KR102657236B1 - Fire Prevention Range Hood System and Operating Method using Blower Speed - Google Patents

Abstract

The operating method of the fire prevention range hood system using the blower wind speed control of the present invention is that the hood control unit 70 variably controls the wind speed of the blower 20 at a standard wind speed at specific times based on the temperature measured by the temperature sensor 40 and stores the wind speed. The presence of a fire is determined by comparing the temperature and particle concentration measured at the time of fire with the standard acceleration particle concentration distribution of one particle sensor 30 and the standard acceleration temperature distribution of the temperature sensor 30, and in particular, the variable control of blower wind speed is used at specific times. By operating the blower at a standard wind speed, the standard acceleration particle concentration distribution and standard acceleration temperature distribution stored based on the particle concentration of the particle sensor and the temperature of the temperature sensor are compared with the temperature and particle concentration measured in the fire situation to determine whether the fire is progressing and spreading. It has the characteristics of being

Description

Fire prevention range hood system and operating method using blower wind speed control {Fire Prevention Range Hood System and Operating Method using Blower Speed}

The present invention relates to a fire prevention range hood system, and in particular, uses blower wind speed control to preemptively prevent fire risks by detecting an increase in particle concentration in the duct of the hood through variable control of blower wind speed based on the temperature increase generated during cooking. It relates to fire prevention range hood systems and operating methods.

Recently, the frequency of building fires, especially house fires, occurring while cooking ingredients in the kitchen using cooking devices (e.g. gas range, induction stove, oven, etc.) is increasing.

For example, if a housewife or chef forgets that they are grilling ingredients (e.g. meat or fish) using a kitchen cooking device or does something else due to lack of concentration, they may not be able to recognize or notice that the cooking device is operating, causing the cooking device to malfunction. This is because food ingredients receiving heat may ignite beyond the level of burning.

Moreover, among the hood devices installed in the kitchen, the range hood operates the hood fan during cooking to suck up all the smoke emitted from the food ingredients, so even in situations where the food ingredients (e.g. meat or fish) go beyond the level of burning and may ignite, smoke or odor is generated. It becomes difficult to perceive and recognize this.

As a result, range hood manufacturers are implementing technology to prevent fire hazards in advance by utilizing kitchen hood devices to reduce the rate of fire occurrence during cooking.

As an example of this range hood utilization technology, the odor concentration value of the odor sensor applied to the hood device installed in the kitchen warns or warns that food ingredients (e.g., meat or fish) are burning, thereby preventing a fire from occurring, thereby increasing the risk of kitchen fire using sensors. An example is a sensor-equipped hood device that can prevent situations in advance.

From this, even if you forget that you are cooking in the kitchen or that the cooking appliance is running, you can recognize and recognize this as a caution or warning that food ingredients (e.g. meat or fish) are burning, thereby preventing or preventing the development of a fire hazard situation. Contribute to becoming

Japanese registered patent JP 3919928 B2

However, the sensor-equipped hood device simply uses an odor sensor to warn or warn based on the degree of change in odor concentration value, thereby preventing a fire hazard situation from developing in the kitchen in a situation where one forgets that one is cooking or the cooking appliance is operating. The contribution is insufficient.

Especially in the recent IT (Information Technology) environment, which increases immersion in media and smart devices, and in the medical aspect where the incidence of Alzheimer's disease (i.e., dementia) is increasing, people forget that they are cooking or that the cooking appliance is operating. Even if this occurs more frequently, it is inevitably insufficient to prevent or prevent fire hazards during cooking to some extent.

Accordingly, taking the above into consideration, the present invention increases the particle concentration in the duct of the hood by controlling the variable blower wind speed based on the burning of food ingredients (e.g., fish or meat) left unattended during operation of the cooking appliance or the temperature increase due to overheating of the frying oil. Fire risk is also prevented by detecting, and in particular, the blower wind speed variable control operates the blower at a standard wind speed at specific times, so that the standard accelerated particle concentration distribution and standard accelerated temperature distribution stored based on the particle concentration of the particle sensor and the temperature of the temperature sensor are The purpose is to provide a fire prevention range hood system and operating method using blower wind speed control that determines whether fire progresses and spreads by comparing the temperature and particle concentration measured in a fire situation.

The range hood system of the present invention for achieving the above object includes a blower located at the outlet end of the hood; A particle sensor located in the duct of the hood; A temperature sensor located at the entrance of the hood; and a hood control unit that communicates with and controls the blower, the particle sensor, and the temperature sensor, and when the blower is operated at a standard wind speed at a specific time, the particle concentration measured by the particle sensor and the temperature measured by the temperature sensor are used as a standard. It is characterized by storing the accelerating particle concentration distribution and the standard accelerating temperature distribution and determining whether or not there is a fire by comparing it with the temperature and particle concentration measured at the time of fire.

In addition, the reference accelerating particle concentration distribution includes the particle concentration accelerating distribution measured by the particle sensor at each N stage as the wind speed increases in N steps up to the final target wind speed when the blower is turned on.

In addition, the reference accelerating particle concentration distribution includes a particle concentration deceleration distribution measured by the particle sensor in each N-stage reverse order as the wind speed decreases in the reverse order of N stages from the final target wind speed of the blower.

In addition, when the fire spreads, the particle concentration has a greater deviation over time compared to the reference accelerating particle concentration distribution represented by the particle concentration accelerating distribution and the particle concentration decelerating distribution.

