Flow guiding insert, fixing element, flow guiding system and heater

Abstract

The present invention relates to a flow guide insert (28, 130, 131, 132, 133, 134, 135, 136) for a heating device (2) having an evaporator burner (4), wherein the evaporator burner (4) has a blower chamber or combustion air front chamber (20), an evaporator receiving section (10), and a combustion chamber (8), wherein the evaporator receiving section (10) has a bottom wall (26) and a peripheral wall (30) having at least two combustion air through openings (22) to allow combustion air to pass from the blower chamber or combustion air front chamber (20) first along the outside of the evaporator receiving section (10) through the peripheral wall (26). The combustion air through opening (22) of the evaporator burner (30) is guided into the combustion chamber (8), wherein the flow guiding inserts (28, 130, 131, 132, 133, 134, 135, 136) include at least one first region (28a, 130a, 131a, 132a, 133a, 134a, 135a, 136a) for covering at least one of the combustion air through openings (22), and the flow guiding inserts include a second region (28b) for fixing in the blower chamber or combustion air front chamber (20) of the evaporator burner (4), wherein the first region is tongue-shaped. Furthermore, the present invention relates to a fixing element having a flow guiding element, a flow guiding system, and a heating device.

Description

Technical Field

[0001] The present invention relates to a flow guide insert, a fixing element, a flow guide system, and a heating device, particularly a mobile heating device for vehicles. Background Technology

[0002] Heating devices with evaporator burners are used in auxiliary and / or supplementary heating devices operating on liquid fuels, particularly in vehicles. Figure 1 The diagram shows a heating device with an evaporator burner according to the prior art as per DE 10 2012 100 173 B4. The heating device 2 is designed as a mobile, fuel-driven auxiliary heating device for engine-operated land vehicles. The evaporator burner 4 itself also has a combustion chamber 8, an evaporator receiving section 10, and an evaporator element 12 for evaporating liquid fuel. The combustion chamber 8, the evaporator receiving section 10, and the evaporator element 12 are designed substantially rotationally symmetrically. The combustion chamber 8 is circumferentially bounded by a surrounding combustion chamber wall 14. In the region of the fuel supply device, at the end side, the combustion chamber 8 is bounded by the evaporator receiving section 10, which is supplied via a fuel supply pipe 36 and a combustion air inlet 24. In the evaporator receiving section 10, the evaporator element 12 is received on the side facing the combustion chamber 8. The evaporator burner 4 also has a combustion air guiding element 16 on the side of the evaporator receiving section 10 opposite to the combustion chamber 8. The combustion air guiding element 16 is constructed in a bowl shape and is fitted onto the evaporator receiving section 10 in a cap-like manner.

[0003] The combustion air front chamber 20 is annularly constructed around the combustion chamber 8. A gap 18 between the bottom wall 26 and the evaporator receiving section 10 leads into the combustion air front chamber 20. A fluid connection is established between the combustion air front chamber 20 and the combustion chamber 8 via a combustion air through-hole 22 constructed in the combustion chamber wall 14. The gap 18 between the bottom wall 26 of the evaporator receiving section 10 and the combustion air guiding element 16 extends continuously across the entire surface of the bottom wall 26 (except for the area of ​​the combustion air inlet 24), thereby cooling the bottom wall 26 substantially across its entire surface (except for the central region).

[0004] Fuel supply pipe 36 is arranged inside the sleeve-shaped combustion air inlet 24, so that the fuel supply pipe is surrounded and cooled by combustion air during use to prevent premature evaporation and ignition of fuel directly into the evaporator element 12, which could lead to combustion pulses. A first flow path 42 for exhaust gas is formed in the heat exchanger 6. Exhaust gas flows along the first flow path 42 inside the heat exchanger 6 to the exhaust gas outlet pipe 44, through which the exhaust gas is directed outward. In addition, a second flow path 46 is provided inside the heat exchanger 6, in which the vehicle's cooling fluid is directed. The first flow path 42 and the second flow path 46 are arranged here to efficiently transfer heat from the exhaust gas to the cooling fluid during use.

[0005] For assembly purposes, the bell-shaped combustion air guide element 16 must be interrupted at at least one point. This interruption can be used to arrange the fuel supply pipe 16 or the burner's ignition rod.

[0006] In such an evaporator burner, a turbulent flame exists during burner switching. This flame has a noise spectrum in the 100Hz to 1000Hz range for hydrocarbon-based fuels. Here, the volume or amplitude depends particularly on the combustion power, the local air coefficient, and turbulent mixing. Furthermore, in the heating system, the geometry of the combustion chamber, heat transfer element, and burner fore-chamber can enhance or reduce sound transmission according to frequency. Fluctuations in the mass flow of air delivered by the combustion air blower manifest as fluctuations in the air coefficient.

[0007] At specific frequencies, a feedback mechanism may occur, in which the sound generated by the flame re-interacts with the flame, directly or indirectly, with a specific time delay, and is amplified by the combustion reaction. This is combustion instability. Through this process, specific frequencies are amplified to a sound pressure level that is strongly increased relative to the broadband background noise, which is perceived as uncomfortable operating noise in heating appliances.

[0008] To avoid such disruptive operating noise, the geometry of relevant parts of the burner, or even the entire burner, must be modified according to existing technology, or the burner must be operated within a different power range or under a different air coefficient. These problems are often only discovered late in the burner's development, resulting in high costs for eliminating them. Furthermore, the aforementioned changes also affect the combustion process, emissions, performance, etc., thus usually requiring compromises.

[0009] Furthermore, it is desirable that the heating appliances be modularly constructed to meet different requirements, such as regarding exhaust emissions and operating conditions, allowing for the combination of different components. This involves burners or blowers, but also modifications to catalytic converters, as known, for example, from EP 3 348 905 A1. Summary of the Invention

[0010] The objective of this invention is to provide the possibility of optimizing the noise spectrum of a heating device in the later stages of development. In particular, the objective of this invention is to provide a flow guide insert, a fixing element for a flow guide element, an improved flow guide system, and an improved heating device, especially a mobile heating device for a vehicle.

[0011] The objective of this invention is achieved through the features of claim 1 in terms of the flow guiding insertion element, through the features of the technical solution of this invention in terms of the fixing element, through the features of the technical solution of this invention in terms of the flow guiding system, and through the features of the technical solution of this invention in terms of the heating device. Suitable configurations are derived from the corresponding dependent claims.

[0012] The flow guide insert according to the invention is configured for insertion into a heating device having an evaporator burner.

[0013] The evaporator burner has a blower chamber or combustion air inlet chamber, an evaporator receiving section, and a combustion chamber. The evaporator receiving section has a bottom wall and a peripheral wall, the peripheral wall having at least two combustion air through openings. The blower chamber or combustion air inlet chamber is at least partially defined outwards by the wall and downwards by the bottom of the blower chamber or combustion air inlet chamber. The evaporator receiving section is first introduced into the blower chamber or combustion air inlet chamber via the bottom wall, thereby partially closing the blower chamber or combustion air inlet chamber upwards. Combustion air from the blower chamber or combustion air inlet chamber is first guided along the outside of the evaporator receiving section through the combustion air through openings in the peripheral wall into the combustion chamber.

[0014] The flow guide insert includes at least one first region for covering at least one of the combustion air through openings, and includes a second region for fixing in the blower chamber or combustion air front chamber of the evaporator burner, wherein the first region is tongue-shaped. The flow guide insert is configured to be disposed on the outside of the evaporator receiving section.

[0015] The flow guide insert, or bushing configuration, is designed to be positioned within the blower chamber or combustion air pre-chamber of the evaporator burner when needed, and extends substantially parallel to the peripheral wall of the evaporator receiver in its first region (at least partially). "Substantially parallel" should be understood herein as parallel or deviating from it by a maximum of 10°. This includes the flow guide insert following the curved profile of the peripheral wall of the evaporator receiver. The extension of the first region particularly follows the main flow direction of the combustion air along the evaporator receiver, which in particular has a peripheral wall that is rotationally symmetrical about a longitudinal axis. The first region preferably also extends along this longitudinal axis. In particular, the flow guide insert has a curved portion between the first and second regions, such that the second region extends at least partially along the bottom wall of the evaporator receiver.

[0016] Pressure fluctuations are reduced by using a flow guide insert. Specifically, the amplitude of pressure fluctuations generated in the evaporator burner flame and radiating towards the blower is reduced. The distance between the flow guide insert and the peripheral wall is chosen such that the combustion air supply through the orifice is not throttled, or at least not significantly throttled. For this purpose, the distance s between the peripheral walls should be chosen such that the combustion air supply passes through the input surface A of the opening. l Minimum corresponding to the circumferential surface A available for combustion air inflow r Therefore, the spacing s should not be less than one-quarter of the hole diameter.

