A waterproof and oil-proof air pressure sensor and electronic cigarette

Abstract

The present invention discloses a waterproof and oil-proof air pressure sensor and electronic cigarette, comprising: a circuit board with an air vent, an air pressure sensing element and a chip for processing air pressure data installed on the circuit board, and a shell installed on the circuit board to cover the air pressure sensing element and the chip, wherein the air vent is located below the air pressure sensing element; in particular, an air inlet is provided on the shell, and the positions of the air inlet and the air pressure sensing element are relatively staggered. The present invention relatively staggers the positions of the air pressure sensing element and the air inlet on the shell, thereby cleverly forming an L-shaped airway structure, improving the situation where external liquid erodes the air pressure sensing element. At the same time, the present invention has only one air inlet, and the aperture is small, which greatly reduces the probability of liquid and smoke oil intrusion.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic cigarettes, and in particular to a waterproof and oil-proof air pressure sensor and an electronic cigarette. Background Art

[0002] Electronic cigarettes usually atomize the liquid through an atomizer for users to use. When the liquid is made, tar and other harmful substances are removed to eliminate the harm to the human body. Existing electronic cigarette devices are composed of battery components, core control components, atomizer components and air pressure sensors that are fixedly connected in sequence. Due to the problems of the structural design itself, this type of electronic cigarette often has condensed liquid flowing back into the electronic cigarette air pressure sensor after the liquid is atomized, causing the electronic cigarette to fail to start, and then cause false triggering or non-triggering.

[0003] Therefore, how to design an electronic cigarette pressure sensor that is oil-proof and waterproof is a technical problem that the industry urgently needs to solve. Summary of the invention

[0004] In order to solve the technical problem that the air pressure sensor of the electronic cigarette in the prior art is not waterproof and oil-proof, the present invention provides a waterproof and oil-proof air pressure sensor and an electronic cigarette.

[0005] The technical solution adopted by the present invention is:

[0006] The present invention proposes a waterproof and oil-proof air pressure sensor and an electronic cigarette, comprising: a circuit board with an air vent, an air pressure sensing element and a chip for processing air pressure data installed on the front of the circuit board, and a shell with an air inlet, wherein the shell is installed on the front of the circuit board, the air pressure sensing element and the chip are located inside the shell, wherein the positions of the air inlet and the air pressure sensing element are relatively staggered, and the air vent is located below the air pressure sensing element.

[0007] In one embodiment, the air inlet hole is located above the chip.

[0008] In one embodiment, a dustproof net is installed on the air inlet.

[0009] In one embodiment, the air pressure sensing element is a MEMS silicon-based sensor.

[0010] In one embodiment, the chip is connected to the air pressure sensing element via a gold wire.

[0011] In one embodiment, the chip surface is sealed.

[0012] In one embodiment, a surface of the circuit board facing away from the housing is flat and is provided with a patch pad.

[0013] In one embodiment, the air pressure sensing element is fixed on the circuit board by silica gel, and the chip is fixed on the circuit board by resin glue.

[0014] In one embodiment, the shell is made of nickel-plated brass, and the shell is soldered to the circuit board using solder paste.

[0015] Furthermore, an electronic cigarette includes the above-mentioned waterproof and oil-proof air pressure sensor.

[0016] Compared with the prior art, the present invention relatively staggers the positions of the air pressure sensing element and the air inlet hole on the shell, thereby cleverly forming an L-shaped airway structure, improving the situation where external liquid erodes the air pressure sensing element. At the same time, the present invention has only one air inlet hole with a small aperture, which greatly reduces the probability of liquid and smoke oil intrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 Schematic diagram of the overall structure of a waterproof and oil-proof air pressure sensor in an embodiment of the present invention;

[0019] Figure 2 A top view of a waterproof and oil-proof air pressure sensor according to an embodiment of the present invention;

[0020] 1. Circuit board; 2. Air pressure sensing element; 3. Chip; 4. Shell; 5. Ventilation hole; 6. Air inlet hole; 7. Dust net. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1 As shown, the present invention proposes a waterproof and oil-proof air pressure sensor, comprising: a circuit board 1 with a vent 5, an air pressure sensing element 2 and a chip 3 for processing air pressure data mounted on the circuit board 1, a housing 4 mounted on the circuit board 1 and covering the air pressure sensing element 2 and the chip 3, the vent 5 being located below the air pressure sensing element 2, an air inlet 6 being provided on the housing 4, and the positions of the air inlet 6 and the air pressure sensing element 2 being relatively staggered.

[0024] like Figure 1-2 As shown, the circuit board 1 is designed to be circular (6mm*2.5mm), and a chip 3 for processing data and an air pressure sensing element 2 for sensing air pressure are attached to the front of the circuit board 1. The back of the circuit board 1 is flat, and a patch pad is left, which can realize surface SMT mounting, so that the present invention can be mounted on a total integrated PCB board, and integrated with other components on a PCB board to realize all the functions of the electronic cigarette. At the same time, there is also a vent 5 on the circuit board 1, which is located below the air pressure sensing element 2, and is used for the air pressure sensing element 2 to sense the external air pressure in real time. It also allows the liquid entering through the air inlet 6 to flow out through the vent 5.

[0025] In other embodiments, the circuit board can be variably designed according to the shape of the housing, and can also be made into a rectangle (3.7*2.9*1.1 mm). Therefore, the waterproof and oil-proof air pressure sensor proposed by the present invention has a more flexible and changeable packaging shape, which can adapt to different working scenarios.

[0026] like Figure 1 As shown, a housing 4 with an air inlet 6 is installed on the front of the circular circuit board 1. The housing 4 is a cylinder with an opening at the bottom end, a cavity in the middle, and a circular air inlet 6 on the upper bottom surface of the housing 4. The bottom end of the housing 4 is fitted with the front of the circuit board 1, and the chip 3 and the air pressure sensing element 2 installed on the circuit board 1 are located in the cavity. The air inlet 6 above the housing 4 is not directly facing the air pressure sensing element 2, but is relatively staggered with the position of the air pressure sensing element 2, forming an L-shaped airway structure. This structural design well avoids external liquid and smoke oil from directly dripping on the air pressure sensing element 2 through the air inlet 6 of the housing 4, thereby effectively improving the waterproof and oil-proof performance of the sensor. Furthermore, compared with the traditional air pressure sensing device, the number of air inlet holes 6 of the present invention is only one, and the aperture is small, which greatly reduces the probability of liquid and smoke oil intrusion. The housing 4 is made of nickel-plated brass, which can provide good physical protection and anti-electromagnetic interference, and is soldered on the circuit board using solder paste to ensure good air tightness. In addition, a dustproof net 7 is attached to the air inlet 6 to prevent particles from falling into the device through the air inlet and causing system malfunction.

[0027] In this embodiment, the chip 3 is fixed on the circuit board 1 using silicone and is located below the air inlet 6, and the air pressure sensing element 2 is fixed on the circuit board 1 using resin glue. The chip 3 realizes electrical signal bridging with the air pressure sensing element 2 through gold wires, provides a stable bias voltage for the air pressure sensing element 2, and processes the air pressure data collected from the air pressure sensing element 2. At the same time, the chip 3 is sealed by epoxy resin (black glue), and when liquid or smoke oil drips on it, it does not affect the normal use of the sensor, and the reliability is high.

[0028] In this embodiment, the air pressure sensing element 2 is a MEMS silicon-based sensor. It uses a silicon-based sensor chip generated by a micron-level CMOS chip process, with high consistency (high-precision manufacturing process plus a uniform and stable bias voltage), small size (0.95*0.95*0.5mm), and high temperature resistance. Compared with traditional PPS diaphragms, MEMS silicon-based sensors have the following significant advantages: ① Small temperature drift, insensitive to temperature changes, and relatively simple temperature compensation algorithm design; ② A bias voltage circuit is designed, which changes the sensing diaphragm from a non-charged state to a uniform charged state, thereby improving the consistency of the sensor; ③ The sensing diaphragm area is small, the sensing diaphragm diameter is 50um, while the traditional diaphragm diameter is 4.5mm. The smaller the diaphragm area, the smaller the deformation amount when vibrating, impacting, or falling, which is conducive to reducing the occurrence of undesirable phenomena such as false triggering.

[0029] The present invention also provides an electronic cigarette, comprising the waterproof and oil-proof air pressure sensor described above.

[0030] In other embodiments, the housing can also be directly mounted on the circuit board through SMT; the chip and the air pressure sensing element can be installed on the circuit board by welding; other air pressure sensors can also be used, such as capacitive pressure sensors, piezoresistive pressure sensors, etc., all of which are within the scope of protection of the present invention.

Claims

1. A waterproof and oil-proof air pressure sensor, comprising: A circuit board with a vent, an air pressure sensing element and a chip for processing air pressure data installed on the circuit board, and a shell covering the air pressure sensing element and the chip installed on the circuit board, wherein the vent is located below the air pressure sensing element, and is characterized in that an air inlet is provided on the shell, the positions of the air inlet and the air pressure sensing element are relatively staggered, the air pressure sensing element is arranged adjacent to the chip, the air inlet is located above the chip, the surface of the chip is sealed, the air pressure sensing element is a MEMS silicon-based sensor, and a dustproof net is installed on the air inlet.

2. A waterproof and oil-proof air pressure sensor as claimed in claim 1, characterized in that: The chip is connected to the air pressure sensing element through a gold wire.

3. A waterproof and oil-proof air pressure sensor as claimed in claim 1, characterized in that: The side of the circuit board facing away from the housing is flat and is provided with a patch pad.

4. A waterproof and oil-proof air pressure sensor as claimed in claim 1, characterized in that: The air pressure sensing element is fixed on the circuit board through silica gel, and the chip is fixed on the circuit board through resin glue.

5. A waterproof and oil-proof air pressure sensor as claimed in claim 1, characterized in that: The shell is made of nickel-plated brass, and is soldered on the circuit board using solder paste.

6. An electronic cigarette, characterized in that: A waterproof and oil-proof air pressure sensor comprising any one of claims 1-5.

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