SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a conductive liquid dips PCBA detection circuitry and electron cigarette aims at solving and has conductive liquid to dip PCBA in the electron cigarette because of unable accurate detection electron cigarette and lead to the not high technical problem of electron cigarette security among the prior art.
In order to achieve the above object, the present invention provides a detection circuit for conductive liquid immersion in a PCBA, the circuit comprises a processor disposed on a PCB board and at least two conductive rings connected in a staggered manner; the conductive circular ring is connected with the processor; the processor is used for sending a detection signal to the conductive circular ring and receiving a feedback signal returned by the conductive circular ring; the conductive ring is used for detecting whether conductive liquid is immersed after receiving the detection signal, and if so, sending a feedback signal to the processor.
Preferably, the conductive rings have different diameters, and the conductive ring with the smallest diameter is connected to the feedback end of the processor.
Preferably, the conductive liquid immersion PCBA detection circuit further comprises a filter circuit, the filter circuit being connected to the conductive ring and the processor, respectively.
Preferably, the filter circuit comprises a resistor, a first end of the resistor is connected with the conductive ring, and a second end of the resistor is grounded.
Preferably, the filter circuit further comprises a capacitor, a first end of the capacitor is connected with the processor, and a second end of the capacitor is grounded.
Preferably, the conductive liquid immersion PCBA detection circuit further comprises a power supply circuit connected with the processor.
Preferably, the conductive liquid immerses PCBA detection circuitry still includes atomizer drive circuit, atomizer drive circuit with the treater, power supply circuit and atomizer are connected respectively.
Preferably, the conductive liquid immersion PCBA detection circuit further comprises an alarm device connected to the processor.
Preferably, the alarm device is an indicator light and/or a buzzer.
The utility model discloses still provide an electron cigarette, the electron cigarette includes as above electrically conductive liquid dip PCBA detection circuitry.
The circuit of the utility model comprises a processor arranged on the PCB board and at least two conductive rings with staggered connection; the conductive ring is connected with the processor; the processor is used for sending a detection signal to the conductive circular ring and receiving a feedback signal returned by the conductive circular ring; the conductive ring is used for detecting whether the conductive liquid is immersed after receiving the detection signal, and if so, sending a feedback signal to the processor. The utility model discloses whether technical scheme has conductive liquid to dip PCBA in can the accurate detection electron cigarette, has improved the safety in utilization and the life of electron cigarette.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a detection circuit for conductive liquid immersion PCBA, referring to FIG. 1, in one embodiment, the circuit comprises a processor 100 arranged on a PCB board and at least two conductive rings 200 in staggered connection; the conductive ring 200 is connected with the processor 100; the processor 100 is configured to send a detection signal to the conductive ring 200, and receive a feedback signal returned by the conductive ring 200; the conductive ring 200 is configured to detect whether a conductive liquid is immersed after receiving the detection signal, and if so, send a feedback signal to the processor 100.
It can be understood that the PCBA refers to a PCB board with soldered components, the conductive ring 200 and the processor 100 can be directly printed on the surface of the PCB board without adding any high-cost material, the implementation method is simple, the effect is obvious, the detection accuracy of the conductive liquid is high, and the detection accuracy can be adjusted according to the number of the conductive rings 200, which is very convenient.
The conductive rings with staggered connections refer to that the conductive rings can be connected in a concentric circle manner or in a cross manner, which is not limited in this embodiment.
The conductive liquid generally refers to oil stain, smoke oil, water, and the like, and this embodiment is not limited thereto. The liquid has different conductivity, different conductive time and different feedback signal intensity. For example, the tobacco tar does not volatilize and evaporate at normal temperature, and when the tobacco tar is immersed into the substance, short circuit is detected for a long time; if the water-type substance is immersed, the short circuit is detected in a period of time, but the feedback signal is weaker and weakens, and finally disappears.
When treater 100 normal work back can send detected signal, if PCBA is normal when, effectual feedback signal can not be exported to electrically conductive ring 200, when PCBA has the conducting liquid to soak in, electrically conductive ring 200 can to treater 100 sends feedback signal, treater 100 can protect other relevant circuits according to the power of feedback signal, prevents to appear the short circuit problem.
In this embodiment, the PCBA detection circuit further includes a filter circuit 300, and the filter circuit 300 is connected to the conductive ring 200 and the processor 100, respectively.
It is understood that, in order to obtain an effective feedback signal, a filter circuit 300 may be added between the conductive ring 200 and the processor 100, and the filter circuit 300 may also be directly printed on the surface layer of the PCB.
In this embodiment, the conductive liquid immersion PCBA detection circuit further includes a power circuit 400, the power circuit 400 being connected to the processor 100.
It will be appreciated that the power supply circuit is used to power the PCBA and that the ingress of smoke and oil into the PCBA can cause the processor 100 to detect the battery voltage incorrectly, leading to problems with overcharging or overdischarging the battery, and serious threat to consumer safety. After the processor 100 is connected to the power circuit 400, when the processor 100 determines that the immersion event is serious (for example, the detected conductive liquid is not easy to self-volatilize or evaporate) according to the received feedback signal, the power circuit 400 is turned off through a battery control signal, so as to protect the battery.
In this embodiment, the PCBA detection circuit for conductive liquid immersion further includes an atomizer driving circuit 500, and the atomizer driving circuit 500 is connected to the processor 100, the power circuit 400, and the atomizer, respectively.
