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Detecting method and detector for detecting load disequilibrium of equipment

A technology of equipment and balance state, applied in the direction of static/dynamic balance test, measuring device, washing machine control device, etc.

Inactive Publication Date: 2006-09-06
WHIRLPOOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Various approaches have been employed in the prior art in an attempt to provide a mechanical arrangement to limit or reduce the unbalanced loads that may occur. These approaches typically involve adding various blocks, either fixed or The motor needs extra power

Method used

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  • Detecting method and detector for detecting load disequilibrium of equipment
  • Detecting method and detector for detecting load disequilibrium of equipment
  • Detecting method and detector for detecting load disequilibrium of equipment

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Embodiment Construction

[0041] The present invention relates to methods and apparatus for detecting out-of-equilibrium conditions in rotating containers, and the invention has applicability in a wide variety of apparatus for placing materials into rotating containers that may be subject to an unbalanced distribution within the container.

[0042]In order to explain the present invention in a preferred embodiment, an automatic washing machine is identified as the device used in the present invention. It should be understood that the invention can be applied not only to vertical axis washing machines as illustrated, but also to horizontal or inclined axis washing machines, clothes dryers, centrifugal extractors and separators, and in rotatable containers containing Other equipment and devices for materials that tend to be placed in a state of disequilibrium.

[0043] In Fig. 1, 20 illustrates a general automatic washing machine, i.e. a machine having a pre-set continuous control device for operating th...

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PUM

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Abstract

A method and apparatus for determining load unbalance in an appliance is provided for an appliance having a vessel configured to receive a supply of material and rotatable about an axis. A control is arranged and configured to accelerate a rotation of the vessel between a series of constant rotational speeds, measure an amount of current with which the motor draws in rotating the vessel at each of the rotational speeds and during each acceleration period, compare the amount of current with a calculated threshold value for each speed and each acceleration period and send a signal indicative of an unbalance condition if the amount of energy exceeds the precalculated threshold value. The vessel may be rotated by use of an electric motor such as a controlled induction motor and the control can be used to measure the electric current drawn by the motor. The threshold values can further be adjusted by comparing the actual line voltage supplied to the motor with a predetermined nominal line voltage.

Description

(1) Technical field [0001] The present invention relates to methods and apparatus for detecting mass material imbalances in equipment, more particularly, for detecting mass material imbalances in rotatable containers of equipment. (2) Background technology [0002] Various appliances, such as automatic washing machines, automatic clothes dryers, centrifugal dehydrators, etc., use rotating tubs, baskets or other containers that are loaded with large quantities of material that may or may not be evenly distributed within the container. A condition in which the load is unevenly distributed or unbalanced, resulting in a situation where the center of mass of the rotating vessel does not coincide with the geometric axes of the vessel. This results in high loads and severe vibrations of the vessel. In equipment, this severe vibration may cause the equipment to move on the floor or other supporting surface. This phenomenon can occur both in rotating containers with a vertical axis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/22D06F33/02D06F37/20
CPCD06F37/203D06F33/48D06F2103/26
Inventor 罗萨里奥·钱奇米诺布伦纳·马丁·夏普热拉尔德·C·斯滕德
Owner WHIRLPOOL CORP
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