ES2564760B1 - Home appliance device and procedure for manufacturing a home appliance device - Google Patents

Abstract

Home appliance device and method for manufacturing a home appliance device. # The invention relates to a home appliance device, in particular, to a cooking appliance device, with one or more substrates (10a; 10b), with one or more electrical components (12a; 12b), and with one or more conductive tracks (14a, 16a; 14b, 16b), arranged next to the substrate (10a; 10b), which are made by means of an ink (18a ; 18b) electrically conductive. # In order to improve the fixation of the electrical and / or electronic components, it is proposed that the electrical component (12a; 12b) be fixed to the substrate (10a; 10b) by means of the the conductive tracks (14a, 16a; 14b, 16b).

Description

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DOMESTIC DEVICE DEVICE AND PROCEDURE FOR THE MANUFACTURE OF A DOMESTIC DEVICE DEVICE

DESCRIPTION

The invention refers to a household appliance device according to the preamble of claim 1 and a method for manufacturing a household appliance device according to the preamble of claim 8.

From the state of the art are known cooking fields comprising a cooking field plate and a circuit, arranged next to it, with one or more conductive tracks that are made by an electrically conductive ink. The SMD components (surface mounted device) electrically connected with the conductive tracks are here fixed to the cooking field plate by means of an indirect welding joint.

The invention solves the technical problem, inter alia, of providing a generic household appliance device with better properties in relation to the fixing of electrical and / or electronic components. According to the invention, this technical problem is solved by the features of claims 1 and 8, while advantageous embodiments and improvements of the invention can be extracted from the secondary claims.

The invention refers to a household appliance device, in particular, to a cooking appliance device and, preferably, to a cooking field device, with one or more substrates, with one or more electrical and / or electronic components, and with one or several conductive tracks, arranged, in particular, applied and, preferably, printed, next to the or to the substrates, which are made by means of an electrically conductive ink, where the electrical or / or electronic components are fixed, of directly preferred, to or to the substrates by means of the conductive track (s), in particular, without welding material.

The term "cooking device" includes the concept of one or more parts, namely, a construction subgroup, of a cooking device, preferably, of a cooking field and, more preferably, of a cooking field inductively. The cooking appliance device may also comprise the entire cooking appliance, preferably the entire cooking range and, more preferably, the cooking range.

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whole induction cooking. Here, the substrate is preferably made at least essentially as a plate. The term "at least essentially plate-like" embodiment of an object includes the concept of an embodiment of the object in which an imaginary minimum parallelepiped that envelops the object tightly has a more extensive side, which is 10 or more times, preferably , 20 or more times, preferably, 30 or more times and, advantageously, 40 or more times, more extensive than the shorter side of the parallelepiped. The shorter side of the parallelepiped and / or the thickness of the substrate and / or the thickness of the substrate material amounts to 0.1 mm or more, advantageously, 0.5 mm or more, preferably 1 mm or more and, more preferably, 2 mm or more, and amounts to a maximum of 10 cm, advantageously, a maximum of 5 cm, preferably, a maximum of 2 cm and, more preferably, a maximum of 1 cm It is preferable that the substrate here has a thickness and / or thickness of at least essentially constant material. The term "at least essentially constant" material thickness and / or thickness of an object includes the concept of a thickness and / or thickness of material that differs from a thickness and / or thickness of average material across the object by at most the 5%, preferably, at most 3% and, more preferably, at most 1%. Here, the substrate could be part of a door of a household appliance, in particular, of a door of a cooking oven and / or of a microwave, and / or could be made as part of a side wall of a household appliance. However, the substrate is preferably made as a cooking field plate, in particular as an induction cooking field plate and / or as a part, in particular, as a base plate, of a cooking field plate, in particular, of an induction cooking plate. Particularly preferably, the electrical and / or electronic components and / or the conductive tracks are here arranged on a side of the substrate that is directed towards the interior of the domestic appliance in the assembled state of the domestic appliance. In the case of an embodiment of the substrate as the base plate of a cooking field plate, the electrical and / or electronic components and / or the conductive tracks are arranged next to an inner side and / or lower side of the base plate. Likewise, the electrical and / or electronic components may be configured as any electrical and / or electronic component that is appropriate to a person skilled in the art, such as, for example, a functional element, in particular, a heating element, a connection element , an actuator element and / or a lighting element, such as a sensor element, in particular a magnetic field sensor and / or temperature sensor, as an integrated circuit, as a semiconductor component, as a resistive component, as a capacitor and / or as inductive component In this context, the term "electrically conductive ink" includes the concept of a printing substance and / or ink that in a cured state is intended to form a conductive track and that, at least in the cured state, present at a temperature of 20 ° C an electrical conductivity of 0.1 106 S / m (siemens per meter) or more, advantageously, 0.7 · 106 S / m or more, preferably, 10 · 106 S / m or more and, so more preferred, from 30 · 106 S / m or more. In the uncured state, the electrically conductive ink is in suspension and may have one or more solvents, preferably ethylene glycol. The term "intended" includes the concept of specifically conceived and / or provided. The expression that an object is intended for a particular function includes the concept that the object satisfies and / or performs this particular function in one or more application and / or operating states. The expression consisting in that the electrical component (s) are fixed to or to the substrates "without welding material" includes the concept that a joint between the electrical components and the substrate does not present any welding material, in particular, a paste for weld and / or tin to weld.

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Through this embodiment, a generic household appliance device with better properties in terms of fixing electrical and / or electronic components can be provided, it being possible in particular that electrical circuits, sensing elements and / or electrical components and / or particular electronics are connected to the substrate together with the conductive tracks in an advantageously simple manner and, in particular, in a single operation. Therefore, both the complexity of the work and the costs can be advantageously reduced, and it is possible to improve the measurement accuracy and / or the positioning of a sensor element, in particular, of a temperature sensor.

Likewise, it is proposed that the home appliance device comprises another or other conductive tracks, arranged next to the or to the substrates, which are made by an electrically conductive ink, preferably by the same electrically conductive ink, preferably, in a single operation. as are the conductive tracks, and by means of which the electrical or electronic component (s) are fixed to or to the substrates, in particular, without welding material. In this way, an advantageously secure and stable connection between the substrate and the electrical components can be achieved.

If the or the conductive tracks and / or the or the other conductive tracks are in electrical contact with the electrical and / or electronic components or components, functional elements, sensor elements and / or circuits can be advantageously implemented in a simple manner. Preferably, the conductive tracks and / or the other conductive tracks are provided to connect the electrical and / or electronic components with other components, with an evaluation unit and / or with a direct and / or control unit. indirectly, through other electrical cables and / or additional conductive tracks. However, as an alternative it is also conceived that the conductive tracks and / or the other conductive tracks are predominantly provided and / or only for fixing the electrical components on the substrate.

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The or the conductive tracks and / or the or the other conductive tracks and / or the electrically conductive inks are composed partially or entirely, preferably in large or in whole, of a metal-doped material, by way of example, doped with copper and / or doped with nickel. Preferably, the conductive tracks and / or the other conductive tracks and / or the electrically conductive inks are here partially or entirely composed, preferably largely or entirely, of a material doped with silver, namely, oxide of zinc doped with silver (ZnO + Ag). The expression "in large or in whole" includes the concept of 70% or more, advantageously, 80% or more, preferably, 90% or more and, more preferably, 95% or more. The term "metal doped" includes the concept of agglutination with metal particles, preferably metal nanoparticles. In this case, the metal particles have a maximum size of 10 µm, advantageously, a maximum of 6 µm, preferably, a maximum of 4 µm and, more preferably, less than 1 µm. In this way, it can be achieved that the electrically conductive ink has a high conductivity and / or that the conductivity of the electrically conductive ink can be adapted to the specific application.

By way of example, the electrical and / or electronic components could be provided to be joined with the substrate by means of an assembly in which they pass through the substrate. However, the electrical and / or electronic components are preferably made as surface mountable components, in particular, as SMC component (surface mounted component), as SMA component (surface mounted assembly) and / or, preferably, as SMD component (surface mounted device). In this way, a fixation that does not suffer deterioration and / or preferably simple electrical and / or electronic components to the substrate can be obtained.

The substrate may be composed of any material that is appropriate to a person skilled in the art such as, for example, partially or in its entirety, preferably, largely or in its entirety and, more preferably, completely, by metal, in particular, steel, stainless steel and / or aluminum, plastic and / or a composite material. However, the substrate is advantageously composed of glass and / or

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ceramic hob partially or in its entirety, preferably, largely or in its entirety and, more preferably, completely. In this way, the electrical circuits, sensor elements and / or particular electrical components can be immediately and / or directly connected to a part of the domestic appliance, in particular, a cooking field plate, whereby the costs are they can be advantageously reduced, since additional printed circuit boards are not necessary and electrical isolation can be achieved preferably simply.

The invention also refers to a process for the manufacture of a household appliance device, in particular of a cooking appliance device and, preferably, of a cooking field device, with one or more substrates, with one or more electrical and / or electronic components, and with one or several conductive tracks, where the conductive track (s) are produced by means of an electrically conductive ink and arranged, specifically, applied and, preferably, printed, next to the or to the substrates, where the or the electrical and / or electronic components are fixed to or to the substrates by means of the conductive track (s) without welding material. In this way, the electrical circuits, sensing elements and / or particular electrical and / or electronic components can be advantageously connected to the substrate and, in particular, in a single operation, thus being able to advantageously reduce the labor cost and minimize the costs.

Likewise, it is proposed that the electrically conductive ink (s) be applied to the substrate (s) by an inkjet printing process. The term "inkjet printing process" includes the concept of a matrix printing process in which electrically conductive ink is emitted by an overpressure by one or more nozzles of a printhead to be deposited directly on the substrate at separate and / or adjacent points, preferably, at points that merge with each other. In the inkjet printing process, small droplets with a size between 1 pl and 100 pl (picoliters) are emitted, preferably between 3 pl and 80 pl and, more preferably, between 6 pl and 50 pl, which are preferably applied on selected points of a grid that have a resolution of more than 1 grid point per millimeter, preferably, more than 3 grid points per millimeter, advantageously, more than 10 grid points per millimeter and, more advantageously, more than 30 grid points per millimeter, in particular, directly on the substrate and without additional auxiliary means, such as a template. In this case, the inkjet printing process is configured differently from a screen printing process, a sputtering process, a thick layer application procedure and / or a thin layer application procedure. In this way, the conductive tracks can be applied on the substrate in an advantageously simple and / or flexible manner.

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If the electrically conductive inks are applied approximately or exactly at room temperature, the procedure can be further simplified. In this context, the expression “approximately or exactly at room temperature” includes the concept of a temperature between 5º C and 50º C, advantageously, between 10º C and 40º C, preferably, between 15º C and 30º C and, more preferably, between 20 ° C and 25 ° C. Here, the electrically conductive ink is applied partially or totally liquid, and has a viscosity between 4 Pas and 20 Pas (second pascal seconds), preferably, of between 6 Pas and 15 Pas and, more preferably, between 8 Pas and 12 Pas. In this case, the electrically conductive ink is a suspension and has one or more solvents, preferably ethylene glycol.

In a preferred embodiment of the invention, it is proposed that, prior to curing and / or drying of the electrically conductive inks or inks, the electrical and / or electronic components or components are pressed into the electrically conductive inks and partially or totally liquid. For this, the electrically conductive ink is first applied to the substrate and provided with one or more separation points that form the two or more contacts for the electrical and / or electronic components. As an alternative, it is also conceived that the electrical and / or electronic components are arranged on the substrate first and then the electrically conductive ink is applied. In this way, the assembly can be improved and / or the labor cost reduced.

Likewise, it is proposed that, after application on the substrate, the electrically conductive ink (s) be cured and / or dried, in particular, by evaporation of the solvent, for a time between 1 min and 12 min, preferably between 6 min and 10 min and, more preferably, between 7 min and 9 min, at a temperature between 150º C and 400º C, preferably between 175º C and 225º C and, more preferably, between 190º C and 210º C. As an alternative, it is conceived that, after application on the substrate, the electrically conductive ink is cured and / or dried for a time between 1 min and 7 min, preferably between 2 min and 6 min and , more preferably, between 3 min and 5 min, at a temperature between 250º C and 350º C, preferably between 275º C and 325º C and, more preferably, between 290º C and 310º C. preferred way, the electrically conductive ink is cured here in a reflux oven, although, as at thermally, it is also conceived that the conductive ink is cured by ultraviolet lighting, in a dryer and / or in any other way that is appropriate to a person skilled in the art and / or any other temperature that is appropriate to a person skilled in the art . In this way, it is possible to achieve a fixed and / or permanent bond between the electrically conductive ink, the electrical and / or electronic components and the substrate.

