Title:
WASHING MACHINE
Document Type and Number:
WIPO Patent Application WO/2019/044305
Kind Code:
A1
Abstract:
This washing machine comprises an automatic liquid detergent injection device (109) that supplies liquid detergent that is inside a detergent tank to a drum. The automatic liquid detergent injection device (109) has: a three-way valve unit connected to a first water supply valve and the detergent tank; and a pump unit connected to a water discharge passage in a tank housing case. The three-way valve unit sends either tap water flowing in from the first water supply valve or liquid detergent flowing in from the detergent tank, to the pump unit. The pump unit is configured so as to suck tap water or liquid detergent flowing in from the three-way valve unit and discharge same to the drum. A backflow prevention device (170) is arranged in a water passage connecting the first water supply valve and the three-way valve unit. As a result, backflow of dirty water inside a water tub or liquid detergent up to the water supply valve is prevented by the backflow prevention device (170), even if a water supply passage is in a negative pressure state.
Inventors:
UEDA TAKEHIRO
KIRIYAMA HIROYUKI
HIKINO YU
KIRIYAMA HIROYUKI
HIKINO YU
Application Number:
PCT/JP2018/028171
Publication Date:
March 07, 2019
Filing Date:
July 27, 2018
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
D06F39/08; D06F39/02; D06F33/37
Domestic Patent References:
| WO2017112378A1 | 2017-06-29 |
Foreign References:
| JP2000245993A | 2000-09-12 | |||
| JP2017509464A | 2017-04-06 | |||
| JP2007236702A | 2007-09-20 | |||
| US20120024021A1 | 2012-02-02 | |||
| US20140157835A1 | 2014-06-12 | |||
| JP2013512053A | 2013-04-11 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
Download PDF: