1. Process flow of closed-cell rubber-plastic sponge insulation
(1) First, wipe the surface of the air duct clean, wipe off the dust and accumulated water on the surface and let it dry.
(2) Cut the insulation material according to the size of the air duct.

The word “CNC” is short for Computer Numerical Controlled, which refers to the programmable feature of the machine. CNC machines can perform many functions with minimal human control. CNC machining refers to a range of subtractive manufacturing processes.

The term HVAC (heating, ventilation and air conditioning) ductwork describes any ductwork and vent system used to direct and distribute air in a vehicle or structure. HVAC ductwork is used in a variety of spaces from automobiles to homes to the largest construction sites, but all systems share certain characteristics in that they provide air circulation.

The tightness of the air duct is an important quality indicator for the construction of ventilation and air conditioning projects. The method of testing this quality item can use light leakage detection or air leakage test.

The composite air duct is made of a variety of mixed materials, including phenolic, glass magnesium and other air ducts. Composite air duct is a new generation of environmentally friendly and energy-saving air ducts that replace iron sheet air ducts and glass fiber air ducts. The composite air duct product is made of two layers of high-strength inorganic materials and one layer of thermal insulation material as the base material, and adopts adhesive technology and special structural combination

Stamping and forming equipment, degreasing cleaning equipment, spraying equipment.​​

A CNC machine is a computer controlled manufacturing machine. Purchasing a CNC machine for your pre-insulated duct fabrication is a good choice to speed up the projects.

1.1What is a refrigerant and how does it work?
A working substance that transfers heat between the object to be cooled and the ambient medium, and finally transfers the heat from the object to be cooled to the ambient medium for the refrigeration cycle.

Since ancient times, humanity has sought the shelter of caves to shelter from heat and cold. The fire was the first advance of humanity towards air conditioning, of course the concept has changed a lot, originally it was more of a necessity and today it is a comfort.

1. Basic principles
1.1 Strengthen regional and personnel management to avoid cross infection
During the epidemic, internal divisions should be clarified and management should be strengthened, especially the management of public areas such as halls, kitchens, restaurants, and toilets.

Not using things is as harmful as using them wrongly, the air conditioning equipment tends to be off for many months, especially in the winter months it can cause breakdowns, some devices only work one month a year,

1.1Classification by purpose of use
Comfortable air conditioner---Requires suitable temperature, comfortable environment, no strict requirements for the adjustment accuracy of temperature and humidity, used in housing, offices, theaters, shopping malls, gymnasiums, automobiles, ships, airplanes, etc.