In addition, the reference speed increase temperature distribution includes the temperature increase distribution measured by the temperature sensor at each N level as the wind speed increases in N steps to the final target wind speed when the blower is turned on.

In addition, the reference speed increase temperature distribution includes a temperature deceleration distribution measured by the temperature sensor in the reverse order of N stages as the wind speed decreases in the reverse order of N stages from the final target wind speed of the blower.

In addition, when the fire spreads, the temperature has a greater deviation over time compared to the reference temperature increase distribution represented by the temperature increase distribution and the temperature decrease distribution.

Additionally, the hood control unit transmits the determination of whether there is a fire to a pre-designated smart device via a server or directly.

In order to achieve the above object, the method of operating the fire prevention range hood system of the present invention includes a blower-on step of turning on a blower provided in a duct connected to the hood, and a blower wind speed of the blower from 0th stage, 1st stage to nth stage ( A standard particle concentration measurement step of detecting the particle concentration measurement value of the odor sensor provided in the duct and storing it as a standard accelerating particle concentration distribution while gradually increasing it to (n is an integer), the temperature sensor provided at the inlet end of the hood In the step where the temperature measurement value is detected, when the temperature is above the standard temperature distribution, the blower increases the blower wind speed of the blower to the 0th stage and the nth stage, detects the particle concentration measurement value of the odor sensor, and confirms it with the primary particle concentration distribution. A particle concentration measurement step based on wind speed increase, a particle concentration standard exceedance determination step of comparing the primary particle concentration distribution and the reference accelerating particle concentration distribution, and the primary particle concentration distribution greater than the reference accelerating particle concentration distribution as a fire particle accelerating concentration. It is determined that a fire has occurred while being stored, and the particle concentration measurement value of the odor sensor is detected while gradually reducing the blower wind speed of the blower from stage n to stage 1, and confirmed by secondary particle concentration distribution. Particles based on blower wind speed reduction A concentration measurement step, a particle concentration increase determination step of comparing the secondary particle concentration distribution and the fire particle acceleration concentration, and a case where the secondary particle concentration distribution is smaller than the fire particle acceleration concentration is determined as a fire occurrence, and a case where the secondary particle concentration distribution is larger is determined. It is characterized by being carried out in the stage of determining the spread of fire.

In addition, the method of operating the fire prevention range hood system of the present invention to achieve the above object includes a blower-on stage of turning on the blower provided in the duct connected to the hood, from stage 0, stage 1 to stage n (n is an integer). Stepping to gradually increase the blower wind speed while storing the standard acceleration particle concentration distribution detected by the odor sensor and the standard acceleration temperature distribution detected by the temperature sensor, measuring a temperature compared to the reference temperature distribution at the temperature sensor, the temperature If is greater than the reference temperature distribution, measuring the primary particle concentration distribution with the odor sensor and the primary temperature distribution with the temperature sensor while increasing the blower wind speed in the 0th and nth stages, the primary particles for a fire alarm. A step of comparing whether the concentration distribution is greater than the reference acceleration particle concentration distribution and whether the primary temperature distribution is greater than the reference acceleration temperature distribution. If the comparison result is small, a step of generating the first alarm for a fire occurrence, comparison result When is large, the primary particle concentration distribution is stored as a fire particle acceleration concentration distribution and the primary temperature distribution is stored as a fire temperature acceleration distribution, and the blower wind speed is gradually reduced from the n stage to the 1st stage while the secondary Measuring the particle concentration distribution, and a confirmation alarm when the secondary particle concentration distribution is smaller than the fire particle acceleration concentration distribution and the fire temperature acceleration distribution, or a fire spread judgment when the secondary particle concentration distribution is smaller than the fire temperature acceleration distribution. It is characterized by being carried out in the following steps.

In a preferred embodiment, the odor sensor is provided in the duct, and the temperature sensor is provided at the inlet end of the hood.

In a preferred embodiment, the reference acceleration particle concentration distribution and/or the reference acceleration temperature distribution are the particle concentration measurement values inside the duct detected by the odor sensor in each of the 0th stage and the 1st to nth stages and/or the This is the temperature measurement value at the entrance of the hood detected by the temperature sensor.

In a preferred embodiment, the primary particle concentration distribution and/or the primary temperature distribution is the particle concentration measurement value inside the duct detected by the odor sensor at the 0th stage and the nth stage and/or the hood inlet detected by the temperature sensor. This is the temperature measurement value of the stage.

In a preferred embodiment, the secondary particle concentration distribution and/or secondary temperature distribution is the particle concentration measurement value inside the duct detected by the odor sensor and/or the temperature sensor detected in each of the nth stage to the first stage. This is the temperature measurement value at the entrance of the hood.

The fire prevention range hood system and operation control using the blower wind speed control of the present invention implements the following actions and effects.

First, the variable control of the blower's wind speed detects an increase in particle concentration within the hood's duct, thereby preventing the risk of burning food ingredients (e.g., fish or meat) left unattended during operation of the cooking appliance or fire due to overheating of frying oil. Second, by operating the blower at a standard air volume at a specific time, the standard particle concentration distribution and standard temperature distribution stored based on the particle concentration of the particle sensor and the temperature of the temperature sensor are compared with the temperature and particle concentration measured in a fire situation to determine whether or not there is a fire in a multi-stage manner. It can be judged as follows. Third, the kitchen's essential hood system doubles as a fire prevention method, thereby protecting the kitchen more safely from fire hazards in an environment where the incidence of IT expansion, which causes concentration/distraction, or Alzheimer's disease (i.e., dementia), which causes memory loss, is increasing. You can.

