Diaphragm type noise reduction electromagnetic valve for oxygen generator

Abstract

The diaphragm type noise reduction electromagnetic valve comprises a valve body with a valve cavity, a valve seat and a miniature electromagnetic valve, an air inlet P and an air outlet R are formed in the valve body, at least two pilot airflow channels are arranged in the valve body and the valve seat, one ends of the pilot airflow channels are communicated with the air inlet P and the air outlet R respectively, and the other ends of the pilot airflow channels are communicated with the miniature electromagnetic valve. The other end of the pilot air flow channel is connected with a rear connecting valve cavity through a micro electromagnetic valve and is controlled to be opened or closed based on the micro electromagnetic valve; according to the pilot-operated type diaphragm electromagnetic valve, the air pipe is changed into the air channel in the valve body, installation of external assemblies is reduced, silencing can be achieved through the inner air channel, and the use experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oxygen generator accessory technical field, concretely is a membrane piece formula noise reduction solenoid valve for oxygen generator. BACKGROUND

[0002] Oxygen production solenoid valve is indispensable part of oxygen generator, and its operation capacity directly determines the oxygen production capacity of the whole oxygen generator. Oxygen production solenoid valve generally has direct cut-off type and membrane piece type, wherein, membrane piece type oxygen production solenoid valve is more common.

[0003] The basic principle of oxygen generator membrane piece type solenoid valve is that two solenoid valves are used as pilot valves, the valve body cavity is symmetrically distributed, the upper diaphragm and the lower diaphragm form a linkage assembly, when the first solenoid valve is powered, the gas pressure pushes the linkage assembly to make the upper diaphragm of the left cavity and the valve body sealing profile form end face sealing, the left molecular sieve of the oxygen concentrator is controlled to intake, and the right molecular sieve of the oxygen concentrator is exhausted at the same time; the first circuit is cut off, when the second solenoid valve is powered, the gas pressure pushes the right cavity linkage assembly to make the upper diaphragm and the valve body sealing profile form end face sealing, the left molecular sieve of the oxygen concentrator is exhausted, and the right molecular sieve of the oxygen concentrator is inhaled at the same time, so that the reversing of the gas circuit is realized.

[0004] The existing solenoid valve design has defects, the gas pipe controlled by the micro pilot valve is arranged outside the valve body, which causes gas spouting noise when the pilot valve works, and is not conducive to the use scene of the oxygen generator requiring silent work. INVENTION CONTENTS

[0005] The application provides a membrane piece formula noise reduction solenoid valve for oxygen generator, which is arranged by changing the gas channel into the valve body, so that the installation of external components is reduced, the noise is reduced by using the internal gas channel, and the noise is eliminated.

[0006] The utility scheme provides a membrane piece formula noise reduction solenoid valve for oxygen generator, which comprises a valve body with a valve cavity, a valve seat and a micro solenoid valve, an air inlet P and an exhaust port R are arranged on the valve body, at least two pilot gas flow channels are arranged in the valve body and the valve seat and communicate with the air inlet P and the exhaust port R respectively, the other end of the pilot gas flow channel is connected with the valve cavity through the micro solenoid valve, and the pilot gas flow channel and the corresponding valve cavity are switched on or off by the micro solenoid valve.

[0007] As a further setting of the above scheme, the pilot gas flow channel comprises an air inlet A and an exhaust channel B, one end of the air inlet A is connected with the valve cavity through the micro solenoid valve, the other end is connected with the air inlet P, one end of the exhaust channel B is connected with the valve cavity through the micro solenoid valve, and the other end is connected with the exhaust port R.

[0008] As a further arrangement of the above-mentioned scheme, the micro electromagnetic valve is used for controlling opening or closing of the air inlet A and the air outlet B, and the opening and closing states of the air inlet A and the air outlet B are oppositely arranged.

[0009] As a further arrangement of the above-mentioned scheme, the valve seat is fixed on the valve body, the valve body comprises a valve rod, an upper diaphragm and a lower diaphragm, the valve cavity comprises an upper cavity, a middle cavity and a lower cavity, the upper diaphragm and the lower diaphragm are fixed on both ends of the valve rod and arranged in the upper cavity and the lower cavity, and the upper diaphragm and the lower diaphragm are further used for separating the upper cavity and the lower cavity, and the separated upper cavity comprises a sealed cavity communicated with the air inlet P through a pilot air flow channel and a normally open cavity communicated with the middle cavity.

[0010] As a further arrangement of the above-mentioned scheme, the upper diaphragm is provided with an extension, the upper cavity is further provided with a secondary diaphragm, the secondary diaphragm is used for separating the upper diaphragm, the outer ring of the upper diaphragm and the secondary diaphragm is fixed and pressed by the lower end of the upper valve cover arranged relative to the upper cavity, and the lower diaphragm is provided with a diaphragm hole.

[0011] As a further arrangement of the above-mentioned scheme, the air outlet B is provided with a plurality of channel openings connected with the micro electromagnetic valve, and the openings of the air inlet A and the air outlet B are closed by steel caps.

[0012] Technical effect: the pilot diaphragm electromagnetic valve has the advantages that the air channel is arranged in the valve body, the installation of external components is reduced, the noise is reduced by using the internal air channel, and the use experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0014] Figure 1 It is a pilot diaphragm electromagnetic valve structure diagram of the utility model.

[0015] Figure 2 It is a pilot diaphragm electromagnetic valve internal structure diagram of the utility model

[0016] Figure 3 It is a pilot diaphragm electromagnetic valve section view diagram of the embodiment.

[0017] Figure 4 It is a pilot diaphragm electromagnetic valve section view diagram of the embodiment.

[0018] Figure 5 It is the intake state valve stem film flap action schematic view of the embodiment.

[0019] Figure 6 It is the internal airway vertical section schematic view of the embodiment.

[0020] Figure 7 It is the internal airway horizontal section schematic view of the embodiment.

[0021] Mark for explanation: 1, valve body; 11, air inlet P; 12, exhaust port R; 2, valve seat; 3, pilot air flow channel; 31, air inlet A; 32, exhaust channel B; 38, steel cap; 4, valve cavity; 41, upper flap cavity; 411, closed cavity; 412, normally open cavity; 42, middle cavity; 43, lower flap cavity; 47, outer snap spring; 48, upper valve cover; 49, lower valve cover; 5, valve stem; 51, upper film flap; 511, extension; 52, lower film flap; 53, auxiliary flap; 9, miniature electromagnetic valve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] As Figures 1-7 The utility model discloses a diaphragm formula noise reduction electromagnetic valve for oxygen generator, including the valve body 1 with valve cavity 4, valve seat 2 and miniature electromagnetic valve 9, the valve body 1 is provided with air inlet P11 and exhaust port R12, the valve body 1 and valve seat 2 at least have two one ends respectively with the pilot air flow channel 3 of air inlet P11 and exhaust port R12 intercommunication, the other end of pilot air flow channel 3 is connected with valve cavity 4 through miniature electromagnetic valve 9 respectively, and through miniature electromagnetic valve 9 control pilot air flow channel 3 and corresponding valve cavity 4 open or close intercommunication switching.

[0024] Further, the valve seat 2 of the embodiment is bolted on the valve body 1, the valve body 1 includes valve stem 5, upper film flap 51 and lower film flap 52, the valve cavity 4 includes upper flap cavity 41, middle cavity 42 and lower flap cavity 43, the upper film flap 51 and lower film flap 52 are fixed at both ends of valve stem 5 and are arranged in upper flap cavity 41 and lower flap cavity 43, and the upper film flap 51 and lower film flap 52 are also used to separate upper flap cavity 41 and lower flap cavity 43, and the separated upper flap cavity 41 includes closed cavity 411 corresponding to air inlet P11 through pilot air flow channel 3 and normally open cavity 412 communicating with middle cavity 42.

[0025] Furthermore, the upper diaphragm flap 51 of the present embodiment is provided with an extension portion 511, and a side flap 53 is further provided in the upper flap chamber 41. The side flap 53 is used to cooperate with the upper diaphragm flap 51 to separate the upper diaphragm flap 51. The lower end of the upper valve cover 48 provided in the valve chamber 4 is fixed to press the outer ring of the upper diaphragm flap 51 and the side flap 53 relative to the upper flap chamber 41. The lower valve cover 49 provided in the valve chamber 4 is fixed to the valve body 1 by an external retaining spring 47. The lower diaphragm flap 52 is provided with a diaphragm flap hole 521. The upper diaphragm flap 51 of the present embodiment is provided with an extension portion 511. The extension portion 511 is used for stretching the upper diaphragm flap 51 when the valve stem 5, the upper diaphragm flap 51 and the lower diaphragm flap 52 are moved. The lower diaphragm flap 52 is provided with a diaphragm flap hole 521 to provide elastic force for convenient stretching of the lower diaphragm flap 52 and facilitate the connection of the internal airway.

[0026] Furthermore, the pilot air flow channel 3 of this embodiment includes an air intake channel A31 and an exhaust channel B32. One end of the air intake channel A31 is connected to the valve chamber 4 through a micro solenoid valve 9, and the other end is connected to the air intake port P11. One end of the exhaust channel B32 is connected to the valve chamber 4 through a micro solenoid valve 9, and the other end is connected to the exhaust port R12. The micro solenoid valve 9 of this embodiment is used to control the opening or closing of the air intake channel A31 and the exhaust channel B32, and the opening and closing states of the air intake channel A31 and the exhaust channel B32 are opposite, that is, under the switching of the micro solenoid valve 9, when the air path of the air intake channel A31 is open, the exhaust channel B32 is closed, and conversely, when the air intake channel A31 is closed, the exhaust channel B32 is open.

[0027] Furthermore, the exhaust passage B32 of this embodiment is provided with a plurality of channel openings connected to the micro solenoid valve 9, and steel caps 38 are provided at the openings of the intake passage A31 and the exhaust passage B32 for sealing.

[0028] As described above, a diaphragm type noise reduction solenoid valve for an oxygen concentrator in this embodiment, wherein Figures 1-2 The figure shows a valve body 1 with a valve cavity 4, a valve seat 2 and a micro solenoid valve 9. The valve body 1 is provided with an air inlet P11, an exhaust port R12 and two air outlets. The air outlet is normally open and connected to the middle cavity 42. There are at least two pilot air channels 3 in the valve body 1 and the valve seat 2, one end of which is connected to the air inlet P11 and the exhaust port R12 respectively. The other end of the pilot air channel 3 is connected to the valve cavity 4 through the micro solenoid valve 9, and the valve state is switched based on the opening or closing control of the micro solenoid valve 9.

[0029] The working principle of the pilot-operated diaphragm solenoid valve of the present embodiment is as follows: the two air outlets are respectively connected to the molecular sieve beds, the air inlet P11 is connected to the air source, and the micro-solenoid valve 9 is used to open the connection between the air inlet A31 on the left or right side and the closed cavity 411. Driven by the air pressure, the upper diaphragm 51 on the corresponding side drives the valve stem 5 and the lower diaphragm 52 to move downward, thereby opening the connection between the air inlet P11 and the middle cavity 42, so that the air inlet P11 is directly connected to the air outlet (the other side is reversely closed to close the airway). Figure 4 As shown, the micro-solenoid valve 9 switches its working state to connect the air outlet B32 with the closed chamber 411, so that the air source and the closed chamber 411 are no longer connected. After the air pressure of the air source is lost, the high pressure of the closed chamber 411 is released, and then the normally open chamber 412 on the other side of the upper diaphragm 51 is pushed toward the closed chamber 411 by the air pressure, pushing the upper diaphragm 51 to move upward with the valve stem 5 and the lower diaphragm 52, as shown in FIG. Figure 5 The shown figure switches the internal structural working state;

[0030] It is worth noting that the upper and lower membrane flaps 51 and 52 can avoid damage to the membrane sheet due to excessive stretching when the upper and lower membrane flaps 51 and 52 move through the arrangement of the extension portion 511 and the membrane flap hole 521. Figures 4-5 The arrangement of the air inlet P11 and the lower mold cavity 43 and the arrangement of the membrane flap hole 521 on the lower membrane flap 52 make Figure 4 In the open state, the airflow entering from the air inlet P11 directly enters the middle cavity 42 from the lower mold cavity 43 above the lower membrane flap 52 and flows to the air outlet. Under the control of the micro electromagnetic valve 9, the valve state is switched to Figure 5 At this time, the lower membrane flap 52 is driven by the valve stem 5 to move upward, closing the passage of the air inlet A31 of the air inlet P11 directly connected to the middle cavity 42, and then entering the lower membrane cavity 43 relative to the lower membrane flap 52 from the membrane flap hole 521. When the lower membrane flap 52 blocks and isolates the lower membrane cavity 43 from the middle cavity 42, it can also provide a certain pressure to enhance the sealing strength of the lower membrane flap 52 to the middle cavity 42.

