Electronic atomization device

Abstract

The utility model provides an electronic atomization device which comprises a power source assembly and an atomizer. The atomizer comprises a heating element. The power supply assembly comprises a battery cell; the first electric connection end and the second electric connection end are used for keeping contact with the corresponding electric connection ends of the heating element when the atomizer is connected with the power supply assembly; the second electric connection end is grounded; the resistance detection branch circuit is electrically connected between the battery cell and the first electric connection end; the resistance detection branch comprises a first switch circuit and a first resistor which are connected in series; the control unit is provided with a first control pin electrically connected with the control end of the first switching circuit and a sampling pin electrically connected with the first electric connection end; the control unit controls the first switching circuit to be connected or disconnected through the first control pin, and obtains the voltage of the first electric connection end through the sampling pin. Whether the atomizer is connected with the power supply assembly or the resistance value of the heating element can be determined by acquiring the voltage of the first electric connection end through one pin; the circuit is simple in design and low in cost.

Description

Technical Field

[0001] The present application relates to the technical field of electronic atomization, and in particular to an electronic atomization device. Background Art

[0002] An electronic atomizer is an electronic product that generates aerosol for users to inhale by heating a liquid matrix, such as e-liquid. It generally consists of two parts: an atomizer and a power supply assembly. The atomizer stores the liquid matrix and is provided with a heating element for heating the liquid matrix. The power supply assembly includes a circuit and a battery cell, which can supply power to the heating element to generate heat to generate high temperature to heat the liquid matrix.

[0003] It is usually necessary to detect whether the atomizer is connected to the power supply assembly, and determine the resistance value of the heating element when the atomizer is connected to the power supply assembly. When implementing the above functional modules, the existing device has a complex circuit design and high cost. For example, using different circuit modules, the control unit needs to have multiple IO ports, etc. Utility Model Content

[0004] The present application provides an electronic atomization device, aiming to simplify circuit design and reduce circuit costs.

[0005] The present application provides an electronic atomization device, comprising a power supply assembly, and an atomizer detachably connected to the power supply assembly, wherein the atomizer comprises a heating element for heating an atomized liquid matrix; the power supply assembly comprises:

[0006] Battery cells, used to provide electricity;

[0007] The first electrical connection end and the second electrical connection end are used to keep in contact with the electrical connection end corresponding to the heating element to form an electrical connection when the atomizer is connected to the power supply assembly; wherein the second electrical connection end is grounded;

[0008] a resistance detection branch, electrically connected between the battery cell and the first electrical connection end; the resistance detection branch comprises a first switch circuit and a first resistor connected in series;

[0009] A control unit has a first control pin electrically connected to the control end of the first switch circuit and a sampling pin electrically connected to the first electrical connection end; the control unit controls the first switch circuit to be turned on or off through the first control pin, and obtains the voltage of the first electrical connection end through the sampling pin to determine whether the atomizer is connected to the power supply component or the resistance value of the heating element.

[0010] In one example, the first switch circuit includes a first switch tube;

[0011] The first electrode end of the first switch tube is electrically connected to one end of the first resistor, the other end of the first resistor is electrically connected to the first electrical connection end, the second electrode end of the first switch tube is electrically connected to the battery cell, and the control end of the first switch tube is electrically connected to the control unit.

[0012] In one example, the first switch tube includes a PMOS tube, the drain of the PMOS tube is the first electrode terminal, the source of the PMOS tube is the second electrode terminal, and the gate of the PMOS tube is the control terminal.

[0013] In one example, a second resistor electrically connected between the second electrode terminal and the control terminal of the first switch tube is also included.

[0014] In one example, a third resistor electrically connected between the first electrical connection end and the sampling pin is further included.

[0015] In one example, it further includes a second switch circuit electrically connected between the battery cell and the first electrical connection end;

[0016] The control unit has a second control pin electrically connected to the control end of the second switch circuit, and the control unit controls the second switch circuit to be turned on or off through the second control pin.

[0017] In one example, the second switch circuit and the first switch circuit are not turned on at the same time.

[0018] In one example, the second switch circuit includes a second switch tube;

[0019] The first electrode end of the second switch tube is electrically connected to the first electrical connection end, the second electrode end of the second switch tube is electrically connected to the battery core, and the control end of the second switch tube is electrically connected to the control unit.

