Lg Electronics Inc.

Cooperstandard Automotive and Industrial Inc.

Kang Wook Lee

Hansaem Park

Soojin Kang

Ho Jong Jeong

Jung Uk Lee

An air conditioning device includes a vapor injection cycle in which an operating speed of a compressor is adjusted to improve efficiency, and a method for controlling the device. The air conditioning device includes an inner heat-exchanger for exchanging heat between a first portion of refrigerant passing through a condenser and a second portion of the refrigerant branched from the first refrigerant, and an injection channel through which the second portion of the refrigerant is injected into the compressor. The inner heat exchanger includes an outer tube and an inner tube disposed inside the outer tube. The first portion of the refrigerant flows into the inner tube, while the second portion of the refrigerant flows into the outer tube. Thus, when a variation of air-conditioning load is small and an injection super-heating temperature is low, the device enables reduction of the compressor rotation speed to ensure high injection super-heating temperature.

Air conditioning device using vapor injection cycle and method for controlling the device

The present invention relates to a vehicular resonator comprising: an outer pipe that constitutes the exterior thereof; an inner pipe, a part of which is inserted into the outer pipe, and which has a slit formed therein as an air movement passage; a movable pipe configured to be able to move inside a resonation chamber formed between the outer pipe and the inner pipe; and an elastic body having one side thereof coupled to the inner pipe and the other side thereof coupled to the movable pipe, thereby providing the movable pipe with an elastic force such that the movable pipe can move.

Growing community of inventors

Seoul, South Korea

Kang Wook Lee