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Air conditioning system and defrosting control method thereof

An air-conditioning system and control method technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of low evaporation temperature of working medium, room heat loss, energy consumption, etc., and achieve slow down and slow down. , the effect of slowing down the speed

Inactive Publication Date: 2016-05-25
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the air conditioner is used in an environment with very low outdoor temperature in winter, the evaporation temperature of the working medium is very low, and the moisture in the air is easy to condense into frost on the surface of the evaporator, especially in areas with high air humidity. , and frosting will increase the wind resistance of the outdoor unit, resulting in a decrease in the heat transfer coefficient of the heat exchanger
As the evaporating temperature decreases, at a certain condensing temperature, the heating coefficient of performance of the heat pump also decreases accordingly, resulting in a decrease in the utilization rate of heat energy.
[0003] For example, when the air-cooled heat pump air conditioner is operated under the condition of very low outdoor ambient temperature, the outdoor condenser will often frost, and the moisture in the air will easily condense into frost on the surface of the evaporator, especially in areas with high air humidity. Frost is more likely to occur, and frost will increase the wind resistance of the outdoor unit, resulting in a decrease in the heat transfer coefficient of the heat exchanger. With the decrease of the evaporation temperature, the heating performance coefficient of the heat pump will also decrease correspondingly at a certain condensation temperature. resulting in a decrease in the utilization rate of heat energy
[0004] If defrosting is not timely and effective, the operating efficiency of the heat pump air conditioner will be greatly reduced
At present, the commonly used defrosting method is reverse defrosting, that is, the air conditioner operates in reverse cycle, the high-temperature and high-pressure gas from the compressor enters the outdoor condenser to defrost, and the defrosted refrigerant enters the indoor unit and returns to the compressor to start the second cycle. One defrosting cycle, this defrosting method is easy to cause heat loss in the room, affects the comfort of the room, and consumes a lot of energy

Method used

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  • Air conditioning system and defrosting control method thereof
  • Air conditioning system and defrosting control method thereof
  • Air conditioning system and defrosting control method thereof

Examples

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Effect test

Embodiment 1

[0084] Such as figure 1 As shown, the air conditioning system 100 according to the embodiment of the present invention includes a compressor 101 (for example, a scroll compressor), a reversing assembly 102, a defrosting branch 107, an outdoor heat exchanger 103 (the ribs of the outdoor heat exchanger fins can be low-pressure loss ribs), outdoor fan assembly 104 (such as high static pressure fan), indoor heat exchanger 105, indoor fan assembly 106, first control valve 108, second control valve 109, throttling device, gas-liquid Separator 117 , reservoir 113 and heating assembly 116 .

[0085] Specifically, the compressor 101 has an exhaust port 1011 and an air return port 1012, and the reversing assembly 102 (such as a four-way valve) includes a first valve port 1021, a second valve port 1022, a third valve port 1023 and a fourth valve port 1024 , the first valve port 1021 is connected to the exhaust port 1011 of the compressor 101, the fourth valve port 1024 is connected to t...

Embodiment 2

[0094] Such as figure 2 As shown, the difference from the first embodiment is that in this embodiment, the air conditioning system 100 further includes a heat storage assembly 110 , a heat storage branch 111 and a heat storage control valve 112 . The heat storage component 110 includes a phase change heat storage tank 1101 and a circulation component 1102. The circulation component 1102 can transfer the heat in the phase change heat storage tank 1101 to the room. Circulation pump 11022 on the top, circulation medium is provided in the circulation pipeline 11021, the circulation pump 11022 drives the circulation medium to flow in the circulation pipeline 11021, a part of the circulation pipeline 11021 is set in the phase change heat storage tank 1101, and a part is set in the near At the position of the indoor fan assembly 106, under the action of the circulation pump 11022, the medium in the circulation pipeline 11021 circulates to transfer the heat in the phase change heat s...

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Abstract

The invention discloses an air conditioning system and a defrosting control method thereof. The air conditioning system comprises a compressor, a reversing assembly, an outdoor heat exchanger, an indoor heat exchanger, a defrosting branch circuit and a heat storage assembly. In the refrigeration or defrosting process of the air conditioning system, a first valve hole is communicated with a second valve hole, and a third valve hole is communicated with a fourth valve hole; in the heating process of the air conditioning system, the first valve hole is communicated with the third valve hole, the second valve hole is communicated with the fourth valve hole, one end of the defrosting branch circuit is connected with the other end of the outdoor heat exchanger, and the other end of the defrosting branch circuit is connected with the other end of the indoor heat exchanger; the defrosting branch circuit comprises a throttling assembly and a valve body assembly, and the valve body assembly is used for controlling the on-off state of the defrosting branch circuit; and in the defrosting process of the air conditioning system, the valve body assembly starts, the defrosting branch circuit is communicated, and the heat storage assembly is opened to release heat indoors. According to the air conditioning system, the defrosting process of the outdoor heat exchanger at a low-temperature environment is accelerated, the loss of indoor heat in the defrosting process is reduced, and the comfort of a room is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning equipment, in particular to an air conditioning system and a defrosting control method for the air conditioning system. Background technique [0002] The frosting and defrosting process of the air conditioner is a very complicated process. The factors affecting the formation and melting of the frost layer are relatively complicated, mainly including the cooling surface, outdoor climate conditions and time. When the air conditioner is used in an environment with very low outdoor temperature in winter, the evaporation temperature of the working medium is very low, and the moisture in the air is easy to condense into frost on the surface of the evaporator, especially in areas with high air humidity. , and frosting will increase the wind resistance of the outdoor unit, resulting in a decrease in the heat transfer coefficient of the heat exchanger. With the decrease of evaporating temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B47/02
CPCF25B47/02
Inventor 宋分平吴空王正兴
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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