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Refrigerating and heating type air conditioner 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

Inactive Publication Date: 2016-07-13
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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  • Refrigerating and heating type air conditioner and control method thereof
  • Refrigerating and heating type air conditioner and control method thereof
  • Refrigerating and heating type air conditioner and control method thereof

Examples

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Effect test

Embodiment 1

[0072] In this embodiment, the first detection object and / or the second detection object are the outdoor ambient temperature T4 and the exhaust gas temperature. First, the operating frequency F is obtained according to the detected outdoor ambient temperature T4, and Calculate the set exhaust temperature with the operating frequency F, and then adjust the opening of the second throttling element so that the detected exhaust temperature reaches the set exhaust temperature. It can be understood that the calculation formula is preset in the electric control element of the heating and cooling air conditioner, and the calculation formula can be specifically defined according to the actual situation.

[0073] 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 determined according to T4, and the...

Embodiment 2

[0083] In this embodiment, the first detection object and / or the second detection object are the outdoor ambient temperature T4 and the exhaust pressure. First, the operating frequency F is obtained according to the detected outdoor ambient temperature T4, and Calculate the set exhaust pressure with the operating frequency F, and then adjust the opening of the second throttling element so that the detected exhaust pressure reaches the set exhaust pressure.

[0084] 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 takes -5--5; b3 takes -8 --8; take -...

Embodiment 3

[0091]In this embodiment, the first detection object and / or the second 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 operating frequency F is obtained according to the detected outdoor ambient temperature T4 and the operating frequency F The set opening degree of the second throttling element is obtained through calculation, and then the opening degree of the second throttling element is adjusted to the set opening degree.

[0092] Specifically, when the first detection object is the outdoor ambient temperature T4, detect the outdoor ambient temperature T4 when cooling starts; determine the operating frequency F of the compressor according to T4, and determine the set opening degree Lr of the second throttling element 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 ambie...

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Abstract

The invention discloses a refrigerating and heating type air conditioner and a control method thereof. The refrigerating and heating type air conditioner comprises a duplex-cylinder compressor, a commutation assembly, an outdoor heat exchanger, an indoor heat exchanger, an air-liquid separator, and a coolant radiator, wherein an air suction port of a first cylinder is communicated with a first liquid storage device, and the numeric range of the exhaust volume ratio of a second cylinder to the first cylinder is 1%-10%; the commutation assembly comprises a first valve port, a second valve port, a third valve port and a fourth valve port, and the fourth valve port is connected with the first liquid storage device; the air-liquid separator comprises an air outlet, a first interface and a second interface, the air outlet is connected with the second cylinder, and a first throttling element with a fixed opening degree is connected between the first interface and the outdoor heat exchanger in series; a second throttling element with an adjustable opening degree is connected between the second interface and the indoor heat exchanger in series. The coolant radiator is connected between the air outlet and the air suction port of the second cylinder in series. The refrigerating and heating type air conditioner disclosed by the invention can effectively improve the energy efficiency of the air conditioner.

Description

technical field [0001] The invention relates to the refrigeration field, in particular to a heating and cooling 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 lea...

Claims

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Application Information

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IPC IPC(8): F25B1/10F25B13/00F25B49/02F25B43/00
CPCF25B1/10F25B13/00F25B43/006F25B49/022F25B2700/2106F25B2700/21152
Inventor 戚文端李金波曾祥兵刘湍顺杨亚新白军辉
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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