CN111578553A - Aircraft ground air conditioning system - Google Patents
Aircraft ground air conditioning system Download PDFInfo
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- CN111578553A CN111578553A CN202010450682.1A CN202010450682A CN111578553A CN 111578553 A CN111578553 A CN 111578553A CN 202010450682 A CN202010450682 A CN 202010450682A CN 111578553 A CN111578553 A CN 111578553A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 41
- 239000003507 refrigerant Substances 0.000 claims abstract description 100
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000004891 communication Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 12
- 238000012546 transfer Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F1/00—Ground or aircraft-carrier-deck installations
- B64F1/36—Other airport installations
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention provides an aircraft ground air conditioning system, comprising: the water of the water circulation system and the air of the first air flow channel exchange heat in a first stage in the first heat exchange body and then are conveyed to the second air flow channel; in the second heat exchange unit, after the heat exchange medium of the heat exchange medium supply system exchanges heat with the refrigerant of the first refrigerant supply system in the second heat exchange body, the refrigerant flows into the second refrigerant supply system; in the third heat exchange unit, the refrigerant of the second refrigerant supply system exchanges heat with air in a second heat exchange body in a second stage; the twice heat exchanged air is delivered to the cabin of the aircraft to regulate the cabin temperature. In order to meet the temperature requirement of secondary air heat exchange in the third heat exchange unit, the temperature of the refrigerant entering the second heat exchange unit is regulated and controlled by the second heat exchange unit, and the second heat exchange unit is matched with the third heat exchange unit for use, so that the refrigeration efficiency is improved.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an aircraft ground air conditioning system.
Background
Most aircraft are self-contained with air conditioning systems, and the aircraft are usually activated to provide comfort temperature and air to the aircraft during flight or during standby when the aircraft is parked on a ground boarding bridge. The aircraft is provided with an air conditioning system which comprises an air conditioning Auxiliary Power Unit (APU for short), the APU is started in the flying state of the aircraft, a large amount of expensive aviation fuel oil is consumed, the service life of the aircraft air conditioning system is shortened, and environmental pollution and the operation cost of the aircraft are also caused.
The APU (Auxiliary Power Unit) is used for providing air-conditioning bleed air and Power for the airplane when a ground main engine is turned off, providing compressed air for starting the engine, and also providing air source and Power for the airplane if the engine is stopped during the flight process, and is generally installed at the tail of the airplane.
For the reasons of energy conservation, protection of the environment of the country and the health of ground personnel, civil aviation management departments in developed countries such as Europe and America set policies that the airplane parked in the airport of the country is required to execute 'the airplane landing, the APU with serious pollution needs to be turned off, and the environment-friendly airport ground support equipment is used'. The policy is widely applied in Europe and America at present.
Based on the above, the aircraft ground air conditioning system is used as an important airport ground guarantee device, when an aircraft waits to fly on the ground (preparation before flight, inspection after flight and the like), the aircraft ground air conditioning system can completely replace an aircraft with aircraft fuel oil as power and is provided with an APU, the cost of the aircraft fuel oil is greatly reduced, and meanwhile, the pollution to the airport environment is reduced.
Aircraft ground air conditioning systems have also begun to be used in several large airports in the country in recent years. The common form is a rectangular box body and a hose which are hung below a boarding bridge, after an airplane stops at the boarding bridge, an APU is closed, and ground facilities are adopted to provide services such as air conditioning, power supply, oil supply, water supply and the like for the airplane.
Currently, aircraft floor air conditioners are divided into three forms of a unit type, a central type and a hybrid type. Wherein: the unit type airplane ground air conditioner is also called a direct expansion type air conditioner, is an air-cooled integrated unit, and is a box body consisting of a light high-efficiency fan, a refrigeration compressor, an air-cooled condenser and a control element, the air outlet temperature can reach 0-2 ℃, the unit type airplane ground air conditioner usually adopts electric refrigeration and electric heating, the air outlet temperature is about 2 ℃, and the unit type airplane ground air conditioner has the characteristics of low investment, high energy consumption and high maintenance cost.
In order to overcome the defect of high energy consumption of the conventional unit type airplane ground air conditioner, an airplane ground air conditioning system with independent temperature and humidity control is urgently needed to be researched.
