DE102014222112A1 - Household appliance and method for manufacturing the household appliance - Google Patents

Abstract

The invention relates to a household appliance (1) comprising an electric motor (25), a power electronics (26) provided with electrical energy for the operation of the electric motor (25) for supplying the electric motor (25) and power electronics (26). Having with the electric motor (25) connecting electrical cable (30). The electric cable (30) comprises a plurality of insulated wires (31) provided for supplying the electric motor (25) with the electric power for the operation of the electric motor (25), a metallized one covering the insulated wires (31) as a whole Film (32), and a metallized film (32) sheathing cable sheath (33) having a length l comprises.

Description

The invention relates to a household appliance, in particular a household refrigerator. The invention also relates to a method for producing the household appliance.

Domestic appliances, in particular household refrigerators, may have an electric motor, which is supplied with electrical energy by means of an electric cable for operation. In a domestic refrigeration appliance, the compressor of a refrigerant circuit provided for cooling a coolable interior of the domestic refrigerator includes the electric motor.

The object of the present invention is to provide an interference-proof household appliance.

The object of the invention is achieved by a household appliance, comprising an electric motor, a provided for supplying the electric motor with electrical energy for the operation of the electric motor power electronics and the power electronics with the electric motor connecting electrical cable, which several insulated wires, the for supplying the electric motor with the electrical energy for the operation of the electric motor are provided, a metallized film covering the insulated wires as a whole, and a cable sheath of length l enclosing the metallized film.

The household appliance according to the invention is preferably a household refrigerating appliance, which comprises a heat-insulated inner container with a refrigerated interior intended for storing food and a refrigerant circuit provided for cooling the coolable interior with a compressor, the compressor having the electric motor.

Thus, the invention relates in particular to a domestic refrigeration appliance, comprising a thermally insulated inner container with a refrigerated interior intended for storing food, a refrigerant circuit provided for cooling the coolable interior, which has a compressor with an electric motor, one for supplying the electric motor of the compressor with electric Energy for the operation of the electric motor provided power electronics and the power electronics with the electric motor connecting electrical cable, which are several insulated wires, which are provided to supply the electric motor with the electrical energy for the operation of the electric motor, the insulated wires as Whole sheathing metallized film, and a metallized film sheathing cable sheath having a length l comprises.

Trained as household refrigeration appliance according to the invention domestic appliance comprises the heat-insulated inner container, which limits the coolable interior. The coolable interior is intended for storing food and is cooled by means of the refrigerant circuit.

The coolable interior can preferably be closed by means of a door leaf. The door leaf is preferably pivotally mounted with respect to an axis which preferably extends vertically. When open, the coolable interior is accessible.

The household appliance according to the invention designed as a domestic refrigerator is preferably a household refrigerator. In this case, the coolable interior is cooled to temperatures greater than 0 ° C. The home appliance designed according to the invention as a household refrigerator can also be a household freezer. In this case, the coolable interior is cooled to temperatures less than 0 ° C. However, the household appliance according to the invention designed as a household refrigerating appliance can also be a freezer-refrigerated combination. Trained as household refrigeration appliance according to the invention domestic appliance can have exactly a coolable interior, but also several coolable interiors, which can also be closed and opened by means of a respective door leaf.

Trained as household refrigeration appliance according to the invention domestic appliance can also be designed as a wine refrigerator, which is provided to store with drinkable liquid, especially wine, filled bottles. In this case, the door panel is preferably at least partially transparent, e.g. at least partially made of glass.

The household appliance according to the invention designed as a household refrigerator is preferably a no-frost domestic refrigerator.

The household appliance according to the invention comprises the electric motor. This is in particular an electric three-phase motor, in particular a three-phase synchronous motor, which is preferably designed as a brushless three-phase synchronous motor. The electric motor may e.g. also be a single-phase asynchronous motor or a linear motor.

The household appliance according to the invention also has the power electronics, which provides or generates an electrical voltage provided for the electric motor during operation of the household appliance and / or an electric current intended for the electric motor. The power electronics preferably comprises an inverter or is designed as an inverter. The power electronics can also have a phase control. The phase control can be preferably used in the use of the single-phase asynchronous motor as an electric motor.

Preferably, the household appliance according to the invention is set up to operate the electric motor at different speeds. This can e.g. relatively easy to run by means of trained as an inverter power electronics. In particular, the power electronics and the electric motor can form a variable-speed electric drive.

The household appliance according to the invention further comprises the electrical cable connecting the power electronics with the electric motor. This includes a plurality of insulated wires, which are provided for supplying the electric motor with the electrical energy for the operation of the electric motor. The insulated wires can be insulated wires. However, the insulated wires are preferably formed as insulated strands. Insulated strands can be laid more flexibly than insulated wires.

The insulated wires are sheathed with the metallized foil, which in turn is sheathed with the cable sheath. The cable sheath is in particular made of an electrically insulating material, e.g. Plastic, made. The metallized film, which is preferably a metallically coated plastic film or a metal foil, serves as a shielding of the electrical cable. Such a shielding may be necessary in particular if the power electronics has the inverter and / or the phase-angle control, since thereby the electric current flowing through the insulated wires can have relatively high-frequency components. The high-frequency components of the electric current can, if no suitable countermeasures are taken, lead to unfavorable disturbances. Due to the metallized film results in a relatively inexpensive shielding and therefore reducing the interference.

In particular, the electrical cable comprises the region of the length l, in which the metallized foil and the cable jacket encase the insulated wires. The ends of the electrical cable, which connect to the region of length l, are in particular stripped from the cable sheath.

Preferably, the cable sheath and the metallized film are connected to each other such that when stripping the cable sheath at one of the two ends of the electric cable, the metallized film on the Abisolierstelle formed by Abisoilieren with tears off. This can e.g. be achieved in that the metallized film adheres to the insulated wires facing surface of the cable sheath and / or is integrated into the cable sheath. Tearing off the metallized film with the stripping of the cable sheath has a faster production of the household appliance result.

For an improved shielding of the electrical cable and / or for a protective ground, this preferably has a grounding core, which is covered with the insulated wires of the metallized film. In addition to the insulated wires runs according to this variant of the household appliance according to the invention, the grounding wire within the metallized film and within the cable sheath. The grounding wire may be implemented as a grounding wire. Because of its improved flexibility, the grounding wire is preferably a grounding strand.

For improved shielding, the grounding wire is preferably electrically conductively connected to the metallized foil, in particular over the entire length l of the cable sheath.

For improved shielding, the earth core may be grounded at least in the region of one of the two ends of the electric cable, but preferably in the region of both ends of the electric cable.

The household appliance according to the invention may have a functional grounding and / or a protective grounding. For grounding the grounding wire, the grounding wire is then preferably connected on both sides with the functional grounding or the protective grounding. Thus, the metallized film is grounded via the grounding wire, in particular electrically connected to the functional ground or the protective ground of the household appliance. Preferably, the electric motor or the compressor is grounded via the grounding wire, in particular electrically connected to the functional grounding or the protective earthing.

At least one of the ends of the grounding wire can be provided by means of additional electrical insulation. The electrical insulation is e.g. a shrink tube, an insulating sleeve or an insulating tape. The electrical insulation is preferably yellow / green.

Depending on the embodiment of the household appliance according to the invention, a shielded cable preferably results between a compressor and the power electronics.

Depending on the embodiment of the household appliance according to the invention, a shielding of the connection between the power electronics and the electric motor is realized by the metallized film, in particular by a metallized film integrated into the cable jacket. This is especially in the compressor of the home appliance designed as a household appliance, since the electrical cable to the compressor in the household refrigerator can be installed permanently.

The shield foil formed as a metallized foil is preferably a metallically coated plastic foil or a thin metal foil. Preferably, the sheathed line, i. the cable sheath made so that the cable sheath and the metallized film are connected together so that when stripping the cable sheath, the metallized film is torn at the stripping point when removing the cable sheath with.

Preferably, therefore, a sheathed cable for the insulated wires and the uninsulated, preferably designed as a twisted grounding wire grounding wire, which is within the cable sheath in electrical contact with the metallized film.

The grounding wire is preferably used both for the grounding of the electric motor or the compressor and for the functional earth of the shield, i. used the metallized film.

Optionally, after stripping the cable sheath and the metallized film, the grounding wire is exposed and it can without further steps, as in the unshielded electrical cable, optionally plug for grounding the electric motor or the compressor both on the power electronics end facing as well as on the the electric motor or the compressor facing the end of the electric cable are struck. Optionally, the uninsulated grounding wire can be provided with electrical insulation on one or both sides.

Due to the metallized foil and possibly the grounding wire, filter measures for the power electronics may possibly be reduced.

Depending on the embodiment of the household appliance according to the invention, the uninsulated grounding core has a double function and can preferably be used both for safety grounding and as functional earth for the metallized foil.

In addition, it is possible to provide the electrical cable with the same number of wires and thus with the same amount of copper as unshielded electrical cables. The shield in the form of the metallized film, which can be preferably used by a fixed installation of the electric cable in the household appliance, may have the following advantages:
The metallized film is relatively inexpensive, since it consists for example of a metal-coated plastic film. The metallized film can be fully automatically introduced in the production of the cable sheath, especially with relatively little time overhead. The process parameters can be adjusted in the manufacture of the electrical cable so that the metallized film connects to the cable sheath to allow demolished at later stripping of the cable sheath, the metallized film at the stripping of the cable sheath with. Thus, it is possible that the material use and the production cost of the electrical cable if, then only slightly higher, than for unshielded electrical cable.

• – Bereitstellen des elektrischen Kabels, welches die isolierten Adern, die Erdungsader, die metallisierte Folie, die die isolierten Adern und die Erdungsader ummantelt, und den Kabelmantel, der die metallisierte Folie ummantelt, aufweist,
• – Abisolieren des Kabelmantel an beiden Enden des elektrischen Kabels an Abisolierstellen, wobei vorzugsweise die metallisierte Folie beim Abisolieren an den Abisolierstelle mit abgerissen wird,
• – gegebenenfalls Kürzen der isolierten Adern und der Erdungsader auf die gewünschten Längen,
• – Abisolieren der isolierten Adern an beiden Enden des elektrischen Kabels,
• – gegebenenfalls Befestigen von Anschlussvorrichtungen, insbesondere von Steckern an den isolierten Adern und gegebenenfalls an der Erdungsader, insbesondere an beiden Seiten des elektrischen Kabels,
• – gegebenenfalls Überziehen der Enden der Erdungsader mit einer elektrischen Isolierung, und
• – Anschließen der isolierten Adern an die Leistungselektronik und an den elektrischen Motor und Erden der Erdungsader vorzugsweise mit beiden Enden der Erdungsader und insbesondere Erden des elektrischen Motors mittels der Erdungsader.

Depending on the embodiment of the household appliance according to the invention, this can be produced as follows:

• Providing the electrical cable comprising the insulated wires, the grounding wire, the metallized foil covering the insulated wires and the earth wire, and the cable sheath sheathing the metallized foil;
• Stripping the cable sheath at both ends of the electric cable at stripping points, wherein preferably the metallized foil is torn off during stripping at the stripping point,
• - if necessary, shortening the insulated wires and the grounding wire to the desired lengths,
• Stripping the insulated wires at both ends of the electric cable,
• If appropriate, fastening of connecting devices, in particular of plugs to the insulated wires and optionally to the earth wire, in particular on both sides of the electric cable,
• - if necessary, covering the ends of the grounding wire with electrical insulation, and
• - Connecting the insulated wires to the power electronics and to the electric motor and ground of the grounding wire preferably with both ends of the grounding wire and in particular earth of the electric motor by means of the earth wire.

By a suitable guidance of the electrical cable and the grounding wire can be dispensed with an additional insulation of the ends of the grounding wire.

An embodiment of the invention is illustrated by way of example in the accompanying schematic drawings. Show it:

1 a domestic refrigerator in a perspective view,

2 a refrigerant circuit of the household refrigerator having a compressor, and a power electronics provided for driving the compressor,

3 an electrical cable connecting the power electronics to the compressor, and

4 a cross section of the electric cable.

The 1 shows a perspective view of a household refrigerator 1 , which is a thermally insulated body 9 with a thermally insulated inner container 2 Includes a coolable interior 3 limited. The coolable interior 3 is intended for storage of food not shown.

The household refrigerator 1 has in the case of the present embodiment, a pivoting door leaf 4 to close the coolable interior 3 on. The door leaf 4 is pivotally mounted in particular with respect to a vertically extending axis. With the door open 4 , like in the 1 shown is the coolable interior 3 accessible.

On the towards coolable interior 3 directed side of the door leaf 4 are in the case of the present embodiment, several door racks 5 arranged for storing food. In the coolable interior 3 are in particular several shelves 6 arranged for storing food and in the lower part of the coolable interior 3 is in particular a drawer 7 arranged, in which also food can be stored.

The household refrigerator 1 Eg is a household refrigerator and / or can be designed as a so-called no-frost household refrigeration appliance. In this case, the foods are preferably bottles filled with wine or another drinkable liquid. The household refrigerator 1 can also be a fridge-freezer. The household refrigerator 1 can also be designed as a so-called wine refrigerator The door leaf 4 is preferably at least partially transparent in this case. It is for example at least partially made of glass. In this case, it is preferably provided that on the door leaf 4 no door racks 5 are arranged.

The household refrigerator 1 includes one in the 2 shown refrigerant circuit 20 for cooling the coolable interior 3 , In the case of the present embodiment, the refrigerant circuit comprises 20 the coolable interior 3 a compressor 21 , one to the compressor 21 downstream condenser 22 , one to the liquefier 22 downstream throttle device 23 , which is designed in particular as a throttle or capillary tube, and an evaporator 24 that is between the throttle device 23 and the compressor 21 is arranged. The compressor 21 is preferably within a machine room of the household refrigerator 1 arranged, in particular, behind the drawer 7 located. The poet 21 includes an electric motor 25 ,

The electric engine 25 of the compressor 21 is in particular a three-phase motor, preferably a three-phase synchronous motor. The three-phase synchronous motor is preferably a three-phase brushless synchronous motor. The compressor 21 but can also be a linear compressor with a linear drive. The electric engine 25 For example, it can also be a one-phase asynchronous motor.

The compressor 21 or its electric motor 25 is in the case of the present embodiment of a power electronics 26 driven. The power electronics 26 Eg is an inverter, which is a three-phase or single-phase voltage for the operation of the compressor 21 provides. The power electronics 26 may also include a phase control. The household refrigerator 1 is thus generally a household appliance, which includes an electric motor and the electric motor driving power electronics.

The household refrigerator 1 includes in the case of the present embodiment, an electronic control device 8th that is set up, the power electronics 26 to drive so that the compressor 21 or its electric motor 25 is controlled such that the coolable interior 3 at least approximately has a predetermined or predetermined target temperature. The electronic control device 8th is preferably adapted to the temperature of the coolable interior 3 regulates. If necessary, the actual temperature of the coolable interior 3 to get the household refrigeration appliance 1 at least one not shown and with the electronic control device 8th having associated temperature sensor.

Preferably, the compressor 21 or its electric motor 25 be operated at different speeds. The power electronics 26 and the compressor 21 or its electric motor 25 represent an electric drive. This electric drive can also be a regulated, in particular a variable speed electric drive.

The power electronics 26 is preferably controlled pulse width modulated.

The power electronics 26 and the compressor 21 or its electric motor 25 are with one in the 3 and 4 shown in more detail electrical cable 30 connected. The 3 shows a schematic representation of the electrical cable 30 and the 4 shows a cross section of the electric cable 30 ,

The electric cable 30 includes in the case of the present embodiment, a plurality of insulated wires 31 , which is responsible for the electrical connection between the power electronics 26 and the electric motor 25 of the compressor 21 are provided. Through the wires of the insulated wires 31 flows for the operation of the compressor 21 or its electric motor 25 required electrical power.

The isolated wires 31 can be insulated wires. Preferably, the insulated wires 31 however, insulated strands, especially twisted insulated strands.

In the case of the compressor comprising the three-phase motor 21 are in particular exactly three isolated wires 31 intended. In the case of a linear compressor as a compressor 21 are in particular exactly two isolated wires 31 intended.

The electric cable 30 further includes one of the insulated wires 31 in the longitudinal direction sheathing metallized film 32 , which serve as shielding of the insulated wires 31 is provided. The metallized foil 32 is preferably a metal-coated plastic film or a relatively thin plastic film. The metallized foil 32 encapsulates all isolated wires 31 as a whole.

