KR102619065B1 - Controlling Method for In-line Fan Installed Ventilation hood - Google Patents

Abstract

The present invention relates to an in-line type kitchen hood and its control method. In order to effectively discharge odors and heat, the hood is equipped with an in-line module integrated with an in-line fan (so-called direct flow in-line fan), an inlet silencer, and an outlet silencer with a built-in damper (so-called reducer). By installing it on top of the collection shade and lowering the height of the hood, it is discharged through a smoothly installed curved pipe to reduce static pressure loss. In order for the hood to properly discharge harmful substances and food cooking smells generated during combustion to the outdoors, the emitted local pollutants are discharged. It operates effectively before mixing with indoor air, and the hood must be operated at all times even before pollutants are generated. However, if it is always operated, a large amount of power is consumed, so fine dust and CO2 sensors are used to determine whether indoor pollution is a situation that requires simple ventilation or not. Determine whether it is a pollution situation caused by the use of a range, and if ventilation discharge is required due to indoor CO2 generation rather than fine dust generation, the BLDC hood motor operates at less than 1/2 the rotation speed at the maximum exhaust rate, while satisfying the minimum indoor ventilation amount and always running less than 10W. It is characterized by a pollution concentration control-based control of a low-power inline fan hood that minimizes the amount of power consumption by controlling the power consumption to enable regular operation.

Description

{Controlling Method for In-line Fan Installed Ventilation hood}

The present invention relates to an in-line kitchen hood and its control method. The present invention relates to an in-line kitchen hood and a control method thereof, which includes an in-line fan (so-called diagonal flow-type in-line fan) installed on the hood collector to effectively discharge odor and heat, an inlet silencer, and an outlet silencer with a built-in damper (so-called reducer). Uses an integrated inline module. In order for the hood to properly discharge harmful substances generated during combustion and food cooking odors outdoors, it must be operated before the emitted local pollutants mix with indoor air, so indoor fine dust and CO2 sensor measurement pollution are detected even before cooking-related pollutants are generated. This relates to a control method based on pollution concentration control of a low-power inline fan hood to minimize power consumption while operating constantly according to the concentration value.

Various harmful substances generated during cooking in the kitchen are the main cause of indoor air pollution. In particular, it is necessary to properly discharge harmful substances generated during combustion and cooking odors outdoors to prevent them from spreading to other indoor spaces or the entire building. Removal of harmful substances and odors through hoods plays an important role in maintaining a pleasant and safe indoor air environment. The heat generated by combustion in a gas stove is transferred to the food and the heat needed for the cooking process, and some of it is discharged through the hood. The rest spreads around the kitchen and becomes a heat gain factor, increasing the kitchen's cooling load and becoming a major factor in the spread of cooking smells indoors.

In order to effectively discharge these odors and heat, a centrifugal die fan (aka sirocco fan) installed in the hood collector is mainly used. The Sirocco fan, a type of centrifugal forward vane commonly used in range hoods, has forward curved blades and can produce a large flow rate even in a small size at a relatively low load. In addition, the rotation speed is lower than that of a backward curved centrifugal fan of similar size and the same flow rate, resulting in lower noise, so despite its low efficiency, it is currently widely used in air conditioning equipment, ventilation equipment, and kitchen appliances. If an axial flow fan is applied in-line to a kitchen hood, the required static pressure cannot be overcome and the air volume drops significantly, causing a significant increase in noise when the kitchen hood discharges the required air volume. Summarizing this, it can be said that the forward-wing centrifugal fan has a specific speed suitable for the hood. Here, the specific speed is a non-dimensionalized value of the number of rotations by the required static pressure and wind volume as shown in the following equation: .

Centrifugal vane blower noise is largely composed of two components: broadband noise and discrete frequency noise. Broadband noise refers to aerodynamic noise such as blower turbulence inflow noise, wing trailing edge noise caused by the interaction between the boundary layer flow on the impeller blade and the trailing edge of the blade. Discrete frequency noise is a discontinuously distributed noise with a high noise level at harmonic frequencies that are integer multiples of the impeller rotor blade passage frequency, and is caused by load noise caused by steady-state load in the low-frequency region, blade passage separation flow, and mutual interference with the rear end. This is noise caused by abnormal load changes.

