JPH06280800A - Induced blast device - Google Patents

Induced blast device

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Publication number
JPH06280800A
JPH06280800A JP6960993A JP6960993A JPH06280800A JP H06280800 A JPH06280800 A JP H06280800A JP 6960993 A JP6960993 A JP 6960993A JP 6960993 A JP6960993 A JP 6960993A JP H06280800 A JPH06280800 A JP H06280800A
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JP
Japan
Prior art keywords
orifice
venturi
gap
portion
tubular portion
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP6960993A
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Japanese (ja)
Inventor
Takayoshi Matsumoto
隆善 松本
Original Assignee
Matsushita Seiko Co Ltd
松下精工株式会社
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Publication date
Application filed by Matsushita Seiko Co Ltd, 松下精工株式会社 filed Critical Matsushita Seiko Co Ltd
Priority to JP6960993A priority Critical patent/JPH06280800A/en
Publication of JPH06280800A publication Critical patent/JPH06280800A/en
Application status is Granted legal-status Critical

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Abstract

PURPOSE: To provide an induced blast device which is designed to reduce and uniformize a gap between a venturi and an orifice without extremely improving precision of a constituting part.
CONSTITUTION: An induced blast device comprises a trumpet-form venturi 3: an orifice 4 positioned inside the opening end part on the conical cylinder part 1 side of the venturi 3 and having an annular gap A produced between the outer peripheral part thereof and the conical cylinder part 1: an orifice press 4A brought into contact with the rear end part of the orifice 4 and securely pressing the orifice 4 against the venturi 3: and a box-form pressure chamber 5 which fixes the orifice press 4A and with which the venturi 3 and the orifice 4 are surrounded, and which is formed to the outside thereof. A pressure air feeding means to feed pressure air to the interior of the pressure chamber 5 is provided and the annular gap A is uniformly ensured by means of a plurality of protrusions 3A on the gap.
COPYRIGHT: (C)1994,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、おもに住宅などの換気のために用いられる誘引送風装置に関するものである。 The present invention relates is mainly relates induced draft device used for ventilation, such as houses.

【0002】 [0002]

【従来の技術】近年、住宅の高気密化が進んでいるが、 In recent years, it has advanced high airtightness of the housing,
この結果換気の必要性が高まっており、低騒音でより快適な換気を実現し、かつ施工性のよいものが求められている。 As a result there is an increasing need for ventilation, are sought to achieve a more comfortable ventilation with low noise, and having good workability is.

【0003】従来より換気装置は、基本的に電動機と羽根からなる送風装置により室内の空気を屋外に排出しており、室内の快適性を向上させるためには、電動機や羽根の低騒音化が重要な課題となっていた。 [0003] Conventionally ventilator is discharged indoor air by the blowing device consisting essentially of an electric motor and the blade outdoors, in order to improve the indoor comfort is low noise of the motor and blades It had become an important issue.

【0004】そこで、騒音の発生源である電動機や羽根を用いない換気装置として、実開昭59−45428号公報に示すようなものがあった。 [0004] Therefore, as a ventilator which does not use an electric motor and the blade which is a source of noise, there is one as shown in Japanese Unexamined Utility Model Publication No. 59-45428. これは通風路内部に設けたノズルから一次空気を勢いよく噴射させ、これによって通風路内部に発生する誘引作用を用いて室内の換気を行うものであるが、誘引作用効率を高めるためには一次空気の吹き出し風速を相当高くする必要があり、この結果この吹き出し音が高くなることから、換気効率をあまり高くすることができないという課題があった。 This was vigorously inject primary air from a nozzle provided inside ventilation passage, whereby it is intended to ventilate the room with the attracting effect generated inside ventilation passage, the primary in order to increase the attraction effect efficiency it is necessary to considerably higher the speed of air blowing air, as a result since the blow-off sound is high, there is a problem that can not be so high ventilation efficiency.

【0005】このようなことから、電動機や羽根を用いることなく、しかも誘引作用効率を高めるものとして特開昭62−58100号公報に示すようなものもあった。 [0005] For this reason, without using the electric motor and the blade, moreover it was also those shown in JP-A-62-58100 as to increase the attraction effect efficiency. 以下、その構成について図6を参照しながら説明する。 It will be described below with reference to FIG. 6. The structure.

