JPS5941437B2 - In-flight air conditioning system in aircraft - Google Patents

Description

[Detailed description of the invention] The present invention relates to an air conditioning system inside an aircraft.

Conventionally, air conditioning in an aircraft has been done regardless of whether there are many passengers or crew members on board.

Therefore, the same ventilation was always performed when there were few passengers as when the seats were full.

As a result, an excessive amount of extracted air is wasted for in-flight air conditioning.
In reality, there is no way to avoid the negative effects of wasting fuel costs.

This invention improves the conventional air conditioning system described above, and controls the supply of bleed air to the air conditioning system by using at least a signal corresponding to the number of passengers.
This is done using a signal corresponding to the amount of air supplied necessary for pre-pressure inside the machine and a signal corresponding to the extraction pressure.

FIG. 1 is a system diagram of an in-flight air conditioner according to the present invention, and numeral 1 on the right side indicates an in-flight room such as a cabin and a cockpit of an aircraft.

Conditioned air is supplied into this chamber 1 from the left via a piping 11 as shown by a solid line via a flow rate control valve 2 and an air conditioner 3.

The flow control valve 2 is operated by the controller 4 via the actuator 5 to adjust the flow rate of air to the air conditioner 3.

The controller 4 has a signal 6 corresponding to the number of passengers and crew members, a signal 7 corresponding to the cabin heat load including the interior of the cabin 1, and a signal 7 corresponding to the heat load inside the cabin 1, as shown by the dotted line circuit from the cabin 1 on the right side. A signal 8 corresponding to the required air flow rate required for preloading is input.

Also, as shown by the dotted line circuit, a signal 9 corresponding to the inlet pressure of air entering the flow control valve 2 and a signal 10 corresponding to the population temperature are input.

Based on each of these input signals, the controller 4 operates the actuator 5 to operate the flow control valve 2, so that a controlled amount of air is sent to the air conditioning mechanism 3.

Such a configuration is a feature of the present invention.

FIG. 2 shows a specific embodiment of this invention.

The piping indicated by reference numeral 11 on the right is for guiding high-temperature, high-pressure air from the engine into the air conditioning mechanisms 3, 3, and supplying it into the interior of the cabin 1 at the left end of the figure.

In the illustrated example, two air conditioning mechanisms are provided.

In the figure, reference numeral 13 denotes a temperature detector which detects the temperature of the air passing through the pipe 11, converts it into an electrical signal, and inputs this to the controller 4.

A pressure detector 12 similarly detects the pressure of the air in the pipe 11, converts it into a control electric signal, and inputs it to the controller 4.

The piping 11 includes a flow control valve 2, a primary heat exchanger 14, a cooling turbine 15, a secondary heat exchanger 16, and a dehumidifier 1.
The first prize is placed in this order.

The controller 4 includes various control signal setting devices in the room 1, as shown in the lower left part of FIG.

That is, 18 is a setting device that outputs a signal corresponding to the number of passengers, 19 is a setting device that outputs a signal corresponding to the temperature in the room, and 20 is a signal corresponding to the air flow rate required for prepressure in the room 1. This is a setting device that outputs .

Signals set by these setting devices are also sent to the controller 4.

The controller 4 has a comparison circuit that compares each signal from the passenger number signal setter 18, the heat load signal setter 19, and the preload tank required air flow rate setter 20, and as a result of comparing these signals,
For the signal that gives the largest air flow rate, pressure detector 1
2. Combining the signals from the temperature sensor 13, the flow rate control valve 2
An output signal for controlling the opening degree of the actuator 5 is sent to the actuator 5.

The actuator 5 includes a mechanism that opens the flow control valve to a required opening degree in response to this output signal.

As the mechanism, a hydraulic or pneumatic servo mechanism, an electromagnetic type, etc. are used.

Further, the signal sent to the controller 4 may be either a digital signal or an analog signal.

The high-temperature, high-pressure air thus supplied from the engine is controlled to the required flow rate at the time by the flow control valve 2 according to the present invention, and is sent to the primary heat exchanger 14, where it is first passed through the cooling turbine 15. Thereafter, it is further sent to a second heat exchanger 16, where the pressure is adjusted and cooled, and then passed through a dehumidifier 17 and the like, and then supplied into the interior of the machine 1.

As a result, the inside of the room 1 is air-conditioned.

If the flow rate required for the number of passengers at that time is smaller than the flow rate required for preload, the controller 4 selects the larger of the two remaining required flow rates, that is, the flow rate required for preload and the flow rate required for heat load. The opening of the flow control valve is controlled in response to the flow rate signal from the other side.

In short, three signals6. The opening degree of the flow rate control valve 2 is determined in response to the signal that gives the maximum flow rate among γ, 8 (FIG. 1), and appropriately conditioned air is always obtained in the chamber 1.

By the way, in the case of this invention, the extraction air temperature detection, its output signal, and the signal corresponding to the heat load inside the machine have been explained as the control signals of the controller 4, but these are not essential conditions, and therefore, the device does not require these conditions. This invention also includes.

In the figure, 21 is a water separator, 22 is a butterfly valve, 2
3 is a check valve, 24 is a temperature sensor, and 25 is a mixing chamber.

As it operates as described above, even if the seats are not full of passengers, excessive ventilation will not occur as in the case of full seats.

Therefore, there is an advantage that fuel costs are not wasted for air-conditioning the cabin.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an air conditioner according to this explanation, and FIG. 2 is a diagram showing one specific embodiment thereof. 1... In-flight room, 2... Flow rate control valve, 3
...Air conditioning mechanism, 4...Controller, 5...
... Actuator, 6 ... Signal corresponding to the number of passengers, 8 ... Signal corresponding to the flow rate of the preload reservoir, 12 ... Pressure detector, 13 ... ... Temperature detector, 18 ... Signal setting device corresponding to the number of passengers, 19 ... Signal setting device corresponding to the heat load, 2
0... Required air flow rate setting device for preload reservoir.

Claims (1)

[Claims] 1. In a device that supplies air extracted from the engine to the aircraft cabin via an air conditioning mechanism that adjusts its temperature and pressure, the amount of air flowing into the air conditioning mechanism is controlled based on the number of people on the aircraft, the required preload flow value in the cabin, and the engine. An in-flight air conditioning system for an aircraft, characterized in that air conditioning is performed based on a value that provides a maximum air flow rate among pressure values of air that is bled and supplied.