Indoor heating apparatus

Abstract

To provide an indoor heating apparatus having an extended function.SOLUTION: An indoor heating apparatus (1) according to the present invention comprises a radiation pipe (6) that is connected to a pressure and mixing chamber casing (9). In the indoor heating apparatus (1), the radiation pipe (6) has one side connected to a return flow chamber having a ventilator (11), and has the other side connected to a mixing chamber having a flame pipe and an allocated burner unit. The burner unit (10) has two burners that are operated by fuel media different from each other. Additionally, switching means for selectively actuating only one of the two burners exists.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a space heating device and a method for operating a space heating device.

[0002] Such a room heating system forms a radiant heating system capable of heating the interior of a building.

[0003] The known space heating device has a pressure and mixing chamber casing with a burner and a ventilator. A radiant tube is connected to this unit to form a heat passage. For this purpose, the pressure and mixing chamber casing is provided with a feed and a return connection. The heat flow generated by the burner is fed into the radiant tube via the feed connection. The return flow in the radiant tube is fed back into the pressure and mixing chamber casing via the return connection. This forms a closed circuit.

[0004] The space heating device mentioned at the outset is known from EP 0 503 489 A1. The known space heating device has a radiant tube connected to a pressure and mixing chamber casing of a duct system arranged above the room to be heated. The radiant tube is connected on the one hand to a return chamber with a ventilator and on the other hand to a mixing chamber with a flame tube surrounding a burner. The pressure and mixing chamber casing is designed in a double-scroll manner. In this case, two cylindrical parts form the casing, the front plate and the rear plate have a double-scroll shape, while the connecting pipe for the radiant tube is connected to the rear plate.

[0005] With the known room heating system, it is achieved that a vortex zone is formed in the pressure and mixing chamber housing, in such a way that a hot core zone in the region of the burner is surrounded by a cool air layer of the return gases, thus achieving a uniform heat release in the radiant tube over a large area.

[0006] The problem underlying the present invention is to provide a space heating device with extended functionality.

[0007] To achieve this goal, a space heating device is specified having the features of claim 1. Advantageous embodiments and expedient refinements of the invention are set forth in the dependent claims.

[0008] The invention relates to a space heating device, which comprises a radiant tube connected to a pressure and mixing chamber casing. The radiant tube is connected on the one hand to a return chamber with a ventilator and on the other hand to a mixing chamber with at least one flame tube and an assigned burner unit. The burner unit has two burners operated with different fuel media. Furthermore, switching means are present for selectively activating only one of the two burners.

[0009] The invention also relates to a corresponding method.

[0010] The basic idea of ​​the invention is to provide a burner unit for a space heating device with two burners operated with different fuel media, whereby by means of a switching means, advantageously only one burner is always activated and used for operating the space heating device.

[0011] Alternatively, both burners may be operated by a switching means.

[0012] In this case, both activated burners are operated at a low power stage.

[0013] The burner units form a versatile and redundant system that increases the flexibility and availability of the space heating system.

[0014] The burner unit according to the invention increases the safety, especially with respect to shutdown of the space heating system. Particularly advantageously, the switching means activates the burner that can use the fuel medium. If the fuel medium for one burner is not available, for example due to a supply bottleneck or the like, the switching means activates the other burner that can use the fuel medium, thereby avoiding an undesired shutdown of the space heating system.

[0015] The probability of the room heating system shutting down is extremely low, since the probability of not being able to use both fuel media for the burner units at the same time is low.

[0016] Various fuel media are suitable for operating the burners of the space heating system, for example gas, fuel oil, diesel or kerosene, electrically operated burners are also possible.

[0017] Particularly advantageously, the burner unit comprises a gas burner and an oil burner.

[0018] This allows the burner to be operated with a conventional fuel medium, which allows a high heating output to be achieved.

[0019] Advantageously, electrical or electronic switching means are provided.

[0020] In this case, the switching means can be formed by relays, semiconductor switches and the like.

[0021] Particularly advantageously, the switching means provides for manual or automatic burner switching.

[0022] Manual burner switching can be performed by a user who operates a corresponding operating means, whereas automatic burner switching is performed automatically, in particular program-controlled.

[0023] To this end, the burner is advantageously controlled by a control unit.

[0024] In this case, the control unit may comprise adjusting means for operating the switching means.

[0025] As adjustment means, the control unit may have an operating field or the like, by means of which the user can effect burner switching.

[0026] Alternatively or additionally, the control unit is implemented with a sequential program that automatically performs the burner switching.

[0027] A sequential program can, for example, evaluate control variables, sensor signals and the like that provide information regarding the availability of the fuel medium, and then perform burner switching automatically depending on such information.

[0028] The room heating device according to the present invention forms a circulatory system in which the radiant tube is connected to the pressure and mixing chamber casing by a feed and return path, thereby forming a closed circuit. The hot air flow heated by the burner unit is fed into the radiant tube via the feed path, guided in this radiant tube and fed back to the pressure and mixing chamber casing via the return path. The ventilator of the pressure and mixing chamber casing creates an air circulation between the feed and return paths and at the same time stabilizes the flame of the burner unit.

[0029] In this unit, the pressure inside the radiant tube is advantageously lower than atmospheric pressure, and a higher pressure is only formed inside the pressure and mixing chamber casing, advantageously in the area of ​​the chimney which controls and guides harmful substances to the outside. The room heating device thus constructed forms a self-regulating system which in particular avoids uncontrolled escape of flue gases.

[0030] This is achieved in particular by a structurally advantageous design in which the pressure and mixing chamber housing is designed in the form of a triple scroll with three scroll segments.

[0031] In this case, the first scroll segment is assigned a ventilator, the second scroll segment is assigned a first burner, and the third scroll segment is assigned a second burner.

[0032] According to an alternative embodiment, the pressure and mixing chamber casing is formed in the form of a double scroll with two scroll segments.

[0033] In this case, the ventilator is assigned to the first scroll segment, both burners are assigned to the second scroll segment, and the second burner is assigned to the third scroll segment.

[0034] Preferably, the ventilator and burner are supported in an opening in the back wall of the pressure and mixing chamber casing opposite the radiant tube.

[0035] According to an advantageous embodiment, there is an adjusting flap which effects the division of the air flow generated by the ventilator to the second and third scroll segments equipped with the burners.

[0036] Thus, by adjusting the tuning flap, the airflow to both scroll segments equipped with burners can be optimized.

[0037] Particularly advantageously, the space heating system is operated by adjusting the regulating flap in a manner suited to operation with the respective burner.

[0038] In particular, the adjustment of the regulating flap is carried out before the start of operation of the room heating system.

[0039] Before starting operation, the adjusting flaps are adjusted manually or via a servo motor, so that optimized air flow conditions are obtained, regardless of which burner is just being operated.

[0040] This significantly simplifies the operation of the space heating system compared to an operating mode in which the regulating flap is switched depending on which burner is activated. Of course, such an operating mode is also possible.

[0041] The present invention will now be described with reference to the drawings. [Brief description of the drawings]

[0042] [Figure 1] FIG. 1 shows an embodiment of the installation of a room heating device according to the present invention in a building. [Diagram 2] FIG. 2 is a cross-sectional view of the unit shown in FIG. [Diagram 3] FIG. 2 is a perspective view of the pressure and mixing chamber casing of the room heating device shown in FIG. 1, equipped with a burner unit. [Figure 4] FIG. 4 is a cross-sectional view of the unit shown in FIG. [Diagram 5] FIG. 1 is a cross-sectional view of a pressure / mixing chamber casing equipped with a burner unit and a ventilator. [Figure 6] FIG. 3 shows a circuit assembly for controlling a burner of the burner unit of the room heating device shown in FIGS. 1 and 2.

[0043] 1 and 2 show an embodiment of a room heating device 1 according to the present invention. This room heating device 1 is installed below the roof 2 of a building 3, in particular a hall. The components of the room heating device 1 are supported in a suspended state by mounting means 4 attached to the roof 2 of the building 3. The room heating device 1 heats an interior room 5 of the building 3.

[0044] The room heating device 1 comprises a radiant tube 6, which is connected both by the feed line 7 and by the return line 8 to a pressure and mixing chamber casing 9, in which a burner unit 10 and a ventilator 11 are located. A flame is generated by the burner unit 10, which heats an air flow that is fed into the feed line 7 of the radiant tube 6. This air flow passes through the radiant tube 6 and is fed back into the pressure and mixing chamber casing 9 via the return line 8.

[0045] The air flow in the radiant tube 6 generates thermal radiation which heats up the interior room 5 of the building 3. In figure 2 the spatial distribution 12 of the thermal radiation is shown.

[0046] 3 to 5 show the pressure / mixing chamber casing 9. A connecting pipe 13a for the feed path 7 of the radiation tube 6 and a connecting pipe 13b for the return path 8 of the radiation tube 6 are opened in the front wall of the pressure / mixing chamber casing 9. The radiation tube 6 is connected to these connecting pipes 13a and 13b.

[0047] The pressure and mixing chamber casing 9 of the room heating device 1 according to the invention has the form of a triple scroll with three cylindrical scroll segments 14a, 14b, 14c. The first scroll segment 14a is assigned to a ventilator 11 (FIG. 5). An opening 16 is present to connect this ventilator 11 to the back wall 15 of the pressure and mixing chamber casing 9, facing away from the radiant tube 6.

[0048] The burner unit 10 comprises two burners 17a, 17b, the first burner 17a being assigned to the second scroll segment 14b and the second burner 17b being assigned to the third scroll segment 14c.

[0049] Both burners 17a, 17b are operated with different fuel media: in the present case the first burner 17a is a gas burner and the second burner 17b is an oil burner.

[0050] Moreover, both burners 17a, 17b are supported on the back wall 15 of the pressure and mixing chamber casing 9. The outlet of each burner 17a, 17b leads to a flame tube 18a, 18b. This flame tube 18a, 18b and thus also the flame generated by the corresponding burner 17a, 17b are directed into the connecting tube 13a, 13b of the feed passage 7. The flame of each burner 17a, 17b thus generates a heated air flow, which is introduced into the feed passage 7 of the radiant tube 6.

[0051] The fan 11 creates an air circulation between the feed line 7 and the return line 8. Furthermore, the air flow generated by the fan 11 is divided by an adjusting flap 19 in such a way that a partial air flow is supplied to the first burner 17a and a partial air flow is supplied to the second burner 17b. The air flow and the partial air flows are indicated by arrows in FIG.

[0052] According to the invention, only one burner 17a, 17b of the burner unit 10 is always activated selectively via switching means 20. A corresponding diagram of such a unit is shown in FIG.

[0053] The control of the switching means 20 for the burner selection is effected in this case by a control unit 21, which is advantageously also used for the process control of the space heating device 1. This control unit 21, as is known, comprises a processor unit 22 and an input / output unit 23 with a display or the like.

[0054] As switching means 20, electrical or electronic switching means 20, such as relays, semiconductor switches and the like, may be provided.

[0055] In general, operation of the switching means 20 may result in manual or automatic burner switching.

[0056] In this case, the user can effect manual burner switching by inputting at the input / output unit 23 of the control unit 21 .

[0057] Alternatively or additionally, the control unit 21 is implemented with a sequential program that automatically performs the burner switching.

[0058] Depending on the burner changeover that has been carried out, the room heating device 1 is only operated with the gas burner or with the fuel oil burner.

[0059] Before starting operation, the adjusting flap 19 is adjusted so that the partial air flow generated thereby is suitable for operation of the room heating device 1 with a gas burner or suitable for operation of the room heating device 1 with a heavy oil burner.

[0060] Advantageously, the switching means 20 is operated depending on the availability of fuel medium for the burners 17a, 17b.

[0061] This means that the burners 17a, 17b for which there is now sufficient fuel medium are operated. [Explanation of symbols]

[0062] 1. Indoor heating system 2. Roof 3. Building 4. Mounting Means 5 Inner room 6 radiation tube 7. Delivery Path 8 Return Route 9 Pressure and mixing chamber casing 10 Burner unit 11 Ventilator 12 Distribution 13a, 13b Connecting pipe 14a, 14b, 14c Scroll Segments 15 Back wall 16 Aperture 17a, 17b Burner 18a,18b Flame tube 19 Adjustment flap 20 Switching means 21 Control unit 22 Processor Unit 23 Input / Output Unit

Claims

1. In an indoor heating system (1), the system comprises a radiating pipe (6) connected to a pressure / mixing chamber casing (9), the radiating pipe (6) being connected on one side to a return chamber equipped with at least one ventilator (11), and on the other side to a mixing chamber equipped with flame tubes (18a, 18b) and an assigned burner unit (10), The indoor heating device (1) is characterized in that the burner unit (10) has two burners (17a, 17b) which are operated by different fuel media, and a switching means (20) is provided that allows the two burners (17a, 17b) to be operated selectively.

2. The indoor heating device (1) according to claim 1, characterized in that either only one burner (17a, 17b) is operated by the switching means (20), or both burners (17a, 17b) are operated by the switching means (20).

3. The indoor heating device (1) according to claim 2, characterized in that both of the activated burners (17a, 17b) are operated at a low output stage.

4. The indoor heating device (1) according to claim 1 or 2, characterized in that the burner unit (10) comprises a gas burner and a heavy oil burner or a kerosene burner.

5. The indoor heating device (1) according to claim 1 or 2, characterized in that the switching means (20) allows for manual or automatic switching of the burners, and / or an electrical or electronic switching means (20) is provided, and / or the burners (17a, 17b) are controlled by a control unit (21).

6. The indoor heating device (1) according to claim 5, characterized in that the control unit (21) has an adjustment means for operating the switching means (20), and / or the control unit (21) has a sequential program implemented in it for automatically performing burner switching.

7. The indoor heating device (1) according to claim 1 or 2, characterized in that the pressure and mixing chamber casing (9) is formed in the form of a triple scroll having three scroll segments (14a, 14b, 14c).

8. The indoor heating device (1) according to claim 7, characterized in that the ventilator (11) is assigned to the first scroll segment (14a), the first burner (17a) is assigned to the second scroll segment (14b), and the second burner (17b) is assigned to the third scroll segment (14c).

9. The indoor heating device (1) according to claim 1 or 2, characterized in that the pressure and mixing chamber casing (9) is formed in the form of a double scroll having two scroll segments (14a, 14b, 14c).

10. The indoor heating device (1) according to claim 9, characterized in that the ventilator (11) is assigned to the first scroll segment (14a), the burners (17a, 17b) are assigned to the second scroll segment (14b), and the second burner (17b) is assigned to the third scroll segment (14c).

11. The indoor heating device (1) according to claim 10, characterized in that the ventilator (11) and the burners (17a, 17b) are supported within an opening (16) provided in the back wall (15) of the pressure and mixing chamber casing (9) opposite to the radiating pipe (6).

12. The indoor heating device (1) according to claim 11, characterized in that an adjustment flap (19) is provided that can divide the airflow generated by the ventilator (11) to the second and third scroll segments (14b, 14c) equipped with the burners (17a, 17b).

13. The indoor heating device (1) is operated in a manner suitable for operation of each of the burners (17a, 17b) by adjusting the adjustment flap (19), and the adjustment of the adjustment flap (19) is performed before the start of operation, as described in claim 12.

14. A method for operating an indoor heating system (1), comprising a radiating pipe (6) connected to a pressure and mixing chamber casing (9), the radiating pipe (6) being connected on one side to a return chamber equipped with a ventilator (11), and on the other side to a mixing chamber equipped with flame tubes (18a, 18b) and an assigned burner unit (10), The method is characterized in that the burner unit (10) has two burners (17a, 17b) which are operated by different fuel media, and a switching means (20) is provided for selectively operating the two burners (17a, 17b).

15. The method according to claim 14, characterized in that the switching means is operated according to the availability of the fuel medium for the burners (17a, 17b).

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