阅读说明：本技术 带温度监测的电源插头 (Power plug with temperature monitoring function ) 是由 王昌胜 曹俊敏 朱爱珍 陆兆佳 于 2021-01-22 设计创作，主要内容包括：本发明涉及一种带温度监测的电源插头,包括壳体、设置在壳体上的电源端子、设置在壳体内的温度检测组件；温度检测组件包括用于感测电源端子上的温度的温度传感器。具有对插头温度进行监测的功能,克服现有电源插头缺少温度监测的不足,解决由于过热存在的隐患问题,监测的温度信号可以即时通过信号接口及线缆5向外传输温度数字信号,有效地方便了远端对电源插头温度的实时监测,并以温度检测数据为依据,进行电流传输的通断控制。(The invention relates to a power plug with temperature monitoring function, which comprises a shell, a power terminal arranged on the shell and a temperature detection assembly arranged in the shell, wherein the power terminal is connected with the power terminal; the temperature detection assembly includes a temperature sensor for sensing a temperature on the power supply terminal. Have the function of monitoring the plug temperature, overcome the not enough of current power plug lack temperature monitoring, solve because overheated hidden danger problem that exists, the temperature signal of monitoring can be immediately through signal interface and cable 5 outside transmission temperature digital signal, has made things convenient for the real-time supervision of distal end to the power plug temperature effectively to use temperature detection data as the basis, carry out current transmission's on-off control.)

1. The power plug with the temperature monitoring function is characterized by comprising a shell (3), a power terminal (1) arranged on the shell (3), and a temperature detection assembly (2) arranged in the shell (3);

the temperature detection assembly (2) comprises a temperature sensor for sensing the temperature on the power supply terminal (1).

2. The power plug with temperature monitoring of claim 1, wherein the temperature sensor is contact or contactless.

3. The power plug with temperature monitoring of claim 1, wherein the temperature sensor is one of a thermocouple, a resistance temperature detector, an infrared temperature sensor, and a semiconductor temperature sensor.

4. The power plug with temperature monitoring according to claim 1, characterized in that it further comprises a pin connected to the power terminal (1), the pin being one of a blade-shaped pin, a cylindrical pin, a square pin.

5. Power plug with temperature monitoring according to claim 1, characterized in that the rated current of the power terminal (1) is not more than 16A.

6. A power plug with temperature monitoring according to any one of claims 1 to 5, characterised in that the temperature detection assembly (2) further comprises a signal transmission plug terminal (4) in communication connection with the temperature sensor;

the power supply terminal (1) comprises a live wire terminal, a zero line terminal and a grounding terminal.

7. The power plug with temperature monitoring according to claim 6, characterized in that it further comprises a cable (5), said cable (5) comprising live, neutral, earth, signal wires; the power supply terminal (1) is respectively connected with the live wire, the zero line and the ground wire, and the signal transmission plug terminal (4) is connected with the signal wire.

8. Power plug with temperature monitoring according to claim 6, characterized in that the power terminal (1) is connected with the cable (5) by means of soldering or crimping.

9. The power plug with temperature monitoring function according to claim 6, wherein the temperature detection assembly (2) comprises a temperature signal acquisition circuit, an MCU master control circuit, a signal transmission interface circuit and a power supply circuit for supplying power, which are in communication connection;

the temperature signal collected by the temperature sensor is processed by the temperature signal collecting circuit and is transmitted as a digital signal through the signal transmission interface circuit and the cable (5).

10. A power plug with temperature monitoring according to claim 6, characterised in that the housing (3) comprises an upper shell, a lower shell and a sealing ring arranged between the upper and lower shells.

Technical Field

The invention relates to the field of power plugs, in particular to a power plug with a temperature monitoring function.

Background

At present, the use of electric automobile is more and more popularized, and the on-cable alternating current charging box as the charging corollary equipment of electric automobile is also more common.

The charging control box is charged by alternating current on the cable, the charging current is generally below 16A, and the three-hole power plug at the wire inlet end can be used for directly getting electricity from the household three-hole socket. The power plug is a key component for connecting the electrical equipment and the power supply, has wide application, and needs the power plug from the application field of power supply of household appliances to low-power industrial equipment.

The power plug is divided into an injection molding power plug, a conversion power plug and an assembly type power plug according to the head structure process. The power plug that moulds plastics can not the dismouting after the shaping, has safe firm characteristics. 85% of the commercial power plugs are injection molded power plugs.

