Washing machine using BLDC motor

Abstract

A washing machine using a BLDG motor is disclosed. The washing machine having a brushless DC motor for rotating a tub includes a case, a dynamic braking resistor, mounted with respect the case, producing heat energy when the brushless DC motor is braked, and a mount, coupled to the case and the dynamic braking resistor, for impeding a transfer of the heat energy of the dynamic braking resistor to the case.

Description

[0001] This application claims the benefit of Korean Application No. P2003-090700, filed on Dec. 12, 2003, which is hereby incorporated by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a washing machine using a BLDC motor, and more particularly, to a mount fixing a dynamic braking resistor of a washing machine. [0004] 2. Discussion of the Related Art [0005] Generally, a washing machine as a representative one of home appliances is an apparatus for removing filth or dirt attached to a laundry using interaction between water and detergent. Such a washing machine is categorized into various types according to a laundry-impacting system. A washing machine using a BLDC (brushless direct current) motor removes the dirt attached to the laundry by rotating a tub at a different speed during washing or dewatering by regulating the speed of the BLDC motor. The washing machine is explained in detail by referring to FIG. 1 as foll...

AI Technical Summary

Benefits of technology

[0009] An object of the present invention, which has been devised to solve the foregoing problem, lies in providing a heat-transfer preventing mount, by which heat generated from a dynamic braking resistor is prevented from being transferred to a case or other devices of a washing machine.

[0012] The mount may include a first mounting member for fixing the dynamic braking resistor, and a second mounting member for separating the fixed dynamic braking resistor from the case. The first and second mounting members are integrally formed as one body. The first mounting member may include a flange fixed to the dynamic braking resistor, and a frame, connected to the second mounting member, for supporting the flange. The frame may have at least one aperture for facilitating air circulation with respect to the dynamic braking resistor. The frame may include a bent perimeter for imparting the frame with rigidity.

[0015] The mount may include a plurality of substantially flat surfaces formed of a rigid material, and a channel, formed in the flat surfaces, for increasing the rigidity of the flat surfaces. Herein, the first mounting member may include parallel sides joined by a central strut, the parallel sides being supported on the second mounting member. The first mounting member may also include a plurality of channels, respectively formed in the parallel sides and the central strut. The second mounting member may include four legs, each leg supporting the first mounting member at a separate point. The second mounting member may also include comprises a plurality of channels, respectively formed in each leg. The dynamic braking resistor may be disposed above the case. And, the mount may be secured to an upper surface of the case. The mount may be formed of a material having a low heat transfer coefficient.

[0017] Herein, the frame may have at least one aperture for facilitating air circulation with respect to the dynamic braking resistor. And, the flange, the frame, and the at least one leg may be formed as substantially flat surfaces of a rigid material, at least one surface comprising a channel for increasing the rigidity of the flat surfaces. At least one of the flange, the frame, and the at least one leg is formed of a material having a low heat transfer coefficient.

Problems solved by technology

However, the heat generated from the dynamic braking resistor transforms a topside of the case while the dynamic braking resistor thermally dissipates electricity.

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