【0006】図に示すように、円錐筒部101と円筒部102を滑らかに結んだラッパ状のベンチュリー103 [0006] As shown, a trumpet-shaped venturi 103 that smoothly connecting the tapered tubular portion 101 and the cylindrical portion 102
と、このベンチュリー103の円錐筒部101側開口端部の内側に位置して、その外周部と円錐筒部101との間に環状の隙間Bを形成するオリフィス104と、このオリフィス104を固定するとともに、オリフィス10 When, positioned inside the tapered tubular portion 101 side open end of the venturi 103, the orifice 104 to form an annular gap B between the outer peripheral portion and the conical tubular portion 101 to secure the orifice 104 with, the orifice 10
4、およびベンチュリー103を囲み、これらの外側に形成される箱状の圧力チャンバー105と、この圧力チャンバー105と接続された接続管107内を通して圧力チャンバー105内部に加圧空気を供給する送風機(図示せず)とから送風装置が構成されている。 4, and surrounds the venturi 103, these a box-shaped pressure chamber 105 formed outside, the pressure chamber 105 and the connecting connection pipe pressure chamber 105 inside the pressurized air supply blower through within 107 (FIG. blower is configured from Shimese not) and. そして、たとえば、オリフィス104の吸込口108を室内(図示せず)と連通させるとともに、ベンチュリー10 Then, for example, with communicating the suction port 108 of the orifice 104 and chamber (not shown), the venturi 10
3の吐出口109を室外(図示せず)と連通させておき、送風機で加圧させた一次空気110を圧力チャンバー105内部に送り込むと、この一次空気110が環状の隙間Bを通過する際にその風速が高められて、ベンチュリー103内部の吐出口109側に吹き出される。 3 of the discharge port 109 outside (not shown) and keep communicated, the primary air 110 that has pressurized by the blower when fed to the internal pressure chamber 105, when the primary air 110 passing through the annular gap B as with the wind speed is increased, it is blown into the discharge port 109 side of the inner venturi 103. これによって、ベンチュリー103内部およびオリフィス104内部に誘引作用が発生し、室内の空気111が吸込口108から吸い込まれていき、ベンチュリー103 Thus, the venturi 103 internal and orifice 104 internal to attract action occurs, will indoor air 111 is sucked from the suction port 108, venturi 103
およびオリフィス104内部を通過して吐出口109から室外へ排出される。 And it is discharged from the discharge port 109 passes through the internal orifice 104 to the outdoor.

【0007】そして上記構成の送風装置は、コアンダ効果(Coanda effect…気体の噴流が、噴流軸の方向と湾曲した壁の曲面に沿った方向の近くを流れようとする傾向をいい、流体素子としての応用が考えられている。)によって、一次空気の吹き出し音を上げることなく、換気効率を向上させていた。 [0007] And blowing device having the above structure, the jet of the Coanda effect (Coanda effect ... gas, means a tendency to tend to flow Near direction along the curved surface of the wall and a curved direction of the jet axis, as a fluid element application is considered by.), without raising the balloon sound primary air had improved ventilation efficiency.

【0008】 [0008]

【発明が解決しようとする課題】ところで、誘引作用とコアンダ効果とを用いて室内の空気を室外へ排出する場合には、環状の隙間Bを極力狭く、かつ均一にすることによって、換気効率を大幅に向上させることはよく知られているが、上記従来の誘引送風装置では、環状の隙間Bを狭く、しかも均一にさせるには、この環状の隙間B [SUMMARY OF THE INVENTION Incidentally, in the case of discharging the indoor air to the outdoor with the attractant effect and the Coanda effect, by the annular gap B as narrow as possible, and uniform, the ventilation efficiency Although it is well known to significantly improve the aforementioned conventional induced draft system, narrow annular gap B, moreover to uniform, this annular gap B
に影響を及ぼすベンチュリー103およびオリフィス1 Influence the venturi 103 and the orifice 1
04などの個々の構成部品の寸法精度を大幅に向上させなければならないので、製造コストが大幅に増大するという問題があった。 Since it must significantly improve the dimensional accuracy of individual components, such as 04, there is a problem that the manufacturing cost is greatly increased.

