Electronic air filter blocking alarm sensor

Abstract

The utility model is suitable for the technical field of air filter blocking alarm sensors, and provides an electronic air filter blocking alarm sensor, which comprises a stainless steel shell, one side of the stainless steel shell is plugged with a plugging assembly, and the stainless steel shell and the plugging assembly are internally provided with internal assemblies; wherein the stainless steel shell is of a hollow structure; the plug-in assembly comprises a plastic connector, a plug-in groove is formed in the top of the plastic connector, a first air hole is formed in one side of the inner wall of the plastic connector in a penetrating mode, and a second air hole is formed in the side, away from the first air hole, of the plug-in groove. The internal assembly includes a plurality of sets of pins. The device solves the problems that a traditional air filter blockage alarm sensor can only generate an alarm signal when blockage is serious, cannot measure the blockage degree of an air filter in real time and cannot realize an early warning function, and achieves the effects of giving an alarm in real time, early warning in advance, improving the detection sensitivity, avoiding error and false alarm, and improving the detection accuracy. And the service life of the sensor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air filter clogging alarm sensors, and more specifically, to an electronic air filter clogging alarm sensor. Background Art

[0002] Non-road mobile machinery, especially agricultural machinery and construction machinery, operates in a harsh environment, and the air in the operation area contains a lot of dust and fine sand particles. The air filter is very easy to clog. At this time, the engine will have symptoms such as difficult starting, lack of power, and unstable idling. In severe cases, it may even cause serious consequences such as engine cylinder pulling. To avoid this phenomenon, it is necessary to install an air filter clogging alarm sensor to remind the driver to replace the filter element in time.

[0003] At present, the air filter clogging alarm sensors used on fuel engines are usually of mechanical structure. When the air filter is severely clogged, the diaphragm and spring are deformed by the atmospheric pressure difference, so that the conductive sheet is turned on or off, thereby generating an alarm signal and transmitting it to the ECU. Since the negative pressure generated by the air filter clogging belongs to micro-pressure measurement, it is very difficult for traditional mechanical air filter clogging alarm sensors to meet the requirements in terms of accuracy. The diaphragm and spring force used in the design are very small. Due to the harsh working environment of non-road mobile machinery, especially agricultural machinery and construction machinery, the traditional mechanical air filter clogging alarm sensor may fail, resulting in false alarms or missed alarms. Although non-road mobile machinery, especially agricultural machinery and construction machinery, is more in need of air filter clogging alarm sensors to remind users to replace the air filter in time, the traditional mechanical air filter clogging alarm sensor cannot be used normally and durably under this working condition due to structural defects. Secondly, the traditional air filter clogging alarm sensor can only generate an alarm signal when the clogging is severe, and cannot measure the clogging degree of the air filter in real time, so it cannot realize the early warning function and cannot fully meet the requirements of current fuel engines and vehicle intelligence.

[0004] Therefore, an electronic air filter clogging alarm sensor is proposed, which can reliably and accurately measure the pressure difference between the inside and the outside environment of the engine intake pipe, give a real-time alarm for air filter clogging, and can also give an early warning. Improve the detection sensitivity, avoid error false alarms, and improve the measurement accuracy and service life of the sensor. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide an electronic air filter clogging alarm sensor that improves the detection sensitivity, avoids error false alarms, and improves the measurement accuracy and service life of the sensor.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] Electronic air filter clogging alarm sensor, including a stainless steel housing, one side of the stainless steel housing is encapsulated with a plug-in component, and an internal component is arranged inside the stainless steel housing and the plug-in component; wherein, the stainless steel housing is arranged as a hollow structure; the plug-in component includes a plastic connector, a plug-in groove is opened at the top of the plastic connector, a first air hole is penetrated through one side of the inner wall of the plastic connector, and a second air hole is opened on one side of the plug-in groove away from the first air hole; the internal component includes a plurality of pins, one end of the plurality of pins is connected with a flexible PCB, a first waterproof and breathable membrane is arranged on the side of the flexible PCB away from the pins, and the bottom end of the first waterproof and breathable membrane is connected with a PCB main board.

