US 11,725,367 B2
Cold water discharge apparatus
Kensuke Kataoka, Osaka (JP)
Assigned to SANEI LTD., Osaka (JP)
Appl. No. 17/52,018
Filed by SANEI LTD., Osaka (JP)
PCT Filed Mar. 18, 2020, PCT No. PCT/JP2020/011964
§ 371(c)(1), (2) Date Oct. 30, 2020,
PCT Pub. No. WO2021/157101, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 2020-017716 (JP), filed on Feb. 5, 2020.
Prior Publication US 2023/0151590 A1, May 18, 2023
Int. Cl. E03B 7/04 (2006.01); A47K 3/28 (2006.01); F16K 31/00 (2006.01); E03C 1/04 (2006.01); E03C 1/02 (2006.01)
CPC E03B 7/045 (2013.01) [A47K 3/28 (2013.01); E03C 1/0408 (2013.01); F16K 31/002 (2013.01); E03C 2001/026 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A cold water discharge apparatus comprising:
a first switching valve body, which is temperature-sensitive provided at a branching section of a discharge flow channel and a sold water discharge flow channel, wherein the first switching valve body is configured to open the cold water discharge flow channel by expanding/contracting in a pipe axis direction in response to feed water being below a preset temperature while keeping the discharge flow channel constantly open, and the first switching valve body is configured to close cold water discharge flow channel when the feed water is equal to or higher than the preset temperature; and
second switching valve body, which is a diaphragm type valve, provided so as to ad between the discharge flow channel and the cold water discharge flow channel, the second switching valve body being biased by a spring force in a direction to close the discharge flow channel, wherein the second switching valve body can be switched between:
a hot water discharge mode, in which the discharge flow channel opens due to pressure caused by flow through the discharge flow channel, which is then discharged to the outlet port;
a cold water discharge mode, in which the discharge flow channel closes due to pressure caused by flow through cold water discharge flow channel, which is then discharged to the cold water discharge port; and
a residual water discharged mode, in which the cold water discharge flow channel opens upon being subjected to pressure due to a gravity drop from residual water on a downstream side of the outlet port when the temperature of the residual water in the first switching valve body is below the preset temperature after stopping the flow, thereby allowing the residual water to be discharged through the cold water discharge flow channel.