Solenoid valve for oxygen generator and oxygen generator

Abstract

The embodiment of the utility model provides an electromagnetic valve for an oxygen generator, and the electromagnetic valve comprises a cylindrical valve body which is provided with an air inlet hole, a first working hole, a second working hole, a first exhaust hole and a second exhaust hole; the spring is located in the valve body and fixed to the bottom of the valve body; the valve core is positioned in the valve body and is connected with the spring; the electrified coil is positioned in the valve body and is positioned at the opening end of the valve body; the valve element is provided with a shaft part and three partition plates which are arranged at the two ends and the middle of the shaft part respectively and are the same in thickness, the partition plates make contact with the inner wall of the valve body, and sealing rings are arranged on the portions, making contact with the inner wall of the valve body, of the partition plates. Therefore, the processes of pressurization, pressure equalization, pressure reduction and nitrogen removal of the two molecular sieve cylinders can be controlled only by using one electromagnetic valve, the integration level and the reaction speed of the electromagnetic valve for the oxygen generator are further improved, the size is small, the cost is low, operation is easy, the oxygen generator is miniaturized, and the portability of the oxygen generator is improved.

Description

Technical Field

[0001] The present application relates to the field of oxygen concentrators, and in particular to a solenoid valve for an oxygen concentrator. Background Art

[0002] When the existing oxygen generator switches the gas path during the oxygen production process, it is necessary to use a solenoid valve to control the two molecular sieve cylinders to pressurize, equalize, reduce pressure, and exhaust nitrogen.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Utility Model Content

[0004] The inventors found that a two-position four-way solenoid valve is usually used in existing oxygen concentrators with a capacity of 3L and 5L, but its structure is complex, the volume is large, and the cost is high.

[0005] In addition, in the existing portable oxygen concentrators, at least 2 to 3 solenoid valves are required to respectively control the pressurization, pressure equalization, pressure reduction, nitrogen exhaust and other processes of the two molecular sieve cylinders. However, due to the large number of valve bodies used, it is easy to cause waste of space and cost.

[0006] In order to solve at least one of the above problems or other similar problems, the embodiments of the present application provide a solenoid valve for an oxygen concentrator and an oxygen concentrator that are highly integrated and easier to control.

[0007] According to a first aspect of an embodiment of the present application, a solenoid valve for an oxygen concentrator is provided, the solenoid valve comprising:

[0008] The valve body is cylindrical and is provided with an air inlet, a first working hole, a second working hole, a first exhaust hole, and a second exhaust hole;

[0009] a spring, which is located in the valve body and fixed to the bottom of the valve body;

[0010] a valve core, which is located in the valve body and connected to the spring; and

[0011] an energized coil located within the valve body and at an open end of the valve body;

[0012] The valve core has a shaft and three partitions of the same thickness respectively arranged at both ends and in the middle of the shaft, the partitions are in contact with the inner wall of the valve body, and the portion of the partitions in contact with the inner wall of the valve body is provided with a sealing ring.

[0013] According to a second aspect of the embodiment of the present application, the first working hole and the second working hole are arranged on one side of the valve body wall, the first exhaust hole and the second exhaust hole are arranged on the other side of the valve body wall opposite to the first working hole and the second working hole, and the air inlet hole is arranged on the one side or the other side;

[0014] Wherein, the air inlet hole is arranged between the first working hole and the second working hole, or the air inlet hole is arranged between the first exhaust hole and the second exhaust hole;

[0015] Wherein, the air inlet hole is arranged on a cross section located exactly in the middle of the first working hole and the second working hole in the horizontal direction.

[0016] According to a third aspect of the embodiment of the present application, a first groove is provided along the entire circumference of the partition in the thickness direction, and the sealing ring is located in the first groove.

[0017] According to a fourth aspect of the embodiment of the present application, the thickness of the partition is equal to or slightly larger than the apertures of the first working hole, the second working hole, the first exhaust hole, and the second exhaust hole, and smaller than the aperture of the air inlet hole.

[0018] According to a fifth aspect of the embodiment of the present application, the solenoid valve satisfies the following position relationship:

[0019] The distance between the center of the first working hole and the center of the second working hole is greater than or equal to the sum of the diameter of the air inlet hole, twice the thickness of the partition plate, 1 / 2 of the diameter of the first working hole, and 1 / 2 of the diameter of the second working hole;

[0020] The interval between the partitions is greater than or equal to the horizontal distance between the first working hole and the first exhaust hole;

[0021] The interval between the partitions is also greater than or equal to the horizontal distance between the first working hole and the air inlet hole;

[0022] The distance between the air inlet and the first exhaust hole and the second exhaust hole is equal, and is equal to the spacing between the partitions plus the thickness of the partition minus the diameter of the first exhaust hole. According to the sixth aspect of the embodiment of the present application, the solenoid valve has three gears: a first gear, a second gear, and a third gear, wherein:

[0023] When the energized coil is energized and the valve core is attracted by the energized energized coil, the solenoid valve is in the first gear position and the spring is in a stretched state;

[0024] When the energized coil is energized and the valve core is repelled by the energized energized coil, the solenoid valve is in the second gear position and the spring is in a compressed state;

[0025] When the energized coil is energized and the middle partition of the valve core coincides with the position of the air inlet P, the solenoid valve is in the third gear, and there is a gap between the two sides of the middle partition and the air inlet P, and the spring is in a free expansion and contraction state.

[0026] According to the seventh aspect of the embodiment of the present application,

[0027] When the valve core is in the first gear position, the first working hole and the first exhaust hole form a first channel, and the air intake hole and the second working hole form a second channel; the solenoid valve exhausts air through the first channel to reduce pressure, and intakes air through the second channel to increase pressure;

[0028] When the valve core is in the second gear position, the air intake hole and the first working hole form a third channel, and the second working hole and the second exhaust hole form a fourth channel; the solenoid valve takes in air through the third channel to increase pressure, and exhausts air through the fourth channel to reduce pressure;

[0029] When the valve core is in the third gear, the air inlet hole and the first working hole form a fifth channel, and the air inlet hole and the second working hole form a sixth channel; the solenoid valve exchanges air and balances pressure through the fifth channel and the sixth channel.

[0030] According to an eighth aspect of the embodiment of the present application, the air inlet is arranged between the first exhaust hole and the second exhaust hole, the valve body of the solenoid valve is further provided with a second groove, and the second groove is arranged between the first working hole and the second working hole, at a position opposite to the air inlet;

[0031] Wherein, the diameter of the second groove is greater than or equal to the thickness of the partition of the valve core.

[0032] According to a ninth aspect of the embodiment of the present application, the solenoid valve has three gears: a first gear, a second gear, and a third gear, wherein:

[0033] When the energized coil is energized and the valve core is attracted by the energized energized coil, the solenoid valve is in the first gear position and the spring is in a stretched state;

[0034] When the energized coil is energized and the valve core is repelled by the energized energized coil, the solenoid valve is in the second gear position and the spring is in a compressed state;

[0035] When the energized coil is energized and the middle partition of the valve core coincides with the position of the air inlet hole and the second groove, the solenoid valve is in the third gear, and there are gaps between the two sides of the middle partition and the air inlet hole and the second groove, and the spring is in a free expansion and contraction state.

[0036] According to a tenth aspect of the embodiment of the present application, when the valve core is in the first gear position, the first working hole and the first exhaust hole form a first channel, and the air intake hole and the second working hole form a second channel; the solenoid valve exhausts air through the first channel to reduce pressure, and intakes air through the second channel to increase pressure;

[0037] When the valve core is in the second gear position, the air intake hole and the first working hole form a third channel, and the second working hole and the second exhaust hole form a fourth channel; the solenoid valve takes in air through the third channel to increase pressure, and exhausts air through the fourth channel to reduce pressure;

[0038] When the valve core is in the third gear, the air inlet hole and the first working hole form a fifth channel, the air inlet hole and the second working hole form a sixth channel, and the gaps between the middle partition and the two sides of the second groove form a seventh channel; the solenoid valve exchanges air and balances the pressure through the fifth channel, the sixth channel and the seventh channel.

