CN110850676A

CN110850676A - Household appliance with projection device

Info

Publication number: CN110850676A
Application number: CN201910763469.3A
Authority: CN
Inventors: A·韦伯; T·迈尔; D·莱沃尔德; R·施陶德; T·迪舍尔; A·凯斯勒
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2018-08-20
Filing date: 2019-08-19
Publication date: 2020-02-28
Anticipated expiration: 2039-08-19
Also published as: DE102018213979A1; CN110850676B

Abstract

The invention relates to a household appliance having a slide projector (61) which is provided for projecting a plurality of display regions (29) onto a projection surface (28). The projector (61) comprises a plurality of sub-projectors (91) arranged next to one another, which respectively project one of the display regions (29) onto a projection surface (28).

Description

Household appliance with projection device

Technical Field

The invention relates to a household appliance, in particular a household appliance having a door panel with a handle recess.

Background

DE 102010002171 a1 discloses a domestic refrigeration appliance comprising a projection device which projects an image onto a projection surface. The projection surface is, for example, part of a shelf of a domestic refrigeration appliance.

WO 2004/057636 a1 discloses a domestic appliance with a door panel, which comprises a running display. The display is provided for projecting the signal light onto the floor in front of the household appliance.

DE 202007008U 1 discloses a refrigerator and/or freezer comprising a projection device which is provided for projecting information onto a projection surface of the refrigerator and/or freezer.

Disclosure of Invention

The object of the present invention is to provide an alternative household appliance having a projection device.

The object of the invention is achieved by a household appliance having a slide projector which is provided for projecting a plurality of display regions onto a projection surface and comprises a plurality of sub-slides arranged next to one another, which respectively project one of the display regions onto the projection surface.

The household appliance according to the invention therefore comprises a projection device which is designed as a slide projector which, during operation of the household appliance, is able to project a display region onto a projection surface. The plane of projection is preferably flat. The display areas projected onto the projection surface may comprise signs, letters or symbols, respectively.

The slide projector further comprises a plurality of sub-slides and projects one of said display areas onto a projection surface, respectively.

The household appliance according to the invention is, for example, a household refrigerator, a dishwasher, a washing machine or an oven. The household appliance may comprise an electronic control device, which is connected to the slide projector, whereby the electronic control device is capable of controlling the slide projector.

The household appliance according to the present invention may comprise: an inner chamber; providing a door panel for opening and closing the interior chamber, the door panel having an inner side facing the interior chamber and an outer side facing away from the interior chamber; and a handle recess disposed in an outer side of the door panel. The handle groove includes a handle that constitutes a side recess with respect to an outer side of the door panel. The slide projector is preferably arranged at least partially in the handle, in particular integrated into said handle.

If the domestic appliance according to the invention is a domestic refrigeration appliance, the domestic refrigeration appliance comprises in particular an insulated body with an inner container which delimits an interior chamber. The interior space is a coolable interior space which can be closed by means of door panels and can be cooled by means of a refrigerating device for cooling the coolable interior space. The domestic appliance according to the invention, which is designed as a domestic refrigerator, comprises in particular an electronic control device which is provided to control the refrigerator in such a way that the cooled interior has at least approximately the desired temperature. The slide projector may be connected to an electronic control device, whereby said electronic control device is capable of controlling the slide projector.

The domestic refrigeration appliance according to the invention can be, for example, a domestic refrigeration appliance. In this case, the coolable inner chamber is cooled to a temperature of more than 0 ℃. The domestic refrigeration appliance according to the invention can also be a domestic freezer. In this case, the coolable inner chamber is cooled to a temperature of less than 0 ℃. However, the domestic refrigeration appliance according to the invention can also be a combined freezer and refrigerator appliance. The domestic refrigerator according to the invention can have exactly one coolable interior space, but also a plurality of coolable interior spaces, which can also be closed and opened in each case by means of a door leaf.

Preferably, the slide projector is at least partially arranged or integrated in a handle constituting the undercut. The handle groove comprises in particular a recess which only partially overlaps the handle and which comprises an outwardly directed surface. The surface is preferably flat. The surface preferably forms a projection surface, so that the slide projector can project the display area onto the preferably flat structured surface of the recess. Thus, the slide projector projects the display area into the grip recess. Since the slide is at least partially arranged or integrated into the handle, the slide can be arranged relatively close to the specific projection surface.

