JP2001087184A - Vacuum cleaner of suction type or circulation type - Google Patents

Vacuum cleaner of suction type or circulation type

Info

Publication number
JP2001087184A
JP2001087184A JP27224399A JP27224399A JP2001087184A JP 2001087184 A JP2001087184 A JP 2001087184A JP 27224399 A JP27224399 A JP 27224399A JP 27224399 A JP27224399 A JP 27224399A JP 2001087184 A JP2001087184 A JP 2001087184A
Authority
JP
Japan
Prior art keywords
sub
nozzle
suction
type
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.)
Withdrawn
Application number
JP27224399A
Other languages
Japanese (ja)
Inventor
Hirohide Miwa
博秀 三輪
Hiroaki Miwa
博昭 三輪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MIWA SCIENCE KENKYUSHO KK
Original Assignee
MIWA SCIENCE KENKYUSHO KK
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 MIWA SCIENCE KENKYUSHO KK filed Critical MIWA SCIENCE KENKYUSHO KK
Priority to JP27224399A priority Critical patent/JP2001087184A/en
Publication of JP2001087184A publication Critical patent/JP2001087184A/en
Withdrawn legal-status Critical Current

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  • Nozzles For Electric Vacuum Cleaners (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce the traveling resistance of a hollow sub-nozzle for sucking and jetting air which is inserted to a carpet to be used. SOLUTION: A preceding combing means is provided at a position preceding a sub-nozzle in the traveling direction of a cleaning head. For example, a plurality of comb gears arranged radially are provided preceding the corresponding position of the sub-nozzle and rotated by a motor to previously comb pile to make the tip of the sub-nozzle enter a formed gap. Otherwise, comb teeth are formed with wires or thin plates as the preceding combining means and the teeth are oscillated to right/left, back/forth, etc., or moved in the state of a rack by a crank mechanism.

Description

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

【0001】[0001]

【発明の属する技術分野】電気掃除機の分野に属し、特
に絨毯の毛の深部にある砂ゴミ等を有効に掃除するb技
術に関わる。
BACKGROUND OF THE INVENTION The present invention belongs to the field of vacuum cleaners, and particularly relates to the technology b for effectively cleaning sand and dirt at the deep part of the hair of a carpet.

【0002】[0002]

【従来の技術】絨毯深部の砂ゴミ等を掃除するためにサ
ブノズルを使用する技術は従来各種開示されている。そ
のうちでサブノズルが絨毯の毛中に挿入されるものは比
較的少ないが毛中に挿入される例を示すと、サブノズル
を吸引に使用するのにはUSP3,611,473(J
ohnson)等が,噴気に使用されるのには室内空気
からはUSP4,594,749(Waterman)
等が、還流正圧からはUSP8,268,942(Ro
ssnan)等がある。しかしいずれも実用されていな
い。また本発明者は絨毯の毛に挿入されるサブノズルを
用いる方式を特開平9−299287に出願している。
2. Description of the Related Art Various techniques using a sub-nozzle for cleaning sand dust and the like in a deep part of a carpet have been disclosed. Among them, relatively few sub-nozzles are inserted into the hair of a carpet, but an example is shown in which the sub-nozzles are inserted into the hair. USP 3,611,473 (J
Ohnson) is used for fumes from indoor air according to USP 4,594,749 (Waterman).
From the positive reflux pressure USP 8,268,942 (Ro
ssnan). However, none of them has been put to practical use. The present inventor has filed an application in Japanese Patent Application Laid-Open No. 9-299287 using a sub-nozzle inserted into the hair of a carpet.

【0003】[0003]

【発明が解決しようとする課題】上記従来技術が実用さ
れていない最大原因の一つは、いずれも明記していない
が絨毯の毛に挿入されたときの走査(走行)抵抗が大きい
ことである。本発明者の出願中の特開平9−29928
7も同様の困難を抱えている。この絨毯の毛の中に挿入
されたサブノズルの走行抵抗を低減することが本発明が
解決しようとする課題である。
One of the biggest reasons why the above-mentioned prior art has not been put to practical use is that although not specified, the scanning (running) resistance when inserted into the hair of a carpet is large. . JP-A-9-29928 filed by the present inventors
7 have similar difficulties. It is an object of the present invention to reduce the running resistance of the sub-nozzle inserted into the hair of the carpet.

【0004】[0004]

【課題を解決するための手段】(手段1) 吸引式又は
還流式掃除機において、その掃除ヘッドが絨毯の毛中に
挿入可能な複数の中空サブノズル群を有し、そのサブノ
ズルを経由して吸入又は噴出気流を絨毯深部に導入しダ
ストを掃除すると共に、ヘッド走査方向でサブノズルに
先行する位置に先行梳毛手段を有することにより解決す
る。
[Means for Solving the Problems] (Means 1) In a suction type or reflux type vacuum cleaner, the cleaning head has a plurality of hollow sub-nozzle groups that can be inserted into the hair of a carpet, and suction is performed via the sub-nozzles. Alternatively, the problem can be solved by introducing a jet stream to the deep part of the carpet to clean dust and having a leading worsting means at a position preceding the sub-nozzle in the head scanning direction.

【0005】(手段2) 手段1の先行梳毛手段が、左
右(Y)方向に長い回転軸とその軸の少なくとも一つの
サブノズルに対応するY位置に複数の放射状に配列され
た櫛歯車及び/または毛の円盤を設けた回転体で、モー
ター、走行車輪、又は気流に駆動される風車等によって
回転駆動される機構とされることにより解決される。
(Means 2) The preceding combing means of the means 1 comprises a plurality of radially arranged comb gears and / or combs arranged at a Y position corresponding to a rotating shaft which is long in the left-right (Y) direction and at least one sub-nozzle of the shaft. The problem is solved by a rotating body provided with a hair disk, and a mechanism that is rotationally driven by a motor, running wheels, a windmill driven by airflow, or the like.

【0006】(手段3) 手段1の先行梳毛手段が、少
なくとも一つのサブノズルに対応するY位置に設けられ
たほぼ上下に長い線状または板状の櫛歯とされることで
解決される。
(Means 3) The problem is solved by that the preceding combing means of the means 1 is a long or vertically long linear or plate-like comb tooth provided at the Y position corresponding to at least one sub-nozzle.

【0007】(手段4) 手段3の先行梳毛手段が、櫛
歯群がほぼ上下に垂直に姿勢を拘束されながらその先端
が円運動に近い運動をするようにされた機構とされるこ
とで解決される。 (手段5) 手段3において、該櫛歯及び/又はサブノ
ズルが左右(Y),及び/又は前後(X)方向に加振さ
れることにより解決される。 (手段6) 手段5においてサブノズル以外に別の先行
梳毛手段を設けることなくサブノズル自体が先行梳毛手
段を兼ね、且つ加振されることにより解決される。
(Means 4) [0007] The solution is solved by the preceding combing means of the means 3 being a mechanism in which the tip of the comb teeth group makes a movement close to a circular movement while the posture of the comb teeth group is restricted substantially vertically. Is done. (Means 5) In the means 3, the problem is solved by vibrating the comb teeth and / or the sub-nozzles in left and right (Y) and / or front and rear (X) directions. (Means 6) The problem is solved by providing the sub-nozzle itself as the preceding worsting means and vibrating without providing any other preceding worsting means other than the sub-nozzles in the means 5.

【0008】[0008]

【実施例】図1に手段1の具体的構成法としての手段2
の実施例を示す。1−AはX−X断面を示す側面図、1
−BはZ−Z断面を示す平面図でいずれも要部のみを示
し他は省略されていて回転式先行梳毛手段1と、そのサ
ブノズル2との相対関係を示す。11は回転軸、12は
軸から放射状に例えば6枚とりつけられた櫛歯(以下櫛
歯車12という)である。矢印3は走行方向を示す。図
1−Bに示すように櫛歯車は各サブノズルの前に設けら
れているが、サブノズル間にも、あるいは回転軸上連続
的に設けられて良いことは勿論である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
The following shows an example. 1-A is a side view showing an XX section, 1
-B is a plan view showing a ZZ cross section, in which only the main part is shown and the others are omitted, and shows the relative relationship between the rotary type advance combing means 1 and its sub nozzle 2. Reference numeral 11 denotes a rotating shaft, and 12 denotes comb teeth (hereinafter referred to as "comb gears 12") radially attached from the shaft, for example. Arrow 3 indicates the traveling direction. Although the comb gear is provided in front of each sub-nozzle as shown in FIG. 1-B, it is needless to say that the comb gear may be provided between the sub-nozzles or continuously on the rotation axis.

