Anti-negative-pressure water nozzle

Abstract

The invention relates to an anti-negative-pressure water nozzle comprising a housing with an axial passage. The housing is provided with a water inlet and a water outlet. The anti-negative-pressure water nozzle is characterized in that the housing is further provided with an air inlet communicated with the water outlet, a valve shell is disposed inside the axial passage, the rear of the valve shell is provided with a seal capable of sealing the air inlet, the valve shell is held to keep in the state of moving forward by a first spring inside the axial passage, a sealing ring is disposed between the outer periphery of the valve shell and the inner peripheral wall of the axial passage, the valve shell is provided with an inlet and an outlet, a plug is disposed inside the valve shell, the plug is held to keep in the state of sealing the inlet by a second spring inside the valve shell, and the force of the first spring upon the valve shell is smaller than that of the second spring upon the plug. After liquid passes the nozzle, no residual liquid remains inside; the nozzle is ventilated and is cleaner; when applied to a coffee maker, the nozzle allows the air inlet to be automatically sealed during coffee making, and air is prevented from mixing in coffee to affect the effect of the coffee.

Description

technical field [0001] The invention relates to a water spout, in particular to a negative pressure-proof water spout, which is suitable for coffee machines or similar beverage extraction equipment. Background technique [0002] A coffee machine is one type of beverage extraction device, and its structure generally includes a water tank, extraction parts, heating elements, and a water pump. When in use, place the coffee bag containing the coffee powder in the extraction mechanism of the coffee machine, and then pump the heated water into the chamber where the coffee bag is placed in the coffee machine, and the hot water flows through the coffee powder in the coffee bag , the hot coffee flows from the outlet channel of the coffee machine into the cup. There are many patents related to beverage brewing devices or coffee machines, but the liquid (coffee) outlet mechanism is the same. The beverage flows out directly through a channel. When the hot water passes through the bever...

AI Technical Summary

Problems solved by technology

[0004] During each use of this coffee machine spout with a back pressure valve structure, that is, every time a coffee beverage is dispensed, a stream of clear water flows out first, not coffee. After analysis by technicians, it was found that this stream Clear water is actually the residual liquid left in the spout of the coffee machine during the last use. The residual liquid is easy to breed bacteria. The reason for the residual liquid in the spout is that the interior of the spout is relatively sealed. When the machine (such as a coffee machine) stops working Finally, due to the existence of external pressure, a negative pressure appears in the spout, causing part of the liquid to fail to flow out.

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