CN114340299A - Refrigeration station system and control method - Google Patents
Refrigeration station system and control method Download PDFInfo
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- CN114340299A CN114340299A CN202011066223.XA CN202011066223A CN114340299A CN 114340299 A CN114340299 A CN 114340299A CN 202011066223 A CN202011066223 A CN 202011066223A CN 114340299 A CN114340299 A CN 114340299A
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Abstract
The invention discloses a refrigeration station system and a control method. Wherein, the method comprises the following steps: acquiring detection parameters of a specified position in a refrigerating station system; determining a refrigeration mode according to the detection parameters; carrying out frequency conversion control on a designated device in the refrigerating station system according to the refrigerating mode of the refrigerating station system and the detection parameters of the designated position; wherein the cooling mode includes: a natural cooling mode, a compressor cooling mode, and a hybrid cooling mode. The invention solves the technical problem that the whole energy consumption index of a machine room is reduced because the main machine is far away from a cooling water system and the tail end of the machine room in the prior art, so that the load of a chilled water pump/a cooling water pump is large; the refrigeration station system can reasonably adjust the motor output of the cooling water side and the chilled water side according to the actual load, and the energy-saving operation of partial load is realized.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a refrigerating station system and a control method.
Background
The existing large-scale chilled water data center generally adopts a large-scale centrifugal cold water host (namely a refrigeration assembly), the host needs to be installed in a special equipment room such as a basement, the construction of an air conditioning system also comprises a complicated cooling water pipe network system, a chilled water pipe network system, a cold source system (the cooling assembly) and the like, the host and the cooling assembly are independently arranged and are positioned at different positions of a building, and the transportation and the rapid deployment of the host and the cooling assembly are inconvenient.
In addition, because the large centrifugal cold water host used in the existing large chilled water data center adopts centralized cooling, and the host is far away from a cooling water system and the tail end, the load of a chilled water pump/a cooling water pump is large, and the overall energy consumption index (Power Usage efficiency, abbreviated as PUE) of a machine room is reduced.
Aiming at the problem that the load of a chilled water pump/cooling water pump is large and the overall energy consumption index of a machine room is reduced due to the fact that the main engine, the cooling water system and the tail end are far away in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a refrigeration station system and a control method, which at least solve the technical problem that the whole energy consumption index of a machine room is reduced because a main machine and a cooling water system and the tail end of the prior art are far away from each other, so that the load of a refrigeration water pump/a cooling water pump is large; the refrigeration station system can reasonably adjust the motor output of the cooling water side and the chilled water side according to the actual load, and the energy-saving operation of partial load is realized.
According to an aspect of an embodiment of the present invention, there is provided a freezer station system, the freezer station system comprising a freezer station subsystem, the freezer station subsystem comprising: a box body; the cooling water circulation assembly comprises a chilled water circulation pipeline and a refrigerating pump arranged on the chilled water circulation pipeline; the refrigeration assembly is used for refrigerating chilled water in a chilled water circulation pipeline and comprises a compression refrigeration unit, and the compression refrigeration unit comprises a first refrigeration loop, an evaporator and a compressor which are sequentially arranged on the first refrigeration loop; and the cooling assembly comprises an evaporative cooling heat dissipation device for cooling the refrigerating medium in the first refrigerating loop, wherein at least part of the cooling water circulation assembly, the compression refrigerating unit and the evaporative cooling heat dissipation device are positioned in the box body to form a modular structure.
Furthermore, the refrigeration station subsystem also comprises a partition board positioned in the box body, the partition board divides the interior of the box body into a first cavity and a second cavity, at least part of the cooling water circulation assembly, the evaporator, the compressor and at least part of pipe sections of the first refrigeration loop are positioned in the first cavity, and the evaporative cooling heat dissipation device is positioned in the second cavity.
Further, the evaporative cooling heat dissipation device is an open evaporative cooling heat dissipation device or a closed evaporative cooling heat dissipation device.
Further, when the evaporative cooling heat dissipation device is an open evaporative cooling heat dissipation device, the compression refrigeration unit further comprises a condenser arranged on the first refrigeration loop, the cooling assembly further comprises a cooling water circulation pipeline located between the condenser and the evaporative cooling heat dissipation device and a cooling pump arranged on the cooling water circulation pipeline, and the cooling pump is located in the first cavity of the box body.
Further, the refrigeration assembly also comprises a natural cooling heat exchange unit which is connected with the evaporator in parallel or in series.
Furthermore, the refrigeration station subsystem also comprises a first valve component arranged on a chilled water circulation pipeline, and the evaporator is connected with the natural cooling heat exchange unit in series or in parallel by opening and closing the first valve component.
Furthermore, the cooling assembly further comprises a cooling water circulation pipeline and a cooling pump arranged on the cooling water circulation pipeline, and the refrigerating station subsystem further comprises a second valve assembly arranged on the cooling water circulation pipeline, and the second valve assembly is opened and closed to be connected with a condenser and/or a natural cold heat exchange unit in the compression refrigerating unit and the cooling assembly to realize cooling.
Further, when the evaporative cooling heat dissipation device is a closed evaporative cooling heat exchange device, an evaporative condenser for cooling the first refrigeration loop is arranged in the closed evaporative cooling heat exchange device.
Furthermore, the refrigeration assembly further comprises a natural cold heat exchange unit which is connected with the evaporator in parallel or in series, when the evaporative cold heat dissipation device is a closed evaporative cold heat exchange device, the natural cold heat exchange unit comprises a second refrigeration loop, and a first natural cold heat exchanger which is used for performing natural cold refrigeration on the second refrigeration loop is arranged in the closed evaporative cold heat exchange device.
Furthermore, the refrigerating station system also comprises a power distribution device arranged in the first cavity of the box body, and the refrigerating assembly and the cooling assembly are electrically connected with the power distribution device.
Furthermore, an air outlet is arranged at the position of the box body corresponding to the air outlet of the evaporative cooling heat dissipation device, and an air inlet is arranged at the position of the box body corresponding to the air inlet of the evaporative cooling heat dissipation device.
Further, the freezer station system includes a plurality of spaced apart freezer station subsystems.
According to another aspect of the embodiments of the present invention, there is also provided a control method applied to a refrigeration station system, where the control method is applied to the refrigeration station system, and includes: acquiring detection parameters of a specified position in a refrigerating station system; determining a refrigeration mode according to the detection parameters; carrying out frequency conversion control on a designated device in the refrigerating station system according to the refrigerating mode of the refrigerating station system and the detection parameters of the designated position; wherein the cooling mode includes: a natural cooling mode, a compressor cooling mode, and a hybrid cooling mode.
Optionally, the determining the cooling mode according to the detection parameter includes: collecting the water outlet temperature and the chilled water return temperature of the evaporative cooling heat dissipation device under the condition that the detection parameters comprise the water outlet temperature and the chilled water return temperature of the evaporative cooling heat dissipation device; and determining a refrigeration mode according to the comparison result of the outlet water temperature and the return water temperature of the chilled water with the threshold value.
Further, optionally, determining the refrigeration mode according to the comparison result between the outlet water temperature and the return chilled water temperature and the threshold includes: when the outlet water temperature is less than or equal to the first temperature set value, determining that the refrigeration mode is a natural cooling mode; when the outlet water temperature is greater than the difference between the return water temperature of the chilled water and the second temperature set value, determining that the refrigeration mode is a compressor refrigeration mode; and when the outlet water temperature is greater than the first temperature set value and is less than or equal to the difference between the return water temperature of the chilled water and the second temperature set value, determining that the refrigeration mode is a mixed refrigeration mode.
Optionally, under the condition that the refrigeration mode is the natural cooling mode, controlling the compression refrigeration unit, the electric regulating valve on the chilled water inlet pipeline between the first end and the second end of the second refrigeration loop, the electric regulating valve on the first cooling water inlet pipeline between the node where the first cooling water inlet pipeline and the second cooling water inlet pipeline are connected and the electric regulating valve on the first cooling water inlet pipeline between the node where the first cooling water inlet pipeline and the second cooling water outlet pipeline are connected to be closed, and opening the evaporative cooling heat dissipation device, the refrigeration pump, the cooling pump, the electric regulating valve on the second chilled water outlet pipeline, the electric regulating valve on the second refrigeration loop, the electric regulating valve on the second cooling water inlet pipeline and the electric regulating valve on the third cooling water outlet pipeline; under the condition that the refrigeration mode is a compressor refrigeration mode, controlling an evaporative cooling heat dissipation device, a compression refrigeration unit, a refrigeration pump, a cooling pump, an electric regulating valve on a chilled water inlet pipeline between a first end and a second end of a second refrigeration loop, an electric regulating valve on a first cooling water inlet pipeline between a node where the first cooling water inlet pipeline is connected with the second cooling water inlet pipeline and a node where the first cooling water inlet pipeline is connected with the second cooling water outlet pipeline, and an electric regulating valve on the first cooling water inlet pipeline to be opened, and closing the electric regulating valve on the second chilled water outlet pipeline, the electric regulating valve on the second refrigeration loop, the electric regulating valve on the second cooling water inlet pipeline and an electric regulating valve on a third cooling water outlet pipeline; and under the condition that the refrigeration mode is a mixed refrigeration mode, controlling an electric control valve on a second chilled water outlet pipeline, an electric control valve on a chilled water inlet pipeline between the first end and the second end of a second refrigeration loop, an electric control valve on a first cooling water inlet pipeline between a node where a first cooling water inlet pipeline and a second cooling water inlet pipeline are connected and a node where the first cooling water inlet pipeline and the second cooling water outlet pipeline are connected, and an electric control valve on a third cooling water outlet pipeline to be closed, and opening the electric control valves on the compression refrigeration unit, the evaporative cooling heat dissipation device, the refrigeration pump, the cooling pump, the chilled water inlet pipeline, the second refrigeration loop, the second cooling water inlet pipeline and the first cooling water inlet pipeline.
Optionally, performing frequency conversion control on a designated device in the freezer station system according to the refrigeration mode of the freezer station system and the detection parameter of the designated location includes: the detection parameters at the designated location further include: acquiring the temperature difference of the cooling water supply and return water under the condition that the temperature difference of the cooling water supply and return water exists; comparing the temperature difference of the cooling water supply and return water temperature with a first set value to obtain a comparison result; and according to the comparison result, carrying out variable frequency control on a designated device in the refrigerating station system, wherein the designated device comprises a cooling pump.
Further, optionally, performing variable frequency control on a designated device in the freezer station system according to the comparison result includes: controlling a cooling pump to keep the current rotating speed under the condition that the temperature difference of the cooling water supply return water temperature is equal to a first set value; controlling the rotating speed of the cooling pump to reach a first rotating speed under the condition that the temperature difference of the cooling water supply return water temperature is larger than a first set value; controlling the rotating speed of the cooling pump to reach a second rotating speed under the condition that the temperature difference of the cooling water supply return water temperature is smaller than a first set value; wherein the first rotational speed is greater than the second rotational speed.
Optionally, performing frequency conversion control on a designated device in the freezer station system according to the refrigeration mode of the freezer station system and the detection parameter of the designated location includes: the detection parameters at the designated location further include: acquiring the pressure difference of the supply water pressure and the return water pressure of the chilled water under the condition that the pressure difference of the supply water pressure and the return water pressure of the chilled water exists; comparing the pressure difference of the supply water pressure and the return water pressure of the chilled water with a second set value to obtain a comparison result; and carrying out variable frequency control on a designated device in the refrigerating station system according to the comparison result, wherein the designated device comprises a refrigerating pump.
Further, optionally, performing variable frequency control on a designated device in the freezer station system according to the comparison result includes: under the condition that the pressure difference of the chilled water supply and return water pressure is equal to a second set value, controlling the refrigerating pump to keep the current rotating speed; under the condition that the pressure difference of chilled water supply and return water pressure is smaller than a second set value, controlling the rotating speed of the refrigerating pump to reach a first rotating speed, wherein the first rotating speed is larger than the current rotating speed; under the condition that the pressure difference of the chilled water supply and return water pressure is greater than a second set value, controlling the rotating speed of the refrigerating pump to reach a second rotating speed, wherein the second rotating speed is less than the current rotating speed; wherein the first rotational speed is greater than the second rotational speed.
Optionally, performing frequency conversion control on a designated device in the freezer station system according to the refrigeration mode of the freezer station system and the detection parameter of the designated location includes: the detection parameter of the designated position is the outlet water temperature of the cooled evaporative cooling heat dissipation device; comparing the outlet water temperature of the cooled evaporative cooling heat dissipation device, the preset cooling value and the local wet bulb temperature to obtain a comparison result; and carrying out variable frequency control on a designated device in the refrigerating station system according to the comparison result, wherein the designated device comprises an evaporative cooling heat dissipation device.
Optionally, when the set value of the outlet water temperature is greater than or equal to the sum of the local wet bulb temperature and the preset cooling value, performing frequency conversion control on a designated device in the refrigeration station system according to the comparison result includes: when the outlet water temperature of the cooled evaporative cooling heat dissipation device is less than the sum of the local wet bulb temperature and the preset cooling value, controlling the rotation speed of the evaporative cooling heat dissipation device to be reduced to a second rotation speed; when the water outlet temperature of the cooled evaporative cooling heat dissipation device is greater than the sum of the local wet bulb temperature and the preset cooling value and the water outlet temperature of the cooled evaporative cooling heat dissipation device is less than the set water outlet temperature value, controlling the rotation speed of the evaporative cooling heat dissipation device to be reduced to a second rotation speed; and when the water outlet temperature of the cooled evaporative cooling heat dissipation device is greater than or equal to the water outlet temperature set value, controlling the rotation speed of the evaporative cooling heat dissipation device to be increased to a first rotation speed.
Optionally, when the set value of the outlet water temperature is less than or equal to the sum of the local wet bulb temperature and the preset cooling value, performing frequency conversion control on a designated device in the refrigeration station system according to the comparison result includes: when the temperature of the cooled outlet water of the evaporative cooling heat dissipation device is greater than or equal to the sum of the local wet bulb temperature and a preset cooling value, controlling the rotation speed of the evaporative cooling heat dissipation device to be increased to a first rotation speed; when the outlet water temperature of the cooled evaporative cooling heat dissipation device is less than the sum of the local wet bulb temperature and the preset cooling value and the outlet water temperature of the cooled evaporative cooling heat dissipation device is greater than the outlet water temperature set value, controlling the rotation speed of the evaporative cooling heat dissipation device to be reduced to a second rotation speed; and when the outlet water temperature of the cooled evaporative cooling heat dissipation device is lower than the outlet water temperature set value, controlling the rotation speed of the evaporative cooling heat dissipation device to be reduced to a second rotation speed.
In the embodiment of the invention, the refrigeration station is adopted to realize nearby heat dissipation through nearby installation, and a nearby refrigeration mode is adopted to obtain the detection parameters of a specified position in the refrigeration station system; determining a refrigeration mode according to the detection parameters; carrying out frequency conversion control on a designated device in the refrigerating station system according to the refrigerating mode of the refrigerating station system and the detection parameters of the designated position; wherein the cooling mode includes: the system comprises a main machine, a cooling water system and a cooling water pump, wherein the main machine comprises a main machine body, a main machine body and a cooling water system, the main machine body is connected with the main machine body, the cooling water system is connected with the main machine body, the main machine body is connected with the cooling water system, and the cooling water system is connected with the main machine body.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic block diagram of a cabinet of a freezer subsystem of an embodiment of a freezer system according to the present invention;
FIG. 2 is a schematic structural view of a freezer subsystem of an embodiment of a freezer system according to the present invention assembled with a chilled water plant;
FIG. 3 is a schematic block diagram of a first example of a freezer station system according to the present invention;
FIG. 4 is a schematic diagram of a second example of a freezer station system according to the present invention;
FIG. 5 is a schematic block diagram of a third example of a freezer station system according to the present invention;
FIG. 6 is a schematic diagram of a fourth example of a freezer station system according to the present invention;
fig. 7 is a flowchart illustrating a control method applied to a freezer station system according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a cold station subsystem; 20. a box body; 21. a partition plate; 22. an air outlet; 23. an air inlet; 24. hoisting the structure; 25. a carrying structure; 26. a first cavity; 27. a second cavity; 30. a chilled water flow line; 31. a chilled water inlet line; 32. a first chilled water outlet pipeline; 33. a second chilled water outlet pipeline; 34. a first three-way valve; 35. a first two-way valve; 36. a second three-way valve; 37. a second two-way valve; 38. a freeze pump; 40. a refrigeration assembly; 41. a compression refrigeration unit; 411. a first refrigeration circuit; 412. an evaporator; 413. a compressor; 414. a condenser; 42. a natural cooling heat exchange unit; 421. a second refrigeration circuit; 422. a heat exchanger; 50. a cooling assembly; 511. a first cooling water inlet pipeline; 512. a first cooling water outlet pipeline; 513. a second cooling water inlet pipeline; 514. a second cooling water outlet pipeline; 515. a third cooling water outlet pipeline; 52. an evaporative cooling heat sink; 521. a closed evaporative cooling heat exchange device; 522. a natural cooling heat exchanger; 53. a cooling pump; 54. a third two-way valve; 55. a third three-way valve; 56. a fourth two-way valve; 57. a fourth three-way valve; 60. a chilled water device; 70. a machine room; 80. a power distribution device.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
As shown in fig. 1, in the embodiment of the present application, the freezer station system includes a freezer station subsystem 10, the freezer station subsystem 10 includes a box 20, a chilled water circulation assembly, a refrigeration assembly 40, and a cooling assembly 50, the chilled water circulation assembly includes a chilled water circulation pipeline 30 and a freezer pump 38 disposed on the chilled water circulation pipeline 30; the refrigeration assembly 40 is used for refrigerating the chilled water in the chilled water circulation pipeline 30, the refrigeration assembly 40 comprises a compression refrigeration unit 41, and the compression refrigeration unit 41 comprises a first refrigeration loop 411 and an evaporator 412 and a compressor 413 which are sequentially arranged on the first refrigeration loop 411; the cooling assembly 50 comprises an evaporative cold heat sink 52 for cooling the refrigerant medium in the first refrigeration circuit 411, wherein at least part of the chilled water flow assembly, the compression refrigeration unit 41 and the evaporative cold heat sink 52 are located inside the cabinet 20 to form a modular structure.
In the above arrangement, the chilled water circulation assembly, the refrigeration assembly 40 and the cooling assembly 50 are all integrated in one box 20, so that the refrigeration station subsystem 10 forms a modular structure, which is convenient for transportation and rapid deployment. Furthermore, a plurality of independent refrigeration station subsystems can be configured according to actual needs, so that flexibility is ensured.
Preferably, the refrigeration medium in the first refrigeration circuit 411 may be fluorine.
As shown in fig. 2, in an embodiment of the present application, the freezer station system includes two spaced apart freezer station subsystems 10. The two freezing station subsystems 10 are independently arranged, so that the arrangement is convenient, the influence degree of the surrounding environment on the arrangement of the freezing station subsystems is reduced, and the adjustability and the flexibility are higher.
Of course, in alternative embodiments not shown in the drawings of the present application, the freezer station system can also be configured to include only one freezer station subsystem 10 or at least three spaced apart freezer station subsystems 10, as desired.
The freezer station system in the technical scheme of the application can be provided with one or more (namely more than two) independent freezer station subsystems 10 according to actual needs, so that the flexibility and the adaptability of the arrangement of the freezer station system are improved.
As shown in fig. 1 and 3-6, in the embodiment of the present application, the refrigeration station subsystem 10 further includes a partition 21 located in the box 20, the partition 21 divides the interior of the box 20 into a first cavity 26 and a second cavity 27, at least a portion of the chilled water flow assembly, the evaporator 412, the compressor 413, and at least a portion of the pipe sections of the first refrigeration circuit 411 are located in the first cavity 26, and the evaporative cold heat sink 52 is located in the second cavity 27.
The interior of the box body 20 is divided into different cavities, so that the influence of heat emitted by the evaporative cold heat dissipation device 52 on the normal use of other components can be avoided; specifically, the cold heat dissipation device 52 is isolated from the chilled water circulation assembly and the refrigeration assembly 40 by the partition plate 21, so that the interference and erosion of the wet hot air flow in the second cavity 27 on the chilled water circulation assembly and the refrigeration assembly 40 can be prevented, the chilled water circulation assembly, the refrigeration assembly 40 and other assemblies of the refrigeration station subsystem 10 can be better protected, and the smooth operation of the refrigeration station subsystem 10 is ensured.
Preferably, the partition 21 may be a metal wall, a brick wall, a foam wall, or other structure capable of functioning to isolate the flow of hot and humid air.
In the embodiment of the present application, the evaporation-cooling heat dissipation device 52 is an open evaporation-cooling heat exchange device or a closed evaporation-cooling heat exchange device, so that the refrigeration station system has more choices, and the adaptability of the refrigeration station system is improved.
As shown in fig. 3 to 5, in the embodiment of the present application, the evaporative cold heat sink 52 is an open evaporative cold heat sink, the compression refrigeration unit 41 further includes a condenser 414 disposed on the first refrigeration circuit 411, the cooling assembly 50 further includes a cooling water circulation line between the condenser 414 and the evaporative cold heat sink 52, and a cooling pump 53 disposed on the cooling water circulation line, and the cooling pump 53 is disposed in the first cavity 26 of the box 20.
In the above arrangement, the cooling water in the cooling water circulation pipeline cools the refrigeration medium in the first refrigeration loop 411 at the condenser 414, then flows back to the evaporative cold heat dissipation device 52 to dissipate heat and cool, and finally returns to the condenser 414 again, so as to realize cooling circulation of the refrigeration medium in the first refrigeration loop 411 and cool the refrigeration medium in the first refrigeration loop 411; the cooling pump 53 is used for providing power for the flow of the cooling water in the process, and the cooling pump 53 is used for guiding and conveying the cooling water; and the cooling pump 53 is located in the first cavity 26, so that the wet hot air flow in the second cavity 27 can be prevented from causing interference and erosion on the cooling pump 53, and smooth operation of the cooling pump 53 is ensured.
As shown in fig. 6, in the embodiment of the present application, the evaporative cold heat dissipation device 52 is a closed evaporative cold heat exchange device, and an evaporative condenser 521 for cooling the first refrigeration circuit 411 is disposed in the closed evaporative cold heat exchange device. The refrigeration medium in the first refrigeration loop 411 is cooled by the evaporative condenser 521 in the closed evaporative cooling heat exchanger, so that the cyclic utilization of the refrigeration medium is realized.
Preferably, when the evaporative cold heat dissipation device 52 is a closed evaporative cold heat dissipation device, the evaporative condenser 521 is a coil-shaped structure, so that the cooling efficiency of the closed evaporative cold heat dissipation device on the refrigerant in the first refrigeration circuit 411 can be improved.
As shown in fig. 3 and 4, in the embodiment of the present application, the refrigeration unit 40 further includes a free cooling heat exchange unit 42 disposed in parallel or in series with the evaporator 412 of the compression refrigeration unit 41.
In the above arrangement, the evaporator 412 of the compression refrigeration unit 41 is connected in parallel with the natural cooling heat exchange unit 42, and the system operates in the compressor refrigeration mode, that is, the evaporator 412 cools all or part of the chilled water in the chilled water circulation pipeline 30; the evaporator 412 and the natural cooling heat exchange unit 42 are arranged in series, the system runs in a natural cooling mode or a mixed refrigeration mode, namely the natural cooling heat exchange unit 42 preferentially cools the chilled water in the chilled water circulation pipeline 30, and the evaporator 412 performs supplementary secondary cooling under the condition of insufficient cold quantity, so that the equipment can select a proper refrigeration mode to cool the chilled water according to actual conditions and actual needs, and the refrigeration energy efficiency of the refrigeration station system is improved.
The compression refrigerating unit 41 and the natural cold heat exchange unit 42 are both positioned in the first cavity 26, so that the length of a pipeline can be shortened, and the arrangement is simplified; the compression refrigeration unit 41 and the natural cooling heat exchange unit 42 can be arranged in the front and back direction along the height direction or the horizontal direction, so that the space can be saved, the space can be reasonably utilized, the arrangement positions of the compression refrigeration unit 41 and the natural cooling heat exchange unit 42 can be flexibly adjusted according to the space condition, and the space utilization rate and the adaptability of a refrigerating station system are improved.
Of course, in an alternative embodiment not shown in the drawings, the natural cold heat exchange unit 42 may be disposed in the second cavity 27 according to actual conditions, that is, the natural cold heat exchange unit 42 and the evaporative cold heat sink 52 are located in the same cavity.
As shown in fig. 3, 4 and 6, in the embodiment of the present application, the refrigeration station subsystem 10 further includes a first valve assembly disposed on the chilled water circulation line 30, and by opening and closing the first valve assembly, the evaporator 412 of the compression refrigeration unit 41 can be connected in series or in parallel with the free cooling heat exchange unit 42.
In the above arrangement, the first valve assembly is used for switching the refrigeration mode of the refrigeration station subsystem 10, and the refrigeration station subsystem 10 can cool the chilled water only through the evaporator 412, only through the free cooling and heat exchanging unit 42, or through the free cooling and heat exchanging unit 42 and the evaporator 412 at the same time by switching the first valve assembly, so that the refrigeration station subsystem 10 can select a proper refrigeration mode according to actual needs, and the waste of resources can be reduced, and the system is energy-saving and environment-friendly.
As shown in fig. 3, 4 and 6, in the embodiment of the present application, the chilled water circulation pipeline 30 includes a chilled water inlet pipeline 31 and a first chilled water outlet pipeline 32, the chilled water inlet pipeline 31 and the first chilled water outlet pipeline 32 are respectively connected to a water inlet and a water outlet of an evaporator 412 in the compression refrigeration unit 41, the natural cooling heat exchange unit 42 is disposed at an upstream position of a node where the chilled water inlet pipeline 31 is connected to the compression refrigeration unit 41, and the natural cooling heat exchange unit 42 includes the second refrigeration loop 421.
As shown in fig. 3, 4 and 6, in the embodiment of the present application, the chilled water circulation pipeline 30 further includes a second chilled water outlet pipeline 33, a first end of the second chilled water outlet pipeline 33 is connected to the chilled water inlet pipeline 31, and a second end of the second chilled water outlet pipeline 33 is connected to the first chilled water outlet pipeline 32.
It should be noted that the node at which the first end of the second chilled water outlet pipe 33 is connected to the chilled water inlet pipe 31 is located between the node at which the second end of the second refrigeration circuit 421 is connected to the chilled water inlet pipe 31 and the node at which the chilled water inlet pipe 31 is connected to the compression refrigeration unit 41.
Specifically, as shown in fig. 3, in the embodiment of the present application, the first valve assembly includes two first two-way valves 35 and two second two-way valves 37, one of the two first two-way valves 35 is located on the second refrigeration circuit 421, and the other of the two first two-way valves 35 is disposed on the chilled water inlet pipe 31 and between the first end and the second end of the second refrigeration circuit 421; one of the two second two-way valves 37 is disposed on the chilled water inlet line 31 between the second end of the second refrigeration circuit 421 and the first end of the evaporator 412, and the other of the two second two-way valves 37 is disposed on the second chilled water outlet line 33.
In the above arrangement, by turning on or off the two first two-way valves 35, the return chilled water can have two flow paths: one is to open the first two-way valve 35 on the second refrigeration loop 421, close the first two-way valve 35 on the chilled water inlet pipe 31 and between the first end and the second end of the second refrigeration loop 421, at this time, the chilled water inlet pipe 31 is communicated with the second refrigeration loop 421, the chilled water return water enters the second refrigeration loop 421 from the first end of the second refrigeration loop 421 through the chilled water inlet pipe 31, and flows back to the chilled water inlet pipe 31 from the second end of the second refrigeration loop 421 after being subjected to heat exchange and temperature reduction at the second natural cooling heat exchanger 422, and then flows to the compression refrigeration unit 41; the other is to open the first two-way valve 35 disposed on the chilled water inlet pipe 31 and located between the first end and the second end of the second refrigeration circuit 421, and close the first two-way valve 35 located on the second refrigeration circuit 421, at this time, the chilled water inlet pipe 31 is not communicated with the second refrigeration circuit 421, and the chilled water return water directly flows to the compression refrigeration unit 41 through the chilled water inlet pipe 31; the two flow paths of the return chilled water correspond to two of the three refrigeration modes of the refrigeration station subsystem 10, and one mode is a mixed refrigeration mode in which the chilled water is refrigerated twice through the natural cooling and heat exchange unit 42 and then the compression refrigeration unit 41; the other is to refrigerate the chilled water only by the compression refrigerating unit 41, which is a compressor refrigerating mode; in other words, the two refrigeration modes of the refrigeration station subsystem 10 can be switched by controlling the opening or closing of the two first two-way valves 35, and the method is simple, convenient, fast, easy to operate and high in adjustability.
In the above technical solution, the two second two-way valves 37 are turned on or off, so that the chilled water flowing to the compression refrigeration unit 41 through the chilled water inlet pipeline 31 has two flow paths: one is to open the second two-way valve 37 disposed on the second chilled water outlet pipe 33, and close the second two-way valve 37 disposed on the chilled water inlet pipe 31 and located between the second end of the second refrigeration circuit 421 and the first end of the evaporator 412, at this time, the second chilled water outlet pipe 33 is communicated with the chilled water inlet pipe 31, and the chilled water cooled by the second natural cooling heat exchanger 422 flows to the first chilled water outlet pipe 32 through the second chilled water outlet pipe 33 without passing through the compression refrigeration unit 41; the other is to open the second two-way valve 37 disposed on the chilled water inlet pipe 31 and located between the second end of the second refrigeration circuit 421 and the first end of the evaporator 412, and close the second two-way valve 37 disposed on the second chilled water outlet pipe 33, at this time, the second chilled water outlet pipe 33 is not communicated with the chilled water inlet pipe 31, and the chilled water directly flows to the compression refrigeration unit 41 through the chilled water inlet pipe 31, performs refrigeration in the compression refrigeration unit 41, and then flows to the first chilled water outlet pipe 32. By the combined action of the two first two-way valves 35 and the two second two-way valves 37, the refrigeration station subsystem 10 can refrigerate the chilled water only through the natural cooling heat exchange unit 42, which is a natural cooling mode; or the chilled water is refrigerated twice through the natural cooling and heat exchanging unit 42 and then the compression refrigerating unit 41, which is a mixed refrigeration mode.
In the above technical solution, under the common switching action of the two first two-way valves 35 and the two second two-way valves 37, the refrigeration station subsystem 10 has three refrigeration modes, and a proper refrigeration mode can be selected to refrigerate chilled water according to actual conditions and actual needs, so that both the refrigeration station subsystem 10 and the refrigeration station system have wide adaptability, and energy can be saved; the two first two-way valves 35 and the two second two-way valves 37 are simple, convenient, fast and easy to operate in a switching mode, and have strong adjustability.
Preferably, the second free-cooling heat exchanger 422 may be a water-water heat exchanger.
Of course, as shown in fig. 4 and 6, in the embodiment of the present application, the first valve assembly includes a first three-way valve 34 and a second three-way valve 36, the first three-way valve 34 is located at a node where the first end of the second refrigeration circuit 421 is connected to the chilled water inlet line 31, and the second three-way valve 36 is located at a node where the first end of the second chilled water outlet line 33 is connected to the chilled water inlet line 31.
In the above arrangement, the connection or disconnection between the chilled water inlet line 31 and the second refrigeration circuit 421 is controlled by controlling the connection of the different valve ports of the first three-way valve 34; the connection or disconnection between the second chilled water outlet line 33 and the chilled water inlet line 31 is controlled by controlling the connection of different valve ports of the second three-way valve 36. Under the common switching action of the first three-way valve 34 and the second three-way valve 36, the refrigeration station subsystem 10 can be switched among the three refrigeration modes, so that the refrigeration station subsystem 10 and the refrigeration station system have wide adaptability, and energy can be saved; the switching mode of the first three-way valve 34 and the second three-way valve 36 is simple, convenient, fast and easy to operate, and the adjustability is strong.
As shown in fig. 3 and 4, in the embodiment of the present invention, the evaporative cold heat sink 52 is an open evaporative cold heat sink, and the refrigeration station subsystem 10 further includes a second valve assembly disposed on the cooling water circulation pipeline, and the second valve assembly is opened and closed to connect with the compression refrigeration unit 41 and/or the natural cold heat exchange unit 42 and the cooling assembly 50 for cooling.
In the above arrangement, the cooling module 50 can adaptively select a suitable cooling mode according to the cooling mode selected by the freezer subsystem 10, and the second valve assembly is used for switching the cooling mode of the cooling module 50, so that the cooling module 50 communicates with the compression refrigerator group 41 and/or the natural cold heat exchange unit 42 (i.e. the cooling module 50 communicates with only the condenser 414 or the second natural cold heat exchanger 422, or communicates with both the condenser 414 and the second natural cold heat exchanger 422), so that the cooling module 50 cools the compression refrigerator group 41 and/or the natural cold heat exchange unit 42.
Specifically, the cooling water circulation pipeline includes a first cooling water inlet pipeline 511, a first cooling water outlet pipeline 512, a second cooling water inlet pipeline 513 and a second cooling water outlet pipeline 514, a first end of the first cooling water inlet pipeline 511 is connected with a first end of the water side of the condenser 414, a second end of the first cooling water inlet pipeline 511 is connected with a first end of the evaporative cold heat dissipation device 52, a first end of the first cooling water outlet pipeline 512 is connected with a second end of the water side of the condenser 414, and a second end of the first cooling water outlet pipeline 512 is connected with a second end of the evaporative cold heat dissipation device 52; a first end of the second cooling water inlet pipeline 513 is connected with a first end of the cold source side of the second natural cooling heat exchanger 422, a second end of the second cooling water inlet pipeline 513 is connected with the first cooling water inlet pipeline 511, a first end of the second cooling water outlet pipeline 514 is connected with a second end of the cold source side of the natural cooling heat exchanger, and a second end of the second cooling water outlet pipeline 514 is connected with the first cooling water inlet pipeline 511.
Specifically, as shown in fig. 3, in the embodiment of the present application, the second valve assembly includes two third two-way valves 54 and two fourth two-way valves 56, one of the two third two-way valves 54 is disposed on the second cooling water inlet pipeline 513, and the other of the two third two-way valves 54 is disposed on the first cooling water inlet pipeline 511, and is located between a node where the first cooling water inlet pipeline 511 and the second cooling water inlet pipeline 513 are connected and a node where the first cooling water inlet pipeline 511 and the second cooling water outlet pipeline 514 are connected; one of the two fourth two-way valves 56 is disposed on the third cooling water outlet pipe 515, and the other of the two fourth two-way valves 56 is disposed on the first cooling water inlet pipe 511 between a node at which the first cooling water inlet pipe 511 is connected to the first end of the third cooling water outlet pipe 515 and a node at which the first end of the first cooling water inlet pipe 511 is connected to the first end of the condenser 414. It should be noted that the node at which the first end of the third cooling water outlet pipe 515 is connected to the first cooling water inlet pipe 511 is located between the node at which the second end of the second cooling water outlet pipe 514 is connected to the first cooling water inlet pipe 511 and the node at which the first end of the first cooling water inlet pipe 511 is connected to the condenser 414.
In the above arrangement, by turning on or off the two third two-way valves 54, the cooling water can have two flow paths, one being in the natural cooling refrigeration mode or the mixed cooling refrigeration mode, the third two-way valve 54 provided on the second cooling water inlet line 513 is opened, and the third two-way valve 54 provided on the first cooling water inlet line 511 and located between the node where the first cooling water inlet line 511 and the second cooling water inlet line 513 are connected and the node where the first cooling water inlet line 511 and the second cooling water outlet line 514 are connected is closed, and at this time, the first cooling water inlet pipe 511 is communicated with the second cooling water inlet pipe 513, the cooling water in the first cooling water inlet pipe 511 enters the cooling water circulation pipe through the second end of the second cooling water inlet pipe 513, and refrigerates the chilled water flowing through the second refrigeration circuit 421 at the second natural cooling heat exchanger 422; in the other mode, in the cooling mode of the compressor, the third two-way valve 54 disposed on the first cooling water inlet pipeline 511 and located between the node where the first cooling water inlet pipeline 511 and the second cooling water inlet pipeline 513 are connected and the node where the first cooling water inlet pipeline 511 and the second cooling water outlet pipeline 514 are connected is opened, and the third two-way valve 54 disposed on the second cooling water inlet pipeline 513 is closed, at this time, the first cooling water inlet pipeline 511 and the second cooling water inlet pipeline 513 are not communicated, and the cooling water directly flows to the condenser 414 through the first cooling water inlet pipeline 511.
In the above technical solution, according to the refrigeration mode selected by the refrigeration station subsystem 10, the cooling module 50 can adaptively select a suitable cooling mode; by controlling the opening or closing of the two third two-way valves 54, the cooling module 50 can be communicated with both the second free cooling heat exchanger 422 and the condenser 414, or the cooling module 50 can be communicated with only the condenser 414, so that the cooling water in the cooling water circulation line can perform a cooling function.
In the above technical solution, by turning on or turning off the two fourth two-way valves 56, the cooling water flowing to the condenser 414 through the first cooling water inlet pipeline 511 has two flow paths, and when one is a natural cooling refrigeration mode, the fourth two-way valve 56 disposed on the third cooling water outlet pipeline 515 is turned on, and the fourth two-way valve 56 disposed on the first cooling water inlet pipeline 511 and located between a node where the first cooling water inlet pipeline 511 is connected to the first end of the third cooling water outlet pipeline 515 and a node where the first end of the first cooling water inlet pipeline 511 is connected to the first end of the condenser 414 is turned off, at this time, the third cooling water outlet pipeline 515 is communicated with the first cooling water inlet pipeline 511, and the cooling water in the first cooling water inlet pipeline 511 flows to the first cooling water outlet pipeline 512 through the third cooling water outlet pipeline 515; in the hybrid refrigeration mode or the compressor refrigeration mode, the fourth two-way valve 56 disposed on the first cooling water inlet pipe 511 and located between the node where the first cooling water inlet pipe 511 is connected to the first end of the third cooling water outlet pipe 515 and the node where the first end of the first cooling water inlet pipe 511 is connected to the first end of the condenser 414 is opened, and the fourth two-way valve 56 disposed on the third cooling water outlet pipe 515 is closed, at this time, the third cooling water outlet pipe 515 is not connected to the first cooling water inlet pipe 511, and the cooling water in the first cooling water inlet pipe 511 flows to the condenser 414 and cools the refrigerant in the first refrigeration circuit 411 at the condenser 414.
Through the combined action of the two third two-way valves 54 and the two fourth two-way valves 56, the cooling module 50 can be communicated with only one of the second natural cooling heat exchanger 422 and the condenser 414, or the cooling module 50 is communicated with the second natural cooling heat exchanger 422 and then communicated with the condenser 414, so that the refrigeration station subsystem 10 can refrigerate the chilled water only through the natural cooling heat exchange unit 42, or refrigerate the chilled water twice through the natural cooling heat exchange unit 42 and then the compression refrigeration unit 41.
In the above technical solution, under the common switching action of the two third two-way valves 54 and the two fourth two-way valves 56, the cooling module 50 has three cooling water circulation modes (i.e. three cooling modes are provided), and a proper cooling water circulation mode can be selected according to actual conditions and actual needs, so that pumping work can be reduced, energy is saved, and efficiency is increased; and the switching modes of the two third two-way valves 54 and the two fourth two-way valves 56 are simple, convenient, quick and easy to operate, and the adjustability is strong.
In other words, in the first example of the present application, the switching devices are all two-way valves, so that the valves are independent of each other, and the adjustability of the system is good.
Of course, as shown in fig. 4, in the embodiment of the present application, the second valve assembly includes a third three-way valve 55 and a fourth three-way valve 57, the third three-way valve 55 is located at a junction where the first cooling water inlet pipe 511 and the second cooling water inlet pipe 513 are connected, and the fourth three-way valve 57 is located at a junction where the first end of the third cooling water outlet pipe 515 and the first cooling water inlet pipe 511 are connected.
In the above arrangement, the communication between the first cooling water inlet pipeline 511 and the second cooling water inlet pipeline 513 is controlled or not controlled by controlling the communication between the different valve ports of the third three-way valve 55; the communication between the first cooling water inlet pipe 511 and the third cooling water outlet pipe 515 is controlled by controlling the communication between different valve ports of the fourth three-way valve 57. Under the common switching action of the third three-way valve 55 and the fourth three-way valve 57, the cooling assembly 50 can be switched among the three cooling water circulation modes, so that the cooling assembly 50 and a refrigeration station system have wide adaptability, the power consumption can be reduced, and the effects of energy conservation and efficiency improvement can be achieved; and the switching mode of the third three-way valve 55 and the fourth three-way valve 57 is simple, convenient, quick and easy to operate, and the adjustability is strong.
As shown in fig. 6, in the embodiment of the present application, the evaporative cooling heat dissipation device 52 is a closed evaporative cooling heat dissipation device, the natural cooling heat dissipation unit 42 includes a second refrigeration circuit 421, and a first natural cooling heat dissipation device 522 for performing natural cooling refrigeration on the second refrigeration circuit 421 is disposed in the closed evaporative cooling heat dissipation device. The chilled water in the second refrigeration loop 421 is cooled by the first natural cooling heat exchanger 522 in the closed evaporative cooling heat exchanger, so as to cool the chilled water; meanwhile, the natural cooling heat exchange unit 42 can cool the chilled water only by setting the second refrigeration loop 421, and other devices (such as the second natural cooling heat exchanger 422) do not need to be added, which is beneficial to saving cost and space and simplifying the structure of the refrigeration station system.
Preferably, the first free cooling heat exchanger 522 has a coil-like structure, so that the cooling efficiency of the closed evaporative cooling heat exchanger for the chilled water in the second refrigeration circuit 421 can be improved.
As shown in fig. 3-6, in the embodiment of the present application, the freezer station system further includes a power distribution device 80 disposed within the first cavity 26 of the cabinet 20, and the refrigeration assembly 40 and the cooling assembly 50 are electrically connected to the power distribution device 80.
In the above arrangement, the power distribution device 80 is connected to all the electric devices such as the evaporative cooling heat dissipation device 52, the compression refrigeration unit 41, the cooling pump 53, and the freezing pump 38 of the refrigeration station subsystem 10, and the power distribution device 80 is used for supplying power and controlling the electric devices such as the evaporative cooling heat dissipation device 52, the compression refrigeration unit 41, the cooling pump 53, and the freezing pump 38. The refrigeration assembly 40, the cooling assembly 50 and the power distribution device 80 are all arranged in the box body 20, so that the structure of the refrigeration station subsystem 10 is compact, the space adaptability of the refrigeration station subsystem 10 is stronger, and the transportation and the rapid deployment are convenient.
It should be noted that, according to the technical solution of the present application, the relative position relationship between the power distribution device 80 and the refrigeration assembly 40 and the cooling assembly 50 is not limited, and the power distribution device 80 may be arranged at a suitable position according to actual needs and actual situations (for example, a space is small, and the power distribution device 80 may be disposed between the refrigeration assembly 40 and the cooling assembly 50 in order to simplify the circuit among the power distribution device 80, the refrigeration assembly 40, and the cooling assembly 50).
Specifically, the refrigeration station subsystem 10 further includes a temperature detection device and a flow detection device, and the chilled water inlet pipeline 31, the first chilled water outlet pipeline 32, the first cooling water inlet pipeline 511, and the first cooling water outlet pipeline 512 are all provided with the temperature detection device and the flow detection device.
In addition, the refrigeration station subsystem 10 further includes a pressure detection device and a temperature and humidity detection device disposed in the box 20, the temperature detection device is configured to detect temperatures of the chilled water flowing through the chilled water inlet line 31 and the first chilled water outlet line 32 and the cooling water flowing through the first cooling water inlet line 511 and the first cooling water outlet line 512, and the pressure detection device and the temperature and humidity detection device are configured to detect pressures and temperatures inside and outside the box 20. The power distribution device 80 comprises a power distribution cabinet and a control part, the power distribution cabinet is used for supplying power to electric equipment such as the evaporation cold heat dissipation device 52, the compression refrigeration unit 41, the cooling pump 53 and the freezing pump 38, the control part is connected with each detection device and can acquire detection results of the detection devices, the control part controls the evaporation cold heat dissipation device 52, the cooling pump 53, the freezing pump 38 and other equipment according to the detection results, and the temperature of the chilled water flowing through the chilled water inlet pipeline 31 and the first chilled water outlet pipeline 32 and the temperature of the cooling water of the first chilled water inlet pipeline 511 and the first chilled water outlet pipeline 512 are adjusted to control the temperature of the chilled water finally flowing out from the first chilled water outlet pipeline 32.
Preferably, the control part comprises a centralized control microcomputer and a variable frequency controller, and is used for acquiring data such as temperature, flow, pressure, outdoor temperature and humidity of the whole system, and further calculating the cooling capacity requirement required by the outside, so that the variable frequency controller performs variable frequency control on the refrigeration pump 38, the cooling pump 53 and the evaporative cooling heat dissipation device 52, thereby reducing power consumption and realizing energy conservation. As shown in fig. 1, in the embodiment of the present application, an air outlet 22 is disposed on a position of the box 20 corresponding to an air outlet of the evaporative cooling heat dissipation device 52, and an air inlet 23 is disposed on a position of the box 20 corresponding to an air inlet of the evaporative cooling heat dissipation device 52.
In the above arrangement, the air outlet 22 corresponds to an air outlet of the evaporative cooling heat dissipation device 52, the air inlet 23 corresponds to an air inlet of the evaporative cooling heat dissipation device 52, the air outlet 22 is used for discharging hot air generated by the evaporative cooling heat dissipation device 52 to achieve heat dissipation, fresh air can be provided for the evaporative cooling heat dissipation device 52 by using the air inlet 23, and the arrangement of the air inlet 23 and the air outlet 22 can ensure air circulation in the evaporative cooling heat dissipation device 52 and ensure the refrigeration capacity and the production efficiency of the refrigeration station subsystem 10.
The air circulation in the evaporation cold heat dissipation device 52 can be guaranteed by the arrangement of the air inlet 23 and the air outlet 22 on the box body 20, so that the heat of cooling water in the cooling water circulation pipeline can be timely discharged through the evaporation cold heat dissipation device 52, the purpose of cooling the cooling water in the cooling water circulation pipeline through the evaporation cold heat dissipation device 52 is achieved, and the refrigerating capacity and the production efficiency of the refrigerating station subsystem 10 are guaranteed.
Preferably, the air outlet 22 and the air inlet 23 may be perforated or provided in the form of a louver or in the form of a grill.
Specifically, the case 20 includes top and bottom walls disposed opposite to each other and side walls connecting the top and bottom walls. The air outlet 22 is arranged on the top wall, and the air inlet 23 is arranged on the side wall. The top wall, the bottom wall and the side wall are enclosed to form an accommodating cavity, so that the chilled water circulation pipeline 30, the refrigerating assembly 40 and the cooling assembly 50 can be accommodated in the accommodating cavity, and the refrigerating station subsystem 10 is compact in structure and beneficial to saving of external space.
As shown in fig. 1, in the embodiment of the present invention, a hoisting structure 24 is provided on the box 20, a carrying structure 25 is provided at the bottom, and the hoisting structure 24 and the carrying structure 25 are used for moving the box 20.
Specifically, four corners of the top of the box 20 are provided with hoisting structures 24, the bottom of the box 20 is provided with a forklift carrying structure 25, and the box 20 can be used with a semitrailer in a matched manner, so that the refrigeration station subsystem 10 becomes a mobile cold source which does not need hoisting and is quick in response.
Preferably, the hoisting structure 24 may be a lifting lug.
Preferably, the carrying structure 25 may be a through hole provided at the bottom of the case 20. The support arm of fork truck is pegged graft with this through-hole and is cooperated, can utilize fork truck to carry box 20 to required position.
Preferably, the appropriate manner of moving the cabinet 20 or the freezer station subsystem 10 is selected based on the actual situation and needs, e.g., when a forklift is present on site, the cabinet 20 or the freezer station subsystem 10 may be transported through the transport structure 25 using a forklift.
Of course, in an alternative embodiment of the present invention, not shown in the drawings, the evaporative cold heat sink located on the right side of the transverse partition 21 inside the box 20 may also be maintenance-free (i.e. the box 20 is formed by a top wall and a bottom wall, and does not include side walls), and only the bottom plate and the frame required for the carrying structure 25 and the hoisting structure 24 are retained.
The invention provides a high-efficiency refrigerating station system capable of being rapidly deployed, which integrates the contents of a cooling water system (namely a cooling component 50), a refrigerating host (namely a refrigerating component 40) and the like, realizes rapid supply of goods through an integrated design, can adaptively adjust the supply of a refrigerating station subsystem 10 to chilled water according to the demand of chilled water equipment 60 to the chilled water, can simplify the deployment conditions of a cooling water pipe network system, a refrigerating water pipe network system and the like of the refrigerating station subsystem 10 according to actual conditions, simplifies the internal structure of the refrigerating station subsystem 10, and truly realizes engineering productization by optimal granularity configuration. But the distributed module of integral type freeze station (freezing station system promptly) deploys, is suitable for near cooling outside the wall of computer lab 70, need not to carry out big transformation to the building and can use at newly-built computer lab or transformation computer lab, can also realize the staging according to the computer lab construction progress and drop into, has simplified the project construction process greatly.
In the related art, a large centrifugal cold water main machine adopts centralized cooling, and the main machine is far away from a cooling water system and the tail end, so that the load of a freezing water pump (namely a freezing pump 38)/a cooling water pump (namely a cooling pump 53) is large, and the whole PUE (Power Usage efficiency) of a machine room is reduced; and all the centrifugal hosts must be arranged at one time before the building is closed, so that the initial investment cost is increased. In the technical scheme of the invention, the refrigerating water pump (namely the refrigerating pump 38) and the cooling water pump (namely the cooling pump 53) have smaller lifts, the refrigerating station subsystem 10 is installed nearby outside the wall, heat is radiated nearby, refrigeration is nearby, and a frequency conversion control technology of partial load is matched, so that the efficient and energy-saving operation of a machine room is realized.
Embodiments of the present application are described below with particular reference to the accompanying drawings:
first example
As shown in fig. 3, in the first example of the present invention, the refrigeration unit 40 includes a compression refrigeration unit 41 and a free cooling heat exchange unit 42 disposed in parallel or in series with an evaporator 412 of the compression refrigeration unit 41; the cooling assembly 50 is selectively communicated with the compression refrigerating unit 41 and/or the natural cold heat exchange unit 42 to cool the refrigerating medium; the first valve assembly comprises two first two-way valves 35 and two second two-way valves 37; the second valve assembly includes two third two-way valves 54 and two fourth two-way valves 56.
Specifically, as shown in fig. 3, in the first example, the refrigeration station subsystem 10 is mainly composed of a compression refrigeration unit 41, a refrigeration pump 38, a cooling pump 53, an evaporative cooling heat sink 52, a water-water heat exchanger (i.e., a second natural cooling heat exchanger 422), and the like, all of which are installed in a box 20 for transportation. The compression refrigeration unit 41 includes a compressor 413, a condenser 414, and an evaporator 412; wherein, the condenser, the evaporative cooling heat dissipation device, the cooling pump 53 and the cold source side of the water-water heat exchanger are sequentially connected on a cooling water circulation pipeline to form a cooling water circulation loop; the chilled water inlet pipeline 31, the load side of the water-water heat exchanger, the evaporator, the refrigerating pump 38 and the first chilled water outlet pipeline 32 are sequentially connected, and are connected with a water supply and return pipe of external chilled water through the chilled water inlet pipeline 31 and the first chilled water outlet pipeline 32 to form chilled water circulation.
An electric regulating valve (namely, a third two-way valve 54) is arranged on a pipeline (namely, a second cooling water inlet pipeline 513) between the outlet of the cooling pump 53 and the inlet of the cold source side of the water-water heat exchanger, and a connecting pipeline (namely, a first cooling water inlet pipeline 511 between a node where the first cooling water inlet pipeline 511 and the second cooling water inlet pipeline 513 are connected and a node where the first cooling water inlet pipeline 511 and the second cooling water outlet pipeline 514 are connected) and an electric regulating valve (namely, a third two-way valve 54) are arranged between the outlet of the cooling pump 53 and the outlet of the cold source side of the water-water heat exchanger; an electric control valve (i.e., the fourth two-way valve 56) is arranged on a pipeline (i.e., the first cooling water inlet pipeline 511) between the outlet on the cold source side of the water-water heat exchanger and the inlet of the condenser, and a connecting pipeline (i.e., the third cooling water outlet pipeline 515) and an electric control valve (i.e., the fourth two-way valve 56) are arranged between the outlet on the cold source side of the water-water heat exchanger and the outlet of the condenser.
An electric regulating valve (namely a first two-way valve 35) is arranged on a pipeline (namely the second refrigerating circuit 421) between a refrigerating water inlet (namely a refrigerating water inlet pipeline 31) of the refrigerating station and an inlet on the load side of the water-water heat exchanger, and a connecting pipeline (namely the refrigerating water inlet pipeline 31 between a first end and a second end of the second refrigerating circuit 421) and the electric regulating valve (namely the first two-way valve 35) are arranged between the refrigerating station water inlet and the inlet on the load side of the water-water heat exchanger; an electric control valve (i.e., a second two-way valve 37) is arranged on a pipeline (i.e., a chilled water inlet pipeline 31) between the outlet of the load side of the water-water heat exchanger and the inlet of the evaporator, and a connecting pipeline (i.e., a second chilled water outlet pipeline 33) and an electric control valve (i.e., a second two-way valve 37) are arranged between the outlet of the load side of the water-water heat exchanger and the outlet of the evaporator.
Preferably, the refrigeration pump 38 may be one or more in parallel, the evaporative cold heat sink may be one or more in parallel, the cooling pump 53 may be one or more in parallel, and the compression refrigeration unit 41 may be one or more in parallel.
An air outlet 22 is arranged on the box body 20 at a position corresponding to the air outlet of the evaporative cooling heat dissipation device and used for discharging hot air generated by the evaporative cooling heat dissipation device; the front and the back of the box body 20 are also provided with air inlets 23 corresponding to the air inlets of the evaporative cooling heat dissipation device, and the air inlets are used for the air inlet of the evaporative cooling heat dissipation device; the region of the box 20 where the evaporative cooling heat dissipation device is installed and the region where other devices are installed are provided with transverse partitions 21, and the partitions 21 are used for preventing the interference of the hot and humid air flow of the installation region where the evaporative cooling heat dissipation device is located on other devices.
The four corners of the top of the box body 20 are provided with hoisting structures 24, the bottom of the box body 20 is provided with a forklift carrying structure 25, and the box body 20 can be matched with a semitrailer for use, so that the refrigeration station subsystem 10 becomes a movable cold source without hoisting and quick response.
Main parts such as built-in cooling assembly 50 of integral type refrigeration station system, refrigeration subassembly 40, water pump, and adopt the distributing type to lean on the wall installation, can realize heat dissipation nearby, refrigeration nearby, the lift of cooling water pump (being cooling pump 53), frozen water pump (being freezing pump 38) is short, compares with traditional centralized cold water host computer design, has practiced thrift the water pump power consumption greatly, has realized energy-efficient operation.
The container (i.e. the box body 20) is internally provided with a power distribution device 80, the power distribution device 80 provides power and control for the compression refrigeration unit 41, the evaporative cooling heat dissipation device, the freezing pump 38, the cooling pump 53, the electric control valves and other electric devices, the power distribution device 80 is connected with the electric devices, and only a power supply needs to be provided for the single power distribution device 80 after the freezing station is in place on site. The distribution device 80 is also internally provided with a centralized control microcomputer and a variable frequency controller, and is used for acquiring data such as temperature, flow, pressure, outdoor temperature and humidity of the whole system and further calculating the cold quantity requirement required by the outside, so that the variable frequency controller is used for carrying out variable frequency control on the refrigerating pump 38, the cooling pump 53 and the evaporative cold heat dissipation device, and the power consumption is reduced to realize energy conservation.
The freezer subsystem 10 has 3 cooling modes: natural cooling mode, compressor cooling mode, hybrid cooling mode.
And (3) natural cooling mode: the compression refrigeration unit 41, the electric control valve on the chilled water inlet line 31 between the first end and the second end of the second refrigeration circuit 421, the electric control valve on the first cooling water inlet line 511 between the node where the first cooling water inlet line 511 and the second cooling water inlet line 513 are connected and the node where the first cooling water inlet line 511 and the second cooling water outlet line 514 are connected, and the electric control valve on the evaporative cooling heat sink, the refrigeration pump 38, the cooling pump 53, the electric control valve on the second chilled water outlet line 33, the electric control valve on the second refrigeration circuit 421, the electric control valve on the second cooling water inlet line 513, and the electric control valve on the third cooling water outlet line 515 are closed.
A compressor refrigeration mode: the evaporative cooling heat sink, the compression refrigeration unit 41, the refrigeration pump 38, the cooling pump 53, the electrical control valve on the chilled water inlet line 31 between the first end and the second end of the second refrigeration circuit 421, the electrical control valve on the first cooling water inlet line 511 and the electrical control valve on the first cooling water inlet line 511 between the node where the first cooling water inlet line 511 and the second cooling water inlet line 513 are connected and the node where the first cooling water inlet line 511 and the second cooling water outlet line 514 are connected are opened, and the electrical control valve on the second chilled water outlet line 33, the electrical control valve on the second refrigeration circuit 421, the electrical control valve on the second cooling water inlet line 513 and the electrical control valve on the third cooling water outlet line 515 are closed.
A mixed refrigeration mode: the electric control valve on the second chilled water outlet pipe 33, the electric control valve on the chilled water inlet pipe 31 between the first end and the second end of the second refrigeration circuit 421, the electric control valve on the first cooling water inlet pipe 511 between the node where the first cooling water inlet pipe 511 and the second cooling water inlet pipe 513 are connected and the electric control valve on the first cooling water inlet pipe 511 and the third cooling water outlet pipe 515 between the node where the first cooling water inlet pipe 511 and the second cooling water outlet pipe 514 are connected are closed, and the electric control valve on the compression refrigeration unit 41, the evaporative cooling heat sink, the refrigeration pump 38, the cooling pump 53, the electric control valve on the chilled water inlet pipe 31, the electric control valve on the second refrigeration circuit 421, the electric control valve on the second cooling water inlet pipe 513 and the electric control valve on the first cooling water inlet pipe 511 are opened.
Second example
Fig. 4 shows a schematic configuration of a second example of the freezer station system of the present invention.
The second example differs from the first example in that: the specific structure of the first valve assembly and the second valve assembly in the second example is different from that in the first example. In particular, in the first example, the first valve assembly comprises two first and two second two- way valves 35, 37 and the second valve assembly comprises two third and two fourth two- way valves 54, 56, whereas in the second example the first valve assembly comprises first and second three- way valves 34, 36 and the second valve assembly comprises third and fourth three- way valves 55, 57. When the switching device adopts two-way valves, the two-way valves are mutually independent, can be respectively adjusted and controlled, are easy to replace and are beneficial to smooth operation of the system; when the switching device adopts the three-way valve, the operation is simple, convenient and quick, and the system structure is simplified.
Specifically, the electric control valve on the first cooling water inlet line 511 and the electric control valve on the third cooling water outlet line 515 are replaced with a fourth three-way valve 57, the electric control valve on the second cooling water inlet line 513 and the electric control valve on the first cooling water inlet line 511 between the node where the electric control valve on the first cooling water inlet line 511 and the second cooling water inlet line 513 are connected and the node where the first cooling water inlet line 511 and the second cooling water outlet line 514 are connected are replaced with a third three-way valve 55, the electric control valve on the chilled water inlet line 31 and the electric control valve on the third cooling water outlet line 515 are replaced with a second three-way valve 36, the electric control valve on the second refrigeration circuit 421 and the electric control valve on the chilled water inlet line 31 between the first and second ends of the second refrigeration circuit 421 are replaced with a first three-way valve 34.
The structures of the other components in the second example are the same as those in the first example, and are not described here again.
Of course, in an alternative embodiment not shown in the drawings of the present invention, the first valve component and the second valve component can be provided as other devices or apparatuses capable of performing switching and controlling functions, for example, the first valve component includes two first two-way valves 35 and one second three-way valve 36, and the second valve component includes one third three-way valve 55 and two fourth two-way valves 56.
Preferably, the two-way valve may be an electrically controlled regulator valve.
Third example
Fig. 5 shows a schematic structural view of a third example of the freezer station system of the present invention, which differs from the first example in that:
(1) in the third example, the refrigeration station system has only one refrigeration mode (i.e., a compressor refrigeration mode), the refrigeration station system only includes the compression refrigeration unit 41, and does not have the natural cooling heat exchange unit 42, and further does not need to provide auxiliary components (such as the second chilled water outlet pipeline 33 and the third cooling water outlet pipeline 515) for realizing serial connection or parallel connection of the compression refrigeration unit 41 and the natural cooling heat exchange unit;
(2) in a third example, the first valve assembly and the second valve assembly are not provided.
Specifically, as shown in fig. 5, the refrigeration station subsystem 10 is mainly composed of a compression refrigeration unit 41, a refrigeration pump 38, a cooling pump 53, and an evaporative cooling heat sink (i.e., evaporative cooling heat sink 52), all of which are installed in a box 20 for easy transportation. The compression refrigeration unit 41 includes a compressor 413, a condenser 414, and an evaporator 412; wherein the condenser, the evaporative cooling heat dissipation device and the cooling pump 53 are sequentially connected on the cooling water circulation pipeline to form annular cooling water circulation; the chilled water inlet pipeline 31, the evaporator, the refrigerating pump 38 and the first chilled water outlet pipeline 32 are sequentially connected, and are connected with a water supply and return pipe of external chilled water through the chilled water inlet pipeline 31 and the first chilled water outlet pipeline 32 to form chilled water circulation.
Preferably, the freeze pump 38 may be one or more in parallel; the evaporative cold heat dissipation devices can be arranged in parallel; the cooling pump 53 may be one or more arranged in parallel; the compression refrigeration unit 41 may be one or more in parallel arrangement; the compressor 413 of the compression refrigeration unit 41 may be a scroll, screw, or centrifugal compressor.
An air outlet 22 is arranged at the position, corresponding to the air outlet of the evaporative cooling heat dissipation device, of the top of the box body 20 convenient for transportation and is used for discharging hot air generated by the evaporative cooling heat dissipation device; air inlets 23 are arranged at the front and the back of the box body 20 corresponding to the air inlets of the evaporative cooling heat dissipation device and are used for the air inlet of the evaporative cooling heat dissipation device; a transverse partition plate 21 is arranged between the area where the evaporative cooling heat dissipation device is installed in the box body 20 and the area where other equipment is installed, and the partition plate 21 is used for preventing the interference of the hot and humid air flow of the installation area where the evaporative cooling heat dissipation device is located on other equipment.
The refrigeration station subsystem 10 of the third example of the present invention has a simple structure, is easy to control, can refrigerate only chilled water by the compression refrigeration unit 41, and is suitable for regions with relatively high annual temperatures.
