CN220403116U - Detection circuit and aerosol-generating device - Google Patents

Abstract

The present application relates to the field of aerosol-generating technology, and in particular to a detection circuit and an aerosol-generating device, the detection circuit comprising a light emitting unit, a light detecting unit and a control unit. The light emission unit is connected with the power supply and used for emitting detection light; the light detection unit and the light emission unit are respectively arranged at two opposite sides of the accommodating channel, and the light detection unit is used for receiving detection light emitted through the accommodating channel; the control unit is connected with the light emitting unit and used for controlling the light emitting unit to emit detection light, and the control unit is connected with the light detecting unit and used for determining whether the aerosol generating substrate is contained in the containing channel according to the detection light received by the light detecting unit. By arranging the light emitting units and the light detecting units on the two opposite sides of the accommodating channel, whether the accommodating channel accommodates the aerosol generating substrate or not can be detected in a correlation mode, the detection accuracy can be effectively improved, and the dry burning of the aerosol generating device can be effectively prevented.

Description

Detection circuit and aerosol-generating device

Technical Field

The present application relates to the field of aerosol-generating technology, and in particular to a detection circuit and an aerosol-generating device.

Background

Before heating an aerosol-generating substrate, the aerosol-generating device needs to detect whether the aerosol-generating substrate is contained or not, and when the aerosol-generating substrate is detected, the heating circuit is started to heat. The existing detection method is easily influenced by factors such as the material type of an aerosol generating substrate, the environment where electronic devices in the aerosol generating device are located, the noise floor of the aerosol generating device and the like, so that misjudgment occurs, and further the risk of dry burning of the aerosol generating device is caused.

Therefore, how to improve the accuracy of detecting whether an aerosol-generating device contains an aerosol-generating substrate and to prevent dry burning of the aerosol-generating device is a need to be addressed.

Disclosure of Invention

The application provides a detection circuitry and aerosol-generating device, through setting up light emission unit and light detection unit in the relative both sides that hold the passageway, light detection unit is used for receiving the detection light that light emission unit sent, realizes detecting to hold the passageway in the mode of correlation and has acceptd aerosol-generating substrate, can effectively improve the degree of accuracy that detects, effectively prevents that aerosol-generating device from appearing dry combustion method.

In a first aspect, the present application provides a detection circuit for use in an aerosol-generating device comprising a receiving channel for receiving an aerosol-generating substrate, the detection circuit comprising: the light emission unit is connected with the power supply and is used for emitting detection light; the light detection unit and the light emission unit are respectively arranged at two opposite sides of the accommodating channel, and the light detection unit is used for receiving detection light emitted through the accommodating channel; the control unit is connected with the light emitting unit and used for controlling the light emitting unit to emit detection light, and the control unit is connected with the light detecting unit and used for determining whether the aerosol generating substrate is contained in the containing channel according to the detection light received by the light detecting unit.

In some embodiments, the light emitting unit includes a light emitting element connected to the power supply through a switching element connected to the control unit; the switch element is used for conducting the light-emitting element and the power supply according to the conducting signal of the control unit so that the light-emitting element emits detection light.

In some embodiments, the light emitting unit includes a light emitting element, and the light detecting unit includes a light sensing element connected to the power supply, the control unit, and the light emitting element; the light sensing element is used for controlling the light emitting element to emit detection light according to the signal of the control unit.

In some embodiments, the light emission control pin of the photosensitive element is connected with the light emitting element, and the photosensitive element controls the light emitting element to emit detection light through the light emission control pin.

In some embodiments, the light emitting element is an infrared light emitting diode, an anode of the infrared light emitting diode is connected to the power supply, and a cathode of the infrared light emitting diode is connected to the photosensitive element.

In some embodiments, the light emitting unit further includes a first capacitor, a first end of the first capacitor is connected to the anode of the infrared light emitting diode, and a second end of the first capacitor is grounded.

In some embodiments, the detection circuit further comprises a filtering unit, and the filtering unit is connected with the control unit and the light detection unit; the filtering unit is used for filtering the voltage output to the light detection unit.

In some embodiments, the filter unit includes a second capacitor, a first resistor, and a third capacitor; the first end of the second capacitor is connected with the voltage output end of the control unit, the second end of the second capacitor is grounded, the first end of the first resistor is connected with the voltage output end of the control unit, the second end of the first resistor is connected with the light detection unit, the first end of the third capacitor is connected with the second end of the first resistor, and the second end of the third capacitor is grounded.

In a second aspect, the present application also provides an aerosol-generating device comprising a heating circuit and a detection circuit as described above, the heating circuit being connected to the detection circuit; the detection circuit is adapted to allow activation of the heating circuit in case the aerosol-generating substrate is received in a receiving channel in the aerosol-generating device.

In some embodiments, the aerosol-generating device further comprises a main switch connected to the heating circuit, the main switch controlling the heating circuit to initiate heating in case the detection circuit determines that an aerosol-generating substrate is received within the receiving channel.

In some embodiments, the detection circuit is configured to determine whether an aerosol-generating substrate is received within the receiving channel at predetermined intervals during heating by the heating circuit, and to stop the heating circuit if it is determined that no aerosol-generating substrate is received within the receiving channel.

The application discloses a detection circuit and aerosol-generating device, the detection circuit includes light emission unit, light detection unit and control unit. The light emission unit is connected with the power supply and is used for emitting detection light; the light detection unit and the light emission unit are respectively arranged at two opposite sides of the accommodating channel, and the light detection unit is used for receiving detection light emitted through the accommodating channel; the control unit is connected with the light emitting unit and used for controlling the light emitting unit to emit detection light, and the control unit is connected with the light detecting unit and used for determining whether the aerosol generating substrate is contained in the containing channel according to the detection light received by the light detecting unit. The technical scheme in this application sets up light emission unit and light detection unit in the relative both sides that hold the passageway, when detecting, makes light emission unit to hold the passageway in the emission of light to detect light and get into and hold the passageway, light detection unit receives the light that passes through holding the passageway and jet out. When the aerosol-generating substrate is accommodated in the accommodating channel, the detection light enters the accommodating channel and is blocked by the aerosol-generating substrate, and conversely, when the aerosol-generating substrate is not accommodated in the accommodating channel, the light detection unit receives more light, so that whether the aerosol-generating substrate is accommodated or not can be determined by analyzing the light received by the light detection unit. According to the technical scheme, whether the accommodating channel accommodates the aerosol generating substrate is detected in a correlation mode, misjudgment is greatly reduced, detection accuracy can be effectively improved, and dry burning of the aerosol generating device is effectively prevented.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of an aerosol-generating device provided in an embodiment of the present application;

fig. 2 is a schematic view of another aerosol-generating device provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a detection circuit according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram of a light emitting unit according to an embodiment of the present application;

FIG. 5 is a schematic diagram of another detection circuit provided in an embodiment of the present application;

FIG. 6 is a schematic diagram of another detection circuit provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of a portion of another detection circuit provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of a portion of another detection circuit provided in an embodiment of the present application;

fig. 9 is a schematic diagram of another detection circuit according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.

It is to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic diagram of an aerosol-generating device 10 according to an embodiment of the present application, where the aerosol-generating device 10 is capable of heating an aerosol-generating substrate for inhalation by a user, and the aerosol-generating substrate may be cut tobacco, tobacco leaf, a cigarette, tobacco or a cartridge. As shown in fig. 1, the aerosol-generating device 10 comprises a heating circuit 100 and a detection circuit 200. Wherein the heating circuit 100 is connected with the detection circuit 200; the detection circuit 200 is used to allow the heating circuit 100 to be activated in case an aerosol-generating substrate is contained in the aerosol-generating device 10, the heating circuit 100 may be a thick film circuit.

It should be noted that, in addition to the heating circuit 100 and the detecting circuit 200, the aerosol-generating device 10 further comprises a receiving channel (not shown in the figures) for receiving an aerosol-generating substrate. A heating element is provided in or outside the accommodation channel, and is connected to the heating circuit 100. In some embodiments, the receiving channel may also be defined by a heat generating component. After the heating circuit 100 is started, the heating element may be energized to heat the heating element, so as to heat the aerosol-generating substrate accommodated in the accommodating channel.

In some embodiments, the detection circuit 200 is configured to determine whether the aerosol-generating substrate is received in the receiving channel at predetermined intervals during heating by the heating circuit 100, and to stop the heating circuit 100 if it is determined that the aerosol-generating substrate is not received in the receiving channel. The preset time may be set according to practical situations, for example, 1 second, 2 seconds, or 3 seconds, and specific values are not limited herein.

For example, the detection circuit 200 may send a stop heating signal to the heating circuit 100 upon determining that no aerosol-generating substrate is received in the receiving channel, such that the heating circuit 100 stops heating according to the stop heating signal.

Referring to fig. 2, fig. 2 is a schematic diagram of another aerosol-generating device 10 according to an embodiment of the present application. As shown in fig. 2, the aerosol-generating device 10 may further comprise a main switch 300 and a power supply 400, the power supply 400 being connected to the heating circuit 100 via the main switch 300, the detection circuit 200 controlling the main switch 300 to switch on the connection of the power supply 400 to the heating circuit 100 in order to enable the heating circuit 100 to start heating, in case it is determined that an aerosol-generating substrate is accommodated in the accommodation channel by the detection circuit 200.

For example, when the detection circuit 200 determines that the aerosol-generating substrate is accommodated in the accommodating channel, the detection circuit may send a turn-on signal to the main switch 300, and the main switch 300 turns on the connection between the heating circuit 100 and the power supply 400 according to the turn-on signal, and the power supply 400 outputs an operating voltage to the heating circuit 100, so that the heating circuit 100 starts heating.

The main switch 300 may include, but is not limited to, a transistor, a MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, a Metal-Oxide-semiconductor field effect transistor), an IGBT transistor (Insulated Gate Bipolar Transistor ), an optocoupler, and the like. In the embodiment of the present application, by providing the main switch 300, connection and disconnection between the heating circuit 100 and the power supply 400 can be conveniently controlled.

In some embodiments, the detection circuit 200 is configured to determine whether the aerosol-generating substrate is received in the receiving channel at predetermined intervals during heating by the heating circuit 100, and to stop the heating circuit 100 if it is determined that the aerosol-generating substrate is not received in the receiving channel. The preset time may be set according to practical situations, for example, 1 second, 2 seconds, or 3 seconds, and specific values are not limited herein.

For example, the detection circuit 200 may send a turn-off signal to the main switch 300 upon determining that the aerosol-generating substrate is not received in the receiving channel, and the main switch 300 disconnects the heating circuit 100 from the power supply 400 according to the turn-off signal, so that the heating circuit 100 stops heating.

In the above embodiment, by determining whether the aerosol-generating substrate is accommodated in the accommodating passage at predetermined intervals during the heating by the heating circuit 100 and stopping the heating circuit 100 if it is determined that the aerosol-generating substrate is not accommodated in the accommodating passage, the heating is prevented from being continued after the aerosol-generating substrate is taken out, and the occurrence of dry burning of the aerosol-generating device 10 can be effectively prevented. In addition, the detection circuit 200 may cause the heating circuit 100 to continue to operate in the event that it is determined that the aerosol-generating substrate is received within the receiving channel to heat the aerosol-generating substrate sufficiently to facilitate continued aerosol generation.

Referring to fig. 3, fig. 3 is a schematic diagram of a detection circuit 200 according to an embodiment of the present application. As shown in fig. 3, the detection circuit 200 includes a light emitting unit 210, a light detecting unit 220, and a control unit 230.

The light emitting unit 210 is connected to a power source, and the light emitting unit 210 is configured to emit detection light. The light detecting unit 220 and the light emitting unit 210 are respectively disposed at opposite sides of the receiving channel, and the light detecting unit 220 is used for receiving the detecting light emitted through the receiving channel. The control unit 230 is connected to the light emitting unit 210 and is used for controlling the light emitting unit 210 to emit detection light, and the control unit 230 is connected to the light detecting unit 220 and is used for determining whether the aerosol-generating substrate is contained in the containing channel according to the detection light received by the light detecting unit 220.

It should be noted that, by respectively disposing the light detecting unit 220 and the light emitting unit 210 at opposite sides of the accommodating channel, the detected light emitted by the light emitting unit 210 may reach the light detecting unit 220 through the accommodating channel, so as to realize that whether the accommodating channel accommodates the aerosol-generating substrate in a correlation manner, thereby effectively improving the accuracy of detection and effectively preventing the aerosol-generating device 10 from generating dry combustion. It can be understood that whether the accommodating channel accommodates the aerosol generating substrate is detected in a correlation manner, so that the situation that misjudgment is caused by the influence of factors such as the type of materials of the aerosol generating substrate, the environment where the electronic device in the aerosol generating device is positioned, the noise floor of the aerosol generating device and the like during detection can be effectively avoided, and the detection accuracy can be effectively improved.

By way of example, the control Unit 230 may include, but is not limited to, an MCU (Micro-controller Unit), a CPU (Central Processing Unit ), a ARM (Advanced RISC Machine) processor, an application specific Integrated Circuit (Application Specific Integrated Circuit, ASIC), and the like.

For example, upon receiving the detection signal transmitted from the control unit 230, the light emitting unit 210 may emit the detection light according to the detection signal. When the light detection unit 220 receives the detection light, the parameter information of the detection light may be sent to the control unit 230, and the control unit 230 determines whether the aerosol-generating substrate is contained in the containing channel according to the parameter information sent by the light detection unit 220. For example, the parameter information may be compared with a preset parameter threshold, and when the parameter value in the light information is smaller than the parameter threshold, it is determined that the aerosol-generating substrate is accommodated in the accommodating channel; when the parameter value in the light ray information is larger than or equal to the parameter threshold value, the fact that the aerosol generating substrate is not contained in the containing channel is determined. The parameter threshold may be set according to practical situations, and specific values are not limited herein.

In some embodiments, the control unit 230 may send a heating signal to the heating circuit 100 upon determining that the aerosol-generating substrate is received within the receiving channel, the heating circuit 100 initiating heating in accordance with the heating signal. The control unit 230 may send a heating prohibiting signal to the heating circuit 100 when it is determined that no aerosol-generating substrate is accommodated in the accommodation channel, the heating circuit 100 not initiating heating.

In other embodiments, for example, the control unit 230 may send a turn-on signal to the main switch 300 upon determining that the aerosol-generating substrate is received within the receiving channel, the main switch 300 turning on the connection between the heating circuit 100 and the power supply 400 according to the turn-on signal, such that the heating circuit 100 initiates heating. For another example, the control unit 230 may transmit a turn-off signal to the main switch 300 when it is determined that the aerosol-generating substrate is not received in the receiving channel, and the main switch 300 disconnects the heating circuit 100 from the power supply 400 according to the turn-off signal so that the heating circuit 100 stops heating.

Referring to fig. 4, fig. 4 is a schematic diagram of a light emitting unit 210 according to an embodiment of the present application. As shown in fig. 4, the power supply 400 is denoted VCC, and the light emitting unit 210 includes a light emitting element 2101 and a switching element 2102, the light emitting element 2101 is connected to the power supply VCC through the switching element 2102, and the switching element 2102 is connected to the control unit 230. The switching element 2102 is configured to turn on the light emitting element 2101 and the power VCC according to a control signal of the control unit 230, so that the light emitting element 2101 emits detection light.

By way of example, the light emitting elements 2101 may include, but are not limited to, infrared light emitting diodes, white light diodes, ultraviolet light diodes, and the like. The switching element 2102 may include, but is not limited to, a transistor, a MOS transistor, an IGBT transistor, an optocoupler, and the like.

For example, the switching element 2102 may be an N-type transistor. The base of the switching element 2102 is connected to the control unit 230, the collector of the switching element 2102 is connected to a power supply through a current limiting resistor R0, the emitter of the switching element 2102 is connected to a first terminal of the light emitting element 2101, and a second terminal of the light emitting element 2101 is grounded. Upon receiving a control signal of a high level output from the control unit 230, the switching element 2102 turns on the light emitting element 2101 and the power source VCC so that the light emitting element 2101 emits detection light.

The current limiting resistor R0 is used to limit the magnitude of the current flowing through the collector of the switching element 2102 to protect the switching element 2102.

By providing the light emitting element 2101 connected to the control unit 230 through the switching element 2102, the light emitting element 2101 can be directly controlled by the control unit 230 to emit detection light, so that control logic can be simplified and control can be facilitated.

Referring to fig. 5, fig. 5 is a schematic diagram of another detection circuit 200 according to an embodiment of the present application. As shown in fig. 5, the light emitting unit 210 includes a light emitting element 2103, the light detecting unit 220 includes a photosensitive element 2201, and the photosensitive element 2201 is connected to the power source 400, the control unit 230, and the light emitting element 2103. Wherein the photosensitive element 2201 is configured to control the light emitting element 2103 to emit detection light according to a signal of the control unit 230.

In the embodiment of the present application, the photosensitive element 2201 may operate according to the operating voltage output by the power supply 400, or may operate according to the operating voltage output by the control unit 230.

By connecting the photosensitive element 2201 and the light emitting element 2103, it is possible to control the light emitting element 2103 to emit detection light by the photosensitive element 2201 according to the signal of the control unit 230, and it is unnecessary to use an additional switch to control the light emitting element 2103 to emit detection light, so that the circuit structure can be simplified, and the circuit cost can be effectively reduced.

In some embodiments, the light emission control pin of the photosensitive element 2201 is connected to the light emitting element 2103, and the photosensitive element 2201 controls the light emitting element 2103 to emit detection light through the light emission control pin.

Referring to fig. 6, fig. 6 is a schematic diagram of another detection circuit 200 according to an embodiment of the present application. As shown in fig. 6, the photosensitive element 2201 may be a photosensitive chip S1, and a photosensitive material is disposed on a surface of the photosensitive chip S1 and is used for receiving light. The photosensitive chip S1 includes a power supply pin (VDD pin in the drawing), a first communication pin (SCL pin in the drawing), a ground pin (GND pin in the drawing), a power supply pin (LEDA pin in the drawing), a light emission control pin (LDR pin in the drawing), an empty pin (NC pin in the drawing), an interrupt pin (INT pin in the drawing), and a second communication pin (SDA pin in the drawing).

It should be noted that, the power supply pin VDD is connected to the voltage output terminal io_vdd of the control unit 230, and is configured to receive the working voltage output by the control unit 230; the first communication pin SCL and the second communication pin SDA are used for communication with the control unit 230. The power pin LEDA is an infrared diode power pin inside the photosensitive element 2201, and is not used in the embodiment of the present application. The light emission control pin LDR is connected to the light emitting element 2103, and is used for controlling the light emitting element 2103 to emit detection light. In this embodiment, the photosensitive chip S1 may be an infrared photo-sensor JSA1233. In other embodiments, other types of light sensing elements may be used.

As shown in fig. 6, the light emitting element 2103 is an infrared light emitting diode D1, the anode of the infrared light emitting diode D1 is connected to the power source VCC, and the cathode of the infrared light emitting diode D1 is connected to the photosensitive element 2201. For example, the cathode of the infrared light emitting diode D1 is connected to the light emission control pin LDR of the photosensitive chip S1.

In the embodiment of the present application, the light emitting element 2103 may be other types of light emitting diodes besides the infrared light emitting diode D1, which is not limited herein.

Illustratively, the photosensitive element 2201, upon receiving the signal from the control unit 230, controls the infrared light emitting diode D1 to emit the detection light. For example, since the anode of the infrared light emitting diode D1 is connected to the power source VCC, the photosensitive element 2201 is connected to the cathode of the infrared light emitting diode D1 to form a path so that the infrared light emitting diode D1 emits detection light. It should be noted that, after the photosensitive chip S1 is powered on, it is first initialized, the current level of the light emitting control pin LDR is configured, and then the light emitting control pin LDR is turned on to supply power to the infrared light emitting diode D1, so that the infrared light emitting diode D1 emits the detection light.

In the above embodiment, by connecting the cathode of the infrared light emitting diode D1 with the light emission control pin LDR of the photosensitive chip S1, the photosensitive element 2201 can control the infrared light emitting diode D1 to emit the detection light through the light emission control pin LDR, so that the circuit structure can be simplified and the circuit cost can be effectively reduced.

In some embodiments, as shown in fig. 6, the light emitting unit 210 may further include a first capacitor C1, where a first end of the first capacitor C1 is connected to the anode of the infrared light emitting diode D1, and a second end of the first capacitor C1 is grounded. The first capacitor C1 is used for filtering signals of the infrared light emitting diode D1.

