CN209877234U - Centralized cold source refrigeration cycle system - Google Patents
Centralized cold source refrigeration cycle system Download PDFInfo
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- CN209877234U CN209877234U CN201920246350.4U CN201920246350U CN209877234U CN 209877234 U CN209877234 U CN 209877234U CN 201920246350 U CN201920246350 U CN 201920246350U CN 209877234 U CN209877234 U CN 209877234U
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Abstract
The utility model discloses a centralized cold source refrigeration cycle system, which comprises a direct refrigeration unit and a centralized cold source unit; the direct refrigeration unit comprises a refrigerant pump, a liquid storage device, a water-cooled condenser A, an evaporator and a throttling element A; the centralized cold source unit comprises a cooling tower, a water-cooled condenser B, a throttling element B, a water-fluorine heat exchanger, a compressor and a three-way valve I/II/III/IV; the water-cooled condenser B, the throttling element B, the water-fluorine heat exchanger and the compressor are sequentially connected to form a refrigerant circulation loop; the three-way valve I/II is arranged on a pipeline connected with the water-cooled condenser B and the cooling tower, the three-way valve III/IV is arranged on a pipeline connected with the water-cooled condenser A and the water-fluorine heat exchanger, the three-way valve I is connected with the three-way valve IV, and the three-way valve II is connected with the three-way valve III. The utility model discloses an outdoor centralized cold source unit provides the cold source for the system, cancels indoor compressor, has reduced the unit energy consumption, and can make full use of outdoor natural cold source, improves the unit efficiency ratio all the year to reach energy-conserving purpose.
Description
Technical Field
The utility model belongs to the technical field of the refrigeration, concretely relates to centralized cold source refrigeration cycle system.
Background
With the rapid development of the communication industry in China and the wide use of 4G and even 5G, communication base stations and machine rooms are developed on a large scale, and the problem of energy consumption of communication enterprises is more and more prominent. According to the statistical data, the electricity consumption of the air conditioner in the machine room accounts for more than 40% of the total electricity consumption of the machine room. Due to the particularity of the air conditioning environment of the machine room, the machine room needs to be refrigerated all the year round in 365 days. The natural cold air outside the machine room in part of the whole year is a huge natural cold source, and if the natural cold air can be reasonably utilized, the energy conservation of the air conditioner in the machine room has a large space.
At present, conventional machine room air conditioning systems are divided into an air-cooled refrigeration system, a water-cooled refrigeration system, a chilled water refrigeration system, a fluorine pump dual-cycle refrigeration system and the like. The air-cooled refrigeration system and the water-cooled refrigeration system adopt the compressor to refrigerate all the year round, and the system has high energy consumption and high power consumption. The hidden danger of water entering a machine room exists in a refrigeration water type refrigeration system. The fluorine pump double-circulation refrigeration system utilizes a natural cold source, but has lower utilization efficiency for regions with higher outdoor temperature in south China. In addition, for the occasions where the condenser is concentrated and is easy to generate the heat island effect, although the outdoor temperature is low, the air inlet temperature of the condenser is high due to the heat island effect; the time for actually using the fluorine pump is short.
SUMMERY OF THE UTILITY MODEL
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the utility model aims to provide a centralized cold source refrigeration cycle system, which provides a cold source for the system through an outdoor centralized cold source unit, cancels an indoor compressor and reduces the energy consumption of the unit; the outdoor natural cold source is fully utilized, the annual energy efficiency ratio of the unit is improved, and therefore the purpose of energy conservation is achieved.
