WO2015081575A1 - Adjustable multipoint temperature-controlled load thermal protection module - Google Patents

Adjustable multipoint temperature-controlled load thermal protection module Download PDF

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Publication number
WO2015081575A1
WO2015081575A1 PCT/CN2013/088822 CN2013088822W WO2015081575A1 WO 2015081575 A1 WO2015081575 A1 WO 2015081575A1 CN 2013088822 W CN2013088822 W CN 2013088822W WO 2015081575 A1 WO2015081575 A1 WO 2015081575A1
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WO
WIPO (PCT)
Prior art keywords
load
microprocessor
temperature
thermal protection
interface
Prior art date
Application number
PCT/CN2013/088822
Other languages
French (fr)
Chinese (zh)
Inventor
马永红
苏冠贤
卢子忱
刘迎明
Original Assignee
湖南省凯盈科技有限公司
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Application filed by 湖南省凯盈科技有限公司 filed Critical 湖南省凯盈科技有限公司
Priority to PCT/CN2013/088822 priority Critical patent/WO2015081575A1/en
Publication of WO2015081575A1 publication Critical patent/WO2015081575A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/041—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/006—Calibration or setting of parameters

Definitions

  • the invention relates to an over-temperature and over-temperature protection device for an electric heating load, in particular to an adjustable multi-point temperature-controlled load thermal protection module capable of setting temperature and current according to different loads or different temperature protection requirements.
  • a variety of electrical equipment is used in industrial production and people's lives. The performance of electrical equipment is not only reflected in its use function, but more importantly its safety. Since the power load is in the event of a fault, the load may overheat and overheat. When the temperature exceeds the normal value, the load will be short-circuited, burned, etc., which will affect the normal use of the load. For this reason, the general load is equipped with a temperature switch or a thermostat to disconnect the power supply when the load temperature exceeds the set value, and to protect the equipment.
  • existing electronic or electrical equipment can usually only perform temperature measurement and control at a single point, that is, it can only be controlled according to a certain set temperature value, and continuous multi-point adjustment of temperature cannot be performed according to actual needs. Control, resulting in limited application range.
  • the present invention aims to solve the above problems, and provides a temperature and current that can be set according to requirements, can accurately measure the temperature and current of the load, and can control the high power output, and can simultaneously overcharge and over-current the load. Dual protection, and a wide range of adjustable multi-point temperature controlled thermal protection modules.
  • the present invention provides an adjustable multi-point temperature controlled load thermal protection module, the module is provided with a temperature sensor for detecting a load temperature, a current transformer for detecting a load current, and is used for controlling load on and off. Relays, buttons for setting and adjusting temperature and current values, microprocessors for data processing and control, and power interfaces for AC power connections a load interface for electrical load connection, the current transformer is connected to the load interface, and is connected to the microprocessor through a sampling circuit, the relay is connected between the power interface and the load interface, and is connected to the micro processing, The temperature sensor is connected to the microprocessor through a signal input circuit, and the button is connected to the microprocessor, and
  • the load thermal protection module can set and store different operating temperature and current values, so that when the current transformer detects that the load current reaches the set value, or when the temperature sensor detects that the load temperature reaches the set value, the microprocessor The control relay cuts off the load circuit to achieve overcurrent and overtemperature protection of the load.
  • the temperature sensor is a non-contact temperature sensor that is connected to the microprocessor via a signal input circuit.
  • the signal input circuit includes resistors R13, R14, diodes D9, D10, capacitors Cl l, C12.
  • the signal input circuit is connected to the temperature sensor via diodes D9, D10, and resistor R13, and is micro-processed through capacitors Cl l, C12, resistor R14.
  • the connection sends an analog signal of the load temperature measured by the temperature sensor to the microprocessor, which is converted into a digital signal by the microprocessor.
  • the current transformer is a miniature current transformer for measurement, which is connected to the microprocessor through a sampling circuit.
  • the sampling circuit includes resistors R6, R7, R8, R9, diodes D6, D7, capacitors C8, C9.
  • the sampling circuit is connected to the current transformer via R6, R7, R8 and diodes D6, D7, and through capacitors C8, C9, and resistors.
  • the R9 is connected to the microprocessor, and sends a current sampling signal of the current transformer to the load to the microprocessor, and the microprocessor compares and processes the set value, and performs on-off control of the load through the relay.