The recess of the door panel preferably comprises a covering device, which is in particular configured as an insert. The outwardly directed surface of the cover means constitutes the projection surface. The outwardly directed surface of the covering means is preferably flat. Different projection surfaces can be provided in a relatively simple manner on the basis of the covering device.

Since the display area is only projected into the handle recess when the slide is switched on, it is not visible to the operator in the switched-off state of the slide. This makes it possible to realize a display device which is not visible to the operator in the closed state.

If a cover means is used for the recess, a display means can additionally be realized, which can be combined in different materials.

The slide projector is likewise not visible to the operator due to the embodiment integrated in the handle in the appropriate case.

The projected display area is used to display, in particular, the operating state of the household appliance, for example, the temperature of the coolable interior space in the case of a household refrigerator, or also a specific function.

The slide projector of the home appliance according to the present invention preferably includes a housing, inside which the sub-slides are fixed to the housing. The housing preferably constitutes the portion of the handle forming the undercut. The slide projector can thus be fitted into a domestic appliance in a relatively simple manner. Whereby the slide projector can be assembled into a module or assembly.

The door leaf comprises a pocket in the region of the handle, which pocket is in particular designed as a rear part and in which the slide projector is fixed with its housing.

The household appliance according to the invention can thus be assembled in that the completely assembled slide projector is pushed with its housing into the pocket and the cover device is fixed in the handle recess in order to cover the recess, wherein the outwardly directed surface of the cover device forms the projection surface for the slide projector. The slide projector can be fixed in the pocket, for example, by means of a latching device.

According to a preferred variant of the household appliance according to the invention, the slides comprise light sources and the sub-slides each comprise: a collimating lens proximate the light source, the collimating lens converting light generated by the light source into a parallel beam of radiation; a slide following the respective collimating lens through which the respective radiation beam can pass; and a projection lens next to the respective slide for generating a projection beam from the beam passing through the respective slide, wherein the collimator lenses are arranged side by side, the slides are arranged side by side, and the projection lenses are arranged side by side. The light source for example comprises a plurality of LEDs, for example arranged on a printed circuit board, which LEDs correspond to the sub-slides, i.e. each sub-slide comprises one LED as light source. The projection beam is arranged to impinge on a projection surface in order to project the display area onto the projection surface. The collimating lens thereby focuses the light of the light source and directs it towards the projection lens. The structure ensures a relatively high depth definition of the slide projector at a relatively low manufacturing cost. The projection axis corresponds to a parallel beam or a projection beam, which is oriented parallel to the parallel beam.

The housing comprises in particular a first housing region forming the undercut and a second housing region arranged next to the first housing region and inside the door leaf. The second housing area preferably has a greater depth than the first housing area. The first housing region in particular corresponds to the handle or even forms the handle.

Preferably, the light source, the slide and the collimator lens are arranged within the second housing region, i.e. in a partial region of the housing arranged within the door leaf. The projection lens is preferably arranged inside the first housing region, i.e. in a partial region corresponding to the undercut or the handle. This embodiment of the slide projector can thus be arranged at least partially in the handle in a relatively space-saving manner.

The slide projector may comprise a deflection mirror next to the projection lens, which deflects the direction of the projection beam in the direction of the projection surface. The deflection mirror is preferably likewise fixed in the first housing region of the housing.

Preferably, the spacing between the collimator lens, the slide and the projection lens is selected such that the collimator lens and the slide are located in a wide section of the module, i.e. in the second housing region of the housing and thus not inside the relatively narrow handle. This may have the advantage that the display area to be projected may be large and thus errors and unsharpness of the display area may be amplified too strongly.

Preferably, the light source, the collimator lens, the slide and the projection lens are arranged inside the housing such that the projection axis of the parallel beam, starting from the collimator lens, has a directional component in the direction of the outer side of the door leaf.

According to a preferred variant of the household appliance according to the invention, the projection surface is oriented obliquely with respect to the projection axis, i.e. the projection surface is preferably oriented neither perpendicularly nor parallel with respect to the projection axis. The projection surface preferably encloses an angle of 5 ° to 45 ° with the projection axis.

In particular, it can be provided that the outwardly directed surface of the cover of the recess, which is the projection surface, is oriented obliquely to the projection axis of the parallel beam.

