KR102547186B1 - Safety system to prevent harmful cooking fumes in the kitchen with air emission control function - Google Patents

Abstract

The present invention relates to a safety system for preventing harmful effects of cooking fume in a cooking area having an air emission control function, and particularly, at least one hood for collecting cooking fume; an exhaust duct for collecting polluted air collected through the hoods; an exhaust blower for forcibly discharging air including cooking fume in the cooking area through a chimney; Harmful substance detection sensors for detecting concentrations of various harmful substances discharged during cooking through cookers; and a control unit that compares the concentration of various harmful substances detected by the harmful substance detection sensor with reference values for various harmful substances stored therein, and controls the number of revolutions of the exhaust blower in response to the resultant value. Including, dampers whose opening and closing amounts are controlled by electronic valves for controlling air discharge are installed on the outlet side of the hoods, and the opening and closing amounts of the dampers are detected by harmful substance detection sensors installed in each hood. It includes being controlled by a driving signal output from the control unit in response to a difference between the concentration value of the harmful substance and the reference value for each harmful substance.
Therefore, it is possible to drastically improve the air quality in the kitchen and automatically create a pleasant indoor air quality environment, which can cause lung cancer and other diseases that can be caused by continuous inhalation of cooking fume containing various harmful substances above the standard amount by people working in the kitchen. Industrial accidents can be prevented in advance.

Description

Safety system to prevent harmful cooking fumes in the kitchen with air emission control function}

The present invention relates to a safety system for preventing harmful effects of cooking fume in a kitchen with an air emission control function, and more particularly, to a safety system for preventing harmful effects of cooking fumes in a cooking space including a kitchen (Cooking Fume; Polluted air containing various harmful gases and fine dust) is automatically discharged to the outside smoothly, and a pleasant indoor air quality environment is automatically created through forced inflow of outdoor air or ventilation, so that people working in the cooking space are free from various harmful substances. Industrial accidents such as lung cancer that may occur due to cooking fumes can be prevented in advance, and harmful cooking fumes in the kitchen with an air emission control function invented to discharge cleaner air to the outside through an air purifier. It is about an anti-safety system.

In general, in cooking spaces (hereinafter collectively referred to as "cooking grounds") including large kitchens such as various restaurants, schools, and corporations that cook meat and fish, Chinese food, and fried food, steam and cooking fumes (food Various harmful substances, including harmful gases and fine substances generated when frying or baking while cooking, etc.) are generated in large quantities, and indoor air pollution is becoming a problem.

These steams and cooking fumes are the main components of fats and fatty acids generated when meat or fish are grilled or fried, odorous substances with an amine group, which is the main component of fishy smell, ethyl alcohol used as a meat tenderizer, and various spices and cooking materials. Aromatic hydrocarbons including volatiles, carcinogens such as benzopyrene and formaldehyde generated when heated and carbonized, nitrogen oxides (NOx), and carbon monoxide (CO) burned carbon dioxide (CO2) and combustible ash (fly ash) ) and a mixed gas in which ultrafine dust is mixed with air and water vapor.

Indoor air pollution caused by algae fumes generated in the kitchen must be removed because it not only causes odors but also adversely affects the human body.

Therefore, the International Cancer Organization also classifies such cooking fume as a carcinogenic substance, and accordingly, the government also recognizes it as an industrial accident when workers in a kitchen working in an environment exposed to cooking fumes develop lung cancer.

On the other hand, as a method of controlling indoor air pollution, a method of controlling through ventilation is usually used. As such a ventilation method, a natural ventilation method is used from an economical point of view, but it is classified as a very inefficient method because ventilation must be performed periodically and energy consumption increases to maintain indoor temperature.

In addition, mechanical ventilation methods are used. The mechanical ventilation method uses an exhaust duct and an exhaust blower to forcibly discharge polluted indoor air to the outside through the exhaust duct.

However, the exhaust blower used in most conventional mechanical ventilation methods is configured to be driven at a certain number of revolutions (maximum number of revolutions) regardless of the level of air pollution caused by harmful substances generated during cooking in the kitchen, so the air pollution level is low. Since it is driven at the maximum number of revolutions, there is a problem in that unnecessary noise and energy loss occur.

In addition, the exhaust blower is operated at the maximum rotation speed unconditionally without consideration for the size of the kitchen or the region where pollution occurs intensively, and of course, the automatic supply of outside air is not made in preparation for the insufficient amount of indoor air due to exhaustion. There is also a problem that a pleasant indoor air quality environment for the entire kitchen cannot be created.

In addition, in the process of discharging indoor polluted air through the exhaust duct, vapors of fatty acids with high boiling points are condensed on the inner wall of the duct inlet and the blades of the blower and hardened, and water vapor is condensed at the outlet and flows down as condensed water.

And, the remaining steam, volatile organic compounds, volatile substances, and carbon monoxide are discharged as they are.

As a result, it causes people in the area around the restaurant to feel uncomfortable due to the odor and the resulting physical reaction (headache, nausea, vomiting, etc.), causing civil complaints related to the odor.

In addition to these methods, attempts have been made to remove odor-causing substances and various harmful substances contained in exhaust gas generated in various restaurants using filtering agents, dehumidifying agents, selective plants, and filters, but the removal efficiency of harmful substances is still high. There was a limit to raising .

In addition, the exhaust system of most conventional kitchens adopts a method of filtering out various harmful substances contained in the polluted air in the kitchen through a replaceable filter installed in the hood, so that various harmful substances contained in the air discharged to the outside The purification efficiency of the filter is very low, and filters composed of non-woven fabric are clogged by various foreign substances in a short time and require frequent replacement, which requires a lot of time and cost for maintenance and causes environmental pollution due to discarding the filter. there was a problem with

Accordingly, it is possible to more effectively remove odor-inducing gas included in exhaust gas generated in various restaurants and cooking fumes including various harmful substances and fine dust, and in addition, the quality of the air finally discharged to the outside can be improved. There is an urgent need for technological development that can improve.

Domestic Patent Publication No. 10-2018-0081343 (July 16, 2018) Domestic Patent Registration No. 10-2363298 (February 10, 2022)

The present invention has been made to solve these conventional problems, and the concentration of various harmful substances included in cooking fumes generated when cooking various foods in a kitchen is detected by installing a hood. It detects through sensors and automatically controls the number of rotations of the exhaust blower in response to the difference between the detection concentration value of various harmful substances and the management standard value. In response to the amount of emissions, the rotation speed of the intake blower is controlled to forcibly introduce an appropriate amount of fresh outdoor air. Through this method, the air quality in the kitchen is greatly improved and a pleasant indoor air quality environment is automatically created. A safety system for preventing harm from cooking fume in the kitchen with an air emission control function that can prevent industrial accidents such as lung cancer that can be caused by continuous inhalation of cooking fumes containing various harmful substances beyond the standard amount. Its purpose is to provide

Another object of the present invention is to install a liquid filter type air purifier that uses sodium hypochlorite between an exhaust blower and a chimney to perform a purification function for various harmful substances contained in polluted air being exhausted, Not only can clean air be discharged, but it can significantly reduce the time and cost of system management and repair, and has an air emission control function that can minimize the cause of environmental pollution caused by filter waste. Harmful to cooking fumes in the kitchen It is to provide an anti-safety system.

Another object of the present invention is to further install dampers on the outlet side of the hoods, and compare the concentration values of hazardous substances around the hood detected by the harmful substance detection sensors installed in each hood to the reference value for each harmful substance and A method of adjusting the amount of opening and closing of the dampers in response to the difference in the number of cookers, that is, by opening a lot of dampers on the side of the hood where a lot of harmful substances are generated and opening small dampers on the side of the hood where a lot of harmful substances are generated. To provide a safety system for preventing harm from cooking fumes in a kitchen with an air emission control function that can prevent unnecessary noise and power consumption caused by an unnecessarily high rotational speed of an exhaust blower despite different emissions of harmful substances. there is.

