Abstract:
히트 펌프 멀티 공기 조화기 및 그 제어 방법을 개시한다. 본 발명에 따른 히트 펌프 멀티 공기 조화기 및 그 제어 방법은, 히트 펌프 멀티 공기 조화기에서 정지 측 실내기의 실내 열 교환기 내부의 냉매량을 가변 조정함으로써 별도의 추가 장치를 사용하지 않고 부분 난방 시의 최적 성능과 효율을 구현하는 것을 목적으로 한다. 이를 위해 본 발명에 따른 히트 펌프 멀티 공기 조화기의 제어 방법은, 복수의 실내기를 구비하는 히트 펌프 멀티 공기 조화기의 제어 방법에 있어서, 난방 운전 모드에서 복수의 실내기 가운데 일부 실내기가 정지 상태일 때, 난방 운전 측 실내기의 액관 온도가 미리 설정된 기준 온도보다 낮으면 난방 운전 측 실내기의 냉매량이 과다한 것으로 판단하여 정지 측 실내기의 실내 전자 팽창 밸브의 개도를 감소시키고; 난방 운전 측 실내기의 액관 온도가 미리 설정된 기준 온도보다 높으면 난방 운전 측 실내기의 냉매량이 부족한 것으로 판단하여 정지 측 실내기의 실내 전자 팽창 밸브의 개도를 증가시킨다.
Abstract:
The present invention relates to a method and an apparatus for generating and recovering a multiple-access signal in a mobile communication system. In order to generate the multiple-access signal according to the present invention, each transmitter transmits information by using all or a portion of given channel resources. At this time, a signal from each transmitter is mapped to an OFDM time-frequency resource space by a trellis modulation path. The mobile communication system according to the present invention allows the trellis modulation path of the plural transmitters to be mapped to the same resource space. According to the present invention, a receiver uses a symbol-by-symbol message passing method and a path linking method in order to effectively detect and discriminate the signals transmitted from the plural transmitters via the same channel resource space. The receiver, for more efficiently recovering the detected signals, uses a state space extending method, a reverse pre-decoding method and a successive interference cancelation method.
Abstract:
Provided are an air conditioner and a control method of an air conditioner capable of improving efficiency of an inverter compressor by injecting superheated steam into the inverter compressor during heating and cooling. An air conditioner includes: a dual inverter compressor including a first inverter compressor and a second inverter compressor; an internal heat exchanger which is prepared between an indoor heat exchanger and an outdoor heat exchanger, and generates superheated steam through heat exchange between a gas refrigerant and a liquid refrigerant; a first bypass pipe connected to the internal heat exchanger by being bypassed in the refrigerant pipe connecting the indoor heat exchanger and the outdoor heat exchanger; an electric motor expansion valve which is prepared in the first bypass pipe, and is controlled to prevent the gas refrigerant from being re-entered or entered into the internal heat exchanger; a superheated steam injection port for injecting the superheated steam to the dual inverter compressor by being prepared in a superheated steam guide pipe guiding the superheated steam generated in the internal heat exchanger o the dual inverter compressor; a bypass valve which is prepared in a second bypass pipe bypassed in the superheated steam guide pipe, and controls to inject or not to inject the superheated steam discharged from the internal heat exchanger to the dual inverter compressor; and a superheated steam blocking valve which is prepared in the superheated steam guide pipe, and controls to inject or not to inject the superheated steam to the dual inverter compressor.
Abstract:
PURPOSE: A light emitting device and a manufacturing method thereof are provided to integrally form a test terminal part and an external connection terminal part, thereby increasing the mounting area of light sources. CONSTITUTION: A circuit substrate (10) includes a test terminal and a penetration hole. The test terminal is formed on the substrate body. The penetration hole is formed through the substrate body. A connector (20) is electrically connected to the test terminal. At least one light source (30) is placed on the circuit substrate.