CN108397830B - A new full-effect multi-mode energy-saving air conditioning system - Google Patents
A new full-effect multi-mode energy-saving air conditioning system Download PDFInfo
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- CN108397830B CN108397830B CN201810381189.1A CN201810381189A CN108397830B CN 108397830 B CN108397830 B CN 108397830B CN 201810381189 A CN201810381189 A CN 201810381189A CN 108397830 B CN108397830 B CN 108397830B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 26
- 238000005057 refrigeration Methods 0.000 claims abstract description 60
- 238000010521 absorption reaction Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
- 238000009423 ventilation Methods 0.000 claims description 41
- 238000005507 spraying Methods 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 11
- 230000001172 regenerating effect Effects 0.000 claims description 8
- 239000006096 absorbing agent Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 2
- 230000001932 seasonal effect Effects 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 description 12
- 238000005265 energy consumption Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 10
- 239000003507 refrigerant Substances 0.000 description 10
- 238000009434 installation Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000002401 inhibitory effect Effects 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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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
- 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
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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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
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- Combustion & Propulsion (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
本发明公开了一种新型全效多模式节能空调系统，包括室外主机和室内机，室外主机为包含制冷系统和热运输系统放热端换热器；制冷系统的高温侧和热运输系统放热端换热器设置于风通道区；制冷端换热器内设置有能相互交换热量的第一工质通道和第二工质通道，第一工质通道串设于制冷系统，第二工质通道通过热超导工质第一管道与热运输系统吸热端换热器连通；室内机为至少一个室内吸热装置；热运输系统放热端换热器通过热超导工质第二管道与所述热超导工质第一管道连通，在热超导工质第二管道上串设有截断阀。并通过截断阀的开启与关闭来形成使用制冷系统和/或热运输系统放热端换热器作为冷源的热运输系统。本发明的空调系统能够提供适应于各种不同季节环境的多模式运行，更加全效、节能。
The present invention discloses a novel full-effect multi-mode energy-saving air-conditioning system, including an outdoor main unit and an indoor unit, wherein the outdoor main unit is a heat exchanger including a refrigeration system and a heat transport system heat release end; the high temperature side of the refrigeration system and the heat exchanger at the heat transport system heat release end are arranged in the wind channel area; the heat exchanger at the refrigeration end is provided with a first working medium channel and a second working medium channel that can exchange heat with each other, the first working medium channel is arranged in series in the refrigeration system, and the second working medium channel is connected to the heat exchanger at the heat transport system heat absorption end through a first thermal superconducting working medium pipeline; the indoor unit is at least one indoor heat absorption device; the heat exchanger at the heat transport system heat release end is connected to the first thermal superconducting working medium pipeline through a second thermal superconducting working medium pipeline, and a shutoff valve is arranged in series on the second thermal superconducting working medium pipeline. A heat transport system using the heat exchanger at the heat release end of the refrigeration system and/or the heat transport system as a cold source is formed by opening and closing the shutoff valve. The air-conditioning system of the present invention can provide multi-mode operation adapted to various seasonal environments, and is more full-effect and energy-saving.
Description
Technical Field
The present invention relates to an air conditioning system, and more particularly, to an air conditioning system suitable for a machine room environment.
Background
Along with the development of social informatization, the number of informatization facilities such as data centers and base stations with various scales is rapidly increased, and the heating value of various IT equipment is also multiplied, so that the refrigeration energy consumption of the precision air conditioner in the data center is the second most energy consumption project next to the IT equipment at present, and therefore, the energy-saving design significance of the precision air conditioner is great.
Unlike conventional comfortable air conditioner, the IT equipment and the auxiliary equipment of the data center room generate heat all the year round, no matter in winter or summer, the outdoor temperature is lower in winter or spring and autumn, the natural cooling method can be adopted, the outdoor environment can be used as a cold source to directly or indirectly cool the equipment of the room, and the compression refrigeration equipment with high energy consumption is replaced or assisted.
At present, the following natural cooling modes exist:
1. The principle of the air-air direct heat exchange (hereinafter referred to as air-air heat exchange) is shown in figure 1, the high-temperature machine room return air (such as 35 ℃) and the low-temperature fresh air (such as 15 ℃) are subjected to heat exchange in the plate heat exchanger, and the return air is sent into the machine room after being cooled (such as 23 ℃) to bear the indoor heat load.
The air heat exchanger has the advantages that heat source air and cold source air exchange directly, heat exchange efficiency is high, and the air heat exchanger has the defects that the unit and a connecting air duct are huge in volume and can only be installed at a position close to a machine room due to the fact that the specific heat capacity of the air is small (about 1.005kj/kg. ℃), huge air inlets are needed to be prefabricated on a wall surface or a roof, proper installation conditions cannot be provided for a machine room building, and the use situation is severely limited.
2. The method is most direct, but the data center has high requirements on stability and reliability, and the fresh air has a plurality of uncontrollable factors such as dust, acid gas, corrosive gas, humidity and the like, is directly fed into a machine room or is fed into the machine room after common filtering treatment, so that the method has a large risk and is rarely applied to practice.
