Helicopter cockpit evaporative cycle refrigeration system

Abstract

The utility model relates to the field of helicopter refrigeration, provide helicopter cockpit evaporation cycle refrigeration system, including compressor, condenser subassembly, left evaporator subassembly, right evaporator subassembly, refrigeration electric control box and refrigerant pipeline, the condenser subassembly includes condenser core body, condensing fan cover and condensing fan constitute, and the export of condensing fan is communicated with the heat exchange cavity of the air -borne oxygen -making nitrogen -making gas source radiator through the air pipe. The mode of two evaporators driven by one compressor and one condenser is used to realize the refrigeration of the left and right areas of the cockpit, and the relative two sets of independent air conditioning systems can save installation space and reduce energy consumption; through the condensing fan cover and fan of the condenser air outlet end, the heat dissipation of the condenser is realized, and the heat-exchanged air is used for the air-cooled condenser of the air -borne oxygen -making nitrogen -making gas source radiator, the heat in the heat exchanger is taken out and discharged to the outside of the helicopter, an independent fan can be saved, and the energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of helicopter refrigeration, specifically to an evaporative cooling system for a helicopter cockpit. Background Technology

[0002] The evaporative cooling system in a helicopter cockpit primarily functions to cool, ventilate, and control the temperature of the cockpit, thereby ensuring a suitable working environment for the helicopter crew and maintaining the overall combat effectiveness of the crew and the aircraft. The evaporative cooling system needs to cool the cockpit while also providing airflow to the oxygen and nitrogen generator radiators.

[0003] To simultaneously cool both the left and right sides of the cockpit, there are two options for the evaporator assembly: a unified design and a separate design. Due to the limited installation space for the evaporator assembly, and the lack of space for an evaporator fan within the assembly itself, a design where the aircraft provides the circulating airflow is chosen. Based on the location of the onboard circulating fan, a separate evaporator assembly design is selected, resulting in a left and a right evaporator assembly. The separate design means that both the left cockpit evaporator assembly and the right cabin evaporator assembly are equipped with their own compressors and condensers, with independent cooling cycles for each space. This design has significant disadvantages, including large space requirements and high power consumption, and cannot meet installation and operational requirements. The oxygen and nitrogen generator source radiator requires a large airflow for cooling. If a separate radiator fan is installed, it will occupy the limited installation space inside the helicopter, affecting subsequent installation and maintenance, and the installation of the fan will increase the helicopter's power consumption. Summary of the Invention

[0004] In order to meet the cooling needs of the helicopter cockpit and the heat dissipation needs of the oxygen and nitrogen generator radiators, and to save installation space on the aircraft, this utility model provides a helicopter cockpit evaporative cycle cooling system.

[0005] The technical solution adopted by this utility model is as follows: The helicopter cockpit evaporative cooling system includes a compressor, a condenser assembly, a left evaporator assembly, a right evaporator assembly, a refrigeration control box, and refrigerant piping. The condenser assembly comprises a condenser core, a condenser shroud, and a condenser fan. The condenser shroud is installed on the air outlet side of the condenser core and includes a square cover corresponding to the outer contour of the condenser and a duct installed at the center of the square cover. The duct is a 90° bend, vertically downward. The condenser fan is installed at the end of the duct away from the square cover. The condenser fan and the duct are connected by a flange and bolts, and the connection surface is sealed with a sealing ring. A pair of mounting brackets are provided on the outside of the condenser fan, and the mounting brackets are fixed to the internal structure of the cockpit. The outlet of the condenser fan is connected to the heat exchange chamber of the airborne oxygen / nitrogen generator radiator through a duct and is discharged to the outside of the cockpit through an exhaust pipe.

[0006] Furthermore, the left evaporator assembly and the right evaporator assembly are respectively installed on the left and right sides of the cockpit. The left and right evaporator assemblies each include an evaporator housing, an evaporator core, and an expansion valve. The front and rear sides of the evaporator housing are respectively provided with an air inlet and an air outlet. The evaporator core is installed between the air inlet and the air outlet. The expansion valve is installed in the refrigerant pipeline between the condenser and the evaporator.

[0007] Furthermore, the air inlet of the evaporator is connected to the onboard fresh air duct, the air outlet is equipped with an air outlet grille, the air outlet includes an air outlet pipe and a funnel-shaped air outlet cavity, and the air outlet pipe is installed at the center of the air outlet cavity.

[0008] Furthermore, the refrigerant outlet pipe of the condenser is connected to the core of the two evaporator assemblies via a tee, and the refrigerant pipes of the cores of the two evaporator assemblies are connected to the suction port of the compressor via a tee.

[0009] Furthermore, a pair of mounting brackets are symmetrically installed on both sides of the outer cylindrical surface of the condenser fan. Each mounting bracket includes an arc-shaped mounting seat and a mounting plate perpendicular to the mounting seat. The arc of the mounting seat fits the outer cylindrical surface of the condenser fan. An elbow plate is welded between the mounting plate and the mounting seat. Weight reduction holes are provided on the mounting seat, the mounting plate, and the elbow plate.

[0010] Furthermore, the condenser core integrates a liquid receiver and a drying filter, and the evaporator core integrates an expansion valve.

[0011] Furthermore, the compressor is a variable frequency electric scroll compressor, and the compressor is powered by an onboard power supply.

[0012] Furthermore, the refrigeration control box includes a data acquisition and control board, a power supply board, an AC detection board, an AC contactor, and an electrical connector. Under the control of the host computer, the refrigeration control box controls the condenser fan and compressor, and uploads sensor and fault status information.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: the cooling of the left and right areas of the cockpit is achieved by using one compressor and one condenser to drive two evaporators, which can save installation space and reduce energy consumption compared to two independent air conditioning systems; by using the condenser shroud and fan to draw air from the air outlet of the condenser, the condenser can be cooled while the air after heat exchange can be used for the air-cooled condensation of the airborne oxygen and nitrogen source heat exchanger, and the heat in the heat exchanger can be carried out and discharged to the outside of the helicopter, which can save an independent fan and reduce energy consumption. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the control principle of this utility model.

[0016] In the diagram: 1. Compressor assembly 2. Condenser core 21. Condenser shroud 22. Condenser fan 23. Liquid receiver 24. Mounting bracket 25. Left evaporator assembly 3. Evaporator housing 31. Evaporator core 32. Air inlet 33. Air outlet 34. Air outlet grille 35. Right evaporator assembly 4. Refrigeration control box 5. Refrigerant piping 6. Oxygen / nitrogen generator radiator 7. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings: like Figure 1-2 As shown, the helicopter cockpit evaporative cooling system comprises a compressor 1, a condenser assembly 2, a left evaporator assembly 3, a right evaporator assembly 4, a refrigeration control box 5, and refrigerant piping 6. It is used for cooling the left and right sides of the helicopter cockpit and also for cooling the oxygen / nitrogen generator radiator 7. The exhaust port of the compressor 1 is connected to the condenser assembly 2 via refrigerant piping. The refrigerant outlet pipe within the condenser assembly 2 is connected to the cores of the two evaporator assemblies via a tee. The refrigerant piping of the cores of the two evaporator assemblies is connected to the suction port of the compressor 1 via a tee, completing the refrigerant compression and refrigeration cycle.

[0018] Compressor 1 is a variable frequency electric scroll compressor, which has the advantages of small size, light weight and high volumetric efficiency. At the same time, it adopts DC permanent magnet variable frequency technology, which can automatically adjust the output power of the compressor according to the environment and requirements, so that the evaporative cycle refrigeration system can operate efficiently and stably in high temperature and low temperature environments. It is not easy to frost in low temperature environments. The compressor is powered by the on-board power supply.

[0019] The condenser assembly 2 consists of a condenser core 21, a condenser shroud 22, and a condenser fan 23. The condenser core 21 adopts a parallel flow structure, integrating the liquid receiver 24 and the filter onto the condenser core 21. The condenser shroud 22 is installed on the air outlet side (hot air side) of the condenser core. The condenser shroud 22 includes a square cover corresponding to the outer contour of the condenser and an air guide pipe installed at the center of the square cover. The air guide pipe is a 90° elbow pipe, bending vertically downwards. The condenser fan 23 is installed at the end of the air guide pipe away from the square cover. The condenser fan 23 is connected to the air guide pipe 23 by flanges and bolts, and the connection surface between the condenser fan 23 and the air guide pipe is sealed by a sealing ring. The condenser fan 23 draws cold air from inside the helicopter into the condenser core 21 for heat exchange. After heat exchange, the air is sent from the condenser shroud 22 through pipes to the onboard oxygen and nitrogen generator radiator 7 to achieve air-cooled heat exchange. The condenser fan meets the airflow requirement of 3600 cubic meters per hour. After heat exchange, the heat is carried out and discharged to the outside of the helicopter through the exhaust pipe.

[0020] A pair of mounting brackets 25 are provided on the outside of the condenser fan 23, and the mounting brackets 25 are fixed to the internal structure of the cockpit. The pair of mounting brackets 25 are symmetrically installed on both sides of the outer cylindrical surface of the condenser fan 23. The mounting bracket includes an arc-shaped mounting seat and a mounting plate perpendicular to the mounting seat. The arc of the mounting seat fits the outer circular surface of the condenser fan. An elbow plate is welded between the mounting plate and the mounting seat. Weight reduction holes are provided on the mounting seat, the mounting plate and the elbow plate respectively.

