CN113091140B - Multilayer coil air conditioning unit and coil position adjusting method - Google Patents

Multilayer coil air conditioning unit and coil position adjusting method Download PDF

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Publication number
CN113091140B
CN113091140B CN202110572044.1A CN202110572044A CN113091140B CN 113091140 B CN113091140 B CN 113091140B CN 202110572044 A CN202110572044 A CN 202110572044A CN 113091140 B CN113091140 B CN 113091140B
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temperature
liquid
liquid supply
coil
pipe
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CN113091140A (en
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龚慧钦
夏铭
王超
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Industrial and Commercial Bank of China Ltd ICBC
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Industrial and Commercial Bank of China Ltd ICBC
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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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/032—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers
    • F24F1/0323—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • 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
    • F24F2110/10—Temperature

Abstract

The invention provides a multilayer coil air conditioning unit and a coil position adjusting method, comprising the following steps: the device comprises a plurality of liquid supply pipes, a plurality of liquid return pipes, a plurality of layers of coil pipes, a plurality of multi-way electromagnetic valves, a temperature measurer and a controller; the inlet and the outlet of each layer of coil pipe are respectively connected with one end of a multi-way electromagnetic valve, the other ends of the multi-way electromagnetic valve connected with the inlet of the coil pipe are respectively connected with a liquid supply pipe, and the other ends of the multi-way electromagnetic valve connected with the outlet of the coil pipe are respectively connected with a liquid return pipe; the temperature measurer is used for measuring the liquid temperature in the liquid supply pipe and the ambient temperature; the controller is connected with the multi-way electromagnetic valve and the temperature measurer and used for adjusting the opening and closing of the multi-way electromagnetic valve according to the liquid temperature in each liquid supply pipe and the ambient temperature so that each coil pipe is only connected with one liquid supply pipe and one liquid return pipe, and the liquid temperature connected with each coil pipe is arranged from large to small according to the flow direction of hot air flow. The temperature of the front side coil pipe of the multilayer coil pipe can be relatively high, the temperature of the rear side coil pipe is relatively low, and energy can be saved.

Description

Multilayer coil air conditioning unit and coil position adjusting method
Technical Field
The invention relates to the field of refrigeration equipment, in particular to a multilayer coil air conditioning unit and a coil position adjusting method.
Background
In the prior art, a multi-layer coil air conditioning unit, especially a double-layer coil air conditioning unit, can ensure the safety and reliability of a data center (such as financial industry, electric power industry and the like). As shown in fig. 1, the working principle of the double-layer coil air conditioning unit is as follows: one air conditioning unit is internally provided with two layers of mutually independent 'water-wind' heat exchange coil pipes, and chilled water is respectively circulated in the two layers of coil pipes to form a low-temperature coil pipe. The hot air in the machine room is driven by the air-conditioning fan and sequentially passes through the two layers of heat exchange coil pipes (low-temperature coil pipes) to become cold air. The machine room is cooled through continuous chilled water circulation, heat exchange of the heat exchange coil and air circulation.
The two layers of coils of a dual coil air conditioner configuration are typically used as "redundant backups for each other". That is, any layer of the two layers of the coil pipes is in a normal operation state (the water supply circulation is normal, and the low-temperature coil pipes are realized), so that the normal refrigeration work can be realized, and the normal operation of the cooling of the machine room is realized.
The two layers of coil pipes configured by the double-coil air conditioner can also be used as pre-cooling and then converging. Namely, the water temperature of the A \ B path water supply is inconsistent: the path B water is from a natural cold source (a refrigerator is not adopted, and the low temperature of the natural climate environment is directly utilized to cool water), the water temperature is relatively higher, so that the temperature of a coil pipe at the front side is relatively higher; the water in the path A is from the mechanical refrigeration of the refrigerator, the water temperature is relatively lower, and the temperature of the rear coil is relatively lower. After being precooled by the front coil pipe, the air is further cooled by the rear coil pipe to reach the required room refrigeration temperature.
The production and operation of the data center in the financial industry are safe and stable, and meanwhile, due to the goals of carbon peak reaching and carbon neutralization, a large amount of natural cold sources are utilized, so that green emission reduction is realized. Therefore, the redundant backup capability of the double coil pipes is used; but also has the capability of precooling before convergence.
The current problems with this architecture are: when air passes through the two layers of coils, the temperature of the front side coil is required to be relatively high, and the temperature of the rear side coil is required to be relatively low to save energy. If the front part is low and the rear part is high, the energy is not saved, and even the required temperature cannot be reached.
In the prior art, the problems of low front and high back and energy saving of the framework of the double-layer coil air conditioning unit can occur under certain conditions. In some cases, such as in winter in severe cold, the free cold source is at a particularly low temperature, lower than mechanical refrigeration. When some circumstances for example A/B way cold source is maintained on line again, can not guarantee that A/B way temperature is high who is low, when partial air conditioning unit design, with multichannel temperature design for unanimity for air conditioning unit is not suitable for the inconsistent operation scheme of temperature, when being applied to the inconsistent operation scheme of temperature, will lead to the coil pipe confusion, can not energy-conserving problem.
Disclosure of Invention
The liquid supply pipe of the multilayer coil air conditioning unit is fixed with the connection mode of the coils, and the defects of poor self-adaption, energy waste and poor refrigeration effect under certain conditions are overcome.
In order to solve the above technical problem, a first aspect of the present disclosure provides a multi-layer coil air conditioning unit, including: the device comprises a plurality of liquid supply pipes, a plurality of liquid return pipes, a plurality of layers of coil pipes, a plurality of multi-way electromagnetic valves, a temperature measurer and a controller;
the inlet and the outlet of each layer of coil pipe are respectively connected with one end of a multi-way electromagnetic valve, the other ends of the multi-way electromagnetic valve connected with the inlet of the coil pipe are respectively connected with a liquid supply pipe, and the other ends of the multi-way electromagnetic valve connected with the outlet of the coil pipe are respectively connected with a liquid return pipe;
the temperature measurer is used for measuring the liquid temperature in the liquid supply pipe and the ambient temperature;
the controller is connected with the multi-way electromagnetic valve and the temperature measurer and used for adjusting the opening and closing of the multi-way electromagnetic valve according to the liquid temperature in each liquid supply pipe and the ambient temperature so that each coil pipe is only connected with one liquid supply pipe and one liquid return pipe, and the liquid temperature connected with each coil pipe is arranged from large to small according to the flow direction of hot air flow.
In further embodiments herein, the multi-layer coil air conditioning unit further comprises: and the cold source equipment is respectively connected with the liquid supply pipe and is used for providing cold liquid for the liquid supply pipe.
In a further embodiment of the present disclosure, when at least one coil does not work, the controller is further configured to sequence the liquid supply tubes according to a sequence from a small temperature to a large temperature of liquid in the liquid supply tube, and respectively connect N liquid supply tubes before ranking to the working coils by adjusting on/off of the multi-way solenoid valve, where N is the number of the working coils.
In a further embodiment of the present disclosure, when there is at least one liquid supply tube, the controller is further configured to select the liquid supply tube without stopping according to a preset schedule, and connect the liquid supply tube without stopping to the plurality of coils by adjusting the on/off of the multi-way solenoid valve.
In a further embodiment of this document, the controller adjusts the on/off of the multi-way solenoid valve according to the liquid temperature in each liquid supply pipe and the ambient temperature, so that the liquid temperature of each coil pipe is sequenced from large to small according to the flow direction of the hot gas flow, including:
comparing the ambient temperature with the temperature of the liquid in each liquid supply tube;
if the environmental temperature is lower than the liquid temperature in each liquid supply pipe, any multi-way electromagnetic valve is not opened;
if the environmental temperature is higher than the liquid temperature in each liquid supply pipe, the switch of the electromagnetic valve is adjusted, so that the liquid temperatures accessed by the coil pipes are sequenced from large to small according to the flow direction of hot air flow;
and if the ambient temperature is higher than the temperature of the liquid in at least one liquid supply pipe but not higher than the temperature of the liquid in each liquid supply pipe, selecting a supplementary liquid supply pipe from the liquid supply pipes with the liquid temperature lower than the ambient temperature according to a preset plan, and connecting the supplementary liquid supply pipes into the plurality of coil pipes.
In further embodiments herein, the multi-layer coil air conditioning unit further comprises: the alarm is connected with the controller;
and when the ambient temperature is lower than the temperature of the liquid in each liquid supply pipe, the controller starts an alarm to give an alarm.
In further embodiments herein, the multi-layer coil air conditioning unit further comprises: the communication module is connected with the controller and cold source equipment connected with the liquid supply pipe;
when the environment temperature is lower than the liquid temperature in each liquid supply pipe, the controller sends a cold source temperature adjusting instruction to the cold source equipment through the communication module.
A second aspect of the present disclosure provides a method for adjusting a position of a coil of a multi-layer coil air conditioning unit, which is applied to the multi-layer coil air conditioning unit according to any of the foregoing embodiments, and includes:
collecting the liquid temperature and the ambient temperature in each liquid supply pipe;
and adjusting the opening and closing of the multi-way electromagnetic valve according to the liquid temperature in each liquid supply pipe and the ambient temperature so that each coil pipe is only connected with one liquid supply pipe and one liquid return pipe, and the liquid temperature connected with each coil pipe is sequenced from large to small according to the flow direction of hot air flow.
A third aspect of the present disclosure provides a computer apparatus comprising a memory, a processor, and a computer program stored on the memory, the computer program being executable by the processor to perform instructions of a method for adjusting a position of coils of a multi-coiled air conditioning unit.
A fourth aspect herein provides a computer storage medium having stored thereon a computer program that, when executed by a processor of a computer device, executes instructions of a method of adjusting a position of coils of a multi-coiled air conditioning unit.
The multilayer coil air conditioning unit comprises a multilayer coil, a plurality of multi-way electromagnetic valves, a temperature measurer and a controller, wherein the inlet and the outlet of each layer of coil are respectively connected with one end of each multi-way electromagnetic valve, the other ends of the multi-way electromagnetic valves connected with the inlets of the coils are respectively connected with a liquid supply pipe, the other ends of the multi-way electromagnetic valves connected with the outlets of the coils are respectively connected with a liquid return pipe, the controller is connected with the multi-way electromagnetic valves and the temperature measurer, the multi-way electromagnetic valves are adjusted to be opened and closed according to the liquid temperature and the ambient temperature in each liquid supply pipe, so that each coil is only connected with one liquid supply pipe and one liquid return pipe, the liquid temperature connected with each coil is sequenced from large to small according to the flow direction of hot air, and the self-adaptive adjustment of the position of the multilayer coil can be realized according to the liquid temperature and the ambient temperature in the liquid supply pipes, the front side coil pipe of the multilayer coil pipe is guaranteed to be relatively high in temperature, and the rear side coil pipe is relatively low in temperature (the front side coil pipe refers to the direction of entering hot air flow, and the rear side coil pipe refers to the direction of flowing out cold air flow), so that energy can be saved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 illustrates a schematic diagram of a prior art two-layer coil air conditioning unit;
FIG. 2A illustrates a schematic diagram of a multi-layer coil air conditioning unit according to embodiments herein;
FIG. 2B illustrates a schematic electrical connection diagram of a multi-layer coil air conditioning unit according to embodiments herein;
FIG. 3 illustrates a schematic diagram of a two-layer coil air conditioning unit according to embodiments herein;
FIGS. 4A-4C are schematic diagrams illustrating various operating states of a multi-way solenoid valve according to embodiments herein;
5A-5F illustrate a connection diagram of a two-layer coil air conditioning unit at each temperature state of the two-layer coil air conditioning unit according to embodiments herein;
FIG. 6 is a flow chart illustrating a method for adjusting the position of the coils of the multi-layer coil air conditioning unit according to an embodiment of the present disclosure;
FIG. 7 is a block diagram illustrating a computer device according to an embodiment of the present disclosure.
Description of the symbols of the drawings:
210. a liquid supply tube;
220. a liquid return pipe;
230. a coil pipe;
231. an inlet;
232. an outlet;
240. a multi-way solenoid valve;
250. a temperature measurer;
260. a controller;
702. a computer device;
704. a processor;
706. a memory;
708. a drive mechanism;
710. an input/output module;
712. an input device;
714. an output device;
716. a presentation device;
718. a graphical user interface;
720. a network interface;
722. a communication link;
724. a communication bus.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments herein without making any creative effort, shall fall within the scope of protection.
The present specification provides method steps as described in the examples or flowcharts, but may include more or fewer steps based on routine or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual system or apparatus product executes, it can execute sequentially or in parallel according to the method shown in the embodiment or the figures.
In view of the technical problems of the prior art that the connection between the liquid supply pipe and the coil of the multi-layer coil air conditioning unit is fixed (as shown in fig. 1), the multi-layer coil air conditioning unit has poor self-adaptation, energy waste in some cases, and poor refrigeration effect, in order to solve the technical problems, in an embodiment herein, there is provided a multi-layer coil air conditioning unit, as shown in fig. 2A and 2B, the multi-layer coil air conditioning unit includes: a plurality of liquid supply pipes 210, a plurality of liquid return pipes 220, a plurality of layers of coils 230, a plurality of multi-way solenoid valves 240, a temperature measurer 250 and a controller 260. The number of the liquid supply pipes 210, the liquid return pipes 220 and the coil pipes 230 is the same, and the liquid supply pipes 210 and the liquid return pipes 220 are arranged in pairs and are respectively connected with the outlets and inlets of the cold sources.
Each layer of coil pipe 230 is provided with an inlet 231 and an outlet 232, the inlet 231 and the outlet 232 of the coil pipe are respectively connected with one end of a multi-way electromagnetic valve 240, the other ends of the multi-way electromagnetic valve 240 connected with the inlet 231 of the coil pipe are respectively connected with a liquid supply pipe 210, and the other ends of the multi-way electromagnetic valve 240 connected with the outlet 232 of the coil pipe are respectively connected with a liquid return pipe 220;
a temperature measurer 250 for measuring the temperature of the liquid in the liquid supply pipe and the ambient temperature;
the controller 260 is connected to the multi-way solenoid valve 240 and the temperature measuring device 250, and is configured to adjust the opening and closing of the multi-way solenoid valve 240 according to the liquid temperature and the ambient temperature in each liquid supply tube 210, so that each coil tube 230 is connected to only one liquid supply tube 210 and one liquid return tube 220, and the liquid temperature connected to each coil tube 230 is arranged from large to small according to the flow direction of the hot air, that is, the temperature of the liquid connected to each coil tube 230 is arranged from large to small according to the flow direction of the hot air (i.e., the temperature of the liquid connected to each coil tube is arranged from the coil tube close to the cold air flow discharge tube).
In specific implementation, the connection relationship of the multi-way electromagnetic valve is recorded in a data table, the connection relationship includes the conditions of a connection disc pipe connector of an electromagnetic valve port and a liquid supply pipe or a liquid return pipe, and specifically, as shown in table one, the controller can know the connection condition of the multi-way electromagnetic valve according to the table, so as to control the multi-way electromagnetic valve.
Watch 1
Multi-way electromagnetic valve Port 1 … Port n
Liquid supply end of coil pipe 1 Inlet port … Liquid supply pipe n
Liquid supply end of coil pipe 1 An outlet … Liquid return pipe n
… … … …
The embodiment is suitable for temperature control of machine rooms, such as machine rooms of financial data centers and machine rooms of network data centers, and the specific application field is not limited herein. After the connection relation of the multilayer coil air conditioning unit is determined, cold liquid in the liquid supply pipe can enter the coil pipe through the connected multi-way electromagnetic valves, and can enter the liquid return pipe through the connected multi-way electromagnetic valves after passing through the coil pipe.
In the embodiment, the multilayer coil air-conditioning unit is designed to comprise a plurality of layers of coils, a plurality of multi-way electromagnetic valves, a temperature measurer and a controller, wherein the inlet and the outlet of each layer of coils are respectively connected with one end of one multi-way electromagnetic valve, the other ends of the multi-way electromagnetic valves connected with the inlets of the coils are respectively connected with a liquid supply pipe, the other ends of the multi-way electromagnetic valves connected with the outlets of the coils are respectively connected with a liquid return pipe, the controller is connected with the multi-way electromagnetic valves and the temperature measurer, the multi-way electromagnetic valves are adjusted to be opened and closed according to the temperature of liquid in each liquid supply pipe and the ambient temperature, so that the temperature of the liquid connected into each coil is arranged from large to small according to the flow direction of hot air, the self-adaptive adjustment of the position of the multilayer coils can be realized according to the temperature of the liquid in the liquid supply pipes, the temperature of the front side coils of the multilayer coils is ensured to be relatively high, and the temperature of the rear side coils is relatively low (the front side coils refer to the direction of the hot air entering the hot air, the rear side refers to the direction of the cold air flow flowing out), the optimal energy-saving state can be achieved, and the purpose of energy saving is achieved.
During the concrete implementation, different cold source equipment is connected to every kind of liquid feed pipe, and the cold liquid temperature that cold source equipment provided is all inequality. The liquid temperature difference range between each liquid supply pipe can be the same or different, and the liquid temperature difference range is not limited in the text. The coolant in the cold source device includes but is not limited to water, glycol, freon, etc. The liquid supply pipes and the liquid return pipes are arranged in pairs, and each liquid supply pipe corresponds to one liquid return pipe.
The interface quantity of the multi-way electromagnetic valve is related to the number of the coils, specifically, the number N of the interfaces of the multi-way electromagnetic valve is M +1 of the number of the coils, under the ordinary condition, the number of the coils is 2, the scene is the most practical, the corresponding multi-way electromagnetic valve is a three-way electromagnetic valve, wherein, the working state schematic diagram of the three-way electromagnetic valve is shown in fig. 4A to 4C, the on-state circuit of the valve is realized by controlling the current flowing into the electromagnetic valve, and then different liquid supply pipes or liquid return pipes are accessed. Accordingly, a multi-layer coil air conditioning unit may be referred to as a two-layer coil air conditioning unit, as shown in FIG. 3. In specific implementation, the multi-way electromagnetic valve can be formed by iteration of the three-way electromagnetic valve, and the specific structure of the multi-way electromagnetic valve is not limited herein.
The temperature measurer is a temperature sensor. In some embodiments, a temperature measuring device may be disposed in the conduits of the ambient and liquid supply tubes for measuring the ambient temperature and the temperature of the liquid in the liquid supply tubes. In other embodiments, the temperature measuring device may be further disposed in the air suction port and the cold source device of the air conditioning unit, and is configured to measure the ambient temperature and the temperature of the liquid in the liquid supply pipe.
The controller may be a Central Processing Unit (CPU), or other programmable general purpose or special purpose Microprocessor (Microprocessor), Digital Signal Processor (DSP), programmable controller, Application Specific Integrated Circuit (ASIC), or other similar components or combinations thereof, and the Specific type of the controller is not limited herein.
In an embodiment herein, the multi-layer coil air conditioning unit further includes: and the cold source equipment is respectively connected with the liquid supply pipe and is used for providing cold liquid for the liquid supply pipe. The cooling device includes a natural cooling source and a processed cooling source such as a refrigerator, which is not limited herein.
In an embodiment of the disclosure, in order to ensure that when at least one coil of the air conditioning unit does not work, for example, when the coil is maintained, the remaining coils can still operate in an optimal energy-saving manner, the controller is further configured to sequence the liquid supply pipes according to a sequence that the temperature of liquid in the liquid supply pipes increases from a low temperature to a high temperature, and by adjusting the on-off of the multi-way electromagnetic valve, N liquid supply pipes before the ranking are respectively connected to the coils that work, where N is the number of the coils that work. For example, when one coil pipe in the double-coil air conditioning unit is maintained, the other coil pipe is selectively connected to the liquid supply pipe with the lowest liquid temperature, so that normal and efficient energy-saving operation of refrigeration can be guaranteed.
In an embodiment of the disclosure, in order to ensure that when at least one liquid supply pipe of the air conditioning unit is stopped, the remaining liquid supply pipes can operate in an optimal energy-saving manner, the controller is further configured to select the liquid supply pipe that is not stopped according to a preset plan, and connect the liquid supply pipe that is not stopped into the plurality of coils by adjusting the opening and closing of the multi-way electromagnetic valve.
The preset plan specifies the temperature and number of the liquid supply pipes connected to the coils, for example, the first X liquid supply pipes with the lowest liquid temperature are connected to the X coils, where X is the number of the liquid stop supply pipes, for example, the first X1 liquid supply pipes with the lowest liquid temperature are connected to the X1 coils, and the X2 liquid supply pipes with the next lowest liquid temperature are connected to the X2 coils, and the specific content of the preset plan is not limited herein. Taking the double-layer coil air conditioning unit as an example, when the single-way liquid supply pipe stops liquid, the rest one-way liquid supply pipe can be used for supplying the double-layer coil.
The embodiment can ensure that the liquid supply pipe runs in an optimal energy-saving mode, and meanwhile, the redundancy of the coil pipe of the air conditioning unit can be kept.
In one embodiment, the ambient temperature refers to the temperature of the air flow in the room where the air conditioning unit is located, and the hot air in the room passes through the coil and becomes cold air to be blown back into the room. The controller adjusts the open and close of the multi-way electromagnetic valve according to the liquid temperature and the environment temperature in each liquid supply pipe, so that the liquid temperature accessed by each coil pipe is sequenced from large to small according to the flow direction of hot air flow, and the method comprises the following steps:
comparing the ambient temperature with the temperature of the liquid in each liquid supply tube;
if the ambient temperature is lower than the temperature of the liquid in each liquid supply pipe, which indicates that normal cooling can not be supplied, any multi-way electromagnetic valve is not opened;
if the environmental temperature is higher than the liquid temperature in each liquid supply pipe, which indicates that the cooling is normal, the switch of the electromagnetic valve is adjusted, so that the liquid temperatures accessed by the coil pipes are sequenced from large to small according to the flow direction of hot air flow;
if the ambient temperature is higher than the temperature of the liquid in at least one liquid supply pipe but not higher than the temperature of the liquid in each liquid supply pipe, which indicates that normal cooling can be performed, a supplementary liquid supply pipe is selected from the liquid supply pipes with the liquid temperature lower than the ambient temperature according to a preset plan, and the supplementary liquid supply pipes are connected into the plurality of coil pipes.
Further, in order to make the staff in time know air conditioning unit's behavior, multilayer coil pipe air conditioning unit still includes: the alarm is connected with the controller; when the ambient temperature is lower than the temperature of the liquid in each liquid supply pipe, the controller starts the alarm to give an alarm.
The control process is described below with the double-layer coil air conditioning unit and the liquid in the liquid supply pipe as water, and specifically, the temperature collected by the temperature measurement device includes a water supply temperature T of the a-way pipeAAnd TBRoad water temperature, and air temperature TAir conditionerThe controller is based on TA、TB、TAir conditionerThe following six temperature conditions can be judged:
1)Tair conditioner>TA>TBThe controller controls the on-off positions of the four electromagnetic valves as shown in fig. 5A, the front coil pipe is cooled by the air supply device A, and the rear coil pipe is cooled by the air supply device B. The controller can also control the display and other interactive equipment to prompt the user: the cooling is normal.
2)TAir conditioner>TB>TAAnd the controller controls the on-off positions of the four electromagnetic valves as shown in fig. 5B, the front coil pipe is cooled by the B, and the rear coil pipe is cooled by the A. The controller can also control the display and other interactive equipment to prompt the user: the cooling is normal.
3)TA>TB>TAir conditionerThe controller controls the on-off positions of the four electromagnetic valves to be as shown in figure 5C, the coils on the two sides are not subjected to water flow, and the controller can also control the alarm to prompt a user that the temperature of the A/B water is too high and normal cooling cannot be performed.
4)TA>TAir conditioner>TBThe controller controls the on-off positions of the four electromagnetic valves to be as shown in figure 5D, the coils on the two sides are supplied with water by the B path, and the controller can also control the display and other interactive equipment to prompt the user that the temperature of the water on the A path is too high and the water on the B path is used for cooling.
5)TB>TA>TAir conditionerThe controller controls the on-off positions of the four electromagnetic valves to be as shown in fig. 5E, the coils on the two sides are not subjected to water flow, and the controller can also control the alarm to prompt a user that the temperature of the A/B water is too high and normal cooling cannot be performed.
6)TB>TAir conditioner>TAThe controller controls the on-off positions of the four electromagnetic valves to be as shown in fig. 5F, the coils on both sides are supplied with water by the path A, and the controller can also control the display and other interactive equipment to prompt a user that the temperature of water on the path B is too high and only the temperature of water on the path A is used for cooling.
In a further embodiment of this document, in order to ensure the cooling effect in the room, and in the case that the temperature cannot be adjusted normally, the temperature adjustment is resumed as soon as possible, the multi-layer coil air conditioning unit further includes: the communication module is connected with the controller and cold source equipment connected with the liquid supply pipe;
when the environmental temperature is lower than the temperature of the liquid in each liquid supply pipe, the controller sends a command for adjusting the temperature of the cold source to the cold source equipment by the communication module. After receiving the instruction of adjusting the temperature of the cold source, the cold source equipment adjusts the refrigeration capacity of the cold source equipment, so that the provided cold liquid can be lower than the ambient temperature, and the refrigeration capacity is recovered.
In an embodiment of the present disclosure, a method for adjusting a position of a coil of a multi-layer coil air conditioning unit is further provided, where the method is applied to the multi-layer coil air conditioning unit described in any of the foregoing embodiments, and the method is applied to a control device in a form of a program or an application, such as a controller, a desktop computer, a tablet computer, a laptop computer, a smart phone, a digital assistant, a smart wearable device, and the like. Specifically, as shown in fig. 6, the method for adjusting the position of the coils of the multi-layer coil air conditioning unit includes:
601, collecting the liquid temperature and the ambient temperature in each liquid supply pipe;
step 602, adjusting the on-off of the multi-way electromagnetic valve according to the liquid temperature in each liquid supply pipe and the ambient temperature, so that each coil pipe is only connected with one liquid supply pipe and one liquid return pipe, and the liquid temperature connected with each coil pipe is arranged from large to small according to the flow direction of hot air flow.
In detail, the adjustment of the coil position in the multi-layer coil air conditioning unit described herein does not refer to the adjustment of the physical position of the coil, but refers to the adjustment of the temperature of the liquid connected into the coil, and the adjustment is based on the principle that the temperature of the liquid connected into the coil is ordered from large to small according to the flow direction of the hot air flow.
The execution process of step 602 includes: comparing the ambient temperature with the temperature of the liquid in each liquid supply tube;
if the environmental temperature is lower than the liquid temperature in each liquid supply pipe, any multi-way electromagnetic valve is not opened;
if the environmental temperature is higher than the liquid temperature in each liquid supply pipe, the switch of the electromagnetic valve is adjusted, so that the liquid temperatures accessed by the coil pipes are sequenced from large to small according to the flow direction of hot air flow;
and if the ambient temperature is higher than the temperature of the liquid in at least one liquid supply pipe but not higher than the temperature of the liquid in each liquid supply pipe, selecting a supplementary liquid supply pipe from the liquid supply pipes with the liquid temperature lower than the ambient temperature according to a preset plan, and connecting the supplementary liquid supply pipes into the plurality of coil pipes.
Through implementation, the self-adaptive adjustment of the positions of the multilayer coil pipes can be realized according to the temperature of liquid in the liquid supply pipe and the ambient temperature, the temperature of the front side coil pipes of the multilayer coil pipes is relatively high, the temperature of the rear side coil pipes is relatively low (the front side coil pipes refer to the direction of entering hot air flow, and the rear side refers to the direction of flowing out cold air flow), and energy can be saved.
In an embodiment of this document, the method for adjusting the position of the coils of the multi-layer coil air conditioning unit further includes, in addition to the steps 601 to 602:
and 603, when at least one coil does not work, sequencing the liquid supply pipes according to the sequence of the temperature of the liquid in the liquid supply pipes from small to large, and respectively connecting N liquid supply pipes before ranking to the working coils by adjusting the opening and closing of the multi-way electromagnetic valve, wherein N is the number of the working coils.
And step 604, when at least one liquid supply pipe stops, selecting the liquid supply pipe which does not stop according to a preset plan, and connecting the liquid supply pipe which does not stop to the plurality of coil pipes by adjusting the opening and closing of the multi-way electromagnetic valve.
Based on the same inventive concept, the present invention also provides a device for adjusting the position of the coils of the multi-layer coil air conditioning unit, as described in the following embodiments. Because the principle of solving the problems of the adjusting device for the position of the coil of the multilayer coil air-conditioning unit is similar to the adjusting method for the position of the coil of the multilayer coil air-conditioning unit, the implementation of the adjusting device for the position of the coil of the multilayer coil air-conditioning unit can refer to the adjusting method for the position of the coil of the multilayer coil air-conditioning unit, and repeated parts are not repeated.
The adjusting device for the position of the coil of the multi-layer coil air conditioning unit provided by this embodiment includes a plurality of functional modules, which may be implemented by dedicated or general chips, and may also be implemented by software programs, which is not limited herein.
Specifically, the adjusting device of multilayer coil pipe air conditioning unit coil pipe position includes:
the acquisition module acquires the liquid temperature and the ambient temperature in each liquid supply pipe;
and the control module adjusts the opening and closing of the multi-way electromagnetic valve according to the liquid temperature and the environment temperature in each liquid supply pipe, so that each coil pipe is only connected into one liquid supply pipe and one liquid return pipe, and the liquid temperature connected into each coil pipe is arranged from large to small according to the flow direction of hot air flow.
In an embodiment herein, a computer device for installing a device for adjusting the position of the coils of a multi-layer coil air conditioning unit or performing the method for adjusting the position of the coils of the multi-layer coil air conditioning unit shown in fig. 6 is also provided, and as shown in fig. 7, the computer device 702 may include one or more processors 704, such as one or more Central Processing Units (CPUs), each of which may implement one or more hardware threads. The computer device 702 may also include any memory 706 for storing any kind of information, such as code, settings, data, etc. For example, and without limitation, the memory 706 can include any one or more of the following in combination: any type of RAM, any type of ROM, flash memory devices, hard disks, optical disks, etc. More generally, any memory may use any technology to store information. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent fixed or removable components of computer device 702. In one case, when the processor 704 executes associated instructions that are stored in any memory or combination of memories, the computer device 702 can perform any of the operations of the associated instructions. The computer device 702 also includes one or more drive mechanisms 708, such as a hard disk drive mechanism, an optical disk drive mechanism, or the like, for interacting with any memory.
Computer device 702 can also include an input/output module 710(I/O) for receiving various inputs (via input device 712) and for providing various outputs (via output device 714)). One particular output mechanism may include a presentation device 716 and an associated graphical user interface 718 (GUI). In other embodiments, input/output module 710(I/O), input device 712, and output device 714 may also not be included, as only one computer device in a network. Computer device 702 can also include one or more network interfaces 720 for exchanging data with other devices via one or more communication links 722. One or more communication buses 724 couple the above-described components together.
Communication link 722 may be implemented in any manner, such as over a local area network, a wide area network (e.g., the Internet), a point-to-point connection, etc., or any combination thereof. Communication link 722 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc., governed by any protocol or combination of protocols.
Corresponding to the method in fig. 6, the embodiments herein also provide a computer-readable storage medium having stored thereon a computer program, which, when executed by a processor, performs the steps of the above-described method.
Embodiments herein also provide computer readable instructions, wherein a program therein causes a processor to perform the method as shown in fig. 6 when the instructions are executed by the processor.
It should be understood that, in various embodiments herein, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments herein.
It should also be understood that, in the embodiments herein, the term "and/or" is only one kind of association relation describing an associated object, meaning that three kinds of relations may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided herein, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments herein.
In addition, functional units in the embodiments herein may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present invention may be implemented in a form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The principles and embodiments of this document are explained herein using specific examples, which are presented only to aid in understanding the methods and their core concepts; meanwhile, for the general technical personnel in the field, according to the idea of this document, there may be changes in the concrete implementation and the application scope, in summary, this description should not be understood as the limitation of this document.

Claims (10)

1. A multi-layer coil air conditioning unit, comprising: the device comprises a plurality of liquid supply pipes, a plurality of liquid return pipes, a plurality of layers of coil pipes, a plurality of multi-way electromagnetic valves, a temperature measurer and a controller;
the inlet and the outlet of each layer of coil pipe are respectively connected with one end of a multi-way electromagnetic valve, the other ends of the multi-way electromagnetic valve connected with the inlet of the coil pipe are respectively connected with a liquid supply pipe, and the other ends of the multi-way electromagnetic valve connected with the outlet of the coil pipe are respectively connected with a liquid return pipe;
the temperature measurer is used for measuring the liquid temperature in the liquid supply pipe and the ambient temperature;
the controller is connected with the multi-way electromagnetic valve and the temperature measurer and used for adjusting the opening and closing of the multi-way electromagnetic valve according to the liquid temperature in each liquid supply pipe and the ambient temperature so that each coil pipe is only connected with one liquid supply pipe and one liquid return pipe, and the liquid temperature connected with each coil pipe is arranged from large to small according to the flow direction of hot air flow.
2. The multi-layer coil air conditioning unit as set forth in claim 1, further including: and the cold source equipment is respectively connected with the liquid supply pipe and is used for providing cold liquid for the liquid supply pipe.
3. The multi-layer coil air conditioning unit as claimed in claim 1, wherein when at least one coil is not working, the controller is further configured to sequence the liquid supply pipes according to a sequence from a low temperature to a high temperature of the liquid in the liquid supply pipes, and by adjusting the on-off of the multi-way solenoid valve, N liquid supply pipes before the ranking are respectively connected to the working coils, where N is the number of the working coils.
4. The multi-layer coil air conditioning unit as recited in claim 1 wherein when there is at least one supply tube that is out of service, the controller is further configured to select an un-out of service supply tube according to a predetermined schedule and switch the un-out of service supply tube to the plurality of coils by adjusting the on and off of the multi-way solenoid valve.
5. The multi-layer coil air conditioning unit according to claim 1, wherein the controller adjusts the multi-way solenoid valve to open and close according to the temperature of the liquid in each liquid supply pipe and the ambient temperature, so that the temperature of the liquid in each coil is sequenced from large to small according to the flow direction of the hot air flow, and the multi-layer coil air conditioning unit comprises:
comparing the ambient temperature with the temperature of the liquid in each liquid supply tube;
if the environmental temperature is lower than the liquid temperature in each liquid supply pipe, any multi-way electromagnetic valve is not opened;
if the environmental temperature is higher than the liquid temperature in each liquid supply pipe, the switch of the electromagnetic valve is adjusted, so that the liquid temperatures accessed by the coil pipes are sequenced from large to small according to the flow direction of hot air flow;
and if the ambient temperature is higher than the temperature of the liquid in at least one liquid supply pipe but not higher than the temperature of the liquid in each liquid supply pipe, selecting a supplementary liquid supply pipe from the liquid supply pipes with the liquid temperature lower than the ambient temperature according to a preset plan, and connecting the supplementary liquid supply pipes into the plurality of coil pipes.
6. The multi-layer coil air conditioning unit as set forth in claim 5, further comprising: the alarm is connected with the controller;
and when the ambient temperature is lower than the temperature of the liquid in each liquid supply pipe, the controller starts an alarm to give an alarm.
7. The multi-layer coil air conditioning unit as set forth in claim 6, further comprising: the communication module is connected with the controller and cold source equipment connected with the liquid supply pipe;
when the environment temperature is lower than the liquid temperature in each liquid supply pipe, the controller sends a cold source temperature adjusting instruction to the cold source equipment through the communication module.
8. A method for adjusting the position of the coil of the multi-layer coil air conditioning unit, which is suitable for the multi-layer coil air conditioning unit of any one of claims 1 to 7, and comprises the following steps:
collecting the liquid temperature and the ambient temperature in each liquid supply pipe;
and adjusting the opening and closing of the multi-way electromagnetic valve according to the liquid temperature in each liquid supply pipe and the ambient temperature so that each coil pipe is only connected with one liquid supply pipe and one liquid return pipe, and the liquid temperature connected with each coil pipe is arranged from large to small according to the flow direction of hot air flow.
9. A computer device comprising a memory, a processor, and a computer program stored on the memory, wherein the computer program, when executed by the processor, performs the instructions of the method of claim 8.
10. A computer storage medium on which a computer program is stored, characterized in that the computer program, when being executed by a processor of a computer device, executes instructions of a method according to claim 8.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003279192A (en) * 2002-03-26 2003-10-02 Sanyo Electric Co Ltd Air-conditioner
JP2004353949A (en) * 2003-05-29 2004-12-16 Sanyo Electric Co Ltd Air conditioner
CN102878619A (en) * 2012-10-25 2013-01-16 上海京瓷电子有限公司 Energy-saving air conditioner
CN203464410U (en) * 2013-09-04 2014-03-05 深圳市中航装饰设计工程有限公司 Energy-saving device for controlling heating and cooling of central air conditioner
CN204153891U (en) * 2014-03-24 2015-02-11 深圳市易信科技有限公司 A kind of rack automatic temperature-controlled pair of low-temperature receiver fan coil
CN110360660A (en) * 2018-04-10 2019-10-22 苏州市谷藤建筑工程有限公司 A kind of family and business use furred ceiling coiled intelligence air conditioner with air purification system
CN111536585A (en) * 2020-05-19 2020-08-14 宁波奥克斯电气股份有限公司 Air conditioner and sterilization and disinfection method
CN212409023U (en) * 2020-04-24 2021-01-26 杭州速智美自动化机械科技有限公司 Multifunctional double-coil air handling unit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003279192A (en) * 2002-03-26 2003-10-02 Sanyo Electric Co Ltd Air-conditioner
JP2004353949A (en) * 2003-05-29 2004-12-16 Sanyo Electric Co Ltd Air conditioner
CN102878619A (en) * 2012-10-25 2013-01-16 上海京瓷电子有限公司 Energy-saving air conditioner
CN203464410U (en) * 2013-09-04 2014-03-05 深圳市中航装饰设计工程有限公司 Energy-saving device for controlling heating and cooling of central air conditioner
CN204153891U (en) * 2014-03-24 2015-02-11 深圳市易信科技有限公司 A kind of rack automatic temperature-controlled pair of low-temperature receiver fan coil
CN110360660A (en) * 2018-04-10 2019-10-22 苏州市谷藤建筑工程有限公司 A kind of family and business use furred ceiling coiled intelligence air conditioner with air purification system
CN212409023U (en) * 2020-04-24 2021-01-26 杭州速智美自动化机械科技有限公司 Multifunctional double-coil air handling unit
CN111536585A (en) * 2020-05-19 2020-08-14 宁波奥克斯电气股份有限公司 Air conditioner and sterilization and disinfection method

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