Helicopter cabin air conditioning system

Abstract

The utility model relates to a helicopter refrigeration device, and provides a helicopter cabin air-conditioning system. Comprising a compressor, a condenser, an evaporator and an electric appliance part. The evaporator comprises a shell, an air inlet cover and an air outlet cover are arranged on the two sides of the shell respectively, the air inlet cover and the air outlet cover are provided with an air inlet and an air outlet respectively, and the air inlet and the air outlet are connected to a circulating air pipeline of the helicopter in series. The evaporator core comprises two parallel flow heat exchangers, a connecting plate is arranged between the two parallel flow heat exchangers, two sets of refrigerant inlets and refrigerant outlets are formed in the bottom of the connecting plate, and expansion valves are installed at the refrigerant inlets and the refrigerant outlets. The evaporator is connected to the circulating air system of the helicopter in series on the two sides of the evaporator shell through the air inlet and the air outlet, use of an evaporator fan is avoided, the size of the evaporator is reduced, and installation is convenient; a pair of parallel flow heat exchangers is installed in the evaporator, an inlet pipe, an outlet pipe and an expansion valve of the evaporator are installed on a connecting plate, and the size of the evaporator and arrangement of pipelines are effectively reduced.

Description

Technical Field

[0001] The utility model relates to a helicopter refrigeration device, in particular to a helicopter cabin air conditioning system. Background Art

[0002] Helicopters use evaporative cycle refrigeration and air conditioning systems to cool the cabin, maintaining the cabin temperature within a certain range in high temperature environments to ensure the comfort of the pilot. Due to the limited space in the cabin, conventional air conditioning systems cannot be installed, and a special air conditioning system needs to be designed based on the limited space in the cabin.

[0003] The installation space of the evaporator assembly in the cockpit of a special helicopter model is narrow, and there is not enough space in the cockpit to install the evaporator fan. Conventional evaporators all use a single-core structure, and the heat exchange capacity of the single core is limited, which cannot meet the cooling needs in high-temperature environments. Adding a heat exchange core will increase the installation space occupied by it and increase the layout of the pipeline. The core of a conventional condenser is usually set vertically to ensure the uniform flow of the gas-liquid mixed refrigerant in the condenser. Due to space limitations in the helicopter cockpit, the condenser core can only be placed horizontally. Summary of the invention

[0004] In order to ensure that the air-conditioning system has a good heat exchange effect and meet the installation requirements in the limited space of the cabin, the utility model provides a helicopter cabin air-conditioning system.

[0005] The technical solution adopted by the utility model is:

[0006] The helicopter cabin air conditioning system includes a compressor, a condenser, an evaporator and electrical components. The compressor compresses the refrigerant and sends it to the condenser. The refrigerant condensed by the condenser enters the evaporator. The refrigerant after heat exchange in the evaporator returns to the compressor for compression to complete the refrigeration cycle. The electrical components are electrically connected to the compressor, condenser and evaporator through cables and connectors respectively; the evaporator includes a shell, and an air inlet hood and an air outlet hood are respectively provided on both sides of the shell. The air inlet hood and the air outlet hood are respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are connected in series to the circulating air duct of the helicopter; an evaporator core is installed in the shell, and the evaporator core The evaporator core is vertically arranged and located between the air inlet hood and the air outlet hood, and includes two parallel flow heat exchangers, which are vertically arranged and fixedly installed inside the shell. A connecting plate is provided between the two parallel flow heat exchangers, and two groups of refrigerant inlet and outlet are provided at the bottom of the connecting plate. An evaporator inlet pipe and an evaporator outlet pipe are provided on the top of the connecting plate. The evaporator inlet pipe and the evaporator outlet pipe are respectively connected to two refrigerant inlets and two refrigerant outlets through channels inside the connecting plate. Each group of refrigerant inlets and outlets are connected to the corresponding parallel flow heat exchangers through refrigerant pipes, and expansion valves are installed between the refrigerant pipes and the refrigerant inlets and outlets.

[0007] Furthermore, an upper cover is installed on the top of the shell, a square hole is provided in the center of the upper cover, a raised portion corresponding to the square hole is provided on the top of the connecting plate, and the evaporator inlet pipe and the evaporator outlet pipe are installed on the raised portion of the connecting plate.

[0008] Furthermore, a liquid collecting box is installed at the bottom of the shell, the liquid collecting box is funnel-shaped, and a drain pipe is installed at the bottom of the liquid collecting box.

[0009] Furthermore, a circle of mounting plates is provided on the outer side of the shell, mounting holes are provided on the mounting plates, and the mounting plates are fixedly connected to the side walls of the shell through mounting angle irons.

[0010] Furthermore, the cross-sections of the air inlet cover and the air outlet cover gradually decrease from the inside to the outside of the evaporator, and the axes of the air inlet and the air outlet are provided with a height difference in the vertical direction.

[0011] Furthermore, a temperature sensor is installed on the refrigerant pipeline, and the temperature sensor is fixed to the refrigerant pipeline by a cable tie.

[0012] Furthermore, the refrigerant pipeline is connected to the expansion valve through a double-port joint.

[0013] Furthermore, the condenser includes a condenser shell, a fan is installed at the bottom of the condenser shell, the top of the shell is open, and an air outlet corresponding to the fan is provided at the bottom. A horizontal condenser core is installed on the top of the condenser shell, and a condenser inlet pipe and a condenser outlet pipe are connected to both sides of the condenser core. The condenser outlet pipe is connected to the evaporator inlet pipe, and a liquid storage tank is installed on the condenser outlet pipe.

[0014] After adopting the above technical scheme, the beneficial effects of the utility model are:

[0015] By connecting the evaporator in series to the helicopter's circulating air system through air inlets and outlets on both sides of the evaporator shell, the use of an evaporator fan is avoided, the size of the evaporator is reduced, and installation is facilitated; a pair of parallel flow heat exchangers are installed inside the evaporator, and the evaporator inlet and outlet pipes and the expansion valve are installed on the connecting plate installed in the middle of the pair of parallel flow heat exchangers. The evaporator inlet and outlet pipes are connected to the expansion valve component through an internal channel, which effectively reduces the size of the evaporator and the layout of the pipeline.

[0016] Installing a liquid storage tank on the condenser outlet pipe of the condenser can effectively improve the flow of refrigerant in the condenser core, solve the problem of poor fluidity caused by the horizontal installation of the condenser core, and ensure the heat exchange effect of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 Schematic diagram of the evaporator structure.

[0019] Figure 3 Schematic diagram of the structure of the evaporator core.

[0020] Figure 4 It is a structural diagram of the connecting plate.

[0021] Figure 5 Schematic diagram of the condenser structure.

[0022] In the figure: compressor 1, condenser 2, shell 21, condenser core 22, fan 23, condenser inlet pipe 24, condenser outlet pipe 25, liquid storage tank 3, evaporator 4, shell 41, mounting plate 411, mounting angle iron 412, evaporator core 42, parallel flow heat exchanger 421, connecting plate 422, two expansion valves 423, refrigerant pipeline 424, refrigerant inlet 425, refrigerant outlet 426, double-port joint 427, upper cover 43, liquid collecting box 44, air inlet hood 45, air outlet hood 46, air inlet 47, air outlet 48, evaporator inlet pipe 49, evaporator outlet pipe 40, electrical component 5. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings:

[0024] like Figure 1 As shown, the helicopter cabin air conditioning system is composed of a compressor 1, a condenser 2, a liquid storage tank 3, an evaporator 4, an electrical component 5, and related cables and pipes. The electrical component 5 is electrically connected to the compressor 1, the condenser 2, and the evaporator 3 through cables and connectors, respectively, to provide power, collect information such as temperature and pressure, and control the operation of each component. The compressor 1 compresses the refrigerant and sends it to the condenser 2. The refrigerant condensed by the condenser 2 enters the evaporator 4 through the liquid storage tank 3. The evaporator 4 is connected in series to the pipeline of the circulating air system of the helicopter. The refrigerant is throttled in the evaporator 4 and exchanges heat with the air in the pipeline of the circulating air system to cool the air. The refrigerant after heat exchange returns to the compressor 1 for compression to complete the refrigeration cycle. The cooled air in the circulating air system provides cold air for the helicopter cabin.

