Burner assembly for a mobile heater and insert component with retaining ring for an evaporator

Abstract

A burner assembly (1) for a mobile fuel-operated heater, in particular for a vehicle, comprises an evaporator (20) configured to evaporate a fuel supplied to it, an evaporator receptacle (24) designed to receive the evaporator (20), a peripheral wall (16) defining a combustion chamber (14) in which a gas mixture containing the evaporated fuel can be combusted, wherein the peripheral wall (16) defines a central axis (M), a glow plug (10) with a shaft section (12) comprising a glow element, which is configured to convert a current flowing through it when a voltage is applied into heat for igniting the gas mixture, and a first opening (15) formed in the peripheral wall (16) of the combustion chamber (14) and through which the shaft section (12) of the glow plug (10) extends substantially radially into the combustion chamber (14).A mounting arrangement (44, 45, 46, 17, 8) for the glow plug (10) is configured to allow the shaft portion (12) of the glow plug (10) to pivot within the combustion chamber (14) in a direction (R) along the center axis (M) away from the evaporator (20). A corresponding insert component with an integrally formed retaining ring for the evaporator is also provided.

Claims

[1] Burner assembly (1) for a mobile fuel-operated heater, in particular for a vehicle, comprising: - an evaporator (20) arranged to evaporate a fuel supplied to it; - an evaporator holder (24) designed to receive the evaporator (20); - a peripheral wall (16) defining a combustion chamber (14) in which a gas mixture containing the vaporized fuel can be burned, the peripheral wall (16) defining a central axis (M); - a glow plug (10) with a shaft section (12) having a glow element, which is designed to convert a current flowing through it when a voltage is applied into heat for igniting the gas mixture; - a first opening (15) formed in the peripheral wall (16) of the combustion chamber (14) and through which the shaft portion (12) of the glow plug (10) extends substantially radially into the combustion chamber (14); characterized by - a mounting arrangement (44, 45, 46, 17, 8) for the glow plug (10), which is designed to allow pivotability of the shaft section (12) of the glow plug (10) within the combustion chamber (14) in a direction (R) along the center axis (M) away from the evaporator (20). [2] Burner assembly (1) according to claim 1, wherein the mounting arrangement comprises a spring element (8) which is operatively connected to the glow plug and is configured to apply a spring force (Fs) to the glow plug (10) which presses the shaft portion (12), preferably in the direction (R) towards the evaporator (20). [3] Burner assembly (1) according to claim 2, wherein the mounting arrangement comprises a holding element (44) which is fixedly positioned with respect to the evaporator receptacle (24) and / or the peripheral wall (16), wherein the holding element (44) comprises a second opening (45) which is located opposite the first opening (15) outside the combustion chamber (14) in an at least partially overlapping manner, wherein the shaft section (12) of the glow plug (10) extends through the second opening (45). [4] Burner assembly (1) according to claim 3, wherein a length of the second opening (45) parallel to the center axis (M) is greater than a length of the first opening (15) parallel to the center axis (M). [5] Burner assembly (1) according to one of claims 3 or 4, wherein the shaft portion (12) of the glow plug (10) has a cross-sectional profile, wherein the second opening (45) has an opening area which is larger than the cross-sectional profile. [6] Burner assembly (1) according to one of claims 3 to 5, wherein the first opening (15) has a first contact surface (151) and the second opening (45) has a second contact surface (451), wherein the first contact surface (151) and the second contact surface (451) delimit the respective openings (15, 45) on the side facing away from the evaporator (20), wherein the spring element (8) is designed to exert the spring force (Fs) on the shaft section (12) of the glow plug (10) and thereby press it against both contact surfaces (151, 451). [7] Burner assembly (1) according to claim 6, wherein a position of the second contact surface (451) projected onto the center axis (M) further from the evaporator (20) coincides with a position of the first contact surface (151) projected onto the center axis (M). [8] Burner assembly (1) according to one of claims 3 to 7, wherein the holding element (44) is formed integrally with a holding ring (40) which is adapted to hold and press the evaporator (20) in the evaporator receptacle (20). [9] Burner assembly (1) according to claim 8, wherein the retaining ring (40) further comprises a circumferential flange portion (41) which is received between a burner flange (17) formed integrally with the peripheral wall (16) and an evaporator receiving flange (26) and is preferably welded thereto. [10] Burner assembly (1) according to claim 8 or 9, wherein the retaining ring (40) further comprises a cylindrical portion (47) and a holding portion (49) adjoining the cylindrical portion (47) and the holding portion (49) together form a pot shape, the evaporator receptacle (24) opposite receives the evaporator (20) and presses it. [11] Burner assembly (1) according to claim 10, wherein the inner opening (48) is closed by a grid (50) through which the vaporized fuel can pass. [12] Fuel-operated mobile heater, in particular for a vehicle, comprising a burner assembly according to one of the preceding claims. [13] Insert component (400) for a burner assembly (1) for a mobile fuel-fired heater, comprising: - a retaining ring (40) for an evaporator (20) with a holding section (49) for pressing the evaporator (20) into an evaporator receptacle (24) of the burner assembly (1), with an inner opening (48) for releasing a fuel evaporated by the evaporator (20) into a combustion chamber (14) of the burner assembly (1), and with a flange section (41) for fastening the retaining ring (40) to a burner flange (17) formed integrally with a peripheral wall (44) of the combustion chamber (14) and to an evaporator receptacle flange (26); and - a holding element (44) for holding a glow plug (10) outside and for determining an orientation of a shaft section (12) of the glow plug (10) within the combustion chamber (14). [14] The insert component (400) according to claim 13, wherein the retaining ring (40) further has a cylindrical portion (47) extending in an axial direction between the holding portion (49) and the flange portion (41).

Images