The technical scheme is as follows: in order to achieve the purpose, the utility model adopts the following technical scheme:
a centralized cold source refrigeration cycle system comprises a direct refrigeration unit and a centralized cold source unit; the direct refrigeration unit comprises a refrigerant pump, a liquid storage device, a water-cooled condenser A, an evaporator and a throttling element A which are sequentially connected to form a direct refrigeration circulating system; the centralized cold source unit comprises a cooling tower, a water-cooled condenser B, a throttling element B, a water-fluorine heat exchanger, a compressor and a three-way valve I/II/III/IV; the water-cooled condenser B, the throttling element B, the water-fluorine heat exchanger and the compressor are sequentially connected to form a refrigerant circulation loop; the port A of the three-way valve I is connected with a cooling water inlet of the water-cooled condenser B, the port B is connected with a cooling water outlet of the cooling tower, the port A of the three-way valve II is connected with a cooling water outlet of the water-cooled condenser B, and the port B is connected with a cooling water inlet of the cooling tower; the port A of the three-way valve III is connected with a cooling water outlet of the water-cooled condenser A, the port B is connected with the port C of the three-way valve II, the port A of the three-way valve IV is connected with a cooling water inlet of the water-cooled condenser A, and the port B is connected with the port C of the three-way valve I; and the port C of the three-way valve III is connected with a water return port of the water-fluorine heat exchanger, and the port C of the three-way valve IV is connected with a water outlet of the water-fluorine heat exchanger.
In a specific embodiment, one centralized cold source unit can be connected with a plurality of direct refrigeration units.
In particular embodiments, the direct refrigeration unit may be located indoors, or the evaporator and throttling element a of the direct refrigeration unit may be located indoors, and the refrigerant pump, accumulator, and water-cooled condenser a may be located outdoors.
In particular embodiments, the cooling tower may be a closed cooling tower or an open cooling tower.
In a preferred embodiment, the compressor is an inverter compressor.
The centralized cold source refrigeration cycle system can be divided into two working modes of a water-cooling compressor refrigeration cycle and a natural cooling refrigeration cycle according to the difference of outdoor temperature, and in the working mode of the water-cooling compressor refrigeration cycle, ports A and B of three-way valves I and II are communicated, a port C is closed, ports A and C of three-way valves III and IV are communicated, and a port B is closed; under the working mode of natural cooling refrigeration cycle, a refrigerant circulation loop formed by the water-cooled condenser B, the throttling element B, the water-fluorine heat exchanger and the compressor is closed, ports B and C of the three-way valves I and II are communicated, the port A is closed, ports A and B of the three-way valves III and IV are communicated, and the port C is closed.
Has the advantages that: the utility model provides a centralized cold source refrigeration cycle system, in direct refrigerating unit, the refrigerant evaporates the heat absorption through the evaporimeter, cools off the air in the room, and the refrigerant steam after the evaporation cools off the back through water cooled condenser, business turn over reservoir to circulating flow is indoor under the effect of refrigerant pump, gets into the evaporimeter again after throttling and step-down through throttling element and evaporates the heat absorption, constitutes whole circulation. The indoor direct refrigeration unit cancels a compressor, thereby effectively reducing the energy consumption of the unit. The centralized cold source unit mainly aims at providing low-temperature cold source water, and taking away heat in the direct refrigeration unit through the water-cooled condenser to avoid a heat island effect generated by the air-cooled condenser. And the centralized cold source unit can work by adopting different circulation pipelines according to different outdoor temperatures and is divided into two working modes of water-cooling compressor refrigeration circulation and natural cooling refrigeration circulation, so that an outdoor natural cold source can be fully utilized, the annual energy efficiency ratio of the unit is improved, and the purpose of saving energy is achieved.
Drawings
Fig. 1 is a schematic diagram of a system according to an embodiment of the present invention.
Fig. 2 is a schematic view of a cycle of an operating mode according to an embodiment of the present invention.
Fig. 3 is a schematic view of another cycle of the operation mode according to the embodiment of the present invention.
Fig. 4 is a schematic diagram of a system for connecting a plurality of direct refrigeration units according to an embodiment of the present invention.
