CN216752525U - Cold station unit and integrated cold station system - Google Patents
Cold station unit and integrated cold station system Download PDFInfo
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- CN216752525U CN216752525U CN202122587431.0U CN202122587431U CN216752525U CN 216752525 U CN216752525 U CN 216752525U CN 202122587431 U CN202122587431 U CN 202122587431U CN 216752525 U CN216752525 U CN 216752525U
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Abstract
The application discloses a cold station unit and an integrated cold station system, wherein the cold station unit comprises a circulating refrigerant pipeline for circulating a refrigerant medium, and a compressor, a condenser, a liquid pump, a throttling device and a heat exchanger which are connected with the circulating refrigerant pipeline, wherein the compressor is connected with a first bypass pipeline in parallel, the liquid pump is connected with a second bypass pipeline in parallel, the compressor and the first bypass pipeline are alternatively switched on and off, and the liquid pump and the second bypass pipeline are alternatively switched on and off; the heat exchanger is communicated with a circulating freezing water pipeline of the tail end unit, and the circulating freezing water pipeline and a circulating refrigerant pipeline exchange heat in the heat exchanger. The utility model can select the compressor and/or the liquid pump to refrigerate according to the outdoor temperature, and can only drive the heat pipe to refrigerate by using the liquid pump alone without operating the compressor or use the liquid pump to assist in refrigeration when the compressor refrigerates under the condition of lower outdoor temperature by applying the liquid pump heat pipe technology, thereby achieving the purposes of reducing the load of the compressor and reducing the energy consumption.
Description
Technical Field
The utility model relates to the technical field of refrigeration equipment, in particular to a cold station unit and an integrated cold station system.
Background
With the promotion and promotion of a series of informatization projects such as ' internet + ' big data application ', the scale and the number of data centers are rapidly developed. When the data center works, a large amount of electric energy is consumed and a large amount of heat is generated, so that the ambient temperature of a machine room is increased, and a refrigeration system needs to be configured for refrigeration to ensure the normal operation of the data center. PUE (Power Usage efficiency, abbreviated) is an index for evaluating energy efficiency of a data center, and is a ratio of all energy consumed by the data center to energy used by IT loads, and cooling of the data center accounts for about 40% of total Power consumption, so that the PUE value can be effectively reduced by reducing the Power consumption of a refrigeration system. How to effectively reduce the energy consumption of the refrigeration system becomes a problem to be urgently solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a cold station unit to effectively reduce the energy consumption of the refrigeration system. It is another object of the present invention to provide an integrated cold station system to effectively reduce energy consumption.
In order to achieve the purpose, the utility model provides the following technical scheme:
a cold station unit is applied to an integrated cold station system comprising a tail end unit and comprises a circulating refrigerant pipeline, a compressor, a condenser, a liquid pump, a throttling device and a heat exchanger, wherein the compressor, the condenser, the liquid pump, the throttling device and the heat exchanger are connected with the circulating refrigerant pipeline; the heat exchanger is communicated with a circulating chilled water pipeline of the tail end unit, and the circulating chilled water pipeline and the circulating refrigerant pipeline exchange heat in the heat exchanger.
Preferably, the first bypass pipeline is provided with a first check valve, the circulating refrigerant pipeline between the inlet and the outlet of the first bypass pipeline is provided with a second check valve connected in parallel with the first check valve, and the first check valve and the second check valve have the same conduction direction and are both along the direction from the inlet to the outlet of the compressor; and/or
The second bypass pipeline is provided with a third one-way valve, the circulating refrigerant pipeline between the inlet and the outlet of the second bypass pipeline is provided with a fourth one-way valve connected with the third one-way valve in parallel, and the conduction directions of the third one-way valve and the fourth one-way valve are the same and are all along the direction from the inlet to the outlet of the liquid pump.
Preferably, the compressor, the condenser, the liquid pump, the throttling device and the heat exchanger are sequentially connected in series, and a refrigerant outlet of the heat exchanger is communicated with an inlet of the compressor.
Preferably, the cold station unit further includes a reservoir disposed in the circulating refrigerant pipeline.
Preferably, the restriction device comprises an expansion valve.
The present invention also provides an integrated cold station system comprising:
the cold station unit of any one of the above;
the tail end unit comprises a circulating chilled water pipeline, a chilled water pump and at least one evaporator, wherein the chilled water pump and the at least one evaporator are arranged in the circulating chilled water pipeline, and chilled water circulates in the circulating chilled water pipeline.
