Breathing air supply system and life support equipment

Abstract

The utility model is suitable for the technical field of medical equipment, and provides a breathing air supply system and life support equipment. The breathing air supply system comprises a first air inlet, a second air inlet and a mixing cavity, wherein the mixing cavity comprises a first inlet, a second inlet and an outlet; the first air inlet is communicated with the first inlet, the second air inlet is communicated with the second inlet, and the outlet is communicated with an output interface of a breathing air supply system; a compression pump, a condenser and a molecular sieve separator are sequentially arranged between the second air inlet and the second inlet; and a pumping device is arranged between the outlet and the output interface. Air flows into the first air inlet to guarantee the air amount, and air flowing into the second air inlet is used for providing oxygen and increasing the oxygen concentration. An external oxygen source is not needed, the oxygen concentration of the gas is improved, meanwhile, the gas output quantity can be guaranteed, and the application range is wider.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and particularly relates to a respiratory air supply system and a life support device. Background Art

[0002] During the breathing process, oxygen is inhaled into the lungs and enters the blood through gas exchange, and then is transported to various tissues and organs throughout the body through the blood to supply oxygen to maintain the normal metabolic activities of the patient. At the same time, breathing also discharges carbon dioxide produced in the body out of the body to prevent the accumulation of carbon dioxide in the body from causing acidosis. Maintaining breathing is the most important in the maintenance of life.

[0003] For some patients with difficulty in spontaneous breathing, life support devices are usually used to maintain the breathing of the patients and supply oxygen to the patients. Since oxygen needs to be supplied, most of the common life support devices need to be externally connected to an oxygen gas source, such as a ventilator; some devices do not need to be externally connected to an oxygen gas source, but there is a problem of small continuous output, such as an oxygen generator. Summary of the Utility Model

[0004] The utility model provides a respiratory air supply system, aiming to solve the problems of the need for an externally connected oxygen source or small continuous output in common life support devices.

[0005] The utility model is realized as follows. A respiratory air supply system includes: a first air inlet, a second air inlet, and a mixing chamber. The mixing chamber includes a first inlet, a second inlet, and an outlet;

[0006] The first air inlet is communicated with the first inlet, the second air inlet is communicated with the second inlet, and the outlet is communicated with the output interface of the respiratory air supply system;

[0007] A compression pump, a condenser, and a molecular sieve separator are sequentially arranged between the second air inlet and the second inlet;

[0008] A pumping device is arranged between the outlet and the output interface.

[0009] Optionally, a first filter is arranged between the first air inlet and the first inlet.

[0010] Optionally, a negative pressure sensor is arranged between the first filter and the first inlet.

[0011] Optionally, a solenoid valve is arranged between the molecular sieve separator and the second inlet.

[0012] Optionally, an oxygen flow sensor is arranged between the solenoid valve and the second inlet.

[0013] Optionally, a second filter is provided between the second air inlet and the compression pump.

[0014] Optionally, a pressure sensor is provided between the pumping device and the output interface.

[0015] Optionally, a mixed flow sensor and / or an oxygen concentration sensor are provided between the pumping device and the output interface.

[0016] Optionally, the molecular sieve separator is an N 2 / O 2 molecular sieve separator.

[0017] This embodiment further provides a life support device, including the breathing air supply system described in any one of the above.

[0018] The beneficial effects achieved by the present utility model are as follows. Due to the provision of the first air inlet and the second air inlet, a compression pump, a condenser, and a molecular sieve separator are sequentially provided on the communication path between the second air inlet and the mixing chamber to extract oxygen from the air. Air enters the mixing chamber through the first air inlet. At the same time, air enters through the second air inlet, and the extracted oxygen enters the mixing chamber. The air flowing in through the first air inlet is used to ensure the gas volume, and the air flowing in through the second air inlet is used to provide oxygen, increasing the oxygen concentration. The breathing air supply system provided by the present utility model does not require an external oxygen gas source. While improving the oxygen concentration of the gas, it can ensure the gas output volume and is more widely applicable. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of a breathing air supply system provided by an embodiment of the present utility model;

[0020] Figure 2 is a schematic structural diagram of another breathing air supply system provided by an embodiment of the present utility model.

