A safety protection system for electric floor heating

Abstract

An electric floor heating safety protection system includes a metal detection network, a current limiting circuit, a rectifier circuit, a signal detection control circuit, a protection relay, an alarm, a self-locking circuit and an unlocking reset circuit; the metal detection network is connected in series with the signal detection control circuit through the current limiting circuit and the rectifier circuit in turn, the output end of the signal detection control circuit is respectively connected in parallel with the protection relay and the alarm, and the protection relay is connected in series with the self-locking circuit and the unlocking reset circuit; the metal detection network includes a metal wire or a metal block set in the gap between the floor tiles and the floor, or a metal network or a conductive film under the floor tiles and the floor. Once the present invention detects that any point on the network exceeds the range of the safe voltage, the circuit cuts off the power supply of the electric floor heating and sends out an audible and visual alarm at the same time to achieve the purpose of protecting the safety of electricity use.

Description

Technical Field

[0001] The invention relates to the technical field of electric floor heating, and in particular to an electric floor heating safety protection system. Background Art

[0002] With the increasing pressure of environmental protection and people's pursuit of a better life, electric floor heating has increasingly entered people's lives. However, there are also more and more electrical safety accidents that restrict the development of electric floor heating. People urgently need an efficient and reliable safety protection system to protect their own electrical safety.

[0003] In many years of practical application, it is found that during the use of electric floor heating, electric shock accidents may occur because the urine, soup and other conductive liquids of children and pets flow along the gaps in the floor to the power devices or wires. The traditional leakage protection uses the current difference between the neutral and live wires to determine whether there is leakage, but it cannot protect the human body from electric shock between the neutral and live wires. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art and provide a safe and effective electric floor heating safety protection system.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an electric floor heating safety protection system, including a metal detection network, a current limiting circuit, a rectification circuit, a signal detection control circuit, a protection relay, an alarm, a self-locking circuit and an unlocking reset circuit; the metal detection network is connected in series with the signal detection control circuit through the current limiting circuit and the rectification circuit in sequence, the output end of the signal detection control circuit is respectively connected in parallel with a protection relay and an alarm, the protection relay drive is connected with a normally closed contact, the normally closed contact control is connected with a heating component, and the protection relay is connected in series with a self-locking circuit and an unlocking reset circuit.

[0006] Furthermore, the metal detection net includes metal wires or metal blocks arranged in the gaps between the floor tiles and the floor.

[0007] Furthermore, the metal detection net includes a metal net or a conductive film arranged under the floor tiles and the floor.

[0008] Furthermore, the signal detection control circuit includes a signal amplification circuit.

[0009] Furthermore, the protection relay includes a coil, a normally closed contact and a normally open contact, and the normally closed contact is connected to the power supply terminal of the electric floor heating.

[0010] Furthermore, the alarm is an audible and visual alarm.

[0011] Furthermore, the current limiting circuit includes a current limiting resistor.

[0012] Furthermore, the rectifier circuit includes a bridge rectifier circuit.

[0013] The beneficial effects of the present invention are:

[0014] 1. Metal wires are inserted into the gaps between the floor tiles and the floor of the electric floor heating system. The metal wires form a metal detection network for leakage voltage. The wires are connected to the signal amplification circuit through a current limiting circuit to detect whether the voltage on the metal conductor to the neutral line is within the safe voltage range. Once it is detected that any point on the network exceeds the safe voltage range, the circuit will feed back the signal to the signal amplification circuit of the signal detection control system. The signal amplification circuit immediately starts the protection relay. The normally closed contacts of the electric floor heating power supply terminal are disconnected and self-locked, cutting off the power supply of the electric floor heating system. At the same time, an audible and visual alarm is issued to achieve the purpose of protecting electricity safety.

[0015] 2. The present invention detects leakage between the neutral and live wires to protect against electric shock to the human body, thus filling a gap in the field of circuit protection; the voltage detection network is equivalent to a safety barrier built between people's living environment and the working environment of heating components; while the traditional leakage protection uses the detection of the current difference flowing through the neutral and live wires to determine whether there is leakage, but cannot protect the human body from electric shock between the neutral and live wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a circuit diagram of the present invention.