Another object of the present invention is to further install an air curtain between the hoods that can prevent various harmful substances discharged during cooking through the cooker from rising toward the ceiling through the space between the corresponding hoods, thereby reducing harmful substances. It is an object of the present invention to provide a safety system for preventing harm from cooking fumes in a kitchen with an air emission control function capable of significantly improving efficiency according to emission.

Another object of the present invention is to store the rotation speed of the exhaust blower as well as the concentration values of various harmful substances detected through the harmful substance detection sensor installed in each hood in real time in a data storage unit, and at the same time display it on a display unit or monitor. It can be displayed or printed through a printer, so that the manager can accurately check the exhaust status as well as the contamination status around each cooker in the corresponding kitchen. To provide a safety system for preventing harmful cooking fumes in the kitchen with an air emission control function. there is.

Another object of the present invention is to detect concentration values of hazardous substances and artificial intelligence (AI) for each hood stored in a data storage unit at a predetermined time or when managers want or when a problem occurs in the system. The average detection value of harmful substances in the kitchen and the rotation speed value of the exhaust blower for each hour of the day calculated by using It is to provide a safety system for preventing harm from cooking fume in the kitchen with an air emission control function that accurately recognizes the status information of the discharge system even in a remote location and can quickly and accurately take necessary measures when a special condition occurs.

Other detailed objects of the present invention will be clearly identified and understood by experts or researchers in the art through the specific contents described below.

One embodiment of the safety system for preventing harm from cooking fumes in a kitchen having an air emission control function of the present invention for achieving the above object is the safety system for preventing harm from cooking fumes in a kitchen having an air emission control function. at least one hood that is fixed to an upper ceiling and collects cooking fumes containing harmful substances; at least one middle exhaust duct having one end coupled to each hood outlet and the other end connected to the exhaust duct; an exhaust duct installed to pass through one side of the cooking area and collecting and transferring cooking fumes that are collected through the hoods and transported through the intermediate exhaust ducts to a side of an exhaust blower; an exhaust blower installed at an end of the exhaust duct, operating at a rotational speed corresponding to the driving signal of the control unit, and forcibly discharging air including cooking fume in the kitchen through a chimney; harmful substance detection sensors installed in the hoods and detecting concentrations of various harmful substances discharged through cookers during cooking; A control unit that compares the concentration of various harmful substances detected by the harmful substance detection sensor with reference values for various harmful substances stored therein, and controls the number of revolutions of the exhaust blower in response to the resultant value. It is characterized by including.

In addition, an intake duct is installed to pass through the other side of the cooking area in the cooking area and guides external air to flow into the cooking area; and installed at an outer or inner end of the intake duct, the number of rotations being controlled in response to an output signal of the control unit, and the air in the cooking area discharged to the outside and the outside air corresponding to the amount of cooking fume are introduced into the cooking area through the intake duct. It further includes being equipped with; a blower for intake to be introduced.

In addition, it is installed between the exhaust blower and the chimney, and the polluted air that is forcibly discharged from the kitchen by the exhaust blower passes through a specific aqueous solution stored therein, and various harmful gases and harmful substances contained in the contaminated air are passed through. An air purifier that allows substances, oil vapors, and odors to be water-soluble and deodorized.

In addition, the air purifier may include one or more continuously installed in series between the exhaust blower and the chimney.

In addition, the specific aqueous solution is characterized in that it contains sodium hypochlorite (NaOCl) having a predetermined hydrogen ion concentration index (pH) value (for example, pH 7-8).

In addition, the air purifier includes sodium hypochlorite supply means for generating or receiving sodium hypochlorite (NaOCl) having a predetermined pH value and supplying it to the septic tank; A polluted air inlet and a purified air outlet are provided on the upper surface, and various harmful substances contained in the polluted air sent from the kitchen in a state in which an appropriate amount of sodium hypochlorite solution is supplied from the sodium hypochlorite supply means are removed from the sodium hypochlorite solution. A septic tank to be water-soluble and deodorized in the process of passing in an aerated form; at least one polluted air supply nozzle having a plurality of polluted air injection nozzles and injecting polluted air in the kitchen discharged through the exhaust blower into the sodium hypochlorite solution in the septic tank; at least one water level detection sensor for detecting a water level in the septic tank; And a pH detection sensor for detecting the pH concentration of the sodium hypochlorite solution in the septic tank; including, wherein the control unit detects that the water level in the septic tank detected by the water level detection sensor is below a predetermined lower limit or is oxidized by contaminants to pH When the concentration is lowered below the predetermined concentration, the sodium hypochlorite supply pump provided in the sodium hypochlorite supply means maintains the water level in the septic tank at the predetermined level, as well as the pH concentration of the sodium hypochlorite solution at the predetermined concentration. including keeping

In addition, the lower surface of the septic tank is formed to be inclined from one side to the other side, and a drain valve is further installed on the bottom of the other side of the septic tank.

In this case, the drain valve may include a manual valve or an electromagnetic valve.

In addition, a water pollution detection sensor is further installed in the septic tank, and in a state where an electromagnetic valve is installed as the drain valve, the control unit causes the contamination level of the sodium hypochlorite solution in the septic tank detected through the water pollution detection sensor ( PPM) may further include opening the drain valve for a predetermined period of time so that the sludge precipitated on the bottom of the septic tank and a part of the contaminated sodium hypochlorite solution are automatically discharged to the outside.

Further, the exhaust blower or the intake blower includes controlling the number of revolutions by the control unit through phase control, frequency/voltage (F/V) control, or pulse width modulation (PWM) control.

In addition, as the harmful substance detection sensor, at least one of a carbon monoxide detection sensor, a carbon dioxide detection sensor, a fine dust detection sensor, and an electrochemical formaldehyde sensor is installed.

In addition, dampers whose opening and closing amounts are controlled by electromagnetic valves for controlling air discharge are further installed on the outlet side of the hoods, and the opening and closing amounts of the dampers are harmful around the hoods detected by harmful substance detection sensors installed in each hood. It is characterized in that it is controlled by a driving signal output from the control unit in response to a difference between a substance concentration value and a reference value for each harmful substance.

In addition, bellows are further installed between the hoods and the exhaust duct, lifting means are further installed between the upper surfaces of the hoods and the ceiling, and the control unit controls the air around a specific cooker through the harmful substance detection sensor. As a result of detecting the contaminant concentration, if the concentration of any one contaminant among the pollutants to be detected rises above the set management standard, the lifting means is operated to automatically lower the hood above the cooker by the set height characterized by one.

In addition, the whole or front surface of the hood is formed of a transparent member so that the exhaust state of the cooking fume can be visually confirmed.

In addition, an air curtain may be further installed between the hoods to prevent various harmful substances discharged during cooking through the cooker from rising toward the ceiling through the space between the corresponding hoods.

In addition, the control unit stores the number of rotations of the exhaust blower operating in response to the concentration values of various harmful substances as well as the concentration values of various harmful substances detected through the harmful substance detection sensors installed in each hood to the data storage unit. It further includes storing in real time.

In addition, the control unit graphs the concentration values of various harmful substances detected in each hood as well as the number of revolutions of the exhaust blower operating in response to the concentration values of the various harmful substances on a display unit installed in the corresponding kitchen in real time. Alternatively, it may further include displaying in the form of numbers or tables.

In addition, the control unit, if desired by the manager, calculates the average detection value of harmful substances in the kitchen calculated using artificial intelligence (AI) and the detection concentration value of harmful substances for each time zone in each hood stored in the data storage unit, and It may further include displaying or printing the rotation speed value for each time period of the exhaust blower whose rotation speed is controlled in correspondence with a graph, number, or table form through a monitor or printer.

In addition, the control unit calculates the average detection value of harmful substances in the kitchen calculated using artificial intelligence (AI) and the concentration value of harmful substances detected for each time zone in each hood stored in the data storage unit, and the number of revolutions corresponding thereto. The controlled number of rotations of the exhaust blower for each time period is transmitted through a two-way communication unit at a set time or when managers want or when a problem related to cooking fume emission occurs, a remote manager computer or server or a safety system for preventing harmful cooking fumes. It may further include transmitting to an administrator terminal in which a management app (APP) is installed.

On the other hand, prior to this, the terms or words used in the claims for patent registration should not be construed as being limited to the usual or dictionary meaning, and the inventors should not interpret the concept of terms in order to explain their invention in the best way. It should be interpreted as a meaning and concept consistent with the technical spirit of the present invention based on the principle that can be properly defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all of the technical ideas of the present invention, so that various alternatives can be made at the time of this application. It should be understood that there may be equivalents and variations.

As described above, according to the safety system for preventing harm from cooking fume in a kitchen having an air emission control function of the present invention, the concentration of various harmful substances included in cooking fumes generated when heating and cooking various foods in a kitchen is detected through the harmful substance detection sensor installed in the hood, and cooking fume is automatically discharged to the outside smoothly through a method of automatically controlling the rotation speed of the exhaust blower in response to the difference between the detection concentration value of various harmful substances and the management standard value. In addition, in response to the discharge of polluted air in the kitchen, the rotation speed of the intake blower is controlled to forcibly introduce an appropriate amount of fresh outdoor air, which significantly improves the air quality in the kitchen and automatically creates a pleasant indoor air quality environment. Through this method, there is an effect of preventing industrial accidents such as lung cancer that may be caused by continuously inhaling cooking fume containing various harmful substances in excess of a standard amount by people working in the kitchen.

In addition, according to the safety system for preventing harm from cooking fume in a kitchen having an air emission control function of the present invention, sodium hypochlorite is used between the exhaust fan and the chimney to purify various harmful substances contained in the polluted air being exhausted. By installing a liquid filter type air purifier that performs air purification, it is possible not only to discharge cleaner air to the outside, but also to significantly reduce the time and cost of system management and repair, and to reduce the cause of environmental pollution caused by filter waste. There is an effect that can be minimized.

In addition, according to the safety system for preventing harm from cooking fumes in a kitchen having an air discharge control function of the present invention, dampers are further installed on the outlet side of the hoods, and the corresponding hood detected by the harmful substance detection sensors installed in each hood A method of adjusting the amount of opening and closing of the dampers in response to the difference between the reference value for each harmful substance compared to the concentration value of the surrounding harmful substances, that is, the dampers on the side of the hood where a lot of harmful substances are generated are opened a lot and the harmful substances are relatively small By allowing the hood-side dampers to be opened small, unnecessary noise and power consumption caused by unnecessarily high rotational speed of the exhaust blower can be prevented in advance despite the difference in the emission of harmful substances by different cookers. It works.

In addition, according to the safety system for preventing harm from cooking fume in a kitchen having an air emission control function according to the present invention, various harmful substances discharged during cooking through a cooker between hoods rise toward the ceiling through the space between the hoods. By further installing an air curtain that can prevent this, there is an effect of significantly improving the efficiency of discharging harmful substances.

In addition, according to the safety system for preventing harm from cooking fume in a kitchen having an air emission control function according to the present invention, the concentration values of various harmful substances detected through the harmful substance detection sensor installed in each hood as well as the number of rotations of the exhaust blower stored in the data storage unit in real time, displayed on the display unit or monitor, or printed through a printer, so that the manager can accurately check (monitor) the exhaust status as well as the contamination status around each cooker in the corresponding kitchen. There are possible effects.

Furthermore, according to the safety system for preventing harm from cooking fumes in a kitchen having an air emission control function according to the present invention, each hood stored in the data storage unit at a predetermined time or when administrators desire or when a problem occurs in the system The average detection value of harmful substances in the kitchen calculated using artificial intelligence (AI) and the concentration value of hazardous substances detected by time in By enabling the cooking fumes harmful prevention safety system management application (APP) to be transmitted to the administrator terminal installed, it is possible to accurately recognize the status information of the discharge system even from a remote location and take necessary actions quickly and accurately when a special condition occurs, thereby improving system management. It is a very useful invention, such as greatly improving reliability according to the present invention.

Other effects of the present invention will be clearly identified and understood by experts or researchers in the art through the specific details described below or during the process of implementing the present invention.

1 is a schematic configuration diagram of a safety system for preventing harm from cooking fumes in a kitchen having an air emission control function to which an embodiment of the present invention is applied.
Figure 2 is a schematic configuration diagram of a safety system for preventing harm from cooking fumes in a kitchen having an air discharge control function to which another embodiment of the present invention is applied.
3 is a schematic enlarged cross-sectional view of an air purifier of the present invention.
4 is an enlarged view of a coupled state of a hood and an elevating means applied in another embodiment of the present invention.
5 is an electrical block diagram of a safety system for preventing harm from cooking fumes in a kitchen having an air discharge control function according to the present invention.

Since the present invention can have various changes and various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features or It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, the operating state according to each configuration, including a preferred embodiment according to the present invention, will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a safety system for preventing harmful effects of cooking fume in a kitchen having an air emission control function to which an embodiment of the present invention is applied, and FIG. 2 is a kitchen with an air emission control function to which another embodiment of the present invention is applied. A schematic configuration diagram of a safety system for preventing harm from cooking fumes is shown, and FIG. 3 is a schematic enlarged cross-sectional view of an air purifier of the present invention.

In addition, Figure 4 is an enlarged view of the coupled state of the hood and the lifting means applied in another embodiment of the present invention, Figure 5 is an electrical safety system for the safety system for preventing harm to cooking fume in the kitchen having an air discharge control function of the present invention It shows the block diagram.

According to this, as shown in FIG. 1, the safety system for preventing harmful effects of cooking fume in a kitchen having an air emission control function to which an embodiment of the present invention is applied includes at least one hood 10, an exhaust duct 30, and an exhaust blower. (40), a harmful substance detection sensor (50) and a control unit (60). In addition, at least one intermediate exhaust duct 20 installed between the at least one hood 10 and the exhaust duct 30 may be further included.

At this time, the at least one hood 10 has an inverted hopper shape having a circular cone shape or a square cone shape with an open bottom, and may be fixedly installed on the ceiling above the cookers provided in the kitchen. In addition, the hoods 10 may have an area corresponding to the planar area of cookers provided in the cooking area.

Such hoods 10 contain various harmful gases, harmful substances, oil vapors, odors, and the like that are generated in the process of cooks cooking various foods using the corresponding cooker and rise toward the ceiling or spread around the cooker. Fume and some air (contaminated air) in the kitchen are collected through a method of sucking in response to the suction force of the exhaust blower 40 to be described later, and go directly to the exhaust duct 30 or through the relay hood 10 Exhaust duct (30) It performs the function of transmitting to the side.

Here, the area of the hoods 10 is not limited to being formed corresponding to only the plane area of one cooker as described above, and if necessary, the area of the hoods 10 includes adjacent cookers, that is, 1 to 2 or 3 to 4 hoods. It is formed to have a plane area corresponding to the plane area of the cooker, and one hood 10 is installed in a specific area in the kitchen, for example, to remove polluted air including cooking fume containing various harmful substances generated from 1 to 4 cookers. It can also be installed so that it can be collected and delivered to the relay hood 10 side.

In addition, the hoods 10 are not limited to being fixedly installed on the ceiling of the top of the cooker, and may be fixedly installed on the back or side of the cooker, if necessary.

In addition, the hood 10 is usually formed of a galvanized steel plate or a stainless steel plate, but is not limited thereto, and the hood 10 is entirely formed using a transparent member such as a transparent acrylic plate or the like, or only a part (for example, the front surface) of a transparent member is used. can also be installed.

In this way, when the whole or front surface of the hood 10 is formed of a transparent member, cooks and managers can visually observe the state of cooking fumes discharged through the corresponding hood 10 due to the operation of the exhaust blower 40. can be checked accurately.

In addition, a general filter including a non-woven fabric widely used in various air conditioners or kitchen hoods is detachably installed at the inlet of the hoods 10, if necessary, regardless of the air purifier 100 described later. Thus, it may further include one capable of primarily filtering cooking fume (fine dust and various harmful substances, odors and oil vapors, etc.) included in the contaminated air of the kitchen exhausted to the outside.

In addition, the at least one intermediate exhaust duct 20 is installed corresponding to the number of the hoods 10, regardless of the distance between the hoods 10 installed at different locations and the exhaust duct 30 to be described later. In order to collect polluted air having the same suction power and suction amount through each hood under the hood and send it to the exhaust duct 30, it is preferable to form a circular or rectangular cylindrical shape smaller than the diameter and volume of the exhaust duct 30. One end of each of the intermediate exhaust ducts 20 is coupled to the outlet of the hood 10, and the other end is connected to the inside of the exhaust duct 30 in parallel.

Each hood 10 having one end coupled to the corresponding intermediate exhaust duct 20 in the kitchen by the suction force generated when the exhaust blower 40 operates. It performs a relay function of transferring the cooking fumes collected through the air to the exhaust duct 30, respectively.

In addition, the exhaust duct 30 is installed to pass through one side of the kitchen in a state in which it is formed in a circular or rectangular cylindrical shape having a relatively large diameter and volume compared to the intermediate exhaust duct 20, and the intermediate exhaust duct 30 is installed at one end. The ducts 20 are coupled in parallel, and an exhaust blower 40 or the like may be installed at the other end.

In response to the operation of the exhaust blower 40, the exhaust duct 30 collects and exhausts all the polluted air in the kitchen that is collected through the hoods 10 and then transported through the intermediate exhaust ducts 20. It performs the function of delivering to the side of the blower 40 for use.

In this case, the exhaust duct 30 may include one in which the diameter or front surface volume is gradually reduced as the distance from the exhaust blower 40 increases.

That is, the suction power of the exhaust blower 40 becomes relatively smaller as the distance increases. For example, regardless of the installation position of the hoods 10 installed at different distances from one exhaust fan 40 When the diameter or the volume of the front surface of the exhaust duct 30 is the same, the exhaust fan 40 installed at a relatively far distance compared to the amount of air sucked through the hood 10 installed in close proximity to the exhaust fan 40 The amount of air sucked through the hood 10 is inevitably relatively small.

Therefore, the diameter or the front surface volume of the exhaust duct 30 may be moved away from the exhaust blower 40 as shown in FIGS. 1 and 2 so that the amount of air sucked through each hood 10 is the same regardless of the distance. It is preferable to form it gradually smaller as it goes.

Furthermore, in the exhaust duct 30, although not shown, exhaust noise including noise generated from the exhaust blower 40, etc. is measured, and sound waves or sounds having a reverse phase with respect to the frequency of the measured noise, etc. It may further include an active noise reducer or the like that generates and attenuates noise to minimize driving noise and exhaust noise of the blower that may be generated while discharging contaminated air in the kitchen.

In addition, the exhaust blower 40 operates at a rotational speed corresponding to a driving signal of the control unit 60 to be described later in a state installed at the end of the exhaust duct 30 outside the cooking area, and contains cooking fume. It performs a function of forcibly sucking polluted air in the kitchen and discharging it to the outside through the chimney 70 installed so that the upper end is located on the roof of the building.

At this time, the output of the exhaust blower 40 is determined in consideration of the number of hoods 10 installed, including the area within the kitchen, and in particular, the motor provided in the exhaust fan 40 is the same as described above. By adopting a motor capable of controlling the number of revolutions, it is possible to prevent unnecessary fan operating noise as well as power consumption.

In addition, the number of rotations of the motor provided in the exhaust blower 40 can be controlled by a motor control program installed in the control unit 60 or a separate motor driving circuit unit, for example, phase control or frequency / The number of revolutions may be controlled through voltage (F/V) control or pulse width modulation (PWM) control.

Here, rather than a method of controlling the number of revolutions of the exhaust blower 40 by installing a motor control program in the controller 60 described later, the phase control between the output terminal of the control unit 60 and the exhaust blower 40 Either a motor driving circuit part, a frequency/voltage (F/V) control motor driving circuit part or a pulse width modulation (PWM) control motor driving circuit part is installed, and the number of revolutions of the exhaust blower 40 is determined by the control unit. The method of controlling through each motor driving circuit in response to the output signal of (60) is more preferable from the viewpoint of management and maintenance of the motor.

At this time, the phase control refers to controlling the amount of voltage, current, or energy by changing the phase of the AC voltage supplied to the motor to a desired size, in series with the blower motor, which is the load. When an AC voltage is applied by connecting the SCR to the SCR, if the turn-on phase is deviated in relation to the AC voltage by flowing a current into the gate of the SCR, the rotation speed of the exhaust blower 40 is increased by controlling the magnitude of the voltage across the load. It is possible to appropriately discharge polluted air in the kitchen in response to the pollutant concentration value by varying the generation amount and concentration of harmful substances in the kitchen.

In addition, frequency/voltage (F/V) control refers to a process that converts commercial AC power into DC power through a converter in a power converter constructed using power semiconductors (diodes, thyristors, transistors, IGBTs, GTOs, etc.) Then, it is converted into an alternating current of an arbitrary frequency and voltage through an inverter, so that the rotation speed of the blower motor can be variably controlled.

In addition, pulse width modulation (PWM) control refers to power configured using power semiconductors (diodes, thyristors, transistors, IGBTs, GTOs, etc.) like the frequency/voltage (F/V) control. After converting commercial AC power into DC power through the converter inside the converter, DC power is converted into AC power again through the inverter, and the rotation speed of the blower motor can be variably controlled by changing the duty cycle of the pulse width. There is.

At this time, the duty ratio is a numerical value expressed as a percentage of the time that pulses within one period are "on", and the period refers to the time required for a signal to completely go through an on-and-off cycle once. , the duty ratio can be calculated with the following formula.

where D is the duty ratio, T is the time the signal is "on", and P is the period of the signal.

On the other hand, the harmful substance detection sensor 50 includes at least one or more of a carbon monoxide detection sensor, a carbon dioxide detection sensor, a fine dust detection sensor, and an electrochemical formaldehyde sensor, and contains harmful substances during heating and cooking through each cooker. It is preferable to install it inside the hood 10, which is the best location for measuring the concentration of.

Such a harmful substance detection sensor 50 performs a function of detecting in real time the concentration of various harmful substances discharged during cooking through each cooker located under each hood 10 and transmitting it to the control unit 60. .

The recommended exposure limit (REL) for carbon monoxide detected through a carbon monoxide detection sensor among harmful substances generally generated in kitchens is 35ppm (40mg/m ³ ) and ceiling concentration based on 8-hour TWA by the National Institute for Occupational Safety and Health (NIOSH) in the United States. As a standard, it is set to 200 ppm (229 mg/m ³ ), respectively.