[0021] Description of the Reference Numerals:

[0022] 100, breathing air supply system; 101, first air inlet; 102, first filter; 103, negative pressure sensor; 104, mixing chamber; 1041, first inlet; 1042, second inlet; 1043, outlet; 105, pumping device; 106, pressure sensor; 107, mixed flow sensor; 108, oxygen concentration sensor; 109, output interface; 110, oxygen flow sensor; 111, solenoid valve; 112, molecular sieve separator; 113, condenser; 114, compression pump; 115, second filter; 116, second air inlet. Detailed Embodiments

[0023] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0029] Since the present utility model is provided with a first air inlet and a second air inlet, a compression pump, a condenser and a molecular sieve separator are sequentially arranged on the communication path between the second air inlet and the mixing chamber for extracting oxygen from the air. Air enters the mixing chamber through the first air inlet. At the same time, air enters through the second air inlet, and the extracted oxygen enters the mixing chamber. The air flowing in through the first air inlet is used to ensure the air volume, and the air flowing in through the second air inlet is used to provide oxygen to increase the oxygen concentration. Without an external oxygen gas source, while increasing the oxygen concentration of the gas, the gas output can be ensured, and it has a wider application range.

[0030] Example 1

[0031] As Figure 1 shown, this embodiment provides a breathing air supply system 100, including: a first air inlet 101, a second air inlet 116 and a mixing chamber 104. The mixing chamber 104 includes a first inlet 1041, a second inlet 1042 and an outlet 1043;

[0032] The first air inlet 101 is communicated with the first inlet 1041, the second air inlet 116 is communicated with the second inlet 1042, and the outlet 1043 is communicated with an output interface 109;

[0033] A compression pump 114, a condenser 113, and a molecular sieve separator 112 are sequentially arranged between the second air inlet 116 and the second inlet 1042;

[0034] A pumping device 105 is arranged between the outlet 1043 and the output interface 109.

[0035] The first air inlet 101 communicates with the first inlet 1041 to introduce air into the mixing chamber 104.

[0036] The second air inlet 116 communicates with the second inlet 1042, and a compression pump 114, a condenser 113, and a molecular sieve separator 112 are also sequentially arranged between the second air inlet 116 and the second inlet 1042.

[0037] Molecular sieves are arranged inside the molecular sieve separator 112. A molecular sieve is a kind of aluminosilicate compound with a cubic structure. Due to the large surface area of the molecular sieve, many voids are formed inside the molecular sieve. Molecules with small voids can be adsorbed, while molecules larger than the voids are excluded. Therefore, molecules with different shape diameters, different polarities, different boiling points, and different saturation degrees can be separated, that is, it has the function of "screening" molecules, so it is called a molecular sieve.

[0038] The composition of air consists of 21% oxygen, 78% nitrogen, and 0.943% noble gases. The molecular sieve can separate oxygen and nitrogen. Oxygen can pass through the molecular sieve while nitrogen cannot. After removing nitrogen, the remaining is relatively high-purity oxygen.

[0039] Air passes through the molecular sieve separator 112, and nitrogen in the air is removed and oxygen is purified.

[0040] The compression pump 114 is arranged after the second air inlet 116 to compress the air to form compressed air, avoiding the generation of negative pressure due to the removal of nitrogen molecules with a large proportion in the air after passing through the molecular sieve separator 112.

[0041] The condenser 113 is arranged after the compression pump 114. A large amount of heat is generated after the air is compressed, causing the temperature of the compressed air to rise. If the high-temperature compressed air passes through the molecular sieve separator 112, the high temperature may cause the molecular sieves in the molecular sieve separator 112 to denature and fail, thus affecting the screening effect and service life of the molecular sieve separator 112. The condenser 113 is provided to cool the compressed high-temperature air.

[0042] Air is compressed by the compression pump 114 from the second air inlet 116, passes through the condenser 113, and then enters the molecular sieve separator 112. Nitrogen molecules in the air are separated by the molecular sieve separator 112, and oxygen molecules pass through the molecular sieve separator 112 and enter the mixing chamber 104.

[0043] The output interface 109 is connected to the outlet 1043 of the mixing chamber 104. A pumping device 105 is provided between the outlet 1043 and the output interface 109 to pump out the gas in the mixing chamber 104 through the output interface 109 for the patient to use.

[0044] In this embodiment, a first air inlet 101 and a second air inlet 116 are provided. A compressor pump 114, a condenser 113, and a molecular sieve separator 112 are sequentially provided on the connection path between the second air inlet 116 and the mixing chamber 104 to extract oxygen from the air. Air enters the mixing chamber 104 from the first air inlet 101. At the same time, air enters from the second air inlet 116, and the extracted oxygen enters the mixing chamber 104. The air flowing in from the first air inlet 101 is used to ensure the gas volume, and the air flowing in from the second air inlet 116 is used to extract oxygen to increase the oxygen concentration. Without an external oxygen gas source, while increasing the oxygen concentration of the gas, the gas output can be ensured, and it is more widely applicable.

[0045] Example 2

[0046] As Figure 2 shown, on the basis of Embodiment 1, a first filter is provided between the first air inlet 101 and the first inlet 1041.

[0047] The first filter is provided on the conveying pipeline to block impurities in the conveyed medium.

[0048] In this embodiment, the first filter 102 is provided between the first air inlet 101 and the first inlet 1041. The air flowing in from the first air inlet 101 passes through the filtration of the first filter 102 to remove impurities in the air, such as particulate matter, dust, etc., making the air flowing into the mixing chamber 104 cleaner, so as to supply the patient with gas of higher cleanliness and avoid the patient inhaling impurities, which has an adverse impact on the patient's recovery.

[0049] Specifically, the first filter 102 can be a turbine filter, which uses a turbine to create a vortex and lifts the radial medium flushing to centrifugal rotary flushing, with a larger cleaning area and more thorough cleaning. It can make the filtration of impurities in the flowing air more thorough.

[0050] Example 3

[0051] As Figure 2 shown, on the basis of Embodiment 2, a negative pressure sensor 103 is provided between the first filter 102 and the first inlet 1041.

[0052] The negative pressure sensor 103 also belongs to the pressure sensor. The working principle of the negative pressure sensor is that the pressure of the medium directly acts on the diaphragm of the sensor, causing the diaphragm to generate a micro-displacement proportional to the medium pressure, changing the resistance of the sensor, and using an electronic circuit to detect this change and convert it into a standard signal corresponding to this pressure.

[0053] The negative pressure sensor measures the pressure value when the measured pressure is lower than the predetermined pressure value. Since the outlet 1043 of the mixing chamber 104 is provided with a pumping device 105 for pumping out the gas in the mixing chamber 104, a negative pressure is generated in the mixing chamber 104, sucking the gas in the passage between the first air inlet 101 and the first inlet 1041 into the mixing chamber 104. The gas in the passage between the first air inlet 101 and the first inlet 1041 is sucked into the mixing chamber 104, which in turn causes a negative pressure in the passage between the first air inlet 101 and the first inlet 1041, sucking air from the first air inlet 101.

[0054] The negative pressure sensor 103 is arranged between the first filter 102 and the first inlet 1041 to monitor the suction pressure of the first inlet 1041. When the reading of the negative pressure sensor 103 is abnormal, it indicates that there is a blockage in the first air inlet 101 or in the passage between the first air inlet 101 and the first inlet 1041.

[0055] Example 4

[0056] As Figure 2 shown, on the basis of Example 1, a solenoid valve 111 is arranged between the molecular sieve separator 112 and the second inlet 1042.

[0057] The solenoid valve 111 is arranged between the molecular sieve separator 112 and the second inlet 1042. The solenoid valve 111 is used to control the connection or disconnection of the passage between the second air inlet 116 and the second inlet 1042. When the solenoid valve 111 is opened, the passage between the second air inlet 116 and the second inlet 1042 is connected. When the second solenoid valve 111 is closed, the passage between the second air inlet 116 and the second inlet 1042 is closed.

[0058] In use, when the patient is breathing normally and there is no need to increase the oxygen concentration of the inhaled gas, the solenoid valve 111 is closed, and only the passage between the first air inlet 101 and the first inlet 1041 is connected. The oxygen concentration of the gas in the mixing chamber 104 is the same as that in the air. When the patient needs to increase the oxygen concentration of the inhaled gas, the solenoid valve 111 is opened, and air passes through the molecular sieve separator 112 from the second air inlet 116, and oxygen flows into the mixing chamber 104 and mixes with the air flowing into the mixing chamber 104 from the first air inlet 101, increasing the oxygen concentration of the gas in the mixing chamber 104, which is convenient for control.

[0059] Example 5

[0060] As Figure 2 shown, on the basis of Example 4, an oxygen flow sensor 110 is provided between the solenoid valve 111 and the second inlet 1042.

[0061] The oxygen flow sensor 110, also known as an oxygen flow meter, is an instrument used to measure the oxygen flow rate.

