CN114069293A - Electric machine comprising contact elements forming terminals - Google Patents

Electric machine comprising contact elements forming terminals Download PDF

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Publication number
CN114069293A
CN114069293A CN202110895310.4A CN202110895310A CN114069293A CN 114069293 A CN114069293 A CN 114069293A CN 202110895310 A CN202110895310 A CN 202110895310A CN 114069293 A CN114069293 A CN 114069293A
Authority
CN
China
Prior art keywords
electric machine
contact element
contact elements
power contact
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110895310.4A
Other languages
Chinese (zh)
Inventor
M·巴雷瓦
M·莫蒂卡
J·A·鲁伊斯贝尔梅霍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of CN114069293A publication Critical patent/CN114069293A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/533—Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/04—Pins or blades for co-operation with sockets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/64—Means for preventing incorrect coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/64—Means for preventing incorrect coupling
    • H01R13/641—Means for preventing incorrect coupling by indicating incorrect coupling; by indicating correct or full engagement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/652—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding   with earth pin, blade or socket
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/803—Electric connectors or cables; Fittings therefor

Abstract

The invention relates to an electric machine (2) comprising a housing (1), a plurality of power contact elements (3) and a ground contact element (4) arranged on the housing (1), the power contact elements (3) and the ground contact element (4) being configured for connecting the electric machine (2) to a power supply device (5), and the power contact elements (3) forming terminals (6) for connecting to the power supply device (5) through a single connector (15). The terminal (6) further comprises a ground contact element (4) for contacting the power contact element (3) and the ground contact element (4) by means of the single connector (15), the power contact element (3) and the ground contact element (4) being formed as respective pins, wherein the power contact elements (3) are of equal length and the ground contact element (4) is longer than each power contact element (3).

Description

Electric machine comprising contact elements forming terminals
Technical Field
The present invention relates to an electric machine comprising a housing, a plurality of power contact elements and a ground contact element provided on the housing, the power contact elements and the ground contact element being configured for connecting the electric machine to a power supply device, and the power contact elements forming terminals for connection to the power supply device by a single connector.
Background
Document EP 2559804 a1 discloses an electric machine as defined above. The electric machine is combined with a gas compressor driven by the electric machine, the electric motor and the gas compressor being hermetically enclosed in a housing. The gas compressor is used to drive a working medium in a heat pump adapted to the inverse rankine cycle and installed in a household appliance as a clothes dryer, the heat pump being provided to cyclically heat and cool a circulating air flow for drying clothes. The electric machine is designed to be able to be supplied by three-phase alternating current, so that three power terminals are combined into a terminal placed on the housing for connection to a power supply device.
Document EP 2513368B 1 discloses a household appliance implemented as a clothes dryer comprising a heat pump with a gas compressor and an expansion device, which heat pump operates in an inverse rankine cycle to pump heat from a radiator to a heat source. In an inverse rankine cycle, a working medium, also commonly referred to as a "refrigerant", that circulates between a heat source and a radiator is cyclically evaporated and condensed. The drying of the moist vessel in the domestic appliance is carried out by an air flow which passes along the drying vessel and is guided in a substantially closed circuit. Wherein the air stream is heated by a heat source before passing through the wet vessel and cooled by a heat sink after passing through the wet vessel and loading itself with moisture. The cooling causes the moisture in the air stream to condense and settle out of the air stream. The settled moisture is separated and collected for subsequent disposal.
Document EP 2640885B 1 also discloses a household appliance implemented as a dryer comprising a heat pump operating in a reverse rankine cycle. The heat pump comprises a gas compressor for compressing and driving a working medium and a control device configured for providing power to the gas compressor and controlling the operation of the gas compressor. A plurality of sensors are also provided in the household appliance, which are associated with the control device for taking measurements during the drying operation and send relevant measurement data to the control device for controlling the drying operation.
Document EP 2732090B 1 also discloses a household appliance, in particular embodied as a dryer, and comprising a heat pump. The air flow for drying is drawn in from the surroundings of the household appliance by a suitable blower and is guided in an open circuit. The air flow is first heated by the heat source of the heat pump, then passed along the wet vessel to be dried, and then cooled in a radiator to remove entrained moisture. Finally, the air flow is discharged back to the surroundings.
Document EP 2985466 a1 discloses various embodiments of a gas compressor for application in a heat pump in a household appliance, said gas compressor being embodied as a rotary piston gas compressor or as a reciprocating piston gas compressor.
Document EP 1902496B 1 discloses a power terminal feed-through adapted to be mounted in a housing, the power terminal feed-through comprising a metal body having a cylindrical side wall, at least one electrically conductive pin extending through the metal body and a seal sealing the at least one electrically conductive pin to the metal body. The seal may be a preformed insert comprising glass.
In this context, a household appliance is an appliance intended for operating a private household facility for the purpose of achieving a specific and predetermined substance.
General regulations relating to electrical equipment in any appliance, including any household appliance, require that a common ground potential to all electrical components be established in the appliance. Therefore, in addition to the cables dedicated to power or signal distribution, additional cables are required to properly connect each component to a common ground potential. This means in particular that any electrically conductive housing, in particular any metal housing, is provided with a grounding contact element to be attached to a ground potential. It is common practice to provide such a grounding contact element: a tab between the housing and a screw fixed to the electrically conductive housing for attaching a suitable ground connector to a cable having a ground potential.
Although the generic solution for establishing a common ground potential in an appliance is easily implemented by the manufacturer of the electric motor to be built into the appliance, simply by including some protruding contacts as contact points in the structure, the generic solution presents difficulties for the manufacturer who eventually integrates all components into the appliance. In particular, a common solution requires at least two different types of connections to be made to connect to an electric motor of the type defined in the opening paragraph above, i.e. one to the power contact element and one to the ground contact element. This requires at least two steps in the manufacturing process. Furthermore, by juxtaposing connectors, the correct contacting of all existing power contact elements can be error prone.
Disclosure of Invention
Therefore, there is a need to provide a mistake-proof and easy-to-install contact for both power and ground contact elements.
It is therefore an object of the invention to provide an electric machine as defined in the opening paragraph above which allows error-proof and convenient contact with the power contact element and the ground contact element when integrated into an appliance.
To achieve this object, the invention provides an electric machine of the generic type as defined in the preamble of the appended independent claim, which electric machine also comprises the features of the characterizing part of the independent claim.
Preferred embodiments of the invention are defined in the appended dependent claims and the subsequent disclosure. The preferred embodiments can also be applied in any possible combination with each other under technical consideration, even if not explicitly specified here.
Accordingly, the present invention provides an electric machine as a solution to the above-mentioned problems, the electric machine comprising a housing, a plurality of power contact elements and a ground contact element provided on the housing, the power contact elements and the ground contact element being configured for connecting the electric machine to a power supply device, and the power contact elements forming terminals for connection to the power supply device through a single connector, wherein the terminals further comprise a ground contact element for contacting the power contact elements and the ground contact element through the single connector, the power contact elements and the ground contact element being formed as respective pins, wherein the power contact elements are equal in length, and the ground contact element is longer than each power contact element.
The advantages of the invention include: all contact elements, including power and ground contact elements, are combined into a single terminal, so that all contact elements can be connected via a single connector. All connections that need to be connected to the electrical machine can thus be attached by mounting a single connector that provides all necessary contact points with the power supply device and the common ground.
By making the ground contact element longer than the power contact element, it is further ensured that: when the connector is mounted, the ground contact elements are first connected, thereby attaching the housing to a common ground and determining: if any connection to the electrical contact element within the housing fails due to undesired contact with the housing, the attachment of a supply potential to the housing can be avoided. Instead, the resulting short to common ground provides a clear and easily diagnosed error signal. Furthermore, it is possible to ensure that: the ground contact element is eventually released from the connector when the connector is removed from the terminal.
Furthermore, a relatively large grounding contact element is easy to apply to verify proper attachment of the connector to the terminal.
The invention can in principle be applied to any electric machine, and an electric machine embodying the invention can be applied to any household appliance. In particular, the household appliance may be a laundry care machine, such as a dryer or a washer-dryer, or a dishwasher, or a cooling appliance, such as a refrigerator or an ice chest, or a heating appliance, such as a water heater or a climate control device, all of which are equipped with a heat pump for drying, cooling or heating purposes, the electric machine being used to drive a gas compressor in the heat pump.
In a preferred embodiment of the invention, the plurality of electrical power contact elements is three electrical power contact elements. Therefore, the present invention is applicable to an electric machine that operates by supplying three-phase alternating current.
In another preferred embodiment of the invention, the housing comprises a sheet metal part comprising the terminals, each power contact element is isolated from the sheet metal part by an isolator, and the ground contact element is electrically connected to the sheet metal part. Therefore, the terminal is easy to manufacture and easy to attach to the connector.
In another preferred embodiment of the invention, the terminals are flat areas on the housing. The shape of the housing can thus be shaped according to the existing requirements, and the terminals can thus be made specifically to be suitably selected parts of the housing. More preferably, the power contact element may be included in a sealed feed-through comprising a terminal, so that commercially available sealed feed-throughs may be applied in the present invention.
In a further preferred embodiment of the invention, each of the power contact element and the ground contact element is shaped as a cylinder.
In a further preferred embodiment of the invention, the length of the ground contact element is 0.5mm to 30mm longer than the length of each power contact element, preferably about 6mm longer.
In a further preferred embodiment of the invention, an electric machine is connected to the gas compressor for driving the gas compressor, which makes the invention suitable for application in gas compressors, in particular in heat pumps. More preferably, the motor and the gas compressor are enclosed by a housing. More preferably, the housing sealingly encloses the electric machine and the gas compressor. More preferably, the gas compressor is configured for compressing a gaseous working medium circulating in the heat pump. More preferably, the gas compressor is one of a reciprocating piston compressor, a rolling piston compressor and a scroll compressor.
In a further preferred embodiment of the invention, the electric machine is configured for operation in a domestic appliance. In this case, the electric machine is used to drive the compressor in the heat pump, as previously described. More preferably, the household appliance is one of a laundry care machine, in particular a dryer or a washer-dryer, or a dishwasher, or a cooling appliance, such as a refrigerator or a freezer, or a heating appliance, such as a water heater or a climate control device.
Drawings
Preferred embodiments of the present invention will now be explained in detail with reference to the accompanying drawings. These figures show the following:
FIG. 1 shows a schematic view of one embodiment of an electric machine including a gas compressor driving a heat pump;
FIGS. 2, 3, and 4 illustrate upper views of one embodiment of a housing including an enclosed electric machine; and
fig. 5, 6 and 7 show views of the upper part as in fig. 3, 4 and 5, with the connector placed on the housing.
Detailed Description
As shown in detail in fig. 1, the electric machine 2 includes a hermetic casing 1, a plurality of power contact elements 3 (two in the example of fig. 1), and a ground contact element 4 provided on the casing 1. The power contact element 3 and the ground contact element 4 are configured for connecting the electric machine 2 to the power supply device 5, the power contact element 3 being formed to be connected to the terminal 6 of the power supply device 5 by a single connector 15, the single connector 15 being only schematically shown above the power contact element 3 and the ground contact element 4. The connector 15 communicates with the power supply device 5 via an external electrical lead 16.
The terminal 6, which is provided as a flat area or structure on the housing 1, further comprises a ground contact element 4, so that the power contact element 3 and the ground contact element 4 can be contacted by a single connector 15. The power contact elements 3 and the ground contact elements 4 are formed as respective pins, wherein the power contact elements 3 have equal lengths and the ground contact elements 4 are longer than each power contact element 3. Thus, all connections that need to be connected to the electric machine 2 can be attached by mounting a single connector 15, which single connector 15 provides all necessary contact points with the power supply device 5 and the common ground.
Each of the power contact element 3 and the ground contact element 4 is shaped as a cylinder and is preferably made of a suitable conductive metal such as copper or a copper alloy. The length of the ground contact element 4 is 0.5mm to 30mm longer than the length of each power contact element 3, preferably about 6mm longer. An internal electrical lead 7, shown as a dashed line, connects the power contact element 3 to the electrical machine 2 and the ground contact element 4 to the housing 1 for protection.
By making the ground contact element 4 longer than each power contact element 3, it is further ensured that the ground contact element 4 is connected first when mounting the connector 15, thereby attaching the housing to the common ground and determining: if any connection with the power contact element 3 within the housing 1 fails due to undesired contact with the housing 1, attachment of a power supply potential to the housing 1 can be avoided. Instead, the resulting short to common ground provides a clear and easily diagnosed error signal. Furthermore, it is possible to ensure that: when the connector 15 is removed from the terminal 6, the grounding contact element 4 is finally released from the connector 15, which makes it possible to maintain the connection to the common ground for as long as possible and to prevent it from being exposed to undesired supply potentials when the connector 15 is removed.
Furthermore, a relatively large grounding contact element is easy to apply to verify proper attachment of the connector to the terminal.
The plurality of electrical contact elements 3 is three electrical contact elements 3, which means that the electrical machine 2 will be powered by a three-phase alternating current provided by the power supply device 5.
The housing 1 completely hermetically encloses the electric machine 2 and a gas compressor 8 driven by the electric machine 2, with the exception of the power contact element 3 and the ground contact element 4, there being connector terminals, not explicitly shown, provided for a gas inlet and a gas outlet. The housing 1 comprises a sheet metal part comprising the terminals 6, each power contact element 3 being isolated from the sheet metal part by an isolator 14, the isolator 14 not being evident in fig. 1 but being evident in fig. 2 to 4. The terminal 6 may comprise a commercially available feed-through for guiding the electrical contact element 3. The ground contact element 4 is electrically connected to the sheet metal part, as is shown diagrammatically in fig. 1 by a corresponding inner electrical lead 7. In practice, however, the housing 1 is made of metal and the ground connection pin 4 may be connected directly to the housing, for example by soldering, brazing or welding at or near the terminal 6. The closed arrangement of the electric machine 2 and the gas compressor 8 makes it possible to immerse both machines in the gas to be compressed by the gas compressor 8, so that this gas is used as a cooling medium for the gas compressor 8 and the electric machine 2. The heat generated during operation can be carried away by such gas as it leaves the gas compressor 8 in a compressed state, or transferred to the housing 1 for dissipation to the environment, or both.
In the embodiment of fig. 1, the gas compressor 8 is configured for compressing a gaseous working medium circulating in a heat pump 8, 9, 10, 11, 12, said heat pump 8, 9, 10, 11, 12 comprising: a gas compressor 8; a working medium circuit 9 for guiding a gas-phase or liquid-phase working medium supplied from an inverse rankine cycle applied to the heat pump; a heat source 10, which is a heat exchanger that transfers heat to a process air stream by condensing a working medium; a radiator 11, which is a heat exchanger that extracts heat from the air flow by evaporating the working medium; and a flow restrictor 12, which may be a valve or a capillary tube, that depressurizes the working medium as it passes through the flow restrictor from the heat source 10 to the heat sink 11. The heat sink 11 also serves to condense moisture in the air flow passing therethrough and to separate the condensed moisture from the air flow, thereby achieving a drying process in which the air flow is used to dry wet wares, such as laundry, as generally described in the above-cited prior art documents. A condensate collector 13 is provided for collecting such condensate and storing it for disposal. The gas compressor 8 may be a reciprocating piston compressor or a rotary piston compressor, as described in the prior art documents cited above.
In the embodiment of fig. 1, the electric machine 2 is configured for operating in a household appliance that is a clothes dryer. Wherein the electric machine 2 is used to operate the gas compressor 8 in the heat pump 8, 9, 10, 11, 12, as described in the previous paragraph.
The heat pump 8, 9, 10, 11, 12 shown in fig. 1 can be provided in a domestic appliance, for example a laundry care machine, in particular a dryer or washer-dryer, or a dishwasher, or a cooling appliance, in particular a refrigerator or freezer, or a heating appliance, in particular a water heater or climate control device.
Fig. 2, 3 and 4 show various views of the upper part of the housing 1 including the terminal 6, on which terminal 6 three power contact elements 3 are placed, shaped as cylinders and isolated from the housing 1 by an isolator 14, which may be made of glass or plastic. Isolator 14 may hermetically seal housing 1 from the ambient environment of housing 1 and may be disposed in a commercially available feedthrough included in terminal 6 or even forming terminal 6. Likewise, the ground contact elements 4 are placed on the terminals 6 without continuing to adopt a symmetrical arrangement in the arrangement of the three power contact elements 3. Furthermore, all power contact elements 3 have an equal length and the length of the ground contact element 4 is about 6mm longer than the length of each power contact element 3.
Fig. 5, 6 and 7 show the same upper part of the housing 1 with the terminals 6, the power contact elements 3 and the ground contact elements 4, the connectors 15 being attached to the terminals 6. Figure 7 shows a section through the configuration of figure 6 along section line B-B. The isolator 14 appears in this cross section as an integral part of the power contact element 3, but is not indicated in detail in fig. 7.
Advantages of the embodiments shown in the drawings include: all contact elements 3, 4, including the power contact element 3 and the ground contact element 4, are combined into a single terminal 6, so that all contact elements can be connected via a single connector 15. All connections that need to be connected to the electric machine 2 can thus be attached by mounting a single connector 15 that provides all necessary contact points with the power supply device 5 and the common ground.
By making the ground contact element 4 longer than the power contact element 3, it is further ensured that: when mounting the connector 15, the ground contact elements 4 are first connected, so that the housing 1 is attached to a common ground and it is possible to determine: if any connection with the power contact element 3 within the housing 1 fails due to undesired contact with the housing 1, attachment of a power supply potential to the housing 1 can be avoided. Instead, the resulting short to common ground provides a clear and easily diagnosed error signal. Furthermore, it is possible to ensure that: when the connector 15 is removed from the terminal 6, the ground contact element 4 is finally released from the connector 15. Furthermore, the relatively large ground contact element 4 is easy to apply to verify the correct attachment of the connector 15 to the terminal 6.
List of reference numerals
1 casing
2 electric machine
3 electric contact element
4 ground contact element
5 Power supply device
6 terminal
7 internal electrical leads
8 gas compressor
9 working medium circuit
10 Heat source
11 radiator
12 flow restrictor
13 condensation collector
14 isolator
15 connector
16 external electrical leads

Claims (14)

1. An electric machine (2) comprising a housing (1), a plurality of power contact elements (3) and a ground contact element (4) provided on the housing (1), the power contact elements (3) and ground contact element (4) being configured for connecting the electric machine (2) to a power supply device (5), and the power contact elements (3) forming terminals (6) for connecting to the power supply device (5) through a single connector (15), characterized in that the terminals (6) further comprise the ground contact element (4) for contacting the power contact elements (3) and ground contact elements (4) through the single connector (15), the power contact elements (3) and ground contact elements (4) being formed as respective pins, wherein the lengths of the power contact elements (3) are equal, while the ground contact element (4) is longer than each power contact element (3).
2. An electric machine (2) as claimed in claim 1, wherein the plurality of electrical power contact elements (3) is three electrical power contact elements (3).
3. The electric machine (2) according to any of claims 1 and 2, wherein the housing (1) comprises a sheet metal part comprising the terminal (6), each power contact element (3) is isolated from the sheet metal part by an isolator (14), and a ground contact element (4) is electrically connected to the sheet metal part.
4. An electric machine (2) as claimed in any of the preceding claims, wherein the terminal (6) is a flat area on the housing (1).
5. An electric machine as claimed in claim 4, wherein the power contact element (3) is included in a sealed feed-through comprising the terminal (6).
6. An electric machine (2) as claimed in any of the preceding claims, wherein each of the power contact element (3) and the ground contact element (4) is shaped as a cylinder.
7. An electric machine (2) as claimed in any of the preceding claims, wherein the length of the ground contact element (4) is 0.5 to 30mm longer than the length of each power contact element (3), preferably about 6mm longer.
8. An electric machine (2) as claimed in any of the preceding claims, wherein the electric machine is connected to a gas compressor (8) for driving the gas compressor (8).
9. An electric machine (2) as claimed in claim 8, wherein the electric machine (2) and the gas compressor (8) are enclosed by the housing (1).
10. The electric machine (2) according to claim 9, wherein the housing (1) hermetically encloses the electric machine (2) and the gas compressor (8).
11. An electric machine (2) according to any of claims 8 to 10, wherein the gas compressor (8) is configured for compressing a gaseous working medium circulating in a heat pump (8, 9, 10, 11, 12).
12. An electric machine (2) as claimed in any of claims 8 to 11, wherein the gas compressor (8) is one of a reciprocating piston compressor, a rolling piston compressor and a scroll compressor.
13. An electric machine (2) as claimed in any of the preceding claims, wherein the electric machine (2) is configured for operation in a domestic appliance.
14. An electric machine (2) according to claim 13, wherein said household appliance is one of a laundry care machine, in particular a dryer or a washer-dryer, or a dishwasher, or a cooling appliance, in particular a refrigerator or an ice chest, or a heating appliance, in particular a water heater or a climate control device.
CN202110895310.4A 2020-08-07 2021-08-05 Electric machine comprising contact elements forming terminals Pending CN114069293A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20382735 2020-08-07
EP20382735.7 2020-08-07

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Publication Number Publication Date
CN114069293A true CN114069293A (en) 2022-02-18

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EP (1) EP3952032A1 (en)
CN (1) CN114069293A (en)

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EP4343151A1 (en) 2022-09-22 2024-03-27 BSH Hausgeräte GmbH Electrical device including an integrated temperature sensor

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EP2455526A1 (en) 2010-11-17 2012-05-23 BSH Bosch und Siemens Hausgeräte GmbH Machine comprising a heat pump and related set of processes
DE102011078922A1 (en) 2011-07-11 2013-01-17 BSH Bosch und Siemens Hausgeräte GmbH Exhaust air drying with additional heating and heat exchanger unit
EP2559804A1 (en) 2011-08-18 2013-02-20 BSH Electrodomésticos España, S.A. Household appliance comprising a driving unit for a heat pump
FR3015796B1 (en) * 2013-12-20 2017-02-10 Tecumseh Europe S A FIXING DEVICE AND ELECTRICAL CONNECTION OF A HERMETIC COMPRESSOR
EP2985466A1 (en) 2014-08-14 2016-02-17 BSH Electrodomésticos España, S.A. Rotary compressor, heat pump, and household appliance

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Application publication date: 20220218