Soft connection:
1. The screw thread valve is manufactured by natural synthesis, with nylon cord inside, 16kg pressure bearing, and the screw thread is made of malleable steel. The advantages of this product are that the vibration reduction effect is 30% better than that of stainless steel, and the sound insulation effect is 50% better than that of stainless steel soft connection. Many projects with high environmental requirements will use soft connection. Disadvantages: high installation technical requirements, small compensation amount, service life: 3-5 years.
The following is a brief introduction of fan coil units:
Fan coil units can be divided into five types according to the form: horizontal concealed installation, horizontal open installation, vertical concealed installation, vertical open installation and card type; Horizontal fan coil units can be divided into ultra-thin type and ordinary type according to the thickness of the box; Cassette fan coil
It can also be divided into ordinary type and luxury type
The fan coil unit of central air conditioning can be divided into: 0Pa, 12Pa, 30Pa, 50Pa, 80Pa, etc. according to the static pressure of the unit, here refers to the external static pressure;
The fan coil units of central air conditioning can be divided into two rows of pipes and three rows of pipes according to the number of rows of pipes;
There are also two pipes and four pipes: two pipes are ordinary fan coil units that use cold water for cooling in summer and hot water for heating in winter; Four pipe fan coil units are mostly used in some luxury places. They can use hot water and cold water at the same time, that is, some rooms can be cooled and some rooms can be heated as needed. The two rows of pipes are one for cold water in summer, one for cold water, one for hot water and one for hot water in winter; Three row pipes are two pipes for water inlet, one for cold water, one for hot water and one for water outlet.
working principle
The fan coil unit mainly relies on the forced action of the fan to heat the air when it passes through the surface of the heater, thus strengthening the convection heat exchanger between the fins and the air, which can quickly heat the air in the room. The fan coil unit is the end device of the air conditioning system, and its working principle is continuous recirculation in the unit
The air in the room is cooled (heated) after passing through the cold water (hot water) coil to keep the room temperature constant. Usually, it is sent into the room after being treated by the fresh air unit to meet the demand of fresh air volume in the air-conditioned room.
HVAC technology: how to select the soft connection of horizontal fan coil units from the valve network