CN111328247A - Phase change cooling system - Google Patents
Phase change cooling system Download PDFInfo
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- CN111328247A CN111328247A CN202010140163.5A CN202010140163A CN111328247A CN 111328247 A CN111328247 A CN 111328247A CN 202010140163 A CN202010140163 A CN 202010140163A CN 111328247 A CN111328247 A CN 111328247A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
- H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
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Abstract
The application discloses phase change cooling system relates to refrigeration technology field. The specific implementation scheme is as follows: the system comprises a compressor, an evaporative condenser, a fluorine pump, a heat regenerator, a first throttle valve and an evaporator, wherein the heat regenerator comprises a first inlet, a second inlet, a first outlet and a second outlet; the evaporator condenser is communicated between the compressor and the fluorine pump, the heat regenerator is communicated between the fluorine pump and the first throttle valve through the first inlet and the first outlet, the heat regenerator is communicated between the evaporator and the compressor through the second inlet and the second outlet, the first throttle valve and the evaporator are communicated between the first outlet and the second inlet, and the first throttle valve is communicated between the first outlet and the evaporator. The temperature of the refrigerant liquid flowing into the evaporator can be reduced by cooling through the heat regenerator, more heat needs to be absorbed to evaporate the refrigerant liquid into gas for the refrigerant liquid with lower temperature, and more heat in the air is absorbed by the evaporator, so that the refrigerating capacity can be increased, and the energy consumption can be reduced in the refrigerating process.
Description
Technical Field
The application relates to the technical field of refrigeration of data centers, in particular to a phase change cooling system.
Background
With the development of internet technology, in recent years, the demand for data centers is increasing, a large amount of heat is generated when the data centers work, and in order to maintain the normal operation of the data centers, the data centers need to be cooled.
However, the existing data center refrigeration system generally adopts a traditional chilled water system, the traditional chilled water system consists of a cooling tower, a cooling water pump, a water chilling unit, a chilled water pump and a tail end air conditioner, chilled water circulates through the water chilling unit to refrigerate and produce chilled water, then the chilled water is provided to a room precision air conditioner through the power provided by the water pump, and return air is cooled to refrigerate for a machine room; the cooling water system sends the heat generated by the water chilling unit to the cooling tower through the water pump, and cools the cooling water through outdoor air to supply water and convey the heat to the atmosphere. However, such a refrigeration system consumes much energy and is poor in energy saving performance.
Disclosure of Invention
The application provides a phase change cooling system, a phase change cooling device and electronic equipment to solve the problem that energy conservation is poor in the existing refrigeration scheme.
In a first aspect, an embodiment of the present application provides a phase change cooling system, including: the system comprises a compressor, an evaporative condenser, a fluorine pump, a heat regenerator, a first throttle valve and an evaporator, wherein the heat regenerator comprises a first inlet, a second inlet, a first outlet and a second outlet;
wherein the evaporative condenser is in communication between the compressor and the fluorine pump, the regenerator is in communication between the fluorine pump and the first throttle valve through the first inlet and the first outlet, the regenerator is in communication between the evaporator and the compressor through the second inlet and the second outlet, the first throttle valve is in communication with the evaporator between the first outlet and the second inlet, and the first throttle valve is in communication between the first outlet and the evaporator.
In the phase change cooling system of this application embodiment, the refrigerant liquid that the first choke valve of evaporimeter heat absorption evaporation flows forms refrigerant gas, realize refrigerating, because phase change cooling system is equipped with the regenerator, the liquid that the evaporative condenser condensation obtained cools off through the regenerator, through regenerator liquid temperature reduction promptly, then flow into the evaporimeter for refrigerant liquid through first choke valve throttle again, it can make the refrigerant liquid temperature who flows into the evaporimeter to lower temperature refrigerant liquid to lower temperature, need absorb more heats and evaporate it into gas, more heats in the air are absorbed by the evaporimeter promptly, thereby can increase the refrigerating capacity, so, in the refrigerating process, can reduce the energy consumption.
