A water leakage detection device

Abstract

This utility model relates to a water leakage detection device, comprising a PCB board, two copper foil electrodes disposed on the PCB board, and an electronic control board electrically connected to the two copper foil electrodes. The device is characterized in that the two copper foil electrodes are arranged side-by-side with a gap between them, and the PCB board has a through-hole corresponding to the gap. The advantages of this utility model are that water vapor or small water droplets generated in high-temperature and high-humidity environments are less likely to form on the PCB board, reducing false alarms, improving work efficiency, and the overall structure is simple and easy to install and disassemble.

Description

Technical Field

[0001] This utility model relates to the field of water leakage detection, and in particular to a water leakage detection device. Background Technology

[0002] Electric water heaters and water purifiers pose a risk of leakage. If users fail to detect leaks in time, it can lead to water waste, property damage, and even electrical leakage, threatening personal safety. Leak detection devices are typically placed under electric water heaters or water purifiers to detect leaks. Existing leak detection devices usually have two copper foil electrodes on a PCB board. When these electrodes come into contact with water, resistance is generated, which can detect a leak. However, in high-temperature and high-humidity environments, over time, moisture or small water droplets can accumulate on the PCB board between the copper foils, causing false alarms. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a water leakage detection device that can reduce false alarms, in view of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a water leakage detection device, including a PCB board, two copper foil electrodes disposed on the PCB board, and an electronic control board electrically connected to the two copper foil electrodes, characterized in that: the two copper foil electrodes are arranged side by side with a gap between them, and the PCB board has a slot through the gap.

[0005] There are various structures for electrically connecting copper foil electrodes to an electronic control board. Preferably, two copper foil electrodes are connected to wires, the other end of which is a plug, and the electronic control board is provided with a socket corresponding to the plug.

[0006] In order to connect the wire to the copper foil electrode, the wire is soldered to the copper foil electrode.

[0007] To prevent copper foil from oxidizing, the surface of the copper foil electrode is plated with gold.

[0008] To alert the user upon detecting a leak, an alarm electrically connected to the control board is also included.

[0009] Compared with the prior art, the advantages of this utility model are as follows: In this water leakage detection device, two copper foil electrodes are arranged side by side with a gap between them, and slots are passed through the PCB board at the position corresponding to the gap. In this way, water vapor or small water droplets generated in high temperature and high humidity environments are not easy to form on the PCB board, which can reduce false alarms, improve work efficiency, and the whole structure is simple and easy to install and disassemble. Attached Figure Description

[0010] Figure 1This is a schematic diagram of the structure of the water leakage detection device in the embodiment of this utility model;

[0011] Figure 2 This is a schematic diagram of the circuit between the socket and the chip on the PCB in an embodiment of this utility model. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0013] like Figure 1 and Figure 2 The image shows a preferred embodiment of the present invention. This embodiment of a water leakage detection device includes a PCB board 1, two copper foil electrodes 2 disposed on the PCB board 1, an electrical control board 3 electrically connected to the two copper foil electrodes 2, wires 4, a plug 5, a socket 6, and an alarm 7 electrically connected to the electrical control board 3.

[0014] Two copper foil electrodes 2 are arranged side by side with a gap 2a between them. A slot 1a is provided through the PCB board 1 at the position corresponding to the gap 2a. This makes it less likely for water vapor or small water droplets generated in a high temperature and high humidity environment to form on the PCB board, thus reducing false alarms.

[0015] In this embodiment, the wire 4 is soldered to the copper foil electrode 2, and the other end of the wire 4 is a plug 5. The control board 3 is provided with a socket 6 corresponding to the plug 5. The surface of the copper foil electrode 2 has a gold plating layer to prevent oxidation of the copper foil electrode 2.

[0016] In this embodiment, the leak detection device is placed at the bottom of the electric water heater or water purifier. When the bottom of the electric water heater or water purifier leaks, the copper foil electrode 2 will generate resistance when it comes into contact with water. After the electronic control board 3 senses this, it will issue an alarm through the alarm 7 to remind the user to deal with it.

[0017] The lower the TDS of water, the higher its resistance. When the pure water end of the RO machine leaks, the leak detection device will not detect the leak. Generally, the leak detection device will detect water if the TDS of pure water is less than 15 to 20 PPM. By adjusting the test voltage from 2.6V to 2.9V, the leak detection device can detect pure water with a TDS greater than 5 PPM.

[0018] Figure 2 This is a schematic diagram of the circuit between the socket 6 and the chip 11 on the PCB board 1 in this embodiment. The circuit also includes a capacitor 8, a first resistor 9 and a second resistor 10.

[0019] In this circuit, one end of capacitor 8 is grounded, and the other end is connected to chip 11 on PCB board 1; one end of first resistor 9 is connected to chip 11 on PCB board 1, and the other end is connected to socket 6; one end of second resistor 10 is connected to the power supply, and the other end is connected to first resistor 9 and socket 6 respectively, while the other end of socket 6 is grounded. Capacitor 8 can eliminate interference, and first resistor 9 and second resistor 10 play a current-limiting role.

Claims

1. A water leakage detection device, comprising a PCB board (1), two copper foil electrodes (2) arranged on the PCB board (1), and an electric control board (3) electrically connected with the two copper foil electrodes (2), characterized in that: Two copper foil electrodes (2) are arranged side by side with a gap (2a) between them, and the PCB board (1) is provided with a slot hole (1a) corresponding to the position of the gap (2a).

2. The water leak detection apparatus of claim 1, wherein: Two copper foil electrodes (2) are connected with an electric wire (4), the other end of the electric wire (4) is a plug (5), and the electric control board (3) is provided with a socket (6) corresponding to the plug (5).

3. The water leak detection apparatus of claim 2, wherein: The electric wire (4) is welded on the copper foil electrode (2).

4. The water leak detection apparatus of claim 1, wherein: The surface of the copper foil electrode (2) is provided with a gold plating layer.

5. The water leak detection apparatus of claim 1, wherein: An alarm (7) electrically connected with the electric control board (3) is further included.

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