Smart hood device driving a ventilation fan based on smoke detection and temperature detection and its control method

Abstract

A hood device and a method for controlling the same are disclosed. The control method according to the present disclosure includes the steps of: identifying a concentration of mist based on sensing information obtained through a mist detection sensor; controlling a driving unit of a ventilation fan of the hood device to rotate at a first rotational speed per unit time when the identified concentration is greater than or equal to a preset value; and controlling a driving unit of a ventilation fan of the hood device to rotate at a second rotational speed per unit time when the identified concentration is less than a preset value, wherein the first rotational speed may be a value greater than the second rotational speed.

Description

Technology Field

[0001] The present disclosure relates to a smart hood device, and more specifically, to a smart hood device that drives a ventilation fan based on fog detection and temperature detection, and a method for controlling the same. Background Technology

[0002] With the advancement of wireless communication technology and the development of various types of sensors, they are being utilized for the control of various devices. For example, air conditioning units are controlled via remote wireless communication based on temperature information obtained from a temperature sensor, or indoor brightness is controlled via remote wireless communication based on brightness information obtained from a brightness sensor.

[0003] Such sensing information-based feedback control systems are widely utilized in the field of the Internet of Things (IoT), and are a technology receiving particular attention in the areas of remote control and smart control for home appliances.

[0004] Furthermore, recently, artificial intelligence models, such as speech recognition models and image classification models, are being combined to expand the applicability of remote device control using the Internet of Things, and accuracy is improving due to the continuous accumulation of data. The problem to be solved

[0005] When performing cooking operations involving heating using cooking devices, ranges, etc., excessive steam, smoke, or mist may be generated during the cooking process.

[0006] Excessive steam, smoke, and haze generated during the cooking process may obstruct the cook's view, making smooth cooking difficult, and may cause discomfort due to strong cooking odors.

[0007] Therefore, there is a need to explore methods to efficiently remove steam, smoke, and mist that may be generated during the cooking process by detecting them in real time.

[0008] The purposes of the present disclosure are not limited to those mentioned above, and other purposes and advantages of the present disclosure not mentioned may be understood from the following description and will be more clearly understood from the embodiments of the present disclosure. Furthermore, it will be readily apparent that the purposes and advantages of the present disclosure can be realized by the means and combinations thereof set forth in the claims. means of solving the problem

[0009] A control method for a hood device according to the present embodiment comprises: a step of identifying a concentration of mist based on sensing information obtained through a mist detection sensor; a step of controlling a driving unit of a ventilation fan of the hood device to rotate at a first rotational speed per unit time if the identified concentration is greater than or equal to a preset value; and a step of controlling a driving unit of a ventilation fan of the hood device to rotate at a second rotational speed per unit time if the identified concentration is less than a preset value; wherein the first rotational speed may be a value greater than the second rotational speed.

[0010] The fog detection sensor is an infrared detection sensor, and the control method may include the step of controlling a light irradiation unit to irradiate infrared rays in a preset direction; and the step of obtaining sensing information by sensing infrared rays reflected from an object through the infrared detection sensor.

[0011] The above control method may include the step of acquiring an image of an area within a preset range from the air intake of the hood device through a camera; and the step of identifying the concentration of the mist based on the output value by inputting the acquired image into a mist identification model.

[0012] Meanwhile, the above control method can control the driving unit of the ventilation fan to increase the rotational speed of the ventilation fan per unit time as the identified concentration is higher, and control the driving unit of the ventilation fan to decrease the rotational speed of the ventilation fan per unit time as the identified concentration is lower.

[0013] Meanwhile, the above control method may include: a step of identifying the temperature of a point located within a preset range from the air intake of the hood device based on sensing information obtained through a temperature sensor; a step of controlling the driving unit of the ventilation fan of the hood device to rotate at a first rotational speed per unit time if the identified temperature is greater than or equal to a preset value; and a step of controlling the driving unit of the ventilation fan of the hood device to rotate at a second rotational speed per unit time if the identified temperature is less than a preset value.

[0014] The above control method can control the driving unit of the ventilation fan to increase the rotational speed per unit time of the ventilation fan as the identified temperature is higher, and control the driving unit of the ventilation fan to decrease the rotational speed per unit time of the ventilation fan as the identified temperature is lower.

[0015] The above control method may include the step of transmitting an emergency notification signal to a user terminal through a communication interface when the rotational speed per unit time of the ventilation fan is maintained at or above a first threshold value for or longer than a preset time.

[0016] Meanwhile, the above control method may include the step of transmitting a fire risk signal to a server through a communication interface when the rotational speed per unit time of the ventilation fan is maintained at or above a second threshold value for a preset time.

[0017] The above control method may include the step of controlling a driving unit of a ventilation fan to rotate the ventilation fan based on the control command information when control command information of the ventilation fan is received from a user terminal through the communication interface.

[0018] At least one instruction may be stored that is executed by a processor of a hood device according to one embodiment of the present disclosure, so that the hood device performs the control method of claim 1. Effects of the invention

[0019] By controlling the rotational speed per unit of time of the ventilation fan included in the hood device based on a fog detection sensor and a temperature sensor, steam, smoke, and fog that may be generated during the cooking process can be detected in real time and efficiently removed. Brief explanation of the drawing

[0020] Aspects, features, and advantages of specific embodiments of the present disclosure will become more apparent from the following description with reference to the accompanying drawings. FIG. 1 is a block diagram illustrating the configuration of a hood device according to one embodiment of the present disclosure. FIG. 2 is a perspective view and a partial enlarged view illustrating a hood device according to one embodiment of the present disclosure. FIG. 3 is a flowchart illustrating the operation of a hood device controlling a ventilation fan based on sensing information obtained through a fog detection sensor according to one embodiment of the present disclosure. FIG. 4 is a flowchart illustrating the operation of a hood device controlling a ventilation fan based on sensing information obtained through a temperature sensor according to one embodiment of the present disclosure. Specific details for implementing the invention

[0021] The embodiments described herein are subject to various modifications and may have various forms; specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the scope of specific embodiments and should be understood to include various modifications, equivalents, and / or alternatives of the embodiments of the present disclosure. In relation to the description of the drawings, similar reference numerals may be used for similar components.

[0022] In describing the present disclosure, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the present disclosure, such detailed description is omitted.

[0023] Additionally, the following embodiments may be modified in various other forms, and the scope of the technical concept of the present disclosure is not limited to the following embodiments. Rather, these embodiments are provided to make the present disclosure more faithful and complete and to fully convey the technical concept of the present disclosure to those skilled in the art.

[0024] The terms used in this disclosure are used merely to describe specific embodiments and are not intended to limit the scope of the rights. The singular expression includes the plural expression unless the context clearly indicates otherwise.

[0025] In the present disclosure, expressions such as “have,” “may have,” “include,” or “may include” indicate the presence of such features (e.g., numerical values, functions, actions, or components such as parts) and do not exclude the presence of additional features.

[0026] In the present disclosure, expressions such as “A or B,” “at least one of A or / and B,” or “one or more of A or / and B” may include all possible combinations of items listed together. For example, “A or B,” “at least one of A and B,” or “at least one of A or B” may refer to cases including (1) at least one A, (2) at least one B, or (3) both at least one A and at least one B.

[0027] Expressions such as "first," "second," "first," or "second" used in this disclosure may modify various components regardless of order and / or importance, and are used only to distinguish one component from another and do not limit said components.

[0028] Where it is stated that a component (e.g., Component 1) is "(operatively or communicatively) coupled with / to" or "connected to" another component (e.g., Component 2), it should be understood that the component may be directly connected to the other component or connected through the other component (e.g., Component 3).

[0029] On the other hand, when it is stated that a certain component (e.g., a first component) is "directly connected" or "directly coupled" to another component (e.g., a second component), it may be understood that no other component (e.g., a third component) exists between the certain component and the other component.

[0030] As used in this disclosure, the expression “configured to” may be replaced, depending on the context, with, for example, “suitable for,” “having the capacity to,” “designed to,” “adapted to,” “made to,” or “capable of.” The term “configured to” may not necessarily mean only “specifically designed to” in hardware.

[0031] Instead, in some situations, the expression “device configured to do something” may mean that the device is “capable of doing something” together with other devices or components. For example, the phrase “processor configured (or set) to perform A, B, and C” may mean a dedicated processor for performing those operations (e.g., an embedded processor), or a generic-purpose processor (e.g., a CPU or application processor) capable of performing those operations by executing one or more software programs stored in a memory device.

[0032] In the embodiments, a 'module' or 'part' performs at least one function or operation and may be implemented in hardware or software, or a combination of hardware and software. Additionally, a plurality of 'modules' or a plurality of 'parts' may be integrated into at least one module and implemented by at least one processor, except for the 'module' or 'part' that needs to be implemented in specific hardware.

[0033] Meanwhile, the various elements and areas in the drawings are depicted schematically. Accordingly, the technical concept of the present invention is not limited by the relative sizes or spacing depicted in the attached drawings.

[0034] Hereinafter, embodiments according to the present disclosure are described in detail with reference to the attached drawings so that those skilled in the art can easily implement them.

[0035] A hood device may be an electronic device capable of sucking in smoke, smoke, and steam generated during the cooking process and exhausting them outside the cooking space.

[0036] The hood device may include a ventilation fan, and by controlling the drive unit of the ventilation fan, the fan can rotate to suck in smoke generated during the cooking process and discharge it to the outside.

[0037] FIG. 1 is a block diagram illustrating the configuration of a hood device according to one embodiment of the present disclosure.

[0038] Referring to FIG. 1, the hood device (100) may include a fog detection sensor (110), a temperature sensor (120), a ventilation fan, a driving unit (130) of the ventilation fan, a communication interface (140), a memory (150), and a processor (160).

[0039] However, it is not limited to this, and the hood device (100) may include additional configurations other than this or omit some configurations.

[0040] FIG. 2 is a perspective view and a partial enlarged view illustrating a hood device (100) according to one embodiment of the present disclosure.

[0041] Referring to FIG. 2, the air intake of the hood device (100) can be positioned at a predetermined distance from the upper surface of the cooking device (10), such as an induction cooker, gas range, stove, fryer, etc.

[0042] Additionally, a fog detection sensor (110) or a temperature sensor (120) may be placed in an area of ​​the air intake surface of the hood device (100).

[0043] The fog detection sensor (110) may be a sensor that detects the amount and concentration of fog, smoke, or water vapor. The fog detection sensor (110) may be, for example, an infrared sensor.

[0044] The processor (160) can control the light irradiation unit to irradiate infrared rays in a preset direction, and can acquire sensing information by sensing the infrared rays reflected from an object (e.g., food, cooking utensil, range surface, wall surface, etc.) through the infrared detection sensor.

[0045] The temperature sensor (120) may be configured to sense the temperature around the air intake of the hood device (100). Additionally, the temperature sensor (120) may sense the temperature of a point located within a preset range from the air intake.

[0046] The processor (160) can control the drive unit (130) of the ventilation fan to rotate based on the sensing information of the fog detection sensor (110) or the temperature sensor (120). As the ventilation fan rotates, air flow is generated, and fog can be sucked into the air intake and then discharged to the outside.

