公开(公告)号：US20240110726A1

公开(公告)日：2024-04-04

申请号：US17957586

申请日：2022-09-30

Applicant: Nilfisk A/S

Inventor： Hans Jørgen Bank Olesen ,  Leif Nørgaard Christensen

IPC: F24H9/1832 ,  F24H9/02

CPC classification number: F24H9/1832 ,  F24H9/02

Abstract: A heating unit for heating a fluid includes a tank, a burner element, and a lower unit. The tank defines top and bottom ends and includes an outer wrap, an inner wrap, and a cooling chamber. The outer wrap extends along an axial centerline defined by the tank. The inner wrap is disposed within the outer wrap. The cooling chamber is defined in-part by and is disposed between the inner and outer wraps along a radial direction of the tank. The burner element is disposed on the top end of the tank. The blower unit is disposed on the bottom end of the tank and is in fluid communication with the burner element via the cooling chamber. An outlet of the blower unit is disposed along the axial centerline of the tank.