[0008] The present utility model is further arranged as: the plug-in groove is adapted to the shape of the plastic connector, and the second air hole communicates the plug-in groove with the internal space of the stainless steel housing.

[0009] By adopting the above technical solution, when an external wire harness connector is inserted, due to the rubber ring in the wire harness connector, a piston effect will be formed, and the internal pressure will suddenly increase, causing measurement errors or damage to the sensor, and then false alarms will occur. When the wire harness connector is inserted, the air is smoothly discharged through the first air hole to ensure that the pressure in the internal cavity of the plug-in component remains unchanged, thereby successfully avoiding measurement errors, damage to the sensor and false alarms. When the wire harness connector is completely inserted, the self-bringing sealing ring on the wire harness connector just blocks the first air hole on the plastic connector, preventing subsequent stray liquid or gas from infiltrating through the first air hole on the plastic connector, improving the sensing sensitivity of the sensor, and improving the measurement accuracy and service life of the sensor. The function of the second air hole is to conduct the plug-in component and the internal part of the stainless steel housing, so that the inside of the device is not directly in contact with the external environment. Through this design, it can effectively isolate the infiltration of dust, liquid, etc. in the harsh working environment of non-road mobile machinery, especially agricultural machinery and construction machinery, and effectively protect the sensor.

[0010] The present utility model is further arranged as: the pins are arranged as cylindrical structures, and multiple groups of the pins are inserted inside the plastic connector.

[0011] The present utility model is further arranged as: one end of the pin is connected with a flexible PCB, the PCB main board is arranged as a cylindrical structure, and the diameter of the PCB main board is the same as the inner wall diameter of the stainless steel housing.

[0012] The present utility model is further arranged as: an O-ring is arranged at the bottom end of the PCB main board, the O-ring is arranged as an annular structure, and a micro differential pressure chip is arranged at the center of the bottom end of the PCB main board.

[0013] By adopting the above technical solution, for the first air hole formed in the plastic connector, when the external wire harness connector is inserted, due to the rubber ring in the wire harness connector, a piston effect will be formed, resulting in a sudden increase in the pressure above the micro differential pressure chip, which may cause measurement errors or even damage to the sensor and generate false alarms. The function of designing the first air hole is to smoothly discharge air through the first air hole when the wire harness connector is inserted, ensuring that the pressure in the internal cavity of the plug-in assembly and the pressure above the micro differential pressure chip remain unchanged, thereby successfully avoiding measurement errors, damage to the sensor, and generation of false alarms. When the wire harness connector is fully inserted, the self-adhesive sealing ring on the wire harness connector exactly blocks the first air hole on the plastic connector, preventing subsequent stray liquid or gas from infiltrating through the first air hole on the plastic connector, improving the sensing sensitivity of the sensor, and enhancing the measurement accuracy and service life of the sensor. The function of the second air hole is to conduct the plug-in assembly and the inside of the stainless steel housing. Not only can the micro differential pressure chip obtain a necessary cavity with the same pressure as the atmospheric pressure, but more importantly, due to the relative enclosure of the wire harness, the gas is conducted inside the wire harness closed sleeve and does not directly contact the external environment. Through this design, it can effectively isolate the infiltration of dust, liquid, etc. in the harsh operating environment of non-road mobile machinery, especially agricultural machinery and construction machinery, into the above-mentioned cavity, and effectively protect the micro differential pressure chip.

[0014] The present utility model is further configured as: a second waterproof and breathable membrane is connected to the bottom end of the micro differential pressure chip, and the first waterproof and breathable membrane and the second waterproof and breathable membrane are adapted to the shape of the micro differential pressure chip.

