WO2008032571A1 - Hotte - Google Patents

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Publication number
WO2008032571A1
WO2008032571A1 PCT/JP2007/066755 JP2007066755W WO2008032571A1 WO 2008032571 A1 WO2008032571 A1 WO 2008032571A1 JP 2007066755 W JP2007066755 W JP 2007066755W WO 2008032571 A1 WO2008032571 A1 WO 2008032571A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
discharge
suction
range hood
fan
Prior art date
Application number
PCT/JP2007/066755
Other languages
English (en)
Japanese (ja)
Inventor
Naoya Takeuchi
Koichi Toyoda
Original Assignee
Toto Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toto Ltd. filed Critical Toto Ltd.
Publication of WO2008032571A1 publication Critical patent/WO2008032571A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2028—Removing cooking fumes using an air curtain

Definitions

  • the present invention relates to a range hood, and more particularly to a range hood that generates an air curtain.
  • the range hood disclosed in Patent Document 1 forms a suction airflow that sucks air from the center of the range hood, and also directs the airflow from the range hood to the heating cooker around the suction airflow.
  • the air curtain wraps odors and oily smoke, and improves the collection performance by returning to the suction fan side along the flow of suction airflow.
  • the range hood disclosed in Patent Document 2 forms an air curtain around the suction airflow from the range hood toward the heating cooker, as in Patent Document 1.
  • This air curtain can prevent the spread of odors and oily smoke generated during cooking by blocking the suction area for sucking odors and oily smoke generated during cooking and the external area around it. Improves performance.
  • the range hood disclosed in Patent Document 3 forms a suction air flow that sucks air from the center of the range hood, and the air that forms the air curtain moves from the periphery of the heating cooker to the range hood. It is discharged toward.
  • This air curtain can prevent the spread of odors and oily smoke generated during cooking by blocking between the suction area and the external area around it, improving the collection performance.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2002-228222 (FIG. 2)
  • Patent Document 2 JP 2003-343855 A (Fig. 2)
  • Patent Document 3 Japanese Patent Laid-Open No. 11-337072 (Fig. 3) Disclosure of the invention
  • the range hood disclosed in Patent Document 3 has a problem that workability and cleanability are poor because it is discharged from the peripheral portion of the cooking device toward the range hood. This is because if an air curtain outlet is provided in the periphery of the cooking device, cooking waste may fall at the outlet and the cooking space may be reduced. In addition, since air curtain-related parts are mounted on the floor cabinet, there is a problem that the storage space of the floor cabinet is reduced. And the range hood is divided into two parts above and near the cooking device, making it difficult to manufacture and manage.
  • an object of the present invention is to provide a range hood capable of forming an air curtain that improves the collection performance!
  • a suction port arranged opposite to the heating cooker and for sucking air; and air that extends in the circumferential direction around at least a portion of the suction port and forms an air curtain toward the cooking device side
  • a range hood having a discharge port for discharging
  • the air curtain reaches the vicinity of the heating cooker and sucks from the suction port
  • a range hood characterized by having discharge state control means for controlling the air forming the air curtain so as not to be affected by the suction airflow force according to the air volume.
  • the range hood according to the present invention can form an air curtain that improves the collection performance.
  • FIG. 1 is a front view showing a range hood and a heating cooker according to a first embodiment of the present invention
  • FIG. 2 is a bottom view of the range hood of FIG.
  • the range hood 1 is disposed above the heating cooker 70, and includes a hood body 2 and a suction fan 4 disposed inside the hood body 2. Yes.
  • the hood main body 2 has a lower part 2a and an upper part 2c disposed on the lower part 2a, and the suction fan 4 is accommodated in the upper part 2c.
  • the internal space 2d of the lower portion 2a constitutes a suction air passage, and the air therein is sucked by the suction fan 4.
  • the suction fan 4 is adjusted by a rotation adjustment means (not shown), for example, adjusting the frequency for an AC motor and the voltage for a DC motor, etc. I am able to do that.
  • the hood body 2 may be disposed in contact with the wall, or may be disposed away from the room wall like an island type kitchen.
  • the lower portion 2a of the hood main body 2 has a rectangular lower surface member 6, and the lower surface member 6 has a lower surface 6b having a central hole 6a.
  • a current plate 8 is arranged inside the central hole 6a, and a suction port 10 is formed between the lower surface member 6 and the current plate 8 so as to face the cooking device 70 and suck air.
  • the suction port 10 has a rectangular ring shape and is provided along the periphery of the lower surface member 6, and the cooker side 12a is formed wider than the other side, that is, the back side 12b, the left side 12c and the right side 12d. Has been.
  • the lower surface 6b of the lower surface member 6 is directed toward the heating cooker 70, and the air forming the air curtain is Discharge ports 14b, 14c, and 14d to be discharged are provided between the peripheral edge 6c of the lower surface member 6 and the suction port 10.
  • the discharge ports 14b, 14c, and 14d extend in the circumferential direction around a portion of the suction port 10.
  • the suction port 10 may extend linearly, may extend in a curved line, or may be a combination thereof.
  • the discharge ports 14b, 14c, 14d are composed of a back side discharge port 14b provided on the back side, a left side discharge port 14c provided on the left side, and a right side discharge port 14d provided on the right side. ing.
  • the directional force toward the cooking device 70 means the flow discharged with an angle of ⁇ force S0 to 30 ° shown in FIG. In other words, it is a flow that faces the outside of the range hood, including the vertical downward direction.
  • ⁇ force S0 to 30 ° shown in FIG.
  • the outer side and the inner side in the first embodiment are referred to as the inner side
  • the side closer to the peripheral edge 6c of the lower surface member 6 is referred to as the outer side.
  • Each of the rear side discharge port 14b, the left side discharge port 14c, and the right side discharge port 14d has a width changing portion 28 having a width changing contour in which the width changes.
  • each of the discharge ports 14b, 14c, 14d is connected to a discharge fan 34 through an air passage 32.
  • the discharge fan 34 is a cross flow fan, for example, and is accommodated in the lower part 2a of the range hood body 2.
  • the discharge fan 34 can be adjusted by the discharge state control means 60, for example, by adjusting the frequency for an AC motor and the voltage for a DC motor to vary the motor speed and adjust the wind speed or volume. Can be done.
  • the discharge fan 34 is disposed in the range hood main body 2 inside the discharge ports 14b, 14c, and 14d.
  • the outer sides of the discharge ports 14b, 14c, 14d are in a straight line parallel to the peripheral edge 6c of the lower surface member 6.
  • the discharge ports 14b, 14c, and 14d are partially formed with wide regions that protrude inward, that is, toward the suction port 10 side.
  • a louver 40 as an angle adjusting means is provided in the vicinity of the outlets of the discharge ports 14b, 14c, 14d so that the discharge angle can be adjusted.
  • the nore bar 40 can adjust the discharge angle by the discharge state control means 60.
  • the suction fan 4 sucks the air in the suction area 50 from the heating cooker 70 through the suction port 10. At the same time, the air is exhausted to the outside through the suction air passage 205, and at the same time, air is sent downward from the discharge ports 14b, 14c and 14d through the air passage 32 from the discharge fan 34.
  • the delivered air that is, the air forming the air curtain, reaches the vicinity of the heating cooker 70 so as to block the suction area 50 and the external area 51.
  • the influence of the turbulent wind (cross wind) W between the heating cooker 70 and the range hood 1 can be blocked by the air curtain. After reaching the vicinity of the heating cooker 70, the air curtain rises toward the suction port 10.
  • the cooking exhaust flow is guided to the suction port 10.
  • the amount of the cooked exhaust collected at the suction port 10 is increased by blocking the influence of the turbulent wind (crosswind) W and guiding the cooked exhaust. In other words, the collection performance is improved.
  • the discharge fan 34 can adjust the wind speed or the air volume by changing the number of rotations of the motor according to the air volume of the suction fan 4 by the discharge state control means 60. It is like this.