  • the relays are respectively connected to the live line L of the power interface and the load interface, and are connected to the microprocessor via the diode D1 l, the transistor Q1 and the resistor R15.
  • the fire line L of the power interface is connected with the relay, and the zero line of the power interface is connected with the load interface.
  • the contribution of the invention lies in that the temperature control point of the existing temperature control device is effectively solved, and the applicable range is applicable. Small and other issues.
  • the invention is provided with a temperature sensor and a current transformer, so that the temperature and current of the load can be accurately measured at the same time, and the error of the temperature measurement is at ⁇ 0.5 ° C, and the measured result can be processed by the microprocessor and Control, so that the load can be double protected against over-temperature and over-current.
  • the present invention can set different protection temperature and current values, different temperature and current values can be set for the same load, and different temperature and current values can be set according to the applied load, so the application A wide range. Also, since the present invention controls the on and off of the load through the high power relay, it is possible to control the high power load output.
  • the invention also has the characteristics of modular design, small size and reliable work.
  • Figure 1 is a block diagram showing the overall structure of the present invention.
  • Figure 2 is a circuit schematic of the present invention.
  • the adjustable multi-point temperature controlled thermal protection module of the present invention comprises a temperature sensor 10 , a current transformer 20 , a relay 30 , a button 40 , a microprocessor 50 , a power interface 60 , a load interface 70 , and a sampling circuit 80 . And a signal input circuit 90.
  • the temperature sensor 10 is a non-contact temperature sensor for detecting the temperature of the load.
  • the temperature sensor may be a thermistor or a resistance temperature detector (RTD) or an IC temperature sensor.
  • the temperature sensor is a resistance temperature detector connected to the microprocessor 50 through the signal input circuit 90.
  • the measured load temperature data is sent to the microprocessor 50.
  • the microprocessor 50 (MCU) is a temperature control microprocessor, and has a readable and writable memory storage chip therein, and the rated working temperature and current data of the load can be stored in the memory chip, and the working temperature and current data can pass. Key 40 is written and can be applied according to the applied load Need to be modified.
  • An A/D conversion unit is also provided in the microprocessor 50 for converting an analog signal of temperature data into a digital signal.
  • the signal input circuit 90 includes resistors R13 and R14, diodes D9 and D10, and capacitors Cl1 and C12.
  • the input end of the signal input circuit is connected to the temperature sensor 10 via diodes D9, D10 and R13, and the signal is input.
  • the output of the circuit is connected to the microprocessor 50 via capacitors Cl l, C12 and R14.
  • the temperature sensor 10 detects the temperature of the load in real time, and sends an analog signal of the measured load temperature to the microprocessor 50 through the signal input circuit 90, which is converted into a digital signal by the microprocessor, and
  • the temperature set values stored in the memory storage chip are compared and controlled. If the temperature measured by the temperature sensor 10 reaches the temperature set value, the microprocessor 50 cuts off the load power through the relay 30 to protect the load.
  • the current transformer 20 is a micro current transformer for measurement, which is used for accurately detecting the load current.
  • the current transformer 20 is connected in series to the load interface, and is connected to the microprocessor 50 through the sampling circuit 80, and the load current measured by the load interface is sent to the microprocessor 50 via the sampling circuit 80 for processing.
  • the sampling circuit 80 includes resistors R6, R7, R8, and R9, diodes D6 and D7, and capacitors C8 and C9.
  • the input terminal of the sampling circuit 80 is responsive to current through R6, R7, and R8 and diodes D6 and D7.
  • the device 20 is connected, and the output of the sampling circuit 80 is connected to the microprocessor 50 via capacitors C8, C9 and R9.
  • the sampling circuit 80 obtains the sampling signal of the load current from the current transformer 20, and sends the current sampling signal to the microprocessor 50, which is compared and processed by the microprocessor with the set value, if the current transformer 20 measures When the load current reaches the set value, the microprocessor 50 cuts off the load power through the relay 30 to protect the load.
  • the relay 30 is a load switching device.
  • the relay 30 is a high power relay, which can be used for the connection or disconnection control of a high power load of 40A to 60A.
  • the 4 pin of the relay 30 is connected to the live line L of the power interface 60
  • the 3 pin of the relay 30 is connected to the load interface 70
  • the load interface is also connected in series with the neutral line N of the power interface 60.
  • the 1st and 2nd pins of the relay 30 are connected to the microprocessor 50 via the diode D1 l, the transistor Q1 and the resistor R15.
  • the processor 50 controls its contacts to close or open.
  • the button 40 can be a universal button that is connected to the microprocessor 50 through resistors R18 and R19. This button allows you to enter the set load rated operating temperature and current data and can be modified as needed.
  • the power interface 60 and the load interface 70 are universal plug-in interfaces.
  • the present invention sets and stores different operating temperature and current values of the load such that when the current transformer 20 detects that the load current reaches the set value, or when the temperature sensor 10 detects that the load temperature reaches the set value,
  • the relay 30 is controlled by the microprocessor 50 to cut off the load circuit to achieve overcurrent and overtemperature protection of the load.

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

An adjustable multipoint temperature-controlled load thermal protection module, provided with a temperature sensor (10), a current transformer (20), a relay (30), a button (40), a microprocessor (50), and a power supply interface (60) and load interface (70); said current transformer (20) being connected to the load interface (70) and being connected to the microprocessor (50) by means of a sampling circuit (80); the relay (30) being connected between the power supply interface (60) and the load interface (70) and being connected to the microprocessor (50); the temperature sensor (10) being connected to the microprocessor (50) by means of a signal input circuit (90); and the button (40) being connected to the microprocessor (50). The load thermal protection module can set and store different operating temperatures and currents, such that when the current transformer (20) detects that the load current reaches a set value or the temperature sensor (10) detects that the load temperature reaches a set value, the microprocessor (50) controls the relay (30) to shut off the load circuit, thus accomplishing load overcurrent and overtemperature protection.

Description

可调式多点控温的负载热保护模块  Adjustable multi-point temperature controlled thermal protection module
【技术领域】 [Technical Field]
本发明涉及电热负载的超温及过热保护装置， 特别是涉及一种可根据 不同负载或不同的温度保护要求设定温度和电流的可调式多点控温的负载 热保护模块。  The invention relates to an over-temperature and over-temperature protection device for an electric heating load, in particular to an adjustable multi-point temperature-controlled load thermal protection module capable of setting temperature and current according to different loads or different temperature protection requirements.
【背景技术】 【Background technique】
在工业生产及人们生活中使用着各种各样的电器类设备。 电器设备的 性能不仅体现在其使用功能上， 更重要的在于其使用安全性。 由于用电负 载在出现故障时， 会导致负载出现超温过热。 当温度超过正常值时， 会造 成负载短路、 烧毁等情况发生， 从而影响负载的正常使用。 为此， 一般负 载都设有温度开关或温控器， 以使得在负载温度超过设定值时断开电源， 保护设备安全。 然而， 现有的电子或电器设备通常只能进行单点的温度测 量和控制， 即只能按某个设定的温度值进行控制， 而无法根据实际需要对 温度进行连续的多点式调节和控制， 致使其应用范围受到限制。  A variety of electrical equipment is used in industrial production and people's lives. The performance of electrical equipment is not only reflected in its use function, but more importantly its safety. Since the power load is in the event of a fault, the load may overheat and overheat. When the temperature exceeds the normal value, the load will be short-circuited, burned, etc., which will affect the normal use of the load. For this reason, the general load is equipped with a temperature switch or a thermostat to disconnect the power supply when the load temperature exceeds the set value, and to protect the equipment. However, existing electronic or electrical equipment can usually only perform temperature measurement and control at a single point, that is, it can only be controlled according to a certain set temperature value, and continuous multi-point adjustment of temperature cannot be performed according to actual needs. Control, resulting in limited application range.
【发明内容】 [Summary of the Invention]
本发明旨在解决上述问题， 而提供一种可根据需要设置不同温度和电 流， 可对负载的温度和电流进行精确测量， 并可控制大功率输出， 能够同 时对负载进行超温及过流的双重保护， 且应用范围广泛的可调式多点控温 的负载热保护模块。  The present invention aims to solve the above problems, and provides a temperature and current that can be set according to requirements, can accurately measure the temperature and current of the load, and can control the high power output, and can simultaneously overcharge and over-current the load. Dual protection, and a wide range of adjustable multi-point temperature controlled thermal protection modules.
为实现上述目的， 本发明提供一种可调式多点控温的负载热保护模块， 该模块设有用于检测负载温度的温度传感器， 用于检测负载电流的电流互 感器， 用于控制负载通断的继电器， 设置和调整温度、 电流值用的按键， 用于数据处理和控制用的微处理器及与交流电源连接用的电源接口和与用 电负载连接用的负载接口， 所述电流互感器与负载接口相连接， 并通过取 样电路与微处理器连接， 所述继电器连接于电源接口和负载接口之间， 并 与微处理连接， 所述温度传感器通过信号输入电路与微处理连接， 所述按 键与微处理器连接， 且 To achieve the above object, the present invention provides an adjustable multi-point temperature controlled load thermal protection module, the module is provided with a temperature sensor for detecting a load temperature, a current transformer for detecting a load current, and is used for controlling load on and off. Relays, buttons for setting and adjusting temperature and current values, microprocessors for data processing and control, and power interfaces for AC power connections a load interface for electrical load connection, the current transformer is connected to the load interface, and is connected to the microprocessor through a sampling circuit, the relay is connected between the power interface and the load interface, and is connected to the micro processing, The temperature sensor is connected to the microprocessor through a signal input circuit, and the button is connected to the microprocessor, and
该负载热保护模块可设定并存储不同的工作温度和电流值， 使得当电 流互感器检测到负载电流达到设定值时， 或温度传感器检测到负载温度达 到设定值时， 由微处理器控制继电器切断负载电路， 实现负载的过流超温 保护。  The load thermal protection module can set and store different operating temperature and current values, so that when the current transformer detects that the load current reaches the set value, or when the temperature sensor detects that the load temperature reaches the set value, the microprocessor The control relay cuts off the load circuit to achieve overcurrent and overtemperature protection of the load.
温度传感器为非接触式温度传感器， 其通过信号输入电路与微处理器 连接。  The temperature sensor is a non-contact temperature sensor that is connected to the microprocessor via a signal input circuit.
信号输入电路包括电阻 R13、 R14, 二极管 D9、 D10, 电容 Cl l、 C12 , 该信号输入电路经二极管 D9、 D10、 电阻 R13与温度传感器连接， 并经电容 Cl l、 C12、 电阻 R14与微处理连接， 将温度传感器测得的负载温度的模拟 信号送到微处理器， 由微处理器转换为数字信号。  The signal input circuit includes resistors R13, R14, diodes D9, D10, capacitors Cl l, C12. The signal input circuit is connected to the temperature sensor via diodes D9, D10, and resistor R13, and is micro-processed through capacitors Cl l, C12, resistor R14. The connection sends an analog signal of the load temperature measured by the temperature sensor to the microprocessor, which is converted into a digital signal by the microprocessor.
所述电流互感器为测量用微型电流互感器， 其通过取样电路与微处理 器连接。  The current transformer is a miniature current transformer for measurement, which is connected to the microprocessor through a sampling circuit.
取样电路包括电阻 R6、 R7、 R8、 R9， 二极管 D6、 D7， 电容 C8、 C9， 该 取样电路经 R6、 R7、 R8及二极管 D6、 D7与电流互感器连接， 并经电容 C8、 C9、 电阻 R9与微处理器连接， 将电流互感器对负载的电流取样信号送到微 处理器， 由微处理器与设定值进行比较和处理， 并经继电器对负载进行通 断控制。  The sampling circuit includes resistors R6, R7, R8, R9, diodes D6, D7, capacitors C8, C9. The sampling circuit is connected to the current transformer via R6, R7, R8 and diodes D6, D7, and through capacitors C8, C9, and resistors. The R9 is connected to the microprocessor, and sends a current sampling signal of the current transformer to the load to the microprocessor, and the microprocessor compares and processes the set value, and performs on-off control of the load through the relay.
继电器分别与电源接口的火线 L及负载接口连接， 并经二极管 Dl l、三 极管 Q1及电阻 R15与微处理器连接。  The relays are respectively connected to the live line L of the power interface and the load interface, and are connected to the microprocessor via the diode D1 l, the transistor Q1 and the resistor R15.