Disclosure of Invention
The invention provides an airplane ground air conditioning system, wherein the first heat exchange unit bears about 2/3 cold energy, and the third heat exchange unit bears about 1/3 cold energy, so that the refrigeration efficiency is improved, and the energy consumption is reduced.
The technical scheme for realizing the purpose of the invention is as follows:
an aircraft ground air conditioning system comprising: first heat transfer unit, second heat transfer unit and third heat transfer unit, wherein:
the first heat exchange unit comprises: the heat exchanger comprises a first heat exchange body, a water circulation system for circulating water flow and a first air flow channel for flowing air; the water of the water circulation system and the air of the first air flow channel exchange heat in a first stage in the first heat exchange body, and the air subjected to the first stage heat exchange is conveyed to the second air flow channel;
the second heat exchange unit comprises: the heat exchanger comprises a second heat exchange body, a heat exchange medium supply system for flowing of a heat exchange medium, and a first refrigerant supply system for flowing of a refrigerant; after the heat exchange medium of the heat exchange medium supply system exchanges heat with the refrigerant of the first refrigerant supply system in the second heat exchange body, the refrigerant flows into the second refrigerant supply system;
the third heat exchange unit comprises: the third heat exchange body, a second refrigerant supply system for flowing the refrigerant and a second air flowing channel for flowing air; the refrigerant of the second refrigerant supply system exchanges heat with air in a second heat exchange body; conveying the air subjected to the twice heat exchange to a cabin of the airplane to adjust the temperature of the cabin;
the first air flow channel and the second air flow channel jointly form an air flow channel, and air flows through the air flow channel;
the first refrigerant supply system and the second refrigerant supply system are connected end to form a refrigerant circulating system.
As a further improvement of the invention, the heat exchange medium of the heat exchange medium supply system is air;
the heat exchange medium supply system comprises a fan, an air inlet channel and an air outlet channel, and air enters the second heat exchange body from the air inlet channel to exchange heat with the refrigerant under the action of the fan;
in cold season, after the air flow at 35 +/-3 ℃ exchanges heat with water through the first heat exchange unit, the temperature of the air flow is reduced to 10 +/-1 ℃, and after the air flow at 10 +/-1 ℃ exchanges heat with the refrigerant through the third heat exchange unit, the temperature of the air flow is reduced to 1 +/-1 ℃; the first heat exchange unit bears cold more than 2/3, and the third heat exchange unit bears cold less than 1/3;
in the heating season, after the air flow at minus 10 +/-5 ℃ is subjected to heat exchange with water through the first heat exchange unit, the temperature of the air flow is increased to 17 +/-3 ℃, and after the air flow at 17 +/-3 ℃ is subjected to heat exchange with a refrigerant through the third heat exchange unit, the temperature of the air flow is increased to 30 +/-2 ℃; the first heat exchange unit takes up heat above 2/3 and the third heat exchange unit takes up heat below 1/3.
As a further improvement of the present invention, the heat exchange medium of the heat exchange medium supply system is water;
the heat exchange medium supply system comprises a water supply pipe, a water return pipe and a water pump, and under the action of the water pump, water in the water supply pipe enters the second heat exchange body to exchange heat with the refrigerant and then enters the water return pipe;
in cold season, after the airflow at 35 +/-3 ℃ exchanges heat with water through the first heat exchange unit, the temperature of the airflow is reduced to 13 +/-1 ℃, and after the airflow at 13 +/-1 ℃ exchanges heat with the refrigerant through the third heat exchange unit, the temperature of the airflow is reduced to 1 +/-1 ℃; the first heat exchange unit bears cold below 2/3, and the third heat exchange unit bears cold above 1/3;
in the heating season, after the air flow at minus 10 +/-5 ℃ is subjected to heat exchange with water through the first heat exchange unit, the temperature of the air flow is increased to 15 +/-3 ℃, and after the air flow at 15 +/-3 ℃ is subjected to heat exchange with a refrigerant through the third heat exchange unit, the temperature of the air flow is increased to 30 +/-2 ℃; the first heat exchange unit takes up heat below 2/3 and the third heat exchange unit takes up heat above 1/3.
As a further improvement of the invention, the first heat exchange unit corresponds to N second heat exchange units and N third heat exchange units, and N is more than or equal to 2;
and the primary heat exchange air flowing out of the first air flow channel is divided into N air flows, the N air flows are correspondingly conveyed to second air flow channels of the N third heat exchange units, and secondary heat exchange is completed in the second air flow channels.
As a further improvement of the invention, the third heat exchange body is installed in the inner cavity of the second air flow channel; the second heat exchange body is arranged on the outer side of the second air flow channel;
the refrigerant circulation system penetrates through a peripheral wall of the second air flow passage.
As a further improvement of the invention, a compressor is also arranged on the refrigerant circulating system;
in the cooling season, the refrigerant is changed into a low-pressure gaseous state from a liquid state in the third heat exchange unit, the low-pressure gaseous refrigerant is compressed into a high-pressure gaseous state in the compressor, and the high-pressure gaseous refrigerant is changed into a liquid state in the second heat exchange unit;
in the heating season, the refrigerant is changed into a low-pressure gaseous state from a liquid state in the second heat exchange unit, the low-pressure gaseous refrigerant is compressed into a high-pressure gaseous state in the compressor, and the high-pressure gaseous refrigerant is changed into a liquid state in the third heat exchange unit.
As a further improvement of the invention, the refrigerant circulating system is also provided with a reversing valve;
when the airplane ground air conditioning system is switched from the heating mode to the cooling mode, the reversing valve is reversed, so that the refrigerant flows reversely.
As a further improvement of the invention, in the N second air flow channels, a communication channel is arranged between every two adjacent second air flow channels, and the communication channel is provided with an air guide valve;
the air guide valve guides the secondary heat exchange air in one second air flow channel to enter another second air flow channel through the communication channel and supply the secondary heat exchange air to the cabin corresponding to the other second air flow channel.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to an airplane ground air conditioning system, which is a special all-fresh-air conditioner for supplying air into an airplane cabin through an external air conditioning interface at the lower part of an airplane body and a complicated air supply pipeline in the airplane body by utilizing a longer air supply pipeline and a special airplane joint. The airplane ground air conditioning system is used for replacing an APU, great economic benefits are brought to aviation, ground service is provided for an airport, economic benefits are created, and ground workers and residents around the airport get rid of troubles of noise and pollutant discharge. In addition, the invention also utilizes the airplane ground air-conditioning system, thereby greatly improving the efficiency of the airplane air-conditioning, reducing the energy consumption and achieving the design aim of a green airport.
2. The first heat exchange unit of the invention undertakes about 2/3 cold energy, and the third heat exchange unit undertakes about 1/3 cold energy, thereby improving the refrigeration efficiency and reducing the energy consumption.
3. The refrigerant is used as an intermediate medium, heat exchange between air and the refrigerant in the third heat exchange unit is realized, in order to meet the temperature requirement of secondary heat exchange of air in the third heat exchange unit, the temperature of the refrigerant entering the second heat exchange unit is regulated and controlled by the second heat exchange unit, and the second heat exchange unit is matched with the third heat exchange unit for use, so that the refrigeration efficiency is further improved.
Drawings
FIG. 1 is a heat exchange flow diagram of an aircraft ground air conditioning system;
FIG. 2 is a functional block diagram of an aircraft ground air conditioning system;
fig. 3 is a schematic diagram of an aircraft ground air conditioning system.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
The invention provides an aircraft ground air conditioning system, as shown in fig. 1, comprising: first heat transfer unit, second heat transfer unit and third heat transfer unit, wherein:
the first heat exchange unit comprises: the heat exchanger comprises a first heat exchange body, a water circulation system for circulating water flow and a first air flow channel for flowing air; water of the water circulation system and air of the first air flow channel exchange heat in a first stage in the first heat exchange body, and air subjected to the first stage heat exchange is conveyed to the second air flow channel.
The second heat exchange unit comprises: the heat exchanger comprises a second heat exchange body, a heat exchange medium supply system for flowing of a heat exchange medium, and a first refrigerant supply system for flowing of a refrigerant; after the heat exchange medium of the heat exchange medium supply system exchanges heat with the refrigerant of the first refrigerant supply system in the second heat exchange body, the refrigerant flows into the second refrigerant supply system.
The third heat exchange unit comprises: the third heat exchange body, a second refrigerant supply system for flowing the refrigerant and a second air flowing channel for flowing air; the refrigerant of the second refrigerant supply system exchanges heat with air in a second heat exchange body; the twice heat exchanged air is delivered to the cabin of the aircraft to regulate the cabin temperature.
The first air flow channel and the second air flow channel jointly form an air flow channel, and air flows through the air flow channel; the first refrigerant supply system and the second refrigerant supply system are connected end to form a refrigerant circulating system.
As shown in FIG. 2, the first heat exchange unit corresponds to N second heat exchange units and N third heat exchange units, wherein N is more than or equal to 2; and the primary heat exchange air flowing out of the first air flow channel is divided into N air flows, the N air flows are correspondingly conveyed to second air flow channels of the N third heat exchange units, and secondary heat exchange is completed in the second air flow channels.
As shown in fig. 2, in the N second air flow passages, a communication passage is provided between adjacent second air flow passages, and the communication passage is provided with an air guide valve; the air guide valve guides the secondary heat exchange air in one second air flow channel to enter the other second air flow channel through the communication channel, and the secondary heat exchange air is supplied to the cabin after being converged with the secondary heat exchange air in the other second air flow channel.
Preferably, the heat exchange medium of the heat exchange medium supply system is air; the heat exchange medium supply system comprises a fan, an air inlet channel and an air outlet channel, and air enters the second heat exchange body from the air inlet channel to exchange heat with the refrigerant under the action of the fan.
In cold season, after the air flow at 35 +/-3 ℃ exchanges heat with water through the first heat exchange unit, the temperature of the air flow is reduced to 10 +/-1 ℃, and after the air flow at 10 +/-1 ℃ exchanges heat with the refrigerant through the third heat exchange unit, the temperature of the air flow is reduced to 1 +/-1 ℃; the first heat exchange unit bears cold more than 2/3, and the third heat exchange unit bears cold less than 1/3;
in the heating season, after the air flow at minus 10 +/-5 ℃ is subjected to heat exchange with water through the first heat exchange unit, the temperature of the air flow is increased to 17 +/-3 ℃, and after the air flow at 17 +/-3 ℃ is subjected to heat exchange with a refrigerant through the third heat exchange unit, the temperature of the air flow is increased to 30 +/-2 ℃; the first heat exchange unit takes up heat above 2/3 and the third heat exchange unit takes up heat below 1/3.
As a first embodiment, when the heat exchange medium of the heat exchange medium supply system is air, the communication channel between the adjacent second air flow channels, the secondary heat exchange air in one second air flow channel enters the front end of the second heat exchange body of the other second air flow channel through the communication channel, joins with the primary heat exchange air in the other second air flow channel, is subjected to secondary heat exchange by the second heat exchange body therein, and is finally supplied to the cabin, that is: the air inlet end of the communicating channel is connected with the rear end of the second heat exchange body of one second air flow channel, and the air outlet end of the communicating channel is connected with the front end of the second heat exchange body of the other second air flow channel.
It should be noted that, according to practical situations, the following modes can be adopted to realize three-stage heat exchange, four-stage heat exchange and even more-stage heat exchange. It should be noted that the core disclosed by the invention is a multi-stage heat exchange mode, and is not limited to 3 air streams, but may also be 4 air streams, 5 air streams or even more air streams, and the following heat exchange modes may be combined at will.
(1) The first-stage heat exchange air flowing out of the first air flow channel is divided into 3 air flows, the 3 air flows are correspondingly conveyed to the second air flow channels of the 3 third heat exchange units, wherein the 3 air flows are different in flow rate, and the first-stage heat exchange air flow rate in the first second air flow channel is larger than the first-stage heat exchange air flow rate in the second air flow channel is larger than the first-stage heat exchange air flow rate in the third second air flow channel.