Preferably, the integrated cold station system has at least one of the following modes:
a compressor cooling mode in which the compressor and the second bypass line are connected and the first bypass line and the liquid pump are disconnected;
a liquid pump heat pipe refrigeration mode, wherein in the liquid pump heat pipe refrigeration mode, the first bypass pipeline is communicated with the liquid pump, and the compressor is disconnected with the second bypass pipeline;
and a hybrid refrigeration mode in which the compressor and the liquid pump are on and the first bypass line and the second bypass line are off.
Preferably, the end unit further comprises a water valve, the end unit is provided with one evaporator or a plurality of evaporators connected in parallel, the number of the water valves is larger than or equal to that of the evaporators, and each evaporator is connected with at least one water valve in series.
The working principle of the utility model is as follows:
when the integrated cold station system works, the cold station unit refrigerates, the refrigerated cold medium exchanges heat with the circulating chilled water pipeline in the heat exchanger through the circulating refrigerant pipeline, so that chilled water in the circulating chilled water pipeline is cooled, and finally, cold energy is input into the indoor environment through the evaporator of the tail end unit, so that the refrigerating work of the integrated cold station system is completed.
The cold station unit can select the compressor and/or the liquid pump to refrigerate according to the outdoor temperature, and the liquid pump heat pipe technology is applied, so that the compressor does not need to be operated under the condition of low outdoor temperature, the liquid pump is only used for driving the heat pipe to refrigerate alone, or the liquid pump is used for driving the heat pipe to refrigerate in an auxiliary way while the compressor is used, and therefore the purposes of reducing the load of the compressor and reducing the energy consumption are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an integrated cold station system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an integrated cold station system operating in a compressor cooling mode according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating operation of an integrated cold station system in a hybrid cooling mode according to an embodiment of the present invention;
fig. 4 is a schematic working diagram of an integrated cold station system in a liquid pump heat pipe cooling mode according to an embodiment of the present invention.
Wherein, A is a cold station unit, B is a tail end unit, 1 is a compressor, 2 is a second one-way valve, 3 is a condenser, 4 is a liquid storage device, 5 is a liquid pump, 6 is a fourth one-way valve, 7 is a throttling device, 8 is a heat exchanger, 9 is a circulating refrigerant pipeline, 10 is a first bypass pipeline, 11 is a first one-way valve, 12 is a second bypass pipeline, 13 is a third one-way valve, 14 is a circulating chilled water pipeline, 15 is a chilled water pump, 16 is a water valve, and 17 is an evaporator.
Detailed Description
The core of the utility model is to provide a cold station unit which can effectively reduce the energy consumption of a refrigeration system. The utility model also provides an integrated cold station system which can effectively reduce energy consumption.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, an embodiment of the present invention provides a cold station unit, which is applied to an integrated cold station system including a terminal unit B, where the cold station unit a includes a circulating refrigerant pipeline 9, and a compressor 1, a condenser 3, a liquid pump 5, a throttling device 7 and a heat exchanger 8 connected to the circulating refrigerant pipeline 9, the circulating refrigerant pipeline 9 is used for circulating a refrigerant medium, the compressor 1 is connected in parallel to a first bypass pipeline 10, the liquid pump 5 is connected in parallel to a second bypass pipeline 12, the compressor 1 and the first bypass pipeline 10 are alternatively connected, and the liquid pump 5 and the second bypass pipeline 12 are alternatively connected; the heat exchanger 8 is communicated with a circulating freezing water pipeline 14 of the tail end unit B, the circulating freezing water pipeline 14 is used for circulating freezing water, and the circulating freezing water pipeline 14 and the circulating refrigerant pipeline 9 exchange heat in the heat exchanger 8.
The working principle of the utility model is as follows:
when the integrated cold station system works, the cold station unit A refrigerates, the refrigerated cold medium exchanges heat with the circulating freezing water pipeline 14 in the heat exchanger 8 through the circulating refrigerant pipeline 9, so that the freezing water in the circulating freezing water pipeline 14 is cooled, and finally, the cold quantity is sent into the indoor environment through the evaporator 17 of the tail end unit B, so that the refrigerating work of the integrated cold station system is completed. This cold station unit A can select compressor 1 and/or liquid pump 5 to refrigerate according to outdoor temperature, uses liquid pump heat pipe technique, can be under the lower condition of outdoor temperature, need not operate compressor 1, only need use liquid pump 5 drive heat pipe alone to refrigerate, perhaps uses liquid pump 5 drive heat pipe to assist refrigeration when using compressor 1 to reach the purpose that reduces compressor 1 load, reduction energy consumption.
