US20250341354A1
2025-11-06
18/651,885
2024-05-01
Smart Summary: An ice maker is designed for home use and includes a special part that shapes ice cubes. It has a system that brings liquid to this shaping part to create ice. A cooling system then sends cold fluid to the top of the shaping part to freeze the liquid. Below the shaping part, there is a container that holds the liquid needed for making ice. This setup allows for efficient and effective ice production at home. 🚀 TL;DR
The invention relates to an ice maker, in particular for a household appliance, comprising at least one moulding element which is suitable and intended for moulding an ice piece, wherein the at least one moulding element is fluidically connected to a liquid supply device, wherein at least one cooling supply device is provided, which supplies a cooled fluid to the at least one moulding element in such a way that it impinges on an upper area of the at least one moulding element along the height axis, wherein the liquid supply device comprises at least one liquid reservoir which is arranged along the height axis below the at least one moulding element.
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F25C2400/10 » CPC further
Auxiliary features or devices for producing, working or handling ice Refrigerator units
F25C2400/14 » CPC further
Auxiliary features or devices for producing, working or handling ice Water supply
F25C2600/04 » CPC further
Control issues Control means
F25C2700/14 » CPC further
Sensing or detecting of parameters; Sensors therefor Temperature of water
F25C1/24 » CPC main
Producing ice; Construction of moulds; Filling devices for moulds for refrigerators, e.g. freezing trays
The invention relates to an ice maker, in particular for a household appliance, comprising at least one moulding element which is suitable and intended for moulding an ice piece, wherein the at least one moulding element is fluidically connected to a liquid supply device.
Such household appliances are, for example, refrigeration appliances of household equipment, in particular refrigerators, freezers or the like. Such appliances often include an ice maker to provide ice pieces. By means of a liquid supply device, a liquid, usually water, is supplied to a moulding element in which the liquid then freezes. The moulding element determines the shape of the ice pieces.
In addition to the shape, the clarity of the ice piece plays a particularly important role in terms of the aesthetic impression. Currently available ice makers generally provide cloudy ice pieces. It is therefore desirable to provide ice pieces that are as clear as possible.
The object of the present invention is to provide an ice maker which overcomes the above-mentioned disadvantages. It is also the object of the invention to provide a household appliance which overcomes the above-mentioned disadvantages.
According to the invention, there is provided an ice maker, in particular for a household appliance, comprising at least one moulding element which is suitable and intended for moulding an ice piece, wherein the at least one moulding element is fluidically connected to a liquid supply device, wherein at least one cooling supply device is provided, which supplies a cooled fluid to the at least one moulding element in such a way that it impinges on an upper region, along the height axis (Z), of the at least one moulding element, wherein the liquid supply device comprises at least one cooling supply device, which supplies a cooled fluid to the at least one moulding element in such a way that it impinges on an upper area of the at least one moulding element along the height axis (Z), wherein the liquid supply device comprises at least one liquid reservoir which is arranged along the height axis (Z) below the at least one moulding element.
The household appliance is preferably a refrigeration appliance of the household equipment, for example a refrigerator, a freezer or the like.
In the following, an ice piece is understood to be the result of the transition of a liquid into the solid state of aggregation. The liquid is advantageously supplied to the moulding element via the liquid supply device. In the following, an ice piece is thus to be understood as the solid form of the liquid used. The liquid is preferably water, but can also be a mixture of water-based liquids. The ice piece produced by the ice maker is advantageously a clear ice piece or an ice piece with a clarity of greater than 90%.
By cooling the at least one moulding element, the liquid in the moulding element could freeze or change to a solid state. The at least one moulding element determines the shape of the ice piece. The ice piece can advantageously be spherical. However, other geometric shapes are also conceivable, for example cuboid, cube-shaped, ellipsoid, etc.
The at least one moulding element has an extension along a height axis (Z). In the ice maker according to the invention, the moulding element is cooled along the height axis (Z) from above. The at least one moulding element is cooled in such a way that the formation of the ice or the solid aggregate state in the moulding element takes place along the height axis (Z) from top to bottom. Furthermore, the cooling takes place in such a way that the formation of the solid aggregate state or the ice takes place in layers from top to bottom. It has been found that the cause of the formation of cloudy ice is the inclusion of certain gases in the ice. Due to the layer-by-layer formation of the ice in the at least one moulding element along a direction, in particular from top to bottom, such a gas is displaced into the underlying liquid residue during the formation of the solid aggregate state and is not included in the ice. The formed ice piece is thus essentially clear or essentially transparent.