The second-stage heat exchange air in the first second air flow channel enters the front end of the second heat exchange body of the second air flow channel through a communicating channel, is converged with the first-stage heat exchange air in the second air flow channel and then is subjected to three-stage heat exchange by the second heat exchange body in the second air flow channel, and at the moment, part of the three-stage heat exchange air is conveyed to the cabin;
the other part of the third-stage heat exchange air of the second air flow channel enters the front end of the second heat exchange body of the third air flow channel through another communication channel, is converged with the first-stage heat exchange air in the third air flow channel and then is subjected to four-stage heat exchange by the second heat exchange body in the third air flow channel, and the four-stage heat exchange air is conveyed to another cabin.
(2) The primary heat exchange air flowing out of the first air flow channel is divided into 1+ X air flows, X is larger than or equal to 0, 1 air flow is conveyed to the second air flow channels of 1 third heat exchange unit, and the rest X air flows are conveyed to the second air flow channels except the first, second and third air flow channels.
The secondary heat exchange air in the first air flow channel enters the front end of the second heat exchange body of the second air flow channel through a communicating channel, and is subjected to three-stage heat exchange by the second heat exchange body in the second air flow channel; the third-stage heat exchange air of the second air flow channel enters the front end of the second heat exchange body of the third air flow channel through the other communication channel, and is subjected to four-stage heat exchange by the second heat exchange body in the third air flow channel, and the four-stage heat exchange air is conveyed to the cabin.
(3) The primary heat exchange air flowing out of the first air flow channel is divided into 1+ X air flows, X is larger than or equal to 0, 1 air flow is conveyed to the second air flow channels of 1 third heat exchange unit, and the rest X air flows are conveyed to the second air flow channels except the first air flow channel and the second air flow channel.
The second-stage heat exchange air in the first air flow channel enters the front end of the second heat exchange body of the second air flow channel through a communicating channel, and is subjected to three-stage heat exchange by the second heat exchange body in the second air flow channel, and the three-stage heat exchange air is conveyed to the cabin.
Of course, the heat exchange medium of the heat exchange medium supply system of the present invention is water; the heat exchange medium supply system comprises a water supply pipe, a water return pipe and a water pump, and under the action of the water pump, water in the water supply pipe enters the second heat exchange body to exchange heat with the refrigerant and then enters the water return pipe;
in cold season, after the airflow at 35 +/-3 ℃ exchanges heat with water through the first heat exchange unit, the temperature of the airflow is reduced to 13 +/-1 ℃, and after the airflow at 13 +/-1 ℃ exchanges heat with the refrigerant through the third heat exchange unit, the temperature of the airflow is reduced to 1 +/-1 ℃; the first heat exchange unit bears cold below 2/3, and the third heat exchange unit bears cold above 1/3;
in the heating season, after the air flow at minus 10 +/-5 ℃ is subjected to heat exchange with water through the first heat exchange unit, the temperature of the air flow is increased to 15 +/-3 ℃, and after the air flow at 15 +/-3 ℃ is subjected to heat exchange with a refrigerant through the third heat exchange unit, the temperature of the air flow is increased to 30 +/-2 ℃; the first heat exchange unit takes up heat below 2/3 and the third heat exchange unit takes up heat above 1/3.
As a second embodiment, when the heat exchange medium of the heat exchange medium supply system is water, the water circulation system includes a first circulation pipeline and a second circulation pipeline, the water in the first circulation pipeline exchanges heat with air in the first heat exchange unit in a first stage, and the water in the second circulation pipeline exchanges heat with the refrigerant in the second heat exchange unit.
When the heat exchange medium of the heat exchange medium supply system is water, the communication channel between the adjacent second air flow channels, the secondary heat exchange air in one second air flow channel enters the other second air flow channel through the communication channel, and is supplied to the cabin together with the secondary heat exchange air in the other second air flow channel after being converged, namely: the air inlet end of the communicating channel is connected with the rear end of the second heat exchange body of one second air flow channel, and the air outlet end of the communicating channel is connected with the rear end of the second heat exchange body of the other second air flow channel. Of course, according to actual conditions, three secondary heat exchange air, four secondary heat exchange air and even more secondary heat exchange construction periods can be gathered. The method comprises the following specific steps:
(1) the primary heat exchange air flowing out of the first air flow channel is divided into 2 air flows, the 2 air flows are correspondingly conveyed to the second air flow channels of the 2 third heat exchange units, and the flow of the 2 air flows is not limited.