In order to reduce the discrete and broadband noise of blowers for hoods, U.S. Patent Publication No. 09/287,649 describes a design and manufacturing method for reducing noise by installing a muffler-type flow guide at the inlet and outlet of the hood housing. In addition, as a design method to reduce blower discrete noise, U.S. Patent Publication No. 5603607 shows an invention that reduces noise by making the rear end of the blower blade into a sawtooth shape to interfere with the phase of rear noise generation. In addition, there is also a known technology that realizes low noise by arranging the spacing of wings of the same shape unevenly to generate a phase difference between noise sources of the same size. However, to install a centrifugal sirocco fan in a range hood, the centrifugal sirocco fan casing of Figure 1(a) is fixed to the rectangular box of Figure 1(c) installed on the hood shade, resulting in the flow path shown in Figure 2. One problem is that a silencer cannot be installed at the bottom of the fan, where the greatest noise is emitted, or a silencer that occupies a large space cannot be installed.

In addition, in order to properly discharge harmful substances generated during combustion and food cooking odors outdoors, a duct called a java is connected to the external or common duct to the damper installed downstream of the hood air flow path, that is, at the top of the hood, as shown in Figure 3. Due to limitations in housing space, the gas is discharged at a bend of 90 degrees, resulting in the greatest loss of euros. This means that the combined height of the hood shade height (H ₁ ), fan scroll height (H ₃ ), and damper height (H ₄ ) becomes very large, making it impossible to secure a sufficient bellows installation height (H ₅ ), which ultimately causes the pollution collected through the hood. There is a second problem in that air is discharged through a hastily installed 90-degree bend pipe, causing a large static pressure loss and reducing the amount of discharged air.

As shown in the fan performance curve shown in Figure 5, when a 160mm fan is used in a 150mm diameter, the air volume is proportional to the third power of the diameter and the static pressure also increases in proportion to the square of the diameter, so the rotation is equal to the increase in air volume caused by the increase in diameter. Reducing the number can ultimately reduce noise, but as can be seen in FIG. 4, the diameter of the fan increases in the direction of the hood height, causing the scroll to increase in the same direction, so there is a third problem in that the overall height of the hood increases.

In addition, in order for the hood to properly discharge harmful substances generated during combustion and food cooking odors outdoors, it must be operated before the emitted local pollutants mix with the indoor air. According to research results, the hood must be operated before pollutants are generated. Since it is said to have the highest efficiency, artificial intelligence automatic operation using fine dust and CO2 sensors is required, but there is a fourth problem that increases power consumption during regular operation.

The present invention was developed to solve the problems of the prior art as described above, and effectively exhausts odor and heat by using an inline fan installed on the hood shade, an inline module with an inlet silencer, and an outlet silencer with a built-in damper, and prevents combustion of cooking utensils. In order to properly discharge harmful substances and food cooking odors generated outdoors, the hood is activated before the emitted local pollutants mix with the indoor air, so indoor fine dust and CO2 sensor measured pollution concentration even before cooking-related pollutants are generated. The purpose is to provide a control method based on pollution concentration control of a low-power inline fan hood to minimize power consumption while operating constantly according to the value.

Another object of the present invention is to install an upstream and downstream silencer plate in the lower silencer, fill the space between the cylindrical lower silencer cylinder with sound-absorbing material, and make holes in the lower silencer surface so that the noise generated by the fan is absorbed by the lower silencer surface. The purpose is to reduce the overall height of the hood by acting as a guide to the inline fan's inlet passage through the lower silencer.

Another purpose of the present invention is to adjust the fan diameter and fan height of the in-line fan module to reduce the rotation speed by an increase in wind volume, ultimately reducing noise and reducing the overall height of the hood.

An in-line fan hood device for achieving the purpose of the present invention is an in-line fan hood device that absorbs odors or harmful substances and heat generated through an in-line hood fan module and discharges them to the outside. The module includes a lower silencer that is connected to the upper part of the hood shade that collects polluted indoor air and absorbs the noise generated by the diagonal fan; A diagonal fan on the top of the lower silencer that is rotated by a motor and forces air to be sucked in; A guide vane connected to the top of the diagonal fan; An upper cylinder of a reducer shape disposed downstream of the guide vane and reducing the flow path area of the fan diameter to the area of the connection bellows for discharging to the outside; A damper connected to the top of the upper cylinder to control the discharge of contaminated air; and a cylindrical silencer formed outside the lower silencer.

Here, the lower silencer has a cylindrical shape with a plurality of perforated holes, and the passage area of the lower silencer expands from the inlet to the inside and then decreases again at the outlet, and the lower silencer is between the lower silencer and the silencer cylinder. It is characterized by being filled with sound-absorbing material from the upstream plate to the downstream plate of the silencer.

In addition, a plurality of perforated holes are formed inside the upper cylinder, and an upper silencer is installed to absorb noise generated from the diagonal flow fan. The inlet part of the upper cylinder is formed by the passage area of the diagonal flow fan, and the upper It is characterized by having a reducer shape where the area becomes narrower toward the top from the inlet to the outlet of the barrel and is connected to the electric damper formed at the end.

In addition, the diagonal fan has a diagonal fan impeller hub and a fan shroud inclined or horizontal in the flow downstream direction, and the outer diameter of the diagonal fan impeller hub is smaller than the inner diameter of the fan shroud, The diagonal fan blade is characterized in that a plurality of main blades and a plurality of auxiliary blades are integrally coupled to the diagonal fan impeller hub and the fan shroud.

An in-line fan hood device control method to achieve another object of the present invention is a motor/damper/lighting control PCB module that receives detection data from a fine dust sensor and a CO2 sensor provided on one side of the hood fan module of a kitchen range hood. A control method for an in-line fan hood device that calculates fine dust concentration values and CO2 concentration values and controls the operation of the fan motor and electric damper built in the hood fan module accordingly to discharge harmful substances and odors to the outdoors. In this case, the motor/damper/lighting control PCB module sets a plurality of standard concentration areas and corresponding standard exhaust effective air volume (Qref) control values according to each standard concentration level value of fine dust and CO2 detection data input by the user. 1st course; A second process of calculating fine dust concentration and CO2 concentration by receiving fine dust and CO2 detection data input through the fine dust sensor and CO2 detection sensor; A third process of comparing the fine dust concentration and CO2 concentration calculated in the second process with the reference concentration area set in the first process to determine a standard exhaust effective air volume (Qref) according to the corresponding concentration area; A fourth process of driving the fan motor at a corresponding rotation speed to generate the effective exhaust air volume (Qref) determined in the third process; And in the fourth process, the fine dust and CO2 concentrations are measured when the fan motor operates, the standard concentration level value set in the first process is changed according to the gradient of the average concentration change in each area, and the exhaust exhaust is effective accordingly. It is characterized by including a fifth process of controlling the fan motor to generate wind volume (Q*).

Here, the first process includes step 11 of inputting initial fine dust and CO2 concentration standard values (P ₁ , P ₂ , P ₃ , P ₄ ,..) (C ₁ , C ₂ , C ₃ ..); Step 12 of setting each concentration area based on the fine dust and CO2 concentration standard values input in step 11; And step 13 of setting the theoretical standard effective air volume (Qref) required in each concentration region set above.

In addition, the 11th step includes at least 3 CO2 concentration standard values (C ₁ , C ₂ , C ₃ ..) and at least 4 fine dust concentration standard values (P ₁ , P ₂ , P ₃ , P ₄ ,..). The individual value input _is set, and the 12 steps are basic ventilation area, intensive ventilation area, maximum ventilation area, low concentration fine dust area, and medium concentration fine dust according to the combination of the set CO2 concentration standard value and fine dust concentration standard value (C _i , P j). It is characterized by classification into dust area and high concentration fine dust area.

In addition, in step 13, if the measured CO2 concentration is below the minimum CO2 concentration standard value (C ₁ ) and the measured fine dust concentration is above the maximum fine dust standard value (P ₄ ), external fine dust does not enter the room due to the hood operation. The operation of the hood is stopped in a clean concentration area where the measured CO2 concentration is below the minimum standard value (C ₁ ) and the fine dust concentration is below the standard (P ₂ ). In cases where the fine dust concentration is fixed and the fine dust concentration increases, or when the fine dust concentration is fixed and the CO2 concentration increases, the level of hood air volume in each concentration area is increased except for cases where the CO2 concentration is below the minimum standard value (C ₁ ). It is characterized by

In addition, the fifth process includes step 21 of calculating indoor pollution concentration (C) over time for each concentration area of fine dust and CO2 detection data measured in the second process; Step 22 of calculating a concentration change slope of the calculated indoor pollution level (C) over time; Step 23 of calculating the actual exhaust effective air volume (Q*) for each concentration region proportional to the concentration change slope; Step 24 of determining the level boundary values (P _lower , P _upper ) and (C _lower , C _upper ) for each concentration region based on the actual exhaust effective air volume (Q*) for each concentration region calculated above; Based on the level boundary values (P _lower , P _upper ) and (C _lower , C _upper ) for each concentration area, fine dust and CO2 concentration level values (P* ₁ , P* ₂ , P* ₃ , P* ₄ , 25 steps to adjust ..,C* ₁ ,C* ₂ ,C* ₃ ,..); Step 26 of repeating steps 21 to 25 until the actual exhaust effective air volume (Q*) approaches the previous reference effective exhaust air volume; And if the actual exhaust effective air volume (Q*) satisfies the previous standard exhaust effective air volume (Qref) in step 26, step 27 of resetting the calculated fine dust and CO2 concentration level values to a new concentration level value. It is characterized by

