Building internal waste heat utilization method and central air conditioning system

A technology for air conditioning and waste heat, which is used in the field of waste heat utilization in buildings and central air conditioning systems, and can solve problems such as application constraints of multi-connected central air conditioning systems, and achieve the effects of reducing defrosting time, reducing frost degree and increasing evaporation temperature.

Active Publication Date: 2021-11-23
中冶南方武汉建筑设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, multi-connected central air-conditioning systems are widely used in small and medium-sized buildings and some public buildings. For buildings that require internal and external air-conditioning partitions, the application of multi-connected central air-conditioning systems is subject to certain restrictions.

Method used

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  • Building internal waste heat utilization method and central air conditioning system
  • Building internal waste heat utilization method and central air conditioning system
  • Building internal waste heat utilization method and central air conditioning system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 1, in winter, the inner area of ​​the air conditioner is cooling, and the cooling load of the air conditioner is Q1, and the outer area of ​​the air conditioner is heating, and the heat load of the air conditioner is Q2; the 4-axis power of the compressor is N; When the heat load of the air conditioner in the outer area is greater than or equal to that, the refrigerant enters the compressor 4, and the conduction direction of each of the four-way reversing valves is regulated, so that the refrigerator is divided into two paths after leaving the compressor 4, and one path enters the compressor 4. Describe the second air heat exchanger 2, the second air heat exchanger 2 performs the function of a condenser, releases heat Q2 to the outer area of ​​the air conditioner, and supplies heat to the outer area of ​​the air conditioner; the other way enters the third air heat exchanger 3 , the third air heat exchanger 3 performs the function of a condenser and releases h...

Embodiment 2

[0036] see figure 2 , in winter, the inner area of ​​the air conditioner is cooling, and the cooling load of the air conditioner is Q1, and the outer area of ​​the air conditioner is heating, and the heat load of the air conditioner is Q2; the 4-axis power of the compressor is N; When it is less than the heat load of the air conditioner in the outer zone, the refrigerant enters the compressor 4, and enters the second air heat exchanger 2 after being compressed by the compressor 4; the second air heat exchanger 2 performs the function of a condenser, Release heat Q2 to the outer area of ​​the air conditioner to supply heat to the outer area of ​​the air conditioner; the refrigerant enters the expansion valve 5 after releasing heat, and the refrigerant is divided into two paths after being expanded and throttled by the expansion valve 5; one path enters the first air exchange Heater 1, the first air heat exchanger 1 performs the function of an evaporator, absorbs heat Q1 from t...

Embodiment 3

[0038] see image 3 , in summer, the inner area of ​​the air conditioner is refrigerated, and the cooling load of the air conditioner is Q1, and the outer area of ​​the air conditioner is refrigerated, and the cooling load of the air conditioner is Q2; the 4-axis power of the compressor is N; Both the heat exchanger 1 and the second air heat exchanger 2 perform the function of the evaporator, and the third air heat exchanger 3 performs the function of the condenser; the refrigerant enters the compressor 4 and enters the third air after being compressed. Heat exchanger 3; the third air heat exchanger 3 performs the function of a condenser, releasing heat Q1+Q2+N from the outdoor air; the refrigerant enters the expansion valve 5 after releasing heat, and the refrigerant passes through the expansion joint of the expansion valve 5 After the flow, it is divided into two paths; one path enters the first air heat exchanger 1, and the first air heat exchanger 1 performs the function o...

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Abstract

The invention relates to a building internal waste heat utilization method. The building internal waste heat utilization method comprises the following steps that a first air heat exchanger is arranged in an air conditioner inner area, a second air heat exchanger is arranged in an air conditioner outer area, and a third air heat exchanger is arranged outdoors; the compressor communicates with the first air heat exchanger, the second air heat exchanger and the third air heat exchanger through a plurality of four-way reversing valves, and the conduction directions of all the four-way reversing valves are regulated and controlled to recycle heat in the inner area of the air conditioner, the invention further provides a central air conditioning system which comprises the first air heat exchanger, a second air-conditioning heat exchanger, the third air heat exchanger and four four-way reversing valves, and the four-way reversing valves communicate with the compressor, an expansion valve, the first air heat exchanger, the second air heat exchanger and the third air heat exchanger. According to the building internal waste heat utilization method and the central air conditioning system, the requirements for air conditioner inner area refrigeration and air conditioner outer area heating can be met at the same time, the heat is recovered from the air conditioner inner area for air conditioner outer area heating, energy heat recovery is achieved, and the interior of a building is the air conditioner inner area.

Description

technical field [0001] The invention relates to the technical field of energy-saving air conditioning for recovering waste heat inside a building, in particular to a method for utilizing waste heat inside a building and a central air-conditioning system. Background technique [0002] The multi-connected central air-conditioning system is popular in domestic and foreign markets due to its advantages of high intelligence, low operating cost and unattended operation. At present, multi-connected central air-conditioning systems are widely used in small and medium-sized buildings and some public buildings. For buildings that require internal and external air-conditioning partitions, the application of multi-connected central air-conditioning systems is subject to certain restrictions. [0003] To sum up, how to use the multi-connected central system to recover the waste heat inside the building is one of the key factors affecting the application of the multi-connected central air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F12/00F24F13/30F25B13/00F25B41/20F25B41/31
CPCF24F12/00F24F13/30F25B13/00F25B41/20F25B41/31F25B2313/027
Inventor 黄艾星曹石刘颖杰袁琦刘欢周诚熊瑶吴倩怡
Owner 中冶南方武汉建筑设计有限公司
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