Air conditioner only having refrigeration function and control method thereof

A control method and technology for air conditioners, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as affecting the heat exchange performance of the evaporator, increasing the compression power consumption of the compressor, affecting the energy efficiency level of the air conditioner, etc. The effect of compressing power consumption, improving energy efficiency, and promoting energy saving and emission reduction

Active Publication Date: 2016-07-20
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

[0002] The current air-conditioning refrigeration system does not optimize the cycle design of the gaseous refrigerant after throttling and before entering the evaporator, which causes the gaseous refrigerant to affect the heat transfer performance of the evaporator and increase the compression power consumption of the compressor, thus affecting the energy efficiency of the air conditioner
Air injection enthalpy increase and two-stage compression technology can improve the heating capacity of the air conditioning system at low and ultra-low temperatures, but for the cooling conditions often used by air conditioners, the energy efficiency improvement is very limited

Method used

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  • Air conditioner only having refrigeration function and control method thereof
  • Air conditioner only having refrigeration function and control method thereof
  • Air conditioner only having refrigeration function and control method thereof

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Effect test

Embodiment 1

[0063] In this embodiment, the first detection object is the outdoor ambient temperature T4 and the exhaust temperature. First, the operating frequency F is obtained according to the detected outdoor ambient temperature T4, and the setting is calculated based on the detected outdoor ambient temperature T4 and the operating frequency F. Set the exhaust temperature, and then adjust the opening of the second throttle element so that the detected exhaust temperature reaches the set exhaust temperature. It is understandable that the calculation formula is preset in the electric control element of the single cooling air conditioner, and the calculation formula can be specifically defined according to actual conditions.

[0064] Specifically, when the first detection object is the outdoor ambient temperature T4 and the exhaust temperature, the outdoor ambient temperature T4 is detected when the cooling is turned on, the operating frequency F of the compressor is determined according to T...

Embodiment 2

[0070] In this embodiment, the first detection object is the outdoor ambient temperature T4 and exhaust pressure. First, the operating frequency F is obtained based on the detected outdoor ambient temperature T4, and the set is calculated based on the detected outdoor ambient temperature T4 and the operating frequency F. Set the exhaust pressure, and then adjust the opening of the second throttle element so that the detected exhaust pressure reaches the set exhaust pressure.

[0071] Specifically, when the first detection object is the outdoor ambient temperature T4 and the exhaust pressure, the outdoor ambient temperature T4 is detected when the cooling is turned on, the operating frequency F of the compressor is determined according to T4, and the set exhaust pressure Pp is determined according to T4 and F; Where Pp=a3*F+b3+c3*T4; the value range of a3, b3, and c3 can correspond to the outdoor ambient temperature T4, for example, when 20℃≥T4: a3 takes -5--5; b3 takes -8 --8; c3...

Embodiment 3

[0076] In this embodiment, the first detection object is the outdoor environment temperature T4. First, the operating frequency F is obtained according to the detected outdoor environment temperature T4, and the second throttling element is calculated according to the detected outdoor environment temperature T4 and the operating frequency F. Then adjust the opening of the second throttle element to the set opening.

[0077] Specifically, when the first detection object is the outdoor ambient temperature T4, the outdoor ambient temperature T4 is detected at the beginning of cooling; the compressor operating frequency F is determined according to T4, and the set opening degree Lr of the second throttle element is determined according to T4 and F; The set opening degree Lr=a5*F+b5+c5*T4; the value range of a5, b5, and c5 can correspond to the outdoor ambient temperature T4, for example, preset different outdoor ambient temperature intervals corresponding to different a5, b5 The valu...

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Abstract

The invention discloses an air conditioner only having a refrigeration function and a control method thereof. The air conditioner only having the refrigeration function comprises a double-cylinder compressor, an outdoor heat exchanger, an indoor heat exchanger, an air-liquid separator and a refrigerant heat sink; an air suction port of a first air cylinder is communicated with a first liquid storage device; the exhaust volume ratio of a second air cylinder to the first air cylinder ranges from 1% to 10%; the air-liquid separator comprises an air outlet, a first interface and a second interface; the air outlet is connected to the second air cylinder; a first throttling element with the fixed opening is connected between the first interface and the outdoor heat exchanger in series; and a second throttling element with an adjustable opening is connected between the second interface and the indoor heat exchanger in series; and the refrigerant heat sink is connected between the outdoor heat exchanger and the first throttling element in series. The energy efficiency of the air conditioner only having the refrigeration function is effectively improved.

Description

Technical field [0001] The invention relates to the field of refrigeration, in particular to a single-cooling type air conditioner and a control method thereof. Background technique [0002] The current air-conditioning refrigeration system does not optimize the cycle design of the gaseous refrigerant after throttling and before entering the evaporator, which causes the gaseous refrigerant to affect the heat exchange performance of the evaporator and increase the compression power consumption of the compressor, thereby affecting the energy efficiency of the air conditioner . Jet enthalpy and two-stage compression technology can improve the heating capacity of air-conditioning systems at low and ultra-low temperatures, but the energy efficiency improvement is very limited for the refrigeration conditions often used in air-conditioning. Summary of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/10F25B41/06F25B43/00F25B49/02F25B41/31
CPCF25B1/10F25B43/006F25B49/02F25B2700/2109F25B2700/2106F25B2700/21152F25B2500/09F25B41/34F25B41/37F25B41/30F25B41/31Y02B30/70
Inventor 孙兴刘湍顺杨亚新陈明瑜
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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