Automatic valve in use for water supply apparatus of coffee maker

Abstract

An automatic valve used on water supply unit of coffee machine is prepared as connecting head of water outlet cavity to water inlet cavity through water outlet set on side wall of water inlet cavity, connecting head of pressure regulation cavity to water outlet cavity through pressure discharge hole set on side wall of water outlet cavity, connecting head of backflow cavity to pressure regulation cavity through backflow hole set on side wall of pressure regulation cavity, connecting head of water inlet cavity to backflow cavity through air exhaust hole set on side wall of backflow cavity.

Description

technical field [0001] The invention relates to parts of a coffee machine, in particular to an automatic valve for a water supply device of a coffee machine. Background technique [0002] Traditional brewers do not get the best extraction because the water takes too long to pass through the grounds, making it impossible to use finely ground coffee. In order to speed up the time of brewing coffee, in order to use finer coffee powder and obtain the best extraction rate, the Italians use the piston (Piston) or pump (Pump) to apply pressure to the hot water during the process of brewing coffee. , Push the pressurized hot water evenly into the filter filled with coffee, so that the brewing time can be reduced to less than 30 seconds, or even ten seconds, so as to speed up the extraction process and obtain a higher extraction rate. This method of using high-pressure and rapid brewing to obtain the highest extraction rate is called eSPressso, and the coffee brewed by this method i...

AI Technical Summary

Problems solved by technology

In actual use, it is found that there are some deficiencies in the existing pump pressurized water supply system: 1. The low pressure used by the pump coffee machine is only 2.5 bar, and the high one reaches 19-20 bar. The pressure that can be maintained by the one-way valve structure of the return channel in the water supply system is relatively fixed, so different return channels need to be equipped for different specifications of pressure water pumps, which has limited adaptability; 2. The boiler needs to be provided with a separate return port and The structure of the corresponding return pipe is relatively complicated; 3. The water pump may be empty due to reasons such as a period of non-use and lack of water in the water tank, resulting in problems such as failure to pump water and difficulty in discharging the air in the pump body, especially when the boiler is under pressure. It is even more likely to damage the water pump due to the lack of water for a long time

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