CN117553364A

CN117553364A - Aircraft ground air conditioning system based on phase change cold accumulation and control method

Info

Publication number: CN117553364A
Application number: CN202410030851.4A
Authority: CN
Inventors: 罗伟江; 江依咛; 徐高圣; 党秦豪
Original assignee: Shenzhen Zhongji Tianda Jirong Aviation Refrigeration Co ltd; Nanjing University of Science and Technology; Shenzhen CIMC Tianda Airport Support Ltd
Current assignee: Shenzhen Zhongji Tianda Jirong Aviation Refrigeration Co ltd; Nanjing University of Science and Technology; Shenzhen CIMC Tianda Airport Support Ltd
Priority date: 2024-01-09
Filing date: 2024-01-09
Publication date: 2024-02-13
Anticipated expiration: 2044-01-09
Also published as: CN117553364B

Abstract

The present disclosure provides an aircraft ground air conditioning system based on phase change cold accumulation and a control method, and relates to the technical field of aircraft ground air conditioning, the air conditioning system includes: an air conditioner main unit and a control device; the air conditioner main unit includes: the system comprises an expansion tank, a heat exchanger, a plurality of gas-liquid separators and a pressure reducing pipeline; the expansion tank is used for storing the high-pressure gas-phase secondary refrigerant; the heat exchanger is used for converting the high-pressure gas-phase secondary refrigerant into a first low-temperature liquid-phase secondary refrigerant, the plurality of gas-liquid separators are used for storing liquid-phase secondary refrigerants with different evaporation temperatures, step cold accumulation is carried out, the pressure reducing pipeline is arranged between every two gas-liquid separators and used for generating the liquid-phase secondary refrigerants with different evaporation temperatures from the first low-temperature liquid-phase secondary refrigerant stored in the first gas-liquid separators, and the control equipment is used for controlling the step cold accumulation of the plurality of gas-liquid separators. Through the step cold accumulation, different refrigeration demands of users can be met, and liquid-phase secondary refrigerant with different evaporation temperatures can be prepared, so that the liquid-phase secondary refrigerant can be released when the electric power is insufficient, and the electric charge expense is saved.

Description

Aircraft ground air conditioning system based on phase change cold accumulation and control method

Technical Field

The disclosure relates to the technical field of aircraft ground air conditioners, in particular to an aircraft ground air conditioning system based on phase change cold accumulation and a control method.

Background

For an aircraft of an aviation system, when landing and stopping, cold air with lower continuous temperature is required to be introduced to cool airborne equipment and personnel in a cabin so as to maintain the whole environmental control system within a proper temperature range.

When an aircraft stops at an airport corridor bridge, each corridor bridge is required to be independently provided with an aircraft ground air conditioning device for cooling, and a plurality of ground air conditioning devices possibly exist for cooling the aircraft in the same time, so that the electricity consumption is high, and the cost in the aspect of electricity charge is high.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The invention provides an aircraft ground air conditioning system based on phase change cold accumulation and a control method, which at least overcome the problems of high power consumption and high cost in the aspect of electric charge in the related technology to a certain extent through step cold accumulation and step cold release.

Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.

In a first aspect, embodiments in the present disclosure provide an aircraft ground air conditioning system based on phase change cold storage, comprising: an air conditioner main unit and a control device; the air conditioner main unit includes: the system comprises an expansion tank, a heat exchanger, a plurality of gas-liquid separators and a pressure reducing pipeline;

the expansion tank is used for storing high-pressure gas-phase secondary refrigerant;

the heat exchanger is used for converting the high-pressure gas-phase secondary refrigerant into a first low-temperature liquid-phase secondary refrigerant;

the gas-liquid separators are used for storing liquid-phase secondary refrigerants with different evaporation temperatures and carrying out step cold accumulation; the plurality of gas-liquid separators comprise a first gas-liquid separator, and the first gas-liquid separator is used for communicating the expansion tank and the heat exchanger;

the pressure reducing pipeline is arranged between every two gas-liquid separators and is used for generating liquid-phase secondary refrigerant with different evaporation temperatures for cold accumulation from the first low-temperature liquid-phase secondary refrigerant;

the control equipment is used for controlling the cascade cold accumulation of the plurality of gas-liquid separators under the cold accumulation working condition.

In one possible embodiment, a throttle valve is provided on each depressurization line;

The control equipment is used for controlling the opening of the throttle valve, and adjusting each gas-liquid separator to flow out the gas-liquid secondary refrigerant to the next gas-liquid separator of each gas-liquid separator to obtain the liquid secondary refrigerant with different evaporation temperatures.

In one possible embodiment, the air conditioner main unit further includes: a cold accumulation circulation pipeline;

a first cold accumulation circulating pipeline of the cold accumulation circulating pipeline is arranged between the expansion tank and the first gas-liquid separator; the other cold accumulation circulating pipelines except the first cold accumulation circulating pipeline are arranged between every two gas-liquid separators;

the control equipment is used for controlling the plurality of gas-liquid separators to release cold in a stepped way under the cold release working condition, and enabling the gas-phase secondary refrigerant stored in each gas-liquid separator to flow back to the expansion tank through the cold accumulation circulating pipeline, and carrying out stepped cold accumulation again under the cold accumulation working condition.

In one possible embodiment, the air conditioning main unit is disposed in a first space, and the air conditioning system further includes: a plurality of air supply systems located in the second space;

a long-distance cold air supply pipeline is arranged between each gas-liquid separator and the air supply system in the air conditioner main unit;

each air supply system is used for supplying cool air to the interior of one aircraft;

The remote cooling pipeline is used for remotely releasing liquid-phase secondary refrigerant stored in each gas-liquid separator at different evaporation temperatures into each air supply system in steps under a cooling releasing working condition, and each air supply system is used for conveying cooling air into a corresponding aircraft.

In one possible embodiment, the air conditioner main unit further includes: a plurality of coolant recovery lines;

each secondary refrigerant recovery pipeline is arranged between each air supply system and each gas-liquid separator;

and each secondary refrigerant recovery pipeline is used for conveying the gas-liquid two-phase secondary refrigerant generated in the air supply system by the step cooling under the cooling releasing working condition back to each gas-liquid separator.

In one possible embodiment, each remote cold feed line is provided with a coolant shield pump;

the control equipment is used for controlling the power of the secondary refrigerant shielding pump on the long-distance cold conveying pipeline, adjusting the flow of the liquid-phase secondary refrigerant flowing out of each gas-liquid separator and adjusting the amount of the cold air conveyed to the inner steps of the aircraft.

In one possible embodiment, the air conditioner main unit further includes: a cold supply module and a cold carrying liquid storage pipeline;

the cooling module is used for exchanging heat of the high-pressure gas-phase refrigerating medium flowing out of the first gas-liquid separator through the heat exchanger to obtain a second low-temperature liquid-phase refrigerating medium;

The cold-carrying liquid storage pipeline is arranged between the first gas-liquid separator and the heat exchanger and is used for conveying the second low-temperature liquid-phase secondary refrigerant into the first gas-liquid separator so that the second low-temperature liquid-phase secondary refrigerant sequentially passes through the pressure reducing pipeline to generate liquid-phase secondary refrigerant with different evaporation temperatures stored in each gas-liquid separator;

the control equipment is used for controlling the refrigeration module to refrigerate under the cooling working condition, controlling the liquid-phase refrigerating medium of each gas-liquid separator and carrying out gradient cooling to the interior of the aircraft.

wherein, each cold accumulation circulating pipeline of the other cold accumulation circulating pipelines is also provided with a secondary refrigerant booster pump and a check valve;

the control device is used for controlling the gas-phase secondary refrigerant stored in each gas-liquid separator to return to the first gas-liquid separator through the secondary refrigerant booster pump and the check valve;

and controlling the high-pressure gas-phase secondary refrigerant in the first gas-liquid separator to flow into the heat exchanger again for circulating refrigeration and carrying out gradient cold carrying to the interior of the aircraft.