[0031] In summary, the pilot-operated diaphragm solenoid valve of the present embodiment has a pipeline for inlet and outlet air both from the inside of the valve body 1. Compared with the prior art solution of using the air pipe from the outside, the pilot internal airway solution of the present embodiment can reduce the arrangement of structural accessories such as the air pipe and seals, thereby avoiding entanglement and damage of the air pipe accessories causing leakage and usage problems. Secondly, the exhaust duct B is connected to the exhaust port R, so that the pilot airflow flows out from the exhaust port R, which can reduce the noise of the airflow and mute its airflow sound, and is relatively more suitable for the silent and quiet use environment of the oxygen concentrator.

[0032] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A diaphragm type noise reduction electromagnetic valve for an oxygen generator, comprising a valve body (1) with a valve cavity (4), a valve seat (2) and a micro electromagnetic valve (9), characterized in that: The valve body (1) is provided with an air inlet P (11) and an exhaust port R (12), and at least two pilot air flow channels (3) are arranged in the valve body (1) and the valve seat (2), one end of each pilot air flow channel (3) is communicated with the air inlet P (11) and the exhaust port R (12) respectively, the other end of each pilot air flow channel (3) is connected with the valve cavity (4) through the micro electromagnetic valve (9), and the pilot air flow channel (3) is switched between opening and closing communication with the corresponding valve cavity (4) through the micro electromagnetic valve (9).

2. The diaphragm type noise reduction electromagnetic valve for an oxygen generator according to claim 1, characterized in that: The pilot air flow channel (3) includes an air inlet A (31) and an exhaust channel B (32), one end of the air inlet A (31) is communicated with the valve cavity (4) through the micro electromagnetic valve (9), and the other end is connected with the air inlet P (11), one end of the exhaust channel B (32) is communicated with the valve cavity (4) through the micro electromagnetic valve (9), and the other end is connected with the exhaust port R (12).

3. The diaphragm type noise reduction electromagnetic valve for an oxygen generator according to claim 1, characterized in that: The micro electromagnetic valve (9) is used for controlling the opening and closing of the air inlet A (31) and the exhaust channel B (32), and the opening and closing states of the air inlet A (31) and the exhaust channel B (32) are oppositely arranged.

4. The diaphragm type noise reduction electromagnetic valve for an oxygen generator according to claim 1, characterized in that: The valve seat (2) is bolted on the valve body (1), the valve body (1) includes a valve rod (5), an upper membrane flap (51) and a lower membrane flap (52), the valve cavity (4) includes an upper flap cavity (41), a middle cavity (42) and a lower flap cavity (43), the upper membrane flap (51) and the lower membrane flap (52) are fixed at both ends of the valve rod (5) and arranged in the upper flap cavity (41) and the lower flap cavity (43), and the upper membrane flap (51) and the lower membrane flap (52) are also used for separating the upper flap cavity (41) and the lower flap cavity (43), and the separated upper flap cavity (41) includes a sealed cavity (411) communicated with the air inlet P (11) through the pilot air flow channel (3) and a normally open cavity (412) communicated with the middle cavity (42).

5. The diaphragm type noise reduction electromagnetic valve for an oxygen generator according to claim 4, characterized in that: The upper membrane flap (51) is provided with an extension (511), and a secondary flap (53) is arranged in the upper flap cavity (41), and the secondary flap (53) is used for separating the upper membrane flap (51).

6. The diaphragm type noise reduction electromagnetic valve for an oxygen generator according to claim 5, characterized in that: The upper valve cover (48) arranged opposite to the upper flap cavity (41) of the valve cavity (4) is fixed to compress the outer ring of the upper membrane flap (51) and the secondary flap (53), the lower valve cover (49) arranged opposite to the lower flap cavity (43) is fixed on the valve body (1) by using an outer snap spring (47), and the lower membrane flap (52) is provided with a membrane flap hole (521).

7. The diaphragm type noise reduction electromagnetic valve for an oxygen generator according to claim 3, characterized in that: The exhaust channel B (32) is provided with a plurality of channel ports connected with the micro electromagnetic valve (9), and the openings of the air inlet A (31) and the exhaust channel B (32) are provided with steel caps (38) for closing.

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