Pulse type oxygen supply device

Abstract

The utility model provides a pulse type oxygen supply device which 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 utility model relates to the field of aviation oxygen supply, in particular to a pulse oxygen supply device. 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 airliners. The oxygen-generating equipment required for open oxygen supply is large in size and less economical. Utility Model Content

[0004] The utility model provides a pulse oxygen supply device, which adopts a pulse oxygen supply mode and controls the oxygen supply according to the respiratory demand and altitude change feedback, thereby saving the oxygen supply demand and improving the economic efficiency of the product.

[0005] The utility model 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 mask's breathing tube is connected to the aircraft's air source, and the breathing tube is provided with a solenoid valve for controlling on and off, and a pressure switch; the solenoid valve and pressure switch are both connected to the controller;

[0007] The controller is also connected to the cabin pressure sensor and 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, when detecting an oxygen supply demand instruction sent by any pressure switch, generate an opening instruction for the solenoid valve corresponding to the pressure switch based on the detection values ​​of the cabin pressure sensor and the oxygen supply pressure sensor, 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 based on 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 corresponding opening time of the solenoid valve is longer.

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

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

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

[0018] Failure modes include mask ejection failure.

[0019] The utility model provides a pulse oxygen supply device, which adds respiratory demand feedback to the oxygen supply time adjustment, and changes the oxygen supply demand according to different altitude requirements. By controlling the opening and closing time of the solenoid valve, the oxygen supply function requirements are met. By adding oxygen supply demand feedback and altitude change requirements, the oxygen supply demand data obtained under comprehensive factors in the experiment are combined to form a demand library, so that the solenoid valve on-off time can be set in the control software to meet the pulse oxygen supply requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to 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 any creative labor.

[0021] Figure 1 This is a simplified diagram of the passenger emergency oxygen unit controller;

[0022] Figure 2 This is a schematic diagram of a simulation system for valve components that takes into account the influence of airtightness. DETAILED DESCRIPTION

[0023] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following 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 specifically claimed by the present invention.

[0024] The oxygen supply device provided by the present invention will be explained below with reference to the accompanying drawings.

[0025] like Figure 1-2 As shown, the utility model provides a pulse oxygen supply device, comprising: a controller, an oxygen supply pressure sensor, a cabin pressure sensor and a plurality of mask assemblies;

[0026] Each mask assembly includes: a mask, a pressure switch, and a solenoid valve; the mask's breathing tube is connected to the aircraft's air source, and the breathing tube is provided with a solenoid valve for controlling on and off, and a pressure switch; the solenoid valve and pressure switch are both connected to the controller;

[0027] The controller is also connected to the cabin pressure sensor and oxygen supply pressure sensor;

[0028] 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;

[0029] The controller is used to generate an opening instruction for the solenoid valve corresponding to the pressure switch based on the detection values ​​of the cabin pressure sensor and the oxygen supply pressure sensor when it detects an oxygen supply demand instruction sent by any pressure switch. The opening instruction includes the opening duration of the solenoid valve.

[0030] The pulse oxygen supply unit is the control unit for each passenger emergency oxygen module. Installed on the passenger emergency oxygen unit, it intelligently controls each actuator. When the cabin altitude reaches a critical condition or receives a command from the host, it activates the latch mechanism and deploys the mask. The altitude switch critical signal is provided by the front-end equipment. When the pressure switch senses the pressure change in the oxygen supply line (downstream of the control valve) caused by the passenger's breathing, it generates an oxygen supply command, which is sent to the controller. Based on the oxygen supply command, the controller intermittently opens and closes the corresponding breathing control valve according to the cabin altitude and the front-end oxygen supply pressure, providing a corresponding amount of oxygen to the mask through pulse oxygen supply. Under normal operation, a single oxygen supply unit can meet the supply requirements of four passengers.

[0031] The pulse oxygen supply system operates as follows: First, the onboard 28VDC power supply is isolated by the electronic controller's isolated power supply and converted to the voltage required by each unit to power the electronic control unit. During operation, the electronic control CPU establishes communication with the onboard computer via the interface unit, receives signals such as jettisoning, and transmits relevant information to the control module. The cabin pressure sensor collects an altitude signal, which is input to the electronic control system's signal conditioning unit for signal processing. The processed signal undergoes analog-to-digital conversion (A / D) and is then input to the electronic control system's central processing unit (CPU). Based on the acquired altitude signal and the flow rate value calculated from the altitude / flow relationship, the oxygen supply flow rate requirements at different altitudes are determined. Simultaneously, the oxygen supply pressure sensor senses changes in the oxygen supply line's demand pressure, generating an oxygen demand signal. The output drive unit then opens the intake solenoid valve, purges the oxygen supply line, and supplies oxygen. This pressure sensor signal is then passed through the electronic control system and the control solenoid valve in a closed-loop control loop to control the oxygen output flow rate at a given altitude. This information is transmitted to the aircraft via serial communication. The requirements are broken down into the following functional requirements.

[0032] In addition, the pulse oxygen supply device functions include the following: 1) indicating the oxygen supply status of each cabin crew member; 2) a fault indication signal light that flashes to indicate the fault mode.

[0033] The pulse oxygen supply system's functions include communication: 1) reporting passenger oxygen mask deployment status to the aircraft; 2) providing an alert indicating a passenger oxygen mask has been deployed; 3) providing mask deployment failure information to the onboard maintenance system; 4) receiving signal detection signals from a remote data collector, performing a bit self-test, and then providing feedback to the remote data collector. 5) providing an assembly and debugging function, allowing internal data to be read externally.

[0034] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

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: mask, pressure switch, solenoid valve; The breathing tube of the mask is connected to the air source of the aircraft. The breathing tube is provided with a solenoid valve for controlling on and off, and a pressure switch is also provided on the breathing tube. Both the solenoid valve and the pressure switch are connected to the controller. The controller is also connected to the cabin pressure sensor and 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, when detecting an oxygen supply demand instruction sent by any pressure switch, generate an opening instruction for the solenoid valve corresponding to the pressure switch based on the detection values ​​of the cabin pressure sensor and the oxygen supply pressure sensor, 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 based on 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, the higher the cabin altitude, 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, the shorter the opening time of the corresponding solenoid valve.

5. The pulse oxygen supply device according to claim 1, characterized in that: The mask assembly further 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 ejection failure.

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