[0025] Compressor 1 adopts a high-reliability variable-frequency electric scroll compressor, which has the advantages of small size, light weight and high volumetric efficiency. It also 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, and it is not easy to frost when operating in low-temperature environments.

[0026] The condenser 2 is composed of a condenser shell 21, a condenser core 22 and a fan 23. The fan 23 is installed at the bottom of the condenser shell 21, and the condenser core 22 is horizontally installed on the upper part of the condenser shell 21. The two sides of the condenser core 22 are connected with a condenser inlet pipe 24 and a condenser outlet pipe 25. The condenser outlet pipe 25 is installed with a liquid storage tank 3, and the condenser outlet pipe 25 is connected to the evaporator inlet pipe 49. The top of the condenser shell 21 is open, and the bottom of the condenser shell 21 is provided with an air outlet corresponding to the fan 23. The fan 23 takes in air from the top opening of the condenser shell 21, passes through the condenser core 22 for heat exchange, and then is discharged from the bottom of the condenser shell 21 through the wind guide cover to the outside of the helicopter.

[0027] The evaporator 4 is composed of a shell 41, an evaporator core 42, an upper cover 43 and a liquid collecting box 44. An air inlet cover 45 and an air outlet cover 46 are provided on both sides of the shell 41, which are connected to the inside of the shell. The cross-sections of the air inlet cover 45 and the air outlet cover 46 gradually decrease from the inside to the outside of the evaporator 4. The air inlet cover 45 and the air outlet cover 46 are provided with an air inlet 47 and an air outlet 48 respectively. The axes of the air inlet 47 and the air outlet 48 are provided with a height difference in the vertical direction, which increases the heat exchange time of the air in the evaporator 4, improves the heat exchange efficiency, and avoids the air from entering and exiting directly.

[0028] The evaporator core 42 is installed inside the shell 41. The evaporator core 42 is vertically arranged and located between the air inlet cover 45 and the air outlet cover 46. The evaporator core 42 consists of two parallel flow heat exchangers 421, a connecting plate 422, two expansion valves 423 and two groups of refrigerant pipes 424. The two parallel flow heat exchangers 421 are vertically arranged and fixedly installed inside the shell 41, and the connecting plate 422 is arranged between the two parallel flow heat exchangers 421. Two groups of refrigerant inlet and outlet are arranged at the bottom of the connecting plate 422, two refrigerant inlets 425 are installed on the inside and symmetrically distributed, and two refrigerant outlets 426 are installed on the outside and symmetrically distributed. An evaporator inlet pipe 49 and an evaporator outlet pipe 40 are arranged on the top of the connecting plate 422, and the evaporator inlet pipe 49 and the evaporator outlet pipe 40 are respectively connected to the two refrigerant inlets 425 and the two refrigerant outlets 426 through the channels processed inside the connecting plate 422, so as to avoid the arrangement of the pipelines. The refrigerant inlet and outlet of each group are connected to the corresponding expansion valve 423, and the expansion valve 423 is connected to the corresponding parallel flow heat exchanger 421 through the double-port joint 427 and the refrigerant pipeline 424. A temperature sensor is installed on the refrigerant pipeline 424, and the temperature sensor is fixed to the refrigerant pipeline by a cable tie to collect and feed back temperature information to the electrical components.

[0029] An upper cover 43 is installed on the top of the shell 41. A square hole is provided in the center of the upper cover 43. A protrusion corresponding to the square hole is provided on the top of the connecting plate 422. The connecting plate 422 is fixedly connected to the upper cover 43. The evaporator inlet pipe 49 and the evaporator outlet pipe 40 are installed on the protrusion of the connecting plate 422. A liquid collecting box 44 is installed at the bottom of the shell 41. The liquid collecting box 44 is funnel-shaped and communicates with the inner side of the shell. The condensed water on the evaporator core 42 drips into the bottom of the shell and enters the liquid collecting box 44. A drain pipe is installed at the bottom of the liquid collecting box 44 for draining the condensed water. A circle of mounting plates 411 is provided on the outside of the shell. The mounting plates 411 are fixedly connected to the side walls of the shell 41 through mounting angle irons 412. Mounting holes are provided on the mounting plate 411 for mounting and fixing the evaporator.

Claims

1. A helicopter cabin air conditioning system, comprising a compressor, a condenser, an evaporator and electrical components, wherein the compressor compresses the refrigerant and sends it to the condenser, the refrigerant condensed by the condenser enters the evaporator, and the refrigerant after heat exchange in the evaporator returns to the compressor for compression to complete the refrigeration cycle, and the electrical components are electrically connected to the compressor, the condenser and the evaporator through cables and connectors respectively; characterized in that: The evaporator includes a shell, and an air inlet hood and an air outlet hood are respectively provided on both sides of the shell, and the air inlet hood and the air outlet hood are respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are connected in series with the circulating air duct of the helicopter; an evaporator core is installed in the shell, and the evaporator core is vertically arranged and located between the air inlet hood and the air outlet hood. The evaporator core includes two parallel flow heat exchangers, and the two parallel flow heat exchangers are vertically arranged and fixedly installed inside the shell. A connecting plate is provided between the two parallel flow heat exchangers, and two groups of refrigerant inlet and outlet are provided at the bottom of the connecting plate, and an evaporator inlet pipe and an evaporator outlet pipe are provided at the top of the connecting plate. The evaporator inlet pipe and the evaporator outlet pipe are respectively connected to two refrigerant inlets and two refrigerant outlets through the channel inside the connecting plate, and each group of refrigerant inlet and outlet are connected to the corresponding parallel flow heat exchanger through a refrigerant pipeline, and an expansion valve is installed between the refrigerant pipeline and the refrigerant inlet and outlet.

2. The helicopter cabin air conditioning system according to claim 1, characterized in that: An upper cover is installed on the top of the shell, a square hole is provided in the center of the upper cover, a raised portion corresponding to the square hole is provided on the top of the connecting plate, and the evaporator inlet pipe and the evaporator outlet pipe are installed on the raised portion of the connecting plate.

3. The helicopter cabin air conditioning system according to claim 1, characterized in that: A liquid collecting box is installed at the bottom of the shell, the liquid collecting box is in a funnel shape, and a drain pipe is installed at the bottom of the liquid collecting box.

4. The helicopter cabin air conditioning system according to claim 1, characterized in that: A circle of mounting plates is arranged on the outer side of the shell, mounting holes are arranged on the mounting plates, and the mounting plates are fixedly connected to the side walls of the shell through mounting angle irons.

5. The helicopter cabin air conditioning system according to claim 1, characterized in that: The cross-sections of the air inlet cover and the air outlet cover gradually decrease from the inside to the outside of the evaporator, and the axes of the air inlet and the air outlet are provided with a height difference in the vertical direction.

6. The helicopter cabin air conditioning system according to claim 1, characterized in that: A temperature sensor is installed on the refrigerant pipeline, and the temperature sensor is fixed to the refrigerant pipeline by a cable tie.

7. The helicopter cabin air conditioning system according to claim 1, characterized in that: The refrigerant pipeline is connected to the expansion valve through a double-port joint.

8. The helicopter cabin air conditioning system according to claim 1, characterized in that: The condenser includes a condenser shell, a fan is installed at the bottom of the condenser shell, the top of the shell is open, and an air outlet corresponding to the fan is provided at the bottom. A horizontal condenser core is installed on the top of the condenser shell, and a condenser inlet pipe and a condenser outlet pipe are connected to both sides of the condenser core. The condenser outlet pipe is connected to the evaporator inlet pipe, and a liquid storage tank is installed on the condenser outlet pipe.

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