3. The separated heat pipe is naturally cooled, and the main principle is that two heat exchangers, i.e. an indoor heat exchanger and an outdoor heat exchanger, are respectively used as an evaporation side and a condensation side of the heat pipe and are connected through a pipeline to form a closed space, and a low-boiling-point refrigerant (such as R22, R410a, R134a and the like) is generally filled into the cavity to be used as a heat pipe working medium, so that the heat pipe is widely applied to an outdoor cabinet at present, and the circulating resistance of the working medium is overcome by utilizing gravity. As shown in fig. 2.
The heat exchange device has the advantages of being capable of being installed in a separated mode, free of huge air duct connection, strict installation distance and height difference limit value exist because of no mechanical power circulation, and the heat exchange device is general in heat exchange efficiency and can only be used for auxiliary energy saving application.
In summary, the existing common natural cooling method includes a plurality of problems, and the natural cold source cannot be utilized stably and efficiently.
Disclosure of Invention
The invention aims to solve the technical problem of providing a more full-efficiency energy-saving air conditioning system which operates in a multi-mode and is suitable for various different seasonal environments.
In order to solve the technical problem, the invention adopts the following technical scheme:
A novel full-effect multi-mode energy-saving air conditioning system comprises an outdoor host and an indoor unit, wherein the outdoor host comprises a set of complete refrigerating system and a heat-releasing end heat exchanger of a heat transport system, a space function area of the outdoor host is divided into a host area and a wind channel area, an outer machine air inlet is formed in an outdoor host shell, close to the host area, of the wind channel area, an outer fan is arranged at the tail end, far away from the host area, of the wind channel area, and a cold air channel of the outdoor host is formed from the outer machine air inlet to the outer fan.
The refrigeration system comprises a high-temperature side and a low-temperature side, and the low-temperature side is a refrigeration end heat exchanger.
The high-temperature side of the refrigerating system and the heat release end heat exchanger of the heat transport system are arranged in the air channel area and can exchange heat with cold air in the cold air channel.
The refrigerating end heat exchanger is internally provided with a first working medium channel and a second working medium channel which can exchange heat mutually, the first working medium channel is provided with a first working medium channel inlet and a first working medium channel outlet, the second working medium channel is provided with a second working medium channel connector, the first working medium is circulated in the refrigerating system, and the first working medium channel is connected in series in a pipeline of the refrigerating system and is used as a low-temperature side of the refrigerating system.
The indoor unit is at least one indoor heat absorber, and the indoor heat absorber comprises a heat absorbing end heat exchanger of the heat transport system and an indoor fan.
The working medium connecting port of the heat absorption end heat exchanger of the heat transportation system is communicated with the second working medium channel connecting port of the refrigeration end heat exchanger through a heat superconducting working medium first pipeline, the working medium connecting port of the heat absorption end heat exchanger of the heat transportation system is communicated with the heat superconducting working medium first pipeline through a heat superconducting working medium second pipeline, and a cut-off valve is arranged on the heat superconducting working medium second pipeline in series.
The heat superconducting working medium heat exchanger comprises a heat superconducting working medium first pipeline, a heat superconducting working medium second pipeline, a refrigerating end heat exchanger second working medium channel, a working medium channel of a heat releasing end heat exchanger of a heat transportation system and a working medium channel of a heat absorbing end heat exchanger of the heat transportation system, wherein the second working medium is integrally communicated in the communicated working medium channel, and the second working medium is the heat superconducting working medium.
When the cut-off valve is closed, a heat transport system between the outdoor host and the indoor unit using the refrigeration system is formed by the heat absorption end heat exchanger, the heat superconducting working medium first pipeline and the refrigeration end heat exchanger of the heat transport system;
When the cut-off valve is opened and the refrigerating system is closed, a heat transport system between the outdoor host and the indoor unit using the heat release end heat exchanger of the heat transport system is formed by the heat absorption end heat exchanger of the heat transport system, the heat superconducting working medium first pipeline, the heat superconducting working medium second pipeline and the heat release end heat exchanger of the heat transport system;
When the cut-off valve is opened and the refrigerating system is simultaneously opened, a heat transport system between the outdoor host and the indoor unit, which simultaneously uses the refrigerating system and the heat release end heat exchanger of the heat transport system, is formed by the heat absorption end heat exchanger of the heat transport system, the heat release end heat exchanger of the heat transport system, the heat superconducting working medium first pipeline, the heat superconducting working medium second pipeline and the refrigerating end heat exchanger.
The refrigerating system comprises a compressor, a condenser, an expansion valve and a refrigerating end heat exchanger which are serially arranged in sequence, wherein the condenser is arranged on the high temperature side of the refrigerating system, the compressor is provided with an exhaust port and an air return port, the inlet of the first working medium channel is communicated with the expansion valve, and the outlet of the first working medium channel is communicated with the air return port of the compressor.
More preferably, in the cold air channel, the heat releasing end heat exchanger of the heat transportation system and the condenser are sequentially arranged along the direction from the air inlet of the external machine to the external fan, a first side ventilation valve is arranged at the side of the heat releasing end heat exchanger of the heat transportation system, the heat releasing end heat exchanger of the heat transportation system and the first side ventilation valve can separate two side spaces of the cold air channel, a second side ventilation valve is arranged at the side of the condenser, and the condenser and the second side ventilation valve can separate two side spaces of the cold air channel.
When the cut-off valve is closed, the first side ventilation valve is opened, the second side ventilation valve is closed, and cold air entering from the air inlet of the external machine mainly passes through the first side ventilation valve and then continuously passes through the condenser to complete heat exchange.