Preferably, the slides are oriented obliquely with respect to the respective projection axis. The slide is thus preferably not oriented perpendicularly with respect to the projection axis, but encloses an angle of 5 ° to 88 ° with said projection axis. This makes it possible to compensate for the resulting distortion of the projected display region in the case of projection planes which are not oriented perpendicular to the projection axis or in the case of deflection mirrors which are not parallel to the projection axis. The compensation is effected at least in part by the slide being oriented obliquely or obliquely with respect to the beam or projection axis, in order to increase the depth of field again and thus to effect projection onto an oblique projection surface.

In order to at least partially compensate for distortions of the projected display region caused by projection onto the inclined projection surface, the display region of the slide to be projected is preferably pre-distorted, so that the slide projector projects an image in the form of the display region onto the projection surface which is as undistorted as possible.

According to one embodiment of the household appliance according to the invention, the collimating lenses arranged side by side are combined to form a single component, and/or the slide frames of the slides arranged side by side are combined to form a single component, and/or the projection lenses arranged side by side are combined to form a single component. The component is preferably made of plastic and can be produced in a relatively simple manner by injection molding.

The number of individual components used can be reduced based on the combination. This simplifies and then shortens the assembly of the entire slide projector.

The slide includes a plurality of sub-slides, for example, 16 sub-slides. The same components are preferably connected to form a joint part and are in particular injection-molded in one piece. This mainly reduces the manufacturing costs of the projection lens and the collimator lens, which are preferably made of plastic. The larger the wall thickness, the greater the impact on the machine cost (cooling time in the tool) in terms of the price of the component. The combined structure also reduces assembly time.

The housing of the slide projector comprises preferably latch-free guides into which the collimator lens, the slide frame and the projection lens, which are each combined as separate components, are pushed without latching in order to be fixed on the housing. Due to the latch-free mounting, excessive clamping can be avoided, which ensures that the lens and the slide are oriented as accurately as possible.

In order to position/fit the associated or combined components, a guide means, for example in the form of a shaft, is preferably provided for each component in the housing, so that the component can be pushed relatively easily from above into the respective guide means or into the respective shaft. This arrangement has the advantage over an arrangement with a latching hook that the component does not have to be bent in order to be held in place. That is to say, the clamping in the housing plays a negative role in terms of tolerance behavior and thus leads to inaccuracies in the optical system.

The housing of the slide projector may include openings through which the collimating lens, the slide frame and the projection lens, respectively, combined into separate components, are accessible. A housing cover may be provided that closes the opening of the housing. The housing cover is constructed such that it presses the collimator lens, the slide mount, and the projection lens, which are respectively combined into separate members, into the guide. The housing cover can thus have a clamping device in the form of a projection. Thereby securing the member within the housing.

The surface of the housing cover facing the interior of the housing comprises a contour, for example in the form of a tab or a rib. The collimator lens, the slide mount and the projection lens combined to form the component can comprise a contour, in particular a V-shaped contour, by means of which it is possible to interact in a form-fitting manner with a contour of the housing cover in order to fix the collimator lens, the slide mount and/or the projection lens to be combined to form the component inside the housing.

In order to improve the tolerance characteristics, in particular the arrangement, all the clamping devices and/or webs used are located in the same housing half, preferably on the surface of the housing cover facing the housing interior. This can at least reduce the risk of incorrect assembly, which may be caused by incorrect assembly of the housing cover or by tolerances of the bayonet connection that may be present in the housing cover.

In order to orient the individual combined components as far as possible along a line, it is possible to use, for example, tabs formed on the housing cover. This can be achieved by means of tabs additionally molded on the components of the collimating lens or by means of contours molded onto the individual components. In the case of a V-shaped contour in particular, a corresponding mating contour is present on the housing cover in order to achieve said positioning. The variant with the tab is more accurate in terms of the orientation of the components relative to one another, for example. The disadvantage here is, for example, the relatively complex assembly. In the case of variants with a V-shaped contour, the housing can also be taken into account at the same time as the tolerances. Since the orientation/connection is here realized by the housing.

Special Poka Yoke (error proof technology) details can be molded into the housing and on the various components so that no errors are made when assembling the slide projector. Additional projections are molded together in the combined lens and on the slide mount, for example on the ends.

The housing may comprise an exit face or window through which the projection beam passes, said exit face or window being formed directly on the housing. In this case, a transition between the window and the housing without edges is realized. It is also possible to dispense with an additional seal to prevent water from being sprayed (cleaning the handle).

Preferably, the optionally present electronics of the slide projector, for example LED drivers, voltage converters, in the rear part of the housing, are arranged as widely as possible in a second housing region of the second housing region facing away from the first housing region. The risk of expansion of the components due to heat generated by the electronic device can thereby be at least reduced.

In order to improve the optical properties of the slide projector, the optical components and the housing used preferably have similar, but even fundamentally different, coefficients of thermal expansion. The housing is preferably made of ABS, and the combined components of the collimator lens, the slide mount and/or the projection lens and the optionally present window are preferably made of PMMA.

According to an embodiment of the household appliance according to the invention, the household appliance is assembled differently. If the slide projector comprises, for example, a housing, whereby in particular modules are assembled and arranged at least partially in the handle of the door panel, the modules themselves can be fitted in the back-piece of the door panel. The rear part can be integrated into the handle, for example as part of the handle, or can be mounted as a separate part on the handle on the outside or on the inside of a door panel, in particular in the form of an outer door panel.

The slide projector, which is embodied as a module, is then pushed into the rear part and, if necessary, latched. The cover device for the recess is then inserted into the handle structure and thus forms a relatively flat transition to the module and in particular covers the gap which may occur during assembly between the module and the rear part. The covering means may be made of different materials, for example wood, ceramic, glass or metal.

The activation of the slide projector can be performed, for example, by a proximity sensor of the household appliance, by the opening of a door panel, or by means of an App on a smart device. Continuous display of the mark can be realized.

The structure of the slide projector can preferably be optimized in terms of injection molding technology and in terms of simple assembly while observing relatively small tolerances. The individual components are preferably inserted into a housing, which is made in particular of plastic. Structurally preferred contours are provided on all components to ensure that the components are assembled correctly (Poka-Yoke, error and error proofing technique). A housing cover, which is placed after the internal components are assembled, secures all the components in their position.

It can be provided that the slide projector is part of a hand-operated input device of the domestic refrigeration appliance 1. In this case, the sensor device is fixed, for example, to the housing inside the housing of the slide projector. Operating parameters of the domestic refrigeration device can be input by the input device. In this case, the display area corresponds to an input area which is projected onto the projection surface by the slide projector. The sensor device is provided for detecting the approach of an object, for example a finger of an operator, or the contact of an object with an input field projected onto the projection surface 28, in order to detect an input into the input device corresponding to the respective input field.

The sensor device comprises in particular a plurality of proximity sensors, in particular infrared proximity sensors, arranged next to one another, which are in particular fixed on a printed circuit board. In particular, one of the proximity sensors corresponds to each of the sub-slides.

Drawings

An embodiment of the invention is shown schematically in the drawings. In the drawings:

fig. 1 shows a domestic refrigeration appliance having two door panels arranged side by side, which each comprise a handle recess,

figure 2 shows a front view of one of the panels,

figure 3 shows a side view of the door panel,

figure 4 shows the door panel in a perspective and partly sectional view,

figure 5 shows in a perspective and partially sectional view a partial area with a handle groove of a slide projector,

figure 6 shows a slide projector in perspective view and in cross-section,

figure 7 shows a side view of the slide projector in a cross-sectional view,

figure 8 shows a top view of the slide projector,

figure 9 shows a top view of a part of a slide projector,

figure 10 shows the casing of the slide projector in a perspective view,

figure 11 shows a partial view of the housing,

figure 12 shows a view of the cover of the housing,

figure 13 shows a partial view of the housing cover,

FIGS. 14, 15 show the lens and slide frame of the slide projector, an

Fig. 16 shows a side view of the slide projector as a schematic diagram.

Detailed Description

Fig. 1 shows a front view of a domestic refrigeration appliance 1 as an example of a domestic appliance.

The domestic refrigerator 1 has an insulated body 2 with an inner container which delimits a coolable interior 4 provided for storing foodstuffs. Inside the coolable interior 4, a shelf 5 is arranged, for example, for storing food.

The domestic refrigeration device 1 shown in fig. 1 comprises in particular two

door panels

20, 20a which are pivotably mounted relative to the body 2 and each comprise a handle recess 23. The

door panels

20, 20a are provided for closing the coolable interior 4 and are accessible in the open state. In the case of the present embodiment, the left door panel 20a is opened, and the right door panel 20 is shown closed. The right-hand door panel 20 is shown in fig. 2 as a front view, in fig. 3 as a side view and in fig. 4 as a perspective and partially sectional view.

In the case of the present exemplary embodiment, the domestic refrigeration device 1 comprises an interior chamber configured as a freezer chamber, which is arranged below a coolable interior chamber 4 which can be closed by

door panels

20, 20a and is provided with a drawer 6 which can be pulled out of the freezer chamber.

In the case of the present embodiment, the domestic refrigeration appliance 1 comprises a refrigeration device 7, in particular in the form of a refrigerant circulation system, and an electronic control device 8 which is provided for controlling the refrigeration device 7. The electronic control device is provided in particular to control the refrigerating device 7 in a manner generally known to the person skilled in the art in such a way that the refrigerated interior 4 and the freezer compartment have at least approximately a predefined or predefinable setpoint temperature. The electronic control device 8 is preferably arranged such that it regulates the temperature of the coolable interior 4 and of the freezer compartment as is known in principle to the person skilled in the art. In order to obtain the actual temperature of the coolable interior 4 and of the freezer compartment if necessary, the domestic refrigerator 1 can have temperature sensors, which are not shown in detail and are connected to the electronic control device 8. In particular, during operation of the domestic refrigeration appliance 1, the nominal temperature of the freezer compartment is less than 0 ℃ and the nominal temperature of the coolable interior 4 is greater than 0 ℃.

The

door panels

20, 20a each comprise an inner side 21 facing the coolable interior 4, an outer side 22 facing away from the coolable interior 4, and a handle recess 23 arranged in the respective outer side 22 of the

door panels

20, 20 a. Fig. 5 shows a detail of the grip recess 23 in a perspective and partially sectional view.

The handle recess 23 comprises a handle 24 which constitutes a side recess with respect to the outer side 22 of the door panel 20.

The handle recess 23 comprises in particular a recess 25 which is only partially covered by the handle 24 forming a lateral recess. In the case of the present exemplary embodiment, the recess 25 has a cover 26 in the form of an insert, which has an outwardly directed flat surface 27.

In the case of the present exemplary embodiment, the domestic refrigeration appliance 1 comprises a projection device in the form of a slide projector 61, which is able to project an image onto the projection surface 28 during operation of the domestic refrigeration appliance 1. In the case of the present embodiment, the outwardly directed flat surface 27 of the cover means 26 of the recess 25 constitutes said projection surface 28. The slide 61 is in particular at least partially integrated in the handle 24. Fig. 6 shows slide projector 61 in a perspective and sectional view, fig. 7 shows a side view of slide projector 61 in a sectional view, and fig. 8 shows a top view of slide projector 61. Fig. 9 shows a partial view of the slide projector 61 as a top view.

In the case of the present embodiment, the projected images are a plurality of display areas 29 projected onto the projection surface 28, which display areas may in turn comprise respectively signs, letters or symbols.

Slide 61 can be connected to electronic control device 8, whereby said electronic control device is able to control slide 61. The image projected on the projection surface 28 in the form of the display area 29 can correspond, for example, to the operating state, for example, the temperature of the coolable interior 4.

In the case of the present embodiment, the slide 61 includes a plurality of sub-slides 91 arranged side by side.

In the case of the present embodiment, the slide 61 includes a housing 62 inside which a sub-slide 91 is arranged on the housing 62. The housing 62 of the slide projector 61 is shown in perspective view in fig. 10. Fig. 11 shows a partial view of the housing 62.

The housing 62 of slide 61 may include an opening through which sub-slides 91 may be guided into the housing for assembly. The opening of the housing 62 is preferably closed with a housing cover 62a shown in fig. 12. The housing 62 and the housing cover 62a are made of plastic in particular. Fig. 13 shows a partial view of the housing cover 62 a.

The door panel 20 comprises, in particular in the region of the handle 24, a pocket 30, which is in particular designed as a rear part and in which the slide projector 61 is fixed with its housing 62.

