Electronic flow regulator and oxygen generator

Abstract

The utility model belongs to the field of oxygen generators, and particularly relates to an electronic flow regulator and an oxygen generator, the electronic flow regulator comprises a valve body which comprises a valve port and an air outlet extending from the valve port, a needle valve which is arranged in the valve body and is suitable for axially moving towards the valve port so as to regulate the flow, and a sealing piece is sleeved outside the side wall of the needle valve, the sealing piece moves along with the needle valve to abut against the inner end face of the valve port for sealing. The side wall of the needle valve is sleeved with the sealing piece, the sealing piece abuts against the inner end face of the valve port, damage caused by abutting of the needle valve and the valve port is avoided, meanwhile, the sealing effect of the sealing piece is better, and the air outlet does not leak air any more after sealing.

Description

Technical Field

[0001] The utility model belongs to the field of oxygen generators, and particularly relates to an electronic flow regulator and an oxygen generator. Background Art

[0002] An oxygen generator is a kind of machine for producing oxygen. In traditional small medical molecular sieve oxygen generators and small household health care oxygen generators, the oxygen flow is generally adjusted by driving a needle valve of a flow regulator with a motor. However, the adjustment method of driving the needle valve with a motor uses a metal needle valve and a plastic threaded connection structure as the rotating adjustment main body. The connection between the metal needle valve and the plastic threaded part is realized by the process of placing a metal needle valve insert during injection molding, which has the defect of large concentricity deviation between the needle valve and the mating hole of the valve body. Especially when the oxygen output port needs to be completely closed, its structure adopts a sealing structure in which a metal part completely blocks the plastic valve body hole. Due to the deviation of concentricity and flatness of the mating surface, air leakage problems will occur. If excessive fitting is carried out through the motor torque, it will cause greater damage to the motor and damage the contact surface. If the contact surface is damaged and deformed, air leakage problems will still occur.

[0003] Therefore, it is urgent to design an electronic flow regulator to solve the technical problem that air leakage still occurs at the air outlet after the valve body hole is blocked.

[0004] It should be noted that the above information disclosed in this background art part is only used to understand the background art of the concept of this application, and therefore, it may include information that does not constitute the prior art. Summary of the Utility Model

[0005] The embodiments of the present disclosure at least provide an electronic flow regulator.

[0006] In a first aspect, the embodiments of the present disclosure provide an electronic flow regulator, including: a valve body, including a valve port, and an air outlet extending from the valve port;

[0007] A needle valve is arranged inside the valve body and is adapted to axially move towards the valve port to adjust the flow rate, and a seal is sleeved on the side wall of the needle valve;

[0008] The seal moves with the needle valve and abuts against the inner end face of the valve port for sealing.

[0009] In an optional embodiment, the seal is located at the front section of the needle valve, and an annular mating groove is formed on the end face close to the valve port;

[0010] A small convex ring is arranged at the front section of the needle valve, and the small convex ring is located in the mating groove to push the seal to move together when the needle valve axially moves away from the valve port.

[0011] In an alternative embodiment, a large convex ring is provided at the front section of the needle valve, and the large convex ring abuts against the end face of the sealing member away from the valve port, so as to drive the sealing member to move together when the needle valve moves axially close to the valve port.

[0012] In an alternative embodiment, a sealing ring is further provided in the valve body. The sealing ring is coaxially arranged with the needle valve and is located in the middle section of the needle valve.

[0013] In an alternative embodiment, the electronic flow regulator further includes a driving member, and the driving member is adapted to drive the needle valve to move axially to adjust the flow rate.

[0014] In an alternative embodiment, the needle valve further includes a mating portion integrally provided at the tail end;

[0015] The mating portion is threadedly connected to the valve body;

[0016] The driving member is in transmission connection with the mating portion.

[0017] In an alternative embodiment, a protruding limiting rod is provided on the side wall of the tail section of the mating portion;

[0018] The driving member is provided with a limiting block;

[0019] Wherein, the limiting block corresponds to the limiting rod.

[0020] In a second aspect, an embodiment of the present disclosure further provides an electronic flow regulator, including: a valve body including a valve port;

[0021] A needle valve disposed inside the valve body and having a sealing member;

[0022] A driving member adapted to drive the needle valve to move axially towards the valve port so that the sealing member forms a seal with the inner end face of the valve port.

[0023] In an alternative embodiment, the sealing member is located at the front section of the needle valve; and

[0024] The needle valve further includes a mating portion integrally provided at the tail end;

[0025] The mating portion is threadedly connected to the valve body;

[0026] The driving member is in transmission connection with the mating portion.

[0027] In a third aspect, an embodiment of the present disclosure further provides an oxygen generator, including: the electronic flow regulator as described above;

[0028] The oxygen generator further includes an oxygen generator, and the oxygen outlet of the oxygen generator is communicated with the air inlet of the electronic flow regulator.

[0029] The beneficial effects of the present utility model are as follows. By sleeving a seal on the side wall of the needle valve and using the seal to abut against the inner end face of the valve port, damage caused by the abutment of the needle valve and the valve port is avoided. At the same time, the sealing effect of the seal is stronger, and the air outlet no longer leaks after sealing.

[0030] Other features and advantages of the present utility model will be described in the following specification, and, in part, will be obvious from the specification or understood by implementing the present utility model. The objectives and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the specification, claims, and drawings.

[0031] To make the above objectives, features, and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, provides a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 An exploded schematic diagram of an electronic flow regulator provided by an embodiment of the present disclosure;

[0034] Figure 2 A cross-sectional schematic diagram of an electronic flow regulator provided by an embodiment of the present disclosure.

[0035] In the figure:

[0036] 1. Valve body; 12. Valve port; 13. Air outlet;

[0037] 2. Needle valve; 21. Seal; 22. Fitting groove; 23. Small convex ring; 24. Large convex ring; 25. Fitting portion; 26. Limit rod;

[0038] 3. Sealing ring;

[0039] 4. Driving component;

[0040] 5. Limit block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0042] Upon research, it is found that in the related art, the adjustment method of the motor-driven needle valve uses a metal needle valve and a plastic threaded connection structure as the rotation adjustment main body, and the connection between the metal needle valve and the plastic threaded part is realized through the process of placing a metal needle valve insert during injection molding. There is a defect of a large concentricity deviation between the needle valve and the fitting hole of the valve body. Especially when it is necessary to completely close the oxygen output air port, its structure adopts a sealing structure in which the metal part completely blocks the plastic valve body hole. Due to the deviation of concentricity and the flatness of the meshing surface of this structure, air leakage problems will occur. If excessive fitting is carried out through the motor torque, it will cause greater damage to the motor and damage the contact surface. If the contact surface is damaged and deformed, air leakage problems will still occur.

[0043] Therefore, there is an urgent need to design an electronic flow regulator to solve the above technical problem that air leakage still occurs at the air outlet after the valve body hole is blocked.

[0044] The following will describe in detail some embodiments of the present utility model with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, in the drawings, for the effective description of the technical content, the thickness of the components can be exaggerated or reduced.

[0046] Based on the above research, to solve the above technical problems, with reference to Figure 1 and Figure 2, at least one embodiment provides an electronic flow regulator, comprising: a valve body 1 and a needle valve 2. The valve body 1 is provided with a valve port 12, and an air outlet 13 extends from the valve port 12. The inside of the valve body 1 is adapted to be filled with gas, and the gas is adapted to flow from the valve port 12 to the air outlet 13, and the air outlet 13 is adapted to discharge the gas. The needle valve 2 is arranged inside the valve body 1 and is adapted to axially move towards the valve port 12 to adjust the flow rate. A seal 21 is sleeved on the side wall of the needle valve 2, and the seal 21 is adapted to move together with the needle valve 2. When the seal 21 moves with the needle valve 2 to abut and seal against the inner end face of the valve port 12, the gas inside the valve body 1 can no longer flow out from the valve port 12 at this time, that is, the flow rate is zero at this time. By sleeving the seal 21 on the side wall of the needle valve 2 and using the seal 21 to abut against the inner end face of the valve port 12, the above device avoids damage caused by the abutment of the needle valve 2 and the valve port 12. At the same time, the sealing effect of the seal 21 is stronger, and the air outlet 13 no longer leaks after sealing.

[0047] Referring to Figure 2 , in some embodiments, in order to achieve the effect of adjusting the flow rate, the head of the needle valve 2 and the valve port 12 are matched. Preferably, the head of the needle valve 2 is a conical head. When the needle valve 2 axially moves and the conical head passes through the valve port 12, the gap between the side wall of the conical head and the mating surface of the valve port 12 will change, that is, the space for the gas to flow through the valve port 12 changes to adjust the flow rate. It is worth mentioning that the valve body 1 is also provided with an air inlet, and the air inlet is adapted to fill the inside of the valve body 1 with gas.

[0048] Referring to Figure 2 , in some embodiments, the seal 21 is located at the front section of the needle valve 2. In order to achieve the effect of the seal 21 moving together with the needle valve 2, an annular mating groove 22 is formed on the end face of the seal 21 close to the valve port 12. A small convex ring 23 is arranged at the front section of the needle valve 2, and the small convex ring 23 is located in the mating groove 22 to push the seal 21 to move together when the needle valve 2 axially moves away from the valve port 12. In addition, a large convex ring 24 is also arranged at the front section of the needle valve 2, and the large convex ring 24 abuts against the end face of the seal 21 away from the valve port 12 to push the seal 21 to move together when the needle valve 2 axially moves close to the valve port 12. It should be noted that the length of the above small convex ring 23 in the axial direction of the needle valve 2 is less than the depth of the mating groove 22, which avoids the situation where the small convex ring 23 abuts against the inner end face of the valve port 12 while the seal 21 cannot abut against the inner end face of the valve port 12, and effectively realizes the sealing effect of the seal 21.

[0049] Referring to Figure 2, in some embodiments, in order to prevent the gas in the valve body 1 from leaking from the outlet 13 and the rest outside the inlet, a sealing ring 3 is further provided in the valve body 1. The sealing ring 3 is coaxially arranged with the needle valve 2, and an annular groove is formed on the side wall of the middle section of the needle valve 2. The sealing ring 3 is located in the annular groove and can also move together with the needle valve 2. The sealing ring 3 is suitable for blocking the gap between the valve body 1 and the needle valve 2 to prevent gas from leaking from here. Preferably, the sealing ring 3 is made of silica gel material, which has certain elasticity and good sealing effect.

[0050] Referring to Figure 1 , in some embodiments, the electronic flow regulator further includes a driving component 4, and the driving component 4 is suitable for driving the needle valve 2 to move axially. Specifically, the needle valve 2 further includes a matching part 25 integrally arranged at the tail end. The matching part 25 is threadedly connected with the valve body 1, and the driving component 4 is in transmission connection with the matching part 25; Exemplarily, the driving component 4 can be but is not limited to a stepping motor, a DC motor, etc., and is suitable for driving the matching part 25 to rotate axially, so as to realize the axial movement of the matching part 25 through thread matching, that is, the axial movement of the needle valve 2. It should be noted that the valve body 1 and the driving component 4 are connected by self-tapping screws to prevent the valve body 1 from rotating along with the needle valve 2 when the needle valve 2 rotates axially, resulting in poor axial movement effect of the needle valve 2. It is also worth mentioning that since the above-mentioned matching part 25 is integrally arranged at the tail end of the needle valve 2, the error caused by assembly during split setting is avoided. Therefore, the concentricity between the needle valve 2 and the valve port 12 is more accurate, that is to say, the cooperation of relevant components will be more precise when the valve port 12 needs to be sealed. In addition, preferably, the needle valve 2 (including the tail-end matching part 25) is made of high-strength engineering plastic.

[0051] Referring to Figure 1 , in some embodiments, a protruding limiting rod 26 is provided on the side wall of the tail section of the matching part 25, and a limiting block 5 is provided on the driving component 4. The limiting block 5 corresponds to the limiting rod 26 and is used to limit the rotation of the matching part 25, that is, the number of axial rotation turns of the matching part 25 is less than one turn, so as to avoid the change of the number of steps of the stepping motor after power-off and cause excessive rotation. On the premise of this number of rotation turns, the axial movement distance of the needle valve 2 realized through thread matching is sufficient to realize the adjustment of the flow rate and the sealing effect of the seal 21.

[0052] Referring to Figure 1 and Figure 2, at least one embodiment further provides an electronic flow regulator, comprising: a valve body 1, a needle valve 2 and a driving component 4. The valve body 1 is provided with a valve port 12. The interior of the valve body 1 is adapted to be filled with gas, and the gas is adapted to flow out from the valve port 12. The needle valve 2 is arranged inside the valve body 1 and has a seal 21. The driving component 4 is adapted to drive the needle valve 2 to axially move towards the valve port 12 to adjust the flow rate. The seal 21 is adapted to move together with the needle valve 2. When the seal 21 moves with the needle valve 2 to abut and seal against the inner end face of the valve port 12, at this time, the gas inside the valve body 1 can no longer flow out from the valve port 12, that is, the flow rate is zero at this time.

[0053] Referring to Figure 1 , in some embodiments, the seal 21 is located at the front section of the needle valve 2 for easy sealing, and the needle valve 2 further includes a mating portion 25 integrally provided at the tail end. The mating portion 25 is threadedly connected to the valve body 1, and the driving component 4 is in transmission connection with the mating portion 25 so that when the driving component 4 drives the mating portion 25 to axially rotate, the needle valve 2 realizes the effect of axial movement through threaded cooperation.

[0054] In addition, at least one embodiment further provides an oxygen generator, comprising: the above-mentioned electronic flow regulator. The oxygen generator further includes an oxygen generator, and the oxygen outlet of the oxygen generator is communicated with the air inlet of the electronic flow regulator to realize the flow rate adjustment of the output oxygen.

[0055] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the specific features, structures or characteristics after such phrases can be included in at least one embodiment of the present disclosure. Therefore, the specific features, structures or characteristics can be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, terms such as "example", "exemplary", etc. are used "for the purpose of serving as an example, instance or illustration. Any embodiment, aspect or design described herein as "example" or "exemplary" is not necessarily construed as being preferred or superior to other embodiments, aspects or designs. Instead, the use of terms such as "example", "exemplary", etc. is intended to present concepts in a specific manner.

[0056] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected" shall 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 or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 of the present invention. In addition, terms such as "first", "second" and other numerical terms used herein do not imply an order or sequence unless explicitly indicated in the text. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above may be referred to as the second element, component, region, layer or section.

[0058] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electronic flow regulator, characterized in that: include: The valve body (1) comprises a valve port (12), and an air outlet (13) extends from the valve port (12); A needle valve (2) is arranged inside the valve body (1) and is suitable for axially moving toward the valve port (12) to adjust the flow rate, and a sealing member (21) is provided on the side wall of the needle valve (2); The sealing member (21) moves along with the needle valve (2) until it abuts against the inner end surface of the valve port (12) for sealing.

2. The electronic flow regulator according to claim 1, characterized in that: The sealing member (21) is located at the front section of the needle valve (2), and a circular matching groove (22) is formed on the end surface of the sealing member close to the valve port (12); The front section of the needle valve (2) is provided with a small convex ring (23), and the small convex ring (23) is located in the matching groove (22) so as to push the sealing member (21) to move together when the needle valve (2) moves axially away from the valve port (12).

3. The electronic flow regulator according to claim 1, characterized in that: The front section of the needle valve (2) is provided with a large convex ring (24), and the large convex ring (24) abuts against the end surface of the sealing member (21) away from the valve port (12), so as to push the sealing member (21) to move together when the needle valve (2) moves axially towards the valve port (12).

4. The electronic flow regulator according to claim 1, characterized in that: A sealing ring (3) is also provided in the valve body (1); the sealing ring (3) is coaxially arranged with the needle valve (2) and is located in the middle section of the needle valve (2).

5. The electronic flow regulator according to claim 1, characterized in that: The electronic flow regulator further comprises a driving component (4), wherein the driving component (4) is suitable for driving the needle valve (2) to move axially to adjust the flow rate.

6. The electronic flow regulator according to claim 5, characterized in that: The needle valve (2) further comprises a matching portion (25) integrally arranged at the tail end; The matching portion (25) is threadedly connected to the valve body (1); The driving component (4) is drivingly connected to the matching portion (25).

7. The electronic flow regulator according to claim 6, characterized in that: A protruding limiting rod (26) is provided on the side wall of the tail section of the matching portion (25); The driving component (4) is provided with a limit block (5); Wherein, the limiting block (5) corresponds to the limiting rod (26).

8. An electronic flow regulator, characterized in that: include: A valve body (1) including a valve port (12); A needle valve (2) is arranged inside the valve body (1) and has a sealing member (21); The driving component (4) is suitable for driving the needle valve (2) to move axially toward the valve port (12), so that the sealing component (21) and the inner end surface of the valve port (12) are sealed.

9. The electronic flow regulator according to claim 8, characterized in that: The sealing element (21) is located at the front section of the needle valve (2); and The needle valve (2) further comprises a matching portion (25) integrally arranged at the tail end; The matching portion (25) is threadedly connected to the valve body (1); The driving component (4) is drivingly connected to the matching portion (25).

10. An oxygen concentrator, characterized in that: include: The electronic flow regulator according to any one of claims 1 to 9; The oxygen concentrator also includes an oxygen concentrator; Wherein, the oxygen outlet of the oxygen generator is communicated with the air inlet of the electronic flow regulator.

Images