It is advantageous that there is a residual amount of liquid along the height axis (Z) below the forming ice piece, in which any gas present can be dissolved. According to the invention, a liquid reservoir is fluidically connected to the moulding element. This ensures that even after the complete ice piece has been formed in the at least one moulding element, the residual liquid with the unwanted gas can be displaced into the reservoir. If the liquid is advantageously water, a certain residual amount of water is displaced into the reservoir, as the transition to the solid aggregate state results in an increase in volume in the at least one moulding element.
Advantageously, the increase in volume is in a range between 8% and 12%, preferably in a range between 8% and 10%.
The cooling supply device is advantageously designed in such a way that a cooled fluid acts on an upper area of the at least one moulding element. The cooled fluid is generated by a cooling device, which may be associated with the ice maker or may also be part of the household appliance. The cooled fluid is advantageously transported by convection. Preferably, a fan or the like is provided to apply a cold air flow to the at least one moulding element. Static cooling of the upper area of the at least one moulding element is thus provided. Such static cooling can ensure a slow layer-by-layer formation of the solid aggregate state.
According to a preferred embodiment, the at least one moulding element is arranged in a holding device. Advantageously, the cooling supply device is integrated into the holding device. Preferably, the cooling supply device is designed in the form of a duct so that cooled fluid, for example cooled air, passes from a cooling device to the upper area of the at least one moulding element by means of convection.
According to a further preferred embodiment, the at least one moulding element comprises an upper opening along a height axis (Z) and a lower inlet opening. Preferably, the liquid enters the at least one moulding element through the lower inlet opening. Preferably, a connecting element is arranged between the at least one liquid reservoir and the at least one moulding element. Such a connecting element can, for example, be a tubular element, a hose or the like. Advantageously, this connecting element is at least partially enclosed by a receiving section of the at least one moulding element. Thus, advantageously, the connecting element additionally represents a lower fastening of the at least one moulding element. Advantageously, the liquid passes from the at least one liquid reservoir through the connecting element into the at least one moulding element.
Preferably, the upper opening of the at least one moulding element is designed such that the ice piece can be removed from the at least one moulding element. Preferably, the upper opening and lower inlet opening are diametrically opposed.
According to a further preferred embodiment, a first heating device is provided which heats the liquid intended to enter the at least one moulding element. This has the advantage that the liquid in the liquid reservoir is never frozen and thus the residual liquid can always be forced back into the reservoir when the ice piece is formed. Furthermore, once the ice piece has been ejected, liquid can immediately be conveyed from the at least one liquid reservoir into the at least one moulding element. Advantageously, the first heating device is at least partially arranged in the at least one liquid reservoir. It would also be conceivable for the heating device to be arranged on or in a wall of the liquid reservoir. According to such an embodiment, the heating device would preferably not be in direct contact with the liquid in the liquid reservoir. Preferably, the walls have a corresponding thermal conductivity to enable the liquid to be heated.
According to a further preferred embodiment, at least one sensor device is provided by means of which the temperature of the liquid can be determined. Preferably, at least one control device is provided, which is connected to the sensor device for signalling purposes. The at least one control device may be associated with the ice maker or may also be associated with the household appliance. Preferably, the at least one control device controls or regulates the first heating device in such a way that the liquid entering the at least one moulding element has a temperature greater than 0° C.
Preferably, the first heating device is controlled or regulated by the at least one control device on the basis of the temperature data from the sensor device. Advantageously, the liquid is thus maintained at a temperature which ensures that the liquid in the liquid reservoir and in the connecting element does not freeze. For example, the liquid is thus maintained at a temperature which is in a range between 0.5° C. and 3° C., preferably in a range between 1° C. and 2° C.
According to a further preferred embodiment, the sensor device is arranged at least partially between the at least one liquid reservoir and the at least one moulding element. Preferably, the sensor device is at least partially arranged in the connecting element.