In addition, the average concentration of carbon dioxide in the general atmosphere is about 400 to 500 ppm, _and in the case of indoors, it is around 800 ppm.

Here, carbon dioxide belongs to the indoor air maintenance standards along with fine dust (PM10) and formaldehyde according to the Indoor Air Quality Control Act, and the carbon dioxide maintenance standard is set at a maximum daily average of 1,000 ppm (1,000 mg per 1 kg of air) or less. .

In addition, as a standard for formaldehyde in indoor air, WHO is 0.1mg/m ³ (0.08ppm), which is followed by the UK and Japan, 0.1ppm (123μg/m ³ ) in Canada, Germany, and Singapore, and a separate standard in the United States. there is no

The pollutant control standards for kitchen air quality in Korea are shown in Table 1 below.

pollutant management standard fine dust (PM10) 100μg/㎥ Ultrafine dust (PM2.5) 50㎍/㎥ carbon dioxide (CO ₂ ) 1,000ppm carbon monoxide (CO) 10ppm Nitrogen dioxide (NO ₂ ) 0.1ppm Formaldehyde (HCHO) 100μg/㎥ Fusible Organic Compounds (TVCO) 500㎍/㎥ radon 148Bq/㎥ total bacillus 800CFU/㎥ mold 500CFU/㎥

Such management standard values for contaminants in the kitchen can be stored in the control unit 60 to be described later and used as reference data necessary for controlling the rotational speed of the exhaust fan 40. In addition, the control unit 60 can The concentrations of various harmful substances detected by the harmful substance detection sensors 50 installed in each hood 10 are received and the standard values for various harmful substances stored in the hood are compared with each other, and the result values are Correspondingly, through a method of automatically controlling the number of revolutions of the exhaust blower 40 according to a predetermined table value stored therein, it performs a function of maintaining an optimal environment by improving air quality in the kitchen.

For example, even if the concentration of any one contaminant among the concentrations of various harmful substances detected through the harmful substance detection sensors 50 installed in each hood 10 reaches 91 to 95% of the above management standard value In this case, the control unit 60 drives the exhaust blower 40 at the maximum rotational speed (100%) to discharge the maximum amount of polluted air in the kitchen in a minimum time (ie, a short time) to improve air quality in the kitchen can be greatly improved in a short period of time.

In addition, for example, even the concentration of any one pollutant among the concentrations of various harmful substances detected through the harmful substance detection sensors 50 installed in each of the hoods 10 is 86 to 90% compared to the management standard value. If there is no higher place, the control unit 60, for example, controls the exhaust blower 40 at a rotational speed of 86 to 90% compared to the maximum rotational speed, and a location higher than 80 to 85% compared to the management standard value If there is no problem, the rotation speed is controlled at 80~85%, and when there is no place higher than 70~79% compared to the management standard value, the rotation speed is reduced in multiple stages through the method of controlling the rotation speed at 65~70%. However, it is preferable to prevent the exhaust blower 40 from deteriorating by controlling the minimum rotation speed so that it does not fall below 60% of the maximum rotation speed, and to prevent the exhaustion of contaminated air in the kitchen.

In this way, when the control unit 60 automatically controls (i.e., variable controls) the number of revolutions in response to the concentration of harmful substances in the kitchen while driving the exhaust blower 40, the harmful substances for each different cooker are controlled. In spite of the difference in the amount of discharge, unnecessary noise and power consumption caused by an unnecessarily high rotational speed of the exhaust blower 40 can be prevented in advance.

Meanwhile, in another embodiment of the present invention, as shown in FIGS. 1 and 2 , an intake duct 80 and an intake blower 90 are further included in the components of the above-described embodiment.

At this time, the intake duct 80, like the exhaust duct 30, has a circular or rectangular cylindrical shape and is installed to pass through the other surface of the kitchen, and an amount corresponding to the operating rotational speed of the intake blower 90 described later It performs the function of guiding the outside air to flow into the cooking area.

Here, when the intake duct 80 is simply installed to pass through the other side of the kitchen, outside air introduced through the intake duct 80 may not be evenly distributed in the kitchen and may be concentrated in one place. It is preferable to further provide an intake air distributor (not shown) and a plurality of branch ducts (reference numerals are omitted) having a bellows or tubular shape at the indoor end of 80.

The branch ducts are arranged inside the ceiling so that they are not visible from the outside, and each end is evenly arranged throughout the ceiling so that the external air branched and supplied through each branch duct can be evenly sprayed throughout the entire space in the kitchen. It is desirable to do

In addition, when the ends of the branch ducts are evenly arranged and fixed on the entire ceiling as described above so that the outside air blown through each branch duct is evenly blown throughout the cooking area, the outside air discharged through these branch ducts is air Since it functions as a curtain, it is possible to prevent various harmful substances discharged during cooking through the cookers from rising toward the ceiling, so that the collecting effect of polluted indoor air through the hoods 10 can be further increased.

In addition to this, a damper is further provided at the end of the branch duct that is directly fixed to the ceiling so that the manager can arbitrarily adjust the discharge of external air distributed through each branch duct according to the environment for each zone. may be

In addition, a filter may be further provided at either the inlet or outlet of the intake duct 90 or the outlet of the branch duct to filter out various foreign substances including dust contained in outdoor air flowing into the kitchen from the outside. It is desirable to have

In addition, the intake blower 90 is installed at the outer or inner end of the intake duct 80 (considering noise, etc., it is more preferable to install it at the outer end of the intake duct 80 located outside the kitchen). In the state where the number of revolutions is controlled in response to the output signal of the control unit 60, and the number of revolutions of the exhaust blower 40 is controlled, the kitchen is discharged to the outside through the exhaust duct 30. It performs a function of introducing fresh outside air into the kitchen through the intake duct 80 corresponding to the amount of polluted air exhausted.

At this time, the output and the number of installations of the intake blowers 90 are determined in consideration of the amount of air discharged by the exhaust blowers 40, including the area in the kitchen, as in the case of the exhaust blowers 40 described above. You can do it.

In addition, the rotation speed of the motor provided in the intake blower 90 is also controlled by a motor control program mounted in the control unit 60 or a separate motor driving circuit unit, as in the exhaust blower 40 described above. For example, a phase control motor driving circuit unit having a phase control or frequency/voltage (F/V) control or pulse width modulation (PWM) control method or a frequency/voltage (F/V) control motor driving circuit unit or a pulse width modulation (PWM) control method. The number of rotations can be variably controlled by the control motor driving circuit.

In addition, in another embodiment of the present invention, as shown in FIG. 1, the air purifier 100 is further included in the above-mentioned one embodiment or in addition to the components of another embodiment.

At this time, the air purifier 100, in a state installed between the outlet of the exhaust blower 40 and the chimney 70, removes the polluted air forcibly discharged from the kitchen by the exhaust blower 40 to the inside. It passes a specific aqueous solution fresh in the air, and performs a filtering function that allows various harmful gases, harmful substances, oil vapors, and odors contained in the polluted air to be oxidized in the special aqueous solution, so that it is water-soluble and deodorized.

In addition, as described above, the air purifier 100 is not limited to only one installed between the outlet of the exhaust blower 40 and the chimney 70, but at least two or more are installed in series as shown in FIG. 2. It may include installing more.

In this way, when at least two or more air purifiers 100 are installed in series between the outlet of the exhaust blower 40 and the chimney 70, pollutants in the kitchen through the air purifier 100 Since it is self-evident that the filtering effect is doubled by that much, the number of air purifiers 100 installed in series in consideration of the exhaust amount of polluted air in the kitchen using one exhaust blower 40 including the kitchen area you have to decide

Meanwhile, the specific aqueous solution used in the air purifier 100 may include sodium hypochlorite (NaOCl) having a predetermined pH value (for example, pH 7 to 8).

Such sodium hypochlorite (NaOCl) is a colorless or light greenish-yellow liquid, has a chlorine odor, is easily soluble in water, has a strong sterilization and deodorization effect, and benzopyrene and formaldehyde contained in cooking fumes generated in the kitchen It is known to have high water solubilization and deodorization effects on carcinogens such as nitrogen oxides (NOx) and carbon monoxide (CO) burned carbon dioxide (CO2), combustible ash (fly ash) and ultrafine dust, and the aqueous solution is being stored It decomposes and generates chlorine gas, so if stored for a long time, it becomes ineffective as a disinfectant.

The bactericidal power is affected by the pH and the amount of effective chlorine, which is in a non-dissociated state. The lower the pH, the stronger the sterilizing power. The adjusted one has the greatest sterilizing power. Due to its strong corrosiveness, it should not come into contact with metal containers. When used for tableware disinfection, the tableware must be thoroughly washed before use to ensure high sterilization power. Store in a shaded glass container.

It is mainly used for purposes such as disinfection, deodorization, bleaching, and deodorization, and is used for beverages, vegetables and fruits, containers, utensils, and tableware.

As described above, in the present invention, the air purifier 100 performs a purification function for various harmful substances contained in the polluted air being exhausted by using sodium hypochlorite between the exhaust blower 40 and the chimney 70. By installing at least one more, it is possible not only to discharge cleaner air to the outside, but also to manage only the supply amount and concentration of sodium hypochlorite solution without the need for a separate filter exchange at all, so the time required for system management and maintenance and costs can be drastically reduced, and the cause of environmental pollution caused by filter waste can be minimized.

In addition, the air purifier 100 may include a sodium hypochlorite supply means 110, a septic tank 120, and at least one contaminated air supply nozzle 130, as shown in FIG. In addition, the air purifier 100 may further include at least one water level detection sensor 140 and a pH detection sensor 150.

Among the components of the air purifier 100, the sodium hypochlorite supply means 110 basically has a function of generating or receiving sodium hypochlorite (NaOCl) having a predetermined pH value and supplying it to the septic tank 120 side. carry out

In addition, as the sodium hypochlorite supply means 110, sodium hypochlorite (NaOCl) having a predetermined pH value is continuously generated through electrolysis of salt water and supplied to the septic tank 120 (ie, the septic tank 120 ) If it has a higher concentration than the pH value required by the side, dilute an appropriate amount of water to supply sodium hypochlorite having the desired pH value) or sodium hypochlorite manufactured to have a predetermined pH value It may include any one of sodium hypochlorite storage tanks supplied to the septic tank 120 in a state of receiving a predetermined capacity, and any one of these may be employed.

In addition, the septic tank 120 has a rectangular or circular enclosure shape having a predetermined volume, and a contaminated air inlet 121 into which contaminated air injection nozzles 131 of the contaminated air supply nozzle 130 described later are inserted and installed on the upper surface. and a purified air outlet 122 connected to the chimney 70 or another air purifier.

The septic tank 120 as described above aerates the sodium hypochlorite solution in a state where an appropriate amount of the sodium hypochlorite solution is supplied from the sodium hypochlorite supply means 110 so that various harmful substances included in the contaminated air sent from the kitchen are removed. In the process of contacting the sodium hypochlorite, various harmful substances in the polluted air passing in the form of bubbles are oxidized and water-soluble and deodorized.

In addition, the polluted air supply nozzle 130 is forcibly discharged through the exhaust blower 40 while being inserted into the sodium hypochlorite in the septic tank 120 through the polluted air inlet 121 at the outer end, It has a configuration having a plurality of contaminated air injection nozzles 131 for injecting the contaminated air in the cooking area into the sodium hypochlorite solution in the purification tank 120.

At least one of the contaminated air supply nozzles 130 is provided in correspondence with the discharge amount of the contaminated air in the kitchen discharged through the exhaust blower 40 and the area of the septic tank 120, and the like. The polluted air in the kitchen forcibly discharged through the blower 40 is injected into the sodium hypochlorite solution in the septic tank 120 so that the polluted air itself has numerous bubbling shapes in the sodium hypochlorite solution and the sodium hypochlorite solution It passes through and performs the function of aeration.

In addition, carbon monoxide (CO), carbon dioxide (CO2) and nitrogen oxides (CO), carbon dioxide (CO2) and nitrogen oxide ( Noxious gases such as NOx) are oxidized and water-soluble and deodorized in the process of passing through the sodium hypochlorite, and formaldehyde, benzopyrene, fly ash and ultrafine dust are collected, and then some are sludged. It sinks to the bottom of the septic tank 120.

In addition, the water level detection sensor 140 is installed in the septic tank 120 to perform a function of detecting the water level of the sodium hypochlorite solution in the septic tank 120 and transferring it to the control unit 60, and the upper and lower limit water levels. It may include installing at least one or more to detect each.

In addition, the pH detection sensor 150 performs a function of detecting the pH concentration, which is a hydrogen ion concentration index for the sodium hypochlorite solution in the septic tank 120, and transmitting it to the control unit 60.

Meanwhile, in the control unit 60, the water level in the septic tank 120 detected through the water level detection sensor 140 is below a predetermined lower limit level or the sodium hypochlorite solution detected through the pH detection sensor 150 When the pH concentration is oxidized by contaminants and lowers to a predetermined concentration (for example, pH 4 to 6), although not shown, through the operation of the sodium hypochlorite supply pump provided in the sodium hypochlorite supply means 110 The sodium hypochlorite solution can be automatically supplied to maintain the water level in the septic tank 120 at a predetermined level, as well as to maintain the pH concentration of the sodium hypochlorite solution at a predetermined concentration (for example, pH 7 to 8). there is.

When the controller 60 supplies the sodium hypochlorite solution into the septic tank 120 through the operation of the sodium hypochlorite supply pump provided in the sodium hypochlorite supply means 110, the water level in the septic tank 120 is controlled to be supplied within a range that does not exceed the upper limit water level determined through the upper limit water level detection sensor.

In another embodiment of the present invention, as shown in FIG. 3, the bottom surface (ie, bottom plate) of the septic tank 120 is formed to be inclined from one side to the other side, and the drain valve ( 160) is further included.

At this time, as the drain valve 160, a manual valve manually opened and closed by a manager or an electromagnetic valve whose opening and closing is automatically controlled by the control unit 60 may be selected and installed.

In this way, when the bottom plate of the septic tank 120 is formed to be inclined from one side to the other side, and a manual valve is installed as the drain valve 160 on the bottom of the other side of the septic tank 120, the manager installs the septic tank 120 ), visually check the degree of contamination of the sodium hypochlorite solution, etc., and open the drain valve 160 installed as a manual valve to remove the sludge precipitated at the bottom of the septic tank 120 and a part of the sodium hypochlorite solution in a contaminated state It can be manually discharged to the outside.

In addition, when the bottom plate of the septic tank 120 is formed to be inclined from one side to the other side, and a solenoid valve is installed as the drain valve 160 at the bottom of the other side of the septic tank 120, the manager has the drain valve ( 160) By operating the operation switch or opening the drain valve 160 installed as an electromagnetic valve at a predetermined time in the control unit 60 for a predetermined time, contaminant sludge and contaminated sludge precipitated on the bottom surface of the septic tank 120 Some of the sodium hypochlorite solution in the state can be automatically discharged to the outside.

In another embodiment of the present invention, as shown in FIG. 3, an electromagnetic valve is installed as the drain valve 160, and the contamination level (PPM) of the sodium hypochlorite solution in the septic tank 120 is in the septic tank 120. It further includes installing a water pollution detection sensor 170 that detects and transmits it to the control unit 60.

In this way, the water pollution detection sensor 170 is further installed in the septic tank 120, and in a state where the electromagnetic valve is installed as the drain valve 160, the control unit 60 controls the water pollution detection sensor 170 Continuously compares and determines whether the contamination level (PPM) of the sodium hypochlorite solution in the septic tank 120 detected in real time through During the opening, the sludge precipitated on the bottom of the septic tank 120 and a part of the contaminated sodium hypochlorite solution are automatically discharged to the outside.

Of course, as described above, by opening the drain valve 160 by the manager or the controller 60, the sludge precipitated on the bottom of the septic tank 120 and a part of the contaminated sodium hypochlorite solution are manually or automatically When the water level in the septic tank 120 decreases due to discharge, the control unit 60 operates the sodium hypochlorite supply pump provided in the sodium hypochlorite supply means 110 as described above to supply the sodium hypochlorite solution. By automatically replenishing, the water level in the septic tank 120 is maintained at a predetermined level, and the pH concentration of the entire solution is maintained at a predetermined concentration by the sodium hypochlorite solution newly replenished into the septic tank 120.

As described above, in the present invention, the above configuration is provided between the exhaust blower 40 and the chimney 70, and sodium hypochlorite is used to perform the purification function for various harmful substances contained in the polluted air being exhausted. By installing at least one more air purifier 100, not only can polluted air discharged from the kitchen be purified more cleanly and discharged to the outside as clean air, but there is no need for a separate filter exchange at all, and the sodium hypochlorite solution Since only the supply amount and concentration need to be managed, the time and cost of system management and maintenance can be significantly reduced, and the cause of environmental pollution caused by filter waste can be minimized.

Further, in another embodiment of the present invention, as shown in FIG. 2 , dampers 11 are further installed at outlet sides of the hoods 10 among the components of the above-described embodiment.

At this time, the damper 11 is driven by a solenoid or a servo motor whose opening and closing amounts are controlled by the control unit 60, and the opening and closing amounts of the dampers 11 are controlled by the control unit 60 for each hood ( 10), it is automatically controlled in response to the difference between the concentration value of harmful substances around the hood detected by the harmful substance detection sensors 50 installed in the hood and the reference value for each harmful substance.

In this way, the damper 11 is further installed at the outlet side of the hoods 10, and the control unit 60 causes the corresponding hood detected by the harmful substance detection sensors 50 installed in each hood 10 When the opening and closing amount is automatically adjusted in response to the difference between the reference value for each harmful substance compared to the concentration value of the surrounding harmful substances, the dampers 11 on the side of the hood 10 where a lot of harmful substances are generated are more open, The dampers 11 on the side of the hood 10, which generate relatively little harmful substances, can be opened smaller than the amount of opening of the dampers.

Therefore, in fact, the amount of polluted air discharged from each zone is different because the target substances being cooked through different cookers in the same kitchen are different or the emissions and concentrations of harmful substances emitted from the vicinity of cookers that are not heated or cooked are different. Despite the different circumstances, unnecessary blower driving noise and power consumption generated when the rotational speed of the exhaust blower 40 is controlled to the maximum based on the area where harmful substances having the maximum degree of contamination are discharged can be prevented in advance there is can

That is, in response to the difference between the reference value for each harmful substance compared to the concentration value of the harmful substance around each hood detected through the harmful substance detection sensors 50 installed in each of the hoods 10 in the control unit 60, respectively. Since the amount of opening and closing of the dampers 11 provided in the hood 10 is automatically adjusted, the dampers 11 on the side of the hood 10 where a lot of harmful substances are generated are opened a lot, and the harmful substances are relatively small. The dampers 11 on the side of the hood 10 that occur are opened small.

Therefore, the amount of contaminated air in the kitchen sucked through the hood 10 by the exhaust blower 40 is increased through the hoods 10 in which the dampers 11 are installed with a large opening, and relatively less open dampers ( 11) is installed, the amount of polluted air sucked in through the hoods 10 is reduced, so that air from areas with a high degree of contamination among the air in the kitchen can be sucked in more quickly and discharged to the outside.

Therefore, since the average pollution level in the kitchen can be rapidly lowered within a short period of time, the number of rotations of the exhaust fan 40 can be lowered within a faster period of time. Pollution and power consumption can be prevented in advance.

In addition, another embodiment of the present invention further includes installing an air curtain 200 in a space between the hoods 10 as shown in FIG. 2 .

In this way, each air curtain 200 is provided with a blowing fan for generating air, which is further installed between the hoods 10, and when food is cooked using various cookers, the control unit 60 etc. When the curtain 200 is operated, contaminated air containing various harmful substances discharged during cooking through each cooker can be prevented from rising toward the ceiling through the space between the corresponding hoods 10. Accordingly, the efficiency of discharge of polluted air containing harmful substances in the kitchen can be greatly improved.

In addition, in another embodiment of the present invention, as shown in FIG. 4, between the hoods 10 and the exhaust duct 30, length-adjustable bellows 12 are further installed, and the upper surfaces of the hoods 10 and It includes further installing the lifting means 210 between the ceilings.

At this time, the lifting means 210 includes an electric winch, etc., and bellows 12 are further installed between the hoods 10 and the exhaust duct 30 as described above, and the upper surfaces of the hoods 10 and With the elevator 210 further installed between the ceilings, the control unit 60 detects the concentration of pollutants in the air around a specific cooker through the toxic substance detection sensor 50, and as a result, the contamination to be detected. When the concentration of any one contaminant among the substances rises above the set management standard, the lifting means 210 is operated to lower and the hood 10 on the top of the cooker automatically lowers by a set height (that is, installed at the bottom of the hood) lowered close to the cooker).

In this way, when the hood 10 automatically descends to a predetermined height, a large amount of contaminants generated while heating and cooking a specific dish using the corresponding cooker spreads around the corresponding cooker. It is collected in a short time through the descending hood 10 and then automatically discharged to the outside through the exhaust duct 30, so that certain contaminants having a high concentration according to the set management standard rapidly spread to the surroundings, such as cooks, etc. damage can be greatly reduced.

Of course, when the concentration of various contaminants in the air around a specific cooker falls below the set management standard, the control unit 60 lifts and operates the lifting means 210 so that the hood 10 on the upper part of the cooker returns to its original position. automatically ascends to

Meanwhile, FIG. 5 is an electrical block diagram illustrating a safety system for preventing harm from cooking fume in a kitchen having an air discharge control function according to the present invention.

According to this, the data storage unit 61 is further installed in the data input/output terminal of the control unit 60.

In the data storage unit 61, concentration values of various harmful substances around the corresponding hood detected in real time through the harmful substance detection sensors 50 installed in each hood 10 in the controller 60 are Of course, the number of revolutions of the air intake blower 90 including the exhaust air blower 40 operating in response to the concentration values of the various harmful substances and the resulting air emission per second and intake history, as well as the fixed history of each blower It performs a function that receives data for the etc. and continuously stores them.

In addition, various state information stored in the data storage unit 61 outputs data corresponding to the request signal to the control unit 60 as well as to each unit described later when there is a request from the control unit 60. can

In addition, the output terminal of the control unit 60 may further include a display unit 62 connected thereto.

