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Front-loading washing machine

A drum-type washing machine, drum technology, applied to other washing machines, washing machines with containers, washing machine control devices, etc., can solve problems such as the collision of the shell and the outer box

Active Publication Date: 2017-10-20
TOSHIBA LIFESTYLE PROD & SERVICES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In this way, when the drum vibrates greatly, the water tank that accommodates the drum and is integrated with the drum will also vibrate greatly, and may collide with the shell that accommodates these drums and the water tank, that is, the outer case.

Method used

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  • Front-loading washing machine
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  • Front-loading washing machine

Examples

Experimental program
Comparison scheme
Effect test

no. 2 approach

[0076] exist Figure 4 In the second embodiment shown, the angular acceleration of the drum 10 located in the rotational speed range L is reduced under the condition that the vibration of the drum 10 is greater than or equal to a specified value, wherein the rotational speed range L includes the water tank provided on the drum 10 6 The resonant rotation speed region K and the rotation speed regions near its upper and lower sides.

[0077]In addition to being detected by the vibration sensors 16 and 17, the vibration of the drum 10 can also be detected by calculating the q-axis current among the currents flowing to the motor 9 by the control device 5, wherein the current flowing to the motor 9 is detected by the current sensor 27 detected. In this case, the motor 9 is a brushless DC motor consisting of a rotor 9a with permanent magnets and a stator with coils. By performing normal vector control, the current flowing to the motor 9 is divided into a d-axis current parallel to ...

no. 3 approach

[0083] exist Figure 5 In the illustrated third embodiment, the control is performed such that the engine speed in the rotational speed region L is reduced. 1 The angular acceleration of the drum 10 in which the speed range L 1 Including the rotating speed region K where the water tank 6 arranged on the drum 10 generates resonance in the left and right directions 1 (For example, about 170rpm) and the speed range around it.

[0084] The vibration in the left and right directions of the water tank 6 is the largest when a member with a variable damping force is used in the damper of the suspension 7. In this case, by using a variable damping force in the damper of the suspension 7 Therefore, it has the function of significantly reducing the vibration in the up-down (vertical) direction of the water tank 6, but on the contrary, the vibration in the left-right direction of the water tank 6 is the largest.

[0085] As in this embodiment, in order to reduce the speed range L 1 Co...

no. 4 approach

[0089] exist Image 6 In the shown fourth embodiment, it is set to reduce the 2 The angular acceleration in which, the rotational speed region L 2 Including the speed range K where the water tank 6 arranged on the drum 10 resonates in the vertical direction 2 (For example, about 250rpm) and the speed range around it.

[0090] The vibration in the vertical direction of the water tank 6 is the largest when a member with a constant damping force (fixed) is used for the damper of the suspension 7. In order to suppress the vibration transmitted to the floor where the washing machine is installed, the damping force of the damper cannot be increased, and the influence of gravity is superimposed. There is vibration caused by uneven distribution of laundry in the upper and lower directions of the superimposed gravity influence. on the largest case.

[0091] As in this embodiment, in order to reduce the speed range L 2 Controlled in the way of angular acceleration, where the rotati...

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PUM

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Abstract

The present invention provides a drum type washing machine reducing transmission of vibration to a floor even if there are a lot of localized laundry, restraining vibration of a drum to be small, and preventing dehydration time from being increased. The present invention comprises: an outer box; a water tank, of which vibration is removed by an anti-vibration device, supported by the anti-vibration device to be installed inside the outer box; the drum installed inside the water tank; a liquid filled type rotary balancer installed in the drum; a motor rotating the drum; and a control means controlling the motor and reducing angular acceleration in a rotational velocity area (L) of upper and lower portions of the drum having a rotational velocity area (K) where resonance is induced to the water tank.

Description

technical field [0001] Embodiments of the present invention relate to a drum type washing machine. Background technique [0002] Conventionally, in drum-type washing machines, when the drum rotates, if the laundry in the drum is unevenly distributed, the drum will vibrate due to unbalanced load, and the water tank accommodating the drum will also vibrate. Especially, in the dehydration stroke of the high-speed rotating drum, if the laundry in the drum is unevenly distributed, the drum will vibrate more. [0003] In this way, when the drum vibrates greatly, the water tank that accommodates the drum and is integrated with the drum will also vibrate greatly, and may collide with the shell that accommodates these drums and the water tank, that is, the outer case. For this reason, a vibration sensor is installed on the water tank, and when a large vibration is detected by the vibration sensor, the rotation of the drum is reduced or stopped, so that the laundry attached to the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06F23/00D06F33/02D06F37/20
CPCD06F23/00D06F33/00D06F37/203D06F2202/12D06F2204/065D06F2214/00
Inventor 金田至功
Owner TOSHIBA LIFESTYLE PROD & SERVICES CORP