The second-stage heat exchange air in the first air flow channel enters the rear end of the second heat exchange body of the second air flow channel through the communication channel, and is converged with the second-stage heat exchange air in the second air flow channel and conveyed to the cabin.
(2) The first-stage heat exchange air flowing out of the first air flow channel is divided into 3 air flows, the 3 air flows are correspondingly conveyed to the second air flow channels of the 3 third heat exchange units, and the flow of the 3 air flows is not limited.
The second-stage heat exchange air in the first air flow channel enters the rear end of the second heat exchange body of the second air flow channel through a communicating channel, is converged with the second-stage heat exchange air in the second air flow channel, enters the rear end of the second heat exchange body of the third air flow channel through another communicating channel, is converged with the second-stage heat exchange air in the third air flow channel, and is conveyed to the cabin together.
As a third embodiment, when the heat exchange medium of the heat exchange medium supply system is water, the water circulation system includes a circulation line, the water supplied by the circulation line and air are subjected to heat exchange once in the first heat exchange unit to become high-temperature water, and the refrigerant and the high-temperature water are subjected to heat exchange in the second heat exchange unit. In other words, the water in one circulation pipeline enters the second heat exchange unit to exchange heat with the refrigerant after exchanging heat with the air in the first heat exchange unit.
It should be noted that, according to practical situations, the following modes can be adopted to realize three-stage heat exchange, four-stage heat exchange and even more-stage heat exchange. It should be noted that the core disclosed by the invention is a multi-stage heat exchange mode, and is not limited to 3 air streams, but may also be 4 air streams, 5 air streams or even more air streams, and the following heat exchange modes may be combined at will.
(1) The first-stage heat exchange air flowing out of the first air flow channel is divided into 3 air flows, the 3 air flows are correspondingly conveyed to the second air flow channels of the 3 third heat exchange units, wherein the 3 air flows are different in flow rate, and the first-stage heat exchange air flow rate in the first second air flow channel is larger than the first-stage heat exchange air flow rate in the second air flow channel is larger than the first-stage heat exchange air flow rate in the third second air flow channel.
The second-stage heat exchange air in the first second air flow channel enters the front end of the second heat exchange body of the second air flow channel through a communicating channel, is converged with the first-stage heat exchange air in the second air flow channel and then is subjected to three-stage heat exchange by the second heat exchange body in the second air flow channel, and at the moment, part of the three-stage heat exchange air is conveyed to the cabin;
the other part of the third-stage heat exchange air of the second air flow channel enters the front end of the second heat exchange body of the third air flow channel through another communication channel, is converged with the first-stage heat exchange air in the third air flow channel and then is subjected to four-stage heat exchange by the second heat exchange body in the third air flow channel, and the four-stage heat exchange air is conveyed to another cabin.
(2) The primary heat exchange air flowing out of the first air flow channel is divided into 1+ X air flows, X is larger than or equal to 0, 1 air flow is conveyed to the second air flow channels of 1 third heat exchange unit, and the rest X air flows are conveyed to the second air flow channels except the first, second and third air flow channels.
The secondary heat exchange air in the first air flow channel enters the front end of the second heat exchange body of the second air flow channel through a communicating channel, and is subjected to three-stage heat exchange by the second heat exchange body in the second air flow channel; the third-stage heat exchange air of the second air flow channel enters the front end of the second heat exchange body of the third air flow channel through the other communication channel, and is subjected to four-stage heat exchange by the second heat exchange body in the third air flow channel, and the four-stage heat exchange air is conveyed to the cabin.
(3) The primary heat exchange air flowing out of the first air flow channel is divided into 1+ X air flows, X is larger than or equal to 0, 1 air flow is conveyed to the second air flow channels of 1 third heat exchange unit, and the rest X air flows are conveyed to the second air flow channels except the first air flow channel and the second air flow channel.
The second-stage heat exchange air in the first air flow channel enters the front end of the second heat exchange body of the second air flow channel through a communicating channel, and is subjected to three-stage heat exchange by the second heat exchange body in the second air flow channel, and the three-stage heat exchange air is conveyed to the cabin.
