Usually in the choice of many people think coil fan coil technology has been through, each manufacturer's products are similar, therefore, often only from the viewpoint of prices. From the above data, we can see different manufacturers in refrigeration, power consumption, there are indeed many differences in terms of noise. But only in terms of power consumption, the difference between the maximum power consumption of the same product with minimum power consumption 23W, if an office coil run 10 hours a day, 200 days a year to run the calculation (annual use factor of 0.6), annual savings of 27.6 kWh to 1.1 yuan RMB per kWh calculation of operating cost savings of 30 yuan RMB. If the price difference between the two hundred dollars, it increased the initial investment will be recovered in three years time. This is just the economic accounts do not include the benefits of a low-noise coil to improve work efficiency and health staff brought. Will talk about the specific selection should pay attention to several points:
1. coil cooling capacity shortage: This question is currently the most customer complaints is a problem. The main reason for this problem is that many companies do not own the means test, the sample parameters on samples from other manufacturers copied, and own production of coils and thermal performance is poor (mainly by the form of fins , expanding quality, production technology and other causes). It is recommended that the project should be investigated during note that manufacturers test facilities and means, it is difficult to imagine a test device does not own factory can produce a good product to.
2. The amount of wind: we are currently carrying out specific engineering design is often based on the calculated cooling load is selected by fan coil Check out the manufacturer's samples. How to consider the coil volume of air is a problem. On the domestic market, most manufacturers have a single coil of three rows of tubes, but there are also the manufacturers to provide two rows of tube pipe. For most civil air conditioning systems to select two rows of tube coil more favorable (case exceptions to the high humidity). This is because the two rows of tube products in the same cold wind a large amount, which will increase the number of ventilators air-conditioned room, help to improve the precision air conditioning and comfort. Under the same cooling capacity, the use of small temperature difference, the amount of wind blowing, the temperature difference will be made larger than a small amount of wind blowing a better air-conditioning effect.
3. The machine outside the residual pressure: Due to our current national standard test coil air volume fan coil, cold and noise parameters are in the outside static pressure is O under conditions of. But before actual use coil outlet tend to take a short duct and outlet louvers, while some projects is also provided with return air box, so in actual use will find the actual amount of wind the coil to be less than the nominal amount of wind this consequence is room to reduce the amount of wind, air temperature difference increases, the air-conditioned comfort of the decline. Some designers To avoid this situation at the time of selection by mid-coil air volume selection, in order to avoid lack of wind, but it increases the initial investment project. Therefore we propose in the case of national testing standards have not changed, and when we coil selection should give priority to more than pressure (should generally be 10 ~ 15Pa) units.
4. Noise question: What is the current gap between domestic products and foreign products, a larger place, a point is currently the coil due to quality problems complaint. The reason for this problem is that the more coils of the motor and fan configuration and match unreasonable. Another reason is poor management quality manufacturers, assemblers responsibility is not strong, resulting in product quality is unstable. So we refer to it by the authority of the State quality inspection departments issued a product that should be investigated in a product manufacturer (if we must note that several products ready to order) noise test report. For larger quantities of selected projects should be sent to the relevant site sampling quality inspection departments.
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| low noise horizontal concealed fan coil unit |
In addition to the above talking about a few outside, in the coil selection should also pay attention to whether there is quality inspection departments test qualified report issued by condensation. Its condensate pan heat insulation should be used as a whole, the pan should give priority to long drive. Also in the same conditions, priority should be given the appearance of small light-weight products. Parameters on the electrical aspects of the vast majority of domestic manufacturers of products are standard, may be used as the focus of investigation.
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