[0017] Here, the flow guide insert according to the invention can cover one or more combustion air through openings. The flow guide insert of the invention allows for optimization of the noise spectrum later in the development of the evaporator burner or heating device. Therefore, a modular structure is possible, as the various developed components can thus be coordinated with each other afterward.

[0018] In particular, flow guide inserts can be used in areas where, for example, the spacing between the blower housing wall and the peripheral wall is increased due to the insert.

[0019] In one configuration, the second region is designed for fixation to the evaporator receiving section in a region of the bottom wall of the evaporator receiving section. For this purpose, the second region may have a fixing area, which, for example, has one or more through holes or clamping devices. In particular, the second region may be configured for force-locking or form-locking connection with the evaporator receiving section or with components arranged and fixed in the blower chamber. Alternatively or additionally, the second region may include support elements for support against the blower housing.

[0020] The flow guide insert is suitably made of sheet metal, especially integrally. This can particularly apply to curved components.

[0021] In another configuration, the first region has a protrusion or arch, which is arranged in the region of the combustion air passage to be covered or behind the combustion air passage to be covered in the flow direction, for support against the peripheral wall. This protrusion or arch is oriented towards the peripheral wall. Here, the arch can be achieved by external pressing. The protrusion for support against the peripheral wall ensures a minimum clearance between the peripheral wall and the flow guide insert without obstructing air guidance.

[0022] In another configuration, multiple first regions are connected to each other by a common second region, wherein the first regions protrude tongue-shaped from the second regions.

[0023] The fixing element for flow guiding elements according to the invention is designed for insertion into the blower chamber or combustion air front chamber of an evaporator burner, wherein the fixing element includes at least one flow guiding insert as described above. This flow guiding insert has a body and a flow-through opening to uniformly distribute air from the blower to the combustion air flow-through opening. The fixing element may in particular have a planar region, which is a second region for one or more flow guiding inserts and protrudes tongue-shaped from the first region. One or more first regions extend from the planar region, particularly in the radial and / or vertical directions.

[0024] In one configuration, the fixing element includes 1 to 20 flow guide placements, particularly 2 to 10 flow guide placements.

[0025] Using a fixing element, a flow guiding element can be easily secured in a heating device, particularly a blower chamber or combustion chamber. In a first configuration, the fixing element is adapted to be tensioned against the wall of the blower chamber or combustion chamber, particularly the blower housing, so as to securely and fix the flow guiding element in place. For this purpose, the fixing element may have a protrusion that engages in a recess in the wall or rests on a smooth wall. Alternatively or additionally, the fixing element is adapted to tension the flow guiding element such that the flow guiding element itself is tensioned against the blower chamber or combustion chamber.

[0026] In one configuration, the stationary element is a spring-loaded element, preferably an integral spring-loaded element made of spring steel. In another configuration, the spring-loaded element is at least partially formed of plastic, spring steel and plastic, or only plastic. This spring-loaded element may have, in particular, two, three, four or more protrusions toward the blower housing and the same number of tongues pointing inward toward the outflow area of ​​the flow guide element. In one configuration, the spring-loaded element does not have a closed shape in the circumferential direction, but has an opening that can be used to bring the stationary element into position by means of deformation. This opening is particularly aligned with the clearance of the flow guide element. The flow guide element has, in particular, a recess on its upper side, into which the stationary element is placed, and the recess is designed, particularly for the tongues and / or protrusions, such that the flow guide element and the stationary element mate with each other in exactly one orientation. Furthermore, the stationary element, especially the spring-loaded element, and especially the tongues of the spring-loaded element, may be designed to contact the evaporator receiving section or evaporator holding section, especially the bottom protrusions of the evaporator receiving section or evaporator holding section, in the installed state. The elastic element can be effectively tensioned by pressing the bottom protrusion against the tongue.

[0027] The flow guiding system for heating devices, especially heating devices with evaporator burners, according to the invention comprises a flow guiding element and a fixing element according to the invention.

[0028] A flow guiding element for a heating device, particularly a heating device with an evaporator burner, comprises a body having an inflow region laterally arranged on its lower side, an outflow region centrally arranged, and at least one guide element. The outflow region includes a through-hole extending from the lower side of the flow guiding element to an upper side opposite to the lower side of the flow guiding element. The guide element is arranged to guide the flow from the inflow region to the outflow region. The flow guiding element has a recess on its upper side, opposite to one or more guide elements, for inserting a fixing element for securing it in the blower chamber of the evaporator burner.

