CN115817818A - Air conditioning system capable of being independently adjusted by multiple cabins and control method thereof - Google Patents
Air conditioning system capable of being independently adjusted by multiple cabins and control method thereof Download PDFInfo
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- CN115817818A CN115817818A CN202211439847.0A CN202211439847A CN115817818A CN 115817818 A CN115817818 A CN 115817818A CN 202211439847 A CN202211439847 A CN 202211439847A CN 115817818 A CN115817818 A CN 115817818A
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Abstract
The invention belongs to a helicopter environment control system, and particularly provides an air conditioning system capable of independently adjusting multiple cabins and a control method thereof. Moreover, the system has good expansion capability, simple whole framework and centralized component parts, and can greatly save the space on the machine and reduce the weight requirement.
Description
Technical Field
The invention belongs to a helicopter environment control system, and particularly relates to a design of a helicopter air conditioning system.
Background
The invention relates to a helicopter air conditioning system architecture design, which meets the requirements of independent heating, refrigeration and ventilation of multiple cabins. The armed helicopter mainly adopts a longitudinal double-cabin design, such as Z10, apache and the like, and various transport helicopters can separate a cockpit from a cabin. Different thermal loads are arranged in different cabin sections, comfort evaluation of each person to the environment is also different, in order to realize independent control of multiple cabins, a helicopter air conditioning system at home and abroad always independently designs a heating system, a ventilation system and a refrigeration system of each cabin, so that the problems of complex system, large occupied space on the helicopter, high weight cost and the like are caused, and the requirements on dust prevention and poison prevention are also considered to be insufficient.
In the prior art, a patent CN201910981724.1 discloses a multi-cabin dual-system environment control system for a helicopter; in addition, a patent CN201910981721.8 discloses a helicopter multi-cabin dual-system air conditioning system based on a compressor middle air supply technology, and the patent is based on a helicopter multi-cabin dual-system environment control system, and the heating efficiency is improved through the compressor middle air supply technology; both the two patents utilize the heat pump/refrigeration dual-system principle of an evaporation circulation system, and need to utilize lubricating oil as a heat source, so that the lubricating oil is slow in temperature rise and long in heating time; particularly, in a low-temperature environment, when the temperature of the lubricating oil is low, heat is difficult to obtain; the design of the circulating pipeline has high requirement on the sealing performance, and once leakage occurs, the high-pressure refrigerant has the risk of entering a lubricating oil system, so that the flight safety is influenced. When the control system provided by the patent is in operation, the refrigeration cycle and the lubricating oil cycle are mutually coupled, the temperature and the pressure of fluid in the two cycles are mutually influenced, and the control method is complex.
Disclosure of Invention
In order to overcome the defects of the system, the invention provides an air conditioning system capable of independently regulating a plurality of cabins and a control method thereof. Moreover, the system has good expansion capability, simple whole framework and centralized component parts, and can greatly save the space on the machine and reduce the weight requirement.
The technical scheme is as follows: one aspect of the present invention provides an air conditioning system for independent adjustment of a plurality of compartments, the air conditioning system comprising: the system comprises an engine bleed air adjusting assembly, an evaporation cycle refrigerating device, an air source switching assembly, a fan, a plurality of sensors, a controller and an air distribution mechanism; the controller independently controls the working mode corresponding to each cabin section according to the requirement of each cabin section; when any cabin section works, the same engine air-entraining source, the evaporation cycle refrigerating device and the ambient air source are shared; the working modes corresponding to any cabin section at least comprise three working modes of ventilation, heating and refrigeration; in the ventilation mode, the fan sucks the air in the cabin and the air outside the cabin into the system, the mixing proportion of the air and the air is regulated by the air source switching assembly in the process of sucking the air into the system, and the regulated air is distributed to the cabin by the air distribution mechanism; the heating mode is based on the ventilation mode, adjusts the bleed air adjusting assembly of the engine by judging the air supply temperature entering the air distribution mechanism, introduces a certain amount of high-temperature bleed air of the engine, and raises the air supply temperature and distributes the air supply temperature to the cabin after mixing with the air sucked by the fan; the refrigeration mode is based on the ventilation mode, the evaporation circulation refrigeration device is adjusted by judging the air supply temperature entering the air distribution mechanism, the air sucked by the fan is cooled, the air supply temperature is reduced, and the air supply temperature is distributed to the cabin.
Furthermore, the engine bleed air adjusting assembly comprises an electric valve and an injection nozzle; when the electric heating cabin is in work, high-temperature high-pressure bleed air from an engine bleed air pipeline is uniformly distributed, and air sucked by the fan is mixed with the high-temperature bleed air by adjusting the opening of the electric valve, so that the heating requirement of each cabin section is met.