[0047] In addition, the hood device (100) may further include a camera. The camera may be a device for capturing still images and video. According to one embodiment, the camera may include one or more lenses that refract and gather or disperse light (e.g., convex lens, concave lens, spherical lens, planar lens, wide-angle lens, etc.), an image sensor that converts light into an electric charge to acquire an image (e.g., CCD (Charge-Coupled Device), CMOS (Complementary Metal-Oxide Semiconductor)), an image signal processor (160), or a flash. In addition, the camera may include an aperture, a viewfinder, a zebra device that detects whether the image is overexposed through a CCD inside the camera, etc.

[0048] The processor (160) can acquire RGB images by sensing light in the visible light region through a camera. The camera can acquire infrared images by sensing light in the infrared region. However, it is not limited to this, and the processor (160) can acquire images by sensing light of various wavelengths through a camera.

[0049] The processor (160) can obtain an image of an area within a preset range from the air intake of the hood device (100) through a camera.

[0050] The communication interface (140) may include a wireless communication interface, a wired communication interface, or an input interface. The wireless communication interface may communicate with various external devices using wireless communication technology or mobile communication technology. Such wireless communication technologies may include, for example, Bluetooth, Bluetooth Low Energy, CAN communication, Wi-Fi, Wi-Fi Direct, ultrawide band (UWB), Zigbee, infrared data association (IrDA), or near field communication (NFC), and mobile communication technologies may include 3GPP, Wi-Max, LTE (Long Term Evolution), 5G, etc.

[0051] A wireless communication interface can be implemented using an antenna, a communication chip, a substrate, etc., capable of transmitting electromagnetic waves to the outside or receiving electromagnetic waves transmitted from the outside.

[0052] A wired communication interface can communicate with various devices based on a wired communication network. Here, the wired communication network can be implemented using physical cables, such as, for example, pair cables, coaxial cables, fiber optic cables, or Ethernet cables.

[0053] Depending on the embodiment, either the wireless communication interface or the wired communication interface may be omitted. Accordingly, the electronic device may include only the wireless communication interface or only the wired communication interface. In addition, the electronic device may be equipped with an integrated communication interface (140) that supports both wireless connection via the wireless communication interface and wired connection via the wired communication interface.

[0054] The electronic device is not limited to having one communication interface (140) that performs a communication connection in one manner, but may include multiple communication interfaces (140) that perform communication connections in multiple manners.

[0055] The processor (160) can transmit and receive various signals, information, and data by establishing a communication connection with an external device, user terminal, or server through the communication interface (140).

[0056] The processor (160) can transmit an emergency notification signal to an external device, user terminal, or server through the communication interface (140).

[0057] The processor (160) can receive control command information for a ventilation fan of a hood device (100) from a user terminal through a communication interface (140), for example, control command information for controlling a driving unit (130) of a ventilation fan that rotates the ventilation fan.

[0058] The memory (150) stores various programs or data temporarily or non-temporarily and transmits the stored information to the processor (160) upon the call of the processor (160). Additionally, the memory (150) can store various information required for the operation, processing, or control operation of the processor (160) in an electronic format.

[0059] The memory (150) may include, for example, at least one of a main memory and an auxiliary memory. The main memory may be implemented using a semiconductor storage medium such as ROM and / or RAM. The ROM may include, for example, a conventional ROM, EPROM, EEPROM and / or MASK-ROM. The RAM may include, for example, a DRAM and / or SRAM. The auxiliary memory may be implemented using at least one storage medium capable of storing data permanently or semi-permanently, such as a flash memory device, an SD (Secure Digital) card, a solid state drive (SSD), a hard disk drive (HDD), an optical recording medium such as a magnetic drum, a compact disc (CD), a DVD, or a laser disc, a magnetic tape, a magneto-optical disc and / or a floppy disk.

[0060] The processor (160) controls the overall operation of the electronic device. Specifically, the processor (160) is connected to the configuration of the electronic device including the memory (150) as described above, and can control the overall operation of the electronic device by executing at least one instruction stored in the memory (150) as described above. In particular, the processor (160) can be implemented as a single processor as well as as a plurality of processors.

