Helicopter air conditioner control system

Abstract

The utility model belongs to the technical field of helicopter temperature control systems, and particularly relates to a helicopter air conditioner control system which comprises a temperature control box, a fan driving box and a temperature sensor. The temperature control box is provided with a display screen for displaying the working state of the system; the temperature sensor is arranged in the cabin and used for detecting the air supply temperature and feeding the air supply temperature back to the temperature control box. The temperature control box is used for adjusting the air speed of the evaporation fan, a selection toggle switch is arranged on the temperature control box to adjust the air speed of the evaporation fan, and the air speed of the evaporation fan comprises a high gear, a middle gear and a low gear; the fan driving box receives an instruction of the temperature control box and controls the working gear of the air suction fan.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of helicopter temperature control system, especially relates to a helicopter air conditioning control system. BACKGROUND

[0002] With the helicopter application field more and more widely, the cabin environment comfort degree requirement is higher and higher, and the control integration requirement of air conditioning system is also higher and higher. The air conditioning control system needs to monitor and display the working state and fault mode of the components in the use process, and then locates and solves the fault. The traditional helicopter air conditioning control system has two modes: one is that refrigeration and ventilation and heating are separately controlled, and there are respective control boxes. The other is that there is a separate control panel, but the control software and working mode and fault state display are integrated with the flight parameter system.

[0003] The first kind of separate control increases the complexity of system operation, and the man-machine efficiency is poor, and the space occupation and weight of the system are increased.

[0004] The second kind of separate control panel is integrated with the flight parameter system, and the operation is relatively simple, but the state monitoring and fault display interface of the system needs to share a display interface with other systems of the whole machine. The working mode, control temperature and other parameters need to be set, and the system state information needs to be manually searched to realize the air conditioning display page, so that the operation is complex, and the man-machine efficiency is poor. UTILITY MODEL CONTENT

[0005] The utility model discloses a helicopter air conditioning control system. The comprehensive control of the helicopter air conditioning system (including ventilation and heating system and evaporation circulation refrigeration system) can be realized, the comfortable environment in the cabin can be obtained, and the fault can be positioned conveniently.

[0006] Ventilation and heating: control the start and stop of the heating / ventilation system, feel the air supply temperature of the heating / ventilation system into the cabin, adjust the opening degree of the electric valve, change the cold and hot air mixing ratio, make the cabin air supply temperature reach the set value, prevent the air supply temperature from being too high, and avoid that high-temperature gas enters the cabin and injures personnel. Refrigeration: cooperate with the refrigeration electric control box of the evaporation circulation refrigeration system, control the start / stop, working mode and evaporation fan speed of the refrigeration system, and then control the temperature.

[0007] TECHNICAL SCHEME

[0008] A kind of helicopter air conditioning control system, comprising: temperature control box, fan drive box, temperature sensor;

[0009] The temperature control box has a display screen for displaying system working state;

[0010] The temperature sensor is arranged in the cabin for detecting the air supply temperature and feeding back to the temperature control box;

[0011] The temperature control box is used for adjusting the air volume of the evaporative fan, and a selection dial switch is arranged on the temperature control box to adjust the air volume of the evaporative fan, and the air volume of the evaporative fan includes three gears of high, medium and low;

[0012] The fan driving box receives the instruction of the temperature control box and controls the working gear of the air suction fan.

[0013] Further, the system further comprises a temperature relay arranged at the air outlet of the cabin air conditioner;

[0014] When the supply air temperature exceeds the first set value, the normally open contact of the temperature relay is closed, and the temperature control box receives the signal and closes the shutoff valve to cut off the supply air of the cabin; when the supply air temperature is lower than the second set value, the shutoff valve is opened.

[0015] Further, the temperature control box is further used for controlling the power supply state of the air suction fan, and when the temperature control box detects that the air suction fan driving box is abnormally powered off, the shutoff valve is automatically closed.

[0016] Further, the temperature control box is further connected with the helicopter power supply system;

[0017] When the temperature control box receives the valid signal of "emergency unloading" sent by the helicopter power supply system, the electrically operated valve is completely closed, the air suction fan is powered off, and the shutoff valve is powered off.

[0018] Further, the temperature control box is further connected with the engine electronic regulator, and when the temperature control box receives the signal of "engine prohibited bleed air" sent by the engine electronic regulator of the No. 1 and No. 3 engines, the shutoff valve is controlled to be closed, and the information of "No. 1 engine prohibited bleed air", "No. 3 engine prohibited bleed air" or "No. 1 and No. 3 engines prohibited bleed air" is displayed on the display screen of the temperature control box, and the information is stored.

