JPS63183332A - Air cleaner - Google Patents

Abstract

PURPOSE:To avoid a large size of the device and increase the air flow capacity with low cost and reduce noises by providing fan main vanes which are equally arranged in a vortex chamber which is outside of the open bore of an air blow ing port and providing auxiliary vanes extended towards the center of the fan with a most balanced arrangement of vanes the number of which is smaller than the number of the main vanes by an odd number of vanes. CONSTITUTION:Small particles ionized among a high tension discharge line 6 and counter electrodes 8 after passing through a front grill 4 and prefilter 5 are arrested by a filter 3 to give clean air. The clean air is sucked in by a fan 21 from a blowing-in port 9a. On the basis of sirocco fan 48 main vanes 21a which are of the same shape and same number are arranged on a circle equally, and 13 auxiliary vanes 21b given by subtracting from the number of the main vanes vanes an odd number 35 are arranged with highest balance and provided by extending from the main vanes 21a. The air flow capacity increases with the increase in the number of the auxiliary vanes 21b, and they are most effective when 13 auxiliary vanes are provided with an increase of about 9 %. Looking at the sound pressure level of noises, it shows that 13 and 15 auxiliary vanes present a lower sound than conventional fans.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は家庭用、自動車用等に用いられ、室内の汚れ
た空気を吸い込み浄化して循環させる空気清浄機に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to an air cleaner that is used for home use, automobiles, etc., and sucks in indoor dirty air, purifies it, and circulates it.

従来の技術 従来この種の空気清浄機は、例えば第１１図のような構
造になっていた。2. Description of the Related Art Conventionally, this type of air cleaner has had a structure as shown in FIG. 11, for example.

すなわち本体前１と本体後２とで箱体を形成し、上面に
は挿脱可能なフィルター３が配置されている。４は前面
に多数の空気吸込み穴を有するフロントグリルで本体前
に取付けられる。６は比較的粒子の大きい埃をキャッチ
するプレフィルタ−１６は高電圧が印加される放電線、
７は放電線カバー、８は対向電極板で、プレフィルタ−
５を通過してきた微粒子をイオン化させて、帯電体を有
するフィルター３で捕集させる。９は本体後２とで渦室
１０を形成する隔壁で、吹込み口９ａを開口し、この吸
込み口９ａの開口中心に向い延出する複数の腕部９ｂに
ファン１１を固定した駆動モータ１２が取付けられてい
る。そしてこのファン１１は、第１ｏ図にも示す様に多
数の羽根１１ａが、前記隔壁９の吸込み口９ａの外方の
渦室１ｏ内に位置するようにして、円周上に等分配置し
て設けられている。さて、この構成において動作させる
と、駆動モータ１２によってファン１１が回転され、室
内の汚れた空気は前述の様に、フロントグリル４．プレ
フィルタ−５を通過し、脱臭剤等をも配したフィルター
３で清浄空気にされ吸込み口９ａから渦室１ｏ内に導び
かれて排気口（図示せず）より機外へ送出される。That is, the front body 1 and the rear body 2 form a box, and a removable filter 3 is arranged on the top surface. 4 is a front grill that has many air intake holes on the front and is attached to the front of the main body. 6 is a pre-filter that catches relatively large particles of dust; 16 is a discharge wire to which a high voltage is applied;
7 is a discharge wire cover, 8 is a counter electrode plate, and a pre-filter.
The fine particles passing through the filter 5 are ionized and collected by the filter 3 having a charged body. Reference numeral 9 denotes a partition wall that forms a vortex chamber 10 with the rear body 2, which has an air inlet 9a opened therein, and a drive motor 12 with a fan 11 fixed to a plurality of arms 9b extending toward the center of the opening of the air inlet 9a. is installed. As shown in FIG. 1o, this fan 11 has a large number of blades 11a arranged equally on the circumference so that they are located inside the vortex chamber 1o outside the suction port 9a of the partition wall 9. It is provided. Now, when this configuration is operated, the fan 11 is rotated by the drive motor 12, and the dirty air in the room is pumped through the front grill 4. The air passes through a pre-filter 5, is purified by a filter 3 containing a deodorizing agent, etc., is guided into the vortex chamber 1o through the suction port 9a, and is sent out of the machine through the exhaust port (not shown).