Referring to fig. 7, fig. 7 is a schematic diagram of a portion of another detection circuit 200 according to an embodiment of the present application. As shown in fig. 7, the detection circuit 200 further includes a filtering unit 240, and the filtering unit 240 is connected to the control unit 230 and the light detection unit 220. The filtering unit 240 is configured to filter the voltage output to the light detecting unit 220.

Illustratively, one end of the filtering unit 240 is connected to the voltage output terminal io_vdd of the control unit 230, and the other end of the filtering unit 240 is connected to the light detecting unit 220. When the control unit 230 outputs a voltage to the light detection unit 220, the filtering unit 240 may filter the voltage output to the light detection unit 220.

As shown in fig. 7, the filtering unit 240 may include a second capacitor C2, a first resistor R1, and a third capacitor C3. The first end of the second capacitor C2 is connected to the voltage output end of the control unit 230, the second end of the second capacitor C2 is grounded, the first end of the first resistor R1 is connected to the voltage output end of the control unit 230, the second end of the first resistor R1 is connected to the light detection unit 220, the first end of the third capacitor C3 is connected to the second end of the first resistor R1, and the second end of the third capacitor C3 is grounded.

For example, the light detecting unit 220 may include a photo chip S1, and a second terminal of the first resistor R1 is connected to a power supply pin VDD of the photo chip S1.

It should be noted that, by providing the filtering unit 240 to filter the voltage output from the control unit 230 to the light detection unit 220, the light detection unit 220 can be ensured to work normally.

Referring to fig. 8, fig. 8 is a schematic diagram of a portion of another detection circuit 200 according to an embodiment of the present application. As shown in fig. 8, the detection circuit 200 further includes a first pull-up unit 250 and a second pull-up unit 260. The light detecting unit 220 may include a photo chip S1, the first pull-up unit 250 includes a second resistor R2, a first end of the second resistor R2 is connected to the power VCC, and a second end of the second resistor R2 is connected to the first communication pin SCL of the photo chip S1. The second pull-up unit 260 includes a third resistor R3, a first end of the third resistor R3 is connected to the power VCC, and a second end of the third resistor R3 is connected to the second communication pin SDA of the photo chip S1.

It should be noted that, the first pull-up unit 250 is configured to pull up the voltage of the first communication pin SCL of the photosensitive chip S1, so that the first communication pin SCL maintains a normal communication state. The second pull-up unit 260 is configured to pull up the voltage of the second communication pin SDA of the photosensitive chip S1, so that the second communication pin SDA maintains a normal communication state. It will be appreciated that the first communication pin SCL, the second communication pin SDA need to operate in a high state when communicating with the control unit 230.

Referring to fig. 9, fig. 9 is a schematic diagram of another detection circuit 200 according to an embodiment of the present application. As shown in fig. 9, when detecting whether the aerosol-generating substrate is accommodated in the accommodating channel of the aerosol-generating device 10, the control unit 230 sends a detection signal to the light-sensing chip S1 in the light-detecting unit 220, and the light-sensing chip S1 turns on the infrared light-emitting diode D1 in the light-emitting unit 210 according to the detection signal, so that the infrared light-emitting diode D1 emits detection light. The photosensitive chip S1 detects the parameter information of the received light, and sends the parameter information of the light to the control unit 230, so that the control unit 230 determines whether the aerosol-generating substrate is contained in the containing channel according to the parameter information of the light.

As shown in fig. 9, before detecting whether the aerosol-generating device 10 has an aerosol-generating substrate accommodated in the accommodating channel, the control unit 230 may further output a voltage to the filtering unit 240 through the voltage output terminal io_vdd, and the voltage is filtered by the filtering unit 240 and then output to the light detection unit 220, so that the light detection unit 220 stably operates.

The detection circuit 200 provided in the above embodiment is applied to the aerosol-generating device 10, and the detection circuit 200 includes a light emitting unit 210, a light detecting unit 220, and a control unit 230. The light emitting unit 210 is connected to the power source VCC, and the light emitting unit 210 is configured to emit detection light. The light detecting unit 220 and the light emitting unit 210 are respectively disposed at opposite sides of the receiving channel, and the light detecting unit 220 is configured to receive the detected light emitted through the receiving channel and send parameter information of the detected light to the control unit. The control unit 230 is connected to the light emitting unit 210 and is used for controlling the light emitting unit 210 to emit detection light, the control unit 230 is further used for determining whether the aerosol-generating substrate is contained in the containing channel according to the parameter information sent by the light detecting unit 220, when the aerosol-generating substrate is determined to be contained in the containing channel, the control unit 230 controls the heating circuit 100 to start heating, and when the aerosol-generating substrate is determined not to be contained in the containing channel, the control unit 230 does not control the heating circuit 100 to start heating or controls the heating circuit 100 to stop heating. According to the technical scheme, the light emitting unit 210 and the light detecting unit 220 are arranged on the two opposite sides of the accommodating channel, the light emitting unit 210 emits detection light and the light detecting unit 220 receives detection light, whether the accommodating channel accommodates aerosol generating matrixes or not is detected in a correlation mode, misjudgment is greatly reduced, detection accuracy can be effectively improved, and dry burning of the aerosol generating device 10 is effectively prevented.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (11)

1. A detection circuit for use with an aerosol-generating device comprising a receiving channel for receiving an aerosol-generating substrate, the detection circuit comprising:

the light emission unit is connected with the power supply and is used for emitting detection light;

the light detection unit and the light emission unit are respectively arranged at two opposite sides of the accommodating channel, and the light detection unit is used for receiving detection light emitted through the accommodating channel;

the control unit is connected with the light emitting unit and used for controlling the light emitting unit to emit detection light, and the control unit is connected with the light detecting unit and used for determining whether an aerosol generating substrate is contained in the containing channel according to the detection light received by the light detecting unit.

2. The detection circuit according to claim 1, wherein the light emitting unit includes a light emitting element and a switching element, the light emitting element is connected to the power supply through the switching element, and the switching element is connected to the control unit;

the switch element is used for conducting the light-emitting element and the power supply according to the conducting signal of the control unit so that the light-emitting element emits detection light.

3. The detection circuit according to claim 1, wherein the light emitting unit includes a light emitting element, the light detecting unit includes a light sensing element, and the light sensing element is connected to the power supply, the control unit, and the light emitting element;

the light sensing element is used for controlling the light emitting element to emit detection light according to the signal of the control unit.

4. A detection circuit according to claim 3, wherein a light emission control pin of the light-sensing element is connected to the light-emitting element, and the light-sensing element controls the light-emitting element to emit detection light through the light emission control pin.

5. A detection circuit according to claim 3, wherein the light emitting element is an infrared light emitting diode, an anode of the infrared light emitting diode is connected to the power supply, and a cathode of the infrared light emitting diode is connected to the light sensing element.

6. The detection circuit of claim 5, wherein the light emitting unit further comprises a first capacitor, a first end of the first capacitor is connected to an anode of the infrared light emitting diode, and a second end of the first capacitor is grounded.

7. The detection circuit according to claim 1, further comprising a filtering unit connected to the control unit and the light detection unit;

the filtering unit is used for filtering the voltage output to the light detection unit.

8. The detection circuit of claim 7, wherein the filter unit comprises a second capacitor, a first resistor, and a third capacitor; the first end of the second capacitor is connected with the voltage output end of the control unit, the second end of the second capacitor is grounded, the first end of the first resistor is connected with the voltage output end of the control unit, the second end of the first resistor is connected with the light detection unit, the first end of the third capacitor is connected with the second end of the first resistor, and the second end of the third capacitor is grounded.

9. An aerosol-generating device comprising a heating circuit and a detection circuit according to any of claims 1-8, the heating circuit being connected to the detection circuit; the detection circuit is adapted to allow activation of the heating circuit in case an aerosol-generating substrate is received in a receiving channel in the aerosol-generating device.

10. An aerosol-generating device according to claim 9, further comprising a main switch connected to the heating circuit, the main switch controlling the heating circuit to initiate heating in the event that the detection circuit determines that an aerosol-generating substrate is received within the receiving channel.

11. An aerosol-generating device according to claim 9 or 10, wherein the detection circuit is arranged to determine whether aerosol-generating substrate is received in the receiving channel at predetermined intervals during heating by the heating circuit, and to stop the heating circuit if it is determined that aerosol-generating substrate is not received in the receiving channel.