[0061] The processor (160) may be implemented in various ways. For example, one or more processors (160) may include one or more of a CPU (Central Processing Unit), GPU (Graphics Processing Unit), APU (Accelerated Processing Unit), MIC (Many Integrated Core), DSP (Digital Signal Processor), NPU (Neural Processing Unit), hardware accelerator, or machine learning accelerator. One or more processors (160) may control one or any combination of other components of an electronic device and may perform operations or data processing related to communication. One or more processors (160) may execute one or more programs or instructions stored in memory (150). For example, one or more processors (160) may perform a method according to one embodiment of the present disclosure by executing one or more instructions stored in memory (150).

[0062] In the case where the method according to one embodiment of the present disclosure includes a plurality of operations, the plurality of operations may be performed by one processor (160) or by a plurality of processors (160). For example, when the first operation, the second operation, and the third operation are performed by the method according to one embodiment, the first operation, the second operation, and the third operation may all be performed by the first processor, or the first operation and the second operation may be performed by the first processor (e.g., a general-purpose processor) and the third operation may be performed by the second processor (e.g., an artificial intelligence dedicated processor).

[0063] One or more processors (160) may be implemented as a single-core processor including one core, or as one or more multicore processors including multiple cores (e.g., homogeneous multicore or heterogeneous multicore). When one or more processors (160) are implemented as multicore processors, each of the multiple cores included in the multicore processor may include internal processor memory such as on-chip memory (150), and a common cache shared by the multiple cores may be included in the multicore processor (160). Additionally, each of the multiple cores included in the multicore processor (160) (or some of the multiple cores) may independently read and execute program instructions for implementing a method according to one embodiment of the present disclosure, or all (or some) of the multiple cores may be linked together to read and execute program instructions for implementing a method according to one embodiment of the present disclosure.

[0064] When a method according to one embodiment of the present disclosure includes a plurality of operations, the plurality of operations may be performed by one of the plurality of cores included in a multi-core processor, or may be performed by a plurality of cores. For example, when a first operation, a second operation, and a third operation are performed by a method according to one embodiment, the first operation, the second operation, and the third operation may all be performed by a first core included in a multi-core processor, or the first operation and the second operation may be performed by a first core included in a multi-core processor and the third operation may be performed by a second core included in a multi-core processor.

[0065] In embodiments of the present disclosure, the processor (160) may mean a system-on-chip (SoC) in which one or more processors (160) and other electronic components are integrated, a single-core processor, a multi-core processor, or a core included in a single-core processor or a multi-core processor, wherein the core may be implemented as a CPU, GPU, APU, MIC, DSP, NPU, hardware accelerator, or machine learning accelerator, but the embodiments of the present disclosure are not limited thereto.

[0066] FIG. 3 is a flowchart illustrating the operation of a hood device (100) controlling a ventilation fan based on sensing information obtained through a fog detection sensor (110) according to one embodiment of the present disclosure.

[0067] Referring to FIG. 3, the processor (160) can identify the concentration of fog based on sensing information obtained through the fog detection sensor (110) (S310).

[0068] Specifically, the fog detection sensor (110) may be an infrared detection sensor. The processor (160) may control the light irradiation unit to irradiate infrared rays in a preset direction and may obtain sensing information by sensing the infrared rays reflected from an object through the infrared detection sensor.

[0069] In addition, the hood device (100) may include a camera. The processor (160) can acquire an image of an area within a preset range from the air intake of the hood device (100) through the camera, and input the acquired image into a fog identification model to identify the concentration of fog based on the output value.

[0070] If the identified concentration is greater than or equal to a preset value (S320-Y), the processor (160) can control the drive unit (130) of the ventilation fan so that the ventilation fan of the hood device (100) rotates at a first rotational speed per unit time (S330).

