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Multi-connected refrigerating system with natural cooling function, and control method thereof

A multi-connected refrigeration and control method technology, which is applied to heating and ventilation control systems, control inputs involving air characteristics, air conditioning systems, etc., can solve the problems of inability to meet energy conservation and emission reduction, low energy efficiency of refrigeration systems, and low energy efficiency ratios, etc. Achieve the effect of small footprint, improved refrigeration energy efficiency, compact and lightweight structure

Active Publication Date: 2015-07-15
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 with natural cooling, 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 compressors as refrigeration power refrigeration systems. When the outdoor temperature is low, the energy efficiency of the compressor refrigeration system is relatively low, which easily leads to energy waste and cannot meet the national energy conservation and emission reduction requirements
Moreover, the current indoor units are large in size and low in energy efficiency, which cannot well meet the needs of users.

Method used

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  • Multi-connected refrigerating system with natural cooling function, and control method thereof
  • Multi-connected refrigerating system with natural cooling function, and control method thereof
  • Multi-connected refrigerating system with natural cooling function, and control method thereof

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Embodiment 1

[0059] Figure 1-Figure 4 It shows the multi-series refrigeration system with natural cooling in this embodiment, the multi-series refrigeration system with natural cooling includes at least one indoor refrigeration unit 10, at least one outdoor refrigeration unit 20, and a The cold delivery unit 30 of the refrigeration unit 20 . 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] Such as Figure 1-Figure 4 As shown, the cooling delivery unit 30 includes a liquid storage device 31 for sto...

Embodiment 2

[0075] Figure 5 The control method of the multi-series refrigeration system with natural cooling 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 s...

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Abstract

The invention discloses a multi-connected refrigerating system with a natural cooling function, and a control method of the multi-connected refrigerating system. The system comprises at least one indoor refrigeration unit, at least one outdoor refrigeration unit and cooling capacity conveying unit(s), wherein each cooling capacity conveying unit is used for connecting each indoor refrigeration unit and the corresponding outdoor refrigeration unit; each cooling capacity conveying unit comprises a liquid storage device used for storing a refrigerant, and a delivery pump connected with the liquid storage device; each outdoor refrigeration unit comprises a dividing wall type heat exchange unit; each dividing wall type heat exchange unit comprises a first heat exchange pipeline and a second heat exchange pipeline which are independent of each other and are used for exchanging heat; each outdoor refrigeration unit also comprises a compressor, a condensing unit, a refrigerant pump and a second control part; each indoor refrigeration unit comprises a first flow control valve, an indoor evaporator and a first control part; a closed cycle is formed by the indoor refrigeration unit, the cooling capacity conveying unit and the first heat exchange pipeline. The multi-connected refrigerating system is high in heat exchange efficiency, simple in structure and convenient and easy to control, and is capable of effectively avoiding energy waste.

Description

technical field [0001] The invention relates to the field of refrigeration systems, in particular to a multi-connected refrigeration system with natural cooling and a control method thereof. Background technique [0002] The current multi-connected refrigeration system with natural cooling, especially in multi-connected refrigeration units used in computer rooms, data centers, etc., such as air-cooled chillers and water-cooled chillers, all use compressors as cooling power. When the outdoor temperature is low, the energy efficiency of the compressor refrigeration system is relatively low, which easily leads to energy waste and cannot meet the national energy conservation and emission reduction requirements. Moreover, the current indoor unit has a large volume and a low energy efficiency ratio, which cannot well meet the needs of users. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an improved multi-connected r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F5/00F24F11/02
CPCF24F3/065F24F11/30F24F11/77F24F11/83F24F11/84F24F11/85F24F2110/00F24F5/00F24F11/89Y02B30/70
Inventor 黄志超李佳蔡勃
Owner SHENZHEN ITEAQ TECH CO LTD
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