METHOD FOR PRODUCING A HEATING DEVICE, AND HEATING DEVICE

Abstract

The invention relates to a method of manufacturing a heating device (1) which has a fan (3) located behind a grid (2) in an interior (10). The fan (3) is mounted in the interior (10), and the grid (2) is mounted as a part of the heating device (1). The speed of the fan (3) is determined in a contactless manner by evaluating a reflection behavior of the fan (3) in that a light signal (50) is emitted through a recess (20) in the grid (2) in the direction of the fan (3), and/or is received through a recess (20) in the grid (2) from the direction of the fan (3). Furthermore, the invention relates to a heating device (1).

Claims

1. A method of manufacturing a heating device, wherein the heating device has a fan located behind a grid in an interior of the heating device, the method comprising: mounting the fan in the interior of the heating device; mounting the grid as a part of the heating device; and determining a speed of the fan in a contactless manner by evaluating a reflection behavior of the fan, at least one light signal being emitted through a recess in the grid in a direction of the fan, and/or being received through a recess in the grid from the direction of the fan.

2. The method according to claim 1, wherein the determined speed is compared with a set value and a comparison result is generated, and wherein on the basis of the comparison result, a calibration of the fan and/or of the heating device is carried out, or an adjustment of the fan is carried out, or the fan is replaced.

3. The method according to claim 1, wherein the fan and the grid are mounted jointly before the step of determining the speed.

4. A heating device for heating at least one medium, comprising: a fan located behind a grid in an interior of the heating device, and wherein the grid has a recess allowing light to pass through.

5. The heating device according to claim 4, wherein the recess constitutes a deviation from a grid structure of the grid.

6. The heating device according to claim 4, wherein the recess is configured as a circular recess.

7. The heating device according to claim 4, wherein the grid is configured as a grid having a grid structure including elongated openings.

8. The heating device according to claim 4, wherein the fan has a passage point in a fan wheel and a reflection surface located behind the fan wheel.

9. The heating device according to claim 4, wherein the heating device heats a plurality of media.

10. The heating device according to claim 9, wherein the media is water.

11. The heating device according to claim 9, wherein the media is air.

Description

[0018] In detail, there are a multitude of possibilities for designing and further developing the method according to the invention and the heating device. For this purpose, reference is made, on the one hand, to the claims subordinate to the independent claims, and, on the other hand, to the description below of example embodiments in conjunction with the drawing, in which:

[0019] FIG. 1 shows a detail of a top view of a heating device,

[0020] FIG. 2 shows a partial sectional view of the interior of the heating device of FIG. 1, and

[0021] FIG. 3 shows a schematic representation of a measurement of the speed.

[0022] FIG. 1 shows a part of a heating device 1 which serves to heat two media. The media are here exemplarily air for heating a room and water. In particular, the area around a fan 3, which transports fresh air into the heating device 1, is shown. The fan 3 is located behind a grid 2, which prevents objects from being pulled into the fan 3 or a person from reaching into the fan 3 during operation. It can be seen that the grid 2 has been attached to the housing of the heating device 1 via a screw on the lower left edge.

[0023] The grid 2 generally has a grid structure which is characterized by elongated openings. The recess 20 which is circular in the example embodiment shown is provided in the region of the fan 3. Therefore, the recess 20 is a deviation from the remaining grid structure. It allows the speed of the fan 3 to be determined without contact by evaluating the reflection of light signals.

[0024] FIG. 2 shows the interior 10 of the heating device 1 of FIG. 1 in which the fan 3 is located behind the grid 2.

[0025] The fan 3 has a fan wheel 30 in which a passage point 31 is arranged. A reflection surface 32 which is here generated by a fastening rib is located therebehind. In case the fan wheel 30 is in a favorable position during rotation, a light signal can pass through the recess 20 in the grid 2 and through the passage point 31 in the fan wheel 30 to the reflection surface 32, and can be reflected back from there. The detection of the light signals is interrupted by a rotation of the fan wheel 30, from which the speed can be derived.

[0026] The recess 20 in the grid 2 has in particular the advantage of not disturbing the measurements even in the mounted state. For example, this allows the joint mounting of the fan 3 and the grid 2 as an already assembled manufacturing component.

[0027] FIG. 3 shows a schematic view of a heating device 1 and a device for determining the speed of the fan 3 of the heating device 1.

[0028] The heating device 1 is fully assembled with the fan 3 in the interior 10 and the grid 2 in the wall of the heating device 1.

[0029] The measuring device 5 includes a light emitting and receiving device 51 and an evaluation device 51 for determining the speed of the fan 3 on the basis of the emitted and received light signals.

[0030] During measurement, the fan 3 is operated at a predetermined speed as a set value. Light signals 50 are emitted from the measuring device 5 and, for example after reflection at the surface of the fan wheel, are received as reflected signals. The effective speed is determined from the sequence of the received signals in connection with the data regarding the emitted signals, to generate a comparison result by a comparison with the set speed.