WASHING/DRYING MACHINE

Description

[0001] This invention relates to a washing /drying machine which protects the user from high current formed as a result of the static electricity during the operation and minimizes the electromagnetic radiation.

[0002] The washing machines are grounded to prevent the damage for the user, see e.g. JP-H-09131494 A.

[0003] In the prior art, it is grounded over the electric motor. The static electricity on the drum and the tub is transferred to the motor and to the body by means of a belt comprising a conductive material and grounding line respectively. The connection of the electric motor to the grounding line causes high level of noise. In order to avoid the noise on the phase and neutral lines due to the high level of noise on the grounding line, a filter comprising an inductance is used at the electricity connection inlet of the washing machine. Electromagnetic radiation can not be lowered to an acceptable level in accordance with the standards without the use of inductances, see e.g. JP-2000-70589 A. These types of filters are large and costly.

[0004] The object of this invention is to provide a washing /drying machine which protects the user from high current formed as a result of the static electricity during the operation and minimizes the electromagnetic radiation.

[0005] The washing/drying machine realized in order to attain above mentioned objects of the present invention has been illustrated in the attached drawings, wherein;

Figure 1 is the perspective view of a washing/drying machine,

Figure 2 is the schematic view of a washing/drying machine comprising a metal tub,

Figure 3 is a schematic view of a washing/drying machine comprising a plastic tub.

Figure 4 is a schematic view of a RF (radio frequency) filter. The components shown in the figures have been enumerated as below;

1. Washing/drying machine

2. Body

3. Tub

4. Drum

5. Motor

6. Belt

7. Drum shaft

8. Support

9. RF filter

10. Grounding connection

[0006] The washing/drying machine (1) which is the subject of this invention comprises a body (2), a tub (3) preferably from plastic material in which the washing cycle is performed, a drum (4) in the tub (3) rotating around its own axis to which the laundry is loaded, a motor (5) preferably with serial character and brushes which rotates the drum (4), a belt (6) which transfers the movement of the motor (5) to the drum (4) and is produced from non-conductive material to prevent the transfer the static electricity on the motor (5) to the body (2), one or more support (8) preferably from plastic material which is mounted on the feet of the motor (5) and used to prevent the transfer of the static electricity on the motor (5) to the body (2), a drum shaft (7) around which the drum (4) rotates, an RF filter (9) which reduces the electromagnetic radiation at the supply electricity inlet and a grounding connection (10) providing the discharge of the static electricity on the drum (4).

[0007] RF filter (9) is a capacitive filter consists of asymmetric capacitors placed between phase (P) and neutral (N) lines and symmetric capacitors placed between phase (P) or neutral (N) and grounding line (PE).

[0008] The grounding line (PE) from the supply is connected to the body (2). Motor (5) is in an isolated position by means of the belt (6) and the support (8). The static electricity on the motor (5) is not transferred to the body (2). Therefore the noise on the grounding line (PE) is reduced and a simple structured RF filter (9) is used to minimize the electromagnetic radiation.

[0009] As the tub (3) is made of plastic material, the static electricity on the drum (4) is discharged to the body by means of the grounding connection (10) with the drum shaft (7).

[0010] In another embodiment of the invention, the tub (3) is produced from metalic material. In this embodiment the static electricity on the drum (4) which is transferred to the tub (3) is transferred to the body (2) by means of the grounding connection with any point on the tub (3).

[0011] In the washing/drying machine which is the subject of this invention, static electricity on the motor (5) is not transferred to the body (2) by means of the non-conductive belt (6) and plastic supports (8) and the electromagnetic radiation is reduced by the use of only one capacitive RF filter (9). This enables reduced manufacturing costs.

Claims

1. A washing drying machine (1) comprising a body (2), a tub (3) in which the washing cycle is performed, a drum (4) in the tub (3) rotating around its own axis to which the laundry is loaded, a motor (5) which rotates the drum (4), a belt (6) which transfers the movement of the motor (5) to the drum (4), a drum shaft (7) around which the drum (4) rotates, and a grounding connection (10) with the body (2) providing the discharge of the static electricity on the drum (4), characterized by a belt (6) which is produced from non-conductive material to prevent the transfer of the static electricity on the motor (5) to the body (2) and reduces the noise on the grounding line (PE) as the motor (5) is in an isolated position, one or more plastic support (8) which is mounted on the feet of the motor (5) and a capacitive RF filter (9) which minimizes the electromagnetic radiation at the supply electricity inlet.

2. A washing/drying machine (1) as in Claim 1 characterized with the capacitive RF filter (9) consisting of asymmetric capacitors placed between phase (P) and neutral (N) lines and symmetric capacitors placed between phase (P) or neutral (N) and grounding line (PE).

3. A washing drying machine (1) as in Claim 1 characterized with the grounding connection (10) with the drum shaft (7) in that it is used to discharge the static electricity on the drum (4) to the body (2) and the tub (3) is made of plastic material.

4. A washing drying machine (1) as in Claim 1 characterized with the grounding connection (10) with any point on the tub (3) in that it is used for transferring the static electricity which is formed on the drum (4) and transfered to the tub (3) and the tub (3) is made of metalic material.

Ansprüche

1. Wasch-/Trockenmaschine (1), umfassend einen Gehäusekörper (2), einen Wasch-/Trockenbehälter (3), in dem der Waschzyklus durchgeführt wird, eine Trommel (4) in dem Wasch-/Trockenbehälter (3), die sich um ihre eigene Achse dreht und in die die Wäsche geladen wird, einen Motor (5), der die Trommel (4) dreht, einen Riemen (6), der die Bewegung des Motors (5) auf die Trommel (4) überträgt, eine Trommelwelle (7), um die sich die Trommel (4) dreht, und eine Erdungsverbindung (10) mit dem Gehäusekörper (2), die das Entladen statischer Energie an der Trommel (4) ermöglicht, gekennzeichnet durch einen Riemen (6), der aus nicht leitfähigem Material hergestellt ist, um die Übertragung der statischen Elektrizität am Motor (5) auf den Gehäusekörper (2) zu verhindern, und der Rauschen an dem Erdungsleiter (PE) reduziert, wenn der Motor (5) in einer isolierten Position ist, eine oder mehrere Kunststoffträger (8), die an den Füßen des Motors (5) angebracht sind, und ein kapazitives RF-Filter (9), das die elektromagnetische Strahlung am Elektrizitätsversorgungseingang minimiert.

2. Wasch-/Trockenmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass das kapazitive RF-Filter (9) aus asymmetrischen Kondensatoren, die zwischen Phasen- (P) und Neutralleiter (N) angeordnet sind, und symmetrischen Kondensatoren besteht, die zwischen Phase- (P) oder Neutral-(N) und Erdungsleiter (PE) angeordnet sind.

3. Wasch-/Trockenmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Erdungsverbindung (10) mit der Trommelwelle (7) verwendet wird, um die statische Elektrizität an der Trommel (4) an den Gehäusekörper (2) zu entladen, und dass der Wasch-/Trockenbehälter (3) aus Kunststoffmaterial hergestellt ist.

4. Wasch-/Trockenmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Erdungsverbindung (10) mit einer beliebigen Stelle der Wasch-/Trockenbehälter (3) zum Übertragen der statischen Elektrizität verwendet wird, die an der Trommel (4) gebildet und an den Wasch-/Trockenbehälter (3) übertragen wird, und dass der Wasch-/Trockenbehälter (3) aus Metallmaterial hergestellt ist.

Revendications

1. Une machine à laver/sécher (1) comprenant un corps (2), une cuve (3) dans laquelle le cycle de lavage est effectué, un tambour (4) dans la cuve (3), qui tourne autour de son propre axe et dans lequel le linge est chargé, un moteur (5) qui tourne le tambour (4), une courroie (6) qui transmet le mouvement du moteur (5) au tambour (4), un arbre de tambour (7) autour duquel le tambour (4) tourne, et une connexion de mise à la terre (10) avec le corps (2) permettant la décharge de l'électricité statique sur le tambour (4), caractérisée par une courroie (6) qui est produite d'une matière non conductrice afin d'empêcher le transfert de l'électricité statique sur le moteur (5) au corps (2) et diminue le bruit sur la ligne de mise à la terre (PE) en tant que le moteur (5) est dans une position isolée, un ou plusieurs supports plastiques (8) qui sont montés sur les pieds du moteur (5) et un filtre RF capacitif (9) qui réduit au minimum le rayonnement électromagnétique à l'entrée d'alimentation électrique.

2. Une machine à laver/sécher (1) selon la Revendication 1 caractérisée par le filtre RF capacitif (9) qui est constitué de condensateurs asymétriques disposés entre des lignes phase (P) et neutre (N) et de condensateurs symétriques disposés entre des lignes phase (P) ou neutre (N) et de mise à la terre (PE).

3. Une machine à laver/sécher (1) selon la Revendication 1 caractérisée par la connexion de mise à la terre (10) avec l'arbre de tambour (7) en ce qu'elle est utilisée pour décharger l'électricité statique sur le tambour (4) au corps (2) et la cuve (3) est produite d'une matière plastique.

4. Une machine à laver/sécher (1) selon la Revendication 1 caractérisée par la connexion de mise à la terre (10) avec un point quelconque sur la cuve (3) en ce qu'elle est utilisée pour transférer l'électricité statique sur le tambour (4) et transférée à la cuve (3) et la cuve (3) est produite d'une matière métallique.

Drawing