[0015] By adopting the above technical solution, the first waterproof and breathable membrane is pasted on the back of the PCB main board, enabling the gas to be conducted between the back of the micro differential pressure chip and the external cavity, maintaining the same pressure, while also isolating liquid and other impurities, thereby protecting the micro differential pressure chip from corrosion, improving the measurement accuracy, and extending the service life. The second waterproof and breathable membrane is pasted on the front of the micro differential pressure chip, enabling the second waterproof and breathable membrane on the front of the micro differential pressure chip to not only conduct gas between the front of the chip and the external space, maintaining the same pressure, but also effectively isolate liquid and other impurities, thereby protecting the chip from corrosion, improving the measurement accuracy, and extending the service life.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The first air hole opened on the plastic connector plug. When the external wire harness connector is inserted, due to the rubber ring on the wire harness connector, a piston effect will be formed, resulting in a sudden increase in the pressure above the differential pressure chip, which may cause measurement errors or damage to the sensor and generate false alarms. The function of designing the first air hole is to smoothly discharge air through the first air hole when the wire harness connector is inserted, ensuring that the pressure in the internal cavity of the plug-in assembly and the pressure above the differential pressure chip remain unchanged, thereby successfully avoiding measurement errors, damage to the sensor, and false alarms. When the wire harness connector is fully inserted, the self - contained sealing ring on the wire harness connector just blocks the first air hole on the plastic connector, preventing subsequent stray liquids or gases from infiltrating through the first air hole on the plastic connector, improving the sensing sensitivity of the sensor, and enhancing the measurement accuracy and service life of the sensor.

[0018] 2. The function of the second air hole is to conduct the internal cavities of the plug - in assembly and the stainless - steel housing. It not only provides a necessary cavity with the same pressure as the atmospheric pressure on the back of the differential pressure chip, but more importantly, due to the relative enclosure of the wire harness, the gas is conducted inside the wire harness closed sleeve and does not directly contact the external environment. Through this design, it can effectively isolate the infiltration of dust, liquids, etc. in the harsh operating environments of non - road mobile machinery, especially agricultural machinery and construction machinery, into the above - mentioned cavity, effectively protecting the differential pressure chip.

[0019] 3. The first waterproof breathable membrane is pasted on the back of the PCB main board, enabling the gas conduction between the back of the differential pressure chip and the external cavity, maintaining the same pressure, while isolating liquids and other impurities at the same time, thereby protecting the differential pressure chip from corrosion, improving the measurement accuracy, and extending the service life. The second waterproof breathable membrane is pasted on the front of the differential pressure chip, enabling the gas conduction between the second waterproof breathable membrane on the front of the differential pressure chip and the external space, maintaining the same pressure, while effectively isolating liquids and other impurities at the same time, thereby protecting the chip from corrosion, improving the measurement accuracy, and extending the service life. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the electronic air filter clogging alarm sensor of the present utility model.

[0021] Figure 2 It is a schematic internal structural diagram of the present utility model.

[0022] Figure 3 It is a schematic diagram of some internal mechanisms of the present utility model.

[0023] Description of the reference numerals in the drawings: 1. Stainless - steel housing;

[0024] 2. Plug - in assembly; 21. Plastic connector plug; 22. First air hole; 23. Second air hole; 24. Plug - in slot;

[0025] 3. Internal components; 31. Pin; 32. Flexible PCB; 33. PCB main board; 34. O-ring; 35. Micro differential pressure chip; 36. First waterproof and breathable membrane; 37. Second waterproof and breathable membrane. Detailed implementation mode

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0027] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0028] Embodiment 1, please refer to Figures 1-3 , the present utility model provides the following technical solutions:

[0029] Specifically, it refers to an electronic air filter clogging alarm sensor. Refer to Figures 1-3 , including a stainless steel housing 1, which provides an installation environment for the plug-in component 2 and part of the internal components 3. The stainless steel housing 1 is installed on the air filter. One side of the stainless steel housing 1 is plugged with the plug-in component 2, which provides an installation environment for part of the internal components 3. At the same time, the plug-in component 2 can avoid sensor measurement errors, damage and false alarms. Inside the stainless steel housing 1 and the plug-in component 2, there are internal components 3. Through the internal components 3, liquids and other impurities can be effectively isolated, thereby protecting the chip from corrosion, improving the measurement accuracy and extending the service life. Among them, the stainless steel housing 1 is set as a hollow structure.

[0030] Refer to Figure 2 , the plug-in component 2 includes a plastic connector 21. A plug-in slot 24 is opened at the top of the plastic connector 21. One side of the inner wall of the plastic connector 21 is penetrated with a first air hole 22. A second air hole 23 is opened on the side of the plug-in slot 24 away from the first air hole 22; the plug-in slot 24 is adapted to the shape of the plastic connector 21, and the second air hole 23 communicates with the inside of the stainless steel housing 1.

[0031] Specifically, when the external wire harness connector is inserted, due to the rubber ring in the wire harness connector, a piston effect will be formed, and the internal pressure will suddenly increase, which may cause measurement errors or even damage to the sensor and result in false alarms. When the wire harness connector is inserted, the air is smoothly discharged through the first air hole 22 to ensure that the pressure in the internal cavity of the plug-in component 2 remains unchanged, thus successfully avoiding measurement errors, damage to the sensor, and false alarms. When the wire harness connector is fully inserted, the self - contained sealing ring on the wire harness connector just blocks the first air hole 22 on the plastic connector, preventing subsequent stray liquid or gas from infiltrating through the air hole into the stainless - steel housing 1, improving the induction sensitivity of the sensor, the measurement accuracy of the sensor, and its service life. The function of the second air hole 23 is to conduct the inside of the plug-in component 2 and the stainless - steel housing 1, so that the inside of the device is not directly in contact with the external environment. Through this design, it can effectively isolate the infiltration of dust, liquid, etc. in the harsh operating environment of non - road mobile machinery, especially agricultural machinery and construction machinery, and effectively protect the sensor.

[0032] Refer to Figures 2-3 , the internal component 3 includes multiple groups of pins 31. One end of the multiple groups of pins 31 is connected to a flexible PCB 32. A first waterproof and breathable membrane 36 is arranged on the side of the flexible PCB 32 away from the pins 31. The bottom end of the first waterproof and breathable membrane 36 is connected to a PCB main board 33; the pins 31 are set as a cylindrical structure, and the multiple groups of pins 31 are inserted into the inside of the plastic connector 21. One end of the pins 31 is connected to a flexible PCB 32. The PCB main board 33 is set as a cylindrical structure, and the diameter of the PCB main board 33 is the same as the inner wall diameter of the stainless - steel housing 1. An O - ring 34 is arranged at the bottom end of the PCB main board 33. The O - ring 34 is set as an annular structure. A differential pressure chip 35 is arranged at the center of the bottom end of the PCB main board 33. The bottom end of the differential pressure chip 35 is connected to a second waterproof and breathable membrane 37. The first waterproof and breathable membrane 36 and the second waterproof and breathable membrane 37 are adapted to the shape of the differential pressure chip 35.