The display unit 62 is installed inside or outside the kitchen where the manager can easily monitor, and the harmful substance detection sensor 50 installed in each hood 10 in the control unit 60 The number of revolutions of the intake blower 90 including the exhaust blower 40 operating in response to the concentration values of the various hazardous substances as well as the concentration values of various harmful substances around the hood detected in real time through the Performs a function that displays various status information such as the discharge and intake amount of air accordingly, as well as the failure state in real time in the form of graphs, numbers, or tables when a failure occurs in any one of the exhaust and intake blowers do.

At this time, among the various status information displayed on the display unit 62, the concentration values of harmful substances are divided into regional and overall averages, etc., and classified by harmful substances (for example, carbon monoxide, carbon dioxide, fine dust, ultrafine dust, formaldehyde, etc.) ), including those whose concentrations are separately indicated.

In addition, the display unit 62 may further include a speaker and an alarm lamp, etc. so that when various blowers, etc. fail, they can be displayed through sound or light.

Therefore, the manager, etc. can accurately recognize the current air quality and intake and exhaust conditions in the kitchen through the display unit 62, as well as recognize the malfunction of the blower through various alarm signals, and take necessary measures in response. can be taken in a short time.

In addition, a monitor 63 or a printer 64 may be connected to the output terminal of the control unit 60.

The monitor 63 or the printer 64 is controlled by the control unit 60 if desired by a manager or the like, and harmful substances stored in the data storage unit 61 are stored in each hood 10 for each time period. The average detection value of harmful substances in the kitchen calculated through the detected concentration value and the artificial intelligence (AI) control program pre-entered into the control unit 60, and the exhaust blower 40 controlling the number of revolutions corresponding thereto, and It performs a function of displaying or printing data on the number of revolutions of the intake blower 90 for each time period and the failure state of the blowers in the form of a graph, number, or table.

Therefore, the manager, etc. can accurately recognize the current air quality and intake and exhaust conditions in the kitchen, as well as the operation and failure conditions of the blowers, etc. through the monitor 63, and take necessary measures in response to this in a short time. Using the printing data output through the printer 64, various state information can be accurately recognized and appropriately used to create work diaries and reports.

In addition, a wired or wireless bi-directional communication unit 65 may be connected to the communication terminal of the control unit 60.

The two-way communication unit 65 receives the control of the control unit 60, and the concentration values of harmful substances detected for each time zone in each hood stored in the data storage unit 61 are stored in the control unit 60 within itself. The average detection value of harmful substances in the kitchen calculated through the stored artificial intelligence (AI) control program, and the number of times of rotation of the exhaust blower 40 and the intake blower 90 whose rotation speed is controlled correspondingly thereto Values and the normal and faulty conditions of the blowers are checked at the time set by the manager, or if the manager wants, or if problems occur in operation in various structures related to cooking fume emission, the remote manager computer 220 or server 230 or It performs a function of transmitting to the manager terminal 240 in which the cooking fume harm prevention safety system management app (APP) is installed.

Therefore, even in a remote location, managers can accurately recognize various status information of the automatic cooking fume discharge system to which the present invention is applied through the manager computer 220 or the manager terminal 240 and take necessary measures quickly and accurately when a special condition occurs, Reliability can be greatly improved according to management.

At this time, since the server 230 is capable of bidirectional communication with the automatic cooking fume discharge systems installed in a plurality of kitchens, various status information is transmitted through interactive communication with the automatic cooking fume discharge systems installed in each of the plurality of kitchens. After receiving and storing the transmitted data, the corresponding data can be delivered to the system operator, etc., if necessary.

In addition, by generating statistical data on various status information, desired data can be provided if desired by an institution in charge of managing harmful substances in a kitchen. Information can be monitored remotely at once, and necessary measures can be taken accurately at the time, so that damage to workers caused by cooking fumes generated in each kitchen can be completely prevented in advance.

As described above, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention.

Therefore, since it can be implemented in various other forms without departing from the technical idea or main characteristics, the embodiments of the present invention are mere examples in all respects and should not be construed limitedly and can be implemented in various modifications. .

That is, the detailed description of the present invention described above has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those having ordinary knowledge in the art will find the invention described in the claims to be described later. It will be understood that the present invention can be variously modified and changed without departing from the spirit and technical scope of the above.

10 : Hood
11: damper 12: bellows
20: middle exhaust duct 30: exhaust duct
40: exhaust blower 50: harmful substance detection sensor
60: control unit 61: data storage unit
62: display unit 63: monitor
64: printer 65: bi-directional communication unit
70: chimney
80: intake duct 90: intake blower
100: air purifier 110: sodium hypochlorite supply means
120: septic tank
121: polluted air inlet 122: purified air outlet
130: Contaminated air supply nozzle 131: Contaminated air injection nozzle
140: water level detection sensor 150: pH detection sensor
160: drain valve 170: water pollution detection sensor
200: air curtain 210: lifting means
220: manager computer 230: server
240: manager terminal

Claims (1)

In the cooking fumes harmful prevention safety system in the kitchen,
at least one hood that is fixed to the ceiling above the cookers and collects cooking fumes containing harmful substances;
an exhaust duct installed to pass through one side of the cooking area and to collect polluted air in the cooking area collected through the hoods and deliver it to an exhaust blower;
an exhaust blower installed at an end of the exhaust duct, operating at a rotational speed corresponding to the driving signal of the control unit, and forcibly discharging air including cooking fume in the kitchen through a chimney;
harmful substance detection sensors installed in the hoods and detecting concentrations of various harmful substances discharged through cookers during cooking;
a control unit that compares the concentration of various harmful substances detected by the harmful substance detection sensor with reference values for various harmful substances stored therein, and controls the number of rotations of the exhaust blower in response to the resultant value; and
It is installed between the exhaust blower and the chimney, and the polluted air forcibly discharged from the kitchen by the exhaust blower passes through a specific aqueous solution stored therein, and various harmful gases and harmful substances contained in the contaminated air, An air purifier for accepting and deodorizing oil vapors and odors;
The air purifier,
Sodium hypochlorite supply means for generating or receiving sodium hypochlorite (NaOCl) having a predetermined pH value and supplying it to the septic tank side;
A septic tank for accepting and deodorizing various harmful substances contained in the contaminated air flowing into the inside in a state in which an appropriate amount of sodium hypochlorite solution is supplied from the sodium hypochlorite supply means while passing through the sodium hypochlorite solution;
at least one polluted air supply nozzle for injecting the polluted air in the kitchen discharged through the exhaust blower into the sodium hypochlorite solution in the septic tank;
at least one water level detection sensor for detecting a water level in the septic tank;
a pH detection sensor for detecting a pH concentration of the sodium hypochlorite solution in the septic tank; and
The bottom of the septic tank is formed to be inclined from one side to the other, and a drain valve including either a manual valve or an electromagnetic valve is installed on the bottom of the other side of the septic tank,
The control unit controls the sodium hypochlorite supply pump provided in the sodium hypochlorite supply means when the water level in the septic tank detected by the water level detection sensor is below a predetermined lower limit level or when the pH concentration is lowered below a predetermined concentration due to oxidation by contaminants. Including maintaining the water level in the septic tank at a predetermined level through the operation of, as well as maintaining the pH concentration of the sodium hypochlorite solution at a predetermined concentration,
Dampers whose opening and closing amounts are controlled by electromagnetic valves for controlling air discharge are installed on the outlet side of the hoods, and the opening and closing amounts of the dampers are the concentration values of harmful substances around the hoods detected by the harmful substance detection sensors installed in each hood A safety system for preventing harm from cooking fume in the kitchen with an air emission control function that includes being controlled by a drive signal output from the control unit in response to a difference from a reference value for each harmful substance.

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