JPS6123000B2 - - Google Patents
Info
- Publication number
- JPS6123000B2 JPS6123000B2 JP12112779A JP12112779A JPS6123000B2 JP S6123000 B2 JPS6123000 B2 JP S6123000B2 JP 12112779 A JP12112779 A JP 12112779A JP 12112779 A JP12112779 A JP 12112779A JP S6123000 B2 JPS6123000 B2 JP S6123000B2
- Authority
- JP
- Japan
- Prior art keywords
- washing
- water level
- tank
- electrode
- transformer
- 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.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 238000005406 washing Methods 0.000 claims description 40
- 238000001514 detection method Methods 0.000 claims description 19
- 230000018044 dehydration Effects 0.000 claims description 12
- 238000006297 dehydration reaction Methods 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 description 15
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
【発明の詳細な説明】
本発明は少なくとも上端側を除く周壁を無孔壁
とした洗濯兼脱水槽を有する洗濯機の水位検知装
置に関し、その目的は、圧力スイツチおよびエア
ートラツプ装置を用いないで正確な水位検知を行
うにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water level detecting device for a washing machine having a washing and dehydrating tub in which the circumferential wall except at least the upper end side is a non-porous wall, and an object of the present invention is to detect water level accurately without using a pressure switch or an air trap device. The purpose is to perform water level detection.
自動洗濯機では、脱水用の小穴を側面に穿設し
た洗濯兼脱水槽の外側に外槽を設けて、洗濯、す
すぎ時には前記外槽内部に水をためるものが一般
的である。そして、水位の検知は、外槽下部側壁
に設けたエアトラツプの空気圧力の変化によつて
圧力スイツチを動作させて行つていた。しかし、
上記構造では、外側と洗濯兼脱水槽との間に水が
溜まるため、多量の洗濯水を必要とするという欠
点があつた。 In automatic washing machines, an outer tank is generally provided on the outside of a washing and dehydrating tank with small holes for dewatering on the side, and water is stored inside the outer tank during washing and rinsing. The water level was detected by operating a pressure switch based on changes in air pressure in an air trap installed on the lower side wall of the outer tank. but,
The above structure has the disadvantage that a large amount of washing water is required because water accumulates between the outside and the washing/drying tub.
また、脱水用の小穴を穿設しない洗濯兼脱水槽
のみに水を溜めて洗濯することが考えられるが、
この場合の水位検知方法としては、従来の圧力ス
イツチにより水位検知を行なう場合には、回転軸
部にエアートラツプを設ける必要があるために水
路が複雑となり、さらに排水弁や圧力スイツチが
必要であつて、高価となるものであつた。 Also, it is conceivable to wash water by storing water only in a washing/dehydration tank without holes for dehydration.
In this case, the water level detection method using a conventional pressure switch requires an air trap on the rotating shaft, which complicates the waterway, and also requires a drain valve and pressure switch. , which was expensive.
上記した構造を改良するものとして、洗濯兼脱
水槽に水位に応じて上下動する磁石を有した浮子
と、前記浮子により開閉されるリードスイツチを
配設して、リードスイツチを洗濯兼脱水槽と軸受
部との間に設けた摺動接触子を介して制御回路に
接続するといつた方法があるが、摺動部の摩耗等
による耐久性、および防水構造が実用上大きな問
題となつていた。 As an improvement to the above-described structure, a float having a magnet that moves up and down according to the water level is installed in the washing and dehydrating tank, and a reed switch that is opened and closed by the float, so that the reed switch can be used as a washing and dehydrating tank. There is a method of connecting to a control circuit via a sliding contact provided between the bearing part, but durability due to wear of the sliding part and waterproof structure have become major problems in practical use.
