Electric control closed-loop control system capable of improving utilization efficiency of molecular sieve oxygen production

Abstract

The utility model discloses an electric control closed-loop control system capable of improving the oxygen production utilization efficiency of a molecular sieve, and belongs to the technical field of oxygen production valves. Comprising an oxygen generation valve body which is provided with a first inner cavity and a second inner cavity, and the first inner cavity and the second inner cavity are connected with the AB end of an external molecular sieve respectively; the pressure sensor is embedded in the first inner cavity and the second inner cavity; and the assembly control panel is used for receiving the pressure values detected by the pressure sensors and controlling the switching of the first inner cavity and the second inner cavity and the air inlet time according to the received pressure values. The pressure sensors monitor air pressure values of the first inner cavity and the second inner cavity in real time, the assembly control panel correspondingly controls air inlet switching and air inlet amount of the first inner cavity and the second inner cavity through the air pressure values provided by the two pressure sensors, and therefore the pressure of the first inner cavity and the pressure of the second inner cavity are kept in a balanced state all the time. The pressures of the two ends A and B of the molecular sieve during adsorption work are close, so that the oxygen production efficiency of the oxygen generator is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oxygen production valves, and in particular relates to an electric control closed-loop control system capable of improving the utilization efficiency of molecular sieve oxygen production. Background Art

[0002] There is generally a fixed pressure range for the oxygen generator to generate oxygen with the best efficiency. The switching time of the oxygen generator valve in a conventional oxygen generator is fixed. For example, the A end of the oxygen generator works for 5S and then switches to the B end to work for 5S. Due to the limitations of the production and assembly process, the gas flow rate at the AB end of the oxygen generator and the filling density and content of the adsorption particles at the AB end of the molecular sieve barrel cannot be absolutely the same, so it may cause uneven pressure at both ends. For example, the pressure at the A end of the molecular sieve is 1.4bar after being inflated for 5S, and the pressure at the B end can reach 2bar or less than 1.4bar after being inflated for 5S. This will lead to low oxygen efficiency of the oxygen generator, or the need to add more adsorption particles to achieve the required performance. Summary of the invention

[0003] The utility model aims at the above problems existing in the prior art and proposes an electric control closed-loop control system which can improve the utilization efficiency of molecular sieve oxygen production.

[0004] The utility model can be realized through the following technical solutions:

[0005] An electronically controlled closed-loop control system capable of improving the utilization efficiency of molecular sieve oxygen production comprises:

[0006] The oxygen-generating valve body has a first inner cavity and a second inner cavity, wherein the first inner cavity and the second inner cavity are respectively connected to the AB end of the external molecular sieve;

[0007] A pressure sensor embedded in the first inner cavity and the second inner cavity;

[0008] The assembly control board is used to receive the pressure values ​​detected by each of the pressure sensors, and control the switching and air intake time between the first inner cavity and the second inner cavity according to the received pressure values, thereby controlling the working switching and inflation time of the molecular sieve AB end.

[0009] As a further improvement of the present invention, two ends of the oxygen-generating valve body are respectively connected to a first pilot valve and a second pilot valve.

[0010] As a further improvement of the present invention, the first pilot valve and the second pilot valve are electrically connected to the assembly control board respectively, and the assembly control board can automatically control the power on and off of the first pilot valve and the second pilot valve.

[0011] As a further improvement of the utility model, the oxygen-generating valve body has an air inlet, a first air outlet, a first exhaust port, a second air outlet, and a second exhaust port, wherein:

[0012] A first air inlet valve port is provided between the air inlet and the first air outlet, and a first air exhaust valve port is provided between the first air outlet and the first air exhaust port;

[0013] A second air inlet valve port is provided between the air inlet and the second air outlet, and a second air exhaust valve port is provided between the second air outlet and the second air exhaust port.

[0014] As a further improvement of the utility model, the first inner cavity comprises a first valve core and a first return spring, and the second inner cavity comprises a second valve core and a second return spring. In an initial state, the first valve core opens the first intake valve port and closes the first exhaust valve port under the action of the first return spring, and the second valve core opens the second intake valve port and closes the second exhaust valve port under the action of the second return spring.

[0015] As a further improvement of the present invention, the first pilot valve and the second pilot valve are switched to be energized. When the first pilot valve is energized, the second pilot valve is de-energized. At this time, the first intake valve port is closed and the first exhaust valve port is opened, and the second intake valve port is opened and the second exhaust valve port is closed.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] By burying pressure sensors in the two inner chambers of the oxygen generator body, the air pressure values ​​of the first inner chamber and the second inner chamber are monitored in real time. The assembly control board controls the air intake switching and air intake volume of the first inner chamber and the second inner chamber accordingly through the air pressure values ​​provided by the two pressure sensors, thereby making the pressures at both ends AB of the molecular sieve close during adsorption work, thereby improving the oxygen production efficiency of the oxygen generator and enabling it to maintain the optimal oxygen production efficiency for oxygen production work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of an electric closed-loop control system of the utility model that can improve the utilization efficiency of molecular sieve oxygen production;

[0019] Figure 2 It is a structural schematic diagram of the oxygen-generating valve of the utility model;

[0020] Figure 3 It is a cross-sectional view of the oxygen-making valve of the utility model.

[0021] In the figure, 100, oxygen valve body; 101, air inlet; 102, first air outlet; 103, first exhaust port; 104, second air outlet; 105, second exhaust port; 110, first inner cavity; 111, first valve core; 112, first return spring; 120, second inner cavity; 121, second valve core; 122, second return spring; 130, pressure sensor; 140, assembly control board; 200, first pilot valve; 300, second pilot valve. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1-3 As shown, the utility model provides an electronically controlled closed-loop control system that can improve the utilization efficiency of molecular sieve oxygen production, including:

[0024] The oxygen-generating valve body 100 has a first inner cavity 110 and a second inner cavity 120, wherein the first inner cavity 110 and the second inner cavity 120 are respectively connected to the AB end of the external molecular sieve;

[0025] A pressure sensor 130, which is embedded in the first inner cavity 110 and the second inner cavity 120;

[0026] The assembly control board (not shown in the figure) is used to receive the pressure values ​​detected by each pressure sensor 130, and control the air intake switching and air intake time of the first inner cavity 110 and the second inner cavity 120 according to the received pressure values, thereby controlling the working switching and inflation time of the molecular sieve AB end.

[0027] That is to say, the electronically controlled closed-loop control system provided in the present embodiment monitors the air pressure values ​​of the first inner cavity 110 and the second inner cavity 120 in real time by embedding pressure sensors 130 in the two inner cavities of the oxygen-generating valve body 100, and the assembly control board controls the air intake switching and air intake volume of the first inner cavity 110 and the second inner cavity 120 correspondingly through the air pressure values ​​provided by the two pressure sensors 130, thereby making the pressures at both ends AB of the molecular sieve close during adsorption operation, thereby improving the oxygen production efficiency of the oxygen generator and enabling it to maintain the optimal oxygen production efficiency for oxygen production operation.

[0028] Preferably, the two ends of the oxygen-generating valve body 100 are respectively connected to the first pilot valve 200 and the second pilot valve 300 , and the pilot gas introduced by the first pilot valve 200 and the second pilot valve 300 realizes the switching of the oxygen-generating valve body 100 between the working state and the exhaust state.

[0029] Among them, the first pilot valve 200 and the second pilot valve 300 are electrically connected to the assembly control board respectively, and the assembly control board can automatically control the power on and off of the first pilot valve 200 and the second pilot valve 300. In this embodiment, the first pilot valve 200 and the second pilot valve 300 are switched on and off, that is, when the first pilot valve 200 is powered on, the second pilot valve 300 is powered off, and vice versa, when the first pilot valve 200 is powered off, the second pilot valve 300 is powered on.

[0030] Preferably, the oxygen-generating valve body 100 has an air inlet 101, a first air outlet 102, a first exhaust port 103, a second air outlet 104, and a second exhaust port 105, wherein:

[0031] A first air inlet valve port is provided between the air inlet 101 and the first air outlet 102 , and a first air outlet valve port is provided between the first air outlet 102 and the first air outlet 103 ;

[0032] A second air inlet valve port is provided between the air inlet 101 and the second air outlet 104 , and a second air outlet valve port is provided between the second air outlet 104 and the second air outlet 105 .

