NEWS

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NEWS

Who is charging electricity for air conditioning heating and cooling?

PubDate:2017-03-06Author:Drying heat pumpSources:Refrigeration networkViews:3899


How much do you know about the working principle of air conditioning and refrigeration?


The general air conditioner is composed of four major components: compressor, condenser, expansion valve and evaporator. It can choose to install auxiliary devices such as pressure controller, temperature controller and drying filter according to the control or use requirements, but four large parts. It is essential. When working, the gaseous refrigerant is compressed into high temperature and high pressure gas through the compressor, and then enters the condenser. The condenser is equivalent to a heat exchange device, and the high temperature and high pressure gaseous refrigerant is exchanged into a low temperature and low pressure liquid refrigerant. The liquid refrigerant passes through the expansion valve. The so-called expansion valve is a throttling device. Because the refrigerant flowing out of the expansion valve is contained, the pressure of the refrigerant is lowered after the pressure is released, and the temperature continues to decrease, becoming a gas-liquid two phase and then entering the evaporator. At this time, the refrigerant re-evaporator performs heat exchange vaporization, and the high-temperature low-pressure gas refrigerant returns to the compressor to continue the circulation.


Air conditioning heating is not easy!


The household air conditioner is generally a cooling system of air-cooled cold air (the central air conditioner also includes water-cooled cold air, water-cooled cold water, air-cooled cold water, etc., the front refers to the heat exchange form of the condenser, and the latter word refers to the heat exchange form of the evaporator), That is to say, during cooling, the refrigerant exchanges heat in the condenser, and the evaporator is blown by the fan, and the evaporator is relatively low in temperature relative to the room temperature, so that the cold air is naturally blown out. If the air conditioner has a heating function, a check valve and a four-way valve are installed on the refrigerant system after the compressor is discharged, and the two functions are to change the flow direction of the refrigerant, and at this time, the condenser and the system in the cooling system The functions of the evaporator are interchanged, that is, the condenser at the time of cooling becomes an evaporator at the time of heating, and the evaporator at the time of cooling becomes a condenser at the time of heating. Therefore, the fan blows the evaporator during cooling, and now the condenser is blown, so the hot air is blown out.


Air conditioning heating costs or cooling costs?


After understanding the working principle of the air conditioner, we can explain the problem of power consumption. Generally, air-conditioning power consumption refers to the power consumption of the motor that drives the compressor. Because the motor power is constant, the power consumption should be the same in the absolute sense. However, it is complicated to explain this. An important parameter to measure the working capacity of air conditioning is the COP value, which is often said to be the energy consumption ratio. Generally speaking, how much cold energy can be generated when I consume 1KW of electricity. The higher the COP, the better the performance, because in the air conditioner. In the design, usually the selection of each component is selected according to the cooling conditions. In the case of cooling, the heat exchange capacity of the condenser is usually equal to the sum of the cooling capacity and the heat loss of the compressor, and the heat exchange of the evaporator is equal to the refrigeration of the unit. Quantity, that is to say, usually the condenser has a larger heat exchange capacity than the evaporator, so the heating capacity of the air conditioner is worse, that is to say, under rated conditions (usually selected rated conditions, convenient comparison) refrigeration COP The value is greater than the heating COP value. It can be seen that the same loss of 1 degree of electricity, the cooling capacity is greater than the heating capacity, or conversely, in the case of the same amount of cooling and heating, the electricity consumed during heating is more, therefore, why is heating more power consumption? This is the reason.