Furthermore, the air conditioning system also comprises a silencing and mixing component, and the silencing and mixing component is arranged at an engine bleed air nozzle; the method is used for reducing noise in the engine bleed air process.
Furthermore, the air source switching assembly can adopt an air source switching valve, so that the mixing ratio of air in the cabin and air outside the cabin can be adjusted, and one path of air source can be directly closed.
Further, the evaporation cycle refrigerating device comprises a compressor, a condenser, an expansion valve and an evaporator.
Furthermore, the air distribution mechanism comprises a quick-detachable air filter element structure, and different types of filter elements can be installed as required, so that dust-proof and anti-toxic filtering is realized.
Further, the controller comprises a temperature setting knob and a refrigeration switch, and when the refrigeration switch is turned off, the temperature setting knob is used for dividing ventilation and warming working modes and setting the target temperature of the air supply to the cabin in a correlated manner; when the refrigeration switch is turned on, the temperature setting knob is used to set the cabin temperature.
The invention also provides a control method of the air conditioning system capable of independently adjusting the multiple cabins, which comprises the following steps:
checking the states of the temperature setting knob and the refrigeration switch; when the refrigeration switch is turned off, the temperature setting knob is used for dividing ventilation and heating working modes and setting the target temperature of air supply to the cabin in a correlated manner; when the refrigeration switch is turned on, the temperature setting knob is used for setting the cabin temperature;
when the controller judges that the air conditioner is in a ventilation mode, the engine bleed air adjusting assembly and the evaporation cycle refrigerating device are closed, only the fan works, the fan sucks the air in the cabin and the air outside the cabin into the system, the mixing proportion of the air in the cabin and the air outside the cabin is adjusted through the air source switching assembly in the process of sucking the air into the system, and the adjusted air is distributed to the cabin through the air distribution mechanism;
when the controller judges that the heating mode is adopted, calculating and determining the air supply target temperature according to a linear mapping relation; the temperature collected by the air supply temperature sensor is close to the target air supply temperature by adjusting the opening of the electric valve, so that the heating in the cabin section is realized;
when the controller judges that the air source is in the refrigeration mode, firstly, the air source of the ambient air is cut off through the air source switching valve, the opening degree of an electronic expansion valve in the evaporation cycle refrigeration device is adjusted, the temperature at the outlet of the air source switching valve is compared with the temperature set by the temperature setting knob in real time, and the power of the evaporation cycle refrigeration device and the air volume of a fan are adjusted until the two temperature values are close to each other.
Further, a temperature relay is further arranged at an inlet of the air distribution mechanism, and when the air supply temperature relay detects that the air supply temperature exceeds a set threshold value, the electric valve is quickly closed, so that high-temperature gas is prevented from entering the cabin.
Furthermore, a temperature sensor arranged at the outlet of the air source switching valve can acquire the temperature of air from the outside of the cabin in real time, and recorded data can be used for analysis and investigation after a fault occurs.
The beneficial technical effects are as follows: on the configuration of a helicopter environmental control system, an evaporation cycle refrigeration system and an engine bleed air heating system are organically combined, and components in two independent systems are shared; for example, a fan, an air source switching valve, a sensor, an air distribution assembly, a filter and the like, so that the cost and the weight cost of the system are greatly reduced; meanwhile, the air conditioning system can be expanded into a plurality of air conditioning modules according to the helicopter configuration, so that independent adjustment of temperature control of multiple cabin sections is realized; when any cabin section works, the same engine air-entraining air source, the evaporation cycle refrigerating device and the ambient air source are shared; compared with the independently designed configuration of the traditional ventilation, heating and refrigeration system, the modular design of temperature adjustment in a single cabin segment has higher integration level, and greatly reduces the installation space and equipment cost of the system. The environment control system configuration provided by the invention can support individual requirements of multi-cabin environment regulation, for example, the requirement of refrigerating one cabin and heating the other cabin can be met without increasing additional cost. Compared with the existing multi-cabin environment control system of the helicopter, the multi-cabin environment control system of the helicopter introduces fresh air in the environment, utilizes the air-bleed air of the engine to adjust the temperature, adopts the temperature control system with an air path design, has high control linearity, and does not have the risk of control divergence.