It should be noted that, in the third example of the present invention, the cooling assembly 50 is used for cooling the refrigerant medium in the compression refrigeration unit 41, so as to achieve the purpose that the cooling assembly 50 cools the refrigeration assembly 40.
Fourth example
Fig. 6 shows a schematic configuration diagram of a fourth example of the freezer station system of the present invention.
The fourth example is the same as the first example in that: in the fourth example, the evaporator 412 of the compression refrigeration unit 41 and the natural cooling heat exchange unit 42 may be arranged in series or in parallel, depending on the actual situation; in addition, the cooling module 50 may be used to cool the compression refrigeration unit 41 and/or the natural cooling heat exchange unit 42.
The fourth example differs from the first example in that: in the fourth example, the configurations of the compression refrigeration unit 41 and the natural cooling heat exchange unit are different from those of the first example, and the specific structure of the cooling unit 50 is also different from that of the first example, and therefore, the specific connection relationship and positional relationship between the above-described components are not exactly the same as those of the first example.
See in particular the following description:
as shown in fig. 6, in a fourth example of the present invention, the refrigeration assembly 40 includes a compression refrigeration unit 41, the compression refrigeration unit 41 is configured to refrigerate chilled water flowing through the chilled water circulation line 30, the compression refrigeration unit 41 includes a first refrigeration circuit 411, and an evaporator 412 and a compressor 413 which are sequentially disposed on the first refrigeration circuit 411, and the cooling assembly 50 includes a closed evaporative cooling heat exchanger configured to cool a refrigerant in the first refrigeration circuit 411.
Specifically, the chilled water circulation pipeline 30 passes through the compression refrigeration unit 41, the chilled water flowing into the chilled water circulation pipeline 30 is cooled under the heat absorption and evaporation action of the refrigeration medium in the compression refrigeration unit 41, and the refrigeration medium in the compression refrigeration unit 41 is used for refrigerating the chilled water; correspondingly, the temperature of the evaporated gaseous refrigerant in the compression refrigeration unit 41 is increased after being compressed by the compressor 413, and the refrigerant in the compression refrigeration unit 41 is condensed and radiated under the action of the cooling water in the closed evaporative cooling heat exchange device, so that the refrigerant can be used for refrigerating the chilled water again, and thus, the recycling of the refrigerant in the compression refrigeration unit 41 is realized.
Specifically, the first refrigeration circuit 411 is a self-circulation type pipeline, the first refrigeration circuit 411 performs heat exchange through a closed type evaporative cooling heat exchange device, a refrigeration medium is arranged in the first refrigeration circuit 411, the refrigeration medium sequentially passes through the evaporator 412, the compressor 413 and the closed type evaporative cooling heat exchange device in the first refrigeration circuit 411, and then flows to the evaporator 412 again, so that the circulation flow of the refrigeration medium in the first refrigeration circuit 411 is realized, and the refrigeration medium can repeatedly refrigerate the chilled water flowing through the chilled water circulation pipeline 30.
In the above arrangement, the chilled water circulation pipeline 30 and the first refrigeration circuit 411 both pass through the evaporator 412, a part of the first refrigeration circuit 411 passes through the closed type evaporation cooling heat exchange device, a refrigeration medium in the first refrigeration circuit 411 and chilled water in the chilled water circulation pipeline 30 perform heat exchange at the evaporator 412, a liquid refrigeration medium absorbs heat of the chilled water and evaporates into a gas state, so that the temperature of the chilled water is reduced, thereby refrigerating the chilled water is realized, the gas refrigeration medium is compressed by the compressor 413 and then becomes a high-temperature high-pressure gas refrigeration medium, the high-temperature high-pressure gas refrigeration medium is condensed into a liquid state at the closed type evaporation cooling heat exchange device, and the liquid refrigeration medium is used for refrigerating the chilled water again.
Through the process, the high-temperature refrigeration medium of the compression refrigeration unit 41 can be directly cooled in the evaporative cooling heat dissipation device 52, circulating cooling water is not needed, the temperature difference of a heat exchanger is reduced, the cooling effect is better, and the energy efficiency of the compression refrigeration unit is improved; meanwhile, a cooling pump is omitted, so that the power consumption of the system is reduced, and the running cost is reduced. The refrigeration station subsystem 10 can provide chilled water for the chilled water device 60 only through the refrigeration station subsystem without external connection of other devices and resources, so that smooth operation of the refrigeration station system is guaranteed; meanwhile, the independence and the integrity of the refrigeration station subsystem 10 are guaranteed, and the nearby and rapid deployment of the refrigeration station subsystem 10 can be realized.
As shown in fig. 6, in a fourth example of the present invention, the freezer station subsystem 10 includes only the first valve assembly, and the first valve assembly includes a first three-way valve 34 and a second three-way valve 36.
Of course, in an alternative embodiment of the invention, which is not shown in the drawings, the first valve assembly in the fourth example can also be arranged to comprise two first two-way valves 35 and two second two-way valves 37, according to practical needs.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects: the refrigeration station subsystem is convenient to transport and deploy rapidly compared with the prior art that the refrigeration assembly and the cooling assembly are arranged separately and located at different positions; in addition, as the chilled water circulation pipeline, the refrigerating assembly and the cooling assembly are all intensively arranged in the box body, the structure of the refrigerating station subsystem is compact, and the external space is saved; each freezing station subsystem is provided with an independent and complete freezing system and can independently provide chilled water for chilled water equipment; the refrigeration station subsystem is an independent integral structure, so that the refrigeration station subsystem is conveniently, quickly and easily connected with chilled water equipment, the refrigeration station subsystem can be installed and arranged at a proper installation position according to actual conditions and actual requirements, and the adaptability is high.
The application provides a high-efficient refrigeration station system that can deploy fast, this system has integrated cooling module, refrigeration subassembly isotructure, realize supplying fast through the integral type design, can be according to the refrigerated water equipment to the supply volume of refrigerated water subsystem to the adjustment with adaptability of demand volume of refrigerated water, can be according to actual conditions, simplify the deployment condition of cooling water pipe network system, refrigerated water pipe network system etc. of refrigeration station subsystem, simplify the inner structure of refrigeration station subsystem, with the real engineering productization that realizes of best granularity configuration. The distributed module arrangement of integral type refrigeration station system is suitable for near cooling outside the wall of computer lab, need not to carry out the big transformation to the building and can use at newly-built computer lab or transformation computer lab, can also realize the staging according to the computer lab construction progress and drop into, has simplified the project construction process greatly. The cooling pump and the refrigerating pump are small in lift, the refrigerating station subsystem is installed nearby outside the wall, heat is dissipated nearby, refrigeration is nearby, and the frequency conversion control technology of partial load is matched, so that efficient and energy-saving operation of the machine room is achieved.
Example 2
In accordance with an embodiment of the present invention, there is provided a method embodiment for a control method applied to a freezer station system, it being noted that the steps illustrated in the flowchart of the figure may be performed in a computer system such as a set of computer executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that presented herein.
Fig. 7 is a flowchart of a control method applied to a freezer station system according to an embodiment of the present invention, as shown in fig. 7, applied to the freezer station system in embodiment 1, and including the steps of:
step S702, acquiring detection parameters of a specified position in a refrigerating station system;
in step S702, the control method applied to the refrigeration station system according to the embodiment of the present application can be applied to the refrigeration station system according to embodiment 1, and by obtaining the detection parameter of the specified location in the refrigeration station system, the relevant device in the refrigeration station system is controlled according to the water temperature difference, the water pressure difference, or the water outlet temperature in the detection parameter, so that the real-time change according to the water temperature of the cooling water in the refrigeration station is adjusted, the refrigeration efficiency is improved, and the energy consumption of the machine room is further effectively reduced.
Step S704, determining a refrigeration mode according to the detection parameters;
in this embodiment, the determining the cooling mode according to the detection parameter in step S704 includes: collecting the water outlet temperature and the chilled water return temperature of the evaporative cooling heat dissipation device under the condition that the detection parameters comprise the water outlet temperature and the chilled water return temperature of the evaporative cooling heat dissipation device; and determining a refrigeration mode according to the comparison result of the outlet water temperature and the return water temperature of the chilled water with the threshold value.
Specifically, according to the comparison result between the outlet water temperature and the return chilled water temperature and the threshold, determining the refrigeration mode comprises:
when the outlet water temperature is less than or equal to the first temperature set value, determining that the refrigeration mode is a natural cooling mode;
when the first temperature set value is T3 and the outlet water temperature of the evaporative cooling heat sink is less than or equal to T3, the refrigeration station system directly enters a natural cooling mode without starting a compressor.
When the outlet water temperature is greater than the difference between the return water temperature of the chilled water and the second temperature set value, determining that the refrigeration mode is a compressor refrigeration mode;
and under the condition that the second temperature set value is T4, when the water outlet temperature of the evaporative cooling heat radiator is greater than the return water temperature of the chilled water to T4, the refrigerating station system enters a compressor refrigerating mode.
And when the outlet water temperature is greater than the first temperature set value and is less than or equal to the difference between the return water temperature of the chilled water and the second temperature set value, determining that the refrigeration mode is a mixed refrigeration mode.
And determining that the refrigerating station enters a mixed refrigeration mode under the condition that the water outlet temperature of the evaporative cooling heat dissipation device is more than T3 and less than or equal to the return water temperature of chilled water-T4.
Step S706, carrying out frequency conversion control on a designated device in the refrigerating station system according to the refrigerating mode of the refrigerating station system and the detection parameters of the designated position; wherein the cooling mode includes: a natural cooling mode, a compressor cooling mode, and a hybrid cooling mode.
In step S706, according to the refrigeration mode of the refrigeration station system and the detection parameter of the designated location, the present application performs frequency conversion control on the designated device according to the operation mode of each refrigeration mode, thereby reducing power consumption and achieving energy saving.
Optionally, under the condition that the refrigeration mode is the natural cooling mode, controlling the compression refrigeration unit, the electric regulating valve on the chilled water inlet pipeline between the first end and the second end of the second refrigeration loop, the electric regulating valve on the first cooling water inlet pipeline between the node where the first cooling water inlet pipeline and the second cooling water inlet pipeline are connected and the electric regulating valve on the first cooling water inlet pipeline between the node where the first cooling water inlet pipeline and the second cooling water outlet pipeline are connected to be closed, and opening the evaporative cooling heat dissipation device, the refrigeration pump, the cooling pump, the electric regulating valve on the second chilled water outlet pipeline, the electric regulating valve on the second refrigeration loop, the electric regulating valve on the second cooling water inlet pipeline and the electric regulating valve on the third cooling water outlet pipeline; under the condition that the refrigeration mode is a compressor refrigeration mode, controlling an evaporative cooling heat dissipation device, a compression refrigeration unit, a refrigeration pump, a cooling pump, an electric regulating valve on a chilled water inlet pipeline between a first end and a second end of a second refrigeration loop, an electric regulating valve on a first cooling water inlet pipeline between a node where the first cooling water inlet pipeline is connected with the second cooling water inlet pipeline and a node where the first cooling water inlet pipeline is connected with the second cooling water outlet pipeline, and an electric regulating valve on the first cooling water inlet pipeline to be opened, and closing the electric regulating valve on the second chilled water outlet pipeline, the electric regulating valve on the second refrigeration loop, the electric regulating valve on the second cooling water inlet pipeline and an electric regulating valve on a third cooling water outlet pipeline; and under the condition that the refrigeration mode is a mixed refrigeration mode, controlling an electric control valve on a second chilled water outlet pipeline, an electric control valve on a chilled water inlet pipeline between the first end and the second end of a second refrigeration loop, an electric control valve on a first cooling water inlet pipeline between a node where a first cooling water inlet pipeline and a second cooling water inlet pipeline are connected and a node where the first cooling water inlet pipeline and the second cooling water outlet pipeline are connected, and an electric control valve on a third cooling water outlet pipeline to be closed, and opening the electric control valves on the compression refrigeration unit, the evaporative cooling heat dissipation device, the refrigeration pump, the cooling pump, the chilled water inlet pipeline, the second refrigeration loop, the second cooling water inlet pipeline and the first cooling water inlet pipeline.
Optionally, performing frequency conversion control on a designated device in the freezer station system according to the refrigeration mode of the freezer station system and the detection parameter of the designated location includes: the detection parameters at the designated location further include: acquiring the temperature difference of the cooling water supply and return water under the condition that the temperature difference of the cooling water supply and return water exists; comparing the temperature difference of the cooling water supply and return water temperature with a first set value to obtain a comparison result; and according to the comparison result, carrying out variable frequency control on a designated device in the refrigerating station system, wherein the designated device comprises a cooling pump.