所述电源接口的火线 L与继电器连接， 电源接口的零线与负载接口连 本发明的贡献在于， 其有效解决了现有温控装置温控点单一， 适用范 围小等问题。 本发明由于设置了温度传感器和电流互感器， 因此可同时对 负载的温度和电流进行精确测量， 温度测量的误差在士 0. 5°C， 所测得的结 果可通过微处理器进行处理和控制， 因而能够同时对负载进行超温及过流 的双重保护。 还由于本发明可设定不同的保护温度和电流值， 因此既可对 同一负载设定不同的温度和电流值， 也可根据所应用的负载的不同设定不 同的温度和电流值， 因此应用范围广泛。 还由于本发明通过大功率继电器 控制负载的通断， 因此可以控制大功率负载输出。 本发明还具有模块化设 计， 体积小巧， 工作可靠等特点。 The fire line L of the power interface is connected with the relay, and the zero line of the power interface is connected with the load interface. The contribution of the invention lies in that the temperature control point of the existing temperature control device is effectively solved, and the applicable range is applicable. Small and other issues. The invention is provided with a temperature sensor and a current transformer, so that the temperature and current of the load can be accurately measured at the same time, and the error of the temperature measurement is at ±0.5 ° C, and the measured result can be processed by the microprocessor and Control, so that the load can be double protected against over-temperature and over-current. Also, since the present invention can set different protection temperature and current values, different temperature and current values can be set for the same load, and different temperature and current values can be set according to the applied load, so the application A wide range. Also, since the present invention controls the on and off of the load through the high power relay, it is possible to control the high power load output. The invention also has the characteristics of modular design, small size and reliable work.
【附图说明】 [Description of the Drawings]
图 1是本发明的整体结构框图。  BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing the overall structure of the present invention.
图 2是本发明的电路原理图。  Figure 2 is a circuit schematic of the present invention.
【具体实施方式】 【detailed description】
下列实施例是对本发明的进一步解释和说明， 对本发明不构成任何限 制。  The following examples are intended to further illustrate and illustrate the invention and are not to be construed as limiting.
参阅图 1，本发明的可调式多点控温的负载热保护模块包括温度传感器 10、 电流互感器 20、 继电器 30、 按键 40、 微处理器 50、 电源接口 60、 负 载接口 70、 取样电路 80及信号输入电路 90。  Referring to FIG. 1 , the adjustable multi-point temperature controlled thermal protection module of the present invention comprises a temperature sensor 10 , a current transformer 20 , a relay 30 , a button 40 , a microprocessor 50 , a power interface 60 , a load interface 70 , and a sampling circuit 80 . And a signal input circuit 90.
如图 1、 图 2所示， 所述温度传感器 10 (RT1 )为非接触式温度传感器， 其用于检测负载的温度。 该温度传感器可以是热敏电阻， 也可以是电阻温 度检测器 （RTD ) 或 IC温度传感器， 本实施例中， 该温度传感器为电阻温 度检测器， 其通过信号输入电路 90与微处理器 50连接， 将所测得的负载 温度数据送到微处理器 50。 所述微处理器 50 (MCU) 为温控用微处理器， 其内设有可读写记忆存储芯片， 存储芯片内可存入负载的额定工作温度和 电流数据， 工作温度和电流数据可通过按键 40写入， 并可根据所应用负载 的需要加以修改。 微处理器 50内还设有 A/D转换单元， 用于将温度数据的 模拟信号转换为数字信号。 As shown in FIG. 1 and FIG. 2, the temperature sensor 10 (RT1) is a non-contact temperature sensor for detecting the temperature of the load. The temperature sensor may be a thermistor or a resistance temperature detector (RTD) or an IC temperature sensor. In this embodiment, the temperature sensor is a resistance temperature detector connected to the microprocessor 50 through the signal input circuit 90. The measured load temperature data is sent to the microprocessor 50. The microprocessor 50 (MCU) is a temperature control microprocessor, and has a readable and writable memory storage chip therein, and the rated working temperature and current data of the load can be stored in the memory chip, and the working temperature and current data can pass. Key 40 is written and can be applied according to the applied load Need to be modified. An A/D conversion unit is also provided in the microprocessor 50 for converting an analog signal of temperature data into a digital signal.
如图 2， 所述信号输入电路 90包括电阻 R13、 R14, 二极管 D9、 D10及 电容 Cl l、 C12 o 该信号输入电路的输入端经二极管 D9、 D10、 电阻 R13与 温度传感器 10连接， 信号输入电路的输出端经电容 Cl l、 C12、 电阻 R14与 微处理器 50连接。 当负载处于工作状态时， 温度传感器 10实时检测负载 的温度， 并通过信号输入电路 90将所测得的负载温度的模拟信号送到微处 理器 50， 由微处理器转换为数字信号， 并与记忆存储芯片内存储的温度设 定值进行比较和控制处理。 如果温度传感器 10所测得的温度达到了温度设 定值， 微处理器 50通过继电器 30切断负载电源， 以保护负载。  As shown in FIG. 2, the signal input circuit 90 includes resistors R13 and R14, diodes D9 and D10, and capacitors Cl1 and C12. The input end of the signal input circuit is connected to the temperature sensor 10 via diodes D9, D10 and R13, and the signal is input. The output of the circuit is connected to the microprocessor 50 via capacitors Cl l, C12 and R14. When the load is in the working state, the temperature sensor 10 detects the temperature of the load in real time, and sends an analog signal of the measured load temperature to the microprocessor 50 through the signal input circuit 90, which is converted into a digital signal by the microprocessor, and The temperature set values stored in the memory storage chip are compared and controlled. If the temperature measured by the temperature sensor 10 reaches the temperature set value, the microprocessor 50 cuts off the load power through the relay 30 to protect the load.
如图 2， 所述电流互感器 20 (CT1 ) 为测量用微型电流互感器， 其用于 精确检测负载电流。 该电流互感器 20串接在负载接口上， 并通过取样电路 80与微处理器 50连接， 将由负载接口所测得的负载电流经取样电路 80送 到微处理器 50进行处理。  As shown in Fig. 2, the current transformer 20 (CT1) is a micro current transformer for measurement, which is used for accurately detecting the load current. The current transformer 20 is connected in series to the load interface, and is connected to the microprocessor 50 through the sampling circuit 80, and the load current measured by the load interface is sent to the microprocessor 50 via the sampling circuit 80 for processing.
图 2中， 所述取样电路 80包括电阻 R6、 R7、 R8、 R9， 二极管 D6、 D7 及电容 C8、 C9， 该取样电路 80的输入端经 R6、 R7、 R8及二极管 D6、 D7与 电流互感器 20连接， 取样电路 80的输出端经电容 C8、 C9、 电阻 R9与微处 理器 50连接。 取样电路 80由电流互感器 20获得负载电流的取样信号， 并 将该电流取样信号送到微处理器 50，由微处理器与设定值进行比较和处理， 如果电流互感器 20所测得的负载电流达到了设定值， 则微处理器 50通过 继电器 30切断负载电源， 以保护负载。  In FIG. 2, the sampling circuit 80 includes resistors R6, R7, R8, and R9, diodes D6 and D7, and capacitors C8 and C9. The input terminal of the sampling circuit 80 is responsive to current through R6, R7, and R8 and diodes D6 and D7. The device 20 is connected, and the output of the sampling circuit 80 is connected to the microprocessor 50 via capacitors C8, C9 and R9. The sampling circuit 80 obtains the sampling signal of the load current from the current transformer 20, and sends the current sampling signal to the microprocessor 50, which is compared and processed by the microprocessor with the set value, if the current transformer 20 measures When the load current reaches the set value, the microprocessor 50 cuts off the load power through the relay 30 to protect the load.
所述继电器 30是负载通断的开关器件， 本实施例中， 该继电器 30为 大功率继电器， 其可用于 40A〜60A的大功率负载的连通或断开控制。 如图 2， 继电器 30的 4脚与电源接口 60的火线 L连接， 继电器 30的 3脚与负 载接口 70连接， 负载接口还与电源接口 60的零线 N串接。 继电器 30的 1 脚、 2脚经二极管 Dl l、 三极管 Q1及电阻 R15与微处理器 50连接， 由微处 理器 50控制其触点闭合或断开。 The relay 30 is a load switching device. In this embodiment, the relay 30 is a high power relay, which can be used for the connection or disconnection control of a high power load of 40A to 60A. As shown in FIG. 2, the 4 pin of the relay 30 is connected to the live line L of the power interface 60, the 3 pin of the relay 30 is connected to the load interface 70, and the load interface is also connected in series with the neutral line N of the power interface 60. The 1st and 2nd pins of the relay 30 are connected to the microprocessor 50 via the diode D1 l, the transistor Q1 and the resistor R15. The processor 50 controls its contacts to close or open.
本实施例中， 所述按键 40可以是通用按键， 其通过电阻 R18、 R19与 微处理器 50连接。通过该按键可输入设定的负载额定工作温度和电流数据， 并可根据需要加以修改。 所述电源接口 60和负载接口 70为通用插接式接 口。  In this embodiment, the button 40 can be a universal button that is connected to the microprocessor 50 through resistors R18 and R19. This button allows you to enter the set load rated operating temperature and current data and can be modified as needed. The power interface 60 and the load interface 70 are universal plug-in interfaces.
籍此， 本发明通过设定并存储负载的不同的工作温度和电流值， 使得 当电流互感器 20检测到负载电流达到设定值时， 或温度传感器 10检测到 负载温度达到设定值时， 由微处理器 50控制继电器 30切断负载电路， 实 现负载的过流超温保护。  Accordingly, the present invention sets and stores different operating temperature and current values of the load such that when the current transformer 20 detects that the load current reaches the set value, or when the temperature sensor 10 detects that the load temperature reaches the set value, The relay 30 is controlled by the microprocessor 50 to cut off the load circuit to achieve overcurrent and overtemperature protection of the load.
尽管通过以上实施例对本发明进行了揭示， 但本发明的保护范围并不 局限于此， 在不偏离本发明构思的条件下， 对以上各构件所做的变形、 替 换等均将落入本发明的权利要求范围内。  Although the present invention has been disclosed by the above embodiments, the scope of the present invention is not limited thereto, and variations, substitutions, and the like of the above components will fall within the scope of the present invention. Within the scope of the claims.

Claims

权 利 要 求 Rights request
1、 一种可调式多点控温的负载热保护模块， 其特征在于， 该模块设有 用于检测负载温度的温度传感器 （10)， 用于检测负载电流的电流互感器 (20)， 用于控制负载通断的继电器 （30)， 设置和调整温度、 电流值用的 按键 （40)， 用于数据处理和控制用的微处理器 （50)及与交流电源连接用 的电源接口 （60) 和与用电负载连接用的负载接口 （70)， 所述电流互感器 (20) 与负载接口 （70) 相连接， 并通过取样电路 （80) 与微处理器 （50) 连接， 所述继电器 （30) 连接于电源接口 （60) 和负载接口 （70) 之间， 并与微处理 （50) 连接， 所述温度传感器 （10) 通过信号输入电路 （90) 与微处理 （50) 连接， 所述按键 （40) 与微处理器 （50) 连接， 且 1. A tunable multi-point temperature controlled thermal protection module, characterized in that the module is provided with a temperature sensor (10) for detecting a load temperature, a current transformer (20) for detecting a load current, Relay (30) for controlling load switching, button (40) for setting and adjusting temperature and current value, microprocessor (50) for data processing and control, and power connector for connecting to AC power supply (60) And a load interface (70) for connecting to the electrical load, the current transformer (20) is connected to the load interface (70), and is connected to the microprocessor (50) through a sampling circuit (80), the relay (30) is connected between the power interface (60) and the load interface (70) and connected to the microprocessor (50), and the temperature sensor (10) is connected to the microprocessor (50) through the signal input circuit (90). The button (40) is coupled to the microprocessor (50), and
该负载热保护模块可设定并存储不同的工作温度和电流值， 使得当电 流互感器 （20) 检测到负载电流达到设定值时， 或温度传感器 （10) 检测 到负载温度达到设定值时， 由微处理器 （50) 控制继电器 （30) 切断负载 电路， 实现负载的过流超温保护。  The load thermal protection module can set and store different operating temperature and current values, so that when the current transformer (20) detects that the load current reaches the set value, or the temperature sensor (10) detects that the load temperature reaches the set value When the microprocessor (50) controls the relay (30) to cut off the load circuit, the overcurrent protection of the load is realized.
2、 如权利要求 1所述的可调式多点控温的负载热保护模块， 其特征在 于， 所述温度传感器 （10) 为非接触式温度传感器， 其通过信号输入电路 2. The adjustable multi-point temperature controlled load thermal protection module according to claim 1, wherein the temperature sensor (10) is a non-contact temperature sensor that passes through a signal input circuit.
(90) 与微处理器 （50) 连接。 (90) Connect to the microprocessor (50).
3、 如权利要求 2所述的可调式多点控温的负载热保护模块， 其特征在 于， 所述信号输入电路 （90) 包括电阻 （R13、 R14)、 二极管 （D9、 D10)、 电容 （Cll、 C12), 该信号输入电路经二极管 （D9、 D10)、 电阻 （R13) 与 温度传感器连接， 并经电容 （Cll、 C12)、 电阻 （R14) 与微处理器 （50) 连接， 将温度传感器（10)测得的负载温度的模拟信号送到微处理器（50)， 由微处理器转换为数字信号。  3. The adjustable multi-point temperature controlled thermal protection module according to claim 2, wherein the signal input circuit (90) comprises resistors (R13, R14), diodes (D9, D10), capacitors ( C11, C12), the signal input circuit is connected to the temperature sensor via a diode (D9, D10) and a resistor (R13), and is connected to the microprocessor (50) via a capacitor (C11, C12) and a resistor (R14) to set the temperature. The analog signal of the measured load temperature of the sensor (10) is sent to the microprocessor (50), which is converted by the microprocessor into a digital signal.
4、 如权利要求 1所述的可调式多点控温的负载热保护模块， 其特征在 于，所述电流互感器（20)为测量用微型电流互感器，其通过取样电路（80) 与微处理器 （50) 连接。 4. The adjustable multi-point temperature controlled load thermal protection module according to claim 1, wherein the current transformer (20) is a micro current transformer for measurement, which passes through a sampling circuit (80). Connect to the microprocessor (50).
5、 如权利要求 4所述的可调式多点控温的负载热保护模块， 其特征在 于， 所述取样电路 （80) 包括电阻 （R6、 R7、 R8、 R9)、 二极管 （D6、 D7)、 电容 （C8、 C9)， 该取样电路经 （R6、 R7、 R8) 及二极管 （D6、 D7) 与电流 互感器 （20) 连接， 并经电容 （C8、 C9)、 电阻 （R9) 与微处理器 （50) 连 接， 将电流互感器 （20) 对负载的电流取样信号送到微处理器 （50)， 由微 处理器与设定值进行比较和处理， 并经继电器 （30)对负载进行通断控制。  5. The adjustable multi-point temperature controlled thermal protection module according to claim 4, wherein the sampling circuit (80) comprises resistors (R6, R7, R8, R9) and diodes (D6, D7). Capacitor (C8, C9), the sampling circuit is connected to the current transformer (20) via (R6, R7, R8) and diode (D6, D7), and through the capacitor (C8, C9), resistor (R9) and micro The processor (50) is connected, and the current sampling signal of the current transformer (20) to the load is sent to the microprocessor (50), which is compared and processed by the microprocessor and set by the relay (30). Perform on/off control.
6、 如权利要求 1所述的可调式多点控温的负载热保护模块， 其特征在 于， 所述继电器（30)分别与电源接口 （60) 的火线 （L)及负载接口 （70) 连接， 并经二极管 （Dll)、 三极管 （Q1) 及电阻 （R15) 与微处理器 （50) 连接。  6. The adjustable multi-point temperature controlled load thermal protection module according to claim 1, wherein the relay (30) is respectively connected to a live line (L) and a load interface (70) of the power interface (60). And connected to the microprocessor (50) via diode (Dll), transistor (Q1) and resistor (R15).
7、 如权利要求 1所述的可调式多点控温的负载热保护模块， 其特征在 于， 所述电源接口 （60) 的火线 （L)与继电器（30)连接， 电源接口 （60) 的零线与负载接口 （70) 连接。  7. The adjustable multi-point temperature controlled load thermal protection module according to claim 1, wherein the power line (L) of the power interface (60) is connected to the relay (30), and the power interface (60) The neutral line is connected to the load interface (70).
PCT/CN2013/088822 2013-12-07 2013-12-07 Adjustable multipoint temperature-controlled load thermal protection module WO2015081575A1 (en)

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