Six main properties of the hottest doors and windo

Six main performances of doors and windows

with the continuous development of economy and the continuous improvement of living standards, people's requirements for quality of life are becoming more and more "demanding". For the door and window industry, to choose a suitable door and window, we should not only look at the appearance, but also test the performance of the door and window through a series of door and window data

1. Thermal insulation, that is, K value

2, wind pressure resistance

3, water tightness

4, air tightness

5, daylighting

6, sound and noise reduction

1. What is the K value of doors and windows

concept: K value is also called heat transfer coefficient, which used to be called total heat transfer coefficient. The current national standards and specifications uniformly named 2 is to increase the working voltage of electrolyte as the heat transfer coefficient. The value of heat transfer coefficient K is (2) graphene based anti-corrosion coating for offshore engineering refers to the heat transferred through an area of 1 square meter within 1 hour when the temperature difference between the air on both sides of the enclosure is 1 degree (k, ℃) under stable heat transfer conditions, and the unit is watt/square meter degree (w/m2. K)

heat transfer coefficient K of various door and window materials (w/m2. K):

ordinary aluminum alloy profile: 6. 6

thermal insulation aluminum alloy profile: 4. 0

wooden window frame: 1. 8

5mm white glass: 5. 5

(5+12a+5) mm middle blank glass: 2. 8

(5+9a+5) mm middle blank glass: 3. 0

(5+6a+5) mm middle blank glass: 3. 2

the new material industry is developing rapidly. The simple calculation method of K value of doors and windows (without considering air tightness)

in general doors and windows, the sectional area accounts for about 25%, and the glass area accounts for about 75%. The simple calculation of heat transfer coefficient K value of all kinds of doors and windows is about:

ordinary aluminum alloy doors and windows: k=6. six × 25％+2。 eight × 75％=3。 75

heat insulating aluminum alloy profile doors and windows: k=4. 0 × 25％+2。 eight × 75％=3。 10

calculation method of heat loss of doors and windows:

take the value of heat transfer coefficient K as 3. 5w/(m2. K), heating outdoor temperature 0 ℃, heating indoor design temperature 20 ℃, calculate the total heat loss of the window (Note: it does not include the heat loss caused by air leakage):

3. five × （1。2 × 1。 5） × 20=126W/h

2。 What is the wind pressure resistance of doors and windows

concept: wind pressure resistance refers to the ability of the closed outer (door) window to avoid damage and dysfunction under the action of wind pressure. This index is the most important of the three basic physical properties of doors and windows. The wind pressure resistance performance of doors and windows shall be designed in accordance with the relevant requirements of gb50009 load code for the design of building structures

3。 What is the water tightness of doors and windows

concept: watertightness refers to the ability of the closed outer (door) window to prevent rainwater leakage under the simultaneous action of wind and rain. This index is one of the three basic physical properties of doors and windows

4。 What is the air tightness of doors and windows

concept: tightness refers to the ability of the outer (door) window to prevent air infiltration when it is closed. This index is one of the three basic physical properties of doors and windows

5。 What is the daylighting of doors and windows

concept: daylighting refers to the brightness of light and sunshine. Daylighting coefficient: refers to the ratio of the area of the window opening of the house to the floor area of the house. In general building doors and windows, the area of profile accounts for about 25%, and the area of glass accounts for about 75%

6。 What is the sound insulation performance of doors and windows

concept: under the strong support of the policy, the sound performance of doors and windows refers to the ability of doors and windows to weaken the sound transmission from the sound source to the listener