Pulse type oxygen supply device and aircraft

Abstract

The invention provides a pulse type oxygen supply device and an aircraft. The pulse type oxygen supply device comprises a controller, an oxygen supply pressure sensor, a passenger cabin pressure sensor and a plurality of mask assemblies. Each mask assembly comprises a mask, a pressure switch and an electromagnetic valve; a breathing pipeline of the mask is connected with an air source of the aircraft, an electromagnetic valve for controlling on-off is arranged on the breathing pipeline, and a pressure switch is further arranged on the breathing pipeline; the electromagnetic valve and the pressure switch are both connected with the controller; the controller is further connected with the passenger cabin pressure sensor and the oxygen supply pressure sensor. The pressure switch is used for detecting pressure in the mask pipeline, and when the pressure is lower than preset pressure, an oxygen supply demand instruction is sent to the controller; the controller is used for generating an opening instruction of the electromagnetic valve corresponding to the pressure switch according to detection values of the passenger cabin pressure sensor and the oxygen supply pressure sensor when an oxygen supply demand instruction sent by any pressure switch is detected, and the opening instruction comprises the opening duration of the electromagnetic valve. Respiration demand feedback is added into oxygen supply time regulation, and oxygen supply demand changes are met by controlling the opening and closing time of the electromagnetic valve according to different height requirements.

Description

Technical Field

[0001] The invention relates to the field of aviation oxygen supply, and in particular to a pulse oxygen supply device and an aircraft. Background Art

[0002] Currently, most aviation oxygen systems use open-type continuous oxygen supply, which is not suitable for large groups of people to use at the same time.

[0003] The demand for oxygen supply is relatively large, especially for the emergency oxygen system for passengers on civil aircraft. The oxygen-generating equipment required for open oxygen supply is large in size and has poor economic efficiency. Summary of the invention

[0004] The present invention provides a pulse oxygen supply device and an aircraft, which adopt a pulse oxygen supply mode to control oxygen supply according to breathing demand and altitude change feedback, thereby saving oxygen supply demand and improving product economy.

[0005] The present invention provides a pulse oxygen supply device, comprising: a controller, an oxygen supply pressure sensor, a cabin pressure sensor and a plurality of mask assemblies;

[0006] Each mask assembly includes: a mask, a pressure switch, and a solenoid valve; the breathing tube of the mask is connected to the air source of the aircraft, a solenoid valve for controlling on and off is provided on the breathing tube, and a pressure switch is also provided on the breathing tube; the solenoid valve and the pressure switch are both connected to the controller;

[0007] The controller is also connected to the cabin pressure sensor and the oxygen supply pressure sensor;

[0008] The pressure switch is used to detect the pressure in the mask pipeline. When the pressure is lower than the preset pressure, it sends an oxygen supply demand instruction to the controller;

[0009] The controller is used to generate an opening instruction for the solenoid valve corresponding to the pressure switch according to the detection values ​​of the cabin pressure sensor and the oxygen supply pressure sensor when an oxygen supply demand instruction sent by any pressure switch is detected, and the opening instruction includes the opening duration of the solenoid valve.

[0010] Optionally, the controller is specifically used to query a preset corresponding table according to the detection values ​​of the cabin pressure sensor and the oxygen supply pressure sensor, and determine the opening time and opening instruction of the solenoid valve corresponding to the pressure switch.

[0011] Optionally, the smaller the detection value of the cabin pressure sensor is, the higher the cabin altitude is, and the longer the opening time of the corresponding solenoid valve is.

[0012] Optionally, the larger the detection value of the oxygen supply pressure sensor is, the shorter the opening time of the corresponding solenoid valve is.

[0013] Optionally, the mask assembly further includes: a flow indicator light; the solenoid valve is also connected to the flow indicator light;

[0014] When the solenoid valve is opened, the flow indicator light circuit is connected, and the flow indicator light is on, indicating oxygen supply.

[0015] Optionally, the preset pressure is -5Kpa.

[0016] Optionally, the mask assembly further comprises: a fault indicator light;

[0017] Fault indicator light, which indicates the fault mode by flashing;

[0018] Failure modes include mask jettison failure.

[0019] The present invention provides an aircraft, characterized in that it adopts the pulse oxygen supply device as described in any one of the above.

[0020] The present invention provides a pulse oxygen supply device and an aircraft, which add respiratory demand feedback to the oxygen supply time adjustment, and change the oxygen supply demand according to different altitude requirements, and meet the oxygen supply function requirements by controlling the opening and closing time of the electromagnetic valve. By adding oxygen supply demand feedback and altitude change requirements, the oxygen supply demand data obtained under comprehensive factors in the experiment are formed into a demand library, so that the on-off time of the electromagnetic valve is set in the control software to meet the pulse oxygen supply requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a simplified diagram of the passenger emergency oxygen unit controller;

[0023] Figure 2 This is a schematic diagram of a simulation system for valve components that takes into account the influence of airtight force. DETAILED DESCRIPTION

[0024] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. The following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0025] The pulse oxygen supply device and the aircraft provided by the present invention are explained below with reference to the accompanying drawings.

[0026] like Figure 1-2As shown, the present invention provides a pulse oxygen supply device, comprising: a controller, an oxygen supply pressure sensor, a cabin pressure sensor and a plurality of mask assemblies;

[0027] Each mask assembly includes: a mask, a pressure switch, and a solenoid valve; the breathing tube of the mask is connected to the air source of the aircraft, a solenoid valve for controlling on and off is provided on the breathing tube, and a pressure switch is also provided on the breathing tube; the solenoid valve and the pressure switch are both connected to the controller;

[0028] The controller is also connected to the cabin pressure sensor and the oxygen supply pressure sensor;

[0029] The pressure switch is used to detect the pressure in the mask pipeline. When the pressure is lower than the preset pressure, it sends an oxygen supply demand instruction to the controller;

[0030] The controller is used to generate an opening instruction for the solenoid valve corresponding to the pressure switch according to the detection values ​​of the cabin pressure sensor and the oxygen supply pressure sensor when an oxygen supply demand instruction sent by any pressure switch is detected, and the opening instruction includes the opening duration of the solenoid valve.

[0031] The pulse oxygen supply device is the control unit of each passenger emergency oxygen module. It is installed on the passenger emergency oxygen unit and can intelligently control each actuator. When the cabin altitude reaches the critical condition or receives the host command, it controls the latch mechanism to move and release the mask. The altitude switch critical signal is provided by the front-end device. When the pressure switch senses the pressure change in the oxygen supply pipeline (downstream of the control valve) caused by the passenger's breathing, it generates an oxygen supply instruction. The oxygen supply instruction is sent to the controller. According to the oxygen supply instruction, the controller can intermittently open / close the corresponding breathing control valve according to the different cabin altitudes and the different front-end oxygen supply pressures, and provide the mask with the corresponding oxygen supply in the form of pulse oxygen supply. When working normally, a single oxygen supply device can meet the supply of 4 passengers.

[0032] The working process of the pulse oxygen supply device is as follows: First, the onboard 28VDC power supply is isolated by the electronic controller isolation power supply and converted into the voltage required by each unit to power the electronic control device. In the working state, the electronic control CPU establishes communication with the onboard computer through the interface unit, obtains the jettisoning signal and sends relevant information to the control module; the cabin pressure sensor collects the altitude signal, inputs it into the electronic control system signal conditioning unit for signal processing, and the processed signal is input into the electronic control system central processing unit (CPU) after analog-to-digital conversion (A / D); then, according to the acquired altitude signal, according to the flow value of the altitude / flow correspondence relationship, according to the oxygen flow requirements at different altitudes, at the same time, the oxygen supply pressure sensor senses the change in the demand pressure of the oxygen supply pipeline, forms an oxygen supply demand signal, and opens the intake solenoid valve through the output drive unit to deflate the oxygen supply pipeline. In this way, the pressure sensor signal is controlled by the electronic control system and the control solenoid valve in a closed loop to achieve the control of the oxygen output flow at a given altitude. The corresponding information is transmitted to the aircraft through the serial communication method, and the requirements are decomposed. The functional requirements are as follows.

[0033] In addition, the pulse oxygen supply device functions include the following indication functions: 1) indicating the oxygen supply status of each cabin member; 2) a fault indication signal light, which indicates the fault mode by flashing.

[0034] The functions of the pulse oxygen supply device include communication functions: 1) Feedback the status of the passenger oxygen mask jettisoning to the aircraft; 2) Provide the passenger oxygen mask jettisoning alarm to the aircraft; 3) Provide the mask jettisoning fault information to the onboard maintenance system cabinet; 4) Receive the signal from the remote data collector, perform BIT self-test, and then feed back the result to the remote data collector. 5) Assembly debugging function, which can read the internal data externally.

[0035] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A pulse oxygen supply device, characterized in that: include: controller, oxygen supply pressure sensor, cabin pressure sensor, and multiple mask assemblies; Each mask assembly includes: a mask, a pressure switch, and a solenoid valve; The breathing tube of the mask is connected to the air source of the aircraft, and a solenoid valve for controlling on and off is arranged on the breathing tube, and a pressure switch is also arranged on the breathing tube; the solenoid valve and the pressure switch are both connected to the controller; The controller is also connected to the cabin pressure sensor and the oxygen supply pressure sensor; The pressure switch is used to detect the pressure in the mask pipeline. When the pressure is lower than the preset pressure, it sends an oxygen supply demand instruction to the controller; The controller is used to generate an opening instruction for the solenoid valve corresponding to the pressure switch according to the detection values ​​of the cabin pressure sensor and the oxygen supply pressure sensor when an oxygen supply demand instruction sent by any pressure switch is detected, and the opening instruction includes the opening duration of the solenoid valve.

2. The pulse oxygen supply device according to claim 1, characterized in that: The controller is specifically used to query a preset corresponding table according to the detection values ​​of the cabin pressure sensor and the oxygen supply pressure sensor, determine the opening time and opening instruction of the solenoid valve corresponding to the pressure switch.

3. The pulse oxygen supply device according to claim 1, characterized in that: The smaller the detection value of the cabin pressure sensor is, the higher the cabin altitude is, and the longer the corresponding solenoid valve is opened.

4. The pulse oxygen supply device according to claim 1, characterized in that: The larger the detection value of the oxygen supply pressure sensor is, the shorter the opening time of the corresponding solenoid valve is.

5. The pulse oxygen supply device according to claim 1, characterized in that: The mask assembly also includes: a flow indicator light; the solenoid valve is also connected to the flow indicator light; When the solenoid valve is opened, the flow indicator light circuit is connected, and the flow indicator light is on, indicating oxygen supply.

6. The pulse oxygen supply device according to claim 1, characterized in that: The preset pressure is -5Kpa.

7. The pulse oxygen supply device according to claim 1, characterized in that: The mask assembly also includes: a fault indicator light; Fault indicator light, which indicates the fault mode by flashing; Failure modes include mask jettison failure.

8. An aircraft, characterized in that: A pulse oxygen supply device as described in any one of claims 1 to 7 is used.

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