Figure 1 is a configuration diagram of a fire prevention range hood system using blower wind speed control according to the present invention, and Figure 2 is a flow chart of a fire prevention range hood system operating method using blower wind speed control according to the first embodiment of the present invention. Figure 3 is a flowchart of a method of operating a fire prevention range hood system using blower wind speed control according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached illustration drawings. These embodiments are examples and can be implemented in various different forms by those skilled in the art to which the present invention pertains, so they are described herein. It is not limited to the embodiment.

Referring to FIG. 1, the range hood system 1-1 is based on a hood 10 installed toward the kitchen sink 5 in the indoor space 2 of the building 1 and a plurality of sensors 30 and 40. A blower 20 with wind speed control (i.e., rotation speed control) is included.

In particular, the range hood system 1-1 forgets that it is cooking in the kitchen, and food ingredients (e.g., fish or meat) 200 left in the operating state of the cooking device may burn or overheating of frying oil may cause ignition. Proceeding due to the cause can be prevented in advance by the sensor-blower combination configuration of the sensors 30 and 40 and the blower 20.

Therefore, the range hood system 1-1 is characterized as a fire prevention range hood system in which variable blower wind speed control is implemented through a sensor-blower combination configuration.

For example, the building (1) has an indoor space (2) equipped with a kitchen sink (5) and cooking appliances (6) such as a gas range/induction/burner, and a duct (10a) of the hood (10) installed on the side of the kitchen sink (5). ) is divided into an indoor space (2), which forms a space leading to the outside, and a separate ceiling (3). In this case, the building 1 is a concept that includes buildings, high-rise buildings, apartments, villas, and single-family homes.

Specifically, the range hood system 1-1 includes a hood 10, a blower 20, sensors 30 and 40, a speaker 60, a hood control unit 70, and a smart device 100.

For example, the hood 10 is located on the ceiling 3 above the kitchen sink 5 in the indoor space 2, and a hollow duct 10a is connected to the range hood 10 inside the ceiling 3. It extends to the outside along the space and exhausts smoke and odors from the food ingredients sucked in from the hood (10) to the outside. In this case, the hood 10 may be equipped with a hood fan that is automatically driven when the range hood 10 is operated inside the range hood body.

For example, the blower 20 is a typical blower with a fan configuration, and is located at the end of the duct 10a (i.e., externally exposed portion) and the rotation speed is controlled by the duty of the hood control unit 70. In particular, the blower 20 increases the wind speed in n steps from the reference wind speed to the final target wind speed due to a change in rotation speed according to the blower drive, or decreases the wind speed in the reverse order of n steps from the final target wind speed, thereby increasing the speed of the duct 10a in the hood 10. Increases suction power.

For example, the sensors 30 and 40 are composed of a particle sensor 30 located in the duct 10a of the hood 10 and a temperature sensor 40 located at the inlet end of the hood 10, and the particle sensor 30 ) measures the particle concentration including smoke or flame generated in the food material 200 (or ignition source) or the indoor space 2 in the duct 10a and determines the standard particle concentration distribution, standard accelerating particle concentration distribution, and standard decelerating particle concentration distribution. and is used as data that defines the distribution of fire particle acceleration, and the temperature sensor 40 measures the temperature including smoke or flame generated in the food material 200 or the indoor space 2 at the entrance of the hood 10. It is used as data to define the standard temperature distribution, standard acceleration temperature distribution, standard deceleration temperature distribution, and fire temperature acceleration distribution. In this case, the particle concentration includes HC, CO, CO3, etc.

In particular, the particle concentration has the characteristic of increasing deviation over time compared to the reference particle concentration distribution represented by the particle concentration acceleration distribution and the particle concentration deceleration distribution.

And the reference temperature distribution includes the temperature increase distribution measured by the temperature sensor 40 at each n stage in the process of increasing the wind speed in n stages to the final target wind speed when the blower 20 is turned on, In the process of reducing the wind speed in reverse order of n stages (n is an integer of 1 or more) from the final target wind speed of the blower 20, it includes a temperature deceleration distribution measured by the temperature sensor 40 at each reverse order of n stages, and in particular, the above Temperature has the characteristic of increasing deviation over time compared to the standard temperature distribution shown by the temperature acceleration distribution and temperature deceleration distribution when the fire spreads.

For example, the speaker 60 is installed at a location around the kitchen sink 5 or at a random location in the indoor space 2, and is controlled by the hood control unit 70 to sound a warning sound (e.g., the first alarm at S71 and S101 in FIG. 3). generates a confirmation alarm). In this case, the speakers 60 may be composed of a plurality of speakers with different installation positions.

For example, the hood control unit 70 is equipped with a memory and a central processing unit storing a blow variable wind speed control logic or program based on the particle concentration measurement value of the particle sensor 30 and the temperature measurement value of the temperature sensor 40, A blow variable wind speed control signal for the blower 20 is output using the sensor signal values of the particle sensor 30 and the temperature sensor 40 as input data.

In particular, the blow variable wind speed control signal output changes the rotation speed to increase the wind speed in n steps from the reference wind speed of the blower to the final target wind speed with respect to the driving of the blower 20, or decreases the wind speed in the reverse order of n steps from the final target wind speed. It is divided into changes in rotation speed and deceleration. In this case, the rotation speed increase change and the rotation speed reduction change are applied in stages 0, 1 to n (n is an integer of 2 or more) indicating stage 0 of no wind speed, stage 1 of reference wind speed, and stage N of final target wind speed, 0 Between stages and n, at least two levels of rotational speed change are applied.

