Aerosol generating apparatus

Abstract

A fog generating device comprises: a heating unit for heating a fog source; a notification unit for notifying a user of information regarding the heating of the fog source; a control unit for controlling the operation of the notification unit; a control element controlled by the control unit and opening / closing the electrical connection of the notification unit; a first power source for supplying power to the control unit; a second power source for supplying power to the notification unit; and a first switch for using the power supplied from the first power source as an enable signal and controlling the power supply from the second power source to the notification unit.

Description

Atomizing device The present disclosure relates to an atomizing device. In an atomizing device that heats an atomizing source to generate mist, a user interface system circuit such as an LED (Light Emitting Diode) or a vibrator (hereinafter referred to as the "notification unit") is mounted. The operation of these notification units is controlled by an MCU (Micro Controller Unit). [Prior art documents] [Patent documents] Patent Document 1: Japanese Patent Application Laid-Open No. 2021-526007 Patent Document 2: Japanese Patent Application Laid-Open No. 2021-528084 In the MCU (hereinafter referred to as the "control unit"), a lower limit operating voltage is defined. As long as a drive power source equal to or higher than the lower limit operating voltage is supplied to the MCU, the control of the notification unit performed by the control unit will be executed normally. However, the drive power source supplied to the control unit may sometimes drop below the lower limit operating voltage. For example, when the atomizing device is reset. In this case, although the control unit stops controlling, since the threshold voltage of the transistor is lower than the lower limit operating voltage, there may be a situation where an unexpected operation is performed. In view of the above problems, the present disclosure provides a technique for preventing unexpected operations of the notification unit when the drive power source supplied to the control unit is lower than the lower limit operating voltage. As an aspect of the present disclosure, there is provided an atomizing device having: a heating unit that heats an atomizing source; a notification unit that notifies a user of information regarding the heating of the atomizing source; a control unit that controls the operation of the notification unit; a control element that is controlled by the control unit and opens and closes the electrical connection of the notification unit; a first power source that supplies power to the control unit; a second power source that supplies power to the notification unit; and a first switch that uses the power supplied from the first power source for an enabling signal and controls the power supply from the second power source to the notification unit. The notification unit may also include a light emitting element. In addition, in the atomizing device, a voltage dividing circuit that divides the potential of the first power source may be further provided, and the voltage divided by the voltage dividing circuit is used as the enabling signal. Here, the first switch may be configured to turn off the enabling signal at a voltage higher than the lower limit operating voltage of the control unit. In addition, the threshold voltage of the control element is lower than the lower limit operating voltage of the control unit. The atomizing device may also include a third power source different from the second power source that supplies power to the heating unit. It may also be configured such that the power supply from the third power source to the heating unit is controlled by the second control element. Between the third power source and the heating unit, a switch that controls the power supply from the third power source to the heating unit does not include using the power supplied from the first power source for the enabling signal. The heating unit may also be supplied with power from the second power source. It may also be configured such that between the second power source and the heating unit, a switch that controls the power supply from the second power source to the heating unit does not include using the power supplied from the first power source for the enabling signal. The atomizing source may also be a solid. The atomizing source may also be a liquid. According to one aspect of the present disclosure, unexpected operation of the notification unit when the driving power supply supplied to the control unit is lower than the operation lower limit voltage can be prevented. 1: Atomizing device 10: Front panel 10A: Window 20: Main body device 20A: LED 20B: Power button 20C: Magnet 21: USB connector 30: Baffle 40: Rod core type substrate 40A: Substrate part 40B: Suction port part 201: Power supply unit 202: Sensor unit 203: Notification unit 204: Memory unit 205: Communication unit 206: Control unit 207: Heating unit 208: Heat insulation unit 209: Holding unit 209A: Internal space 209B: Opening 209C: Bottom 211: Charging IC 212: Buck-boost DC / DC circuit 213: MCU 213A, 217A, 217B: FET 214: Boost DC / DC circuit 215: Heater switch 216: Heater unit 217: Load switch 218: Voltage dividing circuit 301, 302, 303, 304, 305, 306, 307: Waveform D: Drain terminal EN: Enable terminal G: Gate terminal R1, R2: Resistor S: Source terminal VBAT, VBUS: Power supply Vboost: Boost power supply Vg: Gate voltage Vsys: System power supply Vth: Gate threshold voltage FIG. 1 is a view of the front side of the mist generating device observed from obliquely above. FIG. 2 is a view of the front side of the mist generating device observed from obliquely below. FIG. 3 is a view of the main body device in the state after removing the front panel observed from the front. FIG. 4 is a schematic diagram showing the internal configuration of the main body device. FIG. 5 is a schematic diagram showing the electronic circuit used in Embodiment 1. FIG. 6 is a circuit diagram illustrating an example of the internal configuration of the load switch used in Embodiment 1. FIG. 7 is a diagram illustrating the power supply to the LED when performing a reset operation with the electronic circuit used in Embodiment 1. FIG. 8 is a diagram illustrating the power supply to the LED when performing a reset operation with an electronic circuit without a load switch. FIG. 9 is a schematic diagram showing the electronic circuit used in Embodiment 2. FIG. 10 is a circuit diagram illustrating an example of the internal configuration of the load switch used in Embodiment 2. FIG. 11 is a diagram illustrating the power supply to the LED when performing a reset operation with the electronic circuit used in Embodiment 2. FIG. 12 is a schematic diagram showing the electronic circuit used in Embodiment 2. Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same reference numerals are given to the same parts. <Terms> The mist generating device of each embodiment is a type of electronic cigarette. In the following description, the substance generated by the aerosol generating device is referred to as "aerosol". An aerosol refers to a mixture of minute liquid or solid particles floating in a gas, and air or other gases. In each embodiment, an aerosol generating device that generates an aerosol without combustion is described. In addition, the inhalation of the aerosol generated by the aerosol generating device is also referred to as a "puff". In each embodiment, an aerosol generating device capable of mounting a solid aerosol source is described. In addition, the container storing the solid aerosol source is also referred to as a "capsule" or a "stick-shaped substrate" depending on the product form. The capsule or the stick-shaped substrate is a consumable. Therefore, criteria for replacement are defined for the capsule or the stick-shaped substrate. <Embodiment 1> <Appearance example> First, an appearance example of the aerosol generating device used in Embodiment 1 is described. FIG. 1 is a view of the front side of the aerosol generating device 1 observed from an upper oblique direction. FIG. 2 is a view of the front side of the aerosol generating device 1 observed from a lower oblique direction. FIG. 3 is a view of the main body device 20 with the front panel 10 removed, observed from the front. The aerosol generating device 1 used in this embodiment has a size that can be held by a user with one hand. The aerosol generating device 1 includes: a main body device 20; a front panel 10 mounted on the front of the main body device 20; and a shutter 30 disposed on the upper surface of the main body device 20 and slidable along the upper surface. The front panel 10 is a member that can be disassembled and assembled relative to the main body device 20. The disassembly and assembly of the front panel 10 are performed by the user. As shown in FIGS. 1 and 2, the front panel 10 mounted on the main body device 20 covers the front portion of the main body device 20. In other words, after the front panel 10 is installed, parts other than the front portion of the main body device 20 can also be observed from the outside. For example, the side surface, the back surface, the upper surface, and the bottom surface of the main body device 20 can also be observed from the outside after the front panel 10 is installed. A window 10A is provided in the front panel 10. The window 10A is provided at a position opposite to the light emitting element on the main body device 20 side. In the case of Embodiment 1, the light emitting element uses the LED 20A shown in FIG. 3. In the case of Embodiment 1, eight LEDs 20A are provided in the main body device 20. In addition, the LED 20A is an example of a "notification unit" that notifies information about the heating of the aerosol source. The window 10A in Embodiment 1 is composed of a material that allows light to pass through. Of course, the window 10A can also be a slit that penetrates from the front surface to the back surface. The lighting or flashing mode of the LED 20A is assigned to the operating state of the mist generating device. For example, the lighting or flashing of the LED 20A is assigned to the state regarding the heating of the mist source. In the state regarding the heating of the mist source, for example, there are the completion of the heating preparation of the mist source, the start of heating, the completion or end of heating, the number of tasteable mist sources, the remaining tasteable time, and the abnormality of the body temperature. In addition, the lighting or flashing of the LED 20A is also assigned the occurrence of a failure or malfunction state of the main body device 20, the remaining battery level, the charging in progress or the completion of charging, the pairing state, etc. Among the malfunction states here, an abnormality regarding the ambient temperature is also included. The lighting or flashing of the light emitting element is controlled by the control unit 206 (refer to FIG. 4) described later. The front panel 10 also has the function of buffering the transfer of heat released from the main body device 20, etc. In the case of this embodiment, the generation of mist is permitted only when the front panel 10 is installed on the main body device 20. In this embodiment, the front panel 10 used is deformed by the user pressing a position below the window 10A with a fingertip, and returns to its original shape when the pressing stops. By this deformation, the operation of the power button 20B provided on the main body device 20 can be directly performed in the state where the front panel 10 is installed on the main body device 20. On the bottom side of the main body device 20, a Type-C USB (Universal Serial Bus) connector 21 is provided. The shape or type of the USB connector 21 is only an example. In the case of Embodiment 1, the USB connector 21 is used for charging the power supply unit 201 (refer to FIG. 4) built in the main body device 20. On the upper part of the main body device 20, a hole (not shown) for inserting the rod core type substrate 40 (refer to FIG. 4) storing the mist source is provided. The hole is exposed by sliding the baffle 30 to the open position and hidden by sliding the baffle 30 to the closed position. The rod core type substrate 40 used in this embodiment has a structure in which a solid mist source is stored in a paper tube having a substantially cylindrical shape. For example, a magnet is installed on the back surface of the baffle 30. On the other hand, in the main body device 20, a Hall IC is installed within the movable range of the baffle 30. The Hall IC is a magnetic sensor composed of a Hall element and an operational amplifier, etc., and outputs a voltage corresponding to the intensity of the magnetic field across the Hall IC. In this embodiment, the opening and closing of the baffle 30 is detected from the change in the voltage output from the Hall IC as the baffle 30 slides. That is, it is detected whether the baffle 30 is in the open position or the closed position. As shown in FIG. 3, a power button 20B is disposed substantially at the center of the front surface of the main body device 20. As described above, the power button 20B can be directly operated with the front panel 10 installed. The power button 20B is used, for example, for turning on and off the power of the main body device, turning on and off the power supply to the heating unit 207 (refer to FIG. 4) that heats the mist source, and the pairing instruction of Bluetooth (registered trademark), etc. In addition, if the power button 20B is long-pressed (for example, pressed for 5 seconds or more) with the front panel 10 removed from the main body device 20, the reset function is activated. In this embodiment, BLE (Bluetooth Low Energy) is used as Bluetooth (registered trademark). As shown in FIG. 3, magnets 20C for installing the front panel 10 are disposed at the upper and lower parts of the front surface of the main body device 20. The magnet 20C is provided at a position facing a magnet (not shown) provided inside the front panel 10. For example, if the magnet of the front panel 10 is the N pole, the magnet 20C on the main body device 20 side is the S pole. By the attractive force between the magnets, the front panel 10 can be detachably installed on the main body device 20. In addition, either the magnet on the front panel 10 side or the magnet 20C on the main body device 20 side can be made of iron or other magnetically permeable metal sheets. Incidentally, the installation of the front panel 10 on the main body device 20 is detected by a Hall IC provided on the main body device 20 side. In addition, various electronic components required for generating mist are built in the main body device 20. In Embodiment 1, although the device configuration in which the front panel 10 is installed in the main body device 20 is shown as the mist generating device 1, strictly speaking, the main body device 20 is called the mist generating device. <Internal Structure> FIG. 4 is a schematic diagram showing the internal structure of the main body device 20. In addition, FIG. 4 shows a state in which the rod core type base material 40 is installed in the main body device 20. The internal structure shown in FIG. 4 is for explaining the parts provided in the main body device 20 or the positional relationship thereof. Therefore, the appearance of the parts shown in FIG. 4 does not necessarily need to be the same as the foregoing external view. The main body device 20 is composed of a power supply unit 201, a sensor unit 202, a notification unit 203, a memory unit 204, a communication unit 205, a control unit 206, a heating unit 207, a heat insulation unit 208, and a holding unit 209. As described above, FIG. 4 shows the state in which the rod core type substrate 40 is held by the holding unit 209. In this state, the user inhales the mist. The power supply unit 201 is a unit that supplies power to each part. The power supply unit 201 uses a secondary battery for storing the power required for the main body device 20. In Embodiment 1, for example, a lithium ion secondary battery is used as the secondary battery. The secondary battery can be charged from an external power source. In the case of Embodiment 1, the external power source is supplied through the USB connector 21 (refer to FIG. 2). Hereinafter, the power supplied from the secondary battery is represented as "VBAT", and the power supplied through the USB connector 21 is represented as "VBUS". The power source VBUS is a 5V power source. In addition, the 5V power source can also be generated from VBAT. The sensor unit 202 is an electronic component that detects various information about the main body device 20. The sensor unit 202 includes, for example, a pressure sensor such as a microphone capacitor and a flow sensor. The sensor unit 202 outputs the detected information to the control unit 206. For example, when detecting a change in air pressure or air flow accompanying inhalation, the sensor unit 202 outputs a value indicating the inhalation of the mist performed by the user to the control unit 206. The sensor unit 202 is provided in a manner corresponding to, for example, a button or a switch used to receive an operation from the user. Here, the button includes the aforementioned power button 20B (refer to FIG. 3). In addition, the switch includes the aforementioned baffle 30 (refer to FIG. 1). When detecting the operation of the user, the sensor unit 202 outputs the detection of the operation to the control unit 206. In addition to this, the sensor unit 202 also has a temperature sensor for detecting the temperature of the heating unit 207. The temperature sensor detects the temperature of the heating unit 207, for example, based on the change in the resistance value of the conductive circuit of the heating unit 207. A voltage corresponding to the current resistance value is output from the temperature sensor. The control unit 206 calculates the temperature of the heating unit 207 from the output voltage of the temperature sensor. The calculated temperature can also be regarded as the temperature of the rod core type substrate 40 held by the holding unit 209. Other temperature sensors include a temperature sensor for detecting the temperature around the heating unit 207 and a temperature sensor for detecting the temperature near the surface of the main body device 20. The notification unit 203 is an electronic component that notifies the user of various information about the main body device 20. The notification unit 203 has, for example, an LED 20A (see FIG. 3). The lighting or flashing of the LED 20A is controlled in a mode corresponding to the content of the notification. When a plurality of LEDs 20A with different emission colors are provided, the difference in emission colors can also be combined in the lighting or flashing. For example, red can be used for notifications of the state of out-of-service or need for repair, and white, green, blue, etc. can be used for notifications of the normal usage state. The notification unit 203 may also include other devices used in conjunction with the LED 20A or used in place of the LED 20A. The other devices include a display device that displays text, images, or other information, a sound output device that outputs sound, a vibration device that vibrates the main body device 20, and the like. The light-emitting device, the display device, the sound output device, the vibration device, etc. are also examples of the "notification unit" that notifies the state of the operation of the mist generation device 1. The memory unit 204 is an electronic component that stores various information about the operation of the main body device 20. The memory unit 204 is constituted by a non-volatile semiconductor memory medium such as a flash memory, for example. The information stored in the memory unit 204 includes, for example, an OS (Operating System), FW (FirmWare), and other programs. In addition, the information stored in the memory unit 204 includes, for example, information about the control of electronic components. The information about the control is information about the user's puffing, such as the remaining amount of the secondary battery, SOH (State of Health), the number of puffs, the puffing time, and the cumulative puffing time. The communication unit 205 is a communication interface for realizing communication between the main body device 20 and other devices. The communication unit 205 communicates with other devices by following any wired or wireless communication standard. The communication standards here include, for example, wireless LAN (Local Area Network), USB, Wi-Fi (Wireless Compatibility Certification) (registered trademark), and Bluetooth (registered trademark). For example, the communication unit 205 transmits information about the user's puffing to a smart phone. In addition, the communication unit 205 downloads an update program from a server or the heating setting content that specifies the temperature change of the heating unit 207 in the heating mode. The control unit 206 functions as an arithmetic processing device or a control device, and controls the operations of the respective parts constituting the main body device 20 according to various programs. The transmission of the control signal is performed through a signal line different from the power line. For example, the communication within the main body device 20 uses serial communication methods such as I2C (=Inter-Integrated Circuit), SPI (Serial Peripheral Interface), UART (Universal Asynchronous Receiver / Transmitter), etc. The control unit 206 is implemented by, for example, electronic circuits such as a CPU (Central Processing Unit), MCU (Micro Controller Unit), MPU (Micro Processing Unit), GPU (Graphical Processing Unit), ASIC (application specific integrated circuit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor). In the control unit 206, a ROM (Read Only Memory) for storing programs or calculation parameters, etc., and a RAM (Random Access Memory) for temporarily storing parameters that change appropriately, etc., may also be included. The control unit 206 performs various processes or controls through the execution of programs. The processes or controls here include, for example, power supply by the power supply unit 201, charging of the power supply unit 201, detection of information by the sensor unit 202, notification of information using the notification unit 203, writing information to or reading information from the memory unit 204, and transmission and reception of information using the communication unit 205. In addition, the control unit 206 also controls the input of information to electronic components and the processing of information output from the electronic components, etc. The holding unit 209 is a substantially cylindrical container. In this embodiment, the space inside the holding unit 209 defined by the inner wall and the bottom surface is called the internal space 209A. The internal space 209A is substantially columnar. The holding unit 209 here corresponds to the hole exposed by the sliding of the baffle 30. In the holding portion 209, an opening 209B is provided to communicate the internal space 209A with the outside. The rod-core type substrate 40 is inserted into the internal space 209A from this opening 209B. The rod-core type substrate 40 is inserted until its front end touches the bottom 209C. Only a part of the rod-core type substrate 40 is accommodated in the internal space 209A. Hereinafter, the state in which the rod-core type substrate 40 is accommodated in the internal space 209A is referred to as holding the rod-core type substrate 40 in the internal space 209A. The holding portion 209 is formed such that the inner diameter in at least a part of its axial direction is smaller than the outer diameter of the rod-core type substrate 40. Therefore, the outer peripheral surface of the rod-core type substrate 40 inserted into the internal space 209A is pressed by the inner wall of the holding portion 209. The rod-core type substrate 40 is deformed by this pressing and is held in the internal space 209A. The holding portion 209 also has a function of defining a flow path for the air passing through the rod-core type substrate 40. The air inlet hole belonging to the air inlet flow path is arranged, for example, at the bottom 209C. In addition, the opening 209B corresponds to the air outlet hole belonging to the air outlet. In the case of this embodiment, only a part of the rod-core type substrate 40 is held by the holding portion 209, and the rest protrudes from the housing to the outside. Hereinafter, the part of the rod-core type substrate 40 held by the holding portion 209 is referred to as the substrate portion 40A, and the part protruding from the housing is referred to as the suction port portion 40B. A mist source is accommodated in at least the substrate portion 40A. The mist source is a substance that is atomized by heating to generate mist. The mist source includes, in addition to tobacco shreds, processed products obtained by forming tobacco raw materials into granular, sheet-like, or powdery forms, or other tobacco-derived substances. Furthermore, the mist source may also include substances non-derived from tobacco made from plants other than tobacco such as mint or herb. For example, the mist source may also include fragrance components such as menthol. When the main body device 20 is a medical inhaler, the mist source may also include a medicine for the patient to inhale. In addition, the mist source is not limited to solids, and may also be, for example, polyols such as glycerin and propylene glycol, or liquids such as water. At least a part of the suction port portion 40B is held by the user when tasting. When the user holds the suction port portion 40B and tastes, air flows into the internal space 209A from the air inlet hole. The flowing air passes through the internal space 209A and the substrate portion 40A and reaches the user's mouth. The air reaching the user's mouth contains the mist generated in the substrate portion 40A. The heating unit 207 is composed of a heater or other heating element. The heating unit 207 is made of any material such as metal or polyimide. The heating unit 207 is configured, for example, in a film shape and is installed on the outer peripheral surface of the holding unit 209. By the heat generated by the heating unit 207, the mist source contained in the rod core substrate 40 is heated and atomized. The atomized mist source is mixed with air or the like to generate mist. In the case of FIG. 4, the vicinity of the outer periphery of the