KR102343151B1 - Heating element integrated management system - Google Patents

Abstract

The present invention controls the output of the power supply unit to control the amount of heat generated by each of the heating elements connected to each other (Item 1), and controls the switching unit to prevent inrush current and arcing of the switching unit (Item 2), and controls the switching unit to detect deterioration and/or disconnection of the latch relay (item 3), receive a signal from the current sensor to detect whether each of the heating elements is short-circuited (item 4), and receive a signal from the Detect whether or not each of the heating elements is short-circuited (item 5), receive a signal from the earth leakage arc sensor unit to detect the arc generation of each of the heating elements (item 6), and correspond these six items to each of the heating elements, It includes an integrated management unit that is integratedly displayed on the status display window. The present invention can clearly indicate the management status of the heating elements connected to dozens to hundreds of them through the status display window, so that the manager can easily manage each of the heating elements.

Description

Heating element integrated management system

The present invention relates to a heating element integrated management system.

A heating element is a resistor that converts electrical energy into thermal energy. As a type of heating element, there are a linear heating element using a metal wire and a planar heating element using carbon.

As the types of the planar heating element, there are a film-type planar heating element coated with carbon black on an insulator, and a fiber-type planar heating element in which carbon fibers are randomly scattered between the insulators.

Recently, in order to install a planar heating element on benches in a park to heat a bench, install it on a road to prevent road icing, or install it on an indoor floor or wall to be used for indoor heating, tens to hundreds of planar heating elements are used with each other. They are connected and controlled all at once by the power control device. As an example of such a power control device, there is a multi-channel planar heating element control device that divides and uses the used power of the planar heating element, disclosed in Korean Patent Registration (10-1604381).

On the other hand, even if a part of the planar heating element is damaged or disconnected, it is difficult to find that there is a problem (disconnection, electric leakage, short circuit, etc.) in the planar heating element due to the nature that electricity can be supplied to the remaining part. Moreover, when several tens to hundreds of planar heating elements are connected, it is more difficult to find individual problems of the planar heating elements. This problem cannot be solved at all with the multi-channel planar heating element control device disclosed in Korean Patent Registration (10-1604381).

In addition, with the multi-channel planar heating element control device disclosed in Korean Patent Registration (10-1604381), it is difficult to manage at a glance several tens to hundreds of connected planar heating elements.

Korean Patent Registration (10-1604381)

It is an object of the present invention to provide a heating element integrated management system that can solve the above problems.

A heating element integrated management system for achieving the above object,

power supply;

heating elements respectively connected to the power supply;

+ wires connecting each of the plurality of + poles constituting the power supply and the + poles of each of the heating elements one-to-one;

one -pole constituting the power supply unit and a -wire connecting the -pole of each of the heating elements together;

a switching unit comprising a latch relay and a non-contact relay and installed on each of the + wires;

a current sensor positioned at the rear end of the switching unit and installed on each of the + wires;

a temperature sensor installed for each of the heating elements;

A ring-shaped sensor body positioned at the front end of each of the heating elements and passing through a pair of a + wire connected to the + pole of the heating element and a - wire connected to the - pole of the heating element Earth leakage arc sensor unit; and

Controlling the output of the power supply unit to adjust the amount of heat generated by each of the heating elements connected to each other (Item 1), controlling the switching unit to prevent inrush current and arcing of the switching unit (Item 2), and controlling the switching unit to control the latch Detects deterioration and/or disconnection of the relay (item 3), receives a signal from the current sensor to detect whether each of the heating elements is short-circuited (item 4), receives a signal from the earth leakage arc sensor unit, and receives a signal from each of the heating elements (Item 5), by receiving a signal from the earth leakage arc sensor unit to detect the arc occurrence of each of the heating elements (item 6), check these 6 items for each heating element, and display the It is characterized in that it includes an integrated management unit that is integrally displayed.

