CN118076834A - Evaporator for a steam treatment appliance and domestic steam treatment appliance - Google Patents
Evaporator for a steam treatment appliance and domestic steam treatment appliance Download PDFInfo
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- CN118076834A CN118076834A CN202280067064.6A CN202280067064A CN118076834A CN 118076834 A CN118076834 A CN 118076834A CN 202280067064 A CN202280067064 A CN 202280067064A CN 118076834 A CN118076834 A CN 118076834A
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- evaporator
- receiving space
- water
- heating device
- pipe connection
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- 238000010438 heat treatment Methods 0.000 claims abstract description 101
- 239000007788 liquid Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000010411 cooking Methods 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 15
- 230000004048 modification Effects 0.000 description 14
- 238000012986 modification Methods 0.000 description 14
- 230000008901 benefit Effects 0.000 description 12
- 239000002245 particle Substances 0.000 description 9
- 238000010025 steaming Methods 0.000 description 8
- 238000009835 boiling Methods 0.000 description 5
- 239000013505 freshwater Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
- F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/50—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers for draining or expelling water
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Cookers (AREA)
Abstract
The invention relates to an evaporator (1) for a steam treatment appliance, comprising a receiving space (11) for a liquid to be evaporated by means of a surface heating device (6) on the bottom side, which is covered by a cover (2) having a steam outlet pipe connection (12) and a water outlet pipe connection (3), wherein the water outlet pipe connection (3) comprises a first pipe section (3 a) extending inside the receiving space (11), the junction of which is below the maximum level (F max) of the liquid and above the surface heating device (6). A domestic steam treatment appliance having a cooking chamber and an evaporator (1) as described above, wherein a steam outlet pipe connection (12) of the evaporator (1) is in fluid connection with the cooking chamber, and wherein the domestic steam treatment appliance is designed for conveying liquid into a receiving space (11) via a water channel pipe connection (3) and out of the receiving space (11) via the water channel pipe connection (3).
Description
Technical Field
The invention relates to an evaporator for a steam treatment appliance, comprising a receiving space for a liquid to be evaporated by means of a surface heating device on the bottom side, which is covered by a cover having a steam outlet pipe connection and a water inlet pipe connection. The invention also relates to a household steam treatment appliance having a cooking chamber and an evaporator, wherein a steam outlet pipe connection of the evaporator is in fluid connection with the cooking chamber, and wherein the household steam treatment appliance is designed to convey liquid into the receiving space via the water inlet pipe connection and out of the receiving space via the water inlet pipe connection. The invention can be used particularly advantageously in ovens with steam treatment functions.
Background
DE 43,09,240 A1 discloses an evaporator in the form of a flat tank with a bottom made of non-alloyed steel, which is corrosion-resistant at its surface by a nickel layer, which is heated by a tubular heating body. It is kept at a uniform temperature by a thermostat. The vapour is produced by a pump by correspondingly metering the liquid to be evaporated in the same amount as the evaporation takes place almost immediately thereafter on the previously dried evaporator side.
WO 2012/089469 A1 discloses a cooking appliance having: a cooking chamber in which food to be cooked is placed; a steam generator having a main body and a cover covering an upper side of the main body; an inlet through which water can enter the steam generator; and an outlet through which steam generated in the steam generator can exit from the steam generator.
EP 2 298 140 A2 discloses a steam generator for a household appliance, having: an evaporator chamber to which a connection for conveying water and at least one connection for discharging steam are connected in a flow-guiding manner; and having a heatable evaporator surface which is arranged obliquely with respect to the horizontal plane in the installation position, on which evaporator surface an evaporator space for the generated steam is formed and in which evaporator space a steam flow is formed in the direction of the steam outlet, wherein the inflow of water to the evaporator surface can be controlled or regulated by means of a valve or a pump arranged in the supply line, and the water level above the evaporator surface is detected and evaluated by means of a level monitoring device for controlling the water supply to the evaporator surface. In order to design a steam generator for a household appliance, which has a small structural volume and a high heating power or steam efficiency, is designed for continuous generation of steam and reliable prevention of drying of the heating device, a liquid level monitoring device is arranged in the region of the evaporator space of the steam generator, wherein only low or no steam flow strength is formed on the evaporator surface.
DE 10 2014 203 537 A1 discloses an evaporator for a steam treatment appliance, in particular a household appliance, which has a receiving space for a liquid to be evaporated by means of a surface heating device on the bottom side and a steam outlet opening, and two electrical contacts exposed in the receiving space for determining a liquid level in the receiving space, wherein the surface heating device has at least one non-heating region and the at least one electrical contact is arranged above the non-heating region.
DE 10 2014 210 669 A1 discloses an evaporator for a steam treatment appliance, in particular a household appliance, having a receiving space for a liquid to be evaporated by means of a surface heating device on the bottom side, which has a circumferential side edge, wherein the side edge is configured to be convex in cross section at least in sections.
WO 2015/185589 A1 discloses an evaporator for a household appliance. The evaporator has: a receiving space for a liquid to be evaporated by means of an electric heating device and a liquid level sensor for determining the liquid level of the liquid in the receiving space, wherein the liquid level sensor is a sensor operating contactlessly generating an electromagnetic field in the receiving space, which sensor is arranged at the outer side of a housing wall defining the receiving space.
DE 10 2015 205 496 A1 discloses a heating element for a household appliance. The heating element has a metal heating layer, at least one surface heating device for heating the heating layer, and at least one surface sensor structure located between the heating layer and the surface heating device and electrically insulated from one another, wherein the at least one sensor structure has at least two surface sensor sub-structures electrically isolated from one another, which at least partially overlap one another and have corresponding electrical connections. A liquid heating apparatus for a domestic appliance has at least one heating element whose metallic heating layer is arranged as a contact surface with a liquid to be heated. The household cooking appliance is provided with at least one such liquid heating device.
Disclosure of Invention
The object of the present invention is to at least partially overcome the disadvantages of the prior art and in particular to provide an evaporator for a steam treatment appliance which can be produced inexpensively and has a high performance and has a bottom surface heating device, whose scale can be reduced particularly effectively with structurally simple means.
This object is achieved according to the features of the independent claims. Preferred embodiments can be found in particular in the dependent claims.
This object is achieved by an evaporator for a steam treatment appliance, which has a receiving space for a liquid to be evaporated by means of a surface heating device on the bottom side, which is covered by a cover having a steam outlet pipe connection and a water inlet pipe connection, wherein the water inlet pipe connection has a first pipe section extending inside the receiving space, the junction of which is located below the maximum level of the liquid, in particular in connection with a steam generating operation, and above the surface heating device.
The evaporator has the following advantages: the water channel connection is also suitable for sucking liquid from the receiving space, for example after a steaming process or for sucking cleaning liquid, for example descaling liquid.
In the case of suction which should be carried out by means of a pump, the water-passing pipe connection is particularly advantageous in comparison with the bottom-side water-passing pipe connections disclosed in DE 10 2014 203 537 A1, DE 10 2014 210 669 A1 and WO 2015/185589A1, for example, because there is less likelihood of undissolved particles, in particular scale particles, floating in the water being sucked in. This is based on the following recognition: the weight of the particles resists entrainment of the suction flow and is thus more likely to be left behind than the arrangement of the water gate tube on the bottom side where the weight of the particles contributes to their entrainment through the water gate tube. The water-passing pipe connection according to the invention thus serves as a mechanical separator for small insoluble particles which cannot be sucked away with water against gravity. The reduced number of return particles in turn facilitates the service life and function of the pump. The water channel connection is also advantageous compared to a bottom water channel connection, since it thereby avoids a potentially unsealed and corrosion-prone connection, typically a welded connection, of the water channel connection. In addition, it is advantageously possible to provide a surface heating device with a larger heating surface, for example, because the region released by omitting the bottom-side water-supply pipe connection can be used for laying the heating track and thus in turn steam can be produced more quickly with a higher heating power. Another advantage of the water inlet pipe connection compared to the bottom side water inlet pipe connection is that a cheaper standard hose can be used instead of a special shaped hose to connect the pipe connection.
Thus, the water through-port tube can be used both for injecting liquid into the receiving space (e.g. for injecting fresh water during a steaming process of a steam cooking appliance, for injecting fresh water to rinse the receiving space, for injecting cleaning liquid during a cleaning process, e.g. a descaling process, etc.), and for draining or recovering liquid from the receiving space (e.g. for recovering used water after a steaming process or rinsing process, or for removing cleaning liquid, etc.).