[0033] Preferably, the first inner cavity 110 has a first valve core 111 and a first return spring 112, and the second inner cavity 120 has a second valve core 121 and a second return spring 122. In the initial position, the first valve core 111 opens the first intake valve port and closes the first exhaust valve port under the action of the first return spring 112. Similarly, the second valve core 121 opens the second intake valve port and closes the second exhaust valve port under the action of the second return spring 122.

[0034] At this time, if the first pilot valve 200 is energized, its pilot gas pushes the first valve core 111 to move to open the first exhaust valve port and close the first intake valve port, and the A end of the molecular sieve is in the exhaust state. At the same time, the second pilot valve 300 is in the power-off state, the second intake valve port is opened and the second exhaust valve port is closed, and the B end of the molecular sieve is in the intake state, and vice versa.

[0035] Therefore, once the air pressure in the first inner cavity 110 and the second inner cavity 120 of the oxygen-generating valve body 100 becomes unbalanced, the assembly control board 140 can correspondingly control one of the pilot valves to be energized, thereby controlling the air intake pressure of the first inner cavity 110 and the second inner cavity 120 to always be maintained within a fixed pressure range, and the oxygen generator maintains oxygen production at the optimal oxygen production efficiency.

[0036] The technical means disclosed in the scheme of the utility model are not limited to the technical means disclosed by the above technical means, but also include technical solutions composed of any combination of the above technical features. The above is a specific implementation method of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An electronically controlled closed-loop control system capable of improving the utilization efficiency of molecular sieve oxygen production, characterized in that: include: The oxygen-generating valve body has a first inner cavity and a second inner cavity, wherein the first inner cavity and the second inner cavity are respectively connected to the AB end of the external molecular sieve; A pressure sensor embedded in the first inner cavity and the second inner cavity; The assembly control board is used to receive the pressure values ​​detected by each of the pressure sensors, and control the switching and air intake time between the first inner cavity and the second inner cavity according to the received pressure values, thereby controlling the working switching and inflation time of the molecular sieve AB end.

2. The electronically controlled closed-loop control system for improving the oxygen production efficiency of molecular sieves according to claim 1, characterized in that: The two ends of the oxygen production valve body are respectively connected with a first pilot valve and a second pilot valve.

3. The electronically controlled closed-loop control system for improving the oxygen production efficiency of molecular sieves according to claim 2, characterized in that: The first pilot valve and the second pilot valve are electrically connected to the assembly control board respectively, and the assembly control board can automatically control the power on and off of the first pilot valve and the second pilot valve.

4. The electronically controlled closed-loop control system for improving the oxygen production efficiency of molecular sieves according to claim 2, characterized in that: The oxygen-generating valve body comprises an air inlet, a first air outlet, a first exhaust port, a second air outlet, and a second exhaust port.

5. The electronically controlled closed-loop control system for improving the oxygen production efficiency of molecular sieves according to claim 4, characterized in that: A first air inlet valve port is provided between the air inlet and the first air outlet, and a first air exhaust valve port is provided between the first air outlet and the first air exhaust port; A second air inlet valve port is provided between the air inlet and the second air outlet, and a second air exhaust valve port is provided between the second air outlet and the second air exhaust port.

6. The electronically controlled closed-loop control system for improving the oxygen production efficiency of molecular sieves according to claim 5, characterized in that: The first inner cavity has a first valve core and a first return spring, and the second inner cavity has a second valve core and a second return spring. In an initial state, the first valve core opens the first intake valve port and closes the first exhaust valve port under the action of the first return spring, and the second valve core opens the second intake valve port and closes the second exhaust valve port under the action of the second return spring.

7. The electronically controlled closed-loop control system for improving the oxygen production efficiency of molecular sieves according to claim 5, characterized in that: The first pilot valve and the second pilot valve are switched to be energized. When the first pilot valve is energized, the second pilot valve is de-energized. At this time, the first intake valve port is closed and the first exhaust valve port is opened, and the second intake valve port is opened and the second exhaust valve port is closed.

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