Not only enterprises or individuals, I believe that when you choose to buy a freshly ground coffee machine, you will first think of going to the major e-commerce platforms to stroll around and see whether the highest sales of several products meet their own or the company's needs. The picture description is fantastic, all kinds of explosion parameters are very attractive to consumers to buy the desire, but the pit is especially much, especially the pressure, if it is an ordinary consumer, it is easy to step on the pit!
To give you the basic knowledge of science, the standard Espresso espresso must be 9bar air pressure, 91.5℃ water temperature, suitable coffee grinding, and 30ml coffee in 22-25 seconds. Such a production method, production technology and parameters and heritage for hundreds of years, after various professional evaluation and debugging, can be said to be unmoved, in line with the world's Italian lovers of the best Italian taste public tips. So all kinds of hype on the market say that 19bar, 20bar small machine is how to do so much pressure?
Yes, this is the means of business operation of e-commerce merchants, even if it can do 20bar, then the question comes, how long can it last?The description of the cheap coffee machine says that the pressure can do 20bar, then the pressure gauge has? How do you prove it? It all depends on whether the production is good or not! There is no way to be fooled, because companies and individuals have no way of knowing whether their parameters are true or false, and cannot be tested. If our home machine has a pressure gauge, we will find that they will not jump to such a high pressure, all at once up to about 12bar, 14bar, and then slowly fall back, will not maintain the manufacturer tells you 19 ah 20 ah these values, in fact, this said pressure is the maximum pressure that the pump can apply, what is the premise? That is, your powder is almost completely blocked the powder bowl, once your powder begins to have water through, it can be understood that the pressure can not be located at a high value. If our home machine has a pressure gauge, we will find that they will not jump to such a high pressure, all at once up to 12bar, 14bar or so, and then slowly fall back. There is no guarantee that the pressure value of 9bar can be maintained, and the quality of the produced coffee is self-evident.
In contrast, the commercial freshly ground coffee machine is a genuine honest person who pays attention to the facts. Making Italian coffee does not need so much pressure, commercial equipment to pursue stable production, the generally accepted pressure is 9-12bar. Commercial ground coffee machine in the process of coffee extraction pressure almost remains the same, the pressure pump itself is different, the low cost of the home machine is also for this reason.