The conversion plug comprises a plug for converting between different national standards and a plug for converting between different interfaces. The assembled power plug is connected with the cable and the plug in a mode of fixing the locking screw and the like, and has the characteristic of flexible disassembly and assembly.

The mains plug is usually connected to a domestic mains supply, the current flowing through which depends on the power of the consumer. Under the condition that the plug and the socket are not connected well, the high heat is generated at the joint through the large current, the plastic shell of the plug or the socket is burnt due to the high heat accumulation of long-time power supply, the potential safety hazard of human body contact leakage exists, and the risk of fire is also caused.

Disclosure of Invention

The invention aims to provide a power plug with a temperature monitoring function.

The technical scheme adopted by the invention for solving the technical problems is as follows: the power plug with the temperature monitoring function comprises a shell, a power terminal arranged on the shell, and a temperature detection assembly arranged in the shell;

the temperature detection assembly includes a temperature sensor for sensing a temperature on the power supply terminal.

Preferably, the temperature sensor is of the contact or contactless type.

Preferably, the temperature sensor is one of a thermocouple, a resistance temperature detector, an infrared temperature sensor, and a semiconductor temperature sensor.

Preferably, the power plug further comprises a pin connected to the power terminal, and the pin is one of a blade-shaped pin, a cylindrical pin, and a square pin.

Preferably, the rated current of the power supply terminal is not more than 16A.

Preferably, the temperature detection assembly further comprises a signal transmission jack terminal in communication connection with the temperature sensor;

the power supply terminal comprises a live wire terminal, a zero line terminal and a grounding terminal.

Preferably, the power plug further comprises a cable, wherein the cable comprises a live wire, a zero wire, a ground wire and a signal wire; the power supply terminal is respectively connected with the live wire, the zero line and the ground wire, and the signal transmission plug terminal is connected with the signal wire.

Preferably, the power terminal is connected with the cable by welding or crimping.

Preferably, the temperature detection assembly comprises a temperature signal acquisition circuit, an MCU master control circuit, a signal transmission interface circuit and a power supply circuit for supplying power, wherein the temperature signal acquisition circuit, the MCU master control circuit, the signal transmission interface circuit and the power supply circuit are in universal connection;

the temperature signal collected by the temperature sensor is processed by the temperature signal collecting circuit and is transmitted as a digital signal through the signal transmission interface circuit and the cable.

Preferably, the housing includes an upper case, a lower case, and a sealing ring disposed between the upper case and the lower case.

The power plug with the temperature monitoring function has the following beneficial effects: the power plug temperature monitoring device has the function of monitoring the plug temperature, overcomes the defect that the conventional power plug is lack of temperature monitoring, solves the problem of hidden danger caused by overheating, can transmit temperature digital signals outwards through a signal interface and a cable in real time by monitored temperature signals, effectively facilitates the real-time monitoring of the remote end on the power plug temperature, and performs on-off control of current transmission by taking temperature detection data as a basis.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic partial sectional view of a power plug according to an embodiment of the present invention;

FIG. 2 is a schematic top view of the power plug of FIG. 1;

FIG. 3 is a schematic electrical schematic diagram of the power plug of FIG. 1;

FIG. 4 is a schematic circuit diagram of the temperature sensing assembly with a digital IR sensor;

fig. 5 is a schematic circuit diagram illustrating the temperature sensor of the temperature sensing assembly when it is disposed in the lower case of the plug.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, the power plug with temperature monitoring in a preferred embodiment of the present invention includes a housing 3, power terminals 1 provided on the housing 3, a temperature detection assembly 2 provided inside the housing 3, the temperature detection assembly 2 including a temperature sensor for sensing the temperature on the power terminals 1.

Furthermore, the power plug temperature monitoring device has the function of monitoring the plug temperature, overcomes the defect that the conventional power plug is lack of temperature monitoring, solves the problem of hidden danger caused by overheating, can transmit temperature digital signals outwards through the signal interface and the cable 5 in real time, effectively facilitates the real-time monitoring of the remote end on the power plug temperature, and performs on-off control of current transmission by taking temperature detection data as a basis.

The housing 3 includes an upper case, a lower case, and a seal ring disposed between the upper case and the lower case.

The power plug also comprises a pin connected with the power terminal 1, wherein the pin is one of a plug-in pin shape pin, a cylindrical pin and a square pin.

The rated current of the power supply terminal 1 is not more than 16A, the power supply terminal 1 comprises a live wire terminal, a zero line terminal and a grounding terminal, and the temperature detection assembly 2 further comprises a signal transmission plug terminal 4 which is in communication connection with the temperature sensor.

The power plug also comprises a cable 5, wherein the cable 5 comprises a live wire, a zero line, a ground wire and a signal wire; the power supply terminal 1 is respectively connected with a live wire, a zero wire and a ground wire, the signal transmission plug terminal 4 is connected with a signal wire, and preferably, the power supply terminal 1 is connected with a cable 5 in a welding or crimping mode.

The temperature detection assembly 2 comprises a PCB, a temperature signal acquisition circuit arranged on the PCB, an MCU master control circuit, a signal transmission interface circuit and a power supply circuit, wherein a temperature sensor is arranged on the PCB, the temperature sensor, the temperature signal acquisition circuit, the MCU master control circuit and the signal transmission interface circuit are in open connection, and the power supply circuit is used for supplying power.

The power supply circuit is a direct current low voltage conversion circuit and is used for converting the 12V power supply voltage provided by the far end through the signal wire and the signal interface into the voltage suitable for the MCU and other functional chips to work. The temperature signal acquisition circuit converts the signals of the temperature sensor into corresponding voltage signals, and the voltage signals are buffered and then connected to the MCU main control circuit.

The MCU main control circuit adopts an AD conversion mode to perform digital-to-analog conversion on the received temperature voltage analog signals, converts the temperature voltage analog signals into digital signals, and transmits the digital signals to a far end through the signal transmission interface circuit, so that the anti-interference capability of the signals in the transmission process is improved.

In other embodiments, the temperature signal acquisition circuit converts the signal of the temperature sensor into a corresponding voltage signal and then follows the buffer, and then the signal is connected to an input channel of a special AD conversion chip and is converted by the AD chip, and the converted digital signal is read by the MCU main control circuit and is sent to a far end through the signal transmission interface circuit. The scheme is characterized in that the MCU main control circuit and the temperature signal acquisition circuit are in bidirectional digital communication, and a special AD conversion chip is adopted to generally obtain higher conversion precision.

The temperature signal collected by the temperature sensor is processed by the temperature signal collecting circuit, transmitted to a far end as a digital signal through the signal transmission interface circuit and the cable 5, the far end is used for judging the temperature limit value, and the load current is cut off under the over-temperature condition and the over-temperature alarm prompt is carried out.

The temperature sensor is a contact type or a non-contact type, and generally, the temperature sensor is one of a thermocouple, a resistance temperature detector, an infrared temperature sensor and a semiconductor temperature sensor.

Furthermore, the placement position of the contact sensor enables the surface of the device packaging shell to be in insulated heat conduction contact with the L terminal and the N terminal through structural layout, or the contact sensor is placed in the center position between the L terminal and the N terminal and is used for temperature sensing through natural heat transfer.

The non-contact utilizes the temperature variation of infrared induction mode response live wire L terminal and N terminal, makes the response receiving face directly just to the terminal through structural layout, carries out infrared receiving induction.

As shown in fig. 4, in other embodiments, the digital infrared sensor may directly output a digital signal corresponding to a temperature change to the outside by integrating a signal processing circuit inside the digital infrared sensor. The temperature signal is read by the MCU main control circuit and is sent to the far end by the signal transmission interface circuit. The scheme is characterized in that non-contact infrared induction is used for temperature induction, and the MCU main control circuit and the digital infrared induction sensor perform bidirectional digital communication.

As shown in fig. 5, further, in other embodiments, the temperature sensor is separated from other components of the temperature detection assembly 2 in the structural arrangement, the temperature sensor is located in the lower plug shell, and other components of the temperature detection assembly 2 are located in the upper plug shell, and are connected through the signal transmission plug terminals to transmit the temperature sensing signals. The temperature sensor is arranged at the lower plug shell, the surface of the device packaging shell of the temperature sensor can be in insulated heat conduction contact with the L terminal of the live wire and the N terminal of the zero wire through the structural layout, or the temperature sensor is arranged at the central position between the L terminal of the live wire and the N terminal of the zero wire, and the temperature sensing is carried out through natural heat transfer.

It is to be understood that the above-described respective technical features may be used in any combination without limitation.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.