In a second aspect, an embodiment of the present disclosure provides a control method of an aircraft ground air conditioning system based on phase change cold accumulation, which is applied to the aircraft ground air conditioning system based on phase change cold accumulation in the first aspect, and the method includes:

receiving an air conditioning system starting instruction and determining the current working condition state of the air conditioning system;

if the air conditioning system is determined to be in a cold accumulation working condition currently, controlling the high-pressure gas-phase secondary refrigerant in the expansion tank to enter the first heat exchanger for heat exchange and phase change to be a first low-temperature liquid-phase secondary refrigerant, and then flowing back to the first gas-liquid separator;

and controlling the first low-temperature liquid-phase secondary refrigerant to flow out of the first gas-liquid separators, sequentially passing through each pressure reducing pipeline, and storing the liquid-phase secondary refrigerant with different evaporating temperatures in each gas-liquid separator for step cold accumulation.

In one possible embodiment, the method further comprises:

if the air conditioning system is determined to be in the cooling-releasing working condition currently, controlling a plurality of gas-liquid separators to release cooling step by step;

and controlling the gas-phase secondary refrigerant stored in each gas-liquid separator to flow back to the expansion tank through the cold accumulation circulating pipeline, and carrying out stepped cold accumulation again under the cold accumulation working condition.

In one possible embodiment, in the event that a cold release condition of the air conditioning system is determined, the method includes:

Detecting the air pressure value in each air-liquid separator;

judging whether the air pressure value in each air-liquid separator is larger than or equal to a preset air pressure value set for each air-liquid separator;

if so, controlling the gas-phase secondary refrigerant stored in each gas-liquid separator to flow back to the expansion tank so as to carry out stepped cold accumulation again under the cold accumulation working condition.

In one possible embodiment, the method further comprises:

acquiring the cold demand of a user;

if the user cooling demand is greater than or equal to the preset demand, judging the current working condition state of the air conditioning system;

if the liquid phase secondary refrigerant belongs to the cold accumulation working condition, controlling the opening degree of each throttle valve to obtain liquid phase secondary refrigerant with different evaporation temperatures; and

if the cold release working condition exists, the secondary refrigerant shielding pump on each long-distance cold delivery pipeline is controlled to increase the delivery power, the flow rate of liquid-phase secondary refrigerant in each gas-liquid separator is increased, and the amount of cold release is increased.

In a third aspect, an embodiment of the present disclosure provides a control device for an aircraft ground air conditioning system based on phase change cold accumulation, including:

the determining unit is used for receiving the starting instruction of the air conditioning system and determining the current working condition state of the air conditioning system;

the cold accumulation unit is used for controlling the high-pressure gas-phase secondary refrigerant in the expansion tank to enter the first heat exchanger for heat exchange and phase change to be a first low-temperature liquid-phase secondary refrigerant and then flow back to the first gas-liquid separator if the air conditioning system is determined to belong to the cold accumulation working condition currently;

The cold accumulation unit is also used for controlling the first low-temperature liquid-phase secondary refrigerant to flow out from the first gas-liquid separator, sequentially passes through each pressure reducing pipeline, and generates liquid-phase secondary refrigerant with different evaporating temperatures to be stored in each gas-liquid separator for step cold accumulation.

In one possible embodiment, the apparatus further comprises:

and the cold releasing unit is used for controlling the plurality of gas-liquid separators to release cold in a stepped way if the air conditioning system is determined to belong to the cold releasing working condition currently, controlling the gas-phase refrigerating medium stored in each gas-liquid separator to flow back to the expansion tank through the cold storage circulating pipeline, and carrying out stepped cold storage again under the cold storage working condition.

In a fourth aspect, an embodiment of the present disclosure provides an electronic device, including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the method described in the first aspect above via execution of the executable instructions.

In a fifth aspect, embodiments of the present disclosure provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the method described in the first aspect above.

In a sixth aspect, according to another aspect of the present disclosure, there is also provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The computer instructions are read from a computer-readable storage medium by a processor of a computer device, and executed by the processor, cause the computer device to perform the method of any of the above.

The embodiment of the disclosure provides an aircraft ground air conditioning system based on phase change cold accumulation and a control method, which specifically can be as follows: an aircraft ground air conditioning system based on phase change cold accumulation, a control method, a device, equipment and a medium, wherein the air conditioning system comprises: an air conditioner main unit and a control device; the air conditioner main unit includes: the system comprises an expansion tank, a heat exchanger, a plurality of gas-liquid separators and a pressure reducing pipeline; the expansion tank is used for storing the high-pressure gas-phase secondary refrigerant; the heat exchanger is used for converting the high-pressure gas-phase secondary refrigerant into a first low-temperature liquid-phase secondary refrigerant; the gas-liquid separators are used for storing liquid-phase secondary refrigerants with different evaporation temperatures and carrying out step cold accumulation; the pressure reducing pipeline is arranged between every two gas-liquid separators and is used for generating liquid-phase secondary refrigerants with different evaporating temperatures from the first low-temperature liquid-phase secondary refrigerant stored in the first gas-liquid separators, and the control equipment is used for controlling the cascade cold accumulation of the plurality of gas-liquid separators. Through the step cold accumulation, different refrigeration demands of users can be met, and liquid-phase secondary refrigerant with different evaporation temperatures can be prepared, so that the liquid-phase secondary refrigerant can be released when the electric power is insufficient, and the electric charge expense is saved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 illustrates one of structural schematic diagrams of an air conditioning system in an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram illustrating a first-stage cold accumulation process of an air conditioning system according to an embodiment of the present disclosure;

FIG. 3 illustrates a schematic diagram of a cascade cool storage process of an air conditioning system in an embodiment of the disclosure;

FIG. 4 is a second schematic diagram of an air conditioning system according to an embodiment of the disclosure;

FIG. 5 illustrates a third schematic diagram of an air conditioning system in accordance with an embodiment of the present disclosure;

FIG. 6 shows a fourth schematic diagram of an air conditioning system in an embodiment of the present disclosure;

FIG. 7 illustrates a fifth schematic structural diagram of an air conditioning system in accordance with an embodiment of the present disclosure;

FIG. 8 illustrates a sixth schematic structural diagram of an air conditioning system in accordance with an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a step cooling process of an air conditioning system according to an embodiment of the present disclosure;

fig. 10 is a schematic diagram illustrating a structure of a refrigeration module of an air conditioning system according to an embodiment of the present disclosure;

FIG. 11 is a schematic diagram illustrating a configuration of coolant recovery during a cooling process of an air conditioning system in accordance with an embodiment of the present disclosure;

FIG. 12 illustrates a seventh schematic structural diagram of an air conditioning system in accordance with an embodiment of the present disclosure;

FIG. 13 is a flow chart illustrating a method of controlling an aircraft ground air conditioning system based on phase change cold storage in an embodiment of the disclosure;

FIG. 14 is a schematic diagram showing a control device of an aircraft ground air conditioning system based on phase change cold accumulation in an embodiment of the disclosure;

fig. 15 shows a schematic structural diagram of an electronic device in an embodiment of the disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software or in one or more hardware modules or integrated circuits or in different networks and/or processor devices and/or microcontroller devices.

Because each corridor bridge is required to be independently provided with one aircraft ground air conditioning device for cooling when the current aircraft stops at the airport corridor bridge, a plurality of ground air conditioning devices possibly exist for cooling the aircraft in the same time, the power consumption is high, and the expenditure on the electric charge is high.

