What is the difference between an open tank and a closed tank

1. Different in natureThe constant pressure of the open expansion tank is 2-3 meters above the higher point of the heating system, and the way to maintain the constant pressure point of a water tank is called the constant pressure of the expansion tank, which is an open system. The atmospheric constant pressure device is to absorb and improve developed countries on the basis of solving the shortage of the first and second generation products.

Experience, successfully developed the third generation of intelligent atmospheric constant pressure device in line with the Chinese market.

2. The expansion capacity is differentIf an open expansion tank is used, it is generally installed at a higher part of the building, 1 meter or 2 meters above the system. The access point is at the entrance of the circulating pump, but sometimes the room is far away, and it is not necessary to connect the expansion pipe to the machine room, so connect the expansion pipe to the outdoor return water main.

Of course, the amount of expansion is selected, which is generally 1 3% of the system capacity3. Different characteristics:The height of the open expansion tank is limited, and it is difficult to meet the requirements when the number of floors in the higher buildings is high and away from the heat source, or when the heat supply is for high-temperature water. Closed water tank as long as there is a change in the temperature of the medium.

For example, for heating, expansion needs to be considered. The initial water filling is about 10 °C, and the operation is 80 degrees or 60 degrees, which needs to be expanded. It is necessary to set up an expansion tank or expansion tank.

The open tank is connected to the atmosphere, which is more likely to come into contact with bacteria and impurities, and cannot be used in pressure systems. Closed water tanks are relatively hygienic, but they need to be cleaned regularly and can also be used in pressurized systems. Due to the pressure bearing of the material, a closed tank** is more expensive than an open tank.

The disadvantages of the water tank type water boiler.

1. The working principle of the traditional water tank electric water boiler:

A square large water tank structure, there is a float switch on the right side of the top, open the faucet to drink, the float on the top will fall, the switch valve will be opened, the raw water outside will flow directly into the water tank, fill the tank so that the float continues to float on the top. Raw water is easy to form when mixed with boiled water.

Yin and Yang Water "People who drink water will always drink "half-raw" Yin and Yang water. The harm of yin and yang water: if people drink "yin and yang water" for a long time, it will harm their health, cause various intestinal infectious diseases, and increase the possibility of bladder cancer and rectal cancer by 21%-38%.

2. "The formation of a thousand boiling water":

When boiling water is not used for a long time, the boiling water temperature in the water boiler will drop, and when the water temperature drops to a certain temperature, the equipment will continue to heat and form "thousands of boiling water". "Thousands of boiling water hazards".

Drinking "thousands of boiling water" for a long time will interfere with people's gastrointestinal function, which will make the nitrite content in the water exceed the standard, damage people's health, and be prone to temporary diarrhea. Over time, it can also cause cancer.

3. Unhygienic:

According to a report issued by the national environmental monitoring department, if the inner tank of the traditional water boiler is not cleaned for more than 3 months, the water will be polluted twice during the operation of the equipment, which will breed a large number of bacteria, residues and even bloodworms, which will attach to the inner wall of the hot bile and become a toxic "additive". When these substances enter the human body, they can cause diseases of the digestive, nervous, urinary and hematopoietic systems.

4. Inconvenience:

High temperature boiling water, no water temperature adjustment system; If you can't solve the overnight water, you have to manually pour out the excess water the next day; It is not possible to get out of the boiled water quickly, and it takes 30-60 minutes to drink the boiled water.

5. Unsafe:

There is no automatic control system, no leakage protection device, and it is easy to have the risk of electric shock, if the float valve is soaked in water for a long time, it is easy to scale and rot, resulting in the water level being out of control, and there are unsafe hidden dangers.

6. No energy saving:

When no one drinks water for a day, the water in the water tank is insulated and consumes electricity, which is less than kilowatt-hour of electricity and more kilowatt-hour of electricity, and the operating cost is too high. Energy-saving water boiler in filtration, energy saving up to 85%.