Vacuum pumps are used when installing air conditioners. There are several types that differ in price and principle of operation. About how to buy a vacuum pump for an air conditioner, how much it can cost and where it is more convenient to make a purchase - read on.
Vacuum Requirements for Air Conditioners
Easy enough and easy to use;- equipped with a valve for lowering ballast gas;
- rubber mount that reduces vibration;
- water cooling of the engine (if it is planned to work with industrial air conditioners);
- the kit includes various fittings for pumping air from the external cooler block;
- sight glass for oil level control.
Types of Vacuum Pumps
Today, you can buy the following types of vacuum pumps for air conditioners:
- lamellar-rotor;
- water ring;
- membrane;
- spool (used by industry, as they are large and very productive).
Rotary vane vacuum pumps
These are pumps of types Vi, HBP, VE, VRD. Their productivity is not more than 63 liters per second. And the residual pressure is not more than 0.5 Pa.
Most in demand are models with a capacity of 20 liters per second.
They can be used in conjunction with deep vacuum pumps.
The price of vacuum pumps for this type of air conditioner is not high (2 - 4 thousand rubles), they are quite compact and light.
But rotary vane pumps are not allowed to be used if the gases are saturated with liquid vapors.
Liquid ring vacuum pumps
Types of pumps NVV and VVN. These are the most reliable and simple mechanisms. Since water acts as a working body, they easily cope with gases saturated with water vapor.
They create a shallow vacuum, not more than 25 mm r.s. And productivity is high - up to 45 cubic meters per minute.
When buying a vacuum cleaner for an air conditioner of this type, its cons should be considered: a shallow vacuum, as well as the presence of a water connection.
A big plus is the price of a vacuum pump for an air conditioner.
Diaphragm Vacuum Pumps
The design of HBM pumps is simple: a chamber equipped with a membrane and a pair of valves. To improve performance and reduce ripple, the mechanism is equipped with paired cameras whose membranes function in antiphase to each other.
Such pumps also cope with the abundance of liquid vapors. If the membranes are made of chemically neutral materials, the pump can be used in work with aggressive gases.
As a vacuum cleaner for air conditioners, they are bought less often, since the price is higher, and also the replacement of valves and membranes is required.
