CN114183859A - Ice storage system, control method and air conditioner - Google Patents

Ice storage system, control method and air conditioner Download PDF

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Publication number
CN114183859A
CN114183859A CN202111504216.8A CN202111504216A CN114183859A CN 114183859 A CN114183859 A CN 114183859A CN 202111504216 A CN202111504216 A CN 202111504216A CN 114183859 A CN114183859 A CN 114183859A
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China
Prior art keywords
water
host
water supply
water pump
main pipe
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CN202111504216.8A
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Chinese (zh)
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CN114183859B (en
Inventor
李宏波
李�杰
姜春苗
丁文涛
杨金龙
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-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
    • F24F5/0007Air-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
    • F24F5/0017Air-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/50Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61Control or safety arrangements characterised by user interfaces or communication using timers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/89Arrangement or mounting of control or safety devices
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14Thermal energy storage

Abstract

The invention discloses an ice cold storage system, a control method and an air conditioner, wherein the ice cold storage system comprises: the first water system comprises a first host and a first chilled water pump set, wherein a water supply port and a water return port of the first host are respectively connected with the first chilled water pump set through a first water supply main pipe and a first water return main pipe; the second water system comprises at least one second host and a second chilled water pump set, and a water supply port and a water return port of each second host are respectively connected with the second chilled water pump set through a second water supply main pipe and a second water return main pipe; a first branch is connected between the first water supply main pipe and the first water return main pipe, a second branch is connected between the first water supply main pipe and the second water supply main pipe, and a third branch is connected between the first water return main pipe and the second water return main pipe. On the premise of meeting the cooling demand of a user, the second cooler is used for standby of the first host, the number of hosts in system design is reduced, the stability of the system is ensured, and the flexibility of the system is improved.

Description

Ice storage system, control method and air conditioner
Technical Field
The invention relates to the technical field of air conditioning systems, in particular to an ice storage system, a control method and an air conditioner.
Background
The topic of energy saving is always a common hot topic in the world at present, the popularization of the energy storage technology is increased in China, the ice storage system becomes the development direction of the central air conditioner, and how to optimize and innovate in the ice storage system with higher quality is particularly important at present.
The existing ice cold storage system generally comprises a high-temperature water system and a low-temperature water system, and has various choices (high-temperature host and low-temperature host) for the host aiming at different end requirements, and the supply/return water temperatures of the cold machines which are correspondingly required in different water systems are different. The upper limit of the water outlet temperature of the conventional low-temperature host cannot meet the upper limit requirement of the water outlet temperature of the high-temperature host, and when the high-temperature host breaks down or needs to be shut down, the high-temperature host needs to be replaced by a separately designed standby host, so that the number of hosts in the ice storage system is increased, and the manufacturing cost is greatly increased.
Disclosure of Invention
The invention provides an ice cold storage system, a control method and an air conditioner, aiming at solving the defect that the cost is increased due to the fact that a standby host is additionally arranged in the conventional ice cold storage system.
The technical scheme adopted by the invention is that the ice storage system is designed, and comprises:
the first water system comprises a first host and a first chilled water pump set, wherein a water supply port and a water return port of the first host are respectively connected with the first chilled water pump set through a first water supply main pipe and a first water return main pipe;
the second water system comprises at least one second host and a second chilled water pump set, and a water supply port and a water return port of each second host are respectively connected with the second chilled water pump set through a second water supply main pipe and a second water return main pipe;
a first branch is connected between the first water supply main pipe and the first water return main pipe, a second branch is connected between the first water supply main pipe and the second water supply main pipe, and a third branch is connected between the first water return main pipe and the second water return main pipe.
The first water supply main pipe is provided with a first water supply valve, and the first branch is provided with a water mixing valve; the water supply port of each second host is connected to the second water supply main pipe through a second water supply valve and connected to the second branch through a water supply branch valve, and the water return port of each second host is connected to the second water return main pipe through a second water return valve and connected to the third branch through a water return branch valve.
Preferably, the first chilled water pump group includes: the first chilled water pump and the at least one first spare water pump are arranged in parallel, and the first spare water pump can replace the first chilled water pump when the first chilled water pump fails or has a shutdown requirement.
Preferably, the second chilled water pump group includes: the second chilled water pump and the at least one second standby water pump are in one-to-one correspondence with the second host, the second chilled water pump and the second standby water pump are arranged in parallel, and the second standby water pump can replace the second chilled water pump when the second chilled water pump fails or has a shutdown requirement.
Further, the ice thermal storage system further comprises: the monitoring system comprises a monitoring module for monitoring the running states of the first water system and the second water system and a control module for controlling the running states of the first water system and the second water system, wherein the monitoring module is in communication connection with the control module and is provided with a human-computer interaction interface.
It should be noted that the upper limit outlet water temperature of the first main machine is higher than the upper limit outlet water temperature of the second main machine, that is, the first main machine is a high-temperature main machine, and the second main machine is a low-temperature main machine.
The invention also provides a control method of the ice storage system, which comprises the following steps:
when receiving a command of closing the first host, the corresponding first chilled water pump and the valve;
judging whether all the second hosts are in operation or not;
if yes, selecting one second host from the operating second hosts as a standby host to be accessed into the first water system;
if not, selecting one second host machine from the non-operating second host machines as a standby host machine to be connected into the first water system.
Preferably, the control method further includes:
after the standby host is connected into the first water system, the corresponding first chilled water pump and the corresponding valve are opened;
detecting the water supply temperature of the first water supply main pipe;
and adjusting the opening of the water mixing valve of the first branch according to the water supply temperature and a first water supply target value set by a user.
Further, adjusting the opening degree of the mixing valve of the first branch according to the water supply temperature and the first water supply target value set by the user includes:
judging the water supply temperature and the first water supply target value at set intervals;
when the water supply temperature is less than the first water supply target value-set deviation value and continuously meets the set duration, the opening degree of the water mixing valve is increased;
and when the water supply temperature is greater than the first water supply target value plus the set deviation value and continuously meets the set duration, reducing the opening degree of the water mixing valve.
In one embodiment, the adjustment amount Δ K for each increase or decrease of the mixing valve is: and delta K = K & ltepsilon & gt, wherein K is the opening degree of the current water mixing valve, and epsilon is a set proportion.
Preferably, before the standby host is connected to the first water system, the standby host is closed, the connection with the second water system is disconnected, and the second chilled water pump with the longest operation time in the second chilled water pump group is closed.
Further, if all the second hosts are running, the user judges whether to start the standby host, if so, the user manually selects the standby host from the running second hosts, and if not, the process is ended. If the second host does not operate, the standby host is automatically selected from the second hosts which do not operate according to the alternate rest principle, and the two selection modes can ensure that the second water system still meets the cooling demand of the user after the standby host is connected to the first water system.
The invention also provides an air conditioner adopting the ice storage system.
Compared with the prior art, the invention has the following beneficial effects:
1. on the premise of meeting the cooling demand of a user, the second cooler is used for standby of the first host, the number of hosts in system design is reduced, the stability of the system is ensured, the flexibility of the system is improved, and the manufacturing cost of the system is greatly reduced;
2. the opening degree of the water mixing valve is adjusted according to the water outlet temperature of the first water supply main pipe and a first water supply target value set by a user, and different cooling requirements of the user are met.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
FIG. 1 is a schematic connection diagram of an ice storage system in an embodiment of the present invention;
fig. 2 is a flow chart illustrating a control method according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are only for illustrating the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1, the ice storage system provided by the present invention can be applied to an air conditioner, and includes a first water system and a second water system, where the first water system includes a first main unit 1 and a first chilled water pump unit 3, the second water system includes at least one second main unit 2 and a second chilled water pump unit 4, both the first main unit 1 and the second main unit 2 include a condenser and an evaporator, an upper limit outlet water temperature of the first main unit is higher than an upper limit outlet water temperature of the second main unit, that is, the first main unit is a high temperature main unit, and the second main unit is a low temperature main unit.
The water supply mouth of first host computer 1 has connected gradually first water main 9, first water knockout drum 5, first water collector 6 and is connected to the water inlet of first refrigerated water pump package 3, and the return water mouth of first host computer 1 passes through the delivery port that first return water main 10 connects first refrigerated water pump package 3, and the hydrologic cycle of first water system flows to: the water supply port of the first main unit 1 → the first water supply header pipe 9 → the first water separator 5 → the first water collector 6 → the first chilled water pump group 3 → the first return header pipe 10 → the return port of the first main unit 1. The water supply mouth parallel connection of all second host computers 2 is on second water main 12, and the return water mouth parallel connection of all second host computers 2 is on second return water house steward 13, and second water main 12 is connected to the water inlet of second refrigerated water pump package 4 after establishing ties second water knockout drum 7 and second water collector 8 in proper order, and the delivery port of second refrigerated water pump package 4 is connected to second return water house steward 13, and the hydrologic cycle of second water system flows to: the water supply port of the second main unit 2 → the second water supply header pipe 12 → the second water separator 7 → the second water collector 8 → the second chilled water pump group 4 → the second water return header pipe 13 → the water return port of the second main unit 2.
A first branch 11 is connected between the first water supply main 9 and the first water return main 10, and when the first branch 11 is connected, water flowing out of the first chilled water pump group 3 is mixed into the first water supply main 9 through the first branch 11 so as to adjust the water supply temperature of the first water supply main 9. Be connected with second branch road 14 between first water main 9 and the second water main 12, be connected with third branch road 15 between first water main 10 and the second water main 13, the on-off state of second branch road 14 and third branch road 15 is the same, when second branch road 14, when third branch road 15 switch-on, the water that second host computer 2 flows out sends first water main 9 through second branch road 14, the water that first refrigerated water pump package 3 flows out sends the return water mouth of second host computer 2 through third branch road 15 to realize the reserve first host computer 1 of second host computer 2.
The on-off of each pipeline in the system adopts the valve to switch, and first water supply main 9 installs first water supply valve V1, and first branch road 11 installs muddy water valve V2, and first water supply valve V1 and muddy water valve V2 all adopt the proportional valve, can adjust the water flow in a flexible way for water supply temperature reaches the requirement of first water system leaving water temperature. The water supply mouth of every second host 2 is connected on second water main 12 through second water supply valve, through supplying water the branch road valve and connecting on second branch road 14, the return water mouth of every second host 2 is connected on second return water house steward 13 through second return water valve, through return water branch road valve connection on third branch road 15, second water supply valve, second return water valve, supply water branch road valve and return water branch road valve all adopt electric butterfly valve.
It should be understood that the second water supply valve and the second water return valve have the same on-off state, the water supply branch valve and the water return branch valve have the same on-off state, and when the second water return valve and the second water supply valve of a certain second host 2 are switched on and the water supply branch valve and the water return branch valve are switched off, the second host 2 is switched in the second water system and is disconnected from the first water system; when the second water return valve and the second water supply valve of a certain second host 2 are turned off and the water supply branch valve and the water return branch valve are turned on, the second host 2 is disconnected from the second water system and is connected to the first water system. The second main machine 2 is connected in a second water system during normal operation, a water supply branch valve and a water return branch valve of the second main machine are kept open, a second water supply valve and a second water return valve of the second main machine are kept closed, and the second main machine 2 supplies cold for the corresponding tail end of the second main machine.
For example, in an embodiment of the present invention, the second water system is provided with two second hosts 2, i.e., a second host 21 No. 1 and a second host 22 No. 2, because the second water supply valve and the second water return valve of the same second host have the same on-off state and the water supply branch valve and the water return branch valve have the same on-off state, in order to facilitate identification and control, the second water supply valve and the second water return valve of the second host No. 1 are labeled by V3, the water supply branch valve and the water return branch valve of the second host 21 No. 1 are labeled by V5, the second water supply valve and the second water return valve of the second host No. 2 22 are labeled by V4, and the water supply branch valve and the water return branch valve of the second host No. 2 22 are labeled by V6.
As shown in fig. 1, the first chilled water pump group 3 includes a first chilled water pump and at least one first backup water pump, which are in one-to-one correspondence with the first main unit 1, and the first chilled water pump and the first backup water pump are arranged in parallel, the first backup water pump can replace the first chilled water pump when the first chilled water pump fails or needs to be shut down, and the first chilled water pump maintains a closed state when the first chilled water pump operates normally. Similarly, the second chilled water pump group 4 comprises a second chilled water pump and at least one second standby water pump which are in one-to-one correspondence with the second main machine, the second chilled water pump and the second standby water pump are arranged in parallel, the second standby water pump can replace the second chilled water pump when the second chilled water pump fails or has a shutdown demand, and the second chilled water pump keeps in a closed state when the second chilled water pump operates normally.
In order to realize the man-machine interaction control of the ice cold storage system, the ice cold storage system further comprises: the system comprises a monitoring module and a control module in communication connection with the monitoring module, wherein the whole implementation process can be divided into a monitoring layer, a control layer and an equipment layer, and the equipment layer refers to a first water system and a second water system; the monitoring module monitors the running state of the equipment layer and is provided with a human-computer interaction interface, and a user can input commands to the control module through the human-computer interaction interface; the control module is responsible for on-off control, operation fault and other state monitoring of each component of the equipment layer, and transmits relevant information of the equipment layer to the monitoring layer through odbus RTU, Modbus TCP/IP, BACNET, MBus and other protocol forms.
When the second host 2 is used as a standby host to replace the first host 1, the control module executes a corresponding control method, specifically executing the following steps:
when receiving a command of closing the first host 1, closing the first host, the corresponding first chilled water pump and the valve;
judging whether all the second hosts 2 are in operation;
if yes, the user judges whether the standby host is started, if yes, the user manually selects one second host 2 from the running second hosts as the standby host to be connected into the first water system, before the standby host is connected into the first water system, the standby host is firstly closed and disconnected from the second water system, the second chilled water pump with the longest running time in the second chilled water pump group 4 is closed, the second chilled water pump is prevented from running for a long time, and if not, the process is ended;
if not, automatically selecting one second host from the non-operating second hosts 2 as a standby host to access the first water system according to the alternate rest principle, and avoiding the long-time operation of the second hosts 2.
The first of the two selection modes is that a user automatically selects a standby host through a human-computer interaction interface according to actual use requirements, the second mode is that the standby host is selected from the non-operating second hosts 2, and the other operating second hosts 2 keep normal operation. Therefore, after the standby host is connected to the first water system, the second water system still meets the cooling demand of the user.
In order to meet different cooling requirements of users, the control method further comprises the following steps:
after the standby host is connected into the first water system, the corresponding first chilled water pump and the corresponding valve are opened;
detecting the water supply temperature of the first water supply main pipe;
judging the water supply temperature and the first water supply target value at set intervals;
when the water supply temperature is less than the first water supply target value-set deviation value and continuously meets the set duration, the opening degree of the water mixing valve is increased;
and when the water supply temperature is greater than the first water supply target value plus the set deviation value and continuously meets the set duration, reducing the opening degree of the water mixing valve.
The purpose of the adjustment action of the mixing valve is to enable the water supply temperature after mixing to be close to a first water supply target value, and the adjustment quantity delta K of the mixing valve which is increased or decreased each time is as follows: and delta K = K & ltepsilon & gt, wherein K is the opening degree of the current water mixing valve, and epsilon is a set proportion. In some embodiments, the first water supply target value is 13 ℃, the deviation value is 1 ℃, the duration is 60s, and ε% is 5%.
As shown in fig. 2, the flow of the control method is described in detail in the above-mentioned embodiment, in which the second water system is provided with two second hosts 2, i.e., the second host No. 1 21 and the second host No. 2 22, and the second host 2 is executed as follows for backing up the first host 1.
When the first host 1 fails or needs to be shut down, a command for closing the first host 1 is issued;
closing a cooling water pump, a cooling tower fan and a corresponding valve corresponding to the first host 1;
closing a first chilled water pump command corresponding to the first host 1;
closing the first water supply valve V1 and the mixing valve V2 of the first main unit 1;
detecting whether both second hosts 2 are running;
if yes, the second host machine 2 is not idle at present, a prompt box for judging whether to switch the high-temperature operation condition of the second host machine 2 is popped up by the man-machine interaction interface, if not, the flow is ended, if yes, the No. 1/No. 2 second host machine is selected by a user as a standby host machine to operate the high-temperature operation condition, the standby host machine is closed, a second chilled water pump with the longest operation time in a second chilled water pump group is closed, if the No. 1 second host machine is selected, two V3 are closed, two V5 are opened, and if the No. 2 second host machine is selected, two V4 are closed, and two V6 are opened;
if not, selecting one second host from the second hosts which do not operate according to a duty-cycle principle as a standby host to be connected into a first water system, starting a cooling water pump corresponding to the first host replaced by the standby host, starting a valve of a cooling water inlet of the standby host after the cooling water pump is started in place, selecting one cooling tower from the first water system according to the duty-cycle principle, starting a valve of an inlet and an outlet of the cooling tower, if the number 1 second host is selected according to the duty-cycle principle, closing two V3 and opening two V5, and if the number 2 second host is selected, closing two V4 and opening two V6;
after the valve is opened in place, the valve is opened to V1, and after the valve is opened to V1, a first refrigeration water pump corresponding to the first host machine replaced by the standby host machine is opened, and after the first refrigeration water pump reaches the default frequency, the standby host machine is opened, and the opening degree of the valve V2 is adjusted according to the first water supply target value set by the user.
It should be understood that the cooling tower, the cooling water pump and the first main unit in the first water system are also in a one-to-one correspondence relationship, and the above alternate rest principle can adopt the prior art, and the effect of the alternate rest principle is to balance the working time of the water pump/main unit/cooling tower and prolong the service life. For example, the water pumps/hosts/cooling towers with the shortest startup time are started according to the sequencing of the startup time, the shutdown rest with the longest total startup time.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (14)

1. An ice thermal storage system, comprising:
the system comprises a first water system and a second water system, wherein the first water system comprises a first host and a first chilled water pump set, and a water supply port and a water return port of the first host are respectively connected with the first chilled water pump set through a first water supply main pipe and a first water return main pipe;
the second water system comprises at least one second host and a second chilled water pump set, and a water supply port and a water return port of each second host are respectively connected with the second chilled water pump set through a second water supply main pipe and a second water return main pipe;
a first branch is connected between the first water supply main pipe and the first water return main pipe, a second branch is connected between the first water supply main pipe and the second water supply main pipe, and a third branch is connected between the first water return main pipe and the second water return main pipe.
2. An ice storage system according to claim 1 wherein the first water main is fitted with a first water supply valve and the first branch is fitted with a water mixing valve; the water supply port of each second main machine is connected to the second water supply main pipe through a second water supply valve and connected to the second branch through a water supply branch valve; and the water return port of each second host is connected to the second water return header pipe through a second water return valve and connected to the third branch through a water return branch valve.
3. An ice thermal storage system according to claim 1, wherein said first chilled water pump group includes: the system comprises a first chilled water pump and at least one first spare water pump, wherein the first chilled water pump and the first spare water pump are arranged in parallel.
4. An ice thermal storage system according to claim 1, wherein said second chilled water pump group includes: and the second chilled water pump and the at least one second standby water pump are in one-to-one correspondence with the second host, and the second chilled water pump and the second standby water pump are arranged in parallel.
5. An ice thermal storage system as claimed in claim 1, further comprising: the monitoring module is in communication connection with the control module, and the monitoring module is provided with a human-computer interaction interface.
6. An ice thermal storage system according to any one of claims 1 to 5 wherein the upper bound leaving water temperature of the first host is higher than the upper bound leaving water temperature of the second host.
7. A control method of an ice storage system, characterized in that the ice storage system is the ice storage system as claimed in any one of claims 1 to 6, the control method comprising:
when receiving a command of closing the first host, the corresponding first chilled water pump and the valve;
judging whether all the second hosts are in operation or not;
if yes, selecting one second host from the operating second hosts as a standby host to access the first water system;
if not, selecting one second host machine from the non-operating second host machines as a standby host machine to access the first water system.
8. The control method according to claim 7, characterized by further comprising:
after the standby host is connected into the first water system, the corresponding first chilled water pump and the corresponding valve are opened;
detecting the water supply temperature of the first water supply main pipe;
and adjusting the opening of the water mixing valve of the first branch according to the water supply temperature and a first water supply target value set by a user.
9. The control method of claim 8, wherein adjusting the opening of the mixing valve of the first branch according to the supply water temperature and the first supply water target value set by the user comprises:
judging the water supply temperature and the first water supply target value at set intervals;
when the water supply temperature is less than a first water supply target value-set deviation value and continuously meets the set duration, increasing the opening degree of the water mixing valve;
and when the water supply temperature is greater than the first water supply target value plus the set deviation value and continuously meets the set duration, reducing the opening degree of the water mixing valve.
10. The control method according to claim 9, wherein the adjustment amount Δ K for each increase or decrease of the mixing valve is: and delta K = K & ltepsilon & gt, wherein K is the opening degree of the current water mixing valve, and epsilon is a set proportion.
11. The control method of claim 7, wherein before the backup main machine accesses the first water system, the backup main machine is turned off and disconnected from the second water system, and the second chilled water pump with the longest operation time in the second chilled water pump group is turned off.
12. The control method according to any one of claims 7 to 11, wherein if all the second hosts are operating, the user determines whether to activate the standby host, and if so, the user manually selects the standby host from the operating second hosts, and if not, the process is ended.
13. The control method according to any one of claims 7 to 11, wherein if there is a second host that is not operating, the standby host is automatically selected among the non-operating second hosts according to a round-robin principle.
14. An air conditioner, characterized in that the air conditioner employs the ice thermal storage system as claimed in any one of claims 1 to 6.
CN202111504216.8A 2021-12-10 2021-12-10 Ice storage system, control method and air conditioner Active CN114183859B (en)

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CN202111504216.8A CN114183859B (en) 2021-12-10 2021-12-10 Ice storage system, control method and air conditioner

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