Optionally, the compressor is an oil-free compressor.
An oil-free compressor refers to a compressor that does not use lubricating oil in the compressor cylinder, since in operation no lubricating oil is in contact with the compressed air source, and therefore the discharge gas is never oily. The problem that the oil return problem of the compressor affects refrigeration of a refrigeration system can be avoided by adopting the oil-free compressor, and the refrigeration effect is improved.
Optionally, the first throttle valve is a first electronic expansion valve.
Namely, in the process of refrigeration, the adjustment reaction of the electronic expansion valve is fast, and the refrigeration efficiency can be improved.
Optionally, the evaporator includes a first loop pipe, a second loop pipe and a heat exchanger, the heat exchanger includes a first port and a second port which are communicated, the first loop pipe is communicated with the first throttle valve, the second loop pipe is communicated with the second inlet, the first port of the heat exchanger is communicated with the first loop pipe, and the second port of the heat exchanger is communicated with the second loop pipe.
The refrigerant liquid obtained by throttling of the first throttle valve flows into a first loop pipe of the evaporator, the refrigerant liquid flows into the heat exchanger through a first port, refrigerant gas is obtained through heat absorption and evaporation, the refrigerant gas flows into a second loop pipe through a second port, and the refrigerant gas flows into a second inlet of the heat regenerator through the second loop pipe and flows into the heat regenerator through the second inlet. The evaporator leads liquid through the first ring pipe and leads the gas through the second ring pipe, so that the whole refrigeration process is effectively carried out.
Optionally, the heat exchanger further includes a heat exchange back plate, a first joint, a second joint, a temperature sensor, and a second throttle valve, the heat exchange back plate includes the first port and the second port, the first joint is communicated with the first port through the second throttle valve, the second joint is communicated with the second port, a temperature sensor is disposed on a communication pipe between the second joint and the second port, the temperature sensor is connected with the second throttle valve, the first joint is communicated with the first loop pipe, and the second joint is communicated with the second loop pipe.
The heat exchanger of the evaporator adopts a back plate mode to increase the heat exchange area, realize nearby cooling and improve the whole heat exchange effect, thereby improving the refrigeration effect of the whole refrigeration system. And temperature sensor 7 is connected with the second choke valve, and the second choke valve carries out the aperture according to the temperature of temperature sensor 7 collection and adjusts, makes heat exchanger working process adapt to current temperature more, improves the heat exchanger heat absorption evaporation effect.
Optionally, the heat exchanger further comprises a first valve and a second valve, the first valve is connected between the first port and the first joint, and the second valve is connected between the second throttle valve and the second joint.
The on-off between the first port and the first joint can be controlled by the first valve, and the on-off between the second port and the second joint can be controlled by the second valve, so that the flow control of the refrigerant liquid between the first port and the first joint in the heat exchanger is facilitated, and the flow control of the refrigerant gas between the second port and the second joint in the heat exchanger is facilitated.
Optionally, the second throttle valve is a second electronic expansion valve.
Namely, in the process of refrigeration, the adjustment reaction of the electronic expansion valve is fast, and the refrigeration efficiency can be improved.
Optionally, the number of the heat exchangers is at least two, the first port of each heat exchanger is communicated with the first loop pipe, and the second port of each heat exchanger is communicated with the second loop pipe.
That is, the heat exchangers in the evaporator are multiple, and evaporation efficiency can be improved by evaporating through the multiple heat exchangers, so that refrigeration efficiency is improved.
Optionally, the first loop pipe includes N third valves and N sections of pipelines, the N sections of pipelines are communicated through the N third valves, and N is a positive integer.
In this embodiment, the pipeline between every two adjacent third valves can be ensured to be connected with at least one heat exchanger, so as to improve the uniformity of the evaporation of the refrigerant liquid in the first loop and make the evaporation more stable.