発明が解決しようとする問題点 しかし、この様な構造のものでは次の様な問題点があっ
た。つまり、この種の空気清浄機ではできるだけ短時間
に室内空気を浄化させる性能が望まれ、そのためにはフ
ァンによる風量（ｍ／分）を向上させることが必要とな
るが、主としてフィルター３を通過するときの圧損に抗
して、風量を増すためには、周知の如くファン１１の径
Ａや羽根１１ａの高さＢを大きくし、羽根１１ａの形状
や枚数を最適に設定する手段があるが、本体が大形化し
、原価的にも不利となる。一方駆動モータ１２の出力を
増大してファン１１の回転数を高くすれば、比例して騒
音が増大してしまう結果となり苦慮するものであった。Problems to be Solved by the Invention However, such a structure has the following problems. In other words, this type of air purifier is desired to have the ability to purify indoor air in the shortest possible time, and to achieve this, it is necessary to increase the air volume (m/min) by the fan, but mainly the air that passes through the filter 3 In order to resist the pressure loss and increase the air volume, as is well known, there is a method of increasing the diameter A of the fan 11 and the height B of the blades 11a, and optimizing the shape and number of blades 11a. The main body becomes larger, which is disadvantageous in terms of cost. On the other hand, if the output of the drive motor 12 is increased to increase the rotational speed of the fan 11, the noise will increase proportionally, which is a problem.

そして騒音はその音圧レベルと共に聴感において特定の
周波数帯域で耳ぎわすな異常音として感じられる不快な
音がでやすいものであった。これはファン１１の羽根数
Ｚと回転数ＮとによるＮ−Ｚ音と称されるものに起因す
ることが多い。In addition to the sound pressure level, the noise tends to produce unpleasant sounds that are perceived as harsh abnormal sounds in a specific frequency band. This is often caused by what is called NZ noise due to the number Z of blades and the number of rotations N of the fan 11.

そこで、本発明はこれらの問題点を一掃するようにした
ものである。Therefore, the present invention is intended to eliminate these problems.

藺題点を解決するための手段 そして、上記問題点を解決する本発明の技術的な手段は
、吹込み口の開口径より外方の渦室内に等分配置された
ファンの羽根（以後これを主羽根と呼ぶ）から、この主
羽根枚数から奇数枚数減じた枚数で最もバランスのとれ
た配置でファン中心に向って補助羽根を延設配置したフ
ァンとするものである。Means for Solving the ProblemsThe technical means of the present invention for solving the above problems is to use fan blades (hereinafter referred to as "fan blades") arranged equally in the vortex chamber outside the opening diameter of the air inlet. The number of auxiliary blades is subtracted by an odd number from the number of main blades (referred to as the main blade) to create a fan with auxiliary blades extending toward the center of the fan in the most balanced arrangement.

作　　　用 この技術的手段による作用は次の様になる。For production The effect of this technical means is as follows.

すなわち、主羽根から延設した補助羽根を吹込み口の開
口内へ臨ますことにより、この補助羽根で先ず吹込み空
気をとらえて連設する主羽根部へ積極的に送風すること
となり風量槽と成し得ると共に、この補助羽根枚数は主
羽根枚数から奇数枚数除いて設けたため、主羽根が隅数
枚のとき奇数枚数、主羽根が奇数枚数のとき偶数枚数と
なり、同一ファン上の補助羽根と主羽根部とで空気の流
れに変化をひき起して耳ぎわすな異常音をしずめて聞き
やすい音にし騒音を低下させるようＫなるのである。In other words, by placing the auxiliary blades extending from the main blades into the opening of the air inlet, the auxiliary blades first catch the blown air and actively send it to the connected main blades. At the same time, the number of auxiliary blades is an odd number subtracted from the number of main blades, so when the number of main blades is in the corner, it is an odd number, and when the number of main blades is an odd number, it is an even number. This causes a change in the airflow between the main vane and the main blade, which quiets the annoying abnormal noise and makes it easier to hear, reducing the noise level.

