System for increasing indoor pressure of an aerial vehicle

Abstract

This invention provides a system for increasing the interior pressure of an air vehicle. The system uses an air conditioning unit installed within the air vehicle to maintain the interior pressure without requiring additional equipment or increasing the vehicle's weight, thereby preventing the introduction of harmful external gases into the interior space and thus ensuring passenger safety.

Description

Technical Field

[0001] The present invention relates to a system for increasing the interior pressure of an air vehicle, and more particularly to a system for increasing the interior pressure of an air vehicle configured to maintain the interior pressure of the air vehicle using an air conditioning unit provided in the air vehicle without additional equipment and without increasing the weight of the fuselage, thereby preventing the introduction of harmful external gases into the interior space and thus ensuring passenger safety. Background Technology

[0002] Recently, air vehicles capable of being used in various fields (such as cargo containers and medical transport) are being developed, and energy-efficient air vehicles have become reliable enough for practical use. When flying at high speeds at high altitudes, conventional aircraft, such as air vehicles, use outside air drawn in from their jet engines to maintain their internal pressure. This is necessary for the aircraft to prevent harmful gases from being introduced into the interior space in the event of an external fire during flight.

[0003] However, under normal circumstances, the need for various devices to maintain the operational status of the flight-related power source and the requirement for an additional pressurization system to maintain the aircraft's internal pressure results in an increase in aircraft weight. Furthermore, the system for increasing internal pressure becomes inoperable in the event of a fire at the power source, leading to a problem in maintaining internal pressure.

[0004] The details described in the background section are intended only to help understand the background of the invention and should not be construed as an admission that they constitute prior art known to those skilled in the art. Summary of the Invention

[0005] Therefore, the present invention provides a system for increasing the indoor pressure of an air vehicle, the system being configured to maintain the indoor pressure of the air vehicle using an air conditioning unit located in the air vehicle without requiring additional equipment and without increasing the weight of the fuselage, thereby preventing the introduction of harmful external gases into the indoor space and thus ensuring passenger safety.

[0006] According to the present invention, the above and other objectives can be achieved by providing a system for increasing the indoor pressure of an air vehicle, the system comprising: a refrigerant line through which refrigerant circulates, and the line including a compressor, a condenser, an expander, and an evaporator; a first air line connected to and branching from the refrigerant line upstream of the compressor via a first valve, and connected to the outside; a second air line connected to and branching from the refrigerant line downstream of the compressor via a second valve, and connected to the indoor space; a third valve disposed in the second air line to allow refrigerant or air flowing in the second air line to selectively flow to the outside or the indoor space; and a controller that, when the air vehicle is in an abnormal condition, operates the first and second valves to allow outdoor air to flow into the first air line, the refrigerant line, and the second air line by starting the compressor, and operates the third valve to allow refrigerant to be discharged to the outside, and then allows air to flow into the indoor space after the refrigerant discharge is completed.

[0007] The first air line can be connected to the refrigerant line at its first end via a first valve, and to an air inlet at its second end. Air is selectively introduced through this air inlet under the control of the controller. The air inlet can normally remain closed, but can be opened when the controller receives information indicating an abnormal condition of the airborne vehicle.

[0008] The second air line can be connected at its first end to the refrigerant line downstream of the condenser via a second valve, and at its second end to the indoor space. The second air line can be equipped with a gas-liquid separator configured to separate the refrigerant from the air.

[0009] The first air line may be equipped with a first oxygen sensor, and the second air line may be equipped with a second oxygen sensor located upstream of the third valve. The controller may be configured to compare the oxygen concentrations input from the first and second oxygen sensors to control the opening and closing of the third valve. When the oxygen concentration input from the second oxygen sensor is lower than or equal to the oxygen concentration input from the first oxygen sensor by a predetermined value, the controller may be configured to operate the third valve, allowing the refrigerant and air flowing in the second air line to be discharged to the outside. When the air vehicle is in normal operating condition and requires cooling of the interior space, the controller may be configured to operate the first and second valves to generate cooling air through the evaporator.

[0010] The system may further include: a heat pump line connected to a refrigerant line downstream of the compressor via a fourth valve, and may include an internal heat exchanger; and a heat pump expander disposed between the internal heat exchanger and the condenser in the refrigerant line. When the air vehicle is in normal condition and heating of the interior space is required, the controller may be configured to operate the first, second, and fourth valves to circulate refrigerant through the refrigerant line and the heat pump line, thereby generating heated air through the internal heat exchanger.

[0011] When the airborne vehicle experiences an malfunction, the controller can be configured to operate the first, second, and fourth valves to allow outdoor air to flow into the first air line, refrigerant line, and second air line, and to operate the third valve to discharge refrigerant to the outside. After the refrigerant discharge is complete, air can then flow into the indoor space. When the controller receives information indicating a decrease in indoor pressure, it can be configured to increase the compressor's drive. Attached Figure Description

[0012] The above and other objects, features and advantages of the present invention will become more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, wherein:

[0013] Figure 1 This is a view illustrating a system for increasing the indoor pressure of an air vehicle according to an embodiment of the present invention;

[0014] Figure 2 It is shown Figure 1 A view showing the construction of a system for increasing the indoor pressure of an air vehicle;

[0015] Figure 3 It is shown Figure 1 A view showing the operation of increasing the indoor pressure of an air vehicle;

[0016] Figure 4 It is shown Figure 1 A view showing the cooling operation of the interior space of an airborne vehicle;

[0017] Figure 5 This is a view illustrating a system for increasing the indoor pressure of an air vehicle according to another embodiment of the present invention;

[0018] Figure 6 It is shown Figure 5 A view showing the heating operation of the interior space of an airborne vehicle;

[0019] Figure 7 It is shown Figure 5 A view showing the cooling operation of the interior space of the air vehicle; and

[0020] Figure 8 It is shown Figure 5The view shown illustrates the operation of increasing the indoor pressure of an air vehicle. Detailed Implementation

[0021] Although exemplary embodiments are described as using multiple units to perform exemplary processes, it should be understood that exemplary processes can also be performed by one or more modules. Furthermore, it should be understood that the term controller / control unit refers to a hardware device that includes a memory and a processor and is specifically programmed to perform the processes described herein. The memory is configured to store modules, and the processor is specifically configured to execute said modules to perform one or more processes further described below.

[0022] Furthermore, the control logic of this invention can be embodied in a non-transitory computer-readable medium containing executable program instructions that are executed by a processor, controller / control unit, etc. Examples of computer-readable media include, but are not limited to, ROM, RAM, optical disc (CD)-ROM, magnetic tape, floppy disk, flash drive, smart card, and optical data storage device. The computer-readable recording medium can also be distributed across a network-connected computer system, allowing the computer-readable medium to be stored and executed in a distributed manner, for example, via a telematics server or controller area network (CAN).

[0023] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Where possible, the same reference numerals will be used throughout the drawings to refer to the same or similar parts.

[0024] In the following description, a system for increasing the indoor pressure of an air vehicle according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

[0025] Figure 1 This is a view illustrating a system for increasing the indoor pressure of an air vehicle according to an embodiment of the present invention. Figure 2 It is shown Figure 1 A view showing the construction of a system for increasing the indoor pressure of an air vehicle. Figure 3 It is shown Figure 1 The view shown illustrates the operation of increasing the indoor pressure of an air vehicle. Figure 4 It is shown Figure 1 A view showing the cooling operation of the interior space of an airborne vehicle. Figure 5 This is a view illustrating a system for increasing the indoor pressure of an air vehicle according to another embodiment of the present invention. Figure 6 It is shown Figure 5 A view showing the heating operation of the interior space of an aerial vehicle. Figure 7 It is shown Figure 5 A view showing the cooling operation of the interior space of an airborne vehicle. Figure 8It is shown Figure 5 The view shown illustrates the operation of increasing the indoor pressure of an air vehicle.

[0026] like Figure 1 and Figure 2 As shown, a system for increasing the indoor pressure of an air vehicle according to an embodiment of the present invention may include a refrigerant line 10 through which refrigerant circulates, and the line includes a compressor 11, a condenser 12, an expander 13, and an evaporator 14; a first air line 20, which is connected to the refrigerant line 10 upstream of the compressor 11 via a first valve V1 and branches off from it and connects to the outside; a second air line 30, which is connected to the refrigerant line 10 downstream of the compressor 11 via a second valve V2 and branches off from it and connects to the indoor space; and a third valve V3, which is configured to... The refrigerant or air flowing in the second air line 30 is placed in the second air line 30 to selectively flow to the outside or indoor space; and the controller 100, in response to receiving information that the air vehicle M has malfunctioned, is configured to operate the first valve V1 and the second valve V2 to allow outdoor air to flow into the first air line 20, the refrigerant line 10 and the second air line 30 by starting the compressor 11, and to operate the third valve V3 to allow the refrigerant to be discharged to the outside, and then allow air to flow into the indoor space after the refrigerant discharge is completed.

[0027] Specifically, compressor 11 and the valves are operated by controller 100. Controller 100 can be configured to operate the valves based on the desired temperature of the indoor space or based on whether the condition of the air vehicle M is abnormal, to supply conditioned air to the indoor space or maintain indoor pressure. Refrigerant line 10 is configured such that refrigerant cools air while circulating through compressor 11, condenser 12, expander 13, and evaporator 14, and the cooled air is supplied to the indoor space.

[0028] The first air line 20 is connected at its first end to the refrigerant line 10 upstream of the compressor 11 via a first valve V1, and at its second end to the outside. Therefore, under normal conditions, the refrigerant normally circulates in the refrigerant line 10, and when the first valve V1 is opened by the controller 100, outdoor air is supplied to the refrigerant line 10 through the first air line 20 due to the start of the compressor 11.

[0029] Simultaneously, the second air line 30 is connected at its first end to the refrigerant line 10 downstream of the compressor 11 via the second valve V2, and at its second end to the interior space within the air vehicle M. Therefore, under normal conditions, the refrigerant typically circulates in the refrigerant line 10, and when the second valve V2 is opened by the controller 100, the air supplied to the first air line 20 and the refrigerant line 10 flows into the interior space due to the start-up of the compressor 11.

[0030] Therefore, the present invention can maintain indoor pressure by supplying air to the indoor space through a first air line 20 and a second air line 30 using a refrigerant line 10 configured to supply regulated air. However, since the refrigerant circulating in the refrigerant line 10 is a harmful gas, filtration to discharge the refrigerant to the outside is essential as the air flows through the refrigerant line 10 into the indoor space. Therefore, since the system according to the embodiment of the present invention provides a third valve V3 for the second air line 30, the refrigerant or air flowing in the second air line 30 can selectively flow to the outside or indoor space based on the opening or closing action of the third valve V3.

[0031] Therefore, when the controller 100 receives information indicating an abnormal condition of the air vehicle M, the controller 100 can be configured to operate the first valve V1, the second valve V2, and the third valve V3 to allow air to flow through the first air line 20, the refrigerant line 10, and the second air line 30 into the interior space of the air vehicle M. Specifically, the controller 100 can be configured to determine whether the condition of the air vehicle M is abnormal using various sensors. Specifically, an abnormal condition of the air vehicle M may indicate that a fire has occurred in the air vehicle M.

[0032] When the controller 100 determines that the air vehicle is in an abnormal condition, the controller 100 can be configured to control the first valve V1 and the second valve V2, thereby driving the compressor 11 to allow outdoor air to flow into the first air line 20, the refrigerant line 10, and the second air line 30. Specifically, because the refrigerant circulating in the refrigerant line 10 under the control of the controller 100 can flow into the indoor space simultaneously with the air flowing into the indoor space through the first air line 20, the refrigerant line 10, and the second air line 30 when the air vehicle M is in an abnormal condition, the controller 100 initially allows the refrigerant to be discharged to the outside through the third valve V3. After this, when the refrigerant discharge is complete, the controller 100 can be configured to operate the third valve V3 to allow the air flowing in the second air line 30 to flow into the indoor space. At this time, the air with refrigerant removed flows into the indoor space, thereby maintaining the indoor pressure, and further ensuring passenger safety due to the removal of harmful refrigerant.

[0033] The system according to an embodiment of the present invention will now be described in more detail. A first air line 20 is connected at its first end to a refrigerant line 10 via a first valve V1, and at its second end to an air inlet 21 through which air is selectively introduced under the control of a controller 100. Specifically, the air inlet 21 may be configured to selectively introduce air under the control of the controller 100, and may be located at the front of the air vehicle device M, so that outdoor air can be easily introduced into the first air line 20 through the air inlet 21.

[0034] Therefore, the air inlet 21 remains closed when the air vehicle M is in a normal state, and opens when a signal indicating an abnormal state of the air vehicle M is input to the controller 100, allowing air to be introduced into the first air line 20 through the air inlet. In other words, in the first air line 20, when the first valve V1 is open toward the refrigerant line 10 and the air inlet 21 is open, air flows through the first air line 20 into the refrigerant line 10.

[0035] Meanwhile, the second air line 30 is connected at its first end to the refrigerant line 10 downstream of the condenser 12 via a second valve V2, and at its second end to the interior space. In other words, since the first end of the second air line 30 is connected to the refrigerant line 10 downstream of the condenser 12, the high-temperature air passing through the compressor 11 is cooled while passing through the condenser 12. Therefore, passengers in the interior space will not experience discomfort due to the high-temperature air passing through the compressor 11.

[0036] Therefore, when the second valve V2 opens toward the second air line 30, the air passing through the first air line 20 and the refrigerant line 10 flows into the interior space of the air vehicle M through the second air line 30 due to the start of the compressor 11. At this time, since the first end of the second air line 30 is connected to the refrigerant line 10 downstream of the condenser 12, the high-temperature air passing through the compressor 11 is cooled, thereby preventing passengers from feeling uncomfortable due to the heat of the air.

[0037] The second air line 30 is equipped with a gas-liquid separator 31 configured to separate air from refrigerant. In other words, the second air line 30 is equipped with a gas-liquid separator 31 because the air pressurized in the compressor 11 needs to be separated from the residual refrigerant in the refrigerant line 10. The gas-liquid separator 31 can employ cyclone centrifugal separation using the density difference between air and refrigerant and high-speed / high-pressure energy, and can additionally separate foreign matter from the intake air. Therefore, since the air flowing in the second air line 30 is filtered to remove refrigerant and foreign matter from the air, safe air that has been de-refrigerant and foreign matter removed can be supplied to the indoor space.

[0038] The first air line 20 may include a first oxygen sensor 22, and the second air line 30 may include a second oxygen sensor 32 disposed upstream of the third valve V3. The controller 100 may be configured to compare the oxygen concentrations input from the first oxygen sensor 22 and the second oxygen sensor 32, and control the opening and closing of the third valve V3 according to the oxygen concentration. The first oxygen sensor 22 and the second oxygen sensor 32 may be configured to check the presence of refrigerant in the air flowing into the indoor space through the second air line 30.

[0039] In other words, since air not passing through refrigerant line 10 flows into the first air line 20, the reference oxygen concentration can be checked by the first oxygen sensor 22, which is necessary to check the presence of refrigerant. Furthermore, since air containing refrigerant flows into the second air line 30 while passing through refrigerant line 10, the oxygen concentration can be checked by the second oxygen sensor 32, which is also necessary to check the presence of refrigerant.

[0040] Therefore, the controller 100 can be configured to compare the oxygen concentrations input from the first oxygen sensor 22 and the second oxygen sensor 32, and determine that the air contains refrigerant when the oxygen concentration measured by the second oxygen sensor 32 is less than the oxygen concentration measured by the first oxygen sensor 22. Furthermore, the controller 100 can be configured to determine that the air that has passed through the refrigerant line 10 does not contain refrigerant when the oxygen concentration measured by the second oxygen sensor 32 is approximately equal to the oxygen concentration measured by the first oxygen sensor 22.

[0041] Therefore, when the oxygen concentration measured by the second oxygen sensor 32 is lower than or greater than the oxygen concentration measured by the first oxygen sensor 22 by a predetermined value, the controller 100 can be configured to operate the third valve V3 to discharge the refrigerant and air flowing through the second air line 30 to the outside. Specifically, a reference concentration pre-stored in the controller 100 can be experimentally set to determine whether the refrigerant content in the air is within a harmful range.

[0042] Therefore, when the airborne vehicle M is in an abnormal state, the controller 100 can be configured to operate the first valve V1 and the second valve V2 to allow outdoor air to flow into the first air line 20, the refrigerant line 10, and the second air line 30 via the start-up of the compressor 11. When the oxygen concentration measured by the second oxygen sensor 32 is less than a predetermined value than the oxygen concentration measured by the first oxygen sensor 22, the controller 100 can be configured to operate the third valve V3 to discharge the refrigerant and air flowing in the second air line 30 to the outside, thereby preventing refrigerant-containing air from flowing into the indoor space.

[0043] Subsequently, when the difference between the oxygen concentration measured by the second oxygen sensor 32 and the oxygen concentration measured by the first oxygen sensor 22 is within a predetermined range, the controller 100 can be configured to determine that the air flowing in the second air line 30 does not contain refrigerant and operate the third valve V3 to allow the air flowing in the second air line 30 to flow into the indoor space. As described above, according to an embodiment of the present invention, when the condition of the air vehicle M is abnormal, outdoor air can be allowed to flow into the indoor space to maintain the indoor pressure, such as... Figure 3 As shown.

