Self-cleaning system of VPSA oxygen generator and VPSA oxygen generator

Abstract

The utility model discloses a self-cleaning system of a VPSA oxygen generator and the VPSA oxygen generator. The self-cleaning system comprises an air inlet filter element, a compressor, a molecular sieve A tank body and a molecular sieve B tank body, a switching valve is arranged between the air inlet filter element and the compressor, and the compressor is connected with the air inlet filter element through the switching valve; direct-acting valves are arranged between the compressor and the molecular sieve A tank body and between the compressor and the molecular sieve B tank body, and the compressor is respectively connected with the molecular sieve A tank body and the molecular sieve B tank body through the direct-acting valves. According to the self-cleaning system of the VPSA oxygen generator, the compressor of the VPSA oxygen generator is combined with the arranged switching valve to form the self-cleaning system of the VPSA oxygen generator, the air inlet filter element can be respectively communicated and connected with the positive pressure air inlet connector and the positive pressure exhaust connector of the compressor, self-cleaning of the air inlet filter element is achieved, and therefore excessive dust deposition of the air inlet filter element is avoided, and the service life of the VPSA oxygen generator is prolonged. A long service life can be achieved, or the air inlet filter element does not need to be replaced or maintained within the whole service life of the VPSA oxygen generator.

Description

Technical Field

[0001] The utility model belongs to the technical field of oxygen concentrators, and in particular relates to a self-cleaning system of a VPSA oxygen concentrator and the VPSA oxygen concentrator. Background Art

[0002] The oxygen concentrator using the VPSA adsorption principle is generally composed of a compressor, an integrated valve, and two molecular sieve tanks. The output end of the compressor is connected to the input end of the integrated valve, and the two compressed air output ends of the integrated valve are respectively connected to the input ends of the two molecular sieve tanks. The output ends of the two molecular sieve tanks are connected to the oxygen outlet. The integrated valve can control the alternating intake and exhaust of the two molecular sieve tanks to ensure the concentration of the output oxygen, and the residual gas at the input end of the molecular sieve tank can be discharged from the exhaust end of the integrated valve. In order to extend the service life of the compressor, an air intake filter element is also set at the input end of the compressor. The outside air enters the compressor after being filtered by the air intake filter element to ensure that the air input to the compressor is relatively clean. Due to different use environments, there may be dust and floccules that often cause the filter element to be blocked. If the filter element is not replaced normally, the service life of the oxygen concentrator will be seriously reduced. Generally, the replacement frequency of this filter element is also relatively high. Therefore, it is necessary to design a self-cleaning system for a VPSA oxygen concentrator that can clean the air intake filter element to ensure the service life of the compressor of the oxygen concentrator and the oxygen concentrator itself. Utility Model Content

[0003] The utility model aims at the above problems, makes up for the deficiencies of the prior art, and provides a self-cleaning system of a VPSA oxygen concentrator and a VPSA oxygen concentrator.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A self-cleaning system for a VPSA oxygen concentrator comprises an air intake filter element, a compressor, a molecular sieve A tank body, and a molecular sieve B tank body; a switching valve is arranged between the air intake filter element and the compressor, and the compressor is connected to the air intake filter element through the switching valve; a direct-acting valve is arranged between the compressor and the molecular sieve A tank body and the molecular sieve B tank body, and the compressor is connected to the molecular sieve A tank body and the molecular sieve B tank body respectively through the direct-acting valve.

[0006] Furthermore, the compressor is a four-cylinder compressor, and the compressor is provided with a compressor positive pressure air intake interface e, a compressor negative pressure air intake interface h, a compressor negative pressure exhaust interface f, and a compressor positive pressure exhaust interface i. The switching valve is provided with interfaces b, c, and d, and the direct-acting valve is provided with interfaces j, k, l, and m; the compressor positive pressure air intake interface e is connected to the interface c of the switching valve, the compressor negative pressure air intake interface h is connected to the interface k of the direct-acting valve, and the compressor positive pressure exhaust interface i is respectively connected to the interface d of the switching valve and the interface j of the direct-acting valve; the interface b of the switching valve is connected to the air intake filter element, and the direct-acting valve interfaces l and m are respectively connected to the input and output of the molecular sieve A tank body and the molecular sieve B tank body.

[0007] Furthermore, the compressor negative pressure exhaust interface f of the compressor is connected to an exhaust tank, and the exhaust tank is an exhaust silencer tank.

[0008] Furthermore, the output ends of the molecular sieve A tank body and the molecular sieve B tank body are commonly connected to an oxygen storage tank.

[0009] A VPSA oxygen concentrator includes a self-cleaning system of the VPSA oxygen concentrator.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model forms a self-cleaning system of the VPSA oxygen concentrator by utilizing the air intake filter element and the compressor of the VPSA oxygen concentrator in combination with the provided switching valve, and can conduct and connect the air intake filter element to the positive pressure air intake interface and the positive pressure exhaust interface of the compressor respectively, thereby realizing self-cleaning of the air intake filter element, so that the air intake filter element will not have excessive dust deposition, and can achieve a long service life, or the air intake filter element does not need to be replaced or maintained during the entire service life of the VPSA oxygen concentrator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a structural schematic diagram of a self-cleaning system of a VPSA oxygen generator.

[0013] Figure 2 The utility model is a schematic diagram of a working state structure of a self-cleaning system of a VPSA oxygen generator.

[0014] Figure 3 The utility model is a structural schematic diagram of another working state of a self-cleaning system of a VPSA oxygen generator. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] Reference Figure 1 The embodiment of the utility model provides a self-cleaning system for a VPSA oxygen concentrator, including an air intake filter, a compressor, a molecular sieve A tank, a molecular sieve B tank, an exhaust tank, and an oxygen storage tank; a switching valve is provided between the air intake filter and the compressor, and the compressor is connected to the air intake filter through the switching valve; a direct-acting valve is provided between the compressor and the molecular sieve A tank and the molecular sieve B tank, and the compressor is connected to the molecular sieve A tank and the molecular sieve B tank respectively through the direct-acting valve; the compressor is a four-cylinder compressor, and the compressor is provided with a compressor positive pressure air intake interface e, a compressor negative pressure air intake interface h, a compressor negative pressure exhaust interface f, and a compressor positive pressure exhaust interface i The switching valve is provided with interfaces b, c and d, and the direct-acting valve is provided with interfaces j, k, l and m; the positive-pressure air intake interface e of the compressor is connected to the interface c of the switching valve, the negative-pressure air intake interface h of the compressor is connected to the interface k of the direct-acting valve, and the positive-pressure exhaust interface i of the compressor is respectively connected to the interface d of the switching valve and the interface j of the direct-acting valve; the interface b of the switching valve is connected to the air intake filter element, and the interfaces l and m of the direct-acting valve are respectively connected to the input and output of the molecular sieve A tank body and the molecular sieve B tank body; the negative-pressure exhaust interface f of the compressor is connected to an exhaust tank, which is an exhaust silencer tank; the output ends of the molecular sieve A tank body and the molecular sieve B tank body are commonly connected to an oxygen storage tank.

[0017] The embodiment of the utility model further provides a VPSA oxygen concentrator, including a self-cleaning system of the VPSA oxygen concentrator.

[0018] Specifically, the positive pressure of two cylinders of the four-cylinder compressor is used as positive pressure adsorption of the molecular sieve A tank and the molecular sieve B tank; the negative pressure of two cylinders of the four-cylinder compressor is used as negative pressure analysis of the molecular sieve A tank and the molecular sieve B tank; the direct-acting valve is used as a key component for alternating oxygen production and analysis of the molecular sieve A tank and the molecular sieve B tank of the VPSA oxygen generator.

[0019] Combination Figure 2 and Figure 3 As shown, by controlling the power off and power on of the switching valve, the following working state of the VPSA oxygen generator of the utility model is obtained.

[0020] State 1: When the control switching valve is powered off, the ports b and c of the switching valve are connected, and the port d of the switching valve is closed. This is the normal working state of the VPSA oxygen generator. Figure 2 As shown; at this time, the direct-acting valve performs normal oxygen production switching and can output ≥90% oxygen.

[0021] State 2: When the control switching valve is powered on, the ports b and d of the switching valve are connected, and the port c of the switching valve is closed; at this time, the air inlet filter of the VPSA oxygen generator is in the self-cleaning state, such as Figure 3 shown.

[0022] When the VPSA oxygen generator is turned off, a set of self-cleaning logic for the air intake filter will be executed through the logic controller inside the VPSA oxygen generator: that is, switching control is performed between state 1 and state 2. In state 1, the compressor positive pressure air intake interface e of the VPSA oxygen generator is inhaled, and the compressor positive pressure exhaust interface i is pressurized and stored. When switching to state 2, the compressor positive pressure air intake interface e of the VPSA oxygen generator is closed, and the stored air pressure is discharged from the compressor positive pressure exhaust interface i through the interface b of the switching valve to perform gas flushing and cleaning of the air intake filter. At this time, there is no negative intake pressure of the compressor, and the flushing effect is significantly enhanced.

[0023] Based on the VPSA oxygen production technology, the utility model connects the air intake filter element with the compressor positive pressure air intake interface e and the compressor positive pressure exhaust interface i by setting a switching valve. When the control switching valve is in a power-off state, the interface b and the interface c of the switching valve are connected, so that the air intake filter element is connected to the compressor positive pressure air intake interface e, and the VPSA oxygen generator works normally; when the control switching valve is in a power-on state, the interface b and the interface d of the switching valve are connected, so that the air intake filter element is connected to the compressor positive pressure exhaust interface i, and the exhaust air of the compressor will have a cleaning effect on the air intake filter element. Moreover, this cleaning process will be automatically performed every time the VPSA oxygen generator is turned off, so that the air intake filter element will not have too much dust deposition, and can achieve a long service life, or the air intake filter element does not need to be replaced or maintained during the entire service life of the VPSA oxygen generator.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-cleaning system for a VPSA oxygen concentrator, characterized in that: It includes an air intake filter element, a compressor, a molecular sieve A tank body, and a molecular sieve B tank body; a switching valve is arranged between the air intake filter element and the compressor, and the compressor is connected to the air intake filter element through the switching valve; a direct-acting valve is arranged between the compressor and the molecular sieve A tank body and the molecular sieve B tank body, and the compressor is connected to the molecular sieve A tank body and the molecular sieve B tank body respectively through the direct-acting valve.

2. A self-cleaning system for a VPSA oxygen concentrator according to claim 1, characterized in that: The compressor is a four-cylinder compressor, the compressor is provided with a compressor positive pressure air intake interface e, a compressor negative pressure air intake interface h, a compressor negative pressure exhaust interface f, a compressor positive pressure exhaust interface i, the switching valve is provided with interfaces b, c, and d, and the direct-acting valve is provided with interfaces j, k, l, and m; The positive pressure air intake interface e of the compressor is connected to the interface c of the switching valve, the negative pressure air intake interface h of the compressor is connected to the interface k of the direct-acting valve, and the positive pressure exhaust interface i of the compressor is respectively connected to the interface d of the switching valve and the interface j of the direct-acting valve; the interface b of the switching valve is connected to the air intake filter element, and the interface l and interface m of the direct-acting valve are respectively connected to the input and output of the molecular sieve A tank and the molecular sieve B tank.

3. A self-cleaning system for a VPSA oxygen concentrator according to claim 2, characterized in that: The compressor negative pressure exhaust interface f of the compressor is connected to an exhaust tank, and the exhaust tank is an exhaust silencer tank.

4. A self-cleaning system for a VPSA oxygen concentrator according to claim 3, characterized in that: The output ends of the molecular sieve A tank body and the molecular sieve B tank body are commonly connected to an oxygen storage tank.

5. A VPSA oxygen concentrator, characterized in that: A self-cleaning system comprising the VPSA oxygen concentrator according to any one of claims 1 to 4.

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