The present invention controls the output of the power supply unit to control the amount of heat generated by each of the heating elements connected to each other (Item 1), and controls the switching unit to prevent inrush current and arcing of the switching unit (Item 2), and controls the switching unit to detect deterioration and/or disconnection of the latch relay (item 3), receive a signal from the current sensor to detect whether each of the heating elements is short-circuited (item 4), and receive a signal from the Detect whether or not each of the heating elements is short-circuited (item 5), receive a signal from the earth leakage arc sensor unit to detect the arc generation of each of the heating elements (item 6), and correspond these six items to each of the heating elements, It includes an integrated management unit that is integratedly displayed on the status display window.

Therefore, using the present invention, even when tens to hundreds of heating elements are connected, the heating elements can be controlled in an integrated manner, and problems of individual heating elements can be easily found. For this reason, it is possible to quickly solve the problem at low cost by detecting a problematic heating element at an early stage and replacing or repairing only the heating element.

In addition, the present invention can clearly indicate the management status of the heating elements connected to several tens to hundreds through the status display window, so that the manager can easily manage each of the heating elements.

In addition, according to the present invention, the integrated management unit can remotely manage each of the heating elements through the gateway and the remote terminal, so that the administrator can manage the heating elements anytime, anywhere without going to the site directly.

1 is a view showing an integrated heating element management system according to an embodiment of the present invention.
FIG. 2 is a view for explaining a method of controlling the switching unit shown in FIG. 1 .
FIG. 3 is a view for explaining a method of checking whether a heating element is disconnected with the current sensor shown in FIG. 1 .
FIG. 4 is a view showing the earth leakage arc sensor unit shown in FIG. 1 .
5 is a view for explaining a change in the magnetic field signal received by the magnetic field sensor during a short circuit. - Indicates the change in the magnetic field signal when there is a short circuit in the wire side from the heating element.
6 is a view for explaining a method of adjusting the zero point of the magnetic field sensor.
7 is a view for explaining a change in current flowing through a sensor line when an arc is generated.
8 is a view showing a state in which the integrated management unit checks six management items for each heating element, and is integratedly displayed on the status display window.
9 is a view showing an additional configuration for the integrated management unit to remotely manage each heating element.

Hereinafter, the integrated heating element management system according to an embodiment of the present invention will be described in detail. Reference is basically made to FIG. 1 . The red arrow shown in FIG. 1 indicates the flow of current.

Integrated heating element management system 1 according to an embodiment of the present invention, the power supply unit 10, the heating elements (40a ~ 40n), + wires (2), - wires (3), the switching unit (20a ~ 20n) ), a current sensor 4 , a temperature sensor 5 , an earth leakage arc sensor unit 100 , and an integrated management unit 50 . There are two or more heating elements as 40a 40b ..., and these are indicated by heating elements 40a to 40n.

The power supply unit 10 supplies DC electricity required for heating to each of the heating elements 40a to 40n. The power supply unit 10 may adjust the amount of heat to be the same or different for each of the heating elements 40a to 40n.

Each of the heating elements 40a to 40n is connected to the power supply unit 10 , respectively. Each of the heating elements 40a to 40n is a film-type planar heating element coated with carbon black on an insulator, or a fiber-type planar heating element in which carbon fibers are randomly scattered between insulators. Of course, it may be a linear heating element made of a metal wire.

The + wires 2 connect each of the plurality of + poles constituting the power supply unit 10 and the + poles of each of the heating elements 40a to 40n one-to-one.

-The wire 3 collects and connects one -pole constituting the power supply unit 10 and the -pole of each of the heating elements 40a to 40n.

The switching units 20a to 20n are installed for each of the + wires to allow or prevent current from flowing in the + wires. Each of the switching units 20a to 20n has the same configuration. Accordingly, the first switching unit 20a will be described as an example.

The switching unit 20a includes a latch relay 21a and a non-contact relay 21b. The solid state relay 21b is a MOSFET (metal oxide semiconductor field effect transistor). The non-contact relay 21b blocks the reverse current.

The switching unit 20a connects or disconnects the first heating element 40a and the power supply unit 10 .