[0039] According to the eleventh aspect of the embodiment of the present application, the first working hole and the second working hole are respectively connected to the molecular sieve cartridge; and the air inlet is connected to the compressor.

[0040] One of the beneficial effects of the embodiment of the present application is that: according to the solenoid valve for the oxygen concentrator provided by the embodiment of the present application, only one solenoid valve can be used to complete the process of controlling the pressurization, pressure equalization, pressure reduction, and nitrogen discharge of two molecular sieve cylinders. This improves the integration and reaction speed of the solenoid valve for the oxygen concentrator, and the volume is small, the cost is low, and it is easy to operate, thereby miniaturizing the oxygen concentrator and improving the portability of the oxygen concentrator.

[0041] With reference to the following description and accompanying drawings, the specific embodiments of the present application are disclosed in detail, indicating the way in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope. Within the scope of the spirit and clauses of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.

[0042] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0043] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0045] Figure 1 is a schematic diagram of the structure of the solenoid valve of an embodiment of the present application;

[0046] Figure 2 is a schematic diagram of a valve body of a solenoid valve according to an embodiment of the present application;

[0047] Figure 3 is a schematic diagram of a valve core of a solenoid valve according to an embodiment of the present application;

[0048] Figure 4 is a schematic diagram of the solenoid valve of the embodiment of the present application being located in the first gear position;

[0049] Figure 5 is a schematic diagram of the solenoid valve of the embodiment of the present application being located in the second gear position;

[0050] Figure 6 is a schematic diagram of the solenoid valve of the embodiment of the present application being located in the third gear position;

[0051] Figure 7 It is a schematic diagram of the distances between the various holes provided in the solenoid valve of the embodiment of the present application. DETAILED DESCRIPTION

[0052] With reference to the accompanying drawings, the above and other features of the present application will become apparent through the following description. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the attached claims.

[0053] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or temporal order of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0054] In the embodiments of the present application, the singular forms "a", "the", etc. may include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0055] The implementation of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0056] Embodiments of the first aspect

[0057] The embodiment of the present application provides a solenoid valve 100 for an oxygen concentrator. Figure 1 1 is a schematic diagram of the structure of the solenoid valve 100 according to an embodiment of the present application; Figure 1 As shown, the solenoid valve 100 includes: a valve body 101 , a spring 102 , a valve core 103 , and an energized coil 104 .

[0058] Figure 2 is a schematic diagram of the cross-section structure of the valve body 101 of the solenoid valve 100 of the embodiment of the present application, as shown in Figure 1 and Figure 2 As shown, the valve body 101 is cylindrical, and one side of the valve body 101 in the horizontal direction as shown in the figure (the right side as shown in the figure) is a closed bottom, and the other side (the left side as shown in the figure) is an open end, and an air inlet hole P, a first working hole A, a second working hole B, a first exhaust hole C, and a second exhaust hole D are provided on the wall of the valve body 101, that is, the cylindrical surface.

[0059] In the embodiment of the present application, the first working hole A and the second working hole B are arranged on one side of the wall of the valve body 101 in the vertical direction as shown in the figure (the upper side shown in the figure), and the first exhaust hole C and the second exhaust hole D are arranged on the other side opposite to the first working hole A and the second working hole B (the lower side shown in the figure). Specifically, in order to form an airway, the first working hole A and the second working hole B and the first exhaust hole C and the second exhaust hole D are arranged at positions opposite to each other in the vertical direction of the wall of the valve body 101, and the air inlet P is arranged on the above-mentioned one side (the upper side shown in the figure) or the above-mentioned other side (the lower side shown in the figure). In the above embodiment, Figure 1 and Figure 2 As shown, the air inlet hole P is disposed between the first exhaust hole C and the second exhaust hole D as an example, but the air inlet hole P can also be disposed between the first working hole A and the second working hole B.

