Air conditioning heating principle
Air conditioning heating, cooling is mainly to move heat. When heating, the air conditioner moves the outdoor heat to the inside of the room; when cooling, the air conditioner moves the heat in the room to the outside.
Heating wire energy efficiency ratio can only reach 1: 1, which consumes 1 kilowatts of electricity, generating 1 kilowatt of heat. Air conditioning has the highest energy efficiency in all heating products. It can reach about 1: 3, which consumes 1 kilowatts of electricity to move 3 kilowatts of heat. So air-conditioning saves energy.
Air conditioning heating and cooling principle is using the characteristics of Freon condensation liquefaction heat and evaporation vaporization heat to increase or reduce the temperature of the indoor air.
When air conditioning is heating, Freon gas is pressurized by the compressor to become a high temperature and pressure gas. Then it comes into the indoor unit of the heat exchanger (at this time for the condenser) and Condensate liquefaction heat to become a liquid. At the same time it heat the indoor air to achieve the purpose of increasing the indoor temperature. The liquid freon is depressurized by a throttling device and enters the heat exchanger (in this case, the evaporator) of the outdoor unit. The evaporative gasification absorbs heat and becomes a gas while drawing the heat of the outdoor air (the outdoor air becomes colder). The freon to be gas enters the compressor again to start the next cycle.
When Condenser works 1 minute, if it wasn't blew by the fan, then the surface temperature can reach 40-50 degrees.
By the way, when heating, the indoor radiator changes into a condenser. When cooling, the outdoor radiator changes into a condenser. This is achieved by an electromagnetic 4-way switch.
So, in the case of a larger room, the use of air conditioning is more energy-efficient in winter. Electric heaters and heaters are used locally.
Air conditioning heating shortcomings: Can not heat quickly. If there is condensation, it needs to defrost first, which costs 10-20 minutes. If the outdoor temperature is below minus 5 degrees, air conditioning heating effect is not good because air conditioning is not working at this time. Inverter air conditioner is better,it can go to minus 15 degrees.
Why? For example, at zero, air-conditioning heating can only reach 70%. To minus 3 degrees, the heat supply only reached 30%. When the temperature is below zero, the outdoor part of the air conditioner is prone to freezing, frosting and so on. Air conditioning outdoor unit must be constantly defrost, resulting in a slow heating or heating power is low. In order to alleviate this low heating power situation, some models are equipped with electric auxiliary, but the power of electric auxiliary generally can not add a lot(Take into account the safety factor is generally on-hook 600W-800W). So it can only alleviate the situation of poor heating, but can not be fundamentally resolved. From the working principle, air-conditioning heat pump heating is a more economical way. Electric auxiliary heating equipment use the resistance to heat. The ultimate heating effect The input power and output heat into a 1: 1 ratio (that is, 600W of electrical power to produce 600W of heat). The air conditioning use the heat "transfer" principle to cool and heat that can get more than 100% efficiency (usually 1000W can produce 2600W of heat). However, in the weather below 0 ℃, affected by the low temperature, the heating effect of air conditioning is not good. Cooling capacity and heating capacity is the result of testing under standard operating conditions in the air conditioning instructions. In other external temperature conditions, air-conditioning cooling and heating effects are not reflected. In heating, the current standard operating temperature is 7 ℃.