Refrigerating apparatus and refrigerating unit
A technology of refrigeration device and compression device, applied in refrigerators, refrigeration and liquefaction, compressors, etc., can solve the problems of increasing power consumption, unable to fully improve COP (refrigeration coefficient, not fully considering energy saving, etc.) The effect of current rise
Active Publication Date: 2015-06-24
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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Problems solved by technology
As a result, the reliability of the compressor decreases and the power consumption increases, so the COP (Coefficient of Cooling) cannot be sufficiently improved, and energy saving is not fully considered.
Method used
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Embodiment 1
[0032] figure 1 It is a diagram showing the refrigeration cycle configuration of Example 1 of the refrigeration apparatus of the present invention.
[0033] exist figure 1 Here, I is a refrigerating device, and the refrigerating device I is composed of a refrigerating unit II installed outdoors and a low-pressure device III installed indoors and connected to the refrigerating unit through refrigerant piping. In this embodiment, the above-mentioned low-voltage equipment III is a cabinet or the like installed in a store such as a supermarket to cool objects to be cooled such as food. The general load of such cabinets is prone to great changes. In addition, the low-voltage equipment III is not limited thereto, and can be similarly applied to other types of refrigerators, freezers, or indoor units of air conditioners, and can also be connected in parallel to a plurality of low-voltage equipment.
[0034] The refrigerating device 1 of this embodiment sequentially uses a compress...
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A refrigerating apparatus and a refrigerating unit are provided. The refrigerating apparatus is provided with a refrigerating cycle formed through sequential connection, through pipes, of a compression apparatus capable of capacity control, a condensing apparatus for condensing a high-pressure refrigerating fluid compressed by the compression apparatus, a decompressing mechanism for decompressing the high-pressure refrigerating fluid condensed by the condensing apparatus, and a evaporator for evaporating the low-pressure refrigerating fluid decompressed by the decompressing mechanism. The refrigerating apparatus is also provided with a liquid refrigerating fluid cooling circuit for cooling the liquid refrigerating fluid by a decompressed refrigerating fluid obtained through pumping out part of the high-pressure refrigerating fluid circulated in the main circuit of the refrigerating cycle and decompressing the same, and injecting the decompressed refrigerating fluid obtained after cooling the liquid refrigerating fluid in the main circuit into an intermediate pressure part of the compressor; a flow control unit used for controlling the flow of the liquid refrigerating fluid flowing past the liquid refrigerating fluid cooling circuit and decompressing; and a controller for controlling the flow control unit corresponding to load variation of the main circuit.
Description
technical field [0001] The present invention relates to a refrigerating device and a refrigerating machine unit that sequentially connect a compressor, a condenser, a decompression mechanism and an evaporator to form a refrigerating cycle, in particular to a refrigerating device and a refrigerating machine unit equipped with a liquid refrigerant cooling circuit . Background technique [0002] As such prior art, there is, for example, the technology described in JP 2009-109065 A (Patent Document 1). In this prior art, there is provided a liquid refrigerant cooling circuit in which a part of the high-pressure refrigerant circulating in the main circuit of the refrigeration cycle is extracted and decompressed and injected into the intermediate pressure part of the compressor (No. a liquid injection circuit) and an intermediate pressure liquid injection circuit (a second liquid injection circuit). [0003] In addition, in the above-mentioned prior art, the cooling capacity of ...
Claims
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IPC IPC(8): F25B1/00F25B49/02F25B41/06F25B41/34
Inventor 西出昌弘大山贞夫宇野正记
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC