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a refrigeration system

A refrigeration system and refrigerant technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of high energy-saving requirements, high energy consumption, poor practicability, etc., and achieve reduced initial investment, low power, and good safety performance. Effect

Active Publication Date: 2017-05-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, because there is a brine that transfers cold (heat) and maintains a liquid state between the refrigerant and the cooled (heated) object or the cooled (heated) space, between the refrigerant and the cooled (heated) object or the cooled (heated) space There is a large temperature difference between (heating) spaces, which makes the indirect cooling method consume more energy than the direct cooling method. ) Equipment with high energy-saving requirements has poor practicability

Method used

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Examples

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example 1

[0035] Hereinafter, the present invention will be further described in detail by taking a heat pump air-conditioning and refrigeration system that can realize cooling and cooling as well as heat pump heating, using propane (HC-290) as the refrigerant, and water as the brine as an example.

[0036] Such as figure 1 As shown, during refrigeration, the high-temperature and high-pressure HC-290 steam discharged from the refrigeration compressor 1 enters the first heat exchanger 3 through the a-c interface of the four-way reversing valve 2, and dissipates heat to the ambient medium to cool down and condense into high-pressure HC-290. The liquid, after being depressurized by the throttling mechanism 4, becomes gas-liquid two-phase HC-290 with a temperature of about 10°C, enters the second heat exchanger 5 to absorb heat and evaporates into low-pressure HC-290 steam, and then passes through the four-way reversing valve The d-b interface of 2 is sucked and compressed by the refrigerat...

example 2

[0040]Hereinafter, the present invention will be further described in detail by taking a cooling-only air-conditioning and refrigeration system that only realizes cooling and cooling, uses propane (HC-290) as the refrigerant, and uses water as the brine as an example.

[0041] Such as figure 2 As shown, the high-temperature and high-pressure HC-290 steam discharged from the refrigeration compressor 1 enters the first heat exchanger 3, dissipates heat to the ambient medium and cools down to condense into a high-pressure HC-290 liquid, which is depressurized by the throttling mechanism 4 to a temperature of 10 The gas-liquid two-phase HC-290 at about ℃ enters the second heat exchanger 5 to absorb heat and evaporate into low-pressure HC-290 steam, which is sucked and compressed by the refrigeration compressor 1 and enters the next refrigeration cycle. In the second heat exchanger 5, the water vapor is absorbed and cooled, condensed into liquid water with a temperature of about 1...

example 3

[0044] Hereinafter, the present invention will be further described in detail by taking a heating-type air-conditioning and refrigeration system that only realizes heat pump heating, uses propane (HC-290) as the refrigerant, and uses water as the brine as an example.

[0045] Such as image 3 As shown, in a refrigeration system provided by the present invention, the high-temperature and high-pressure HC-290 steam discharged from the refrigeration compressor 1 enters the second heat exchanger 5, dissipates heat to the liquid water, cools down and condenses into high-pressure HC-290 with a temperature of about 40°C. The liquid, after being depressurized by the throttling mechanism 4 into low-temperature and low-pressure gas-liquid two-phase HC-290, enters the first heat exchanger 3 to absorb heat from the ambient medium and evaporates into low-pressure HC-290 steam, which is sucked by the refrigeration compressor 1 , compression, and enter the next heat pump heating cycle. In t...

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Abstract

The invention discloses a refrigeration system, which comprises a refrigeration compressor, a four-way reversing valve, three heat exchangers, a throttling mechanism, a gas-liquid separator, a brine pump and four three-way reversing valves, which together constitute a The refrigerant circulation subsystem and the brine circulation subsystem realize the dual purposes of refrigeration and cooling and heat pump heating; by eliminating the four-way reversing valve and the brine reversing mechanism composed of three-way reversing valves, It only realizes the single function of cooling and cooling or heat pump heating. The refrigerant can be flammable, explosive and toxic refrigerants, and the components that come into contact with flammable and toxic refrigerants and the brine pumps that generate noise can be placed in a dedicated machine room or placed outdoors; the brine uses water, carbon dioxide, etc. It is a non-flammable, non-toxic and safe substance with good environmental performance, and uses the phase change of the brine, that is, the latent heat of the brine, to transfer heat. The invention not only can use flammable, explosive and poisonous refrigerants, but also has the characteristics of safety, environmental protection and energy saving.

Description

technical field [0001] The invention relates to a refrigeration system, in particular to a refrigeration system used in refrigeration, air conditioning, heat pump and other equipment. Background technique [0002] At present, the direct cooling method is mainly used in small and medium-sized refrigeration, air conditioning, and heat pump units (such as room air conditioners, unitary air conditioning units, multi-connected units, etc.), that is, the refrigerant in the unit is directly used to cool (heat) objects or The cooled (heated) space is directly cooled or heated, and these units generally use HCFC-22, which has excellent physical, chemical and thermodynamic properties, good use safety, and economical efficiency, as a refrigerant with wide application and excellent comprehensive performance. Refrigerant, but HCFC-22 has ODP (Ozone Depletion Potential) value and high GWP (Global Warming Potential) value, which is not friendly to the environment, and has been included in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B29/00F25B41/04F25B41/06F25B41/20F25B41/30
Inventor 何国庚何雪滢
Owner HUAZHONG UNIV OF SCI & TECH
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