公开(公告)号：US10220677B2

公开(公告)日：2019-03-05

申请号：US15549431

申请日：2016-01-29

Applicant: DENSO CORPORATION

Inventor： Teruaki Ohyama ,  Koji Sakai ,  Yuji Kamiya ,  Tomoyuki Sumi ,  Shinji Nakamoto

IPC: B60H1/00 ,  B60L1/00 ,  B60L1/08 ,  F25B49/02 ,  B60H1/32 ,  F25B1/04 ,  F25B5/04 ,  F25B6/04

Abstract: An air conditioner for a vehicle has a compressor, a radiator, a first pressure reducer, a gas-liquid separator, a second pressure reducer, an exterior heat exchanger, an intermediate pressure refrigerant passage, a switching device, and a controller. The controller operates the switching device to switch from a refrigerant circuit of a two-stage compression mode to a refrigerant circuit of a single-stage compression mode when a compressor stop signal is output in the two-stage compression mode. The single-stage compression mode is a mode that blocks at least a flow of an intermediate-pressure refrigerant into the intermediate pressure refrigerant passage and makes refrigerant remained in the intermediate pressure refrigerant passage to flow out of the intermediate pressure refrigerant passage. The controller stops the compressor after controls the compressor to continue operating for a specified time in the single-stage compression mode. The controller restarts the compressor when the compressor stop signal is canceled.

公开(公告)号：US10465953B2

公开(公告)日：2019-11-05

申请号：US15543287

申请日：2016-01-27

Applicant: DENSO CORPORATION

Inventor： Teruaki Ohyama ,  Yuji Kamiya ,  Tomoyuki Sumi ,  Akitomo Yamanaka ,  Koji Sakai

IPC: F25B5/04 ,  F25B31/00 ,  F04D25/06 ,  F04D27/00 ,  F25B49/02

Abstract: An air conditioning apparatus includes an electric compressor, an inverter, a temperature detection element, and an ECU. The electric compressor compresses a refrigerant drawn from a refrigerant intake port and discharges the refrigerant from a refrigerant discharge port. The inverter is integrated with the electric compressor so as to be cooled by the drawn refrigerant, and operates the electric compressor according to a control signal. The temperature detection element detects a temperature of the inverter. The ECU outputs a control signal to control the inverter. The ECU performs any one or both of a control for reducing a self-cooling amount of the electric compressor and a control for increasing a self-heat generation amount of the inverter with respect to the inverter when the temperature detected by the temperature detection element is lower than a predetermined reference temperature.