As shown in fig. 3, the third heat exchange body is installed in the inner cavity of the second air flow channel; the second heat exchange body is arranged on the outer side of the second air flow channel; the refrigerant circulation system penetrates the peripheral wall of the second air flow passage. As shown in fig. 3, a compressor is also installed on the refrigerant cycle system; in the cooling season, the refrigerant is changed into a low-pressure gas state from a liquid state in the third heat exchange unit, the low-pressure gas refrigerant is compressed into a high-pressure gas state in the compressor, and the high-pressure gas refrigerant is changed into a liquid state in the second heat exchange unit; in the heating season, the refrigerant is changed into a low-pressure gaseous state from a liquid state in the second heat exchange unit, the low-pressure gaseous refrigerant is compressed into a high-pressure gaseous state in the compressor, and the high-pressure gaseous refrigerant is changed into a liquid state in the third heat exchange unit. The refrigerant circulating system is also provided with a reversing valve; when the airplane ground air conditioning system is switched from the heating mode to the cooling mode, the reversing valve is reversed, so that the refrigerant flows reversely.
As shown in fig. 3, in the present invention, "intake air → air filter → inverter fan → first heat exchange body 1 (with cold water) → first heat exchange body 2 (with cold water) → water baffle → split flow → fan → third heat exchange body 1 → third heat exchange body 2 → water baffle → blow-in" is used in the cold season; "air intake → air filter → variable frequency fan → first heat exchange body 1 (hot water feed) → first heat exchange body 2 (hot water feed) → air humidifier → water guard → split flow → fan → third heat exchange body 1 → third heat exchange body 2 → air humidifier → water guard → air electric heater → air supply" is used in the heating season.
The invention relates to an airplane ground air conditioning system, which is a special all-fresh-air conditioner for supplying air into an airplane cabin through an external air conditioning interface at the lower part of an airplane body and a complicated air supply pipeline in the airplane body by utilizing a longer air supply pipeline and a special airplane joint. The airplane ground air conditioning system is used for replacing an APU, great economic benefits are brought to aviation, ground service is provided for an airport, economic benefits are created, and ground workers and residents around the airport get rid of troubles of noise and pollutant discharge. In addition, the invention also utilizes the airplane ground air-conditioning system, thereby greatly improving the efficiency of the airplane air-conditioning, reducing the energy consumption and achieving the design aim of a green airport.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. An aircraft ground air conditioning system, comprising: first heat transfer unit, second heat transfer unit and third heat transfer unit, wherein:
the first heat exchange unit comprises: the heat exchanger comprises a first heat exchange body, a water circulation system for circulating water flow and a first air flow channel for flowing air; the water of the water circulation system and the air of the first air flow channel exchange heat in a first stage in the first heat exchange body, and the air subjected to the first stage heat exchange is conveyed to the second air flow channel;
the second heat exchange unit comprises: the heat exchanger comprises a second heat exchange body, a heat exchange medium supply system for flowing of a heat exchange medium, and a first refrigerant supply system for flowing of a refrigerant; after the heat exchange medium of the heat exchange medium supply system exchanges heat with the refrigerant of the first refrigerant supply system in the second heat exchange body, the refrigerant flows into the second refrigerant supply system;
the third heat exchange unit comprises: the third heat exchange body, a second refrigerant supply system for flowing the refrigerant and a second air flowing channel for flowing air; the refrigerant of the second refrigerant supply system exchanges heat with air in a second heat exchange body; conveying the air subjected to the twice heat exchange to a cabin of the airplane to adjust the temperature of the cabin;
the first air flow channel and the second air flow channel jointly form an air flow channel, and air flows through the air flow channel;
the first refrigerant supply system and the second refrigerant supply system are connected end to form a refrigerant circulating system.
2. An aircraft ground air conditioning system according to claim 1, wherein the heat exchange medium of the heat exchange medium supply system is air;
the heat exchange medium supply system comprises a fan, an air inlet channel and an air outlet channel, and air enters the second heat exchange body from the air inlet channel to exchange heat with the refrigerant under the action of the fan;
in cold season, after the air flow at 35 +/-3 ℃ exchanges heat with water through the first heat exchange unit, the temperature of the air flow is reduced to 10 +/-1 ℃, and after the air flow at 10 +/-1 ℃ exchanges heat with the refrigerant through the third heat exchange unit, the temperature of the air flow is reduced to 1 +/-1 ℃; the first heat exchange unit bears cold more than 2/3, and the third heat exchange unit bears cold less than 1/3;
in the heating season, after the air flow at minus 10 +/-5 ℃ is subjected to heat exchange with water through the first heat exchange unit, the temperature of the air flow is increased to 17 +/-3 ℃, and after the air flow at 17 +/-3 ℃ is subjected to heat exchange with a refrigerant through the third heat exchange unit, the temperature of the air flow is increased to 30 +/-2 ℃; the first heat exchange unit takes up heat above 2/3 and the third heat exchange unit takes up heat below 1/3.
3. An aircraft ground air conditioning system according to claim 1, wherein the heat exchange medium of the heat exchange medium supply system is water;
the heat exchange medium supply system comprises a water supply pipe, a water return pipe and a water pump, and under the action of the water pump, water in the water supply pipe enters the second heat exchange body to exchange heat with the refrigerant and then enters the water return pipe;
in cold season, after the airflow at 35 +/-3 ℃ exchanges heat with water through the first heat exchange unit, the temperature of the airflow is reduced to 13 +/-1 ℃, and after the airflow at 13 +/-1 ℃ exchanges heat with the refrigerant through the third heat exchange unit, the temperature of the airflow is reduced to 1 +/-1 ℃; the first heat exchange unit bears cold below 2/3, and the third heat exchange unit bears cold above 1/3;
in the heating season, after the air flow at minus 10 +/-5 ℃ is subjected to heat exchange with water through the first heat exchange unit, the temperature of the air flow is increased to 15 +/-3 ℃, and after the air flow at 15 +/-3 ℃ is subjected to heat exchange with a refrigerant through the third heat exchange unit, the temperature of the air flow is increased to 30 +/-2 ℃; the first heat exchange unit takes up heat below 2/3 and the third heat exchange unit takes up heat above 1/3.
4. An aircraft ground air conditioning system according to claim 2 or 3, wherein the first heat exchange unit corresponds to N second heat exchange units and N third heat exchange units, N is greater than or equal to 2;
and the primary heat exchange air flowing out of the first air flow channel is divided into N air flows, the N air flows are correspondingly conveyed to second air flow channels of the N third heat exchange units, and secondary heat exchange is completed in the second air flow channels.
5. An aircraft ground air conditioning system according to claim 4, wherein the third heat exchange body is mounted in the interior cavity of the second air flow passage; the second heat exchange body is arranged on the outer side of the second air flow channel;
the refrigerant circulation system penetrates through a peripheral wall of the second air flow passage.
6. An aircraft floor air conditioning system according to claim 1, wherein a compressor is also mounted on the refrigerant circulation system;
in the cooling season, the refrigerant is changed into a low-pressure gaseous state from a liquid state in the third heat exchange unit, the low-pressure gaseous refrigerant is compressed into a high-pressure gaseous state in the compressor, and the high-pressure gaseous refrigerant is changed into a liquid state in the second heat exchange unit;
in the heating season, the refrigerant is changed into a low-pressure gaseous state from a liquid state in the second heat exchange unit, the low-pressure gaseous refrigerant is compressed into a high-pressure gaseous state in the compressor, and the high-pressure gaseous refrigerant is changed into a liquid state in the third heat exchange unit.
7. An aircraft floor air conditioning system according to claim 6, wherein a reversing valve is provided on the refrigerant circulation system;
when the airplane ground air conditioning system is switched from the heating mode to the cooling mode, the reversing valve is reversed, so that the refrigerant flows reversely.
8. An aircraft floor air conditioning system according to claim 4 wherein, of the N second air flow channels, a communication channel is provided between adjacent second air flow channels, the communication channel being fitted with a pilot valve;
the air guide valve guides the secondary heat exchange air in one second air flow channel to enter another second air flow channel through the communication channel and supply the secondary heat exchange air to the cabin corresponding to the other second air flow channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010450682.1A CN111578553A (en) | 2020-05-25 | 2020-05-25 | Aircraft ground air conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010450682.1A CN111578553A (en) | 2020-05-25 | 2020-05-25 | Aircraft ground air conditioning system |
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| CN111578553A true CN111578553A (en) | 2020-08-25 |
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