The electric cable 30 further comprises a cable sheath 33 , which is made of an electrically insulating material, such as plastic, and the metallized film 32 jacketed. Preferably, the cable sheath 33 and the metallized foil 32 connected in such a way that when stripping the cable sheath 33 at one of the two ends 40 of the electric cable 30 the metallized foil 32 at the stripping point formed by the Abisoilieren with tears off. This can be achieved, for example, by the metallized foil 32 on the isolated wires 31 facing surface of the cable sheath 33 adheres and / or in the cable sheath 33 is integrated.

The electric cable 30 is at both ends 40 from the cable sheath 39 stripped and thus includes a through the cable sheath 31 and the metallized film 32 jacketed area 39 the length l, to the cable sheath 33 stripped ends 40 of the electric cable 30 adjoin.

The electric cable 30 still includes a grounding wire 34 , The grounding wire 34 is eg a grounding wire. The grounding wire 34 is preferably a ground wire, which is in particular twisted. The grounding wire 34 is unlike the isolated wires 31 as such, not individually electrically isolated. The grounding wire 34 is electrically conductive with the metallized film 32 connected. Preferably, the metallized foil contacts 32 the grounding wire 34 preferably over the entire length l of the cable jacket 31 covered area 39 of the electric cable 30 , At the ends 40 of the electric cable 30 is thus the grounding wire 34 also from the cable sheath 33 stripped.

As already stated, the insulated wires connect 31 of the electric cable 30 the power electronics 26 with the electric motor 25 of the compressor 21 ,

The ends of the insulated wires 31 are stripped of their individual insulations and can connect directly to electrical motor connections 25 or with connections of the power electronics 26 be connected. In the case of the present embodiment, the stripped ends of the insulated wires 31 with connecting devices, in particular in the form of plugs 36 connected, by means of which the corresponding ends of the insulated wires 31 with the power electronics 26 or the electric motor 25 electrically contacted.

At least one of the two ends of the ground wire 35 is grounded, in particular by a functional earthing, preferably with a protective earthing of the household refrigerator 1 connected is. Preferably, both ends of the grounding wire 35 grounded by placing both ends of the ground wire 34 in particular, in particular with the functional ground, preferably with the protective earthing of the household refrigerator 1 connected is. The ends of the grounding wire 34 are preferably each with a connection device, in particular in the form of plug 37 connected by means of which the ends of the ground wire 34 are grounded. Also the electric engine 25 or the compressor 21 can by means of the grounding wire 34 be grounded.

At least one of the ends of the ground wire 34 can by means of an additional electrical insulation 38 be isolated. The electrical insulation 38 is for example a shrink tube, an insulating sleeve or an insulating tape. The electrical insulation 38 is preferably yellow / green.

The electric cable 30 can do the following in the household refrigerator 1 to be assembled:
First, the electrical cable 30 provided. The electric cable 30 is not yet at its two ends of the cable sheath 33 stripped.

Now the cable sheath 33 at both ends 40 stripped. Preferably, the metallized film 32 when stripping the cable sheath 33 at the stripping with demolished.

Thereafter, if necessary, the ends of the insulated wires and the ends of the ground wire can be shortened to the desired lengths. After that, the insulated wires 31 on both ends of the electric cable 30 stripped and in the case of the present embodiment with the plugs 36 Mistake. The earth wire is also connected to the plugs 37 Mistake.

The insulated wires are connected 31 with their sticks 36 to the power electronics 26 and to the electric motor 25 connected. The grounding wire 34 is preferably grounded with both ends and in particular the electric motor 25 or the compressor 21 by means of the grounding wire 34 grounded.

LIST OF REFERENCE NUMBERS

1

 Household refrigerator

2

 inner container

3

 coolable interior

4

 door leaf

5

 door racks

6

 shelves

7

 drawer

8th

 electronic control device

9

 corpus

20

 Refrigerant circulation

21

 compressor

22

 condenser

23

 throttling device

24

 Evaporator

25

 electric motor

26

 power electronics

30

 electrical cable

31

 isolated wires

32

 metallized foil

33

 cable sheath

34

 grounding wire

35

 grounding wire

36, 37

 plug

38

 electrical insulation

39

 Area

40

 end up

l

 length

Claims (11)

Household appliance, having an electric motor ( 25 ), one for supplying the electric motor ( 25 ) with electrical energy for the operation of the electric motor ( 25 ) provided power electronics ( 26 ) and a the power electronics ( 26 ) with the electric motor ( 25 ) connecting electrical cable ( 30 ), which has several isolated wires ( 31 ) used to power the electric motor ( 25 ) with the electrical energy for the operation of the electric motor ( 25 ), the insulated wires ( 31 ) as a whole sheathing metallized film ( 32 ), and a metallized film ( 32 ) sheathed cable sheath ( 33 ) having a length l. Domestic appliance according to claim 1, characterized in that the electric motor ( 25 ) is an electric three-phase motor, in particular a three-phase synchronous motor or a single-phase asynchronous motor or a linear motor, and / or that the power electronics comprises an inverter or a phase control, and / or that the household appliance ( 1 ), the electric motor ( 25 ) operate at different speeds, and / or that the power electronics ( 26 ) and the electric motor ( 25 ) represent a variable speed electric drive. Domestic appliance according to claim 1 or 2, characterized in that the insulated wires ( 31 ) are formed as insulated strands and / or that the metallized film ( 32 ) is formed as a metal-coated plastic film or as a metal foil. Domestic appliance according to one of claims 1 to 3, characterized in that the electrical cable ( 30 ) an area ( 39 ) of length l, in which the metallized film ( 32 ) and the cable sheath ( 33 ) the isolated wires ( 31 ), and two, at the area ( 39 ) of length l subsequent ends ( 40 ), on which the isolated others ( 31 ) from the cable sheath ( 33 ) are stripped. Domestic appliance according to one of claims 1 to 4, that the metallized film ( 32 ) on the cable sheath ( 33 ) and / or in the cable sheath ( 33 ) is integrated. Domestic appliance according to one of claims 1 to 5, characterized in that the electrical cable ( 30 ) a grounding wire ( 34 ), which with the isolated wires ( 31 ) of the metallized film ( 32 ) is encased and in particular is designed as a grounding wire. Domestic appliance according to claim 6, characterized in that the grounding wire ( 34 ) conductive with the metallized film ( 32 ), in particular over the entire length (l) of the cable sheath ( 33 ). Domestic appliance according to claim 6 or 7, characterized in that the grounding wire ( 34 ) at least in the region of one of the two ends ( 40 ) of the electric cable ( 30 ) preferably in the region of both ends ( 40 ) of the electric cable ( 30 ) earthed, and in particular the electric motor ( 25 ). Domestic appliance according to claim 8, characterized in that the grounding wire ( 34 ) in the area of the ends ( 40 ) of the electric cable ( 30 ) with electrical insulation ( 38 ) is provided. Domestic appliance according to one of claims 1 to 9, characterized in that it is a household refrigerator ( 1 ), which is a thermally insulated inner container ( 2 ) with a refrigerated interior intended for storing foodstuffs ( 3 ) and one for cooling the coolable interior ( 3 ) provided refrigerant circuit ( 20 ) with a compressor ( 21 ), wherein the compressor ( 21 ) the electric motor ( 25 ) having. A method of manufacturing the household appliance according to one of claims 6 to 10, comprising the following method steps: - providing an electrical cable ( 30 ), which isolates the isolated wires ( 31 ), the grounding wire ( 34 ), the metallized film ( 32 ), the isolated wires ( 31 ) and the grounding wire ( 34 ), and the cable sheath ( 33 ), the metallized film ( 32 ), - stripping the cable sheath ( 33 ) at both ends ( 40 ) of the electric cable ( 30 ) at stripping points, wherein preferably the metallized film ( 32 ) when stripping the cable sheath ( 33 ) is torn off at the stripping points, - stripping the insulated wires ( 31 ) on both ends of the electric cable ( 30 ), and - connecting the insulated wires ( 31 ) to the power electronics ( 26 ) and to the electric motor ( 25 ) and grounding the grounding wire ( 34 ) preferably with both ends of the grounding wire ( 34 ) and in particular earth of the electric motor ( 25 ) by means of the grounding wire ( 34 ).

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