The inventor considers the high voltage power of use, and the excessive problem of charges of electricity expenditure provides an aircraft ground air conditioning system based on phase transition cold-storage, and this air conditioning system includes: an air conditioner main unit and a control device; the air conditioner main unit includes: the system comprises an expansion tank, a heat exchanger, a plurality of gas-liquid separators and a pressure reducing pipeline; the expansion tank is used for storing the high-pressure gas-phase secondary refrigerant; the heat exchanger is used for converting the high-pressure gas-phase secondary refrigerant into a first low-temperature liquid-phase secondary refrigerant; the gas-liquid separators are used for storing liquid-phase secondary refrigerants with different evaporation temperatures and carrying out step cold accumulation; the pressure reducing pipeline is arranged between every two gas-liquid separators and is used for generating liquid-phase secondary refrigerants with different evaporation temperatures from the first low-temperature liquid-phase secondary refrigerant stored in the first gas-liquid separator; the control device is used for controlling the cascade cold accumulation of the plurality of gas-liquid separators and releasing the cold to the inner cascade of the aircraft. Through the step cold accumulation, different refrigeration demands of users can be met, and liquid-phase secondary refrigerant with different evaporation temperatures can be prepared, so that the liquid-phase secondary refrigerant can be released when the electric power is insufficient, and the electric charge expense is saved.

The aircraft ground air conditioning system based on phase change cold accumulation provided by the disclosure is described in detail below with reference to the accompanying drawings and examples. The following describes an aircraft ground air conditioning system based on phase change cold accumulation in terms of an air conditioning system.

First, fig. 1 shows one of the schematic structural diagrams of an air conditioning system provided in an embodiment of the present disclosure, which can deliver cool air as a ground air conditioner to the inside of a parked aircraft. As shown in fig. 1, the air conditioning system 100 includes an air conditioning main unit 101 and a control device 102; wherein the air conditioning main unit 101 comprises an expansion tank 10, a heat exchanger 11, a plurality of gas-liquid separators 12, 121, 122..12n, wherein the first gas-liquid separator is 12; the pressure reducing lines 200, 201..20 (n-1), n being a positive integer, the arrows in FIG. 1 indicating the flow of coolant.

Wherein an expansion tank 10 is provided for storing a high pressure gas phase coolant. And a heat exchanger 11 for converting the high pressure gas-phase coolant into a first low temperature liquid-phase coolant. The gas-liquid separators are used for storing liquid-phase secondary refrigerant with different evaporating temperatures and carrying out stepped cold accumulation. The pressure reducing line is disposed between every two gas-liquid separators for generating liquid-phase coolant of different evaporating temperatures from the first low-temperature liquid-phase coolant stored in the first gas-liquid separator 12. The steps in the step cold accumulation in the present disclosure are mainly embodied in that liquid phase refrigerants with different evaporation temperatures can be prepared and stored in each gas-liquid separator. The heat exchange temperature difference of the secondary refrigerant in the flow direction can be effectively maintained through the step cold accumulation function in the present disclosure, and the heat exchange efficiency of the phase change of the air conditioning system is improved. Wherein a first gas-liquid separator 12 is used for communicating the expansion tank 10 with the heat exchanger 11.

The pressure in each gas-liquid separator is different, the pressure in the gas-liquid separator with more pressure reducing pipelines is smaller, the evaporation temperature of the stored liquid-phase secondary refrigerant is lower, and the temperature of the stored liquid-phase secondary refrigerant is lower.

The control device 102 is used for controlling the cascade cold accumulation of the plurality of gas-liquid separators.

In one possible embodiment, the step cool storage process is explained with the first gas-liquid separator 12, the second gas-liquid separator 121, and the depressurization line 200.

Under the cold accumulation working condition of sufficient power distribution, the control device 102 controls the heat exchanger 11 to be opened to exchange heat for the high-pressure gas-phase refrigerant stored in the expansion tank 10, the high-pressure gas-phase refrigerant absorbs the cold energy and changes into the first low-temperature liquid-phase refrigerant, the first low-temperature liquid-phase refrigerant is stored in the first gas-liquid separator 12 and flows to the second gas-liquid separator 121 through the pressure reducing pipeline 200, so that the gas-liquid-phase refrigerant with the evaporation temperature lower than that in the first gas-liquid separator 12 is obtained, the liquid-phase refrigerant and the gas-phase refrigerant are both stored in the second gas-liquid separator 121, the liquid-phase refrigerant is used for subsequent cold release, and the gas-phase refrigerant waits for recovery. Wherein the liquid phase coolant stored in each gas-liquid separator is a coolant saturated liquid.

Wherein the heat exchanger in the present disclosure may be a plate and shell heat exchanger.

In this disclosure, through above-mentioned air conditioning system, can realize step cold-storage, not only cold-storage efficiency is high, and the controllability of cold-storage process is strong, utilizes the electric energy under the distribution sufficient condition to carry out the phase transition cold-storage, releases in the period of distribution inadequately, alleviates and uses voltage.

In one possible embodiment, the step cool storage process may include a primary cool storage, a secondary cool storage, etc., and fig. 2 shows a schematic structural diagram of a primary cool storage process of an air conditioning system; the primary cold accumulation process can be understood as: and under the cold storage working condition, after the first low-temperature liquid-phase secondary refrigerant is obtained, the secondary refrigerant is stored in the first gas-liquid separator 12. The air conditioner main unit further includes: a gaseous coolant outflow conduit 210, a heat exchange conduit 220, and a cold storage reservoir conduit 230.

Illustratively, the gaseous coolant outflow conduit 210 includes a check valve 13. The heat exchange line 220 includes: and a shut-off valve 14. The cold accumulation liquid storage line 230 includes: a shut-off valve 15, a coolant shield pump 16, a check valve 17, and a shut-off valve 18.

Wherein the gaseous coolant outflow conduit 210 is for passage of the high pressure gaseous coolant from the expansion tank 10 into the first gas-liquid separator 12. The heat exchange circuit 220 is used as a circuit for the high pressure gas phase coolant from the first gas-liquid separator 12 to the heat exchanger 11. The cold storage reservoir line 230 is used as a line for the first low temperature liquid phase coolant to flow from the heat exchanger 11 back to the first gas-liquid separator 12.

Wherein a first gas-liquid separator 12 in the present disclosure is provided between the heat exchanger 11 and the expansion tank 10. The first gas-liquid separator 12 can serve as an isolation device between the gas in the expansion tank 10 and the heat exchanger 11, and plays a role in transferring the high-pressure gas-phase secondary refrigerant, so that the gas in the expansion tank 10 is prevented from being directly communicated into the heat exchanger 11, and the safety of the air conditioning system 100 is improved.

The first gas-liquid separator 12 also serves as a carrying tank for the first low-temperature liquid-phase refrigerant in the primary cold accumulation process, and serves as a starting tank for the step cold accumulation process to start depressurization through a depressurization pipeline, so as to generate liquid-phase refrigerants with different evaporation temperatures stored in each subsequent gas-liquid separator.

Under the cold accumulation working condition, the control device 102 controls the one-way valve 13, the stop valve 14, the stop valve 15, the secondary refrigerant shielding pump 16, the check valve 17 and the stop valve 18 to be opened, so that the high-pressure gas-phase secondary refrigerant stored in the expansion tank 10 is subjected to cold energy absorption and phase change in the heat exchanger 11 to be a first low-temperature liquid-phase secondary refrigerant, and then is stored in the first gas-liquid separator 12 after being pressurized for cold energy storage.

In one possible embodiment, a throttle valve is provided on each depressurization line.

For convenience of understanding the air conditioning system structure in the present disclosure, an air conditioning main unit including 3 gas-liquid separators is illustrated as an example, and the first gas-liquid separator 12, the second gas-liquid separator 121, and the third gas-liquid separator 122 respectively include two pressure reducing pipelines, namely, a pressure reducing pipeline 200 and a pressure reducing pipeline 201 respectively.

Fig. 3 shows a schematic structural diagram of a cascade cold accumulation process of an air conditioning system, in which a cascade transfer of a first low-temperature liquid-phase coolant is performed through a pressure-reducing line, and the first low-temperature liquid-phase coolant is stored in each gas-liquid separator.

The pressure reducing line 200 is provided with a throttle valve 19 and the pressure reducing line 201 is provided with a throttle valve 20. As shown in fig. 3, the pressure reducing line 200 may be further provided with a shut-off valve 21, a dry filter 22, and the pressure reducing line 201 may be further provided with a shut-off valve 23, a dry filter 24.

