GB2359235A - Heater mounting in liquid heating apparatus - Google Patents
Heater mounting in liquid heating apparatus Download PDFInfo
- Publication number
- GB2359235A GB2359235A GB0002319A GB0002319A GB2359235A GB 2359235 A GB2359235 A GB 2359235A GB 0002319 A GB0002319 A GB 0002319A GB 0002319 A GB0002319 A GB 0002319A GB 2359235 A GB2359235 A GB 2359235A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid heating
- heater
- mounting ring
- vessel
- heating vessel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 title claims abstract description 19
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009835 boiling Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/21—Water-boiling vessels, e.g. kettles
- A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
- A47J27/21041—Water-boiling vessels, e.g. kettles electrically heated with heating elements arranged outside the water vessel
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Cookers (AREA)
Abstract
A liquid heating vessel 2 comprises a vessel body 6, a mounting ring 14 bonded to a flange 12 formed in the bottom of the vessel body 6, a heater 26 mounted to the mounting ring 14, and a seal 58 arranged between the mounting ring 14 and the heater 26. Thick film or sheathed elements are disclosed.
Description
2359235 1 - LIQUID HEATING APPARATUS The present invention relates to
liquid heating vessels and in particular to water boiling apparatus such as kettles and hot water jugs.
Traditionally, liquid heating vessels such as kettles and hot water jugs have been provided with heaters which extend into the body of the vessel through an opening in the side wall of the vessel. Such heaters are difficult to clean, as indeed are the vessels themselves, particularly in the area around the heater.
More recently it has become common for such vessels to use planar heaters which are mounted to close an opening in the base of the vessel body, the heater thereby effectively forming a portion of, and in some cases substantially the whole of, the vessel base. The electrical connections to and the control for the heater are contained in a base compartment arranged under the base of the vessel body. Such arrangements are easier to clean, as the heater does not interfere with the cleaning of the inside of the vessel. It is still difficult, however, to clean fully the inside of the vessel and the heater.
A possible solution to this problem was discussed in our International Patent Application PCT/GB99/03543. This application proposed removably mounting the heater in the base of the vessel so that it could be removed f rom the vessel as a unit to allow the vessel to be fully cleaned, for example by being placed in a dishwasher.
In one embodiment of that application, it was proposed that the body of the vessel be made of glass or some other ceramic material, which would not only afford easy cleaning but also gives a pleasing aesthetic appearance. It was further proposed to mount the heater to the vessel via a mounting ring which was attached, eg bonded to, the vessel body. A seal was arranged between the vessel body and the heater to prevent water escaping from the base of the vessel.
However, it has been found that due to the tolerances involved in attaching the mounting ring to the vessel body, it is not possible to obtain a satisfactory seal in this manner. The present invention therefore seeks to provide an improved mounting arrangement which will improve the seal between the vessel body and the heater.
From a first aspect, therefore, the invention provides a liquid heating vessel comprising a vessel body, a mounting ring attached to the bottom of said vessel body, a heater mounted to said mounting ring, and a seal arranged between said mounting ring and said heater.
Thus in accordance with this invention, a seal is arranged between the heater and the mounting ring, rather than between the heater and the vessel body. In this way mounting tolerances between mounting ring and the heater do not need to be considered, and the heater and mounting ring can be accurately manufactured to give a reliable seal.
Preferably the mounting ring is plastics, and it is preferably bonded to the vessel body, most preferably to an inwardly projecting flange formed on the vessel body.
Preferably the heater has a mounting flange for engagement with the mounting ring which is preferably also of plastics.
Preferably one of the mounting ring and the mounting flange is provided with a circumferentially extending channel groove for receiving the seal. Most preferably the channel is provided on the mounting ring.
and preferably its radially outer wall locates in the opening in the vessel base.
Preferably the channel walls project from the surrounding surface for accurate engagement with the is opposing surface, which preferably includes a rib which in use will project into the channel to assist in coOmpressing the seal.
The mounting ring and mounting flange may be provided with releasable fastening means such as bayonet fittings to allow removal of the heater.
The heater may be a thick f ilm heater or a heater one of type comprising a sheathed heating element attached to the underside of a plate. Most preferably the plate comprises a peripheral groove which mounts the mounting flange, in the manner described in our UK patent application GBA-2301434.
A preferred embodiment will now be described by way of example only with reference to the accompanying drawings in which:
Figure 1 shows a sectional view through a kettle in accordance with the invention.
With reference to Figure 1, a cordless kettle comprises a heating vessel 2 and a power supply stand 4 upon which the vessel is placed to receive power during use. Only the bottom part of the vessel is shown, but it will also have, for example, a handle and a filling and pouring spout (not shown).
The heating vessel 2 has a body 6 made f rom, transparent or translucent heat resistant glass. The base 8 of the vessel body 6 is formed with an aperture 10 surrounded by an annular flange 12.
