JPH0386132A - Vacuum cleaner - Google Patents
Vacuum cleanerInfo
- Publication number
- JPH0386132A JPH0386132A JP22530789A JP22530789A JPH0386132A JP H0386132 A JPH0386132 A JP H0386132A JP 22530789 A JP22530789 A JP 22530789A JP 22530789 A JP22530789 A JP 22530789A JP H0386132 A JPH0386132 A JP H0386132A
- Authority
- JP
- Japan
- Prior art keywords
- dust collection
- radiator
- heat
- main body
- vacuum cleaner
- 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
Links
- 239000000428 dust Substances 0.000 claims abstract description 59
- 241000238876 Acari Species 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 230000017525 heat dissipation Effects 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 abstract description 4
- 238000009423 ventilation Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000008029 eradication Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Electric Vacuum Cleaner (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、家庭用の電気掃除機に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a household vacuum cleaner.
［従来の技術］
電気掃除機における電動送風機用の電動機をいわゆるイ
ンバータ制御すれば、ブラシレスに構成できるばかりか
、電源周波数に影響されない等の種々の特徴がある。し
かしながら、制御回路にトランジスタやサイリスタなど
の半導体の回路素子を用いるので、電気回路部の温度上
昇を防止するための放熱に特別な配慮が必要になる。こ
れに対し、従来のこの種の装置では、送風室の排気口の
近くにＬ字形のアルミニュームの放熱板を設けて、この
放熱板に回路素子を取り付ける程度で、事実上放熱対策
について配慮されていないのが実情であった。[Prior Art] If the motor for the electric blower in a vacuum cleaner is controlled by a so-called inverter, it not only can be configured brushless but also has various features such as being unaffected by the power frequency. However, since semiconductor circuit elements such as transistors and thyristors are used in the control circuit, special consideration must be given to heat dissipation to prevent the temperature of the electric circuit section from rising. On the other hand, in conventional devices of this type, an L-shaped aluminum heat sink is installed near the exhaust port of the ventilation chamber, and circuit elements are mounted on this heat sink, and virtually no consideration is given to heat radiation measures. The reality was that they were not.
［発明が解決しようとする課題］
上述したように、従来の電気掃除機では、電気回路部の
放熱対策について殆ど配慮されていなかった。このため
、電気回路部の回路素子が熱に影響されて、出力特性等
が悪くなることがあった。[Problems to be Solved by the Invention] As described above, in conventional vacuum cleaners, little consideration has been given to heat dissipation measures for the electric circuit section. For this reason, the circuit elements of the electric circuit section may be affected by heat, resulting in poor output characteristics and the like.
また、集塵室のゴミ類が溜まったりフィルタが目詰りを
起こすと、電動機の温度が高くなり回路素子に伝わって
誤動作したり制御精度が低下する等の問題点があった。Furthermore, if dust accumulates in the dust collection chamber or the filter becomes clogged, the temperature of the motor increases and is transmitted to the circuit elements, causing problems such as malfunctions and decreased control accuracy.
一方、従来集塵袋のゴミ類と共に捕集されたダニの撲滅
対策として、可撓性のチューブを本体のダニ用の接続口
に接続して温風循環流を集塵袋に加えるように構成した
ものがある。しかしながらこの装置によると、本体に特
別なダニ用の接続口を設けるので、構造が複雑になり製
作費も高くなるなどの欠点がある。On the other hand, as a measure to eradicate dust mites that are conventionally collected along with the garbage in dust collection bags, a flexible tube is connected to the connection port for dust mites on the main body to apply a circulating flow of warm air to the dust collection bag. There is something I did. However, this device has drawbacks such as a complicated structure and high manufacturing costs because the main body is provided with a special connection port for the mites.
本発明はこのような現状に着目して威されたもので、そ
の目的は、放熱効率が良く、簡単な構成でダニの撲滅機
能を備えた電気掃除機を提供することにある。The present invention was developed in view of the current situation, and an object of the present invention is to provide a vacuum cleaner with good heat dissipation efficiency, a simple structure, and a dust mite eradication function.