The domestic refrigeration device 1 can thus be assembled in that the completely assembled slide 61 is pushed with its housing 62 into the pocket 30 and the cover 26 is fixed in the handle recess 23 in order to cover the recess 25. The slide 61 can be fixed in the pocket 30, for example, by means of a snap-in locking device.

In the case of the present exemplary embodiment, the housing 62 of the slide projector 61 comprises a first housing region 63 corresponding to the undercut of the handle 24, in particular forming the undercut, and a second housing region 64 arranged inside the door panel 20 next to the first housing region 63. The second housing region 64 has in particular a greater depth than the first housing region 63.

In particular, the sub-slide projector 91 comprises a collimator lens 65, a slide 66 next to the corresponding collimator lens 65 and a projection lens 67 next to the corresponding slide 66, respectively. Each of the sub-projectors 91 projects one of the display areas 29 onto the projection surface 28. The collimating lens 65, the slide 66 or its slide mount 66a and the projection lens 67 are shown in perspective in fig. 14 and 15.

In the case of the present embodiment, the collimator lenses 65 arranged side by side are combined into one single member 92. The projection lenses 67 arranged side by side are also combined into a single member 94, and the slide mount 66a of the slide 66 is likewise combined into a single member 93. The components 92 to 94 are made in particular of plastic and are preferably produced in an injection molding process.

The slide projector 61 comprises a light source 68, followed by a collimating lens 65. The light source 68 comprises in particular a plurality of LEDs 69, which are fixed, for example, on the printed circuit board 70. In particular, each sub-slide 91 corresponds to one of said LEDs 69, i.e. each sub-slide 91 comprises an LED 69.

Slide 61 converts the light generated by light source 68 or individual LEDs 69 into parallel beams which pass through slide 66 in order to be converted again by projection lens 67 into projection beams which each comprise information about display surface 29 to be projected.

The beams or projection beams correspond to respective projection axes 71.

In the case of the present exemplary embodiment, the light source 68 or LED69, the slide 66 and the collimating lens 65 are arranged inside the second housing area 64, i.e. in a partial area of the housing 62 of the slide projector 61 arranged inside the door leaf 20. The projection lens 67 is arranged inside the first housing region 63, i.e. in a partial region corresponding to the side recess or the handle 24.

In the case of the present embodiment, the slide projector 61 comprises a deflection mirror 72 next to the projection lens 67, which deflects the projection beam in the direction of the projection surface 28. The deflecting mirror 72 is likewise fixed in the first housing region 63 of the housing 62.

The housing 62 comprises an injection-molded window 73 through which the projection beam 71 deflected by the deflection mirror 72 passes from the housing 62.

In the case of the present exemplary embodiment, the cover device 26 and thus the projection surface 28 or the plane corresponding to the projection surface 28 are oriented obliquely with respect to the parallel beams or the projection axes 71 of said beams. The projection surface 28 or its corresponding plane preferably encloses an angle of 5 ° to 45 ° with the parallel beam or projection axis 71.

In the case of the present embodiment, the housing 62 of the slide projector 61 comprises guide means 95, 96, 97 without latching, into which the combined

components

92, 93, 94 of the collimator lens 65, the slide frame 66a and the projection lens 67 are pushed without latching in order to be fixed on the housing 62.

Furthermore, the housing cover 62a is configured such that it presses the collimating lens 65, the slide mount 66a and the projection lens 67, which are combined into the

individual components

92, 93, 94, respectively, into the

guides

95, 96, 97, thereby fixing the

components

92, 93, 94 to the housing 62. In order to press the

components

92, 93, 94 into the

guides

95, 96, 97, the surface 80 of the housing cover 62a facing the interior of the housing 62 may comprise ribs 81 shaped as hold-down means.

In the case of the present exemplary embodiment, the surface 80 of the housing cover 62a facing the interior of the housing 62 comprises structured ribs 82, and the collimating lens 65 combined to the component 92, the slide frame 66a combined to the component 93 and the projection lens 67 combined to the component 94 each comprise a contour 98, in particular a V-shaped contour, by means of which a form-fitting interaction with the structured ribs 82 is possible in order to fix the collimating lens 65, the slide frame 66a and the projection lens 67 to be combined to the components 92-94 inside the housing 62.

