POT LID WITH SIGNALING DEVICE

Abstract

A low-pressure vessel cover includes a plate-shaped base for placing on a vessel edge of a low-pressure vessel, a first opening in the base, and an acoustic signaling device for detecting a boiling point of a liquid which is heated in the low-pressure vessel. The signaling device includes a note-sounding plate system, which has a note-sounding plate, a note-sounding plate opening, and a note-sounding tongue. The note-sounding plate system is arranged in a first flow channel which extends from the first opening in the base to a first outlet opening such that the note-sounding tongue is excited by out-flowing fluid and generates a signaling tone of at least 40 dB.

Claims

1. A low-pressure vessel lid comprising a plate-shaped base plate for placing on a vessel edge of a low-pressure vessel, a first opening in the base plate, an acoustic signal device for detection of a boiling point of a liquid which is heated in the low-pressure vessel, wherein the signalling device comprises a note-sounding plate system with a note-sounding plate and a note-sounding plate opening and a note-sounding tongue, wherein the note-sounding plate system is arranged in a first flow channel which extends from the first opening in the base plate to a first outlet opening so that the note-sounding tongue is excited by out-flowing liquid and generates a signalling tone of at least 40 dB.

2. The low-pressure vessel lid according to claim 1, wherein a first valve is provided via which the first opening in the base plate of the low-pressure vessel lid is configured to can be closed by an actuating means which prevents the excitation of the note-sounding plate.

3. The low-pressure vessel lid according to claim 1, wherein an excess pressure valve is provided and arranged in the first flow channel.

4. The low-pressure vessel lid according to claim 1, further comprising a component having a thermal capacity which is higher than the thermal capacity of the note-sounding plate system, said component being located inside the first flow channel.

5. The low-pressure vessel lid according to claim 1, wherein the wall of the first flow channel is fabricated from a material which has a higher thermal capacity than the note-sounding plate system.

6. The low-pressure vessel lid according to claim 1, wherein a second opening is provided in the base plate of the low-pressure vessel, through which fluid can also be guided from the low-pressure vessel.

7. The low-pressure vessel lid according to claim 6, wherein a second valve is provided wherein the second opening is configured to close with an operating means.

8. The low-pressure vessel lid according to claim 7, wherein the first valve and the second valve can be actuated by a snap-in rocker switch.

9. The low-pressure vessel lid according to claim 1, wherein a lid handle with a lid handle housing is provided in which the following are arranged: the signalling device with the note-sounding plate system, a first flow channel which opens into the first outlet opening, the second flow channel which opens into the second outlet opening. the first valve for closing the first opening, and the second valve for closing the second opening, wherein the rocker switch for actuating the two valves is arranged on the housing.

10. The low-pressure vessel lid according to claim 1, wherein the note-sounding tongue is surrounded by an air gap having a total area corresponding to a maximum of 4% of the area of the note-sounding plate opening.

11. The low-pressure vessel lid according to claim 1, wherein the note-sounding plate system delivers a tone having a frequency below 400 Hz.

12. The low-pressure vessel lid according to claim 1, wherein the note-sounding plate system is aligned obliquely to the longitudinal extension of the substantially horizontally running flow channel, and encloses an angle of 35 to 55 with an underside of the first flow channel.

13. The low-pressure vessel lid according to claim 12, wherein the note-sounding tongue is fastened to the note-sounding plate with a note-sounding tongue foot, wherein the note-sounding plate foot is aligned in the direction of the base plate of the low-pressure vessel lid, so that condensate which occurs can flow off in the direction of the note-sounding plate foot as a result of gravity.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In the figures:

[0051] FIG. 1: shows a note-sounding plate system in front view,

[0052] FIG. 2: shows a note-sounding plate system in sectional view according to the line of intersection A/A from FIG. 1,

[0053] FIG. 3: shows a lid handle with double valve system in the closed state,

[0054] FIG. 4: shows the lid handle from FIG. 3 in the open/closed state,

[0055] FIG. 5: shows a view from underneath of the lid handle with incorporated form seal and inserted note-sounding plate system,

[0056] FIG. 6: shows the form seal from FIG. 5 with inserted note-sounding plate system in the released state, and

[0057] FIG. 7: shows a note-sounding plate system according to the disclosure.

DETAILED DESCRIPTION OF THE DRAWINGS

[0058] FIGS. 1 and 2 show a note-sounding plate system 20 in front view (FIG. 1) and in sectional view (FIG. 2) according to the line of intersection A/A from FIG. 1.

[0059] A note-sounding plate 22 with a note-sounding plate opening 24 is shown. The note-sounding plate 22 forms a type of frame which is largely covered by a note-sounding tongue 26. The note-sounding tongue 26 is fastened, preferably welded or riveted, at the end of the note-sounding plate 22 by means of its note-sounding tongue foot 28. Thus, the note-sounding plate 22 has a note-sounding tongue side 30 and a rear side 32.

[0060] The note-sounding tongue 26 largely covers the note-sounding plate opening 24 but a circumferential air gap 25 (cannot be seen, cf. FIG. 7) having the smallest possible width remains. It is essential that the air gap is sufficiently large to enable a vibration of the note-sounding tongue 26 but at the same time, the air gap should be as small as possible to provide the largest possible closed surface for the incident fluid. It has been shown that of the total area of the note-sounding plate opening 24, a maximum of 4%, preferably only 1 to 2% should remain free.

[0061] In the exemplary embodiment shown, the note-sounding tongue 26 has a note-sounding tongue head 34 which has a greater thickness than the remaining course of the note-sounding tongue 26. This results in an increased mass at the free end of the note-sounding tongue 26 which in turn supports the vibration of the note-sounding tongue 26. The mass distribution directly determines the frequency, in the exemplary embodiment the note-sounding tongue achieves approximately 400 Hz.

[0062] FIGS. 3 and 4 show a preferred lid handle 36 in cross-section, once in the closed state (FIG. 3) and one in the open/closed state (FIG. 4). The lid handle 36 is arranged on a plate-shaped base plate 37 of a lid with a first opening 39 and a second opening 41. Through these openings 39, 41 in the base plate fluid or steam can escape from a low-pressure cooking vessel also not shown and flow into the lid handle 36. According to the disclosure, the openings 39, 41 can be closed by means of a first valve 38 and a second valve 40. The valves 38, 40 have plate seals 42 at the end for resting on the base plate. Said valves are connected to a rocker switch 46 via telescopic locking bolts 44.

[0063] Extending parallel to the telescopic locking bolts 44 which have locking grooves 48 are spring plates 50 with locking lugs 52 which can engage in the locking grooves 48 of the telescopic locking bolts 44. The telescopic locking bolts 44 each contain a spring-loaded pin which has the effect that in a central position of the rocker switch 46, as shown in

[0064] FIG. 3, both valves 38, 40 or plate seals 42 rests on the base plate 37 and close the openings 39, 41.

[0065] The rocker switch 46 is mounted in the lid handle housing 54 in which all the other elements of the note-sounding plate system 20 are arranged.

[0066] Only the following valve positions are possible as a result of the rocker switch 46: [0067] Position 1: first valve 38 (note-sounding plate) open/second valve 40 closed, [0068] Position 2: first valve 38 (note-sounding plate 22) closed/second valve 40 open [0069] Position 3: valve 38 (note-sounding plate 22) closed/second valve 40 closed

[0070] It is provided that after the user has heard the acoustic signal for a sufficiently long time and as a result of the reasons listed (for example, clattering) the user changes the valve position. In this example, from position 1 to 2.

[0071] FIG. 5, which shows a view of the lid handle 36 from underneath illustrates that a first flow channel 56 leads from a first opening 39 in the base plate 37 to a first outlet opening 58. A second flow channel 60 leads from the second opening 41 in the base plate 37 to a second outlet opening 62. The note-sounding plate system 20, i.e. the note-sounding plate 22 with the note-sounding tongue 26 is arranged inside the first flow channel 56. The lid handle 36, in particular the two flow channels 56, 60 and the two valves 38, 40 are sealed by means of a form seal 64 with respect to the base plate of the low-pressure vessel lid.

[0072] FIG. 6 shows the form seal 64 with inserted note-sounding plate system 20 released from the lid handle 36. The first flow channel 36 has a wall 68 which can preferably be fabricated from a material which has a higher thermal capacity than the note-sounding plate system 20. Alternatively, a component not shown having such a higher thermal capacity can be provided in the first flow channel 58. In particular, it is also possible that the entire form seal 64 is formed from a material having higher thermal capacity.

[0073] Openings 66 for the spring-loaded pins 53 can be identified in the form seal 64.

[0074] In particular, FIGS. 5 and 6 show the arrangement of the note-sounding plate system 20 according to the disclosure in the lid handle 36. It can be seen that this is arranged obliquely with respect to the perpendicular or flow direction and preferably encloses an angle of 35 to 55, preferably 45 with an underside of the first flow channel 56 formed by a surface of the low-pressure vessel lid, in particular the base plate 37. In particular, the note-sounding tongue foot is facing the base plate 37 so that accumulating condensate flows due to gravity in the direction of the note-sounding tongue foot 28 and the air gap 25 surrounding the note-sounding tongue 26 remains largely free as a result.

[0075] The form seal 64 is preferably formed as a separate and removable element, preferably made of silicone.

[0076] The disclosure is not restricted to the depicted exemplary embodiments and features but also covers further features which lie within the scope of protection of the patent claims.

[0077] For example, in addition to the positioning of the note-sounding plate system in the lid handle 36, other installation positions are also feasible. Thus, the note-sounding plate system 36 can, for example, be installed in a recess in the lid or the vessel wall. Likewise, a concealed installation in one or both side handles of the vessel is feasible.