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Other advantages are taken from the following description of the drawing. Two embodiments of the invention are represented in the drawing. The drawing, description and claims contain numerous features in combination. The person skilled in the art will consider the characteristics advantageously also separately, and will gather them in other reasonable combinations.

They show:

Fig. 1 a domestic appliance configured as an induction cooking field with a domestic appliance device, in schematic top view,

Fig. 2 an inner side of a substrate, made as an induction cooking field plate, of the home appliance device, in enlarged view,

Fig. 3 a step of the process for manufacturing the household appliance device,

Fig. 4 next step of the procedure for manufacturing the household appliance device, and

Fig. 5 an inner side of a substrate, made as an induction cooking field plate, of another household appliance device, in enlarged view.

Figure 1 shows in schematic top view a domestic appliance 20a configured as an induction cooking field, which here comprises four heating zones 22a. In addition, the domestic appliance 20a comprises a domestic appliance device having a substrate 10a, of which an outer side 24a is shown in Fig. 1. In the present case, the substrate 10a is an induction cooking field plate, composed by ceramic hob. Likewise, the substrate 10a is made at least essentially as a plate and in the form of a parallelepiped, and has a length of

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Approximately 55 cm, a width of approximately 50 cm, and a constant thickness of 4 mm.

Figure 2 shows an inner side 26a of the substrate 10a, located opposite the outer side 24a.

The home appliance device has a first conductive track 14a and a second conductive track 16a, which are identical to each other and are made by an electrically conductive ink 18a. In the present case, the conductive tracks 14a, 16a are basically or completely composed of zinc oxide doped with silver. Alternatively, it is also conceived to produce conductive tracks from another electrically conductive ink and / or from different electrically conductive inks. The conductive tracks 14a, 16a are arranged next to the inner side 26a of the substrate 10a, on which they have been applied by an inkjet printing process. In the present case, the conductive tracks 14a, 16a have a longitudinal extension of approximately 10 cm, a transverse extension of approximately 1 mm, and a thickness between 10 μm and 500 μm, in the present case, approximately 100 μm. As an alternative, it is also conceived that one or more conductive tracks have an approximate or exactly round shape.

Also, the home appliance device has an electrical component 12a that is made as a surface mountable component. In the present case, the electrical component 12a is an SMD component (surface mounted device), in particular, an SMD resistor. The electrical component 12a is disposed on the inner side 26a of the substrate 10a, in particular, it is fixed thereto, in the present case, by the conductive tracks 14a, 16a, which are in electrical contact with the electrical component 12a. In the present case, the conductive tracks 14a, 16a are provided to connect the electrical component 12a directly with an evaluation unit (not shown). As an alternative, it is also conceived that one or more conductive tracks are provided to connect an electrical component with an evaluation unit and / or another component indirectly. Alternatively, it is conceived that a conductive track has a longitudinal extension of a few millimeters, for example, 5 mm, and acts only as a connecting element and / or fixing element between one or more electrical components and another or other components and / or one or more electrical cables and / or other or other conductive tracks, which are made differently from the conductive tracks made by an electrically conductive ink.

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Figures 3 and 4 show the steps of a process for manufacturing the domestic appliance device.

In a first step of the process, the electrically conductive ink 18a is applied by an inkjet printing process on the substrate 10a, specifically, on the inner side 26a. Here, the electrically conductive ink 18a is applied on the substrate 10a at a temperature of approximately 21 ° C. In this state, the electrically conductive ink 18a is essential or completely liquid. In the present case, the electrically conductive ink 18a is applied on the substrate 10a by an overpressure through an injector of a printhead (not shown). Also, the electrically conductive ink 18a is provided with a separation point 28a, which has a length that corresponds roughly or accurately to the electrical component 12a. The two ends 30a, 32a of the separation point 28a form here two contacts for the electrical component 12a.

The electrically conductive ink 18a is composed at least basically of zinc oxide doped with silver, whereby it presents silver particles, which are intended to increase the conductivity of the electrically conductive ink 18a and have a size of approximately 0.5 µm . The electrically conductive ink 18a has a conductivity of 40 · 106 S / m, or greater.

In the second step of the procedure (see Figure 4), the electrical component 12a is pressed into the electrically conductive ink 18a.