For this purpose, the hood control unit 70 uses data to define the standard particle concentration distribution, the standard accelerating particle concentration distribution, and the standard accelerating particle concentration distribution based on the particle concentration measurement value of the particle sensor 30, and the temperature sensor 40 ) is used as data to define the standard temperature distribution, standard acceleration temperature distribution, and standard deceleration temperature distribution based on the temperature measurement values.

In addition, the hood control unit 70 is equipped with a fire judgment standard list 70-1, and the fire judgment standard list 70-1 includes a standard particle concentration distribution, a standard accelerating particle concentration distribution, and a standard decelerating particle concentration. A list defining the distribution and fire particle acceleration distribution, a list defining the standard temperature distribution, standard acceleration temperature distribution, standard deceleration temperature distribution, and fire temperature acceleration distribution for temperature are constructed as a table. In addition, in the fire judgment standard list 70-1, a list of ignition possible temperatures for interior materials of the indoor space 2 is also constructed as a table.

For example, the smart device 100 communicates with the hood control unit 70 through Bluetooth and wireless communication, and when communicating with each other, an alarm from the hood control unit 70 (e.g., the first alarm of S71 and the confirmation alarm of S101 in FIG. 3) is transmitted. is displayed on the screen. In this case, the smart device 100 includes a smart phone, a note pad, etc.

Meanwhile, Figures 2 and 3 respectively illustrate a fire prevention range hood system and operating method using blower wind speed control. In this case, the operation method is controlled by the hood control unit 70.

First, referring to Example 1 of FIG. 2 together with FIG. 1, the operating method of Example 1 applies the time when the temperature is greater than the reference temperature as the fire start detection time and particle concentration (HC, CO, CO3, etc.) with respect to the progress of the fire. It is carried out considering as the main basis.

Specifically, the method of operating the range hood system begins with the blow-on step of S10, and the blow-on is an electrical contact connection of the blower turn-on of the hood control unit 70.

Subsequently, the hood control unit 70 performs the standard particle concentration measurement step of S20 to S30, the temperature measurement step of S40, the particle concentration measurement step based on the increase in blower wind speed of S50 to S54, the particle concentration exceedance standard determination step of S60, and the blower measurement step of S70 to S76. The particle concentration measurement step based on wind speed reduction, the particle concentration increase judgment step of S80, the fire occurrence judgment step of S90, or the fire spread judgment step of S100 are performed.

Specifically, the reference particle concentration measurement (S20~S30) includes the step of setting the blower wind speed to stage 0 and measuring the particle concentration at stage 0 of the blower wind speed in S20, the basic particle concentration measurement step based on the increase in blower wind speed of S22~S24, and the standard particle speed increase in S30. It is performed as a concentration distribution storage step.

For example, the blower wind speed 0 stage (S20) is no wind speed because the fan is stopped when the blower is turned on in the hood control unit 70. This means that smoke from the food material 200 naturally passes through the hood 10 and enters the duct ( This is the particle concentration measurement value of the particle sensor 30 inside the duct when entering 10a).

For example, the basic particle concentration measurement (S22 to S24) based on the increase in blower wind speed is performed in the step of measuring particle concentration at the first stage of blower wind speed in S22 and the particle concentration measurement step at stage n of blower wind speed in S24. It is characterized as a primary measurement with a basic measurement of particle concentration based on increasing blower wind speed.

Therefore, the blower wind speed 1st stage (S22) is a state in which the blower 20 is rotated to the standard wind speed by increasing the rotation speed from 0 due to the wind speed increase signal output from the hood control unit 70, and the blower wind speed n stage ( S24) is a state in which the blower 20 is rotated from the reference wind speed rotation speed to the final target wind speed due to the wind speed increase signal output from the hood control unit 70. In this case, the n stage may be 2 or 3 or more stages, and this is set to a variable number of settings depending on the size of the building (1).

For example, the reference particle acceleration concentration distribution storage (S30) is the 0th stage particle concentration value (S20) and 1st stage particle concentration value (S22), which are particle concentration measurements measured at the 0th stage, 1st stage, and nth stage of blower wind speed, respectively. , the n-stage particle concentration value (S24) is confirmed in the hood control unit 70, and the change in particle concentration through this is considered a change in particle acceleration concentration and is stored as a standard value applied to fire judgment. In this case, the storage is performed as a reference particle acceleration concentration distribution in the memory of the hood control unit 70.

Subsequently, the temperature measurement (S40) is performed by checking the temperature measurement value of the temperature sensor 40 at the entrance of the hood 10 at the hood control unit 70. In this case, the hood control unit 70 stores the reference particle acceleration concentration distribution obtained by controlling the blower 20 from 0 to n stages and then measures the temperature of the temperature sensor 40 after a predetermined time (e.g., a few seconds or less). Check the value.

Subsequently, the particle concentration measurement based on the increase in blower wind speed (S50 to S54) is performed in the temperature rise determination step of S50 and the particle concentration measurement step based on the increase in blower wind speed in S52 to S54. In this case, the blower wind speed n stage (S54) means any one of the first to n stages.

For example, the temperature rise determination (S50) applies the following temperature rise determination equation.

Temperature rise judgment formula: temperature > standard temperature distribution?

Here, “temperature” is the temperature measurement value of the temperature sensor 40, and “reference temperature distribution” is the ignition possible temperature stored in the fire judgment standard list (70-1) for interior materials of the indoor space (2).

Therefore, the temperature rise determination (S50) matches “temperature” with the ignition possible temperature of the fire judgment standard list (70-1), and the current temperature measurement value is less than the temperature value of the standard temperature distribution under the interior material conditions set through this. In this case, it returns to the temperature measurement step of S40, while in the above case, it enters the particle concentration measurement step based on the increase in blower wind speed in S52 to S54.

For example, the particle concentration measurement based on the increase in blower wind speed (S52 to S54) is performed in the step of measuring the particle concentration at the 0th stage of the blower wind speed in S52 and the particle concentration measurement step at the nth stage of the blower wind speed in S54. This is characterized as a secondary measurement with the basic particle concentration measurement (S22~S24) based on the increase in blower wind speed as the primary measurement.

Therefore, the blower wind speed 0 stage (S52) is the particle concentration measurement value of the particle sensor 30 after time has elapsed with respect to the inside of the duct in a no wind speed state with the fan stopped, and the blower wind speed n stage (S54) is the particle concentration measurement value of the hood control unit 70. The wind speed increase signal output is the particle concentration measurement value of the particle sensor 30 for the inside of the duct at or below the final target wind speed. In this case, the hood control unit 70 uses the particle concentration re-measurement value obtained from the particle concentration measurement (S52 to S54) based on the increase in blower wind speed as the particle concentration distribution of the secondary measurement and stores it in the memory.

For example, the particle concentration standard exceedance determination (S60) applies the particle concentration standard exceedance judgment formula below to compare the particle concentration distribution (S54) with the reference particle acceleration concentration distribution (S30).

Determination formula for exceeding the particle concentration standard: particle concentration distribution > standard accelerating particle distribution?

Therefore, the determination of exceeding the particle concentration standard (S60) matches the “particle concentration distribution” with the standard accelerating particle concentration distribution in the fire judgment standard list (70-1), and through this, the current particle concentration distribution is higher than the standard accelerating particle concentration distribution. If it is small, it returns to the temperature measurement step of S40, while if it is large, it enters the particle concentration measurement step based on blower wind speed reduction in S70 to S76.

Specifically, the particle concentration measurement based on the blower wind speed deceleration (S70 to S76) is performed in the fire occurrence determination step of S70, the fire particle acceleration concentration distribution storage step of S72, and the particle concentration measurement step based on the blower wind speed deceleration of S74 to S76.

For example, in the fire occurrence determination (S70), the particle concentration distribution increases compared to the reference particle acceleration distribution, and the particle concentration measurement value of the particle sensor 30 increases over time, and the fire particle acceleration concentration distribution storage (S72) is a state in which the difference between the reference particle acceleration distribution (S30) and the particle concentration distribution (S54) is stored in the memory as the fire particle acceleration concentration distribution.

And the particle concentration measurement based on the blower wind speed reduction (S74 to S76) is a step of setting the blower wind speed at stage n and measuring the particle concentration at the nth stage of the blower wind speed in S74, and setting the blower wind speed at stage 1 and measuring the particle concentration at the first stage of the blower wind speed at S76. It is carried out as This is characterized as a tertiary measurement with the basic particle concentration measurement (S52~S54) based on the increase in blower wind speed as the secondary measurement. In this case, the hood control unit 70 uses the particle concentration re-measurement value obtained from the blower wind speed reduction-based particle concentration measurement (S74 to S76) as the particle concentration distribution of the third measurement and stores it in memory.

For example, the particle concentration increase determination (S80) applies the particle concentration increase determination equation below to compare the particle concentration distribution (S74 to S76) with the fire particle acceleration concentration distribution (S72).

Particle concentration increase judgment formula: Particle concentration distribution > Fire particle acceleration concentration distribution?

Therefore, the particle concentration increase determination (S80) matches the “particle concentration distribution” with the fire particle acceleration concentration distribution in the fire judgment standard list (70-1), and through this, the current particle concentration distribution is smaller than the fire particle acceleration concentration distribution. In some cases, it switches to the fire occurrence judgment stage of S90, while in large cases, it switches to the fire spread judgment stage of S100.

For example, the fire occurrence judgment (S90) is when the food material 200 becomes an ignition source and a fire occurs in the kitchen area of the indoor space (2), and the fire spread judgment (S100) is when the food material 200 becomes an ignition source and a fire occurs in the indoor space (2). This is a case where the fire spread from the kitchen to the living room in space (2).

Finally, the hood control unit 70 sends a fire detection (S90) or Provides information on fire spread determination (S100).

On the other hand, referring to Example 2 of FIG. 3 together with FIG. 1, the operating method of Example 2 applies the time when the temperature is greater than the reference temperature as the fire start detection time and particle concentration (HC, CO, CO3, etc.) with respect to the progress of the fire. and temperature together as the main basis.

Therefore, the operating method of Example 2 proceeds with the same procedure as the operating method according to Example 1 of FIG. 2, but has a difference in that some steps are omitted or applied differently as the temperature measurement value is applied at each step, and through this, fire detection is performed. The advantage of being able to more quickly judge and warn about situations that occur can be realized.

Specifically, in the method of operating the range hood system of Example 2, the blower-on of S10 begins with the blower-on step by turning on the blower of the hood control unit 70, followed by measuring the reference particle concentration and temperature of S20 to S30. Step, temperature measurement step of S40, particle concentration and temperature measurement step based on increase in blower wind speed of S50~S51, temperature-based particle concentration excess determination step of S61, fire first alarm step of S71, particle concentration based on blower wind speed reduction of S73~S77. And the temperature measurement step, the temperature-based particle concentration increase determination step of S81, the fire confirmation alarm step of S101, or the fire spread determination step of S91 are performed.