According to a further preferred embodiment, the liquid supply device comprises a pre-reservoir for the liquid. Preferably, the pre-reservoir is fluidically connected to the at least one liquid reservoir. Preferably, the pre-reservoir comprises a filling level measuring device. The level measuring device can thus be used to determine whether there is sufficient liquid in the entire liquid supply device. Thus, after the ejection of the at least one ice piece, the at least one moulding element can be filled with the liquid from the liquid supply device. This design has the advantage that the liquid in the at least one liquid reservoir or the liquid supply device is renewed after each ejection. This means that there is no old, older liquid in the ice maker. The liquid supply device is also connected to a liquid source, for example a tap.
According to a further preferred embodiment, several moulding elements are provided. Preferably, a liquid reservoir is arranged along the height axis (Z) under each of the moulding elements. Preferably, these liquid reservoirs are fluidically connected to the pre-reservoir and together form the liquid supply device.
According to a further preferred embodiment, the at least one moulding element consists of an elastic material. Preferably, at least one holding element is provided, which is arranged on the at least one moulding element or is formed by a wall element of the at least one moulding element. Preferably, the at least one holding element is non-positively and/or positively connected to at least one counter holding element of the holding device. Preferably, the non-positive and/or positive connection between the at least one holding element and the at least one counter holding element prevents upward displacement of the at least one moulding element along the height axis (Z).
Preferably, the at least one holding element is arranged along a circumference of the wall element. It is advantageous that the at least one holding element is arranged at least partially circumferentially along a circumference of the wall element. Preferably, the at least one holding element is completely circumferential along the circumference of the wall element. However, it is also conceivable that spatially separated sections of the retaining element are arranged distributed along the circumference of the wall element. Preferably, the holding element has a ring-like circumferential design and comprises a holding groove in which the counter holding element of the holding device engages.
According to a further preferred embodiment, the elastic material is also designed in such a way that it retains its elasticity even when exposed to cold temperatures, preferably down to −30° C. Furthermore, the elastic material is approved for handling foodstuffs, for example FDA compliant. Preferably, the elastic material of the at least one moulding element is a silicone.
According to a further preferred embodiment, at least one second heating device is provided, by means of which the at least one moulding element can be heated. Preferably, the at least one second heating element can be activated before and/or during dispensing of the ice piece. Such a second heating element can, for example, be a resistance wire. Alternatively, a heating fan or the like could also be provided. The second heating element can be used to release the ice piece from the at least one moulding element, thereby enabling ejection.
According to another preferred embodiment, the holding device comprises two sections that can be moved relative to each other. Preferably, a first section is arranged along the height axis (Z) below a second section. Preferably, a movement of the second section towards the first section deforms the at least one moulding element, whereby the at least one ice piece is ejected from the at least one moulding element.
A cycle for producing at least one ice piece thus initially comprises filling the liquid into the at least one moulding element. By applying the cooled fluid to the upper area of the at least one moulding element, the solid aggregate state or the ice piece is slowly formed in layers. Gas, which would cause the ice to become cloudy, is forced into the residual amount of liquid located under the ice piece. After the at least one ice piece is completely formed in the at least one moulding element, the residual amount of liquid is forced into the liquid reservoir due to the increase in volume.
The liquid in the liquid reservoir is kept at a constant temperature, which is greater than zero. This allows the residual amount of liquid to be displaced into the liquid reservoir. By moving the second section relative to the first section, the ejection of the at least one ice piece is now initiated. After the ice piece has been ejected, the at least one moulding element is filled with liquid from the at least one liquid reservoir.
The task is also solved by a household appliance comprising an ice maker according to one of the described embodiments. The household appliance can be equipped with all the features already described above in the context of the ice maker, either individually or in combination with one another, and vice versa.
The household appliance is preferably a refrigeration appliance of the household equipment, for example a refrigerator, a freezer or the like.
Further advantages, objectives and features of the present invention are explained with reference to the following descriptions of the attached figures. Similar components may have the same reference signs in the various embodiments.
FIG. 1 a sectional view of an ice maker according to one embodiment;
FIG. 2 a section from FIG. 1;
FIG. 3 a sectional view of an ice maker according to one embodiment;
FIG. 4 a sectional view of an ice maker according to one embodiment;
FIG. 5 a sectional view of an ice maker according to one embodiment;
FIG. 6 a section from FIG. 5;
FIG. 7 a sectional view of an ice maker according to one embodiment and
FIG. 8 a circuit diagram.
FIGS. 1-7 show ice maker 1, in particular for a household appliance 100, comprising at least one moulding element 2 which is suitable and intended for moulding an ice piece 3, wherein the at least one moulding element 2 is fluidically connected to a liquid supply device 4, wherein at least one cooling supply device 5 is provided, which supplies a cooled fluid to the at least one moulding element 2 in such a way that it impinges on an upper area 2a of the at least one moulding element 2 along the height axis Z, wherein the liquid supply device 4 comprises at least one liquid reservoir 6 which is arranged along the height axis Z under the at least one moulding element 2.
The ice maker 1 and the at least one moulding element 2 extend along a height axis Z, a longitudinal axis X and a width axis Y.
The ice maker 1 can be installed in a household appliance 100, for example a refrigeration appliance for household use, in particular a refrigerator, a freezer or another household appliance.
The liquid is preferably water or a water-based mixture.
The ice maker 1 can comprise any number of moulding elements 2. The number of moulding elements 2 depends on the desired number of ice pieces 3 to be prepared. In the present figures, for example, an ice maker 1 is shown which can provide four essentially spherical ice pieces 3 and thus comprises four moulding elements 2. However, this number is not to be understood as a limitation of the generality.
The at least one moulding element 2 comprises a wall element 2b which encloses a holding space 18. The holding space 18 is suitable and intended for forming an ice piece 3. The ice piece 3 can be essentially spherical or essentially in the form of an ellipsoid or essentially in the form of a polyhedron. Of course, any other shape of the ice piece 3 is conceivable. In the figures and in the following, reference is made to an essentially spherical shape of the ice piece 3 and a correspondingly designed moulding element 2. However, this is not to be understood as a limitation of the generality.
The ice maker 1 comprises a holding device 7, in which the at least one moulding element 2 is arranged. The at least one moulding element 2 further comprises a retaining element 15, which can be completely formed by the wall element 2b or can be arranged on the wall element 2b. The at least one holding element 15 is non-positively and/or positively connected to at least one counter holding element 16 of the holding device 7. In the figures, the holding element 15 is formed circumferentially along the circumference. The holding element 15 is designed as a ring-like element which comprises a circumferential holding groove 15a. The counter holding element 16, which is designed as a retaining projection, engages in this holding groove 15a. The holding element 15 is arranged essentially centrally along the extension along the height axis Z of the at least one moulding element 2.
Furthermore, a cooling supply device 5 is provided, which is integrated into the holding device 7. The cooling supply device 5 is connected to a cooling device and is suitable and intended for guiding cooled fluid, preferably cooled air, to the upper area 2a of the at least one moulding element 2. The cooled fluid is therefore preferably only applied to this upper area 2a. This ensures layer-by-layer freezing of the liquid in the at least one moulding element 2a along the height axis Z from top to bottom. Static cooling is provided. The cooled fluid, or the cooled air, is supplied to the upper area 2a of the at least one moulding element 2 by means of convection. The cooling supply device 5 thus comprises walls which guide the cooled fluid to the at least one moulding element 2 accordingly.
This ensures that the liquid in the moulding element freezes slowly enough. A certain residual amount of liquid is thus present under the forming ice piece 3. If the ice piece 3 completely fills the at least one moulding element 2, this residual amount of liquid is displaced into the at least one liquid reservoir 6, which is fluidically connected to the at least one moulding element. This displacement is particularly simple, as the ice piece 3 is formed along the height axis Z from top to bottom and the at least one liquid reservoir 6 is arranged along the height axis Z under the at least one moulding element 2. Gases that cause turbidity in the ice piece 3 remain dissolved in the residual amount of liquid during such a process. The forming ice piece 3 is thus essentially clear.
The at least one moulding element 2 is made of an elastic material and comprises an upper opening 8 along a height axis Z and a lower inlet opening 9. The at least one moulding element 2 comprises a first section, which is arranged along the height axis Z above the holding element 15. Furthermore, the at least one moulding element 2 comprises a second section, which is arranged along the height axis Z below the holding element 15. The upper opening 8 is intended and suitable for discharging the ice piece 3 after it has been completely formed. The upper opening 8 and the lower inlet opening 9 are diametrically opposed.
The lower inlet opening 9 is intended for the liquid to enter the at least one moulding element 2 via this opening. A connecting element 10 is arranged between the at least one liquid reservoir 6 and the at least one moulding element 2. The connecting element 10 is cylindrical in shape, preferably circular cylindrical in shape. The at least one moulding element 2 comprises an access section 2c. The second section of the at least one moulding element 2 merges into this access section 2c. Preferably, the access section 2c is integrally formed with the wall element 2b of the at least one moulding element 2. The access section 2c encloses the connecting element 10 in a sealing manner. Furthermore, a clip element 19 is provided, which is arranged around the access section 2c. The clip element 19 causes a pressure between the access section 2c and the connecting element 10, thereby providing a sealing closure between the at least one moulding element 2 and the connecting element 10. This can be clearly seen in FIG. 2. The connecting element 10 comprises a clearance 10a, which can accommodate liquid. From this clearance 10a, the liquid can enter the at least one moulding element 2 via the inlet opening 9.
A first heating device 11 is provided, which heats the liquid intended to enter the at least one moulding element 2. The first heating device 11 is arranged at least partially in the at least one liquid reservoir 6.
Furthermore, at least one sensor device 12 is provided, by means of which the temperature of the liquid can be determined. The sensor device 12 is arranged in the connecting element 10 and protrudes into the clearance 10a. In this clearance 10a, the sensor device 12 contacts the liquid.
Furthermore, at least one control device 13 is provided, which is connected to the sensor device 12 in terms of signalling. This is shown in FIG. 8. The control device 13 may be associated with the ice maker 1. It is also conceivable that the household appliance 100 comprises a control device 101. It is also conceivable that several control devices 13, 101 are provided, which control/regulate certain subtasks and are associated with the ice maker 1 and/or the household appliance 100. In such a case, the control devices 13, 101 would be connected to each other by signalling. FIG. 8 shows a control device 13, 101 that controls the corresponding components. However, this circuit diagram should be understood in such a way that several control devices 13, 101 can also be provided, which control different components and can be associated with the ice maker 1 and/or the household appliance 100.
The at least one control device 13, 101 controls or regulates the first heating device 11 in such a way that the liquid entering the at least one moulding element 2 has a temperature greater than 0° C. The control or regulation of the first heating device 11 by the at least one control device 13, 101 is based on the temperature data of the sensor device 12. Advantageously, the liquid is thus maintained at a temperature which ensures that the liquid in the liquid reservoir and in the connecting element does not freeze. For example, the liquid is thus maintained at a temperature which is in a range between 0.5° C. and 3° C., preferably in a range between 1° C. and 2° C.
The liquid supply device 4 comprises a pre-reservoir 20, which is fluidically connected to the at least one liquid reservoir 6. This is clearly recognisable in FIGS. 5, 6, 7 as an example. FIG. 7 shows a plate element 21 on which four liquid reservoirs 6 are arranged. The liquid reservoirs 6 are hollow cylindrical in shape and preferably have a circular base. The liquid reservoirs 6 are each covered by a first section 7a of the holding device 7. The connecting elements 10 are arranged in the respective first sections 7a of the holding device 7.
Each liquid reservoir 6 comprises a first heating device 11, which is in the form of heating wires. The liquid reservoirs 6 have a wall with openings through which the heating wires can be passed. It is also conceivable that the heating wires are arranged on the outside of the walls of the liquid reservoirs 6. Preferably, the walls have a corresponding thermal conductivity to enable the liquid to be heated.
The four liquid reservoirs 6 are fluidically connected to a central distributor element 22. The distributor element 22 has a channel-like design and is arranged on the plate element 21. In the present embodiment, two liquid reservoirs 6 are arranged opposite each other along the longitudinal axis X. Similarly, two liquid reservoirs 6 are arranged opposite each other along the width axis Y. A first in-line arrangement of two liquid reservoirs 6 can thus be defined, which are opposite each other along the longitudinal axis X. Furthermore, a second in-line arrangement of two liquid reservoirs 6, which are opposite each other along the longitudinal axis X, can be defined. The distributor element 22 is arranged along the width axis Y centrally between the first in-line arrangement of two liquid reservoirs 6a and the second in-line arrangement of two liquid reservoirs 6. The distributor element 22 is fluidly connected to each of the four liquid reservoirs 6. It will be understood that the present number of liquid reservoirs 6 is intended to be exemplary. Of course, more or fewer liquid reservoirs 6 may be provided. The number of liquid reservoirs 6 corresponds to the number of moulding elements. The distributor element 22 may further be designed such that it is fluidically connected to more or less than four liquid reservoirs 6.
The distributor element 22 is fluidically connected to the pre-reservoir 20. The pre-reservoir 20 is tubular in shape and extends upwards along the height axis Z starting from the distributor element 22. The first heating device 11 comprises a section which is arranged on the pre-reservoir 20. This section of the first heating device 11 is designed as at least one heating wire, which winds around the pre-reservoir 20. This is clearly visible in FIG. 6. The liquid in the pre-reservoir 20 can thus also be heated so that it does not freeze.
The pre-reservoir 20 comprises a filling level measuring device 14 for determining a filling level in the liquid supply device 4. The filling level measuring device 14 comprises a floating element 23, which is equipped with a magnetic element and floats on the surface of the liquid in the pre- reservoir 20. The filling level measuring device 14 also comprises at least one detection unit 24, which is preferably a Hall sensor or a Hall switch. The Hall sensor can be arranged on a printed circuit board. The detection unit 24 is arranged laterally in an upper region of the pre-reservoir 20. Preferably, the at least one detection unit 24 is arranged on or in a wall of the pre-reservoir 20. It is also conceivable that several detection units 24 are arranged at different heights. The filling level measuring device 14 is also connected to the control device 13, 101 in terms of signalling.
Furthermore, a pumping device 28 can be provided, which pumps the liquid from a liquid source to the liquid supply device 4. The pumping device 28 pressurises the liquid in the liquid supply device 4 so that the liquid passes from the pre-reservoir 20, to the distributor element 22, into the at least one liquid reservoir 6 and finally via the at least one connecting element 10 into the at least one moulding element 2. The pumping device 28 can be controlled by the control device 13, 101.
The at least one moulding element 2 comprises an inlet opening 9. The liquid, which is usually water, enters the at least one moulding element 2 through this inlet opening 9. The inlet opening 9 is diametrically opposite the upper opening 8. As already explained, the at least one moulding element 2 extends along the height axis Z. The inlet opening 9 is arranged along the height axis Z below the upper opening 8. The filling of the at least one moulding element 2 with the liquid takes place along the height axis Z. The at least one moulding element 2 is completely filled with liquid, i.e. up to the upper opening 8. After filling, the liquid freezes, i.e. the liquid changes to a solid state.
FIGS. 3 and 4 illustrate the ejection of an ice piece 3. For this purpose, the holding device 7 comprises two sections 7a, 7b that can be moved relative to each other. A first section 7a is arranged along the height axis Z below a second section 7b. By moving the second section 7b relative to the first section 7a, the at least one moulding element 2 is deformed. The second section 7b comprises the counter-holding element 16. Due to the engagement of the counter-holding element 16 in the holding element 15 and the fixing of the at least one moulding element 2 to the first section 7a via the connecting element 10, the at least one moulding element 2 is deformed in such a way that the at least one ice piece can emerge from the at least one moulding element 2 along the height axis Z through the upper opening 8. As a result of this deformation of the at least one moulding element 2, the at least one ice piece 3 is ejected from the at least one moulding element 2 through the upper opening 8. A corresponding arrow 25 is shown in FIG. 4, which is intended to represent the ejection of the at least one ice piece 3.
In order to be able to move the second section 7b relative to the first section 7a along the height axis Z, a drive unit 26 is provided. This drive unit 26 can, for example, be an electric spindle drive with a spindle 27 and a motor. However, other drives are also conceivable, for example a pneumatic or hydraulic drive. FIG. 3 shows a state in which the second section 7b is displaced towards the first section 7a. FIG. 4 shows a state in which the second section 7b is displaced away from the first section 7a.
The elastic material of the at least one moulding element 2 must therefore be designed in such a way that it has sufficient elasticity or stiffness to allow the moulding element 2 to return to its original shape. Furthermore, the elastic material must retain such elasticity even when exposed to cold temperatures, preferably down to −30° C. Finally, the elastic material must be approved for use with foodstuffs.
Furthermore, at least one second heating device 17 is provided, by means of which the at least one moulding element 2 can be heated. This is shown in FIG. 3. In this figure, the moulding elements 2 are shown in a deformed state. Such a heating element 17 can, for example, be a resistance wire, a fan heater or the like. The at least one heating element 17 can be activated before and/or during dispensing of the ice piece 3. Preferably, the heating element 17 is activated shortly before ejection in order to detach the ice piece 3 from the at least one moulding element 2 and enable easy ejection.
The applicant reserves the right to claim all features disclosed in the application documents as being essential to the invention, provided that they are new compared to the prior art, either individually or in combination. It should also be noted that the individual figures also describe features which may be advantageous in themselves. The skilled person immediately recognises that a particular feature described in a figure can also be advantageous without the adoption of further features from this figure. Furthermore, the skilled person recognises that advantages can also result from a combination of several features shown in individual figures or in different figures.
1. An ice maker, in particular for a household appliance, comprising:
at least one moulding element, which is suitable and intended for moulding an ice piece, wherein the at least one moulding element is fluidically connected to a liquid supply device, wherein at least one cooling supply device is provided, which supplies a cooled fluid to the at least one moulding element in such a way that it impinges on an upper area of the at least one moulding element along the height axis (Z), wherein the liquid supply device comprises at least one liquid reservoir, which is arranged along the height axis (Z) under the at least one moulding element.
2. The ice maker according to claim 1,
wherein the at least one moulding element is arranged in a holding device, wherein the cooling supply device is integrated into the holding device.
3. The ice maker according to claim 1,
wherein the at least one moulding element comprises an upper opening along the height axis (Z) and a lower inlet opening, wherein the liquid enters the at least one moulding element through the lower inlet opening, wherein a connecting element is arranged between the at least one liquid reservoir and the at least one moulding element, wherein the upper opening is designed such that the ice piece can be removed from the at least one moulding element, wherein the upper opening and the lower inlet opening are diametrically opposed.
4. The ice maker according to claim 1,
wherein a first heating device is provided, which heats the liquid intended to enter the at least one moulding element, wherein the first heating device is arranged at least partially in the at least one liquid reservoir or on a wall of the liquid reservoir.
5. The ice maker according to claim 1,
wherein at least one sensor device is provided, by means of which the temperature of the liquid can be determined, at least one control device being provided, which is connected to the sensor device in terms of signalling, and controls or regulates the first heating device in such a way that the liquid entering the at least one moulding element has a temperature greater than 0° C.
6. The ice maker according to claim 5,
wherein the sensor device is arranged between the at least one liquid reservoir and the at least one moulding element, the sensor device being arranged at least partially in the connecting element.
7. The ice maker according to claim 1,
wherein the liquid supply device comprises a pre-reservoir which is fluidically connected to the at least one liquid reservoir, wherein the pre-reservoir comprises a filling level measuring device.
8. The ice maker according to claim 1,
wherein the at least one moulding element consists of an elastic material, wherein at least one holding element is provided, which is arranged on the at least one moulding element or is formed by a wall element of the at least one moulding element, wherein the at least one holding element is connected to at least one counter holding element of the holding device in a non-positive and/or positive manner.
9. The ice maker according to claim 1,
wherein at least one second heating device is provided, by means of which the at least one moulding element can be heated.
10. The ice maker according to claim 1,
wherein the holding device comprises two sections movable relative to each other, wherein a first section is arranged along the height axis below a second section, wherein a movement of the second section towards the first section deforms the at least one moulding element, whereby the at least one ice piece is ejected from the at least one moulding element.
11. A household appliance comprising an ice maker according to claim 1.