Cartridge for cleaning compressed air in compressed air supply systems of motor vehicles
AssigneeHaldex Brake Products AB
InventorSiegfried Heer
Life of this patent
Estimating the term…
Abstract
A cartridge of an air dryer serves for cleaning compressed air to be used in compressed air supply systems of motor vehicles, especially trucks. The cartridge includes a housing, a pre-filter, a deposit chamber, a coalescing filter, a bypass conduit and a check valve. The deposit chamber is located downstream of the pre-filter. The deposit chamber is filled with a treating substance. The coalescing filter is arranged between the pre-filter and the deposit chamber. The bypass conduit is designed and arranged to bypass the coalescing filter and not to bypass the pre-filter. The check valve is arranged in the bypass conduit in a way that it opens during regeneration of the cartridge.
Claims20
A cartridge for cleaning compressed air to be used in compressed air supply systems of motor vehicles, comprising:
- a housing;
- a pre-filter, said pre-filter being arranged in said housing;
- a deposit chamber, said deposit chamber being located downstream of said pre-filter, said deposit chamber being filled with a treating substance;
- a coalescing filter, said coalescing filter being arranged between said pre-filter and said deposit chamber;
- a bypass conduit, said bypass conduit being designed and arranged to bypass said coalescing filter and not to bypass said pre-filter;
- and
- a check valve, said check valve being arranged in said bypass conduit in a way that it opens during regeneration of said cartridge.
A method of cleaning compressed air to be used in a compressed air supply system of a motor vehicle, said method comprising the steps of:
- directing the compressed air containing impurities, water and oil though a pre-filter;
- removing larger particles of impurities and water from the compressed air in the pre-filter;
- directing the compressed air though a coalescing filter;
- collecting oil from the compressed air in the coalescing filter to form larger oil particles and removing the larger oil particles from the compressed air downstream of the coalescing filter;
- directing the compressed air though a deposit chamber, the deposit chamber being filled with a treating substance;
- removing water from the compressed air in the deposit chamber;
- and
- during regeneration transferring the larger oil particles located downstream of the coalescing filter into the atmosphere by a flow of regeneration air while bypassing the coalescing filter;
- and
- during regeneration transferring the larger particles of impurities and water located in the pre-filter into the atmosphere by a flow of regeneration air directed though the pre-filter.
Dependencies are inferred from the claim text.