The control equipment is used for controlling the opening of the throttle valve, and adjusting each gas-liquid separator to flow the gas-liquid two-phase secondary refrigerant to the next gas-liquid separator of each gas-liquid separator to obtain the liquid-phase secondary refrigerant with different evaporating temperatures. The control device 102 may be configured to control the opening of the throttle valve 19 and the throttle valve 20, and adjust the flow of liquid-phase coolant from the first gas-liquid separator 12 to the second gas-liquid separator 121, and from the second gas-liquid separator 121 to the third gas-liquid separator 122, to meet different user refrigeration capacity load demands.

The saturated liquid of the secondary refrigerant in different states can be generated by utilizing the depressurization function of the throttle valve, different evaporation temperatures are formed by pressure reduction, and the cold energy is stored by the gas-liquid separator. When the refrigeration load demands of each aircraft are different and the required cold air temperature is also different, the liquid-phase secondary refrigerant with different evaporation temperatures is used for meeting the refrigeration capacity required by different refrigeration load demands.

In one possible embodiment, after the cascade cold storage, the control device 102 may further control each gas-liquid separator to perform cascade cold release under the cold release condition, and flow the gas-phase coolant stored in each gas-liquid separator back to the expansion tank through the cold storage circulation pipeline, and perform cascade cold storage again under the cold storage condition.

The step in the step cooling release is mainly characterized in that the evaporating temperatures of liquid-phase refrigerating media in each gas-liquid separator are in a decreasing relation, so that the refrigerating media with different evaporating temperatures are provided during cooling release.

Taking three gas-liquid separators as an example, fig. 4 shows a second schematic structural diagram of an air conditioning system, and as shown in fig. 4, includes a cold storage circulation line. The cold accumulation circulation pipeline comprises a first cold accumulation circulation pipeline 240 which is arranged between the expansion tank and the first gas-liquid separator. The other cold accumulation circulation pipes except the first cold accumulation circulation pipe 240 are disposed between every two gas-liquid separators, and are respectively: a second cold storage circulation pipe 241 and a third cold storage circulation pipe 242.

The first cold accumulation circulation line 240 is provided with a check valve 25, the second cold accumulation circulation line 241 is provided with a stop valve 26, and the third cold accumulation circulation line 242 is provided with a stop valve 27.

Illustratively, the third cold storage circulation line 242 is connected to the second cold storage circulation line 241, the gaseous coolant generated by the third gas-liquid separator 122 is mixed with the gaseous coolant generated by the second gas-liquid separator 121 in the second cold storage circulation line 241, and then connected to the first gas-liquid separator 12 through the second cold storage circulation line 241, and then the gaseous coolant is conveyed back to the expansion tank 10 through the first cold storage circulation line 240.

Each gas-liquid separator is used for storing liquid-phase secondary refrigerant with different evaporation temperatures and gas-phase secondary refrigerant, the stored liquid-phase secondary refrigerant with different evaporation temperatures is used for releasing cold to the interior of an aircraft, the stored gas-phase secondary refrigerant is used for circulating and returning to the expansion tank 10 to perform cascade cold accumulation again, a circulation process of cascade cold accumulation and cascade cold release is performed, the first gas-liquid separator 12 is simultaneously provided with a plurality of functions, and is used for being used as a high-pressure gas secondary refrigerant in the expansion tank 10 to be transferred to the heat exchanger 11 in the cold accumulation process, and is also used for storing the first low-temperature liquid-phase secondary refrigerant, and is also used as a tank body for primary cold accumulation and collecting all the gas-phase secondary refrigerant flowing back to the expansion tank 10.

Through the pipeline and the structure, the gradient cooling is carried out to the inside of the aircraft under the cooling releasing working condition, the gas-phase refrigerating medium in each gas-liquid separator is stored back into the expansion tank 10 through the cold storage circulating pipeline, the gas-phase refrigerating medium can be reused under the cold storage working condition, the cold storage working condition and the cooling releasing working condition in the present disclosure are changed into the circulating process, the high-pressure gas-phase refrigerating medium generated in the cooling releasing circulation is stored through the expansion tank 10, the cyclic utilization in the cold storage process can be realized, the high-pressure gas-phase refrigerating medium is conveyed to the heat exchanger 11, the phase change heat transfer technology is utilized for cold energy storage, the power consumption is very low compared with the normal refrigerating and cooling process in the whole cold storage and cooling releasing process, and the voltage consumption can be lightened.

In one possible embodiment, since the air conditioner for cooling each aircraft is a complete air conditioner for cooling the aircraft ground in the related art, the host component is heavy, especially for the hanging type air conditioner for cooling the aircraft ground, the heavy host component is hung on the corridor bridge, so that the bearing load of the corridor bridge is overlarge, the potential safety hazard is increased, a large number of devices are concentrated and placed in a large volume, the manufacturing cost is high, and the cooling effect is also affected to a certain extent when the weather is hot.

Based on this, the disclosure presents an embodiment of placing an air conditioning system in two spaces, fig. 5 shows a third schematic structural diagram of an air conditioning system, as shown in fig. 5, where the air conditioning main unit 101 is disposed in a first space, and the air conditioning system 100 further includes: and a plurality of air supply systems 103, 104, 10n located in the second space. The first space may be indoor and the second space may be outdoor.

Further, each air supply system is configured to supply cool air to an interior of one aircraft, so that, in particular, a placement position of each air supply system in the second space may be a position having a distance from the corresponding aircraft less than a preset distance.

A corresponding remote cooling duct 250, 251..25n is provided between each gas-liquid separator and the air supply system in the air conditioning main unit 101. The long-distance cold air conveying pipeline is used for conveying the liquid-phase refrigerating medium stored in each gas-liquid separator to each air conveying system in a long distance, and conveying cold air to the interior of the aircraft corresponding to each air conveying system. A long-distance cold air supply pipeline led out by a gas-liquid separator can be communicated with a plurality of air supply systems, so that the cost can be saved.

The second space can be a corridor bridge, no large-sized component is arranged in the air supply system, the air supply system is hung on the corridor bridge, the pressure of the corridor bridge can be reduced, the air supply system is small in size and is only used for supplying air, and therefore the size of the ground air conditioning equipment of an airplane is reduced, the manufacturing cost is reduced, and energy conservation and emission reduction are achieved.

The step cooling-releasing and air supply system is combined to specifically explain the advantage of the step cooling-releasing, and the advantage of the step cooling-releasing is reflected in increasing the heat transfer efficiency of the heat exchanger in the air duct and reducing the power consumption of the compressor. The larger the heat transfer temperature difference between the hot air in the air duct and the heat exchanger is, the worse the heat transfer efficiency is, for example, the hot air at 50 ℃ is processed to 0 ℃, if only the liquid-phase secondary refrigerant stored in one gas-liquid separator is used and only the single-stage heat exchanger is used in the air supply system, the evaporation temperature of the single-stage heat exchanger in the air supply system is required to reach-5 ℃ or lower, and the problem of frosting is easily caused. And the evaporation temperature is too low, so that the power consumption of the compressor can be increased. Therefore, under the cooling releasing working condition, liquid-phase secondary refrigerant with different evaporating temperatures is conveyed into the multistage heat exchangers in the air supply system to absorb heat and release cooling, so that the gradient cooling releasing is realized, the heat transfer efficiency of the heat exchangers in the air duct can be increased, and the power consumption of the compressor can be reduced.

Further, fig. 6 shows a fourth schematic structural diagram of an air conditioning system according to an embodiment of the present disclosure, and as shown in fig. 6, the air supply system 103 may include: the high efficiency filter 28, the first stage heat exchanger 29, the water baffle 30, the blower 31, the first stage deflector 32, the second stage heat exchanger 33, the third stage heat exchanger 34, the second stage deflector 35 and the blower hose 36.

The air supply system 104 may include: the high efficiency filter 37, the first stage heat exchanger 38, the water baffle 39, the blower 40, the first stage baffle 41, the second stage heat exchanger 42, the third stage heat exchanger 43, the second stage baffle 44 and the blower hose 45.

Wherein a remote cold feed line 250 from the first gas-liquid separator 12 can deliver coolant to the first stage heat exchanger 29 of the air moving system 103 and the first stage heat exchanger 38 of the air moving system 104. The remote cold feed line 251, leading from the second gas-liquid separator 121, can deliver the coolant to the second stage heat exchanger 33 in the air moving system 103 and the second stage heat exchanger 42 of the air moving system 104. A remote cold feed line 252 from the third gas-liquid separator 122 can deliver coolant to the third stage heat exchanger 34 in the air moving system 103 and the third stage heat exchanger 43 in the air moving system 104.

A shut-off valve is provided in the remote cooling duct, and if the air supply system 103 is in use and the air supply system 104 is not in use, the shut-off valve can be opened to shut off the coolant. The air supply system delivers cool air to the interior of the aircraft through its air supply hose.

The air conditioning system in the embodiment can perform centralized refrigeration, the air conditioning main unit part of the aircraft ground air conditioning equipment can be placed in the indoor machine room in a way of delivering cold energy through a remote station, the air conditioning main unit is connected to a plurality of air supply systems through remote cold air delivering pipelines, and each air supply system is connected into the interior of an aircraft to deliver cold energy. Therefore, no matter for the airplane parked by the corridor bridge or the airplane parked by the remote apron, huge refrigeration host components are not needed to be arranged nearby each airplane, and only an air supply system consisting of simple components such as an air blower, a guide plate and the like is needed to be arranged, and refrigerating capacity is conveyed into all stages of heat exchangers of the air supply system by utilizing refrigerating medium, so that the ground air conditioning equipment of the airplane can be simplified, the installed power of airport equipment is reduced, the bearing weight of the corridor bridge equipment is reduced, and the manufacturing cost of the ground air conditioning equipment of the airplane in the airport is reduced.

Further, fig. 7 shows a fifth schematic structural diagram of the air conditioning system; the components of the remote cooling line will be described with reference to fig. 6. A stop valve, a secondary refrigerant shielding pump, a check valve and a regulating valve are arranged on each long-distance cold conveying pipeline.

As shown in fig. 7, the remote cooling line 250 is provided with a shutoff valve 46, a coolant shield pump 47, a check valve 48, and a regulator valve 49; a stop valve 50, a secondary refrigerant shielding pump 51, a check valve 52 and a regulating valve 53 are arranged on the long-distance cold feed pipeline 251; the remote cooling line 252 is provided with a shutoff valve 54, a coolant pump 55, a check valve 56, and a regulator valve 57.

The control device 102 can be used to control the power of the coolant shield pumps on the remote coolant delivery lines, regulate the flow of liquid coolant out of each gas-liquid separator, and regulate the amount of cold air delivered to the aircraft interior steps.

Further, in the process of conveying the gas-liquid two-phase refrigerant generated by the cascade refrigeration back to each gas-liquid separator, the refrigerant can be recycled through the refrigerant recycling pipeline.

Fig. 8 shows a sixth schematic structural diagram of an air conditioning system, showing the overall process under a cool-releasing condition. As shown in fig. 8, the air conditioning system further includes a coolant recovery line. The method comprises the following steps of: the coolant recovery line 260, the coolant recovery line 261, and the coolant recovery line 262. The coolant recovery line 260 is provided with a shut-off valve 58, the coolant recovery line 261 is provided with a shut-off valve 59, and the coolant recovery line 262 is provided with a shut-off valve 60.

Each secondary refrigerant recovery pipeline is arranged between the air supply system and each gas-liquid separator and used for enabling the gas-liquid two-phase secondary refrigerant to flow back to each gas-liquid separator from the air supply system, wherein the gas-liquid two-phase secondary refrigerant is obtained after the liquid-phase secondary refrigerant in each gas-liquid separator absorbs heat in the air supply system.

The control device controls the liquid-phase refrigerant stored in each gas-liquid separator to release to each stage heat exchanger of the air supply system to absorb heat, so as to obtain cold air, the cold air is conveyed to the interior of each aircraft, the gas-liquid two-phase refrigerant generated in each stage heat exchanger of the air supply system is conveyed back to each gas-liquid separator through the refrigerant recovery pipeline, and the gas-phase refrigerant is conveyed back to the expansion tank 10 through the cold storage circulation pipeline to perform the cold storage-release circulation process.

In the present disclosure, under the cold accumulation condition, the gas-liquid two-phase refrigerant is obtained by the heat exchanger 11, and the pressure is reduced by the pressure reducing pipeline, and under the cold release condition, the gas-liquid two-phase refrigerant is obtained after the liquid-phase refrigerant releases the cold energy in the step cold release process, and the obtained gas-liquid two-phase refrigerant is stored in each gas-liquid separator for gas-liquid separation. The gaseous coolant waits to be delivered back into the expansion tank 10 after the gas pressure value of each gas-liquid separator reaches the preset gas pressure value for each gas-liquid separator. And the liquid-phase secondary refrigerant is continuously stored in each gas-liquid separator for cold accumulation and is released under the working condition of waiting for cold release.

In one possible embodiment, the air conditioning system in the disclosure includes a cold supply condition in addition to a cold storage condition and a cold release condition, so as to ensure that after the cold release condition releases the cold energy stored under the cold storage condition, the air conditioning system can also deliver cold air to the interior of the aircraft through normal refrigeration and cold carrying processes.

Fig. 9 is a schematic structural diagram illustrating a cascade cooling process of an air conditioning system, and as shown in fig. 9, the air conditioning main unit further includes: a cooling module 1011 and a cold-carrying reservoir line 270. The bypass valve 61 is provided in the cold-carrying liquid storage line 270. In fig. 8, the cold supply condition is illustrated by taking an example including three gas-liquid separators and two air supply systems. The refrigeration process and the cold-carrying process under the cold supply condition are represented by two types of arrows.

Under the cooling condition, the control device 102 controls the cooling module 1011 to start working, and the cooling module 1011 is used for exchanging heat with the high-pressure gas-phase refrigerant flowing out of the heat exchange pipeline 220 in the first gas-liquid separator 12 through the heat exchanger 11, so as to obtain a second low-temperature liquid-phase refrigerant. In order to distinguish between the cold storage condition and the liquid phase coolant generated by the cold supply condition, the description is made by the first and second.

The cooling operation is also illustrated with the air conditioning apparatus 101 including 3 gas-liquid separators.

The cold-carrying liquid storage pipeline 270 is disposed between the first gas-liquid separator 12 and the heat exchanger 11, and is used for conveying the second low-temperature liquid-phase secondary refrigerant into the first gas-liquid separator 12, so that the second low-temperature liquid-phase secondary refrigerant sequentially passes through the pressure reducing pipeline between every two gas-liquid separators to obtain liquid-phase secondary refrigerants with different evaporation temperatures.

Illustratively, the cold-carrying reservoir line 270 may also be connected to the cold-storage reservoir line 230 prior to the shut-off valve 15 and before the shut-off valve 18 on the cold-storage reservoir line 230, with the second low-temperature liquid-phase coolant entering the cold-carrying reservoir line 270 through the cold-storage reservoir line 230, flowing through the bypass valve 61, onto the cold-storage reservoir line 230 and into the first gas-liquid separator 12 through the shut-off valve 18, as is evident from fig. 9.

Illustratively, the cold-carrying liquid storage pipeline 270 is provided with a bypass valve 61, and the cold-carrying liquid storage pipeline 270 may be specifically disposed in a manner of being communicated with the cold-storage liquid storage pipeline 230, before the stop valve 18 led out from the heat exchanger 11 and connected to the cold-storage liquid storage pipeline 230, the second low-temperature liquid-phase secondary refrigerant flows onto the cold-carrying liquid storage pipeline 270, passes through the bypass valve 61, flows onto the cold-storage liquid storage pipeline 230, and flows into the first gas-liquid separator 12 through the stop valve 18.

In the present disclosure, after the second low-temperature liquid-phase secondary refrigerant is obtained by refrigeration under the cooling condition, most of the components and pipelines under the cold accumulation condition and the cold release condition can be reused in the cold carrying process. As shown in fig. 8, the cooling process in the present disclosure may be: the first gas-liquid separator enters each gas-liquid separator through components provided on the pressure reducing line 200 and the pressure reducing line 201, enters the air supply systems 103 and 104 through the remote air supply lines 250, 251 and 252 for stepped cooling, and returns to each gas-liquid separator through the coolant recovery lines 250, 251 and 252. The structure of the air supply systems 103 and 104 is not described herein.

The cascade in cascade cooling mainly realizes cascade cooling of liquid-phase refrigerating media with different evaporating temperatures stored in each gas-liquid separator through cooling working conditions.

The parts under the cold supply working condition, the cold accumulation working condition and the cold release working condition are multiplexed, the functions of the parts are the same in the processes of refrigeration, cold carrying, cold accumulation and cold release, the multiplexing can save the cost, the volume of an air conditioning system is reduced, the energy conservation and the emission reduction are realized, and the national policy is responded.

In one possible embodiment, fig. 10 shows a schematic structural diagram of a refrigeration module of an air conditioning system, and as shown in fig. 10, a refrigeration module 1011 in the present disclosure may include: a compressor 62, a condenser 63, a refrigerant reservoir 64, a throttle valve 65, the heat exchanger 11, and a gas-liquid separator 66.

The control device 102 controls the operation of the above components and starts the refrigeration cycle, the compressor 62 sucks the low-temperature low-pressure refrigerant, the compressed refrigerant gas becomes high-temperature high-pressure refrigerant gas, the high-pressure refrigerant gas flows through the condenser 63 through the pipeline to be condensed, the high-pressure refrigerant liquid becomes high-pressure refrigerant liquid after heat exchange with the external gas, the low-pressure refrigerant liquid becomes low-pressure refrigerant liquid after passing through the refrigerant liquid reservoir 64 and the throttle valve 65, the low-pressure refrigerant liquid then passes through the heat exchanger 11 to absorb heat to the high-pressure gas-phase refrigerant by vaporization under the low-pressure condition, the low-pressure refrigerant liquid is evaporated into the low-pressure low-temperature refrigerant in the heat exchanger 11 to be sucked into the compressor 62 again after passing through the gas-liquid separator 66, and the next refrigeration cycle is performed.

In one possible embodiment, FIG. 11 shows a schematic diagram of an air conditioning system for refrigerant recovery during a cooling process; and each cold accumulation circulating pipeline of other cold accumulation circulating pipelines in the air conditioner main unit is also provided with a secondary refrigerant booster pump and a check valve. The cold accumulation circulating pipeline is a pipeline under a multiplexed cold release working condition. Specifically, as shown in fig. 11, the second cool storage circulation line 241 is provided with a coolant booster pump 67 and a check valve 68, and the third cool storage circulation line 242 is provided with a coolant booster pump 69 and a check valve 70.

The secondary refrigerant booster pump is used for boosting the gas-phase secondary refrigerant in the gas-liquid separator, and the gas pressure of the gas-liquid separator after passing through more pressure reducing pipelines is smaller, wherein the stored gas-phase secondary refrigerant cannot return to the first gas-liquid separator 12 with high pressure.

Because the cold accumulation of the cold accumulation working condition and the cold release of the cold release working condition may not occur simultaneously, it can be understood that the cold accumulation working condition may be used for cold accumulation alone, and the cold release is performed after the cold accumulation reaches a certain degree, and the cold accumulation working condition and the cold release working condition in the present disclosure are for saving electric quantity, so that the use of a secondary refrigerant booster pump is not required, only the gas-liquid separator is closed by the stop valve 26 on the second cold accumulation circulation pipeline 241 and the stop valve 27 on the third cold accumulation circulation pipeline 242, the gas-phase secondary refrigerant is stored, and the stop valve can be opened after the gas pressure value in the gas-liquid separator is greater than or equal to the preset gas pressure value set for each gas-liquid separator, so that the gas-phase secondary refrigerant with relatively high gas pressure flows back into the first gas-liquid separator 12 through the pipeline. Wherein the preset air pressure value may be greater than the air pressure value in the first air-liquid separator 12 at the same time.

In order to ensure the efficiency of refrigerating and delivering cool air to the interior of the aircraft and the workload of the refrigerating module 1011, the high-pressure gas-phase refrigerating medium stored in the first gas-liquid separator can be directly introduced into the heat exchanger 11 of the refrigerating module 1011, so that the refrigerating medium booster pump can be used for boosting.

The control device is used for controlling the gas-phase refrigerant stored in the third gas-liquid separator 122 to be changed into medium-high pressure gas-phase refrigerant through the stop valve 27, the refrigerant booster pump 69 and the check valve 70, mixed with the medium-high pressure gas-phase refrigerant in the second gas-liquid separator 121, returned into the first gas-liquid separator 12 through the stop valve 26, the refrigerant booster pump 67 and the check valve 68, mixed with the high pressure gas-phase refrigerant stored in the first gas-liquid separator 12, and flowed into the heat exchanger 11 again for circulating refrigeration and step-carrying refrigeration to the interior of the aircraft.

In one possible embodiment, fig. 12 shows a seventh schematic structural diagram of an air conditioning system, as shown in fig. 11, and no redundant description is made about the pipelines that appear in the air conditioning system 100, where all the components used in the cold storage, cold release and cold supply conditions are represented in fig. 12, and include three gas-liquid separators, including two air supply systems, for example.

Through above-mentioned air conditioning system's structure, the air conditioning system in this disclosure not only separately places heavy air conditioning main unit and air supply system for really realizing carrying the part of air conditioning weight loss greatly, the optional position that can be convenient is placed, perhaps when using hanging air conditioner to send cold to the aircraft inside, has reduced because the too big potential safety hazard of bearing load, small, reduce cost, realization energy saving and emission reduction. The parts in the air conditioner main unit are also multiplexed, a new set of parts is added on the common cold supply equipment of the related technology to store and release cold, the multiple functions of step cold storage, release cold and cold supply are realized by a simple structure, the cost is reduced, and the operation cost is low.

Further, cold accumulation and cold release can be performed when the electricity load is large, electricity consumption and voltage consumption are reduced, energy is saved, emission is reduced, peak-valley electricity difference can be fully utilized, and operation cost is greatly saved.

The air conditioning system can perform cascade cold accumulation, cold release and cold supply, is wide in application range and high in flexibility, various valves and pumps are arranged on pipelines in the air conditioning main unit, and the control equipment can flexibly adjust the opening degree to adjust the cold accumulation speed, the cold accumulation amount, the cold release speed, the cold release amount and the like. The gas phase secondary refrigerant generated in the cold accumulation and cold release processes is not directly discharged, but is recycled, so that the exhaust emission is reduced.

The gas-liquid separator can be used for storing liquid-phase secondary refrigerants with different evaporation temperatures and storing gas-phase secondary refrigerants, and the liquid-phase secondary refrigerants with different evaporation temperatures are mainly used for cascade cold accumulation, cascade cold release and cascade cold carrying. The stored gaseous coolant is used primarily to recover the gaseous coolant into the expansion tank 10 for use in a cascade cool storage-cascade cool release cycle.

Based on the structure of the air conditioning system, the present disclosure further provides a control method of an aircraft ground air conditioning system based on phase change cold accumulation, which is applied to the air conditioning system, fig. 13 shows a flow schematic diagram of a control method of an aircraft ground air conditioning system based on phase change cold accumulation, as shown in fig. 13, and includes the following steps:

s1302: and receiving an air conditioning system starting instruction and determining the current working condition state of the air conditioning system.

In one possible embodiment, the air conditioning system 100 is powered to send an air conditioning system start indication, and the air conditioning system 100 first determines the current operating condition.

It should be noted that, although the power consumption is different in different working conditions, the power consumption is different in the air conditioning system 100, and the power consumption is generally the largest in the electric quantity refrigerating process of the air conditioning system 100, because the power consumption is different between the direct refrigeration and the cold-carrying and the cold-storage/cold-releasing starting.

The method for judging the working condition state in the disclosure may include:

(1) After receiving the start instruction of the air conditioning system 100, whether an instruction of the working condition state is received is also received, and if an instruction of a specific working condition is received, determining the specific working condition to which the present belongs.

By way of example, the specific modes may include: receiving a second-level working condition indication, wherein the second-level working condition indication at least comprises: the cold accumulation indication, the cold release indication and the cold supply indication are used for determining the current working condition state of the air conditioning system according to the received secondary working condition indication, wherein the working condition state comprises: cold accumulation working condition, cold release working condition and cold supply working condition.

The air conditioning system 100 in the present disclosure includes a plurality of different working conditions, and under different conditions, the working conditions are different, and the air conditioning system 100 can be ensured to work normally by adopting a mode of a secondary start indication.

Illustratively, by indicating different conditions, if two conditions are started at the same time, the operator may press the cold accumulation button and the cold supply button at the same time, and the air conditioning system 100 receives the cold accumulation indication and the cold supply indication, and starts the cold accumulation and the cold supply conditions.

Starting the air conditioning system 100 in this manner, and controlling the operation of the air conditioning system 100, may be performed to start the cold storage operation alone after starting the air conditioning system 100, and it is not necessarily necessary to supply cold to the interior of the aircraft. Therefore, when the system is started in this manner, it is necessary to wait for the second-stage operation instruction, and the air conditioning system 100 is operated again.

(2) After receiving the start instruction of the air conditioning system 100, the control device 102 autonomously detects and automatically determines what working condition belongs to and starts the corresponding working condition.

Based on this, the control device 102 autonomously detects and automatically determines what operating conditions are, together may include: the cold supply working condition, the cold release working condition and the cold supply working condition and the cold accumulation working condition are started simultaneously.

In one possible embodiment, the control device 102 determines the operating condition state based on the received distribution power.

For example, if the received distribution power is greater than the preset electric power, it indicates that the normal cold supply working condition is satisfied, and the cold accumulation working condition can be started to accumulate cold. If the received distribution power is larger than or equal to the refrigeration electric power and smaller than the preset electric power, the distribution power is not particularly sufficient, only the cold supply working condition is started, and the cold storage working condition is not started. If the received distribution power is smaller than the refrigeration electric power, the distribution is insufficient, and the cold release working condition is started.

In one possible embodiment, after receiving the air conditioning system start-up instruction, the working condition state may also be judged according to the detected air pressure value in the expansion tank 10, for example, if the air pressure value in the expansion tank 10 is less than or equal to the first air pressure value, it is determined that the air conditioning system may currently be in the cooling releasing working condition.

S1304: if the air conditioning system is determined to be in a cold accumulation working condition currently, controlling the high-pressure gas-phase secondary refrigerant in the expansion tank to enter the first heat exchanger for heat exchange and phase change to be a first low-temperature liquid-phase secondary refrigerant, and then flowing back to the first gas-liquid separator.

S1306: and controlling the first low-temperature liquid-phase secondary refrigerant to flow out of the first gas-liquid separators, sequentially passing through each pressure reducing pipeline, and storing the liquid-phase secondary refrigerant with different evaporating temperatures in each gas-liquid separator for step cold accumulation.

In one possible embodiment, taking three gas-liquid separators as an example, the evaporating temperature of the liquid-phase coolant stored in the first gas-liquid separator 12 can be 15 degrees Celsius (C.), the evaporating temperature of the liquid-phase coolant stored in the second gas-liquid separator 121 can be 5 degrees Celsius, and the evaporating temperature of the liquid-phase coolant stored in the third gas-liquid separator 122 can be-2 degrees Celsius to-3 degrees Celsius.

In one possible embodiment, if it is determined that the air conditioning system is currently in a cool-releasing condition, controlling the plurality of gas-liquid separators to release cool in steps. And controlling the gas-phase secondary refrigerant stored in each gas-liquid separator to flow back to the expansion tank through the cold accumulation circulating pipeline, and carrying out stepped cold accumulation again under the cold accumulation working condition.

In an exemplary embodiment, during a cool-releasing condition, liquid coolant stored in each gas-liquid separator at a different vaporization temperature is controlled to be released into each air supply system to provide a stepped cool release to the aircraft interior. And controlling each secondary refrigerant to flow back to the expansion tank through the cold accumulation circulating pipeline, and carrying out stepped cold accumulation again under the cold accumulation working condition.

In one possible embodiment, a switch between operating conditions is illustrated.

For example, if the working condition is determined by the two-level working condition indication mode, a start indication of the air conditioning system 100 is received, and if a certain indication is received separately, a certain working condition is started; if the cold accumulation indication and the cold supply indication are received, the cold accumulation working condition and the cold supply working condition are started at the same time, and cold accumulation is performed during cold supply. And if the cold accumulation stopping indication and the cold supply stopping indication are received and the cold release indication is received, stopping the cold accumulation working condition and the cold supply working condition, and starting the cold release working condition to release cold.

For example, the switching of the operating condition state may be determined based on the detected air pressure value in the expansion tank 10.

For example, after receiving an air conditioning system start instruction, detecting that the distribution power is greater than or equal to a preset electric power, determining that the distribution power currently belongs to a cold supply working condition and a cold accumulation working condition, performing cold accumulation and cold supply, and continuing the cold accumulation process for a period of time, if detecting that the air pressure value in the expansion tank is less than or equal to a first air pressure value, indicating that the air-phase refrigerating medium stored in the expansion tank is consumed for cold accumulation, and is consumed within a certain range, determining that the cold accumulation working condition can be ended, the cold supply working condition can be stopped, the cold release working condition can be started, and the voltage is relieved.

The cold releasing condition continues for a period of time, if the detected air pressure value in the expansion tank 10 is greater than the second air pressure value, which may be the maximum safe air pressure value that the tank body can bear, the air cooling is not continued to be released, but the air plane still needs to continue to convey cold air, the cold releasing condition is determined to be stopped, and the cold supplying condition of the air conditioning system 100 is started.

By judging what working condition an air conditioning system belongs to through the mode, starting and switching the working conditions, the air conditioning system can be flexibly used, peak-valley electricity difference is fully utilized, when the step cold accumulation and the power distribution are insufficient in power distribution, the release working condition is firstly utilized for step release, the cold accumulation is released, then the cooling is carried out, and the electric charge and the running charge are saved.

In one possible embodiment, in the case of determining the cold release condition of the air conditioning system, the method for recovering the gaseous coolant stored in each gas-liquid separator may include: detecting the air pressure value in each air-liquid separator, judging whether the air pressure value in each air-liquid separator is larger than or equal to the preset air pressure value set for each air-liquid separator, if yes, opening a stop valve on other cold accumulation circulating pipelines and a one-way valve on the first cold accumulation circulating pipeline, and flowing the gas-phase refrigerating medium stored in each air-liquid separator back to the expansion tank so as to carry out stepped cold accumulation again under the cold accumulation working condition.

Through the mode, cold accumulation and cold release are changed into one cycle, the gas-phase secondary refrigerant in the expansion tank 10 is used in the cold accumulation process, the prepared liquid-phase secondary refrigerant is stored in each gas-liquid separator, the cold in the liquid-phase secondary refrigerant stored in each gas-liquid separator is released in the cold release process, the gas-phase secondary refrigerant is obtained, and the gas-phase secondary refrigerant is sent back to each gas-liquid separator and recycled into the expansion tank 10, so that the energy is saved, the emission is reduced, the voltage consumption is reduced, the carbon emission is reduced, and the environment is protected.

