CN112178846A - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN112178846A CN112178846A CN202011013307.7A CN202011013307A CN112178846A CN 112178846 A CN112178846 A CN 112178846A CN 202011013307 A CN202011013307 A CN 202011013307A CN 112178846 A CN112178846 A CN 112178846A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning system and a control method thereof, wherein the air conditioning system comprises an air conditioning tail end, a cold supply host, a cold accumulation and cold supply host, a cold accumulation water tank and an emergency water tank; a first circulating pipeline is connected between the cooling main machine and the tail end of the air conditioner; the cold accumulation and supply host is connected with a second circulating pipeline; a cold accumulation circulating pipeline is connected between the cold accumulation water tank and the cold accumulation and supply host; the cold accumulation water tank is connected with a cold supply circulation pipeline; the emergency water tank is connected with the tail end of the air conditioner in series, or the emergency water tank is connected with the tail end of the air conditioner in parallel. According to the air conditioning system and the control method thereof disclosed by the invention, the special emergency water tank is arranged, so that emergency cold supply can be carried out when the cold supply host and the cold accumulation and cold supply host can not supply cold, the peak shifting and valley filling mode can be adopted to save electricity charge by arranging the cold accumulation water tank, the cold supply requirement of the air conditioning system can be met, and the safety requirement when the cold supply host and the cold accumulation and cold supply host can not supply cold can also be met.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system and a control method thereof.
Background
A grade A data center adopting the chilled water air conditioning system is provided with a cold accumulation facility, and the cold accumulation time meets the operation requirement of the electronic information equipment. The time for the cold storage facility to supply chilled water is not less than the power supply time of the uninterrupted power supply equipment. At present, a data center is provided with a cold accumulation water tank, and the cold accumulation water tank is also used as an emergency water tank. The cold storage capacity of the emergency water tank is required to be enough to supply cold for 10-20 minutes when the emergency of mains supply power failure occurs.
The cold accumulation water tank is also used as an emergency water tank, occupies partial volume of the cold accumulation water tank, and reduces the electricity charge saved by peak shifting and valley filling of the cold accumulation water tank. When the cold storage water tank is used for emergency cold supply, the valve is required to be switched, and once the valve fails, cold supply failure can be caused.
Disclosure of Invention
The invention aims to provide an air conditioning system capable of improving system safety and a control method thereof.
The technical scheme of the invention provides an air conditioning system, which comprises an air conditioning tail end, at least one cold supply host, at least one cold accumulation and cold supply host, at least one cold accumulation water tank and at least one emergency water tank, wherein the cold accumulation and cold supply host is connected with the air conditioning tail end;
a first circulating pipeline is connected between the cooling main machine and the tail end of the air conditioner, and a first water pump is arranged on the first circulating pipeline;
the cold accumulation and supply host is connected with a second circulation pipeline capable of supplying cold to the tail end of the air conditioner, and a second water pump is arranged on the second circulation pipeline;
a cold accumulation circulating pipeline is connected between the cold accumulation water tank and the cold accumulation and supply host;
a cold supply circulating pipeline capable of supplying cold to the tail end of the air conditioner is connected to the cold accumulation water tank;
the emergency water tank is connected with the tail end of the air conditioner in series, or,
the emergency water tank is connected with the tail end of the air conditioner in parallel, and a fifth water pump is arranged on a pipeline between the water outlet end of the emergency water tank and the water inlet end of the tail end of the air conditioner.
In one optional technical scheme, a third water pump is arranged on the cold accumulation circulating pipeline, and a first bypass pipeline connected with the third water pump in parallel is optionally arranged on the cold accumulation circulating pipeline;
and a fourth water pump is arranged on the cooling circulation pipeline, and a second bypass pipeline connected with the fourth water pump in parallel is selectively arranged on the cooling circulation pipeline.
In one optional technical scheme, the system comprises more than two cold accumulation and supply hosts;
the second circulating pipeline is connected between each cold accumulation and supply host and the tail end of the air conditioner;
any two adjacent cold accumulation and supply main machines are connected in series or in parallel.
In one optional technical scheme, two ends of the cold accumulation and supply host are respectively provided with a double safety valve capable of isolating the cold accumulation circulation pipeline and a pipeline at the tail end of the air conditioner;
when the cold accumulation water tank accumulates cold through the cold accumulation and cold supply host, the double safety valves are closed.
In one optional technical scheme, a first heat exchanger is connected to the cold supply circulation pipeline;
the cold accumulation water tank supplies cold to the tail end of the air conditioner through the first heat exchanger.
In one optional technical scheme, a second heat exchanger is connected to the second circulation pipeline, and the cooling circulation pipeline is communicated with the second heat exchanger;
the cold storage and supply host can supply cold to the tail end of the air conditioner through the second heat exchanger;
the cold accumulation water tank can supply cold to the tail end of the air conditioner through the second heat exchanger.
In one optional technical scheme, the water inlet end and the water outlet end of the cold accumulation water tank are respectively provided with a pressure monitoring device, and the water outlet end of the cold accumulation water tank is provided with an electric valve.
In one optional technical scheme, the air conditioning system comprises a controller;
a temperature monitoring device is arranged at the water inlet end of the cold accumulation and supply host;
the temperature monitoring device and the electric valve are respectively in signal connection with the controller.
In one optional technical scheme, a first temperature sensor is arranged in the cold accumulation water tank, a second temperature sensor is arranged in the emergency water tank, and a third temperature sensor is arranged on the cold supply circulation pipeline;
the first temperature sensor, the second temperature sensor and the third temperature sensor are respectively in signal connection with the controller.
In one optional technical scheme, the air conditioning system comprises a cooling water supply system;
the cooling water supply system supplies cooling to the emergency water tank and/or the air conditioning terminal through a third heat exchanger.
The technical scheme of the invention also provides a control method of the air conditioning system, which comprises the following steps:
the cooling host supplies cooling to the tail end of the air conditioner;
the cold accumulation and supply host machine accumulates cold to the cold accumulation water tank;
the cold accumulation and supply host and/or the cold accumulation water tank supply cold to the tail end of the air conditioner;
when the cooling main machine can not supply cooling, the emergency water tank supplies cooling to the tail end of the air conditioner and/or the cold storage water tank supplies cooling to the tail end of the air conditioner.
In one optional technical scheme, the control method of the air conditioning system further comprises the following steps:
the cold accumulation water tank supplies cold to the tail end of the air conditioner through the first heat exchanger.
In one optional technical scheme, the control method of the air conditioning system further comprises the following steps:
the cold storage and supply host supplies cold to the tail end of the air conditioner through a second heat exchanger;
the cold accumulation water tank supplies cold to the tail end of the air conditioner through the second heat exchanger.
In one optional technical scheme, the control method of the air conditioning system further comprises the following steps:
when the cold accumulation water tank accumulates cold, the double safety valves at the two ends of the cold accumulation and supply host machine are closed, and the cold accumulation circulation pipeline is kept disconnected with the pipeline at the tail end of the air conditioner.
In one optional technical scheme, the control method of the air conditioning system further comprises the following steps:
when the cold accumulation water tank discharges cold, the controller in the air conditioning system can control the opening and closing of the cold supply host and/or the cold accumulation and cold supply host according to the water temperature and control the opening of the electric valve according to the water temperature.
In one optional technical scheme, the control method of the air conditioning system further comprises, when the cold storage water tank is used for cold storage or cold release:
when the pressure monitored by the pressure monitoring devices at the two ends of the cold accumulation water tank conforms to the safety range, the cold accumulation water tank starts to accumulate or discharge cold.
By adopting the technical scheme, the method has the following beneficial effects:
according to the air conditioning system and the control method thereof provided by the invention, the special emergency water tank is arranged, the emergency water tank is an emergency cold source, emergency cold supply can be carried out when the cold supply host and the cold accumulation and cold supply host can not supply cold, the peak shifting and valley filling mode can be adopted to save electricity charges by arranging the cold accumulation water tank, the cold supply requirement of the air conditioning system can be met, and the safety requirement when the cold supply host and the cold accumulation and cold supply host can not supply cold can also be met.
According to the air conditioning system and the control method thereof provided by the invention, the double safety valves are arranged at the two ends of the cold accumulation and supply main machine, the double safety valves are closed during cold accumulation, the cold accumulation and supply main machine is communicated with the cold accumulation circulating pipeline, and the double safety valves disconnect the cold accumulation circulating pipeline from the pipeline at the tail end of the air conditioner, so that water in the pipeline at the tail end of the air conditioner can be prevented from flowing back into the cold accumulation water tank through the cold accumulation circulating pipeline, and the safety of the air conditioning system is improved.
According to the air conditioning system and the control method thereof provided by the invention, the first heat exchanger is connected on the cold supply circulating pipeline, and the cold accumulation water tank can supply cold to the tail end of the air conditioner through the first heat exchanger, so that water in the pipeline at the tail end of the air conditioner can be prevented from flowing back to the cold accumulation water tank through the cold supply circulating pipeline, and the safety of the air conditioning system is effectively improved.
According to the air conditioning system and the control method thereof provided by the invention, the pressure monitoring devices are respectively arranged at the water inlet end and the water outlet end of the cold accumulation water tank, when the cold accumulation water tank accumulates or discharges cold, the numerical value of the pressure monitoring device is observed firstly, and only when the pressure monitored by the pressure monitoring device accords with the safety range, the cold accumulation or the cold discharge of the cold accumulation water tank is started, so that the safety of the air conditioning system is further improved.
According to the air conditioning system and the control method thereof provided by the invention, the second heat exchanger is connected on the second circulating pipeline, the cold accumulation and supply host can supply cold to the tail end of the air conditioner through the second heat exchanger, so that the water path of the cold accumulation and supply host is isolated from the water path at the tail end of the air conditioner, the cold accumulation water tank can supply cold to the tail end of the air conditioner through the second heat exchanger, water in the pipeline at the tail end of the air conditioner can be prevented from flowing back to the cold accumulation water tank through the cold supply circulating pipeline, and the safety of the air conditioning system is effectively improved.
Drawings
Fig. 1 is a schematic view of an air conditioning system according to a first embodiment of the present invention;
fig. 2 is a schematic view of an air conditioning system according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of an air conditioning system according to a third embodiment of the present invention;
FIG. 4 is a schematic diagram of an air conditioning system according to a fourth embodiment of the present invention;
fig. 5 is a schematic view of an air conditioning system according to a fifth embodiment of the present invention;
fig. 6 is a schematic view of an air conditioning system according to a sixth embodiment of the present invention;
FIG. 7 is a schematic view of a cold storage water tank with pressure monitoring devices and electrically operated valves at both ends;
FIG. 8 is a schematic view of a dual safety valve;
fig. 9 is a schematic diagram of the first temperature sensor, the second temperature sensor, the third temperature sensor, and the electrically operated valve electrically connected to the controller, respectively.
In the figure:
1: an air conditioner terminal; 11: a water inlet end; 12: a water outlet end;
13: a first connecting pipe; 14: a sixth water pump; 15: a fourth temperature sensor;
2: a cooling main machine; 21: a first circulation line; 22: a first water pump;
23: a standby pipeline;
3: a cold accumulation and supply host; 31: a second circulation line; 32: a second water pump;
33: the host is connected with the pipeline in series; 34: a host bypass pipeline; 35: a second heat exchanger;
351: a water inlet end; 352: a water outlet end; 36: a double safety valve;
4: a cold accumulation water tank; 4-1: an upper water distributor; 4-2: a lower water distributor;
40: a first temperature sensor; 41: a cold accumulation circulation pipeline; 411: a hot water outlet pipeline;
412: a cold water return line; 42: a cooling circulation line; 421: a cold water outlet pipeline;
422: a hot water return line; 43: a third water pump; 44: a fourth water pump;
45: a first bypass line; 46: a second bypass line; 47-third temperature sensor;
48: an electrically operated valve; 49: a pressure monitoring device;
5: an emergency water tank; 5-1: an upper water distributor; 5-2: a lower water distributor;
50: a second temperature sensor; 51: a second connecting pipe; 52: a third connecting pipe;
53: a fifth water pump;
6: a cooling water supply system; 61: a third heat exchanger; 62: a fourth connecting pipe;
63: a fifth connecting pipe;
7: a first heat exchanger; 71: a water inlet end; 72: a water outlet end;
8: and a controller.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 to 6, an air conditioning system according to an embodiment of the present invention includes an air conditioning terminal 1, at least one cooling main unit 2, at least one cold storage and cooling main unit 3, at least one cold storage water tank 4, and at least one emergency water tank 5.
A first circulation pipeline 21 is connected between the cooling main machine 2 and the air conditioner terminal 1, and a first water pump 22 is arranged on the first circulation pipeline 21.
The cold storage and supply main unit 3 is connected to a second circulation pipeline 31 capable of supplying cold to the air conditioner terminal 1, and a second water pump 32 is provided on the second circulation pipeline 31.
A cold accumulation circulation pipeline 41 is connected between the cold accumulation water tank 4 and the cold accumulation and supply main machine 3. A cooling circulation line 42 capable of supplying cooling to the air conditioning terminal 1 is connected to the cold storage water tank 4.
The emergency water tank 5 is connected with the tail end 1 of the air conditioner in series. Or, the emergency water tank 5 is connected in parallel with the air conditioner terminal 1, and a fifth water pump 53 is arranged on a pipeline between the water outlet end of the emergency water tank 5 and the water inlet end 11 of the air conditioner terminal 1.
The air conditioning system provided by the embodiment of the invention can be used in general places and can also be used in A-level data centers.
The embodiment of the invention provides an air conditioning system, which comprises: the air conditioner comprises an air conditioner tail end 1, at least one cold supply host machine 2, at least one cold accumulation and cold supply host machine 3, at least one cold accumulation water tank 4 and at least one emergency water tank 5.
The air conditioner terminal 1 is a cooling side of the air conditioner for cooling a user or a place.
The cooling main machine 2 is a refrigeration main machine for cooling the air conditioner terminal 1.
The cold accumulation and cold supply host 3 is a refrigeration host which can supply cold to the air conditioner tail end 1 and can also supply cold to the cold accumulation water tank 4.
The cold storage water tank 4 is a container for storing cold for storing water, and may be a water tank or a water tank. The cold accumulation water tank 4 can supply cold to the air conditioner terminal 1, can supply cold to the air conditioner terminal 1 in a normal state, and can also supply cold to the air conditioner terminal 1 in an emergency.
The emergency water tank 5 is a container for supplying cold to the air conditioner terminal 1 when the cold supply main machine 2 and the cold accumulation cold supply main machine 3 can not supply cold, and can be a water tank or a water tank.
It should be noted that: each pipeline or pipeline can be provided with a valve to control the on-off of the water path according to the requirement, and the valves are not indicated one by one.
The specific connection relationship of each part is as follows:
a first circulation pipeline 21 is connected between the cooling main machine 2 and the air conditioner terminal 1, the first circulation pipeline 21 may include a plurality of water pipes, a part of the first circulation pipeline 21 is connected between the water outlet end of the cooling main machine 2 and the water inlet end 11 of the air conditioner terminal 1, and a part of the first circulation pipeline 21 is connected between the water inlet end of the cooling main machine 2 and the water outlet end 12 of the air conditioner terminal 1, so as to form a circulating water path.
The first circulation pipeline 21 is provided with a first water pump 22 for providing power for water circulation in the first circulation pipeline 21.
The cold storage and supply main unit 3 is connected to a second circulation line 31 capable of supplying cold to the air conditioning terminal 1. The second circulation line 31 may include a plurality of water pipes.
The second circulation line 31 may be connected in such a manner that: a part of the second circulation pipeline 31 is connected between the water outlet end of the cold storage and cooling host machine 3 and the water inlet end 11 of the air conditioner terminal 1, and a part of the second circulation pipeline 31 is connected between the water inlet end of the cold storage and cooling host machine 3 and the water outlet end 12 of the air conditioner terminal 1, so as to form a circulating water path.
The second circulation line 31 may be connected in the following manner: the second circulation line 31 is connected to the first circulation line 21. Water can circulate between the cold storage and supply main machine 3 and the air conditioning terminal 1 through the second circulation pipeline 31 and the first circulation pipeline 21.
The concrete connection mode of each pipeline or pipeline can be connected according to actual need to realize the circulation of water route.
The second circulation line 31 may be connected in the following manner: a heat exchanger is arranged on the second circulation pipeline 31, and heat exchange is carried out between the second circulation pipeline and a water channel at the tail end 1 of the air conditioner through the heat exchanger.
The concrete connection mode of each pipeline or pipeline can be connected according to actual need to realize the circulation of water route circulation, as long as can realize that second circulation pipeline 31 can be to the terminal 1 cooling of air conditioner.
The second circulation pipe 31 is provided with a second water pump 32 for providing power for the water circulation in the second circulation pipe 31.
The cold accumulation water tank 4 comprises an upper water distributor 4-1 and a lower water distributor 4-2.
The cold accumulation circulation pipeline 41 is connected between the cold accumulation water tank 4 and the cold accumulation and supply host machine 3 to realize cold accumulation for the cold accumulation water tank 4 through the cold accumulation and supply host machine 3. The cold accumulation circulation pipeline 41 comprises a hot water outlet pipeline 411 and a cold water return pipeline 412, the hot water outlet pipeline 411 is connected between the upper water distributor 4-1 and the water inlet end of the cold accumulation and supply main machine 3, and the cold water return pipeline 412 is connected between the lower water distributor 4-2 and the water outlet end of the cold accumulation and supply main machine 3.
When the cold storage and supply host 3 is used for storing cold in the cold storage water tank 4, the hot water above the cold storage water tank 4 enters the cold storage and supply host 3 through the hot water outlet pipeline 411 for refrigeration, and the cold water returns to the cold storage water tank 4 through the cold water return pipeline 412.
The cooling circulation line 42 is connected between the cold storage water tank 4 and the air conditioning terminal 1, and is used for cooling the air conditioning terminal 1.
The cooling circulation pipeline 42 may be directly connected to the air conditioner terminal 1, or may be connected to the air conditioner terminal 1 through the first circulation pipeline 21, the second circulation pipeline 31, and the heat exchanger, as long as the cooling circulation pipeline 42 can supply cooling to the air conditioner terminal 1. The cooling circulation line 42 includes a cold water outlet line 421 and a hot water return line 422. The cold water outlet line 421 is connected to the lower water distributor 4-2 for supplying cold water. The hot water return pipeline 422 is connected with the upper water distributor 4-1 and is used for hot water return after heat exchange at the air conditioner terminal 1.
It should be noted that: the water inlet end in the invention refers to one side of water inlet, and can be a water inlet port, a water inlet pipeline or a water inlet pipeline. The water outlet end in the invention refers to one side of the water outlet, and can be a water outlet port, a water outlet pipeline or a water outlet pipeline. The water inlet end and the water outlet end of the cold accumulation water tank 4 are not fixed and are only relative concepts, and can be mutually converted. For example, when the cold storage water tank 4 stores cold, the hot water outlet line 411 connected to the upper water distributor 4-1 is the water outlet end, and the cold water return line 412 connected to the lower water distributor 4-2 is the water inlet end. When the cold accumulation water tank 4 supplies cold, the cold water outlet pipeline 421 connected with the lower water distributor 4-2 is a water outlet end, and the hot water return pipeline 422 connected with the upper water distributor 4-1 is a water inlet end.
The emergency water tank 5 comprises an upper water distributor 5-1 and a lower water distributor 5-2, and the emergency water tank 5 can be connected with the air conditioner tail end 1 in series or in parallel.
In the air conditioning system shown in fig. 1, 3 and 5, an emergency water tank 5 is connected in series with an air conditioning terminal 1. In the air conditioning system shown in fig. 2, 4 and 6, the emergency water tank 5 is connected in parallel with the air conditioning terminal 1.
When the emergency water tank 5 is connected with the tail end 1 of the air conditioner in series, an upper water distributor 5-1 and a lower water distributor 5-2 of the emergency water tank 5 are respectively connected with the first circulating pipeline 21. The water can be supplied to the emergency water tank 5 from the upper water distributor 5-1 and then supplied to the air-conditioning tail end 1 through the lower water distributor 5-2, or the water can be supplied to the emergency water tank 5 from the lower water distributor 5-2 and then supplied to the air-conditioning tail end 1 through the upper water distributor 5-1.
When the emergency water tank 5 is connected in parallel with the air conditioner terminal 1, the upper water distributor 5-1/the lower water distributor 5-2 of the emergency water tank 5 can be connected with the water inlet end 11 of the air conditioner terminal 1 through the second connecting pipeline 51 and the first circulating pipeline 21, and the lower water distributor 5-2/the upper water distributor 5-1 of the emergency water tank 5 can be connected with the water outlet end 12 of the air conditioner terminal 1 through the third connecting pipeline 52. And a fifth water pump 53 is arranged on the first circulating pipeline 21 between the water outlet end of the emergency water tank 5 and the water inlet end 11 of the air conditioner tail end 1 to provide power for the waterway circulation of the emergency water tank 5 connected in parallel.
When the emergency water tank 5 is connected with the tail end 1 of the air conditioner in series:
the cold water in the cooling main machine 2 can supply cold to the air conditioner terminal 1 through the first circulating pipeline 21 and the emergency water tank 5. In this process, it is ensured that cold water is constantly stored in the emergency water tank 5.
The cold water of the cold accumulation and supply host machine 3 can supply cold to the air conditioner terminal 1 after passing through the second circulation pipeline 31 and the emergency water tank 5. In this process, it is ensured that cold water is constantly stored in the emergency water tank 5.
The cold water in the cold accumulation water tank 4 can supply cold to the air conditioner terminal 1 after passing through the cold supply circulation pipeline 42 and the emergency water tank 5. In this process, it is ensured that cold water is constantly stored in the emergency water tank 5.
When the emergency water tank 5 is connected with the air conditioner tail end 1 in series, a standby pipeline 23 is connected between the water inlet end 11 of the air conditioner tail end 1 and the first circulating pipeline 21, and a valve is arranged on the standby pipeline 23. The standby pipe 23 is connected in parallel with the emergency water tank 5. When the emergency water tank 5 needs to be overhauled, the valve on the water inlet end side of the emergency water tank 5 is closed, the valve on the standby pipeline 23 is opened, and cold water in the cooling main machine 2, the cold accumulation cooling main machine 3 and the cold accumulation water tank 4 can supply cold to the air conditioner tail end 1 through the standby pipeline 23.
When the emergency water tank 5 is connected with the air conditioner tail end 1 in parallel:
most of cold water of the cooling main machine 2 is cooled to the air conditioning terminal 1 through the first circulation line 21. Meanwhile, a small part of cold water in the cold supply main machine 2 is stored in the emergency water tank 5 through the first circulation pipeline 21 and the second connecting pipeline 51.
The cold accumulation and supply host machine 3 can directly supply cold to the air conditioner terminal 1 through the second circulation pipeline 31, and cold water in the cold accumulation and supply host machine 3 can also supply cold to the air conditioner terminal 1 through the second circulation pipeline 31 and the emergency water tank 5.
The cold-storage water tank 4 can directly supply cold to the air-conditioning terminal 1 through the cold-supply circulation line 42. The cold water in the cold accumulation water tank 4 can also pass through the emergency water tank 5 and then supply cold to the air conditioner tail end 1.
When the cooling host 2 and the cold accumulation cooling host 3 can not supply cold, the emergency water tank 5 has the following specific emergency cooling modes:
firstly, the method comprises the following steps: when the emergency water tank 5 is connected with the air conditioner tail end 1 in series, the first water pump 22 is started, cold water in the emergency water tank 5 supplies cold to the air conditioner tail end 1 through the first circulating pipeline 21, and hot water after heat exchange returns to the emergency water tank 5 after passing through the first circulating pipeline 21, the first water pump 22 and the cooling host 2.
II, secondly: when the emergency water tank 5 is connected with the air conditioner terminal 1 in parallel, the fifth water pump 53 is started, cold water in the emergency water tank 5 supplies cold to the air conditioner terminal 1 through the second connecting pipeline 51, the first circulating pipeline 21 and the fifth water pump 53, and hot water after heat exchange returns to the emergency water tank 5 through the third connecting pipeline 52.
The above-mentioned operation mode can be realized only by opening or closing the valves on the pipelines correspondingly.
Therefore, according to the air conditioning system provided by the invention, the special emergency water tank 5 is arranged, the emergency water tank 5 is an emergency cold source, the emergency water tank 5 can be used for emergency cold supply to the air conditioning terminal 1 when the cold supply host 2 and the cold accumulation cold supply host 3 cannot supply cold, the cold accumulation water tank 4 is arranged to save electricity charges in a peak shifting and valley filling mode, the cold supply requirement of the air conditioning system can be met, and the safety requirement when the cold supply host 2 and the cold accumulation cold supply host 3 cannot supply cold can also be met.
The water level of the cold storage water tank 4 in the air conditioning system shown in fig. 1-2 is higher than the water level of the highest point of the air conditioning terminal 1, and the cold storage water tank 4 serves as a constant pressure point of the air conditioning system.
In one embodiment, as shown in fig. 1 to 6, a third water pump 43 is provided on the cold storage circulation line 41. A first bypass line 45 connected in parallel to the third water pump 43 is optionally provided to the cold storage circulation line 41.
The cooling circulation line 42 is provided with a fourth water pump 44. A second bypass line 46 is optionally provided in parallel with the fourth water pump 44 on the cooling circulation line 42.
In this embodiment, the first bypass line 45 and the second bypass line 46 may be selectively provided or not provided as needed.
The third water pump 43 may be disposed on the hot water outlet pipe 411, and both ends of the first bypass pipe 45 are disposed at both sides of the third water pump 43, and the first bypass pipe 45 is connected in parallel with the third water pump 43. When cold accumulation is performed, if the third water pump 43 is needed, the valve of the first bypass pipeline 45 is closed, and the third water pump 43 provides power for the water in the cold accumulation circulating pipeline 41. When cold accumulation is performed, if the second water pump 32 is used for providing power for the water in the cold accumulation circulation pipeline 41, the valve of the first bypass pipeline 45 is opened, and the third water pump 43 is closed.
The fourth water pump 44 may be disposed on the cold water outlet line 421, two ends of the second bypass line 46 are disposed on two sides of the fourth water pump 44, and the second bypass line 46 is connected in parallel with the fourth water pump 44. If the fourth water pump 44 is used during cold supply, the valve of the second bypass line 46 is closed, and the fourth water pump 44 powers the water in the cold supply circulation line 42. When the cold storage water tank 4 is close to the air conditioner end 1 during cold supply, the fourth water pump 44 is not needed, and then the valve of the second bypass pipeline 46 is opened, and the fourth water pump 44 is closed.
In one embodiment, as shown in fig. 1-6, the air conditioning system includes more than two cold storage and supply hosts 3. A second circulation pipeline 31 is respectively connected between each cold accumulation and supply host 3 and the air conditioner tail end 1. Any two adjacent cold accumulation and supply main machines 3 are connected in series or in parallel.
Two adjacent cold accumulation and supply main machines 3 can be connected in series through a main machine series pipeline 33. The second circulation pipeline 31 is provided with a host bypass pipeline 34 connected with the cold accumulation and supply host 3 in parallel.
In the air conditioning system provided by the embodiment, a user can select more than two cold accumulation and cold supply hosts 3 to supply cold/accumulate in series or in parallel according to needs so as to meet the needs of various working conditions and the cold supply needs of large temperature difference of a data center, so that the temperature difference between the cold discharge temperature and the cold accumulation temperature of the cold accumulation water tank 4 is more than or equal to 8 ℃.
In one embodiment, as shown in fig. 5-6 and 8, two safety valves 36 capable of isolating the cold storage circulation pipeline 41 and the air conditioning terminal 1 are respectively arranged at two ends of the cold storage and supply host machine 3.
Wherein, when the cold accumulation water tank 4 accumulates cold through the cold accumulation and supply host machine 3, the double safety valves 36 are closed.
The double safety valve 36 includes two safety valves 361 provided on the second circulation line 31 at both ends of the cold storage and supply main unit 3. The connection point of the hot water outlet pipe 411 and the second circulation pipe 31 is located between the water inlet of the cold storage and supply main machine 3 and the double safety valves 36 on the side. The connection point of the cold water return pipeline 412 and the second circulation pipeline 31 is positioned between the water outlet of the cold storage and supply host machine 3 and the double safety valves 36 on the side.
In the air conditioning system provided by the embodiment, when the cold accumulation water tank 4 accumulates cold through the cold accumulation and supply host 3, the double safety valves 36 on both sides are closed, so that the cold accumulation circulation pipeline 41 and the water channel of the air conditioning terminal 1 can be cut off, water in the pipeline of the air conditioning terminal 1 can be prevented from flowing back to the cold accumulation water tank 4 through the cold accumulation circulation pipeline 41, and the safety of the air conditioning system is improved.
In one embodiment, as shown in fig. 5-6, a first heat exchanger 7 is connected to the cooling circulation line 42. The cold storage water tank 4 supplies cold to the air conditioning terminal 1 through the first heat exchanger 7.
The cold water outlet line 421 is connected between the lower water distributor 4-2 and the water inlet end 71 of the first heat exchanger 7, and the hot water return line 422 is connected between the upper water distributor 4-1 and the water outlet end 72 of the first heat exchanger 7.
The first connecting duct 13 of the air conditioning terminal 1 passes through the first heat exchanger 7. The first connection pipe 13 is provided with a sixth water pump 14 and a fourth temperature sensor 15. The sixth water pump 14 is used to power the circulation of water and the fourth temperature sensor 15 is used to monitor the temperature of the water in the first connection pipe 13.
In the air conditioning system provided by this embodiment, when the cold storage water tank 4 supplies cold, cold water in the cold storage water tank 4 enters the first heat exchanger 7 through the cold water outlet pipeline 421, and then exchanges heat with hot water in the first connection pipeline 13, the hot water in the first connection pipeline 13 is cooled to become cold water, and then the cold water can enter the air conditioner terminal 1 through the first circulation pipeline 21 for cooling, and meanwhile, cold water entering through the cold water outlet pipeline 421 becomes hot water, and then returns to the cold storage water tank 4 through the hot water return pipeline 422. Therefore, the cold accumulation water tank 4 can supply cold to the air conditioner terminal 1 through the first heat exchanger 7, so that water in the pipeline of the air conditioner terminal 1 can be prevented from flowing back to the cold accumulation water tank 4 through the cold supply circulation pipeline 42, and the safety of the air conditioning system is effectively improved.
In one embodiment, as shown in fig. 3-4, a second heat exchanger 35 is connected to the second circulation line 31, and the cooling circulation line 42 is in communication with the second heat exchanger 35.
The cold storage and supply host machine 3 can supply cold to the air conditioner terminal 1 through the second heat exchanger 35.
The cold storage water tank 4 can supply cold to the air conditioning terminal 1 through the second heat exchanger 35.
The first connecting duct 13 of the air conditioning terminal 1 passes through the second heat exchanger 35. The first connection pipe 13 is provided with a sixth water pump 14 and a fourth temperature sensor 15. The sixth water pump 14 is used to power the circulation of water and the fourth temperature sensor 15 is used to monitor the temperature of the water in the first connection pipe 13.
The water outlet end of the cold accumulation and supply host machine 3 is connected with the water inlet end 351 of the second heat exchanger 35, and the water inlet end of the cold accumulation and supply host machine 3 is connected with the water outlet end 352 of the second heat exchanger 35. When the cold storage and supply host 3 supplies cold, cold water enters the second heat exchanger 35 from the water inlet end 351 and then exchanges heat with hot water in the first connecting pipeline 13, and the cold storage and supply host 3 can supply cold to the air conditioner end 1 through the second heat exchanger 35.
The cold water outlet line 421 is connected between the lower water distributor 4-2 and the water inlet end 351 of the second heat exchanger 35, and the hot water return line 422 is connected between the upper water distributor 4-1 and the water outlet end 352 of the second heat exchanger 35. When the cold storage water tank 4 supplies cold, cold water enters the second heat exchanger 35 from the water inlet end 351 and then exchanges heat with hot water in the first connecting pipeline 13, and the cold storage water tank 4 can supply cold to the air conditioner terminal 1 through the second heat exchanger 35.
The air conditioning system that this embodiment provided, through be connected with second heat exchanger 35 on second circulation pipeline 31, cold-storage cooling host 3 can supply cold to air conditioner end 1 through second heat exchanger 35, the water route that has realized cold-storage cooling host 3 is kept apart with the water route of air conditioner end 1, cold-storage basin 4 also can supply cold to air conditioner end 1 through second heat exchanger 35, can avoid the water in the pipeline of air conditioner end 1 to flow back to cold-storage basin 4 through cooling circulation pipeline 42, air conditioning system's security has effectively been improved.
In one embodiment, as shown in fig. 3-7, the water inlet end and the water outlet end of the cold storage water tank 4 are respectively provided with a pressure monitoring device 49, and the water outlet end of the cold storage water tank 4 is provided with an electric valve 48.
The air conditioning system provided by the embodiment observes the numerical value of the pressure monitoring device 49 firstly when the cold accumulation water tank 4 accumulates or discharges cold, and only when the pressure monitored by the pressure monitoring device 49 meets the safety range, the electric valve 48 is opened to accumulate or discharge cold of the cold accumulation water tank 4, so that the safety of the air conditioning system is further improved.
In one embodiment, as shown in fig. 3-9, the air conditioning system further includes a controller 8.
The water inlet end of the cold accumulation and supply host machine 3 is provided with a temperature monitoring device.
The temperature monitoring device and the electric valve 48 are respectively connected with the controller 8 through signals.
The controller 8 may be a chip or a CPU, which may implement automatic control. The controller 8 is in signal connection with the cooling main machine 2 and the cold accumulation and cooling main machine 3 and can control the automatic switch of the cooling main machine 2 and the cold accumulation and cooling main machine 3.
The temperature monitoring device is a temperature sensor which is arranged on a water inlet pipe of the cold accumulation and supply host machine 3.
In the air conditioning system provided in this embodiment, when the cold storage water tank 4 stores cold through the cold storage and supply host 3, if the temperature monitoring device monitors that the temperature of the water entering the cold storage and supply host 3 is substantially the same as the temperature of the water in the hot water outlet pipeline 411 or the temperature difference is smaller than the preset value, the controller 8 automatically turns off the cold storage and supply host 3 to stop storing cold.
In the case of the air conditioning system shown in fig. 1-2, the cold storage water tank 4 serves as a constant pressure point of the air conditioning system. When the cold accumulation water tank 4 begins to cool, the cold accumulation and supply host machine 3 is started first, and cold water passes through the cold accumulation and supply host machine 3. When the temperature monitoring device at the water inlet end of the cold accumulation and supply host 3 monitors that the temperature of the water entering the cold accumulation and supply host 3 reaches the first temperature value (for example, the temperature of the water required by the air conditioner terminal 1 is 4 ℃, and the first temperature value is 4.5 ℃), the cold accumulation and supply host 3 is closed, and the valve on the host bypass pipeline 34 is opened, so that the cold water does not pass through the cold accumulation and supply host 3, and the temperature fluctuation of the cold water supplying the air conditioner terminal 1 is small.
When the cold storage water tank 4 finishes discharging cold, the temperature monitoring device monitors that the temperature of cold water discharged from the cold storage water tank 4 reaches a second temperature value (for example, the water temperature is 5 ℃), which indicates that the cold quantity in the cold storage water tank 4 is discharged quickly, the valve on the host bypass pipeline 34 is closed, water enters the cold storage and supply host 3, the cold storage and supply host 3 is started, when the load of the cold storage and supply host 3 reaches a preset range (for example, the preset range refers to 60-70% of the load of the cold storage and supply host 3), which indicates that the temperature of cold water supplied to the air conditioner terminal 1 by the cold storage and supply host 3 meets the requirement, the cold discharge is finished, the cold water supplied to the air conditioner terminal 1 is supplied by the cold storage and supply host 3 completely, and the temperature fluctuation of the cold water supplied to.
In one embodiment, as shown in fig. 1-2, 5 and 9, a first temperature sensor 40 is disposed in the cold storage water tank 4, a second temperature sensor 50 is disposed in the emergency water tank 5, and a third temperature sensor 47 is disposed on the cooling circulation line 42.
The first temperature sensor 40, the second temperature sensor 50 and the third temperature sensor 47 are in signal connection with the controller 8, respectively.
The air conditioning system provided in the present embodiment may control the on/off of the cooling main unit 2 and/or the cooling main unit 3 according to the temperature signal of the first temperature sensor 40 in the cold storage water tank 4 and control the opening degree of the electric valve 48 according to the temperature signal of the third temperature sensor 47 when the cold storage water tank 4 is cooled down.
For example, when the first temperature sensor 40 detects that the temperature of the bottom water in the cold storage water tank 4 is lower than a first preset value (for example, the temperature of the water is less than or equal to 5 ℃), the controller 8 controls the cooling main machine 2 and the cold storage cooling main machine 3 to be closed, and the cooling demand of the air conditioner terminal 1 can be met only by the supply of cold energy in the cold storage water tank 4.
When the first temperature sensor 40 monitors that the water temperature of the bottom layer water in the cold accumulation water tank 4 is within a second preset value range (for example, the water temperature is more than 5 ℃ and less than or equal to 6 ℃), the controller 8 can control the cooling main machine 2 and/or the cold accumulation and cooling main machine 3 to be started, and control the cooling main machine 2 and/or the cold accumulation and cooling main machine 3 and the cold accumulation water tank 4 to simultaneously supply cold to the tail end of the air conditioner.
When the first temperature sensor 40 detects that the temperature of the bottom water in the cold storage water tank 4 is higher than a third preset value (for example, the temperature of the water is higher than 6 ℃), the controller 8 can control the cooling main unit 2 and/or the cold storage cooling main unit 3 to be opened, the electric valves 48 at the two ends of the cold storage water tank 4 to be closed, and the cooling main unit 2 and/or the cold storage cooling main unit 3 to supply cold to the tail end of the air conditioner.
By the arrangement, water temperature fluctuation of the cold accumulation water tank 4 in the processes of starting and ending cold release and in the process of starting cold supply of the cold supply main machine 2 and/or the cold accumulation and cold supply main machine 3 can be reduced.
In the air conditioning system provided in this embodiment, when the cold storage water tank 4 stores cold, and when the first temperature sensor 40 monitors that the temperature of the upper layer water in the cold storage water tank 4 reaches the fourth preset value (for example, the water temperature is less than or equal to 5 ℃), the controller 8 controls the cold storage and supply host 3 to be turned off, and cold storage is completed. At this time, the first temperature sensor 40 disposed on the upper portion of the cold storage water tank 4 and the temperature monitoring device disposed on the water inlet end of the cold storage and supply host 3 may work simultaneously, and no matter the temperature monitoring device or the first temperature sensor 40 disposed on the upper portion of the cold storage water tank 4 sends a corresponding signal to the controller 8, the controller 8 will automatically stop the cold storage and supply host 3.
In one embodiment, as shown in fig. 1-6, the air conditioning system further includes a cooling water supply system 6.
The cooling water supply system 6 supplies cold to the emergency water tank 5 and/or the air conditioning terminal 1 through the third heat exchanger 61.
The cooling water supply system 6 is a system necessary for the refrigeration main machine, and includes a cooling tower, a cooling water pump, and the like, which are contents in the prior art.
The cooling water supply system 6 is an outdoor cooling water supply system, and when the outdoor environment temperature is low, for example, lower than 6 ℃, the cooling water supply system 6 can supply cooling to the emergency water tank 5 and/or the air conditioner terminal 1, so that electricity can be saved.
The cooling water supply system 6 comprises a third heat exchanger 61, the water inlet end of the third heat exchanger 61 is connected with the water outlet end 12 of the air conditioner terminal 1 or the first circulation pipeline 21 through a fourth connecting pipeline 62, and the water outlet end of the third heat exchanger 61 is connected with the water inlet end 11 of the air conditioner terminal 1 or the first circulation pipeline 21 or the water inlet end of the emergency water tank 5 through a fifth connecting pipeline 63.
The cooling water supply system 6 may exchange heat with water in the first circulation line 21 through the third heat exchanger 61 and then supply cooling to the emergency water tank 5 and/or the air conditioning terminal 1 through the first circulation line 21.
In one embodiment, the air conditioning system comprises more than two emergency water tanks 5 connected in parallel, so that the emergency cooling capacity is improved.
In one embodiment, the air conditioning system comprises more than two cold accumulation water tanks 4 connected in parallel, so that the water storage capacity is improved, and the electricity charge is saved.
In one embodiment, the cold storage water tank 4 stores cold during the low electricity price period, and the cold storage water tank 4 stores cold during the high electricity price period, so that the electricity fee can be saved for the user by the mode of shifting peaks and filling valleys.
Referring to fig. 1 to 6, a control method of an air conditioning system according to an embodiment of the present invention includes:
the cooling main machine 2 supplies cooling to the air conditioner terminal 1.
The cold accumulation and supply host machine 3 accumulates cold to the cold accumulation water tank 4.
The cold accumulation and supply host machine 3 and/or the cold accumulation water tank 4 supply cold to the air conditioner tail end 1.
Wherein, when the cooling main machine 2 can not supply cold, the emergency water tank 5 supplies cold to the air conditioner terminal 1 and/or the cold accumulation water tank 4 supplies cold to the air conditioner terminal 1.
In one embodiment, the control method of the air conditioning system further includes:
the cold storage water tank 4 supplies cold to the air conditioning terminal 1 through the first heat exchanger 7.
In one embodiment, the control method of the air conditioning system further includes:
the cold accumulation and supply host machine 3 supplies cold to the air conditioner terminal 1 through the second heat exchanger 35.
The cold storage water tank 4 supplies cold to the air conditioning terminal 1 through the second heat exchanger 35.
In one embodiment, the control method of the air conditioning system further includes:
when the cold accumulation water tank 4 accumulates cold, the double safety valves 36 at the two ends of the cold accumulation and supply host machine 3 are closed, and the cold accumulation circulation pipeline 41 is kept disconnected from the pipeline at the air conditioner tail end 1.
In one embodiment, the control method of the air conditioning system further includes:
when the cold storage water tank 4 is cooled down, the controller 8 in the air conditioning system can control the opening and closing of the cold storage and supply main unit 3 according to the water temperature, and control the opening degree of the electric valve 48 according to the water temperature.
In one embodiment, the control method of the air conditioning system further includes, when the cold storage water tank 4 is used for cold storage or cold release:
when the pressures monitored by the pressure monitoring devices 49 at both ends of the cold storage water tank 4 conform to the safety range, the cold storage water tank 4 starts to store or discharge cold.
The air conditioning system and the control method provided by the embodiment of the invention can realize the combination of various working conditions according to the requirements, such as:
the cooling main machine 2 independently supplies cooling to the air conditioner tail end 1; the cold supply host 2 supplies cold to the air conditioner tail end 1 and simultaneously supplies cold to the emergency water tank 5; the cold accumulation and supply host 3 independently supplies cold to the air conditioner tail end 1; the cold accumulation and supply host 3 accumulates cold for the emergency water tank 5 and supplies cold to the air conditioner terminal 1; the cold accumulation and supply host machine 3 accumulates cold for the cold accumulation water tank 4; the cold accumulation and supply host machine 3 accumulates cold for the cold accumulation water tank 4 and supplies cold to the air conditioner terminal 1; the cold accumulation water tank 4 independently supplies cold to the air conditioner tail end 1; the cold accumulation water tank 4 accumulates cold for the emergency water tank 5 and supplies cold to the air conditioner tail end 1; the cooling main machine 2 and/or the cold accumulation cooling main machine 3 and/or the cold accumulation water tank 4 jointly supply cold; when the refrigeration host can not supply cold, the emergency water tank 5 supplies cold to the air conditioner tail end 1 in an emergency mode; when the environmental temperature is lower, the cooling water supply system 6 supplies cold to the air conditioner terminal 1 alone, the cooling water supply system 6 supplies cold to the emergency water tank 5 and supplies cold to the air conditioner terminal 1 at the same time, and the cooling water supply system 6, the cold supply host machine 2 and the cold accumulation and cold supply host machine 3 jointly supply cold and the like.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (16)
1. An air conditioning system is characterized by comprising an air conditioning tail end, at least one cold supply host, at least one cold accumulation and cold supply host, at least one cold accumulation water tank and at least one emergency water tank;
a first circulating pipeline is connected between the cooling main machine and the tail end of the air conditioner, and a first water pump is arranged on the first circulating pipeline;
the cold accumulation and supply host is connected with a second circulation pipeline capable of supplying cold to the tail end of the air conditioner, and a second water pump is arranged on the second circulation pipeline;
a cold accumulation circulating pipeline is connected between the cold accumulation water tank and the cold accumulation and supply host;
a cold supply circulating pipeline capable of supplying cold to the tail end of the air conditioner is connected to the cold accumulation water tank;
the emergency water tank is connected with the tail end of the air conditioner in series, or,
the emergency water tank is connected with the tail end of the air conditioner in parallel, and a fifth water pump is arranged on a pipeline between the water outlet end of the emergency water tank and the water inlet end of the tail end of the air conditioner.
2. The air conditioning system as claimed in claim 1, wherein a third water pump is provided on the cold storage circulation pipeline, and a first bypass pipeline connected in parallel with the third water pump is optionally provided on the cold storage circulation pipeline;
and a fourth water pump is arranged on the cooling circulation pipeline, and a second bypass pipeline connected with the fourth water pump in parallel is selectively arranged on the cooling circulation pipeline.
3. The air conditioning system of claim 1, comprising more than two cold accumulation and supply hosts;
the second circulating pipeline is connected between each cold accumulation and supply host and the tail end of the air conditioner;
any two adjacent cold accumulation and supply main machines are connected in series or in parallel.
4. The air conditioning system as claimed in claim 1, wherein two ends of the cold accumulation and supply host are respectively provided with a double safety valve capable of cutting off the cold accumulation circulation pipeline and the pipeline at the tail end of the air conditioner;
when the cold accumulation water tank accumulates cold through the cold accumulation and cold supply host, the double safety valves are closed.
5. The air conditioning system of claim 1, wherein a first heat exchanger is connected to the cooling circulation line;
the cold accumulation water tank supplies cold to the tail end of the air conditioner through the first heat exchanger.
6. The air conditioning system of claim 1, wherein a second heat exchanger is connected to the second circulation line, the cooling circulation line being in communication with the second heat exchanger;
the cold storage and supply host can supply cold to the tail end of the air conditioner through the second heat exchanger;
the cold accumulation water tank can supply cold to the tail end of the air conditioner through the second heat exchanger.
7. The air conditioning system as claimed in claim 1, wherein the water inlet end and the water outlet end of the cold accumulation water tank are respectively provided with a pressure monitoring device, and the water inlet end and the water outlet end of the cold accumulation water tank are provided with an electric valve.
8. The air conditioning system of claim 7, wherein the air conditioning system includes a controller;
a temperature monitoring device is arranged at the water inlet end of the cold accumulation and supply host;
the temperature monitoring device and the electric valve are respectively in signal connection with the controller.
9. The air conditioning system as claimed in claim 8, wherein a first temperature sensor is provided in the cold storage water tank, a second temperature sensor is provided in the emergency water tank, and a third temperature sensor is provided on the cooling circulation pipeline;
the first temperature sensor, the second temperature sensor and the third temperature sensor are respectively in signal connection with the controller.
10. The air conditioning system of claim 1, wherein the air conditioning system comprises a cooling water supply system;
the cooling water supply system supplies cooling to the emergency water tank and/or the air conditioning terminal through a third heat exchanger.
11. A control method of an air conditioning system as claimed in claims 1 to 10, characterized by comprising:
the cooling host supplies cooling to the tail end of the air conditioner;
the cold accumulation and supply host machine accumulates cold to the cold accumulation water tank;
the cold accumulation and supply host and/or the cold accumulation water tank supply cold to the tail end of the air conditioner;
when the cooling main machine can not supply cooling, the emergency water tank supplies cooling to the tail end of the air conditioner and/or the cold storage water tank supplies cooling to the tail end of the air conditioner.
12. The control method according to claim 11, characterized by further comprising:
the cold accumulation water tank supplies cold to the tail end of the air conditioner through the first heat exchanger.
13. The control method according to claim 11, characterized by further comprising:
the cold storage and supply host supplies cold to the tail end of the air conditioner through a second heat exchanger;
the cold accumulation water tank supplies cold to the tail end of the air conditioner through the second heat exchanger.
14. The control method of an air conditioning system according to claim 11, further comprising:
when the cold accumulation water tank accumulates cold, the double safety valves at the two ends of the cold accumulation and supply host machine are closed, and the cold accumulation circulation pipeline is kept disconnected with the pipeline at the tail end of the air conditioner.
15. The control method of an air conditioning system according to claim 11, further comprising:
when the cold accumulation water tank discharges cold, the controller in the air conditioning system can control the opening and closing of the cold supply host and/or the cold accumulation and cold supply host according to the water temperature and control the opening of the electric valve according to the water temperature.
16. The control method of an air conditioning system according to claim 11, further comprising, when the cold storage water tank is cold-storing or cold-releasing:
when the pressure monitored by the pressure monitoring devices at the two ends of the cold accumulation water tank conforms to the safety range, the cold accumulation water tank starts to accumulate or discharge cold.
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| CN202011013307.7A CN112178846A (en) | 2020-09-24 | 2020-09-24 | Air conditioning system and control method thereof |
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| CN202011013307.7A CN112178846A (en) | 2020-09-24 | 2020-09-24 | Air conditioning system and control method thereof |
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Application publication date: 20210105 |