【0009】回転式先行梳毛手段1の回転方向は前進方
向(fと図示)でも後進方向(rと図示)でも良い。回
転によりあらかじめ絨毯の毛の相互の絡みを解き、サブ
ノズルの前に毛の隙間を形成しサブノズルの先端の、ひ
いてはサブノズル本体のその隙間への進入を容易にし、
ヘッドの走行抵抗を下げる。
The direction of rotation of the rotary advance combing means 1 may be a forward direction (shown as f) or a reverse direction (shown as r). By rotating the hair of the carpet beforehand, the mutual entanglement of the hair is released, and a gap between the hairs is formed in front of the sub-nozzle to facilitate the entry of the tip of the sub-nozzle, and thus the sub-nozzle body, into the gap,
Reduce the running resistance of the head.

【0010】f方向回転の1と絨毯との摩擦はヘッドの
走行抵抗を減少しヘッドを浮上させる分力を発生する。
逆にr方向回転はヘッドの走行抵抗を増加し、ヘッドを
沈下させる分力を発生する。ヘッドは往復走行が一般で
あるのでサブノズルの前後に1を設け往復とも回転駆動
すれば走行抵抗については相互に相殺するが。浮上又は
沈下分力は加算されるのでヘッドの設計により何れか適
当な方を選択できる。ただし往復に際し一方のみを使用
して良いことは勿論である。
[0010] Friction between the carpet and one of the rotations in the f direction reduces the running resistance of the head and generates a component force that causes the head to fly.
Conversely, rotation in the r direction increases the running resistance of the head and generates a component force that causes the head to sink. Since the head generally travels back and forth, if 1 is provided before and after the sub-nozzle and the head is driven to rotate in both directions, the running resistances cancel each other out. Since the floating or sinking component is added, an appropriate one can be selected depending on the design of the head. However, it goes without saying that only one of them may be used for reciprocation.

【0011】図2は回転式先行梳毛手段1をヘッドに装
着した概念を示す断面図である。サブノズル2はその上
端を集合取り付函21にとりつけられ、函の上蓋はこの
例では室内空気に開放されている。勿論上蓋を残してフ
ァン後流の正圧に接続されて良いことは言うまでもな
い。1は図示されていないがこの函21にモーターと共
に取り付けられ回転される。ヘッドは前後双方に走行し
て掃除に使用されるので左右対称の構造とされる。左右
の回転式先行梳毛手段1は夫々図示の方向に互いに逆方
向に回転される。
FIG. 2 is a sectional view showing the concept in which the rotary type advance combing means 1 is mounted on the head. The upper end of the sub-nozzle 2 is attached to a collective mounting box 21, and the upper lid of the box is opened to room air in this example. Of course, it goes without saying that the upper cover may be left and connected to the positive pressure downstream of the fan. Although not shown, 1 is attached to this box 21 together with a motor and rotated. Since the head travels both forward and backward and is used for cleaning, the head has a symmetric structure. The left and right rotary preceding combing means 1 are respectively rotated in opposite directions in the directions shown in the figure.

【0012】上面カバー22はヘッドの横行吸引空間2
3を形成し、前縁24・後縁25からの吸引気流とサブ
ノズルからの吸引気流とを図示されない吸引管に導く。
函21はカバー22と上下に滑動可能にとりつけられ
る。これは絨毯の毛の長さに応じてサブノズル及び先行
梳毛手段がカバーに対し相対的に上下できるためであ
る。
The upper cover 22 is provided in the transverse suction space 2 of the head.
3 is formed, and the suction airflow from the leading edge 24 and the rear edge 25 and the suction airflow from the sub-nozzle are guided to a suction pipe (not shown).
The box 21 is slidably attached to the cover 22 up and down. This is because the sub-nozzle and the advance combing means can move up and down relative to the cover according to the length of the carpet hair.