[0017] In the attached drawings: 11. metal detection net, 12. current limiting circuit, 13. rectification circuit, 21. signal detection control circuit, 22. protection relay, 23. alarm, 31. normally closed contact, 311. heating component, 32. self-locking circuit, 33. unlocking and resetting circuit. DETAILED DESCRIPTION

[0018] The specific implementation mode of the present invention is further described in detail below in conjunction with embodiments:

[0019] like Figure 1As shown, an embodiment of an electric floor heating safety protection system includes a metal detection net 11, a current limiting circuit 12, a rectifier circuit 13, a signal detection control circuit 21, a protection relay 22, an alarm 23, a self-locking circuit 32 and an unlocking reset circuit 33; the metal detection net 11 is connected in series with the signal detection control circuit 21 through the current limiting circuit 12 and the rectifier circuit 13 in sequence, the metal detection net 11 includes a metal wire stuck in the gap between the floor tile and the floor, the current limiting circuit 12 includes a current limiting resistor, and the rectifier circuit 13 includes a bridge rectifier The signal detection control circuit 21 includes a signal amplifying circuit; the output end of the signal detection control circuit 21 is respectively connected in parallel with a protection relay 22 and an alarm 23, the protection relay 22 includes a coil, a normally closed contact and a normally open contact, the normally closed contact is connected to the power supply end of the electric floor heating, and the alarm 23 is an audible and visual alarm; the protection relay 22 is driven and connected with a normally closed contact 31, the normally closed contact 31 is controlled and connected with a heating component 311, and the protection relay 22 is connected in series with a self-locking circuit 32 and an unlocking reset circuit 33.

[0020] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

[0021] The contents not described in detail in the specification belong to the prior art well known to those skilled in the art.

Claims

1. An electric floor heating safety protection system, characterized in that: It includes a metal detection network, a current limiting circuit, a rectifier circuit, a signal detection control circuit, a protection relay, an alarm, a self-locking circuit and an unlocking reset circuit; the metal detection network is connected in series with the signal detection control circuit through the current limiting circuit and the rectifier circuit in sequence, the output end of the signal detection control circuit is respectively connected in parallel with the protection relay and the alarm, the protection relay drive is connected with a normally closed contact, the normally closed contact control is connected with a heating component, the protection relay is connected in series with the self-locking circuit and the unlocking reset circuit, the signal detection control circuit includes a signal amplification circuit, the live wire and the neutral wire are connected to the signal amplifier The protection relay includes a coil, a normally closed contact and a normally open contact. The normally closed contact is connected to the power supply end of the electric floor heating; the metal detection network is connected to the signal amplification circuit by a wire through a current limiting circuit to detect whether the voltage on the metal conductor to the neutral line is within the safe voltage range. Once it is detected that any point on the network exceeds the safe voltage range, the circuit will feed back the signal to the signal amplification circuit of the signal detection control circuit. The signal amplification circuit immediately starts the normally closed contact of the electric floor heating power supply end installed on the protection relay to disconnect and self-lock, cut off the power supply of the electric floor heating, and issue an audible and visual alarm at the same time.

2. The electric floor heating safety protection system according to claim 1, characterized in that: The metal detection net comprises metal wires or metal blocks arranged in the gaps between floor tiles and floors.

3. The electric floor heating safety protection system according to claim 1 is characterized in that: The metal detection net comprises a metal net or a conductive film arranged under the floor tiles and the floor.

4. The electric floor heating safety protection system according to claim 1, characterized in that: The alarm is an audible and visual alarm.

5. The electric floor heating safety protection system according to claim 1, characterized in that: The current limiting circuit includes a current limiting resistor.

6. The electric floor heating safety protection system according to claim 1, characterized in that: The rectifier circuit includes a bridge rectifier circuit.

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