[0071] If the identified concentration is less than a preset value (S320-N), the processor (160) can control the drive unit (130) of the ventilation fan so that the ventilation fan of the hood device (100) rotates at a second rotational speed per unit time. Here, the first rotational speed may be a value greater than the second rotational speed.

[0072] Additionally, the processor (160) can control the driving unit (130) of the ventilation fan to increase the rotational speed of the ventilation fan per unit time as the identified concentration increases, and control the driving unit (130) of the ventilation fan to decrease the rotational speed of the ventilation fan per unit time as the identified concentration decreases.

[0073] FIG. 4 is a flowchart illustrating the operation of a hood device (100) controlling a ventilation fan based on sensing information obtained through a temperature sensor (120) according to one embodiment of the present disclosure.

[0074] Referring to FIG. 4, the processor (160) can identify the temperature of a point located within a preset range from the air intake of the hood device (100) based on sensing information obtained through the temperature sensor (120) (S410).

[0075] If the identified temperature is greater than or equal to a preset value (S420-Y), the processor (160) can control the drive unit (130) of the ventilation fan so that the ventilation fan of the hood device (100) rotates at a first rotational speed per unit time (S430).

[0076] If the identified temperature is less than a preset value (S420-N), the processor (160) can control the drive unit (130) of the ventilation fan so that the ventilation fan of the hood device (100) rotates at a second rotational speed per unit time (S440). Here, the second rotational speed may be a value smaller than the first rotational speed.

[0077] Additionally, the processor (160) can control the drive unit of the ventilation fan so that the rotational speed of the ventilation fan becomes the first rotational speed when the ventilation fan is maintained at the second rotational speed per unit time for a time longer than the preset time, and when it is identified that the initial smoke has been generated at a first concentration or higher based on the sensing information obtained through the smoke detection sensor.

[0078] When the rotational speed of the ventilation fan per unit time is maintained at a first rotational speed for a time longer than a preset time, and a second concentration of smoke, which is higher than the first concentration of the initial smoke state, is detected based on sensing information obtained through a smoke detection sensor, the drive unit of the ventilation fan can be controlled so that the rotational speed of the ventilation fan per unit time becomes a third rotational speed, which is a value greater than the first rotational speed.

[0079] If the rotational speed of the ventilation fan per unit time is maintained at a state of being greater than or equal to the third rotational speed for a preset time or longer, the processor (160) can transmit an emergency notification signal to a user terminal through the communication interface (140).

[0080] The processor (160) identifies the number of times an emergency notification signal is transmitted to a user terminal during a preset period, and if the number of times an emergency notification signal is transmitted during the preset period is greater than or equal to a preset value, the processor (160) can identify a first-1 concentration and a second-1 concentration by increasing the first concentration and second concentration values. That is, by increasing the concentration value that serves as a standard for increasing the rotation speed of the ventilation fan, it is possible to prevent the excessive transmission of unnecessary fire notification signals.

[0081] The processor (160) can control the drive unit of the ventilation fan so that the rotational speed of the ventilation fan per unit time becomes the first rotational speed when the ventilation fan is maintained at the second rotational speed per unit time for more than a preset time and, based on sensing information obtained through the smoke detection sensor, it is identified that the initial smoke has been generated at a preset first-1 concentration or higher.

[0082] When the rotational speed of the ventilation fan per unit time is maintained at a first rotational speed for a time longer than a preset time, and based on sensing information obtained through a smoke detection sensor, a second-1 concentration is detected where the amount of smoke is higher than the first-1 concentration of the initial smoke state, the drive unit of the ventilation fan can be controlled so that the rotational speed of the ventilation fan per unit time becomes a third rotational speed, which is a value greater than the first rotational speed.

[0083] If the rotational speed of the ventilation fan per unit time is maintained at a state of being greater than or equal to the third rotational speed for a preset time or longer, the processor (160) can transmit an emergency notification signal to a user terminal through the communication interface (140).

[0084] In addition, the processor (160) can control the driving unit (130) of the ventilation fan to increase the rotational speed of the ventilation fan per unit time as the identified temperature is higher, and control the driving unit (130) of the ventilation fan to decrease the rotational speed of the ventilation fan per unit time as the identified temperature is lower.

[0085] If the rotational speed of the ventilation fan per unit time is maintained above a threshold value for a preset time or longer, the processor (160) can transmit a fire hazard signal to the server through the communication interface (140).

[0086] When the processor (160) receives control command information for the ventilation fan from a user terminal through a communication interface (140), it can control the driving unit (130) of the ventilation fan to rotate the ventilation fan based on the control command information.

[0087] According to one embodiment, the method according to the various embodiments disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product (e.g., downloadable app) may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0088] Although preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above. It is understood that various modifications can be made by those skilled in the art without departing from the essence of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present disclosure. Explanation of the symbols

[0089] 100: Hood device 110: Fog detection sensor 120: Temperature sensor 130: Ventilation fan drive unit 140: Communication interface 150: Memory 160: Processor

Claims

Claim 1 A control method for a hood device comprises: a step of identifying a concentration of mist based on sensing information obtained through a mist detection sensor; a step of controlling a driving unit of a ventilation fan of the hood device to rotate at a first rotational speed per unit time when the identified concentration is greater than or equal to a preset value; and a step of controlling a driving unit of a ventilation fan of the hood device to rotate at a second rotational speed per unit time when the identified concentration is less than a preset value; wherein the first rotational speed is a value greater than the second rotational speed, and the control method comprises a step of transmitting an emergency notification signal to a user terminal through a communication interface when the rotational speed per unit time of the ventilation fan is maintained at a state greater than or equal to a first threshold value for a preset time or longer. Claim 2 A control method according to claim 1, wherein the fog detection sensor is an infrared detection sensor, and the control method comprises: a step of controlling a light irradiation unit to irradiate infrared rays in a preset direction; and a step of obtaining sensing information by sensing infrared rays reflected from an object through the infrared detection sensor. Claim 3 A control method according to claim 1, comprising: a step of acquiring an image of an area within a preset range from the air intake of the hood device through a camera; and a step of identifying the concentration of the mist based on a value output by inputting the acquired image into a mist identification model. Claim 4 In claim 1, the control method comprises controlling the driving unit of the ventilation fan to increase the rotational speed per unit time of the ventilation fan as the identified concentration increases, and controlling the driving unit of the ventilation fan to decrease the rotational speed per unit time of the ventilation fan as the identified concentration decreases. Claim 5 The control method according to claim 1 comprises: a step of identifying the temperature of a point located within a preset range from the air intake of the hood device based on sensing information obtained through a temperature sensor; a step of controlling the driving unit of the ventilation fan of the hood device to rotate at a first rotational speed per unit time if the identified temperature is greater than or equal to a preset value; and a step of controlling the driving unit of the ventilation fan of the hood device to rotate at a second rotational speed per unit time if the identified temperature is less than a preset value. Claim 6 In claim 5, the control method controls the driving unit of the ventilation fan to increase the rotational speed per unit time of the ventilation fan as the identified temperature is higher, and controls the driving unit of the ventilation fan to decrease the rotational speed per unit time of the ventilation fan as the identified temperature is lower. Claim 7 delete Claim 8 In claim 5, the control method comprises the step of transmitting a fire risk signal to a server through a communication interface when the rotational speed per unit time of the ventilation fan is maintained at or above a second threshold value for a preset time. Claim 9 A control method according to claim 1, wherein the control method comprises the step of controlling a driving unit of a ventilation fan to rotate the ventilation fan based on the control command information when control command information of the ventilation fan is received from a user terminal through a communication interface. Claim 10 A non-transient computer-readable recording medium storing at least one instruction that is executed by a processor of a hood device to cause the hood device to perform the control method of claim 1.

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