The steaming appliance can be a stand-alone steam cooking appliance or a cooking appliance, such as an oven and/or microwave oven with steam cooking functions.
For steam generating operation, the receiving space is used for receiving water brought to boiling by the surface heating device at the bottom side. The steam produced here is discharged from the receiving space via the steam outlet pipe connection. The receiving space side surface of the surface heating device is an evaporator surface. The evaporator surface is in particular at least approximately planar or has in particular an at least approximately planar basic shape.
The liquid to be evaporated can be water with or without additives such as flavouring substances, detergents, etc., but is in principle not limited thereto. It is also possible to adjust the heating power of the surface heating device in such a way that the liquid is heated only and not evaporated. This can be advantageous for example for descaling.
In one modification, the surface heating device has a continuous layer of material, for example stainless steel or ceramic, which conducts heat well and is corrosion-resistant, on its upper side facing the receiving space. On the underside of the layer facing away from the receiving space, one or more electrical resistance heating tracks are mounted, if appropriate by means of a thin, electrically insulating layer, which heat the layer region lying above it when energized. The surface heating device can be designed, for example, similarly to the heating element disclosed in DE 10 2015 205 496 A1. In a modification, the surface heating device has a plurality of independently energizable resistive heating tracks, which has the advantage that the heating power introduced into the surface heating device and thus the amount of steam produced can be varied over a wide range by actuating the individual heating tracks, for example 400W, 800W or 1200W. A modification is to design and arrange the heating track such that a heating zone and a non-heating zone or a significantly lower degree of heating zone are formed on the evaporator face.
A modification is that the resistive heating tracks are thick layer heating tracks, for example embossed thick layer heating tracks. The surface heating device can thus be produced particularly easily, cost-effectively and with high quality and furthermore has a lower overall height, for example only 1cm to 2cm, in particular compared to the use of tubular heating bodies as heating elements. Furthermore, a lower net mass is achieved, for example, compared to the use of tubular heating bodies, so that a lower thermal inertia is maintained, whereby the surface heating device can quickly reach operating temperatures and accelerate steam production.
A modification is that the cover forms the side wall and the top of the receiving space, while the bottom is essentially constituted by the surface heating means. For this purpose, a modification provides for the surface heating device to be arranged in a base part of the evaporator, on which the cover can be placed, for example, by means of a latching device, in particular on an edge or flange of the base part which extends laterally beside the surface heating device. In order to increase the vapor tightness, a particularly circumferential seal, for example a silicone seal, can be present between the cover and the base part. In particular, the electrical connector for the at least one heating track extends through the base part. A modification is that the base part has at least one fastening means, for example at least one foot, for fastening the evaporator. A modification is that the cover and base parts are made of plastic.
A modification is that the steam outlet pipe connector is arranged in a side wall of the cover near the top. By this large distance from the boiling water in the receiving space, it is advantageously achieved that the water droplets contained in the steam (for example, the so-called "spray (Spucker)", which is generated by the boiling movement), are less likely to enter the steam outlet pipe connection than in the lower arrangement. The lateral arrangement in the side wall serves the same purpose, since the spray is mainly directed upwards and thus passes by the outflow opening of the steam outlet pipe connection into the receiving space. In one modification, the steam outlet pipe connection is a substantially horizontally oriented tubular pipe connection, which protrudes on the outside from the side wall of the cover. A steam line, for example a hose, can be connected to the steam outlet pipe connection, which leads to the cooking chamber at its other end.
The water channel connection has a first tube section extending inside the receiving space, which includes, in particular, a transition from the first tube section to a second tube section which is guided outwards through the cover. The second pipe section can be connected with its pipe connection located outside to a liquid line, for example a pump or a valve, at a component of the steam cooking appliance.
A modification is that the first pipe section and the second pipe section are arranged at an angle to each other. The second pipe section can be arranged in particular on a side wall of the cover and can be oriented at least substantially horizontally, which makes it possible to connect the liquid lines in a particularly space-saving manner.
The junction of the first pipe section is below the maximum water level, which enables liquid located in the receiving space at least below the level of the junction to be recovered, in particular sucked, by the water-through pipe connection. The deeper the sink is located, the less the remaining amount of water remains in the receiving space after recovery.