rod core substrate 40 is heated first, and the heated range gradually moves toward the center. Therefore, the atomization of the mist source starts from the vicinity of the outer periphery of the rod core substrate 40 and gradually moves toward the center. The heating unit 207 generates heat by power supply from the power supply unit 201. When, for example, a predetermined operation of the user is detected by the sensor unit 202, power supply to the heating unit 207 is permitted. Here, the predetermined operation of the user is an operation on the baffle 30 (refer to FIG. 1) or the power button 20B (refer to FIG. 3). In addition, when the temperature of the rod core substrate 40 after being heated by the heating unit 207 reaches a predetermined temperature, it becomes available for the user to take a puff. The time change of the target temperature from the start to the end of heating is stored in the memory unit 204 as the heating setting content. The heating setting content is an example of a control program. The user's puffing of the mist is detected by a flow sensor or the like of the sensor unit 202 and stored in the memory unit 204. If a predetermined time has elapsed since the start of heating, or a predetermined operation performed by the user is detected, power supply to the heating unit 207 is stopped. The predetermined operation is, for example, the removal of the rod core substrate 40. In addition, in the example of FIG. 4, although the heating unit 207 is disposed on the outer peripheral portion of the rod core substrate 40, the heating unit 207 may also be a blade-shaped metal piece inserted into the rod core substrate 40. In addition, the atomization of the mist source can also use, for example, induction heating. In the case of this heating method, the heating unit 207 at least has an electromagnetic induction source such as a coil that generates a magnetic field. At this time, a susceptor is disposed at a position overlapping with the magnetic field generated by the electromagnetic induction source. The susceptor generates heat along with the generation of the magnetic field and heats the mist source. The susceptor may also be a metal piece built into the rod core substrate 40. When the metal piece acting as the heating unit 207 is built into the rod core substrate 40, the coil for induction heating the metal piece is disposed around the holding unit 209. In addition, a susceptor may be disposed on the outer peripheral portion of the rod core substrate 40 within the main body device 20, and a coil belonging to the electromagnetic induction source may be wound around the outer peripheral portion. The heat insulation part 208 is a component that reduces the heat transfer from the heating part 207 to the surroundings. Therefore, the heat insulation part 208 is arranged to cover at least the outer peripheral surface of the heating part 207. The heat insulation part 208 is constituted by, for example, a vacuum heat insulation material, an aerogel heat insulation material, etc. The vacuum heat insulation material is, for example, a heat insulation material that forms a high vacuum state by covering glass wool and silica (powder of silicon) with a resin film, thereby making the heat conduction by gas approach zero infinitely. <Configuration of the electronic circuit> FIG. 5 is a schematic diagram showing the electronic circuit used in Embodiment 1. In FIG. 5, the connection relationship between representative parts is described. In addition, in FIG. 5, the wiring used for power supply (hereinafter referred to as "power line") is shown by a thick line, and the wiring used for control (hereinafter referred to as "control line") is shown by a thin line. The electronic circuit shown in FIG. 5 is constituted by a charging IC 211, a buck-boost DC / DC circuit 212, an MCU 213, a boost DC / DC circuit 214, a heater switch 215, a heater unit 216, a load switch 217, a voltage dividing circuit 218, and an LED 20A. The charging IC 211 performs the switching of the power supply path. For example, when a USB cable is connected to the USB connector 21 (refer to FIG. 2), the charging IC 211 connects the power supply VBUS to the buck-boost DC / DC circuit 212 and the boost DC / DC circuit 214. In contrast, when the USB cable is not connected to the USB connector 21, the charging IC 211 connects the power supply VBAT to the buck-boost DC / DC circuit 212. In addition, the MCU 213 detects whether the USB cable is connected and instructs the charging IC 211 to switch the power path through a control line (not shown). When the LED 20A is lit in a state where the USB cable is not connected, the charging IC 211 generates a 5V power supply by OTG (On-The-Go) and applies it to the power line for the LED 20A. The buck-boost DC / DC circuit 212 is a circuit that converts the power supply VBUS or the power supply VBAT supplied from the charging IC 211 into a system power supply Vsys of a certain voltage. In the case of this embodiment, the system power supply Vsys is 3.3V. In the case of FIG. 5, the system power supply Vsys is supplied to the MCU 213 and the voltage dividing circuit 218. The system power supply Vsys here is an example of the first power supply that supplies power to the MCU 213. In addition, the aforementioned 5V power supply (or the power supply VBUS) is an example of the second power supply. For example, when the power supply VBAT is supplied, the buck-boost DC / DC circuit 212 boosts or buck-boosts the power supply VBAT to generate the system power supply Vsys. Although the power supply VBAT varies with the remaining capacity or degree of deterioration of the secondary battery, it is converted into a constant voltage by the buck-boost DC / DC circuit 212. On the other hand, when the power supply VBUS is supplied, the buck-boost DC / DC circuit 212 buck-boosts the power supply VBUS to generate the system power supply Vsys. The MCU 213 is an example of the control unit 206 (refer to FIG. 4) that controls the operations of the respective components constituting the mist generating device 1 (refer to FIG. 1), and operates with the system power supply Vsys. For example, the MCU 213 controls the lighting and extinguishing of the LED 20A. In the case of FIG. 5, the MCU 213 controls the lighting and extinguishing of the LED 20A through the on / off control of the field effect transistor (FET: Field Effect Transistor) 213A belonging to the switching element. In other words, the FET 213A is an example of the control element that opens and closes the electrical connection of the LED 20A. In addition, the FET 213A is connected in series to the wiring that connects the LED 20A to the ground (GND). The MCU 213 controls the FET 213A to be in the conduction state or the cutoff state by switching the voltage applied to the gate terminal (so-called control terminal) of the FET 213A. In FIG. 5, the gate voltage Vg applied to the gate terminal is referred to as the control signal. When the gate voltage Vg is higher than the gate threshold voltage Vth, the FET 213A becomes in the conduction state and the LED 20A lights up. On the other hand, when the gate voltage Vg is lower than the gate threshold voltage Vth, the FET 213A becomes in the disconnected state and the LED 20A goes out. The gate threshold voltage Vth of the FET 213A shown in FIG. 5 is approximately 1 V or less. Here, the gate threshold voltage Vth is lower than the operation lower limit voltage that guarantees the normal operation of the MCU 213. In other words, the operation lower limit voltage of the MCU 213 is higher than the gate threshold voltage Vth of the FET 213A. Therefore, during the period when the MCU 213 does not control the operation of the FET 213A, it is possible that the FET 213A unexpectedly becomes in the conduction state. In the case of Embodiment 1, eight FETs 213A are prepared for the eight LEDs 20A. One LED 20A and one FET 213A form a series circuit. Therefore, the eight series circuits are connected in parallel to the 5V power supply. The lighting and extinguishing of each LED 20A are individually controlled by the FET 213A. In addition, in the electronic circuit shown in FIG. 5, although the FET 213A is built into the MCU 213, the FET 213A can also be provided outside the MCU 213. The boost DC / DC circuit 214 is a circuit that converts the power supply VBAT supplied from a secondary battery (not shown) into a boosted power supply Vboost of a certain voltage. The boosted power supply Vboost is a power supply whose potential is higher than the system power supply. For example, it is 5V. The boosted power supply Vboost is an example of a third power supply different from the 5V power supply. In the case of Embodiment 1, for the purpose of distributing the load, the 5V power supply and the boosted power supply Vboost are made into different wirings. The heater switch (SW) 215 controls the application of the boosted power supply Vboost to the heater unit 216. The heater