When the cut-off valve is opened and the refrigerating system is closed, the second side ventilation valve is opened and the first side ventilation valve is closed, and cold air entering from the air inlet of the external machine is discharged mainly through the second side ventilation valve after heat exchange of the heat-releasing end heat exchanger of the heat transport system.
When the cut-off valve is opened and the refrigerating system is opened, the first side ventilation valve and the second side ventilation valve are closed at the same time, and cold air entering from the air inlet of the external machine firstly exchanges heat through the heat-releasing end heat exchanger of the heat transport system and then exchanges heat through the condenser.
Further, a heat regenerator is further provided, a first heat recovery pipeline and a second heat recovery pipeline which can exchange heat are arranged in the heat regenerator, the first heat recovery pipeline is arranged on a pipeline between an exhaust port of the compressor and the condenser in a series mode, and the second heat recovery pipeline is arranged on a pipeline between a first working medium channel outlet of the refrigeration end heat exchanger and a return air port of the compressor in a series mode.
And a check valve is arranged between the first heat return pipeline and the exhaust port of the compressor in series, so that the reverse flow of the first heat return pipeline to the direction of the compressor is forbidden.
Further, a spraying device is arranged at the initial section of the air passage area of the outdoor host close to the air inlet of the outdoor host, the spraying device is arranged in front of the condenser and the heat release end heat exchanger of the heat transport system along the ventilation direction, the spraying device comprises a water storage box, a booster water pump, an atomizing nozzle and a water tray, the water storage box is connected with a water supply pipeline through a water supplementing valve, the atomizing nozzle is communicated with the water storage box through the booster water pump, and the water tray is arranged below the atomizing nozzle and connected with the water storage box, and is collected with redundant water drops and then is collected into the water storage box again.
The cut-off valve is an electromagnetic valve.
The heat superconducting working medium is a phase change inhibiting working medium or a non-phase change working medium.
The novel full-effect multi-mode air conditioning system has ingenious structure, firstly, the air conditioning system is separated into a refrigerating system of an outdoor host machine and a heat transportation system between the outdoor host machine and an indoor machine, and by the separation, a unique heat superconducting working medium can be used in a long-distance air conditioning system working medium pipeline, so that the adaptability and the environmental friendliness of the novel full-effect multi-mode air conditioning system to various environments are greatly improved. Meanwhile, the invention skillfully sets the heat release part of the heat transportation system to be freely switched between three modes of a refrigeration system mode and/or a natural air cooling mode so as to adapt to environmental changes in different seasons to obtain optimal energy utilization and use efficiency of an air conditioner, and the invention creatively adopts a single-pipeline system filled with a heat superconducting working medium as the heat transportation system between an outdoor host and an indoor unit.
The heat superconducting working medium comprises a phase change inhibiting working medium, a non-phase change working medium and the like, and can realize rapid heat transfer without depending on the circulation or flow of the working medium. The heat pipe working medium is different from the traditional heat pipe working medium, can rapidly transfer heat through unconventional phase change modes such as thermal resonance and the like, has extremely high heat transfer efficiency, greatly simplifies a pipeline structure, greatly improves the convenience of installation and maintenance, prolongs the service life of a heat transport system, greatly reduces the labor intensity and the cost of installation and maintenance, and brings revolutionary innovation to a multi-mode air conditioning system.
The invention arranges a cut-off valve on the second pipeline of the heat superconducting working medium, and skillfully completes the switching of three condensing modes by opening and closing one cut-off valve. The air conditioning system provided by the invention has the normal refrigeration function and the function of fully utilizing the outdoor natural cold source when the air temperature is low, is particularly suitable for application occasions requiring annual refrigeration, such as a data center, a precise machine room and the like, and meets the modern industrial development concept of energy conservation and emission reduction.
In order to improve the working efficiency of the cold air channel matched with three condensing modes, the invention further optimizes the structure of the cold air channel, skillfully sets the first and second side ventilation valves to be respectively matched with the heat release end heat exchanger and the condenser of the heat transport system to form secondary air channel isolation for separating the cold air channel, and matches the switching of the three condensing modes through different opening and closing combination modes of the first and second side ventilation valves so as to ensure that the cold air channel achieves optimal use efficiency.
Furthermore, the air entering the cold air channel of the outdoor host machine can be cooled firstly and then subjected to heat exchange through the heat-releasing end heat exchanger or the condenser of the heat transport system by arranging the spraying device at the initial section of the air channel area of the outdoor host machine, which is close to the air inlet of the outdoor host machine, so that the heat exchange strength and efficiency are higher.
The air conditioning system of the invention has the main advantages that:
1. The outdoor cold source has high utilization rate, no matter whether the refrigerating system is started or not, the heat can be exchanged as long as the outdoor air temperature is lower than the temperature of the working medium at the heat release end of the heat transport system, and the natural cold source can be fully utilized.
2. The indoor and outdoor connection of the heat transport system is simple, and because the heat superconducting working medium is originally adopted, only 1 single pipe is needed to be connected, the system structure is greatly simplified, and the pipeline can be made of various materials, such as copper pipes, steel pipes, PPR pipes, high polymer materials and the like. Without regard to the common oil return problem of refrigeration systems.
3. The heat transport system can also adopt various working media, besides the phase change inhibiting working media, the heat transport system can also select other heat transfer carriers without working media circulation.