In one possible embodiment, the air conditioning system 100 in the present disclosure may adjust the cold accumulation and the cold release according to the cold demand of the user, and the specific implementation may include: acquiring a user cooling demand, judging the current working condition state of an air conditioning system if the user cooling demand is greater than or equal to a preset demand, and controlling the opening of each throttle valve if the current working condition state belongs to a cold accumulation working condition to acquire liquid-phase secondary refrigerant with different evaporation temperatures; and if the cold release working condition exists, controlling the secondary refrigerant shielding pump on each long-distance cold delivery pipeline to increase the delivery power, increasing the flow of the liquid-phase secondary refrigerant in each gas-liquid separator, and increasing the amount of cold release.

It should be noted that the coolant in the present disclosure may have various choices, and carbon dioxide (CO 2) may be selected, and the reason for selecting CO2 is: the structure in this disclosure is in a lot of to can adjust the valve opening that sets up on the pipeline of difference according to the difference of user's cold demand, because CO2 vaporization latent heat is big, consequently actual pipeline flow is little, holistic pump power greatly reduced, its working costs decline in other secondary refrigerant, effectively reduced the electric load at airport, realize energy saving and emission reduction.

And CO2 belongs to gas-liquid phase conversion heat, most of the existing secondary refrigerant utilizes single-phase heat exchange, such as low-concentration glycol solution, the temperature of the glycol solution is reduced through a water chilling unit, and then the glycol solution is pumped into a heat exchanger of an aircraft ground air conditioner through a circulating pump, so that the glycol solution has the defects of small heat exchange amount, high flow rate, low temperature and easiness in frosting. The CO2 can be recycled in the cold accumulation and cold release processes, and the gas phase CO2 generated under the cold release working condition is recycled to the expansion tank 10 for reuse under the cold accumulation working condition, so that a water chilling unit, a circulating pump and the like are not needed, and the power can be saved. The cascade cold accumulation, the cascade cold release, the refrigeration and the cold carrying are carried out through the carbon dioxide phase change circulation, the cold air is conveyed to the aircraft, the stability of the cold accumulation refrigeration process is high, the pollution is low, and the cold accumulation refrigeration effect is better.

Based on the same inventive concept, the embodiment of the disclosure also provides a control device of an aircraft ground air conditioning system based on phase change cold accumulation, as in the following embodiment. Since the principle of solving the problem of the embodiment of the device is similar to that of the embodiment of the method, the implementation of the embodiment of the device can be referred to the implementation of the embodiment of the method, and the repetition is omitted.

Fig. 14 is a schematic structural diagram of a control device of an aircraft ground air conditioning system based on phase change cold accumulation in an embodiment of the disclosure, which is described in terms of the control device of the air conditioning system for convenience of description. As shown in fig. 14, the apparatus 140 includes: the determining unit 1401 is configured to receive an air conditioning system start instruction, determine a current working condition state of the air conditioning system, and the cold accumulation unit 1402 is configured to control, if it is determined that the air conditioning system currently belongs to a cold accumulation working condition, the high-pressure gas-phase refrigerant in the expansion tank to enter the first heat exchanger to perform heat exchange phase change to be a first low-temperature liquid-phase refrigerant, and then flow back to the first gas-liquid separator; and controlling the first low-temperature liquid-phase secondary refrigerant to flow out of the first gas-liquid separators, sequentially passing through each pressure reducing pipeline, and storing the liquid-phase secondary refrigerant with different evaporating temperatures in each gas-liquid separator for step cold accumulation.

Those skilled in the art will appreciate that the various aspects of the present disclosure may be implemented as a system, method, or program product. Accordingly, various aspects of the disclosure may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.

An electronic device 1500 according to such an embodiment of the present disclosure is described below with reference to fig. 15. The electronic device 1500 shown in fig. 15 is merely an example and should not be construed to limit the functionality and scope of use of embodiments of the present disclosure in any way.

As shown in fig. 15, the electronic device 1500 is embodied in the form of a general purpose computing device. The components of electronic device 1500 may include, but are not limited to: the at least one processing unit 1510, the at least one storage unit 1520, a bus 1530 that connects the different system components (including the storage unit 1520 and the processing unit 1510).

Wherein the storage unit stores program code that is executable by the processing unit 1510 such that the processing unit 1510 performs steps according to various exemplary embodiments of the present disclosure described in the above section of the "exemplary method" of the present specification. For example, the processing unit 1510 may perform the steps of any one of the method embodiments described above.

The storage unit 1520 may include readable media in the form of volatile memory units such as Random Access Memory (RAM) 15201 and/or cache memory 15202, and may further include Read Only Memory (ROM) 15203.

The storage unit 1520 may also include a program/utility 15204 having a set (at least one) of program modules 15205, such program modules 15205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

Bus 1530 may be a bus representing one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 1500 may also communicate with one or more external devices 1540 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 1500, and/or any device (e.g., router, modem, etc.) that enables the electronic device 1500 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 1550. Also, the electronic device 1500 may also communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, for example, the Internet, through a network adapter 1560. As shown, the network adapter 1560 communicates with other modules of the electronic device 1500 over the bus 1530. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 1500, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts may be implemented as a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the method in the above-described embodiment.

In an exemplary embodiment of the present disclosure, a computer-readable storage medium, which may be a readable signal medium or a readable storage medium, is also provided. On which a program product is stored which enables the implementation of the method described above of the present disclosure. In some possible implementations, various aspects of the disclosure may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the disclosure as described in the "exemplary methods" section of this specification, when the program product is run on the terminal device.

More specific examples of the computer readable storage medium in the present disclosure may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

In this disclosure, a computer readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Alternatively, the program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

In particular implementations, the program code for carrying out operations of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).

It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.

Furthermore, although the steps of the methods in the present disclosure are depicted in a particular order in the drawings, this does not require or imply that the steps must be performed in that particular order or that all illustrated steps be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.

From the description of the above embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a mobile terminal, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. An aircraft ground air conditioning system based on phase change cold accumulation, comprising: an air conditioner main unit and a control device; the air conditioner main unit includes: the system comprises an expansion tank, a heat exchanger, a plurality of gas-liquid separators and a pressure reducing pipeline;

The pressure reducing pipeline is arranged between every two gas-liquid separators and is used for generating liquid-phase secondary refrigerants with different evaporation temperatures from the first low-temperature liquid-phase secondary refrigerant stored in the first gas-liquid separator;

2. The phase-change cold accumulation based aircraft ground air conditioning system as claimed in claim 1, wherein a throttle valve is arranged on each depressurization pipeline;

3. The phase change cold storage based aircraft ground air conditioning system of claim 1, wherein the air conditioning host group further comprises: a cold accumulation circulation pipeline;

4. The phase-change cold storage based aircraft ground air conditioning system of claim 3, wherein the air conditioning host unit is disposed in a first space, the air conditioning system further comprising: a plurality of air supply systems located in the second space;

5. The phase-change cold storage based aircraft ground air conditioning system of claim 4, wherein the air conditioning host group further comprises: a plurality of coolant recovery lines;

6. The phase-change cold accumulation based aircraft ground air conditioning system according to claim 4, wherein each remote cold supply pipeline is provided with a secondary refrigerant shielding pump;

7. The phase change cold storage based aircraft ground air conditioning system of claim 1, wherein the air conditioning host group further comprises: a cold supply module and a cold carrying liquid storage pipeline;

8. The phase change cold storage based aircraft ground air conditioning system of claim 7, wherein the air conditioning host unit further comprises: a cold accumulation circulation pipeline;

9. A control method of an aircraft ground air conditioning system based on phase change cold accumulation, characterized in that it is applied to an air conditioning system according to any one of claims 1 to 8, said method comprising:

10. The method according to claim 9, wherein the method further comprises:

11. The method of claim 10, wherein in the event that a cold release condition of the air conditioning system is determined, the method comprises:

detecting the air pressure value in each air-liquid separator;

12. The method according to claim 9, wherein the method further comprises:

Acquiring the cold demand of a user;