[0029] The lower and upper sides of the flow guiding element are opposite sides of the flow guiding element. Here, the lower side is suitably configured with a support surface, and the upper side is designed to be oriented toward the evaporator receiving section when the heating device is installed. Especially when viewed in projection on the upper side of the flow guiding element, the external shape matches the shape of the heating device that receives the air, particularly the combustion air front chamber. The flow guiding element according to the invention is particularly suitable for heating devices having a blower arranged off-center, i.e., eccentrically. Therefore, the flow guiding element guides the airflow from the blower to the central outlet area in a simple and cost-effective manner.

[0030] The flow guiding element can be suitably formed by a protrusion or wall arranged on the lower side of the flow guiding element, thereby forming a channel on the flow guiding element that opens downward.

[0031] Alternatively, flow guiding elements can also be formed through closed channels.

[0032] Suitablely, the flow guiding element is a plastic molded part, especially a plastic injection molded part. Such a plastic molded part can be manufactured cost-effectively and simplifies assembly. For example, polyphenylene sulfide (PPS) or glass fiber reinforced PPS, especially PPS GF 40, can be considered as the plastic. In another configuration, the flow guiding element is formed at least partially or solely of a metallic material, or of a metallic material and one of the aforementioned plastics.

[0033] In one configuration, the flow guiding element has a space for inserting an ignition rod, which is particularly arranged on the side of the flow guiding element opposite to the inflow area, especially on the upper side.

[0034] In another configuration, the inflow area is designed to receive the blower, wherein the inflow area is specifically constructed as an arch. The arch arches upward toward the flow guiding element. The lower side of the arch is open. In another configuration, the inflow area, particularly the inflow area configured as an arch, has a secondary outflow opening. In particular, the secondary outflow opening is constructed and arranged such that it forms a through-hole through the wall of the arch and guides a portion of the airflow for cooling the ignition rod, while the main portion of the airflow is further guided from the inflow area to the outflow area.

[0035] One or more guide elements are suitably configured to fan out the airflow from the inflow area to the outflow area, and / or divide the airflow from the inflow area to the outflow area, guiding a first portion to the outflow area and guiding another portion further around the outflow area in a circumferential direction, and then guiding it radially inward to the outflow area at one or more openings. A targeted flow profile can be created by the one or more guide elements. To guide a portion of the airflow in a circumferential direction, a surrounding wall with one or more perforations can be provided on the outflow area.

[0036] The heating device according to the invention, having an evaporator burner and a blower chamber, has a flow guiding insert according to the invention. Alternatively or additionally, the heating device according to the invention has an eccentric blower and includes a flow guiding system according to the invention.

[0037] The flow guiding element can be self-aligned and received in the blower chamber.

[0038] The flow guide insert is suitably and detachably connected to the heating device. Attached Figure Description

[0039] Other features and advantages of the invention will now be described in detail with reference to the accompanying drawings and the description of embodiments. These are illustrated in the schematic diagrams:

[0040] Figure 1 Heating devices based on existing technology;

[0041] Figure 2a -c View of an open heating device, flow guiding elements, and fixed elements without flow guiding inserts;

[0042] Figure 3a -c Configuration of the flow-guided implant;

[0043] Figure 4a -b is a view showing the configuration of a fixing element with a flow-guided insertion component, and

[0044] Figure 5a -c system configuration. Detailed Implementation

[0045] Figure 2a A view of an open heating device is shown, which has a flow guiding element 100 inserted into a combustion air front chamber 20 and a fixing element 120 without the flow guiding element. The lower side of the flow guiding element 100 is located above the bottom of the combustion air front chamber 20. The fixing element 120 is arranged above the flow guiding element 100. Therefore, the fixing element 120 is arranged toward an evaporator receiving portion or evaporator holding portion (not shown). The tongue 122 of the fixing element 120 is specifically designed to contact the dome or bottom protrusion of the evaporator receiving portion or evaporator holding portion in the installed state. By pressing the bottom protrusion of the evaporator receiving portion or evaporator holding portion onto the tongue 122, the fixing element 120, configured as a spring element, can be advantageously tensioned. Therefore, the flow guiding element 100 is held in the desired position by means of the fixing element 120.

[0046] Figure 2b A flow guiding element is shown. This flow guiding element 100 has an outer frame that matches a receiving area in the combustion air pre-chamber. The flow guiding element 100 has an inflow area 102 in the outer region that coordinates with the position of a blower. This blower relates to an eccentrically arranged blower.

[0047] Furthermore, the flow guiding element 100 has a central outflow region 104 that allows air to pass from the lower side to the upper side of the flow guiding element 100. Guide elements 106 are arranged on the lower side of the flow guiding element 100. Openings 110 are arranged between or beside one or more guide elements 106, allowing air to flow into the outflow region 104. The guide elements 106 in the lower region can be configured differently. The flow guiding element 100 can, for example, be a molded plastic part.

[0048] The flow guiding element 100 has an opening 108 for receiving the ignition rod. Furthermore, in Figure 2b The upper side shown in the diagram illustrates a first recess 112 and a second recess 114. The first recess has... Figure 2c The peripheral shape of the fixing element 120 is shown. The fixing element 120 can be inserted into the first recess 112 and the second recess 114. The fixing element 120 allows for the simple fixation of the flow guiding element in a heating device, particularly a blower chamber or combustion chamber. The fixing element 120 has three radially outwardly extending protrusions. The second recess 114 is designed for three inwardly pointing tongues 122 of the fixing element 120. The fixing element 120 does not have a closed shape in the circumferential direction, but has an opening that can be used to bring the fixing element 120 into position by means of deformation. This opening is designed to be aligned with the clearance 108 of the flow guiding element 100. The fixing element here is not only suitable for tensioning the flow guiding element 100, but also for supporting the blower chamber 20 wall with two protrusions. The fixing element 120 is preferably a spring element, which can be made of, for example, spring steel.

[0049] Figure 3a A first configuration of the flow guide insert 28 is shown. The flow guide insert 28 is externally fixed to the underside of the evaporator receiving section 10 of the evaporator burner 4. The evaporator receiving section 10 has a bottom wall 26 with a supply pipe 36. Furthermore, the evaporator receiving section 10 has a peripheral wall 30, which is at least partially conical or cylindrical, i.e., rotationally symmetrical about a longitudinal axis. Two combustion air passage openings 22 are arranged in the peripheral wall 30. The flow guide insert 28 has a first region 28a and a second region 28b. The first region 28a extends along the peripheral wall 30 and covers the combustion air passage openings 22. The first region 28a and the peripheral wall 30 are partially substantially parallel. Furthermore, an evaporator element 12 is received in the evaporator receiving section 10. The second region 28b extends substantially parallel to the bottom wall 26. In the example shown, the second region is fixed to the bottom wall 26.

[0050] Figure 3bAnother configuration of the flow guide insert 28 is shown. Furthermore, this configuration shows a blower housing 32 having a blower chamber or combustion air pre-chamber 20. The difference in the shown configuration is that the second region 28b of the flow guide insert 28 is not fixed to the evaporator receiving section 10, but instead includes a support element 28c. The flow guide insert 28 is supported against the blower housing 32 or located within the blower chamber by the support element 28c.

[0051] Figure 3c A flow guide insert 28 is shown located between the blower housing 32 and the evaporator receiving section 10. The flow guide insert 28 has a first region 28a and a second region 28b. The first region 28a has a distance s from the peripheral wall 30 of the evaporator receiving section 10. This distance does not change significantly between the positions indicated by s and t. The combustion air passage opening 22 of the peripheral wall 30 has a diameter d. l The input surface of the combustion air through opening 22 therefore has an area of:

[0052]

[0053] For the inflow of combustion air, a circumferential surface A with height s can be used. r :

[0054] A r =d l πs

[0055] The spacing s between the peripheral walls should be selected such that the opening A of the combustion air supply passage is... l The minimum input surface corresponds to the circumferential surface A available for combustion air inflow. r Therefore, the spacing s should not be less than one-quarter of the hole diameter.

[0056] Figures 4a to 4b A view of a fixed element 120 in one configuration is shown. (As...) Figure 2cThe fixing element 120 has three inwardly pointing tongues 122 and a central opening 124. Through holes 123 are also arranged in the plate area, which serve as positioning aids. These are optional. Furthermore, the surface region 121 of the fixing element 120 is a second region 28b of one or more flow-guiding inserts. In the illustrated example, the fixing element 120 includes seven flow-guiding inserts 130, 131, 132, 133, 134, 135, and 136. Each of these flow-guiding inserts 130, 131, 132, 133, 134, 135, and 136 includes tongue-shaped segments 130a, 131a, 132a, 133a, 134a, 135a, and 136af, and a corresponding first region of the flow-guiding insert, which extends almost perpendicularly to the surface region 121 and the common second region 28b. The tongue-shaped sections 130a, 131a, 132a, 133a, 134a, 135a, and 136a may optionally have narrower curved regions 130b, 131b, 132b, 133b, 134b, 135b, and 136b at the transition between the respective first and second regions. Furthermore, the tongue-shaped sections 130a, 131a, 132a, 133a, 134a, 135a, and 136a respectively have arched portions 130c, 131c, 132c, 133c, 134c, 135c, and 136c, which arch towards the center, i.e., towards the evaporator burner to be inserted. The arched portions 130c, 131c, 132c, 133c, 134c, 135c, and 136c ensure a minimum distance from the peripheral wall 30 (not shown) of the centrally placed evaporator receiving portion in the illustrated case. Configurations with more or fewer flow guide inserts are similarly possible.

[0057] Figure 5a -c shows a view of a flow guiding system, which includes a fixing element 120 as shown in Figure 4 and as shown in... Figure 2b The flow guiding element 100 is shown in the figure. Here, the flow guiding element 100 is in Figure 5a In the embodiment shown in -c, an optional secondary outflow opening 116 is provided in the region of the inflow region 102, which is configured as an arched portion. The outflow region 104 is essentially configured as a central through-hole in the flow guiding element 100 and is arranged aligned with the central opening 124 of the fixing element 120, while the secondary outflow opening 116 is arranged eccentrically. The flow through the outflow region 104 is directed towards and along the bottom wall 26 of the evaporator receiving section 10. The airflow through the secondary outflow opening 116 can be used to cool the ignition rod arranged in the recess 108.

[0058] List of reference numerals 2 Heating device

[0059] 4 Evaporator Combustion Chamber

[0060] 8 Combustion Chambers

[0061] 10 Evaporator Receiving Section

[0062] 12 Evaporator Components

[0063] 14. Burner wall

[0064] 16 Combustion air guiding element

[0065] 18 gaps

[0066] 20 Combustion air pre-chamber

[0067] 22 Combustion air through opening

[0068] 24 Combustion Air Inlet

[0069] 26 bottom wall

[0070] 28. Flow guide plate insert

[0071] 28a First Region

[0072] 28b Second Region

[0073] 28c Support element

[0074] 30th week wall

[0075] 32 Blower housing

[0076] 36 Supply pipe

[0077] 42 First Flow Path

[0078] 44 Exhaust gas discharge pipeline

[0079] 46 Second Flow Path

[0080] 100 Flow guiding elements

[0081] 102 Inflow Area

[0082] 104 Export Area

[0083] 106 Guide elements

[0084] 108 (Leave blank)

[0085] 110 Opening

[0086] 112 First Depression

[0087] 114 Second Depression

[0088] 116 Sub-outlet opening

[0089] 120 Fixed Components

[0090] 121. Surface area of ​​fixed element

[0091] 122 Tongue slices

[0092] 123 Through Hole AF|

[0093] 124 Central opening

[0094] 130…136 Flow-guided implant

[0095] 130a…136a First Region

[0096] 130b…136b Curved area

[0097] 130c…136c Arched section

[0098] t Spacing

[0099] s spacing

[0100] Area A

[0101] d Diameter

Claims

1. A flow guide insert (28, 130, 131, 132, 133, 134, 135, 136) for a heating device (2) having an evaporator burner (4), in, The evaporator burner (4) has a blower chamber or combustion air front chamber (20), an evaporator receiving section (10), and a combustion chamber (8), wherein the evaporator receiving section (10) has a bottom wall (26) and a peripheral wall (30) with at least two combustion air through openings (22) to guide combustion air from the blower chamber or combustion air front chamber (20) first along the outside of the evaporator receiving section (10) through the combustion air through openings (22) of the peripheral wall (30) into the combustion chamber (8). The flow guide inserts (28, 130, 131, 132, 133, 134, 135, 136) include at least one first region (28a, 130a, 131a, 132a, 133a, 134a, 135a, 136a) for covering at least one of the combustion air through openings (22), and the flow guide inserts include a second region (28b) for fixing in the blower chamber or combustion air front chamber (20) of the evaporator burner (4), wherein the first region is tongue-shaped.

2. The flow-guiding implant (28, 130, 131, 132, 133, 134, 135, 136) according to claim 1, in, The second region (28b) is designed for fixing to the evaporator receiving section (10) in the region of the bottom wall (26) of the evaporator receiving section (10), or The second region (28b) includes a support element (28c) for supporting against the blower housing (32).

3. The flow-guiding implant (28, 130, 131, 132, 133, 134, 135, 136) according to claim 1 or 2, in, The flow guide implants (28, 130, 131, 132, 133, 134, 135, 136) are made of sheet metal.

4. The flow-guiding implant (28, 130, 131, 132, 133, 134, 135, 136) according to claim 1 or 2, in, The first region (28a, 130a, 131a, 132a, 133a, 134a, 135a, 136a) has protrusions or arches (130c, 131c, 132c, 133c, 134c, 135c, 136c) arranged in the region of the combustion air passage opening (22) to be covered or arranged in the flow direction behind the combustion air passage opening (22) to be covered, for support against the peripheral wall (30).

5. The flow-guiding implant (28, 130, 131, 132, 133, 134, 135, 136) according to claim 1 or 2, in, Multiple first regions (130a, 131a, 132a, 133a, 134a, 135a, 136a) are connected to each other by a common second region (28b), wherein the first regions (130a, 131a, 132a, 133a, 134a, 135a, 136a) protrude from the second region in a tongue-like shape.

6. The flow-guiding implant (28, 130, 131, 132, 133, 134, 135, 136) according to claim 3, in, The flow guide implants (28, 130, 131, 132, 133, 134, 135, 136) are integrally manufactured.

7. A fixing element (120) for a flow guiding element (100), said fixing element being configured for insertion into the blower chamber or combustion air pre-chamber (20) of an evaporator burner (4), in, The fixing element (120) includes at least one flow guide placement element (28, 130, 131, 132, 133, 134, 135, 136) according to any one of claims 1 to 5.

8. The fixing element (120) according to claim 7, wherein the fixing element is configured as a spring-loaded element.

9. A flow guiding system for a heating device (2), comprising a fixing element according to claim 7 or 8 and a flow guiding element (100), in, The flow guiding element (100) has a body having an inflow region (102) arranged laterally on the lower side of the flow guiding element (100), an outflow region (104) arranged centrally, and at least one guide element (106). The outflow region includes a through-hole from the lower side of the flow guiding element to the upper side of the flow guiding element opposite to the lower side. The guide element is arranged such that it can guide the flow from the inflow region to the outflow region. The flow guiding element (100) has a recess (112, 114) on the side opposite to one or more guide elements (106) for inserting the fixing element (120) for fixing in the blower chamber or combustion air front chamber (20) of the evaporator burner (4).

10. A heating device (2) having an evaporator burner (4) and a blower chamber or combustion air pre-chamber (20), said heating device comprising flow guide inserts (28, 130, 131, 132, 133, 134, 135, 136) according to any one of claims 1 to 6. in, The evaporator burner (4) has a blower chamber or combustion air front chamber (20), an evaporator receiving section (10), and a combustion chamber (8), wherein the evaporator receiving section (10) has a bottom wall (26) and a peripheral wall (30) with at least two combustion air through openings (22) to guide combustion air from the blower chamber or combustion air front chamber (20) first along the outside of the evaporator receiving section (10) through the combustion air through openings (22) of the peripheral wall (30) into the combustion chamber (8). The first region of the flow guide insert (28, 130, 131, 132, 133, 134, 135, 136) extends at least in sections parallel to or deviates from the peripheral wall (30) of the evaporator receiving part (10).

11. A heating device (2) having an evaporator burner (4) and an eccentric blower, said evaporator burner having a blower chamber or a combustion air pre-chamber (20), said heating device comprising the flow guiding system according to claim 9, wherein, The evaporator receiving section (10) has a bottom wall (26) and a peripheral wall (30) with at least two combustion air through openings (22) to guide combustion air from the blower chamber or combustion air front chamber (20) first along the outside of the evaporator receiving section (10) through the combustion air through openings (22) of the peripheral wall (30) into the combustion chamber (8). The first region of the flow guide insert (28, 130, 131, 132, 133, 134, 135, 136) extends at least in sections parallel to or deviates from the peripheral wall (30) of the evaporator receiving part (10).

Images