［課題を解決するための手段］
本発明は、電気回路部の回路素子を冷却する放熱体を集
塵室に設けると共に、この放熱体を集塵袋に接触させる
ようにした電気掃除機を構成したものである。[Means for Solving the Problems] The present invention provides a vacuum cleaner in which a heat radiator for cooling circuit elements of an electric circuit section is provided in a dust collection chamber, and this heat radiator is brought into contact with a dust collection bag. This is what I did.
［作 用］
本体の電動送風機の電動機を駆動するとファンが回転し
、床ブラシ等から吸い込まれたばかりで低温度の空気が
上流側の集塵室に設けられた放熱体の面に沿って流れる
。放熱体に沿って流れた空気は放熱体の熱を奪って搬送
しながら、送風室を通って排気口から本体の外に排出さ
れる。[Function] When the motor of the electric blower in the main unit is driven, the fan rotates, and the low-temperature air that has just been sucked in from the floor brushes, etc., flows along the surface of the heat radiator provided in the dust collection chamber on the upstream side. The air flowing along the heat radiator absorbs heat from the heat radiator and is transported through the ventilation chamber and is discharged from the main body through the exhaust port.
一方、電動送風機の電動機等から伝えられた熱や回路素
子自身で発生した熱が放熱体に伝達されており、この放
熱体は集塵室にセットされた集塵袋に接触している。こ
の結果、放熱体の熱が集塵袋に加わり、内部のゴミ類と
一緒に捕集されたダニが死滅する。On the other hand, heat transmitted from the motor of the electric blower and heat generated by the circuit elements themselves are transmitted to the heat radiator, and this heat radiator is in contact with the dust collection bag set in the dust collection chamber. As a result, the heat from the radiator is applied to the dust collection bag, killing the dust mites collected together with the dust inside.
［実 施 例］
第１図は本発明実施例の構成説明図、第２図は本体の背
面説明図、第３図は本体内部の原理的な構成説明図であ
る。[Embodiment] Fig. 1 is an explanatory view of the configuration of an embodiment of the present invention, Fig. 2 is an explanatory view of the rear side of the main body, and Fig. 3 is an explanatory view of the basic structure inside the main body.
第１図と第２図において、（１）は板床や絨穏床を示す
床面、（２）は床ブラシ、（３）は延長パイプ、（４）
は可撓性のチューブである。チューブ（４）の先端は手
元スイッチ（５）を設けた“くの字゛形の把持部（６）
が形成され、元の部分は差込部（７〉になっている。（
ｌＯ）は、床面（１）の上に置かれた電気掃除機の本体
である。（１１）は蓋、（１２）は差込部（７）が差し
込まれる吸入口、（１３〉は−大小の車輪、（１４）は
先端にプラグを取り付けたコードである。In Figures 1 and 2, (1) is a floor surface showing a board floor or a gentle floor, (2) is a floor brush, (3) is an extension pipe, (4)
is a flexible tube. The tip of the tube (4) is a dogleg-shaped grip (6) equipped with a hand switch (5).
is formed, and the original part becomes the insertion part (7>).
lO) is the main body of the vacuum cleaner placed on the floor (1). (11) is a lid, (12) is an inlet into which the insertion part (7) is inserted, (13> is a wheel of large and small sizes, and (14) is a cord with a plug attached to its tip.
また、（１５）は本体（ｌＯ）の背面に設けられた単一
の孔で構成する集中排気口、（１Ｂ）は複数の孔からな
る分散排気口である。Further, (15) is a centralized exhaust port consisting of a single hole provided on the back surface of the main body (lO), and (1B) is a distributed exhaust port consisting of a plurality of holes.
本体（ｌＯ）の内部の構成が、第３図に示されている。The internal structure of the main body (lO) is shown in FIG.