Drawings
FIG. 1 is a block diagram of a temperature control system according to the present invention;
FIG. 2 is a schematic view of the air distribution mechanism;
the air distribution system comprises an air distribution assembly 1, an air supply temperature sensor 2, an air supply temperature relay 4, an injection nozzle 5, an electric valve 6, a fan 7, an evaporator 8, an air inlet temperature sensor 9, an air source switching valve 10, an electronic expansion valve 11, a refrigerant pipeline 12, an engine air guide pipeline 13, a refrigeration assembly 14, a fresh air pipeline 15, an air return pipeline 16, an air supply filter screen 17, a temperature setting knob 18 and a refrigeration switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An air conditioning system (as shown in figure 1) capable of being independently adjusted by multiple cabins is composed of an air distribution assembly 1, an air supply temperature sensor 2, an air supply temperature relay 3, an injection nozzle 4, an electric valve 5, a fan 6, an evaporator 7, an air inlet temperature sensor 8, an air source switching valve 9, an electronic expansion valve 10, a refrigerant pipeline 11, an engine air guide pipeline 12, a refrigeration assembly 13, a fresh air pipeline 14, an air return pipeline 15 and an air supply filter screen 16. The air conditioning implementation logic of each bay section is the same, and only one of the bay sections is used for illustration: the fan 6 is used as a power source for air circulation to work all the time, the air source switching valve 9 can select an air source entering a cabin through the position of the valve, and air from a cabin return air pipeline 15 or a fresh air pipeline 14 outside the cabin can be selected, so that the functions of 'internal ventilation' and 'external ventilation' are realized; the air distribution component 1 conveys the adjusted air supply to the cabin through a distribution pipeline, wherein an air supply filter screen 16 can be inserted, a common impurity filter screen is inserted during the conventional use, an anti-poison filter core is inserted in advance during the battle, and the air distribution component 1 and the air supply filter screen 16 jointly realize the filtering and distribution functions of the air supply; the air conditioning mainly comprises three modes of heating, refrigerating and ventilating: in the heating mode, the ejection nozzle 4 immediately ejects high-temperature bleed air from an engine bleed air pipeline 12 by adjusting the opening of the electric valve 5, and the high-temperature bleed air is mixed with air supplied by the fan 6 to realize heating; in the refrigeration mode, by adjusting the opening degree of the electronic expansion valve 10, the low-temperature refrigerant from the refrigeration assembly 13 exchanges heat with air supplied by the fan 6 in the evaporator 7, so that the refrigeration function is realized; when the electric valve 5 and the electronic expansion valve 10 are both closed, the system operates in a ventilation mode. The air conditioning mode of each cabin section can be selected according to the requirement, and the modes do not influence each other.
In one practical case, the engine bleed air adjusting assembly may include an injection nozzle 4 and an electric valve 5; when the device works, high-temperature and high-pressure bleed air from an engine bleed air pipeline is uniformly distributed, and air sucked by the fan 6 is mixed with the high-temperature bleed air by adjusting the opening of the electric valve 5, so that the heating requirement of each cabin section is met. A silencing and mixing component is designed at the position of an injection nozzle 4 for engine air entraining and is used for reducing noise in the engine air entraining process.
In addition, the air source switching assembly can adopt an air source switching valve 9, and the switching valve can adjust the mixing ratio of the air in the cabin and the air outside the cabin and can also directly close one path of air source.
During adjustment, the controller comprises a temperature setting knob and a refrigeration switch, and when the refrigeration switch is turned off, the temperature setting knob is used for dividing ventilation and heating working modes and setting the target temperature of air supply to the cabin in a correlated manner; when the refrigeration switch is turned on, the temperature setting knob is used to set the cabin temperature.
Referring to fig. 2, an air supply filter 16 is added to the air distribution module 1, and the filter includes a quick-release air filter cartridge structure, which can be loaded with different types of filter cartridges as required to achieve dust-proof and poison-proof filtering. Especially for some special application scenarios, the significance is great.
