CN115419961A - Air conditioning system - Google Patents

Abstract

The invention belongs to the technical field of air conditioners and discloses an air conditioning system which comprises a double-working-condition refrigerating unit, an ice making unit, a heat preservation tank and an air conditioning tail end, wherein the double-working-condition refrigerating unit is circularly communicated with the ice making unit, is used for supplying supercooled water to the ice making unit and also is used for supplying first cold energy to the air conditioning tail end, the ice making unit is circularly communicated with the heat preservation tank, the ice making unit is used for making the supercooled water into an ice-water mixture and supplying the ice-water mixture to the heat preservation tank, the heat preservation tank is used for storing the ice-water mixture, and water in the ice-water mixture can be used as first chilled water on the primary side to supply second cold energy to the air conditioning tail end.

Description

Air conditioning system

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioning system.

Background

Along with the development of economy in China, the energy consumption also tends to rise year by year. The development of industrial parks, offices and businesses caused by city construction increases the number of buildings, the size of buildings and the power consumption. In addition, the buildings in industrial parks, offices, businesses and the like have refrigeration requirements, the energy consumption ratio of air conditioning systems in the building energy consumption is large, and due to the influence of working time, the running time of the air conditioning systems of the buildings has a part overlapping with the urban power consumption peak, so that the seasonal peak-valley difference and the daily peak-valley difference of an urban power grid are seriously influenced by the continuously increased air conditioning load, and even become the main reason of seasonal power shortage.

At present, "shifting peak and filling valley" is a more effective means for alleviating the above problems, i.e. the power in the night electricity utilization valley period is stored and then transferred to the electricity utilization peak period for use. At present, a common 'peak load shifting' means in the field of air conditioners is to add a water storage tank in an air conditioning system, start the air conditioning system at the night power utilization valley time, store cold water supplied by the air conditioning system in the water storage tank, and supply cold water in the water storage tank to the tail end of the air conditioner at the daytime power utilization peak time, so that the problem that the daytime power utilization peak time coincides with the air conditioner load peak time is solved.

However, the cold storage density of the liquid cold water is low, so that the cold storage capacity of the whole water storage tank is low, and further the whole cold release capacity of the water storage tank is low, if the whole cold release capacity of the water storage tank is to be improved, the volume of the water storage tank needs to be enlarged, so that the floor area of the water storage tank is enlarged, if the floor area of the water storage tank cannot be enlarged, the whole cold release capacity of the water storage tank cannot be improved, and further the cold supply capacity of the air conditioning system is limited. Therefore, it is desirable to provide an air conditioning system to solve the above technical problems.

Disclosure of Invention

The invention aims to provide an air conditioning system, wherein a heat-insulating tank of the air conditioning system has high cooling capacity, and the air conditioning system also has rich use modes.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an air conditioning system, including dual mode refrigerating unit, the ice making unit, heat preservation jar and air conditioner end, dual mode refrigerating unit and ice making unit circulation intercommunication, dual mode refrigerating unit is used for supplying subcooled water to the ice making unit, and dual mode refrigerating unit still is used for providing first cold volume to the air conditioner end, the ice making unit and heat preservation jar circulation intercommunication, the ice making unit can make the subcooled water into ice-water mixture and supply ice-water mixture to the heat preservation jar, the heat preservation jar can store ice-water mixture, and hydroenergy in the ice-water mixture can provide the second cold volume as the first refrigerated water of one side to the air conditioner end.

Optionally, the air conditioning system further includes a first heat exchanger, and the primary side first chilled water supplies second cooling capacity to the tail end of the air conditioner through the first heat exchanger.

Optionally, the heat preservation tank has a water outlet and a water inlet, the water outlet is respectively communicated with the water return end of the ice making unit and the first water inlet end of the first heat exchanger, and the water inlet is respectively communicated with the water outlet end of the ice making unit and the first water outlet end of the first heat exchanger.

Optionally, the water inlet is arranged at the top of the heat preservation tank.

Optionally, the water inlet comprises a first water inlet and a second water inlet, the first water inlet is communicated with a water outlet end of the ice making unit, the second water inlet is communicated with a first water outlet end of the first heat exchanger through a water inlet pipe, part of the water inlet pipe is arranged in the heat insulation tank, and the water inlet pipe is provided with a spray head.

Optionally, the number of the spray heads is multiple, and the multiple spray heads are uniformly distributed along the circumferential direction or the radial direction of the heat preservation tank.

Optionally, the water outlet is located at the bottom of the insulated tank.

Optionally, the air conditioning system further comprises a heating unit, the heating unit is circularly communicated with the heat preservation tank, the heating unit is used for supplying hot water to the heat preservation tank, the heat preservation tank can also store hot water, and the hot water in the heat preservation tank can supply heat to the tail end of the air conditioner.

Optionally, the hot water provides heat to the air conditioning terminal through a first heat exchanger.

Optionally, the air conditioning system further comprises a second heat exchanger, the dual-operating-condition refrigerating unit is further in circulating communication with the second heat exchanger, the dual-operating-condition refrigerating unit is further used for supplying refrigerant water to the second heat exchanger, and the refrigerant water in the second heat exchanger can serve as the primary side second chilled water to provide first cooling capacity for the tail end of the air conditioner.

Has the advantages that:

the air conditioning system provided by the invention has the advantages that the double-working-condition refrigerating unit is circularly communicated with the ice making unit, so that the double-working-condition refrigerating unit can provide first cooling capacity for the tail end of the air conditioner and can also supply supercooled water to the ice making unit, the ice making unit is circularly communicated with the heat preservation tank, the supercooled water is made into an ice water mixture, the ice water mixture is supplied to the heat preservation tank, the heat preservation tank is used for storing the ice water mixture, and water in the ice water mixture can be used as first chilled water on the primary side to provide second cooling capacity for the tail end of the air conditioner. On the other hand, according to the air conditioning system provided by the invention, the dual-working-condition refrigerating unit can provide first cooling capacity to the tail end of the air conditioner, and water in an ice-water mixture in the heat preservation tank can be used as first chilled water on the primary side to provide second cooling capacity to the tail end of the air conditioner, so that the same air conditioning system is provided with two cooling capacity supply ends, the use mode of the air conditioning system is enriched, and the use requirements of different users can be met.

Drawings

FIG. 1 is a schematic diagram of an air conditioning system provided by the present invention;

fig. 2 is a schematic structural diagram of the heat-preserving tank provided by the invention.

In the figure:

100. a dual-mode refrigeration unit; 200. an ice making unit; 300. a heat preservation tank; 310. conveying a ice-water mixture pipe; 320. a water inlet pipe; 321. a spray head; 330. a first water outlet pipe; 340. a second water outlet pipe; 410. a first heat exchanger; 420. a second heat exchanger; 500. a heating unit; 710. a water collector; 720. a water separator; 800. a cooling tower;

b1, a first water pump; b2, a second water pump; b3, a third water pump; b4, a fourth water pump; b5, a fifth water pump; b6, a sixth water pump; b7, a seventh water pump;

v1, a first one-way valve; v2, a second one-way valve; v3, a third one-way valve; v4, a fourth one-way valve; v5, a fifth one-way valve; v6, a sixth one-way valve; v7, a seventh check valve; v8, an eighth check valve; v9, a ninth check valve; v10, tenth check valve; v11, an eleventh check valve; v12 and a twelfth check valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides an air conditioning system, and the heat preservation tank of the air conditioning system has higher cooling capacity and richer use modes.

Specifically, as shown in fig. 1, the air conditioning system includes a dual-condition refrigeration unit 100, an ice making unit 200, a thermal insulation tank 300 and an air conditioning terminal, the dual-condition refrigeration unit 100 is in circulation communication with the ice making unit 200, the dual-condition refrigeration unit 100 is configured to supply supercooled water to the ice making unit 200, the dual-condition refrigeration unit 100 is further configured to provide first cooling capacity to the air conditioning terminal, the ice making unit 200 is in circulation communication with the thermal insulation tank 300, the ice making unit 200 can make the supercooled water into an ice-water mixture and supply the ice-water mixture to the thermal insulation tank 300, the thermal insulation tank 300 can store the ice-water mixture, and water in the ice-water mixture can serve as first chilled water on a primary side to provide second cooling capacity to the air conditioning terminal.

The dual-working-condition refrigerating unit 100 is communicated with the ice making unit 200 in a circulating mode, so that the dual-working-condition refrigerating unit 100 supplies supercooled water to the ice making unit 200, the ice making unit 200 makes the supercooled water into an ice-water mixture, and then the ice-water mixture is supplied into the heat preservation tank 300, compared with liquid water, the cold storage density of the ice-water mixture is high, and therefore compared with the technical scheme of storing the liquid water in the water storage tank, the technical scheme of storing the ice-water mixture in the heat preservation tank 300 provided by the embodiment achieves the purposes that the cold storage capacity and the cold release capacity of the whole heat preservation tank 300 are improved under the condition that the volume of the heat preservation tank 300 is not changed, and further the cold supply capacity of an air conditioning system is improved. On the other hand, compared with the technical scheme of storing static ice in the water storage tank, the cooling rate of the ice-water mixture is higher than that of the static ice, so that the overall heat-insulating tank 300 in the technical scheme provided by the embodiment has a higher cooling rate, and the cooling response time of the air conditioning system can be shortened. On the other hand, in this embodiment, the dual-condition refrigeration unit 100 can provide the first cooling capacity to the air conditioner terminal, and the water in the ice-water mixture in the heat-insulating tank 300 can be used as the first chilled water on the primary side to provide the second cooling capacity to the air conditioner terminal, so that the same air conditioning system has two cooling capacity supply ends, the use mode of the air conditioning system is enriched, and the use requirements of different users can be met. It should be noted that the process and principle of producing supercooled water by the dual-operating-condition refrigerator set 100 and the process and principle of producing ice-water mixture by the ice-making unit 200 are well-established prior art in the field, and are not described herein again. In this embodiment, the dual-condition refrigerator unit 100 provides the ice making unit 200 with the supercooled water at the temperature of-2 ℃, and in other embodiments, the dual-condition refrigerator unit 100 may also provide the ice making unit 200 with the supercooled water at other temperatures, such as-1 ℃ or-3 ℃.

Further, as shown in fig. 1, the air conditioning system further includes a first heat exchanger 410, the primary side first chilled water supplies the second cooling capacity to the tail end of the air conditioner through the first heat exchanger 410, and specifically, the first heat exchanger 410 has a first water inlet end, a first water outlet end, a second water inlet end, and a second water outlet end, the first water inlet end and the first water outlet end are used for being in circulation communication with the heat preservation tank 300, the second water inlet end and the second water outlet end are used for being in circulation communication with the tail end of the air conditioner, the primary side first chilled water flows out of the heat preservation tank 300 through the first water inlet end and enters the first heat exchanger 410, the secondary side chilled water flowing in the tail end of the air conditioner enters the first heat exchanger 410 through the second water inlet end, the primary side first chilled water exchanges heat with the secondary side chilled water in the first heat exchanger 410 through the first water outlet end, then the primary side first chilled water absorbing the heat is discharged out of the first heat exchanger 410 through the first water outlet end and returns to the heat preservation tank 300, and the secondary side chilled water having discharged the heat returns to the tail end of the air conditioner through the second water outlet end through the second water, thereby realizing that the first heat exchanger 410 supplies the second chilled water to the tail end of the cooling capacity of the air conditioner through the first heat exchanger 410. In addition, compared to the technical solution of storing static ice in the water storage tank, the technical solution provided in this embodiment can supply the second cooling capacity to the end of the air conditioner by only circulating and communicating the heat preservation tank 300 and the first heat exchanger 410, specifically, if static ice is stored in the water storage tank, a heat exchange pipeline needs to be arranged in the water storage tank, so that the primary side chilled water (or the secondary side chilled water) flows in the heat exchange pipeline to realize the heat exchange between the primary side chilled water (or the secondary side chilled water) and the static ice, and in the technical solution of storing an ice-water mixture in the heat preservation tank 300, only the heat preservation tank 300 needs to be circularly communicated with the first heat exchanger 410, so that the primary side first chilled water can circularly flow between the heat preservation tank 300 and the first heat exchanger 410, and the structure of arranging and exchanging the heat exchange pipeline in the heat preservation tank 300 is omitted. In this embodiment, the first heat exchanger 410 is a plate heat exchanger, and the plate heat exchanger has advantages such as high heat exchange efficiency, small heat loss, and compact structure, and further can improve the heat exchange amount between the primary side first chilled water and the secondary side chilled water, and can also reduce the floor area of the air conditioning system, and certainly, in other embodiments, the first heat exchanger 410 can also select its heat exchangers such as a shell and tube heat exchanger.

Further, as shown in fig. 1 and 2, the thermal insulation tank 300 has a water outlet and a water inlet, the water outlet is communicated with the water return end of the ice making unit 200 through a first water outlet pipe 330, the water outlet is also communicated with the first water inlet end of the first heat exchanger 410 through a second water outlet pipe 340, and the water inlet is respectively communicated with the water outlet end of the ice making unit 200 and the first water outlet end of the first heat exchanger 410, thereby realizing the circulation communication between the thermal insulation tank 300 and the dual-operating-condition refrigerating unit 100 and the circulation communication between the thermal insulation tank 300 and the first heat exchanger 410, when the ice water mixture needs to be stored in the thermal insulation tank 300, the ice making unit 200 and the dual-operating-condition refrigerating unit 100 are started, and the pipeline between the ice making unit 200 and the thermal insulation tank 300 is conducted, the pipeline between the dual-operating-condition refrigerating unit 100 and the ice making unit 200 is conducted, the dual-operating-condition refrigerating unit 100 supplies the supercooled water of-2 ℃ to the ice making unit 200, the supercooled water of-2 ℃ is made into the ice water mixture, and then the ice water mixture is made into the thermal insulation tank 300, and then the ice water mixture is made into the ice making into the thermal insulation mixture; when water in the ice-water mixture is needed to provide second cooling capacity for the tail end of the air conditioner, a pipeline between the heat preservation tank 300 and the first heat exchanger 410 is conducted, a water pump on the pipeline is started, water in the ice-water mixture serving as primary side first chilled water enters the first heat exchanger 410 to exchange heat with secondary side chilled water, and then is discharged from the first heat exchanger 410 and returns to the heat preservation tank 300.

Preferably, as shown in fig. 1 and 2, the water inlet is disposed at the top of the thermal insulation tank 300, and the density of the liquid water in the ice-water mixture is greater than the density of the solid ice floc, so that the ice-water mixture in the thermal insulation tank 300 will have a state of sinking the liquid water and floating the solid ice floc, and since the water inlet is respectively communicated with the water outlet of the ice making unit 200 and the first water outlet of the first heat exchanger 410, the ice-water mixture produced by the ice making machine will enter the thermal insulation tank 300 from the top, which is beneficial to the sinking of the liquid water with a greater density in the thermal insulation tank 300 and the floating of the solid ice floc with a smaller density in the thermal insulation tank 300, and the primary side first chilled water backwater with a higher temperature absorbing heat in the first heat exchanger 410 enters the thermal insulation tank 300 from the top, so that the effect of spraying the higher temperature primary side first chilled water backwater on the upper ice floc is formed, which can accelerate the melting of the ice floc, the melting of the melted ice floc sinks to the lower portion of the thermal insulation tank 300, and the ice floc absorbs heat in the melting process, so that the overall temperature distribution of the thermal insulation tank 300 is uniformly distributed in the height direction, thereby further improving the overall cold storage and the overall cold storage tank 300, and further improving the overall cold supply and shortening of the thermal insulation tank 300.

Further, as shown in fig. 1 and 2, the water inlets include a first water inlet and a second water inlet, the first water inlet is communicated with the water outlet end of the ice making unit 200 through an ice-water mixture conveying pipe 310, the second water inlet is communicated with the first water outlet end of the first heat exchanger 410 through a water inlet pipe 320, a part of the water inlet pipe 320 is disposed in the heat insulation tank 300, a nozzle 321 is disposed on the water inlet pipe 320, the contact area between the first chilled water backwater sprayed by the dividing head and the ice flocs on the primary side is large, the ice flocs melting rate and the heat absorbed by the ice flocs in the melting process can be further increased, and in addition, the first water inlet and the second water inlet are separately disposed, so that the problem that the nozzle 321 is blocked by the ice-water mixture produced by the ice making machine is avoided.

Preferably, as shown in fig. 1 and fig. 2, the number of the spray heads 321 is multiple, and the multiple spray heads 321 are uniformly distributed along the circumferential direction or the radial direction of the heat-preserving tank 300, so that ice flocs floating at different positions in the heat-preserving tank 300 can be uniformly contacted with the first high-temperature return water of the primary side chilled water, the overall melting rate of the ice flocs at different positions in the heat-preserving tank 300 is increased, heat absorbed by the ice flocs at different positions in the heat-preserving tank 300 in the melting process can be uniform, finally the water temperature at the bottom of the heat-preserving tank 300 is uniform, and the second cooling capacity provided by the first primary side chilled water for the tail end of the air conditioner is stable.

Alternatively, as shown in fig. 1 and 2, the water outlet of the thermal insulation tank 300 is located at the bottom thereof, which facilitates the water concentrated at the bottom of the thermal insulation tank 300 to be discharged from the water outlet, reduces the probability of solid ice flocs in the water discharged from the water outlet, and avoids the problem of blockage of the pipeline between the water outlet and the water outlet end of the ice maker set 200 and the pipeline between the water outlet and the first water outlet end of the first heat exchanger 410.

Optionally, as shown in fig. 1 and fig. 2, the air conditioning system further includes a heating unit 500, the heating unit 500 is in circulating communication with the heat-insulating tank 300, the heating unit 500 is configured to supply hot water to the heat-insulating tank 300, the heat-insulating tank 300 is further capable of storing hot water, and the hot water in the heat-insulating tank 300 is capable of providing heat to the air conditioning terminal, so that the air conditioning system is capable of storing not only cold and providing cold for the air conditioning terminal, but also storing heat and providing heat for the air conditioning terminal, thereby implementing two functions of cooling and heating of the air conditioning system. It should be noted that, compared to the technical scheme of storing static ice in the water storage tank, the characteristic that the air conditioning system can store heat is particularly prominent in this embodiment, specifically, as described above, if static ice is stored in the water storage tank, a heat exchange pipeline needs to be arranged in the water storage tank, so that the function of storing hot water in the water storage tank is affected, and the economy of the air conditioning system is reduced, but in the technical scheme of this embodiment, a heat exchange pipeline does not need to be arranged in the heat preservation tank 300, so that the heat preservation tank 300 can store both ice-water mixture and hot water, and the effect that the heat preservation tank 300 can store both cold and heat is achieved. Alternatively, the heating unit 500 may be an electric boiler, a gas/oil boiler, various heat pump units, or a solar heat supply unit, etc.

Further, as shown in fig. 1 and 2, hot water in the heat-preserving tank 300 provides heat to the air-conditioning terminal through the first heat exchanger 410, specifically, a water outlet of the heat-preserving tank 300 is respectively communicated with a water return end of the ice-making unit 200, a first water inlet end of the first heat exchanger 410 and a water return end of the heating unit 500, a water outlet end of the heating unit 500 is communicated with a first water outlet end of the first heat exchanger 410, so that circulation communication between the heat-preserving tank 300 and the heating unit 500 is realized, the hot water in the heat-preserving tank 300 enters the first heat exchanger 410 and exchanges heat with secondary side heat medium water in the first heat exchanger 410, the hot water which emits heat in the first heat exchanger 410 is returned to the heat-preserving tank 300 through the first heat exchanger 410, and the hot water in the heat-preserving tank 300 provides heat to the air-conditioning terminal through the first heat exchanger 410.

In one embodiment, the water outlet end of the heating unit 500 is communicated with the bottom of the thermal insulation tank 300, hot water supplied to the thermal insulation tank 300 by the heating unit 500 enters the thermal insulation tank 300 from the bottom of the thermal insulation tank 300, and the density of the water with a slightly higher temperature is higher, so that the hot water with a higher temperature introduced from the bottom of the thermal insulation tank 300 flows from bottom to top in the thermal insulation tank 300, the water stored in the thermal insulation tank 300 is disturbed in the flowing process, the overall temperature of the hot water stored in the thermal insulation tank 300 is more uniform, and further, when the hot water in the thermal insulation tank supplies heat to the end of the air conditioner, the heat supply amount is more uniform.

Optionally, as shown in fig. 1 and fig. 2, the air conditioning system further includes a second heat exchanger 420, the dual-condition refrigeration unit 100 is further in circulating communication with the second heat exchanger 420, the dual-condition refrigeration unit 100 is further configured to supply refrigerant water to the second heat exchanger 420, the refrigerant water in the second heat exchanger 420 can be used as primary side second chilled water to provide first cooling capacity to the end of the air conditioner, specifically, the second heat exchanger 420 has a third water inlet end, a third water outlet end, a fourth water inlet end and a fourth water outlet end, the third water inlet end and the third water outlet end are used for being in circulating communication with the dual-condition refrigeration unit 100, the fourth water inlet end and the fourth water outlet end are used for being in circulating communication with the end of the air conditioner, the refrigerant water produced by the dual-condition refrigeration unit 100 is used as primary side second chilled water to enter the second heat exchanger 420 through the third water inlet end, the secondary side chilled water flowing at the end of the air conditioner enters the second heat exchanger 420 through the fourth water inlet end, in the second heat exchanger 420, and then the secondary side chilled water having absorbed heat is discharged to the secondary side chilled water to return to the secondary side heat exchanger 100 through the second heat exchanger 420. In this embodiment, the second heat exchanger 420 is a plate heat exchanger, and the plate heat exchanger has advantages such as heat exchange efficiency is high, the heat loss is little, compact structure, and then can improve the heat transfer volume between the primary side second refrigerated water and the secondary side refrigerated water, can also reduce air conditioning system's area, and of course, in other embodiments, other heat exchangers such as shell and tube heat exchangers can also be chooseed for use to the second heat exchanger 420. It should be noted that the temperature of the refrigerant water produced by the dual-operating-condition refrigeration unit 100 in the field is usually 2 ℃ to 7 ℃, and the processes and principles thereof are common prior art in the field and are not described herein again.

Optionally, the air conditioning system that this embodiment provided still includes liquid level sensor, temperature-sensing ware and controller, and liquid level sensor and temperature-sensing ware all set up in holding tank 300 and all with controller signal connection to the realization detects and controls the memory space and the temperature of ice-water mixture in holding tank 300.

In the air conditioning system provided in this embodiment, the cooling tower 800 is used for cooling the condensation end of the dual-operating-condition refrigeration unit 100, and ethylene glycol is used as the coolant between the dual-operating-condition refrigeration unit 100 and the cooling tower 800, but not specifically limited herein, the dual-operating-condition refrigeration unit 100, the ice making unit 200, and the thermal insulation tank 300 together form a dynamic ice making system, the thermal insulation tank 300 is used for storing an ice-water mixture, and the thermal insulation tank 300 is in circulating communication with the first heat exchanger 410, and water in the ice-water mixture is used as primary-side first chilled water to provide second cooling capacity to the end of the air conditioner, compared with the technical scheme of storing static ice in the water storage tank, the air conditioning system provided in this embodiment does not need to arrange a heat exchange pipeline in the thermal insulation tank 300, not only uses a storage device with a thermal insulation function as the thermal insulation tank 300, but also can implement a thermal storage function of the air conditioning system, so that the air conditioning system can still meet the usage requirement of "peak load peak and valley" in winter, and the thermal insulation technology of the air conditioning system can effectively shorten the overall cooling rate of the thermal insulation tank 300 when the ice-water storage tank stores ice water in comparison with the technical scheme of the water storage tank. Compared with the technical scheme of storing cold water in the water storage tank, under the condition that the volume of the heat-preservation tank 300 is not changed, the whole cold storage capacity and the whole cold releasing capacity of the heat-preservation tank 300 can be effectively improved, and the cold supply capacity and the economical efficiency of the air conditioning system are effectively improved.

The following briefly describes the operation principle of the air conditioning system provided in this embodiment under different working conditions, and for ease of understanding, the following components are named:

referring to fig. 1, a second water inlet end of the first heat exchanger 410 and a fourth water inlet end of the second heat exchanger 420 are both communicated with the air conditioner terminal through a water collector 710, and a second water outlet end of the first heat exchanger 410 and a fourth water outlet end of the second heat exchanger 420 are both communicated with the air conditioner terminal through a water separator 720;

a first water pump B1 is arranged at an inlet of an evaporation end of the dual-working-condition refrigerating unit 100, a second water pump B2 is arranged at an outlet of a condensation end of the dual-working-condition refrigerating unit 100, a third water pump B3 is arranged between the heat preservation tank 300 and a water return end of the ice making unit 200, a fourth water pump B4 is arranged at a first water inlet end of the first heat exchanger 410, a fifth water pump B5 is arranged at a water inlet end of the heating unit 500, a sixth water pump B6 is arranged at a fourth water outlet end of the second heat exchanger 420, and a seventh water pump B7 is arranged at a second water outlet end of the first heat exchanger 410;

a first check valve V1 is arranged between the outlet of the evaporation end of the dual-working-condition refrigerating unit 100 and the third water inlet end of the second heat exchanger 420, a second check valve V2 is arranged between the outlet of the evaporation end of the dual-working-condition refrigerating unit 100 and the water return end of the ice making unit 200, a third check valve V3 is arranged between the water outlet end of the ice making unit 200 and the first water inlet end of the heat-insulating tank 300, a fourth check valve V4 is arranged between the water outlet end of the heat-insulating tank 300 and the water return end of the ice making unit 200, a fifth check valve V5 is arranged between the water outlet end of the heat-insulating tank 300 and the first water inlet end of the first heat exchanger 410, a sixth check valve V6 is arranged between the first water outlet end of the first heat exchanger 410 and the second water inlet end of the heat-insulating tank 300, a seventh check valve V7 is arranged between the water outlet end of the heating unit 500 and the third water inlet end of the heat-insulating tank 300, an eighth check valve V8 is arranged between the water outlet end of the heat-insulating tank 300 and the water inlet end of the heating unit 500, a ninth check valve V9 is arranged between the water collector 710 and the fourth water inlet end of the tenth check heat exchanger 410, a ninth check valve V11 is arranged between the ninth check valve V11 and the tenth water collector 720;

the working condition I is as follows: the air conditioning system provides first cooling capacity to the tail end of the air conditioner

The dual-working-condition refrigerating unit 100 is started, the ice making unit 200 and the heating unit 500 are both closed, the first water pump B1, the second water pump B2 and the sixth water pump B6 are opened, the rest of the water pumps are closed, the first one-way valve V1, the ninth one-way valve V9 and the tenth one-way valve V10 are opened, the rest of the one-way valves are closed, refrigerant water (namely, primary side second chilled water) circularly flows between the dual-working-condition refrigerating unit 100 and the second heat exchanger 420, secondary side chilled water circularly flows between the water distributor 720, the water collector 710 and the second heat exchanger 420, and the primary side second chilled water and the secondary side chilled water exchange heat in the second heat exchanger 420, so that the dual-working-condition refrigerating unit 100 can provide first cold to the tail end of an air conditioner, namely, the air conditioning system can provide first cold to the tail end of the air conditioner;

working conditions are as follows: air conditioning system cold accumulation

The method comprises the following steps that the dual-working-condition refrigerating unit 100 is started, the ice-making unit 200 is started, the heating unit 500 is closed, the first water pump B1, the second water pump B2 and the third water pump are started, the rest of the water pumps are closed, the second one-way valve V2, the third one-way valve V3 and the fourth one-way valve V4 are opened, the rest of the one-way valves are closed, the dual-working-condition refrigerating unit 100 supplies supercooled water to the ice-making unit 200, the heat preservation tank 300 introduces water in an ice-water mixture to the ice-making unit 200, the ice-water mixture is made by the ice-making unit 200, and then the ice-water mixture enters the heat preservation tank 300 through the third one-way valve V3, so that cold accumulation of an air conditioning system is realized, and liquid water sinks and solid ice flosses float in the heat preservation tank 300;

working conditions are as follows: the air conditioning system provides second cooling capacity to the tail end of the air conditioner

