A miniaturized integrated packaging detection device

Abstract

The utility model relates to the field of sensor technology, and discloses a miniaturized integrated package detection device, including a shell, an NTC thermistor and a capacitive water detection module, wherein the shell has a packaging cavity; the NTC thermistor and the capacitive water detection module are packaged and solidified in the packaging cavity by potting glue. The miniaturized integrated package detection device provided by the utility model packages and solidifies the NTC thermistor and the capacitive water detection module in the packaging cavity by potting glue, and concentrates them in the shell to form an integrated package detection device, with a miniaturized design and a small overall structure. The NTC thermistor is used to detect the temperature of the liquid, and the capacitive water detection module is used to detect whether there is liquid inside a container or a pipe or whether the liquid level has reached a corresponding height, so that the detection device has two functions of temperature detection and capacitive liquid level detection, and has strong practicality and high reliability, and is suitable for market promotion.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a miniaturized integrated packaging detection device. Background Art

[0002] A sensor is a front-end detection device that can sense the information of the object being measured and can convert the sensed information into telecommunication / current signals or other signal forms we need according to certain rules to output, which can meet the requirements of signal transmission, subsequent signal processing, display, recording, storage, or control. For example, at present, when measuring the temperature of the liquid in a container or pipeline and whether the liquid exists or the liquid point reaches a corresponding height, a temperature sensor and a liquid level sensor with a single structure are applied to the container or pipeline for detection. However, both a temperature sensor and a liquid level sensor are set in the container or pipeline. This design method easily leads to a large structure volume and occupies a large space, which is not conducive to the miniaturization design of the overall structure.

[0003] A Chinese patent with patent number CN206988049U discloses an automatic heating type air-free drainer for an air compressor system, comprising a drainer container, an air inlet for connecting to a drain outlet of an air compressor air tank is arranged on the upper half of the left side wall of the drainer container, a temperature sensor is arranged between the outer wall and the inner wall of the lower half of the left side wall of the drainer container; a drain outlet is arranged on the inner wall of the lower half of the right side wall of the drainer container, a drain pipe is connected to the rear end of the drain outlet, and an electric ball valve is installed on the drain pipe; a liquid level sensor mounting rod is suspended on the top inner wall of the drainer container, a high liquid level sensor is installed on the upper part of the liquid level sensor mounting rod, and a low liquid level sensor is installed on the bottom of the liquid level sensor mounting rod. However, the temperature sensor in the automatic heating type air-free drainer for the air compressor system is arranged between the outer wall and the inner wall of the lower half of the left side wall of the drainer container, and a liquid level sensor mounting rod needs to be installed. The high liquid level sensor and the low liquid level sensor are installed through the liquid level sensor mounting rod. Then, the positions of the temperature sensor and the liquid level sensor are separate, and screws or sensor mounting rods and other fixings may be required for positioning and installation of these two detection sensors in the drainer container. These two detection sensors not only need to occupy two spaces in the drainer container, but also the demand for fixings such as screws or sensor mounting rods is large, which also occupies the space of the drainer container. Therefore, using a single method to separately install the liquid level sensor and the temperature sensor in the drainer container takes up a lot of space and is not practical enough. Utility Model Content

[0004] The purpose of the utility model is to overcome the problems of the prior art and provide a miniaturized integrated packaging detection device with a miniaturized design and a small volume.

[0005] In order to achieve the above purpose, the utility model adopts the following scheme:

[0006] A miniaturized integrated packaged detection device comprises a shell, an NTC thermistor and a capacitive water detection module, wherein the shell has a packaging cavity; the NTC thermistor and the capacitive water detection module are packaged and solidified in the packaging cavity by potting glue.

[0007] Furthermore, the capacitive water detection module includes a sensing antenna, a water detection chip, a PCB board, a load capacitor and a correction capacitor; the water detection chip is electrically connected to the sensing antenna, the load capacitor and the correction capacitor respectively; the sensing antenna is attached to the PCB board; the water detection chip, the load capacitor and the correction capacitor are arranged on the PCB board.

[0008] Furthermore, the NTC thermistor is arranged on the PCB board.

[0009] Furthermore, one end of the NTC thermistor is located at the front end of the housing, and the other end is connected to the PCB board.

[0010] Furthermore, the shell has a positioning portion located in the packaging cavity; the positioning portion is provided with a positioning groove adapted to be engaged and positioned with one end of the PCB board.

[0011] Furthermore, the miniaturized integrated package detection device also includes a main control module; the main control module is electrically connected to the NTC thermistor and the water detection chip respectively.

[0012] Furthermore, the potting glue is epoxy resin potting glue, silicone resin potting glue or polyurethane potting glue.

[0013] Furthermore, the shell is a shell structure made of metal shell or ceramic or glass.

[0014] Compared with the existing technology, the utility model has the following advantages:

[0015] The utility model encapsulates and solidifies the NTC thermistor and the capacitive water detection module in the packaging cavity through potting glue, and concentrates them in the shell to form an integrated packaging detection device with miniaturized design and small overall structure volume. The NTC thermistor is used to detect the temperature of the liquid, and the capacitive water detection module is used to detect whether the liquid inside the container or the pipeline exists or the liquid level reaches the corresponding height, so that the miniaturized integrated packaging detection device has the two functions of temperature detection and capacitive liquid level detection, has strong practicability, high reliability, and is suitable for market promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the disassembled miniaturized integrated packaging detection device of the utility model after removing the potting glue.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the miniaturized integrated packaging detection device of the utility model.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the shell of the utility model.

[0020] Figure 4 It is a block diagram of electrical connections between structures of the miniaturized integrated packaging detection device of the utility model.

[0021] The figure includes:

[0022] Shell 1, packaging cavity 11, positioning part 12, positioning groove 13, NTC thermistor 2, capacitive water detection module 3, induction antenna 31, water detection chip 32, PCB board 33, load capacitor 34, correction capacitor 35, potting glue 4, main control module 5. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] like Figures 1 to 4 As shown, a miniaturized integrated package detection device is mainly used for liquid detection in containers or pipes, which includes a shell 1, an NTC thermistor 2 and a capacitive water detection module 3, wherein the shell 1 can be a metal shell, such as a stainless steel shell, which has good temperature conduction performance; of course, it can also be a shell structure made of non-metals such as ceramics or glass. The NTC thermistor 2 is used to detect the temperature of the liquid, and the capacitive water detection module 3 is used to detect whether the liquid inside the container or pipe exists or the liquid point reaches a corresponding height. The shell 1 has a packaging cavity 11; the NTC thermistor 2 and the capacitive water detection module 3 are packaged and cured in the packaging cavity 11 by a potting glue 4. The potting glue 4 is an epoxy resin potting glue 4 or a silicone resin potting glue 4 or a polyurethane potting glue 4.

[0025] The miniaturized integrated packaged detection device encapsulates and solidifies the NTC thermistor 2 and the capacitive water detection module 3 in the packaging cavity 11 through the potting glue 4, and concentrates them in the shell 1 to form an integrated packaged detection device with miniaturized design and small overall structure volume. The NTC thermistor 2 is used to detect the temperature of the liquid, and the capacitive water detection module 3 is used to detect whether there is liquid inside the container or pipeline or the liquid level reaches a corresponding height, so that the miniaturized integrated packaged detection device has two functions of temperature detection and capacitive liquid level detection, has strong practicality, high reliability, and is suitable for market promotion.

[0026] In this embodiment, the capacitive water detection module 3 includes a sensing antenna 31, a water detection chip 32, a PCB board 33, a load capacitor 34 and a correction capacitor 35; the water detection chip 32 is electrically connected to the sensing antenna 31, the load capacitor 34 and the correction capacitor 35 respectively. The water detection chip 32 is an existing sensor chip for detecting liquid. The sensing antenna 31 is attached to the PCB board 33; the sensing antenna 31 is a copper foil attached to the PCB board 33; as a conductive liquid material, the copper foil is generally designed to have a certain sensing area, and the area is preferably rectangular, so as to have a larger sensing area, and the parasitic capacitance is as small as possible, controlled within 10PF, and the sensing area of ​​the copper foil is designed to be between 5*5mm and 25*25mm as much as possible, ensuring a larger sensing area, so as to ensure high sensitivity and high accuracy. The sensing antenna 31 collects the change in capacitance caused by the change in the liquid point inside the container or pipeline, and is mainly used to monitor whether the liquid exists or whether the liquid point reaches the set height. Specifically, the CP port of the water detection chip 32 is connected to the correction capacitor 35, and the correction capacitor 35 is the set difference between the presence of liquid and the absence of liquid. The TK port of the water detection chip 32 is connected to the induction antenna 31, and the load capacitor 34 is used for collection. After the water detection chip 32 is powered on, it automatically collects and compares the data collected by its CP port and the TK port, and judges the difference between the data collected by its TK port and the CP port to determine whether the liquid exists or the liquid reaches the corresponding height. The water detection chip 32 outputs a high and low level at its corresponding output terminal. If the data of the TK port is less than the data of the CP port, the corresponding output terminal of the water detection chip 32 outputs a high level, and it is determined that there is no liquid or the liquid level is lower than the set height. On the contrary, there is liquid or the liquid level is higher than the set height. The purpose of this design is to realize that the capacitive water detection module 3 can be used to detect the change or height of the liquid level inside the container or pipeline, and has a good detection effect.