It can be understood that the atomizer of the electronic cigarette is a heating element, and the battery supplies power to generate heat, so that the tobacco tar beside the atomizer volatilizes to form smoke, thereby achieving the effect of 'cloud swallowing and fog spitting' when people inhale, and the atomizer is an important component in the electronic cigarette and is also a component which is extremely easy to damage and has higher cost. If the processor detects the atomizer inaccurately, the power of the user can be caused to exceed the range seriously or the power can not meet the requirement when smoking, if the power exceeds the range, the atomizer can be caused to be damaged due to overhigh temperature, and if the power can not meet the requirement, the taste of the user when smoking can be influenced.
In specific implementation, the atomizer driving circuit 500 is connected to the processor 100 and the power circuit 400 at the same time, so that the effect of double protection of the atomizer can be achieved. After the processor 100 receives the feedback signal sent by the conductive ring 200, the power supply circuit 400 may be controlled to turn off the power supply to the atomizer, or the atomizer driving circuit 500 may be directly controlled to protect the atomizer.
In this embodiment, the conductive liquid immersion PCBA detection circuit further comprises an alarm device 600, and the alarm device 600 is connected to the processor 100.
In order to enable a user to know the using state of the electronic cigarette more intuitively, the alarm device is connected with the processor, when the processor detects danger, an alarm is timely sent out, the alarm device is an indicator lamp and/or a buzzer, and the embodiment does not limit the use state.
The circuit of the utility model comprises a processor arranged on the PCB board and at least two conductive rings with staggered connection; the conductive ring is connected with the processor; the processor is used for sending a detection signal to the conductive circular ring and receiving a feedback signal returned by the conductive circular ring; the conductive ring is used for detecting whether the conductive liquid is immersed after receiving the detection signal, and if so, sending a feedback signal to the processor. The utility model discloses whether technical scheme has conductive liquid to dip PCBA in can the accurate detection electron cigarette, has improved the safety in utilization and the life of electron cigarette.
As shown in fig. 2, fig. 2 is a schematic diagram of the filter circuit 300 in fig. 1.
In this embodiment, the filter circuit 700 includes a resistor R, a first end of the resistor R is connected to the conductive ring 200, and a second end of the resistor R is grounded.
It can be understood that the resistor R is a steady-state resistor, which can eliminate static voltage and interference voltage in the circuit.
Further, the filter circuit 700 further includes a capacitor C, a first end of the capacitor C is connected to the processor 100, and a second end of the capacitor C is grounded.
It can be understood that the capacitor C is a filter capacitor for eliminating circuit interference voltage and integrating process, so that the feedback signal of the conductive ring 200 is more stable.
This embodiment can filter the signal of electrically conductive ring feedback through increase steady state resistance and filter capacitance in filter circuit, makes the treater obtain effectual feedback signal, increases the rate of accuracy that detects.
As shown in fig. 3, fig. 3 is a schematic structural diagram of the conductive ring 200 in fig. 1.
In this embodiment, the conductive rings 200 have different diameters, and the conductive ring with the smallest diameter is connected to the feedback end of the processor.
It should be noted that the embodiment uses concentric conductive rings, but the arrangement of the conductive rings may be other manners, and the embodiment is only one of them. The conductive ring with the smallest diameter in the conductive rings 200 is connected to the feedback end of the processor 100, and is configured to send a feedback signal to the processor 100, and the conductive rings with other diameters are connected to the output end of the processor 100, and are configured to receive a detection signal.
It is understood that the circular area is a conductive ring with staggered connection, the number of the conductive ring 200 can be increased or decreased according to practical requirements, a minimum of two rings are required, and the maximum number is not limited. The more the number of loops, the higher the accuracy of the detection.
The region between the rings is the detection zone, and under normal conditions, the detection zone should not be covered by impurity, prevents to detect liquid. The conductive ring 200 is off when the detection zone is free of conductive liquid, and the conductive ring 200 is on when the detection zone is immersed in conductive liquid.
This embodiment uses the electrically conductive ring of coaxial setting to immerse the detection to conductive liquid, and not traditional physics greasy dirt prevention is handled, can not only accurately detect out whether have conductive liquid in the electron cigarette, can also send the feedback signal of different intensity according to conductive liquid's the electric conductivity difference, makes the treater judge to control and protect other circuits.
The working principle of the conductive liquid immersion PCBA detection circuit of the present invention is described below with reference to FIGS. 1 to 3:
when the electronic cigarette is started to work, the processor 100 sends a detection signal to the conductive ring 200, the conductive ring 200 detects whether conductive liquid is immersed after receiving the detection signal, and if not, the processor 100 cannot receive a feedback signal and works normally. If the detected signal exists, the conductive ring 200 sends an attenuation signal of the detection signal, i.e. a feedback signal to the processor 100, and the feedback signal has different intensity according to the conductivity of the conductive liquid. The feedback signal is filtered by the filter circuit 300 to obtain an effective feedback signal, the processor 100 receives the effective feedback signal and judges the severity of the immersion of the conductive liquid according to the source and the intensity of the signal, if the immersion is serious, if the immersion is detected to be in the case of non-volatile liquid such as tobacco tar, the processor 100 directly controls the atomizer driving circuit 500 to turn off the output of the atomizer, and simultaneously the power circuit 400 is turned off through a battery control signal and triggers the alarm device 600 to alarm so as to remind a user to turn off the power supply, thereby achieving the purpose of multiple protection.
The utility model also provides an electronic cigarette, the electronic cigarette includes that the conductive liquid soaks PCBA detection circuitry as above, the circuit structure that the conductive liquid of electronic cigarette soaks PCBA detection circuitry can refer to above-mentioned embodiment, and no longer give details here; it can be understood that, since the electronic cigarette of this embodiment adopts the above-mentioned technical solution of immersing the PCBA detection circuit in the conductive liquid, the electronic cigarette has all the above-mentioned advantages.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.