Precise control device for oxygen pulse amount of oxygen generator

Abstract

The utility model discloses a precise control device for oxygen pulse quantity of an oxygen generator, which comprises a controller, sensors, an air compressor, a molecular sieve adsorption tower and an oxygen storage tank, the air compressor, the molecular sieve adsorption tower and the oxygen storage tank are sequentially connected, a control valve is mounted at an oxygen outlet of the oxygen storage tank and connected with a nasal oxygen tube, and the sensors comprise a pressure sensor and a breathing pressure sensor. The pressure sensor is connected with the oxygen storage tank and used for detecting the pressure value in the oxygen storage tank, the breathing pressure sensor is connected with the nasal oxygen tube and used for detecting the breathing condition of a user, and the controller is electrically connected with the air compressor, the control valve, the pressure sensor and the breathing pressure sensor and controls the rotating speed of the air compressor to adjust the single-time pulse oxygen supply amount of the oxygen generator. According to the device, the pressure value in the oxygen storage tank is kept stable in a feedback mode, so that the pulse oxygen supply precision can still be ensured when the oxygen generator is used for a long time, and the oxygen uptake requirement of a user is better met.

Description

Technical Field

[0001] The utility model belongs to the technical field of oxygen generators, and particularly relates to a precise control device for the oxygen pulse quantity of an oxygen generator. Background Technique

[0002] An oxygen generator is a commonly used device for producing and supplying oxygen, generally including an air compressor, a molecular sieve adsorption tower, an oxygen storage tank, etc. The air compressor of the oxygen generator generally adopts a fixed speed, produces oxygen through the molecular sieve adsorption tower, stores the generated oxygen in the oxygen storage tank, and is connected to the outside through a solenoid valve. When the solenoid valve is briefly opened, the device will generate an oxygen pulse, and the oxygen pulse is transported to the user's body through an oxygen delivery tube. The variation range of the oxygen supply pulse quantity of the existing oxygen generator is relatively large. Especially when the user's breathing rate is much higher than the set value, the oxygen generator may cause the single - pulse oxygen quantity to be much less than the set value due to insufficient pressure in the oxygen storage tank, making it difficult to meet the user's oxygen inhalation needs. Content of the Utility Model

[0003] The purpose of the utility model is to solve at least one problem of the existing technology, and propose a precise control device for the oxygen pulse quantity of an oxygen generator.

[0004] To achieve the above - mentioned purpose, the utility model proposes a precise control device for the oxygen pulse quantity of an oxygen generator, including a controller, a sensor, an air compressor, a molecular sieve adsorption tower, and an oxygen storage tank connected in sequence. A control valve is installed at the oxygen outlet of the oxygen storage tank, and the control valve is connected to an oxygen nasal tube. The sensor includes a pressure sensor and a respiratory pressure sensor. The pressure sensor is connected to the oxygen storage tank and is used to detect the pressure value in the oxygen storage tank. The respiratory pressure sensor is connected to the oxygen nasal tube and is used to detect the user's breathing condition. The controller is electrically connected to the air compressor, the control valve, the pressure sensor, and the respiratory pressure sensor, and controls the rotation speed of the air compressor to adjust the single - pulse oxygen supply quantity of the oxygen generator.

[0005] Preferably, the controller includes a DSP control chip or a PIC control chip.

[0006] Preferably, the control valve is a solenoid valve or a proportional valve.

[0007] Preferably, a flow meter is provided between the oxygen storage tank and the control valve, and the flow meter is electrically connected to the controller.

[0008] Advantages of the present utility model: By using a respiratory pressure sensor to detect the user's respiratory signal and transmit the detected respiratory signal to the controller, and using a pressure sensor to detect the pressure in the oxygen storage tank and transmit the detected pressure value to the controller, the controller compares the detected value with the preset value, and then controls the rotation speed of the air compressor. Through the negative feedback method of the sensor, the pressure value in the oxygen storage tank is maintained stable, so as to ensure that the oxygen generator can still ensure the pulse oxygen supply accuracy during long-term use, and better meet the user's oxygen inhalation needs.

[0009] The features and advantages of the present utility model will be described in detail through embodiments in conjunction with the accompanying drawings. Description of the Drawings

[0010] Figure 1 is the working principle diagram of the embodiment of the present utility model.

[0011] In the figure: 1 - controller, 2 - respiratory pressure sensor, 3 - air compressor, 4 - molecular sieve adsorption tower, 5 - oxygen storage tank, 6 - control valve, 7 - pressure sensor, 8 - nasal oxygen tube. Detailed Embodiment

[0012] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application described and illustrated herein can generally be arranged and designed in various different configurations. In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is usually placed. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0013] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0014] The following will describe the present utility model in detail in conjunction with the respective drawings.

[0015] Refer toFigure 1 , this embodiment provides a precise control device for the oxygen pulse volume of an oxygen generator, including a controller 1, sensors, an air compressor 3, a molecular sieve adsorption tower 4, and an oxygen storage tank 5 connected in sequence. A control valve 6 is installed at the oxygen outlet of the oxygen storage tank 5, and the control valve 6 is connected to a nasal oxygen tube 8. The sensors include a pressure sensor 7 and a respiratory pressure sensor 2. The pressure sensor 7 is connected to the oxygen storage tank 5 and is used to detect the pressure value in the oxygen storage tank 5. The respiratory pressure sensor 2 is connected to the nasal oxygen tube 8 and is used to detect the user's breathing condition. The controller 1 is electrically connected to the air compressor 3, the control valve 6, the pressure sensor 7, and the respiratory pressure sensor 2, and controls the rotation speed of the air compressor 3 to adjust the single-pulse oxygen supply volume of the oxygen generator.

[0016] Among them, the models of the pressure sensor 7 and the respiratory pressure sensor 2 are MPXV5100GC6U and MPXV7007GP respectively. The respiratory pressure sensor 2 transmits the detected breathing signal of the user to the controller 1. The controller 1 calculates the number of breaths per minute of the user and controls the rotation speed of the air compressor 3 to adjust the single-pulse oxygen supply volume of the oxygen generator. The pressure sensor 7 detects the pressure value in the oxygen storage tank 5 and transmits the detected pressure value to the controller 1. When the detected pressure value is less than the preset value, the controller 1 controls the rotation speed of the air compressor 3 to increase.

[0017] In this embodiment, the controller 1 includes a DSP control chip or a PIC control chip, and the model of the DSP control chip is dsPIC33FJ64MC506.

[0018] In this embodiment, the control valve 6 is a solenoid valve or a proportional valve.

[0019] In this embodiment, a flow meter is provided between the oxygen storage tank 5 and the control valve 6, and the flow meter is electrically connected to the controller 1.

[0020] Working process of the present utility model:

[0021] During the working process of this precise control device for the oxygen pulse volume of the oxygen generator, the air compressor 3 of the oxygen generator starts with default parameters. After the air compressor 3 starts, air flows to the molecular sieve adsorption tower 4 to generate oxygen, and the oxygen is stored in the oxygen storage tank 5. When the user needs to inhale oxygen, the control valve 6 is opened, and the oxygen in the oxygen storage tank 5 is stably delivered to the user's body. During the use process, the controller 1 counts the number of breathing signals received by the respiratory pressure sensor 2 in one minute. The pressure sensor 7 transmits the pressure data in the oxygen storage tank 5 to the controller 1 in real time. The controller 1 adjusts the rotation speed of the air compressor 3 to maintain the pressure stability in the oxygen storage tank 5. The feedback function of the pressure sensor 7 can make up for the problems of insufficient system pressure and decreased single-pulse volume caused by the performance degradation of the air compressor 3 or the airtightness problem of the air circuit during the continuous operation of the device.

[0022] Introduced with actual usage examples: After the oxygen generator starts working, the air compressor first runs at the default parameter of 2000 RPM. The user wears a nasal oxygen tube and inhales oxygen at a rate of 22 times per minute. At this time, the pressure in the oxygen storage tank is 40 Kpa, which is lower than the preset value of 50 Kpa. The respiratory pressure sensor captures the negative pressure respiratory signal through the change in gas path pressure and sends the respiratory signal to the controller. The controller counts that the actual respiratory rate of the user is within the range of 20 - 25 times per minute. The control chip of the controller controls the air compressor speed to be adjusted to 2500 RPM to ensure that the pressure in the oxygen storage tank is maintained at about the preset value of 50 Kpa. In addition, considering that the long-term use of the air compressor may cause performance degradation, an additional PID compensation function for the oxygen storage tank pressure is added. When the device has been used for more than 2 years, when the user breathes at a rate of 22 times per minute, the air compressor works with the parameter of 2500 RPM, and the pressure may only be maintained at about 45 Kpa. If the pressure sensor detects that the pressure in the oxygen storage tank does not reach 50 Kpa, the controller controls the air compressor speed to be adjusted to 2650 RPM to ensure that the pressure in the oxygen storage tank is always consistent with the set value of 50 Kpa, so as to achieve the function of accurately controlling the single pulse quantity, that is, ensuring the oxygen generation effect of the oxygen generator and meeting the oxygen inhalation needs of users.

[0023] The above embodiments are illustrative of the present invention, not limiting of the present invention. Any solution obtained by simply changing the present invention belongs to the protection scope of the present invention.

Claims

1. A precise control device for oxygen pulse quantity of an oxygen concentrator, characterized in that: It includes a controller, a sensor, an air compressor, a molecular sieve adsorption tower, and an oxygen storage tank connected in sequence. The oxygen outlet of the oxygen storage tank is installed with a control valve, and the control valve is connected to the nasal oxygen tube. The sensor includes a pressure sensor and a respiratory pressure sensor. The pressure sensor is connected to the oxygen storage tank and is used to detect the pressure value in the oxygen storage tank. The respiratory pressure sensor is connected to the nasal oxygen tube and is used to detect the user's breathing condition. The controller is electrically connected to the air compressor, the control valve, the pressure sensor, and the respiratory pressure sensor, and controls the rotation speed of the air compressor to adjust the single pulse oxygen supply of the oxygen generator.

2. A precise control device for oxygen pulse quantity of an oxygen concentrator as claimed in claim 1, characterized in that: The controller includes a DSP control chip or a PIC control chip.

3. The precise control device for oxygen pulse quantity of an oxygen concentrator according to claim 1, characterized in that: The control valve is a solenoid valve or a proportional valve.

4. The precise control device for oxygen pulse quantity of an oxygen concentrator according to claim 1, characterized in that: A flow meter is provided between the oxygen storage tank and the control valve, and the flow meter is electrically connected to the controller.

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