[0027] In order to miniaturize the structure, reduce the overall volume of the structure, and facilitate installation, the water detection chip 32, the load capacitor 34, and the correction capacitor 35 are arranged on the PCB board 33. The NTC thermistor 2 is arranged on the PCB board 33. The sensing antenna 31, the water detection chip 32, the PCB board 33, the load capacitor 34, and the correction capacitor 35 are centrally arranged on the PCB board 33 to avoid occupying too much internal space of the housing 1, so that the structure can be miniaturized, the overall volume of the structure is small, and compared with the installation of each part, this arrangement is more convenient to install.

[0028] In this embodiment, one end of the NTC thermistor 2 is located at the front end of the housing 1, and the other end is connected to the PCB board 33. The purpose of this design is to facilitate the NTC thermistor 2 to stably detect the temperature of the liquid.

[0029] In order to enhance the structural stability and ensure a stable and reliable connection, the housing 1 has a positioning portion 12 located in the packaging cavity 11; the positioning portion 12 is provided with a positioning groove 13 adapted to be inserted and positioned with one end of the PCB board 33. First, one end of the PCB board 33 is inserted and positioned in the positioning groove 13, so that the structure is stable. Then, the NTC thermistor 2 and the capacitive water detection module 3 are encapsulated and cured by the potting glue 4. In this way, the structural connection is more stable and reliable.

[0030] In this embodiment, the miniaturized integrated package detection device further includes a main control module 5; the main control module 5 is electrically connected to the NTC thermistor 2 and the water detection chip 32 respectively. Data collection is performed through the main control module 5 so that the user can understand the liquid temperature and liquid level in the container and the pipeline. At the same time, the main control module 5 and the water detection chip 32 can send and receive data signals to each other, and the main control module 5 can remotely control the water detection chip 32 so as to adjust the sensitivity of the water detection chip 32 and the accuracy of the data, such as adjusting the correction capacitor 35 to the set difference between the presence of liquid and the absence of liquid.

[0031] It should be noted that the NTC thermistor 2, the main control module 5, and the water detection chip 32 are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods. The specific implementation of the present utility model may involve the use of software, but the software used is the most commonly used software by technical personnel in this field, and is not within the scope of protection of the claims of this patent application.

[0032] In summary, the embodiment of the utility model provides a miniaturized integrated packaged detection device, wherein the miniaturized integrated packaged detection device encapsulates and solidifies the NTC thermistor 2 and the capacitive water detection module 3 in the packaging cavity 11 through the potting glue 4, and concentrates them in the outer shell 1 to form an integrated packaged detection device with a miniaturized design and a small overall structure. The NTC thermistor 2 is used to detect the temperature of the liquid, and the capacitive water detection module 3 is used to detect whether there is liquid inside the container or pipe or whether the liquid level reaches the corresponding height, so that the miniaturized integrated packaged detection device has two functions of temperature detection and capacitive liquid level detection, has strong practicality and high reliability, and is suitable for market promotion.

[0033] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A miniaturized integrated packaging detection device, comprising a housing, characterized in that: It also includes an NTC thermistor and a capacitive water detection module. The shell has a packaging cavity. The NTC thermistor and the capacitive water detection module are packaged and solidified in the packaging cavity through potting glue.

2. A miniaturized integrated packaging detection device according to claim 1, characterized in that: The capacitive water detection module includes an induction antenna, a water detection chip, a PCB board, a load capacitor and a correction capacitor; the water detection chip is electrically connected to the induction antenna, the load capacitor and the correction capacitor respectively; the induction antenna is attached to the PCB board; the water detection chip, the load capacitor and the correction capacitor are arranged on the PCB board.

3. A miniaturized integrated packaging detection device according to claim 2, characterized in that: The NTC thermistor is arranged on the PCB board.

4. A miniaturized integrated packaging detection device according to claim 2 or 3, characterized in that: One end of the NTC thermistor is located at the front end of the housing, and the other end is connected to the PCB board.

5. A miniaturized integrated packaging detection device according to claim 2 or 3, characterized in that: The shell is provided with a positioning part located in the packaging cavity; the positioning part is provided with a positioning groove adapted to be embedded and positioned with one end of the PCB board.

6. The miniaturized integrated packaging detection device according to claim 2, characterized in that: It also includes a main control module; the main control module is electrically connected to the NTC thermistor and the water detection chip respectively.

7. The miniaturized integrated packaging detection device according to claim 1, characterized in that: The potting glue is epoxy resin potting glue, silicone resin potting glue or polyurethane potting glue.

8. The miniaturized integrated packaging detection device according to claim 1, characterized in that: The shell is a shell structure made of metal shell or ceramic or glass.

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