[0020] In one example, the second switch tube includes a PMOS tube, the drain of the PMOS tube is the first electrode terminal, the source of the PMOS tube is the second electrode terminal, and the gate of the PMOS tube is the control terminal.

[0021] In one example, a fourth resistor electrically connected between the second electrode terminal and the control terminal of the second switch tube is also included.

[0022] The electronic atomization device provided in the present application can determine whether the atomizer is connected to the power supply component or the resistance value of the heating element by obtaining the voltage of the first electrical connection end through a pin; the circuit design is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1 is a schematic diagram of an electronic atomization device provided in an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a control unit provided in an embodiment of the present application;

[0026] Figure 3 It is a specific circuit diagram provided in the implementation mode of this application. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "electrically connected to" another element, it can be directly electrically connected to the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0029] Figure 1 It is a schematic diagram of the electronic atomization device provided in an embodiment of the present application.

[0030] like Figure 1 As shown, the electronic atomization device 100 includes an atomizer 10 and a power supply assembly 20, and the atomizer 10 is detachably connected to the power supply assembly 20.

[0031] The atomizer 10 includes a liquid storage chamber (not shown) for storing a liquid matrix and a heating element 11, which heats the atomized liquid matrix to form a suckable aerosol under the action of the power provided by the power supply assembly 20. The heating element 11 includes a resistive heating material, and suitable resistive heating materials include but are not limited to: semiconductors, such as doped ceramics, conductive ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic materials and metal materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, Constantan, nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, and iron-containing alloys, as well as superalloys based on nickel, iron, and cobalt, stainless steels, iron-aluminum-based alloys, and iron-manganese-aluminum-based alloys.

[0032] The atomizer 10 also includes a liquid-conducting element not shown. The liquid-conducting element may be, for example, cotton fiber, metal fiber, ceramic fiber, glass fiber or porous ceramic, and the liquid-conducting element may transfer the liquid matrix stored in the liquid storage chamber to the heating element 11 through capillary action. The heating element 11 may be positioned on the liquid-conducting element, and may be, for example, a heating wire, a heating net, a heating film, a heating rod or a heating sheet wound, printed, embedded or sintered on the liquid-conducting element.

[0033] The power supply assembly 20 includes a battery cell 21 and a circuit 22 .

[0034] The battery cell 21 provides power for operating the electronic atomization device 100. The battery cell 21 may be a rechargeable battery cell or a disposable battery cell.

[0035] The circuit 22 can control the overall operation of the electronic atomization device 100. The circuit 22 not only controls the operation of the battery cell 21 and the heating element 11, but also controls the operation of other elements in the electronic atomization device 100.

[0036] The circuit 22 includes at least one control unit. The control unit may include, but is not limited to, a combination of a microcontroller and a memory storing a program executable in the microcontroller, and the memory may be integrated in the microcontroller or independent of the microcontroller.

[0037] Understandably, Figure 1Only the components related to this embodiment are shown. A person skilled in the art should understand that the electronic atomization device may also include other common components other than those shown in the figure. For example, the power supply assembly 20 may also be provided with a puff detector for detecting the user's puffing action and generating a corresponding electrical signal, that is, detecting whether the electronic atomization device is puffed, so that the circuit 22, such as a control unit, controls the operation of the battery cell 21, the heating element 11, etc. according to the electrical signal, for example, controls the battery cell 21 to provide power to the heating element 11, so that the heating element 11 heats the atomized liquid matrix. The puff detector can use a common pressure sensor, a differential pressure sensor, an airflow sensor, and the like.

[0038] Figure 2 It is a schematic diagram of a control unit provided in an embodiment of the present application.

[0039] like Figure 2 As shown, the control unit includes a control pin PWM_OUT, a control pin AT_DET_EN and a sampling pin VOUT_V_ADC.

[0040] Understandably, Figure 2 Only pins related to the present embodiment are shown. A person skilled in the art should understand that the control unit may further include other general pins other than those shown in the figure, such as power supply pins, the power supply pins including a positive power supply pin and a negative power supply pin, the positive power supply pin is electrically connected to the positive electrode of the battery cell 21, and the negative power supply pin is electrically connected to the negative electrode of the battery cell 21.

[0041] Figure 3 It is a specific circuit diagram of the electronic atomization device provided in the embodiment of the present application.

[0042] like Figure 3 As shown, the first electrical connection terminal WH+ and the second electrical connection terminal WH- are used to maintain contact with the electrical connection terminal corresponding to the heating element 11 to form an electrical connection when the atomizer 10 is connected to the power supply assembly 20. For example, the atomizer 10 is provided with two electrical connection terminals, one end of one of the electrical connection terminals is exposed on the surface of the shell of the atomizer 10, the other end of one of the electrical connection terminals is connected to one end of the heating element 11, and one end of the other electrical connection terminal is exposed on the surface of the shell of the atomizer 10, and the other end of the other electrical connection terminal is connected to the other end of the heating element 11. When the atomizer 10 is connected to the power supply assembly 20, the first electrical connection terminal WH+ maintains contact with one end of one of the electrical connection terminals, and the second electrical connection terminal WH- maintains contact with one end of the other electrical connection terminal. The second electrical connection terminal WH- is grounded.

[0043] The resistance detection branch includes a first switch circuit and a resistor R6 connected in series, and the resistance detection branch is electrically connected between the battery cell 21 and the first electrical connection terminal WH+.

[0044] In one example, the first switching circuit includes a switch tube Q3; a first electrode end of the switch tube Q3 is electrically connected to one end of a resistor R6, the other end of the resistor R6 is electrically connected to a first electrical connection end WH+, a second electrode end of the switch tube Q3 is electrically connected to a battery cell 21, and a control end of the switch tube Q3 is electrically connected to a control pin AT_DET_EN of a control unit.

[0045] The switch tube Q3 in the figure is a PMOS tube, the drain of the PMOS tube is the first electrode end of the switch tube Q3, the source of the PMOS tube is the second electrode end of the switch tube Q3, and the gate of the PMOS tube is the control end of the switch tube Q3. The resistor R11 is arranged between the second electrode end and the control end of the switch tube Q3, which can provide a bias voltage for the switch tube Q3 on the one hand, and can also be used as a discharge resistor to discharge the static electricity between the second electrode end and the control end, so as to prevent the switch tube from malfunctioning.

[0046] The resistor R3 is electrically connected between the first electrical connection terminal WH+ and the sampling pin VOUT_V_ADC of the control unit, and the resistor R3 can play a role in current limiting.

[0047] The second switch circuit is electrically connected between the battery cell 21 and the first electrical connection terminal WH+.

[0048] In one example, the second switching circuit includes a switch tube Q1; a first electrode end of the switch tube Q1 is electrically connected to the first electrical connection end WH+, a second electrode end of the switch tube Q1 is electrically connected to the battery cell 21, and a control end of the switch tube Q1 is electrically connected to a control pin PWM_OUT of a control unit.

[0049] The switch tube Q3 in the figure is a PMOS tube, the drain of the PMOS tube is the first electrode end of the switch tube Q1, the source of the PMOS tube is the second electrode end of the switch tube Q1, and the gate of the PMOS tube is the control end of the switch tube Q1. The resistor R2 is electrically connected between the second electrode end and the control end of the switch tube Q3, and its function can refer to the description of the resistor R11.

[0050] The control unit can control the switch tube Q1 to be alternately turned on and off by controlling the pin PWM_OUT, thereby controlling the heating energy supplied by the battery cell 21 to the heating element 11 .

[0051] The control unit can control the switch tube Q3 to be turned on or off by controlling the pin AT_DET_EN, thereby turning on or off the resistance detection loop. The switch tube Q1 and the switch tube Q3 are not turned on at the same time.

[0052] The control unit obtains the voltage of the first electrical connection terminal WH+ through the sampling pin VOUT_V_ADC, and can determine whether the atomizer 10 is connected to the power supply assembly 20 or the resistance value of the heating element 11.

[0053] The following Figure 3 The working process is described as follows:

[0054] When the switch tube Q1 and the switch tube Q3 are both in the disconnected state, the control unit can configure the sampling pin VOUT_V_ADC to output a pull-up level. When the control unit reads the level state of the sampling pin VOUT_V_ADC. If a high level is read, it can be determined that the atomizer 10 and the power supply component 20 are in a disconnected state. If a low level is read, it can be determined that the atomizer 10 and the power supply component 20 are in a connected state.

[0055] When the atomizer 10 is connected to the power supply assembly 20, if it is detected that the electronic atomization device is being inhaled, the control unit outputs a PWM signal with a certain duty cycle to the switch tube Q1 through the control pin PWM_OUT; in this way, the switch tube Q1 is alternately turned on and off under the PWM signal with a certain duty cycle, thereby controlling the heating energy supplied by the battery cell 21 to the heating element 11. Among them, when the control unit outputs a PWM signal to the switch tube Q1 through the control pin PWM_OUT, the switch tube Q3 is in an off state.

[0056] When the switch tube Q1 is turned off and the switch tube Q3 is in the on state, the resistance detection loop is turned on. At this time, the control unit obtains the voltage of the first electrical connection terminal WH+ as the voltage across the heating element 11 through the sampling pin VOUT_V_ADC, and the resistance value of the heating element 11 can be determined by combining the resistance value (known value) of the resistor R6.

[0057] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the present application; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. An electronic atomization device, comprising a power supply assembly, an atomizer detachably connected to the power supply assembly, the atomizer comprising a heating element for heating an atomized liquid matrix; characterized in that: The power supply assembly comprises: Battery cells, used to provide electricity; The first electrical connection end and the second electrical connection end are used to keep in contact with the electrical connection end corresponding to the heating element to form an electrical connection when the atomizer is connected to the power supply assembly; wherein the second electrical connection end is grounded; a resistance detection branch, electrically connected between the battery cell and the first electrical connection end; the resistance detection branch comprises a first switch circuit and a first resistor connected in series; A control unit has a first control pin electrically connected to the control end of the first switch circuit and a sampling pin electrically connected to the first electrical connection end; the control unit controls the first switch circuit to be turned on or off through the first control pin, and obtains the voltage of the first electrical connection end through the sampling pin to determine whether the atomizer is connected to the power supply component or the resistance value of the heating element.

2. The electronic atomization device according to claim 1, characterized in that: The first switch circuit includes a first switch tube; The first electrode end of the first switch tube is electrically connected to one end of the first resistor, the other end of the first resistor is electrically connected to the first electrical connection end, the second electrode end of the first switch tube is electrically connected to the battery cell, and the control end of the first switch tube is electrically connected to the control unit.

3. The electronic atomization device according to claim 2, characterized in that: The first switch tube includes a PMOS tube, the drain of the PMOS tube is the first electrode terminal, the source of the PMOS tube is the second electrode terminal, and the gate of the PMOS tube is the control terminal.

4. The electronic atomization device according to claim 2, characterized in that: It also includes a second resistor electrically connected between the second electrode terminal and the control terminal of the first switch tube.

5. The electronic atomization device according to claim 1, characterized in that: The device also includes a third resistor electrically connected between the first electrical connection end and the sampling pin.

6. The electronic atomization device according to claim 1, characterized in that: Also includes a second switch circuit electrically connected between the battery cell and the first electrical connection end; The control unit has a second control pin electrically connected to the control end of the second switch circuit, and the control unit controls the second switch circuit to be turned on or off through the second control pin.

7. The electronic atomization device according to claim 6, characterized in that: The second switch circuit and the first switch circuit are not turned on at the same time.

8. The electronic atomization device according to claim 6, characterized in that: The second switch circuit includes a second switch tube; The first electrode end of the second switch tube is electrically connected to the first electrical connection end, the second electrode end of the second switch tube is electrically connected to the battery core, and the control end of the second switch tube is electrically connected to the control unit.

9. The electronic atomization device according to claim 8, characterized in that: The second switch tube includes a PMOS tube, the drain of the PMOS tube is the first electrode terminal, the source of the PMOS tube is the second electrode terminal, and the gate of the PMOS tube is the control terminal.

10. The electronic atomization device according to claim 8, characterized in that: It also includes a fourth resistor electrically connected between the second electrode terminal and the control terminal of the second switch tube.

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