JPH06312698A - Air conditioner - Google Patents

Abstract

PURPOSE:To reduce the weight of the airframe and the manufacturing cost of the airframe by reducing the number of air conditioners to be loaded by disposing a bearing abnormality detecting sensor in a bearing of an air cycle machine to which bleed air from an engine is supplied through a flow control valve, and controlling the flow control valve by inputting a signal from the sensor. CONSTITUTION:In an air conditioner where bleed air from an engine is supplied to an air cycle machine through a flow control valve 5 and passed through a heat exchanger 6 to be heat-exchanged and discharged to a cabin, a controller 4 is put in the connecting state between a temperature sensor 3 for detecting the abnormality of a bearing, which is disposed in a bearing 2 of the air cycle machine 1 and the flow control valve 5. During the operation of the air conditioner, the temperature of the bearing 2 is always detected by the temperature sensor 3 and input to the controller 4. When the temperature of the bearing 2 exceeds a normal value, the bleed air flow is throttled by the flow control valve 5 to decrease the rotating speed of the air cycle machine 1, so that load is reduced so as to avoid damage of the bearing 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner applied to an aircraft or the like.

[0002]

2. Description of the Related Art In civilian airliners, in order to maintain regular arrivals and departures, a system that can be operated even if there is a slight failure has been adopted.

In a conventional air conditioner mounted on an aircraft, an air conditioner provided with an air cycle machine 1, a flow rate control valve 5 and a heat exchanger 6 as shown in FIG. It was supposed that two or more packages could be installed to provide redundancy so that even if one air conditioner package fails, the other air conditioner package can maintain the air conditioning function.

[0004]

In a conventional aircraft, a plurality of air conditioner packages are mounted in order to provide redundancy, but this causes an increase in the weight of the entire body and an increase in cost. Was there. The present invention is intended to solve the above problems.

[0005]

An air conditioner according to the present invention is an air conditioner equipped with an air cycle machine in which bleed air from an engine is supplied through a flow control valve, and the air conditioner is provided in a bearing of the air cycle machine. And a controller for controlling the flow control valve by inputting a signal from the sensor.

[0006]

In the above, the bearing of the air cycle machine is
When an abnormality occurs, generally the temperature becomes high and the vibration becomes high.

Therefore, in the present invention, the bearing abnormality detection sensor constantly monitors temperature, vibration, etc. and inputs them to the controller, and the controller detects the flow rate when the detected value of the sensor becomes higher than the normal value. The control valve is controlled to reduce the pressure or flow rate of bleed air flowing into the air cycle machine, reduce the number of revolutions of the air cycle machine, reduce its load, and avoid bearing damage.

As described above, an air conditioner mounted on an aircraft or the like for increasing redundancy is unnecessary, and the number of mounted air conditioners can be reduced, so that the weight of the airframe and the manufacturing cost of the airframe can be reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. The embodiment shown in FIG. 1 is an air conditioner in which bleed air from an engine is supplied to an air cycle machine through a flow rate control valve 5, passes through a heat exchanger 6, is heat-exchanged, and is discharged to a cabin. A temperature sensor 3 provided on the bearing 2 of the air cycle machine 1 for detecting a bearing abnormality,
Also, a controller 4 connected between the temperature sensor 3 and the flow control valve 5 is provided.

In the above, during operation of the air conditioner, the air cycle machine 1 is driven, and the temperature of the bearing 2 thereof is constantly detected by the temperature sensor 3 and input to the controller 4.

When the temperature of the bearing 2 exceeds the normal value, the controller 4 sends a signal to the flow control valve 5,
The flow rate of bleed air flowing into the air cycle machine 1 is reduced, the rotation speed of the air cycle machine 1 is reduced, the load of the air cycle machine 1 is reduced, and damage to the bearing 2 is avoided.

With respect to the above, it is the bearing 2 of the air cycle machine 1 that is relatively unreliable in the air conditioner package, and most damages can be prevented by preventing damage to the bearing 2. is there. Further, if an abnormality occurs in the bearing 2, its temperature rises or vibration occurs, and by detecting them, catastrophic damage to the device can be prevented.

As described above, an air conditioner mounted on an aircraft or the like is not necessary to increase redundancy, and the number of mounted air conditioners can be reduced, so that the weight of the airframe and the manufacturing cost of the airframe can be reduced.

In order to prevent damage to the bearing, a vibration sensor is provided in the bearing to constantly detect vibration, and when the vibration level exceeds a normal value, the controller causes the bleed air to flow into the air cycle machine. It is also possible to suppress it.

[0015]

The air conditioner of the present invention is an air conditioner equipped with an air cycle machine in which bleed air from an engine is supplied through a flow control valve, and a bearing abnormality provided in a bearing of the air cycle machine. A detection sensor,
By providing a controller that inputs a signal from the sensor to control the flow control valve, an air conditioner mounted on an aircraft or the like is not required to increase redundancy, and the number of mounted air conditioners can be reduced. Therefore, the weight of the machine body and the manufacturing cost of the machine body can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an air conditioner according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a conventional air conditioner.

[Explanation of symbols] 1 Air cycle machine 2 Bearing 3 Temperature sensor 4 Controller 5 Flow control valve 6 Heat exchanger

Claims (1)

[Claims] 1. An air conditioner equipped with an air cycle machine in which bleed air from an engine is supplied through a flow control valve, and a bearing abnormality detection sensor disposed in a bearing of the air cycle machine, and An air conditioner comprising a controller that inputs a signal to control the flow control valve.