第３図の、（２０）は集塵室、（３０〉はコード室、（
４０）は送風室で、これらの各室は本体くｌＯ）の内部
に区画されている。集塵室（２０〉と送風室（４０）と
は連通され、その仕切り、及び送風室（４０）の排気口
（１６）の内側には、発泡性の合成樹脂等で作られた微
塵用のフィルタ（Ｆ）が設けられている。（２１）は蓋
（１１）を開けて取り替え可能に集塵室（２０）内に収
納された集塵袋、（３１）はコード室（３０）内に設け
られコード（１４）を巻き付けるリールである。（４１
）は送風室（４０）に取り付けられた電動送風機で、フ
ァン（４２）と電動機（４３）とからなる。また、（４
４）は放熱板である。放熱板（４４〉は集塵室（２０）
内に設けられていて、一方の面は集塵袋（２１）に接触
している。In Figure 3, (20) is the dust collection chamber, (30> is the cord chamber, (
40) is a ventilation chamber, and each of these chambers is divided inside the main body. The dust collection chamber (20> and the ventilation chamber (40) are in communication with each other, and inside the partition and the exhaust port (16) of the ventilation chamber (40), there is a dust collector made of foamable synthetic resin, etc. A filter (F) is provided. (21) is a dust collection bag stored in the dust collection chamber (20) that can be replaced by opening the lid (11), and (31) is a dust collection bag stored in the cord compartment (30). It is a reel on which the cord (14) is wound (41
) is an electric blower attached to the blower chamber (40), which consists of a fan (42) and an electric motor (43). Also, (4
4) is a heat sink. The heat sink (44) is the dust collection chamber (20)
One side is in contact with the dust collection bag (21).
（４５）は電動機（４３〉の回転を制御する電気回路部
、（４６）は電気回路部（４５）を構成するプリント基
板、（４７）はサイリスタのような回路素子である。プ
リント基板（４６）に取り付けられた回路素子（４７）
の−部は放熱板（４４）に接触或いは埋め込まれて熱的
に結合され、回路素子（４７）が放熱板（４４）を介し
て放熱されるようになっている。（４８〉は電源回路に
直列に接続された保護スイッチである。保護スイッチ（
４８〉は本体くｌＯ）の蓋（１１〉と連動し、Ｍ （１
１）を開けると電源が切れて、閉じると繋がるように動
作する。(45) is an electric circuit unit that controls the rotation of the electric motor (43), (46) is a printed circuit board that constitutes the electric circuit unit (45), and (47) is a circuit element such as a thyristor.Printed board (46) ) circuit element (47) attached to
The - portion is in contact with or embedded in the heat sink (44) and is thermally coupled, so that the circuit element (47) radiates heat through the heat sink (44). (48〉 is a protection switch connected in series to the power supply circuit.Protection switch (
48〉 is linked with the lid (11〉) of the main body
1) The power turns off when you open it, and it connects when you close it.
上述のような構成の本発明の電気掃除機の動作を、次に
説明する。The operation of the vacuum cleaner of the present invention configured as described above will be explained next.
コード（１４）のプラグをＡＣＩＱＯＶのコンセントに
差込んでから手元スイッチ（５〉を入れると、掃除機の
本体（１０〉内の電動機（４３〉が回転する。電動機（
４３）の回転で電動送風機（４１）が駆動されて、矢印
で示すように本体（ｌＯ）の内部で吸入口（１２）側か
ら吸込まれ集塵室〈２０〉と送風室（４０）を通って分
散排気口（１Ｂ）側に向かう空気流が形成される。When you insert the plug of the cord (14) into the ACIQOV outlet and turn on the hand switch (5>), the electric motor (43> inside the main body (10>) of the vacuum cleaner will rotate.
The electric blower (41) is driven by the rotation of 43), and as shown by the arrow, air is sucked inside the main body (lO) from the suction port (12) side and passes through the dust collection chamber <20> and the blower chamber (40). An air flow is formed toward the distributed exhaust port (1B).
ここで、床ブラシ（２）を床面０）に載せて前後に摺動
させると、床面（１）上のゴミや埃が床ブラシ（２）と
床面（１）との間に形成される隙間から吸込まれる。吸
込まれた塵埃は延長パイプ（３〉とチューブ（４）を介
して本体（ｌＯ）の集塵室（２０〉に収納されている集
塵袋（２１）内に集塵される。集塵後の排気は２か所の
フィルタ（Ｆ）で塵埃の微小成分が捕捉され、濾過後の
清浄な空気が分散排気口（１Ｂ）から本体くｉｏ〉の外
に吐き出される。Here, when the floor brush (2) is placed on the floor surface 0) and slid back and forth, dirt and dust on the floor surface (1) will be formed between the floor brush (2) and the floor surface (1). It is sucked in through the gap between the The sucked dust is collected into the dust collection bag (21) stored in the dust collection chamber (20>) of the main body (lO) through the extension pipe (3> and tube (4)).After dust collection In the exhaust air, minute components of dust are captured by two filters (F), and the filtered clean air is discharged to the outside of the main body from the dispersion exhaust port (1B).
掃除が進んで時間が経過すると、電動機（４８）の固定
子コイルや電源トランス等が時間の経過に連れて発熱す
る。これらの発生した熱や自身で生じた熱が電気回路部
（４５）の回路素子（４７）に留まると、電気的な特性
に悪影響を与えることになる。しかしながら、上記のよ
うに本体（１０）に生じる矢印で示された空気流の上流
側の低い温度の空気が、集塵室（２０）に流入して放熱
板（４４〉の面に沿って流れ去る。この結果、放熱板（
４４）の面に沿って流れた空気は放熱板（４４〉の熱を
奪って搬送しながら、送風室（４０）を通って排気口（
ｔ６〉から本体（１０）の外に排出される。As cleaning progresses and time elapses, the stator coil, power transformer, etc. of the electric motor (48) generate heat over time. If the generated heat or the heat generated by itself remains in the circuit element (47) of the electric circuit section (45), it will adversely affect the electrical characteristics. However, as mentioned above, the low temperature air on the upstream side of the air flow indicated by the arrow generated in the main body (10) flows into the dust collection chamber (20) and flows along the surface of the heat sink (44>). As a result, the heat sink (
The air flowing along the surface of the heat sink (44) absorbs heat from the heat sink (44) and is transported through the ventilation chamber (40) to the exhaust port (44).
t6> to the outside of the main body (10).
また、梅雨時などに絨穂床や畳床に発生したダニは、ゴ
ミ類に混ざって集塵室（２０）に収納された集塵袋（２
１）の中に捕集されている。一方、集塵室（２０）内の
放熱板（４４〉には上記のような発熱した電動機等の比
較的高い温度の熱が伝達されており、この放熱板〈４４
）は集塵袋（２１〉に接触している。このため、放熱板
（４４〉の熱がゴミ類に混ったダニに加わり、集塵袋（
２１）の中のダニを死滅させることができる。この他、
本体（ｌＯ）の蓋（１１）を開けると、保護スイッチ（
４８）が動作して電源回路が遮断される。故に、集塵袋
（２１）の交換等の操作で電気回路部（４５〉に接触し
たときでも、感電するようなことがなく安全にこれらの
操作を行うことができる。In addition, dust mites that appear on carpets and tatami floors during the rainy season are mixed with garbage and stored in the dust collection bag (20) stored in the dust collection room (20).
1). On the other hand, relatively high-temperature heat from the electric motor, etc. that generates heat as described above is transmitted to the heat sink (44) in the dust collection chamber (20).
) is in contact with the dust collection bag (21>. Therefore, the heat from the heat sink (44>) is applied to the dust mites mixed with the garbage, and the dust collection bag (21>) is in contact with the dust collection bag (21>.
