Multifunctional sensor
By integrating a multi-functional sensor with temperature and water level detection capabilities into the NTC housing, the problems of increased cost and leakage risk associated with separate sensors are solved, achieving integrated and sealed sensor design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN BILL ELECTRIC APPLIANCE CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-04-21
AI Technical Summary
The water level sensor and temperature sensor of the existing kettle are separate components, which require separate mounting holes, increasing processing costs and the risk of leakage.
Design a multifunctional sensor that integrates an NTC thermistor and a water level detection electrode into a single NTC housing. The sensor achieves temperature and water level detection through a mounting cavity, eliminating the need for additional mounting holes. Furthermore, it enhances sealing performance through a sealing ring and an insulating structure.
This reduced processing costs, minimized water leakage, and enabled the integrated design of the sensor.
Smart Images
Figure CN224151763U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sensors, specifically to a multifunctional sensor. Background Technology
[0002] Existing kettles typically have water level and temperature detection functions, which are achieved through water level sensors and temperature sensors, respectively. In a typical kettle, the water level sensor and temperature sensor are two separate components. Therefore, corresponding mounting holes need to be made for the water level sensor and temperature sensor on the kettle or heating plate, which increases the manufacturing cost and also relatively increases the probability of leakage.
[0003] Therefore, further improvements are needed. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a multifunctional sensor. By setting an installation cavity inside the NTC housing, the sensor integrates temperature detection and water level detection functions. When using the sensor, the kettle does not need to open an additional installation hole, reducing processing costs and the probability of leakage.
[0005] The purpose of this utility model is achieved as follows:
[0006] A multifunctional sensor includes an NTC housing, an NTC thermistor, and a water level detection electrode. The inner side of the NTC housing has a mounting cavity, and the NTC thermistor is disposed in the mounting cavity. The lower end of the water level detection electrode is inserted into the mounting cavity from top to bottom, and the lower end of the water level detection electrode is connected to a water level electrode lead extending out of the mounting cavity. The outer side of the NTC housing forms a sandwich cavity for mounting a heating plate or container bottom plate. A common electrode lead is provided on the outer side of the NTC housing at a position below the sandwich cavity, and a connection and conductive structure is formed between the common electrode lead and the NTC housing.
[0007] As a specific embodiment, a sealing ring is provided between the outer side of the NTC housing and the mounting cavity.
[0008] As a specific embodiment, an insulating gasket is provided between the interlayer cavity and the common electrode lead.
[0009] As a specific embodiment, a fixing nut is connected to the outside of the NTC housing. The fixing nut and the NTC housing are connected and engaged by a threaded structure. The fixing nut can tighten or loosen the end of the common electrode lead through the threaded structure.
[0010] As a specific embodiment, an insulating sleeve is provided on the outer side of the water level detection electrode, the inner side of the insulating sleeve is tightly fitted with the water level detection electrode, and the lower section of the insulating sleeve extends into the mounting cavity and is tightly fitted with the water level detection electrode and the NTC housing respectively.
[0011] As a specific solution, the water level detection device is made of stainless steel pipe.
[0012] As a specific embodiment, the inner side of the mounting cavity is filled with insulating filler glue, and the lower ends of the NTC thermistor, water level electrode lead, and water level detection electrode are fixed and positioned in the mounting cavity by the insulating filler glue.
[0013] The beneficial effects of this utility model are:
[0014] By setting a mounting cavity inside the NTC housing, the sensor integrates both temperature detection and water level detection functions. When using the sensor, the kettle does not need to have an additional mounting hole, reducing processing costs and the probability of leakage. Attached Figure Description
[0015] Figure 1 This is a cross-sectional view of an embodiment of the present utility model. Figure 1 .
[0016] Figure 2 This is a cross-sectional view of an embodiment of the present utility model. Figure 2 .
[0017] Figure 3 This is an enlarged view of embodiment A of the present invention.
[0018] Figure 4 This is a circuit diagram of an embodiment of the present invention. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] See Figures 1-4 This multifunctional sensor includes an NTC housing 1, an NTC thermistor 2, and a water level detection electrode 3. The inner side of the NTC housing 1 has a mounting cavity 11, in which the NTC thermistor is placed. The lower end of the water level detection electrode 3 is inserted into the mounting cavity 11 from top to bottom. The lower end of the water level detection electrode 3 is connected to a water level electrode lead 4 extending out of the mounting cavity 11. The outer side of the NTC housing 1 forms a double-layer cavity 12 for mounting a heating plate or container bottom plate. A common electrode lead 5 is provided on the outer side of the NTC housing 1 at a position below the double-layer cavity 12. The common electrode lead 5 and the NTC housing 1 form a connection and conduction structure. By setting the mounting cavity 11 inside the NTC housing 1, the sensor integrates the functions of temperature detection and water level detection. When using the sensor, the kettle does not need to open an additional mounting hole, reducing processing costs and the probability of water leakage.
