JP3135586U - Terminal block with overheat protection function - Google Patents

Abstract

A terminal block having an overheat protection function that simplifies circuit arrangement by arranging a relay on one side of the terminal block, greatly reduces costs, and improves the convenience of manufacture. .
A terminal block 31 having an overheat protection function has an input end 32 that can be connected to a power source at one end, and an output end 33 that can be connected to electrical equipment (for example, an air conditioner) at the other end. The terminal block 31 includes a temperature sensor 34, a terminal block circuit and a relay 35 therein. The temperature sensor 34 is connected to the circuit of the terminal block 31 by at least an indirect connection method. The relay 35 is connected to the input terminal 32 and the terminal block circuit. And connected to the output terminal 33.
[Selection] Figure 2

Description

  The present invention is a terminal block with overheat protection function, more specifically, by placing a relay and a temperature sensor on the terminal block, the current is over when wiring or mounting is defective, and the temperature sensor when an abnormal rise in temperature occurs It is related with the structure which can prevent starting the relay directly through the sensing signal of this, and interrupting electricity and damaging the electrical equipment connected to a terminal block.

In indoor units of early electrical equipment (such as air conditioners), the terminal block had an overheat protection function, and the internal overheat protection circuit was connected to the relay via a switch. The installation itself was eliminated in the industry, and along with this, such technology was no longer adopted.
FIG. 1A shows a terminal block having an overheat protection function, which was previously adopted by several manufacturers in the Japanese industry. The terminal block 20 and the relay 21 (commercial product) are arranged on the PCB board 22. Although the occupied space is comparatively small, it is an advantage, but the disadvantage is that the PCB needs to be specially manufactured (embedded with a thick copper foil) because of the large current, and therefore the cost is high.

  FIG. 1B shows a terminal block having another overheat protection function. The terminal block 11 has an input end 12 at one end, and the input end 12 has a plurality of connection terminals 121 that can be connected to a power source. The other end of the terminal block 11 has an output terminal 13, and the output terminal 13 has a plurality of connection terminals 131 that can be connected to electrical equipment (for example, an air conditioner). Thereby, the electrical equipment can be electrically connected to the power supply via the terminal block 11, and the power supply can supply power to the electrical equipment. Further, the terminal block 11 has a temperature sensor 14 therein, and the temperature sensor 14 is connected to a circuit of the terminal block 11 and is connected to a relay 15 located on one side of the terminal block 11, and the relay 15 is a circuit of a metal plate. It is electrically connected to the circuit of the terminal block 11 via 151. As a result, when a phenomenon occurs that causes the current to exceed and the temperature to rise abnormally when wiring or mounting is defective, the sensing signal of the temperature sensor 14 directly activates the relay 15 to shut off the power supply. It is possible to prevent an excessive current from flowing into the electrical equipment and damaging the electrical equipment.

  The advantages of the terminal block having the overheat protection function described above are that the occupied space is small, and the wiring between the terminal block and the relay or the PCB board can be omitted. The disadvantage is that, in order to maintain normal operation under a large current (a large ampere), an electrical connection with the circuit of the terminal block 11 is made through a thick metal plate circuit 151 that can withstand the large current. The arrangement is more complicated and the number of metal plate circuits 151 is too high, so that the cost is high, the manufacture is difficult, and a dedicated case is required, so that a commercially available relay cannot be used.

In light of the above-mentioned drawbacks of the prior art, the inventor has pioneered overheat protection as a result of research, experimentation and improvement while developing various solutions based on experience and technology involved in manufacturing terminal blocks. A terminal block with a function was devised. This attempts to improve the disadvantages of the prior art.
The main purpose of the present invention is to provide a terminal with an overheat protection function that simplifies the circuit layout by placing the relay on one side of the terminal block, greatly reduces costs, and improves the convenience of manufacturing. Is to provide a stand.

  In order to achieve the above-mentioned object, the terminal block having an overheat protection function according to the present invention has an input end that can be connected to a power source at one end, and an output end that can be connected to electrical equipment (for example, an air conditioner) at the other end. Have The terminal block has a temperature sensor, a terminal block circuit and a relay inside, and the temperature sensor is connected to the terminal block circuit by at least an indirect connection method, and the relay is connected to the input terminal, the terminal block circuit and the output terminal. . For this reason, if the force of contact with the contact surface between the wire of the wiring and the connection terminal of the terminal block decreases due to poor wiring or mounting, the temperature of the contact surface will rise abnormally, and the temperature will When the limit temperature of the temperature sensor is exceeded, the sensing signal of the temperature sensor can activate the relay via the electrical equipment at the output end and cut off the power supply. As a result, the temperature rises abnormally when wiring or mounting is defective, and a situation in which a fire is generated by an arc or damage to the electrical equipment is prevented. As described above, by arranging the relay on one side of the terminal block, the circuit arrangement can be simplified, the cost can be greatly reduced, and the production convenience can be achieved.

The features, effects of the object, shape and structure of the present invention will be described with reference to the following examples and drawings.
(First embodiment)
2, 3 and 4 show a “terminal block having an overheat protection function” according to the present invention. (In one embodiment of the present invention, the terminal block 31 can be made of a plastic insulating material.) One end of the terminal block 31 has an input end 32 that can be connected to a power source. The end has an output terminal 33, and the output terminal 33 has a plurality of connection ends 331 that can be connected to electrical equipment (for example, an air conditioner). Thereby, the electrical equipment can be electrically connected to the power supply via the terminal block 31, and the power supply can supply electricity to the electrical equipment. The terminal block 31 has a temperature sensor 34 and a relay 35 therein, and the temperature sensor 34 is connected to the circuit of the terminal block 31, the relay 35 is positioned on one side of the terminal block 31, and has an input terminal 32, a terminal It is connected to the circuit of the base 31 and the output end 33.