実施例 以下、本発明の一実施例を添付図面にもとすいて説明す
る。尚第１１図と同一部材には同一符号を用いた。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the accompanying drawings. Note that the same reference numerals are used for the same members as in FIG. 11.

第２図において、フロントグリル４．プレフィルタ−５
を通り高圧の放電線６と対向電極８の間でイオン化され
た微粒子をフィルター３で捕集し浄化された空気が吹込
み口９ａからファン２１によって吸引される。このファ
ン２１は第１図に示す様に、従来例第１０図に示す一般
的なシロッコファン１１を基本にして羽根１１ａと同一
形状で同数の主羽根２１ａを４８枚円周上に等分配置し
、この主羽根枚数から奇数枚数の３０枚を除いて１３枚
の補助羽根２１ｂをファン２１の中心に向って最もバラ
ンスよく配置して主羽根２１＆から延設させている。尚
この補助羽根２１ｂは三角形状をしているが、三角形状
に限定するものではない。In FIG. 2, front grill 4. Prefilter-5
The filter 3 collects ionized particles between the high-voltage discharge wire 6 and the counter electrode 8, and the purified air is sucked in by the fan 21 from the air inlet 9a. As shown in FIG. 1, this fan 21 is based on the general sirocco fan 11 shown in the conventional example shown in FIG. However, excluding the odd number of 30 blades from this number of main blades, 13 auxiliary blades 21b are arranged in the best balance toward the center of the fan 21 and extended from the main blades 21&. Although this auxiliary blade 21b has a triangular shape, it is not limited to a triangular shape.

また第３図、第４図は同様にして主羽根２１ａ４８枚か
ら奇数枚数の３７枚、３３枚を除いて、補助羽根２１ｂ
を１１枚、１５枚設けた例である。In addition, in FIGS. 3 and 4, the odd numbers of 37 and 33 blades are removed from the 48 blades of the main blade 21a, and the auxiliary blades 21b are
This is an example in which 11 and 15 sheets are provided.

この３種の例でわかる様に外周の主羽根２１ａから奇数
枚数を除いて主羽根２１ａに連ねた補助羽根２１ｂを延
設させる条件下で、最もバランスよく配置したものであ
るが、補助羽根２１ｂは等分配置になり得す円周上のバ
ランスを欠く。従って物理的な回転アンバランスはファ
ン２１として肉厚等で補正するものである。そして吹込
み口９ａに臨む補助羽根２１ｂから外周の主羽根２１ａ
に送出される空気の流れは円周上でみると常に一定でな
く変化することになる。As can be seen from these three types of examples, the auxiliary blades 21b are arranged in the most balanced manner under the condition that the auxiliary blades 21b connected to the main blade 21a are extended by removing an odd number from the main blade 21a on the outer periphery. lacks balance on the circumference, which could result in an evenly distributed arrangement. Therefore, the physical rotational imbalance is corrected by the wall thickness of the fan 21. Then, from the auxiliary blade 21b facing the air inlet 9a to the main blade 21a on the outer periphery.
The flow of air that is sent out is not always constant and changes when viewed on the circumference.

以上のような本発明の実施例のファンと比較するため第
５図、第６図、第７図に主羽根２１ａから偶数枚数を除
いて補助羽根２１ｂを最もバランス良く配置した例を示
す。即ち主羽根は４８枚とし補助羽根２１ｂはそれぞれ
４枚、８枚、１６枚としている。これらはファンとして
物理的にバランスがとれ、補助羽根２１ｂから外周の主
羽根２１ａに送出される空気の流れも円周上でみて常に
一定である点が本発明の実施例と異なる。For comparison with the fan of the embodiment of the present invention as described above, FIGS. 5, 6, and 7 show an example in which the auxiliary blades 21b are arranged in the most balanced manner by removing an even number from the main blades 21a. That is, the number of main blades is 48, and the number of auxiliary blades 21b is 4, 8, and 16, respectively. These are different from the embodiments of the present invention in that they are physically balanced as a fan, and the flow of air sent from the auxiliary blades 21b to the main blades 21a on the outer periphery is always constant when viewed on the circumference.