The fact that the junction of the first pipe section is arranged above the surface heating device, i.e. at a distance from the surface heating device and thus does not contact the surface heating device, gives rise to the following advantages: the first tube section is not damaged by direct heat transfer from the surface heating device. The first pipe connection can thus be produced from plastic without problems.
In one embodiment, the first pipe section has a vertical distance from the surface heating device of between 1mm and 5mm, in particular between 1mm and 2 mm. The advantage achieved thereby is that the flow area of the sink opening towards the sink inlet remains small and thus the possibility of recycling particles to the water channel is further reduced. It has been shown that a distance between 1mm and 2mm gives a particularly significant reduction in the amount of particles. A further advantage is that a sufficient thermal distance with respect to the surface heating device is thus achieved and the residual water quantity can be kept to a particularly low level.
An advantageous variant for reducing the residual water quantity is that the surface heating device or its evaporator surface is oriented slightly inclined or at an angle to the horizontal and that the junction of the first pipe section is arranged above the deepest region of the surface heating device.
In one embodiment, the edge of the first tube section on the junction side has a plurality of cutouts (EINSCHNITTE) distributed in the circumferential direction. This gives the advantage that if the outflow opening of the first pipe section is covered on the end side by the planar particles, the water flow can be maintained by the cut-outs in this case. These cuts can be in the form of rectangular depressions or grooves, for example. The edge can also be wave-shaped.
In one embodiment, the first pipe section is oriented vertically, which gives rise to the advantage that the length of the first pipe section is particularly short and therefore saves material, for example, in relation to a tilting arrangement which is in principle, however, also possible.
In one embodiment, the surface heating device or its evaporator surface has at least one unheated or unheated surface area, and the junction of the first pipe section is arranged above the unheated area. This makes it possible to achieve a particularly small distance of the junction of the first tube section relative to the evaporator surface.
In one embodiment, the junction opening of the steam outlet pipe connection into the receiving space is arranged above the non-heating region. This achieves the following advantages: the likelihood of water droplets resulting from boiling being entrained with the steam flow through the steam outlet pipe joint is even further reduced. Thereby improving steam quality. The fewer water droplets contained in the steam flow, the higher the successful reliability of the cooking process.
In one embodiment, the evaporator further has a scale filter mounted in the receiving space, which is arranged laterally spaced apart from the junction of the steam outlet pipe connection. Since it has surprisingly been shown that the water content of the steam at the steam outlet pipe connection is likewise reduced by omitting a scale filter below or immediately in front of the confluence opening of the steam outlet pipe connection. The scale filter is arranged laterally spaced apart from the junction of the steam outlet pipe connection, which in particular comprises the scale filter having a significant lateral distance in top view relative to the junction. A modification is that the distance is at least 2cm, advantageously at least 5cm.
In one modification, the evaporator is equipped with a liquid level sensor. This can be used, for example, by domestic steam treatment appliances in such a way that during the steam treatment operation, the receiving space is refilled with fresh water via the water line connection when the liquid level is low, until the level of the liquid level sensor is reached.
In one variant, the evaporator is equipped with a scale detection device, by means of which the degree of scale of the water in the receiving space and/or the thickness of the scale layer deposited on the surface heating device and/or the inner wall of the cover can be determined at least approximately. The point in time for starting a cleaning process, in particular a descaling process, can thus be determined, for example.
The object is also achieved by a household steam treatment appliance having a cooking chamber and an evaporator as described above, wherein a steam outlet pipe connection of the evaporator is in fluid connection with the cooking chamber such that steam can be conducted into the cooking chamber via the steam outlet pipe connection, and wherein the household steam treatment appliance is at least set up for conveying liquid into the receiving space via the water inlet pipe connection, for example by gravity of the liquid or a pump.
The household steaming appliance can be configured similarly to the evaporator and vice versa, and at least the same advantages are obtained.
For example, it is therefore an embodiment that the domestic steam treatment appliance is designed to also convey liquid out of the receiving space via the water port pipe connection, for example by gravity of the liquid or a pump.
If the domestic steamer is provided with a pump for delivering liquid into and out of the receiving space, either the pump can change its delivery direction or a valve system of similar function can be intermediately connected between the pump and the water-through pipe connection.
