Patent Grant
10920358
This application claims priority from European Patent Application No. 18160973.6, filed Mar. 9, 2018, which is hereby incorporated by reference it its entirety.
This invention refers to a balancing apparatus for preventing vibrations and loud running in a drum of a washing machine while operating according to claim 1.
Washing machines are devices that allow rinsing, washing and drying of laundries. When the washing machine is operating, drum in the washing machine may experience vibrations and also becomes unbalanced. The vibration or unbalance of the drum arises when the laundry is not distributed properly in the drum or the drum is not well designed during manufacturing. The vibratory operation of the drum causes a user to feel uncomfortable due to loud running sound. Additionally, the vibrating operation of the drum reduces the life span of the washing machine. Various methods for preventing vibrations are known in the prior art such as providing balancers and imbalance-compensating devices. However, providing balancers and imbalance-compensating devices may cause structural complexity.
Prior art document US2016258102 (A1) discloses a washing machine having an improved balancing function. The washing machine includes a cabinet, a drum disposed in the cabinet to be rotatable, a balancer installed at the drum to offset an unbalanced load generated at the drum when the drum is rotated, and at least one magnetic body disposed between the balancer and the drum.
Another prior art WO2017009170 (A1) relates to a domestic appliance for caring for laundry items, comprising at least one laundry drum for holding laundry items and at least one imbalance-compensating device which is arranged on the laundry drum and which has a housing in which a plurality of compensating elements are movably contained, of which at least some are magnetic and, at least in some regions, are designed as permanent magnets, wherein the imbalance-compensating device has at least one magnetically interacting component for magnetically interacting with the magnetic compensating elements which magnetically interacting component is rotationally coupled to the laundry drum, wherein the magnetic compensating elements and the magnetically interacting component have such a magnetic holding force with respect to each other that the compensating elements are not released from the magnetically interacting component until a rotational speed of the laundry drum is greater than a specified reference rotational speed UR of the laundry drum.
The subject-matter of the prior art does not provide a balancing apparatus with simple configuration to prevent vibrations and loud running in a drum of a washing machine while operating.
It is therefore the object of the present invention to provide a balancing apparatus for preventing vibrations and loud running in a drum of a washing machine while operating by using a simple configuration.
The before mentioned object is solved by a balancing apparatus that prevents vibrations and loud running in a drum of a washing machine while operating by using magnetic property and simple configuration according to claim 1. The present invention refers to a balancing apparatus for preventing vibrations and loud running in a drum of a washing machine while operating. The balancing apparatus according to the present invention preferably comprises of a plurality of propellers attached to the drum and at least two half rings. The plurality of propellers is attached to the drum. The two half rings are configured to cover the drum. The propellers and the half rings are magnetically polarized while electric current is passing through the propellers and half rings. The drum is balanced by forming similar polarity in poles of the half rings and the poles of the propellers facing each other.
This solution is beneficial since such a balancing apparatus enables prevention of vibrations and loud running in a drum of a washing machine while operating using magnetic property. While the washing machine is operating, the propellers and the half rings are magnetically polarized by passing electric current through the propellers and the half rings. The drum is balanced by forming similar polarity in the poles of the propellers and the poles of the half rings facing each other. Hence the vibrations and loud running is prevented and the balancing of the drum is achieved using magnetic property of the propellers and the half rings. Additionally, the implementation of such a balancing apparatus is simple and effective.
Further preferred embodiments are subject-matter of dependent claims and/or of the following specification parts.
According to a preferred embodiment of the present invention the balancing apparatus further includes at least one ball and a sensor. The ball is placed between the half ring and the drum. The ball is magnetically polarized while the electric current is passing through the ball. The sensor is configured for measuring the distance from the ball to the drum and the distance from the ball to the half ring. The distance measured by the sensor enables to determine whether the poles of the half rings and the poles of the propellers facing each other are similar or opposite.
The poles of the half rings and the poles of the propellers facing each other are identified similar when the difference between the distance from the ball to the drum and distance from the ball to the half ring is zero. The poles of the half rings and the poles of the propellers facing each other are identified opposite when the difference between the distance from the ball to the drum and distance from the ball to the half ring is non-zero. The opposite polarity in the poles of the half rings and the poles of the propellers facing each other are changed to similar polarity by reversing the current flow through the half ring and/or the propellers.
Further benefits, goals and features of the present invention will be described by the following specification of the attached figures, in which components of the invention are exemplarily illustrated. Components of the devices and method according to the inventions, which match at least essentially with respect to their function, can be marked with the same reference sign, wherein such components do not have to be marked or described in all figures.
The invention is just exemplarily described with respect to the attached figures in the following.
According to an embodiment of the invention, the propellers 3 and the half rings 2 are made up of magnetically polarizable materials. The plurality of propellers 3 is attached to the drum 1. The two half rings 2 are configured to cover the drum 1. The propellers 3 and the half rings 2 are magnetically polarized while electric current is passing through the propellers 3 and half rings 2. The drum 1 is balanced by forming similar polarity in poles of the half rings 2 and the poles of the propellers 3 facing each other. Thus, the propellers 3 inside the drum 1 are pushed by the external magnetic force applied by the half rings 2 outside the drum 1 and thus the drum 1 is balanced.
This solution is beneficial since such a balancing apparatus 100 enables prevention of vibrations and loud running in a drum 1 of a washing machine while operating. While the washing machine is operating, the propellers 3 and the half rings 2 are magnetically polarized by passing electric current through the propellers 3 and the half rings 2. The drum 1 is balanced by forming similar polarity in the poles of the propellers 3 and the poles of the half rings 2 facing each other. Hence, the vibrations and loud running is prevented and the balancing of the drum 1 is achieved using magnetic property of the propellers 3 and the half rings 2. Additionally, implementation of such a balancing apparatus 100 is simple and effective.
According to an embodiment of the invention, the balancing apparatus 100 further includes at least one ball 4 and a sensor 5. The ball 4 is placed between the half ring 2 and the drum 1. The ball 4 is magnetically polarized while the electric current is passing through the ball 4. The sensor 5 is configured for measuring the distance from the ball 4 to the drum 1 and the distance from the ball 4 to the half ring 2. The distance measured by the sensor 5 enables to determine whether the poles of the half rings 2 and the poles of the propellers 3 facing each other are similar or opposite.
The poles of the half rings and the poles of the propellers facing each other are identified similar when the difference between the distance from the ball 4 to the drum 1 and distance from the ball 4 to the half ring 2 is zero. The poles of the half rings 2 and the poles of the propellers 3 facing each other are identified opposite when the difference between the distance from the ball 4 to the drum 1 and distance from the ball 4 to the half ring 2 is non-zero. The opposite polarity in the poles of the half rings 2 and the poles of the propellers 3 facing each other are changed to similar polarity by reversing the current flow through the half ring 2 and/or the propellers 3.
Thus, the present invention provides a balancing apparatus 100 that prevents vibrations and loud running in a drum 1 of a washing machine while operating by using magnetic property and simple configuration. The balancing apparatus 100 according to the present invention preferably comprises of at least two half rings 2 and a plurality of propellers 3. The plurality of propellers is attached to the drum 1. The two half rings 2 are configured to cover the drum 1. The propellers 3 and the half rings 2 are magnetically polarized while electric current is passing through the propellers 3 and half rings 2. The drum 1 is balanced by forming similar polarity in poles of the half rings 2 and the poles of the propellers 3 facing each other.
| Number | Date | Country | Kind |
|---|---|---|---|
| 18160973 | Mar 2018 | EP | regional |
| Number | Name | Date | Kind |
|---|---|---|---|
| 5561990 | Berkcan et al. | Oct 1996 | A |
| 20160258102 | Kim et al. | Sep 2016 | A1 |
| Number | Date | Country |
|---|---|---|
| 10 2016 220112 | May 2017 | DE |
| 2012089453 | Jul 2012 | WO |
| 2017009170 | Jan 2017 | WO |
| Entry |
|---|
| Extended European Search Report issued in connection with European Patent Application No. 18160973.6 dated Sep. 14, 2018, 7 pages. |
| Number | Date | Country | |
|---|---|---|---|
| 20190276969 A1 | Sep 2019 | US |
