JPS6330909Y2 - - Google Patents

Description

【考案の詳細な説明】 この考案は、簡単な構造変更だけで空力・騒音
特性を向上させた新規のプロペラフアンを応用し
た換気扇に関するものである。[Detailed description of the invention] This invention relates to a ventilation fan that uses a new propeller fan that improves aerodynamics and noise characteristics through simple structural changes.

この新規プロペラフアンとは、従来のプロペラ
フアンでは無駄に捨て去られていた速度エネルギ
分に着目し、吹出側付近のわずかな形状変更だけ
でこの速度エネルギの相当量を静圧に変換するこ
とにより特性を向上させたものである。具体的に
は吹出側に円板と円板リングで遠心デイフユーザ
風路を形成したもので、その形状寸法や羽根車と
の位置関係を最適化させることにより、騒音特性
（一般に単位風量・風圧あたりの騒音レベルであ
る比騒音レベルK_Sで表わされ、同一騒音の場合
には静圧特性の向上と騒音特性の向上は等価であ
る。）にして５〜10dB，Ａも低減させることがで
きる。また換気扇に応用した場合には、強い横風
が吹いた場合でも従来品のように風量が激減して
しまうこともなく、たえず安定して換気すること
ができるという長所も持つている。 This new propeller fan focuses on the velocity energy that was wasted in conventional propeller fans, and converts a considerable amount of this velocity energy into static pressure with just a slight change in the shape near the outlet side. It has improved characteristics. Specifically, a centrifugal diffuser air path is formed on the outlet side using a disc and a disc ring, and by optimizing its shape and dimensions and its positional relationship with the impeller, the noise characteristics (generally per unit air volume and wind pressure) are improved. It is expressed by the specific noise level K _S , which is the noise level of 100 kHz, and in the case of the same noise, improvements in static pressure characteristics and improvements in noise characteristics are equivalent.), and can be reduced by 5 to 10 dB.A. . Furthermore, when applied to a ventilation fan, it has the advantage that even when a strong crosswind blows, the air volume does not decrease drastically unlike conventional products, allowing constant and stable ventilation.

さて、従来の防虫網付きの換気扇は、本体枠の
室外側開口部に防虫網を取付ける場合が多かつた
が、この場合、防虫網による圧力損失のため、風
量の低下、騒音の増加があつた。また防虫網の清
掃等も本体枠を取りはずさなければならないなど
の欠点もあつた。 Now, in conventional ventilation fans with an insect screen, the insect screen is often attached to the outdoor opening of the main body frame, but in this case, the air volume decreases and noise increases due to pressure loss due to the insect screen. Ta. Another drawback was that the main body frame had to be removed to clean the insect screen.

この考案は、換気扇の防虫網を、デイフユーザ
風路開口部の風速の低い所に取付けることによ
り、防虫網による圧力損失が少なく騒音値の低い
換気扇を得ることを目的としている。 The purpose of this invention is to provide a ventilation fan with low pressure loss due to the insect screen and a low noise level by attaching the insect screen of the ventilation fan to a portion of the diffuser air passage opening where the wind speed is low.

第１図は、この考案の一実施例を示す断面図で
ある。図において、１は室内側、室外側を開通す
る開口部、２は開口部１に埋め込まれた換気ダク
ト、３はこの換気ダクト２に内接する円筒状の本
体枠、４は本体枠３の室内側端面に結合され、本
体枠の外径とほゞ同一の円形穴を有する円形リン
グ状の第１の風路部材、５は本体枠３内にこれと
同軸に設けられた駆動モータ、６は駆動モータ取
付足、７は駆動モータ５により回転駆動されるプ
ロペラフアンで、この羽根車の吹出側軸方向寸法
の一部は前記第１の風路部材４より屋内側に突出
させている。８は前記第１の風路部材４と外径が
ほゞ同一であり、第１の風路部材４と平行に取付
けられた円板状の第２の風路部材、９は第１の風
路部材４と第２の風路部材８により形成された遠
心デイフユーザ風路、１０はこのデイフユーザ風
路９の開口部に設けられた防虫網である。 FIG. 1 is a sectional view showing an embodiment of this invention. In the figure, 1 is an opening that communicates between the indoor side and the outdoor side, 2 is a ventilation duct embedded in the opening 1, 3 is a cylindrical main body frame inscribed in this ventilation duct 2, and 4 is a chamber of the main body frame 3. a circular ring-shaped first air passage member that is coupled to the inner end surface and has a circular hole that is approximately the same as the outer diameter of the main body frame; 5 is a drive motor provided within the main body frame 3 coaxially therewith; 6 is a The drive motor mounting leg 7 is a propeller fan which is rotationally driven by the drive motor 5, and a part of the axial dimension of this impeller on the blowing side protrudes from the first air path member 4 toward the indoor side. Reference numeral 8 denotes a disc-shaped second air passage member having substantially the same outer diameter as the first air passage member 4 and installed in parallel with the first air passage member 4; 9 denotes a first air passage member; A centrifugal diffuser air passage is formed by the passage member 4 and the second air passage member 8, and 10 is an insect screen provided at the opening of this diffuser air passage 9.

以上のように構成された換気扇では、防虫網１
０による圧力損失が少なく、また遠心デイフユー
ザ風路９により静圧特性を向上させているため比
騒音レベルが低く騒音値も低い。 In the ventilation fan configured as above, the insect screen 1
Since the pressure loss due to 0 is small and the static pressure characteristics are improved by the centrifugal diffuser air passage 9, the specific noise level is low and the noise value is also low.

第２図は、第２の風路部材８と防虫網１０を連
結部材により一体とした実施例であり、ａはその
斜視図、ｂはその着脱方法を示す断面図である。
図において、１１は連結部材で第２の風路部材８
と連結部材１１は一体成形されており、第２の風
路部材外周と連結部材により形成される平面は、
防虫網１０で覆われている。また、連結部材１１
の内側外周部には第１の風路部材４の外周部に設
けられているひつかけ部４−ａに勘合するひつか
け部８−ａを有しており第２の風路部材は着脱自
在になつている。この様に構成することによつ
て、防虫網１０による圧力損失が少ないだけでな
く、清掃が容易であり、かつ第２の風路部材は防
虫網と化粧グリルの役目を果たすこともできる。 FIG. 2 shows an embodiment in which the second air passage member 8 and the insect screen 10 are integrated by a connecting member, and FIG.
In the figure, 11 is a connecting member that connects the second air path member 8.
and the connecting member 11 are integrally molded, and the plane formed by the outer periphery of the second air path member and the connecting member is
It is covered with an insect screen 10. In addition, the connecting member 11
It has a hanging part 8-a on the inner peripheral part thereof which fits into a hanging part 4-a provided on the outer peripheral part of the first air passage member 4, and the second air passage member is detachable. It's getting old. With this configuration, not only the pressure loss caused by the insect screen 10 is small, but also cleaning is easy, and the second air passage member can also serve as an insect screen and a decorative grill.

なお、第２の風路部材の外周形状は円形である
場合を説明したが、これは四角形でもそれ以外の
形状でも効果は同等であるので、デザイン等によ
り形状を決定すればよい。 In addition, although the case where the outer peripheral shape of the second air passage member is circular has been described, the effect is the same whether it is square or any other shape, so the shape may be determined based on the design or the like.

この考案は以上説明したとうり、換気扇の防虫
網をデイフユーザ風路開口部の風速の低い所に取
付けたので、防虫網による圧力損失が少なく、ま
た騒音値の低い換気扇が得られるという効果があ
る。 As explained above, this invention has the effect that the insect screen of the ventilation fan is attached to the opening of the diffuser air passage where the wind speed is low, so there is less pressure loss due to the insect screen, and a ventilation fan with low noise level can be obtained. .

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す断面図であ
り、第２図は、他の実施例を示すものであり、ａ
はその一部斜視図、ｂはその部分断面図である。 図において、１は開口部、２は換気ダクト、３
は本体枠、４は第１の風路部材、５は駆動モー
タ、７はプロペラフアン、８は第２の風路部材、
９は遠心デイフユーザ風路、１０は防虫網であ
る。なお、図中同一符号は、同一または相当部分
を示す。 FIG. 1 is a sectional view showing one embodiment of this invention, and FIG. 2 is a sectional view showing another embodiment.
is a partial perspective view thereof, and b is a partial sectional view thereof. In the figure, 1 is an opening, 2 is a ventilation duct, and 3
is a main body frame, 4 is a first air path member, 5 is a drive motor, 7 is a propeller fan, 8 is a second air path member,
9 is a centrifugal diffuser air passage, and 10 is an insect screen. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

【実用新案登録請求の範囲】 (1) 室内、室外の仕切部材を開通する開口部に埋
め込まれた換気ダクト、この換気ダクトに内接
するように設けられた本体枠、この本体枠内に
設けられた駆動モータ、上記本体枠の吹出側端
面に結合されたリング状の第１の風路部材、上
記第１の風路部材と平行に吹出側に設けられた
第２の風路部材、この両風路部材により形成さ
れる遠心デイフユーザ風路の開口部を覆う防虫
網、上記駆動モータにより回転駆動され、かつ
羽根車の吹出側軸方向寸法の一部を、上記第１
の風路部材より吹出側に突出するプロペラフア
ンを備えた換気扇。 (2) 第２の風路部材、防虫網とを連結部材により
一体としたことを特徴とする実用新案登録請求
の範囲第１項記載の換気扇。[Scope of Claim for Utility Model Registration] (1) A ventilation duct embedded in the opening that opens the indoor/outdoor partition member, a main body frame provided so as to be inscribed in this ventilation duct, and a main body frame provided within this main body frame. a ring-shaped first air duct member coupled to the outlet side end face of the main body frame; a second air duct member provided on the outlet side parallel to the first air duct member; An insect screen that covers the opening of the centrifugal diffuser air passage formed by the air passage member, which is rotatably driven by the drive motor and whose axial dimension on the blowing side of the impeller is
A ventilation fan equipped with a propeller fan that protrudes from the air passage member to the outlet side. (2) The ventilation fan according to claim 1 of the utility model registration claim, characterized in that the second air passage member and the insect screen are integrated by a connecting member.