As described above, the present invention is an inline module with an inline fan (aka diagonal flow type inline fan), an inlet silencer, and an outlet silencer (aka reducer) integrated on the top of the hood collector so that the air flowing in through the hood collector shade has a straight flow path. By installing it, the overall height of the hood is lowered, and the entrance area of the lower silencer installed upstream of the in-line fan is reduced to widen the passage area from the inlet to the downstream. Then, the area of the guide part, which is the silencer outlet, is slightly narrower than the fan inlet, acting as a resonance-type silencer. And the first problem is overcome by making holes in the lower silencer surface to act as a dissipative silencer in which the noise generated by the fan is absorbed by the lower silencer surface. Through the lower silencer, it acts as a guide for the inline fan's inlet flow path, downstream of the inline fan module. The upper silencer acts as a reducer to reduce the area of the hood's upper barrel of the fan diameter to the area of the connection bellows for discharge to the outside, and a damper is installed inside the upper silencer to reduce the damper height, reducing the contaminated air collected through the hood. Due to the height of the hood, it is effective in overcoming the second problem of large static pressure loss due to discharge through a smoothly installed curved pipe.

In addition, when the diameter of the fan is increased, the air volume increases in proportion to the third power of the diameter, but in the case of existing hoods, the diameter of the fan increases in the direction of the hood height and the scroll increases in the same direction, so the overall height of the hood increases, whereas the present invention In the case of an inline fan module, if the fan diameter is increased and the fan height is fixed, the air volume is proportional to the square of the diameter and the static pressure is proportional to the square of the diameter, so the rotation speed is reduced by the increase in wind volume, ultimately reducing noise and increasing the overall hood height. It has the effect of preventing you from losing.

In order for the hood to properly discharge harmful substances and food cooking odors generated during combustion to the outdoors, the hood must operate effectively before the emitted local pollutants mix with indoor air and the hood must be operated at all times even before pollutants are generated. In this case, a large amount of power is consumed, so fine dust and CO2 sensors are used to determine whether indoor pollution requires simple ventilation or pollution due to use of a range. If ventilation emissions are required due to indoor CO2 generation rather than fine dust, BLDC This has the effect of overcoming the fourth problem by minimizing the power consumption due to regular operation by controlling the hood motor to operate at less than 1/2 the rotation speed at the maximum exhaust rate and satisfying the minimum indoor ventilation amount to enable power consumption of less than 10W at all times. there is.

