Abstract: A movable fluid fuel heater to heat air and to introduce it into an environment to be heated. The heater includes a flow rate variator device for varying the flow rate of oxidizing air introduced in the combustion chamber by a forced ventilation device between a minimum flow rate value and a maximum flow rate value. The heater also includes a reference device comprising a plurality of reference values of a parameter representative of the pressure and a plurality of reference temperature values of the environmental air upstream of the combustion chamber. The reference device is configured to suggest an optimal setting value to set the flow rate variator device, at each pair of values formed by a value of the plurality of reference values of a parameter representative of the pressure and a value of the plurality of reference temperature values.

Abstract: A liquid fuel portable heater (100) comprises: a combustion chamber (101) having a fuel inlet with a nebuliser (13); an electric pump (10) having an inlet (11) for suctioning said liquid fuel from a tank (6), and an outlet (12) connected to said nebuliser (13); a control unit (20) configured so that, when the heater (100) is turned on, said control unit (20) supplies the electric pump with a sequence of pulses (115, 115?) with a non-zero voltage, and pause intervals (116) with a substantially zero voltage alternating with said pulses, wherein the average duration of the pulses (115, 115?) is less than the average duration of the pause intervals (116).

Abstract: A movable fluid fuel heater to heat air and to introduce it into an environment to be heated. The heater includes a flow rate variator device for varying the flow rate of oxidizing air introduced in the combustion chamber by a forced ventilation device between a minimum flow rate value and a maximum flow rate value. The heater also includes a reference device comprising a plurality of reference values of a parameter representative of the pressure and a plurality of reference temperature values of the environmental air upstream of the combustion chamber. The reference device is configured to suggest an optimal setting value to set the flow rate variator device, at each pair of values formed by a value of the plurality of reference values of a parameter representative of the pressure and a value of the plurality of reference temperature values.

Abstract: Disclosed a heating unit for a portable fuel heater for heating ambient air. In one exemplary embodiment, the heating unit comprises: a first side wall defining an inner space, said inner space forming a combustion chamber; a second side wall arranged outside around said first side wall, said first side wall and said second side wall defining a first annular gap therebetween, said first annular gap forming a cooling chamber adapted to be crossed by a cooling air flow to subtract heat from the first side wall and transfer it to an external environment to be heated; wherein said first side wall forms a first plurality of bosses adapted to promote a thermal exchange of said first side wall with the combustion chamber and with the cooling chamber.

Abstract: A movable fluid fuel heater to heat air and to introduce it into an environment to be heated. The heater includes a flow rate variator device for varying the flow rate of oxidizing air introduced in the combustion chamber by a forced ventilation device between a minimum flow rate value and a maximum flow rate value. The heater also includes a reference device comprising a plurality of reference values of a parameter representative of the pressure and a plurality of reference temperature values of the environmental air upstream of the combustion chamber. The reference device is configured to suggest an optimal setting value to set the flow rate variator device, at each pair of values formed by a value of the plurality of reference values of a parameter representative of the pressure and a value of the plurality of reference temperature values.

Abstract: A transportable combustion air heater comprises a transportable supporting frame, a housing fixed to the frame, a cylindrical combustion chamber arranged in housing, a cylindrical annular thermal exchange channel formed around the combustion chamber, an external heating chamber defining an annular fume channel around the thermal exchange channel, in which one or more transversal guide walls are arranged in the external heating chamber, which guide walls lengthen flow paths of the fumes in the annular fume channel from fume inlet openings to an exhaust fume opening.

Abstract: A portable fluid fuel air heater comprising a combustion chamber adapted to accommodate a combustion of a fluid fuel; a supply conduit for supplying said fluid fuel to the combustion chamber; at least one electrical device required for the operation of the heater mounted on board the heater; an outer surface of the heater comprising a cavity-like portion for receiving an electric battery in a removable manner up to an operative position of the battery in which the battery is adapted to electrically power the electrical device and is at least partially inserted into said cavity-like portion, said cavity-like portion being configured to keep the battery outside the outer surface of the heater in said operative position of the battery.

Abstract: A liquid fuel portable heater (100) comprises: a combustion chamber (101) having a fuel inlet with a nebuliser (13); an electric pump (10) having an inlet (11) for suctioning said liquid fuel from a tank (6), and an outlet (12) connected to said nebuliser (13); a control unit (20) configured so that, when the heater (100) is turned on, said control unit (20) supplies the electric pump with a sequence of pulses (115, 115?) with a non-zero voltage, and pause intervals (116) with a substantially zero voltage alternating with said pulses, wherein the average duration of the pulses (115, 115?) is less than the average duration of the pause intervals (116).

Abstract: A transportable combustion air heater comprises a transportable supporting frame, a housing fixed to the frame, a cylindrical combustion chamber arranged in housing, a cylindrical annular thermal exchange channel formed around the combustion chamber, an external heating chamber defining an annular fume channel around the thermal exchange channel, in which one or more transversal guide walls are arranged in the external heating chamber, which guide walls lengthen flow paths of the fumes in the annular fume channel from fume inlet openings to an exhaust fume opening.

Abstract: Disclosed a heating unit for a portable fuel heater for heating ambient air. In one exemplary embodiment, the heating unit comprises: a first side wall defining an inner space, said inner space forming a combustion chamber; a second side wall arranged outside around said first side wall, said first side wall and said second side wall defining a first annular gap therebetween, said first annular gap forming a cooling chamber adapted to be crossed by a cooling air flow to subtract heat from the first side wall and transfer it to an external environment to be heated; wherein said first side wall forms a first plurality of bosses adapted to promote a thermal exchange of said first side wall with the combustion chamber and with the cooling chamber.

Abstract: A movable fluid fuel heater to heat air and to introduce it into an environment to be heated. The heater includes a flow rate variator device for varying the flow rate of oxidizing air introduced in the combustion chamber by a forced ventilation device between a minimum flow rate value and a maximum flow rate value. The heater also includes a reference device comprising a plurality of reference values of a parameter representative of the pressure and a plurality of reference temperature values of the environmental air upstream of the combustion chamber. The reference device is configured to suggest an optimal setting value to set the flow rate variator device, at each pair of values formed by a value of the plurality of reference values of a parameter representative of the pressure and a value of the plurality of reference temperature values.