Abstract:
본 발명에 따른 멀티형 공기조화기 본 발명에 따른 멀티형 공기조화기는, 액체냉매가 유동되는 액체배관 및 기체냉매가 유동되는 기체배관을 포함하는 실외기; 상기 액체배관 및 기체배관과 연결되어 냉매를 순환시키는 제 1 실내기 및 제 2 실내기를 포함하는 복수개의 실내기; 상기 기체배관 및 복수개의 실내기와 연결되어 냉매를 유동시키는 기체배관 연결관; 상기 액체배관 및 복수개의 실내기들을 연결하여 냉매를 유동시키는 액체배관 연결관;을 포함하고, 상기 제 1 실내기는, 실내공기와 냉매를 열교환시키는 제 1 열교환부, 실내공기와 냉매를 열교환시키고, 상기 제 1 열교환부와 적층되어 배치되는 제 2 열교환부를 포함하는 제 1 실내열교환기; 상기 제 1 열교환부 및 제 2 열교환부로 공기를 송풍시키는 제 1 실내팬; 상기 액체배관 및 제 1 열교환기부를 연결하여 냉매를 유동시키는 제 1 액체분지관; 상기 기체배관 및 제 2 열교환기부를 연결하여 냉매를 유동시키는 제 1 기체분지관; 상기 제 1 열교환부에 연결되어 냉매를 유동시키는 제 1 열교환부 연결배관; 상기 제 2 열교환부에 연결되어 냉매를 유동시키는 제 2 열교환부 연결배관; 일측이 상기 제 1 기체분지관과 연결되고, 타측이 상기 제 1 열교환부 연결배관 및 제 2 열교환부 연결배관과 연결되는 리턴배관; 상기 제 2 열교환부 연결배관에 배치되고, 제어부의 입력신호에 의해 개도량이 조절되어 유동되는 냉매를 선택적으로 팽창시키는 제 1 실내팽창밸브; 상기 리턴배관에 배치되고, 제어부의 입력신호에 의해 개도량이 조절되어 유동되는 냉매를 선택적으로 팽창시키는 제 1 팽창밸브;를 포함한다. 본 발명에 따른 멀티형 공기조화기는 실내열교환기 중 제 1 열교환부를 응축기로 작동시키고, 제 2 열교환부를 증발기로 작동시킬 수 있기 때문에, 실내온도를 일정 범위로 유지하면서 제습모드를 지속적으로 구동할 수 있는 장점이 있다.
Abstract:
The invention relates to a refrigeration plant with multiple evaporation levels, operating according to a vapour compression cycle and comprising a circuit 2 having a high-pressure branch HP, wherein is arranged at least one heat exchanger 10, and two or more low-pressure branches LP1,LP2,LP3, each of which operates at a different evaporation level to serve users having different refrigeration requirements. In each of the low-pressure branches the plant comprises an expansion device 11',11",11"', at least one evaporator 12',12",12"' and a compressor group 13',13",13"'. Said at least one evaporator of each low-pressure branch LP1, LP2, LP3 is connected directly to said high-pressure branch HP. At least a first low-pressure branch LP1 comprises a liquid separator 20' that is fluidically connected: - to the evaporator outlet 12' to collect the liquid exiting the evaporator itself in the case in which the latter is operating in overfeeding conditions; and - to the intake of the compressor group 13'. Such liquid separator 20' is fluidically connected to a second low-pressure branch LP2 upstream of the expansion device 11" of such second low-pressure branch through a first connection duct 21'. The circuit comprises controllable first valve means 22", 23'.
Abstract:
A decentralized condenser evaporator system includes (i) a condenser system positioned to receive a gaseous refrigerant from a centralized compressor system and configured to condense the gaseous refrigerant into a liquid refrigerant, (ii) a controlled pressure receiver positioned to receive and store the liquid refrigerant, (iii) an evaporator system including a conduit, an expansion valve, and a fan, and (iv) a controller. The conduit is positioned to receive the liquid refrigerant from the controlled pressure receiver. The expansion device is positioned between the controlled pressure receiver and the conduit, and configured to facilitate modulating an amount of the liquid refrigerant that flows into the conduit from the controlled pressure receiver. The fan is positioned to facilitate providing a cooling operation to an area associated with the evaporator system through evaporation of the liquid refrigerant flowing through the conduit. The controller is configured to control a stage of the condenser system and/or the evaporator system to maintain a desired level of the liquid refrigerant within the controlled pressure receiver and facilitate maintaining a system condensing pressure of the refrigeration system at a target system condensing pressure.
Abstract:
In einem Kältegerät mit einem Gefrierfach und einem Kältemittelkreis, der einen Verdichter (21) und einen ersten Verdampfer (33, 63) aufweist, wobei dem ersten Verdampfer ein Stoppventil (36, 67) und eine erste Kapillare (31, 61) vorgeschaltet sind, ist dem ersten Verdampfer (33, 63) ein Gasventil (68) nachgeschaltet. Ein Verfahren zum Betreiben eines Kältemittelkreises in einem Kältegerät mit einem Gefrierfach, weist die Verfahrensschritte in beliebiger Reihenfolge auf: a) Schalten (81) des Verdichters; b) Schalten (82) eines Stoppventils vor einem ersten Verdampfer; c) Schalten (83) eines Gasventils nach dem ersten Verdampfer.
Abstract:
A chiller plant including at least two chillers operating at different temperatures are disclosed. Process fluid circuits of the chillers can form fluid communication when, for example, one or more of the at least two chillers may fail, so that the other chiller(s) of the at least two chillers may provide backup operation to the failed chiller(s).
Abstract:
A multi-zone vapor compression system (MZ-VCS) includes a compressor connected to a set of heat exchangers controlling environments in a set of zones, a supervisory controller determining a set of control inputs for controlling a vapor compression cycle of the MZ-VCS, and a set of capacity controllers. The supervisory controller is a model predictive controller (MPC) determining the set of control inputs using a model of the MZ-VCS including a linear relationship between thermal capacities of each heat exchanger and temperatures in a corresponding zone controlled by the heat exchanger. Each capacity controller enforces the linear relationship between the thermal capacity and the temperature in the corresponding zone.