[0062] The oxygen flow sensor 110 is provided between the solenoid valve and the second inlet 1042 to detect the flow rate of the oxygen flowing into the mixing chamber 104. The flow rate of the oxygen is positively correlated with the oxygen concentration of the gas in the mixing chamber 104.

[0063] Example 6

[0064] As Figure 2 shown, on the basis of Example 1, a second filter 115 is provided between the second air inlet 116 and the compressor pump 114.

[0065] The second filter 115 is used to filter the impurities in the air flowing in from the second air inlet 116, making the air flowing into the compressor pump 114 cleaner.

[0066] Example 7

[0067] As Figure 2 shown, on the basis of Example 1, a pressure sensor is provided between the pumping device 105 and the output interface 109.

[0068] A pressure sensor is a device or apparatus that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule. The pressure sensor can be used to measure the pressure or the gas pressure.

[0069] The pressure sensor is provided between the pumping device 105 and the output interface 109 to monitor the gas pressure flowing through the output interface 109. The output interface 109 supplies gas to the patient for use, avoiding excessive gas pressure supply and causing damage to the patient's respiratory tract.

[0070] Example 8

[0071] As Figure 2 shown, on the basis of Example 1, a mixed flow sensor 107 and / or an oxygen concentration sensor 108 are provided between the pumping device 105 and the output interface 109.

[0072] The mixed flow sensor 107 is used to monitor the flow rate of the mixed gas flowing out of the mixing chamber 104.

[0073] The oxygen concentration sensor 108 is used to monitor the oxygen concentration of the mixed gas flowing out of the mixing chamber 104.

[0074] Embodiment Nine

[0075] On the basis of Embodiment One, the molecular sieve separator 112 is an N 2 / O 2 molecular sieve separator.

[0076] Specifically, it can be a zeolite molecular sieve separator. Utilizing the difference in the equilibrium adsorption of N 2 / O 2 on its surface, N is selectively adsorbed 2 . Because the polarizability of N 2 is relatively large, N 2 interacts more strongly with the cations and polar surfaces in the zeolite molecular sieve than O 2 . LiA-type zeolite molecular sieve has a higher N 2 / O 2 selectivity ratio and N 2 adsorption capacity, but its thermal stability is poor. The A-type zeolite molecular sieve after being exchanged with Li+ and alkaline earth metal mixed cations has a higher N 2 / O 2 selective separation coefficient, N 2 adsorption capacity and higher thermal stability.

[0077] Embodiment Ten

[0078] This embodiment provides a life support device, including the breathing air supply system 100 of any one of the above Embodiment One to Embodiment Nine.

[0079] The beneficial effects of the life support device in this embodiment are equivalent to those of the above breathing air supply system 100, and will not be elaborated here.

[0080] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A breathing air supply system, characterized in that: include: a first air inlet, a second air inlet and a mixing chamber, the mixing chamber comprising a first inlet, a second inlet and an outlet; The first air inlet is in communication with the first inlet, the second air inlet is in communication with the second inlet, and the outlet is in communication with the output interface of the respiratory air supply system; A compression pump, a condenser and a molecular sieve separator are sequentially arranged between the second air inlet and the second inlet; A pumping device is arranged between the outlet and the output interface.

2. The breathing air supply system according to claim 1, characterized in that: A first filter is disposed between the first air inlet and the first inlet.

3. The breathing air supply system according to claim 2, characterized in that: A negative pressure sensor is arranged between the first filter and the first inlet.

4. The breathing air supply system according to claim 1, characterized in that: A solenoid valve is provided between the molecular sieve separator and the second inlet.

5. The breathing air supply system according to claim 4, characterized in that: An oxygen flow sensor is arranged between the solenoid valve and the second inlet.

6. The breathing air supply system according to any one of claims 1 to 5, characterized in that: A second filter is arranged between the second air inlet and the compression pump.

7. The breathing air supply system according to claim 1, characterized in that: A pressure sensor is arranged between the pumping device and the output interface.

8. The respiratory air supply system as claimed in claim 1 or 7, characterized in that A mixed flow sensor and / or an oxygen concentration sensor is arranged between the pumping device and the output interface.

9. The respiratory air supply system of claim 1, characterized in that The molecular sieve separator is a N2 / O2 molecular sieve separator.

10. A life support device, characterized in that: A breathing air supply system comprising any one of claims 1 to 9.

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