[0060] In some embodiments, Figure 1 , 2 As shown, the air inlet P is arranged between the first exhaust hole C and the second exhaust hole D, and a groove N (second groove) is further arranged between the first working hole A and the second working hole B. The groove N is arranged on the valve body 101 and is formed as a closed groove with an opening toward the inside of the valve body 101. The specific function of the groove N will be described in detail in the following content.

[0061] In the above embodiment, if Figure 1 As shown, the first working hole A, the second working hole B and the first exhaust hole C, the second exhaust hole D have the same aperture, and the aperture of the air inlet hole P is slightly larger than the apertures of the first working hole A, the second working hole B and the first exhaust hole C, the second exhaust hole D.

[0062] like Figure 1 As shown, the spring 102 is arranged at the bottom of the valve body 101, one end of which is connected to the inner wall of the bottom of the valve body 101, and the other end of which is connected to the valve core 103. In the above embodiment, the spring 102 can move with the movement of the valve core 103 in the valve body 101, and can provide a pulling force or a pushing force to the valve core 103 according to the different positions and states of the stretched or contracted positions of the spring 102.

[0063] Figure 3 1 is a schematic diagram of the structure of the valve core 103 of the solenoid valve 100 of the embodiment of the present application; Figure 1 and Figure 3As shown, the valve core 103 has three partitions 1031 and a shaft portion 1032. The three partitions 1031 are respectively arranged at the two ends and the middle position of the shaft portion 1032. Specifically, the three partitions 1031 are in the shape of flat cylinders and have the same thickness. The shaft portion 1032 passes through and connects the three partitions 1031 from the center of the circular cross-section of the partition 1031. The above is only a structural description of the valve core 103, but not a description of its manufacturing process. For example, the three partitions 1031 and the shaft portion 1032 of the valve core 103 can be manufactured in an integrally formed manner, and this application does not make any specific limitation on it.

[0064] In the above embodiment, if Figure 1 and Figure 3 As shown, the outer peripheries of the three partitions 1031 of the valve core 103 are in contact with the inner wall of the valve body 101, and a full-circle groove is provided on the side of the partition 1031, and the cross section of the groove is semicircular, which can be used to accommodate the sealing ring 1033. In addition, in order to obtain a sealing effect, the thickness of the partition 1031 can be slightly greater than or equal to the apertures of the first working hole A, the second working hole B and the first exhaust hole C, the second exhaust hole D, and smaller than the aperture of the air inlet hole P.

[0065] In the above embodiment, the valve core 103 is made of metal, and the valve body 101 is also made of metal. The specific metal types of the valve body 101 and the valve core 103 can refer to the prior art, and this application does not impose any limitation on this.

[0066] In the above embodiment, the material of the sealing ring 1033 can be rubber or other elastic materials, and the present application does not limit it. By providing the sealing ring 1033, the sealing between the air passages formed during the movement of the valve core 103 inside the valve body 101 can be ensured, and the wear between the valve core 103 and the valve body 101 can be reduced.

[0067] like Figure 1 As shown, the energized coil 104 of the solenoid valve 100 is arranged inside the valve body 101 and is located at the open end of the valve body 101, opposite to the spring 102. The energized coil 104 can provide switching power for the valve core 103, that is, it provides an attractive force or a repulsive force on the valve core 103 by energizing it in the forward and reverse directions, so that it moves inside the valve body 101.

[0068] By using the solenoid valve 100 with the above structure provided in the embodiment of the present application, only one solenoid valve can be used to control the pressurization, pressure equalization, pressure reduction, and nitrogen discharge of two molecular sieve cartridges. This improves the integration and reaction speed of the solenoid valve for the oxygen concentrator, and the solenoid valve has a small size, low cost, and is easy to operate, thereby miniaturizing the oxygen concentrator and improving the portability of the oxygen concentrator.

[0069] Next, the working process and working gear of the solenoid valve 100 of the embodiment of the present application will be described in detail. In the above embodiment, the solenoid valve 100 has three working gears: the first gear (also called the pressurization gear), the second gear (also called the decompression gear), and the third gear (also called the pressure equalization gear).

[0070] Specifically, the energized coil 104 can be set to be energized in the forward direction or the reverse direction, thereby generating an attractive force or a repulsive force on the valve core 103, so that the valve core 103 moves inside the valve body 101. In addition, since the range of movement of the valve core 103 inside the valve body 101 is mainly affected by the elastic force of the spring 102, and the elastic force between the spring 102 and the valve core 103 can be calculated based on the elastic coefficient of the spring, the position of the valve core 103 in the valve body 101 can be controlled by controlling the current of the energized coil 104, thereby adjusting different gears of the solenoid valve 100.

[0071] Figure 4 is a schematic diagram of the solenoid valve 100 of the embodiment of the present application being located at the first gear position; Figure 5 is a schematic diagram of the solenoid valve 100 of the embodiment of the present application being located at the second gear position; Figure 6 It is a schematic diagram of the solenoid valve 100 of the embodiment of the present application being located in the third gear position.

[0072] In the above embodiment, if Figure 4 , 5 In the solenoid valve 100 shown in , the first working hole A and the second working hole B are connected to the molecular sieve cartridge respectively, and the air inlet P is connected to the compressor. The compressor injects compressed air into the valve body 101 through the air inlet P, and the molecular sieve cartridge adsorbs and separates the injected compressed air, thereby separating oxygen and discharging nitrogen through the solenoid valve 100. In the above embodiment, by adjusting the above three working gears of the solenoid valve 100, different airways can be formed between the two molecular sieve cartridges and the compressor, thereby pressurizing, decompressing, discharging nitrogen, and equalizing the pressure of the two molecular sieve cartridges.

[0073] like Figure 4 As shown, when the energized coil 104 is energized and generates attraction to the valve core 103, the valve core 103 is attracted to a position in contact with the energized coil 104. At this time, the solenoid valve 100 is in the first gear position, and the spring 102 is in a stretched state;

[0074] When the valve core 103 is in the first gear position, Figure 4As shown by the dotted arrow in the figure, the first working hole A and the first exhaust hole C form a first channel AC, and the air inlet hole P and the second working hole B form a second channel PB. At this time, the molecular sieve cartridge connected to the first working hole A exhausts nitrogen and reduces pressure through the formed first channel AC, and the molecular sieve cartridge connected to the second working hole B intakes air and pressurizes air through the second channel PB.

[0075] like Figure 5 As shown, when the energized coil 104 is energized and generates a repulsive force on the valve core 103, the valve core 103 moves toward the bottom of the valve body 101 under the action of the repulsive force. At this time, the solenoid valve 100 is in the second gear position, and the spring 102 is in a compressed state;

[0076] When the valve core 103 is in the second gear position, Figure 5 As shown by the dotted arrow in the figure, the air inlet P and the first working hole A form a third channel PA, and the second working hole B and the second exhaust hole D form a fourth channel BD; at this time, the molecular sieve cartridge connected to the second working hole B exhausts nitrogen and reduces pressure through the fourth channel BD, and the molecular sieve cartridge connected to the first working hole A intakes air and increases pressure through the third channel PA.

[0077] like Figure 6 As shown, when the energized coil 104 is energized and the solenoid valve 100 is in the third gear, the middle partition of the valve core 103 coincides with the position of the air inlet hole P, and since the aperture of the air inlet hole P is larger than the diameter of the partition 1031 and the sealing ring 1033, there is a gap between the two sides of the middle partition and the air inlet hole P. At this time, the spring 102 is in a free expansion and contraction state.