4. The pipeline installation of the heat transport system is simpler, and because the system is not provided with high-precision components such as a compressor, an expansion valve and the like and refrigerating oil with strong hygroscopicity, the process is required to be simplified, and additional elbows such as an oil storage elbow and the like are not required to be installed.
5. The convenience of installation makes the applicability better, and compared with air-air heat exchange, huge air duct connection is not needed any more, and a heat exchange unit with a weight of tens of tons does not have high wind resistance of an air-air plate type heat exchanger.
6. The refrigerating system is integrated, and the working procedures of assembling parts, vacuumizing, adding refrigerant and the like are all carried out in a factory, so that the reliability and the stability of the refrigerating system are greatly improved, common engineering installation defects such as oxidation impurities in a pipe, incomplete vacuumizing, inaccurate refrigerant filling amount and the like caused by welding leakage and insufficient oxidation prevention of welding are eliminated, and the efficiency of the refrigerating system is prevented from being reduced and the failure rate is improved.
7. The conventional machine room air conditioner generally places a refrigerating part such as a compressor and the like in an indoor unit, and a condenser in the outdoor. The invention adopts a natural cooling mode, so that the compressor is not required to be started in low-temperature seasons, and refrigerating components such as the compressor are all arranged in the outdoor unit, the problems of low-temperature starting, refrigerant migration and the like are not required to be considered, and the indoor unit only needs a heat exchanger and a fan, so that the unit volume can be reduced, and the precious machine room area is saved.
8. The refrigerating system is integrated and placed in the outdoor unit, so that reliability and efficiency are improved, the number of times of air conditioner maintenance in a machine room is greatly reduced, and the stability of the environment of the machine room is guaranteed.
9. The outdoor host can realize the modularized assembly effect, for example, two or more outdoor hosts are combined and share the same heat transport system, so that the decentralized transportation and installation are realized, and the system can be simplified and the pipelines are reduced.
10. The indoor tail end of the heat transport system is flexible in design, and can adopt various forms such as a cabinet type, a row room, a suspended ceiling, a box type cooling backboard and the like, so that the requirements of different occasions are met.
11. The outdoor main machine has a switching function of the air valve, so that the condenser and the heat-releasing end heat exchanger of the heat transport system can share one set of fan without increasing the resistance energy consumption of the fan.
12. The outdoor host machine can also have a spray humidification function, so that the temperature of the outdoor air inlet dry bulb is reduced, the energy consumption is further saved, and the range of utilizing the natural cold source is expanded.
13. The application of the high-efficiency heat superconducting working medium can also improve the evaporating temperature of the refrigerating system and obtain higher operation efficiency.
Drawings
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, wherein:
fig. 1 is a schematic structural view of an air conditioner for direct air-to-air heat exchange in the prior art.
Fig. 2 is a schematic structural diagram of a split type heat pipe air conditioner in the prior art.
Fig. 3 is a schematic structural diagram of the novel all-effect multi-mode energy-saving air conditioning system of the present invention.
Fig. 4a is a schematic diagram of the second working medium communication when the shut-off valve is closed, wherein the thick line portion is a pipe for the second working medium communication, and the arrow thereof indicates the heat transfer direction.
Fig. 4b is a schematic diagram of the air flow path of the cool air passage when the shut-off valve is closed.
Fig. 5a is a schematic diagram of the second working medium communication when the shut-off valve is opened and the refrigeration system is closed, wherein the thick line portion is a pipe for the second working medium communication, and the arrow indicates the heat transfer direction.
Fig. 5b is a schematic view of the cool air passage air flow path when the shut-off valve is opened and the refrigeration system is closed.
Fig. 6a is a schematic diagram of the second working medium communication when the shut-off valve is opened and the refrigeration system is simultaneously opened, wherein the thick line portion is a pipe for the second working medium communication, and the arrow thereof indicates the heat transfer direction.
Fig. 6b is a schematic diagram of the cold air channel air flow path when the shut-off valve is opened and the refrigeration system is simultaneously opened.
Fig. 7 is a schematic view of an air conditioning system provided with a spraying device.
In the figure:
100. Outdoor host
1. Heat-releasing end heat exchanger 2, external machine air inlet 3 and external fan of heat transport system
4. Compressor 5, condenser 6 and expansion valve
7. Cold-making end heat exchanger
71. First working fluid channel inlet 72 and first working fluid channel outlet
73. Second working medium channel connecting port
200. Indoor heat absorber
8. Heat exchanger 9 at heat absorbing end of heat transport system, indoor fan 10 and first pipeline of heat superconducting working medium
11. Heat superconducting working medium second pipeline 12, electromagnetic valve 13 and heat regenerator
14. First side vent valve 15, second side vent valve 16, one-way valve
17. Spraying device
171. Water storage box 172, booster water pump 173 and atomizing nozzle
174. Water pan 175 and water replenishing valve
Detailed Description
The invention is described in further detail below with reference to the attached drawings and examples:
fig. 3 shows a novel full-effect multi-mode energy-saving air conditioning system, which comprises an outdoor host 100 and an indoor unit, wherein the outdoor host comprises a complete refrigerating system and a heat-releasing end heat exchanger 1 of a heat transport system, a space function area of the outdoor host 100 is divided into a host area and a wind channel area, an outer air inlet 2 is arranged on an outer shell of the outdoor host 100, which is close to the host area, of the wind channel area, an outer fan 3 is arranged at the tail end, which is far away from the host area, of the wind channel area, and a cold air channel of the outdoor host is formed from the outer air inlet 2 to the outer fan 3.