Further, optionally, performing variable frequency control on a designated device in the freezer station system according to the comparison result includes: controlling a cooling pump to keep the current rotating speed under the condition that the temperature difference of the cooling water supply return water temperature is equal to a first set value; controlling the rotating speed of the cooling pump to reach a first rotating speed under the condition that the temperature difference of the cooling water supply return water temperature is larger than a first set value; controlling the rotating speed of the cooling pump to reach a second rotating speed under the condition that the temperature difference of the cooling water supply return water temperature is smaller than a first set value; wherein the first rotational speed is greater than the second rotational speed.
Wherein, in the case that the specifying device includes the cooling pump 53, and the detection parameter of the specified position is the temperature difference existing between the cooling water supply and return water temperatures, in order to realize energy saving, the cooling pump 53 has the difference Δ T between the cooling water supply and return water temperatures according to the cooling water supply and return water temperaturesc(namely, there is a temperature difference between the cooling water supply and return water temperatures in the embodiment of the present application) and the setting value Δ Tcs(i.e., the first setting value in the embodiment of the present application) is compared to perform frequency conversion adjustment, specifically as follows:
when Δ Tc＝⊿TcsAt this time, the cooling pump 53 maintains the existing rotational speed;
when Δ Tc>⊿TcsThe cooling pump 53 is controlled according to the first control demandCalculating (PID 1, wherein PID, proportional integral differential control) the increasing rotation speed until the cooling pump 53 reaches the set maximum rotation speed Vs1 (i.e., the first rotation speed in the present embodiment);
when Δ Tc<⊿TcsThen, the cooling pump 53 is decelerated in accordance with the set second control demand (denoted as PID2) until the cooling pump 53 reaches the set minimum rotation speed Vs2 (i.e., the second rotation speed in the embodiment of the present application).
Note that the variable frequency control of the cooling pump 53 can be applied to the natural cooling mode, the compressor cooling mode, and the hybrid cooling mode, respectively.
Optionally, performing frequency conversion control on a designated device in the freezer station system according to the refrigeration mode of the freezer station system and the detection parameter of the designated location includes: the detection parameters at the designated location further include: acquiring the pressure difference of the supply water pressure and the return water pressure of the chilled water under the condition that the pressure difference of the supply water pressure and the return water pressure of the chilled water exists; comparing the pressure difference of the supply water pressure and the return water pressure of the chilled water with a second set value to obtain a comparison result; and carrying out variable frequency control on a designated device in the refrigerating station system according to the comparison result, wherein the designated device comprises a refrigerating pump.
Further, optionally, performing variable frequency control on a designated device in the freezer station system according to the comparison result includes: under the condition that the pressure difference of the chilled water supply and return water pressure is equal to a second set value, controlling the refrigerating pump to keep the current rotating speed; under the condition that the pressure difference of chilled water supply and return water pressure is smaller than a second set value, controlling the rotating speed of the refrigerating pump to reach a first rotating speed, wherein the first rotating speed is larger than the current rotating speed; under the condition that the pressure difference of the chilled water supply and return water pressure is greater than a second set value, controlling the rotating speed of the refrigerating pump to reach a second rotating speed, wherein the second rotating speed is less than the current rotating speed; wherein the first rotational speed is greater than the second rotational speed.
Wherein, in the case that the specifying device includes the refrigeration pump 38 and the detection parameter at the specified position is that there is a pressure difference between the chilled water supply and return water pressure, in order to realize energy saving, there is a pressure difference Δ P between the refrigeration pump 38 and the chilled water supply and return water pressuree(that is, the chilled water supply and return water in the embodiment of the present applicationDifferential pressure exists) and a setting value delta Pes(i.e., the second setting value in the embodiment of the present application) is compared to perform frequency conversion adjustment, specifically as follows:
when delta Pe＝⊿PesAt this time, the freeze pump 38 maintains the existing rotational speed;
when delta Pe<⊿PesThen, the rotational speed of the refrigerant pump 38 is increased according to a set third control demand (denoted as PID3) until the refrigerant pump 38 reaches a set maximum rotational speed Vs3 (i.e., the first rotational speed in the embodiment of the present application);
when delta Pe>⊿PesThen, the refrigeration pump 38 is slowed in accordance with the set fourth control demand (denoted PID4) until the refrigeration pump 38 reaches the set minimum speed Vs4 (i.e., the second speed in the embodiment of the present application).
Note that the variable frequency control of the refrigerating pump 38 can be applied to the natural cooling mode, the compressor cooling mode, and the hybrid cooling mode, respectively.
Optionally, performing frequency conversion control on a designated device in the freezer station system according to the refrigeration mode of the freezer station system and the detection parameter of the designated location includes: the detection parameter of the designated position is the outlet water temperature of the cooled evaporative cooling heat dissipation device; comparing the outlet water temperature of the cooled evaporative cooling heat dissipation device, the preset cooling value and the local wet bulb temperature to obtain a comparison result; and carrying out variable frequency control on a designated device in the refrigerating station system according to the comparison result, wherein the designated device comprises an evaporative cooling heat dissipation device.
Optionally, when the set value of the outlet water temperature is greater than or equal to the sum of the local wet bulb temperature and the preset cooling value, performing frequency conversion control on a designated device in the refrigeration station system according to the comparison result includes: when the outlet water temperature of the cooled evaporative cooling heat dissipation device is less than the sum of the local wet bulb temperature and the preset cooling value, controlling the rotation speed of the evaporative cooling heat dissipation device to be reduced to a second rotation speed; when the water outlet temperature of the cooled evaporative cooling heat dissipation device is greater than the sum of the local wet bulb temperature and the preset cooling value and the water outlet temperature of the cooled evaporative cooling heat dissipation device is less than the set water outlet temperature value, controlling the rotation speed of the evaporative cooling heat dissipation device to be reduced to a second rotation speed; and when the water outlet temperature of the cooled evaporative cooling heat dissipation device is greater than or equal to the water outlet temperature set value, controlling the rotation speed of the evaporative cooling heat dissipation device to be increased to a first rotation speed.
Optionally, when the set value of the outlet water temperature is less than or equal to the sum of the local wet bulb temperature and the preset cooling value, performing frequency conversion control on a designated device in the refrigeration station system according to the comparison result includes: when the temperature of the cooled outlet water of the evaporative cooling heat dissipation device is greater than or equal to the sum of the local wet bulb temperature and a preset cooling value, controlling the rotation speed of the evaporative cooling heat dissipation device to be increased to a first rotation speed; when the outlet water temperature of the cooled evaporative cooling heat dissipation device is less than the sum of the local wet bulb temperature and the preset cooling value and the outlet water temperature of the cooled evaporative cooling heat dissipation device is greater than the outlet water temperature set value, controlling the rotation speed of the evaporative cooling heat dissipation device to be reduced to a second rotation speed; and when the outlet water temperature of the cooled evaporative cooling heat dissipation device is lower than the outlet water temperature set value, controlling the rotation speed of the evaporative cooling heat dissipation device to be reduced to a second rotation speed.
Wherein, under the condition that the designated device comprises the evaporative cold heat dissipation device 52 and the detection parameter of the designated position is the outlet water temperature of the cooled evaporative cold heat dissipation device 52, in order to realize energy saving, the outlet water temperature T of the cooled evaporative cold heat dissipation device 52 is usedcoA preset cooling value T1And local wet bulb temperature Twb(the temperature reached when a piece of air is humidified and saturated (relative humidity reaches 100%) is compared, and the comparison result is subjected to PID adjustment, specifically as follows:
when there is a demand for cooling, the target outlet water temperature of the evaporative cold heat sink 52 is the sum of the local wet bulb temperature and the preset cooling value, which is denoted as Twb+T1；
In a possible winter environment or a severe cold environment, the outlet water temperature of the cooled evaporative cooling heat dissipation device needs to be compared with a set outlet water temperature value so as to achieve the purpose of preventing the equipment from freezing.
In the above-described scenario, the set outlet water temperature value will be based onThe method comprises the following steps in different refrigeration modes: a first outlet water temperature set value and a second outlet water temperature set value; the first water outlet temperature set value is greater than the second water outlet temperature set value; wherein the outlet water temperature is recorded as TcolThe first set value of the water outlet temperature is recorded as Tcol1The second set value of the water outlet temperature is recorded as Tcol2；
At Tcol≥Twb+T1In the case of (2):
case 1, when Tcol＞Twb+T1＞TcoMeanwhile, the evaporative cold heat sink 52 is slowed down according to a set sixth control demand (denoted PID6) until the minimum rotational speed Vs6 of the device (i.e., the second rotational speed in the embodiment of the present application); that is, when the temperature of the outlet water is too low, the ice is prevented, and the rotation speed of the evaporative cooling heat dissipation device 52 is reduced;
case 2, when Tcol＞Tco＞Twb+T1Meanwhile, the evaporative cold heat sink 52 is slowed down according to a set sixth control demand (denoted PID6) until the minimum rotational speed Vs6 of the device (i.e., the second rotational speed in the embodiment of the present application); that is, unlike case 1, the rotational speed of the evaporative cold heat sink 52 is reduced for preventing icing based on the degree of icing achieved at different temperatures;
case 3, when Tco≥Tcol＞Twb+T1Meanwhile, the evaporative cold heat sink 52 increases the rotational speed according to a set fifth control demand (denoted as PID5) up to the maximum rotational speed Vs5 of the device (i.e., the first rotational speed in the embodiment of the present application); that is, the outlet water temperature is higher than the outlet water temperature set value, which indicates that the rotation speed of the evaporative cold heat dissipation device 52 needs to be increased to achieve the purpose of cooling;
at Tcol≤Twb+T1In the case of (2):
case 1, when Tco≥Twb+T1＞TcolMeanwhile, the evaporative cold heat sink 52 increases the rotational speed according to a set fifth control demand (denoted as PID5) up to the maximum rotational speed Vs5 of the device (i.e., the first rotational speed in the embodiment of the present application); that is, the temperature of the outlet water is higher than the set value of the outlet water temperature, which indicates that the evaporation cooling power needs to be increasedThe rotational speed of the thermal device 52, such that cooling is achieved;
case 2, Twb+T1＞Tco＞TcolMeanwhile, the evaporative cold heat sink 52 is slowed down according to a set sixth control demand (denoted PID6) until the minimum rotational speed Vs6 of the device (i.e., the second rotational speed in the embodiment of the present application); that is, unlike case 1, the rotational speed of the evaporative cold heat sink 52 is reduced for preventing icing based on the degree of icing achieved at different temperatures;
case 3, Twb+T1＞Tcol＞TcoMeanwhile, the evaporative cold heat sink 52 is slowed down according to a set sixth control demand (denoted PID6) until the minimum rotational speed Vs6 of the device (i.e., the second rotational speed in the embodiment of the present application); that is, when the outlet water temperature is too low, the freezing is prevented and the rotational speed of the evaporative cooling heat sink 52 is reduced.
In the embodiment of the invention, the refrigeration station is adopted to realize nearby heat dissipation through nearby installation, and a nearby refrigeration mode is adopted to obtain the detection parameters of a specified position in the refrigeration station system; determining a refrigeration mode according to the detection parameters; carrying out frequency conversion control on a designated device in the refrigerating station system according to the refrigerating mode of the refrigerating station system and the detection parameters of the designated position; wherein the cooling mode includes: the system comprises a main machine, a cooling water system and a cooling water pump, wherein the main machine comprises a main machine body, a main machine body and a cooling water system, the main machine body is connected with the main machine body, the cooling water system is connected with the main machine body, the main machine body is connected with the cooling water system, and the cooling water system is connected with the main machine body.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (23)
1. A freezer station system, characterized in that the freezer station system comprises a freezer station subsystem (10), the freezer station subsystem (10) comprising:
a case (20);
the cooling water circulation assembly comprises a chilled water circulation pipeline (30) and a refrigerating pump (38) arranged on the chilled water circulation pipeline (30);
the refrigeration assembly (40) is used for refrigerating the chilled water in the chilled water circulation pipeline (30), the refrigeration assembly (40) comprises a compression refrigeration unit (41), and the compression refrigeration unit (41) comprises a first refrigeration loop (411), and an evaporator (412) and a compressor (413) which are sequentially arranged on the first refrigeration loop (411);
a cooling assembly (50) comprising an evaporative cooling heat sink (52) for cooling the refrigerant medium in the first refrigeration circuit (411), wherein at least part of the cooling water flow through assembly, the compressor-refrigerator group (41) and the evaporative cooling heat sink (52) are located inside the cabinet (20) to form a modular structure.
2. The cold station system of claim 1, wherein the cold station subsystem (10) further comprises a partition (21) located within the cabinet (20), the partition (21) dividing the interior of the cabinet (20) into a first cavity (26) and a second cavity (27), at least a portion of the cooling water flow-through assembly, the evaporator (412), the compressor (413), and at least a portion of the length of the first refrigeration circuit (411) being located within the first cavity (26), the evaporative cold heat sink (52) being located within the second cavity (27).
