1. Choose according to the installation method and actual needs: Household air conditioners are divided into three types according to the installation method or structure: window type, split wall type and split floor type. wall type is selected for family room type, choose floor split type for living room; 2. Select the cooling capacity of the air conditioner based on the area and orientation of the room: Cooling capacity refers to the cooling capacity. generated by the air conditioner per unit of time, which is marked in the air conditioner model. If the selected air conditioner has insufficient cooling capacity, it cannot provide sufficient cooling effect and, due to long-term uninterrupted operation, the service life of the air. The air conditioner will be shortened and the probability of air conditioner failure will be increased. If the cooled capacityThe air conditioner output is selected to be too large, the air conditioner will be turned on and off frequently, damaging the air conditioner compressor. wear ; 3. Choose according to the energy efficiency ratio of the air conditioner: The ratio of the cooling capacity of the air conditioner to the effective input power is called the energy efficiency ratio of the air conditioner. The higher the energy efficiency rate. of the air conditioner, the more energy it saves.
2. Basic points for purchasing air conditioners:
1. Cooling capacity: The output power of the air conditioner should be selected according to the size of the room to ensure the effect, manufacturer
The requirement for p>is an average of 200 watts/square meter . For example, a 18 square meter room requires a cooling capacity of 3,600 watts. You can buy a standard 3,500 watt machine on the market, called a 35 machine, which is a 1.5horses. There are two numbers in the air conditioner model, for example
KFR35GW/***, which means the cooling capacity of the air conditioner is 3500 watts. Horsepower is the unit of input power, and the simple conversion formula between this and output power is 1 horsepower = 2500 watts of cooling capacity. The selection of cooling capacity is the main performance choice of air conditioners. If the cooling capacity is too large, the effect will be better. If the cooling capacity is too small, the purchase cost will be lower, but the effect and power consumption will be poor. will be high. Those with a cooling capacity of less than 2 HP are essentially wall-mounted units, and those with a cooling capacity of more than 2 HP are essentially rack-mounted units.
Energy efficiency reporting level: the energy saving performance of the climatizer are determined by the last number marked on the machine model. Energy efficiency ratio = cooling capacity / input power
For machines with the same cooling capacity, the old standards before June this year had energy efficiency ratios of levels 1 to 5, which were 3.4 3.2 3.0 2.82.6 The new standards after June are 1 to 3 levels of 3.6 3.4 3.2. For example, the cooling capacity of a 1.5 horsepower machine is 3,500 watts. The power consumption of a Level 1 energy-efficient machine is 3,500/3.6 = 976 watts. is 3500/3.2=1094 watts. It can be seen that level 1
p>The power consumption of the compressor is 1094-976=1 18 watts lower than that of the level 5 machine. say, if the compressor works continuously for a hour, the level 1 machine consumes less energy than the level 3 machine. Electricity 0.118 degres. Machines with energy efficiency level 1 are the most energy efficient, but they are also the most expensive from an economic point of view, it is usually more appropriate to purchase a machine with energy efficiency level 2. This The above is the energy efficiency ratio of the fixed speed machine. The energy efficiency ratio of the frequency converter is from level 1 to 5, which are level 5/3.0, level 4/3.4, level 3/3.9 and level 2./4.5 respectively. , level 1/5.2, it is also more cost-effective to purchase level 2.
Will underfloor heating cause formaldehyde to be released from the floor?
If the inlet water of the underfloor heating is hot, it means that the heating temperature is still acceptable, but the return water may be cold for the following reasons:
1. the pressure difference between the supply water and the return water is too small.
2. The cansunderfloor heating connections, the water distributor and its accessories (diverter valve) are blocked. The above reasons may cause poor circulation in the floor heating pipeline. Due to poor circulation, the cycle process from water inlet to return water outlet will take a long time, so the return water appears cold. Saying it's cool is actually just the temperature compared to the temperature of a person's palm.
There are too few geothermal pipes in a new house. Can I add geothermal heating directly to the ground?
Yes, the amount of free formaldehyde released from the panel is positively correlated with temperature and increases as the temperature increases. When the temperature rises above 25 degrees, the amount of formaldehyde released begins to increase significantly. However, when the temperature of the heating by the sol does not exceed 25 degrees, the impact of underfloor heating on formaldehyde present in the ground is very low.
Be extremely careful when choosing flooring. If necessary, ask the flooring manufacturer to issue an environmental test report for the flooring to eliminate the possibility of formaldehyde damage at the source.
Try choosing your home decoration in summer. In the high temperature environment of summer, a large amount of formaldehyde in the soil can be released, further reducing the formaldehyde content indoors.
After moving in, remember to ventilate frequently and place activated carbon and green plants such as spider plants, Sansevieria, aloe vera and agave indoors. 'interior.
The temperature of the underfloor heating should be set between 18 and 23 degrees. In this temperature range, the problem of releaseformaldehyde caused by temperature can be resolved to the greatest extent. suitable for underfloor heating, at the user's temperature, comfortable but not drying.
Floor heating materials should also choose environmentally friendly materials such as green feather auxiliary materials to eliminate possible dangers related to all aspects of floor heating.
Increasing temperature will in fact increase the quantity of formaldehyde released. However, this is an objective reality; you should know that the actual temperature when using underfloor heating is much lower than the normal summer temperature. blindly If you are worried about the formaldehyde problem, it would be better to carefully select qualified and environmentally friendly flooring.
Author: Ying Nuanji
Link: https://www.zhihu.com/question/28651028/answer/47132814
Source: Zhihu< /p >
The copyright belongs to the author. For commercial reprinting, please contact the author for permission. For a non-commercial reprint, please indicate the source.
If the number of geothermal pipes in a new home is too few, installing a geothermal system directly on the ground may not be a good solution. This is because:
First, an insufficient number of geothermal pipes will result in insufficient heating capacity. The heating effect of the geothermal system depends on the total length of the pipes and the area ratio of the room. If there are too few pipes, even if the power of a single pipe is increased, it will be difficult to cover the entire room. will be difficult to get a comfortable internal temperature.
Second, underfloor heating will slow down the heating rate of the air conditioning system. Since the Earth system must firstheat the ground, then heat the air by conduction, this heat transfer process will be relatively slow. If the air conditioning system is used to directly heat the air, the speed will be faster, which is especially important in colder seasons.
Third, the operating cost of underfloor heating is relatively high. The floor heating system needs to work continuously for a long time to guarantee the floor temperature, which will consume more electricity and increase operating costs.
Fourth, floor heating has certain requirements for crushed materials. Some stone and ceramic tile floors are not suitable for underfloor heating. If the existing floor is fixed, it is not practical to modify it.
So if the number of geothermal pipes in the new house is insufficient, what is the best solution. I think thatthe following two options can be considered:
First, install more geothermal pipes? pipes. This method is the most direct and efficient and can completely solve the problem of insufficient heating capacity. However, if the house is finished, the renovation will be more difficult and the cost will be higher.
The second is to cooperate with other heating systems. For example, add air conditioning systems or fireplaces in certain rooms to supplement heating or install auxiliary floor heating systems such as electric blankets and infrared heating panels. At the same time, this can solve certain room heating problems without increasing the cost of the renovation too much.
In summary, if the number of geothermal pipes in a new house is too low, the effect of installing a geothermal system directly on the ground is not ideal. Heating capacity and speed may not be up to par. standard, and the cost will be high. A better solution is to install more geothermal pipes to completely solve the problem or work with other heating systems. Flexible selection according to the actual situation can achieve better heating effect without increasing the cost too much.