21) can kill the mites inside. In addition,
When you open the lid (11) of the main unit (lO), the protection switch (
48) operates and the power supply circuit is cut off. Therefore, even if the user comes into contact with the electric circuit section (45>) during operations such as replacing the dust collection bag (21), these operations can be performed safely without getting an electric shock.
この実施例によれば、電気回路部（４５）の放熱が本体
（１０）の上流側で効果的に行なわれ、しかも特別な手
段を用いることなく放熱板（４４）でダニを撲滅するこ
とができる。According to this embodiment, heat dissipation from the electric circuit section (45) is effectively carried out on the upstream side of the main body (10), and moreover, it is possible to eradicate mites with the heat dissipation plate (44) without using special means. can.
なお、上述の実施例では掃除機の本体（ｌＯ）と床ブラ
シ（２〉とを延長パイプ（３〉とチューブ（４〉で接続
する構造の電気掃除機を図示して説明したが、ポット型
の電気掃除機にもこの発明を適用することができる。ま
た、第３図ではコード室（３０）と送風室（４０〉が水
平方向に隣り合せのものを図示したが、両室（３０）と
（４０）を上下関係に配置した場合にも本発明を適用す
ることができる。また、吸入口（１２）が本体（１０）
の上面の場合で説明したが、本体（１０）の前部の側面
に設けてもよい。In addition, in the above-mentioned embodiment, a vacuum cleaner having a structure in which the main body (lO) of the vacuum cleaner and the floor brush (2) are connected through an extension pipe (3) and a tube (4>) was illustrated and explained. The present invention can also be applied to vacuum cleaners such as The present invention can also be applied when the and (40) are arranged in a vertical relationship.Furthermore, the inlet (12) is connected to the main body (10).
Although the explanation has been made on the upper surface of the main body (10), it may be provided on the front side surface of the main body (10).
［発明の効果］
以上のように、この発明は電気回路部の回路素子を冷却
する放熱体を集塵室に配置すると共に、この放熱体を集
塵袋に接触させるような本体を備えた電気掃除機を構成
した。そして、一方では放熱体を本体に吸い込まれたば
かりの低い温度の空気流に晒すと共に、他方では放熱す
べき熱を集塵袋に加えるようにした。この結果、放熱の
ための集塵用の気流の利用が合理的で放熱効率がよく、
電気回路部の熱が効果的に放熱されて熱による誤動作等
を起こすようなことがない。また、ダニの撲滅には放熱
板の熱を利用しているので、ダニ用の接続口等の特別な
手段が不要で構成が簡単で、しかも製作費を安価に構成
できる。[Effects of the Invention] As described above, the present invention provides an electrical appliance that includes a heat dissipating body that cools circuit elements of an electric circuit section in a dust collection chamber, and a main body that brings this heat dissipation body into contact with a dust collection bag. Configured a vacuum cleaner. On the one hand, the heat radiator is exposed to the low-temperature airflow that has just been sucked into the main body, and on the other hand, the heat to be radiated is applied to the dust collection bag. As a result, the use of airflow for dust collection for heat dissipation is rational and has good heat dissipation efficiency.
The heat of the electric circuit section is effectively dissipated, and malfunctions due to heat do not occur. Furthermore, since the heat from the heat sink is used to eradicate mites, there is no need for special means such as connection ports for mites, and the structure is simple and the manufacturing cost can be reduced.
よって、本発明によれば、簡単な構成で冷却効果が優れ
、しかも製作費を安くできる等の幾つかの優れた特徴を
備えた電気掃除機を提供することができる。Therefore, according to the present invention, it is possible to provide a vacuum cleaner having several excellent features such as a simple configuration, excellent cooling effect, and low manufacturing cost.
