Inverter circuit board and inverter-containing electric compressor using same

• US 10,122,237 B2
• Filed: 02/07/2014
• Issued: 11/06/2018
• Est. Priority Date: 03/07/2013
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries Thermal Systems, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries Thermal Systems, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Inventors: Hattori, Makoto, Asai, Masahiko
• Primary Examiner(s): Vortman, Anatoly
• Application Number:
  US14/765,267
• Publication Number:
  US 20150372559A1
• Time in Patent Office: 1,733 Days
• Field of Search: 361720
• CPC Class Codes: F01C 21/10 Outer members for co-operation with rotary pistons; Casings casings for rotary engines or machines in general F16M
• CPC Class Codes: F04B 35/04 the means being electric
• CPC Class Codes: F04B 39/121 Casings
• CPC Class Codes: F04C 2240/803 Electric connectors or cables; Fittings therefor
• CPC Class Codes: F04C 2240/808 Electronic circuits (e.g. inverters) installed inside the machine
• CPC Class Codes: H02K 11/026 Suppressors associated with brushes, brush holders or their supports
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections

Abstract

An inverter circuit board to which a P-N terminal is attached such that stress applied to the circuit board can be distributed, making it possible to prevent detachment of the P-N terminal or damage to the circuit board or any components mounted thereon. Also provided is an inverter-containing electric compressor. A P-N terminal via which DC power is inputted is attached to this inverter circuit board, on which an inverter circuit is mounted. The P-N terminal is provided with the following: a pair of pins; a busbar of a prescribed length joined perpendicularly to one end of each pin; a resin molded member formed integrally with the pair of pins and the busbars; and surface-mounting terminals, soldered to the surface of the circuit board, and through-hole terminals, inserted into and soldered to through-holes in the circuit board, said terminals being provided on the pair of busbars.

Claims

1. An inverter circuit board comprising:

a circuit board;

an inverter circuit mounted on the circuit board;

a P-N terminal via which high-voltage DC power is inputted attached to the circuit board; and

a connector on a power cable of a power source directly connected to the P-N terminal so as to be able to be freely attached and detached,

the P-N terminal being provided with;

a pair of pins;

a pair of busbars of a prescribed length respectively joined perpendicularly to one ends of each of the pair of pins, the pair of busbars being provided with through-hole terminals attached on the circuit board by being inserted into and soldered to through-holes in the circuit board, and surface-mounting terminals attached on the circuit board by being soldered to the surface of the circuit board; and

a resin molded member formed integrally with the pair of pins and the pair of busbars.

2. The inverter circuit board according to claim 1, wherein the through-hole terminals are respectively provided at positions as far as possible from the pair of pins and the surface-mounting terminals are respectively provided at positions close to the pair of pins.

3. The inverter circuit board according to claim 1, wherein the pair of pins and the pair of busbars are resistance-welded using protrusions and a plurality of projections which are provided on one end surfaces of the pair of pins and fitted in holes on the pair of busbars.

4. An inverter-containing electric compressor which is integrated by an inverter device being assembled in an inverter housing section which is provided at a periphery of a housing, wherein

the inverter device is provided with the inverter circuit board described in claim 1, and a power source cable is able to be connected by inserting the connector, which is provided at one end of the power source cable which supplies DC power to the inverter device, into the P-N terminal which are provided on the inverter circuit board.

5. The inverter-containing electric compressor according to claim 4, wherein a coil and a condenser which constitute a filter circuit for removing noise are mounted on the inverter circuit board, and either one of the coil and condenser receives stress, which is applied to the inverter circuit board when the connector is inserted, by being attached to a rear surface side of the inverter circuit board to correspond to an attachment position of the P-N terminal provided on the inverter circuit board.

6. The inverter-containing electric compressor according to claim 4, wherein the connector provided on one end of the power source cable is provided at a position which corresponds to the P-N terminal on a side of a cover which seals the inverter housing section, and is able to be inserted into the P-N terminal when attaching the cover.