In the figure: 11-refrigerant pump, 12-liquid storage device, 13-water-cooled condenser A, 14-evaporator, 15-throttling element A, 20-cooling tower, 21-water-cooled condenser B, 22-throttling element B, 23-water fluorine heat exchanger, 24-variable frequency compressor, 31-three-way valve I, 32-three-way valve II, 33-three-way valve III, 34-three-way valve IV.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the embodiment of the present invention discloses a centralized cooling source refrigeration cycle system, which mainly comprises a direct refrigeration unit and a centralized cooling source unit. The main components of the direct refrigeration unit are a refrigerant pump 11, a liquid storage device 12, a water-cooled condenser A13, an evaporator 14 and a throttling element A15, and the main components of the centralized cold source unit are a cooling tower 20, a water-cooled heat exchanger B21, a throttling element B22, a water-fluorine heat exchanger 23, a high-efficiency variable-frequency compressor 24 and a three-way valve I/II/III/IV (31/32/33/34). A refrigerant pump 11, a liquid storage device 12, a water-cooled condenser A13, an evaporator 14 and a throttling element A15 in the direct refrigeration unit are connected through pipelines to form a direct refrigeration circulating system, and the direct refrigeration unit can be completely positioned indoors; it is also possible to place only the evaporator 14 and the throttle element a15 indoors and other components outdoors, thereby reducing the floor space of the indoor unit.
A water-cooling condenser B21, a throttling element B22, a water-fluorine heat exchanger 23 and a compressor 24 of the centralized cold source unit are connected through pipelines to form a refrigerant circulation loop; a port A (different ports of the three-way valve are distinguished by adopting an A/B/C) of the three-way valve I31 is connected with a cooling water inlet of a water-cooled condenser B21, a port B is connected with a cooling water outlet of the cooling tower 20, a port A of the three-way valve II32 is connected with a cooling water outlet of a water-cooled condenser B21, and a port B is connected with the cooling water inlet of the cooling tower 20; a port A of the three-way valve III33 is connected with a cooling water outlet of the water-cooled condenser A13, a port B is connected with a port C of the three-way valve II32, a port A of the three-way valve IV34 is connected with a cooling water inlet of the water-cooled condenser A13, and a port B is connected with a port C of the three-way valve I31; the port C of the three-way valve III33 is connected with the water return port of the water-fluorine heat exchanger 23, and the port C of the three-way valve IV is connected with the water outlet of the water-fluorine heat exchanger 23.
According to the difference of outdoor temperature, the centralized cold source unit adopts different circulation pipelines to work and is divided into two working modes.
The first working mode is as follows: and (3) a water-cooled compressor refrigeration cycle mode.
In the season of high outdoor temperature, the centralized heat sink set provides low-temperature cold source water through the first working mode, and the whole cycle is as shown in fig. 2. In this mode, ports a and B of three-way valves I and II are connected, port C is closed, ports a and C of three-way valves III and IV are connected, and port B is closed. The cold source water in the centralized cold source unit cools and condenses the refrigerant of the direct refrigeration unit through the water-cooled condenser A13 in the direct refrigeration unit, the water of the cold source water is heated and then enters the water-fluorine heat exchanger 23 of the centralized cold source unit, and the low-temperature cold source water is provided for the direct refrigeration unit through the evaporation and heat absorption of the refrigerant of the water-fluorine heat exchanger 23.
After the heat absorption evaporation of the refrigerant of the water-fluorine heat exchanger 23, the refrigerant enters the high-efficiency frequency converter compressor 24 for compression, then is changed into high-temperature high-pressure refrigerant steam, enters the water-cooling heat exchanger B21 of the centralized cold source unit for cooling and condensation (the cold energy of the refrigerant comes from the cooling tower 20, the cooling tower 20 can be a closed cooling tower or an open cooling tower), and the condensed refrigerant liquid enters the water-fluorine heat exchanger 23 again through the pipeline and the throttling element B22 for heat absorption evaporation, so that the cycle is performed.
And a second working mode: and (4) a natural cooling refrigeration circulation mode.
In the season of low outdoor temperature or wet bulb temperature, the compressor of the centralized heat sink set stops working, and the centralized heat sink set provides low-temperature cold source water through the second working mode, and the cycle is as shown in fig. 3. In this mode, ports B and C of three-way valves I and II are connected, port a is closed, ports a and B of three-way valves III and IV are connected, and port C is closed. The cold source water in the centralized cold source unit is cooled and condensed by the refrigerant of the refrigeration heat exchange unit through the water-cooled condenser A13 in the direct refrigeration unit, and the water of the centralized cold source unit is heated and then directly enters the cooling tower for cooling to generate low-temperature cooling water.