【0013】図3は手段3,5の実施例を示す要部の斜
視図である。13は櫛歯で図では上下(Z)に長い前後
(X)に狭い左右(Y)に厚い短冊状の板である。2は
中空サブノズルで前後は船の船首のようにとがってい
る。櫛歯のY位置は各サブノズルのY位置に対応する。
31はこれら櫛歯を一括する支持体である。手段3では
この櫛歯構造はサブノズル群構造に固定され、通常の櫛
のようにサブノズルに先立って毛を梳る。
FIG. 3 is a perspective view of an essential part showing an embodiment of the means 3, 5. As shown in FIG. Numeral 13 denotes a comb-shaped plate which is long in the vertical direction (Z) and narrow in the front and rear (X) and narrow in the left and right (Y). Numeral 2 is a hollow sub-nozzle which is pointed forward and backward like the bow of a ship. The Y position of the comb teeth corresponds to the Y position of each sub nozzle.
Reference numeral 31 denotes a support body for integrating these comb teeth. In Means 3, the comb tooth structure is fixed to the sub-nozzle group structure, and the hair is combed prior to the sub-nozzle like a normal comb.

【0014】手段5では31は機械的なクランク機構
や、音響スピーカーのムービングコイルのような電磁力
を利用した駆動機構や、超音波駆動機構等で主としてY
方向に加振される。勿論X方向の加振を加えて良いが,
通常Y方向の加振はX方向の加振をも誘発する。特に板
13はY,X混合した加振となる。この振動は毛の絡み
を解きほぐす作用を持ち、あらかじめ梳ることによりサ
ブノズルの先端がこの解きほぐした隙間に入り、走行抵
抗を下げる。
In the means 5, 31 is a mechanical crank mechanism, a driving mechanism using an electromagnetic force such as a moving coil of an acoustic speaker, an ultrasonic driving mechanism, etc.
Excited in the direction. Of course, you can apply vibration in the X direction,
Normally, excitation in the Y direction also induces excitation in the X direction. In particular, the plate 13 is vibrated by mixing Y and X. This vibration has the effect of unraveling the entanglement of the hair, and the tip of the sub-nozzle enters the unraveled gap by combing in advance to reduce the running resistance.

【0015】図4は手段4の実施例である。4−Aは側
面図4−Bは正面図である。櫛歯集合47は複数の上下
に長い櫛歯が並列に左右(Y)方向に多数配置された図
示のごとき集合体である。各櫛歯のY位置はサブノズル
のY位置に対応している。47の左端には上下に長い垂
直の連結竿により同一半径のクランク円盤41,42の
同一回転角(同相)で同一半径位置にピン45、46で
連結される。41,42と一体の同一半径のタイミング
ベルト車43、44は相互にタイミングベルト48で契
合され,同一速度で同一方向に回転する。44は周辺に
歯車を有し歯車49と契合する
FIG. 4 shows an embodiment of the means 4. 4-A is a side view and 4-B is a front view. The comb tooth set 47 is an aggregate as shown in which a plurality of vertically long comb teeth are arranged in parallel in the left and right (Y) direction. The Y position of each comb tooth corresponds to the Y position of the sub nozzle. 47 is connected to the left end by pins 45 and 46 at the same radial position at the same rotation angle (the same phase) of the crank disks 41 and 42 having the same radius by a vertically long vertical connecting rod. Timing belt wheels 43, 44 integral with 41, 42 and having the same radius are mutually engaged by a timing belt 48, and rotate in the same direction at the same speed. 44 has a gear around and engages with a gear 49

【0016】同一の左右反転した構造体が図2−Bに示
すごとく47の右端にも設けられる。左右の歯車49は
同一の駆動回転軸50により図示の矢印の方向にモータ
等により回転される。
The same left-right inverted structure is also provided at the right end of 47 as shown in FIG. The left and right gears 49 are rotated by the same driving rotary shaft 50 in the direction of the arrow shown in the figure by a motor or the like.

【0017】この図から判明するように50の回転によ
り、47は姿勢を垂直下方に向けるようにピン45,4
6で拘束されつつその先端は絨毯の毛に挿入されてクラ
ンク円盤41,42の円周に近い円運動をする。その上
下ストロークを毛の長さの1〜2倍とすると絨毯の毛は
熊手で掻かれるごとく梳毛される。
As can be seen from the figure, by the rotation of 50, the pins 47 and 4 are turned so that the posture is directed vertically downward.
While being constrained by 6, the tip is inserted into the hair of the carpet and makes a circular motion close to the circumference of the crank disks 41,42. If the up-and-down stroke is 1-2 times the length of the hair, the hair of the carpet is combed as if scraped by a rake.

【0018】手段6のサブノズル自体に加振することは
サブノズル集合に手段5で説明した手段を利用して行え
ることは自明である。サブノズルのY方向幅が大きく別
の先行梳毛手段を設ける場合に比して走行抵抗は大き
く、且つサブノズル集合体の質量が大きいので加振に
は、より大きなエネルギーが必要となる欠点がある。
It is obvious that the vibration of the sub-nozzle itself of the means 6 can be performed by using the means described in the means 5 for the sub-nozzle assembly. The sub-nozzle has a large width in the Y direction and therefore has a disadvantage in that the running resistance is large and the mass of the sub-nozzle assembly is large as compared with the case where another preceding combing means is provided.

【0019】[0019]

【発明の効果】本発明によれば先行梳毛手段によりサブ
ノズルを利用してもその走行抵抗を減少できるので絨毯
深部に有効なサブノズルの効果を利用することが実用的
に可能になる。
According to the present invention, the running resistance can be reduced even if the sub-nozzle is used by the advance worsting means, so that the effect of the sub-nozzle effective in the deep part of the carpet can be practically used.

【図面の簡単な説明】[Brief description of the drawings]

【図1】回転式先行梳毛手段の要部を示す概念図。 1−Aは側面X−X断面図 1−Bは平面Z−Z断面図FIG. 1 is a conceptual diagram showing a main part of a rotary type advance worsting means. 1-A is a side view XX cross section 1-B is a plane ZZ cross section

【図2】回転式先行梳毛手段をヘッドに装着した概念
図。
FIG. 2 is a conceptual diagram in which a rotary type advance worsting means is mounted on a head.

【図3】櫛歯式先行梳毛手段の要部を示す概念図。FIG. 3 is a conceptual diagram showing a main part of a comb-teeth type advance combing means.

【図4】熊手式先行梳毛手段の要部を示す概念図。 4−Aは側面図 4=Bは正面図FIG. 4 is a conceptual diagram showing a main part of a rake type advance worsting means. 4-A is a side view 4 = B is a front view

【符号の説明】[Explanation of symbols]

1 回転式先行梳毛手段,11回転軸 12櫛歯車 2 サブノズル 21サブノズル集合取り付函 22ヘッド上面カバー 23横行吸引空間 24カバー前縁 25カバー後縁 3 走行方向矢印 13 板状先行梳毛櫛歯、 31櫛歯一括支持体 41 クランク円盤 42 クランク円盤兼歯車 43,44 タイミングベルト車 45,46 ピン 47 櫛歯集合体 48 タイミングベルト 49 歯車 50 回転駆動軸 DESCRIPTION OF REFERENCE NUMERALS 1 rotary advance worsting means, 11 rotation shaft 12 comb gear 2 sub nozzle 21 sub nozzle collective mounting box 22 head top cover 23 transverse suction space 24 cover front edge 25 cover rear edge 3 running direction arrow 13 plate-shaped advance worsted comb teeth, 31 Comb tooth support 41 Crank disk 42 Crank disk and gear 43, 44 Timing belt wheel 45, 46 Pin 47 Comb assembly 48 Timing belt 49 Gear 50 Rotation drive shaft

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 吸引式又は還流式掃除機において、その
掃除ヘッドが絨毯の毛中に挿入可能な複数の中空サブノ
ズル群を有し、そのサブノズルを経由して吸入又は噴出
気流を絨毯深部に導入しダストを掃除すると共に、ヘッ
ド走査方向でサブノズルに先行する位置に先行梳毛手段
を有することを特徴とする吸引式又は還流式掃除機。
1. A suction or recirculation type vacuum cleaner, wherein a cleaning head has a plurality of hollow sub-nozzle groups that can be inserted into hair of a carpet, and a suction or a blast air flow is introduced into a deep part of the carpet via the sub-nozzles. A suction-type or recirculation-type vacuum cleaner characterized by having a preceding worsting means at a position preceding a sub-nozzle in a head scanning direction while cleaning dust.
【請求項2】 請求項1の先行梳毛手段が、左右(Y)
方向に長い回転軸とその軸上に少なくとも一つのサブノ
ズルに対応するY位置に複数の放射状に配列された櫛歯
の車及び/または毛の円盤を設けた回転体で、モータ
ー、走行車輪、又は気流に駆動される風車等によって回
転駆動される機構であることを特徴とする吸引式又は還
流式掃除機。
2. The worsting means according to claim 1, wherein said worsting means is left and right (Y).
A rotating body provided with a rotating shaft that is long in the direction and a plurality of radially arranged comb-shaped wheels and / or bristle disks arranged at Y positions corresponding to at least one sub-nozzle on the shaft, a motor, a traveling wheel, or A suction-type or reflux-type vacuum cleaner, which is a mechanism that is driven to rotate by a windmill or the like driven by an airflow.
【請求項3】 請求項1の先行梳毛手段が、少なくとも
一つのサブノズルに対応するY位置に設けられたほぼ上
下に長い線状または板状の櫛歯であることを特徴とする
吸引式又は還流式掃除機。
3. The suction or reflux method according to claim 1, wherein the advance combing means is a long or vertically long linear or plate-like comb tooth provided at a Y position corresponding to at least one sub-nozzle. Vacuum cleaner.
【請求項4】 請求項3の先行梳毛手段が、櫛歯群がほ
ぼ上下に垂直に姿勢を拘束されながらその先端が円運動
に近い運動をするようにされた機構とされることことを
特徴とする吸引式又は還流式掃除機。
4. The combing means according to claim 3, wherein the comb teeth are made to move almost in a circular motion while the comb teeth are restrained in a substantially vertical position. Suction type or reflux type vacuum cleaner.
【請求項5】 請求項3において、該櫛歯及び/又はサ
ブノズルが左右(Y),及び/又は前後(X)方向に加
振されることを特徴とする吸引式又は還流式掃除機。
5. The suction-type or recirculation-type vacuum cleaner according to claim 3, wherein the comb teeth and / or the sub-nozzles are vibrated in left and right (Y) and / or front and rear (X) directions.
【請求項6】 請求項5においてサブノズル以外に別の
先行梳毛手段を設けることなくサブノズル自体が先行梳
毛手段を兼ね、且つ加振されることを特徴とする吸引式
又は還流式掃除機。
6. A suction-type or recirculation-type vacuum cleaner according to claim 5, wherein the sub-nozzle itself also serves as the preceding combing means and is vibrated without providing another preceding combing means other than the sub-nozzle.
JP27224399A 1999-09-27 1999-09-27 Vacuum cleaner of suction type or circulation type Withdrawn JP2001087184A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27224399A JP2001087184A (en) 1999-09-27 1999-09-27 Vacuum cleaner of suction type or circulation type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27224399A JP2001087184A (en) 1999-09-27 1999-09-27 Vacuum cleaner of suction type or circulation type

Publications (1)

Publication Number Publication Date
JP2001087184A true JP2001087184A (en) 2001-04-03

Family

ID=17511137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27224399A Withdrawn JP2001087184A (en) 1999-09-27 1999-09-27 Vacuum cleaner of suction type or circulation type

Country Status (1)

Country Link
JP (1) JP2001087184A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110779261A (en) * 2019-10-28 2020-02-11 北京大学 Circulating carbon dioxide spray quick-freezing system and freezing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110779261A (en) * 2019-10-28 2020-02-11 北京大学 Circulating carbon dioxide spray quick-freezing system and freezing method thereof

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A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20061205