switch 215 is a switching element connected in series to the power supply line connecting the boost DC / DC circuit 214 and the heater unit 216. In the case of FIG. 5, the heater switch 215 is composed of a field effect transistor. The opening and closing of the heater switch 215 as a switching element is controlled by the MCU 213. When the heater switch 215 is in the ON state, the boosted power supply Vboost is supplied to the heater unit 216. On the other hand, when the heater switch 215 is in the OFF state, the boosted power supply Vboost is not supplied to the heater unit 216. By controlling the supply of the boosted power supply Vboost, the temperature of the heater unit 216 changes according to the pre-specified heating setting content. In addition, the opening and closing control of the heater switch 215 can also be started by detecting a predetermined user input, such as the input of the power button 20B (refer to FIG. 3). The heater switch 215 is an example of a second control element. The heater unit 216 is a component that generates heat by being energized and heats the rod-shaped substrate 40 inserted into the holding portion 209. The heater unit 216 is an example of the heating portion 207. The temperature of the heater unit 216 can be calculated based on the potential difference that appears between both ends of the heater unit 216 (that is, between the power supply side and the ground side). Incidentally, the calculation of the temperature based on the measured potential difference is performed by the MCU 213. The load switch 217 is a switch that controls the supply of the 5V power supply to the LED 20A. In the case of FIG. 5, the 5V power supply is applied to the VIN terminal of the load switch 217, and the potential obtained by dividing the system power supply Vsys (3.3V in FIG. 5) is applied to the enable terminal EN. In addition, a voltage dividing circuit 218 is used for the voltage division of the system power supply Vsys. The voltage dividing circuit 218 shown in FIG. 5 is constituted by a series circuit of resistors R1 and R2, and the connection midpoint of resistor R1 and resistor R2 is connected to the enable terminal EN of the load switch 217. Incidentally, the resistance value of resistor R1 is preferably set to a value larger than the resistance value of resistor R2. For example, the resistance value of resistor R1 is set to 500 kΩ, and the resistance value of resistor R2 is set to 300 kΩ. In the case of this numerical example, a voltage approximately 40% of the system power supply Vsys is applied to the enable terminal EN. For example, when the reset operation is executed, the system power supply Vsys output from the buck-boost DC / DC circuit 212 gradually decreases and soon becomes 0V. At this time, the voltage dividing circuit 218 then performs the task of making the potential applied to the enable terminal EN lower than the potential of the system power supply Vsys. By setting the resistance value of resistor R1 to a value larger than the resistance value of resistor R2, compared with the case where it is set to a value smaller than the resistance value of resistor R2, the difference between the potential applied to the enable terminal EN and the operation lower limit voltage of the MCU 213 can be set larger. For example, at the time point when the system power supply Vsys drops to 2.5V, 1V is output from the voltage dividing circuit 218, and at the time point when the system power supply Vsys drops to 2V, 0.8V is output from the voltage dividing circuit 218. Thus, the output voltage of the voltage dividing circuit 218 can be lower than the actual system power supply Vsys. Therefore, using the output of this voltage dividing circuit 218 for the load switch 217 of the enable signal can stop the supply of the 5V power supply to the LED 20A at an earlier time point compared with the case of using the system power supply Vsys for the enable signal. Thus, the load switch 217 that controls the supply of power to the LED 20A is an example of the first switch. FIG. 6 is a circuit diagram illustrating an internal configuration example of the load switch 217 used in Embodiment 1. The load switch 217 shown in FIG. 6 has an N-channel FET 217A connected in series with respect to the 5V power supply. In the case of FIG. 6, a 5V power supply is applied to the drain terminal D of the FET 217A through the VIN terminal. In addition, the source terminal S of the FET 217A is connected to the anode terminal of the LED 20A through the VOUT terminal. In addition, an enable signal is applied to the gate terminal G of the FET 217A through the enable terminal EN. The gate threshold voltage Vth of FET 217A is designed to be higher than the lower operating voltage of MCU 213, and lower than the potential of the enable signal when the system power supply Vsys is applied in the normal state (here it is 3.3V×(R2 / (R1+R2))). The following is to call this size relationship "Relationship 1". In addition, the normal state means the state where the system power supply Vsys is stably supplied, and it is a state that does not include transitional states such as the startup or shutdown of the system power supply Vsys. In addition, since the lower operating voltage of MCU 213 is defined as a characteristic of MCU 213, the gate threshold voltage Vth of FET 217A and the resistance values of resistors R1 and R2 are designed to satisfy Relationship 1. By satisfying Relationship 1, FET 217A of load switch 217 maintains the conducting state during normal operation, and in the situation where the potential of the system power supply Vsys decreases during, for example, a reset operation, it switches from conducting to non-conducting at a potential higher than the lower operating voltage of MCU 213. In other words, during normal operation when the potential of the enable signal is higher than the gate threshold voltage Vth, FET 217A conducts and outputs a 5V power supply to the VOUT terminal. On the other hand, during reset, while the system power supply Vsys is still higher than the lower operating voltage of MCU 213, the potential of the enable signal drops below the gate threshold voltage Vth, and FET 217A switches from conducting to non-conducting. As a result, even if a 5V power supply is applied to the VIN terminal, the 5V power supply will no longer appear at the VOUT terminal of load switch 217. In other words, the power required for the operation of LED 20A will no longer be supplied to LED 20A. As a result, even if FET 213A that controls the lighting and extinguishing of LED 20A unexpectedly becomes conducting, LED 20A will not light up. <Other structural features> In addition, in the case of this embodiment, there is no load switch 217 for LED 20A on the wiring to which the boosted power supply Vboost is applied to supply power to the heater unit 216. Therefore, when the gate threshold voltage Vth of heater switch 215 is lower than the lower operating voltage of MCU 213, it is possible that heater switch 215 unexpectedly conducts during the period when MCU 213 cannot control. However, even if heater switch 215 unexpectedly conducts during the reset period, this period is about 0.4 seconds. Therefore, even due to unexpected power supply, the temperature rise of heater unit 216 is limited and will not affect the use of the user. In addition, unlike the LED 20A, the occurrence of unexpected power supply to the heater unit 216 cannot be detected by the user. Therefore, it does not affect the user's actions like the light emission of the LED 20A. In addition, for achieving high heating efficiency, it is better that there are fewer resistive elements on the wiring to which the boost power supply Vboost is applied. Therefore, in Embodiment 1, no load switch is provided on the wiring to which the boost power supply Vboost is applied. <Measures against unexpected lighting of the LED during the reset operation> FIG. 7 is a diagram illustrating the power supply to the LED 20A when the reset operation is performed by the electronic circuit used in Embodiment 1. First, when a reset operation is detected, the supply of the system power Vsys output from the buck-boost DC / DC circuit 212 to the MCU 213 etc. is stopped. The stop of this supply is performed by a load switch (not shown). Incidentally, the off control of the load switch (not shown) is performed by a power driver. The power driver, for example, turns off the load switch when it detects the pressing of the power button 20B in a state where the front panel 10 is removed from the main body device 20. The power driver operates independently of the MCU 213. With the detection of the reset operation, the waveform 301 of the system power Vsys supplied to the MCU 213 and the voltage dividing circuit 218 starts to decrease from 3.3V. In addition, the waveform 302 of the enable signal output from the voltage dividing circuit 218 starts to decrease from a voltage lower than 3.3V. As a result, before the system power Vsys supplied to the MCU 213 decreases to the operation lower limit voltage, the potential of the enable signal decreases below the gate threshold voltage Vth of the FET 217A in the load switch 217. Therefore, as shown by the waveform 303, the FET 217A in the load switch 217 turns off before the system power Vsys supplied to the MCU 213 decreases to the operation lower limit voltage. That is, the FET 217A switches from the on state to the off state earlier than the start of the uncontrollable period of the MCU 213. In addition, after the end of the uncontrollable period of the MCU 213, the FET 217A switches from the off state to the on state. As a result, even if the 5V power supply (waveform 304) continues to be supplied, at the start of the uncontrollable period, the potential applied to the anode terminal of the LED 20A (hereinafter referred to as "anode potential") decreases to around 0V as shown by the waveform 305. Therefore, even if the FET 213A is turned on for some reason during the uncontrollable period of the MCU 213 (the pulse of waveform 306), the anode potential of the LED 20A will also be insufficient for the potential required for light emission. Therefore, as shown in waveform 307, the LED 20A will not emit light. In other words, it is possible to prevent the unexpected light emission of the LED 20A not in accordance with the control of the MCU 213 (i.e., not as expected). <Comparative Example> FIG. 8 is a diagram for explaining the power supply to the LED 20A when a reset operation is performed by an electronic circuit not provided with the load switch 217. FIG. 8 shows the corresponding parts to those in FIG. 7 with corresponding symbols attached. In the case of FIG. 8, since the load switch 217 is not provided, even if the potential of the system power supply Vsys (waveform 301) supplied to the MCU 213 becomes below the operating lower limit voltage of the MCU 213 along with the reset operation, the supply of the 5V power supply (waveform 305) to the anode terminal of the LED 20A continues. As a result, when the FET 213A is turned on for some reason during the uncontrollable period of the MCU 213 (the pulse of waveform 306), the light emission conditions will be met, and the LED 20A will emit light as shown in waveform 307. The light emission of this LED 20A may be accepted by the user as a hint for some information, so it is not ideal. <Effect> In the atomizing device 1 (refer to FIG. 1) of the present embodiment, a structure is adopted in which a load switch 217 is provided on the power supply line for supplying power to the LED 20A (refer to FIG. 1), and the supply of power during the period when the potential of the system power supply Vsys drops below the operating lower limit voltage of the MCU 213 (refer to FIG. 5) is stopped. Specifically, the system power supply Vsys supplied to the MCU 213 is used as an enable signal, and during the uncontrollable period of the MCU 213 (refer to FIG. 5), it is controlled so that the operating power is not supplied to the LED 20A. As a result, during the period when the system power supply Vsys supplied to the MCU 213 (refer to FIG. 5) becomes below the operating lower limit voltage, even if the FET 213A becomes conductive for some reason, it is possible to prevent the unexpected light emission of the LED 20A (refer to FIG. 5). In other words, during the uncontrollable period of the control unit 206 (refer to FIG. 4), it is possible to prevent the unexpected operation of the notification unit 203 (refer to FIG. 4). In addition, in the atomizing device 1 of this embodiment, the system power supply Vsys is divided by the voltage dividing circuit 218, and the divided potential is provided to the load switch 217 as an enabling signal. Therefore, the load switch 217 can be switched to the off state before the system power supply Vsys accompanying the reset drops to the operating lower limit voltage of the MCU 213. That is, it is possible to stop the supply of the operating power to the LED 20A earlier before the system power supply Vsys drops. <Embodiment 2> In this embodiment, other electronic circuits applicable to the atomizing device 1 (refer to FIG. 1) will be described. In addition, the external configuration or functional configuration of the atomizing device 1 is the same as that of Embodiment 1. FIG. 9 is a schematic diagram showing the electronic circuit used in Embodiment 2. FIG. 9 shows the corresponding parts to those in FIG. 5 with corresponding symbols attached. The electronic circuit shown in FIG. 9 supplies the system power supply Vsys supplied to the MCU 213 to the load switch 217, which is different from Embodiment 1. FIG. 10 is a circuit diagram illustrating an internal configuration example of the load switch 217 used in Embodiment 2. In FIG. 10, the corresponding parts to those in FIG. 6 are shown with corresponding symbols attached. In the case of the load switch 217 shown in FIG. 10, the conditions required for the gate threshold voltage Vth of the FET 217B that switches the supply of the 5V power supply to the LED 20A are different from those of the FET 217A described in FIG. 6. In the case of FIG. 10, the maximum value of the potential applied to the enable terminal EN becomes the same 3.3V as the system power supply Vsys. Therefore, the gate threshold voltage Vth of the FET 217B is designed to be higher than the operating lower limit voltage of the MCU 213 and lower than the potential of the enabling signal when the system power supply Vsys is applied in the normal state (here it is 3.3V). The following size relationship is referred to as "Relationship 2". In addition, since the operating lower limit voltage of the MCU 213 is defined as a characteristic of the MCU 213, the gate threshold voltage Vth of the FET 217B is designed to satisfy Relationship 2. <Measures against unexpected lighting of the LED during the reset operation> FIG. 11 is a diagram illustrating the power supply to the LED 20A when the reset operation is performed by the electronic circuit used in Embodiment 2. In FIG. 11, the corresponding parts to those in FIG. 7 are shown with corresponding symbols attached. In FIG. 11, the system power supply Vsys is consistent with the enable signal, which is different from FIG. 7. Therefore, the waveform 302 described in FIG. 7 is not depicted in FIG. 11. As described above, the gate threshold voltage Vth of the FET 217B is designed to be the intermediate potential between 3.3V and the lower limit operating voltage of the MCU 213. Therefore, at the time when the system power supply Vsys drops below the gate threshold voltage Vth of the FET 217B along with the reset operation, the FET 217B switches from the conducting state to the off state (waveform 303). From this time point, the decrease in the potential (waveform 305) applied to the anode terminal of the LED 20A starts. As a result, until the system power supply Vsys drops to the lower limit operating voltage of the MCU 213, the anode potential of the LED 20A decreases to around 0V. Therefore, even if the FET 213A conducts for some reason during the uncontrollable period of the MCU 213 (the pulse of waveform 306), the anode potential of the LED 20A is also insufficient for the potential required for light emission. Therefore, as shown in waveform 307, the LED 20A does not light up. In other words, it is possible to prevent the unexpected lighting of the LED 20A that is not in accordance with the control of the MCU 213 (i.e., not as expected). <Effect> In the case of the atomizing device 1 of this embodiment, a load switch 217 is also provided on the power supply line for supplying power to the LED 20A (refer to FIG. 1), and the power supply is stopped during the period when the potential of the system power supply Vsys drops below the lower limit operating voltage of the MCU 213 (refer to FIG. 5). As a result, during the period when the system power supply Vsys supplied to the MCU 213 (refer to FIG. 5) becomes below the lower limit operating voltage, even if the FET 213A becomes conductive for some reason, it is possible to prevent the unexpected lighting of the LED 20A (refer to FIG. 5). In other words, during the uncontrollable period of the control unit 206 (refer to FIG. 4), it is possible to prevent the unexpected operation of the notification unit 203 (refer to FIG. 4). <Embodiment 3> In this embodiment, other electronic circuits applicable to the atomizing device 1 (refer to FIG. 1) will be described. In addition, the external configuration or functional configuration of the atomizing device 1 is the same as that of Embodiment 1. FIG. 12 is a schematic diagram showing the electronic circuit used in Embodiment 3. In FIG. 12, corresponding symbols are attached to the corresponding parts of FIG. 5 for display. The electronic circuit shown in Fig. 12 is different from Embodiment 1 in that it does not have a boost DC / DC circuit 214 (refer to Fig. 5), and the power