3. The cold station system of claim 1, wherein the evaporative cooling heat sink (52) is an open evaporative cooling heat exchanger or a closed evaporative cooling heat exchanger.
4. The freezer station system of claim 3,
when the evaporative cooling heat sink (52) is an open evaporative cooling heat sink, the compression refrigeration unit (41) further comprises a condenser (414) arranged on the first refrigeration loop (411), the cooling assembly (50) further comprises a cooling water circulation pipeline arranged between the condenser (414) and the evaporative cooling heat sink (52) and a cooling pump (53) arranged on the cooling water circulation pipeline, and the cooling pump (53) is arranged in the first cavity (26) of the box body (20).
5. The cold station system of claim 4, wherein the refrigeration assembly (40) further comprises a free cooling heat transfer unit (42) disposed in parallel or in series with the evaporator (412).
6. The cold station system of claim 5, wherein the cold station subsystem (10) further comprises a first valve assembly disposed on the chilled water flow line (30), wherein the evaporator (412) is connected in series or in parallel with the free cooling heat exchange unit (42) by opening and closing the first valve assembly.
7. The freezer station system of claim 5,
the cooling assembly (50) further comprises a cooling water circulation pipeline and a cooling pump (53) arranged on the cooling water circulation pipeline, the refrigerating station subsystem (10) further comprises a second valve assembly arranged on the cooling water circulation pipeline, and the second valve assembly is opened and closed to be connected with a condenser (414) in the compression refrigerating unit (41) and/or the natural cold heat exchange unit (42) and the cooling assembly (50) to realize cooling.
8. The freezer station system of claim 3,
when the evaporative cooling heat dissipation device (52) is a closed evaporative cooling heat exchange device, an evaporative condenser (521) for cooling the first refrigeration loop (411) is arranged in the closed evaporative cooling heat exchange device.
9. The cold station system according to claim 3, wherein the cooling assembly (40) further comprises a free cooling heat exchange unit (42) connected in parallel or in series with the evaporator (412), wherein when the evaporative cooling heat sink (52) is a closed evaporative cooling heat exchanger, the free cooling heat exchange unit (42) comprises a second cooling circuit (421), and a first free cooling heat exchanger (522) for free cooling the second cooling circuit (421) is arranged in the closed evaporative cooling heat exchanger.
10. The freezer station system of any one of claims 1-9, further comprising a power distribution device (80) disposed within the first cavity (26) of the cabinet (20), the refrigeration assembly (40) and the cooling assembly (50) each being electrically connected to the power distribution device (80).
11. The freezer station system of any one of claims 1-9, wherein the cabinet (20) is provided with an air outlet (22) at a location corresponding to an air outlet of the evaporative cooling heat sink (52), and wherein the cabinet (20) is provided with an air inlet (23) at a location corresponding to an air inlet of the evaporative cooling heat sink (52).
12. The freezer station system of any one of claims 1-9, wherein the freezer station system comprises a plurality of the freezer station subsystems (10) arranged in spaced apart relation.
13. A control method applied to a freezer station system, characterized in that, applied to the freezer station system of any one of claims 1-12, the method comprises:
acquiring detection parameters of a specified position in the refrigerating station system;
determining a refrigeration mode according to the detection parameters;
carrying out frequency conversion control on a designated device in the refrigerating station system according to the refrigerating mode of the refrigerating station system and the detection parameters of the designated position;
wherein the cooling mode includes: a natural cooling mode, a compressor cooling mode, and a hybrid cooling mode.
14. The method of claim 13, wherein determining a cooling mode based on the sensed parameter comprises:
under the condition that the detection parameters comprise the water outlet temperature and the chilled water return temperature of the evaporative cooling heat dissipation device (52), collecting the water outlet temperature and the chilled water return temperature of the evaporative cooling heat dissipation device (52);
and determining the refrigeration mode according to the comparison result of the outlet water temperature and the return water temperature of the chilled water with the threshold value.
15. The method of claim 14, wherein determining the cooling mode based on the comparison of the leaving water temperature and the returning chilled water temperature to thresholds comprises:
when the outlet water temperature is less than or equal to a first temperature set value, determining that the refrigeration mode is the natural cooling mode;
when the outlet water temperature is greater than the difference between the return chilled water temperature and a second temperature set value, determining that the refrigeration mode is the compressor refrigeration mode;
and when the outlet water temperature is greater than the first temperature set value and less than or equal to the difference between the return water temperature of the chilled water and the second temperature set value, determining that the refrigeration mode is the mixed refrigeration mode.
16. The method of claim 15,
under the condition that the refrigeration mode is the natural cooling mode, controlling a compression refrigeration unit (41), an electric regulating valve on a chilled water inlet pipeline (31), an electric regulating valve on the chilled water inlet pipeline (31) between a first end and a second end of a second refrigeration loop (421), an electric regulating valve on a first cooling water inlet pipeline (511) and a second cooling water inlet pipeline (513) connected with a node between the first cooling water inlet pipeline (511) and a node between the second cooling water outlet pipeline (514) and the node between the first cooling water inlet pipeline (511) and the second cooling water outlet pipeline (514), closing an electric regulating valve on the first cooling water inlet pipeline (511), and closing an evaporative cooling heat sink, a refrigeration pump (38), a cooling pump (53), an electric regulating valve on the second chilled water outlet pipeline (33), an electric regulating valve on the second refrigeration loop (421), An electric regulating valve on the second cooling water inlet pipeline (513) and an electric regulating valve on the third cooling water outlet pipeline (515) are opened;
under the condition that the refrigeration mode is the compressor refrigeration mode, controlling an evaporative cooling heat sink, a compression refrigeration unit (41), a refrigeration pump (38), a cooling pump (53), an electric regulating valve on a chilled water inlet pipeline (31), an electric regulating valve on the chilled water inlet pipeline (31) between the first end and the second end of a second refrigeration loop (421), an electric regulating valve on a first cooling water inlet pipeline (511) and an electric regulating valve on the first cooling water inlet pipeline (511) between a node where the first cooling water inlet pipeline (511) and the second cooling water inlet pipeline (513) are connected and a node where the first cooling water inlet pipeline (511) and the second cooling water outlet pipeline (514) are connected, and opening the electric regulating valve on the second chilled water outlet pipeline (33), the electric regulating valve on the second refrigeration loop (421), An electric control valve on the second cooling water inlet pipeline (513) and an electric control valve on the third cooling water outlet pipeline (515) are closed;
under the condition that the refrigeration mode is the mixed refrigeration mode, an electric regulating valve on a second chilled water outlet pipeline (33), an electric regulating valve on a chilled water inlet pipeline (31) between the first end and the second end of a second refrigeration loop (421), an electric regulating valve on a first cooling water inlet pipeline (511) between a node where the first cooling water inlet pipeline (511) is connected with the second cooling water inlet pipeline (513) and a node where the first cooling water inlet pipeline (511) is connected with the second cooling water outlet pipeline (514), and an electric regulating valve on a third cooling water outlet pipeline (515) are controlled to be closed, and a compression refrigeration unit (41), an evaporative cooling heat dissipation device, a freezing pump (38), a cooling pump (53), an electric regulating valve on the chilled water inlet pipeline (31), an electric regulating valve on the second refrigeration loop (421) are controlled to be closed, The electric control valve on the second cooling water inlet line (513) and the electric control valve on the first cooling water inlet line (511) are opened.
17. The method of claim 16, wherein performing variable frequency control of a designated device in the freezer station system based on the refrigeration mode of the freezer station system and the sensed parameters of the designated location comprises:
the detecting parameters at the designated location further include: under the condition that the temperature difference exists between the cooling water supply temperature and the cooling water return temperature, acquiring the temperature difference existing between the cooling water supply temperature and the cooling water return temperature;
comparing the temperature difference of the cooling water supply and return water temperature with a first set value to obtain a comparison result;
and according to the comparison result, performing variable frequency control on the specified device in the refrigerating station system, wherein the specified device comprises a cooling pump (53).
18. The method of claim 17, wherein performing variable frequency control of the designated device in the freezer station system based on the comparison comprises:
under the condition that the temperature difference of the cooling water supply return water temperature is equal to the first set value, controlling the cooling pump (53) to keep the current rotating speed;
under the condition that the temperature difference of the cooling water supply return water temperature is larger than the first set value, controlling the rotating speed of the cooling pump (53) to reach a first rotating speed;
under the condition that the temperature difference of the cooling water supply return water temperature is smaller than the first set value, controlling the rotating speed of the cooling pump (53) to reach a second rotating speed;
wherein the first rotational speed is greater than the second rotational speed.
19. The method of claim 16, wherein performing variable frequency control of a designated device in the freezer station system based on the refrigeration mode of the freezer station system and the sensed parameters of the designated location comprises:
the detecting parameters at the designated location further include: under the condition that the supply and return water pressure of chilled water has differential pressure, acquiring the differential pressure of the supply and return water pressure of the chilled water;
comparing the pressure difference of the supply water pressure and the return water pressure of the chilled water with a second set value to obtain a comparison result;
and carrying out variable frequency control on the specified device in the refrigerating station system according to the comparison result, wherein the specified device comprises a refrigerating pump (38).
20. The method of claim 19, wherein performing variable frequency control of the designated device in the freezer station system based on the comparison comprises:
under the condition that the pressure difference of the chilled water supply and return water pressure is equal to the second set value, controlling the refrigerating pump (38) to keep the current rotating speed;
under the condition that the pressure difference of the chilled water supply and return water pressure is smaller than the second set value, controlling the rotating speed of the freezing pump (38) to reach a first rotating speed, wherein the first rotating speed is larger than the current rotating speed;
under the condition that the pressure difference of the chilled water supply and return water pressure is greater than the second set value, controlling the rotating speed of the freezing pump (38) to reach a second rotating speed, wherein the second rotating speed is less than the current rotating speed;
wherein the first rotational speed is greater than the second rotational speed.
21. The method of claim 16, wherein performing variable frequency control of a designated device in the freezer station system based on the refrigeration mode of the freezer station system and the sensed parameters of the designated location comprises:
the detection parameter of the designated position is the cooled water outlet temperature of the evaporative cooling heat dissipation device (52);
comparing the cooled water outlet temperature of the evaporative cooling heat dissipation device (52), a preset cooling value and the local wet bulb temperature to obtain a comparison result;
and carrying out variable frequency control on the appointed device in the refrigerating station system according to the comparison result, wherein the appointed device comprises the evaporative cooling heat dissipation device (52).
22. The method of claim 21, wherein performing variable frequency control of the designated device in the freezer station system based on the comparison if the leaving water temperature set point is greater than or equal to the sum of the local wet bulb temperature and a predetermined drop temperature value comprises:
when the outlet water temperature of the cooled evaporative cooling heat dissipation device (52) is less than the sum of the local wet bulb temperature and a preset cooling value, controlling the rotation speed of the evaporative cooling heat dissipation device (52) to be reduced to a second rotation speed;
when the water outlet temperature of the cooled evaporative cooling heat dissipation device (52) is greater than the sum of the local wet bulb temperature and a preset cooling value, and the water outlet temperature of the cooled evaporative cooling heat dissipation device (52) is less than the set water outlet temperature value, controlling the rotation speed of the evaporative cooling heat dissipation device (52) to be reduced to a second rotation speed;
and when the water outlet temperature of the cooled evaporative cooling heat dissipation device (52) is greater than or equal to the water outlet temperature set value, controlling the rotation speed of the evaporative cooling heat dissipation device (52) to be increased to a first rotation speed.
23. The method of claim 21, wherein performing variable frequency control of the designated device in the freezer station system based on the comparison if the leaving water temperature set point is less than or equal to the sum of the local wet bulb temperature and a predetermined drop temperature value comprises:
when the water outlet temperature of the cooled evaporative cooling heat dissipation device (52) is greater than or equal to the sum of the local wet bulb temperature and a preset cooling value, controlling the rotation speed of the evaporative cooling heat dissipation device (52) to be increased to a first rotation speed;
when the outlet water temperature of the cooled evaporative cooling heat dissipation device (52) is less than the sum of the local wet bulb temperature and a preset cooling value, and the outlet water temperature of the cooled evaporative cooling heat dissipation device (52) is greater than a set outlet water temperature value, controlling the rotation speed of the evaporative cooling heat dissipation device (52) to be reduced to a second rotation speed;
and when the water outlet temperature of the cooled evaporative cooling heat dissipation device (52) is lower than the set water outlet temperature value, controlling the rotation speed of the evaporative cooling heat dissipation device (52) to be reduced to a second rotation speed.
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| CN202011066223.XA CN114340299A (en) | 2020-09-30 | 2020-09-30 | Refrigeration station system and control method |
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| CN202011066223.XA CN114340299A (en) | 2020-09-30 | 2020-09-30 | Refrigeration station system and control method |
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