CN213931245U

CN213931245U - Double-cold-source chilled water storage air conditioning system

Info

Publication number: CN213931245U
Application number: CN202022436611.4U
Authority: CN
Inventors: 沈锡骞; 沈士圣
Original assignee: Ccdi Beijing International Building Design Consulting Co ltd
Current assignee: Ccdi Beijing International Building Design Consulting Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-08-10
Anticipated expiration: 2030-10-28

Abstract

The application discloses two cold sources water cold-storage air conditioning system relates to two cold sources air conditioning technical field for solve the problem of water cold-storage air conditioning system function singleness. The refrigeration assembly comprises a refrigeration circulating pipeline, a water chilling unit and a first control valve assembly; the cold accumulation assembly comprises a cold accumulation circulating pipeline, a second control valve assembly and a cold accumulation device; the cold supply assembly comprises two cold supply circulating pipelines, two heat exchangers, at least two cold supply devices and a third control valve assembly, a first heat exchange flow channel in each heat exchanger is connected in series with the cold accumulation circulating pipeline, a second heat exchange flow channel in each heat exchanger is connected in series with the cold supply circulating pipeline, and the third control valve assembly controls the first heat exchange flow channel in each heat exchanger to be communicated or disconnected with the cold supply circulating pipeline; the first control valve assembly controls the connection or disconnection of the refrigeration circulating pipeline and the cold supply circulating pipeline; the second control valve component controls the cold accumulation circulating pipeline to be communicated or disconnected with the refrigeration circulating pipeline and the cold accumulation circulating pipeline to be communicated or disconnected with the second heat exchange flow channels in the two heat exchangers.

Description

Double-cold-source chilled water storage air conditioning system

Technical Field

The application relates to the technical field of double-cold-source air conditioners, in particular to a double-cold-source water cold accumulation air conditioning system.

Background

The water cold storage air conditioner is an energy-saving operation mode which utilizes the peak-valley electricity price difference of a power grid, adopts a water chilling unit to cool in a water tank at night, and adopts a water chilling unit to cool in the water tank in the daytime and a water chilling unit to operate in a peak avoiding mode. The water cold accumulation air-conditioning system has the advantages of balancing the load of a power grid, reducing the operating cost of the air conditioner, being simple in system, low in initial investment (relative to ice cold accumulation) and the like. However, the chilled water storage air conditioning system has a single function and cannot simultaneously meet different cooling requirements.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a double-cold-source chilled water storage air conditioning system, which is used for solving the problem of single function of the chilled water storage air conditioning system in the prior art.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

the embodiment of the application provides a two cold sources water cold-storage air conditioning system includes: the refrigeration assembly comprises a refrigeration circulating pipeline, and a water chilling unit and a first control valve assembly which are both arranged on the refrigeration circulating pipeline; the cold accumulation assembly comprises a cold accumulation circulating pipeline, and a second control valve assembly and a cold accumulation device which are both arranged on the cold accumulation circulating pipeline, the cold accumulation circulating pipeline is communicated with the refrigeration circulating pipeline, and the second control valve assembly is used for controlling the cold accumulation circulating pipeline to be communicated or disconnected with the refrigeration circulating pipeline; the cold supply assembly comprises two cold supply circulating pipelines, two heat exchangers, at least two cold supply devices and a third control valve assembly arranged on the two cold supply circulating pipelines, the two cold supply circulating pipelines are communicated with the refrigeration circulating pipeline, a first heat exchange runner in each heat exchanger is connected in series on the cold storage circulating pipeline, a second heat exchange runner in each heat exchanger is connected in series on the cold supply circulating pipeline, the two heat exchangers and the two cold supply circulating pipelines respectively correspond to each other, and the second heat exchange flow channels of the two heat exchangers are mutually connected in series on the cold accumulation circulating pipeline, the two cold supply devices are respectively arranged on the two cold supply circulating pipelines, the third control valve assembly is used for controlling the first heat exchange flow channel in the two heat exchangers to be communicated or disconnected with the corresponding cooling circulation pipeline; the first control valve assembly is used for controlling the refrigeration circulating pipeline to be communicated with or disconnected from the two paths of cooling circulating pipelines, and the refrigeration circulating pipeline is connected with a first heat exchange flow channel of the heat exchanger in parallel; and the second control valve assembly is also used for controlling the cold accumulation circulating pipeline to be communicated with or disconnected from the second heat exchange flow channel in the two heat exchangers.

In some possible embodiments of the present application, the cold storage circulation duct includes: a main cold storage circulation pipeline; the two first bypass pipelines are respectively connected with the second heat exchange flow channels of the two heat exchangers in parallel; the cold accumulation assembly further comprises two regulating valves, and the two regulating valves are respectively installed on the two first bypass pipelines.

In some possible embodiments of this application, install temperature-detecting device in the heat exchanger, temperature-detecting device is arranged in detecting the leaving water temperature of second heat transfer runner in the heat exchanger, still includes the controller, the controller with temperature-detecting device governing valve electricity is connected, and is used for the basis the temperature value that temperature-detecting device detected adjusts the aperture of governing valve.

In some possible embodiments of the present application, the refrigeration assembly further includes a fourth control valve assembly, and the fourth control valve assembly is installed on the refrigeration cycle pipeline and is used for controlling the plurality of sets of water chilling units to be connected in series or in parallel and the plurality of sets of water chilling units to be connected or disconnected with each other.

In some possible embodiments of the present application, the refrigeration cycle pipeline includes a plurality of main refrigeration pipelines and a plurality of second bypass pipelines, each main refrigeration pipeline is provided with at least one water chilling unit, and each second bypass pipeline is connected between two main refrigeration pipelines; the main refrigeration pipeline include with the refrigeration inlet channel of the water inlet intercommunication of cooling water set and with the refrigeration return water pipe of the delivery port intercommunication of cooling water set, fourth control valve subassembly includes a plurality of refrigeration control valves and a plurality of bypass control valve, every with the refrigeration inlet channel or the refrigeration return water pipe of second by pass line intercommunication are connected with one refrigeration control valve, every install one on the second by pass line bypass control valve, the second by pass line is located all the way the side of intaking and another of the first refrigeration control valve on the refrigeration return water pipe in the main refrigeration inlet channel between the play water side of the first refrigeration control valve on the refrigeration inlet channel in the main refrigeration inlet channel.

In some possible embodiments of the present application, the cooling system further comprises a plurality of water pumps, and the plurality of water pumps are respectively installed on the cold storage circulation pipeline and the two cold supply circulation pipelines.

In some possible embodiments of the present application, the water pump further includes a plurality of check valves, the check valves are installed on the water outlet side of the water pump, and the check valves correspond to the water pumps one by one.

In some possible embodiments of the present application, the first refrigeration control valve and the second refrigeration control valve are both electric switching valves.

In some possible embodiments of the present application, the regulating valve is an electric regulating valve.

In some possible embodiments of the present application, the chiller is a water-cooled chiller.

In the practical application process of the dual-cold-source water cold-storage air-conditioning system in the embodiment of the application, when the night cold-storage mode is operated, the first control valve assembly controls the refrigeration circulating pipeline to be disconnected from the two cold-supply circulating pipelines, the second control valve assembly controls the cold-storage circulating pipeline to be communicated with the refrigeration circulating pipeline and controls the cold-storage circulating pipeline to be disconnected from the second heat exchange channels in the two heat exchangers, the third control valve assembly controls the first heat exchange channels in the two heat exchangers to be disconnected from the corresponding cold-supply circulating pipelines, the water chilling unit in the refrigeration assembly operates, and after circulating water in the cold-storage pipeline enters the refrigeration circulating pipeline and exchanges heat with the water chilling unit, the water temperature is reduced and then returns to the cold-storage device, so that the cold-storage function of the cold-storage device is realized; when the cold machine is operated in a cold supply mode, the first control valve assembly controls the refrigeration circulating pipeline to be communicated with the two cold supply circulating pipelines, the second control valve assembly controls the cold accumulation circulating pipeline to be disconnected with the refrigeration circulating pipeline and controls the cold accumulation circulating pipeline to be disconnected with the second heat exchange flow channels of the two heat exchangers, the third control valve assembly controls the first heat exchange flow channels of the two heat exchangers to be disconnected with the corresponding cold supply circulating pipelines, a cold water unit in the refrigeration assembly operates, and circulating water in the cold supply device enters the refrigeration circulating pipeline and exchanges heat with the cold water unit, the temperature is reduced, and the circulating water returns to the cold supply device, so that the cold supply function of the cold machine is realized; when the cold supply mode of the cold accumulation device is operated, the first control valve component controls the refrigeration circulating pipeline to be disconnected with the two cold supply circulating pipelines, the second control valve component controls the cold accumulation circulating pipeline to be disconnected with the refrigeration circulating pipeline and controls the cold accumulation circulating pipeline to be communicated with the second heat exchange channels of the two heat exchangers, the third control valve component controls the first heat exchange channels of the two heat exchangers to be communicated with the corresponding cold supply circulating pipeline, circulating water in the two cold supply devices respectively enters the first heat exchange channels of the corresponding heat exchangers, cold water flowing out of the cold accumulation device sequentially enters the second heat exchange channels of the two heat exchangers and exchanges heat with the circulating water in the first heat exchange channels, the temperature of the circulating water led out from the first heat exchange channels of the two heat exchangers is reduced, the heat exchanger which exchanges heat with cold water of the cold accumulation device firstly is the first heat exchanger, and the heat exchanger which exchanges heat with the cold water of the cold accumulation device later is the second heat exchanger, the water outlet temperature of a first heat exchange flow channel in the first heat exchanger is lower than that of a first heat exchange flow channel of the second heat exchanger, and the cold accumulation device can meet different cold supply temperature requirements of two cold supply devices at the same time; when the combined cooling mode is operated, the first control valve component controls the refrigeration circulating pipeline to be communicated with the two paths of cooling circulating pipelines, the second control valve component controls the cold accumulation circulating pipeline to be disconnected with the refrigeration circulating pipeline and controls the cold accumulation circulating pipeline to be communicated with the second heat exchange flow channels of the two heat exchangers, the third control valve component controls the first heat exchange flow channels of the two heat exchangers to be communicated with the corresponding cooling circulating pipelines, after partial circulating water in the two cooling devices enters the refrigeration circulating pipeline and exchanges heat with the water chilling unit, the temperature is reduced and then returns to the cooling circulating pipeline, the rest circulating water in the two cooling devices respectively enters the first heat exchange flow channels of the corresponding heat exchangers, cold water flowing out of the cold accumulation device sequentially enters the second heat exchange flow channels of the two heat exchangers and exchanges heat with the circulating water in the first heat exchange flow channels, and the temperature is reduced, then returns to the cold supply circulating pipeline to be converged with the other part of circulating water and then returns to the cold supply device, thereby realizing the combined cold supply of the water chilling unit and the cold accumulation device; when the cold storage and supply mode is operated, the first control valve component controls the refrigeration circulating pipeline to be disconnected from the two cold supply circulating pipelines, the second control valve component controls the cold storage circulating pipeline to be communicated with the refrigeration circulating pipeline and controls the cold storage circulating pipeline to be communicated with the second heat exchange flow channels of the two heat exchangers, the third control valve component controls the first heat exchange flow channels of the two heat exchangers to be communicated with the corresponding cold supply circulating pipelines, the cold water unit in the refrigeration component operates, the temperature of the water is reduced after the circulating water in the cold storage pipeline enters the refrigeration circulating pipeline and exchanges heat with the cold water unit, the water returns to the cold storage device to realize the cold storage of the cold storage device, the cold water flowing out of the cold storage device sequentially enters the second heat exchange flow channels of the two heat exchangers, the circulating water in the two cold supply devices respectively enters the first heat exchange flow channels of the corresponding heat exchangers to exchange heat with the cold water in the first heat exchange flow channels, thereby realizing the function of cold accumulation and supply at the same time. In conclusion, the double-cold-source water cold-storage air-conditioning system in the embodiment of the application can simultaneously realize multiple operation modes, and can perform cascade utilization on the water temperature of the cold-storage device in the cold-storage mode, so that the cold-storage temperature difference of the double-cold-source water cold-storage air-conditioning system is increased, and the operation cost of the double-cold-source water cold-storage air-conditioning system is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of the connection of a dual cold source chilled water storage air conditioning system according to an embodiment of the present application;