Specifically, the standard particle concentration and temperature measurement (S20 to S30) is the particle concentration and temperature measurement step at blower wind speed setting and blower wind speed 0 step in S20, and the basic particle concentration and temperature measurement step based on the increase in blower wind speed in S22 to S24. , It is performed in the steps of storing the standard particle acceleration concentration distribution and the standard particle acceleration temperature distribution in S30.

For example, since the blower wind speed 0 stage (S20) is no wind speed, it is the particle concentration measurement value inside the duct of the particle sensor 30 and the temperature measurement value of the hood inlet end of the temperature sensor 40, and based on the increase in the blower wind speed The basic particle concentration and temperature measurements (S22~S24) are the particle concentration and temperature measurements at the reference wind speed of the first blower wind speed of S22 and the nth blower wind speed of S24 (i.e., the final target wind speed).

For example, the storage of the standard particle acceleration concentration distribution and the standard acceleration temperature distribution (S30) includes the 0-stage particle concentration value and temperature value (S20), which are particle concentration measurements measured at the 0th stage, 1st stage, and nth stage of the blower wind speed, respectively. The first-stage particle concentration value and temperature value (S22) and the n-stage particle concentration value and temperature value (S24) are checked in the hood control unit 70, and the particle concentration change through these is converted into the particle acceleration concentration change and the temperature change into the acceleration temperature change. This refers to the standard value applied to the fire judgment that is stored. In this case, the storage is performed using the reference particle acceleration concentration distribution and the standard particle acceleration temperature distribution in the memory of the hood control unit 70.

Subsequently, the temperature measurement (S40) is performed by checking the temperature measurement value of the temperature sensor 40 at the entrance of the hood 10 at the hood control unit 70. In this case, the hood control unit 70 stores the standard acceleration temperature distribution and then checks the temperature measurement value of the temperature sensor 40 after a predetermined time (e.g., several seconds or less).

Subsequently, the particle concentration and temperature measurement based on the increase in blower wind speed (S50 to S54) is performed in the temperature rise determination step of S50 and the particle concentration and temperature measurement step based on the increase in blower wind speed in S52 to S54. In this case, the blower wind speed n stage (S54) means any one of the first to n stages.

For example, the temperature rise determination (S50) applies the temperature rise judgment formula “temperature > reference temperature distribution?”, where the “temperature” is the temperature measurement value of the temperature sensor 40, and the “reference temperature distribution” is the indoor This is the ignition potential temperature stored in the fire judgment standard list (70-1) for the interior materials of space (2).

As a result, the temperature rise determination (S50) returns to the temperature measurement step of S40 if the current temperature measurement value is less than the temperature value of the standard temperature distribution, while if it is above the temperature value, it returns to the particle concentration and temperature measurement step based on the increase in blower wind speed of S52 to S54. Enter.

For example, the particle concentration and temperature measurement based on the increase in blower wind speed (S51) is performed by setting the blower wind speed to level n and then measuring particle concentration and temperature. This is characterized as a secondary measurement with the basic measurement of particle concentration and temperature (S22~S24) based on the increase in blower wind speed as the primary measurement.

Therefore, the blower wind speed n stage (S51) is a state in which the blower 20 is driven between the reference wind speed (i.e., first stage) and the final target wind speed due to the wind speed increase signal output from the hood control unit 70. In this case, in the blower wind speed n stage (S51), “n” is an integer of 1 or more, and increases step by step, such as 1, 2, and 3.

In this state, the particle sensor 30 detects the particle concentration measurement value inside the duct and the temperature sensor 30 detects the temperature measurement value at the hood inlet, and the hood control unit 70 detects the particle concentration measurement value for the inside of the duct, and the hood control unit 70 detects the particle concentration measurement value for the inside of the duct. The particle concentration re-measured value obtained from the particle concentration measurement (S51) is stored in memory as the particle concentration distribution and temperature distribution of the second measurement.

For example, the temperature-based particle concentration standard exceedance judgment (S61) applies the particle concentration standard exceedance judgment formula below to compare the particle concentration distribution and temperature distribution (S51) with the standard accelerated particle concentration distribution and standard accelerated temperature distribution (S30). .

Determination formula for exceeding the particle concentration standard: particle concentration distribution > standard accelerating particle distribution? & Temperature distribution > Standard increase temperature distribution?

Therefore, the determination (S61) of exceeding the temperature-based particle concentration standard is made by matching “particle concentration distribution” and “standard acceleration particle concentration distribution” and “temperature distribution” and “standard acceleration temperature distribution” through the fire judgment standard list (70-1). ” is matched, and through this, if the current particle concentration distribution is smaller than the standard acceleration particle concentration distribution and at the same time the “temperature distribution” is smaller than the “standard acceleration temperature distribution, it switches to the fire first alarm stage of S71, and further goes to S51. Return and increase the blower air speed by one level. In this case, the first fire alarm (S71) includes an alarm state regarding the possibility of fire occurrence.

On the other hand, the determination of exceeding the temperature-based particle concentration standard (S61) is made when the current particle concentration distribution is greater than the standard accelerating particle concentration distribution and at the same time the “temperature distribution” is greater than the “standard accelerating temperature distribution.” The blower wind speed deceleration-based particles in S73 to S77 are Enter the concentration and temperature measurement stage.

