Drum washing machine

A drum-type washing machine, drum technology, applied to other washing machines, washing machines with containers, washing devices, etc., can solve the problems of hindering drum rotation, abnormal rotation, failure, etc.

Active Publication Date: 2007-03-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in this conventional washing machine, when detergent bubbles are abnormally generated during the washing process due to excessive input of detergent, etc., the detergent bubbles may infiltrate, fill the hot air supply passage, etc., and adhere to the washing machine. electrical parts etc.
Detergent foam has high electrical conductivity because it contains detergent ingredients. Therefore, once it adheres to electrical components such as heaters and fan motors, it may cause corrosion or electrical short circuits, resulting in malfunctions and other problems.
[0008] In addition, if the detergent foam continues to increase, the detergent foam overflowing from the detergent inlet, etc. into the inside and outside of the washing machine will adhere to electrical parts such as the motor, or fall to the ground, and its damage may increase, such as damage to buildings. etc. have an impact
[0009] Furthermore, if the operation is continued in such a state where the detergent foam is abnormal, a large amount of detergent foam will hinder the rotation of the drum, causing poor startup during the dehydration operation (abnormal rotation of the drum), and sufficient rinsing function cannot be ensured. and dehydration and drying function, or the unfavorable situation of prolonged operation time

Method used

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Experimental program
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Effect test

Embodiment approach 1

[0028] Fig. 1 is a side sectional view of a front-loading washing machine according to a first embodiment of the present invention, and Fig. 2 is a control circuit diagram of the partial modularization of the front-loading washing machine.

[0029] As shown in FIGS. 1 and 2 , the rotary drum 31 is formed in a bottomed cylindrical shape, has a plurality of water passage holes 32 on the entire outer peripheral surface, and is rotatably installed in a water tank 33 . The rotary drum 31 has a rotary shaft (rotation center shaft) 34 provided at its rotation center, and the axis direction of the rotary drum 31 is set to be inclined downward from the front side to the rear side. A motor 35 installed at the bottom of the water tank 33 is connected to the rotating shaft 34 to drive the rotating drum 31 to rotate forward and reverse. Several protruding plates 36 are provided on the inner wall of the rotating drum 31 to stir the clothes.

[0030] The opening provided on the upwardly inc...

Embodiment approach 2

[0047] A second embodiment of the present invention will be described with reference to the control circuit diagram of FIG. 3 .

[0048] In step 103, when it is judged that the frequency change based on the standard water level is lower than 1.5 kHz, and the detergent foam is not abnormally generated, in the next step 106, when the frequency change based on the standard water level exceeds the second reference value, such as 1.0 kHz In the case where it is judged that the detergent foam is slightly more, it is judged that there is no need to run the defoaming process 105 when a large amount of detergent foam is generated, and after 3 minutes of running the program (step 107) that weakens the washing action, it returns to normal program (step 108).

[0049] The program (step 107) that has weakened the washing action mentioned here is that the rotating speed of the rotating drum 31 is slowed down such as about 10-20 r / min from the normal program such as 40-50r / min, or the rotati...

Embodiment approach 3

[0054] In this type of drum type washing machine, in the rinsing process, the washing water containing the detergent should be discharged after washing. In order to further remove the washing liquid contained in the clothes from the clothes, the rotating drum 31 should be rotated to use its centrifugal force to remove the washing liquid from the clothes. Centrifuge. In Embodiment 3, when a signal change is detected based on the water level detection of detergent foam and a large amount of detergent foam is generated (such as when the frequency change based on the standard water level exceeds 1.0 kHz), the above-mentioned rinsing process will not be performed. in the dehydration action. More specifically, it generally enters the normal rinsing process after washing. That is, the washing water containing the washing liquid is discharged, centrifuged (dehydrated), and thereafter, water supply, rinsing, draining, and centrifugation are performed a predetermined number of times. ...

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Abstract

A washing machine that prevents failure of electrical parts, etc. caused by a large amount of detergent foam generated during washing. The washing machine comprises a rotating drum (31) with a rotating center shaft in a horizontal direction or an inclined direction; a water tank (33) wrapped around the rotating drum (31) and elastically supported; a water supply valve ( 44); the water level detection device (46) for detecting the water level in the water tank (33); the drain valve (43) for discharging the water in the water tank (33); the control device (48) for controlling actions such as washing, rinsing, and dehydration ), according to the signal change of the water level detection device (46), detect the generation state of the detergent foam in the water tank (33), control the subsequent defoaming process, washing process, rinsing process, water supply device and drainage device, thereby preventing the occurrence of The detergent foam adheres to electrical parts, causing them to malfunction, etc.

Description

technical field [0001] The invention relates to a drum type washing machine, which drives a rotating drum having a rotating central axis in a horizontal direction or an inclined direction, and performs various procedures such as washing, rinsing, dehydration, and drying. Background technique [0002] At present, in this drum type washing machine, the drum can rotate horizontally or inclined as the central axis, and can feed water to the set water level in the tank for washing, rinsing, dehydration, and drying, and has a water level detection device for detecting the water level of the water supply ( For example, refer to Patent Document 1). [0003] Shown in Fig. 4, 5 is the structure of existing washing machine, below just its structure is described. The rotary drum 1 is provided with a plurality of water passage holes 2 on the entire surface of the outer periphery, and is rotatably installed inside the water tank 3 . The rotating shaft 4 is fixed to the rotation center o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06F23/00D06F37/00
Inventor 松冈真二皆吉裕子羽生敏玉江贞之
Owner PANASONIC CORP
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