  • the nozzle 40 can adjust the discharge angle according to the air volume of the suction fan 4 by the discharge state control means 60.
  • the discharge state control means 60 can control the discharge state of the air curtain according to the air volume of the suction fan 4.
  • the discharge air volume and the discharge angle can be adjusted by controlling the discharge state. More specifically, according to the discharge state control means 60, the air volume of the discharge fan 34 increases as the air volume of the suction fan 4 increases.
  • the angle discharged from the discharge port can be controlled to face the outside of the range hood.
  • FIG. 3 is a flowchart specifically showing the flow of control contents by the discharge state control device 60 of the range hood 1 of the present embodiment.
  • “S” in FIG. 3 indicates each step. 1 and 2 show the state of S8 in FIG. This will be explained in detail below, including the process of S8.
  • the motor of the suction fan 4 has a force that is roughly adjusted by the rotation adjusting means. Even at the same frequency and voltage, the rotational speed slightly changes depending on the state of the suction air passage 205.
  • the air flow level of the suction fan 4 is “weak” and is higher than the predetermined rotation speed L, the pressure loss in the suction air passage 205 is high, and the air flow of the suction fan 4 is “low”. This means that there are fewer. Therefore, the air flow level of the discharge fan 34 is “weakest” according to the air flow of the suction fan 4, that is, the air flow can be optimized by making the air flow the smallest.
  • the air flow level of the suction fan 4 is “weak”, it is less than the predetermined rotation speed L.
  • the pressure loss in the suction air passage 205 is low, and the air flow force S “weak” of the suction fan 4 is high. Therefore, according to the air volume of the suction fan 4, the air flow level of the discharge fan 34 is set to “weak” with a larger air volume than “weakest”, so that an optimal air curtain flow can be obtained.
  • the process proceeds to S9, and the rotational speed N of the suction fan 4 is detected. Then, in S 10, it is determined whether or not the rotational speed N is higher than the predetermined rotational speed H. When the rotational speed N is higher than the predetermined rotational speed H, the process proceeds to S11, and the air volume level of the discharge fan 34 is set to “strong”. On the other hand, if the rotational speed N is not higher than the predetermined rotational speed H, the process proceeds to S12 and the air volume level of the discharge fan 34 is set to “strongest”. Then, after S5, S6, S8, Sll, and S12, the process proceeds to S2 and S2 and subsequent steps are repeated until the user selects stop using a switch (not shown).
  • the process proceeds to S5 or S6 depending on the pressure loss state of the suction air passage 205, and the discharge fan 34 Air volume force S “Weakest” or “Weak”. Thereafter, when the user selects the “medium” air volume level of the suction fan 4 with a switch (not shown), the process proceeds to S8 and becomes “the air volume force of the discharge fan 34”. As described above, the air flow of the discharge fan 34 is controlled to increase as the air flow of the suction fan 4 increases.
  • the setting of the wind speed or air volume in the "strongest, strong, medium, weak, weakest" of the discharge fan 34 is a predetermined value determined in advance through experiments or the like in consideration of the behavior of the suction airflow. It is becoming a value. Further, the predetermined rotational speed H is higher than the predetermined rotational speed.
  • the air volume of the suction fan 4 is adjusted so that the air volume of the discharge fan 34 is reduced, and conversely, the air volume of the discharge fan 34 is increased as the air volume of the suction fan 4 is increased.
  • an optimal air curtain flow can be obtained.
  • air is discharged from the discharge port with respect to the air volume sucked from the suction port 10. It is preferable that the ratio of air volume is 0 ⁇ 6 ⁇ ;
  • the optimal air curtain flow is that the suction area 50 and the external area 51 are shut off to the vicinity of the heating cooker 70, and the cooking exhaust is guided from the vicinity of the heating controller 70 to the suction port 10. It is a flow.
  • the collection performance can be improved by inducing the turbulent wind (cross wind) W, that is, the cooking exhaust gas without being affected by the turbulence from the external region 51.
  • the air flow of the suction fan 4 can be adjusted by making adjustments as shown in parentheses of ⁇ , S5, S6, S8, Sl, and S12 as shown in Fig. 3 Depending on the situation, the air curtain flow can be optimized. More specifically, the smaller the air flow of the suction fan 4, the more the air curtain discharge angle is adjusted to be inward so that the discharge angle of the air curtain is closer to the vertically downward direction.
  • an optimal air curtain flow By performing control such as adjustment so as to face the outside of the range hood 1, an optimal air curtain flow can be obtained.
  • the optimal air curtain flow By using the optimal air curtain flow, the influence of disturbance wind (crosswind) W can be cut off and the flow of cooking exhaust can be induced, and the amount of cooking exhaust collected at the suction port 10 Therefore, the collection performance is improved.
  • the current value of the suction fan 4 may be detected.
  • the wind speed or pressure in the suction air path 205 may be detected that is not based on the rotation speed or current value of the suction fan 4.
  • the apparatus shown in FIG. 4 is an apparatus in which the air curtain discharge unit used in the first embodiment of the present invention is mounted on the heating cooker 70 and the range hood 1.
  • a cross wind generator 204 was provided, and a turbulent wind (cross wind) W was supplied to the pan 203 on the heating cooker 70.
  • pre-CO The gas cylinder 201 was directly fed into the suction air channel 205 through the flow meter 202 at 12.5 liters / minute, and the CO concentration in the suction air channel 205 at that time was directly set as the supplied CO concentration.
  • p3 is the collected CO concentration
  • p4 is the directly supplied CO concentration.
  • the CO concentrations p 3 and p 4 values obtained by subtracting the atmospheric concentration from the measured concentrations were adopted.
  • the CO concentration was measured with a Vaisala CO converter GMT222.
  • the atmospheric concentration was measured at a point about lm away from the edge of the cooking device 70 and about lm from the floor.
  • the distance from the upper surface of the cooking device 70 to the lower surface of the range hood 1 is about 940 mm
  • the distance from the center of the pan 203 to the end surface of the cross wind generator 204 is about 900 mm.
  • the outlet size of the cross wind generator 204 the height is about 300mm from the height equivalent to the top of the heating cooker 70, and the depth is about 600mm.
  • FIG. 5 to FIG. 7 are schematic schematic diagrams of experiments using the apparatus shown in FIG. This is an explanation of the flow of air force and shows the mainstream. In other words, it shows the main flow that does not show all the flows.
  • FIG. 5 to 7 all show the case where the suction air volume is 200 m 3 / hour, which corresponds to the condition A in FIG.
  • Figure 5 is a discharge air volume 132m 3 / h (collection rate 34%)
  • Figure 6 is a discharge air volume 207m 3 / h (collection rate 69%)
  • Figure 7 is discharged air volume 244m 3 / h (collection rate 58%) Is shown.
  • the air curtain reaches the vicinity of the heating controller 70 so as to block the suction region 50 and the external region 51.
  • the air curtain By reaching the vicinity of the heating cooker 70, it is possible to use the air curtain to block the influence of the turbulent wind (cross wind) W between the heating cooker 70 and the range hood 1.
  • the air curtain is directed to the suction port 10 and then rises.
  • the cooking exhaust flow is guided to the suction port 10. This In other words, the amount of the cooked exhaust collected at the suction port 10 is increased by blocking the influence of the turbulent wind (cross wind) w and guiding the cooked exhaust. In other words, the collection performance is improved.
  • the air curtain has too much wind speed or air volume, so it is not pulled too much toward the suction port 10 side, reaches too close to the heating cooker 70, and a part flows to the external region 51. That's what happens.
  • Condition A is a suction air volume of 200 m 3 / hour
  • Condition B is a suction air volume of 300 m 3 / hour
  • Condition C is a suction air volume of 350 m 3 / hour.
  • the suction air volume is 200 m. 3 / discharge air volume 207m 3 / h at time (% collection rate 69), the discharge air volume 282m 3 / h (collection rate 76%) than when the suction air volume 300 meters 3 /, the suction air volume 350 meters 3 / discharge air volume 320 m 3 in case / H (collection rate 77%).
