Rotary air distribution valve

Abstract

The utility model relates to the technical field of air distribution valves, in particular to a rotary air distribution valve. Comprising a rotating motor, a ceramic rotating body, a first control valve body and a second control valve body, the rotating motor is arranged on the first control valve body, the output end of the rotating motor is connected with the ceramic rotating body, the first control valve body is connected with the second control valve body, the first control valve body is provided with a gas inlet, and the second control valve body is provided with a nitrogen discharge port and a first gas outlet. The ceramic rotating body is provided with an air inlet channel and an exhaust channel. The ceramic rotating body is controlled to rotate through the rotating motor, and whether the air inlet, the first air outlet and the exhaust port are communicated or not is controlled, so that intermittent air supply and exhaust are performed on the molecular sieve tower connected with the first air outlet. Compared with the technical scheme that the on-off of gas is controlled through an electromagnetic valve, the structure is simple and reliable, large pre-pressing is not needed during starting, and noise is low.

Description

Technical Field

[0001] This utility model relates to the field of gas distribution valve technology, specifically to a rotary gas distribution valve. Background Technology

[0002] Currently, most oxygen concentrators on the market utilize the pressure swing adsorption (PSA) principle, using molecular sieves as adsorbents and air as the raw material to produce oxygen-enriched products. Most existing oxygen concentrators control the gas flow through solenoid valves. The drawbacks of this technology are: high noise levels, complex structure, and the need for pre-pressurization during startup. In high-altitude, thin-air areas, insufficient pre-pressurization may prevent startup. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a rotary gas distribution valve for oxygen generators that is simple in structure, low in cost, safe and reliable.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A rotary gas distribution valve includes a rotary motor, a ceramic rotor, a first control valve body, and a second control valve body. The rotary motor is mounted on the first control valve body, and its output end is connected to the ceramic rotor. The first control valve body is connected to the second control valve body. The first control valve body is provided with an air inlet, and the second control valve body is provided with a nitrogen vent and a first air outlet. The ceramic rotor is provided with an air inlet passage and an air outlet passage.

[0006] When the ceramic rotor rotates to the first position, the air inlet and the first air outlet are connected through the air inlet channel, and the first air outlet is not connected to the nitrogen exhaust port.

[0007] When the ceramic rotor rotates to the second position, the air inlet is not connected to the first air outlet, and the first air outlet is connected to the nitrogen exhaust port through the exhaust channel.

[0008] Optionally, the second control valve body is further provided with a second air outlet;

[0009] When the ceramic rotor rotates to the first position, the air inlet and the first air outlet are connected through the air inlet channel, and the second air outlet and the nitrogen exhaust port are connected through the exhaust channel.

[0010] When the ceramic rotor rotates to the second position, the air inlet and the second air outlet are connected through the air inlet channel, and the first air outlet and the nitrogen exhaust port are connected through the exhaust channel.

[0011] Optionally, the output end of the rotary motor is connected to the ceramic rotor via an adjusting block, the adjusting block is slidably connected to the ceramic rotor, and an elastic clamping member is provided between the adjusting block and the ceramic rotor to press the ceramic rotor against the inner wall of the second control valve.

[0012] Optionally, the elastic clamping element is a spring.

[0013] Optionally, the first control valve is further provided with at least one functional port.

[0014] The function port is used to input other gases or gases containing droplets.

[0015] Optionally, both the nitrogen vent and the first air outlet are located at the bottom of the second control valve body.

[0016] Optionally, a pad is also provided between the bottom of the second control valve and the ceramic rotor.

[0017] Optionally, the thickness of the pad is a, and the distance from the bottom of the second control valve body to the connection point between the second control valve body and the first control valve is b, where a > b.

[0018] Optionally, the pad is further provided with a sealing ring, the upper surface of which corresponds to the protrusion of the inner wall of the first control valve body, the lower surface of which corresponds to the upper surface of the pad, and the upper surface of the pad is further provided with a positioning groove corresponding to the sealing ring.

[0019] Optionally, a sealing patch is also provided between the pad and the second control valve body.

[0020] Adding additional gaskets to the first and second control valve bodies creates a double-sealing effect. Gas within the first and second control valve bodies is sealed by the sealing ring, gasket, and sealing patch as the first layer of sealing. The connection between the first and second control valve bodies serves as the second layer of sealing. While ensuring a good seal, only the precision of the gasket needs to be guaranteed, thus reducing the precision requirements at the connection between the first and second control valve bodies and lowering component manufacturing costs.

[0021] The beneficial technical effects of this utility model are as follows: by controlling the rotation of the ceramic rotor with a rotary motor, the connection between the air inlet, the first air outlet, and the exhaust port is controlled, thereby intermittently supplying and exhausting gas to the molecular sieve tower connected to the first air outlet. Compared with the technical solution of controlling the gas flow through a solenoid valve, the structure is simpler and more reliable, does not require a large pre-pressure during startup, and has lower noise. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the ceramic rotating body and the pad in this utility model;

[0026] Figure 5 This is a schematic diagram showing the relative positional relationship between the ceramic rotor and the pad when the ceramic rotor is in the first position in this utility model.

[0027] Figure 6 This is a schematic diagram showing the relative positional relationship between the ceramic rotor and the pad when the ceramic rotor is in the second position in this utility model.

[0028] Reference numerals in the attached diagram: 1-Rotary motor, 2-Ceramic rotor, 3-First control valve body, 4-Padded block, 5-Second control valve body, 6-Air inlet, 7-Function port, 8-First air outlet, 9-Second air outlet, 10-Nitrogen vent, 11-Air inlet channel, 12-Exhaust channel. 13-Adjusting block, 14-Spring, 15-Sealing ring, 16-Sealing patch. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0030] Reference Figure 1-4 As shown, a rotary air distribution valve includes a rotary motor 1, a ceramic rotor 2, a first control valve body 3, a pad 4, and a second control valve body 5.

[0031] A rotary motor 1 is mounted on the first control valve body 3. The output end of the rotary motor 1 is connected to the ceramic rotor 2. The first control valve body 3 and the second control valve body 5 are fixedly connected by bolts. The first control valve body 3 is provided with an air inlet 6 and a functional port 7 on its opposite side. The second control valve body 5 is provided with a nitrogen vent 10, a first air outlet 8, and a second air outlet 9. The ceramic rotor 2 is provided with an air inlet channel 11 and an air outlet channel 12. The nitrogen vent 10 and the first air outlet 8 are both located at the bottom of the second control valve body 5.

[0032] The output end of the rotary motor 1 is connected to the ceramic rotating body 2 through the adjusting block 13. The adjusting block 13 is slidably connected to the ceramic rotating body 2. A spring 14 is also provided between the adjusting block 13 and the ceramic rotating body 2 to press the ceramic rotating body 2 onto the pad block 4.

[0033] A spacer block 4 is located between the ceramic rotor 2 and the second control valve body 5. The spacer block 4 has channels corresponding to the nitrogen vent 10, the first air outlet 8, and the second air outlet 9. A sealing ring 15 is also provided on the spacer block 4. The upper surface of the sealing ring 15 corresponds to the protrusion on the inner wall of the first control valve body 3, and the lower surface of the sealing ring 15 corresponds to the upper surface of the spacer block 4. A positioning groove corresponding to the sealing ring 15 is also provided on the upper surface of the spacer block 4. A sealing patch 16 is also provided between the spacer block 4 and the second control valve body 5. The thickness of the spacer block 4 is 'a', and the distance from the bottom of the second control valve body 5 to the connection point between the second control valve body 5 and the first control valve body 3 is 'b', where 'a' is slightly greater than 'b'.

[0034] Adding an additional gasket 4 to the first control valve body 3 and the second control valve body 5 creates a double sealing effect. The gas inside the first control valve body 3 and the second control valve body 5 is sealed by the sealing ring 15, the gasket 4, and the sealing patch 16 as the first layer of sealing. The connection between the first control valve body 3 and the second control valve body 5 serves as the second layer of sealing. While ensuring the sealing effect, only the precision of the gasket 4 needs to be guaranteed, thereby reducing the precision requirements at the connection between the first control valve body 3 and the second control valve body 5 and reducing component manufacturing costs.

[0035] During use, air enters the cavity inside the first control valve body 3 through the air inlet 6, as shown in the reference. Figure 5 As shown, when the ceramic rotor 2 rotates to the first position, the air inlet 6 is only connected to the first air outlet 8 through the air inlet channel 11, and the second air outlet 9 is only connected to the nitrogen exhaust port 10 through the exhaust channel 12.

[0036] Reference Figure 6 As shown, when the ceramic rotor 2 rotates to the second position, the air inlet 6 is only connected to the second air outlet 9 through the air inlet channel 11, and the first air outlet 8 is only connected to the nitrogen exhaust port 10 through the exhaust channel 12.

[0037] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A rotary gas distribution valve, characterized in that: It includes a rotary motor, a ceramic rotor, a first control valve body, and a second control valve body. The rotary motor is mounted on the first control valve body, and its output end is connected to the ceramic rotor body. The first control valve body is connected to the second control valve body. The first control valve body is provided with an air inlet, and the second control valve body is provided with a nitrogen vent and a first air outlet. The ceramic rotor body is provided with an air inlet channel and an air outlet channel. When the ceramic rotor rotates to the first position, the air inlet and the first air outlet are connected through the air inlet channel, and the first air outlet is not connected to the nitrogen exhaust port. When the ceramic rotor rotates to the second position, the air inlet is not connected to the first air outlet, and the first air outlet is connected to the nitrogen exhaust port through the exhaust channel.

2. A rotary gas distribution valve according to claim 1, characterized in that: The second control valve body is also provided with a second air outlet; When the ceramic rotor rotates to the first position, the air inlet and the first air outlet are connected through the air inlet channel, and the second air outlet and the nitrogen exhaust port are connected through the exhaust channel. When the ceramic rotor rotates to the second position, the air inlet and the second air outlet are connected through the air inlet channel, and the first air outlet and the nitrogen exhaust port are connected through the exhaust channel.

3. A rotary gas distribution valve according to claim 1, characterized in that: The output end of the rotary motor is connected to the ceramic rotor via an adjusting block. The adjusting block is slidably connected to the ceramic rotor. An elastic clamping member is also provided between the adjusting block and the ceramic rotor to press the ceramic rotor against the inner wall of the second control valve.

4. A rotary gas distribution valve according to claim 3, characterized in that: The elastic clamping element is a spring.

5. A rotary gas distribution valve according to claim 4, characterized in that: The first control valve is also provided with at least one function port.

6. A rotary gas distribution valve according to any one of claims 1-5, characterized in that: Both the nitrogen vent and the first air outlet are located at the bottom of the second control valve body.

7. A rotary gas distribution valve according to claim 6, characterized in that: A pad is also provided between the bottom of the second control valve and the ceramic rotor.

8. A rotary gas distribution valve according to claim 7, characterized in that, The thickness of the pad is a, and the distance from the bottom of the second control valve body to the connection point between the second control valve body and the first control valve is b, where a > b.

9. A rotary air distribution valve according to claim 8, characterized in that, The pad is also provided with a sealing ring, the upper surface of which corresponds to the protrusion of the inner wall of the first control valve body, the lower surface of which corresponds to the upper surface of the pad, and the upper surface of the pad is also provided with a positioning groove corresponding to the sealing ring.

10. A rotary air distribution valve according to claim 8, characterized in that... A sealing patch is also provided between the pad and the second control valve body.

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