Can you tell me whether the water quality of the filter barrel used in the water dispenser is good?

1. What is the function of the pressure barrel of the water purifier?

The structure of the pressure barrel: the top is the water inlet and outlet, the bottom is the inflation port, and the inside is divided into a water storage area and an air bag. The main functions are It is the pure water produced by the RO membrane of the storage water purifier. The most common pressure barrel for household use is 3.2G, which is 12 liters of space. There are also some other uncommon specifications, such as 4G, 11G, 20G, etc. Generally, more than 20G are commercial. Of course, it does not mean that a 3.2G pressure barrel can hold 12 liters of water, because the air bag will occupy a certain amount of space, so the maximum water storage capacity of a general pressure barrel is 70%.

2. Why install a pressure barrel?

Speaking of the reasons for installing a pressure barrel, we need to introduce the working principle of the pressure barrel: the water storage principle and the drainage principle.

Water storage principle: Use the inflated air bag in the pressure barrel to allow the pure water produced by the RO membrane to flow into the barrel through the opened pressure barrel ball valve (at this time, the water pressure is greater than the air bag pressure, and the pure water will continue to flow) flows into the barrel), when the pure water reserve is about 70%, it means that the barrel is full. At this time, the pure water machine will automatically stop working, and the ball valve of the pressure barrel will be closed to realize the water storage function.

Drainage principle: Open the direct drinking water faucet. At this time, the air bag squeezed by the pure water in the barrel will release the pressure and squeeze out the pure water in the barrel. Since the pure water machine is equipped with a check valve to prevent When the water source flows backward, the discharged pure water will continue to flow downstream. It passes through the post-activated carbon that improves the taste of the last stage filter element of the pure water machine, and then is discharged from the faucet to produce pure water. When the water storage in the bucket is exhausted, it will return Return to the original empty bucket state and perform a new round of water storage and drainage process. (The pressure of the air bag in the pressure barrel may decrease after being left for a long time, and there is no guarantee that all water sources in the barrel will be discharged).

From the working principle, the pressure barrel has a storage function. Why is this storage function needed? Because the RO membrane is a high-precision filtration, the water coming out of the RO membrane is pure water, which causes the RO membrane to produce water very slowly. Instant water production cannot meet the needs of consumers for immediate drinking, so the temporary water storage function of the pressure barrel is This comes in handy. When water is not needed, the pure water machine will continue to produce water until the pressure barrel is filled. The pure water machine will automatically stop working. When water is used, the water in the pressure barrel will be discharged until it returns to the empty barrel. state.