In the third step of the process, the electrically conductive ink 18a is cured, in the present case, in a reflux oven, at a temperature of 200 ° C for a time of 8 min, although, alternatively, the electrically conductive ink 18a also It could be cured at a temperature of 300º C for a time of 4 min. During the curing phase, a solvent evaporates from electrically conductive ink 18a. In the cured state, the electrically conductive ink 18a forms the conductive tracks 14a, 16a, whereby the electrical component 12a is fixed in this state to the substrate 10a by the conductive tracks 14a, 16a.

Another embodiment of the invention is shown in Figure 5. The following description and drawing are essentially limited to the differences between the embodiments, where, in relation to components indicated in the same way, in particular, in terms of components with the same reference symbols, it can also be basically referred to the drawing and / or the description of the other embodiment of Figures 1 to 4. For the differentiation of the examples of embodiment, the letter "a" has been postponed to the reference symbols of the embodiment of Figures 1 to 4 and In the exemplary embodiment of Figure 5, the letter "a" has been replaced by the letter "b".

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Figure 5 shows an enlarged view of an inner side 26b of a substrate 10b,

5 made as an induction cooking plate, of another household appliance device. In this case, the home appliance device has eight conductive tracks 14b, 16b identical to each other, which are made by an electrically conductive ink 18b. Also, the home appliance device has an electrical component 12b configured as an integrated circuit. The conductive tracks 14b,

10 16b are provided to connect to the electrical component 12b with contact points 34b, 36b.

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Reference symbols

10

Substrate

12

Component

14

Conductive track

16

Conductive track

18

ink

twenty

Domestic appliance

22

Heating zone

24

Outer side

26

Inner side

28

Point of separation

30

Extreme

32

Extreme

3. 4

Contact point

36

Contact point

Claims (8)

image 1 1. Home appliance device, in particular, cooking appliance device, with one or more substrates (10a; 10b), with one or more electrical components (12a; 12b), and with one or more conductive tracks (14a, 16a ; 14b, 16b), arranged 5 next to the substrate (10a; 10b), which are made by an electrically conductive ink (18a; 18b), characterized in that the electrical component (12a; 12b) is fixed to the substrate (10a; 10b) by means of the conductive track (14a, 16a; 14b, 16b).

A household appliance device according to claim 1, characterized by another or other conductive tracks (14a, 16a; 14b, 16b), arranged next to the substrate (10a; 10b), which are made by means of an ink (18a ; 18b) electrically conductive, and by which the electrical component (12a; 12b) are fixed to the substrate (10a; 10b).

3. Household appliance according to claim 1 or 2, characterized in that the conductive track (s) (14a, 16a; 14b, 16b) are in electrical contact with the electrical component (12a; 12b).

A domestic appliance device according to one of the preceding claims, characterized in that the conductive track (s) (14a, 16a; 14b, 16b) are partially or entirely composed of zinc oxide doped with silver.

A household appliance device according to one of the preceding claims, characterized in that the electrical component (12a; 12b) are made as surface mountable components.

fifteen 6. Home appliance device according to one of the claims set forth 30, characterized in that the substrate (10a; 10b) is partially or entirely composed of glass and / or ceramic and / or ceramic. 7. Domestic appliance (20a; 20b), in particular, cooking appliance, with one or more home appliance devices according to one of the preceding claims. 13 image2 8. A method for manufacturing a household appliance device, in particular a cooking appliance device, according to one of claims 1 to 6, with one or more substrates (10a; 10b), with one or more components ( 12a; 5 12b) electrical, and with one or several conductive tracks (14a, 16a; 14b, 16b), where the or the conductive tracks (14a, 16a; 14b, 16b) are produced by means of an electrically conductive ink (18a; 18b) and arranged next to the substrate (10a; 10b), characterized in that the electrical component (12a; 12b) are fixed to or to the substrates (10a; 10b) by means of the conductive track (s) (14a, 16a; 14b, 10 16b). Method according to claim 8, characterized in that the electrically conductive inks (18a; 18b) are applied to the substrate (10a, 10b) by means of an inkjet printing process. fifteen Method according to claim 8 or 9, characterized in that the electrically conductive inks (18a; 18b) are applied approximately or exactly at room temperature. Method according to one of the claims 8 to 10, characterized in that the electrical component (12a; 12b) is pressed into the electrically conductive inks (18a; 18b). 12. Method according to one of claims 8 to 11, characterized in that the o 25 electrically conductive inks (18a; 18b) are cured for a time between 1 min and 12 min at a temperature between 150º C and 400º C. 14