[0021] Since the common electrode lead 5 and the NTC housing 1 form a conductive connection, the NTC housing 1 is equivalent to the grounding terminal of the water level detection electrode 3. The water level detection electrode 3 does not need to be grounded on the heating plate or the bottom plate of the container, which can better meet the EMC requirements.
[0022] Furthermore, a sealing ring 6 is provided between the outer side of the NTC housing 1 and the mounting cavity 11, so that the NTC housing 1 can have good sealing between itself and the heating plate or the bottom plate of the container, reducing the chance of water leakage at the connection point.
[0023] Furthermore, an insulating pad 7 is provided between the interlayer cavity 12 and the common electrode lead 5, so that the heating plate or container bottom plate and the common electrode lead 5 have a good insulation structure.
[0024] Furthermore, a fixing nut 8 is connected to the outside of the NTC housing 1. The fixing nut 8 and the NTC housing 1 are connected and engaged by a threaded structure. The fixing nut 8 tightens or loosens the end of the common pole lead 5 through the threaded structure, so that the common pole lead 5 can be better installed and fixed and is less likely to shift.
[0025] Furthermore, an insulating sleeve 9 is provided on the outer side of the water level detection electrode 3, and the inner side of the insulating sleeve 9 is tightly fitted with the water level detection electrode 3. The lower section of the insulating sleeve 9 extends into the mounting cavity 11 and is tightly fitted with the water level detection electrode 3 and the NTC housing 1 respectively, so that the water level detection electrode 3 and the NTC housing 1 have good insulation.
[0026] Furthermore, the water level detection electrode 3 is made of stainless steel, making it more suitable for products such as kettles.
[0027] Furthermore, the inner side of the mounting cavity 11 is filled with insulating filler 10. The lower ends of the NTC thermistor 2, the water level electrode lead 4, and the water level detection electrode 3 are fixed and positioned in the mounting cavity 11 by the insulating filler 10, which further improves the sealing performance of the mounting cavity 11 and the stability of the relative positions between the NTC thermistor 2, the water level electrode lead 4, and the water level detection electrode 3.
[0028] The above embodiments are merely preferred embodiments of this utility model, and other implementations are also possible. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model, and all such equivalent modifications or substitutions are included within the scope set forth in the claims of this application.
Claims
1. A multi-functional sensor characterized by, The device includes an NTC housing (1), an NTC thermistor (2), and a water level detection electrode (3). The inner side of the NTC housing (1) has a mounting cavity (11). The NTC thermistor is disposed in the mounting cavity (11). The lower end of the water level detection electrode (3) is inserted into the mounting cavity (11) from top to bottom. The lower end of the water level detection electrode (3) is connected to a water level electrode lead (4) that extends out of the mounting cavity (11). The outer side of the NTC housing (1) forms a sandwich cavity (12) for mounting a heating plate or container bottom plate. A common electrode lead (5) is provided on the outer side of the NTC housing (1) at a position below the sandwich cavity (12). The common electrode lead (5) and the NTC housing (1) form a connection and conduction structure.
2. The multi-functional sensor according to claim 1, wherein: A sealing ring (6) is provided between the outer side of the NTC housing (1) and the mounting cavity (11).
3. The multi-functional sensor according to claim 1, wherein: An insulating pad (7) is provided between the interlayer cavity (12) and the common electrode lead (5).
4. The multi-functional sensor according to claim 1, wherein: A fixing nut (8) is connected to the outside of the NTC housing (1). The fixing nut (8) and the NTC housing (1) are connected and engaged by a threaded structure. The fixing nut (8) can tighten or loosen the end of the common pole lead (5) through the threaded structure.
5. The multi-functional sensor according to claim 1, wherein: An insulating sleeve (9) is provided on the outer side of the water level detection electrode (3). The inner side of the insulating sleeve (9) is tightly fitted with the water level detection electrode (3). The lower section of the insulating sleeve (9) extends into the mounting cavity (11) and is tightly fitted with the water level detection electrode (3) and the NTC housing (1) respectively.
6. The multi-functional sensor according to claim 1, wherein: The water level detection electrode (3) is a stainless steel pipe.
7. The multi-functional sensor according to any one of claims 1 to 6, characterized by: The inner side of the mounting cavity (11) is filled with insulating filler glue (10), and the lower ends of the NTC thermistor (2), water level electrode lead (4) and water level detection electrode (3) are fixed and positioned in the mounting cavity (11) by the insulating filler glue (10).