Further, in this embodiment, the first bypass pipeline 10 is provided with a first check valve 11, the circulating refrigerant pipeline 9 from the inlet to the outlet of the first bypass pipeline 10 is provided with a second check valve 2 connected in parallel with the first check valve 11, that is, the circulating refrigerant pipeline 9 from the inlet of the first bypass pipeline 10 to the inlet of the compressor 1 is provided with the second check valve 2 or the circulating refrigerant pipeline 9 from the outlet of the compressor 1 to the outlet of the first bypass pipeline 10 is provided with the second check valve 2, the conduction directions of the first check valve 11 and the second check valve 2 are the same and both follow the direction from the inlet to the outlet of the compressor 1. Through set up the check valve respectively on parallelly connected pipeline, can the make-and-break of the circulation refrigerant pipeline 9 and the first bypass pipeline 10 at compressor 1 place of independent control, and switch on in the circulation refrigerant pipeline 9 and the first bypass pipeline 10 at compressor 1 place, under the condition of another disconnection, the pipeline that switches on avoids cold medium matter backward flow because of the one-way effect that switches on of check valve.
Preferably, a second non-return valve 2 is provided on the outlet side of the compressor 1, to avoid the backflow of refrigerant medium into the compressor 1. Of course, the second check valve 2 may also be provided on the inlet side of the compressor 1, as desired.
Of course, the first bypass pipeline 10 and the circulating refrigerant pipeline 9 where the compressor 1 is located may be switched on or off by other valves, such as a stop valve and an adjusting valve. As long as the on-off of each pipeline can be controlled.
Similarly, in the present embodiment, the second bypass line 12 is provided with the third check valve 13, the circulating refrigerant line 9 from the inlet to the outlet of the second bypass line 12 is provided with the fourth check valve 6 connected in parallel with the third check valve 13, that is, the circulating refrigerant line 9 from the inlet of the second bypass line 12 to the inlet of the liquid pump 5 is provided with the fourth check valve 6 or the circulating refrigerant line 9 from the outlet of the liquid pump 5 to the outlet of the second bypass line 12 is provided with the fourth check valve 6, and the conduction directions of the third check valve 13 and the fourth check valve 6 are the same and both along the inlet to outlet direction of the liquid pump 5. The one-way valves are respectively arranged on the pipelines connected in parallel, so that the on-off of the circulating refrigerant pipeline 9 where the liquid pump 5 is located and the on-off of the second bypass pipeline 12 can be independently controlled, one of the circulating refrigerant pipeline 9 where the liquid pump 5 is located and the second bypass pipeline 12 is connected, and under the condition that the other one of the circulating refrigerant pipeline 9 and the second bypass pipeline 12 is disconnected, the connected pipeline avoids the backflow of refrigerant due to the one-way connection effect of the one-way valves.
Preferably, the fourth non return valve 6 is arranged on the outlet side of the liquid pump 5 to avoid backflow of refrigerant medium into the liquid pump 5. Of course, the fourth check valve 6 may also be provided on the inlet side of the liquid pump 5, if desired.
Of course, the second bypass line 12 and the circulating refrigerant line 9 where the liquid pump 5 is located may be opened or closed by other valves, such as a stop valve and a regulating valve. As long as the on-off of each pipeline can be controlled.
Further, in the present embodiment, in the circulating refrigerant pipeline 9, the compressor 1, the condenser 3, the liquid pump 5, the throttling device 7 and the heat exchanger 8 may be connected in series in sequence, and a refrigerant outlet of the heat exchanger 8 is communicated with an inlet of the compressor 1. During working, in a compressor refrigeration mode, the refrigerant medium returns to the compressor 1 after sequentially passing through the compressor 1, the condenser 3, the throttling device 7 and the heat exchanger 8, and the refrigeration cycle of the compressor 1 is completed; in the mixed refrigeration mode, the refrigerant medium sequentially passes through the compressor 1, the condenser 3, the liquid pump 5, the throttling device 7 and the heat exchanger 8 and then returns to the compressor 1, and the heat pipe refrigeration cycle of the compressor 1 and the liquid pump 5 is completed; under the liquid pump heat pipe refrigeration mode, the refrigerant medium is driven by the liquid pump 5 to sequentially pass through the condenser 3, the liquid pump 5, the throttling device 7 and the heat exchanger 8 and then return to the condenser 3, and the heat pipe refrigeration cycle of the liquid pump 5 is completed.
Furthermore, in this embodiment, the cold station unit a may further include an accumulator 4 disposed in the circulating refrigerant pipeline 9. Preferably, an accumulator 4 may be provided between the condenser 3 and the liquid pump 5, and the accumulator 4 supplements and collects the refrigerant medium in the circulating refrigerant pipeline 9 to keep the continuity and pressure of the refrigerant medium in the system stable. Of course, the accumulator 4 may be disposed at other positions in the circulating refrigerant pipeline 9, or the accumulator 4 may not be disposed.
Preferably, in this embodiment, the throttling device 7 is an expansion valve, and has a function of widely adjusting the flow rate. The number of the expansion valves may be one or more, a plurality of the expansion valves may be arranged in parallel, and the plurality of the expansion valves may be in the same adjustment range or may be different. Of course, the throttle device 7 may be other throttle valves than an expansion valve.
In the present embodiment, the compressor 1 may be an inverter rotor compressor, an inverter scroll compressor, a magnetic levitation compressor, an air levitation compressor, an inverter centrifugal compressor, or an inverter screw compressor.
The utility model also provides an integrated cold station system, which comprises the cold station unit a as described above and further comprises a terminal unit B, wherein the terminal unit B comprises a circulating chilled water pipeline 14, a chilled water pump 15 arranged in the circulating chilled water pipeline 14 and at least one evaporator 17, and chilled water circulates in the circulating chilled water pipeline 14.
As shown in fig. 2, in the present embodiment, the integrated cold station system has a compressor cooling mode in which the compressor 1 and the second bypass line 12 are both turned on, and the first bypass line 10 and the liquid pump 5 are both turned off. In this way, the refrigerant medium is compressed only by the compressor 1 and is not cooled by the liquid pump 5. The compressor refrigeration mode is suitable for the situation that the outdoor temperature is high, at the moment, the compression efficiency of the compressor 1 is high, and the refrigeration effect can be realized through the compressor 1.
In this embodiment, the integrated cold station system has a liquid pump heat pipe cooling mode, in which the first bypass line 10 and the liquid pump 5 are both turned on, and the compressor 1 and the second bypass line 12 are both turned off. In this way, the refrigerant medium is only cooled by the heat pipes of the liquid pump 5 and is not compressed by the compressor 1. The liquid pump heat pipe refrigeration mode is suitable for the condition that the outdoor temperature is very low, the compressor 1 can not effectively finish compression refrigeration at the moment, the efficiency is low, the outdoor temperature at the moment meets the phase change condition of the refrigerant medium in the heat pipe, the refrigerant medium finishes refrigeration in the heat pipe under the driving of the liquid pump 5 through the phase change of the refrigerant medium in the heat pipe, the heat pipe is driven by the liquid pump to replace the compressor 1 to work, the power consumption can be greatly saved, and the energy consumption is saved.
As shown in fig. 4, in the present embodiment, the integrated cold station system has a mixed cooling mode in which the compressor 1 and the liquid pump 5 are both turned on, and the first bypass line 10 and the second bypass line 12 are both turned off. In this way, the refrigerant medium is compressed and cooled by the compressor 1, and is also cooled by the heat pipe of the liquid pump 5. The mixed refrigeration mode is suitable for the condition of low outdoor temperature, and is between the outdoor temperature of the compressor refrigeration mode and the liquid pump heat pipe refrigeration mode, the liquid pump 5 needs to be operated to assist the system circulation, the supercooling degree is improved, the circulation power is enhanced, and the oil return or the motor cooling is enhanced, so that the refrigeration effect is improved, and the energy consumption is reduced.