The ends 99, 99a of the members 92-94 that combine to form the collimating lens 65, the slide mount 66a and the projection lens 67 preferably include different profiles to ensure that the members are accurately assembled (Poka-Yoke, error proofing and error proofing techniques).

In the case of the present exemplary embodiment, the light source 68, the collimator lens 65, the slide 66 and the projection lens 67 are arranged inside the housing 62 in such a way that the beam or projection axis 71, starting from the collimator lens 65, has a directional component in the direction of the outer side 22 of the door leaf 20.

The projection surface 28 is preferably oriented obliquely with respect to the projection axis 71, whereby in the case of the present embodiment the outwardly directed surface 27 of the cover means 26 is oriented obliquely with respect to the projection axis 71 of the parallel beam, the projection surface 28 encloses an angle α of, for example, 5 ° to 45 ° with the projection axis 71, which is shown in fig. 16.

Slide 66 is preferably oriented obliquely with respect to beam or projection axis 71. slide 66 encloses an angle β of, for example, 5 ° to 88 ° with projection axis 71. the possibility is thereby achieved of compensating for the resulting distortion of the projected image in the form of display area 29 in the case of an oblique orientation of projection surface 28. said compensation is achieved at least in part by orienting slide 66 obliquely or obliquely with respect to projection axis 72 in order to increase the depth of field again and thereby achieve projection onto the oblique projection surface.

In order to at least partially compensate for the distortion of the projected image in the form of the presentation area 29 as a result of projection onto the inclined projection surface 28, the image to be projected of the slide 66 is preferably pre-distorted, so that the slide projector 61 projects an image onto the projection surface 28 which is as undistorted as possible.

In the case of the present exemplary embodiment, the sensor device 74 is arranged on the housing 62 inside the housing 62 of the slide projector 61, so that the slide projector 61, the sensor device 74 and the projection surface 28 form a hand-operated input device of the domestic refrigeration appliance 1, by means of which an operating parameter of the domestic refrigeration appliance 1, for example a setpoint temperature of the domestic refrigeration appliance, can be input. In this case, the display area 29 corresponds to an input area which is projected onto the projection surface 28 by the slide projector 61.

Sensor device 74 connected to electronic control device 8 is provided for detecting the approach of an object, for example a finger of an operator, to an input region projected on projection surface 28 or the contact of an object with said input region in order to detect an input into the input device corresponding to the respective input region.

The sensor device 74 comprises in particular a plurality of proximity sensors 75, in particular infrared proximity sensors, arranged next to one another, which are in particular fastened to a printed circuit board 78. In particular, one of the proximity sensors 75 corresponds to each of the sub-slides 91. The signal emitted by the proximity sensor 75 may in the case of the present embodiment pass through a further window 77 of the injection moulding of the housing 62.

List of reference numerals

1 domestic refrigeration appliance

2 Heat insulation body

4 refrigerated inner chamber

5 grid plate

6 drawer

7 refrigerating plant

8 electronic control device

20 door panel

20a door panel

21 inner side

22 outside

23 handle groove

24 handle

25 recess

26 covering device

27 flat surface

28 plane of projection

29 display area

30 bag groove

61 slide projector

62 casing

62a housing cover

63 first housing region

64 second housing region

65 collimating lens

66 slides

66a slide mount

67 projection lens

68 light source

69 LED

70 printed circuit board

71 projection axis

72 deflection mirror

73 window

74 sensor device

75 proximity sensor

77 additional windows

78 printed circuit board

80 surface of

81 Rib

82 structured ribs

91-son slide projector

92-94 structural member

95-97 guide device

98 profile

99, 99a ends

α angle.

Claims

1. A household appliance has a slide projector (61) which is provided for projecting a plurality of display regions (29) onto a projection surface (28) and comprises a plurality of sub-slides (91) arranged side by side, which respectively project one of the display regions (29) onto the projection surface (28).

2. Household appliance according to claim 1, characterized in that said slide projector (61) comprises a light source (68) and said sub-slides (91) respectively comprise: a collimator lens (65) next to the light source (68), which converts the light generated by the light source (68) into parallel radiation beams, respectively; a slide (66) next to the corresponding collimator lens (65), through which the corresponding radiation beam passes; and a projection lens (67) following the respective slide (66) for generating a projection beam from the beam passing through the respective slide (66), wherein the collimator lenses (65) are arranged side by side, the slides (66) are arranged side by side, and the projection lens (67) is arranged side by side.