  As a result, a phenomenon that the temperature of the contact surface rises abnormally occurs when the force of contact with the contact surface between the wire of the wiring and the connection terminal 331 of the terminal block 31 decreases due to poor wiring or mounting, and When the temperature exceeds the limit temperature of the temperature sensor 34, the sensing signal of the temperature sensor 34 activates the relay 35 via the electrical equipment at the output end 33, and cuts off the power supply. For this reason, it is possible to prevent a situation in which the temperature rises abnormally when wiring or mounting is defective and a fire is generated by an arc or the electrical equipment is damaged. As described above, it is possible to simplify the line arrangement by arranging the relay on one side of the terminal block, greatly reduce the cost, improve the convenience in production, and greatly reduce the entire volume. .

  As shown in FIGS. 2, 3 and 4, the input end 32 has a plug 321 which can be inserted into a power supply port. The circuit of the terminal block 31 can be connected to the relay 35 and the connection terminal 331 via the terminal 333 by arranging the terminal 333 at the end of the line, or the circuit of the terminal block 31 directly connects the end of the line to the relay 35. It is possible to connect to the relay 35 and the connection terminal 331 by soldering on the connection end 331. The temperature sensor 34 senses the temperature in the terminal block 31 and, when the temperature exceeds a regulated temperature (for example, 85 ° C.), generates a sensing signal to activate the relay 35 and cut off the power supply. It is.

(Another example)
As shown in FIG. 5, in another embodiment of the present invention, each connection terminal 331 of the output terminal 33 can be a tightenable unit 51 (for example, a screw). As a result, the electrical equipment can be tightened by the tightenable unit 51 and connected to the terminal block 31.
As shown in FIG. 6, in this embodiment, one end of the terminal block 31 has an input end 32 that can be connected to a power source, the other end of the terminal block 31 has an output terminal 33, and the output terminal 33 is an electrical equipment. It has a plurality of connection ends 331 connectable to (for example, an air conditioner). Thereby, the electrical equipment can be electrically connected to the power supply via the terminal block 31, and the power supply can supply electricity to the electrical equipment. The terminal block 31 includes a temperature sensor 34 and a relay 35 therein. The temperature sensor 34 is connected to the relay 35, the relay 35 is positioned on one side of the terminal block 31, and the input terminal 32 and the terminal block 31 are connected to each other. Connected to the circuit.

  As a result, a phenomenon that the temperature of the contact surface rises abnormally occurs when the force of contact with the contact surface between the wire of the wiring and the connection terminal 331 of the terminal block 31 decreases due to poor wiring or mounting, and When the temperature exceeds the limit temperature of the temperature sensor 34, the sensing signal of the temperature sensor 34 directly activates the relay 35 and cuts off the power supply. For this reason, it is possible to prevent a situation in which the temperature rises abnormally when wiring or mounting is defective and a fire is generated by an arc or the electrical equipment is damaged. As described above, it is possible to simplify the line arrangement by arranging the relay on one side of the terminal block, greatly reduce the cost, improve the convenience in production, and greatly reduce the entire volume. .

  The terminal block with overheat protection function according to the present invention clearly has an epoch-making structure, has never been posted in any publication, and there was no arbitrary similar product among commercial products, so no doubt It is considered novel. In addition, the unique features and functions of the present invention are not derived from well-known ones, and are clearly inventive compared with the well-known ones.

  Further, the above is only a preferred example of the present invention, and the structure and features of the present invention cannot be limited. Therefore, any change or modification can be made without departing from the scope of the present invention by those skilled in the art. It should belong to the claimed scope of the present invention.

It is a three-dimensional view of a conventional terminal block. It is an exploded view of the conventional terminal block. 1 is an external view of a terminal block according to an embodiment of the present invention. It is a schematic diagram showing a unit of a part of a terminal block according to an embodiment of the present invention. 1 is a circuit diagram of a terminal block according to an embodiment of the present invention. FIG. 6 is a circuit diagram of a terminal block according to another embodiment of the present invention. FIG. 6 is a circuit diagram of a terminal block according to another embodiment of the present invention.

Explanation of symbols

  31 terminal block, 32 input end, 33 output end, 331 connection terminal, 333 terminal, 34 temperature sensor, 35 relay, 321 plug, 51 Tightening unit

Claims (5)

  One end has an input end that can be connected to a power source, the other end has an output end, and the output end has a plurality of connection terminals that can be connected to the electrical equipment. The power supply can supply electricity to the electrical equipment, the terminal block has a temperature sensor and a relay inside, and the temperature sensor is connected to the terminal block circuit at least by indirect connection method Because the relay is positioned on one side of the terminal block and connected to the input end, the terminal block circuit and the output end, the contact surface between the wiring wires and the terminal block connection When the contact force decreases and the contact surface temperature rises abnormally, and when the temperature exceeds the temperature sensor limit temperature, the temperature sensor detection signal is sent to the relay via the electrical equipment at the output end. To start and shut off the power supply This terminal has an overheat protection function, which can prevent a situation in which the temperature rises abnormally when wiring or mounting is defective, causing a fire due to an arc or damaging electrical equipment. Stand.   The terminal block having an overheat protection function according to claim 1, wherein the terminal block can be made of a plastic insulating material.   The terminal block having an overheat protection function according to claim 1, wherein the input end has a plug connectable to a power source.   The connection terminal of each input end can be a tightenable unit, and the electrical equipment can be tightened by the tightenable unit and can be connected to the terminal block. A terminal block having the overheat protection function described.   The terminal block having an overheat protection function according to claim 1, wherein the temperature sensor is connected to a relay, and the relay is connected to a circuit of an input terminal and a terminal block.

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