Two ways of electric vehicle air conditioning and heating
At present, the heating methods of electric vehicle air conditioners can be mainly divided into heat pump heating and PTC heating. Although both heat pumps and PTC can achieve heating, there is a big difference between them. We will share with you today.
Heat pump air conditioner
On the basis of ordinary air conditioners, installing a four-way reversing valve and changing the operation of the valve can make the functions of the evaporator and condenser of the original air conditioner interchangeable, thereby changing the function of cooling indoor air to heating indoor air function.
We call this kind of air conditioner that can extract heat from the lower outdoor air in winter to heat the indoor air, and remove the heat from the indoor air in summer and send it to the outside. The air conditioner is called a heat pump air conditioner.
The heat pump air conditioner mainly includes: indoor heat exchanger, outdoor heat exchanger, compressor, capillary tube, gas-liquid separator and four-way valve and other components.
PTC heating element
PTC heating element is also called PTC heater, which is the abbreviation of English Positive Temperature Coefficient. It is composed of PTC ceramic heating element and aluminum tube. This type of PTC heating element has the advantages of small thermal resistance and high heat exchange efficiency. It is an automatic constant temperature, Electric heater for energy saving.
The PTC heating element product adopts U-shaped corrugated heat sink, which improves its heat dissipation rate, and combines the advantages of adhesive and mechanical, and fully considers various thermal and electrical phenomena of the PTC heating element during work. Strong power, excellent heat conduction and heat dissipation performance, high efficiency, safe and reliable.
One of its outstanding features is its safety performance, that is, when the fan fails to stop, the power of the PTC heater will automatically drop sharply due to insufficient heat dissipation, and the surface temperature of the heater is maintained at around the Curie temperature ( Generally around 250 ° C), so as not to produce the phenomenon of "redness" on the surface of heaters such as electric heating tubes.
PTC is mainly used in air conditioners, hot air curtain machines, dehumidifiers, dryers, clothes dryers, heaters, bathroom heaters, automobiles and other equipment that need to provide warm air.