FIG. 2 is a schematic flow diagram of a heat exchange medium in a pipeline when the dual cold source chilled water storage air conditioning system of the embodiment of the present application is in a night cold storage mode;

FIG. 3 is a schematic flow diagram of a heat exchange medium in a pipeline when the dual cold source chilled water storage air conditioning system of the embodiment of the application is in a cold machine cooling mode;

FIG. 4 is a schematic flow diagram of a heat exchange medium in a pipeline when the dual cold source chilled water storage air conditioning system of the embodiment of the application is in a cold supply mode of the cold storage device;

FIG. 5 is a schematic flow diagram of a heat exchange medium in a pipeline when the dual cold source chilled water storage air conditioning system of the embodiment of the present application is in a combined cooling mode;

fig. 6 is a schematic flow diagram of a heat exchange medium in a pipeline when the dual cold source chilled water storage air conditioning system of the embodiment of the application is in a cold storage and supply mode.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description of the present application, "and/or" is only one kind of association relationship describing an associated object, and means that three kinds of relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Referring to fig. 1, the dual cold source chilled water storage air conditioning system of the embodiment of the present application includes a refrigeration cycle assembly, a cold storage cycle assembly, and a cold supply cycle assembly.

Wherein, above-mentioned refrigeration subassembly includes refrigeration cycle pipeline, cooling water set and first control valve subassembly, and cooling water set and first control valve all install on refrigeration cycle pipeline.

The cold accumulation assembly comprises a cold accumulation circulating pipeline, a second control valve assembly and a cold accumulation device, the cold accumulation circulating pipeline is communicated with the refrigeration circulating pipeline, the second control valve assembly and the cold accumulation device are both arranged on the cold accumulation circulating pipeline, and the second control valve assembly is used for controlling the communication or disconnection of the cold accumulation circulating pipeline and the refrigeration circulating pipeline. The cold accumulation device can be a cold accumulation tank or a cold accumulation water tank.

The refrigeration system comprises a refrigeration circulating pipeline, a first refrigeration circulating pipeline, a second refrigeration circulating pipeline, a third control valve assembly and a refrigeration component, wherein the refrigeration component comprises two paths of refrigeration circulating pipelines, two heat exchangers, at least two refrigeration devices and the third control valve assembly; the two heat exchangers are respectively a first heat exchanger and a second heat exchanger, a first heat exchange flow channel of each heat exchanger is connected in series on the cold accumulation circulating pipeline, a second heat exchange flow channel of each heat exchanger is connected in series on the cold supply circulating pipeline, the two heat exchangers respectively correspond to the first cold supply circulating pipeline and the second cold supply circulating pipeline, and the second heat exchange flow channels of the two heat exchangers are connected in series on the cold accumulation circulating pipeline; the two cooling devices are respectively a first cooling device and a second cooling device, the first cooling device and the first heat exchanger are both arranged on a first cooling circulating pipeline, and the second cooling device and the second heat exchanger are both arranged on a second cooling circulating pipeline; and the third control valve assembly is used for controlling the connection or disconnection of the first heat exchange flow channel in the two heat exchangers and the corresponding cooling circulation pipeline. The cooling device may be an air conditioning end unit, such as a fan coil.

The first control valve assembly is used for controlling the refrigeration circulating pipeline to be communicated or disconnected with the two paths of cold supply circulating pipelines, and the refrigeration circulating pipeline is connected with the first heat exchange flow channel of the heat exchanger in parallel.

The second control valve component is also used for controlling the cold accumulation circulating pipeline to be communicated or disconnected with the second heat exchange flow channels in the plurality of heat exchangers.

With reference to fig. 1, the cold accumulation circulation pipeline includes a main cold accumulation circulation pipeline and two first bypass pipelines, and the two first bypass pipelines are respectively connected in parallel with the second heat exchange flow channels of the two heat exchangers. The cold accumulation circulating pipeline assembly further comprises two regulating valves, the two regulating valves are respectively installed on the two first bypass pipelines, and through regulating the opening degree of the regulating valves, cold water flow in the first bypass pipelines can be regulated, so that the cold water flow in the second heat exchange flow channel in the heat exchanger connected with the first bypass pipelines can be reversely regulated, the outlet water temperature of the first heat exchange flow channel of the corresponding heat exchanger is correspondingly increased or reduced, and the cold supply temperature requirement of the corresponding cold supply equipment is met.

For the convenience of automatic control, a temperature detection device is installed in the heat exchanger and used for detecting the outlet water temperature of the second heat exchange flow channel in the heat exchanger, the double-cold-source chilled water storage air conditioning system further comprises a controller, the controller is electrically connected with the temperature detection device and the regulating valve, and the controller can adjust the opening degree of the regulating valve according to the temperature value detected by the temperature detection device, so that the outlet water temperature of the second heat exchange flow channel in the two heat exchangers is automatically regulated. The temperature detection device is a temperature sensor.

In some embodiments, the cooling water units in the refrigeration assembly are in one group, the pipeline connection is simple, and in order to meet the cooling requirement of the cold storage device for realizing two temperatures due to low water temperature, the cooling water units are required to have strong cooling capacity and high power.

In other embodiments, referring to fig. 1, the refrigeration assembly includes a plurality of sets of water chilling units, and further includes a fourth control valve assembly, the fourth control valve assembly is installed on the refrigeration circulation pipeline, and the fourth control valve assembly is used for controlling the plurality of sets of water chilling units to be connected in series or in parallel and the plurality of sets of water chilling units to be connected or disconnected with each other. When the cold accumulation air-conditioning system runs in the cold accumulation mode, the fourth control valve assembly controls the multiple groups of water chilling units to be connected in series, the temperature difference between the return water temperature and the outlet water temperature of the cold accumulation water tank is large through the multiple groups of water chilling units, the multiple groups of water chilling units refrigerate the circulating water of the cold accumulation water tank, the running power of each group of water chilling units can be small, and the cost of the water chilling units in the double-cold-source water cold accumulation air-conditioning system is reduced.

Each cooling circulation pipeline corresponds to a different water chilling unit, or partially overlaps the water chilling unit corresponding to each cooling circulation pipeline. For the latter, the water path control is complex, so in the embodiment of the present application, each cooling circulation pipeline corresponds to a different water chiller, for example, the number of the water chiller in fig. 1 is 3, the 3 water chiller are respectively a first water chiller, a second water chiller and a third water chiller, the first cooling circulation pipeline corresponds to the first water chiller, and the second cooling circulation pipeline corresponds to the second water chiller and the third water chiller.

When a cold water set is adopted to supply cold to the cold supply circulating pipeline (such as a cold machine running mode or a combined cold supply mode), the fourth control valve assembly controls the second cold water set and the third cold water set to be connected in parallel, and simultaneously controls the first cold water set, the second cold water set and the third cold water set to be disconnected, the first control valve assembly controls a part of the refrigeration circulating pipeline where the first cold water set is located to be communicated with the first cold supply circulating pipeline, and simultaneously controls a part of the refrigeration circulating pipeline where the second cold water set and the third cold water set which are connected in parallel are located to be communicated with the second cold supply circulating pipeline.

The refrigeration circulating pipeline comprises a plurality of main refrigeration pipelines and a plurality of second bypass pipelines, at least one water chilling unit is installed on each main refrigeration pipeline, each second bypass pipeline is connected between the two main refrigeration pipelines, each main refrigeration pipeline comprises a refrigeration water inlet pipeline and a refrigeration water return pipeline, the refrigeration water inlet pipeline is communicated with a water inlet of the water chilling unit, and the refrigeration water return pipeline is communicated with a water return port of the water chilling unit.

As for the above-described refrigeration cycle piping, there are various arrangements of the fourth control valve assembly in the refrigeration cycle piping.

For example, a refrigeration inlet pipe and a refrigeration return pipe at two ends of each water chilling unit are connected with each control valve, each bypass pipe is connected with a refrigeration control valve, and the number of the refrigeration control valves adopted in the connection scheme is large.

For another example, referring to fig. 1, the fourth control valve assembly in the refrigeration cycle pipeline includes a plurality of refrigeration control valves and a plurality of bypass control valves, each refrigeration water inlet pipeline or refrigeration water return pipeline communicated with the second bypass pipeline is connected with a refrigeration control valve, each second bypass pipeline is provided with a bypass control valve, each second bypass pipeline is located between a water inlet side of the first refrigeration control valve on the refrigeration water return pipeline in one main refrigeration water inlet pipeline and a water outlet side of the first refrigeration control valve on the refrigeration water inlet pipeline in the other main refrigeration water inlet pipeline, and in this scheme, the number of the fourth control valve assemblies is the minimum on the basis of realizing the serial and parallel control among the plurality of water chiller units.

It should be noted that the refrigeration cycle pipeline in fig. 1 includes a first main refrigeration cycle pipeline and a second main refrigeration cycle pipeline, the first main refrigeration cycle pipeline is connected in parallel with the first heat exchanger, a first water chilling unit is installed on the first main refrigeration cycle pipeline, a second water chilling unit and a third water chilling unit are installed on the second main refrigeration cycle pipeline, the second main refrigeration cycle pipeline is connected in parallel with the second heat exchanger, and the second bypass pipeline includes a first refrigeration bypass pipeline and a second refrigeration bypass pipeline. The first control valve assembly comprises a first refrigeration control valve V1-1 and a second refrigeration control valve V1-2, the first refrigeration control valve V1-1 is installed on a refrigeration water return pipeline of the first main refrigeration circulating pipeline, and the second refrigeration control valve V1-2 is installed on a refrigeration water inlet pipeline of the second main refrigeration circulating pipeline and is positioned on the water inlet sides of the second water chilling unit and the third water chilling unit. The fourth control valve assembly comprises a third refrigeration control valve V1-3, a fourth refrigeration control valve V1-4, a fifth refrigeration control valve V1-5, a sixth refrigeration control valve V1-6, a first bypass control valve Vp-1 and a second bypass control valve Vp-2, wherein the third refrigeration control valve 1-3 is installed on a refrigeration water inlet pipeline of the first main refrigeration circulating pipeline, the fourth refrigeration control valve 1-4 is installed on a refrigeration water return pipeline connected with the second water chilling unit in the second main refrigeration circulating pipeline, the fifth refrigeration control valve V1-5 is installed on a refrigeration water inlet pipeline connected with the second water chilling unit in the second main refrigeration circulating pipeline, and the sixth refrigeration control valve V1-6 is installed on a refrigeration water return pipeline connected with the third water chilling unit in the second main refrigeration circulating pipeline; two ends of the first refrigeration bypass pipeline are respectively communicated with a pipeline on the water outlet side of the third refrigeration control valve V1-3 and a pipeline on the water inlet side of the fourth refrigeration control valve V1-4, two ends of the second refrigeration bypass pipeline are respectively communicated with a pipeline on the water outlet side of the fifth refrigeration control valve V1-5 and a pipeline on the water inlet side of the sixth refrigeration control valve V1-6, the first bypass control valve Vp-1 is installed on the first refrigeration bypass pipeline, and the second bypass control valve Vp-2 is installed on the second refrigeration bypass pipeline.

With continued reference to fig. 1, the cold accumulation circulating pipeline comprises a cold accumulation water inlet pipe and a cold accumulation water return pipe, two ends of the cold accumulation water inlet pipe are respectively communicated with the cold accumulation device and the refrigeration water inlet pipeline of the second main refrigeration circulating pipeline, and the joint of the cold accumulation water inlet pipe and the refrigeration water inlet pipeline of the second main refrigeration circulating pipeline is positioned at the water outlet side of the second refrigeration control valve V1-2; two ends of the cold accumulation water return pipe are respectively communicated with the cold accumulation device and the refrigeration water return pipeline of the first main refrigeration circulating pipeline, and the joint of the cold accumulation water return pipe and the refrigeration water return pipeline of the first main refrigeration circulating pipeline is positioned at the water inlet side of the first refrigeration control valve V1-1. The two first bypass pipelines comprise a first cold accumulation bypass pipeline and a second cold accumulation bypass pipeline, the two regulating valves are a first cold accumulation regulating valve VA-1 and a second cold accumulation regulating valve VA-2, the first cold accumulation regulating valve VA-1 is installed on the first cold accumulation bypass pipeline, and the second cold accumulation regulating valve VA-2 is installed on the second cold accumulation bypass pipeline. The second control valve component comprises a first cold accumulation control valve V2-1, a second cold accumulation control valve V2-2 and a third cold accumulation control valve V2-3, the first cold accumulation control valve V2-1 is installed on the cold accumulation water inlet pipe, the second cold accumulation control valve V2-2 is installed on the cold accumulation water return pipe, the third cold accumulation control valve V2-3 is installed on the main cold accumulation circulating pipeline, and the third cold accumulation control valve V2-3 is located in front of the first heat exchanger and the first cold accumulation regulating valve VA-1.

The third control valve assembly comprises a first cold supply control valve V3-1 and a second cold supply control valve V3-2, the first cold supply control valve V3-1 is installed on the first cold supply circulating pipeline and is positioned between the joint of the first main refrigeration circulating pipeline and the first cold supply circulating pipeline and the inlet of the first heat exchanger, and the second cold supply control valve V3-2 is installed on the second cold supply circulating pipeline and is positioned between the joint of the second main refrigeration circulating pipeline and the second cold supply circulating pipeline and the inlet of the second heat exchanger.

The design of the pipeline and the control valve in the double-cold-source chilled water storage air-conditioning system has the advantages of small quantity of the used control valves, short length of the pipeline and small quantity of the pipeline.

The double-cold-source chilled water storage air conditioning system further comprises a plurality of water pumps, and the water pumps are respectively installed on the chilled water storage circulating pipeline and the two cold supply circulating pipelines.