The refrigeration system comprises a compressor 4, a condenser 5, an expansion valve 6 and a refrigeration end heat exchanger 7 which are sequentially connected in series, wherein the refrigeration system adopts a conventional compression refrigeration method, the system is filled with refrigerant, the refrigeration end heat exchanger 7 plays a role of an evaporation heat exchanger in the refrigeration system, various heat exchanger types can be adopted, including but not limited to shell-and-tube type, sleeve type, plate type heat exchangers and the like, and the compressor is provided with an exhaust port and a return port.
The condenser 5 and the heat-releasing end heat exchanger 1 of the heat transportation system are arranged in the air passage area and can exchange heat with cold air in the cold air passage, wherein the cold air is air flow formed by outdoor air in the cold air passage, and the temperature of the cold air is lower than that of the condenser 5 and the heat-releasing end heat exchanger 1 of the heat transportation system, so the cold air is called cold air.
The refrigerating end heat exchanger 7 is internally provided with a first working medium channel and a second working medium channel which can exchange heat mutually, the first working medium channel is provided with a first working medium channel inlet 71 and a first working medium channel outlet 72, the second working medium channel is provided with a second working medium channel connecting port 73, a first working medium circulates in the refrigerating system, and the first working medium channel is connected in series in a pipeline of the refrigerating system to serve as a low-temperature side of the refrigerating system. The first working medium channel inlet 71 is communicated with the expansion valve 6, and the first working medium channel outlet 72 is communicated with the air return port of the compressor 4.
The indoor unit is at least one indoor heat absorber 200, and the indoor heat absorber 200 comprises a heat absorbing end heat exchanger 8 of a heat transport system and an indoor fan 9.
The working medium connection port of the heat absorption end heat exchanger 8 of the heat transport system is communicated with the second working medium channel connection port 73 of the refrigeration end heat exchanger 7 through a heat superconducting working medium first pipeline 10, the working medium connection port of the heat release end heat exchanger 1 of the heat transport system is communicated with the heat superconducting working medium first pipeline 10 through a heat superconducting working medium second pipeline 11, and an electromagnetic valve 12 is arranged on the heat superconducting working medium second pipeline 11 in series.
Of course, the electromagnetic valve 12 may be any other conventional shut-off valve, so long as the state of communication or shut-off of the second working medium in the second pipeline 11 for switching the superconducting working medium can be controlled by opening and closing the shut-off valve, and even the shut-off valve may be manually controlled.
The heat superconducting working medium first pipeline 10, the heat superconducting working medium second pipeline 11, a refrigerating end heat exchanger second working medium channel, a working medium channel of the heat radiation end heat exchanger 1 of the heat transport system and a working medium channel of the heat absorption end heat exchanger 8 of the heat transport system are filled with a second working medium, the second working medium can be communicated into a whole in the communicated working medium channel, and the second working medium is the heat superconducting working medium. The heat superconducting working medium comprises a phase change inhibiting working medium, a non-phase change working medium and the like, and can realize rapid heat transfer without depending on the circulation or flow of the working medium.
The refrigeration principle of the refrigeration system is that the refrigerant in a gas-liquid two-phase state is evaporated, absorbed and refrigerated in the refrigeration end heat exchanger 7, the refrigerant gas with low temperature and low pressure is sucked and boosted by the compressor 4 to become high-temperature and high-pressure refrigerant gas, then enters the condenser 5 to release heat at equal pressure and then become high-pressure liquid, and the refrigerant liquid is throttled and depressurized by the expansion valve 6 and then enters the refrigeration end heat exchanger 7 again to be evaporated and refrigerated, and the circulation is performed.
More preferably, the air conditioning system is further provided with a heat regenerator 13, a first heat regeneration pipeline and a second heat regeneration pipeline which can exchange heat between the two heat regeneration pipelines are arranged in the heat regenerator 13, the first heat regeneration pipeline is connected in series to the pipeline between the air outlet of the compressor 4 and the condenser 5, and the second heat regeneration pipeline is connected in series to the pipeline between the first working medium channel outlet 72 of the refrigeration end heat exchanger 7 and the air return port of the compressor 4.
The heat regenerator is adopted because the heat exchanger at the refrigeration end adopts a high-efficiency heat exchange mode, the heat exchange temperature difference between the refrigerant serving as the first working medium and the second working medium is smaller, the heat exchange temperature is not suitable to be large, the heat regenerator is adopted to ensure that the suction air has a certain degree of superheat for avoiding the liquid impact of the compressor, and the effect of exhausting and precooling is also achieved. In addition, the system has higher evaporation temperature, and the condition that the temperature difference between the air suction temperature and the liquid pipe temperature is not large occurs in transitional seasons is considered, so that the unique exhaust heat recovery is adopted instead of the traditional liquid pipe heat recovery.
In the cold air channel, the heat discharging end heat exchanger 1 of the heat transportation system and the condenser 5 are sequentially arranged along the direction from the air inlet 2 of the external machine to the external fan 3, a first side ventilation valve 14 is arranged at the side of the heat discharging end heat exchanger 1 of the heat transportation system, and the heat discharging end heat exchanger 1 of the heat transportation system and the first side ventilation valve 14 can separate the two side spaces of the cold air channel;
there are three cases of heat dissipation at the outdoor host:
1. When the outdoor temperature is higher (for example, 22 ℃), the system can not directly utilize outdoor air for cooling, the refrigerating system is required to be used as a cold source, the refrigerating system starts refrigerating, and the heat of the heat transport system is transferred into the refrigerating system through the heat absorption end heat exchanger 8 of the heat transport system, so that the cooling effect is realized.
As shown in fig. 4a, the electromagnetic valve 12 is closed at this time, the heat transport system using the refrigeration system is formed by the heat absorption end heat exchanger 8, the heat superconducting working medium first pipe 10 and the refrigeration end heat exchanger 7, the heat flow path is shown by the thick line in the figure, and the arrow indicates the heat transfer direction.
Meanwhile, as shown in fig. 4b, the air flow path of the cold air channel is shown as a first side ventilation valve 14 and a second side ventilation valve 15 are opened, cold air entering from the air inlet 2 of the external machine mainly passes through the first side ventilation valve 14 and then continuously passes through the condenser 5 to complete heat exchange, namely, most of cold air passes through the first side ventilation valve 14 with smaller wind resistance, and a small part of cold air passes through the heat-releasing end heat exchanger 1 of the heat transport system (only passes through but does not exchange heat), so that the total air flow cross section area is increased, the wind resistance is effectively reduced, and the energy consumption of the air blower is saved. The second side vent valve 15 is closed at this point and the entire flow of air is passed through the condenser 5 of the refrigeration system.
The super heat conduction performance of the phase change inhibiting working medium is utilized, and the heat exchange temperature difference between the indoor coil and the refrigerating end heat exchanger 7 is maintained at a lower level, so that the refrigerating system can operate at a higher evaporating temperature with high efficiency, long piping loss and non-standard loss of on-site installation and evacuation filling are avoided due to the integrated design of the refrigerating system, and the problems of oil return, low temperature and the like are not considered, so that the refrigerating system is more efficient and reliable.
2. When the outdoor temperature is lower (for example, below 10 ℃), the system can directly use the outdoor air as a low-temperature cold source, at the moment, the refrigerating system is closed, and the working medium in the heat transport system directly dissipates heat in the heat release end heat exchanger 1 of the heat transport system. Only a small amount of energy consumption of the fan is needed in the mode, and the energy is saved most.
As shown in fig. 5a, the electromagnetic valve 12 is opened and the refrigerating system is closed at the same time, the heat transport system using the heat-releasing end heat exchanger 1 is formed by the heat-absorbing end heat exchanger 8, the heat-superconducting medium first pipe 10, the heat-superconducting medium second pipe 11 and the heat-releasing end heat exchanger 1, the heat flow path is shown by the thick line in the figure, the arrow indicates the heat transfer direction, the heat is released from the heat-releasing end heat exchanger 1 to the outdoor air, the pipe from the medium to the refrigerating end heat exchanger 7 is not cut off, but the refrigerating system is not started, so the heat is not continuously transferred to the refrigerating end heat exchanger 7, which is why the pipe section does not need to be provided with a valve.
Meanwhile, as shown in fig. 5b, the air flow path of the cold air channel is shown as a second side ventilation valve 15, a first side ventilation valve 14 is closed, cold air entering from the air inlet 2 of the external machine exchanges heat through the heat-releasing end heat exchanger 1 of the heat transportation system, heat in the heat transportation system is taken away, and then the cold air is mainly discharged through the second side ventilation valve 15, and because the condenser 5 is not closed, fin gaps can still pass through air flow, a part of air also flows through the condenser 5 (only passes through but does not exchange heat, and because the refrigerating system is closed), so that the total air flow cross section area is increased, and the wind resistance is reduced.
3. When the air temperature is in the transitional season, the outdoor air temperature is just insufficient to discharge all heat, and the refrigeration system is required to assist in heat dissipation.
As shown in fig. 6a, the electromagnetic valve 12 is opened and the refrigeration system is simultaneously opened, the heat transport system is formed by the heat absorption end heat exchanger 8 of the heat transport system, the heat dissipation end heat exchanger 1 of the heat transport system, the first pipeline 10 of the heat superconducting working medium, the second pipeline 11 of the heat superconducting working medium and the refrigeration end heat exchanger 7, the heat transport system between the outdoor host 100 and the indoor unit which simultaneously uses the refrigeration system and the heat dissipation end heat exchanger 1 of the heat transport system is formed, the heat flow channel is shown by thick lines in the figure, the arrow indicates the heat transfer direction, and the heat dissipation end heat exchanger 1 of the heat transport system and the refrigeration end heat exchanger 7 at the moment are both at low temperature ends, so that heat can be released from the heat dissipation end heat exchanger 1 of the heat transport system and the refrigeration end heat exchanger 7 at the same time.
Meanwhile, as shown in fig. 6b, the air flow path of the cold air channel is closed by the first side ventilation valve 14 and the second side ventilation valve 15, and cold air entering from the air inlet 2 of the external machine firstly exchanges heat through the heat-releasing end heat exchanger 1 of the heat transport system, and then exchanges heat through the condenser 5.
In the mode, outdoor air always flows through the heat-releasing end heat exchanger 1 of the heat transportation system, an outdoor cold source can be fully utilized to the greatest extent, the heat-releasing end heat exchanger of the heat transportation system recovers cold in fresh air and can cause air heating, but the temperature is limited due to small temperature difference in transitional seasons, and the original air inlet temperature is much lower than the standard working condition, so that the influence on a refrigerating system is avoided after the temperature is raised. In fact, in order to prevent the condensation pressure from being too low when the conventional machine room air conditioner is operated in the transitional season, the condensation effect must be restrained by adopting a method of reducing the speed of the forced air blower, so that the design of the air flow path of the mode is quite ingenious and effective.
The refrigerating principle of the heat transport system is that the indoor fan 9 enables air in a machine room to be forced to circulate, the air continuously flows through the heat exchanger 8 at the heat absorption end of the heat transport system, and the temperature of the air is reduced after the second working medium in the coil pipe absorbs heat, so that a refrigerating effect is generated. The second working medium heated and warmed up transmits heat to the refrigeration end heat exchanger 7 in the outdoor host 100 or the heat release end heat exchanger 1 of the heat transport system through the communication pipeline, so that the indoor temperature is continuously lowered.
Of course, the air flow path structure management design of the first and second side ventilation valves 14 and 15 in the cold air channel in the outdoor host 100 may be designed in addition or even without a side ventilation valve according to different specific environments and design ideas, so long as the heat exchange of the refrigeration system and/or the heat release end heat exchanger of the heat transport system can be switched to serve as a cold source through the electromagnetic valve 12, and the heat release end heat exchanger 1 and the condenser 5 of the heat transport system can work normally in the cold air channel.
Further, in order to avoid the backflow from the first regenerative pipe to the compressor, a check valve 16 may be further disposed in series between the first regenerative pipe and the exhaust port of the compressor.
In order to further save energy consumption and expand the range of utilizing natural cold sources, a spraying device 17 is arranged at the initial section of the air channel area of the outdoor host 100, which is close to the air inlet 2 of the outdoor host, as shown in fig. 7, the spraying device 17 is arranged in front of the condenser 5 and the heat release end heat exchanger 1 of the heat transport system along the ventilation direction, the spraying device 17 comprises a water storage box 171, a booster pump 172, an atomizing nozzle 173 and a water tray 174, the water storage box 171 is connected with a water supply pipeline through a water supplementing valve 175, the atomizing nozzle 173 is communicated with the water storage box 171 through the booster pump 172, and the water tray 174 is arranged below the atomizing nozzle 173 and is connected with the water storage box 171, and after redundant water drops are collected, the water drops are collected and are collected in the water storage box 171 again.
In the natural cooling or mixing mode, the humidifying function can obviously reduce the air inlet temperature, and in the refrigeration mode, the humidifying function can obviously reduce the high pressure of the refrigeration system, and the compressor energy consumption is saved.
This function expands the temperature range using the outdoor heat sink, and is briefly described as follows:
Spray humidification (or wet film humidification) is known as an isenthalpic humidification cooling process. The available outdoor temperature range of the unit without humidifying function is set to be <22 ℃, the outdoor air relative humidity is set to be 50%, and the air inlet relative humidity can be increased to 90% by spray humidifying.
The air state point after humidification was found to be dry bulb temperature=22℃, and enthalpy value=60.2 kj/kg.
The air inlet state point can be obtained by the enthalpy value and the relative humidity, and the dry bulb temperature is 28.6 ℃.
That is, with an air relative humidity of 50%, its temperature utilization range can be increased to <28.6 ℃. Better utilization results are obtained if the weather is dry.
In the refrigeration mode, the condensing temperature is reduced by 6.6 ℃ approximately, and the energy consumption of the compressor is reduced to 87% of the original energy consumption.
Of course, the use of humidification has its limitations, water resources are consumed and the use of the humidification in dry climates is necessary, and the spraying device 22 may not be provided depending on the use environment and design.
The refrigerating system can also adopt other refrigerating modes such as adsorption type, magnetic refrigerating, absorption type and the like, so long as the refrigerating system has the function of realizing the non-spontaneous transfer of heat from the low temperature side to the high temperature side through the input of energy (electric energy or heat energy and the like). As long as the low temperature side in the refrigeration system is the refrigeration side heat exchanger 7, the high temperature side of the refrigeration system and the heat release side heat exchanger 1 of the heat transport system are arranged in the air passage area and can exchange heat with cold air in the cold air passage, and the first working medium passage of the refrigeration side heat exchanger 7 is connected in series in a pipeline of the refrigeration system to be used as the low temperature side of the refrigeration system.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The novel full-effect multi-mode energy-saving air conditioning system comprises an outdoor host and an indoor unit, and is characterized in that the outdoor host comprises a complete set of refrigerating system and heat-releasing end heat exchangers of a heat transport system, wherein the space function area of the outdoor host is divided into a host area and a wind channel area;
The refrigeration system comprises a high-temperature side and a low-temperature side, and the low-temperature side is a refrigeration end heat exchanger;
the high-temperature side of the refrigerating system and the heat release end heat exchanger of the heat transport system are arranged in the air channel area and can exchange heat with cold air in the cold air channel;
The refrigerating end heat exchanger is internally provided with a first working medium channel and a second working medium channel which can exchange heat mutually, the first working medium channel is provided with a first working medium channel inlet and a first working medium channel outlet, and the second working medium channel is provided with a second working medium channel connector;
the indoor unit is at least one indoor heat absorber, and the indoor heat absorber comprises a heat absorbing end heat exchanger of a heat transport system and an indoor fan;
The working medium connecting port of the heat absorption end heat exchanger of the heat transportation system is communicated with the second working medium channel connecting port of the refrigeration end heat exchanger through a heat superconducting working medium first pipeline, the working medium connecting port of the heat absorption end heat exchanger of the heat transportation system is communicated with the heat superconducting working medium first pipeline through a heat superconducting working medium second pipeline, and a cut-off valve is arranged on the heat superconducting working medium second pipeline in series;
The heat superconducting working medium first pipeline, the heat superconducting working medium second pipeline, the refrigerating end heat exchanger second working medium channel, the working medium channel of the heat releasing end heat exchanger of the heat transportation system and the working medium channel of the heat absorbing end heat exchanger of the heat transportation system are filled with the second working medium which can be communicated integrally in the communicated working medium channel;
when the cut-off valve is closed, a heat transport system between the outdoor host and the indoor unit using the refrigeration system is formed by the heat absorption end heat exchanger, the heat superconducting working medium first pipeline and the refrigeration end heat exchanger of the heat transport system;
When the cut-off valve is opened and the refrigerating system is closed, a heat transport system between the outdoor host and the indoor unit using the heat release end heat exchanger of the heat transport system is formed by the heat absorption end heat exchanger of the heat transport system, the heat superconducting working medium first pipeline, the heat superconducting working medium second pipeline and the heat release end heat exchanger of the heat transport system;
When the cut-off valve is opened and the refrigerating system is simultaneously opened, a heat transport system between an outdoor host and an indoor unit, which simultaneously uses the refrigerating system and the heat release end heat exchanger of the heat transport system, is formed by the heat release end heat exchanger of the heat transport system, the heat superconducting working medium first pipeline, the heat superconducting working medium second pipeline and the refrigerating end heat exchanger;
In the cold air channel, the heat release end heat exchanger of the heat transport system and the condenser are sequentially arranged along the direction from the air inlet of the external machine to the external fan, a first side ventilation valve is arranged beside the heat release end heat exchanger of the heat transport system, and the heat release end heat exchanger of the heat transport system and the first side ventilation valve can separate the two side spaces of the cold air channel;
When the cut-off valve is closed, simultaneously opening a first side ventilation valve and closing a second side ventilation valve, wherein cold air entering from an air inlet of the external machine mainly passes through the first side ventilation valve and then continuously passes through the condenser to complete heat exchange;
When the cut-off valve is opened and the refrigerating system is closed, simultaneously opening a second side ventilation valve and closing a first side ventilation valve, and after cold air entering from an air inlet of the external machine passes through the heat-releasing end heat exchanger of the heat transport system for heat exchange, the cold air is mainly discharged through the second side ventilation valve;
when the cut-off valve is opened and the refrigerating system is opened, the first side ventilation valve and the second side ventilation valve are closed at the same time, and cold air entering from the air inlet of the external machine firstly exchanges heat through the heat-releasing end heat exchanger of the heat transport system and then exchanges heat through the condenser.
2. The air conditioning system according to claim 1, further comprising a regenerator, wherein a first regenerative pipe and a second regenerative pipe capable of exchanging heat with each other are disposed in the regenerator, the first regenerative pipe is connected in series to a pipe between the air outlet of the compressor and the condenser, and the second regenerative pipe is connected in series to a pipe between the air return port of the compressor and the first working medium channel outlet of the refrigeration side heat exchanger.
3. The air conditioning system according to claim 2, wherein a check valve is further provided in series between the first regenerative pipe and the exhaust port of the compressor, and a reverse flow from the first regenerative pipe to the compressor is prohibited.
4. The air conditioning system of claim 1, wherein a spraying device is arranged at an initial section of the air passage area of the outdoor host close to the air inlet of the outdoor host, the spraying device is arranged in front of the condenser and the heat release end heat exchanger of the heat transport system along the ventilation direction, the spraying device comprises a water storage box, a booster water pump, an atomizing nozzle and a water tray, the water storage box is connected with a water supply pipeline through a water supplementing valve, the atomizing nozzle is communicated with the water storage box through the booster water pump, the water tray is arranged below the atomizing nozzle and is connected with the water storage box, and the water tray is collected with redundant water drops and then is collected into the water storage box again.
5. The air conditioning system according to claim 2, wherein a spraying device is arranged at an initial section of the air passage area of the outdoor host close to the air inlet of the outdoor host, the spraying device is arranged in front of the condenser and the heat release end heat exchanger of the heat transport system along the ventilation direction, the spraying device comprises a water storage box, a booster water pump, an atomizing nozzle and a water tray, the water storage box is connected with a water supply pipeline through a water supplementing valve, the atomizing nozzle is communicated with the water storage box through the booster water pump, the water tray is arranged below the atomizing nozzle and is connected with the water storage box, and the water tray is collected with redundant water drops and then is collected into the water storage box again.
6. The air conditioning system of claim 1, wherein the shut-off valve is a solenoid valve.
7. The air conditioning system of claim 1 wherein said thermally superconducting working fluid is a phase change suppressing working fluid or a non-phase change working fluid.
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