第１図は本発明実施例の構成説明図、第２図は本体の背
面説明図、第３図は本体内部の原理的な構成説明図であ
る。
図面において、（１）は床面、（２）は床ブラシ、〈３
）は延長パイプ、（４）はチューブ、（５〉は手元スイ
ッチ、（６）は把持部、（７）は差込部、（１０）は掃
除機の本体、（１１）は蓋、（１２）は吸入口、（１３
）は車輪、（１４）はコード、（１５）は集中排気口、
（１Ｂ）は分散排気口、（２０）は集塵室、（２１〉は
集塵袋、（３ｏ）はコード室、（３１〉はリール、（４
ｏ〉は送風室、（４１〉は電動送風機、（４２）はファ
ン、（４３〉は電動機、（４４）は放熱板、（４５〉は
電気回路部、（４Ｂ〉はプリント基板、（４７〉は回路
素子、（４８）は保護スイッチ、（Ｐ）はフィルタであ
る。
なお、
図中同一符号は同一または相当部分を示すものとする。FIG. 1 is an explanatory view of the configuration of an embodiment of the present invention, FIG. 2 is an explanatory view of the rear side of the main body, and FIG. 3 is an explanatory view of the basic structure inside the main body. In the drawing, (1) is the floor surface, (2) is the floor brush, <3
) is the extension pipe, (4) is the tube, (5> is the hand switch, (6) is the grip part, (7) is the insertion part, (10) is the main body of the vacuum cleaner, (11) is the lid, (12) ) is the inlet, (13
) is the wheel, (14) is the cord, (15) is the central exhaust port,
(1B) is a distributed exhaust port, (20) is a dust collection chamber, (21> is a dust collection bag, (3o) is a cord chamber, (31> is a reel, (4
o> is the ventilation chamber, (41> is the electric blower, (42) is the fan, (43> is the electric motor, (44) is the heat sink, (45> is the electric circuit section, (4B> is the printed circuit board, (47>) is a circuit element, (48) is a protection switch, and (P) is a filter. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
塵袋が収容される集塵室と、該集塵室に連通し排気口を
設けて内部に電動送風機を配置した送風室とを備えた掃
除機の本体を具備する電気掃除機において、 前記電動送風機を制御する電気回路部の回路素子を冷却
する放熱体を前記集塵室に配置すると共に、この放熱体
を前記集塵袋に接触させて熱により内部のダニを死滅さ
せることを特徴とする電気掃除機。[Scope of Claims] A dust collection chamber provided with an inlet to which a cleaning hose is connected and in which a dust collection bag is accommodated when the lid is opened, and an exhaust port communicated with the dust collection chamber provided with an electric blower inside. In the vacuum cleaner, a vacuum cleaner body is provided with a main body of the vacuum cleaner, and a heat dissipating body for cooling circuit elements of an electric circuit section that controls the electric blower is disposed in the dust collection chamber, and the heat dissipation body A vacuum cleaner characterized in that the dust mites inside are killed by heat by bringing the body into contact with the dust collection bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1225307A JP2552922B2 (en) | 1989-08-31 | 1989-08-31 | Electric vacuum cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1225307A JP2552922B2 (en) | 1989-08-31 | 1989-08-31 | Electric vacuum cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0386132A true JPH0386132A (en) | 1991-04-11 |
| JP2552922B2 JP2552922B2 (en) | 1996-11-13 |
Family
ID=16827297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1225307A Expired - Lifetime JP2552922B2 (en) | 1989-08-31 | 1989-08-31 | Electric vacuum cleaner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2552922B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0456441U (en) * | 1990-09-18 | 1992-05-14 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5937059U (en) * | 1982-09-01 | 1984-03-08 | 松下電器産業株式会社 | vacuum cleaner |
| JPH01126937A (en) * | 1987-11-12 | 1989-05-19 | Hitachi Ltd | Electric clean |
-
1989
- 1989-08-31 JP JP1225307A patent/JP2552922B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5937059U (en) * | 1982-09-01 | 1984-03-08 | 松下電器産業株式会社 | vacuum cleaner |
| JPH01126937A (en) * | 1987-11-12 | 1989-05-19 | Hitachi Ltd | Electric clean |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0456441U (en) * | 1990-09-18 | 1992-05-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2552922B2 (en) | 1996-11-13 |
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