As the name implies, the heat pump is a mechanical device that transfers heat from a low-temperature heat source to a high-temperature heat source. For example, in winter, outdoor air, surface water, groundwater and so on are low-temperature heat sources, while indoor air is a high-temperature heat source. Heat pump air conditioner is able to transport the heat of the outdoor environment to the indoor environment. To figure out the working principle of the heat pump, we must first understand the working principle of the refrigeration system. Refrigeration system (compression refrigeration) generally consists of four parts: compressor, condenser, throttle, evaporator. The working process is: low temperature and pressure liquid refrigerant (such as Freon), first in the evaporator from a low temperature heat source (such as chilled water) absorbs heat and gasification. The compressor then draws the vaporized refrigerant gas in the evaporator and compresses it into the condenser, at which point the refrigerant gas becomes a high-temperature, high-pressure gas. The high-temperature high-pressure gas is condensed in a condenser by a high-temperature heat source (for example, cooling water) to become a liquid and becomes a high-temperature and high-pressure liquid refrigerant. And then intercepted by the throttle valve into a low temperature and low pressure liquid refrigerant. This completes a refrigeration cycle. For a split heat pump air conditioner, the condenser is placed outdoors in the summer and the evaporator is placed indoors. Run the indoor heat delivered to the outdoors. In winter, the evaporator is placed outdoors and the condenser is placed indoors so that the outdoor heat is delivered to the interior. Of course, we do not disassemble equipment for the season, but through the physical conversion valve so that the evaporator and condenser transposed. Heat pump air conditioning inside a four-way valve. In cooling conditions, the indoor heat exchanger is the evaporator, and the outdoor heat exchanger (the one that calls out the hot air in the summer) is the condenser. In winter heating, the four-way valve to switch to change the flow of refrigerant, this time, the indoor heat exchanger is the condenser, outdoor heat exchanger (winter out of the cold wind that thing) is the evaporator. As the winter out of the cold, the heat exchanger to frost, so frost to a certain extent, the four-way valve to switch, air conditioning into the summer cooling conditions, outdoor heat exchanger to get the heat, defrost, defrost After the completion of the four-way valve and then switch to the heating state. In case of defrosting, the fan of the indoor unit is stopped to prevent cold air blowing into the room.
Flexible Flap Disc
Flexible Flap Disc is suitable for polishing of stainless
steel, metal, metallurgy, automobile, wood, marble and other industries. It is
especially suitable for the processing of stainless steel and can replace the
resin-shaped grinding wheel. It has strong elasticity, high tensile and bending
strength, good self-sharpening, high grinding rate, and low noise. It is
suitable for welding seams in the box. Polishing of the edges.
The related abrasive products we can supply is Flap Disc Adhesive , Bonded Abrasives , Flap Wheels , Abrasive Sanding Disc, and Abrasive Machine such as Flap Disc Making Machine,Abrasive Belt Making Machine, Flap Wheel Machine ,Sanding Disc Machine, if you have any needs about abrasive tools, please kindly feel free to contact us.
According to the type of abrasive
particles: ceramic alumina VS zirconium corundum VS alumina
According to the type of abrasive selected,
the flap disc can be divided into three types: ceramic alumina, zirconium
corundum and alumina.
Because ceramic alumina itself has many
crystals, it has good self-sharpening, relatively neat edges, good heat
dissipation, and long service life. Therefore, ceramic alumina louvers are
mainly used for the grinding of stainless steel, aluminum and other hard
metals.
Zirconium corundum itself is a
polycrystalline crystal, with fast cutting speed, good self-sharpening, and
strong resistance to high pressure and high temperature. Therefore, zirconium
corundum louver blades have strong cutting ability and long service life.
Alumina: single
crystal, the cutting ability begins to decline at the beginning of grinding,
and the abrasive grains are not easy to break, so the alumina flap disc is
suitable for the processing of common metals.
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