The double-cold-source chilled water storage air conditioning system shown in fig. 1 comprises a first water pump B1, a second water pump B2, a third water pump B3 and a fourth water pump B4, wherein the first water pump B1 is installed on a cold storage water inlet pipe in a cold storage circulating pipeline and is positioned between a cold storage device and a first cold storage control valve V2-1; the second water pump B2 is arranged on the main cold accumulation circulating pipeline in the cold accumulation circulating pipeline and is positioned between the cold accumulation device and the third cold accumulation control valve V2-3; the third water pump B3 is installed on the first cooling circulation pipe before the first cooling control valve V3-1, and the fourth water pump B4 is installed on the second cooling circulation pipe before the second cooling control valve V3-2.

In order to prevent pumped water from flowing back to the water pumps, a check valve is arranged on a part of the pipeline on the water outlet side of each water pump, the check valve is arranged on the water outlet side of the water pump, and the check valve can prevent water in the pipeline from flowing back to the water pumps in a reverse mode.

The multiple water chilling units in the embodiment of the application can be air-cooled water chilling units and can also be water-cooled water chilling units. The water chilling units shown in fig. 1 are all water-cooled water chilling units, the water chilling units are communicated with the cooling tower, a fifth water pump B5 is installed on a pipeline between the water chilling units and the cooling tower, and a check valve is also installed on a pipeline on the water outlet side of the fifth water pump B5.

The check valves in the embodiment of the application comprise a first check valve VH-1, a second check valve VH-2, a third check valve VH-3, a fourth check valve VH-4 and a fifth check valve VH-5, wherein the first check valve VH-1 is installed on the water outlet side of a first water pump B1, the second check valve VH-1 is installed on the water outlet side of a second water pump B2, the third check valve VH-3 is installed on the water outlet side of a third water pump B3, the fourth check valve VH-4 is installed on the water outlet side of a fourth water pump B4, and the fifth check valve VH-5 is installed on the water outlet side of a fifth water pump B5.

The control valves in the first control valve assembly, the second control valve assembly, the third control valve assembly and the fourth control valve assembly are all electric switch valves, and if the control valves in the control valve assemblies are manual switch valves, the control operation is complicated, and the required labor cost is high. Similarly, in order to facilitate control, the regulating valve in the double-cold-source chilled water storage air conditioning system is an electric regulating valve.

The following describes a plurality of operation modes of the dual cold source chilled water storage air conditioning system with reference to the opening and closing of various valve elements in fig. 1.

When the night cold accumulation mode is operated, the first refrigeration control valve V1-1, the second refrigeration control valve V1-2, the third refrigeration control valve V1-3, the fourth refrigeration control valve V1-4, the fifth refrigeration control valve V1-5, the sixth refrigeration control valve V1-6, the first cold accumulation adjusting valve VA-1, the second cold accumulation adjusting valve VA-2, the third cold accumulation control valve V2-3, the first cold supply control valve V3-1, the second cold supply control valve V3-2, the second water pump B2, the third water pump B3, the fourth water pump B4, the second check valve VH-2, the third check valve VH-3 and the fourth check valve VH-4 are controlled to be closed, and the first bypass control valve Vp-1, the second bypass control valve Vp-2, the first cold accumulation control valve V2-1, the second cold accumulation control valve V2-2 are controlled to be closed, The first water pump B1, the fifth water pump B5, the first check valve VH-1 and the fifth check valve VH-5 are all opened, the three water chilling units in the refrigeration assembly are sequentially connected in series, the circulating water in the cold accumulation pipeline enters the refrigeration circulation pipeline and exchanges heat with the three water chilling units in sequence, the water temperature is reduced, and then the circulating water returns to the cold accumulation device, so that the cold accumulation function of the cold accumulation device is realized, as shown in figure 2.

When the cold machine cold supply mode is operated, the first refrigeration control valve V1-1, the second refrigeration control valve V1-2, the third refrigeration control valve V1-3, the fourth refrigeration control valve V1-4, the fifth refrigeration control valve V1-5, the sixth refrigeration control valve V1-6, the third water pump B3, the fourth water pump B4, the fifth water pump B5, the third check valve VH-3, the fourth check valve VH-4 and the fifth check valve VH-5 are controlled to be opened, and the first cold supply valve V3-1, the second cold supply control valve V3-2, the first regulating valve VA-1, the second cold accumulation regulating valve VA-2, the first bypass control valve Vp-1, the second bypass control valve VA-2, the first cold accumulation control valve V2-1, the second cold accumulation control valve V2-2, the third cold accumulation control valve V2-3, the third cold accumulation control valve V363-5 are controlled to be opened, The first water pump B1, the second water pump B2, the first check valve VH-1 and the second check valve VH-2 are all closed, three water chilling units in the refrigeration assembly are all operated, water in a first cooling circulation pipeline of the cooling device enters the first cooling circulation pipeline and exchanges heat with the first water chilling unit and returns to the first cooling device, water in a second cooling circulation pipeline of the cooling device enters the second cooling circulation pipeline and exchanges heat with a second water chilling unit and a third water chilling unit which are connected in parallel respectively, the temperature is reduced, and the water returns to the second cooling device, so that the cooling function of the cooler is realized, as shown in fig. 3. Wherein the water inlet temperature and the water outlet temperature of the first main refrigeration circulating pipeline can be respectively 12 ℃ and 7 ℃, the water inlet temperature and the water outlet temperature of the second main refrigeration circulating pipeline can be respectively 20 ℃ and 15 ℃, and the water return temperature and the water inlet temperature of the cooling tower can be respectively 37 ℃ and 32 ℃.

When the cold storage device is operated in a cold supply mode, the third cold storage control valve V2-3, the first cold storage regulating valve VA-1, the second cold storage regulating valve VA-2, the first cold supply control valve V3-1, the second cold supply control valve V3-2, the second water pump B2, the third water pump B3, the fourth water pump B4, the second check valve VH-2, the third check valve VH-3 and the fourth check valve VH-4 are controlled to be opened, and the first refrigeration control valve V1-1, the second refrigeration control valve V1-2, the third refrigeration control valve V1-3, the fourth refrigeration control valve V1-4, the fifth refrigeration control valve V1-5, the sixth refrigeration control valve V1-6, the first bypass control valve Vp-1, the second bypass control valve Vp-2, the first cold storage control valve V2-1, the second cold storage control valve V2-2, The first water pump B1, the fifth water pump B5, the first check valve VH-1 and the fifth check valve VH-5 are all closed, the circulating water in the first cold supply device enters a first heat exchange flow channel in the first heat exchanger, the circulating water in the second cold supply device enters a first heat exchange flow channel in the second heat exchanger, the cold water flowing out of the cold accumulation device sequentially enters a second heat exchange flow channel in the first heat exchanger and a second heat exchange flow channel in the second heat exchanger for heat exchange, the temperature of the water flowing out of the first heat exchange flow channel of the first heat exchanger and the temperature of the water flowing out of the first heat exchange flow channel of the second heat exchanger are both reduced, the temperature of the water outlet of the first heat exchanger is lower than that of the water outlet of the second heat exchanger, the cold accumulation device can meet different cold supply temperature requirements of the first cold supply device and the second cold supply device by adjusting the opening degrees of the first cold accumulation adjusting valve VA-1 and the second adjusting valve VA-2, as shown in fig. 4. The water inlet temperature and the water outlet temperature of the first heat exchanger can be respectively 12 ℃ and 7 ℃, the water inlet temperature and the water outlet temperature of the second heat exchanger can be respectively 20 ℃ and 15 ℃, and the water return temperature and the water inlet temperature of the cooling tower can be respectively 37 ℃ and 32 ℃.

When the combined cooling mode is operated, the first cooling control valve V1-1, the second cooling control valve V1-2, the third cooling control valve V1-3, the fourth cooling control valve V1-4, the fifth cooling control valve V1-5, the sixth cooling control valve V1-6, the first cooling control valve V3-1, the second cooling control valve V3-2, the first cold accumulation regulating valve VA-1, the second regulating valve VA-2, the third cold accumulation control valve V2-3, the second water pump B2, the third water pump B3, the fourth water pump B4, the fifth water pump B5, the second check valve VH-2, the third check valve VH-3, the fourth check valve VH-4 and the fifth check valve VH-5 are controlled to be opened, and the first bypass control valve Vp-1, the second bypass control valve Vp-2 are controlled to be opened simultaneously, The first cold storage control valve V2-1, the second cold storage control valve V2-2, the first water pump B1 and the first check valve VH-1 are all closed, part of circulating water in the first cold supply device enters a first refrigeration circulating pipeline and exchanges heat with a first water chilling unit, the temperature is reduced, and then the circulating water returns to the cold supply device, the residual circulating water in the first cold supply device respectively enters a first heat exchange channel in a first heat exchanger and exchanges heat with cold water flowing out of the cold storage device and entering a second heat exchange channel in the first heat exchanger, the temperature is reduced, and then the circulating water returns to the cold supply device, part of circulating water in the second cold supply device enters a second refrigeration circulating pipeline and exchanges heat with a second water chilling unit and a third water chilling unit respectively, the temperature is reduced, the circulating water returns to the cold supply device, the residual circulating water in the second cold supply device respectively enters a first heat exchange channel in a second heat exchanger, and exchanges heat with cold water flowing out of the second heat exchange flow channel in the first heat exchanger and then entering the second heat exchange flow channel of the second heat exchanger, the temperature is reduced, and the cold water returns to the cold supply device, so that combined cold supply of the cold machine and the cold accumulation device is realized, as shown in fig. 5.

When the cold accumulation and supply mode is operated, the first refrigeration control valve V1-1, the second refrigeration control valve V1-2, the third refrigeration control valve V1-3, the fourth refrigeration control valve V1-4, the fifth refrigeration control valve V1-5 and the sixth refrigeration control valve V1-6 are controlled to be closed, and the first bypass control valve Vp-1, the second bypass control valve Vp-2, the first cold accumulation control valve V2-1, the second cold accumulation control valve V2-2, the third cold accumulation control valve V2-3, the first cold accumulation regulating valve VA-1, the second cold accumulation regulating valve VA-2, the first cold supply control valve V3-1, the second cold supply control valve V3-2, the first water pump B1, the second water pump B2, the third water pump B3, the fourth water pump B4, the fifth water pump B5, the first check valve V361-VH 2 and the second check valve VH 2 are controlled to be closed, The third check valve VH-3, the fourth check valve VH-4 and the fifth check valve VH-5 are all opened, three water chilling units in the refrigeration assembly are connected in series to operate at the same time, and after circulating water in the cold accumulation pipeline enters the refrigeration circulating pipeline and exchanges heat with the third water chilling unit, the second water chilling unit and the first water chilling unit in sequence, the water temperature is reduced, and then the circulating water returns to the cold accumulation device, so that the cold accumulation function of the cold accumulation device is realized; cold water flowing out of the cold storage device sequentially enters the second heat exchange flow channel in the first heat exchanger and the second heat exchange flow channel in the second heat exchanger, and cold water in the two cold supply devices respectively enters the first heat exchange flow channels in the corresponding heat exchangers for heat exchange, so that the cold supply function of the cold storage device is realized, as shown in fig. 6.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A double cold source chilled water storage air conditioning system is characterized by comprising:

the refrigeration assembly comprises a refrigeration circulating pipeline, and a water chilling unit and a first control valve assembly which are both arranged on the refrigeration circulating pipeline;

the cold accumulation assembly comprises a cold accumulation circulating pipeline, and a second control valve assembly and a cold accumulation device which are both arranged on the cold accumulation circulating pipeline, the cold accumulation circulating pipeline is communicated with the refrigeration circulating pipeline, and the second control valve assembly is used for controlling the cold accumulation circulating pipeline to be communicated or disconnected with the refrigeration circulating pipeline;

the cold supply assembly comprises two cold supply circulating pipelines, two heat exchangers, at least two cold supply devices and a third control valve assembly arranged on the two cold supply circulating pipelines, the two cold supply circulating pipelines are communicated with the refrigeration circulating pipeline, a first heat exchange runner in each heat exchanger is connected in series on the cold storage circulating pipeline, a second heat exchange runner in each heat exchanger is connected in series on the cold supply circulating pipeline, the two heat exchangers and the two cold supply circulating pipelines respectively correspond to each other, and the second heat exchange flow channels of the two heat exchangers are mutually connected in series on the cold accumulation circulating pipeline, the two cold supply devices are respectively arranged on the two cold supply circulating pipelines, the third control valve assembly is used for controlling the first heat exchange flow channel in the two heat exchangers to be communicated or disconnected with the corresponding cooling circulation pipeline;

the first control valve assembly is used for controlling the refrigeration circulating pipeline to be communicated with or disconnected from the two paths of cooling circulating pipelines, and the refrigeration circulating pipeline is connected with a first heat exchange flow channel of the heat exchanger in parallel;

and the second control valve assembly is also used for controlling the cold accumulation circulating pipeline to be communicated with or disconnected from the second heat exchange flow channel in the two heat exchangers.

2. The dual cold source chilled water storage air conditioning system of claim 1, wherein the chilled storage circulation duct comprises:

a main cold storage circulation pipeline;

the two first bypass pipelines are respectively connected with the second heat exchange flow channels of the two heat exchangers in parallel;

the cold accumulation assembly further comprises two regulating valves, and the two regulating valves are respectively installed on the two first bypass pipelines.

3. The dual cold source chilled water storage air conditioning system according to claim 2, wherein a temperature detecting device is installed in the heat exchanger, and the temperature detecting device is used for detecting the outlet water temperature of the second heat exchange flow channel in the heat exchanger, and further comprising:

and the controller is electrically connected with the temperature detection device and the regulating valve and is used for regulating the opening degree of the regulating valve according to the temperature value detected by the temperature detection device.

4. The dual cold source chilled water storage air conditioning system according to any of claims 1-3, wherein there are multiple sets of chiller units in the refrigeration assembly, the refrigeration assembly further comprising:

and the fourth control valve assembly is arranged on the refrigeration circulating pipeline and is used for controlling the multiple groups of water chilling units to be connected in series or in parallel and the multiple groups of water chilling units to be mutually communicated or disconnected.

5. The dual cold source chilled water storage air conditioning system according to claim 4, wherein the refrigeration cycle pipe comprises a plurality of main refrigeration pipes and a plurality of second bypass pipes, at least one of the chiller units is installed on each of the main refrigeration pipes, and each of the second bypass pipes is connected between two of the main refrigeration pipes;

the main refrigeration pipeline include with the refrigeration inlet channel of the water inlet intercommunication of cooling water set and with the refrigeration return water pipe of the delivery port intercommunication of cooling water set, fourth control valve subassembly includes a plurality of refrigeration control valves and a plurality of bypass control valve, every with the refrigeration inlet channel or the refrigeration return water pipe of second by pass line intercommunication are connected with one refrigeration control valve, every install one on the second by pass line bypass control valve, the second by pass line is located all the way the side of intaking and another of the first refrigeration control valve on the refrigeration return water pipe in the main refrigeration inlet channel between the play water side of the first refrigeration control valve on the refrigeration inlet channel in the main refrigeration inlet channel.

6. The dual cold source chilled water storage air conditioning system of claim 1, further comprising:

and the water pumps are respectively arranged on the cold accumulation circulating pipeline and the two cold supply circulating pipelines.

7. The dual cold source chilled water storage air conditioning system of claim 6, further comprising:

the check valves are arranged on the water outlet side of the water pump and correspond to the water pumps one to one.

8. The dual cold source chilled water storage air conditioning system of claim 5, wherein the first and second refrigeration control valves are both electrically operated on-off valves.

9. The dual cold source chilled water storage air conditioning system of claim 2, wherein the regulating valve is an electrically operated regulating valve.

10. The dual cold source chilled water storage air conditioning system according to claim 1, wherein the chiller is a water-cooled chiller.