# US 10,873,247 B2 · Electric compressor for vehicle, and method for manufacturing electric compressor for vehicle

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- Number: US 10,873,247 B2
- Document ID: US10873247B2
- Status: Granted
- Kind: B2
- Application number: 16/077,898
- Filed: 2017-01-25
- Published: 2019-03-21
- Granted: 2020-12-22
- Earliest claimed: 2016-02-24
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Takayuki Fukuda; Tsuyoshi Takemoto
- Web page: https://patentgrep.com/patent/US10873247B2

## CPC

- H02K 11/02: for suppression of electromagnetic interference
- F04B 39/00: Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B 39/06: Cooling; Heating; Prevention of freezing
- F04C 15/0057: {Driving elements, brakes, couplings, transmission specially adapted for machines or pumps (brakes, couplings, transmissions per se F16, B60)}
- F04C 29/00: Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- H02K 5/10: with arrangements for protection from ingress, e.g. water or fingers
- H02K 5/203: {specially adapted for liquids, e.g. cooling jackets}
- H02K 11/33: Drive circuits, e.g. power electronics (H02K11/38 takes precedence)
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS

## Abstract

An electric compressor for a vehicle includes a compressor case, an inverter circuit, an inverter case, and a lid that closes an opening of the inverter case. The electric compressor further includes a seal component interposed between the inverter case and the lid to seal between the inverter case and the lid. The electric compressor further includes a conductive component. The conductive component transmits an electromagnetic wave noise from the inverter case to at least one of the compressor case and the lid, the electromagnetic wave noise propagating from the inverter circuit to the inverter case when the inverter circuit provides the electric current through the electric motor.

## Claims

### Claim 1

An electric compressor for a vehicle comprising:
a compressor case made of a conductive metal material and having a pipe shape, the compressor case housing a compression mechanism which draws, compresses and discharges refrigerant, and an electric motor which drives the compression mechanism;
an inverter circuit that drives the electric motor with electric current;
an inverter case made of a conductive metal material and arranged on one side of the compressor case in an axial direction, the inverter case having a storage part that houses the inverter circuit and an opening open on one side in the axial direction;
a lid made of a conductive metal material, the lid closing the opening of the inverter case;
a seal component interposed between the inverter case and the lid to seal a gap between the inverter case and the lid; and
a conductive component which transmits an electromagnetic wave noise, that is propagating from the inverter circuit to the inverter case when the inverter circuit provides the electric current flowing through the electric motor, from the inverter case to at least one of the compressor case and the lid
wherein,
the seal component is made of material having electrical insulation properties, and has a ring shape surrounding the opening,
the conductive component has a ring shape surrounding the opening, and is arranged at an inner side or an outer side of the seal component to achieve electrical connection between the inverter case and the lid,
the seal component is joined to the conductive component, and
the electromagnetic wave noise from the inverter case is transmitted from the conductive component to the lid.

### Claim 2 (depends on 1)

The electric compressor according to claim 1, wherein
the inverter case has an inlet port through which refrigerant flows in, and a refrigerant channel that introduces the refrigerant from the inlet port into the compressor case, the inverter circuit being cooled with the refrigerant in the refrigerant channel,
the electric compressor further comprising:
a gasket interposed between the inverter case and the compressor case to seal a gap between the inverter case and the compressor case, the gasket having a channel through which the refrigerant flows from the refrigerant channel of the inverter case into the compressor case; and
a joint bolt that fixes the lid, the seal component, the inverter case, and the gasket to the compressor case.

### Claim 3 (depends on 1)

A method for manufacturing the electric compressor according to claim 1, the electric compressor further including:
a gasket having
the seal component interposed between the inverter case and the lid to seal the gap between the inverter case and the lid, and
the conductive component made of a conductive metal material and arranged between the inverter case and the lid; and
a joint bolt that fixes the lid, the gasket, and the inverter case to the compressor case,
the method for manufacturing the electric compressor comprising:
preparing the lid, the gasket, the inverter case, the joint bolt, and the compressor case, and
fixing the lid, the gasket, and the inverter case to the compressor case with the joint bolt such that the conductive component and the inverter case are in contact with each other and that the conductive component and the lid are in contact with each other.

### Claim 4 (depends on 1)

The electric compressor according to claim 1, wherein a gasket is integrally formed with the seal component and the conductive component, and
the gasket is pressed between the lid and the inverter case.

### Claim 5 (depends on 4)

The electric compressor according to claim 4, wherein a joint bolt fixes the gasket and the inverter case to the compressor case, and
the joint bolt passes through a through hole defined at the conductive component.

### Claim 6 (depends on 1)

The electric compressor according to claim 1, wherein the seal component has no through hole for a joint bolt passing through the lid, the conductive component and the inverter case.

### Claim 7 (depends on 1)

The electric compressor according to claim 1, wherein the seal component is integrally formed with the conductive component.

### Claim 8 (depends on 1)

The electric compressor according to claim 1, wherein the conductive component has a circumferential ring shape entirely surrounding the opening.