Compact residual chlorine sensor

Abstract

This utility model discloses a compact residual chlorine sensor, solving the problems of complex connections, large space occupation, and low efficiency of existing sensors. The sensor includes a connector, a mounting base, a signal plug, a patch socket, an electrochemical electrode module, and a circuit board. The electrochemical electrode module collects voltage signals through electrochemical reactions, which are then processed by the circuit board to calculate the residual chlorine concentration. The circuit board is embedded inside the mounting base and is used to excite the electrochemical electrode module and process the electrical signals. The signal plug adopts a standardized pluggable connector, with one end connected to the electrochemical electrode module via a wire and integrally encapsulated in the connector, and the other end forming a detachable fit with the patch socket. The patch socket is fixed to the surface of the circuit board inside the mounting base and matches the signal plug to achieve electrical connection. The signal plug and patch socket achieve electrical connection between the electrochemical electrode module and the circuit board through a pluggable connection, and the signal plug is inserted into the patch socket when the connector and mounting base are threadedly locked.

Description

Technical Field

[0001] This utility model relates to a compact residual chlorine sensor. Background Technology

[0002] A residual chlorine sensor is a device used to measure the concentration of residual chlorine (such as hypochlorous acid and hypochlorite ions) in water. It is widely used in drinking water treatment, industrial circulating water monitoring, swimming pool management, and wastewater treatment. Its working principle is mainly based on an electrochemical reaction. A constant voltage between the working electrode and the counter electrode triggers the redox reaction of residual chlorine, generating a current signal proportional to the concentration, thus achieving accurate measurement. Some sensors use a diaphragm design, detecting residual chlorine through diffusion and reduction reactions, while constant voltage types are widely used due to their simple structure and high stability. Existing residual chlorine sensors have complex chip and circuit board connections, occupy a large amount of space, and have low efficiency. Utility Model Content

[0003] This invention proposes a compact residual chlorine sensor, which solves the problems of complex electrochemical electrode modules and circuit board connections, large space occupation, and low efficiency of existing sensors.

[0004] According to one aspect of the embodiments, a residual chlorine sensor includes a connector, a mounting base, a signal plug, a patch socket, an electrochemical electrode module, and a circuit board. The electrochemical electrode module collects a voltage signal through an electrochemical reaction, which is then processed by the circuit board to calculate the residual chlorine concentration. The circuit board is embedded inside the mounting base and is used to excite the electrochemical electrode module and process the electrical signal. The signal plug adopts a standardized pluggable connector, with one end connected to the electrochemical electrode module via a wire and integrally encapsulated within the connector, and the other end forming a detachable fit with the patch socket. The patch socket is fixed to the surface of the circuit board inside the mounting base and matches the signal plug to achieve electrical connection.

[0005] In some examples, the connector and the mounting base are joined by a threaded locking structure, and a rubber sealing ring is provided at the joint.

[0006] In some examples, the connector and the mounting base are made of polyoxymethylene.

[0007] In some examples, the water absorption rate of the connector and the mounting base is less than 0.02%.

[0008] In some examples, the connection between the signal plug and the wire of the electrochemical electrode module is encapsulated with epoxy resin sealant, which has waterproof and high temperature resistance properties.

[0009] In some examples, the signal plug and the patch socket are connected by a plug-in connection to achieve the electrical connection between the electrochemical electrode module and the circuit board, and the signal plug is inserted into the patch socket when the connector and the mounting base are threaded together.

[0010] In some examples, the signal plug uses a 2.5mm pluggable connector.

[0011] In some examples, the signal plug is adapted to the standardized interface of the patch socket for different sensor models.

[0012] In some examples, the electrochemical electrode module employs an Ag / AgCl system electrochemical residual chlorine electrode. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a compact residual chlorine sensor according to an embodiment of the present invention. Detailed Implementation

[0014] like Figure 1 As shown, the residual chlorine sensor adopts a modular plug-in structure, including a connector 1, a mounting base 2, a signal plug 3, a patch socket 4, an electrochemical electrode module 5, and a circuit board 6. The electrochemical electrode module 5, as the sensitive part for residual chlorine detection, collects voltage signals through an electrochemical reaction, which are then processed by the circuit board 6 to calculate the residual chlorine concentration. The circuit board 6 is embedded inside the mounting base 2, responsible for stimulating the electrochemical reaction of the electrode module 5 and processing the output electrical signal. The circuit structure of the circuit board 6 and the processing method of the signals collected by the electrochemical electrode module are common knowledge to those skilled in the art and are not directly related to the innovation of this utility model, therefore, they will not be described in detail here. The signal plug 3 can be a 2.5mm pluggable connector, with one end connected to the electrode module 5 via a wire and integrally encapsulated in the connector 1, and the other end forming a detachable fit with the patch socket 4. The patch socket 4 is fixed to the surface of the circuit board 6 inside the mounting base 2, and matches with the signal plug 3 to achieve electrical connection.

