Patent ID: 6736329
Filing Date: 2004-05-18
Classification: F24H

Abstract:
A heating unit for heat-transfer fluid for a central heating installation comprising:a tubular external wall, a first end wall and a second end wall forming a substantially cylindrical space; a first tubular internal partition located substantially concentrically within the tubular external wall and forming a first annular space between the tubular external wall and the first internal partition; a second internal partition having a diameter smaller than the first internal partition located substantially concentrically within the first internal partition and forming a second annular space between the first internal partition and the second internal partition; a central pipe located inside the second internal partition, the second annular space being in communication with the central pipe adjacent to the first end wall and in communication with the first annular space adjacent to the second end wall; an inlet orifice opening out of the first annular space adjacent to the first end wall; an outlet orifice in the second end wall opening out from the central pipe; at least one electric immersion heater mounted in the central pipe; and at least one thermostatic sensor mounted inwardly of the tubular external wall.