Electric compressor integral with inverter

Abstract

An electric compressor integral with an inverter, wherein waterproof properties of an inverter containing section are reliably enhanced by minimizing a variation in sealing ability. An electric compressor integral with an inverter, wherein an inverter containing section (9) is provided on the outer periphery of a housing, an inverter device for supplying driving electric power to an electric motor is mounted in the inverter containing section (9), and an opening (10) of the inverter containing section (9) is hermetically sealed by a lid body (13). A groove (16) for placing therein a liquid seal agent (20) is provided in a flange (11) surrounding an opening (10) of the inverter containing section (9), and the joint between the flange (11) and the lid body (13) is hermetically sealed by allowing the liquid seal agent (20) placed in the groove (16) to cure. The electric compressor satisfies the relationship of L1 < L2, where L1 is the width of a joint surface (17) formed on the inner peripheral side of the groove (16) in the flange (11) and L2 is the width of a joint surface (18) formed on the outer peripheral side of the groove (16).

Description

technical field [0001] The present invention relates to an inverter-integrated electric compressor suitable for use in a vehicle air conditioner and in which the inverter device is integrally mounted. Background technique [0002] In recent years, the popularization and development of hybrid vehicles, electric vehicles, fuel cell vehicles, etc. are actively underway. In vehicle air conditioners mounted on these automobiles, an inverter-integrated electric compressor with a built-in motor is used instead of an open compressor driven by power from an engine. Inverter-integrated electric compressors are equipped with an inverter housing part on the outer periphery of the casing in which the motor and compression mechanism are built. Inside the converter housing part are assembled: the DC power supplied by the high-voltage power supply is converted into three-phase AC power and passed through the glass. A sealed terminal is supplied to an inverter device of a motor (for example...

AI Technical Summary

Problems solved by technology

Therefore, as mentioned above, although the gap naturally formed between the flange part of the converter housing part and the joint surface of the cover body is sealed by coating a sealant such as a sealing liquid gasket, it is difficult to seal the gap even if such a sealing structure is adopted. Since the sealant is applied evenly, due to this inconsistency, etc., it is difficult to ensure high-precision and uniform sealing performance, and there is a possibility that water will be soaked in the transducer housing.

[0009] In addition, even if the sealing technology shown in Patent Document 2 is used, when the sealant such as a liquid gasket filled in the groove is squeezed out by the pressure contact between the joint surfaces, it does not matter to which side of the groove the sealant is squeezed out. Determined, and this inconsistency has an impact on the formation of the sealing film, and becomes the main cause of the inconsistency in sealing

Therefore, even if the sealing technology of Patent Document 2 is used completely, it is not necessarily possible to obtain a highly reliable waterproof structure of the converter housing.

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