CN109681973B - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
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- CN109681973B CN109681973B CN201910016628.3A CN201910016628A CN109681973B CN 109681973 B CN109681973 B CN 109681973B CN 201910016628 A CN201910016628 A CN 201910016628A CN 109681973 B CN109681973 B CN 109681973B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 36
- 239000003507 refrigerant Substances 0.000 claims abstract description 158
- 238000005057 refrigeration Methods 0.000 claims abstract description 26
- 238000012423 maintenance Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 31
- 238000001816 cooling Methods 0.000 claims description 23
- 238000009434 installation Methods 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- 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
-
- 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
- F24F2110/12—Temperature of the outside air
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of machine room air conditioners, in particular to an air conditioning system. The whole system has no single-point fault, and when the fault or maintenance occurs locally, the operation of the whole system is not influenced, and uninterrupted continuous refrigeration can be ensured. An air conditioning system, comprising: the indoor unit module, the outdoor unit module, the first loop pipe and the second loop pipe; the indoor unit module comprises a plurality of refrigerating tail ends, a refrigerant inlet of each refrigerating tail end is communicated with the first annular pipe, and a refrigerant outlet is communicated with the second annular pipe; the outdoor unit module comprises a plurality of outdoor loop units, a refrigerant inlet of each outdoor loop unit is communicated with the second loop pipe, and a refrigerant outlet is communicated with the first loop pipe; the first annular pipe between every two adjacent refrigerating tail ends is provided with a first refrigerant cut-off valve, the second annular pipe between every two adjacent refrigerating tail ends is provided with a second refrigerant cut-off valve, and at least two outdoor loop units among the plurality of outdoor loop units are respectively communicated with different pipe sections on the first annular pipe and the second annular pipe.
Description
Technical Field
The invention relates to the technical field of machine room air conditioners, in particular to an air conditioning system.
Background
Along with the rapid development of communication network construction, the number of machine rooms and base stations is promoted, the construction scale is rapidly increased, generally speaking, the sensible heat load ratio of the machine rooms and the base stations is large, the machine rooms and the base stations need to continuously run throughout the year, and meanwhile, the air conditioning equipment is mainly configured in the machine rooms and the base stations in an ultra-large capacity mode so as to meet the heat dissipation requirements of the machine rooms and the base stations.
At present, a multi-connected air conditioning system is generally adopted for machine room and base station air conditioning, namely, the multi-connected air conditioning system consists of one or more outdoor units and a plurality of indoor units, and energy conversion and transportation are carried out by means of circulating flow of refrigerant in front of the indoor units and the outdoor units. In a multi-connected air conditioning system, an indoor unit and an outdoor unit are generally connected in series to form a closed loop, for example, a plurality of indoor units are connected in parallel to form an indoor unit, then a refrigerant inlet of the indoor unit is connected with a refrigerant outlet of one outdoor unit, a refrigerant outlet of the indoor unit is connected with a refrigerant inlet of the outdoor unit to form a closed loop, or a plurality of indoor units are connected in parallel to form an indoor unit, a plurality of outdoor units are connected in parallel to form an outdoor unit, then a refrigerant inlet of the indoor unit is connected with a refrigerant outlet of the outdoor unit, and a refrigerant inlet of the outdoor unit is connected with a refrigerant outlet of the indoor unit to form a closed loop. When a fault occurs locally in the system or maintenance is performed, the whole system stops running, and particularly when refrigerant leakage occurs locally in a closed loop, the running of the whole system can be influenced, and uninterrupted refrigeration cannot be guaranteed.
Disclosure of Invention
In order to solve the technical problems, the invention provides an air conditioning system, wherein the whole system has no single-point fault, and when a part is in fault or maintenance, the operation of the whole system is not influenced, so that uninterrupted continuous refrigeration can be ensured.
An embodiment of the present invention provides an air conditioning system, including: the indoor unit module, the outdoor unit module, the first loop pipe and the second loop pipe; the indoor unit module comprises a plurality of refrigerating tail ends, a refrigerant inlet of each refrigerating tail end is communicated with the first annular pipe, and a refrigerant outlet is communicated with the second annular pipe; the outdoor unit module comprises a plurality of outdoor loop units, a refrigerant inlet of each outdoor loop unit is communicated with the second loop pipe, and a refrigerant outlet is communicated with the first loop pipe; the refrigerant inlet of at least two outdoor loop units among the outdoor loop units is respectively communicated with different pipe sections defined by the two adjacent refrigerant stop valves on the first loop, and the refrigerant outlet is respectively communicated with different pipe sections defined by the two adjacent refrigerant stop valves on the second loop.
Optionally, the refrigerating capacity and the installation mode of the plurality of refrigerating tail ends are the same; or, the refrigerating capacity and the installation mode of at least two refrigerating terminals in the plurality of refrigerating terminals are different.
Optionally, the plurality of refrigerating terminals are respectively selected from any one or more of an inter-column unit, a back plate unit, a suspended ceiling unit and an embedded unit.
Optionally, each refrigeration terminal comprises at least one evaporator assembly, and a first throttling device and a flowmeter are arranged at the refrigerant inlet of each evaporator assembly; the air conditioning system further comprises an indoor controller which is respectively connected with the first throttling device and the flowmeter and used for adjusting the opening of the first throttling device according to the set indoor temperature and the flow signal detected by the flowmeter.
Optionally, each of the outdoor loop units includes a communication pipe having a refrigerant inlet and a refrigerant outlet, a condenser assembly, and a compressor assembly; the condenser assembly at least comprises a liquid-liquid heat exchanger arranged on the communicating pipeline, one passage of the liquid-liquid heat exchanger is communicated with the communicating pipeline, and the other passage is communicated with the compressor assembly in series.
Optionally, the condenser assembly further comprises an air cooling coil arranged between the refrigerant inlet of the communicating pipe and the liquid-liquid heat exchanger, and the air cooling coil is communicated with one of the passages of the liquid-liquid heat exchanger in series through the communicating pipe.
Optionally, the compressor assembly includes a compressor, a condenser, and a second throttling device in serial communication in sequence; wherein, the forced air cooling coil pipe with the condenser is mutual superpose, and share a fan.
Optionally, each of the outdoor circuit units further includes a delivery pump disposed between the condenser assembly and the refrigerant outlet of the communication pipe; the communication pipeline in each outdoor loop unit between the refrigerant inlet and the condenser assembly is communicated with the communication pipeline in at least one other outdoor loop unit between the refrigerant inlet and the condenser assembly, and a refrigerant cut-off valve III is arranged on the communication pipeline; and a communicating pipeline positioned between the refrigerant outlet and the delivery pump in each outdoor loop unit is mutually communicated with a communicating pipeline positioned between the refrigerant outlet and the delivery pump in at least one other outdoor loop unit, and a refrigerant cut-off valve IV is arranged on the communicated pipeline.
Optionally, in the plurality of outdoor circuit units, a communication pipe in each of the outdoor circuit units between the condenser assembly and the delivery pump is in communication with a communication pipe in at least one other outdoor circuit unit between the condenser assembly and the delivery pump.
Optionally, the air conditioning system further comprises an outdoor controller and an outdoor temperature detector, wherein the outdoor controller is respectively connected with the outdoor temperature detector, the delivery pump and the compressor assembly, and is used for controlling the opening and closing of the compressor assembly and the refrigerant flow of the compressor assembly and the delivery pump according to the temperature detected by the outdoor temperature detector.
The embodiment of the invention provides an air conditioning system, which is characterized in that a first loop pipe and a second loop pipe are arranged, a plurality of refrigerating tail ends and a plurality of outdoor loop units are respectively communicated with the first loop pipe and the second loop pipe in parallel, when in refrigeration, a refrigerant circulates between an indoor unit module and an outdoor unit module, absorbs heat by evaporation of the indoor unit module through phase change to become a gaseous refrigerant, then enters the outdoor unit module after being collected in the second loop pipe for condensation and liquefaction, becomes a liquid refrigerant, and then enters the indoor unit module after being collected in the first loop pipe for continuous evaporation and heat absorption, so that the indoor heat is absorbed and discharged outdoors continuously. Meanwhile, as the first annular pipe between the refrigerant inlets of every two adjacent refrigerating tail ends is provided with the first refrigerant cut-off valve, the second annular pipe between the refrigerant outlets of every two adjacent refrigerating tail ends is provided with the second refrigerant cut-off valve, and in the plurality of outdoor loop units, the refrigerant inlets of at least two outdoor loop units are respectively communicated with different pipe sections defined by the first adjacent two refrigerant cut-off valves on the first annular pipe, and the refrigerant outlets are respectively communicated with different pipe sections defined by the second adjacent two refrigerant cut-off valves on the second annular pipe, the whole system has no single-point fault, and when the local fault or maintenance occurs, the fault part can be isolated by cutting off the first refrigerant cut-off valve and the second refrigerant cut-off valve, and the operation of the whole system can not be influenced, so that uninterrupted continuous refrigeration can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
An embodiment of the present invention provides an air conditioning system, referring to fig. 1, including: an indoor unit module 1, an outdoor unit module, a first loop pipe 3 and a second loop pipe 4; the indoor unit module 1 comprises a plurality of refrigerating tail ends 11, a refrigerant inlet of each refrigerating tail end 11 is communicated with the first annular pipe 3, and a refrigerant outlet is communicated with the second annular pipe 4; the outdoor unit module comprises a plurality of outdoor loop units, a refrigerant inlet of each outdoor loop unit is communicated with the second loop pipe 4, and a refrigerant outlet is communicated with the first loop pipe 3; the first annular pipe 3 between the refrigerant inlets of every two adjacent refrigerating tail ends 11 is provided with a refrigerant cut-off valve A, the second annular pipe 4 between the refrigerant outlets of every two adjacent refrigerating tail ends 11 is provided with a refrigerant cut-off valve B, and the refrigerant inlets of at least two outdoor loop units are respectively communicated with different pipe sections defined by the two adjacent refrigerant cut-off valves A on the first annular pipe 3, and the refrigerant outlets are respectively communicated with different pipe sections defined by the two adjacent refrigerant cut-off valves B on the second annular pipe 4.
When the number of the refrigerating ends 11 is two, the first loop 3 is divided into two pipe sections by the refrigerant inlets of the two refrigerating ends 11, and at this time, the refrigerant inlets of at least two outdoor loop units can be respectively communicated with the two different pipe sections.
When the number of the refrigerating terminals 11 is plural, taking three as an example, the first loop 3 is divided into three pipe sections by the refrigerant inlets of the three refrigerating terminals 11, at this time, the refrigerant inlets of at least two outdoor loop units may be respectively communicated with any two different pipe sections of the three different pipe sections, for example, one of the outdoor loop units is communicated with one of the pipe sections, and the other two outdoor loop units are respectively communicated with another pipe section of the three different pipe sections, or the refrigerant inlets of the outdoor loop units may be respectively communicated with the three different pipe sections in a one-to-one correspondence.
The embodiment of the invention provides an air conditioning system, which is characterized in that a first loop pipe 3 and a second loop pipe 4 are arranged, a plurality of refrigerating tail ends 11 and a plurality of outdoor loop units are respectively communicated with the first loop pipe 3 and the second loop pipe 4 in parallel, when in refrigeration, a refrigerant circulates between an indoor unit module 1 and an outdoor unit module, is changed into a gaseous refrigerant through phase change and absorbs heat by evaporation in the indoor unit module 1, then is collected in the second loop pipe 4 and enters the outdoor unit module for condensation and liquefaction, is changed into a liquid refrigerant, is collected in the first loop pipe 3 and enters the indoor unit module 1 for continuous evaporation and heat absorption, and is continuously circulated to absorb and discharge indoor heat to the outside. Meanwhile, as the first annular pipe 3 between the refrigerant inlets of every two adjacent refrigerating tail ends 11 is provided with the first refrigerant cut-off valve a, the second annular pipe 4 between the refrigerant outlets of every two adjacent refrigerating tail ends 11 is provided with the second refrigerant cut-off valve b, and in the plurality of outdoor loop units, the refrigerant inlets of at least two outdoor loop units are respectively communicated with different pipe sections defined by the first adjacent two refrigerant cut-off valves a on the first annular pipe 3, and the refrigerant outlets are respectively communicated with different pipe sections defined by the second adjacent two refrigerant cut-off valves b on the second annular pipe 4, the whole system has no single-point fault, and when the fault or maintenance occurs locally, the fault part can be isolated by cutting off the first refrigerant cut-off valve a and the second refrigerant cut-off valve b, and the operation of the whole system can not be influenced, so that uninterrupted continuous refrigeration can be ensured.
For example, when a certain refrigerating terminal 11 fails to be maintained or replaced, the first refrigerant cut-off valve a at the two ends of the refrigerant inlet of the refrigerating terminal 11 can be closed, and the second refrigerant cut-off valve b at the two ends of the refrigerant outlet of the refrigerating terminal 11 can be closed, so that the normal operation of other refrigerating terminals 11 is not affected.
In an embodiment of the present invention, the refrigerating capacity and the installation manner of the plurality of refrigerating terminals 11 are the same, or the refrigerating capacity and the installation manner of at least two refrigerating terminals 11 in the plurality of refrigerating terminals 11 are different. Access to the refrigerated end 11 can be achieved in a number of different mounting forms.
Illustratively, the plurality of refrigeration terminals 11 are each selected from any one or more of inter-column units, back-plate units, ceiling-mounted units, and embedded units. The inter-column unit is also called inter-row refrigerating unit, which is a precise refrigerating system specially aiming at a high-heat-density rack, and the refrigerating efficiency is improved because the unit is close to a heat source, so that the base return air temperature and the evaporating pressure are improved. The back plate type unit is a refrigerating unit arranged on the back of the data center frame. The suspended ceiling type unit can be horizontally arranged in the suspended ceiling interlayer, and can filter, cool and dehumidify air and introduce fresh air. The embedded unit is a refrigerating unit installed in an embedded mode. The refrigerating terminals 11 can be any one of an inter-column type unit, a back plate type unit, a ceiling type unit and an embedded type unit, namely, refrigerating capacity and an installation mode of the refrigerating terminals 11 are the same, the refrigerating terminals 11 can be any one of the inter-column type unit, the back plate type unit, the ceiling type unit and the embedded type unit, for example, 3 of the refrigerating terminals 11 can be the inter-column type unit, 2 of the refrigerating terminals 11 can be the ceiling type unit, 4 of the refrigerating terminals 11 can be the inter-column type unit, and the other 1 can be the back plate type unit, namely, refrigerating capacity and the installation mode of at least two refrigerating terminals 11 in the refrigerating terminals 11 are different.
Further, in order to facilitate the post expansion, the first loop pipe 3 and the second loop pipe 4 are further reserved with a refrigerant interface, as shown in fig. 1, a refrigerant inlet pipe I and a refrigerant outlet pipe II.
The specific structure of each cooling tip 11 is not limited herein.
In one embodiment of the present invention, each refrigeration terminal 11 includes at least one evaporator assembly 111, and a first throttling device 112 and a flowmeter are disposed at the refrigerant inlet of each evaporator assembly 111; the air conditioning system further includes an indoor controller connected to the first throttling device 112 and the flow meter, respectively, for adjusting the opening of the first throttling device 112 according to the set indoor temperature and the flow signal detected by the flow meter.
In the embodiment of the present invention, by arranging the first throttling device 112 and the flowmeter at the refrigerant inlet of each evaporator assembly 111, and the corresponding controller, the refrigerant flow and the refrigerating capacity can be precisely controlled, and the distribution according to the needs can be realized.
When the refrigeration end 11 includes at least two evaporator assemblies 111, the at least two evaporator assemblies 111 are respectively communicated with the first loop 3 and the second loop 4 and are mutually independent, a first valve 113 is disposed at a refrigerant inlet of each evaporator assembly 111, and a second valve 114 is disposed at a refrigerant outlet. Thus, when the first valve 113 and the second valve 114 of one evaporator assembly 111 are closed for maintenance while the other evaporator assembly 111 is in failure, the continuous operation of the other evaporator assembly 111 is not affected.
The specific structure of the outdoor circuit unit is not limited, and the refrigerant phase change and the circulating refrigeration can be realized as long as the heat exchange can be performed on the gaseous refrigerant flowing out of the indoor side.
In one embodiment of the present invention, each outdoor circuit unit includes a communication pipe 211 having a refrigerant inlet and a refrigerant outlet, a condenser assembly 212, and a compressor assembly 213, wherein the condenser assembly 212 includes at least a liquid-liquid heat exchanger 2121 disposed on the communication pipe 211; one of the passages in the liquid-liquid heat exchanger 2121 communicates with the communicating pipe 211, and the other passage communicates with the compressor assembly 213 in series.
In the embodiment of the present invention, by providing the liquid-liquid heat exchanger 2121 and connecting one passage of the liquid-liquid heat exchanger 2121 to the communication pipe 211 and connecting the other passage to the compressor assembly 213 in series, the compressor assembly 213 is not turned on to perform mechanical refrigeration when the outdoor temperature is sufficiently low, only the refrigerant is allowed to flow through the liquid-liquid heat exchanger 2121 to perform air refrigeration, and the compressor assembly 213 is turned on to perform mechanical refrigeration when the outdoor temperature is high, thereby improving energy efficiency.
In yet another embodiment of the present invention, the condenser assembly 212 further comprises an air-cooled coil 2122 disposed between the refrigerant inlet of the communication line 211 and the liquid-liquid heat exchanger 2121, the air-cooled coil 2122 being in series communication with one of the passages of the liquid-liquid heat exchanger 2121 through the communication line 211.
Normally, when the temperature of the air at the return side of the indoor cooling end 11 is T0, the refrigerant in the second loop 4 is condensed into a liquid state, and the temperature T is about 12-25 ℃ lower than T0, which is described in detail by taking T0-t=20 ℃.
Assuming that the temperature of the air at the indoor return side is 35 ℃, the temperature of the liquid refrigerant is 15 ℃, the liquid refrigerant is depressurized through the first throttling device 112 and then enters the refrigerating end 11, absorbs heat in the air, evaporates into a gaseous state and enters the first loop 3, and the air at the refrigerating end 11 is condensed, so that the temperature at the indoor return side is reduced to about 20 ℃.
In the embodiment of the invention, by arranging the air cooling coil 2122 at the front side of the liquid-liquid heat exchanger 2121, when the outdoor temperature Te is lower than or equal to T-10 ℃ in winter, for example, the gaseous refrigerant enters the air cooling coil 2122 to perform air cooling, and then flows through the liquid-liquid heat exchanger 2121 to continue air cooling, the compressor assembly 213 is not started to perform mechanical cooling, and the liquid refrigerant can be changed into the liquid refrigerant only by making the refrigerant flow through the liquid-liquid heat exchanger 2121 to perform air cooling, which is a natural cooling mode, and when the outdoor temperature Te is higher, for example, in spring and autumn, when the outdoor ambient temperature Te is higher than or equal to T-10 ℃ and lower than T, part of the gaseous refrigerant becomes liquid after being air-cooled in the air cooling coil 2122, and the other part of the gaseous refrigerant becomes liquid after being mechanically cooled in the liquid-liquid heat exchanger 2121 by the compressor assembly, which is a mixed cooling mode, and when the outdoor temperature Te is higher enough, for example, summer, when the outdoor ambient temperature Te is higher than T, the gaseous refrigerant cannot be condensed in the air cooling coil 2122, and then enters the liquid-liquid heat exchanger 2121 to be completely cooled by the compressor assembly 213, and is completely cooled by the compressor assembly.
Therefore, in the embodiment of the invention, natural cooling and mechanical refrigeration can be fully matched, so that the energy efficiency can be further improved, meanwhile, as only heat exchange exists between the natural cooling circulation passage and the mechanical refrigeration passage of the compressor, the mechanical refrigeration passage of the compressor is not required to be communicated to the indoor side, the problem of long-pipe oil return caused by the communication between the mechanical refrigeration of the traditional compressor and the indoor side is solved, the operation is more reliable, and the pipe distribution is more flexible.
Further, the condenser assembly 212 and the compressor assembly 213 of each outdoor circuit unit can be integrated together, and can be placed on a balcony, or can be placed remotely, so that the installation and operation are more convenient.
In yet another embodiment of the present invention, the compressor assembly 213 comprises a compressor 2131, a condenser 2132 and a second throttling device 2133 in serial communication in sequence, wherein the air cooling coil 2122 and the condenser 2132 are stacked on top of each other and share a fan 214. The energy efficiency can be further improved.
In yet another embodiment of the present invention, each outdoor circuit unit further includes a delivery pump 215, the delivery pump 215 being disposed between the condenser assembly 212 and the refrigerant outlet of the outdoor circuit unit; a communicating pipe (a portion shown as 2111 in fig. 1) between the refrigerant inlet and the condenser assembly 212 in each of the outdoor circuit units is communicated with a communicating pipe between the refrigerant inlet and the condenser assembly 212 in at least one other outdoor circuit unit, and a refrigerant shut-off valve tri c is provided on the communicating pipe; a communication pipe (a portion shown as 2112 in fig. 1) between the refrigerant outlet and the delivery pump 215 in each of the outdoor circuit units is communicated with a communication pipe between the refrigerant outlet and the delivery pump 215 in at least one other outdoor circuit unit, and a refrigerant shut-off valve four d is provided on the communicated pipe.
In the embodiment of the present invention, the transfer pump 215 is capable of overcoming the resistance of the long tube, providing a certain pressure for the liquid refrigerant, providing sufficient pressure for the liquid refrigerant to enter each refrigeration end 11, and simultaneously, communicating the communication pipeline between the refrigerant inlet and the condenser assembly 212 in each outdoor loop unit with the communication pipeline between the refrigerant inlet and the condenser assembly 212 in at least one other outdoor loop unit, wherein the communication pipeline is provided with a refrigerant cut-off valve tri c; the communication pipeline between the refrigerant outlet and the delivery pump 215 in each outdoor loop unit is mutually communicated with the communication pipeline between the refrigerant outlet and the delivery pump 215 in at least one other outdoor loop unit, and the communication pipeline is provided with the refrigerant cut-off valve four d, so that backup operation between the outdoor loop units can be realized when the communication pipeline of any outdoor loop unit fails for maintenance, normal operation of the whole system is not influenced, and long-tube single-point fault hidden danger is eliminated.
The number of the outdoor loop units can be two as shown in fig. 1, so that each outdoor loop unit can bear the refrigerant flow in full-load refrigeration, and when a certain outdoor loop unit fails and needs to be maintained, the other outdoor loop unit can be switched to operate, and the normal operation of the whole system is not affected.
Further, among the plurality of outdoor circuit units, the communication pipe in each of the outdoor circuit units between the condenser assembly 212 and the feed pump 215 is in communication with the communication pipe in at least one other outdoor circuit unit between the condenser assembly 212 and the feed pump 215. When any one of the delivery pump 215 or the condenser assembly 212 fails to perform maintenance, the operation can be switched to the other delivery pump 215 or the condenser assembly 212 to perform backup operation, and the normal operation of the whole system is affected.
The delivery pump 215 may be a positive displacement refrigerant pump, the delivery pump 215 may be connected with a variable frequency driver, a corresponding sensor and a controller, and an input end and an output end of the delivery pump 215 may be provided with a check valve and a drying filter.
In still another embodiment of the present invention, the air conditioning system further includes an outdoor controller and an outdoor temperature sensor, wherein the outdoor controller is connected to the outdoor temperature sensor, the delivery pump 215 and the compressor assembly 213, respectively, for controlling the opening and closing of the compressor assembly 213 and the flow rate of the refrigerant of the compressor assembly 213 and the delivery pump 215 according to the temperature sensed by the outdoor temperature sensor.
In the embodiment of the present invention, the outdoor controller adjusts the flow rate of the refrigerant provided by the delivery pump 215 and the compressor assembly 213, so as to adjust the refrigerating capacity.
Further, the air conditioning system further comprises a master controller, wherein the master controller is respectively connected with the indoor controller and the outdoor controller, and is used for receiving data signals sent by the indoor controller, calculating total refrigeration capacity according to the data signals sent by the indoor controller, and adjusting the refrigerant flow of the compressor assembly 213 and/or the delivery pump 215 according to the total refrigeration capacity so as to automatically control the air conditioning system.
Of course, a flowmeter may be disposed at a position of the communication pipeline of the outdoor unit module near the refrigerant outlet, and the flowmeter may be connected to the outdoor controller, where the overall controller may also receive a data signal sent by the outdoor controller (such as a flow signal sent by the flowmeter and received by the outdoor controller), calculate the total cooling capacity according to the data signal sent by the outdoor controller, and adjust the refrigerant flow of the compressor assembly 213 and/or the delivery pump 215 according to the total cooling capacity, so as to automatically control the air conditioning system.
Finally, it should be noted that the above embodiments are intended to illustrate the technical solution of the present invention and not to limit it, and those skilled in the art may modify the embodiments or make equivalent substitutions for some technical features without departing from the spirit of the present invention, and all the embodiments are intended to be covered by the scope of the present invention.
Claims (9)
1. An air conditioning system, comprising:
the indoor unit module, the outdoor unit module, the first loop pipe and the second loop pipe;
the indoor unit module comprises a plurality of refrigerating tail ends, a refrigerant inlet of each refrigerating tail end is communicated with the first annular pipe, and a refrigerant outlet is communicated with the second annular pipe;
the outdoor unit module comprises a plurality of outdoor loop units, a refrigerant inlet of each outdoor loop unit is communicated with the second loop pipe, and a refrigerant outlet is communicated with the first loop pipe;
a first refrigerant cut-off valve is arranged on a first annular pipe between the refrigerant inlets of every two adjacent refrigerating tail ends, a second refrigerant cut-off valve is arranged on a second annular pipe between the refrigerant outlets of every two adjacent refrigerating tail ends, and among the outdoor loop units, the refrigerant inlets of at least two outdoor loop units are respectively communicated with different pipe sections defined by the first adjacent two refrigerant cut-off valves on the first annular pipe, and the refrigerant outlets are respectively communicated with different pipe sections defined by the second adjacent two refrigerant cut-off valves on the second annular pipe;
when a refrigeration tail end is in fault for maintenance or replacement, a first refrigerant cut-off valve at two ends of a refrigerant inlet of the refrigeration tail end is closed, and a second refrigerant cut-off valve at two ends of a refrigerant outlet of the refrigeration tail end is closed;
each refrigerating terminal comprises at least one evaporator assembly, and a first throttling device and a flowmeter are arranged at a refrigerant inlet of each evaporator assembly;
the air conditioning system further comprises an indoor controller which is respectively connected with the first throttling device and the flowmeter and used for adjusting the opening of the first throttling device according to the set indoor temperature and the flow signal detected by the flowmeter;
the air conditioning system further comprises a master controller which is respectively connected with the indoor controller and the outdoor controller and is used for receiving data signals sent by the indoor controller, calculating total refrigerating capacity according to the data signals sent by the indoor controller and adjusting the refrigerant flow of the compressor assembly and/or the delivery pump according to the total refrigerating capacity.
2. An air conditioning system according to claim 1, wherein,
the refrigerating capacity and the mounting mode of the plurality of refrigerating terminals are the same; or,
and the refrigerating capacity and the installation mode of at least two refrigerating tail ends in the plurality of refrigerating tail ends are different.
3. An air conditioning system according to claim 2, wherein,
the plurality of refrigerating terminals are respectively selected from any one or more of an inter-column unit, a back plate unit, a suspended ceiling unit and an embedded unit.
4. An air conditioning system according to claim 1, wherein,
each outdoor loop unit comprises a communicating pipeline with a refrigerant inlet and a refrigerant outlet, a condenser assembly and a compressor assembly;
the condenser assembly at least comprises a liquid-liquid heat exchanger arranged on the communicating pipeline, one passage of the liquid-liquid heat exchanger is communicated with the communicating pipeline, and the other passage is communicated with the compressor assembly in series.
5. The air conditioning system of claim 4, wherein the air conditioning system comprises,
the condenser assembly further comprises an air cooling coil pipe arranged between the refrigerant inlet of the communicating pipeline and the liquid-liquid heat exchanger, and the air cooling coil pipe is communicated with one passage of the liquid-liquid heat exchanger in series through the communicating pipeline.
6. An air conditioning system according to claim 5, wherein,
the compressor assembly comprises a compressor, a condenser and a second throttling device which are sequentially connected in series;
wherein, the forced air cooling coil pipe with the condenser is mutual superpose, and share a fan.
7. An air conditioning system according to any of claims 4-6, characterized in that,
each outdoor loop unit further comprises a delivery pump, wherein the delivery pump is arranged between the condenser assembly and the refrigerant outlet of the communicating pipeline;
the communication pipeline in each outdoor loop unit between the refrigerant inlet and the condenser assembly is communicated with the communication pipeline in at least one other outdoor loop unit between the refrigerant inlet and the condenser assembly, and a refrigerant cut-off valve III is arranged on the communication pipeline;
and a communicating pipeline positioned between the refrigerant outlet and the delivery pump in each outdoor loop unit is mutually communicated with a communicating pipeline positioned between the refrigerant outlet and the delivery pump in at least one other outdoor loop unit, and a refrigerant cut-off valve IV is arranged on the communicated pipeline.
8. An air conditioning system according to claim 7, wherein,
and a plurality of outdoor loop units, wherein a communicating pipe between the condenser assembly and the delivery pump in each of the outdoor loop units is communicated with a communicating pipe between the condenser assembly and the delivery pump in at least one other outdoor loop unit.
9. An air conditioning system according to claim 7, wherein,
the air conditioning system further comprises an outdoor controller and an outdoor temperature detector, wherein the outdoor controller is respectively connected with the outdoor temperature detector, the delivery pump and the compressor assembly and is used for controlling the opening and closing of the compressor assembly and the refrigerant flow of the compressor assembly and the delivery pump according to the temperature detected by the outdoor temperature detector.
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| CN201910016628.3A CN109681973B (en) | 2019-01-08 | 2019-01-08 | Air conditioning system |
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| CN201910016628.3A CN109681973B (en) | 2019-01-08 | 2019-01-08 | Air conditioning system |
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| CN110068048A (en) * | 2019-05-28 | 2019-07-30 | 北京远大天益生态建筑设计院有限公司 | A kind of integrated microporous pipe unit |
| CN111811116A (en) * | 2020-07-07 | 2020-10-23 | 北京丰联奥睿科技有限公司 | Configuration method of multi-connected air conditioning system |
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