本発明は上記従来の欠点に鑑み成されたもの
で、以下、その一実施例を図面を参照して説明す
る。第1図において、1は外粋、2は少なくとも
上端側を除く周壁を無孔壁とした洗濯兼脱水槽、
3は洗濯兼脱水槽2を外包した外槽、4は洗濯兼
脱水槽2の底部中央に配されたパルセータ、4a
はパルセータを装着した洗濯軸を内包し、洗濯兼
脱水槽2を装着した脱水軸からなる洗濯脱水軸、
5はブレーキ・クラツチ機構、6はモータ、7は
モータプーリ、8はベルト、9はインペラ・プー
リ、10は外粋1の上部四隅から垂下してなる防
振支持装置、11は可動部を有する回転トランス
であり、11aはトランス11の一次巻線、11
bはトランス11の二次巻線であつて、一次巻線
11aは洗濯兼脱水槽2の底部に固定され、ま
た、二次巻線11bは外槽3に固定され、回転ト
ランス11は、洗濯脱水軸4aの外周部に設けら
れている。 The present invention has been made in view of the above-mentioned conventional drawbacks, and one embodiment thereof will be described below with reference to the drawings. In Fig. 1, 1 is an outer wall, 2 is a washing/dehydration tank with a non-porous peripheral wall except for at least the upper end side;
3 is an outer tank enclosing the washing and dehydrating tank 2; 4 is a pulsator placed at the center of the bottom of the washing and dehydrating tank 2; 4a;
is a washing and dehydrating shaft that includes a washing shaft equipped with a pulsator and a dehydrating shaft equipped with a washing and dehydrating tank 2;
5 is a brake/clutch mechanism, 6 is a motor, 7 is a motor pulley, 8 is a belt, 9 is an impeller/pulley, 10 is a vibration isolation support device hanging from the upper four corners of the outer body 1, and 11 is a rotating device having a movable part. 11a is the primary winding of the transformer 11;
b is a secondary winding of the transformer 11, the primary winding 11a is fixed to the bottom of the washing and dehydrating tub 2, the secondary winding 11b is fixed to the outer tub 3, and the rotary transformer 11 is It is provided on the outer periphery of the dehydration shaft 4a.
12,13は洗濯兼脱水槽2の周壁縦方向に設
けた排水溝2aの底部一部に設けた水位検出用の
電極で、12は水位リセツト検出用電極であり、
13aおよび13bは水位セツト検出用電極であ
つて、電極13aは高水位検出用、電磁13bは
低水位検出用である。 Reference numerals 12 and 13 are electrodes for water level detection provided at a part of the bottom of the drain groove 2a provided in the vertical direction of the peripheral wall of the washing/dehydration tank 2; 12 is an electrode for water level reset detection;
Reference numerals 13a and 13b are electrodes for detecting a water level set; the electrode 13a is for detecting a high water level, and the electromagnetic electrode 13b is for detecting a low water level.
第2図は、水位検知回路の基本構成をブロツク
図にて示したもので、14は交流電源、15はリ
レー16を開閉制御する負荷制御部で、リレー1
6の接点16aにより洗濯機のモータ6、給水弁
およびタイマモータ(図示せず)等の負荷を制御
する。17は水位切替スイツチ18a,18bに
より水位を設定する水位設定部、19は直流電源
部20から任意の発振周波数、例えば1MHzを得
ている発振回路部、11は可動部を有する回転ト
ランスであり、11a及び11bは前述した通り
のトランス11の一次及び二次巻線、21は洗濯
兼脱水槽2の内周壁に設けた水位検知用の電極1
2,13よりなるセンサー22の電気抵抗が所定
値に達したことを検出する検出部を示している。 Fig. 2 is a block diagram showing the basic configuration of the water level detection circuit, where 14 is an AC power supply, 15 is a load control unit that controls the opening and closing of the relay 16, and the relay 1
6 controls loads such as the motor 6, water supply valve, and timer motor (not shown) of the washing machine. 17 is a water level setting unit that sets the water level using water level changeover switches 18a and 18b; 19 is an oscillation circuit unit that obtains an arbitrary oscillation frequency, for example, 1 MHz from the DC power supply unit 20; 11 is a rotary transformer having a movable part; 11a and 11b are the primary and secondary windings of the transformer 11 as described above, and 21 is the electrode 1 for water level detection provided on the inner peripheral wall of the washing and dehydrating tank 2.
2 shows a detection unit that detects that the electrical resistance of the sensor 22 consisting of sensors 2 and 13 has reached a predetermined value.
第3図、第4図は、電極13aの取付け状態を
示し、洗濯兼脱水槽2の側壁に設けた排水溝2a
の底部に凹部2bを設け、この凹部2bに電極1
3aがその表面が凹部2bから突出しないように
埋設してある。そして電極13b、電極12につ
いても同様な取付け状態にある。23a,23b
は、電極12,13を固定した状態での水漏れを
防止するシール部材、24は電極固定用のナツト
を示す。 FIGS. 3 and 4 show how the electrode 13a is attached, and the drain groove 2a provided on the side wall of the washing and dehydrating tank 2.
A recess 2b is provided at the bottom of the electrode 1.
3a is buried so that its surface does not protrude from the recess 2b. The electrodes 13b and 12 are also attached in a similar manner. 23a, 23b
2 shows a sealing member for preventing water leakage when the electrodes 12 and 13 are fixed, and 24 shows a nut for fixing the electrodes.
今、洗濯機に通電させると、給水工程では給水
弁が動作して、洗濯兼脱水槽2内へ給水される。
この時、水位検知装置へも通電される。給水の初
期段階には、水位検知用の電極12,13a,1
3bに水が接触しておらない。検出部21の一端
は、パルセータ4、又は脱水軸の導電部にとりつ
けられているが、電極との間の抵抗値は無限に近
い。 Now, when the washing machine is energized, the water supply valve operates in the water supply process, and water is supplied into the washing and dehydration tank 2.
At this time, the water level detection device is also energized. At the initial stage of water supply, electrodes 12, 13a, 1 for water level detection are installed.
3b is not in contact with water. One end of the detection part 21 is attached to the pulsator 4 or the conductive part of the dehydration shaft, and the resistance value between it and the electrode is nearly infinite.
したがつて、この状態では、発振回路部19は
設定された発振周波数で発振し、負荷制御部15
は動作していないから、リレー16は動作せず、
リレー16の接点16aはN.C側に閉じている。 Therefore, in this state, the oscillation circuit section 19 oscillates at the set oscillation frequency, and the load control section 15
is not operating, so relay 16 is not operating,
Contact 16a of relay 16 is closed to the NC side.
給水が続行され、水位リセツト検出用電極12
の水位まで給水されると、発振回路部19は設定
された発振周波数を維持することができず、発振
周波数が変化するか、発振電圧がわずかに低下す
る。しかし、この時にも、負荷制御部15は動作
しない。したがつて、リレー16はやはり動作せ
ず、リレーの接点16aはN.C側に閉じている。 Water supply continues, and the water level reset detection electrode 12
When water is supplied to the water level, the oscillation circuit section 19 cannot maintain the set oscillation frequency, and the oscillation frequency changes or the oscillation voltage slightly decreases. However, even at this time, the load control section 15 does not operate. Therefore, the relay 16 does not operate, and the relay contact 16a is closed to the NC side.
さらに給水が続行され、低水位設定用の水切替
スイツチ18bが閉じている場合には、水位が電
極13bに達した時、また、高水位設定用の水位
切替スイツチ18aが閉じている場合には、水位
が電極13aに達した時に、発振回路19は設定
された発振周波数を維持することができず、発振
が停止するか、または発振電圧が基準値以下に低
下するため、負荷制御部15が動作し、リレー1
6が動作してリレー接点16aはN.O側に切替つ
て、モータ6が運転を始め、パルセータ4が回転
して、洗濯、もしくは、すすぎが開始される。こ
の時、水面変動により、水位セツト検出用の電極
13a、または13bから水位が低下した場合に
も発振回路部19は前記の状態を維持するような
構成にしてある。水面がリセツト用の電極12以
下に下がれば、発振回路部19は設定された発振
周波数で再び発振し、負荷制御部15は不動作と
なり、リレー16は開放され、リレー接点16a
は再びN.C側に閉じる。 Furthermore, when water supply continues and the water level selector switch 18b for setting a low water level is closed, when the water level reaches the electrode 13b, and when the water level selector switch 18a for setting a high water level is closed, When the water level reaches the electrode 13a, the oscillation circuit 19 is unable to maintain the set oscillation frequency and oscillation stops or the oscillation voltage drops below the reference value. works, relay 1
6 is activated, the relay contact 16a is switched to the NO side, the motor 6 starts operating, the pulsator 4 rotates, and washing or rinsing is started. At this time, even if the water level drops from the water level set detection electrode 13a or 13b due to water level fluctuations, the oscillation circuit section 19 is configured to maintain the above state. When the water level falls below the reset electrode 12, the oscillation circuit section 19 oscillates again at the set oscillation frequency, the load control section 15 becomes inoperable, the relay 16 is opened, and the relay contact 16a
closes to the NC side again.
以上のように本発明によれば、少なくとも上端
側を除く周壁を無孔壁とした洗濯兼水槽を設け、
この洗濯兼脱水槽の側壁に設けた電極間の抵抗変
化を、回転トランスによる電磁結合を介して制御
回路にて検知するものであつて、摺動部がなく、
耐久性の点で何ら問題がなく信頼性が高く、ま
た、洗濯兼脱水槽内の電極は、電気的には完全な
分離構成で回転部側にて電気を発生させているた
め、感電などの心配がなく安全性が非常に高い。
しかも、回転トランスを洗濯脱水軸の外周部に設
けることにより、洗濯兼脱水槽の回転時の面ブレ
による影響を最小限に抑えることができるため、
回転トランスの1次、2次巻線間の空隙を狭くで
きる。また、洗濯脱水軸には通常磁性材料が使用
されているため、回転トランスの電磁結合が良く
なるため、検出精度が向上する。さらに、水位検
出用の電極を、洗濯兼脱水槽側壁の凹部に、電極
表面が凹部から突出しないように埋設すれば、脱
水後の水分を含んだ衣類が直接電極に接触しない
ため、検知感度がよくなり誤動作が生じない。 As described above, according to the present invention, a washing/water tank is provided in which the peripheral wall except at least the upper end side is a non-porous wall,
Changes in resistance between electrodes installed on the side wall of this washing and dehydrating tank are detected by a control circuit through electromagnetic coupling using a rotating transformer, and there are no sliding parts.
It is highly reliable with no problems in terms of durability, and the electrodes in the washing and dehydrating tank are electrically completely separated and generate electricity on the rotating part side, so there is no risk of electric shock, etc. There is no need to worry and it is very safe.
Furthermore, by providing the rotating transformer on the outer periphery of the washing/dehydrating shaft, the effects of surface wobbling when the washing/dehydrating tub rotates can be minimized.
The gap between the primary and secondary windings of a rotating transformer can be narrowed. Furthermore, since a magnetic material is usually used for the washing and dehydrating shaft, the electromagnetic coupling of the rotary transformer is improved, which improves detection accuracy. Furthermore, if the electrode for water level detection is buried in the recess in the side wall of the washing and dehydrating tank so that the electrode surface does not protrude from the recess, the detection sensitivity will be increased because the water-containing clothes after dehydration will not come into direct contact with the electrode. It works fine and no malfunctions occur.
第1図は本発明の一実施例における洗濯機の縦
断面図、第2図はその水位検出装置の基本構成を
示すブロツク図、第3図は水位検出用電極の取付
け状態を示す要部斜視図、第4図は同水平断面図
である。
2……洗濯兼脱水槽、3……外槽、11……回
転トランス、11a,11b……一次、二次巻
線、12,13a,13b……電極。
Fig. 1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention, Fig. 2 is a block diagram showing the basic configuration of the water level detection device, and Fig. 3 is a perspective view of main parts showing the mounting state of the water level detection electrode. FIG. 4 is a horizontal sectional view of the same. 2... Washing and dehydration tank, 3... Outer tank, 11... Rotating transformer, 11a, 11b... Primary and secondary windings, 12, 13a, 13b... Electrodes.
Claims (1)
洗濯兼脱水槽を外槽内に設け、この洗濯兼水槽の
内周壁に水位検出用の電極を設け、前記洗濯兼脱
水槽と一体に回転するトランスの二次巻線に前記
電極を接続し、前記二次巻線と電磁結合される前
記トランスの一次巻線を外槽側に設け、この一次
巻線を水位制御用の回路に接続し、前記トランス
を前記洗濯兼脱水槽底部の洗濯脱水軸の外周部に
設けてなる洗濯機の水位検知装置。1. A washing/dehydration tank having a non-porous peripheral wall except for at least the upper end is provided in the outer tank, an electrode for water level detection is provided on the inner peripheral wall of the washing/drying tank, and the washing/dehydration tank rotates integrally with the washing/dehydration tank. Connecting the electrode to a secondary winding of a transformer, providing a primary winding of the transformer that is electromagnetically coupled to the secondary winding on the outer tank side, and connecting this primary winding to a water level control circuit; A water level detection device for a washing machine, wherein the transformer is provided on the outer periphery of a washing and dehydrating shaft at the bottom of the washing and dehydrating tub.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12112779A JPS5643997A (en) | 1979-09-19 | 1979-09-19 | Detector for water level of washing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12112779A JPS5643997A (en) | 1979-09-19 | 1979-09-19 | Detector for water level of washing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5643997A JPS5643997A (en) | 1981-04-22 |
JPS6123000B2 true JPS6123000B2 (en) | 1986-06-03 |
Family
ID=14803541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12112779A Granted JPS5643997A (en) | 1979-09-19 | 1979-09-19 | Detector for water level of washing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5643997A (en) |
-
1979
- 1979-09-19 JP JP12112779A patent/JPS5643997A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5643997A (en) | 1981-04-22 |
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