【0009】本発明は上記課題を解決するもので、極力低コストでベンチュリーとオリフィスとの間の環状の隙間を狭く、かつ均一にすることのできる誘引送風装置を提供することを目的としている。 [0009] The present invention is intended to provide an induced draft apparatus annular gaps narrow and can be made uniform between the things in, venturi and orifice as possible cost to solve the above problems.

【0010】 [0010]

【課題を解決するための手段】本発明の上記目的を達成するための第1の手段は、円錐筒部と円筒部を滑らかに結んだラッパ状のベンチュリーと、このベンチュリーの円錐筒部側開口端部の内側に位置して、その外周部と円錐筒部との間に環状の隙間を形成するオリフィスと、このオリフィスの後端部に当接し、前記オリフィスを前記ベンチュリーに押し付け固定するオリフィス押さえと、 First means for achieving the above object of the present invention, in order to solve the problem] has a trumpet-shaped venturi connecting smoothly the tapered tubular portion and the cylindrical portion, the tapered tubular portion side opening of the venturi located inside the end portion, and an orifice to form an annular gap between the outer peripheral portion and the conical tube portion, abuts against the rear end of the orifice, the orifice hold-down for securing pressing the orifice into the venturi When,
このオリフィス押さえを固定するとともに、前記ベンチュリーおよび前記オリフィスを囲み、これらの外側に形成される箱状の圧力チャンバーと、この圧力チャンバー内部に加圧空気を供給する加圧空気供給手段とを備え、 Thereby fixing the orifice retainer, said venturi and surrounding the orifice, comprising a box-shaped pressure chamber formed in these outer and a pressurized air supply means for supplying pressurized air to the internal pressure chamber,
前記環状の隙間はこの隙間に設けられた複数の突起によって均一に確保されてなる誘引送風装置の構成をしたものである。 The annular gap is obtained by the arrangement of uniformly secured composed induced draft device by a plurality of projections provided in the gap.

【0011】また、上記目的を達成するための第2の手段は、突起の形状を環状の隙間を流れる空気の進行方向に対して、その長軸側がほぼ平行に位置する流線形とした誘引送風装置の構成をしたものである。 Further, the second means for achieving the above object, the shape of the projection to the traveling direction of the air flowing through the gap between the annular, induced draft, which was streamlined its long shaft is positioned substantially parallel it is obtained by the configuration of the device.

【0012】また、上記目的を達成するための第3の手段は、オリフィスとオリフィス押さえとの当接部をその曲率半径の中心がベンチュリーの円錐筒部の中心軸上に位置する球面形状に形成した誘引送風装置の構成をしたものである。 Further, a third means for achieving the above object, formed in a spherical shape whose radius of curvature around the contact portion between the orifice and the orifice retainer is positioned on the central axis of the tapered tubular portion of the venturi it is obtained by the configuration of the induced draft device.

【0013】また、上記目的を達成するための第4の手段は、オリフィスとオリフィス押さえとの当接部に弾性材で形成したOリングを介在させた誘引送風装置の構成としている。 Further, the fourth means for achieving the above object, has a configuration of the induced draft device where the O-ring formed of an elastic material is interposed at the contact portion between the orifice and the orifice retainer.

【0014】 [0014]

【作用】本発明は上記した第1の手段の構成により、オリフィス押さえでオリフィスをベンチュリーに押し付け固定するときベンチュリーとオリフィスとの間に設けられた突起によって、狭くかつ均一な隙間が形成されることとなる。 DETAILED DESCRIPTION OF THE INVENTION The present invention by the configuration of the first means described above, the protrusions provided between the venturi and an orifice when securing pressing the orifice venturi orifice retainer, and uniform gap is formed narrower to become.

【0015】また、第2の手段の構成により、環状の隙間を流れる空気は、その進行方向を突起によって乱されることなく、効率良くベンチュリー内部に吹き出されることとなる。 Further, the configuration of the second means, the air flowing through the annular gap, without being disturbed by the projection of the traveling direction and be blown into the internal efficiency venturi.

【0016】また、第3の手段の構成により、オリフィス押さえでオリフィスをベンチュリーに押し付け固定する際、オリフィスをオリフィス押さえに対して調芯することができ、ベンチュリーの円錐筒部の中心軸上にオリフィスの中心が容易に合致されることとなり、均一な環状の隙間を確実に形成することができることとなる。 Further, the configuration of the third means, when fixing presses the orifice venturi orifice holding, orifice can wick adjustment relative to the orifice retainer, an orifice on the central axis of the tapered tubular portion of the venturi center will be readily be matched, it becomes possible to reliably form a uniform annular gap.

【0017】また、第4の手段の構成により、オリフィスとオリフィス押さえとの当接部に隙間が発生しても、 Further, the configuration of the fourth means, even if a gap occurs in the contact portion between the orifice and the orifice retainer,
この隙間から加圧空気が漏れるのをOリングが防止することとなる。 From this gap the pressurized air from leaking so that the O-ring is prevented.

【0018】 [0018]

【実施例】以下、本発明の第1実施例について、図1を参照しながら説明する。 EXAMPLES Hereinafter, the first embodiment of the present invention will be described with reference to FIG.

【0019】図に示すように、円錐筒部1と円筒部2を滑らかに結んでラッパ状のベンチュリー3が形成されており、その円錐筒部1側開口端部の内周部には、全周を3等分した位置のそれぞれから突起3A(図では1箇所のみ図示)を内方に向けて突設し、これらの突起3Aに略円錐筒状のオリフィス4の外周を当接させて、円錐筒部1とオリフィス4との間に環状の隙間を形成している。 As shown in the figure, and horn-shaped venturi 3 is formed by connecting the tapered tubular portion 1 and the cylindrical portion 2 smooth, the inner peripheral portion of the tapered tubular portion 1 side opening end portion, the total (in Figure only one location shown) projections 3A from each of the three equally divided positions in the circumferential toward the inwardly projecting, and abutted against so the outer periphery of the substantially conical tubular orifice 4 to the projections 3A, forming an annular gap between the tapered tubular portion 1 and the orifice 4. また突起3Aは、その高さが0.2〜0.5mm程度の寸法に形成されており、これによって環状の隙間Aも0.2〜0.5mm程度の狭いものとしている。 The projections 3A is in its height is formed in dimensions of approximately 0.2 to 0.5 mm, and thereby narrow the order of even gap A circular 0.2 to 0.5 mm. またオリフィス4は、後端部を円環状のオリフィス押さえ4Aによって、円錐筒部1側に押し付け固定されている。 The orifice 4 is by the orifice holding 4A annular rear end portion, and is fixed pressed against the tapered tubular portion 1 side. そして、オリフィス4およびベンチュリー3の外側には、オリフィス押さえ4Aの外周部を固定するとともに、オリフィス4およびベンチュリー3を囲む箱状の圧力チャンバー5が設けられており、さらにこの圧力チャンバー5 And, on the outside of the orifice 4 and venturi 3, to fix the outer circumferential portion of the orifice holding 4A, the orifices 4 and venturi 3 is a box-shaped pressure chamber 5 is provided which surrounds the further pressure chamber 5
と接続された接続管7を通して圧力チャンバー5内部に加圧空気を供給する加圧空気供給手段である送風機(図示せず)が設けられている。 The pressure chamber 5 inside the pressurized air is compressed air supply means for supplying a blower (not shown) is provided through the connection connection pipe 7 and.

【0020】上記のように構成された誘引送風装置において、そのオリフィス4の吸込口8を室内(図示せず) [0020] In constructed induced draft device as described above, (not shown) the suction port 8 of the orifice 4 Indoor
と連通させるとともに、ベンチュリー3の吐出口9を室外(図示せず)と連通させておき、送風機で500〜5 And with communicating, leave communicates the discharge port 9 of the venturi 3 outdoor (not shown), with the blower 500-5
000Paに加圧した一次空気10を圧力チャンバー5 The pressure chamber 5 pressurized primary air 10 to 000Pa
内部に送り込むと、この一次空気10は環状の隙間Aを通過する際にその風速が高められてベンチュリー3内部の吐出口9側に吹き出される。 When fed to the inside, the primary air 10 is blown into the wind speed is increased venturi 3 inside the discharge port 9 side when passing through the clearance A cyclic. これによって、ベンチュリー3内部およびオリフィス4内部に誘引作用が発生し、室内の空気が吸込口8から吸い込まれていき、オリフィス4およびベンチュリー3内部を通過して吐出口9 Thus, it occurs attract acting within venturi 3 inside and the orifice 4, the air in the room will be sucked from the suction port 8 passes through the internal orifice 4 and venturi 3 discharge port 9
から室外へ排出される。 It is discharged to the outside from. そして、この送風作用は、コアンダ効果によって、一次空気10の吹き出し音を上げることなく、換気効率が向上する。 Then, the blowing effect, the Coanda effect, without increasing the blow-out sound of the primary air 10, thereby improving ventilation efficiency. さらに3個の突起を介してオリフィス4をオリフィス押さえ4Aでベンチュリー3に押し付けることによって、環状の隙間Aを形成しているので、隙間Aの寸法に影響するベンチュリー3およびオリフィス4等の個々の構成部品の寸法精度にバラツキがあっても、ベンチュリー3の円錐筒部1の内壁からオリフィス4の外周面が離れて環状の隙間Aが広がったり、ベンチュリー3の円錐筒部1の内壁にオリフィス4の外周面が部分接触したりすることがなく、隙間Aを0.2〜0.5mm程度の狭い間隔で均一に確保することができる。 By pressing the venturi 3 in the orifice holding 4A orifice 4 through an additional three projections, so to form an annular gap A, the individual construction of such venturi 3 and the orifice 4 will affect the size of the gap A even if there are variations in the components of the dimensional accuracy, or widened gap a cyclic apart outer peripheral surface of the orifice 4 from the inner wall of the tapered tubular portion 1 of the venturi 3, the inner wall of the conical tubular part 1 of the venturi 3 orifices 4 without outer peripheral surface or partial contact, it is possible to uniformly ensure clearance a at narrow intervals of about 0.2 to 0.5 mm.

【0021】このように本発明の第1実施例の誘引送風装置によれば、ベンチュリー3およびオリフィス4等の個々の構成部品の寸法精度を極度に高めなくても、また高度な組み立て技術を用いなくても、環状の隙間Aを0.2〜0.5mm程度の狭い間隔で均一に確保することができる。 According to the induced draft device of the first embodiment of the present invention as described above, even without extremely increasing the dimensional accuracy of individual components, such as venturi 3 and the orifice 4, also using sophisticated assembly techniques without, it can be uniformly secured an annular gap a at narrow intervals of about 0.2 to 0.5 mm.

【0022】つぎに本発明の第2実施例について図2および図3を参照しながら説明する。 [0022] Next, a second embodiment of the present invention with reference to FIGS. 2 and 3 will be described. なお、上記第1実施例と同一構成要素には同一符号を付し、その説明は省略する。 The above are denoted by the same reference numerals in the first embodiment and the same components, and a description thereof will be omitted.

【0023】本実施例は上記第1実施例に対し、突起3 [0023] The present embodiment is to the first embodiment, the projections 3
Aの形状を環状の隙間Aを流れる一次空気10の進行方向に対して、その長軸側がほぼ平行に位置する流線形とした点に特徴がある。 The shape of A to the traveling direction of the primary air 10 flowing through the gap A of the annular, is characterized in that the streamlined its long shaft is positioned substantially parallel.

【0024】上記構成により、環状の隙間Aを均一に確保する突起3Aの長さを長くしてその効果を高めても、 [0024] With the above structure, even enhance the effect by increasing the length of the projection 3A uniformly ensured annular gap A,
環状の隙間Aを流れる一次空気10は、その進行方向を突起3Aによって乱されることなく、効率よくベンチュリー3内部に吹き出されることとなる。 Primary air 10 flowing through the gap A of the annular, without being disturbed by the traveling direction projections 3A, so that the blown inside efficiently venturi 3.

【0025】このように本発明の第2実施例の誘引送風装置によれば、環状の隙間Aを流れる一次空気10の流動性を損なうことなく、環状の隙間Aの均一性を向上させることができる。 [0025] According to the induced draft device of the second embodiment of the present invention, without impairing the flow properties of the primary air 10 flowing through the annular gap A, to improve the uniformity of the annular gap A it can.

【0026】つぎに本発明の第3実施例について図4を参照しながら説明する。 [0026] Next a third embodiment of the present invention will be described with reference to FIG. 4 for. なお、上記第1実施例と同一構成要素には同一符号を付し、その説明は省略する。 The above are denoted by the same reference numerals in the first embodiment and the same components, and a description thereof will be omitted.

【0027】本実施例は上記第1実施例に対し、オリフィス4とオリフィス押さえ4Aとの当接部を、その曲率半径の中心がベンチュリー3の円錐筒部1の中心軸上に位置する球面形状に形成した点に特徴がある。 [0027] This embodiment described above with respect to the first embodiment, the spherical shape of the contact portion between the orifice 4 and the orifice holding 4A, the center of radius of curvature located on the central axis of the tapered tubular portion 1 of the Venturi 3 it is characterized in that formed on.

【0028】上記構成により、オリフィス押さえ4Aでオリフィス4をベンチュリー3側に押し付け固定する際、当初、オリフィス4の中心軸がベンチュリー3の円錐筒部1の中心軸に対し若干の傾きをもって組み付けられても、オリフィス4が突起3Aに当接したとき、オリフィス4とオリフィス押さえ4Aとの当接部でオリフィス4とオリフィス押さえ4Aとが球面移動して調芯し、 [0028] With the above structure, when fixing presses the orifice 4 into venturi 3 side orifice retainer 4A, initially, with the central axis of the orifice 4 are assembled with a slight inclination with respect to the central axis of the tapered tubular portion 1 of the Venturi 3 also, when the orifice 4 is in contact with the projection 3A, and the orifice 4 and then the orifice holding 4A spherical movement alignment at the contact portion between the orifice 4 and the orifice holding 4A,
オリフィス4の中心軸が円錐筒部1の中心軸と容易に合致することとなる。 The central axis of the orifice 4 is possible to easily coincide with the central axis of the tapered tubular portion 1.

【0029】このように本発明の第3実施例の誘引送風装置によれば、組み立て当初、ベンチュリー3の円錐筒部1の中心軸とオリフィス4の中心軸とが一致せずに組み付けられても、無理なく均一な環状の隙間Aを形成することができるので、その組み立て作業性を大幅に向上させることができる。 According to the induced draft device of the third embodiment of the present invention as described above, the assembly initially be assembled without match the central axis of the orifice 4 of the tapered tubular portion 1 of the Venturi 3 , it is possible to form the gap a of reasonably uniform annular, it is possible to greatly improve the assembling workability.

【0030】つぎに本発明の第4実施例について図5を参照しながら説明する。 [0030] Next, a fourth embodiment of the present invention will be described with reference to FIG. なお、上記第1実施例と同一構成要素には同一符号を付し、その説明は省略する。 The above are denoted by the same reference numerals in the first embodiment and the same components, and a description thereof will be omitted.

【0031】本実施例は上記第1実施例に対し、オリフィス4とオリフィス押さえ4Aの当接部となるそれぞれの面に環状の溝13を設け、これらの溝13で弾性材からなるOリング12を挟持し、このOリング12を介してオリフィス押さえ4Aでオリフィス4をベンチュリー3側に押し付け固定した点に特徴がある。 [0031] This embodiment to the first embodiment, an annular groove 13 provided on each side of the contact portion of the orifice 4 and the orifice holding 4A, O-ring made of an elastic material in the grooves 13 12 the sandwich is characterized orifices 4 in the orifice holding 4A through the O-ring 12 in that the fixed pressed against the venturi 3 side.

【0032】上記構成により、組み立て時にオリフィス4とオリフィス押さえ4Aとの当接部にごみ等の異物が挟まったり、また当接部自体の平面度が悪く、オリフィス4とオリフィス押さえ4Aとの間に隙間が発生し、この隙間から加圧空気10が漏れるのをOリング12が防止することとなる。 [0032] With the above structure, or caught foreign matter such as dust into the contact portion between the orifice 4 and the orifice holding 4A upon assembly, also poor flatness of the contact portion itself, between the orifice 4 and the orifice holding 4A gap is generated, that the pressurized air 10 through the gap leaks so that the O-ring 12 is prevented.

【0033】このように本発明の第4実施例の誘引送風装置によれば、オリフィス4とオリフィス押さえ4Aとの当接部に隙間が発生し、この隙間から加圧空気10が漏れ、誘引送風装置の性能が低下するのを確実に防止することができる。 [0033] According to the induced draft device of the fourth embodiment of the present invention, a gap is generated in the contact portion between the orifice 4 and the orifice holding 4A, the pressurized air 10 leaking from the gap, induced draft performance of the device can be reliably prevented.

【0034】なお、実施例では突起3Aをベンチュリー3の円錐筒部1に設けたが、オリフィス4外周部に設けてもよく、その作用効果に差異を生じない。 [0034] While in the embodiment provided with projections 3A to the tapered tubular portion 1 of the venturi 3, may be provided in the orifice 4 an outer peripheral portion, no difference in its function and effect.

【0035】 [0035]

【発明の効果】以上の実施例から明らかなように、本発明によれば環状の隙間の寸法に影響を及ぼすベンチュリーおよびオリフィス等の個々の構成部品の寸法精度を上げなくとも、この隙間に設けられた複数の突起によって、環状の隙間を狭く、かつ均一にさせることのできる誘引送風装置が提供できる。 As apparent from the above embodiment according to the present invention, without increasing the dimensional accuracy of the individual components of such annular gap venturi and orifice affects the size of the according to the present invention, provided in the gap a plurality of projections which are narrow annular gap, and induced draft device capable of uniform can be provided.

【0036】また、突起の形状を環状の隙間を流れる空気の進行方向に対して、その長軸側がほぼ平行に位置する流線形とすることによって、隙間を流れる加圧空気の流動性を損なうことなく、環状の隙間の均一性を高めることができる。 Further, the shape of the projection to the traveling direction of the air flowing through the gap between the annular by a streamlined its long shaft is positioned substantially parallel, compromising the fluidity of the pressurized air flowing through the gap no, it is possible to enhance the uniformity of the annular gap.

【0037】また、オリフィスとオリフィス押さえとの当接部を、その曲率半径の中心がベンチュリーの円錐筒部の中心軸上に位置する球面形状に形成することによって、組み立て工程の当初、ベンチュリーの円錐筒部の中心軸とオリフィスの中心軸とが一致していない場合にも、無理なく環状の隙間を形成することができるので、 Further, by forming the contact portion between the orifice and the orifice holding, the spherical center of radius of curvature located on the central axis of the tapered tubular portion of the venturi, the initial assembly process, conical venturi even when the central axis of the orifice of the cylindrical portion does not match, it is possible to form a reasonably annular gap,
その組み立て作業性を大幅に向上させることができる。 The assembly workability can be greatly improved.

【0038】また、オリフィスとオリフィス押さえとの当接部に弾性材で形成したOリングを介在させることによって、オリフィスとオリフィス押さえとの当接部に隙間が発生し、この隙間から加圧空気が漏れ、誘引送風装置の性能が低下するのを確実に防止することができる。 Further, by interposing an O-ring formed of an elastic material the contact portion between the orifice and the orifice holding a gap occurs in the contact portion between the orifice and the orifice holding, pressurized air from the gap leakage, the performance of the induced draft device can be reliably prevented.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の第1実施例の誘引送風装置の側断面図 Side cross-sectional view of the induced draft device of the first embodiment of the present invention; FIG

【図2】同第2実施例の誘引送風装置のベンチュリーおよびオリフィスの側断面図 Figure 2 is a side cross-sectional view of the venturi and the orifice of the induced draft apparatus of the second embodiment

【図3】同第2実施例の誘引送風装置のベンチュリーの背面図 Figure 3 is a rear view of the venturi of the induced draft apparatus of the second embodiment

【図4】同第3実施例の誘引送風装置の側断面図 Figure 4 is a side cross-sectional view of induced draft apparatus of the third embodiment

【図5】同第4実施例の誘引送風装置の側断面図 Figure 5 is a side cross-sectional view of induced draft apparatus of the fourth embodiment

【図6】従来の誘引送風装置の側断面図 Figure 6 is a side cross-sectional view of a conventional induced draft device

【符号の説明】 DESCRIPTION OF SYMBOLS

A 環状の隙間 1 円錐筒部 2 円筒部 3 ベンチュリー 3A 突起 4 オリフィス 4A オリフィス押さえ 5 圧力チャンバー 6 ケース 12 Oリング Gap 1 tapered tubular portion second cylindrical portion of the A ring 3 venturi 3A projection 4 orifices 4A orifice retainer 5 pressure chamber 6 Case 12 O-ring

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 円錐筒部と円筒部を滑らかに結んだラッパ状のベンチュリーと、このベンチュリーの円錐筒部側開口端部の内側に位置して、その外周部と円錐筒部との間に環状の隙間を形成するオリフィスと、このオリフィスの後端部に当接し、前記オリフィスを前記ベンチュリーに押し付け固定するオリフィス押さえと、このオリフィス押さえを固定するとともに、前記ベンチュリーおよび前記オリフィスを囲み、これらの外側に形成される箱状の圧力チャンバーと、この圧力チャンバー内部に加圧空気を供給する加圧空気供給手段とを備え、前記環状の隙間はこの隙間に設けられた複数の突起によって均一に確保されてなる誘引送風装置。 And 1. A tapered tubular portion and the cylindrical portion smoothly connecting it trumpet shape of venturi, positioned inside the tapered tubular portion opening end portion of the venturi, between its outer periphery and a tapered tubular portion an orifice to form an annular gap, in contact with the rear end of the orifice, the orifice hold-down for securing pressing the orifice into the venturi, to fix the orifice holding surrounds the venturi and the orifice, these comprising a box-shaped pressure chamber formed outside, and a pressurized air supply means for supplying pressurized air to the internal pressure chamber, the annular gap is uniformly ensured by a plurality of projections provided in the gap It is formed by attracting blower.
  2. 【請求項2】 突起の形状を環状の隙間を流れる空気の進行方向に対して、その長軸側がほぼ平行に位置する流線形とした請求項1記載の誘引送風装置。 Wherein the shape of the projection to the traveling direction of the air flowing through the gap between the annular, induced draft device according to claim 1, wherein the streamlined its long shaft is positioned substantially parallel.
  3. 【請求項3】 オリフィスとオリフィス押さえとの当接部をその曲率半径の中心がベンチュリーの円錐筒部の中心軸上に位置する球面形状に形成した請求項1または2 3. A process according to claim orifice and the center of the contact portion a radius of curvature of the orifice retainer is formed in a spherical shape, located on the central axis of the tapered tubular portion of the venturi 1 or 2
    記載の誘引送風装置。 Induced draft device as claimed.
  4. 【請求項4】 オリフィスとオリフィス押さえとの当接部に弾性材で形成したOリングを介在させた請求項1または2記載の誘引送風装置。 4. orifice and induced draft apparatus according to claim 1 or 2, wherein an O-ring formed of an elastic material is interposed at the contact portion of the orifice retainer.
JP6960993A 1993-03-29 1993-03-29 Induced blast device Granted JPH06280800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6960993A JPH06280800A (en) 1993-03-29 1993-03-29 Induced blast device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6960993A JPH06280800A (en) 1993-03-29 1993-03-29 Induced blast device

Publications (1)

Publication Number Publication Date
JPH06280800A true JPH06280800A (en) 1994-10-04

Family

ID=13407771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6960993A Granted JPH06280800A (en) 1993-03-29 1993-03-29 Induced blast device

Country Status (1)

Country Link
JP (1) JPH06280800A (en)

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