3. The household appliance according to claim 2, wherein the collimating lenses (65) arranged side by side are combined into a single component (92), and/or the slide frames (66a) of the slides (66) arranged side by side are combined into a single component (93), and/or the projection lenses (67) arranged side by side are combined into a single component (94).

4. The household appliance according to claim 3, wherein the slide projector (61) comprises a housing (62) inside which the sub-slide projector (91) is fixed to the housing (62), and the housing (62) comprises a latch-free guide (95-97) into which the collimator lens (65), the slide frame (66a) and the projection lens (67), respectively combined into separate components (92-94), are pushed without latching to be fixed to the housing (62).

5. The household appliance according to claim 4, wherein the housing (62) comprises an opening through which the collimator lens (65), the slide frame (66a) and the projection lens (67), respectively combined into separate components (92-94), are accessible, and a housing cover (62a) is provided which closes the opening of the housing (62), wherein the housing cover (62a) is configured such that it presses the collimator lens (65), the slide frame (66a) and the projection lens (67), respectively combined into separate components (92-94), into the guide (95-97).

6. The household appliance according to claim 5, wherein a surface (80) of the housing cover (62a) facing the interior of the housing (62) comprises a contour (82), and the collimator lens (65), the slide frame (66a) and the projection lens (67) combined into the component (92-94) comprise a contour (98), in particular a V-shaped contour, by means of which a form-fitting interaction with the contour (82) of the housing cover (62a) is possible in order to fix the collimator lens (65), the slide frame (66a) and/or the projection lens (67) to be combined into the component (92-94) inside the housing (62).

7. The household appliance according to any of claims 1 to 6, characterized in that it has: an inner chamber (4); a door panel (20) for opening and closing the interior (4) is provided, said door panel having an inner side (21) facing the interior (4) and an outer side (22) facing away from the interior (4); and a handle recess (23) arranged in the outer side (22) of the door panel (20), the handle recess comprising a handle (24) constituting a side recess with respect to the outer side (22) of the door panel (20), and the slide projector (61) being arranged at least partially in the handle (24).

8. Household appliance according to claim 7,

the door panel (20) comprises a pocket (30) in the region of the handle (24), which pocket is in particular designed as a rear part and in which the slide projector (61) is fixed with its housing (62) and/or

-the housing (62) comprises a first housing region (63) forming the undercut and a second housing region (64) arranged inside the door panel (20) next to the first housing region (63), in particular having a greater depth than the first housing region (63), and/or

-the handle groove (23) has a recess (25) which only partially overlaps the handle (24), and in particular the recess (25) comprises a covering means (26), the outwardly directed surface (27) of which constitutes a projection plane (28).

9. The household appliance according to claim 8, wherein the light source (68), the slide (66) and the collimating lens (65) are arranged inside the second housing area (64) and the projection lens (67) is arranged inside the first housing area (63).

10. Method for assembling a household appliance, in particular according to any one of claims 1 to 9, having: an inner chamber (4); a door panel (20) for opening and closing the interior (4) is provided, said door panel having an inner side (21) facing the interior (4) and an outer side (22) facing away from the interior (4); and a handle groove (23) arranged in the outer side (22) of the door panel (20), the handle groove comprising a handle (24) constituting a side recess with respect to the outer side (22) of the door panel (20),

the door panel (20) comprises a pocket (30) in the region of the handle (24), which pocket is in particular designed as a rear part, and the handle groove (23) has a recess (25) which overlaps the handle (24) only in part,

and comprising a slide projector (61) which is provided for projecting a plurality of display areas (29) onto a projection surface (28) and comprises a plurality of sub-slides (91) arranged side by side, which respectively project one of the display areas (29) onto the projection surface (28), and the slide projector (61) comprising a housing (62) inside which the sub-slides (91) are fixed on the housing (62), the method having the following steps for assembling a household appliance:

-pushing the slide projector (61) with its housing (62) into the pocket (30), and

-fixing a cover device (26) in the handle recess (23) so as to cover the recess (25), wherein an outwardly directed surface (27) of the cover device (26) constitutes a projection surface (28).