  • the suction air volume changes, the optimum discharge air volume also changes.
  • the ratio of the discharge air volume to the suction air volume (discharge air volume / suction air volume) when the collection rate was 60% or more was calculated to be 0.6 to 1.2.
  • the ratio of the discharge air volume and the suction air volume when the collection rate was 65% or more was calculated, it was 0.7 to 1.1. Therefore, when the ratio of the discharge air volume and the suction air volume is 0.6 to 1.2 times, the collection rate is high, and 0.7 to 1.1 times is more preferable.
  • FIG. 9 shows experimental results when the discharge angle is changed.
  • Condition D is a suction air volume of 300 m 3 / hour
  • Condition E is a suction air volume of 420 m 3 / hour.
  • the discharge angle is preferably 0 ° to 30 ° in terms of ⁇ in FIG. 1, assuming that the suction air volume is further increased or the intensity of the turbulent wind (cross wind) W is increased.
  • ⁇ represents an angle between the vertically downward direction and the direction in which the wind speed immediately after the discharge port becomes maximum.
  • the above-mentioned thermal anemometer is used to measure the point where the wind speed shows the maximum value.
  • the direction in which the wind speed immediately after the discharge port becomes maximum is a direction perpendicular to the probe 210 of the thermal anemometer.
  • the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims. Needless to say, these are also included in the scope of the present invention.
  • the adjustment of the wind speed or the air volume is not limited to this, and the air discharged from the discharge ports 14b, 14c, 14d If the wind speed or air volume can be changed.
  • the cross-sectional area of the air passage 32 can be changed by a throttle means (not shown), or a hole (not shown) communicating with the internal space 2d is provided in the air passage 32. Adjust the cross-sectional area of the hole to make the amount of leakage variable.
  • FIG. 1 is a front view showing a range hood and a heating cooker according to a first embodiment of the present invention.
  • FIG. 2 is a bottom view of the range hood shown in FIG.
  • FIG. 3 is a flowchart specifically showing the flow of control contents of the discharge state control device in the range hood shown in FIG. 1.
  • FIG. 4 is a schematic diagram of the apparatus used in the experiment.
  • FIG. 5 is a schematic diagram of an experiment.
  • FIG. 6 is a schematic diagram of the experiment.
  • FIG. 7 is a schematic diagram of an experiment.
  • FIG. 8 is a graph showing experimental results.
  • FIG. 9 is a graph showing experimental results.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Abstract

L'invention concerne une hotte capable de former un rideau d'air augmentant la performance de capture. La hotte placée au-dessus d'un dispositif de cuisson possède une ouverture d'aspiration placée au-dessus du dispositif de cuisson et aspirant l'air. Ladite hotte possède également une ouverture d'éjection s'étendant de façon périphérique autour d'au moins une partie de l'ouverture d'aspiration et éjectant de l'air qui forme un rideau d'air dirigé vers le dispositif de cuisson. La hotte dispose de moyens de commande d'éjection de rejet pour amener le rideau d'air à arriver à proximité du dispositif de cuisson afin d'assurer une protection et, en fonction de la quantité d'air aspiré par l'ouverture d'aspiration, commande l'air qui forme le rideau d'air de telle sorte que l'air n'est pas affecté par un courant d'air d'aspiration.
