CN111486599A - Electric water heater electric leakage detection system and electric water heater - Google Patents

Electric water heater electric leakage detection system and electric water heater Download PDF

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CN111486599A
CN111486599A CN202010201734.1A CN202010201734A CN111486599A CN 111486599 A CN111486599 A CN 111486599A CN 202010201734 A CN202010201734 A CN 202010201734A CN 111486599 A CN111486599 A CN 111486599A
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water heater
electric
electric water
leakage detection
detection system
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CN111486599B (en
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艾穗江
李鹏飞
邓海燕
徐扬
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Guangdong Macro Gas Appliance Co Ltd
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Guangdong Macro Gas Appliance Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/56—Testing of electric apparatus

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

本发明公开一种电热水器漏电检测系统，包括连接在电源接头地线和墙壁之间的漏电检测电路；其特征在于，所述漏电检测电路通过光电耦合器与电热水器的主控制器连接，所述光电耦合器的输入端接地线漏电检测回路，所述光电耦合器的输出端接所述主控制器；所述主控制器检测所述光电耦合器是否有＞3秒的高电平输出，如果有，则断开控制电加热器的继电器；继电器断开后，所述主控制器继续所述检测光电耦合器是否有＞1秒的高电平输出，如果有，则判断为环境地线带电，如果无，则判断为电热水器自身漏电。本发明还公开一种电热水器。The invention discloses a leakage detection system for an electric water heater, comprising a leakage detection circuit connected between a ground wire of a power supply connector and a wall; the leakage detection circuit is characterized in that the leakage detection circuit is connected with the main controller of the electric water heater through a photocoupler. The ground wire leakage detection loop of the input end of the optocoupler, the output end of the optocoupler is connected to the main controller; the main controller detects whether the optocoupler has a high level output > 3 seconds, If there is, then disconnect the relay that controls the electric heater; after the relay is disconnected, the main controller continues to detect whether the photocoupler has a high-level output > 1 second, if there is, it is determined as the environmental ground wire Live, if not, it is judged that the electric water heater itself is leaking. The invention also discloses an electric water heater.

Description

一种电热水器漏电检测系统及电热水器Electric water heater leakage detection system and electric water heater

技术领域technical field

本发明涉及电热水器技术领域，尤其涉及一种电热水器漏电检测系统及电热水器。The invention relates to the technical field of electric water heaters, in particular to an electric water heater leakage detection system and an electric water heater.

背景技术Background technique

电热水器是指以电作为能源进行加热的热水器，在使用过程中，由于热水器内流动的水和人体直接接触，一旦漏电，电流通过水的传递会通过人体，造成人体因漏电而危及生命安全。虽然电热水器本身设置有绝缘保护，但是当使用老化或着其他原因造成绝缘损坏后，热水器同样存在漏电危险。Electric water heater refers to a water heater that uses electricity as an energy source for heating. During use, because the water flowing in the water heater is in direct contact with the human body, once electricity leaks, the current will pass through the water through the human body, causing the human body to endanger life due to electricity leakage. Although the electric water heater itself is provided with insulation protection, when the insulation is damaged due to aging or other reasons, the water heater is also in danger of leakage.

目前，电热水器防漏电保护方式多采用水电阻(防电墙)的方法进行防触电保护，使用地线带电指示灯与墙壁大地形成回路，指示灯点亮提醒用户机器漏电。但中国家庭电网接地系统普遍存在缺地线或地线虚接的情况，电热水器漏电可分为热水器绝缘失效和地线反向带电两类，该技术无法区分是环境带电引起的还是电热水器自身漏电引起的，存不良体验。At present, the electric water heater anti-leakage protection method mostly adopts the method of water resistance (electricity-proof wall) to protect against electric shock, and uses the ground wire live indicator to form a loop with the wall and the earth, and the indicator light is lit to remind the user of the leakage of the machine. However, the grounding system of China's home power grid generally has the situation of lack of ground wire or virtual connection of the ground wire. Electric water heater leakage can be divided into two categories: water heater insulation failure and reverse charging of the ground wire. This technology cannot distinguish whether it is caused by environmental charging or the electric water heater itself. Caused by leakage, there is a bad experience.

发明内容SUMMARY OF THE INVENTION

针对现有技术中存在的问题，本发明的目的在于提供一种能自动区分热水器绝缘失效(自身漏电)和地线反向带电的电热水器漏电检测系统。In view of the problems existing in the prior art, the purpose of the present invention is to provide an electric water heater leakage detection system that can automatically distinguish between the water heater insulation failure (self-leakage) and the reverse charging of the ground wire.

本发明还提供一种具有上述漏电检测系统的电热水器。The present invention also provides an electric water heater with the above leakage detection system.

为达到以上目的，本发明采用如下技术方案。In order to achieve the above objects, the present invention adopts the following technical solutions.

一种电热水器漏电检测系统，包括连接在电源接头地线和墙壁之间的漏电检测电路；其特征在于，所述漏电检测电路通过光电耦合器与电热水器的主控制器连接，所述光电耦合器的输入端接地线漏电检测回路，所述光电耦合器的输出端接所述主控制器；所述主控制器检测所述光电耦合器是否有＞3秒的高电平输出，如果有，则断开控制电加热器的继电器；继电器断开后，所述主控制器继续所述检测光电耦合器是否有＞1秒的高电平输出，如果有，则判断为环境地线带电，如果无，则判断为电热水器自身漏电。A leakage detection system for an electric water heater, comprising a leakage detection circuit connected between a ground wire of a power connector and a wall; characterized in that, the leakage detection circuit is connected to a main controller of an electric water heater through a photoelectric coupler, and the photoelectric coupling The ground wire leakage detection loop of the input end of the photoelectric coupler is connected to the main controller; the main controller detects whether the photoelectric coupler has a high level output > 3 seconds, and if so, Then disconnect the relay that controls the electric heater; after the relay is disconnected, the main controller continues to detect whether the photocoupler has a high level output > 1 second, if there is, it is judged that the environmental ground wire is charged, if No, it is judged that the electric water heater itself is leaking.

更为优选的是，在所述主控制器上连接有显示器，通过所述显示器显示不同的代码来区分环境地线带电和自身漏电。More preferably, a display is connected to the main controller, and different codes are displayed on the display to distinguish the charging of the ambient ground wire and the leakage of the self-current.

更为优选的是，所述光电耦合器的输入端串联有二极管、第一电阻，所述光电耦合器的输出端串联有第二电阻。More preferably, the input end of the optocoupler is connected in series with a diode and a first resistor, and the output end of the optocoupler is connected in series with a second resistor.

更为优选的是，所述第一电阻的阻值在20K-150KΩ间选取，所述第二电阻的阻值为1KΩ。More preferably, the resistance value of the first resistor is selected from 20K-150KΩ, and the resistance value of the second resistor is 1KΩ.

更为优选的是，所述主控器通过通信模块与云平台连接，维修人员通过云平台了解漏电故障信息。More preferably, the main controller is connected to the cloud platform through a communication module, and maintenance personnel can learn the leakage fault information through the cloud platform.

更为优选的是，所述主控器通过通信模块与智能终端连接，电热水器故障信息通过智能终端通知用户。More preferably, the main controller is connected to the intelligent terminal through a communication module, and the fault information of the electric water heater is notified to the user through the intelligent terminal.

更为优选的是，所述通信模块为WiFi模块、蓝牙模块或3G/4G/5G模块。More preferably, the communication module is a WiFi module, a Bluetooth module or a 3G/4G/5G module.

更为优选的是，所述智能终端为手机或平板电脑。More preferably, the smart terminal is a mobile phone or a tablet computer.

一种电热水器，其特征在于，具有如上所述的电热水器漏电检测系统。An electric water heater is characterized in that it has the electric water heater leakage detection system as described above.

本发明的有益效果是：The beneficial effects of the present invention are:

与现有技术相比，本发明通过将漏电检测电路接入电热水器主控制，采用专门的漏电判断方法，可以判断出电热水器漏电部位，并通过屏幕显示出来，提醒用户或维修工快速判断故障点，利于故障检修。同时，通过区分不同的故障，在仅有电加热器漏电时，自动切断电加热器电源，防止电加热器继续漏电并维持电热水器继续出水，不影响当次用水；在环境地线反向漏电时，自动切断电加热器电源并中断电热水器出水。Compared with the prior art, by connecting the leakage detection circuit to the main control of the electric water heater, the present invention adopts a special leakage judgment method to determine the leakage location of the electric water heater and display it on the screen to remind users or maintenance workers to quickly judge the fault. point to facilitate troubleshooting. At the same time, by distinguishing different faults, when only the electric heater leaks electricity, the power supply of the electric heater is automatically cut off to prevent the electric heater from continuing to leak electricity and maintain the electric water heater to continue to discharge water, without affecting the current water consumption; the reverse leakage of electricity in the environmental ground wire When the electric heater is turned off, the power supply of the electric heater is automatically cut off and the water outlet of the electric water heater is interrupted.

附图说明Description of drawings

图1所示为本发明提供的电热水器漏电检测系统结构框图。FIG. 1 is a block diagram showing the structure of the electric water heater leakage detection system provided by the present invention.

图2所示为漏电检测电路的电路图。Figure 2 shows the circuit diagram of the leakage detection circuit.

图3所示为本发明提供的电热水器漏电检测系统工作流程图。FIG. 3 is a working flow chart of the electric water heater leakage detection system provided by the present invention.

附图标记说明：Description of reference numbers:

1：地线，2：墙壁，3：漏电检测电路，4：光电耦合器，5：主控制器，6：电加热器，7：继电器，8：操作显示器。1: Ground wire, 2: Wall, 3: Leakage detection circuit, 4: Photocoupler, 5: Main controller, 6: Electric heater, 7: Relay, 8: Operation display.

具体实施方式Detailed ways

下面结合说明书的附图，对本发明的具体实施方式作进一步的描述，使本发明的技术方案及其有益效果更加清楚、明确。下面通过参考附图描述实施例是示例性的，旨在解释本发明，而不能理解为对本发明的限制。The specific embodiments of the present invention will be further described below with reference to the accompanying drawings in the specification, so as to make the technical solutions of the present invention and the beneficial effects thereof more clear and definite. The embodiments described below by referring to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

本发明的附加方面和优点将在下面的描述部分中变得明显，或通过本发明的实践了解到。Additional aspects and advantages of the present invention will become apparent in the description section that follows, or will be learned by practice of the present invention.

实施例1Example 1

如图1-图3所示，一种电热水器漏电检测系统，包括连接在电源接头地线1和墙壁2之间的漏电检测电路3；其特征在于，所述漏电检测电路3通过光电耦合器4与电热水器的主控制器5连接，所述光电耦合器4的输入端接地线漏电检测回路，所述光电耦合器4的输出端接所述主控制器5；所述主控制器5检测所述光电耦合器4是否有＞3秒的高电平输出，如果有，则断开控制电加热器6的继电器7；继电器7断开后所述主控制器5继续所述检测光电耦合器是否有＞1秒的高电平输出，如果有，则判断为环境地线带电，如果无，则判断为电热水器自身漏电。As shown in Fig. 1-Fig. 3, an electric water heater leakage detection system includes a leakage detection circuit 3 connected between the ground wire 1 of the power connector and the wall 2; 4 is connected to the main controller 5 of the electric water heater, the input end of the photoelectric coupler 4 is a ground wire leakage detection circuit, and the output end of the photoelectric coupler 4 is connected to the main controller 5; the main controller 5 detects Whether the optocoupler 4 has a high level output > 3 seconds, if so, disconnect the relay 7 that controls the electric heater 6; after the relay 7 is disconnected, the main controller 5 continues to detect the optocoupler Whether there is a high level output > 1 second, if there is, it is judged that the environmental ground wire is charged, if not, it is judged that the electric water heater itself is leaking.

其中，为方便用户更好地了解漏电故障信息，利用故障代码EL代表环境地线带电，利用故障代码DL代表电热水器自身漏电。具体工作时，利用与主控制器5连接的操作显示器8来显示不同故障代码。Among them, in order to facilitate the user to better understand the leakage fault information, the fault code EL is used to represent the live ground wire of the environment, and the fault code DL is used to represent the leakage of the electric water heater itself. During specific work, the operation display 8 connected with the main controller 5 is used to display different fault codes.

本实施例中，优选所述主控制器5为单片机。优选在所述光电耦合器4的输入端串联有二极管D0、第一电阻R0，优选在所述光电耦合器4的输出端串联有第二电阻R1。所述第一电阻的阻值在20K-150KΩ间选取，所述第二电阻的阻值为1KΩ。In this embodiment, preferably, the main controller 5 is a single-chip microcomputer. Preferably, a diode D0 and a first resistor R0 are connected in series with the input end of the optocoupler 4 , and preferably a second resistor R1 is connected in series with the output end of the optocoupler 4 . The resistance value of the first resistor is selected from 20K-150KΩ, and the resistance value of the second resistor is 1KΩ.

进一步地，在所述主控制器5上还连接有通信模块，所述主控器5通过所述通信模块与云平台和/或智能终端连接，以便维修人员通过云平台或用户通过智能终端了解漏电故障信息。本实施例中，优选所述通信模块为WiFi模块，优选所述智能终端为手机。在其他实施方式中，所述通信模块为蓝牙模块或3G/4G/5G模块，所述智能终端为平板电脑；不限于本实施例。Further, a communication module is also connected on the main controller 5, and the main controller 5 is connected with the cloud platform and/or the intelligent terminal through the communication module, so that maintenance personnel can understand through the cloud platform or the user through the intelligent terminal. Leakage fault information. In this embodiment, preferably the communication module is a WiFi module, and the smart terminal is preferably a mobile phone. In other embodiments, the communication module is a Bluetooth module or a 3G/4G/5G module, and the smart terminal is a tablet computer; it is not limited to this embodiment.

与现有技术相比，本实施例提供的一种电热水器漏电检测系统，通过将漏电检测电路接入电热水器主控制，采用专门的漏电判断方法，可以判断出电热水器漏电部位，并通过屏幕显示出来，提醒用户或维修工快速判断故障点，利于故障检修。同时，通过区分不同的故障，在仅有电加热器漏电时，自动切断电加热器电源，防止电加热器继续漏电并维持电热水器继续出水，不影响当次用水；在环境地线反向漏电时，自动切断电加热器电源并中断电热水器出水。电热水器的出水中断和维持可通过与主控制器连接的电动阀或电磁阀来实现。Compared with the prior art, the electric water heater leakage detection system provided by this embodiment can determine the leakage location of the electric water heater by connecting the electric leakage detection circuit to the main control of the electric water heater and adopt a special leakage judgment method, and through the screen It is displayed to remind users or maintenance workers to quickly determine the fault point, which is conducive to troubleshooting. At the same time, by distinguishing different faults, when only the electric heater leaks electricity, the power supply of the electric heater is automatically cut off to prevent the electric heater from continuing to leak electricity and maintain the electric water heater to continue to discharge water, without affecting the current water consumption; the reverse leakage of electricity in the environmental ground wire When the electric heater is turned off, the power supply of the electric heater is automatically cut off and the water outlet of the electric water heater is interrupted. The interruption and maintenance of the water outlet of the electric water heater can be realized by the electric valve or solenoid valve connected with the main controller.

实施例2Example 2

一种电热水器，其特征在于，具有如实施例1所述的电热水器漏电检测系统。An electric water heater is characterized in that it has the electric water heater leakage detection system as described in Embodiment 1.

本实施例提供的一种电热水器，其具有实施例1的所有技术效果，至于电热水器的具体结构，可以采用现有已知的或将来能够实现的各种结构，这里不再赘述。The electric water heater provided in this embodiment has all the technical effects of Embodiment 1. As for the specific structure of the electric water heater, various structures known in the present or that can be realized in the future can be adopted, which will not be repeated here.

通过上述的结构和原理的描述，所属技术领域的技术人员应当理解，本发明不局限于上述的具体实施方式，在本发明基础上采用本领域公知技术的改进和替代均落在本发明的保护范围，本发明的保护范围应由各权利要求项及其等同物限定之。具体实施方式中未阐述的部分均为现有技术或公知常识。Through the description of the above-mentioned structure and principle, those skilled in the art should understand that the present invention is not limited to the above-mentioned specific embodiments, and the improvement and substitution of the technology known in the art on the basis of the present invention all fall within the protection of the present invention Scope, the protection scope of the present invention shall be defined by the respective claims and their equivalents. The parts not described in the detailed description are the prior art or common knowledge.

Claims (9)

1. An electric leakage detection system of an electric water heater comprises an electric leakage detection circuit connected between a power supply connector ground wire and a wall; the leakage detection circuit is connected with a main controller of the electric water heater through a photoelectric coupler, the input end of the photoelectric coupler is grounded to a leakage detection loop, and the output end of the photoelectric coupler is connected with the main controller; the main controller detects whether the photoelectric coupler has high level output for more than 3 seconds, if so, the relay for controlling the electric heater is switched off; after the relay is disconnected, the main controller continues to detect whether the photoelectric coupler has high level output for more than 1 second, if yes, the environment ground wire is judged to be electrified, and if not, the electric water heater is judged to have electric leakage.
2. The electric leakage detection system of the electric water heater according to claim 1, wherein a display is connected to the main controller, and different codes are displayed by the display to distinguish between the environment ground line electrification and the self electric leakage.
3. The electric water heater leakage detection system of claim 1, wherein the input end of the photoelectric coupler is connected in series with a diode and a first resistor, and the output end of the photoelectric coupler is connected in series with a second resistor.
4. An electrical leakage detecting system of an electric water heater as claimed in claim 3, wherein the resistance of the first resistor is selected from 20K-150K Ω, and the resistance of the second resistor is 1K Ω.
5. The electric water heater electric leakage detection system of claim 1, wherein the master controller is connected with the cloud platform through the communication module, and maintenance personnel can know the electric leakage fault information through the cloud platform.
6. The electric water heater leakage detection system of claim 1, wherein the master controller is connected to the intelligent terminal through the communication module, and the electric water heater fault information is notified to the user through the intelligent terminal.
7. An electric leakage detection system of an electric water heater according to claim 5 or 6, wherein the communication module is a WiFi module, a Bluetooth module or a 3G/4G/5G module.
8. The electric leakage detection system of the electric water heater according to claim 6, wherein the intelligent terminal is a mobile phone or a tablet computer.
9. An electric water heater having an electric leakage detecting system of any one of claims 1-8.
CN202010201734.1A 2020-03-20 2020-03-20 Electric water heater leakage detection system and electric water heater Active CN111486599B (en)

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CN113758012A (en) * 2021-08-10 2021-12-07 广东万家乐燃气具有限公司 Double ground wire fixing device for electric water heater and electric water heater
CN114061154A (en) * 2021-11-02 2022-02-18 广东万家乐燃气具有限公司 Water heater movable controller electric leakage alarm system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113758012A (en) * 2021-08-10 2021-12-07 广东万家乐燃气具有限公司 Double ground wire fixing device for electric water heater and electric water heater
CN114061154A (en) * 2021-11-02 2022-02-18 广东万家乐燃气具有限公司 Water heater movable controller electric leakage alarm system

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