[0044] Specifically, the controller 100 can be configured to operate the first valve V1 and the second valve V2 to allow outdoor air to flow into the first air line 20, the refrigerant line 10, and the second air line 30 via the start of the compressor 11, and to operate the third valve V3 to allow refrigerant to be discharged to the outside, and then allow air to flow into the indoor space after the refrigerant discharge is complete, thereby maintaining indoor pressure. This control is based on abnormal conditions of the air vehicle, and is not performed when the air vehicle is in normal condition.

[0045] Simultaneously, when the air vehicle M is in normal condition and requires indoor cooling, the refrigerant circulating in refrigerant line 10 cools the conditioned air supplied to the indoor space, and outdoor air does not flow into the indoor space through refrigerant line 10. Figure 4 As shown. In other words, when the air vehicle M is in normal condition and requires indoor cooling, the controller 100 can be configured to operate the first valve V1 to disconnect the connection between the first air line 20 and the refrigerant line 10, and operate the second valve V2 to disconnect the connection between the refrigerant line 10 and the second air line 30. Therefore, the refrigerant circulates along the refrigerant line 10 through the compressor 11, condenser 12, expander 13, and evaporator 14, and cooling air is generated at the evaporator 14 and supplied to the indoor space via HVAC and delivery pipes.

[0046] like Figure 5 As shown, the system according to an embodiment of the present invention may further include a heat pump line 40, which is connected to a refrigerant line 10 downstream of the compressor 11 via a fourth valve V4, and includes an internal heat exchanger 41 and a heat pump expander 15 disposed between the internal heat exchanger 41 and the condenser 12 in the refrigerant line 10.

[0047] The heat pump line 40, the fourth valve V4, the internal heat exchanger 41, and the heat pump expander 15 are components configured to constitute a heat pump to improve air conditioning efficiency. Specifically, the internal heat exchanger 41, which is installed to provide heat to the indoor space, uses high-temperature refrigerant from the compressor 11 to heat air to produce hot air. The heated air generated by the internal heat exchanger 41 is supplied to the indoor space via HVAC and delivery pipes.

[0048] In other words, when the air vehicle M is in normal condition and requires heating of the interior space, the controller 100 can be configured to operate the first valve V1 to disconnect the connection between the first air line 20 and the refrigerant line 10, and operate the second valve V2 to disconnect the connection between the refrigerant line 10 and the second air line 30, as shown below. Figure 7As shown. In addition, the controller 100 can be configured to operate the fourth valve V4 to connect the refrigerant line 10 to the heat pump line 40, thereby allowing the refrigerant to circulate along the refrigerant line 10 and the heat pump line 40, whereby the high-temperature refrigerant that has passed through the compressor 11 exchanges heat with the air to produce heated air.

[0049] Subsequently, the refrigerant passing through the internal heat exchanger 41 expands through the heat pump expander 15 and flows through the condenser 12, expander 13, and evaporator 14 while performing heat exchange, thereby improving thermal efficiency. When the controller 100 is in normal condition and cooling of the indoor space is required, the controller 100 can be configured to operate the first valve V1 to interrupt the connection between the first air line 20 and the refrigerant line 10, and control the second valve V2 to interrupt the connection between the refrigerant line 10 and the second air line 30, as shown below. Figure 7 As shown. In addition, the controller 100 can be configured to operate the fourth valve V4 to interrupt the connection between the refrigerant line 10 and the heat pump line 40 and to open the heat pump expander 15.

[0050] Therefore, the refrigerant in refrigerant line 10 circulates through compressor 11, condenser 12, expander 13, and evaporator 14, thereby generating cold air at evaporator 14, and the cold air is supplied to the indoor space through HVAC and delivery pipes. Simultaneously, when the condition of the air vehicle M is abnormal, controller 100 can be configured to operate first valve V1, second valve V2, and fourth valve V4 to allow outdoor air to flow through compressor 11 to the first air line 20, refrigerant line 10, and second air line 11, and to operate third valve V3 to discharge refrigerant to the outside, and then allow air to flow into the indoor space after the refrigerant discharge is complete. Figure 8 As shown.

[0051] In other words, the controller 100 can be configured to operate the first valve V1, the second valve V2, and the fourth valve V4 to allow outdoor air to flow through the compressor 11 to the first air line 20, the refrigerant line 10, and the second air line 30, and to operate the third valve V3 to allow refrigerant to be discharged to the outside, and then allow air to flow into the indoor space after the refrigerant discharge is completed, thereby maintaining the indoor pressure.