A modification is that the used water still in the receiving space after each steaming or steam cooking process is recovered through the water through-port pipe joint. This reduces the likelihood of microbial film formation in the receiving space.
In one embodiment, the household steam treatment appliance is designed to deliver cleaning liquid into the receiving space via the water-through pipe connection and to deliver it out of the receiving space via the water-through pipe connection. This can be performed, for example, within the framework of a separate cleaning process.
Drawings
The above features, features and advantages of the present invention and the manner in which the same are accomplished are more clearly and unequivocally understood in connection with the following illustrative description of the embodiments which is set forth in detail in connection with the accompanying drawings. Wherein:
fig. 1 shows an evaporator in an obliquely upper view with a cover shown in a semitransparent manner; and
Fig. 2 shows the evaporator in a side view in a sectional view through the water port tube connection.
Detailed Description
Fig. 1 shows an evaporator 1 in an obliquely upper view, with a cover 2 shown in a semitransparent manner. Fig. 2 shows a sectional view of the evaporator 1 in a side view through a water feed pipe connection 3 which is guided through the cover 2.
The evaporator 1 has a base part 4 made of plastic, which has a flat, bowl-dish shapeFor receiving a plate-shaped or disk-shaped surface heating device 6 on top. In top view, the support region 5 and the surface heating device 6 have purely exemplary rounded rectangular shapes, wherein the support region protrudes laterally beyond the surface heating device 6 in a circumferential manner and there provides a contact region for the cover 2 or for a circumferential seal 7 that is present between the cover 2 and the support region 5.
The support region 5 also has, for example, at least one fastening means in the form of, for example, at least one leg 8 that can be screwed, a perforation through which an electrical connection 9 for at least one heating track of the guide surface heating device 6 passes, etc.
The cover 2 can be placed with its lower edge directly or for vapor tightness advantageously by means of a seal 7 on the placement area of the base part 4 and can be fastened at the base part 4, where: by means of a plurality of latching connections 10 distributed in the circumferential direction. If the cover 2 is placed, it forms with the surface heating device 6a receiving space 11 for the liquid heated by the surface heating device 6. More precisely, the surface heating device 6 forms the bottom of the receiving space 11, while the cover 2 forms the surrounding side wall of the receiving space 11 and the top of the receiving space.
In the side wall of the cover 2, the steam outlet pipe connection 12 is guided horizontally outwards immediately below the top. The steam outlet pipe connection 12 serves to discharge steam generated by boiling of water by means of the surface heating device 6 into a cooking chamber (not shown) of a domestic steam cooking appliance, in particular an oven (not shown) having a steam cooking function. The arrangement selected reduces the probability of water droplets entering the steam outlet pipe joint 12. The steam outlet pipe connection 12 merges into the receiving space 11 in a region above the non-heating region of the surface heating device 6, whereby the probability of water droplets (e.g. spray) entering the steam outlet pipe connection 12 together with the steam is even further reduced.
Above this non-heated region there is also a sensor element 13 of the level sensor, which has the following advantages: when the heating track of the surface heating device 6 is energized, the water surface there is calmer than above the heating zone and thus the liquid level can also be determined more accurately. By means of which it can be detected whether the liquid in the receiving space 11 has reached the sensor element 13. If this is not the case, water can be refilled through the water-through-port connection, for example. If this is the case, the supply of water can be stopped, for example. Thus, the sensor element 13 of the level sensor determines the maximum level F max of the liquid in the receiving space 11.
The water-through pipe connection 3 has two rectilinear tubular sections, namely a horizontal second pipe section 3b protruding through the side wall of the cover 2 above the maximum liquid level F max, which transitions in the receiving space 11 into a vertical first pipe section 3a at an angle of 90 ° thereto. The first pipe section 3a merges into the receiving space 11 below the maximum liquid level F max, but above the evaporator surface on the upper side of the surface heating device 6, in particular above the evaporator surface, by a distance d of approximately 1mm to 2 mm. The bus-side edge of the first tube section 3a has a plurality of rectangular cutouts 14 (which can also be referred to as "shot holes" (schieβ scharten)) distributed in its circumferential direction. In order to suck the liquid in particular completely, the surface heating device 6 or its upper evaporator surface is slightly inclined, so that the junction of the first pipe section 3a is located above the relatively low-lying region of the surface heating device 6.
A scale filter 15, for example a so-called "scale trap" (Kalkhexe), which serves as an adsorption site for scale instead of the evaporator surface, is arranged in the receiving space 11 below the maximum liquid level F max, laterally spaced apart from the junction on the receiving space side of the steam outlet pipe connection 12 by, for example, 5cm and in particular above the heating region of the surface heating device 6.
The cover 2 can be a component, for example an injection-molded component, which is produced integrally with its water-opening tube connection 3 and its steam-outlet tube connection 12.
For the steam treatment process, water can be transported, for example pumped, by the water-supply pipe connection 3 into the receiving space 11 and boiled by the surface-heating device 6, wherein the generated steam is discharged into the cooking chamber via the steam-outlet pipe connection 12. At the end of the steaming process there is typically also used water in the receiving space 11 which is relatively heavily scale-laden. In order to reduce the probability of scale deposition and microbial film formation, the used water can be sucked out, for example pumped out, by the water pipe connection 3, if necessary up to a small margin.
For descaling the evaporator 1, the descaling liquid can be conveyed, for example pumped, into the receiving space 11 via the water-through pipe connection 3 (up to the maximum level F max of the steaming process or even higher) and heated, if necessary even boiled, by the surface-heating device 6. The descaling liquid remains in the receiving space 11 for a certain residence time and is then sucked out again, for example pumped out, through the water-through-port pipe connection 3. This can be followed by one or more rinsing processes, for example with water, which can be heated by the surface heating device 6, but is not required.
Of course, the invention is not limited to the embodiments shown.
In general, the terms "a" and "an" and the like are to be understood to mean either the singular or the plural, especially in the sense of "at least one" or "one or more", unless explicitly excluded, such as by the expression "exactly one" or the like.
Numerical descriptions can also include just the numbers described as well as the usual tolerance ranges, provided that this is not explicitly excluded.
List of reference numerals:
1. Evaporator
2. Cover for a container
3. Water port pipe joint
3A first tube section
3B second tube section
4. Base member
5. Bearing area
6. Surface heating device
7. Sealing element
8. Support leg
9. Electric connector
10. Latch connection
11. Receiving space
12. Steam outlet pipe joint
13. Sensor element
14. Incision
15. Scale filter
D distance
F max maximum liquid level
Claims (10)
1. Evaporator (1) for a steam treatment appliance, having a receiving space (11) for a liquid to be evaporated by means of a surface heating device (6) on the bottom side, which is covered by a cover (2) having a steam outlet pipe connection (12) and a water through pipe connection (3), characterized in that the water through pipe connection (3) has a first pipe section (3 a) extending inside the receiving space (11), the junction of which is below a maximum level (F max) of the liquid and above the surface heating device (6).
2. Evaporator (1) according to claim 1, wherein the first tube section (3 a) has a vertical distance (d) from the surface heating device (6) of between 1mm and 5mm, in particular between 1mm and 2 mm.
3. The evaporator (1) according to any of the preceding claims, wherein the edge of the converging side of the first tube section (3 a) has a plurality of slits (14) distributed in the circumferential direction.
4. The evaporator (1) according to any of the preceding claims, wherein the first tube section (3 a) is oriented vertically.
5. The evaporator (1) according to any of the preceding claims, wherein the water through-tube connector (3) extends through a side wall of the cover (2) and has a horizontally outwardly protruding second tube section (3 b) which transitions into the first tube section (3 a).
6. The evaporator (1) according to any of the preceding claims, wherein the surface heating device (6) has at least one non-heating region and the junction of the first tube section (3 a) is arranged above the non-heating region.
7. Evaporator (1) according to claim 6, wherein the junction of the steam outlet pipe connection (12) into the receiving space (11) is arranged above the non-heating area of the surface heating device (6).
8. The evaporator (1) according to any of the preceding claims, wherein the evaporator (1) further has a scale filter (15) arranged in the receiving space (11), which scale filter is arranged laterally spaced apart from the junction of the receiving side of the steam outlet pipe connection (12).
9. Household steam treatment appliance having a cooking chamber and an evaporator (1) according to any of the preceding claims, wherein a steam outlet pipe joint (12) of the evaporator (1) is in fluid connection with the cooking chamber, and wherein the household steam treatment appliance is set up for delivering liquid into a receiving space (11) through a water through-port pipe joint (3) and out of the receiving space (11) through the water through-port pipe joint (3).
10. Household steam treatment appliance according to claim 9, wherein the household steam treatment appliance is designed to deliver cleaning liquid into the receiving space (11) through the water channel connection (3) and out of the receiving space (11) through the water channel connection (3).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021211174.2 | 2021-10-04 | ||
| DE102021211174.2A DE102021211174A1 (en) | 2021-10-04 | 2021-10-04 | Evaporator for a steam processor and household steam processor |
| PCT/EP2022/076066 WO2023057202A1 (en) | 2021-10-04 | 2022-09-20 | Evaporator for a steam treatment appliance, and domestic steam treatment appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118076834A true CN118076834A (en) | 2024-05-24 |
Family
ID=83903105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280067064.6A Pending CN118076834A (en) | 2021-10-04 | 2022-09-20 | Evaporator for a steam treatment appliance and domestic steam treatment appliance |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4413297A1 (en) |
| CN (1) | CN118076834A (en) |
| DE (1) | DE102021211174A1 (en) |
| WO (1) | WO2023057202A1 (en) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4309240A1 (en) | 1993-03-23 | 1994-09-29 | Ego Elektro Blanc & Fischer | Steam generator with an evaporating chamber |
| FR2740537B1 (en) * | 1995-10-31 | 1998-01-16 | Seb Sa | STEAM GENERATOR WITH AUTOMATIC SUPPLY AND METHOD FOR MEASURING THE LIQUID LEVEL IN SUCH A GENERATOR |
| FR2835041B1 (en) * | 2002-01-24 | 2004-03-19 | Seb Sa | DRAINING AND CLEANING KIT FOR ELECTRODOMESTIC STEAM GENERATOR |
| EP1910739B1 (en) * | 2005-07-11 | 2013-04-10 | Koninklijke Philips Electronics N.V. | Method for rinsing a boiler system for use with a steaming device |
| EP2067537A3 (en) * | 2007-05-29 | 2011-08-31 | Miele & Cie. KG | Device for creating steam in a laundry processing machine and laundry processing machine |
| DE102008022837A1 (en) * | 2008-05-08 | 2009-11-12 | Berghänel, Dietmar, Dr. Ing. | Electrically-heated evaporator for water containing lime has injection nozzle in upper third of evaporator linked to injection hose, directly above temperature regulator |
| RU2502015C2 (en) * | 2008-09-22 | 2013-12-20 | Бсх Бош Унд Сименс Хаусгерете Гмбх | Domestic appliance with filled steam reservoir and steam reservoir for domestic appliance |
| DE102009044053A1 (en) | 2009-09-18 | 2011-05-05 | Miele & Cie. Kg | Steam generator for a household appliance |
| GB201017461D0 (en) * | 2010-10-15 | 2010-12-01 | Strix Ltd | Electric steam generation |
| EP2659196B1 (en) | 2010-12-29 | 2017-06-28 | Arçelik Anonim Sirketi | A cooking device comprising a steam generator |
| DE102014203537A1 (en) | 2014-02-27 | 2015-10-01 | BSH Hausgeräte GmbH | Evaporator |
| DE102014210670A1 (en) | 2014-06-05 | 2015-12-17 | BSH Hausgeräte GmbH | Evaporator |
| DE102014210669A1 (en) | 2014-06-05 | 2015-12-17 | BSH Hausgeräte GmbH | Evaporator |
| DE102015205496A1 (en) | 2015-03-26 | 2016-09-29 | BSH Hausgeräte GmbH | Heating liquid in a household appliance |
-
2021
- 2021-10-04 DE DE102021211174.2A patent/DE102021211174A1/en active Pending
-
2022
- 2022-09-20 CN CN202280067064.6A patent/CN118076834A/en active Pending
- 2022-09-20 EP EP22793131.8A patent/EP4413297A1/en active Pending
- 2022-09-20 WO PCT/EP2022/076066 patent/WO2023057202A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021211174A1 (en) | 2023-04-06 |
| WO2023057202A1 (en) | 2023-04-13 |
| EP4413297A1 (en) | 2024-08-14 |
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