Refrigerating system

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

Active Publication Date: 2014-05-21
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

[0036] Hereinafter, the present invention will be further described in detail by taking a heat pump air-conditioning refrigeration system that can realize both cooling and cooling, and heat pump heating, using propane (HC-290) as the refrigerant and water as the refrigerant as an example.

[0037] like figure 1 As shown, during refrigeration, the high-temperature and high-pressure HC-290 vapor discharged from the refrigeration compressor 1 enters the first heat exchanger 3 through the a-c interface of the four-way reversing valve 2, dissipates heat to the ambient medium, and cools down and condenses into high-pressure HC-290. The liquid is depressurized into gas-liquid two-phase HC-290 with a temperature of about 10°C through the throttling mechanism 3, enters the second heat exchanger 5 to absorb heat and evaporate into low-pressure HC-290 vapor, and then passes through the four-way reversing valve. The d-b interface of 2 is sucked and compressed by the refrigeration compress...

example 2

[0041]Hereinafter, the present invention will be further described in detail by taking a single-cooling air-conditioning refrigeration system that only realizes cooling and cooling, uses propane (HC-290) as the refrigerant, and uses water as the carrier refrigerant as an example.

[0042] like figure 2 As shown, the high-temperature and high-pressure HC-290 vapor discharged from the refrigeration compressor 1 enters the first heat exchanger 3, dissipates heat to the ambient medium, reduces the temperature and condenses into a high-pressure HC-290 liquid, and then passes through the throttling mechanism 3 to reduce the pressure 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 vapor, which is inhaled and compressed by the refrigeration compressor 1 and enters the next refrigeration cycle. In the second heat exchanger 5, the water vapor is cooled by heat absorption, condense...

example 3

[0045] The present invention will be described in further detail below by taking an example of a heating-type air-conditioning and refrigeration system that only implements heat pump heating, uses propane (HC-290) as the refrigerant, and uses water as the carrier refrigerant.

[0046] like image 3 In the 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, reduces the temperature and condenses into high-pressure HC-290 with a temperature of about 40°C. The liquid is depressurized into low-temperature and low-pressure gas-liquid two-phase HC-290 through the throttling mechanism 3, and enters the first heat exchanger 3 to absorb heat from the ambient medium and evaporate into low-pressure HC-290 vapor, which is inhaled by the refrigeration compressor 1. , compress, and enter the next heat pump heating cycl...

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PUM

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Abstract

The invention discloses a refrigerating system which comprises a refrigerating compressor, a four-way reversing valve, three heat exchangers, a throttle mechanism, a gas-liquid separator, a refrigerating medium pump and four three-way reversing valves. The refrigerating compressor, the four-way reversing valve, the three heat exchangers, the throttle mechanism, the gas-liquid separator, the refrigerating medium pump and the four three-way reversing valves form a refrigerating fluid circulation sub system and a refrigerating medium circulation sub system together, and therefore dual purposes of refrigeration and heating through a heat pump are achieved. The four-way reversing valve and a refrigerating medium reversing mechanism composed of the three-way reversing valves can be omitted, so that only a single function of refrigeration or heating through the heat pump is achieved. Refrigerating fluid which is combustible, prone to explosion and poisonous is adopted, components in contact with the combustible and poisonous refrigerating fluid and the refrigerating medium pump generating noise are placed in a special machine room or placed outdoors, a refrigerating medium is made of safe matter which is good in environment-friendly performance, incombustible and free of poison such as water, carbon dioxide and the like, and phase change of the refrigerating medium, namely, latent heat of the refrigerating medium is used for conducting heat transfer. According to the refrigerating system, the refrigerating fluid which is combustible, prone to explosion and poisonous can be adopted and the refrigerating system has the advantages of being safe, environmentally friendly and capable of saving energy.

Description

technical field [0001] The invention relates to a refrigeration system, in particular to a refrigeration system used in refrigeration, air conditioners, heat pumps and other equipment. Background technique [0002] At present, direct refrigeration is mainly used in small and medium-sized refrigeration, air conditioning, and heat pump units (such as room air conditioners, unit air conditioning units, multi-unit units, etc.), that is, the refrigerant in the unit is directly used to cool (heat) objects or The space to be cooled (heated) is directly cooled or heated, and these units generally use refrigerants such as HCFC-22 with excellent physical and chemical and thermodynamic properties, good use safety and economy, which are widely used and have 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 the requirement...

Claims

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Application Information

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Patent Type & Authority Applications(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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