Electrical fluid heater

An electrical fluid heater comprising:

• at least one heating element comprising:
• a tubular element, wherein lateral sides of the tubular element have curved profile;
• at least one core received inside the tubular element and formed with electrodes on at least one side of the core that extend out from both sides of the tubular element for enabling power supply through the heating element;
• electrically insulating and thermally conductive material layers disposed in an annular space between the electrodes and walls of the tubular element;
• at least one casing comprising:
• a first portion;
• and
• a second portion assembled to the first portion along an interface plane to define an enclosure for receiving the heating element therein;
• a partition groove formed thereon extending between a proximal end and a distal end of the casing to divide the casing into a first chamber for a first pass “A” and a second chamber for a second, return pass “B” for fluid flow;
• an inlet and an outlet, wherein the inlet supplies fluid to the first pass “A” and the outlet collects fluid from the second pass “B” after heat exchange with the heating element,
• wherein the casing is formed with an intermediate connecting portion adapted to define a U-turn trajectory “C” forming fluid communication between the first chamber and the second chamber along a plane of the heating element and extending in longitudinal direction along one of the lateral sides, and
• wherein at least a portion of the heating element is disposed in the first chamber of the casing, and a remaining portion of the heating element is disposed in the second chamber of the casing.