[0052] When controller 100 receives information indicating a decrease in indoor pressure, controller 100 can be configured to increase the driving capacity of compressor 11. In other words, controller 100 can be configured to receive information about indoor pressure from sensors located in the indoor space. When controller 100 receives information indicating a decrease in indoor pressure due to an abnormal state of the air vehicle M, controller 100 can be configured to increase the driving capacity of compressor 11, thereby increasing the amount of air flowing into the indoor space. This maintains indoor pressure, thus preventing the introduction of harmful external gases into the indoor space.

[0053] As can be clearly seen from the above description, the system configuration for increasing the indoor pressure of an air vehicle according to the present invention is to maintain the indoor pressure of the air vehicle using an air conditioning unit installed in the air vehicle without the need for additional equipment and without increasing the weight of the fuselage, thereby preventing the introduction of harmful external gases into the indoor space and thus ensuring passenger safety.

[0054] Although exemplary embodiments of the invention have been disclosed for illustrative purposes, those skilled in the art will understand that various modifications, additions, and substitutions can be made without departing from the scope and spirit of the invention as disclosed in the appended claims.

Claims

1. A system for increasing the indoor pressure of an air vehicle, comprising: A refrigerant line through which refrigerant circulates, and the refrigerant line includes a compressor, a condenser, an expander, and an evaporator; A first air line, which is connected via a first valve to a refrigerant line upstream of the compressor and branches off from it to the outside; The second air line is connected to the refrigerant line downstream of the compressor via a second valve and branches off from it, connecting to the indoor space; A third valve is disposed in the second air line to allow refrigerant or air flowing in the second air line to selectively flow to an external or indoor space; as well as When the air vehicle is in an abnormal state, the controller is configured to operate the first valve and the second valve to allow outdoor air to flow into the first air line, the refrigerant line and the second air line through the start of the compressor, and to operate the third valve to allow refrigerant to be discharged to the outside, and then allow air to flow into the indoor space after the refrigerant discharge is completed.

2. The system according to claim 1, wherein, The first air line is connected to the refrigerant line at its first end via the first valve and to the air inlet at its second end, through which air is selectively introduced under the control of the controller.

3. The system according to claim 2, wherein, The air intake is normally kept closed, but opens when the controller receives information that the air vehicle is in an abnormal state.

4. The system according to claim 1, wherein, The second air line is connected at its first end to the refrigerant line downstream of the condenser via the second valve, and at its second end to the indoor space.

5. The system according to claim 1, wherein, The second air line is equipped with a gas-liquid separator configured to separate the refrigerant from the air.

6. The system according to claim 1, wherein, The first air line is equipped with a first oxygen sensor, and the second air line is equipped with a second oxygen sensor located upstream of the third valve. The controller is configured to compare the oxygen concentrations input from the first oxygen sensor and the second oxygen sensor to control the opening and closing of the third valve.

7. The system according to claim 6, wherein, When the oxygen concentration input from the second oxygen sensor is lower than the oxygen concentration input from the first oxygen sensor by a predetermined value or more, the controller is configured to operate the third valve so that the refrigerant and air flowing in the second air line can be discharged to the outside.

8. The system according to claim 1, wherein, When the air vehicle is in normal condition and requires cooling of the interior space, the controller is configured to operate the first valve and the second valve to generate cooling air in the evaporator.

9. The system according to claim 1, further comprising: A heat pump line, which is connected to the refrigerant line downstream of the compressor via a fourth valve and includes an internal heat exchanger; as well as A heat pump expander is located between the internal heat exchanger and condenser in the refrigerant pipeline.

10. The system according to claim 9, wherein, When the air vehicle is in normal condition and requires heating of the indoor space, the controller is configured to operate the first valve, the second valve, and the fourth valve to allow refrigerant to circulate through the refrigerant pipeline and the heat pump pipeline, thereby generating heated air through the internal heat exchanger.

11. The system according to claim 9, wherein, When the air vehicle is in an abnormal state, the controller is configured to operate the first valve, the second valve, and the fourth valve to allow outdoor air to flow into the first air line, the refrigerant line, and the second air line, and to control the third valve to discharge refrigerant to the outside, and then allow air to flow into the indoor space after the refrigerant discharge is completed.

12. The system according to claim 1, wherein, When the controller receives information that the indoor pressure has decreased, the controller is configured to increase the drive of the compressor.

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