PCT/JP2007/066755 2006-09-14 2007-08-29 Hotte WO2008032571A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-249179 2006-09-14
JP2006249179A JP2008070049A (ja) 2006-09-14 2006-09-14 レンジフード

Publications (1)

Publication Number Publication Date
WO2008032571A1 true WO2008032571A1 (fr) 2008-03-20

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JP (1) JP2008070049A (fr)
WO (1) WO2008032571A1 (fr)

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WO2013138416A1 (fr) * 2012-03-16 2013-09-19 Illinois Tool Works Inc. Extracteur de composant en suspension dans l'air avec débits réglables
US9272237B2 (en) 2013-06-28 2016-03-01 Illinois Tool Works Inc. Three-phase portable airborne component extractor with rotational direction control
US9821351B2 (en) 2011-11-11 2017-11-21 Illinois Tool Works Inc. Welding fume extractor
US9839948B2 (en) 2013-01-29 2017-12-12 Illinois Tool Works Inc. Fume evacuation system
US10242317B2 (en) 2014-11-25 2019-03-26 Illinois Tool Works Inc. System for estimating the amount and content of fumes
CN109724127A (zh) * 2017-10-31 2019-05-07 宁波方太厨具有限公司 一种可调节风量的吸油烟机及其控制方法
US10808953B2 (en) 2013-06-28 2020-10-20 Illinois Tool Works Inc. Airborne component extractor with baffled debris collection
US11014132B2 (en) 2015-07-16 2021-05-25 Illinois Tool Works Inc. Extractor with end-mounted positive pressure system
US11141808B2 (en) 2011-02-01 2021-10-12 Illinois Tool Works Inc. Fume extractor for welding applications
US11530826B2 (en) 2015-07-16 2022-12-20 Illinois Tool Works Inc. Extractor with segmented positive pressure airflow system

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JP2011518306A (ja) 2008-04-18 2011-06-23 オーワイ ハルトン グループ リミテッド 増強捕捉及び封じ込め用排気装置、システム及び方法
JP5169791B2 (ja) * 2008-12-15 2013-03-27 Ｔｏｔｏ株式会社 排気送風システム
JP2010190458A (ja) * 2009-02-17 2010-09-02 Toto Ltd 排気送風システム
CN105674360A (zh) * 2016-02-05 2016-06-15 珠海格力电器股份有限公司 油烟机
CN105783064B (zh) * 2016-03-14 2018-11-06 宁波方太厨具有限公司 具有助吸装置的吸油烟机及抽吸油烟的方法
KR102311159B1 (ko) * 2018-07-20 2021-10-13 주식회사 경동나비엔 급기장치 및 급기장치의 제어방법
JP7137831B2 (ja) * 2018-07-26 2022-09-15 富士工業株式会社 レンジフード
JP7399683B2 (ja) * 2019-11-06 2023-12-18 協立エアテック株式会社 排気フード
KR200495257Y1 (ko) * 2021-10-06 2022-04-08 유계주 주방 스마트 후드
KR102381708B1 (ko) * 2022-01-26 2022-04-01 유계주 주방 스마트 후드
KR102381710B1 (ko) * 2022-02-07 2022-04-01 유계주 청정공기가 분사되는 스마트 주방 후드

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US11141808B2 (en) 2011-02-01 2021-10-12 Illinois Tool Works Inc. Fume extractor for welding applications
US9821351B2 (en) 2011-11-11 2017-11-21 Illinois Tool Works Inc. Welding fume extractor
CN104271271B (zh) * 2012-03-16 2017-09-29 伊利诺斯工具制品有限公司 优化的空气承载成分抽出器
CN104271271A (zh) * 2012-03-16 2015-01-07 伊利诺斯工具制品有限公司 优化的空气承载成分抽出器
WO2013138567A1 (fr) * 2012-03-16 2013-09-19 Illinois Tool Works Inc. Extracteur de composants en suspension dans l'air optimisé
US9468958B2 (en) 2012-03-16 2016-10-18 Illinois Tool Works Inc. Airborne component extractor with adjustable flow rates
US9498805B2 (en) 2012-03-16 2016-11-22 Illinois Tool Works Inc. Airborne component extractor with improved flow paths
US9505042B2 (en) 2012-03-16 2016-11-29 Illinois Tool Works Inc. Airborne component extractor with improved power and pressure performance
US9505041B2 (en) 2012-03-16 2016-11-29 Illinois Tool Works Inc. Optimized airborne component extractor
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WO2013138416A1 (fr) * 2012-03-16 2013-09-19 Illinois Tool Works Inc. Extracteur de composant en suspension dans l'air avec débits réglables
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