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Utilization method of waste heat inside building and central air-conditioning system

An air-conditioning and waste heat technology, which is applied in air-conditioning systems, ventilation systems, heating methods, etc., can solve problems such as application constraints of multi-connected central air-conditioning systems, and achieve the goal of reducing defrosting time, reducing frosting degree, and improving comprehensive performance coefficient Effect

Active Publication Date: 2022-07-22
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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  • Utilization method of waste heat inside building and central air-conditioning system
  • Utilization method of waste heat inside building and central air-conditioning system
  • Utilization method of waste heat inside building and central air-conditioning system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 1, in winter, the cooling load of the air conditioner is Q1 in the inner area of ​​the air conditioner, and the heating load of the air conditioner in the outer area is Q2; the 4-shaft power of the compressor is N; When it is greater than or equal to the heat load of the air conditioner in the external area, 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 exiting the compressor 4, and one path enters the compressor 4. 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 functions as a condenser to release heat Q1+N-Q to the outside; when Q1+N=Q2, the refrigerant does not ent...

Embodiment 2

[0036] see figure 2 , in winter, the cooling load of the air conditioner is Q1 in the inner area of ​​the air conditioner, and the heating load of the air conditioner in the outer area is Q2; the 4-shaft power of the compressor is N; When the heat load of the air conditioner in the outer area is less than that of the external air conditioner, the refrigerant enters the compressor 4, and after being compressed by the compressor 4, enters the second air heat exchanger 2; the second air heat exchanger 2 functions as a condenser, Heat Q2 is released to the outer area of ​​the air conditioner, and heat is supplied to the outer area of ​​the air conditioner; after the refrigerant releases heat, it enters the expansion valve 5, and the refrigerant is expanded and throttled by the expansion valve 5 and divided into two paths; 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 the inner area of ​...

Embodiment 3

[0038] see image 3 , in summer, the inner area of ​​the air conditioner is refrigerated, the cooling load of the air conditioner is Q1, the outer area of ​​the air conditioner is refrigerated, and the cooling load of the air conditioner is Q2; the 4-shaft power of the compressor is N; when both the inner and outer areas of the air conditioner are cooled, the first air heat exchange Both the evaporator 1 and the second air heat exchanger 2 function as evaporators, and the third air heat exchanger 3 functions as a condenser; the refrigerant enters the compressor 4 and enters the third air after being compressed Heat exchanger 3; the third air heat exchanger 3 functions as a condenser to release heat Q1+Q2+N from the outdoor air; after the refrigerant releases heat, it enters the expansion valve 5, and the refrigerant passes through the expansion valve 5 expansion joint After the flow, it is divided into two paths; one path enters the first air heat exchanger 1, and the first ai...

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Abstract

The invention relates to a method for utilizing waste heat inside a building, comprising the steps of: arranging a first air heat exchanger in an inner area of ​​an air conditioner, arranging a second air heat exchanger in an outer area of ​​the air conditioner, and arranging a third air heat exchanger outdoors; A plurality of four-way reversing valves are used to connect the compressor with the first air heat exchanger, the second air heat exchanger and the third air heat exchanger; the conduction direction of each four-way reversing valve is regulated to recover the air in the inner area of ​​the air conditioner. heat. A central air conditioning system is also provided, comprising a first air heat exchanger, a second air heat exchanger, a third air heat exchanger and four four-way reversing valves, each of which is connected to a compressor and an expansion valve. And the first air heat exchanger, the second air heat exchanger, and the third air heat exchanger. The present invention can meet the requirements of cooling in the inner area of ​​the air conditioner and heating in the outer area of ​​the air conditioner at the same time, recovering heat from the inner area of ​​the air conditioner for heating the outer area of ​​the air conditioner, and realizing energy heat recovery, wherein the interior of the building is the inner area of ​​the air conditioner.

Description

technical field [0001] The invention relates to the technical field of air-conditioning energy saving for recovering waste heat inside buildings, in particular to a method for utilizing waste heat inside buildings and a central air-conditioning system. Background technique [0002] Multi-connected central air-conditioning systems are popular in domestic and foreign markets due to their high intelligence, low operating costs 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, 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-conditioning system in bu...

Claims

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Application Information

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Patent Type & Authority Patents(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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