The aperture 10 receives a plastics mounting ring 14 which has a downwardly facing channel 16 formed around its inner periphery. The outer wall 18 of the channel 18 locates within the aperture 10. The mouth 20 of the channel 16 projects proud from the surrounding surface.
The mounting ring 14 has an radially extending annular surface 22 which is bonded to the undersurface of the vessel body f lange 12 by a suitable heat resistant adhesive. A plurality of circumferentially 4 equispaced bayonet hooks 24 depend from the mounting ring 14 in order to mount a heater assembly 26.
The heater assembly 26 comprises a thick film heater 28, a plastics mounting flange 30, and a combined electrical connector and control unit 32 for the heater 28. The unit 32 is mounted to the heater 28 eg by riveting or welding, and may be of a type similar to the Applicant's U2830 commercially available control adapted to sense boiling through a sump 34 provided in the heater. Such boiling detection is described in WO 97/04694.
The thick film heater 28 comprises a metal, eg stainless steel, plate 36 upon which is deposited in known manner an insulating layer and one or more heating tracks. The plate 36 includes a peripheral channel 38 which receives an annular seal 40 and a depending annular wall 42 of the mounting flange 30. The heater plate 36 is fixed to the mounting member by rolling the outer channel wall 42 over a bead 46 formed on the lower end of the wall 42 of the mounting flange 30. This method of attachment of a heater plate to a support is described in further detail in GB-A- 2301434.
The mounting flange 30 comprises a number of openings 50 for receiving the bayonet hooks 24 of the mounting ring 14. It also has a surface 52 which faces and engages with the projecting mouth 20 of the mounting ring channel 16. A lip 54 is raised from the surface 52 for location within the channel 16. A seal 58 is located within the channel 16.
The mounting ring 14 and the mounting flange 30 can be accurately manufactured such that when the mounting flange 30 is bayonet fitted onto the mounting ring 14 the seal 58 is properly compressed so as to form a water tight seal therebetween. This is much more accurate than trying to seal the heater assembly against the vessel itself, since the variable of bond thickness, for example is eliminated.
- 5 The mounting flange 30 also includes a number of bores 60 for receiving screws 62 which retain a skirt 64. The bottom surface of the skirt 64 is closed by a cover 66.
It will be appreciated that the embodiment described above is merely exemplary and modifications may be made thereto without departing from the scope of the invention. For example, the heater may be an underfloor mounted sheathed heating element.
6
Claims (13)
1. A liquid heating vessel comprising a vessel body with an opening in the base thereof, a mounting ring attached to the bottom of said vessel body, a heater mounted to said mounting ring, and a seal arranged between said mounting ring and said heater.
2. A liquid heating vessel as claimed in claim 1 wherein the mounting ring is plastics.
3. A liquid heating vessel as claimed in claim 1 or 2 wherein the mounting ring is bonded to the vessel body.
4. A liquid heating vessel as claimed in claim 3, wherein the mounting ring is mounted to an inwardly projecting flange formed on the vessel body.
5. A liquid heating vessel as claimed in any preceding claim wherein the heater has a mounting flange for engagement with the mounting ring.
6. A liquid heating vessel as claimed in claim 5 wherein said mounting flange is plastics.
7. A liquid heating vessel as claimed in any preceding claim wherein one of the mounting ring and the heater is provided with a circumferentially extending channel groove for receiving the seal.
8. A liquid heating vessel as claimed in claim 7 wherein the channel is provided on the mounting ring.
9. A liquid heating vessel as claimed in claim 8 wherein the radially outer wall of the channel locates in the opening in the vessel base.
7
10. A liquid heating vessel as claimed in claim 8 or 9 wherein the channel walls project from the surrounding surface for engagement with an opposing surface.
11. A liquid heating vessel as claimed in claim 10 wherein said opposing surface includes a rib which projects into the channel.
12. A liquid heating vessel as claimed in any preceding claim wherein the mounting ring and heater are provided with releasable fastening means.
13. A liquid heating vessel as claimed in any preceding claim wherein said heater is a thick film heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0002319A GB2359235A (en) | 2000-02-01 | 2000-02-01 | Heater mounting in liquid heating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0002319A GB2359235A (en) | 2000-02-01 | 2000-02-01 | Heater mounting in liquid heating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0002319D0 GB0002319D0 (en) | 2000-03-22 |
| GB2359235A true GB2359235A (en) | 2001-08-15 |
Family
ID=9884771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0002319A Withdrawn GB2359235A (en) | 2000-02-01 | 2000-02-01 | Heater mounting in liquid heating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2359235A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2319449A (en) * | 1996-11-08 | 1998-05-20 | Strix Ltd | Sealing/mounting heating element structure to liquid heating vessels |
-
2000
- 2000-02-01 GB GB0002319A patent/GB2359235A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2319449A (en) * | 1996-11-08 | 1998-05-20 | Strix Ltd | Sealing/mounting heating element structure to liquid heating vessels |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0002319D0 (en) | 2000-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |