnetic wave emission by this structure, when the AC current applied to the non-magnetic thermal radiation line 40 is converted to direct current, electromagnetic stirring does not occur, the energy released into the air is lost and the non-magnetic thermal radiation line 40 Since the current direction of the first electric pole 41 and the second electric pole 43 is also reversed in the inside, the magnetic field does not occur due to the offset caused by the current phase difference.

On the other hand, in the present invention, looking at any intermediate point short-circuit or leakage current detection structure due to overheating of the non-magnetic thermal heater, the power supply for the non-magnetic thermal wire 40 as shown in Figs. A current detecting transformer 6 is installed in the line. When the primary line of the current detecting transformer 6 is inserted in series, an arbitrary point is shorted due to overheating or other reasons of the non-magnetic thermal ray heater. The current increase due to the decrease in the heating wire load resistance value, the current value which increases rapidly due to the decrease in the resistance value of the nylon thermistor 42 of the non-magnetic thermal wire 40, and the overvoltage supply applied to the non-magnetic thermal wire 40 The generated overcurrent and the leakage current between the magnetic field-free wire 40 due to overheating or other reasons are induced in the second lane of the current detecting transformer 6 as it is. The overcurrent signal voltage is converted into direct current by the first bridge rectifier 7 and appears at both ends of the first variable resistor 8. The signal voltage passes through the smoothing capacitor 9 and passes through the rated pressure zener diode 10. It is applied to both ends of the second variable resistor 5.

The signal voltage applied to both ends of the second variable resistor (5) is sent in two branches, one of which is output from the second terminal of the second variable resistor (5) and applied to the microcomputer (12) to reduce the magnetic field. The electric current of the gate signal voltage supply resistor 2 of the power control triac 3 of the heating wire 40 is interrupted to disconnect the power control triac 3 to turn off the power supply to the magnetic field-free thermal wire 40. At the same time, the microcomputer 12 turns on the LED lamp 19 or 21 to indicate that the temperature controller is in operation, and the microcomputer 12 is self-holding (holding) until the power is turned on again. Let's do it.

The other one of the signal voltages applied to both ends of the second variable resistor 5 turns on the triac 3 through the coupling diode 4 so that a current flows in the resistor 2 so that the resistor 2 generates heat. . When the heat generation temperature of the resistor 2 is transferred to the temperature fuse 1 and the temperature fuse 1 is disconnected, the power supply to the magnetic field-free thermal wire 40 is cut off, thereby preventing overheating.

Since the operation response time of the temperature fuse 1 and the self-holding (holding) response time of the microcomputer 12 are faster than the microcomputer 12 by several seconds or more, the temperature fuse 1 is connected to the microcomputer 12 as a second safety device. If abnormality occurs, it operates to cut off the power supply to the non-magnetic thermal wire 100 to prevent overheating secondary.

According to the present invention, the temperature detection unit 31 functions as another safety device for preventing overheating, and the temperature detection unit 31 is caused by the overheating of the magnetic field-free thermal ray 40 or a short circuit at an arbitrary point as described above. Leakage between the current increase due to the decrease in the load resistance value of the nylon thermistor 42 of the non-magnetic thermal wire 40, the overcurrent generated by the overvoltage supply of the non-magnetic thermal wire 40, or the non-magnetic thermal wire 40 It is electrically connected to the secondary side of the current detection transformer 6 as shown in Figs. 1 and 2 so as to detect the temperature signal voltage as the current component is induced on the secondary side of the current detection transformer 6. Alternatively, the temperature detector 31 is electrically connected to the temperature sensor 33 disposed on the non-magnetic thermal wire 40 to detect the temperature of the non-magnetic thermal wire 40, as shown in FIGS. 3 and 4. Can be connected. That is, the temperature signal voltage input from the secondary side of the current detection transformer 6 or the temperature sensor 33 to the temperature detection unit 31 is input to the microcomputer 12 so that the power applied to the magnetic field-free thermal line 40 is reduced. By adjusting by the feedback control, overheating of the magnetic field-free thermal wire 40 is prevented.

The temperature controller of the bedding using the non-magnetic thermosensitive wire according to the present invention is driven by the zero switching voltage control method, more specifically, the microcomputer 12 is a resistor 13 and diodes (14, 15) Input power zero point synchronous signal is input to the microcomputer input port resistor 17 through the coupling diode 16, and the input voltage is adjusted by 1/60 to The voltage is applied to the non-magnetic thermal wire 40 by dividing at 60/60 Hz. That is, when the 60-Hz zero point synchronization signal is input to the microcomputer 12, the microcomputer 12 divides the pulse width adjustment of the 1-second cycle to the power source 1/60 to 60 / 60Hz so that the resistor 22 and the diode 23 are divided. By controlling the turn-on time of the triac 25 through the non-magnetic thermal radiation line 40 is heated. In addition, as can be seen from the temperature and current characteristics of FIG. 5, the rated load current flowing through the non-magnetic thermal wire 40 is rated at 25 ° C and the overheating boundary temperature (the surface of the non-magnetic thermal wire 40 and the upper limit of the superheat temperature). 120 ° C.) increases or decreases the current content of the nylon thermistor 42 and appears on the secondary side of the current detection transformer 6. The increased or decreased current is sent to the temperature detector 31, converted into an automatic temperature control signal by the third variable resistor 32 in proportion to the amplification in the temperature detector 31, and input to the microcomputer 12. The microcomputer 12 feeds back the temperature of the non-magnetic thermal wire 40 by automatic power control of the non-magnetic thermal wire heater with zero switching according to the zero synchronous point.