[0015] Connector 1 and mounting base 2 are joined by a threaded locking structure, with a silicone rubber sealing ring at the joint to ensure an overall IP68 waterproof rating (dustproof and waterproof to a depth of 1 meter for 30 minutes). The wire connection between signal plug 3 and electrode module 5 is encapsulated with epoxy resin sealant, providing waterproof and high-temperature resistance (-40℃~125℃) to prevent corrosive liquid intrusion. Both the connector and mounting base are made of polyoxymethylene (POM) material with a water absorption rate of less than 0.02%, exhibiting high wear resistance and chemical stability, making them suitable for humid or corrosive environments.

[0016] When the connector 1 and mounting base 2 are threadedly locked, the signal plug 3 is precisely inserted into the surface mount socket 4, establishing a stable electrical connection path between the chip and the circuit board. This design achieves signal transmission through a modular plug-in structure, ensuring the reliability of the electrical connection while facilitating later maintenance and disassembly. The pluggable structure reduces the risk of solder joint failure and improves long-term operational stability. The electrode module and circuit board can be replaced independently, reducing maintenance costs. The standardized interface is compatible with different sensor models and supports functional expansion. In specific embodiments, the standardized interface is compatible with various sensor modules through physical compatibility design (such as size, pin arrangement, and electrical characteristics) and unified communication protocols (such as Modbus and RS485). For example, users can expand functionality by disassembling the currently connected signal plug (such as the signal plug of an electrochemical electrode module) and replacing it with a signal plug compatible with other sensors. The replaced signal plug can connect to sensor modules with different functions, including but not limited to pH sensors, dissolved oxygen sensors, and turbidity sensors. The circuit board automatically identifies the sensor type through the standardized interface and parses its output signal (such as analog voltage and digital pulse) without modifying the hardware or software architecture. The identification and parsing method described herein is common knowledge to those skilled in the art and will not be described in detail here. This design, through modular replacement and communication protocol adaptation, reduces maintenance costs while improving the flexibility and compatibility of the equipment.

[0017] For example, the signal plug can be removed and replaced with a signal plug that connects to a different type of sensor, including but not limited to pH sensor and dissolved oxygen sensor.

[0018] Electrode module 5 can employ an Ag / AgCl system electrochemical residual chlorine electrode, with an operating temperature range of -20℃ to 60℃ (the potting compound is heat-resistant up to 125℃). The sealing design combines a silicone rubber sealing ring with the corrosion resistance of POM material, making it suitable for acidic and alkaline environments. The compact plug-in structure and optimized overall dimensions meet the installation requirements of confined spaces.

Claims

1. A residual chlorine sensor, characterized by, The device includes a connector, a mounting base, a signal plug, a surface mount socket, an electrochemical electrode module, and a circuit board. The electrochemical electrode module collects voltage signals through electrochemical reactions, which are then processed by the circuit board to calculate the residual chlorine concentration. The circuit board is embedded inside the mounting base and is used to excite the electrochemical electrode module and process the electrical signals. The signal plug uses a standardized pluggable connector, with one end connected to the electrochemical electrode module via a wire and integrally encapsulated within the connector, and the other end forming a detachable fit with the surface mount socket. The surface mount socket is fixed to the surface of the circuit board inside the mounting base and matches the signal plug to achieve electrical connection.

2. The residual chlorine sensor according to claim 1, characterized by The connecting seat and the mounting seat are connected by a threaded locking structure.

3. The residual chlorine sensor according to claim 2, characterized in that A rubber sealing ring is provided at the joint between the connecting seat and the mounting seat.

4. The residual chlorine sensor according to claim 1 or 2 or 3, characterized by The connector and the mounting base are made of polyoxymethylene.

5. The residual chlorine sensor according to claim 1, wherein The water absorption rate of the connecting seat and the mounting seat is less than 0.02%.

6. The residual chlorine sensor according to claim 1, wherein The connection between the signal plug and the wire of the electrochemical electrode module is sealed with epoxy resin sealant.

7. The residual chlorine sensor according to claim 1, wherein The signal plug and the patch socket are connected by a plug-in connection to realize the electrical connection between the electrochemical electrode module and the circuit board, and the signal plug is inserted into the patch socket when the connector and the mounting base are threadedly locked.

8. The residual chlorine sensor according to claim 1 or 6 or 7, characterized by The signal plug uses a 2.5mm pluggable connector.

9. The residual chlorine sensor according to claim 1, wherein The standardized interface of the signal plug and the patch socket is compatible with different sensor models.

10. The residual chlorine sensor according to claim 1, wherein The electrochemical electrode module adopts an Ag / AgCl system electrochemical residual chlorine electrode.

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