[0019] Further, when the temperature control box receives the overpressure alarm signal sent by the refrigeration electric control box assembly, the temperature control box controls the compressor and the condenser fan to stop working; after the overpressure alarm signal disappears, the working state before the overpressure protection is automatically restored.

[0020] In summary, the beneficial effects of the utility model are as follows:

[0021] The utility model provides a kind of helicopter air conditioner control system, can realize the comprehensive control to helicopter air conditioner system (including ventilation heating system and evaporative circulation refrigeration system), make cabin obtain comfortable environment simultaneously and can be positioned fault conveniently again.There is the characteristics such as simple and clear logic, strong applicability.

[0022] 1. The utility model discloses a helicopter ventilation and heating system and evaporative circulation refrigeration system provide a kind of comprehensive control method, make cabin obtain comfortable environment while again conveniently locate fault.

[0023] 2.The control system of the utility model has the functions of over-temperature protection, engine prohibition of bleed air, emergency unloading and refrigeration fault protection, which provides comprehensive protection for the safety of the system and the helicopter. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The schematic diagram of the air conditioning control system is shown in the figure.

[0025] Figure 2 The panel diagram of the temperature control box is shown in the figure. DETAILED DESCRIPTION

[0026] To better understand the present application by those skilled in the art, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor shall fall within the scope of protection of the present application.

[0027] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0028] In addition, the terms "mount", "set", "provided with", "connect", "connect", "socket" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] A helicopter air conditioning control system comprises a temperature control box, a fan drive box, a temperature sensor and a temperature relay.

[0030] The temperature control box has a display screen, which can display the working mode, return air temperature, evaporative fan air speed, set temperature, suction fan working state, suction fan air speed, shutoff valve on / off state, electric damper position (full off / full on), supply air temperature, and fault name.

[0031] The display screen has a brightness adjustment function.

[0032] The working mode has five modes: internal circulation, ventilation, heating, refrigeration, and stop.

[0033] The ventilation mode is to turn the working mode selection knob on the temperature control box to the "ventilation" position, control the suction fan air volume to level 1, and display "suction fan working" on the display screen.

[0034] The internal circulation mode is to turn the working mode selection knob on the temperature control box to the "internal circulation" position, output a signal to the refrigeration control box, and control the evaporative fan to work.

[0035] The heating mode is to turn the working mode selection knob on the temperature control box to the "manual heating" or "automatic heating" position, control the suction fan air volume to level 2, display "suction fan working" and "suction fan low speed" on the display screen, and turn on the shutoff valve.

[0036] The manual heating mode is to turn the working mode selection knob on the temperature control box to the "manual heating" position, and control the opening of the electric damper by pressing "+" and "-" (the automatic gear is no longer effective at this time). "+" and "-" represent "temperature rise" and "temperature drop", respectively. When the hand is released, it automatically returns to the "temperature preservation" position.

[0037] The automatic heating mode is to turn the working mode selection knob on the temperature control box to the "automatic heating" position. When there is a difference between the mixed air temperature measured by the temperature sensor and the temperature given by the temperature control box, the temperature control box outputs a control signal to control the opening and closing of the electric damper.

[0038] The refrigeration mode is to turn the working mode selection knob on the temperature control box to the "refrigeration" position, output a signal to the refrigeration control box, and control the evaporative fan, compressor, and condenser to work. In the refrigeration state, there are three sub-working modes: refrigeration, refrigeration standby, and defrosting.

[0039] The refrigeration sub-mode is entered when the return air temperature sensor temperature is ≥ set temperature + 2℃ and the defrosting temperature sensor temperature is > 3℃. At this time, the evaporative fan, condensing fan, and compressor work.

[0040] The refrigeration standby is entered into a refrigeration standby sub-mode when the temperature of the return air temperature sensor is less than or equal to the set temperature minus 2℃ and the temperature of the defrost temperature sensor is greater than 3℃, and only the evaporative fan works, and the condensing fan and the compressor do not work.

[0041] The defrost sub-mode is entered into a defrost sub-mode when the temperature of the return air temperature sensor is greater than or equal to the set temperature plus 2℃ and the temperature of the defrost temperature sensor is less than or equal to 1℃, and only the evaporative fan works, and the condensing fan and the compressor do not work.

[0042] The stop mode is that the working mode selection knob on the temperature control box is turned to the "stop" position, and the air conditioning system is on standby.

[0043] The temperature setting is that the temperature value is set through a button, and in the automatic heating mode, the temperature setting range is 30-60℃, and every 10℃ is one step; in the refrigeration mode, the temperature setting range is 15-32℃, and every 1℃ is one step.

[0044] The temperature control box has an evaporative fan speed regulation function, and a selection dial switch is arranged on the temperature control box, and the evaporative fan speed is adjustable in three steps of high, medium and low.

[0045] The fan drive box has the function of receiving the instructions of the temperature control box and controlling the working gear of the suction fan.

[0046] The temperature relay has the function of detecting whether the supply air temperature is over-temperature. In the heating mode, when the temperature relay detects that the supply air temperature of the ventilation / heating system exceeds 93℃, the normally open contact of the temperature relay is closed, and the temperature control box receives this signal and turns off the valve to perform the closing action until the supply air temperature is below 75℃; if the supply air temperature is still higher than 85℃ after 10S, the automatic closing valve is automatically closed, the fault light flashes, and an over-temperature fault is reported to avoid high-temperature gas entering the cabin and injuring personnel.

[0047] The temperature sensor has the function of detecting the supply air temperature value during heating and feeding back to the temperature control box.

[0048] The control system has the function of abnormal power-off protection of the suction fan drive, and when the temperature control box detects that the suction fan drive box abnormally powers off, the automatic closing valve is automatically closed.

[0049] The control system has an emergency unloading function, and when the temperature control box receives an "emergency unloading" valid signal from the helicopter power supply system, the electrically operated valve is completely closed, the suction fan is powered off, and the automatic closing valve is powered off.

[0050] The control system has engine air bleed protection function, when the temperature control box receives the signal of "engine air bleed" sent by the engine electric governor of No.1 and No.3 engine, it immediately sends the command to the air bleed valve of the corresponding engine to make the valve immediately execute the action of closing the air bleed. At the same time, the display screen of the temperature control box displays the information of "No.1 engine air bleed", "No.3 engine air bleed", or "No.1 and No.3 engine air bleed", and has the function of storing the information.

[0051] The control system has refrigeration fault protection function, when the temperature control box receives the short circuit / circuit fault alarm signal sent by the refrigeration electric control box, it automatically converts the working mode of the refrigeration system to standby state, the fault protection cannot be automatically removed, and only when the fault alarm signal disappears, the fault protection is removed. When the temperature control box receives the overpressure alarm signal sent by the refrigeration electric control box, it controls the compressor and condensing fan to stop working; after the overpressure alarm signal disappears, it automatically restores to the working state before the overpressure protection.

[0052] The control system has the function of recording the fault name.

[0053] The above only describes the preferred embodiments of the present application and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A helicopter air conditioning control system, characterized by: The system comprises: a temperature control box, a fan driving box, and a temperature sensor; the temperature control box is provided with a display screen for displaying the working state of the system; the temperature sensor is arranged in the cabin for detecting the temperature of the air supply and feeding back to the temperature control box; the temperature control box is used for adjusting the air speed of the evaporative fan, and a selection dial switch is arranged on the temperature control box for adjusting the air speed of the evaporative fan, which includes three gears of high, medium and low; the fan driving box receives the instruction from the temperature control box to control the working gear of the air suction fan.

2. The system of claim 1, wherein: The system further comprises a temperature relay arranged at the air outlet of the air conditioner in the cabin; when the temperature of the air supply exceeds the first set value, the normally open contact of the temperature relay is closed, and the temperature control box receives the signal to close the shutoff valve to cut off the air supply to the cabin; when the temperature of the air supply is lower than the second set value, the shutoff valve is opened.

3. The system of claim 2, wherein: The temperature control box is also used for controlling the power supply state of the air suction fan, and when the temperature control box detects that the air suction fan driving box is abnormally powered off, the shutoff valve is automatically closed.

4. The system of claim 3, wherein: The temperature control box is also connected with the power supply system of the helicopter; when the temperature control box receives the valid signal of "emergency unloading" sent by the power supply system of the helicopter, the electrically operated valve is completely closed, the air suction fan is powered off, and the shutoff valve is powered off.

5. The system of claim 4, wherein: The temperature control box is also connected with the electronic regulator of the engine, and when the temperature control box receives the signal of "engine prohibited bleed air" sent by the electronic regulator of the No. 1 and No. 3 engines, the shutoff valve is closed, and the information of "No. 1 engine prohibited bleed air", "No. 3 engine prohibited bleed air", or "No. 1 and No. 3 engines prohibited bleed air" is displayed on the display screen of the temperature control box, and the information is stored.

6. The system of claim 5, wherein: When the temperature control box receives the overpressure warning signal sent by the refrigeration electric control box assembly, the temperature control box controls the compressor and the condensing fan to stop working; after the overpressure warning signal disappears, the working state before the overpressure protection is automatically restored.

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