What is a central hot water system?

Abstract: The central water heater system refers to a system in which multiple hot water collection points use one water heater and are connected by circulating pipes. How much do you know about the principles of household central water heaters? Compared with other types of water heaters, central water heaters, like central air conditioners, control the entire house. How can a central water heater meet the different requirements of everyone in the home at different times? Let’s take a look at the knowledge that the editor has brought to you about the principles of central water heaters! 1. What is a central water heater system

The central water heater system refers to a system in which multiple hot water collection points use one water heater and are connected by circulating pipes. The central water heater system has The meaning of centralized distribution of hot water is that the hot water is generated from the same place, and then the hot water is stored in an insulated water tank of appropriate capacity. The water tank is then connected to each water-using area through pipes. When water is used in a certain place, the water tank Hot water will be distributed to designated areas. Central hot water systems are usually used in hotels, guest houses, schools, beauty centers, etc. In addition, large houses, duplex houses or apartments, villas, etc. with two or more bathrooms can use this central water heater system.

II. Composition of central hot water system

1. Heat source

There are many choices for heat sources, including coal stoves, electric water heaters, gas stoves, and fuel oil. Boilers, solar hot water, air source heat pumps, etc. Depending on the actual usage, electric water heaters, air source heat pumps or solar energy are mostly used. Based on actual cases and application effects, Zhonghe Electric Water Heating recommends the use of solar electric water heaters, which have stable performance and no worries about seasonal changes, saving energy and reducing costs.

2. Heat exchange

Due to the corrosive nature of water and the scaling caused by heating, it is usually in order to extend the service life of the heat source and ensure water quality. Use a plate heat exchanger or heat exchange fins between the heat source and the hot water storage tank.

3. Thermal storage

In order to ensure that hot water is available 24 hours a day, central hot water generally stores water in thermal storage tanks. The size of the water tank can be determined according to the usage. Generally, hotel baths are calculated based on 50L/person. Household use can be calculated individually based on actual population and usage. The hot water storage tank has the characteristics of being able to store energy, with stable water temperature and guaranteed water quantity. Especially, users with peak and valley electricity price meters can store heat during low-price periods.

4. Circulation system

The circulation system is the heart of the entire central hot water system. Only circulating water can ensure that hot water comes out when the faucet is opened. A good water pump is the core to ensure that you can use it at any time. Zhonghe Electric Plumbing uses German Wilo water pumps to ensure you have worry-free use.

3. Working principle of central water heater

The internal structure of central water heater is mainly composed of four core components: compressor, condenser, expansion valve and evaporator. The working process of the central water heater is as follows: the compressor compresses the returning low-pressure refrigerant and turns it into high-temperature and high-pressure gas and discharges it. The high-temperature and high-pressure heat medium gas flows through the copper pipes wrapped around the outside of the water tank, and the heat is conducted to the water tank through the copper pipes. In the evaporator, the cooled refrigerant becomes liquid under the continuous action of pressure, and enters the evaporator after passing through the expansion valve. Since the pressure of the evaporator suddenly decreases, the liquid refrigerant quickly evaporates into a gaseous state and absorbs a large amount of heat. At the same time, under the action of the fan, a large amount of air flows through the outer surface of the evaporator. The energy in the air is absorbed by the evaporator, and the air temperature drops rapidly, turning into cold air and being discharged into the kitchen. Then the refrigerant, which has absorbed a certain amount of energy, returns to the compressor and enters the next cycle.