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 energy efficiency level of air conditioners, increasing the compression power consumption of compressors, affecting the heat exchange performance of evaporators, 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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Experimental program
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Effect test

Embodiment 1

[0065] In this embodiment, the first detection object is the outdoor ambient temperature T4 and the exhaust gas temperature. Firstly, 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 operating frequency F. Set the exhaust temperature, and then adjust the opening degree of the first throttling element so that the detected exhaust temperature reaches the set exhaust temperature. It can be understood that the calculation formula is pre-set in the electronic control element of the cooling-only air conditioner, and the calculation formula can be specifically defined according to the actual situation.

[0066] 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 refrigeration is turned on, the operating frequency F of the compressor is de...

Embodiment 2

[0072] In this embodiment, the first detection object is the outdoor ambient temperature T4 and the exhaust pressure. Firstly, 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 operating frequency F. Set the exhaust pressure, and then adjust the opening degree of the first throttling element so that the detected exhaust pressure reaches the set exhaust pressure.

[0073] 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 refrigeration 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; Among them, 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 ...

Embodiment 3

[0078] In this embodiment, the first detection object is the outdoor ambient temperature T4. First, the operating frequency F is obtained according to the detected outdoor ambient temperature T4, and the first throttling element is calculated according to the detected outdoor ambient temperature T4 and operating frequency F. The set opening degree, and then adjust the opening degree of the first throttling element to the set opening degree.

[0079] Specifically, when the first detection object is the outdoor ambient temperature T4, the outdoor ambient temperature T4 is detected when cooling starts; the operating frequency F of the compressor is determined according to T4, and the set opening degree Lr of the first throttling element is determined according to T4 and F; Wherein the set opening Lr=a5*F+b5+c5*T4; wherein the value ranges of a5, b5, and c5 can correspond to the outdoor ambient temperature T4, for example, different preset outdoor ambient temperature ranges corresp...

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PUM

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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 an adjustable opening is connected between the first interface and the outdoor heat exchanger in series; and a second throttling element with a fixed opening is connected between the second interface and the indoor heat exchanger in series; and the refrigerant heat sink is connected between the first throttling element and the first interface in series or is connected between the second throttling element and the second interface 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 refrigeration field, in particular to a cooling-only 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 transfer performance of the evaporator and increase the compression power consumption of the compressor, thereby 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 the energy efficiency improvement is very limited for cooling conditions where air conditioners are often used. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/10F25B49/02F25B41/06F25B43/00F25B41/31
CPCF25B1/10F25B43/006F25B49/02F25B2600/2513F25B2700/171F25B2700/151F25B2700/1931F25B2700/2106F25B2700/21152F25B41/31
Inventor 杨亚新李金波陈明瑜任超孙兴魏洪涛
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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