supply VBUS is supplied to the heater unit 216 via the heater switch 215. In the case of Fig. 12, the wiring for supplying the 5V power supply (or the power supply VBUS) is branched into two. One is connected to the load switch 217, and the other is connected to the heater switch 215. Therefore, the 5V power supply (or the power supply VBUS) supplied to the load switch 217 and the 5V power supply (or the power supply VBUS) supplied to the heater switch 215 are both examples of the second power supply. <Other Structural Features> In addition, in the case of this embodiment, there is no load switch 217 for the LED 20A on the wiring to which the boosted power supply Vboost is applied to supply power to the heater unit 216. Therefore, when the gate threshold voltage Vth of the heater switch 215 is lower than the lower limit operating voltage of the MCU 213, the heater switch 215 may unexpectedly conduct during the uncontrollable period of the MCU 213. However, even if the heater switch 215 unexpectedly conducts during the reset period, this period is about 0.4 seconds. Therefore, even due to the unexpected power supply, the temperature rise of the heater unit 216 is limited and will not affect the use by the user. In addition, different from the LED 20A, the occurrence of unexpected power supply to the heater unit 216 is not noticed by the user. Therefore, it will not affect the user's actions like the lighting of the LED 20A. In addition, for achieving high heating efficiency, it is better that there are fewer resistance elements on the wiring to which the boosted power supply Vboost is applied. Considering the reasons from this perspective, in Embodiment 1, there is no load switch on the wiring to which the boosted power supply Vboost is applied. <Effects> In the case of the mist generating device 1 (refer to Fig. 1) of this embodiment, a structure is also adopted in which a load switch 217 is provided on the power supply line for supplying power to the LED 20A (refer to Fig. 1), and the power supply is stopped during the period when the potential of the system power supply Vsys drops below the lower limit operating voltage of the MCU 213 (refer to Fig. 5). As a result, during the period when the system power supply Vsys supplied to the MCU 213 (see FIG. 5) becomes equal to or lower than the operation lower limit voltage, even if the FET 213A becomes conductive for some reason, unexpected lighting of the LED 20A (see FIG. 5) can be prevented. In other words, during the uncontrollable period of the control unit 206 (see FIG. 4), unexpected operation of the notification unit 203 (see FIG. 4) can be prevented. In addition, in the present embodiment, similar to the first embodiment, the system power supply Vsys is divided by the voltage dividing circuit 218, and the divided potential is supplied to the enable terminal EN of the load switch 217, so that the supply of the operation power supply to the LED 20A can be stopped earlier before the system power supply Vsys decreases. In addition, in the case of the present embodiment, a circuit configuration without the voltage dividing circuit 218 can be used in the same manner as the second embodiment. <Other Embodiments> (1) Although the embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the foregoing embodiments. It should be understood from the description of the claims that various changes or improvements made to the foregoing embodiments are also included in the technical scope of the present invention. (2) In the foregoing embodiments, although the case of using the load switch 217 to prevent unexpected lighting of the LED 20A has been described, the load switch 217 can also be used to prevent unexpected operation of a display device, a sound output device, or a vibration device. In addition, the object to which the load switch 217 is provided can be all or part of the LED 20A or other light emitting devices, display devices, sound output devices, or vibration devices. (3) In the foregoing embodiments, although the example of using the system power supply Vsys or the voltage obtained by dividing the system power supply Vsys as the enable signal has been described, the supply of the 5V power supply to the LED 20A by the load switch 217 can also be controlled by other circuit configurations. For example, the system power supply Vsys or the system power supply Vsys can be compared with a reference voltage, and the FET 217A in the load switch 217 can be switched by the output of the H level and the output of the L level belonging to the comparison result. (4) In the foregoing embodiments, although the case where the mist source is solid has been described, the mist source can also be liquid. When the mist source is liquid, the capillary phenomenon is used to guide the mist source into a thin tube called a wick, and the coil wound around the wick is heated to evaporate the mist source. In addition, when the mist source is liquid, the heating of the mist source is linked to the user's sucking. That is, when the sensor unit 202 (refer to FIG. 4) detects the user's puffing, the vapor source of the liquid is heated immediately. However, an upper limit (e.g., 2.5 seconds) is set for the heating time length of one puffing. Even if the puffing continues beyond the upper limit, the heating of the vapor source is stopped at the moment the upper limit is reached. In addition, for the amount of power required for heating, the vapor source of the liquid requires less power than the solid vapor source. Therefore, in the case of the liquid vapor source, it is easier to adopt the electronic circuit described in Embodiment 3 than in the case of the solid vapor source. (5) In the foregoing embodiments, a vapor generating device that heats a solid vapor source to generate vapor has been described. However, it may also be a vapor generating device that separately heats a solid vapor source and a liquid vapor source to generate vapor. Such a vapor generating device is also referred to as a composite vapor generating device. <Summary> In addition, the present disclosure includes the following configurations. (1) A vapor generating device, comprising: a heating unit that heats a vapor source; a notification unit that notifies a user of information regarding the heating of the vapor source; a control unit that controls the operation of the notification unit; a control element that is controlled by the control unit and opens and closes the electrical connection of the notification unit; a first power source that supplies power to the control unit; a second power source that supplies power to the notification unit; and a first switch that uses the power supplied from the first power source for an enabling signal and controls the power supply from the second power source to the notification unit. (2) The vapor generating device according to (1), wherein the notification unit includes a light-emitting element. (3) The vapor generating device according to (1) or (2), further comprising a voltage-dividing circuit that divides the voltage of the first power source, and uses the voltage divided by the voltage-dividing circuit as the enabling signal. (4) The vapor generating device according to any one of (1) to (3), wherein the first switch is configured to turn off the enabling signal at a voltage higher than the lower limit operating voltage of the control unit. (5) The vapor generating device according to any one of (1) to (4), wherein the threshold voltage of the control element is lower than the lower limit operating voltage of the control unit. (6) The vapor generating device according to any one of (1) to (5) is provided with a third power source different from the second power source that supplies power to the heating unit. (7) The vapor generating device according to (6), wherein the power supply from the third power source to the heating unit is controlled by a second control element, and between the third power source and the heating unit, there is no switch that uses the power supplied from the first power source for an enabling signal and controls the power supply from the third power source to the heating unit. (8) The atomizing device according to any one of (1) to (5), wherein the heating unit is supplied with power from a second power source. (9) The atomizing device according to (8), between the second power source and the heating unit, does not include a switch that uses the power supplied from the first power source for an enabling signal and controls the power supply from the second power source to the heating unit. (10) The atomizing device according to (6) or (8), wherein the atomizing source is a solid. (11) The atomizing device according to (6) or (8), wherein the atomizing source is a liquid. 20: Body device 20A: LED 211: Charging IC 212: Buck-boost DC / DC circuit 213: MCU 213A: FET 214: Boost DC / DC circuit 215: Heater switch 216: Heater unit 217: Load switch 218: Voltage dividing circuit

Claims

1. A fog generating device comprising: a heating unit for heating a fog source; a notification unit for notifying a user of information regarding the heating of the fog source; a control unit for controlling the operation of the notification unit; a control element controlled by the control unit and opening / closing the electrical connection of the notification unit; a first power source for supplying power to the control unit; a second power source for supplying power to the notification unit; and a first switch for using the power supplied from the first power source as an enable signal and controlling the power supply from the second power source to the notification unit.

2. The fog generating apparatus as described in claim 1, wherein, The aforementioned notification unit includes a light-emitting element.

3. The fog generating apparatus as described in claim 1 or 2 further comprises a voltage divider circuit that divides the aforementioned first power supply, and uses the voltage after being divided by the aforementioned voltage divider circuit as the aforementioned enable signal.

4. The fog generating apparatus as described in claim 1 or 2, wherein, The aforementioned first open relationship is configured such that the aforementioned enable signal is turned off at a voltage higher than the lower limit voltage of the aforementioned control unit.

5. The fog generating apparatus as described in claim 1 or 2, wherein, The threshold voltage of the aforementioned control element is lower than the lower operating limit voltage of the aforementioned control unit.

6. The fog generating device as described in claim 1 is equipped with a third power source, different from the second power source, that supplies power to the aforementioned heating unit.

7. The fog generating apparatus as described in claim 6, wherein, The power supply from the aforementioned third power source to the aforementioned heating element is controlled by a second control element. There is no switch between the aforementioned third power source and the aforementioned heating element where the power supplied from the aforementioned first power source is used as an enable signal to control the power supply from the aforementioned third power source to the aforementioned heating element.

8. The fog generating apparatus as described in claim 1 or 2, wherein, The aforementioned heating element is powered by the aforementioned second power source.

9. The fog generating apparatus as described in claim 8, wherein the second power source and the heating unit are not connected by a switch that uses the power supplied from the first power source to enable a signal to control the power supply from the second power source to the heating unit.

10. The fog generating apparatus as described in claim 6, wherein, The aforementioned fog source is a solid.

11. The fog generating apparatus as described in claim 6, wherein, The aforementioned fog source is a liquid.

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