What's the use of the exhaust valve on the coffee bag? Can the exhaust valve squeeze and smell incense?
Squeeze, pinch, it will have so much aroma spurted out of the pinch.
![图片](https://www.gafei.com/uploadfile/202307/3eb4d315dda4e58.png)
Many people may have observed that when buying coffee beans, customers will first put their nose in front of the only hole in the bag, squeeze the bag with their hands and smell the gas squeezed out of the hole.
![图片](https://www.gafei.com/uploadfile/202307/f1ce7ab6a676fca.jpg)
I've seen "Why doesn't the coffee smell good? "the friends of this article should be able to think of it immediately, yes! This gas is the carbon dioxide and volatile aroma emitted by coffee beans. It really smells good! So often some friends will also squeeze it when they buy it home and take a sip before making coffee, which is better than a living fairy.
Although! Of course! This hole is used for exhaust, but it is not used to squeeze and smell incense.
The use of holes
This hole is actually a valve device called "one-way exhaust valve". Like the one-way street of a car, gas can only go out in one direction, not in the other.
![图片](https://www.gafei.com/uploadfile/202307/3fc1794440af384.jpg)
When coffee beans are just roasted, their bodies contain a lot of carbon dioxide and emit a lot of carbon dioxide in the next few days. However, after the coffee bean comes out of the oven to cool down, we will put it in a sealed bag. If there is no one-way exhaust valve, a large amount of carbon dioxide will fill the whole bean bag. When the bean bag can no longer support the continuous emissions of the beans, it is easy to burst.
![图片](https://www.gafei.com/uploadfile/202307/fe90e94a8330c0e.jpg)
When there is an exhaust valve, the bag is filled with gas, and when the beans discharge new gas, the internal pressure will be higher than the external pressure. So as to push open the exhaust valve plate and discharge the excess gas outward. When the excess gas is discharged, the pressure returns to normal, and the exhaust valve will return to the closed state. Therefore, the one-way exhaust valve has only a simple function of "preventing gas from exploding the bag".
![图片](https://www.gafei.com/uploadfile/202307/7e50e8986502b36.jpg)
An one-way exhaust valve is used to allow coffee beans to be stored in an almost airtight space. The emission of carbon dioxide will have the volatile aroma of the coffee bean itself, and when the coffee bean comes into contact with the air, it will accelerate the emission of carbon dioxide, resulting in the loss of a large amount of aromatic substances, but because the packaging can not bear too much internal pressure, so an one-way exhaust valve is designed separately.
![图片](https://www.gafei.com/uploadfile/202307/38a829af3b04a99.jpg)
Why is it not recommended to squeeze the bean bag to smell the fragrance?
This is because when the gas in the bean bag reaches saturation, it can restrain the speed of the coffee bean emission, so that the exhaust process becomes slow, which can effectively prolong the taste period, and when you artificially squeeze the gas out of the bean bag, the pressure in the bag will be different from that of the outside world. It can be seen that it is designed to solve the problem of a large amount of exhaust in the first few days of fresh beans and breaking the coffee bag in the course of transportation.
So, if we want to prolong the taste period, in addition to not squeezing the bean bags, we can also choose to use stickers and other items to seal the exhaust valve.
![图片](https://www.gafei.com/uploadfile/202307/f5bf2863d5f2.jpg)
Or, transfer the open coffee beans to a sealed container, which can effectively reduce the exhaust speed of the beans and prolong the best taste period of the coffee beans.
![图片](https://www.gafei.com/uploadfile/202307/d954fc84fb25ca4.jpg)
-END-
Front Street Cafe
No. 10 Baoqian street, Yandun road, Dongshankou, Yuexiu district, Guangzhou, Guangdong province
![图片](https://www.gafei.com/uploadfile/202307/9e9d6e86fe514.jpg)
- Prev
The expression of the grindability of hand-brewed coffee, how to distinguish between coarse and fine sugar
From the beginning to the end, we do not have a clear description of the thickness of the degree of grinding. So when people talk about the degree of grinding, there will be a variety of different expressions, some people will use "fine sugar" to describe it, some people are used to using the scale size of the bean grinding equipment, and others use the sieving rate as in the front street. Although these methods
- Next
When you start a coffee shop, the first bucket of money comes from selling equipment.
▲ click to follow | Daily boutique Coffee Culture Magazine Coffee Workshop is regarded as one of the heaviest businesses of this century, and the coffee industry continues to attract countless people yearning for "poetry and distance" to join it and start their own business. However, in the face of the cruel reality of doing business for the first time, how many people have no choice but to start a business
Related
- The coffee shop assistant steals his own credit card machine to collect money! Court: No repayment required
- What are the characteristics of Panama's coffee producing areas? How to grade Jade Manor
- Roads in many places in Colombia are blocked! Influencing transportation in multiple industries
- Shoulder to shoulder! The coffee exhibition became a national gathering without threshold!
- Panama BOP award-winning Jensen Manor What is rose summer coffee? The difference between Jensen Manor and Emerald Manor?
- How does the concentration of espresso affect? What does shot mean? How to say strong coffee?
- Passers-by tear up coffee shop posters for photos! Shop owner: I am furious
- Lucky installed a tea drinking machine?! Employee: Happy and sad!
- What does Kenyan coffee taste like? What classification does Kenya use?
- Coffee bean prices are high! Nearly 60% of Brazil's land is affected by drought and fires!