[0021] The left evaporator assembly 3 and the right evaporator assembly 4 are respectively installed on the left and right sides of the cockpit. Each evaporator assembly includes an evaporator housing 31, an evaporator core 32, and an expansion valve, with the expansion valve integrated into the evaporator core 32. The evaporator housing 21 has an air inlet 33 and an air outlet 34 on its front and rear sides, respectively. The evaporator core 32 is installed between the air inlet 33 and the air outlet 34. The expansion valve is installed in the refrigerant piping between the condenser and the evaporator. Due to space limitations, the evaporator assembly cannot be equipped with an independent fan. The air inlet of the evaporator assembly is connected to the onboard fresh air duct, and the air outlet is equipped with an air outlet grille 35. The air outlet includes an air outlet pipe and a funnel-shaped air outlet cavity, with the air outlet pipe installed at the center of the air outlet cavity.

[0022] The refrigeration control box 5 includes a data acquisition and control board, a power supply board, an AC detection board, AC contactors, and electrical connectors. Under the control of the host computer, the refrigeration control box performs start / stop control of the condenser fan and compressor according to the control commands issued, and simultaneously uploads return air, defrost temperature, and fault status information, thereby achieving control of the cabin temperature.

Claims

1. A helicopter cockpit evaporative cooling system, comprising a compressor, a condenser assembly, a left evaporator assembly, a right evaporator assembly, a refrigeration control box, and refrigerant piping, characterized in that, The condenser assembly comprises a condenser core, a condenser shroud, and a condenser fan. The condenser shroud is installed on the air outlet side of the condenser core. The condenser shroud includes a square cover corresponding to the outer contour of the condenser and an air guide pipe installed at the center of the square cover. The air guide pipe is a 90° elbow pipe, bent vertically downwards. The condenser fan is installed at the end of the air guide pipe away from the square cover. The condenser fan and the air guide pipe are connected by flanges and bolts, and the connection surface is sealed by a sealing ring. A pair of mounting brackets are provided on the outside of the condenser fan, and the mounting brackets are fixed to the internal structure of the cockpit. The outlet of the condenser fan is connected to the heat exchange chamber of the airborne oxygen and nitrogen generator radiator through an air duct, and is discharged to the outside of the cockpit through an exhaust pipe.

2. The helicopter cockpit evaporative cooling system according to claim 1, characterized in that, The left and right evaporator assemblies are respectively installed on the left and right sides of the cockpit. The left and right evaporator assemblies each include an evaporator housing, an evaporator core, and an expansion valve. The front and rear sides of the evaporator housing are respectively provided with an air inlet and an air outlet. The evaporator core is installed between the air inlet and the air outlet. The expansion valve is installed in the refrigerant pipeline between the condenser and the evaporator.

3. The helicopter cockpit evaporative cooling system according to claim 2, characterized in that, The air inlet of the evaporator is connected to the onboard fresh air duct, and the air outlet is equipped with an air outlet grille. The air outlet includes an air outlet pipe and a funnel-shaped air outlet cavity, with the air outlet pipe installed at the center of the air outlet cavity.

4. The helicopter cockpit evaporative cooling system according to claim 1, characterized in that, The refrigerant outlet pipe of the condenser is connected to the core of the two evaporator assemblies via a tee, and the refrigerant pipes of the cores of the two evaporator assemblies are connected to the suction port of the compressor via a tee.

5. The helicopter cockpit evaporative cooling system according to claim 1, characterized in that, A pair of mounting brackets are symmetrically installed on both sides of the outer cylindrical surface of the condenser fan. Each mounting bracket includes an arc-shaped mounting seat and a mounting plate perpendicular to the mounting seat. The arc of the mounting seat fits the outer cylindrical surface of the condenser fan. An elbow plate is welded between the mounting plate and the mounting seat. Weight reduction holes are provided on the mounting seat, the mounting plate, and the elbow plate.

6. The helicopter cockpit evaporative cooling system according to claim 2, characterized in that, The condenser core integrates a liquid receiver and a drying filter, and the evaporator core integrates an expansion valve.

7. The helicopter cockpit evaporative cooling system according to claim 1, characterized in that, The compressor is a variable frequency electric scroll compressor, which is powered by an onboard power supply.

8. The helicopter cockpit evaporative cooling system according to claim 1, characterized in that, The refrigeration control box includes a data acquisition and control board, a power supply board, an AC detection board, an AC contactor, and an electrical connector. Under the control of the host computer of the refrigeration control box, it controls the condenser fan and the compressor, and uploads sensor and fault status information.

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