Optionally, the second loop pipe includes M fourth valves and M sections of pipelines, where the M sections of pipelines are communicated through the M fourth valves, and M is a positive integer.
In this embodiment, the pipeline between every two adjacent fourth valves can be ensured to be connected with at least one heat exchanger, so that the refrigerant gas obtained by the evaporation of the heat exchanger is more uniform, and the refrigeration effect is improved.
Drawings
The drawings are included to provide a better understanding of the present solution and are not intended to limit the present application. Wherein:
FIG. 1 is a schematic view of a phase change cooling system according to one embodiment provided herein;
FIG. 2 is a schematic diagram of an evaporator in a phase change refrigeration system according to an embodiment provided herein;
fig. 3 is a schematic diagram of a heat exchanger in an evaporator in a phase change refrigeration system according to an embodiment provided herein.
Detailed Description
The following description of the exemplary embodiments of the present application, taken in conjunction with the accompanying drawings, includes various details of the embodiments of the application for the understanding of the same, which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
As shown in fig. 1, according to an embodiment of the present application, there is provided a phase change cooling system for cooling a data center, the system including: the heat regenerator 140 includes a first inlet r1, a second inlet r2, a first outlet t1, and a second outlet t 2.
The evaporative condenser 120 is connected between the compressor 110 and the fluorine pump 130, the regenerator 140 is connected between the fluorine pump 130 and the first throttle valve 150 through the first inlet r1 and the first outlet t1, the regenerator 140 is connected between the evaporator 160 and the compressor 110 through the second inlet r2 and the second outlet t2, the first throttle valve 150 and the evaporator 160 are connected between the first outlet t1 and the second inlet r2, and the first throttle valve 150 is connected between the first outlet t1 and the evaporator 160.
The refrigerant gas of the evaporator 160 is heated (which can be understood as heating) by the heat regenerator 140 and then flows into the compressor 110, the heated refrigerant gas is heated and boosted by the compressor 110 and then flows into the evaporative condenser 120, the heated and boosted refrigerant gas is condensed into liquid in the evaporative condenser 120 and flows into the heat regenerator 140, the evaporative condenser 120 needs to release heat in the condensation process, and the released heat can be discharged, so that outdoor side air circulation is realized. The liquid obtained by condensing the evaporated and condensed gas provides power through the fluorine pump 130 and flows into the heat regenerator 140, the liquid is throttled into refrigerant liquid through the first throttle valve 150 after being cooled (which can be understood as cooling) by the heat regenerator 140, namely, the liquid is cooled by the heat regenerator 140, and then is reduced in temperature and pressure under the action of the first throttle valve 150 to obtain the refrigerant liquid, the refrigerant liquid flows into the evaporator 160, and is evaporated into refrigerant gas after absorbing heat by the evaporator 160, the evaporator 160 needs to absorb heat for evaporation, namely, absorbs heat from indoor air, thereby achieving the purpose of refrigeration, and the evaporator 160 realizes indoor side air circulation. The refrigerant gas from the evaporator 160 is then fed into the regenerator 140 for the next cycle, thereby achieving the purpose of cycle refrigeration, and the fluorine pump 130 is used to power the cycle refrigeration, for example, to power the liquid from the condenser, which is fed to the regenerator 140.
In the phase change cooling system of the embodiment of the present application, the evaporator 160 absorbs heat to evaporate the refrigerant liquid flowing out of the first throttle valve 150 to form refrigerant gas, thereby achieving refrigeration, because the phase change cooling system is provided with the heat regenerator 140, the liquid obtained by condensation of the evaporative condenser 120 is cooled by the heat regenerator 140, namely, the temperature of the liquid passing through the heat regenerator 140 is reduced, then the refrigerant liquid flows into the evaporator 160 by throttling through the first throttle valve 150, the temperature of the refrigerant liquid flowing into the evaporator 160 can be reduced by cooling through the heat regenerator 140, for the refrigerant liquid at lower temperature, more heat needs to be absorbed to evaporate the refrigerant liquid into gas, namely, more heat in the air is absorbed by the evaporator 160, thereby increasing the refrigerating capacity, and thus, in the refrigeration process, the energy consumption can be reduced. Meanwhile, the refrigerant gas of the evaporator 160 is heated by the heat regenerator 140 and then flows into the compressor 110, so that the temperature of the refrigerant gas flowing into the compressor 110 can be secured, the compressor 110 can suck air and overheat, and liquid slugging can be prevented.
Optionally, the compressor 110 is an oil-free compressor. An oil-free compressor refers to a compressor 110 that does not use lubricating oil in the cylinders of the compressor 110, and since no lubricating oil is in contact with the compressed air source during operation, the discharge gas is never oily. The problem that the refrigeration of the refrigeration system is influenced by the oil return problem of the compressor 110 can be avoided by adopting the oil-free compressor, and the refrigeration effect is improved.
Optionally, the first throttle 150 is a first electronic expansion valve. The electronic expansion valve controls the voltage or current applied to the expansion valve by using the electric signal generated by the regulated parameter, thereby achieving the purpose of regulating the liquid supply amount. The refrigerating system has wide refrigerating liquid supply amount regulating range and fast regulating reaction, and the traditional throttling device (such as a thermostatic expansion valve) is difficult to be well qualified, while the electronic expansion valve can well meet the requirement, namely, in the refrigerating process, the regulating reaction of the electronic expansion valve is fast, and the refrigerating efficiency can be improved.
Optionally, as shown in fig. 2, the evaporator 160 includes a first loop 161, a second loop 162 and a heat exchanger 163, the heat exchanger 163 includes a first port 1631 and a second port 1632 in communication, the first loop 161 is in communication with the first throttling valve 150, the second loop 162 is in communication with the second inlet r2, the first port 1631 of the heat exchanger 163 is in communication with the first loop 161, and the second port 1632 of the heat exchanger 163 is in communication with the second loop 162.
It is understood that the first loop pipe 161 is communicated with the second loop pipe 162 through the heat exchanger 163, the refrigerant liquid throttled by the first throttle valve 150 flows into the first loop pipe 161 of the evaporator 160, the refrigerant liquid flows into the heat exchanger 163 through the first port 1631, and undergoes endothermic evaporation to obtain refrigerant gas, the refrigerant gas flows into the second loop pipe 162 through the second port 1632, and the refrigerant gas flows into the second inlet r2 of the heat regenerator 140 through the second loop pipe 162 and flows into the heat regenerator 140 through the second inlet r 2. The evaporator 160 provides a liquid flow path through a first loop 161 and a gas flow path through a second loop 162 to allow the entire refrigeration process to be efficiently performed.
Optionally, as shown in fig. 2 and 3, the heat exchanger 163 further includes a heat exchange back plate 1633, a first joint 1634, a second joint 1635, a temperature sensor 1637 and a second throttle 1636, the heat exchange back plate 1633 includes a first port 1631 and a second port 1632, the first joint 1634 is communicated with the first port 1631 through the second throttle 1636, the second joint 1635 is communicated with the second port 1632, a temperature sensor 1637 is disposed on a communication pipeline between the second joint 1635 and the second port 1632, the temperature sensor 1637 is connected to the second throttle 1636, the first joint 1634 is communicated with the first loop pipe 161, and the second joint 1635 is communicated with the second loop pipe 162.
Refrigerant liquid flows into heat exchange back plate 1633 through first joint 1634 and first joint 1631, and undergoes endothermic evaporation to obtain refrigerant gas, which flows into second loop pipe 162 through second joint 1632 and second joint 1635, and flows into second inlet r2 of heat regenerator 140 through second loop pipe 162 and flows into heat regenerator 140 through second inlet r 2.
The heat exchanger 163 of the evaporator 160 adopts a back plate manner to increase the heat exchange area, realize the nearby cooling, improve the overall heat exchange effect, and thus improve the refrigeration effect of the whole refrigeration system. And the temperature sensor 1637 is connected with the second throttle valve 1636, and the second throttle valve 1636 adjusts the opening according to the temperature collected by the temperature sensor 1637, so that the working process of the heat exchanger 163 is more adaptive to the current temperature, and the heat absorption and evaporation effects of the heat exchanger 163 are improved.
As an example, a first connector 1634 communicates with the first port 1631 via a first connection hose 1638, and a second connector 1635 communicates with the second port 1632 via a second connection hose 1639.
Optionally, the heat exchanger 163 further comprises a first valve f1 and a second valve 2, the first valve f1 is connected between the first port 1631 and the first connector 1634, and the second valve 2 is connected between the second throttle 1636 and the second connector 1635.
A first valve f1 may be disposed in the first connecting hose 1638 between the first port 1631 and the first joint 1634, the on/off between the first port 1631 and the first joint 1634 may be controlled by the first valve f1, a second valve 2 may be disposed in the second connecting hose 1639 between the second port 1632 and the second joint 1635, and the on/off between the second port 1632 and the second joint 1635 may be controlled by the second valve 2, so as to facilitate the flow control of the refrigerant liquid between the first port 1631 and the first joint 1634 in the heat exchanger 163, and to facilitate the flow control of the refrigerant gas between the second port 1632 and the second joint 1635 in the heat exchanger 163. As an example, the first valve f1 may be a first shut-off valve, and the second valve 2 may be a second shut-off valve.
Optionally, the second throttle 1636 is a second electronic expansion valve. The electronic expansion valve controls the voltage or current applied to the expansion valve by using the electric signal generated by the regulated parameter, thereby achieving the purpose of regulating the liquid supply amount. The refrigerating system has wide refrigerating liquid supply amount regulating range and fast regulating reaction, and the traditional throttling device (such as a thermostatic expansion valve) is difficult to be well qualified, while the electronic expansion valve can well meet the requirement, namely, in the refrigerating process, the regulating reaction of the electronic expansion valve is fast, and the refrigerating efficiency can be improved.
Optionally, with continued reference to FIG. 2, there are at least two heat exchangers 163, with the first port 1631 of each heat exchanger 163 in communication with the first loop 161 and the second port 1632 of each heat exchanger 163 in communication with the second loop 162.
That is, there are a plurality of heat exchangers 163 in the evaporator 160, and evaporation efficiency can be improved by performing evaporation using the plurality of heat exchangers 163, thereby improving cooling efficiency.
Optionally, with continued reference to fig. 2, the first loop 161 includes N third valves and N sections of piping that communicate through the N third valves. N is a positive integer, and the piping between adjacent third valves of first loop 161 connects to at least one heat exchanger 163.
In this embodiment, the pipeline between every two adjacent third valves is connected to at least one heat exchanger 163, so as to improve the uniformity of the evaporation of the refrigerant liquid in the first loop pipe 161 and stabilize the evaporation. As an example, the third valve may be a third shutoff valve, and may be a third shutoff butterfly valve, and the fourth valve may be a fourth shutoff valve, and may be a fourth shutoff butterfly valve.
Optionally, with continued reference to fig. 2, the second loop 162 includes M fourth valves and M sections of piping, where the M sections of piping communicate through the M fourth valves. M is a positive integer, and a line between two adjacent fourth valves of the second loop pipe 162 connects at least one heat exchanger 163.
In this embodiment, the pipeline between every two adjacent fourth valves is connected to at least one heat exchanger 163, so that the refrigerant gas obtained by evaporation of the heat exchanger 163 is more uniform, and the refrigeration effect is improved.
Optionally, with continuing reference to fig. 1, the phase-change refrigeration system may further include a first fan disposed on the evaporative condenser 120 and a second fan disposed on the evaporator 160, where the second fan transfers heat absorbed from the indoor air to the evaporator 160 for evaporation, so as to implement indoor side air circulation, and thus, the evaporator 160 may accelerate absorption of heat of the air, so that the cooling effect is better, that is, the evaporator 160 may accelerate absorption of heat of the indoor air through the second fan, thereby accelerating indoor refrigeration. The first fan discharges heat released by the refrigerant liquid condensed from the refrigerant gas by the evaporator-condenser 120 to the outside of the room, thereby realizing outdoor side air circulation and accelerating cooling of the evaporator-condenser 120.
The above-described embodiments should not be construed as limiting the scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A phase change cooling system, comprising: the system comprises a compressor, an evaporative condenser, a fluorine pump, a heat regenerator, a first throttle valve and an evaporator, wherein the heat regenerator comprises a first inlet, a second inlet, a first outlet and a second outlet;
wherein the evaporative condenser is in communication between the compressor and the fluorine pump, the regenerator is in communication between the fluorine pump and the first throttle valve through the first inlet and the first outlet, the regenerator is in communication between the evaporator and the compressor through the second inlet and the second outlet, the first throttle valve is in communication with the evaporator between the first outlet and the second inlet, and the first throttle valve is in communication between the first outlet and the evaporator.
2. The system of claim 1, wherein the compressor is an oil-free compressor.
3. The system of claim 1, wherein the first throttling valve is a first electronic expansion valve.
4. The system of claim 1, wherein the evaporator comprises a first loop, a second loop, and a heat exchanger, the heat exchanger comprising a first port and a second port in communication, the first loop in communication with the first throttling valve, the second loop in communication with the second inlet, the first port of the heat exchanger in communication with the first loop, the second port of the heat exchanger in communication with the second loop.
5. The system of claim 4, wherein the heat exchanger further comprises a heat exchange back plate, a first joint, a second joint, a temperature sensor and a second throttling valve, the heat exchange back plate comprises the first port and the second port, the first joint is communicated with the first port through the second throttling valve, the second joint is communicated with the second port, a temperature sensor is arranged on a communication pipeline between the second joint and the second port, the temperature sensor is connected with the second throttling valve, the first joint is communicated with the first loop pipe, and the second joint is communicated with the second loop pipe.
6. The system of claim 5, wherein the heat exchanger further comprises a first valve and a second valve, the first valve connected between the first port and the first junction, the second valve connected between the second throttle valve and the second junction.
7. The system of claim 5, wherein the second throttling valve is a second electronic expansion valve.
8. The system of claim 4, wherein the number of heat exchangers is at least two, a first port of each heat exchanger being in communication with the first loop pipe, and a second port of each heat exchanger being in communication with the second loop pipe.
9. The system of claim 4, wherein the first loop comprises N third valves and N sections of piping, the N sections of piping being in communication through the N third valves, N being a positive integer.
10. The system of claim 4, wherein the second loop comprises M fourth valves and M sections of piping, wherein the M sections of piping are connected by the M fourth valves, and M is a positive integer.
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| CN202010140163.5A CN111328247B (en) | 2020-03-03 | 2020-03-03 | Phase change cooling system |
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| CN202010140163.5A CN111328247B (en) | 2020-03-03 | 2020-03-03 | Phase change cooling system |
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| CN105509373A (en) * | 2015-12-24 | 2016-04-20 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner with same |
| CN109831891A (en) * | 2017-11-23 | 2019-05-31 | 维谛技术有限公司 | Cooling system, cooling control method and the device of liquid cooled server |
| CN108055813A (en) * | 2017-12-28 | 2018-05-18 | 北京百度网讯科技有限公司 | The refrigeration system and refrigerating method of data center |
| CN108225063A (en) * | 2018-02-24 | 2018-06-29 | 中国科学院理化技术研究所 | A kind of three media heat exchangers and its manufacturing method, a kind of three media for heat exchange equipment |
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