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Title:
NEGATIVE PRESSURE VALVE AND WATER SUPPLY SYSTEM COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2020/248292
Kind Code:
A1
Abstract:
A negative pressure valve, comprising a valve body (1) provided with a water inlet (11), a water outlet (12), and a valve cavity (13), wherein the valve cavity is vertically provided in the valve body; a water inlet hole (131) in communication with the water inlet is provided at the side of the valve cavity; a water outlet hole (121) in communication with the water outlet is provided on the head end of the valve cavity; the valve cavity is provided with a valve rod (15) which can slide vertically to control the openness of the water outlet hole; an elastic return device is provided between the tail end of the valve rod and the tail end of the valve cavity; a flexible balancing ring (16) is provided on the head end of the valve rod; an inner side surface of the flexible balancing ring is sealedly provided on the head end of the valve cavity, and an outer side surface is in communication with the exterior of the valve body; and a water supply system, comprising a water pump (2), a heating body (3), and a water outlet mechanism (4) connected in sequence by means of a water path, wherein the negative pressure valve is provided on a water inlet end of the water pump; the water inlet end of the water pump is connected to the water outlet of the negative pressure valve by means of the water path; the water inlet of the negative pressure valve is connected to the water source by means of the water path.

Inventors:
WU RUICHANG (CN)
SHE QUN (CN)
Application Number:
CN2019/091782
Publication Date:
December 17, 2020
Filing Date:
June 18, 2019
Export Citation:
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Assignee:
GUANDDONG JIBAO ELECTRICAL APPLIANCE TECH CO LTD (CN)
International Classes:
F16K17/04; A47J31/44; A47J31/46; F16K11/065; F16K17/164
Domestic Patent References:
WO2014058724A12014-04-17
Foreign References:
CN102135193A2011-07-27
CN102135193A2011-07-27
CN107990023A2018-05-04
CN208311602U2019-01-01
CN107940077A2018-04-20
CN101832416A2010-09-15
CN101881343A2010-11-10
US4190537A1980-02-26
Attorney, Agent or Firm:
FOSHAN SHUNWEI INTELLECTUAL PROPERTY OFFICE (CN)
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