Figure 1 shows a sirocco-type fan (a) used in a hood according to the prior art, a sirocco-type fan casing (b), and a hood duct in the form of a square box with a square inlet and outlet to secure the sirocco-type fan to the hood. schematic diagram representing,
Figure 2 shows that in a chimney-type hood according to the prior art, the air introduced through the hood shade is sucked into the double suction fan through the space between the square duct and the fan casing, and then is drawn to the outside through a reducer-type damper installed at the upper discharge port of the fan casing. Schematic diagram showing discharged streamlines,
Figure 3 shows a structure in which a damper installed downstream of the hood air flow path, i.e., at the top of the hood, in a hood according to the prior art is connected to the outside or a common duct through a duct called a bellows, and at this time is bent at 90 degrees due to constraints in the housing space and is discharged. schematic,
Figure 4 shows that in the case of a conventional hood, the combined height of the hood shade height (H ₁ ), fan scroll height (H ₃ ), and damper height (H ₄ ) is very large, making it impossible to secure a sufficient bellows installation height (H ₅ ). schematic diagram representing,
Figure 5 is a graph showing that in a general fan performance curve, when the diameter is increased at the same rotation speed, the air volume increases in proportion to the third power of the diameter and the static pressure also increases in proportion to the square of the diameter.
Figure 6 is a noise analysis showing that in the case of a square duct with an existing sirocco-type fan, the fan noise is radiated very high in the direction of the hood shade at the bottom of the duct at the fan's blade passing frequency (BPF) and at frequencies two and three times this frequency. result,
Figure 7 is a schematic diagram showing the shapes of the lower silencer and fan installed in the in-line hood according to the present invention;
Figure 8 is a schematic diagram showing the shape of an upper silencer with a built-in damper installed in an in-line hood according to the present invention;
Figure 9 is a schematic diagram showing an embodiment of a fan module installed in an in-line hood according to the present invention;
Figure 10 is a schematic diagram showing that air introduced through the hood shade in the in-line hood according to the present invention is discharged in an almost straight streamline through the lower silencer, fan blade, guide vane, upper silencer reducer, and damper;
Figure 11 is a schematic diagram showing the hood shade height (H ₁ ), lower silencer height (H ₂ ), impeller-guide vane height (H ₃ ), and upper silencer height (H ₄ ) of the in-line hood, which is an embodiment of the present invention;
A duty control graph showing the wet bulb temperature of the air mixed with the air passing through the heater and the leaking air when the duty for each section changes for clothes of the standard weight set to 70 minutes of drying time,
12 is a schematic diagram showing a cross-sectional view of an in-line fan module according to an embodiment of the present invention;
13 is a schematic diagram showing a part diagram of an in-line hood fan module according to an embodiment of the present invention;
Figure 14 is a graph showing changes in concentration measured by the fine dust sensor and CO2 sensor when operating the in-line hood according to an embodiment of the present invention;
Figure 15 is a schematic diagram showing a fine dust and CO2 concentration sensor measuring unit according to an embodiment of the present invention.
Figure 16 is a diagram showing a map for controlling fan rotation speed according to fine dust and CO2 concentration according to an embodiment of the present invention.
Figure 17 is a graph predicting concentration change over time at a given ventilation amount according to an embodiment of the present invention.
Figure 18 is a flowchart showing an algorithm for automatically changing the control level value for each area of the concentration control map according to the installation environment or operating environment according to an embodiment of the present invention.
Figure 19 is a schematic configuration diagram of a fan hood control device for implementing Figure 18.

The present invention will become more apparent by detailed description of preferred embodiments of the present invention with reference to the accompanying drawings. Additionally, in order to aid understanding of the invention, the attached drawings are not drawn to actual scale and the dimensions of some components may be exaggerated.

Hereinafter, an in-line fan hood device and its control method according to an embodiment of the present invention will be described in detail with reference to FIGS. 7 to 16.

First, referring to FIGS. 11 and 12, the in-line kitchen hood includes a hood shade (1) that collects polluted indoor air through a filter (not shown), and a lower silencer cylinder perpendicular to the top of the hood shade (1). (10) is connected, and the lower silencer (16) formed inside the lower silencer cylinder (10) has a passage area that expands from the inlet to the inside of the lower silencer and then decreases again at the lower silencer outlet ring (15), which is the outlet of the lower silencer. It is formed as a resonance type silencer where the area of the guide part is slightly narrower than the inlet part of the fan. At this time, the outer diameter of the outlet inlet guide of the lower silencer 16 is slightly smaller than the outer diameter of the inlet part of the fan, so it is arranged to slightly overlap in the axial direction when the fan rotates.

A lower silencer upstream plate 11 and a downstream plate 12 are installed at the upper and lower ends of the lower silencer 16, and the cylindrical silencer cylinder 10 is filled with the lower silencer sound absorbing material 13 and the lower silencer 16 surface. A perforated hole (17) is formed so that the noise generated by the fan is absorbed by the lower silencer surface.

A guide vane cylinder (30) is connected to the top of the silencer cylinder (10), and inside it, the outlet ring (15) of the lower silencer (16) and the impeller inlet ring (21) overlap and are seated in the motor installation cylinder (32). A diagonal flow fan (20) driven by a fan motor (33) and a guide vane (31) installed at the fan outlet are formed, which are disposed downstream of the guide vane barrel (30) and discharge to the outside in a passage area of the fan diameter. It acts as a reducer to reduce the area of the connection bellows, and an electric damper (43) is installed inside to discharge the collected polluted air to the outside.

The guide vane 31 has an inlet angle of the guide vane 31 so as to recover the rotational energy of the diagonal flow type fan 20 into static pressure energy, and has a rotation direction angle similar to the absolute wake speed of the fan, and the outlet is inline and straight. It is formed to extend outwards toward the inside of the in-line hood fan module tube in the inner circumferential direction of the guide vane tube 30 with the same pitch or an unequal pitch to reduce discrete noise.

An upper silencer (41) with a perforated hole (41a) is installed on the inner surface of the upper cylinder (40) to absorb noise generated by the diagonal fan (20), between the upper cylinder (40) and the upper silencer (41). The upper silencer is filled with sound-absorbing material (44) to absorb noise.

Referring to FIG. 7, the diagonal flow fan 20 is fixed to the upper side of the lower silencer 16 by combining the lower silencer outlet ring 15 and the impeller inlet ring 21 of the diagonal flow fan 20. The wings 23 are formed between the fan impeller hub 22 and the fan shroud 24, and the fan shroud 24 has a plurality of main wings and a plurality of auxiliary wings connected to the fan impeller hub. (22) and the fan shroud (24).

The diagonal fan impeller hub 22 and the fan shroud 24 are formed inclined or horizontal in the flow downstream direction, and the outer diameter of the diagonal fan impeller hub 22 is formed to be smaller than the inner diameter of the fan shroud 24. .

Referring to FIG. 8, downstream of the in-line hood fan module, the upper silencer (41) has a bellows connection portion (42) for discharging to the outside in FIG. 3 in the area of the hood upper barrel (40) with the diameter of the diagonal fan (20). It acts as a reducer to reduce the area, and a damper is installed inside the upper silencer to reduce the separate damper height (H ₄ ) shown in Figure 4, so that the contaminated air collected through the hood flows through a curved pipe smoothly installed at the lowered hood height. It can solve the problem of large static pressure loss due to discharge.

In addition, as shown in the performance curve of the fan shown in Figure 5, when the diameter of the fan is increased, the air volume is proportional to the third power of the diameter and the static pressure also increases in proportion to the square of the diameter. However, in the case of an existing hood, the diameter of the fan is proportional to the hood height. direction and the scroll increases in the same direction, thereby increasing the overall height of the hood. However, in the case of the in-line hood fan module 50 of the present invention shown in Figure 9, if the fan diameter is increased and the fan height is fixed, the air volume increases with the diameter. Since it is proportional to the power of 2, and static pressure is also proportional to the square of the diameter, the number of rotations is reduced by the amount of increase in wind volume, which ultimately reduces noise and overcomes the third problem of increasing the overall height of the hood.

Referring to FIGS. 15 and 19, fine dust and CO2 sensors 51 and 52 are installed outside the in-line hood fan module 50, and a touch-type LED display is provided on the front of the hood shade 1, Inside, a motor/damper/lighting control system receives signals from the fine dust and CO2 sensors 51 and 52 and controls the operation of the fan motor 33 and the electric damper 43 installed in the hood fan module 50. It consists of a PCB module (60).

The specific operation process of the in-line kitchen hood configured as described above will be described in detail with reference to FIGS. 18 and 19 as follows.

Fine dust concentration value and CO2 concentration value from the motor/damper/lighting control PCB module 60 that receives the detection data from the fine dust sensor and CO2 sensor 51 and 52 provided on one side of the hood fan module 50. is calculated, and the operation of the fan motor 33 and the electric damper 43 built in the hood fan module is controlled accordingly to discharge harmful substances, heat, and odor to the outdoors. This can be set to always operate at times other than the operation time of the range hood function that is activated when cooking food.

More specifically, during artificial intelligence automatic operation using fine dust sensors and CO2 sensors (51) (52), the power consumption of the fan is proportional to the cube of the number of rotations, so constant ventilation is required by indoor CO2 generation rather than fine dust by not using a range. If necessary, the fan motor 33 increases or decreases according to the CO2 concentration, but operates at less than 1/2 of the maximum rotation speed of the motor corresponding to the maximum wind volume, while satisfying the minimum indoor ventilation amount and CO2 concentration standard values (C ₁ , C ₂ , C ₃ ..) uses at least 3 values, and fine dust PM 2.5μg/m ³ concentration standard values (P ₁ , P ₂ , P ₃ , P ₄ ,..) use at least 4 values to determine the CO2 concentration standard value and fine dust concentration standard value. Depending on the combination (C _i , P _j ), the air volume is controlled by the basic ventilation area, intensive ventilation area, maximum ventilation area, low concentration fine dust area, medium concentration fine dust area, high concentration fine dust area, and a combination of these. Since the exhaust air volume varies even for the same fan rotation speed depending on the environment, the measurement reference level values (C ₁ , C ₂ , C ₃ ..) and (P ₁ , P ₂ , P ₃ , P ₄ ,..) are automatically changed and controlled.

In other words, when outdoor air or unpolluted air quantity Q is supplied to a space whose volume is given as V _o , the indoor pollution concentration C increases from the initial concentration value C _o over time as shown in FIG. 17. relationship changes. Also, if we differentiate this with time, we get the following relationship:

In other words, the gradient of concentration change is proportional to the air supply quantity Q. Therefore, the representative air volume of the combinations of (C _i , P _j ) in each area of Figure 16 according to the installation environment is as shown in the equation below when operating in that area. It can be obtained by averaging the values.

Based on this, the purity for calculating the level value for each control concentration area is as shown in FIG. 18. That is, the initial fine dust and CO2 concentration level values (P ₁ , P ₂ , P ₃ , P ₄ ,.., C ₁ , C ₂ , C ₃ ,..) are entered. Based on this, the theoretical air volume Q A-1,..Q E-7.. required in each concentration area (A _-1 ,.. _E-7 ,..) is set. Since the exhaust air volume changes depending on the installation environment, dC/dt measurement for each concentration area is performed every time the hood is operated. Get the value.

Based on this, the actual exhaust effective air volume Q* _A-1 ,..Q* _E-7 .. for each concentration area is calculated. Again, based on Q* _A-1 ,..Q* _E-7 .., Domain (P _lower , P _upper ), (C _lower , C _upper ) for each concentration area is re-determined. That is, at this time, if Q * _{A- 1} is calculated lower than Q A-1 (P _lower , P _upper ), (C _lower , C _upper ) level values are in the lower left direction as shown by the dotted line in the concentration area map of FIG. 16. It moves to , and the detailed level movement width can be obtained by dividing the concentration area again to optimally obtain the movement width in detail or using a deep learning algorithm. In this case, unlike the map in Figure 16, (P _lower , P _upper ) and (C _lower , C _upper ) do not match for each area, so groups belonging to the same row and column have the same level value. Therefore, select the optimal value so that the (P _lower , P _upper ) level values of the same row match and (C _lower , C _upper ) of the same column match. After this process, if the discriminant below is satisfied, the fine dust and CO2 concentration level values (P ₁ , P ₂ , P ₃ , P ₄ ,.., C ₁ , C ₂ , C ₃ ,..) for each area are reset. If not, the re-adjustment routine is repeated.

As an example, the change in concentration measured by the fine dust sensor and CO2 sensor by controlling the in-line hood is shown in FIG. 14.

As described above, although the present invention has been described by means of limited embodiments and drawings, it is not limited by these embodiments, and the technical idea of the present invention and the following will be described by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the patent claims.

1: Hood lampshade
10: Silencer cylinder 11: Lower silencer upstream plate
12: Lower silencer downstream plate 13: Lower silencer sound absorbing material
14: Lower silencer inlet guide ring 15: Lower silencer outlet ring
16: Lower silencer 17: Perforated hole
20: diagonal fan 21: impeller inlet ring
22: servo fan impeller hub 23: servo fan wing
24: Fan shroud 30: Guide vane barrel
31: Guide vane 32: Motor mounting barrel
33: Fan motor 34: Motor bracket
40: upper cylinder 41: upper silencer
41a: Perforated hole 42: Bellows connection part
43: Electric damper 44: Upper silencer sound absorbing material
50: Hood fan module
51: fine dust sensor 52: CO2 sensor
60: Motor/damper/lighting control PCB module

Claims (5)

The fine dust concentration value and CO2 concentration value are calculated from the motor/damper/lighting control PCB module that receives the detection data from the fine dust sensor and CO2 sensor provided on one side of the hood fan module of the kitchen range hood, and the hood fan module calculates the fine dust concentration value accordingly. In the control method of an in-line fan hood device that discharges harmful substances and odors to the outdoors by controlling the operation of the fan motor and electric damper built in,
The motor/damper/lighting control PCB module is a first module that sets a plurality of standard concentration areas and corresponding standard exhaust effective air volume (Qref) control values according to each standard concentration level value of fine dust and CO2 detection data input by the user. procedure;
A second process of calculating fine dust concentration and CO2 concentration by receiving fine dust and CO2 detection data input through the fine dust sensor and CO2 detection sensor;
A third process of comparing the fine dust concentration and CO2 concentration calculated in the second process with the reference concentration area set in the first process to determine a standard exhaust effective air volume (Qref) according to the corresponding concentration area;
A fourth process of driving the fan motor at a corresponding rotation speed to generate the standard exhaust effective air volume (Qref) determined in the third process; and
In the fourth process, the concentration of fine dust and CO2 is measured when the fan motor operates, the standard concentration level value set in the first process is changed according to the gradient of the average concentration change in each area, and the actual exhaust effect is determined accordingly. Including a fifth process of controlling the fan motor to generate wind volume (Q*),
The first process includes 11 steps of inputting initial fine dust and CO2 concentration standard values (P ₁ , P ₂ , P ₃ , P ₄ ,..) (C ₁ , C ₂ , C ₃ ..);
Step 12 of setting each concentration area based on the fine dust and CO2 concentration standard values input in step 11; and
A control method of an in-line type fan hood device, comprising: 13 steps of setting the theoretical standard exhaust effective air volume (Qref) required in each concentration region set above. delete According to paragraph 1,
In step 11, enter at least 3 values for the CO2 concentration standard values (C ₁ , C ₂ , C ₃ ..) and at least 4 values for the fine dust concentration standard values (P ₁ , P ₂ , P ₃ , P ₄ ,..) set,
The 12 steps are basic ventilation area, intensive ventilation area, maximum ventilation area, low concentration fine dust area, medium concentration fine dust area, and high _{concentration} fine dust according to the combination of the set _CO2 concentration standard value and fine dust concentration standard value (C i, P j). A control method for an in-line fan hood device characterized by classification into dust areas. According to paragraph 1,
In step 13, if the measured CO2 concentration is below the minimum CO2 concentration standard value (C ₁ ) and the measured fine dust concentration is above the maximum fine dust standard value (P ₄ ), the hood is activated to prevent external fine dust from entering the room through hood operation. stop driving,
The hood operation is stopped in a clean concentration area where the measured CO2 concentration is below the minimum standard value (C ₁ ) and the fine dust concentration is below the standard (P ₂ ),
When the CO2 concentration is fixed and _the fine dust concentration increases, or when the fine dust concentration is fixed and the CO2 concentration increases, the hood air volume in each concentration area is A control method of an in-line fan hood device characterized by increasing steps. The fine dust concentration value and CO2 concentration value are calculated from the motor/damper/lighting control PCB module that receives the detection data from the fine dust sensor and CO2 sensor provided on one side of the hood fan module of the kitchen range hood, and the hood fan module calculates the fine dust concentration value accordingly. In the control method of an in-line fan hood device that discharges harmful substances and odors to the outdoors by controlling the operation of the fan motor and electric damper built in,
The motor/damper/lighting control PCB module is a first module that sets a plurality of standard concentration areas and corresponding standard exhaust effective air volume (Qref) control values according to each standard concentration level value of fine dust and CO2 detection data input by the user. procedure;
A second process of calculating fine dust concentration and CO2 concentration by receiving fine dust and CO2 detection data input through the fine dust sensor and CO2 detection sensor;
A third process of comparing the fine dust concentration and CO2 concentration calculated in the second process with the reference concentration area set in the first process to determine a standard exhaust effective air volume (Qref) according to the corresponding concentration area;
A fourth process of driving the fan motor at a corresponding rotation speed to generate the standard exhaust effective air volume (Qref) determined in the third process; and
In the fourth process, the concentration of fine dust and CO2 is measured when the fan motor operates, the standard concentration level value set in the first process is changed according to the gradient of the average concentration change in each area, and the actual exhaust effect is determined accordingly. Including a fifth process of controlling the fan motor to generate wind volume (Q*),
The fifth process includes step 21 of calculating indoor pollution concentration (C) over time for each concentration area of fine dust and CO2 detection data measured in the second process;
Step 22 of calculating a concentration change slope of the calculated indoor pollution level (C) over time;
Step 23 of calculating the actual exhaust effective air volume (Q*) for each concentration region proportional to the concentration change slope;
Step 24 of determining the level boundary values (P _lower , P _upper ) and (C _lower , C _upper ) for each concentration region based on the actual exhaust effective air volume (Q*) for each concentration region calculated above;
Based on the level boundary values (P _lower , P _upper ) and (C _lower , C _upper ) for each concentration area, fine dust and CO2 concentration level values (P* ₁ , P* ₂ , P* ₃ , P* ₄ , 25 steps to adjust ..,C* ₁ ,C* ₂ ,C* ₃ ,..);
Step 26 of repeating steps 21 to 25 until the actual exhaust effective air volume (Q*) approaches the previous reference effective exhaust air volume (Qref); and
In step 26, if the actual exhaust effective air volume (Q*) satisfies the previous standard exhaust effective air volume (Qref), step 27 of resetting the calculated fine dust and CO2 concentration level values to a new concentration level value; A control method of an in-line fan hood device, characterized in that.