| Basic Common Knowledge |
| |
| I. What should be paid attention to when selecting an air conditioner? |
| 1) First check to see if there are any wears or tears, cracks, concave-convex
or any other defects in the outer appearance of the indoor unit and outdoor
unit. |
| 2) Open the cover plate of the indoor unit to see if the outer appearance of
the evaporator is neat and well-arranged. |
| 3) Check to see of the outer appearance of the outdoor unit condenser is neat
and well-arranged. |
| 4) Check to see if all information documents (including the instruction
manual, the warranty certificate, etc.) are complete and available. |
| |
| II. How to identify the true performances of the air conditioners? |
| 1) Read the performance parameter information of the air conditioner. |
| 2) Look into the ratio between the cooling (heating) capacity and the total
input power on the performance parameter table (i.e. the cost-effectiveness
ratio). The higher the ratio, the more energy-saving the unit will be. |
| 3) Check the heating capacity when selecting a cooling/heating air
conditioner. The higher the heating the capacity, the better heating performance
the system will have, and the more energy-saving it will be. |
| 4) Look into the operational noise indications for the indoor and outdoor
units on the performance parameter table. The operational noise value on the
table is the actual noise level of the units. The lower the value is, the
quieter it will operate. |
| 5) Look into the activation current and operational current to see if the
load of the available electric meter is sufficient for the operation of the air
conditioners. |
| |
| III. How to select the performances of the air conditioners? |
| 1) Select the one easy to operate.
In general, the air conditioners with high level of automated
controls and less control buttons are easier to operate.
Currently, the most advanced control methods in domestic air
conditioners are optic control method and simulated intelligent
logic control method. |
| 2) Select the
units with better energy-saving performances. The energy saving
performance of an air conditioner has much to do with the air
delivery patterns, apart from its cost-effectiveness and
operational capabilities. Currently, the most advanced air
delivery patterns for the domestic air conditioners are the
swinging delivery pattern and three-dimensional delivery
pattern. |
| 3) Select the one
with comforting effects, such us the physically sensitive
control performance air conditioners which can automatically
adjust the air delivery patterns and room temperatures in
accordance with the feeling of the human bodies and the air is
delivered smoothly and mildly without very low temperatures. |
| |
| IV. Room
space and selection of cooling capacity: |
| The selected
cooling capacity should be larger than the total consumption of
the room using the air conditioners, namely, the room space area
and the workload for each square meter of room space should
match the cooling capacity of the air conditioner to be
selected. In addition, the factors that may affect the needed
cooling capacity not only include the space area of the room,
but also cover the other important factors like the directions
of the doors and windows, the direction of the exterior walls,
the number of inmates, the use of the other electric facilities
and apparatuses in the room, etc. |
| |
|
|
Cooling Capacities
Needed for Rooms with Different Structures |
| Item(s) |
Cooling
capacity to be added |
|
Windows to east and south |
140 W/m2 |
| Windows to
southwest and west |
290 W/m2 |
|
Windows to northwest and southeast |
168 W/m2 |
| Wall thickness
facing sunshine below 300mm |
209 W/m2 |
|
Wall thickness facing sunshine above 300mm |
151 W/m2 |
| Rooftop with
ceiling |
12 W/m2 |
|
Rooftop without partition |
24 W/m2 |
| Rooftop with
cooling facility on upper floor |
12 W/m2 |
|
Number of people in the room |
180 W/m2 |
| Electric
apparatuses used in the room |
1000 W/m2 |
|
Note:
Normally, the cooling capacity needed for each square meter is
120 W/m2. |
|
Cooling capacity Needed in Various Room
Conditions |
| Item(s) |
Cooling
capacity (W/m2) |
|
Ordinary rooms |
145 |
| Garment store or
jewelry store |
198 |
|
Living room, dinning room |
169 |
| Bank hall,
department store |
221 |
|
Small offices |
145 |
| Conference rooms,
restaurants |
442 |
|
Common offices |
175 |
| Tea houses |
221 |
|
Barbers' shop |
290 |
| Cinema or theater
houses (per person) |
290 |
|
Museums, libraries |
175 |