The main innovative design points of the temperature regulation system and the method provided by the invention are embodied in the following aspects:
1. uniformly distributing high-temperature and high-pressure bleed air from an engine bleed air pipeline 12, and mixing air sucked by a fan 6 with the high-temperature bleed air by adjusting the opening of an electric valve 5 to meet the heating requirement of each cabin section;
2. the low-temperature high-pressure refrigerant from the refrigeration component 13 is uniformly distributed, the flow of the refrigerant entering the evaporator 7 is controlled by adjusting the opening of the electronic expansion valve 10, the temperature of the air sucked by the fan 6 is reduced after the heat exchange with the evaporator 7, and the refrigeration requirement of each cabin section can be realized;
3. the fan 6 works in heating, refrigerating and ventilating modes, and the air quantity adjusting requirement of each cabin section can be met by setting the gear of the fan 6;
4. the air source switching valve 9 can switch air sources under heating, refrigerating and ventilating modes, can select cabin air from the return air pipeline 15 and can also select fresh air from the fresh air pipeline 14, and each cabin section can be independently adjusted according to requirements;
5. the air distribution component 1 can control the direction of outlet air, and comprises an upper air outlet, a lower air outlet or a demisting port, a filter element can be inserted into the air distribution component, a dustproof filter element can be inserted during conventional use, and a antivirus filter element can be inserted into the air distribution component under a battle environment;
6. the air conditioning modes of each cabin section are mutually independent, when the refrigeration switch 18 is in a closed state, the electronic expansion valve 10 is closed, the air conditioning in the corresponding cabin section is in a ventilation or heating mode, when the refrigeration switch 18 is in an open state, the electric valve 5 is closed, and the air conditioning in the corresponding cabin section is in a ventilation or refrigeration mode;
7. the injection nozzle 4 has an injection effect, and can inject part of air to be mixed if the fan 6 fails in a normal heating process, so that high-temperature gas is prevented from directly entering the air distribution assembly 1;
8. the refrigeration component 13 comprises a compressor and a condenser which are integrated together, so that modular replacement can be realized, and refrigerant pipelines are connected to different cabin sections when refrigeration is needed;
9. the evaporator 7 is designed to be in a detachable state, and after the evaporator 7, the electronic expansion valve 10, the refrigerant pipeline 11 and the refrigeration assembly 13 are detached, the ventilation and heating modes are not affected;
10. the temperature setting knob 17 is set to have a temperature range of 16-32 ℃, when the set temperature is 16-20 ℃, the electric valve 5 is closed, and the corresponding cabin section is in a ventilation mode for air conditioning; when the set temperature is 20-32 ℃, subtracting 60 ℃ from the set temperature value of 4 times to be used as the target temperature of gas supply; the opening degree of the electric valve 5 is adjusted to enable the temperature collected by the air supply temperature sensor 2 to be close to the air supply target temperature, so that the heating in the cabin section is realized; the higher the set temperature value is, the higher the air supply temperature is, and the lower the set temperature value is, the closer the air supply temperature is to the set temperature, so that the bleed air from the engine bleed air pipeline 12 is effectively saved while the heating requirement is met;
11. when the air supply temperature relay 3 detects that the air supply temperature exceeds 93 ℃, the electric valve 5 is quickly closed to prevent high-temperature air from entering the cabin;
12. the intake air temperature sensor 8 can collect the cabin air temperature from the return air pipeline 15 and the fresh air temperature from the fresh air pipeline 14, and the recorded data can be used for analysis and investigation after the fault occurs.
The air conditioning system capable of independently adjusting a plurality of cabins and the control method thereof provided by the invention have the advantages that the same air conditioning module is configured and formed for each cabin, and the high-temperature bleed air from an engine, the low-temperature refrigerant from a refrigeration unit and the fresh air from the outside are uniformly distributed as input, so that each cabin has independent air conditioning and filtering capabilities. Moreover, the system has good expansion capability, simple whole framework and centralized component parts, and can greatly save the space on the machine and reduce the weight requirement. Compared with the existing multi-cabin environment control system of the helicopter, the multi-cabin environment control system of the helicopter introduces fresh air in the environment, utilizes the air-bleed air of the engine to adjust the temperature, adopts the temperature control system with an air path design, has high control linearity, and does not have the risk of control divergence.
The foregoing is merely a detailed description of the embodiments of the present invention, and some of the conventional techniques are not detailed. The scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An air conditioning system for independent regulation of a plurality of compartments, said air conditioning system comprising: the system comprises an engine bleed air adjusting assembly, an evaporation cycle refrigerating device, an air source switching assembly, a fan, a plurality of sensors, a controller and an air distribution mechanism; the controller independently controls the working mode corresponding to each cabin section according to the requirement of each cabin section; when any cabin section works, the same engine air-entraining source, the evaporation cycle refrigerating device and the ambient air source are shared; the working modes corresponding to any cabin section at least comprise three working modes of ventilation, heating and refrigeration; in the ventilation mode, the fan sucks the air in the cabin and the air outside the cabin into the system, the mixing proportion of the air and the air is regulated by the air source switching assembly in the process of sucking the air into the system, and the regulated air is distributed to the cabin by the air distribution mechanism; the heating mode is based on the ventilation mode, adjusts the bleed air adjusting component of the engine by judging the air supply temperature entering the air distribution mechanism, introduces a certain amount of high-temperature bleed air of the engine, and raises the air supply temperature and distributes the air supply temperature to the cabin after mixing with the air sucked by the fan; the refrigeration mode is based on the ventilation mode, the evaporation circulation refrigeration device is adjusted by judging the air supply temperature entering the air distribution mechanism, the air sucked by the fan is cooled, the air supply temperature is reduced, and the air supply temperature is distributed to the cabin.
2. The air conditioning system for independent adjustment of multiple compartments as claimed in claim 1, wherein the engine bleed air adjustment assembly includes an electrically operated valve, an ejector nozzle; when the device works, high-temperature and high-pressure bleed air from an engine bleed air pipeline is uniformly distributed, and air sucked by a fan is mixed with the high-temperature bleed air by adjusting the opening of an electric valve, so that the heating requirement of each cabin section is met.
3. The air conditioning system for independent multi-compartment conditioning of claim 2 further comprising a muffling and mixing assembly disposed at an engine bleed air nozzle; the method is used for reducing noise in the engine bleed air process.
4. The air conditioning system for independent regulation of multiple cabins according to claim 1, wherein the air source switching component can adopt an air source switching valve, which can either regulate the mixing ratio of the air inside the cabin and the air outside the cabin or directly close one of the air sources.
5. The air conditioning system for independent multi-compartment conditioning of claim 1 wherein said evaporative cycle refrigeration means comprises a compressor, a condenser, an expansion valve, an evaporator.
6. The air conditioning system with independent conditioning for multiple compartments as claimed in claim 1, wherein said air distribution mechanism includes a quick release air filter cartridge arrangement that can be loaded with different types of filter cartridges as desired.
7. The air conditioning system for independent regulation of multiple compartments as claimed in claim 1, wherein said controller includes a temperature setting knob and a cooling switch, said temperature setting knob being used to divide the ventilating and warming operation modes and to set a target temperature of the air supply to the cabin in association when the cooling switch is turned off; when the refrigeration switch is turned on, the temperature setting knob is used to set the cabin temperature.
8. A control method for an air conditioning system capable of being independently adjusted by a plurality of cabins, the control method comprising the steps of:
checking the states of the temperature setting knob and the refrigeration switch; when the refrigeration switch is turned off, the temperature setting knob is used for dividing ventilation and heating working modes and setting the target temperature of air supply to the cabin in a correlated manner; when the refrigeration switch is turned on, the temperature setting knob is used for setting the cabin temperature;
when the controller judges that the air conditioner is in a ventilation mode, the engine bleed air adjusting assembly and the evaporation cycle refrigerating device are closed, only the fan works, the fan sucks the air in the cabin and the air outside the cabin into the system, the mixing proportion of the air in the cabin and the air outside the cabin is adjusted through the air source switching assembly in the process of sucking the air into the system, and the adjusted air is distributed to the cabin through the air distribution mechanism;
when the controller judges that the heating mode is adopted, calculating and determining the air supply target temperature according to a linear mapping relation; the temperature collected by the air supply temperature sensor is close to the target air supply temperature by adjusting the opening of the electric valve, so that the heating in the cabin section is realized;
when the controller judges that the air source is in the refrigerating mode, firstly, the air source of the ambient air is cut off through the air source switching valve, the opening degree of an electronic expansion valve in the evaporation cycle refrigerating device is adjusted, the temperature at the outlet of the air source switching valve is compared with the temperature set by the temperature setting knob in real time, and the power of the evaporation cycle refrigerating device and the air volume of a fan are adjusted until the two temperature values are close to each other.
9. The method as claimed in claim 8, wherein a temperature relay is further disposed at the inlet of the air distribution mechanism, and when the supply air temperature relay detects that the supply air temperature exceeds a set threshold, the electrically operated shutter is rapidly closed to prevent the high temperature gas from entering the cabin.
10. The method as claimed in claim 8, wherein the temperature sensor installed at the outlet of the switching valve of the wind source can also collect the temperature of the air from the outside of the cabin in real time, and the recorded data can be used for analysis and investigation after the fault occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211439847.0A CN115817818A (en) | 2022-11-17 | 2022-11-17 | Air conditioning system capable of being independently adjusted by multiple cabins and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211439847.0A CN115817818A (en) | 2022-11-17 | 2022-11-17 | Air conditioning system capable of being independently adjusted by multiple cabins and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115817818A true CN115817818A (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211439847.0A Pending CN115817818A (en) | 2022-11-17 | 2022-11-17 | Air conditioning system capable of being independently adjusted by multiple cabins and control method thereof |
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| CN (1) | CN115817818A (en) |
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- 2022-11-17 CN CN202211439847.0A patent/CN115817818A/en active Pending
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