The embodiment of the utility model provides an among the centralized cold source refrigeration cycle system, many direct refrigeration units can be connected to a centralized cold source unit, as shown in figure 4.
The above detailed description describes the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be within the scope of the present invention to perform various equivalent transformations, which all belong to the protection scope of the present invention.
Claims (6)
1. A centralized cold source refrigeration cycle system is characterized by comprising a direct refrigeration unit and a centralized cold source unit; the direct refrigeration unit comprises a refrigerant pump, a liquid storage device, a water-cooled condenser A, an evaporator and a throttling element A which are sequentially connected to form a direct refrigeration circulating system; the centralized cold source unit comprises a cooling tower, a water-cooled condenser B, a throttling element B, a water-fluorine heat exchanger, a compressor and a three-way valve I/II/III/IV; the water-cooled condenser B, the throttling element B, the water-fluorine heat exchanger and the compressor are sequentially connected to form a refrigerant circulation loop; the port A of the three-way valve I is connected with a cooling water inlet of the water-cooled condenser B, the port B is connected with a cooling water outlet of the cooling tower, the port A of the three-way valve II is connected with a cooling water outlet of the water-cooled condenser B, and the port B is connected with a cooling water inlet of the cooling tower; the port A of the three-way valve III is connected with a cooling water outlet of the water-cooled condenser A, the port B is connected with the port C of the three-way valve II, the port A of the three-way valve IV is connected with a cooling water inlet of the water-cooled condenser A, and the port B is connected with the port C of the three-way valve I; and the port C of the three-way valve III is connected with a water return port of the water-fluorine heat exchanger, and the port C of the three-way valve IV is connected with a water outlet of the water-fluorine heat exchanger.
2. The centralized cold source refrigeration cycle system as recited in claim 1, wherein one centralized cold source unit is connected to a plurality of direct refrigeration units.
3. The centralized cold source refrigeration cycle system as claimed in claim 1, wherein the direct refrigeration unit is located indoors, or the evaporator and the throttling element a of the direct refrigeration unit are located indoors, and the refrigerant pump, the accumulator and the water-cooled condenser a are located outdoors.
4. The centralized cold source refrigeration cycle system as claimed in claim 1, wherein the cooling tower is a closed cooling tower or an open cooling tower.
5. The centralized cold source refrigeration cycle system as recited in claim 1, wherein said compressor is an inverter compressor.
6. The refrigeration cycle system of a centralized cold source as claimed in claim 1, wherein the system is divided into two operation modes of a water-cooling compressor refrigeration cycle and a natural cooling refrigeration cycle according to the difference of outdoor temperature, in the operation mode of the water-cooling compressor refrigeration cycle, the ports a and B of the three-way valves I and II are communicated, the port C is closed, the ports a and C of the three-way valves III and IV are communicated, and the port B is closed; under the working mode of natural cooling refrigeration cycle, a refrigerant circulation loop formed by the water-cooled condenser B, the throttling element B, the water-fluorine heat exchanger and the compressor is closed, ports B and C of the three-way valves I and II are communicated, the port A is closed, ports A and B of the three-way valves III and IV are communicated, and the port C is closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920246350.4U CN209877234U (en) | 2019-02-27 | 2019-02-27 | Centralized cold source refrigeration cycle system |
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| CN201920246350.4U CN209877234U (en) | 2019-02-27 | 2019-02-27 | Centralized cold source refrigeration cycle system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959097A (en) * | 2019-02-27 | 2019-07-02 | 南京佳力图机房环境技术股份有限公司 | A kind of centralization cold source cooling cycle system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959097A (en) * | 2019-02-27 | 2019-07-02 | 南京佳力图机房环境技术股份有限公司 | A kind of centralization cold source cooling cycle system |
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