JP2008113982A5 - - Google Patents

Claims (13)

An inner tub which is a washing and dewatering tub provided rotatably in an outer tub for storing washing water, a driving device for rotationally driving the inner tub, a water supply mechanism for supplying washing water to the outer tub, and the outer tub A washing water circulation mechanism that circulates the washing water accumulated in the bottom, a drainage mechanism that drains the washing water in the outer tub, a water level detection means that detects the water level in the outer tub, and the washing that has been put into the inner tub In a washing machine comprising a cloth amount detection means for detecting the amount of an object, and a control device for controlling the drive mechanism, the water supply mechanism, the drainage mechanism, and the washing water circulation mechanism,
The washing water circulation mechanism includes a circulation pump and a flow path connecting the circulation pump and the outer tub. The flow path includes a first flow path from the bottom of the outer tub to the circulation pump, and the circulation. A second flow path from the pump to the bottom of the outer tank, and a third flow path from the circulation pump to the top of the outer tank ,
A washing machine comprising means for switching between the second flow path and the third flow path. In claim 1,
The washing machine according to claim 1, wherein the control means switches the second flow path and the third flow path by changing a rotation direction of the circulation pump . 2. The circulation pump according to claim 1, wherein the circulation pump is composed of a motor, a runner fastened to the motor shaft, and a cylindrical casing that covers the runner, and the casing includes a suction port at the center of the opposite end surface of the motor. A partition wall protruding inside the peripheral surface, the partition wall including a first discharge port and a second discharge port, the first discharge port connected to the second flow path, A washing machine, wherein a second discharge port is connected to the third flow path. The washing machine according to claim 1, wherein the outer tub includes a concave water receiving portion at a bottom portion, and the first flow channel inlet and the second flow channel outlet are connected to the water receiving portion. 5. The washing machine according to claim 4, wherein the water receiving portion has a partition wall covering substantially half of the upper surface, and an outlet of the second flow path is provided at a lower portion of the partition wall. 5. The washing machine according to claim 4, wherein a rectifying member is provided at the outlet of the second flow path to direct water discharged from the outlet toward the first flow path inlet. 5. The washing machine according to claim 4, wherein the bottom surface of the water receiving portion is an inclined surface in which the second channel outlet portion is high and the first channel inlet portion is low. 2. The water supply mechanism according to claim 1, wherein the water supply mechanism contains a water supply electromagnetic valve and a detergent, and a detergent container that sweeps the detergent with water from the water supply electromagnetic valve and a water supply pipe that connects the detergent container and a water supply port provided on the outer periphery of the outer tub. A washing machine comprising: a rectifying member that rectifies water along the inner peripheral surface of the outer tub at the water supply port. 9. The rectifying member according to claim 8, wherein the rectifying member is formed of an elastic member and is provided so as to open and close the water supply port. When water flows through the water supply port, the elastic member separates from the water supply port and opens the water supply port, The washing machine is characterized in that the rectifying member closes the water supply port when the pressure inside is higher than the pressure inside the detergent container. The control device according to claim 3, wherein the control device controls the water supply mechanism to supply a predetermined amount of water and detergent to the bottom of the outer tub, and the runner is connected to the second discharge port from the first discharge port. The circulation pump is controlled to rotate toward the outlet, and the water and detergent supplied to the bottom of the outer tub are circulated from the first flow path to the bottom of the outer tub through the second flow path. A detergent dissolution process for producing a high-concentration detergent liquid, and the detergent pump produced at the bottom of the outer tub by controlling the circulation pump to rotate the runner in the opposite direction to the detergent dissolution process from the first flow path A washing machine that performs a detergent liquid sprinkling step of sprinkling water from the upper part of the outer tub into the washing tub through the third flow path. 11. The washing machine according to claim 10, wherein the control means controls the amount of water supplied in the detergent supply step in accordance with the result of detection of the amount of laundry by the cloth amount detection means. 11. The washing machine according to claim 10, wherein the control means controls to repeat the operation of temporarily stopping the rotation of the circulation pump and rotating it again in the detergent dissolving step. 11. The washing machine according to claim 10, wherein the control means controls the drive device to continuously rotate or repeat rotation and stop in the detergent dissolving step.