[0078] When the valve core 103 is in the third gear position, Figure 6 As shown by the dotted arrows in the figure, the air inlet hole P and the first working hole A form the fifth channel PA, and the air inlet hole P and the second working hole B form the sixth channel PB; at this time, since the thickness of the middle partition of the valve core 103 and the diameter of the sealing ring 1033 are smaller than the aperture of the air inlet hole P, the air channel formed by the two molecular sieve cartridges and the valve core 103 inside the valve body 101 is connected through the gap between the air inlet hole P and the valve core partition. At this time, the air channels on both sides of the middle partition of the valve core 103 can exchange gases and then perform pressure equalization operation on the air channels on both sides and the two molecular sieve cartridges.

[0079] In addition, in the above embodiment, in order to make the middle partition just coincide with the air inlet P when the valve core 103 is in the third gear position to achieve pressure equalization, Figure 6As shown, the air inlet P is located in the middle of the first exhaust hole C and the second exhaust hole D, and in the horizontal direction, the air inlet P is also located on the cross section where the middle of the first working hole A and the second working hole B is located. In the above embodiment, as mentioned above, when the air inlet P is arranged between the first exhaust hole C and the second exhaust hole D, a groove N is further arranged on the valve body between the first working hole A and the second working hole B. The groove is formed as a closed groove with an opening toward the inside of the valve body 101. The groove N is opposite to the air inlet P, and its cross-sectional shape can be circular, square, or rectangular, and the present application does not limit this.

[0080] Next, the function of the groove N will be described in detail.

[0081] like Figure 6 As shown, since the groove N is located between the first working hole A and the second working hole B, when the valve core 103 is in the third gear position, the middle partition of the valve core 103 not only overlaps with the air inlet hole P, but also overlaps with the groove N. At this time, as in Figure 6 As shown by the arc dotted arrow in the figure, the gap between the middle partition and the two sides of the groove N can also form a seventh channel, through which the air passages on both sides of the middle partition of the valve core 103 of the seventh channel are connected and gas exchange is performed, thereby making it possible to make the pressure equalization speed faster in the third gear, thereby improving the working efficiency of the solenoid valve 100

[0082] In order to achieve the above effect of forming the seventh channel to accelerate the pressure equalization, the diameter of the groove N or the longest side should be larger than the diameter of the middle partition.

[0083] It should be noted that the above-mentioned groove N mainly acts when the valve core 103 is located at the third gear (i.e., the equalizing pressure gear). Therefore, only the third gear with the groove N is described, and the rest is the same as the above-mentioned embodiment and is omitted here.

[0084] Next, the stroke of the valve core 103 in the cavity of the valve body 101 in the embodiment of the present application is described.

[0085] Figure 7 Schematic diagram of the distances between the holes provided on the valve body 101. Figure 7 As shown, the hole center distance between the first working hole A and the second working hole B is L, the distances between the air inlet hole P and the first exhaust hole C and the second exhaust hole D are both d, the distance between the air inlet hole P and the first working hole A in the horizontal direction is d1, and the distance between the first working hole A and the first exhaust hole C in the horizontal direction is d2. In order to enable the valve core 103 to complete the gear switching and to miniaturize the solenoid valve 100 as much as possible, the solenoid valve 100 of the embodiment of the present application also satisfies the following relationship:

[0086]

[0087] The distance between the valve core partitions is greater than or equal to d1;

[0088] The distance between the valve core partitions is greater than or equal to d2;

[0089]

[0090] It should be noted that the above relationship Represents the diameter of X. In the specific implementation process, the aperture of each hole can be adjusted according to the compressor and molecular sieve connected to the oxygen concentrator, and the partition thickness and spacing of the valve core 103 can be set according to the above relationship, thereby completing the switching of the solenoid valve 100 between various gears, and in order to miniaturize the solenoid valve and the oxygen concentrator, in the positional relationship of the above structure, all are taken equal to achieve switching of three gears, but it can also be adjusted according to the needs of the specific implementation, and the present application does not impose specific restrictions on this. It is worth noting that the above only describes the structure of the solenoid valve related to the present application. The solenoid valve may also include other conventional structures. For details, please refer to the relevant technology, and the description is omitted here. In addition, it can also be added Figures 1 to 6 Parts not shown, or reduced Figures 1 to 6 For other components and structures of the solenoid valve, reference may be made to the relevant art, and the description thereof is omitted here.

[0091] Through the above-mentioned embodiments of the present application, only one solenoid valve can be used to complete the process of controlling the pressurization, pressure equalization, pressure reduction, and nitrogen exhaust of two molecular sieve cartridges, thereby improving the integration and reaction speed of the solenoid valve for the oxygen generator. The solenoid valve 100 provided in the embodiment of the present application is small in size, low in cost, and easy to operate, which can further miniaturize the oxygen generator and improve the portability of the oxygen generator.

[0092] Embodiments of the second aspect

[0093] An embodiment of the present application provides an oxygen concentrator, which includes the solenoid valve for the oxygen concentrator described in the embodiment of the first aspect.

[0094] Since the structure of the solenoid valve 100 has been described in detail in the embodiment of the first aspect, its content is incorporated here and will not be repeated here.

[0095] The oxygen concentrator provided in the embodiment of the present application can reduce the size of the oxygen concentrator, making it more portable.

[0096] The embodiments of the present application are described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art can make various modifications and variations to the embodiments of the present application based on the spirit and principles of the embodiments of the present application, and these modifications and variations are also within the scope of the embodiments of the present application.

[0097] The preferred embodiments of the present application are described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear from this detailed description, and therefore the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. In addition, since many modifications and changes are easily conceivable to those skilled in the art, it is not intended to limit the embodiments of the present application to the precise structures and operations illustrated and described, but all suitable modifications and equivalents that fall within its scope may be covered.

Claims

1. A solenoid valve for an oxygen concentrator, characterized in that: The solenoid valve comprises: The valve body is cylindrical and is provided with an air inlet, a first working hole, a second working hole, a first exhaust hole, and a second exhaust hole; a spring, which is located in the valve body and fixed to the bottom of the valve body; a valve core, which is located in the valve body and connected to the spring; and an energized coil located within the valve body and at an open end of the valve body; The valve core has a shaft and three partitions of the same thickness respectively arranged at both ends and in the middle of the shaft, the partitions are in contact with the inner wall of the valve body, and the portion of the partitions in contact with the inner wall of the valve body is provided with a sealing ring.

2. The solenoid valve according to claim 1, characterized in that: The first working hole and the second working hole are arranged on one side of the valve body wall, the first exhaust hole and the second exhaust hole are arranged on the other side of the valve body wall opposite to the first working hole and the second working hole, and the air inlet hole is arranged on the one side or the other side; Wherein, the air inlet hole is arranged between the first working hole and the second working hole, or the air inlet hole is arranged between the first exhaust hole and the second exhaust hole; Wherein, the air inlet hole is arranged on a cross section located exactly in the middle of the first working hole and the second working hole in the horizontal direction.

3. The solenoid valve according to claim 1, characterized in that: A first groove is provided on the entire circumference of the partition in the thickness direction, and the sealing ring is located in the first groove.

4. The solenoid valve according to claim 1, characterized in that: The thickness of the partition is equal to or slightly larger than the apertures of the first working hole, the second working hole, the first exhaust hole, and the second exhaust hole, and smaller than the aperture of the air inlet hole.

5. The solenoid valve according to claim 4, characterized in that: The solenoid valve satisfies the following positional relationship: The distance between the center of the first working hole and the center of the second working hole is greater than or equal to the sum of the diameter of the air inlet hole, twice the thickness of the partition plate, 1 / 2 of the diameter of the first working hole, and 1 / 2 of the diameter of the second working hole; The interval between the partitions is greater than or equal to the horizontal distance between the first working hole and the first exhaust hole; The interval between the partitions is also greater than or equal to the horizontal distance between the first working hole and the air inlet hole; The distance between the air inlet hole and the first exhaust hole and the second exhaust hole is equal to the interval between the partitions plus the thickness of the partitions minus the diameter of the first exhaust hole.

6. The solenoid valve according to claim 2, characterized in that: The solenoid valve has three gears: a first gear, a second gear, and a third gear, wherein: When the energized coil is energized and the valve core is attracted by the energized energized coil, the solenoid valve is in the first gear position and the spring is in a stretched state; When the energized coil is energized and the valve core is repelled by the energized energized coil, the solenoid valve is in the second gear position and the spring is in a compressed state; When the energized coil is energized and the middle partition of the valve core coincides with the position of the air inlet, the solenoid valve is in the third gear, and there is a gap between the two sides of the middle partition and the air inlet, and the spring is in a free expansion and contraction state.

7. The solenoid valve according to claim 6, characterized in that: When the valve core is in the first gear position, the first working hole and the first exhaust hole form a first channel, and the air inlet hole and the second working hole form a second channel; The solenoid valve exhausts air through the first passage to reduce pressure, and intakes air through the second passage to increase pressure; When the valve core is in the second gear position, the air intake hole and the first working hole form a third channel, and the second working hole and the second exhaust hole form a fourth channel; the solenoid valve takes in air through the third channel to increase pressure, and exhausts air through the fourth channel to reduce pressure; When the valve core is in the third gear, the air inlet hole and the first working hole form a fifth channel, and the air inlet hole and the second working hole form a sixth channel; the solenoid valve exchanges air and balances pressure through the fifth channel and the sixth channel.

8. The solenoid valve according to claim 2, characterized in that: The air inlet is arranged between the first exhaust hole and the second exhaust hole, the valve body of the solenoid valve is further provided with a second groove, and the second groove is arranged between the first working hole and the second working hole, at a position opposite to the air inlet; Wherein, the diameter of the second groove is greater than or equal to the thickness of the partition of the valve core.

9. The solenoid valve according to claim 8, characterized in that: The solenoid valve has three gears: a first gear, a second gear, and a third gear, wherein: When the energized coil is energized and the valve core is attracted by the energized energized coil, the solenoid valve is in the first gear position and the spring is in a stretched state; When the energized coil is energized and the valve core is repelled by the energized energized coil, the solenoid valve is in the second gear position and the spring is in a compressed state; When the energized coil is energized and the middle partition of the valve core coincides with the position of the air inlet hole and the second groove, the solenoid valve is in the third gear, and there are gaps between the two sides of the middle partition and the air inlet hole and the second groove, and the spring is in a free expansion and contraction state.

10. The solenoid valve according to claim 9, characterized in that: When the valve core is in the first gear position, the first working hole and the first exhaust hole form a first channel, and the air inlet hole and the second working hole form a second channel; The solenoid valve exhausts air through the first passage to reduce pressure, and intakes air through the second passage to increase pressure; When the valve core is in the second gear position, the air intake hole and the first working hole form a third channel, and the second working hole and the second exhaust hole form a fourth channel; the solenoid valve takes in air through the third channel to increase pressure, and exhausts air through the fourth channel to reduce pressure; When the valve core is in the third gear, the air inlet hole and the first working hole form a fifth channel, the air inlet hole and the second working hole form a sixth channel, and the gaps between the middle partition and the two sides of the second groove form a seventh channel; The solenoid valve exchanges air and balances pressure through the fifth channel, the sixth channel, and the seventh channel.

11. The solenoid valve according to claim 1, characterized in that: The first working hole and the second working hole are connected to the molecular sieve cartridge respectively; the air inlet hole is connected to a compressor.

Images