Cooling system and cooling method

Patent metadata

Field	Value
Publication number	US-2018259232-A1
Application number	US-201515760345-A
Country	US
Kind code	A1
Filing date	Sep 21, 2015
Priority date	Sep 25, 2015
Publication date	Sep 13, 2018
Grant date	—

Abstract

A cooling system which combines a plurality of refrigeration cycles has a fluctuating cooling capacity. Therefore, a cooling system according to the present invention includes: a first cooling means including a first refrigerant transportation means for circulating a refrigerant that receives heat from an object to be cooled; a second refrigerant transportation means connected to the first refrigerant transportation means, for circulating a diverted refrigerant being a part of the refrigerant; a second cooling means for receiving heat from the refrigerant circulating through the first refrigerant transportation means, and cooling the diverted refrigerant; and a flowrate control means for controlling a flowrate of the diverted refrigerant.

First claim

1 . A cooling system comprising:
a first cooling unit including a first refrigerant transportation unit circulating a refrigerant that receives heat from an object to be cooled; a second refrigerant transportation unit connected to the first refrigerant transportation unit, circulating a diverted refrigerant being a part of the refrigerant; a second cooling unit receiving heat from the refrigerant circulating through the first refrigerant transportation unit, and cooling the diverted refrigerant; and a flowrate control unit controlling a flowrate of the diverted refrigerant.

2 . The cooling system according to claim 1 , wherein
the flowrate control unit is a flowrate control valve located within a flow path configured by the first refrigerant transportation unit.

3 . The cooling system according to claim 1 , wherein
the flowrate control unit is a flowrate control valve located within a flow path configured by the second refrigerant transportation unit.

4 . The cooling system according to claim 1 , wherein
the flowrate control unit controls a flowrate of the diverted refrigerant in such a way that a temperature difference of the diverted refrigerant before and after being cooled by the second cooling unit is within a predetermined range.

5 . The cooling system according to claim 4 , wherein
the flowrate control unit increases a flowrate of the diverted refrigerant when the temperature difference is beyond the predetermined range, and decreases a flowrate of the diverted refrigerant when the temperature difference is within the predetermined range.

6 . The cooling system according to claim 1 , wherein
the first cooling unit configures a vapor compression refrigeration cycle, and includes
an evaporation unit generating refrigerant vapor resulting from the refrigerant that receives heat and is vaporized,
a compression unit generating high-pressure refrigerant vapor by compressing the refrigerant vapor,
a condensation unit condensing the high-pressure refrigerant vapor and generating high-pressure refrigerant liquid, and
an expansion unit generating low-pressure refrigerant liquid by expanding the high-pressure refrigerant liquid,
the first refrigerant transportation unit configures a flow path of the refrigerant flowing back to the evaporation unit from the evaporation unit via the compression unit, the condensation unit, and the expansion unit, and the second refrigerant transportation unit configures a flow path which circulates the diverted refrigerant from between the evaporation unit and the compression unit to between the evaporation unit and the expansion unit.

7 . The cooling system according to claim 6 , further comprising
a heat exchange unit exchanging heat between the diverted refrigerant and a refrigerant on a cooling side of the second cooling unit, wherein
the condensation unit exchanges heat between the high-pressure refrigerant vapor and a refrigerant on a heat receiving side of the second cooling unit.

8 . The cooling system according to claim 7 , wherein
the heat exchange unit is located above the evaporation unit.

9 . The cooling system according to claim 1 , wherein
the second cooling unit configures one of an adsorption refrigeration cycle and an absorption refrigeration cycle.

10 . The cooling system according to claim 1 , further comprising:
a drive unit circulating the diverted refrigerant in a flow path of the diverted refrigerant configured by the second refrigerant transportation unit.

11 . A cooling method comprising:
circulating a refrigerant that receives heat from an object to be cooled; diverting a part of the refrigerant, and circulating the diverted refrigerant; receiving heat from the refrigerant and cooling the diverted refrigerant; and controlling a flowrate of the diverted refrigerant in such a way that a cooling capacity for the object to be cooled is substantially constant.

12 . The cooling method according to claim 11 , further comprising
controlling a flowrate of the diverted refrigerant in such a way that a temperature difference of the diverted refrigerant at preliminary and subsequent stages of a process of cooling the diverted refrigerant is substantially constant.

13 . The cooling method according to claim 12 , further comprising:
increasing a flowrate of the diverted refrigerant when the temperature difference is greater than a predetermined value; and decreasing a flowrate of the diverted refrigerant when the temperature difference is smaller than a predetermined value.

14 . The cooling method according to claim 11 , further comprising
desorbing an adsorbent by receiving heat from the refrigerant, and cooling the diverted refrigerant by evaporating the desorbed adsorbent.

Assignees

• Nec Corp

Inventors

• Sakuma Hisato
• Yano Masato
• Yoshikawa Minoru
• Chiba Masaki

Classifications

• F25B13/00

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title

• F25B29/003

  of the compression type system · CPC title

• F25B41/06

  Mechanical Engineering · mapped topic

• F25B15/16

  using desorption cycle {(F25B15/004, F25B15/006, F25B15/008 take precedence)} · CPC title

• F25B29/006 Primary

  of the sorption type system · CPC title