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Air conditioning unit based on supercooling and reheating

An air-conditioning unit and supercooling technology, which is applied in the direction of refrigerators, air-conditioning systems, refrigeration components, etc., can solve the problems of complex pipeline design, difficult air valve control, and complicated air volume adjustment in the secondary return air system, so as to improve refrigeration efficiency, Simple system design and control design, independent and precise control effect

Active Publication Date: 2016-06-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The primary return air system needs to reheat the air supply, which consumes a lot of energy; compared with the primary return air system, the secondary return air system does not require reheating equipment and has higher energy efficiency, but the secondary return air system has complex pipeline design and difficult air valve control
Moreover, when the outdoor temperature deviates from the design operating point, the air volume adjustment is complicated, and there are many problems in practice
[0004] Therefore, both types of systems commonly used have their own limitations

Method used

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  • Air conditioning unit based on supercooling and reheating
  • Air conditioning unit based on supercooling and reheating
  • Air conditioning unit based on supercooling and reheating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] An air conditioning unit based on subcooling and reheating, used to adjust the temperature in the air-conditioned space 23, such as figure 1 Shown is a heat recovery device with fresh air.

[0038] The air conditioning unit of this embodiment includes a compressor 1, a condenser 2, a throttling device 7, an evaporator 8, a subcooler 4, a supply air fan 22, a return air fan 24, an air heat recovery device 19, a fresh air outlet 20 and exhaust Tuyere 27, No. 1 three-way valve 3, No. 2 three-way valve 6, first damper 21, second damper 25, third damper 26, refrigerant connecting pipes 10, 11, 12, 13, 14, 15, 16, 17, 18, air duct 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53. Both the evaporator 8 and the subcooler 4 have a refrigerant channel and an air channel;

[0039] The refrigerant passages of the compressor 1, the condenser 2, the throttling device 7, and the evaporator 8 are connected end to end through a refrigerant connecting pipe to form a refrigerant circula...

Embodiment 2

[0048] Such as figure 2 As shown, the difference from Embodiment 1 is that the air conditioning unit in this embodiment does not have a fresh air heat recovery device, and the working principle is the same as that of Embodiment 1, except that it does not have an air heat recovery device.

[0049] The refrigerant circuit is exactly the same as in the first embodiment.

[0050] In the air flow path, outdoor fresh air is sucked in from the fresh air inlet 20, passes through the air pipe 40, the first air valve 21, and the air pipe 41, and is mixed with the return air from the air pipe 49 in the air pipe 42. The mixed air is first sent to the evaporator 8 for cooling and dehumidification, and then sent to the subcooler 4 through the air duct 43 to be heated to a specified temperature. The heat and humidity treated air is sent into the indoor space 23 through the air duct 44, the air blower 22, and the air duct 45. At the same time, the air in the indoor space 23 is drawn out through ...

Embodiment 3

[0053] A brand-new air conditioning unit based on subcooling and reheating. The structure and process are as follows image 3 As shown, the working principle is similar to Embodiment 1, except that the fresh air is no longer mixed with the return air and the heat and moisture treatment is directly performed.

[0054] The refrigerant circuit is exactly the same as in the first embodiment.

[0055] In the air flow path, outdoor fresh air is sucked in from the fresh air outlet 20, enters the air heat recovery device 19 through the air duct 40, and is pre-cooled in the air heat recovery device 19. Subsequently, the pre-cooled fresh air is first sent to the evaporator 8 through the air duct 41 to cool and dehumidify, and then sent to the subcooler 4 through the air duct 42 to be heated to a specified temperature. The heat and humidity treated air is sent into the indoor space 23 through the air duct 43, the air blower 22, and the air duct 44. At the same time, the air in the indoor sp...

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Abstract

The invention relates to an air conditioning unit based on supercooling and reheating. The air conditioning unit is used for regulating temperature and humidity in air conditioning space and comprises a compressor, a condenser, a throttling device, an evaporator, a supercooler, an air supply fan, an air return fan, a fresh air opening, an exhaust opening, refrigerating fluid connecting pipes and air pipes. The air conditioning unit is provided with a refrigerating fluid circulating loop and an air flow path in total. The cooling capacity of low-temperature air at an outlet of the evaporator is recycled through the supercooler, so that on the one hand, a reheating effect is achieved, and on the other hand, the supercooling degree of a refrigerating system is improved, and the energy efficiency of the system is improved. Compared with the prior art, a primary return air pipeline is arranged, so that system design and control design are simple. According to the air conditioning unit, additional energy does not need to be consumed to reheat air, and independent and precise control over temperature and humidity can be achieved. According to the air conditioning unit, by means of the cooling capacity recycled by the supercooler, the refrigerating capacity of the unit mass flow rate of the refrigerating system is improved, and refrigerating efficiency is improved.

Description

Technical field [0001] The invention relates to an air conditioning unit, in particular to an air conditioning unit based on supercooling and reheating. Background technique [0002] In centralized air conditioning systems and local air conditioning units, the most commonly used are the primary return air system (the return air is mixed with the outdoor fresh air before cooling and dehumidification) and the secondary return air system (the return air and the fresh air are mixed and then cooled and dehumidified, and then combined with the return air again. Wind mixing). [0003] The primary return air system needs to reheat the air supply, which consumes more energy; compared with the primary return air system, the secondary return air system does not require reheating equipment and has higher energy efficiency. However, the secondary return air system has a complicated piping design and difficult air valve control. . And when the outdoor temperature deviates from the design opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F5/00F24F12/00F25B41/04F25B41/20
CPCF24F5/001F24F12/006F25B41/20
Inventor 曹祥张春路邵亮亮杨智
Owner TONGJI UNIV
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