CN216698226U - a temperature protector - Google Patents

Abstract

The utility model discloses a temperature protector, which comprises a casing, a power input port, a power output port and a temperature detector are arranged on the casing, and a power source input port and a power output port are arranged in the casing. A protection circuit module, the temperature detector is electrically connected to the protection circuit module, and when the temperature monitored by the temperature detector reaches a set value, the protection circuit module realizes a power-off operation. The temperature protector of this design can detect the temperature of its surrounding environment at any time when it is energized and used. When it reaches the temperature (or artificially set temperature value) that may cause ignition, induction or natural temperature (or artificially set temperature value), it can directly trip and power off. Or link (drive) the adjacent switch action to improve the fire resistance of the distribution box.

Description

a temperature protector

technical field

The utility model relates to electrical switchgear, in particular to a temperature protector.

Background technique

At present, the common distribution box is composed of multiple miniature circuit breakers, fuses, isolating switches, leakage switches and other components, which are assembled and fixed on a special guide rail, and all the components are closely attached together. This installation method is simple, convenient, intuitive, and saves space, but it is not conducive to the heat dissipation requirements of each component itself. At full load, its technical parameters and even normal use will be affected due to poor heat dissipation. It is said that the more miniature circuit breakers or other electrical components in it (that is, the more circuits), the higher the load rate and the larger the capacity, the higher the ambient temperature in the distribution box and the more dangerous it will be. The higher the probability of fire, the greater the possibility of fire.

The proportion of fire accidents in the distribution box itself is very large in all electrical fires. In a relatively closed and small space, not only various electrical components are densely distributed (such as circuit breakers, fuses, isolation, etc. of various specifications). Switches, leakage protectors, surge protectors and accessories, etc.), and wires of various specifications are sometimes densely packed, and it can often be seen that the entire distribution box is very crowded, almost "airtight", which seriously affects the electrical components. (especially circuit breakers and fuses).

In the long-term use process, due to various reasons (such as vibration, etc.), the terminals of various electrical components are not pressed and compacted, or the wiring is loose, or the contact is poor due to carbonization. The phenomenon of local overheating, temperature rise, etc.; or the phenomenon of "power jump" and "flying fox" caused by insufficient isolation distance and deflection and displacement of wires, etc., may cause fire accidents.

Fire accidents in distribution boxes are very difficult to deal with. Because of their strong professionalism, they are different from other types of fires and cannot be extinguished with water (electric shock accidents may occur or the scope of fire accidents may be expanded, etc.), and ordinary people cannot properly extinguish fires, so The whole society should pay enough attention! In particular, it is necessary to "prevent problems before they occur", completely "kill the accident in the cradle", and never allow the ambient temperature to rise to the extent that it may ignite surrounding materials.

In addition, more and more distribution boxes are now made of various plastic materials, most of which are concealed or covered or blocked by various decorations. Compared with distribution boxes made of metal materials, the heat dissipation conditions are better. worse, and easier to burn. Therefore, it is necessary to improve the fire resistance of the distribution box.

Utility model content

In order to solve the above problems, the utility model provides a temperature protector suitable for a distribution box. When the temperature protector is used with electricity, it can detect the temperature of the environment in the distribution box at any time. When induced or natural temperature (or artificially set temperature value), it can directly trip and power off, or link (drive) the adjacent switch action to improve the fire resistance of the distribution box.

The technical scheme adopted by the present utility model to solve the technical problem is as follows: a temperature protector, comprising a casing, the casing is provided with a power input port, a power output port and a temperature detector, and a connection point is arranged in the casing The protection circuit module of the power input port and the power output port, the temperature detector is electrically controlled and connected to the protection circuit module, and when the temperature monitored by the temperature detector reaches the set value, the protection circuit module is powered off. operate.

Further, the temperature detector adopts a thermistor, and the protection circuit module includes a neutral wire, a live wire, a trip switch, an electromagnet, a one-way thyristor and a power supply chip, and two of the neutral wire and the live wire are used. The ends of the electromagnet are respectively connected to the power input port and the power output port, the trip switch is installed on the neutral wire and the live wire, one end of the electromagnet is connected to the live wire, and the other end is connected to the one-way thyristor The anode of the unidirectional thyristor is connected to the neutral wire, and the power chip is provided with an AC input port, an AC output port, a step-down DC positive output port and a step-down DC negative output port, and the AC input port and the AC output port are respectively connected to the neutral wire and the live wire, the step-down DC positive output port is sequentially connected to the control pole of the thermistor and the one-way thyristor, and the step-down DC negative output port is connected to the The cathode of the unidirectional thyristor; under normal circumstances, the current directly passes through the AC input port and the AC output port of the power chip. The varistor has a current passing through it, which directly triggers the one-way thyristor to conduct. At this time, the working voltage acting on the one-way thyristor is almost the full power supply voltage (220V), that is to say, the voltage on the electromagnet is almost It is also full voltage (220V), which makes the electromagnet work, and the strong electromagnetic force generated thereby pushes the trip switch to open the circuit.

Further, the protection circuit module also includes an adjustable resistor, and the adjustable resistor is connected in series with the thermistor, so that the temperature value that the thermistor needs to detect can be adjusted on-site according to the actual situation, as long as it is properly rotated. Just change the value of the adjustable resistor.

Further, the voltage between the AC input port and the AC output port is 220V, and the voltage between the step-down DC positive output port and the step-down DC negative output port is 3V.

Further, the power input port and the power output port are respectively arranged on the upper and lower ends of the casing, and two wire fastening bolts are also installed on the casing, and the two wire fastening bolts are respectively arranged on the upper and lower ends of the casing. at the power input port and the power output port.

Further, an operation handle is also installed on the casing, and the operation handle is connected to the trip switch to realize manual reset and disconnection of the operation circuit.

Further, the bottom of the housing is provided with mounting feet for rail-type mounting.

Further, the housing is made of polycarbonate (PC for short) or polybutylene terephthalate (PBT for short), which has high electrical insulation strength, flame retardancy, high temperature resistance, low temperature resistance, and is suitable for It has the advantages of large temperature difference area, impact resistance and good oxidation resistance.

The beneficial effect of the utility model is that the designed temperature protector can detect the temperature of its surrounding environment at any time when it is energized and used. , you can directly trip and power off, or link (drive) the adjacent switch action to improve the fire resistance of the distribution box. The structure is simple, the parameters are accurate, the failure rate is low, the cost is economical, the practical value is high, the social benefit is good, the installation is convenient, and the maintenance and repair are also very convenient. After tripping, it can be manually reclosed (the ambient temperature needs to be lowered) to continue working, and it can be used repeatedly without damage due to tripping.

Description of drawings

Fig. 1 is the structural perspective view of the utility model;

FIG. 2 is a circuit schematic diagram of the protection circuit module of the present invention.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings. The specific embodiments are only representative specific embodiments of the present invention, and the specific methods, devices, conditions, materials, etc. exemplified therein are not intended to limit the present invention or the corresponding specific embodiments. This is because each device in the figure is only used to express its relative position and is not drawn according to its actual scale, which will be described together first.

In the description of this specification, references to the terms "preferred", "an embodiment", "another embodiment" or "part of an embodiment" etc. refer to the specific features, structures, A material or feature is included in at least one embodiment of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in one or more embodiments.

Among them, the description of the front, rear, left and right orientations in the text takes FIG. 1 as a reference standard.

As shown in Figure 1, a temperature protector includes a housing, the housing is made of polycarbonate (referred to as PC) or polybutylene terephthalate (referred to as PBT), and has high electrical insulation strength , flame retardant, high temperature resistance, low temperature resistance, suitable for areas with large temperature difference, impact resistance and good oxidation resistance. An operating handle 1 and a temperature detector 2 are installed on the casing. The operating handle 1 is used to realize manual reset and operation circuit disconnection. The upper and lower ends of the casing are respectively provided with the power input port and the power supply. The output port 3, the bottom of the casing is provided with a mounting clip 5 for rail-type installation, and two wire fastening bolts 4 are also installed on the casing, and the two wire fastening bolts 4 are respectively arranged in At the power input port and power output port 3. The casing is provided with a protection circuit module connected to the power input port and the power output port 3, and the temperature detector 2 is electrically connected to the protection circuit module. When the temperature monitored by the temperature detector 2 reaches a set value When the value is set, the protection circuit module realizes a power-off operation.

As shown in Figure 2, the temperature detector adopts thermistor R2, and the protection circuit module includes a neutral wire N, a live wire L, a trip switch K, an adjustable resistor R1, an electromagnet T, and a one-way thyristor SCR and power chip, the operation handle 1 is connected to the trip switch, and the operation handle 1 can realize manual reset and disconnection of the trip switch. The power chip is a power conversion integrated circuit chip with AC output and DC output, which has AC input port, AC output port, step-down DC positive output port and step-down DC negative output port, the AC input port and AC The voltage between the output ports is 220V, and the voltage between the step-down DC positive output port and the step-down DC negative output port is 3V. The two ends of the neutral wire N and the live wire L are respectively connected to the power input port and the power output port 3, the trip switch K is installed on the neutral wire N and the live wire L, and the electromagnet One end of T is connected to the live wire L, the other end is connected to the anode of the unidirectional thyristor SCR, the cathode of the unidirectional thyristor SCR is connected to the neutral wire N, and the AC input port and the AC output port are respectively connected to the The neutral wire N and the live wire L, the step-down DC positive output port is sequentially connected to the adjustable resistor R1, the thermistor R2 and the control pole of the one-way thyristor SCR, the step-down DC negative output port Connect the cathode of the one-way thyristor SCR; under normal circumstances, the current directly passes through the AC input port and the AC output port of the power chip, when the resistance value of the thermistor R2 drops to the set value due to the temperature rise , the thermistor R2 has a current passing through it, which directly triggers the one-way thyristor SCR to turn on. At this time, the working voltage acting on the one-way thyristor SCR is almost the full power supply voltage (220V), that is to say The voltage on the electromagnet T is also almost the full voltage (220V), which makes the electromagnet T work, and the strong electromagnetic force generated thereby pushes the trip switch K to open the circuit. In practical applications, a mechanical linkage device can be set to connect other circuit breakers, and the strong electromagnetic force generated by the electromagnet T can push the mechanical linkage device to make the breaking mechanism of the circuit breaker move, thereby realizing the power-off operation.

The biggest feature of the designed temperature protector is that when it is powered on, it can detect the temperature of its surrounding environment at any time. When it reaches the temperature (or the artificially set temperature value) that may cause ignition, induction or natural temperature (or artificially set temperature value), it can directly trip. Power off, or linkage (drive) adjacent switch action. The temperature protector can also adjust the specific temperature value to be detected on the spot according to the actual situation, as long as it is properly rotated to change the resistance value of the adjustable resistor R1. The temperature protector is easy to install and easy to maintain and repair. After tripping, it can be manually reclosed (the ambient temperature needs to be lowered) to continue working, that is, it can be used repeatedly without damage due to tripping. The temperature protector can be purely electronic, and has simple structure, accurate parameters, low failure rate, economical cost, high practical value and good social benefits. When the temperature protector is tripping, it can automatically transmit the action signal by wire or wireless to realize the centralized management and monitoring function.

According to the principle characteristics of the temperature protector, a series of corresponding products can be derived, such as "main control type", "accessory type", "integrated type", "basic type", "intelligent type" and single-phase single-pole, single-phase Phase bipolar, three-phase three-pole, three-phase four-pole, etc., the specifications can be covered by the full micro-break series, and the standard configuration can be realized.

The above are only preferred embodiments of the present utility model, and should not limit the scope of the present utility model implementation, that is, the simple equivalent changes and Modifications are still within the scope of the utility model patent.

Claims (9)

1. A temperature protector comprising a housing, characterized in that, a power input port, a power output port and a temperature detector are provided on the housing, and a connection between the power input port and the power output is provided in the housing. The protection circuit module of the port, the temperature detector is electrically controlled and connected to the protection circuit module. 2. A temperature protector according to claim 1, wherein the temperature detector adopts a thermistor, and the protection circuit module comprises a neutral wire, a live wire, a trip switch, an electromagnet, a single wire To the thyristor and the power chip, both ends of the neutral wire and the live wire are respectively connected to the power input port and the power output port, the trip switch is installed on the neutral wire and the live wire, and the electromagnet One end is connected to the live wire, the other end is connected to the anode of the one-way thyristor, the cathode of the one-way thyristor is connected to the neutral wire, and the power chip is provided with an AC input port, an AC output port, a step-down DC A positive output port and a step-down DC negative output port, the AC input port and the AC output port are respectively connected to the neutral wire and the live wire, and the step-down DC positive output port is sequentially connected to the thermistor and the single wire. To the control pole of the thyristor, the step-down DC negative output port is connected to the cathode of the unidirectional thyristor; under normal circumstances, the current directly passes through the AC input port and the AC output port of the power chip, when the thermistor When the temperature rises and the resistance value drops to reach the set value, the one-way thyristor is triggered to conduct, so that the electromagnet works, and the magnetic force generated by the electromagnet makes the trip switch disconnect the circuit. 3 . The temperature protector according to claim 2 , wherein the protection circuit module further comprises an adjustable resistor, and the adjustable resistor is connected in series with the thermistor. 4 . 4 . The temperature protector according to claim 2 , wherein the voltage between the AC input port and the AC output port is 220V. 5 . 5 . The temperature protector according to claim 2 , wherein the voltage between the step-down DC positive output port and the step-down DC negative output port is 3V. 6 . 6. A temperature protector according to any one of claims 1-5, wherein the power input port and the power output port are respectively arranged on the upper and lower ends of the casing, and the casing is also Two wire fastening bolts are installed, and the two wire fastening bolts are respectively disposed at the power input port and the power output port. 7 . The temperature protector according to claim 2 , wherein an operating handle is installed on the housing, and the operating handle is connected to the trip switch. 8 . 8 . The temperature protector according to claim 1 or 2 , wherein the bottom of the housing is provided with mounting feet. 9 . 9 . The temperature protector according to claim 1 or 2 , wherein the housing is made of polycarbonate or polybutylene terephthalate. 10 .

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