The invention discloses a sparkling water
machine with a low-pressure maintaining function. The sparkling water
machine comprises a main
machine, a gas
bottle, a
water bottle, a first mounting seat, a first valve cavity, a first gas guide channel, a first valve body, a
pressure feedback shutdown structure, an active
exhaust valve body, an exhaust hole and a first reset spring. After bubble water is prepared,
carbon dioxide gas in the
water bottle can be directly and completely exhausted through the active
exhaust valve body, and therefore the
water bottle can be directly taken out. If a user does not need to drink directly after preparation is completed, active exhaust can be avoided through the active
exhaust valve body, high-pressure
carbon dioxide enters the first valve cavity through the first air guide channel and then is exhausted along the exhaust hole, and the amount of the exhausted
carbon dioxide is controlled through the first valve body; and finally, the water
bottle enters a low-pressure state with relatively
low carbon dioxide gas concentration, and carbon dioxide in the bubble water is not easy to separate out due to the fact that certain carbon dioxide pressure is still kept in the water
bottle, so that the concentration of the bubble water can be ensured, and
residual pressure can be discharged when drinking is needed.