CN219330740U

CN219330740U - PCBA control module and electronic atomizer

Info

Publication number: CN219330740U
Application number: CN202223372703.6U
Authority: CN
Inventors: 陈小康; 李健正
Original assignee: Shenzhen Xinyibang Electronic Co ltd
Current assignee: Shenzhen Xinyibang Electronic Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-07-14
Anticipated expiration: 2032-12-14

Abstract

The utility model discloses a PCBA control module and an electronic atomizer, wherein the PCBA control module comprises a PCB, a charging interface, an MEMS airflow sensor and two oil-proof ventilation pieces, and a through hole is formed in the front surface of the PCB in a penetrating way; the charging interface is arranged on the front surface of the PCB and is electrically connected with the PCB; the MEMS airflow sensor is arranged on the front surface of the PCB and is electrically connected with the PCB, a first air hole and a second air hole are formed on the outer surface of the MEMS airflow sensor, the first air hole, the second air hole and the through hole are sequentially communicated and are provided with air passages, and the MEMS airflow sensor is used for responding to external air pressure changes to generate capacitance changes; the two oil-proof ventilation pieces are respectively arranged at the two ends of the air passage to prevent tobacco tar from entering the air passage. The technical scheme of the utility model aims to reduce the probability of false triggering of the PCBA control module of the electronic atomizer.

Description

PCBA control module and electronic atomizer

Technical Field

The utility model relates to the technical field of MEMS sensors, in particular to a PCBA control module and an electronic atomizer.

Background

The electronic atomizer is an electronic product imitating cigarettes, and the MEMS airflow sensor is an important component which is arranged in a PCBA control module of the electronic atomizer and is used for controlling the electronic atomizer to work. The working principle is that in the process of smoking action of a user, the vibrating diaphragm is deformed by changing air flow, so that the capacitance value is changed, the IC chip detects the change of the capacitance value, the control circuit of the electronic atomizer is triggered to start working, then the heating wire heats, smoking oil is atomized to form smoke, and finally the smoking action is completed.

At present, in the use process of the MEMS airflow sensor, tobacco tar easily enters the MEMS airflow sensor through the air holes, is adsorbed on the surface, the inside and the whole input loop of the MEMS chip, so that the input impedance of the MEMS airflow sensor can be reduced, and after the tobacco tar on the MEMS chip is accumulated to a certain degree, the internal logic control circuit of the electronic atomizer control IC can be reversely started to generate the phenomenon of false triggering.

Disclosure of Invention

The utility model mainly aims to provide a PCBA control module, which aims to reduce the probability of false triggering of the PCBA control module of an electronic atomizer.

In order to achieve the above object, the present utility model provides a PCBA control module, comprising:

the front surface of the PCB is provided with a through hole in a penetrating way;

the charging interface is arranged on the front surface of the PCB and is electrically connected with the PCB;

the MEMS airflow sensor is arranged on the front surface of the PCB and is electrically connected with the PCB, a first air hole and a second air hole are formed on the outer surface of the MEMS airflow sensor, the first air hole, the second air hole and the through hole are sequentially communicated and form an air passage, and the MEMS airflow sensor is used for responding to external air pressure changes to generate capacitance changes; and

the two oil-proof ventilation pieces are respectively arranged at the two ends of the air passage so as to prevent tobacco tar from entering the air passage.

In one embodiment of the utility model, the MEMS airflow sensor includes:

the substrate is arranged on the front surface of the PCB and is laminated above the through hole, the substrate is electrically connected with the PCB, and the second air hole is formed in the substrate;

the first cover shell is covered on the base plate and forms a mounting cavity with the base plate, the surface of the first cover shell is provided with the first air holes communicated with the mounting cavity, and the oil-proof air-permeable piece is attached to the outer surface of the first cover shell so as to cover the first air holes; and

and the MEMS chip is arranged on the substrate and positioned in the mounting cavity, and is electrically connected with the substrate.

In one embodiment of the utility model, the first housing comprises:

the top plate is arranged opposite to the base plate, the first air holes are formed in the side, facing the base plate, of the top plate in a penetrating mode, and the oil-proof air permeable piece is attached to the side, facing away from the base plate, of the top plate; and

the side plate is positioned between the top plate and the base plate, the top of the side plate is connected with the top plate, the bottom of the side plate is connected with the base plate, and the side plate, the top plate and the base plate are enclosed to form the mounting cavity.

In an embodiment of the utility model, the MEMS airflow sensor further includes a detection IC, where the detection IC is disposed on the substrate and is located in the mounting cavity, and the detection IC is electrically connected to the substrate.

In an embodiment of the utility model, the PCBA control module further includes a second housing, and the second housing covers the back surface of the PCB board and encloses with the PCB board to form an air cavity.

In an embodiment of the present utility model, the through hole is located at a bottom wall of the air cavity, a third air hole communicating with the air cavity is provided on a surface of the second housing, the first air hole, the second air hole, the through hole, the air cavity, and the third air hole are sequentially communicated to form the air channel, and the oil-proof air-permeable member is attached to an outer surface of the second housing to cover one end of the air channel.

In one embodiment of the utility model, the second housing comprises:

the cover plate is arranged opposite to the PCB, the third air holes are formed in the cover plate in a penetrating mode towards one side of the PCB, and the oil-proof air-permeable piece is attached to one side, away from the PCB, of the cover plate; and

the bounding wall, the bounding wall is located the apron with between the PCB board, the top of bounding wall with the apron is connected, the bottom of bounding wall with the PCB board is connected, the bounding wall with the apron the PCB board encloses and is formed with the air cavity.

In an embodiment of the utility model, the PCBA control module further includes a control IC, where the control IC is disposed on the PCB and electrically connected to the PCB, and is configured to obtain a capacitance change of the MEMS airflow sensor.

In one embodiment of the utility model, the oil-resistant breathable member is an oil-resistant mesh.

The utility model also provides an electronic atomizer, which comprises a PCBA control module, wherein the PCBA control module comprises:

The PCBA control module comprises a PCB, a charging interface, an MEMS airflow sensor and an oil-proof ventilation piece, wherein the MEMS airflow sensor is arranged on the front surface of the PCB in a bonding mode, a first air hole and a second air hole are formed in the outer surface of the MEMS airflow sensor, a through hole is formed in the front surface of the PCB, the first air hole, the second air hole and the through hole are communicated to form an air passage, an MEMS chip of the MEMS airflow sensor is positioned in the air passage, when a user has smoking or blowing actions, air flows into the air passage, pressure difference exists between the air pressure in the air passage and the air pressure of the external environment, a capacitor structure of the MEMS chip can be deformed, the capacitance value can be changed, and the PCB can control the working state of the electronic atomizer after receiving signals of the capacitance value change of the MEMS chip. In order to prevent tobacco tar from entering the air passage from two ends of the air passage and being adsorbed on the MEMS chip, oil-proof ventilation pieces are arranged at two ends of the air passage, so that when gas exchange can be formed between the air passage and the outside, the tobacco tar cannot enter the air passage from the outside and be adsorbed on the surface, the inside and the input loop of the MEMS chip, and therefore, the tobacco tar can be effectively prevented from accumulating inside the MEMS airflow sensor, and the false triggering probability of the electronic atomizer is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a PCBA control module according to an embodiment of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is another view of fig. 2.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	PCBA control module	322	Side plate
10	PCB (printed circuit board)	323	Mounting cavity
				11	Through hole	33	MEMS chip
20	Charging interface	40	Oil-proof ventilation piece
				30	MEMS airflow sensor	50	Second housing
31	Substrate board	51	Cover plate
				311	Second air hole	511	Third air hole
32	First housing	52	Coaming plate
				321	Top plate	53	Air cavity
3211	First air hole

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 to 3, the present utility model provides a PCBA control module 100, comprising:

the PCB 10, the front of the PCB 10 is provided with a through hole 11;

the charging interface 20 is arranged on the front surface of the PCB 10 and is electrically connected with the PCB 10;

the MEMS airflow sensor 30 is disposed on the front surface of the PCB 10 and is electrically connected to the PCB 10, a first air hole 3211 and a second air hole 311 are formed on the outer surface of the MEMS airflow sensor 30, the first air hole 3211, the second air hole 311 and the through hole 11 are sequentially communicated and form an air passage (not labeled), and the MEMS airflow sensor 30 is configured to generate a capacitance change in response to an external air pressure change; and

the two oil-proof ventilation pieces 40 are respectively arranged at the two ends of the air passage so as to prevent tobacco tar from entering the air passage.

The PCBA control module 100 comprises a PCB 10, a charging interface 20, a MEMS airflow sensor 30 and an oil-proof ventilation member 40, wherein the MEMS airflow sensor 30 is arranged on the front surface of the PCB 10 in a bonding manner, a first air hole 3211 and a second air hole 311 are formed on the outer surface of the MEMS airflow sensor 30, a through hole 11 is formed on the front surface of the PCB 10, the first air hole 3211, the second air hole 311 and the through hole 11 are communicated to form an air passage, a MEMS chip 33 of the MEMS airflow sensor 30 is positioned in the air passage, when a user performs smoking or blowing actions, air flows into the air passage, pressure difference exists between air pressure in the air passage and air pressure of the external environment, a capacitor structure of the MEMS chip 33 is deformed, accordingly, a capacitance value is changed, and after the PCB 10 receives a signal of the capacitance value change of the MEMS chip 33, the working state of the electronic atomizer is controlled. In order to prevent tobacco tar from entering the air passage from two ends of the air passage and being adsorbed on the MEMS chip 33, oil-proof ventilation pieces 40 are arranged at two ends of the air passage, so that when gas exchange can be formed between the air passage and the outside, the tobacco tar cannot enter the air passage from the outside and be adsorbed on the surface, the inside and the input loop of the MEMS chip 33, and therefore, the tobacco tar can be effectively prevented from accumulating inside the MEMS airflow sensor, and the false triggering probability of the electronic atomizer is reduced.

The charging interface 20 may be one of a Type-C interface, a lighting interface, a Micro USB interface, a USB interface, or other charging interface 20, and the kind of the charging interface 20 is not limited herein. The MEMS airflow sensor 30 is fixed on the front surface of the PCB 10 by means of soldering and is electrically connected to the PCB 10. The oil-repellent breathable member 40 may be an oil-repellent net, an oil-repellent breathable film, or an oil-repellent net, and the kind and structure of the oil-repellent breathable member 40 are not limited. After the arrangement is completed, the gas can pass through the oil-proof ventilation piece 40, but oily matters such as tobacco tar and the like can not pass through the oil-proof ventilation piece 40, so that the effect of filtering oily matters in the gas can be achieved, the tobacco tar can be prevented from entering the air passage and being adsorbed on the MEMS chip 33 of the MEMS airflow sensor 30, and the probability of false triggering of the electronic atomizer can be reduced.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the MEMS airflow sensor 30 includes:

a substrate 31, wherein the substrate 31 is disposed on the front surface of the PCB 10 and is stacked above the through hole 11, the substrate 31 is electrically connected to the PCB 10, and the substrate 31 is provided with the second air hole 311;

the first cover 32 is covered on the substrate 31 and forms a mounting cavity 323 with the substrate 31, the surface of the first cover 32 is provided with the first air hole 3211 communicated with the mounting cavity 323, and the oil-proof air permeable member 40 is attached to the outer surface of the first cover 32 to cover the first air hole 3211; and

and the MEMS chip 33, wherein the MEMS chip 33 is disposed on the substrate 31 and is disposed in the mounting cavity 323, and the MEMS chip 33 is electrically connected with the substrate 31.

In an embodiment of the present utility model, the MEMS airflow sensor 30 includes a substrate 31, a first housing 32, and a MEMS chip 33, where the substrate 31 is a PCB, the MEMS chip 33 is fixed on the substrate 31, and the first housing 32 covers the substrate 31 and forms a mounting cavity 323, so as to complete the presetting of the MEMS airflow sensor 30. When the PCBA control module 100 is assembled, the preset MEMS airflow sensor 30 is soldered on the PCB board 10 by Surface Mount Technology (SMT), so as to assemble the PCBA control module 100, thereby improving the assembly efficiency of the PCBA control module 100.

The first housing 32 and the substrate 31 are respectively provided with a first air hole 3211 and a second air hole 311, the MEMS chip 33 is overlapped above the second air hole 311, when gas enters the air passage from the through hole 11 or the first air hole 3211, the oil-proof air-permeable member 40 filters out tobacco tar in the gas and isolates the tobacco tar outside the air passage, so that the separation of the gas and the tobacco tar is realized, the gas entering the air passage does not contain the tobacco tar, the tobacco tar is prevented from being adsorbed on the MEMS chip 33, the service life of the MEMS chip 33 is prolonged, and the false triggering probability of the electronic atomizer is reduced.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the first housing 32 includes:

a top plate 321, wherein the top plate 321 is disposed opposite to the base plate 31, the first air holes 3211 are penetrating through the top plate 321 toward one side of the base plate 31, and the oil-proof air permeable member 40 is attached to one side of the top plate 321 away from the base plate 31; and

the side plate 322 is located between the top plate 321 and the base plate 31, the top of the side plate 322 is connected with the top plate 321, the bottom of the side plate 322 is connected with the base plate 31, and the side plate 322, the top plate 321 and the base plate 31 enclose the mounting cavity 323.

In the technical solution of an embodiment of the present utility model, the first housing 32 includes a top plate 321 and a side plate 322, where the top plate 321 is opposite to the substrate 31, a second air hole 311 is formed on the substrate 31, a first air hole 3211 is formed on the top plate 321, the first air hole 3211 and the second air hole 311 implement convection, and the MEMS chip 33 is located between the first air hole 3211 and the second air hole 311 and is stacked above the second air hole 311 to implement communication of air paths in the air flue.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the MEMS airflow sensor 30 further includes a detection IC (not shown), where the detection IC is disposed on the substrate 31 and is located in the mounting cavity 323, and the detection IC is electrically connected to the substrate 31.

In the technical scheme of an embodiment of the utility model, the detection IC is located in the mounting cavity 323 and is electrically connected with the substrate 31 and the MEMS chip 33, and an airflow detection algorithm is integrated in the detection IC, which has self-adaptive primary capacitance parameters, can adapt to environmental changes such as temperature and humidity, reduces the trigger delay of the MEMS chip 33, supports blowback protection, reduces the static power consumption of the electronic atomizer, and improves the applicability of the detection IC in various use environments of the PCBA control template.

Referring to fig. 1 to 3, in an embodiment of the utility model, the PCBA control module 100 further includes a second housing 50, where the second housing 50 covers the opposite surface of the PCB 10 and forms an air cavity 53 with the PCB 10.

In the technical scheme of the embodiment of the utility model, the second housing 50 is covered on the back surface of the PCB board 10, the second housing 50 and the PCB board 10 are enclosed to form the air cavity 53, the air cavity 53 can be used for mounting electronic components with poor tolerance to tobacco tar, the air cavity 53 can prevent external tobacco tar from being adsorbed on the electronic components mounted in the air cavity 53, and the service life of the electronic components mounted in the air cavity 53 is prolonged.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the through hole 11 is located at the bottom wall of the air cavity 53, a third air hole 511 communicating with the air cavity 53 is provided on the surface of the second housing 50, the first air hole 3211, the second air hole 311, the through hole 11, the air cavity 53, and the third air hole 511 are sequentially communicated to form the air passage, and the oil-proof air-permeable member 40 is attached to the outer surface of the second housing 50 to cover one end of the air passage.

In the technical scheme of the embodiment of the utility model, when the oil-proof ventilation member 40 is directly attached to the through hole 11 on the back surface of the PCB 10, the oil-proof ventilation member 40 is difficult to fix and is easy to separate from the PCB 10, so that the effect of blocking tobacco tar is not achieved. Therefore, the third air hole 511 is formed in the second housing 50, and the oil-proof air-permeable member 40 is attached to the second housing 50 to cover the third air hole 511, so that the fixing effect of the oil-proof air-permeable member 40 is improved, the smoke oil is prevented from entering the air passage, and the false triggering probability of the electronic atomizer is reduced.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the second housing 50 includes:

the cover plate 51 is arranged opposite to the PCB 10, the third air hole 511 is formed in a penetrating manner on one side of the cover plate 51 facing the PCB 10, and the oil-proof air-permeable member 40 is attached to one side of the cover plate 51 facing away from the PCB 10; and

the bounding wall 52, bounding wall 52 is located apron 51 with PCB board 10 is between, the top of bounding wall 52 with apron 51 is connected, the bottom of bounding wall 52 with PCB board 10 is connected, bounding wall 52 with apron 51, PCB board 10 encloses and is formed with air cavity 53.

In the technical solution of an embodiment of the present utility model, the second housing 50 includes a cover plate 51 and a surrounding plate 52, where the surrounding plate 52 may be fixed on the opposite surface of the PCB board 10 by welding, clamping, and bonding, and the cover plate 51 and the surrounding plate 52 may be fixedly connected or detachably connected, and the connection manner of the cover plate 51 and the surrounding plate 52 is not limited. The apron 51 is equipped with third gas pocket 511, and PCB board 10 is equipped with through-hole 11, and third gas pocket 511 realizes convection current with through-hole 11, and grease proofing ventilative spare 40 paste the outside of locating apron 51 to closing cap third gas pocket 511 has improved the fixed effect of grease proofing ventilative spare 40, in order to block tobacco tar entering air flue, reduces the probability that electronic atomizer triggered by mistake.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the PCBA control module 100 further includes a control IC (not shown), where the control IC is disposed on the PCB 10 and is electrically connected to the PCB 10, for acquiring the capacitance change of the MEMS airflow sensor 30.

In the technical solution of an embodiment of the present utility model, the PCBA control module 100 further includes a control IC, where the control IC has a larger volume than the MEMS chip 33, and the installation of the control IC in the installation cavity 323 results in an excessively large volume of the first housing 32, which is inconvenient for bonding and controlling the cost, so that the control IC may be disposed outside the first housing 32, may be disposed on the front side of the PCB 10, may be disposed on the back side of the PCB 10, and may also be disposed in the air cavity, where the control IC is electrically connected with the PCB 10 and the MEMS airflow sensor 30.

When a user has a smoking or blowing action, air flows into the air passage, a pressure difference exists between the air pressure in the air passage and the air pressure of the external environment, the capacitor structure of the MEMS chip 33 is deformed, so that the capacitance value is changed, the control IC electrically connected with the MEMS airflow sensor 30 detects an electric signal of the capacitance change, and the action signal of smoking or blowing by the user is transmitted to the PCB 10 to control the working state of the electronic atomizer.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the oil-repellent air permeable member 40 is an oil-repellent net.

In the technical scheme of the embodiment of the utility model, the oil-proof net can enable gas to pass through, but grease cannot pass through. The arrangement of the oil-proof net can prevent tobacco tar from entering the air passage and being adsorbed on the MEMS chip 33, and reduce the probability of false triggering of the electronic atomizer.

Referring to fig. 1 to 3, the present utility model further provides an electronic atomizer (not shown), which includes a PCBA control module 100, and the specific structure of the PCBA control module 100 refers to the above embodiment, and since the electronic atomizer adopts all the technical solutions of all the embodiments, it has at least all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

Among them, electronic atomizers include electronic cigarettes and other atomized products, and the kind and use of the electronic atomizers are not limited herein.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A PCBA control module, characterized by, include:

2. The PCBA control module of claim 1, wherein the MEMS airflow sensor comprises:

3. The PCBA control module of claim 2, wherein the first housing comprises:

4. The PCBA control module of claim 2, wherein the MEMS airflow sensor further comprises a detection IC disposed within the substrate and within the mounting cavity, the detection IC being electrically connected to the substrate.

5. The PCBA control module of claim 1, further comprising a second housing covering the back side of the PCB and enclosing the PCB with an air cavity.

6. The PCBA control module of claim 5, wherein the through hole is located at a bottom wall of the air cavity, a third air hole is provided on a surface of the second housing and is connected to the air cavity, the first air hole, the second air hole, the through hole, the air cavity, and the third air hole are sequentially connected to form the air passage, and the oil-proof air-permeable member is attached to an outer surface of the second housing to cover one end of the air passage.

7. The PCBA control module of claim 6, wherein the second housing comprises:

8. The PCBA control module of claim 1, further comprising a control IC disposed on the PCB and electrically connected to the PCB for acquiring a capacitance change of the MEMS airflow sensor.

9. The PCBA control module of claim 1, wherein the oil resistant breather piece is an oil resistant mesh.

10. An electronic atomiser comprising a PCBA control module as claimed in any one of claims 1 to 9.