As shown in fig. 1, in the present embodiment, the end unit B has one evaporator 17 or a plurality of evaporators 17 connected in parallel, and further includes water valves 16, wherein the number of the water valves 16 is greater than or equal to the number of the evaporators 17, and each evaporator 17 is connected in series with at least one water valve 16. In this way, one cold station unit a can supply cold to only one evaporator 17, or to a plurality of evaporators 17 connected in parallel. Of course, a plurality of cold station units a may be connected to a plurality of evaporators 17. When the air conditioner works, the flow of the chilled water passing through the evaporator 17 is controlled through at least one water valve 16, so that the outlet air temperature of the evaporator 17 is controlled. By the arrangement, the data center can conveniently arrange servers on shelves in stages and in a modularized manner.
In the embodiment, the cold station unit A and the tail end unit B of the integrated cold station system are in modularized integrated arrangement, so that rapid construction and operation maintenance are facilitated.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A cold station unit for use in an integrated cold station system comprising an end unit, wherein: the system comprises a circulating refrigerant pipeline, and a compressor, a condenser, a liquid pump, a throttling device and a heat exchanger which are connected with the circulating refrigerant pipeline, wherein the circulating refrigerant pipeline is used for circulating refrigerant medium, the compressor is connected with a first bypass pipeline in parallel, the liquid pump is connected with a second bypass pipeline in parallel, the compressor and the first bypass pipeline are alternatively switched on and off, and the liquid pump and the second bypass pipeline are alternatively switched on and off; the heat exchanger is communicated with a circulating chilled water pipeline of the tail end unit, and the circulating chilled water pipeline and the circulating refrigerant pipeline exchange heat in the heat exchanger.
2. The cold station unit of claim 1, wherein: the first bypass pipeline is provided with a first one-way valve, the circulating refrigerant pipeline between the inlet and the outlet of the first bypass pipeline is provided with a second one-way valve connected with the first one-way valve in parallel, and the conduction directions of the first one-way valve and the second one-way valve are the same and are in the direction from the inlet to the outlet of the compressor; and/or
The second bypass pipeline is provided with a third one-way valve, the circulating refrigerant pipeline between the inlet and the outlet of the second bypass pipeline is provided with a fourth one-way valve connected with the third one-way valve in parallel, and the conduction directions of the third one-way valve and the fourth one-way valve are the same and are all along the direction from the inlet to the outlet of the liquid pump.
3. The cold station unit according to claim 1 or 2, wherein the compressor, the condenser, the liquid pump, the throttling device and the heat exchanger are connected in series in sequence, and a refrigerant outlet of the heat exchanger is communicated with an inlet of the compressor.
4. The cold station unit of claim 1 or 2, further comprising an accumulator disposed in the circulating refrigerant line.
5. The cold station unit of claim 1, wherein the throttling device comprises an expansion valve.
6. An integrated cold station system, comprising:
the cold station unit of any one of claims 1-5;
the tail end unit comprises a circulating chilled water pipeline, a chilled water pump and at least one evaporator, wherein the chilled water pump and the at least one evaporator are arranged in the circulating chilled water pipeline, and chilled water circulates in the circulating chilled water pipeline.
7. The integrated cold station system of claim 6, wherein said integrated cold station system has at least one of the following modes:
a compressor cooling mode in which the compressor and the second bypass line are connected and the first bypass line and the liquid pump are disconnected;
a liquid pump heat pipe refrigeration mode, wherein in the liquid pump heat pipe refrigeration mode, the first bypass pipeline is communicated with the liquid pump, and the compressor is disconnected with the second bypass pipeline;
and a hybrid refrigeration mode in which the compressor and the liquid pump are on and the first bypass line and the second bypass line are off.
8. The integrated cold station system of claim 6 or 7, wherein said end unit further comprises a water valve, said end unit having one said evaporator or a plurality of said evaporators in parallel, the number of said water valves being greater than or equal to the number of said evaporators, each said evaporator being in series with at least one said water valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122587431.0U CN216752525U (en) | 2021-10-26 | 2021-10-26 | Cold station unit and integrated cold station system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122587431.0U CN216752525U (en) | 2021-10-26 | 2021-10-26 | Cold station unit and integrated cold station system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115377778A (en) * | 2022-10-24 | 2022-11-22 | 中国航天三江集团有限公司 | Optical fiber laser thermal control device and method based on two-phase fluid |
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2021
- 2021-10-26 CN CN202122587431.0U patent/CN216752525U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115377778A (en) * | 2022-10-24 | 2022-11-22 | 中国航天三江集团有限公司 | Optical fiber laser thermal control device and method based on two-phase fluid |
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