The dual-working-condition refrigerating unit 100, the ice-making unit 200 and the heating unit 500 are all closed, the fourth water pump B4 and the seventh water pump B7 are opened, the other water pumps are closed, the fifth one-way valve V5, the sixth one-way valve V6, the eleventh one-way valve V11 and the twelfth one-way valve V12 are opened, the other one-way valves are closed, liquid water (namely, primary side first chilled water) at the bottom of the heat preservation tank 300 enters the first heat exchanger 410 through the fifth one-way valve V5 and the fourth water pump B4, secondary side chilled water in the water collector 710 enters the first heat exchanger 410 through the eleventh one-way valve V11, and heat is exchanged between the primary side first chilled water and the secondary side chilled water in the first heat exchanger 410, so that the secondary side provides second cold to the air-conditioning tail end, namely, the air-conditioning system provides second cold to the air-conditioning tail end;

working conditions are as follows: the air conditioning system provides first cooling capacity to the tail end of the air conditioner while storing cold

The method comprises the following steps that the dual-working-condition refrigerating unit 100 is started, the ice-making unit 200 is started, the heating unit 500 is closed, the first water pump B1, the second water pump B2, the third water pump B3 and the sixth water pump B6 are started, the rest water pumps are closed, the first one-way valve V1 and the second one-way valve V2 are opened and regulate flow, the third one-way valve V3, the fourth one-way valve V4, the ninth one-way valve V9 and the tenth one-way valve V10 are opened, the rest one-way valves are closed, the dual-working-condition refrigerating unit 100 supplies refrigerant water to the second heat exchanger 420 and also supplies supercooled water to the ice-making unit 200, refrigerant water (namely, primary-side second chilled water) circularly flows between the dual-working-condition refrigerating unit 100 and the second heat exchanger 420, secondary-side chilled water circularly flows between the water distributor 720, the water collector 710 and the second heat exchanger 420, and the primary-side second chilled water exchanges heat with heat in the second heat exchanger 420, and the air-conditioning system is enabled to provide first cold energy to the tail end of an air conditioner; meanwhile, the dual-working-condition refrigerating unit 100 supplies supercooled water to the ice making unit 200, the heat preservation tank 300 introduces water in the ice-water mixture to the ice making unit 200, the ice making unit 200 produces the ice-water mixture, and then the ice-water mixture enters the heat preservation tank 300 through the third one-way valve V3 to realize cold accumulation of the air conditioning system, wherein the distribution amount of the supercooled water supplied to the second heat exchanger 420 and the ice making unit 200 by the dual-working-condition refrigerating unit 100 is realized by controlling the opening degrees of the first one-way valve V1 and the second one-way valve V2;

working condition five: the air conditioning system simultaneously provides first cooling capacity and second cooling capacity for the tail end of the air conditioner

The dual-working-condition refrigerating unit 100 is started, the ice making unit 200 and the heating unit 500 are both closed, the first water pump B1, the second water pump B2, the fourth water pump B4, the sixth water pump B6 and the seventh water pump B7 are opened, the other water pumps are closed, the first one-way valve V1, the fifth one-way valve V5, the ninth one-way valve V9 and the eleventh one-way valve V11 are opened and regulate the flow, the sixth one-way valve V6, the tenth one-way valve V10 and the twelfth one-way valve V12 are opened, the other one-way valves are closed, primary side second chilled water circularly flows between the dual-working-condition refrigerating unit 100 and the second heat exchanger 420, secondary side chilled water circularly flows among the water distributor 720, the water collector 710 and the second heat exchanger 420, the primary side second chilled water and the secondary side chilled water exchange heat in the second heat exchanger 420, and the air conditioning system is enabled to provide first cold for the tail end of the air conditioner; primary side first chilled water circularly flows between the heat preservation tank 300 and the first heat exchanger 410, secondary side chilled water circularly flows between the water distributor 720, the water collector 710 and the first heat exchanger 410, the primary side first chilled water and the secondary side chilled water exchange heat in the first heat exchanger 410, and the air conditioning system is enabled to provide second cold energy to the tail end of the air conditioner, wherein the supply amount of the first cold energy is adjusted by controlling the opening degrees of the first check valve V1 and the ninth check valve V9, and the supply amount of the second cold energy is adjusted by controlling the opening degrees of the fifth check valve V5 and the eleventh check valve V11;

working conditions are as follows: air conditioning system heat storage

The heating unit 500 is started, the dual-working-condition refrigerating unit 100 and the ice-making unit 200 are both closed, the fifth water pump B5 is started, the rest of the water pumps are closed, the seventh one-way valve V7 and the eighth one-way valve V8 are opened, the rest of the one-way valves are closed, water with lower temperature in the heat-insulating tank 300 enters the heating unit 500 through the eighth one-way valve V8 and the fifth water pump B5, the heating unit 500 heats the water with lower temperature, and then hot water is supplemented into the heat-insulating tank 300 through the seventh one-way valve V7 until the water temperature in the heat-insulating tank 300 reaches the preset water temperature, so that heat storage of the air-conditioning system is realized;

a seventh working condition: air conditioning system providing heat to air conditioning terminal

The heating unit 500, the dual-operating-condition refrigerating unit 100 and the ice-making unit 200 are all closed, the fourth water pump B4 and the seventh water pump B7 are opened, the other water pumps are closed, the fifth check valve V5, the sixth check valve V6, the eleventh check valve V11 and the twelfth check valve V12 are opened, the other check valves are closed, hot water stored in the heat-insulating tank 300 circulates between the heat-insulating tank 300 and the first heat exchanger 410 through the fifth check valve V5, the fourth water pump B4 and the sixth check valve V6, secondary side hot medium water circulates between the water collector 710, the first heat exchanger 410 and the water distributor 720 through the eleventh check valve V11, the seventh water pump B7 and the twelfth check valve V12, the hot water and the secondary side hot medium water exchange heat in the first heat exchanger 410, and the hot water in the heat-insulating tank 300 provides heat to the air-conditioning end, that is, the air-conditioning system provides heat to the air-conditioning end.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The air conditioning system is characterized by comprising a double-working-condition refrigerating unit (100), an ice making unit (200), a heat preservation tank (300) and an air conditioning tail end, wherein the double-working-condition refrigerating unit (100) is communicated with the ice making unit (200) in a circulating mode, the double-working-condition refrigerating unit (100) is used for supplying supercooled water to the ice making unit (200), the double-working-condition refrigerating unit (100) is further used for providing first cold energy to the air conditioning tail end, the ice making unit (200) is communicated with the heat preservation tank (300) in a circulating mode, the ice making unit (200) can make the supercooled water into an ice water mixture and supply the ice water mixture to the heat preservation tank (300), the heat preservation tank (300) can store the ice water mixture, and water in the ice water mixture can serve as first chilled water on the primary side to provide second cold energy to the air conditioning tail end.

2. The air conditioning system of claim 1, further comprising a first heat exchanger (410), wherein the primary side first chilled water supplies the second cooling capacity to the air conditioning terminal through the first heat exchanger (410).

3. The air conditioning system of claim 2, wherein the holding tank (300) has a water outlet and a water inlet, the water outlet being in communication with a water return end of the ice maker set (200) and a first water inlet end of the first heat exchanger (410), respectively, and the water inlet being in communication with a water outlet end of the ice maker set (200) and a first water outlet end of the first heat exchanger (410), respectively.

4. Air conditioning system according to claim 3, wherein the water inlet is arranged at the top of the thermal tank (300).

5. The air conditioning system of claim 4, wherein the water inlet comprises a first water inlet and a second water inlet, the first water inlet is communicated with the water outlet end of the ice making unit (200), the second water inlet is communicated with the first water outlet end of the first heat exchanger (410) through a water inlet pipe (320), part of the water inlet pipe (320) is arranged in the heat preservation tank (300), and a spray head (321) is arranged on the water inlet pipe (320).

6. The air conditioning system as claimed in claim 5, wherein the number of the spray heads (321) is plural, and the plural spray heads (321) are uniformly distributed along a circumferential direction or a radial direction of the heat-insulating tank (300).

7. Air conditioning system according to claim 3, characterized in that the water outlet is located at the bottom of the thermal tank (300).

8. The air conditioning system according to any one of claims 2-7, further comprising a heating unit (500), wherein the heating unit (500) is in circulation communication with the thermal insulation tank (300), the heating unit (500) is used for supplying hot water to the thermal insulation tank (300), the thermal insulation tank (300) is further capable of storing the hot water, and the hot water in the thermal insulation tank (300) is capable of providing heat to the air conditioning terminal.

9. The air conditioning system of claim 8, wherein the hot water provides the heat to the air conditioning terminal through the first heat exchanger (410).

10. The air conditioning system as claimed in any one of claims 1-7, further comprising a second heat exchanger (420), wherein the dual mode refrigeration unit (100) is further in circulation communication with the second heat exchanger (420), wherein the dual mode refrigeration unit (100) is further configured to supply chilled water to the second heat exchanger (420), and wherein the chilled water in the second heat exchanger (420) is capable of providing the first cooling capacity to the terminal of the air conditioner as the second chilled water on the primary side.

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