[0033] Specifically, through the first air hole 22 formed in the plastic connector 21, when an external wire harness connector is inserted, due to the rubber ring in the wire harness connector, a piston effect will be formed, resulting in a sudden increase in the pressure above the differential pressure chip 35, which may cause measurement errors or even damage to the sensor and generate false alarms. The function of designing the first air hole 22 is to smoothly discharge air through the first air hole 22 when the wire harness connector is inserted, ensuring that the pressure in the internal cavity of the plug-in assembly 2 and the pressure above the differential pressure chip 35 remain unchanged, thus successfully avoiding measurement errors, damage to the sensor, and generation of false alarms. When the wire harness connector is fully inserted, the self - contained sealing ring on the wire harness connector exactly blocks the air hole stainless steel housing 1, preventing subsequent stray liquids or gases from infiltrating through the first air hole 22 on the plastic connector, improving the sensing sensitivity of the sensor, and enhancing the measurement accuracy and service life of the sensor. The function of the second air hole 23 is to conduct between the plug-in assembly 2 and the inside of the stainless steel housing 1. Not only does it enable the differential pressure chip 35 to obtain a necessary cavity with the same pressure as the atmospheric pressure, but more importantly, due to the relative enclosure of the wire harness, the gas is conducted inside the wire harness closed sleeve and does not directly contact the external environment. Through this design, it can effectively isolate the infiltration of dust, liquids, etc. in the harsh operating environments of non - road mobile machinery, especially agricultural machinery and construction machinery, into the above - mentioned cavity, effectively protecting the differential pressure chip 35. The first waterproof breathable membrane 36 is pasted on the back of the PCB main board 33, enabling not only gas conduction between the back of the differential pressure chip 35 and the external cavity to maintain the same pressure, but also isolation of liquids and other impurities, thereby protecting the differential pressure chip 35 from corrosion, improving the measurement accuracy, and extending the service life. The second waterproof breathable membrane 37 is pasted on the front of the differential pressure chip 35, enabling not only gas conduction between the second waterproof breathable membrane 37 on the front of the differential pressure chip 35 and the external space to maintain the same pressure, but also effective isolation of liquids and other impurities, thereby protecting the chip from corrosion, improving the measurement accuracy, and extending the service life.

[0034] Obviously, the above - described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

Claims

1. Electronic air filter clogging alarm sensor, characterized in that: It includes a stainless-steel housing (1), on one side of which is plugged in a plug-in component (2), and an internal component (3) is arranged inside the stainless-steel housing (1) and the plug-in component (2). Among them, the stainless-steel housing (1) is arranged as a hollow structure. The plug-in component (2) includes a plastic connector (21), on the top of which is opened a plug-in slot (24), on one side of the inner wall of the plastic connector (21) is penetrated and opened a first air hole (22), and on one side of the plug-in slot (24) away from the first air hole (22) is opened a second air hole (23). The internal component (3) includes multiple groups of pins (31), one end of each group of pins (31) is connected to a flexible PCB (32), on the side of the flexible PCB (32) away from the pins (31) is arranged a first waterproof and breathable membrane (36), and at the bottom end of the first waterproof and breathable membrane (36) is connected a PCB main board (33).

2. The electronic air filter clogging alarm sensor according to claim 1, wherein: On one side of the inner wall of the plastic connector (21) is penetrated and opened a first air hole (22).

3. The electronic air filter clogging alarm sensor according to claim 1, characterized in that: The plug-in slot (24) is adapted to the shape of the plastic connector (21), and the second air hole (23) communicates the plug-in slot (24) with the inside of the stainless-steel housing (1).

4. The electronic air filter clogging alarm sensor according to claim 2, wherein: The pins (31) are arranged as cylindrical structures, and multiple groups of pins (31) are plugged inside the plastic connector (21).

5. The electronic air filter clogging alarm sensor according to claim 3, characterized in that: One end of the pins (31) is connected to a flexible PCB (32), the PCB main board (33) is arranged as a cylindrical structure, and the diameter of the PCB main board (33) is the same as the inner diameter of the stainless-steel housing (1).

6. The electronic air filter clogging alarm sensor according to claim 4, wherein: At the bottom end of the PCB main board (33) is arranged an O-ring (34), the O-ring (34) is arranged as an annular structure, and at the center of the bottom end of the PCB main board (33) is arranged a differential pressure chip (35).

7. The electronic air filter clogging alarm sensor according to claim 6, characterized in that: At the bottom end of the differential pressure chip (35) is connected a second waterproof and breathable membrane (37), and the first waterproof and breathable membrane (36) and the second waterproof and breathable membrane (37) are adapted to the shape of the differential pressure chip (35).

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