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 the problems of increasing the compression power consumption of compressors, affecting the heat exchange performance of evaporators, affecting the energy efficiency level of air conditioners, etc. The effect of compressing power consumption, optimizing 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

Examples

Experimental program
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Effect test

Embodiment 1

[0067] In this embodiment, the first detection object and the second detection object are both the outdoor ambient temperature T4 and the operating frequency F, and the first throttling element and the second throttling element are calculated according to the detected outdoor ambient temperature T4 and operating frequency F The set opening degree of the element, and then adjust the corresponding opening degrees of the first throttling element and the second throttling element according to the set opening degree.

[0068] 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.

[0069] Specifically, during cooling, the relationship between the opening degree LA_cool_1 of the first throttling element, the outdoor ambient temperature T4 and the operating frequency F is: LA_cool_1=a 1 ·F+b 1 T 4 +c 1 , when the ca...

Embodiment 2

[0074] In this embodiment, the first detection object is the outdoor ambient temperature T4 and the operating frequency F, first calculate the set opening degree of the first throttling element according to the outdoor ambient temperature T4 and operating frequency F, and then adjust according to the set opening degree the opening degree of the first throttling element;

[0075] The second detection object is outdoor ambient temperature T4, operating frequency F and exhaust pressure; Constant exhaust pressure or set exhaust temperature, and then adjust the opening degree of the second throttling element according to the actually detected exhaust pressure or exhaust temperature so that the detected exhaust pressure or exhaust temperature reaches the set exhaust gas temperature. pressure or set discharge temperature.

[0076] Specifically, during cooling, the relationship between the opening degree LA_cool_1 of the first throttling element, the outdoor ambient temperature T4 an...

Embodiment 3

[0081] In this embodiment, a plurality of outdoor temperature intervals are preset, and each outdoor temperature interval corresponds to a different opening degree of the throttling element. The first detection object is the outdoor ambient temperature T4. According to the location where the actually detected outdoor ambient temperature T4 is The opening value corresponding to the outdoor temperature range adjusts the opening of the first throttling element;

[0082] The second detection object is outdoor ambient temperature T4, operating frequency F and exhaust pressure; Determine the exhaust pressure or set the exhaust temperature, and then adjust the opening of the second throttling element according to the actual detected exhaust pressure or exhaust temperature so that the detected exhaust pressure or exhaust temperature reaches the set exhaust pressure or Set the discharge temperature.

[0083] Specifically, when cooling, the specific conditions of the opening of the fir...

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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 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 air outlet and the air suction port of the second air cylinder 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, 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 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 to a...

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
CPCF25B1/10F25B43/006F25B49/02F25B2700/151F25B2700/171F25B2700/1931F25B2700/2106F25B2700/21152F25B2600/2513F25B41/31
Inventor 刘湍顺李金波戚文端杨亚新陈明瑜任超孙兴
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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