As shown in FIG. 2 , the non-contact relay 21b gradually raises the control voltage V to increase the amount of current flowing from the power supply unit 10 to the heating element 40a. When the amount of the current SSR_I reaches the maximum current SSR_Imax, the latch relay 21a is turned on, so that the current also flows through the latch relay 21a. Next, the non-contact relay 21b gradually lowers the control voltage V, so that the current flows only through the latch relay 21a. By changing the current flow path in this way, it is possible to prevent inrush current and arc from occurring when the latch relay 12a is immediately turned on. In addition, when the current continues to flow only through the non-contact relay 21b, it is possible to prevent excessive heat from being generated in the non-contact relay 12b. On the other hand, when the latch relay 21a is deteriorated and/or disconnected, when the latch relay 21a is turned on and a current flows not only to the solid state relay 21b but also to the latch relay 21a, it is normally (standard time) ), more current flows through the non-contact relay 21b. The control system can detect this and diagnose whether the latch relay 21a is deteriorated and/or disconnected.

The current sensor 4 is located at the rear end of the switching units 20a to 20n, and is installed for each of the + wires 2 . The current sensor (4) measures the current flowing through the + wire (2). When a short circuit occurs in the heating elements 40a to 40n, as shown in FIG. 3 , the amount of current flowing to the heating element increases. (I1->I2) Using this principle, it is individually determined whether each of the heating elements 40a to 40n is shorted.

The temperature sensor 5 is installed on each of the heating elements 40a to 40n, and measures the temperature of each of the heating elements 40a to 40n. The power supply unit 10 receives the temperature of the heating elements 40a to 40n from the temperature sensor 5 and adjusts the amount of current sent to the heating elements 40a to 40n, You can adjust the temperature.

The earth leakage arc sensor unit 100 measures an earth leakage and an arc in each of the heating elements 40a to 40n. The earth leakage arc sensor unit 100 is positioned at the front end of each of the heating elements 40a to 40n.

As shown in FIG. 4 , the earth leakage arc sensor unit 100 includes a sensor body 111 , a sensor line 112 , and a magnetic field sensor 210 . The red arrow shown in FIG. 4 indicates the flow of current. The sensor body 111 is made of a ferrite material. The sensor body 111 has a ring shape with a hole in the center. The sensor line 112 is wound around the sensor body 111 . The lower center of the sensor body 111 is cut to form an N pole and an S pole. The magnetic field sensor 210 is located in the middle of the cut out portion. When the magnetic field sensor 210 is located in the center of the cutout, the linearity of the sensor value is improved, and the reliability of the measured value of the magnetic field sensor 210 is increased. A voltage supply line 211 , a ground line 212 , and a signal line 213 are respectively connected to the magnetic field sensor 210 .

As the center of the sensor body 111, a pair of + wires (2) connected to the + pole of the heating element and a - wire (3) connected to the - pole of the heating element pass together as a pair. When there is no leakage current, the current flowing through the + wire (2) entering the heating element and the current flowing through the - wire (3) coming out of the heating element are the same, so the magnetic fields cancel each other out. In this case, the magnetic field signal detected by the magnetic field sensor 210 is zero.

However, if there is a short circuit in the + wire (2) side entering the heating element or in the - wire (3) side coming out of the heating element, the magnetic fields cannot cancel each other out. For example, as shown in Fig. 5(a), when a short circuit occurs in the + wire 2 at time t1, the magnetic field signal Ms changes to a, and as shown in Fig. 5(b), At time t2, if a short circuit occurs in the -wire 3, the magnetic field signal Ms changes to b. In this way, the magnetic field sensor 210 detects a change in the magnetic field, so that it is possible to know whether each of the heating elements 40a to 40n is short-circuited.

Before the magnetic field sensor 210 measures the change in the magnetic field, in order to increase the reliability of the magnetic field signal, the zero point of the magnetic field sensor 210 is adjusted. To this end, as shown in FIG. 6 , by repeatedly flowing + and - current of the same size to the sensor line 112 , the residual magnetic field remaining around the sensor body 111 is removed, and the magnetic field sensor 210 . adjust the zero point of

On the other hand, when an arc is generated in the heating element, as shown in FIG. 7 , current flows instantaneously along the sensor line 112 . With this principle, it can be known whether an arc is generated in each of the heating elements 40a to 40n. In this way, since the sensor line 112 serves to adjust the zero point of the magnetic field and detect the arc generation at the same time, it is possible to know whether the heating element has an electric leakage or an arc with one single earth leakage arc sensor unit 100 .

The integrated management unit 50 controls the output of the power supply unit 10 and controls the switching units 20a to 20n. The integrated management unit 50 receives signals from the current sensor 4 , the earth leakage arc sensor unit 100 , and the temperature sensor 5 . For this reason, the integrated management unit 50 can manage the following six items.

-next-

Item 1. Heating element calorific value control

The integrated management unit 50 may receive a signal from the temperature sensor 5 and control the output of the power supply unit 10 to adjust the amount of heat generated by each of the heating elements 40a to 40n.

Item 2. Switching part inrush current and arc prevention

The integrated management unit 50 controls the operation of the switching units 20a to 20n to prevent inrush current and arc generated when the switch is suddenly turned ON. The principle has been described above.

Item 3. Deterioration and/or disconnection detection of the latch relay constituting the switching unit

The integrated management unit 50 may control the operation of the switching units 20a to 20n to detect deterioration and/or disconnection of the latch relay 21a constituting the switching units 20a to 20n. The principle has been described above.

Item 4. Heating element short circuit detection

The integrated management unit 50 receives a signal from the current sensor 4 and detects whether each of the heating elements 40a to 40n is short-circuited. The principle has been described above.

Item 5. Heating element leakage detection

The integrated management unit 50 receives a signal from the earth leakage arc sensor unit 100, and detects whether or not each of the heating elements 40a to 40n is short-circuited. The principle has been described above.

Item 6. Heating element arc generation detection

The integrated management unit 50 receives a signal from the earth leakage arc sensor unit 100, and detects the arc occurrence of each of the heating elements 40a to 40n. The principle has been described above.

The integrated management unit 50 checks the above six items for each of the heating elements 40a to 40n, and collectively displays them on the status display window 51 . The status display window 51 may be a monitor of a computer installed in the field. The monitor may be a touch screen monitor.

Hereinafter, the integrated management unit 50 checks the above six items for each of the heating elements 40a to 40n and displays it in the status display window 51 as an example when the number of the heating elements 40a to 40n is 6 as an example. listen and explain

As shown in FIG. 8 , six items for the six heating elements 1 to 6 are checked in the status display window 51 and appear at a glance.

indication for item 1

Heating Element 1 and Heating Element 2 are indicated as “High”, which generates high heat (60~80℃), Heating Element 3 and Heating Element 4 are indicated as “Normal”, which emits intermediate heat (40~60℃), and Heating Element 5 and Heating Element 4 6 is indicated as “low”, which produces low heat (20~40℃). When the status display window 51 is a touch screen, by touching the high display of the heating element 1 once, it changes to normal, and when it is touched once more, it changes to low. In this way, the amount of heat generated by the heating element 1 can be adjusted. The other heating elements can also control the amount of heating in the same way. Of course, methods for controlling the amount of heat generated by the heating elements may be varied.

Indications for item 2

If the integrated management unit 50 normally performs the switching unit inrush current and arc prevention, “prevention” is displayed, and when the switching unit cannot perform normally due to an abnormality, “abnormal” is displayed. In this embodiment, the heating element 4 is displayed as "abnormal". In this case, the manager only needs to check item 2 for the switching unit connected to the heating element 4 .

Indications for item 3

If deterioration and/or disconnection of the latch relay constituting the switching unit is not detected, “normal” is displayed, and when detected, “abnormal” is displayed. In this embodiment, the heating element 3 is displayed as “abnormal”. In this case, the manager only needs to check item 3 for the latch relay connected to the heating element 3.

Indications for item 4

If the heating element short circuit is not detected, “normal” is displayed, and if detected, “abnormal” is displayed. In this embodiment, the heating element 6 is displayed as "abnormal". In this case, the manager only needs to check item 4 for the heating element 6.

Indications for item 5

If a heating element leakage is not detected, “normal” is displayed, and if detected, “abnormal” is displayed. In this embodiment, the heating element 2 is displayed as “abnormal”. In this case, the administrator only needs to check item 5 for the heating element 2 .

Indications for item 6

If an arc is not detected in the heating element, “normal” is displayed, and if detected, “abnormal” is displayed. In this embodiment, the heating element 5 is displayed as "abnormal". In this case, the manager only needs to check item 6 for the heating element 5.

Heating element remote management

Meanwhile, the integrated management unit 50 may remotely manage the heating elements 1 to 6, respectively. To this end, as shown in FIG. 9 , the integrated management unit 50 communicates with the heating elements 1 to 6 through the gateway 52 and the remote terminal 53 .

The gateway 52 transmits the signal sent by the integrated management unit 50 to the remote terminal 53 . Conversely, the signal sent by the remote terminal 53 is transmitted to the integrated management unit 50 . The gateway 52 makes it possible to easily add heating elements connected to different communication networks to the integrated management unit 50 .

The remote terminal 53 receives the signal sent from the gateway 52 and sends it to the corresponding heating elements 1 to 6 . The remote terminal 53 is configured with an input channel for signal sensing for signal collection, a button signal output channel, a communication port, and the like.

When the integrated management unit 50 remotely manages each of the heating elements 1 to 6, the status display window 51 of the integrated management unit 50 displays a computer monitor screen installed in the field, as well as a monitor that the administrator can carry. It may be a screen of a tablet PC, a screen of a smartphone, or the like.

In this way, if the integrated management unit 50 can remotely manage each of the heating elements 1 to 6 , the heating elements 1 to 6 can be managed anytime, anywhere, even if the manager does not go directly to the site.

1: Heating element integrated management system
2: +Wire 3: -Wire
4: Current sensor 5: Temperature sensor
20a to 20n: switching unit 40a to 40n: heating elements
50: integrated management unit 51: status display window
52: gateway 53: remote terminal
100: earth leakage arc sensor unit

Claims (5)

power supply; heating elements respectively connected to the power supply; + wires connecting each of the plurality of + poles constituting the power supply and the + poles of each of the heating elements one-to-one; one -pole constituting the power supply unit and a -wire connecting the -pole of each of the heating elements together; a switching unit comprising a latch relay and a non-contact relay and installed on each of the + wires; a current sensor positioned at the rear end of the switching unit and installed on each of the + wires; a temperature sensor installed for each of the heating elements; A ring-shaped sensor body positioned at the front end of each of the heating elements and passing through a pair of a + wire connected to the + pole of the heating element and a - wire connected to the - pole of the heating element Earth leakage arc sensor unit; and controlling the output of the power supply unit to adjust the amount of heat generated by each of the heating elements connected to each other (item 1), controlling the switching unit to prevent inrush current and arcing of the switching unit (item 2), and controlling the switching unit to control the Detects deterioration and/or disconnection of the latch relay (item 3), receives a signal from the current sensor, detects whether each of the heating elements is short-circuited (item 4), receives a signal from the earth leakage arc sensor unit, and receives a signal from the heating elements Detects whether each current is short-circuited (item 5), receives a signal from the earth leakage arc sensor unit, detects arc generation of each of the heating elements (item 6), checks these 6 items for each heating element, and displays a status window In the heating element integrated management system including an integrated management unit that is integrally represented in the
The earth leakage arc sensor unit is composed of the sensor body, a sensor line wound around the sensor body, and a magnetic field sensor located in a lower central cut-out portion of the sensor body,
[Earth leakage detection]
When there is no leakage current, the current flowing in the + wire entering the heating element and the current flowing in the - wire coming out of the heating element are the same, so the magnetic fields cancel each other out,
In the case of a short circuit on the + wire entering the heating element or a short circuit on the - wire exiting the heating element, the magnetic fields do not cancel each other out. and
[Arc detection]
When an arc occurs in the heating element, according to the principle that current flows instantaneously along the sensor line, the current flowing instantaneously in the sensor line detects whether an arc is generated in each of the heating elements,
[Zero Adjustment]
In order to adjust the zero point of the magnetic field sensor, a + current and a - current of the same size are repeatedly flowed to the sensor line to eliminate the residual magnetic field remaining around the sensor body, characterized in that the zero point of the magnetic field sensor is adjusted. heating element integrated management system. delete delete delete According to claim 1,
The integrated management unit communicates with each of the heating elements through a gateway and a remote terminal, and remotely manages each of the heating elements.

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