1. Analysis of the use, advantages and disadvantages of the two combined supply:
In short, the outdoor main unit of two-way supply produces cold water in summer. The cold water exchanges heat in the fan coil through the circulation system to blow out the cold air. In winter, it generates hot water, circulates the hot water in the special pipe, heats the ground decoration layer, and heats the ground through the heat transfer of ground radiation and convection (water heating).
Two advantages of joint supply: in the past, families had to install several outdoor units on the external walls, whether they were refrigeration or heating, and the air was two to solve this big problem. It only needed one mainframe to realize the whole house's refrigeration and heating [source refrigeration encyclopedia public]. Both air energy co supply systems basically adopt DC frequency conversion technology, which saves a lot of energy in terms of power consumption.
Disadvantages of two-way supply: it is easy to be affected by the external environment. Air source heat pump mainly transfers the heat in the air to achieve the heating and cooling effect. When the outdoor temperature is low, the evaporator may appear frost phenomenon, which will affect the working efficiency of the evaporator.
2. Analysis of advantages and disadvantages of triple supply:
On the basis of two joint supply, it is called three joint supply. That is to say, the heat generated by the main engine in the process of operation can be used to heat domestic water, and realize three functions of air conditioning, water heating and domestic hot water.
In summer, under the refrigeration mode, the exhaust heat of the total heat recovery compressor can generate domestic hot water of up to 60 ℃ (free hot water is available in a summer), with the maximum energy efficiency ratio of more than 6.5. At this time, the operation efficiency of the unit is the highest; in winter, the air energy heat pump technology is used to convert an electric energy into n heat energy (the conversion efficiency of each manufacturer is different), heating water and supplying The water is warm and hot.