Specifically, the particle concentration and temperature measurement based on blower wind speed deceleration (S73 to S77) is performed in the step of storing the fire particle acceleration concentration distribution and fire temperature increase distribution in S73 and the particle concentration and temperature measurement step based on blower wind speed deceleration in S75 to S77. .

For example, in the storage of the fire particle acceleration concentration distribution and the fire temperature acceleration distribution (S73), the particle concentration distribution increases compared to the reference particle acceleration distribution, so that the particle concentration measurement value of the particle sensor 30 increases with time, and at the same time, the standard particle acceleration temperature increases. As the temperature distribution increases relative to the distribution, the temperature measurement value of the temperature sensor 40 increases over time, and through this, the difference between the reference particle acceleration distribution (S30) and the particle concentration distribution (S51) is converted into the fire particle acceleration concentration distribution. At the same time, the difference between the standard temperature increase distribution (S30) and the temperature distribution (S51) is stored in memory as the fire temperature increase concentration distribution.

And the particle concentration measurement based on the blower wind speed reduction (S75 to S77) is the particle concentration and temperature measurement step at the nth stage of the blower wind speed by setting the nth stage of the blower wind speed in S75, and the 1st stage of the blower wind speed by the 1st stage blower wind speed setting in S77. It is performed in the particle concentration and temperature measurement steps. This is characterized as a tertiary measurement with the basic measurement of particle concentration and temperature (S51) based on the increase in blower wind speed as the secondary measurement. In this case, the hood control unit 70 stores the particle concentration re-measurement value and temperature re-measurement value obtained from the particle concentration measurement (S75 to S77) based on blower wind speed reduction as the particle concentration distribution and temperature distribution of the third measurement in the memory. .

For example, the temperature-based particle concentration increase determination (S81) applies the particle concentration increase determination formula below to compare the particle concentration distribution and temperature distribution (S75 to S77) with the fire particle acceleration concentration distribution and fire temperature acceleration distribution (S73). .

Particle concentration increase judgment formula: Particle concentration distribution > Fire particle acceleration concentration distribution? & Temperature distribution > Fire temperature acceleration distribution?

Therefore, the temperature-based particle concentration increase judgment (S81) is based on matching “particle concentration distribution” and “fire particle acceleration concentration distribution” and “temperature distribution” and “fire temperature acceleration distribution” through the fire judgment standard list (70-1). Matching is made, and through this, if the current particle concentration distribution is smaller than the fire particle acceleration concentration distribution and at the same time the “temperature distribution” is smaller than the “fire temperature acceleration distribution,” it switches to the fire confirmation alarm stage of S101.

On the other hand, the temperature-based particle concentration increase judgment (S81) matches “particle concentration distribution” and “fire particle acceleration concentration distribution” and “temperature distribution” and “fire temperature acceleration distribution” through the fire judgment standard list (70-1). Matching is made, and through this, if the current particle concentration distribution is greater than the fire particle acceleration concentration distribution and at the same time the “temperature distribution” is greater than the “fire temperature acceleration distribution,” the process switches to the fire spread judgment step of S91.

Finally, the hood control unit 70 sends the first alarm (S71) or fire to the relevant person outside or outside the indoor space (2) within the building (1) by transmitting via the server or directly to the pre-designated smart device (100). Provides information on outbreak determination (S90) or fire spread determination (S100).

As described above, the method of operating the fire prevention range hood system using blower wind speed control according to the present embodiment is that the hood control unit 70 operates the blower 20 at a reference wind speed at a specific period based on the temperature measured by the temperature sensor 40. ) is determined by comparing the temperature and particle concentration measured at the time of fire with the standard acceleration particle concentration distribution of the particle sensor 30 and the standard acceleration temperature distribution of the temperature sensor 30 stored by variable wind speed control, and in particular, the blower By operating the blower at a standard wind speed at a specific time with variable wind speed control, the standard accelerated particle concentration distribution and standard accelerated temperature distribution stored based on the particle concentration of the particle sensor and the temperature of the temperature sensor are compared with the temperature and particle concentration measured in a fire situation. The progress and spread of the fire is determined.

1: building
1-1: Fire prevention range hood system
2: Indoor space 3: Ceiling
5: Kitchen sink 6: Cooking equipment
10: hood 10a: duct
20: blower 30: particle sensor
40: Temperature sensor 60: Speaker
70: Hood control unit 70-1: List of fire judgment standards
100: Smart device 200: Food ingredients

Claims (19)

In the range hood system,
A blower located at the outlet end of the hood;
A particle sensor located in the duct of the hood;
A temperature sensor located at the entrance of the hood; and
It includes a hood control unit that communicates with and controls the blower, particle sensor, and temperature sensor,
When the blower is operated at a standard wind speed at a specific time, the standard particle concentration distribution and the standard temperature distribution are stored from the particle concentration measured by the particle sensor and the temperature measured by the temperature sensor, and the temperature and particle concentration measured at the time of fire are stored. Determine whether there is a fire by comparing,
The reference particle concentration distribution is a range hood system characterized in that when the blower is turned on, the wind speed increases in N steps up to the final target wind speed, and includes a particle concentration increase distribution measured by the particle sensor in each N step.
delete According to paragraph 1,
The reference particle concentration distribution is a range hood system characterized in that it includes a particle concentration deceleration distribution measured by the particle sensor for each N stage as the wind speed decreases in the reverse order of N stages from the final target wind speed of the blower.
According to paragraph 3,
A range hood system, wherein when a fire spreads, the particle concentration has a greater deviation over time compared to the reference particle concentration distribution represented by the particle concentration acceleration distribution and the particle concentration deceleration distribution.
According to paragraph 1,
The reference temperature distribution is a range hood system characterized in that when the blower is turned on, the wind speed increases in N stages up to the final target wind speed, and includes a temperature increase distribution measured by the temperature sensor in each N stage.
According to clause 5,
The reference temperature distribution is a range hood system characterized in that the wind speed decreases in the reverse order of N stages from the final target wind speed of the blower and includes a temperature deceleration distribution measured by the temperature sensor in the reverse order of N stages.
According to clause 6,
A range hood system, wherein when a fire spreads, the temperature has a greater deviation over time compared to the reference temperature distribution represented by the temperature acceleration distribution and the temperature deceleration distribution.
The method of any one of claims 1 and 3 to 7,
The range hood system is characterized in that the hood control unit transmits the determination of whether there is a fire to a pre-designated smart device via a server or directly.
A blower-on step of turning on the blower provided in the duct connected to the hood,
A step of gradually increasing the blower wind speed from the 0th stage and the 1st stage to the nth stage (n is an integer) and storing the standard increased particle concentration distribution detected by the odor sensor,
A step in which the temperature compared to the reference temperature distribution is measured by the temperature sensor,
If the temperature is greater than the reference temperature distribution, measuring the primary particle concentration distribution with the odor sensor while increasing the blower wind speed in the 0th and nth stages,
Comparing whether the primary particle concentration distribution is greater than the reference accelerating particle concentration distribution to determine whether a fire occurs;
If the comparison result is large, storing the primary particle concentration distribution as a fire particle acceleration concentration distribution and measuring the secondary particle concentration distribution with the odor sensor while gradually reducing the blower wind speed from stage n to stage 1, and
A step of determining a fire occurrence when the secondary particle concentration distribution is smaller than the fire particle acceleration concentration distribution or determining a fire spread when the secondary particle concentration distribution is larger.
A method of operating a range hood system, characterized in that performed as follows.
The method of claim 9, wherein the odor sensor is provided in the duct,
A method of operating a range hood system, wherein the temperature sensor is provided at an inlet end of the hood.
The method of claim 9, wherein the reference particle concentration distribution is a particle concentration measurement value inside the duct detected by the odor sensor in each of the 0th stage and the 1st to nth stages.
The method of claim 9, wherein the primary particle concentration distribution is a particle concentration measurement value inside the duct detected by the odor sensor at the 0 stage and the n stage.
The method of operating a range hood system according to claim 9, wherein the secondary particle concentration distribution is a particle concentration measurement value inside the duct detected by the odor sensor in each of the nth to first stages.
A blower-on step of turning on the blower provided in the duct connected to the hood,
A step of gradually increasing the blower wind speed from the 0th stage and the 1st stage to the nth stage (n is an integer) while storing the standard acceleration particle concentration distribution detected by the odor sensor and the standard acceleration temperature distribution detected by the temperature sensor,
Measuring a temperature compared to a reference temperature distribution at the temperature sensor,
If the temperature is greater than the reference temperature distribution, measuring the primary particle concentration distribution with the odor sensor and the primary temperature distribution with the temperature sensor while increasing the blower wind speed in the 0th and nth stages,
Comparing whether the primary particle concentration distribution is greater than the reference accelerating particle concentration distribution and whether the primary temperature distribution is greater than the reference accelerating temperature distribution for a fire alarm;
If the comparison result is small, the first alarm for fire occurrence is generated,
If the comparison result is large, the primary particle concentration distribution is stored as the fire particle acceleration concentration distribution and the primary temperature distribution is stored as the fire temperature acceleration distribution, and the blower wind speed is gradually reduced from the n stage to the 1st stage while the odor sensor measuring the secondary particle concentration distribution, and
A step of setting a confirmation alarm when the secondary particle concentration distribution is smaller than the fire particle acceleration concentration distribution and the fire temperature acceleration distribution or determining a fire spread when the secondary particle concentration distribution is larger than the fire particle acceleration distribution.
A method of operating a range hood system, characterized in that performed as follows.
The method of claim 14, wherein the odor sensor is provided in the duct,
A method of operating a range hood system, wherein the temperature sensor is provided at an inlet end of the hood.
The method of claim 14, wherein the reference accelerated particle concentration distribution and the reference accelerated temperature distribution are the particle concentration measurement value inside the duct detected by the odor sensor and the temperature sensor detected in each of the 0th stage and the 1st to nth stages. A method of operating a range hood system, characterized in that the temperature is measured at the entrance of one hood.
The method of claim 14, wherein the primary particle concentration distribution and the primary temperature distribution are the particle concentration measurement value inside the duct detected by the odor sensor at the 0th stage and the nth stage and the temperature measurement at the entrance end of the hood detected by the temperature sensor. A method of operating a range hood system characterized by a value.
The method of claim 14, wherein the secondary particle concentration distribution and the secondary temperature distribution are the particle concentration measurement value inside the duct detected by the odor sensor in each of the nth stage to the first stage and the particle concentration measurement value at the hood inlet detected by the temperature sensor. A method of operating a range hood system, characterized in that the temperature measurement value.
The method of operating a range hood system according to claim 9 or 14, wherein the fire occurrence is transmitted from the hood control unit to the smart device.

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