さて、これら補助羽根２１ｂを配置したファンと従来例
の補助羽根のないファンを取り替えて実験した結果を第
８図に示す。図において横軸は補助羽根の枚数を示し、
従来例のものは０としている。縦軸は従来例のファンを
基準として風量、騒音１回転数の増減を示している。Now, FIG. 8 shows the results of an experiment in which a fan equipped with these auxiliary blades 21b was replaced with a conventional fan without auxiliary blades. In the figure, the horizontal axis indicates the number of auxiliary blades,
The conventional example is set to 0. The vertical axis shows increases and decreases in air volume and noise per rotation speed with respect to the conventional fan.

風量は補助羽根２１ｂの枚数と共に増加し、同一ファン
の大きさで本体を大形にすることなく風量を増加する手
段として有効なことを示す。そして補助羽根を１３枚設
けたものが最も効果的で約９チの増加が可能となりその
効果は非常に大きい。The air volume increases with the number of auxiliary blades 21b, indicating that the fan is effective as a means for increasing the air volume without increasing the size of the fan body. The one with 13 auxiliary blades is the most effective and can increase the number of blades by about 9 inches, which is very effective.

一方フ７ンの回転数をみると補助羽根４枚と８枚のファ
ンは少し低下する。その低下率は約１％で微小であるが
、補助羽根で空気をとらえて送風するためで、回転数が
少し低下しても風量増の効果が大きい。補助羽根が１１
枚以上になると逆に回転数が増加している。増加率は１
〜３．５％であり補助羽根が適量の空気をとらえて主羽
根へ効率よく送出するため、この回転数の増加に伴なう
風量増が加わって補助羽根４枚、８枚の場合より風量が
増となるものと考えられる。とりわけ補助羽根１３枚の
場合は回転数の増加が約１％である反面、最高の風量増
加を達成しているのは補助羽根の主羽根への空気の送出
効率が最も良好であるためと言える。On the other hand, looking at the rotation speed of fan 7, the rotation speed of fans with 4 auxiliary blades and 8 blades decreases slightly. The rate of decrease is minute, about 1%, but this is because the auxiliary blades capture and blow air, so even if the rotation speed decreases slightly, the effect of increasing the air volume is large. 11 auxiliary blades
On the contrary, when the number of sheets exceeds 1, the number of rotations increases. The increase rate is 1
~3.5%, and since the auxiliary blades capture an appropriate amount of air and send it to the main blades efficiently, the increase in air volume due to the increase in rotational speed increases the air volume compared to when there are 4 or 8 auxiliary blades. It is thought that this will result in an increase. In particular, in the case of 13 auxiliary blades, while the increase in rotational speed is approximately 1%, the reason why the highest increase in air volume is achieved is that the auxiliary blades have the best air delivery efficiency to the main blade. .

補助羽根の主羽根数に対する割合は１３枚のとき約２７
％で、１１枚のとき約２３％であることから２０〜３０
％附近に最適枚数が存在することになる。The ratio of auxiliary blades to the number of main blades is approximately 27 when there are 13 blades.
%, it is about 23% when there are 11 sheets, so it is 20-30
The optimum number of sheets exists around %.