In the process of heating the electrothermal bedding by the heater using the non-magnetic thermal wire 40 and the heater equipped with a temperature controller, the user set the temperature of the temperature controller to the maximum by mistake due to long-term outing or other reasons for a long time. If left unattended, the power loss is generated as well as the non-magnetic thermal wire 40 is overheated and a fire is generated. In the present invention, the overheating is primarily blocked by a zero switching voltage control method by the microcomputer 12. In addition, since the fire can be prevented by secondary blocking by the temperature fuse 1, there is an advantage that the bedding can be used safely.

The microcomputer 12 counts the time when the triac 25 gate turn-on pulse period is continuously outputted to the maximum, thereby reducing the output pulse width to 1/2 or less and simultaneously displaying one of the LED lamps 19 and 21. It can automatically indicate that it is going out by selecting.

In the drawings, reference numerals 18, 20, and 24 denote resistance, respectively, and 45 denotes a connection point with the first and second rechargeable batteries 41 and 43 to reverse the current direction of the non-magnetic thermal wire 40. Indicates.

As described above, according to the temperature controller of the bedding line using the non-magnetic thermal wire according to the present invention, the structure of the heat-sensitive wire by harmful electromagnetic waves generated by the alternating electromagnetic electromagnetic waves generated in the electrothermal bedding used in direct contact with the human body Because it can be blocked in advance, it is possible to prevent the human body from being exposed to harmful electromagnetic waves.

In addition, the overcurrent that causes overheating is detected at a very short time, and the power supply to the magnetic field-free thermal line 40 is cut off by the zero switch voltage control method by the microcomputer 12, and the temperature fuse (1 Fire prevention effect is great by blocking the secondary by the second), and furthermore, the effect of preventing the occurrence of fire is further improved by allowing the temperature of the non-magnetic thermal wire 40 to be automatically adjusted by the feedback control by the temperature detector 31. Therefore, bedding can be used safely.

Claims (5)

A first thermistor 41 having one end connected to the + power supply side and covered with a nylon thermistor 42, and connected to the other end of the first hither such that a current direction and a current of the first hither flow in a reverse direction. A non-magnetic thermal wire 40 having a second lead 43 which is spirally wound on an outer circumferential surface of the second power supply 43 and connected to a power supply side and covered with an insulating jacket 44; A current detecting transformer 6 in which a primary line is inserted in series to a power supply line of the non-magnetic thermosensitive wire so as to detect a rated alternating current applied to the non-magnetic thermosensitive wire, and a first converting the rated alternating current detection signal into a direct current The bridge rectifier 7, the first variable resistor 8 and the smoothing capacitor 9 are provided, and when the overcurrent is detected, the overheating of the non-magnetic thermal wires is cut off by cutting off the power applied to the phase non-magnetic thermal wires by the rated load current signal voltage. A rated load current signal voltage generation circuit for preventing the load; A temperature detector (31) which detects the temperature of the non-magnetic thermal ray and feedback-controls the temperature of the non-magnetic thermal ray; And, And a power supply unit (11) for applying a voltage to each of the circuits. The method of claim 1, At the time of overcurrent detection by automatically controlling the power applied to the non-magnetic thermal radiation line according to the voltage signal of the signal voltage generation circuit to cut off the power applied to the non-magnetic thermal radiation line by the signal voltage of the rated load current signal voltage generation circuit A microcomputer 12 that primarily blocks power applied to the non-magnetic thermal wire; Using a non-magnetic thermal radiation line, characterized in that it further comprises; a temperature fuse (1) to secondly cut off the power applied to the non-magnetic thermal radiation by short-circuit when the over-current detection according to the voltage signal of the signal voltage generation circuit Bed thermostat. The method of claim 2, The temperature detector 31 is configured to increase the current due to a decrease in the load resistance value of the nylon thermistor 42 of the non-magnetic thermal radiation line due to overheating of the non-magnetic thermal radiation wire 40 or a short circuit at an arbitrary point. The current detecting transformer detects and inputs the temperature signal voltage according to the induced current generated by the overvoltage supply or the leakage current between the non-magnetic thermal radiation wire to the secondary side of the current detecting transformer 6 and inputs it to the microcomputer 12. The temperature controller of the bedding using a non-magnetic thermal wire, characterized in that it is electrically connected to the secondary side. The method of claim 2, The temperature detecting unit 31 is electrically connected to a temperature sensor 33 disposed on the magnetic field-free wire to detect the temperature of the magnetic field-free wire 40 and input it to the microcomputer 12. Temperature controller of bedding using the non-magnetic thermal wire. The method according to any one of claims 1 to 4, The bedding type using the non-magnetic thermal radiation line further comprises a second bridge rectifier 26 connected to the non-magnetic thermal radiation line so as to convert an AC current applied to the non-magnetic thermal radiation line 40 into a direct current. Temperature controller.