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A transcritical co with ejector 2 Combined heating and cooling system for multi-temperature supermarkets

A technology of combined cooling and heating, ejector, applied in evaporators/condensers, refrigerators, refrigeration components, etc., can solve problems such as refrigeration that cannot achieve large temperature differences, complicated control systems, and small temperature differences. , to achieve the effect of improving energy utilization efficiency, improving gas transmission efficiency, and reducing power consumption

Active Publication Date: 2020-09-29
SHANDONG SHENZHOU REFRIGERATION EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual process, due to the cumbersome and complicated control system, it is very easy to have the problem of poor cooling effect or even no cooling in a certain temperature zone during use.
The most important thing is that refrigeration with large temperature differences cannot be realized between different temperature zones, and the range of temperature differences is not large

Method used

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  • A transcritical co with ejector <sub>2</sub> Combined heating and cooling system for multi-temperature supermarkets
  • A transcritical co with ejector <sub>2</sub> Combined heating and cooling system for multi-temperature supermarkets

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 1 As shown, a transcritical CO with injector group designed by the present invention 2 Dual-temperature and multi-temperature zone supermarket combined cooling and heating system, including: carbon dioxide transcritical high-temperature compressor, hot water tank for 90-95°C temperature zone, hot water tank for 60-65°C temperature zone, and 40-45°C temperature zone Hot water tank, gas cooler, ejector group, first medium temperature evaporator, second medium temperature evaporator, third medium temperature evaporator, fourth medium temperature evaporator, first expansion valve, second expansion valve, third expansion valve , The fourth expansion valve, intercooler, throttle valve, low temperature evaporator, carbon dioxide subcritical low temperature compressor.

[0022]The outlet of the high-temperature compres...

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Abstract

The invention discloses a transcritical CO with ejector 2 The cooling and heating combined supply system, principle and application of multi-temperature zone supermarkets relate to the field of refrigeration technology. It solves the problems that a large amount of cooling heat is not effectively utilized in the existing system, and at the same time, the throttling loss is large, and the comprehensive energy efficiency of the system is low. The technical solution is to add a group of hot water tanks with different temperatures connected to the outlet of the high-temperature compressor, a group of ejectors connected to the outlet of the gas cooler and the inlet of the evaporator, and a group of medium-temperature water tanks corresponding to the ejector group. Evaporator. The outlet of the injector group is connected to the inlet of the intercooler. The tap water in the hot water tank group absorbs the heat in the gas cooler and becomes hot water that can be used by supermarkets. In the ejector group, the high-temperature and high-pressure fluid at the outlet of the gas cooler is used to inject the outlet gas from the corresponding group of evaporators to increase the suction pressure of the compressor, reduce the power consumption of the compressor and increase the gas delivery of the compressor. quantity.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a transcritical CO with ejector 2 Combined cooling and heating system, principle and application of multi-temperature zone supermarket. Background technique [0002] The third-generation refrigerant is HFC (hydrofluorocarbon), represented by R134a, R410a, and R245fa. With its zero ODP value and excellent energy efficiency and environmental protection characteristics, it has been rapidly and widely used. However, with the global emphasis on greenhouse gases, HFCs are listed as one of the six sources of greenhouse gases by the Kyoto Protocol. Developed countries have advocated the elimination of the use of HFCs and the development of the next generation of low-GWP refrigerants. At present, the fourth-generation refrigerant advocates the use of NH 3 , CO 2 、H 2 Natural working fluids such as O, air and hydrocarbons are used as substitutes. of which CO 2 As the most pote...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/08F25B39/02F25B41/06F25B41/30
CPCF25B9/08F25B39/02F25B2309/06F25B41/31
Inventor 徐希爱张晶李忠魁高晨晨陈威
Owner SHANDONG SHENZHOU REFRIGERATION EQUIP
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