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Refrigerator set

A refrigeration device and refrigerant technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of increased compression power and power consumption, and achieve the effect of preventing inflow

Active Publication Date: 2016-07-20
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In such a refrigeration device, when the amount of refrigerant returned to the intermediate pressure portion of the compression unit increases, the compression power increases and the power consumption increases.
In addition, in order to reduce the specific enthalpy, a higher capacity of the heat exchanger is required, and the size of the heat exchanger is increased.

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0018] (1) Structure of refrigeration unit R

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 It is a refrigerant circuit diagram of the refrigeration apparatus R to which one embodiment of this invention is applied. The refrigerator R in this embodiment includes a refrigerator unit 3 installed outdoors in a store such as a supermarket, and one or more (only one is shown in the drawing) showcase units 4 installed in a counter of the store. The refrigerator unit 3 and the showcase unit 4 are connected by a refrigerant pipe (liquid pipe) 8 and a refrigerant pipe 9 via a unit outlet 6 and a unit inlet 7 to form a refrigerant circuit 1 .

[0020] The refrigerant circuit 1 uses, as a refrigerant, carbon dioxide (R744) whose refrigerant pressure on the high-pressure side is equal to or higher than its critical pressure (supercritical). This carbon dioxide refrigerant is a natural refrigerant that has a small glob...

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PUM

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Abstract

The invention provides a refrigerator set, which can restrain power consumption, realize miniaturization, appropriately adjust a refrigerant shunt volume, and prevent a liquid refrigerant from flowing to a compression unit. The refrigerator set is provided with a first inner heat exchanger configured on a refrigerant loop arranged on the downstream side of a gas cooler, and on the upstream side of an electric expansion valve; the electric expansion valve connected to a refrigerant loop arranged on the downstream side of the first inner heat exchanger, and on the upstream side of the electric expansion valve; a casing connected to a refrigerant loop arranged on the downstream side of an electric expansion valve, and on the upstream side of the other electric expansion valve; an auxiliary loop allowing the refrigerant in the casing to flow into the first flow path of the first inner heat exchanger through an electric expansion valve (43) or an electric expansion valve (47) to exchange heat with the refrigerant in the second flow path of the first inner heat exchanger, and then to be absorbed into the middle pressure portion of a compressor; and a main loop allowing the refrigerant to flow out from the lower part of the casing and flow into an electric expansion valve.

Description

technical field [0001] The present invention relates to a refrigerating device in which a refrigerant circuit is formed by a compression unit, a gas cooler, a main throttling unit and an evaporator. Background technique [0002] Conventionally, in a refrigeration device, a refrigeration cycle is constituted by a compression unit, a gas cooler, an expansion unit, and the like. That is, after the refrigerant compressed by the compression unit is radiated by the gas cooler and decompressed by the throttling unit, the refrigerant is evaporated by the evaporator. And, the surrounding air is cooled by the evaporation of the refrigerant at this time. [0003] In addition, in recent years, due to natural environmental problems and the like, Freon-based refrigerants have been gradually no longer used. Therefore, a refrigeration device using carbon dioxide, which is a natural refrigerant, as a substitute for CFC refrigerants has been developed (for example, refer to Patent Document ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/00
CPCF25B9/008F25B2309/06F25B2500/17
Inventor 桑原修森徹对比地亮佑
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD