Continuous frying device

A continuous frying device for carrying out a frying process for food products comprising:

• a frying oil reservoir to be filled with a nominal volume of frying oil;
• a food product carrier which is at least partially immersible in the frying oil in the frying oil reservoir;
• at least one heating unit for heating the frying oil in the frying oil reservoir during the frying process;
• an oil circulation pump for circulating the frying oil from a supply side of the frying oil reservoir to an opposite distal suction end of the frying oil reservoir;
• a first filter at the suction end in the frying oil reservoir and arranged to filter particles from the circulating frying oil,
• wherein the oil circulation pump comprises a suction box downstream behind the first filter and is configured to, in operation, pump the frying oil from the frying oil reservoir downstream the first filter, through an external filter chain, back into the frying oil reservoir at the supply side of the frying oil reservoir,
• wherein the external filter chain comprises an oil-particle separator and a subsequent continuous non-batchwise filter system, the oil-particle separator configured to take in a flow of particle polluted oil from the frying oil reservoir and separate the flow of particle polluted oil into a first clean flow of oil and a second polluted flow of oil;
• and
• wherein the external filter chain is configured so that the first clean flow of oil is fed from the oil-particle separator to the supply side of the frying oil reservoir, and the second polluted flow of oil to the continuous non-batchwise filter system that is configured to filter particles from the second polluted flow of oil onto a filter substrate while passing through a second clean flow of oil which second clean flow of oil is fed to from the continuous non-batchwise filter to the supply side of the frying oil reservoir, and
• wherein the oil circulation pump, the first filter, and the external filter chain in combination are configured such that in operation a volume of at least three times the nominal volume of frying oil contained in the frying oil reservoir passes through the external filter chain per hour.