一方、騒音の音圧レベル［：ｄＢ］値をみると従来のフ
ァンより音の小さくなるものは、補助羽根１３枚と１６
枚である。耳で音をきくと従来ファン及び、主羽根枚数
から偶数枚数除いて補助羽根をバランスよく配置した補
助羽根４枚、８枚、１６枚のファンは何れも排気が周期
的に脈動しておりＮＺ音となって第９図に示す様に異常
なピーク（イ）が発生し耳ざわシで不快な異常音として
全体の騒音レベルを高くしている。そしてこれはファン
の羽根部を通過する空気の流れがファンの円周上一様に
なっているため一種の共振共鳴音となりやすいことに起
因する。本発明のファンは補助羽根を設け、ファンの円
周上の羽根を通過する空気の流れを変化させて、共振共
鳴音を第９図のイ′で示す様に減少させる効果を発揮す
る。そしてその音圧の周波数分布で示す様に高周波数域
においては従来ファンよシ音圧が低くなシ、ｓ　ｏ　ｏ
　Ｈｚ以下の低周波数域では少し高くなっている。これ
は補助羽根によって吹込み口からの空気をとらえ主羽根
に送出することにより空気の流れを乱しているため低い
周波数帯域での音圧増になっている。しかし聴感におい
てはこれら低周波帯域の成分は敏感に感じられないため
聴感補正をした全体の音圧レベルは従来ファンより低下
し第８図に示す様に騒音は低下し、且つ不快な異常音も
除かれて耳にききやすい音となる。On the other hand, looking at the sound pressure level [:dB] of the noise, the fans that are quieter than conventional fans have 13 auxiliary blades and 16 auxiliary blades.
It is one piece. If you listen to the sound with your ears, you will notice that the exhaust pulsates periodically for conventional fans and for fans with 4, 8, and 16 auxiliary blades, which are arranged in a well-balanced manner by removing an even number of auxiliary blades from the number of main blades.NZ As shown in FIG. 9, an abnormal peak (a) occurs as a result of the sound, and the abnormal sound is harsh and unpleasant, raising the overall noise level. This is because the flow of air passing through the blades of the fan is uniform over the circumference of the fan, which tends to cause a type of resonance sound. The fan of the present invention is provided with auxiliary blades, and by changing the flow of air passing through the blades on the circumference of the fan, it exhibits the effect of reducing resonance sound as shown by A' in FIG. 9. As shown in the frequency distribution of the sound pressure, the sound pressure is lower than that of conventional fans in the high frequency range.
It is slightly higher in the low frequency range below Hz. This is because the auxiliary blades capture the air from the inlet and send it to the main blades, disturbing the air flow, resulting in an increase in sound pressure in the low frequency band. However, in terms of hearing, these low-frequency components are not sensitively felt, so the overall sound pressure level after auditory correction is lower than that of conventional fans, and as shown in Figure 8, the noise is reduced, and there is no unpleasant abnormal sound. This removes the noise and makes the sound easier to hear.

発明の効果 以上の様に本発明は、吹込み口の口径より外方の渦室内
に等分配量した主羽根からファン中心に向って主羽根の
枚数から奇数枚数除いた数の補助羽根を最もバランスよ
く延設配置することにより、ファンの径や羽根高さを増
すことなく、従って製品も大形化せず、安価に風量を増
大させ、しかも不快な異常音をなくして騒音を低下させ
るすぐれた効果を奏する。Effects of the Invention As described above, the present invention has the advantage that the number of auxiliary blades, the number of which is the number of main blades minus an odd number, is distributed evenly in the vortex chamber outward from the diameter of the air inlet toward the center of the fan. By extending and arranging the fan in a well-balanced manner, it is possible to inexpensively increase the air volume without increasing the diameter or blade height of the fan, and therefore without increasing the size of the product, while also reducing noise by eliminating unpleasant abnormal noises. It has a great effect.

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

第１図ａは本発明の一実施例を示すファンの平面図、ｂ
はそのＣ−Ｃ断面図、第２図は同ファンを取付けた空気
清浄機の断面図、第３図、第４図は他の実施例を示すフ
ァンの平面図、第５図、第６図、第７図は本発明のファ
ンと比咬するために示す類似のファンの平面図、第８図
ａ、ｌ）、ｃはこれらファンと従来例のファンとの実験
結果の比較を表わすグラフ、第９図は騒音の周波数分析
結果を示すグラフ、第１ｏ図ａは従来例（でおけるファ
ンの平面図、ｂは断面図、第１１図はこのファンを取付
けた従来例を示す空気清浄機の断面図である。 １・・・・・・本体前、２・・・・・・本体後、３・・
・・・・フィルター、４・・・・・・フロントグリル、
９・・・・・・隔壁、９ａ・・・・・・吹込み口、１°
０・・・・・渦室、１２・・・・・・駆動モータ、２１
・・・・・ファン、２１ａ・・・・・・主羽根、２１ｂ
・・・・・・補助羽根。 代理人の氏名　弁理士　中　尾　敏　男　ほか１名第１
図　　　　　　２１−７アツ 洗−１＝］４蚕 ２ｆｂ−一一葎ｆＩ広」張 （ｂフ ィーーート）圭ＪＤ ２−−−１／　　頃 ９−・隔壁 ９、・−Ｄ尺込左旧 １０−−一渦！ １？−・−１９％ｔ〜り ２ｆ−−−７７ン 第　３　図 ２ｆの 第７図 第８図 有劾−１１猥楳秩→ １！ｉ」力羽張仄状→ 補恥翳′ｇＡ秩に→ 第９図 一−−−１．を茅７７ソリ剖砒分や □ネジ牲期ファン４盲ソ１４ド牽 凧熾款ＣＭｚ）□ ｆ５１０図 ＜’ｒｎ 第１１囚FIG. 1a is a plan view of a fan showing one embodiment of the present invention, and b
2 is a sectional view of the air purifier with the same fan installed, FIGS. 3 and 4 are plan views of the fan showing other embodiments, and FIGS. 5 and 6. , FIG. 7 is a plan view of a similar fan shown for comparison with the fan of the present invention, and FIG. 8 a, l), and c are graphs showing a comparison of experimental results between these fans and a conventional fan. Figure 9 is a graph showing the frequency analysis results of noise, Figure 1o is a plan view of a conventional fan, b is a cross-sectional view, and Figure 11 is a conventional example of an air purifier with this fan installed. It is a sectional view. 1... Main body front, 2... Main body rear, 3...
...Filter, 4...Front grill,
9... Bulkhead, 9a... Inlet, 1°
0... Vortex chamber, 12... Drive motor, 21
...Fan, 21a...Main blade, 21b
...Auxiliary blade. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 21-7 Hot wash-1 =] 4 silkworms 2 fb-11 葎 fI Hiroshi Zhang (b foot) Kei JD 2---1/ Around 9-・Bulkhead 9,・-D shaku included left old 10-- A whirlpool! 1? -・-19%t~ri2f---77n No. 3 Figure 2f Figure 7 Figure 8 Uikai-11 Obai Uchichi → 1! i'' 力波hari滄形→ 岁忳'gAちちに→ Figure 9 1 ---1. The 77th sled dissection and screw sacrificial fan 4 blind solo 14th kite towing CMz) □ f510 figure <'rn 11th prisoner

Claims (2)

【特許請求の範囲】[Claims] （１）　前面に多数の空気吸込み穴を有するフロントグ
リルを取付けた本体前と本体後とで箱体を形成し、この
箱体内にはフィルターと、このフィルター後方に吹込み
口を開口させた隔壁を配置し、この隔壁と本体後とで渦
室を形成して、駆動モータに取付けたファンを収設し、
このファンは前記吹込み口の開口径より外周の渦室内に
主羽根を等分配置し、この主羽根枚数から奇数枚数減じ
た枚数で最もバランスのとれた配置で、主羽根からファ
ン中心に向って補助羽根を延設配置した空気清浄機。(1) The front of the main unit, which has a front grill with many air intake holes on the front, and the rear of the main unit form a box, and inside this box is a filter and a bulkhead with an air inlet opening at the rear of the filter. A vortex chamber is formed between this partition wall and the rear of the main body, and a fan attached to a drive motor is housed therein.
In this fan, the main blades are arranged equally within the vortex chamber on the outer periphery of the opening diameter of the air inlet, and the most balanced arrangement is achieved by subtracting an odd number from the number of main blades. An air purifier with extended auxiliary blades. （２）　主羽根を４８枚等分配置し、この主羽根を１６
等分した位置から３箇所を除いた箇所に、前記補助羽根
を１３枚主羽根に延設配置してなる特許請求の範囲第１
項記載の空気清浄機。(2) Arrange the main blades into 48 equal parts, and divide the main blades into 16 pieces.
Claim 1, wherein the auxiliary blades are arranged extending from the 13 main blades at positions excluding three positions from the equally divided positions.
Air purifier as described in section.