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Multiple refrigeration system and its control method

A multi-connected refrigeration and control method technology, applied in heating and ventilation control systems, control input related to air characteristics, air conditioning systems, etc., can solve the problems of high refrigerant circulation, large volume of indoor units, and low heat exchange efficiency , to avoid energy waste, small size, high heat transfer efficiency

Active Publication Date: 2017-03-22
SHENZHEN ITEAQ TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current multi-connected refrigeration system, especially in the multi-connected refrigeration units used in computer rooms, data centers, etc., such as air-cooled chillers and water-cooled chillers, all use chilled water or ethylene glycol to transport cooling capacity. There are the following outstanding problems in the cooling capacity of refrigerant delivery: first, more refrigerant is required; Low thermal efficiency
Moreover, in the current refrigeration system, the indoor unit has a large volume, low efficiency, and low energy efficiency ratio.

Method used

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  • Multiple refrigeration system and its control method
  • Multiple refrigeration system and its control method
  • Multiple refrigeration system and its control method

Examples

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Embodiment 1

[0059] Figure 1-Figure 4 The multi-series refrigeration system in this embodiment is shown, and the multi-series refrigeration system includes at least one indoor refrigeration unit 10, at least one outdoor refrigeration unit 20, and a cold delivery unit for connecting the indoor refrigeration unit 10 and the outdoor refrigeration unit 20 30. Specifically, at least one indoor refrigeration unit 10 includes at least two indoor refrigeration units 10 arranged in parallel. It can be understood that at least two indoor refrigeration units 10 are arranged in parallel, so that the indoor refrigeration units 10 do not affect each other; the number of each indoor refrigeration unit 10 is determined according to user needs, and the number of outdoor refrigeration units 20 is determined according to the indoor refrigeration unit. 10 Determination of required cooling requirements.

[0060] like Figure 1-Figure 4 As shown, the cooling delivery unit 30 includes a liquid storage device...

Embodiment 2

[0075] Figure 5 The control method of the multi-series refrigeration system in this embodiment is shown, and the control method includes the following steps executed by the first control unit 13:

[0076] S11: The first control unit 13 acquires the indoor cooling demand CFr1, the indoor outlet superheat SHr1 of the indoor evaporator 12, and the pressure difference value ΔP before and after the delivery pump 32 in real time. Specifically, step S11 includes: obtaining the indoor cooling demand CFr1 by collecting the indoor ambient temperature T1, comparing the indoor ambient temperature T1 with the first preset temperature value Tset1, and calculating the temperature difference between them as the indoor cooling demand CFr1. The indoor outlet superheat SHr1 of the indoor evaporator 12 is determined by collecting the second outlet temperature T2 and / or the second outlet pressure P1 at the outlet of the indoor evaporator 12, and calculating according to the superheat calculation ...

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Abstract

A multi-connection refrigeration system, comprising at least one indoor refrigerating unit (10), at least one outdoor refrigerating unit (20), and a cold energy transfer unit (30) connecting the indoor refrigerating unit (10) to the outdoor refrigerating unit (20). The cold energy transfer unit (30) comprises a liquid storage device (31) for storing a phase-change refrigerant, and a transporting pump (32) connected to the liquid storage device (31). The outdoor refrigerating unit (20) comprises a recuperative heat exchanging unit (21) comprising a first heat exchanging pipe (211) and a second heat exchanging pipe (212) independent of each other and used to exchange heat. The outdoor refrigerating unit (20) further comprises a compressor (22), a condensing device (23), a second flow control valve (24) and a second control portion (25). The indoor refrigerating unit (10) comprises a first flow control valve (11), an indoor evaporator (12) and a first control portion (13). The indoor refrigerating unit (10), the cold energy transfer unit (30) and the first heat exchanging pipe (211) form a closed cycle. Also provided is a control method of the multi-connection refrigeration system. The multi-connection refrigeration system and the control method enable a high heat exchange efficiency, have a simple structure and a convenient and simple system control process, and effectively reduce energy waste.

Description

technical field [0001] The invention relates to the field of refrigeration systems, in particular to a multi-connected refrigeration system and a control method thereof. Background technique [0002] The current multi-connected refrigeration system, especially in the multi-connected refrigeration units used in computer rooms, data centers, etc., such as air-cooled chillers and water-cooled chillers, all use chilled water or ethylene glycol to transport cooling capacity. There are the following outstanding problems in the cooling capacity of refrigerant delivery: first, more refrigerant is required; Low thermal efficiency. Moreover, in the current refrigeration system, the indoor unit has a large volume, low efficiency, and low energy efficiency ratio. With the increasing requirements of national energy conservation and emission reduction policies, improving efficiency and saving resources has become an important direction for the development of refrigeration systems. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F5/00F24F11/02
CPCF24F1/16F24F13/30F24F11/30F24F11/62F24F11/64F24F11/89F24F2110/00F24F2140/20F25B41/20F24F5/00
Inventor 黄志超黄桂良胡荣国
Owner SHENZHEN ITEAQ TECH CO LTD