Winter
has come, open the window, then can breathe fresh air, but...
Air
pollution is so serious, the energy will loss, the electric charge will be
calculated by step rate, electricity heating charge according to the hot
measurement, and the noise is too big if the window open in the winter.
If
don't open the window, the residual formaldehyde of the decoration is not easy to
go out, and also the carbon dioxide, lampblack, pathogens can't go out, so cause
the indoor air pollution.
How
should we do is this situation?
There
are four big difficulty to overcome this winter indoor ventilation
Do
you know how many CO2 indoor when closed doors and Windows in the winter? Do
you know how much damages to the occupants if the foul air content is high? Do
you know in order to keep healthy, everyone should inhale how many cubic meters
of fresh air per hour ? Do you know how much energy waste will be wasted when
the larger temperature difference between indoor and outdoor when need to open
the window or door for ventilation ?
You may
never thought of these questions, Perhaps you did but never attach importance
to it. Perhaps you attached great importance to it, but restricted by living
conditions, but can't solve it. Don’t worry, let us help you to consult the experts
to conquer these difficulties.
Difficulty
1: Lack of attention
According
to the survey, more than 50% of the respondents ventilated time less than 15
minutes every morning by opening the window. Although, most of the residents
for their expressed dissatisfaction with different levels of indoor air
quality, but for the importance of ventilation, still seems not improve
attention degree.
According
to indoor environment and the health of Chinese environmental sciences
association branch of distinguished expert professor Tian Dexiang introduces,
in a closed room, oxygen in the room is limited, due to respiration, consume
oxygen and all into carbon dioxide and oxygen make room ownership fell, the
rise in carbon dioxide, can cause breathing is not smooth, affect morpheus
quality.Average per person per hour will breathe out 20 liters of co2,
accounting for 4% of the total breath gas, and the amount of carbon dioxide in
the fresh air is 0.03 ~ 0.04%, if more than 0.1% content of carbon dioxide in
the atmosphere is slightly polluted.
Therefore, closed indoor
for a long time in winter, can lead to poor air quality, and affect the
respiratory tract and the whole body of habitant health, scientific ventilation
is very important.
Difficulty
2: standard is not clear
In
Europe, the ventilation index has been the important parameters of home
comfort, some developed countries have even the residence to enforce the terms
of the draft regulations.
And
in China, although in the "standard of indoor air quality" is under official
promulgation, the specified indoor new wind force should be 30 m after/per
person/per hour, but this standard is not living in the building industry is
enforced.Now we don't have a separate building ventilation standard
specification.Building ventilation only involved in the hvac design standard
ventilation rate index, developers and designers are few will consider the
standard of ventilation, detailed cause low buildings ventilation rate can affect
the health of body and reduce work efficiency.
Nowadays,
domestic building ventilation mode and the product is the development trend of
diversification, but especially the residential building overall ventilation
effect compared with abroad is a far cry from, thus laying a ventilated effect
evaluation method, is a problem to be solved at present.
Difficulty
3: Limitation of energy saving
However,
from another point of view, in winter, if for the sake of removing indoor
pollutants, often use excessive ventilation, and let the warm air loss,
temperature drop, causing a lot of energy waste.Therefore, the scientific of
indoor ventilation is the best of both worlds.
If
in economy, such as housing conditions allow, professor tian recommended
intelligent ventilator can be used, it can always detect indoor air quality,
ventilation is carried out and automatically, with it and some filtering and
temperature adjustment function, make the bedroom can not only maintain good
ventilation, but also lower the temperature loss to minimum.
The
difficulties of four: how to ventilation
Pollution
is "suppress" come out.Column so much data, so much the fact that we
are to illustrate this point.
For some
people proposed "outside air is contained in a variety of particulate matter,
not better than the indoor air quality", professor tian explained:
"have to admit that, at present the 1/3 of the urban population is less
than fresh air to breathe. But according to the data shows that ordinary urban
outdoor air negative ions content is 400 ~ 500 / m after, and the negative ion
content in the closed room only after 40 ~ 50 / m, as long as pay attention to
open the window a window time, frequency, and the length of time that open a
window, within a reasonable time for reasonable ventilation, is can introduce
the outdoor fresh air indoor.
In
winter, in the case of internal and external temperature difference is not too
big, can open one or two times a day window, respectively in 9 ~ 10 o 'clock in
the morning and 2 ~ 3 PM (to avoid polluting period) in the morning and
evening, about half an hour to an hour at a time.
Let
the indoor air fresh, is a strong each bedroom to be "mission
critical".
But
these methods can't meet the requirements of real life indoor ventilation, then
in this case, what should we do ?
With
the aid of ventilation equipment then health well indoor.
Indoor
and ventilated take a breath seems to be a cliche topic, but as the country
relevant indicators of be vividly portrayed, how healthy ventilation has
received the attention in the near future.Long-term stay in an airtight air
conditioning environment may often feel chest tightness, shortness of breath,
and in some central air conditioning room will feel much more comfortable, this
is because the part of the central air conditioning with "breath"
device, on the one hand, the indoor air pollution "exhale" outside,
on the other hand, the fresh air outside "sucked" into the room,
"" out-breath reached between the role of ventilated take a breath,
this is what we often say" fresh air system".
