Valve

Abstract

A valve for selectively connecting or disconnecting a first space and a second space includes a valve body, a first spool, a second spool, a first elastic member, and a second elastic member. According to the valve, when the air pressure of the first space is higher than that of the second space, under the action of air pressure difference, air in the first space flows into the second space through the first air channel, and the second air channel is stabilized in a closed state; besides, when the air pressure of the second space is higher than that of the first space, under the action of the reverse air pressure difference, the air in the second space flows into the first space through the second air channel, and the first air channel is stabilized in a closed state, so that the use requirements of related application scenes are met.

Description

TECHNICAL FIELD

[0001] The application relates to a valve. BACKGROUND

[0002] A valve disclosed in Chinese patent document CN112361047 A is capable of bidirectional air exchange.

[0003] For the valve disclosed in the patent document, in the working state of forward air exchange and reverse air exchange, the air in the two spaces (first space and second space respectively) located at the two opposite sides of the valve is exchanged via the same air passage, however, such design is inappropriate in some application scenarios, for example, the application scenario in which the air in the first space is expected to flow into the second space via a dedicated passage and the air in the second space is expected to flow into the first space via another passage, wherein the dedicated passage is capable of performing relevant treatment on the air, the other passage does not perform relevant treatment on the air, or the dedicated passage is capable of performing first treatment on the air, and the other passage performs second treatment different from the first treatment on the air. SUMMARY

[0004] In view of this, the application provides a valve.

[0005] A valve for selectively connecting or disconnecting a first space and a second space, the valve comprising:

[0006] a valve body having a first air inlet communicating with the first space, a first air outlet communicating with the second space, and a first air passage extending between the first air inlet and the first air outlet;

[0007] a first valve core movably arranged in the first air passage between a first closed position and a first open position, and having a second air inlet communicating with the second space, a second air outlet communicating with the first space, and a second air passage extending between the second air inlet and the second air outlet; in the first closed position, the first valve core is close to the first air inlet and blocks the first air passage, and in the first open position, the first valve core is away from the first air inlet, so that the first air inlet and the first air outlet are communicated via the first air passage;

[0008] a second valve core movably arranged in the second air passage between a second closed position and a second open position; in the second closed position, the second valve core is close to the second air inlet and blocks the second air passage, and in the second open position, the second valve core is away from the second air inlet, so that the second air inlet and the second air outlet are communicated via the second air passage;

[0009] a first elastic member biasing the first valve core toward the first closed position;

[0010] a second elastic member biasing the second valve core toward the second closed position;

[0011] the air pressure in the first space biases the first valve core toward the first open position and the second valve core toward the second closed position, and the air pressure in the second space biases the second valve core toward the second open position and the first valve core toward the first closed position.

[0012] In some possible embodiments, the first gas inlet, the first gas passage and the first gas outlet are arranged in sequence along a positive direction of a first direction, and the second gas inlet, the second gas passage and the second gas outlet are arranged in sequence along a negative direction of the first direction.

[0013] In some possible embodiments, the first gas passage surrounds the second gas passage in a circumferential direction around the first direction, and the two are spaced apart from each other in the circumferential direction.

[0014] In some possible embodiments, the first closed position and the first open position are arranged along a positive direction of the first direction, and the second closed position and the second open position are arranged along a negative direction of the first direction.

[0015] In some possible embodiments, the valve body has a first guide hole penetrating from an outer surface of the valve body to the first gas passage in the first direction, the first valve core is inserted into the guide hole in a manner capable of reciprocating in the first direction, and the second gas inlet falls entirely within the first guide hole when viewed in the first direction.

[0016] The first valve core has a second guide hole penetrating from an outer surface of the first valve core to the second gas passage in the first direction, the second valve core is inserted into the second guide hole in a manner capable of reciprocating in the first direction, and the second guide hole falls entirely within the first gas inlet when viewed in the first direction.

[0017] In some possible embodiments, the first gas passage has a first wall surface and a second wall surface arranged in sequence and opposite to each other along a positive direction of the first direction, and the second gas passage has a third wall surface and a fourth wall surface arranged in sequence and opposite to each other along a negative direction of the first direction.

[0018] The first valve core has a first convex ring protruding toward a negative direction of the first direction, and the second valve core has a second convex ring protruding toward a positive direction of the first direction.

[0019] Each of the first wall surface and the first convex ring encloses the first gas inlet port on a full circumference when viewed in the first direction, and each of the third wall surface and the second convex ring encloses the second gas inlet port on a full circumference;

[0020] In the first closed position, the first convex ring sealingly abuts against the first wall surface in a negative direction of the first direction, and in the second closed position, the second convex ring sealingly abuts against the third wall surface in a positive direction of the first direction.

[0021] In some possible embodiments, the first valve core comprises:

[0022] a first seal plate extending perpendicularly to the first direction and having the first convex ring, the second outlet, the second guide hole, and the fourth wall surface;

[0023] a second housing extending in a positive direction of the first direction from an inner circumferential side of an outer circumference of the first seal plate and an outer circumferential side of the second gas outlet and having the second gas inlet port;

[0024] The second housing is inserted into the first guide hole in a manner capable of reciprocating in the first direction, and the second housing and the first seal plate jointly define the second gas passage;

[0025] The second valve core comprises:

[0026] a second seal plate extending perpendicularly to the first direction and having the second convex ring;

[0027] a stem portion extending in a negative direction of the first direction from an inner circumferential side of an outer circumference of the first seal plate and being inserted into the second guide hole in a manner capable of reciprocating in the first direction.

[0028] In some possible embodiments, the first elastic member is a coil spring sleeved outside the second housing and clamped between the first seal plate and the second wall surface in the first direction;

[0029] The second elastic member is a coil spring sleeved outside the stem portion and clamped between the second seal plate and the fourth wall surface in the first direction.

[0030] In some possible embodiments, only one of the first gas passage and the second gas passage is provided with a gas treatment agent.

[0031] In some possible implementations, one of the first gas channel and the second gas channel is provided with a first gas treatment agent, and the other is provided with a second gas treatment agent, wherein the first gas treatment agent and the second gas treatment agent are different gas treatment agents.

[0032] According to the valve provided in this application, when the air pressure in the first space is higher than the air pressure in the second space by a predetermined value, the first valve core, under the action of the first air pressure difference between the first and second spaces, overcomes the elastic biasing force of the first elastic member and moves to the first open position. Thus, the gas in the first space flows into the second space through the first gas channel. At this time, the second valve core, under the action of the second elastic member and the first air pressure difference, stabilizes in the second closed position. Therefore, it effectively prevents the gas in the first space from flowing into the second space through the second gas channel; that is, the gas in the first space can essentially only flow into the second space through the first gas channel and not through the second gas channel, thereby achieving air pressure balance between the first and second spaces. Once the air pressures of the two spaces reach equilibrium, the first valve core returns to the first closed position, blocking the first gas channel again.

[0033] When the air pressure in the second space is higher than the air pressure in the first space by a predetermined value, the second valve core, under the action of the second air pressure difference between the second and first spaces, overcomes the elastic biasing force of the second elastic member and moves to the second open position. Thus, the gas in the second space flows into the first space through the second gas channel. At this time, the first valve core is stabilized in the first closed position under the action of the first elastic member and the second air pressure difference. Therefore, it effectively prevents gas from flowing into the first space through the first gas channel; that is, gas in the second space can essentially only flow into the second space through the second gas channel and not through the first gas channel, thereby achieving air pressure balance between the second and first spaces. Once the air pressures of the two spaces reach equilibrium, the second valve core returns to the second closed position, blocking the second gas channel again. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0035] Figure 1 This is a three-dimensional schematic diagram of a valve provided in an embodiment of this application.

[0036] Figure 2 yes Figure 1 Side view.

[0037] Figure 3 yes Figure 2 A cross-sectional view is shown, illustrating the first and second spaces.

[0038] Figure 4 yes Figure 2 A schematic diagram showing the first valve core in the first open position.

[0039] Figure 5 yes Figure 2 A schematic diagram showing the second valve core in the second open position.

[0040] Figure 6 yes Figure 1 Top view.

[0041] Figure 7 yes Figure 1 A bottom view.

[0042] Explanation of reference numerals in the attached figures:

[0043] DR1 - First direction;

[0044] CP1 - First closed position, OP1 - First open position, CP2 - Second closed position, OP2 - Second open position;

[0045] D1 - First air gap, D2 - Second air gap;

[0046] 1-Valve body, 8-First housing, 8a-Inner flange, 8a1-First wall surface, 8b-First air inlet, 9-First cover, 9a-First air outlet, 9b-First guide hole, 9c-Second wall surface, 1a-First gas passage;

[0047] 2-First valve core, 10-First sealing plate, 10a-Second air outlet, 10b-Second guide hole, 10c-Fourth wall surface, 10d-First convex ring, 11-Second housing, 12-Second cover, 12a-Second air inlet, 12b-Third wall surface, 2a-Second gas passage;

[0048] 3-Second valve core, 13-Second sealing plate, 13a-Second convex ring, 14-Stem;

[0049] 4-First elastic member;

[0050] 5-Second elastic member;

[0051] 6-First Space;

[0052] 7-Second Space. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0054] In the description of this application, the terms "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects, and, for example, the term "first element" itself does not imply the existence of a "second element," nor does the term "second element" itself imply the existence of a "first element." Furthermore, words such as "a" or "one" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates not less than two.

[0055] Figures 1 to 7 A valve according to an embodiment of this application is shown. This valve is a gas valve used to selectively connect or disconnect a first space 6 and a second space 7, so as to allow gas (e.g., air) to flow and exchange between the first space 6 and the second space 7 as needed, or to prevent gas flow and exchange between the first space 6 and the second space 7. For ease of explanation of the valve's structure and function, Figures 3 to 5 The first space 6 and the second space 7 are indicated by two dashed boxes.

[0056] In some applications, the valve can be installed on industrial products such as battery packs (or automotive lights), the battery pack including a battery box and a battery, a second space 7 defined by the battery box, the battery being housed in the second space 7 defined by the battery box, and a first space 6 being the atmospheric environment in which the battery pack is located.

[0057] The valve mainly includes a valve body 1, a first valve core 2, a second valve core 3, a first elastic component 4, and a second elastic component 5.

[0058] The valve body 1 has a first air inlet 8b communicating with the first space 6, a first air outlet 9a communicating with the second space 7, a first gas passage 1a extending between the first air inlet 8b and the first air outlet 9a, and a first guide hole 9b for guiding the movement of the first valve core 2.

[0059] In detail, the valve body 1 includes a first housing 8 that is fully open at one end and has an inner flange 8a at the other end, and a first cover 9 that is detachably attached to the fully open end of the first housing 8. The outer contour of the first housing 8 is generally cylindrical. A first air inlet 8b is a hole defined by the inner peripheral wall of the inner flange 8a and extending in a first direction DR1. A first air outlet 9a and a first guide hole 9b are both holes that penetrate the first cover 9 in the first direction DR1. That is, the first housing 8 has a first air inlet 8b, while the first cover 9 has a first air outlet 9a and a first guide hole 9b.

[0060] For ease of explanation, the direction pointed to by the arrow of the first direction DR1 is defined as the positive direction of the first direction DR1, and the opposite direction, that is, the direction without an arrow, is defined as the negative direction of the first direction DR1.

[0061] In this embodiment, only one first air inlet 8b and one first guide hole 9b are provided, while multiple first air outlets 9a are provided. These multiple first air outlets 9a are evenly arranged around the first guide hole 9b and communicate with it. Therefore, in terms of configuration, each first air outlet 9a is a recess that is radially outward from the hole wall of the first guide hole 9b. In other embodiments, the first air outlets 9a and the first guide holes 9b are spaced apart from each other.

[0062] The first air inlet 8b, the first gas passage 1a, and the first air outlet 9a are arranged sequentially along the positive direction of the first direction DR1.

[0063] The first valve core 2 is disposed in the first gas channel 1a in a manner that allows it to move between the first closed position CP1 and the first open position OP1. The first closed position CP1 and the first open position OP1 are arranged sequentially along the positive direction of the first direction DR1. In the first closed position CP1, the first valve core 2 is close to the first air inlet 8b (the first valve core 2 covers the first air inlet 8b from the inside) and blocks the first gas channel 1a. At this time, the first air inlet 8b is isolated from the first air outlet 9a, and gas cannot flow and exchange between the first space 6 and the second space 7 through the first gas channel 1a. In the first open position OP1, the first valve core 2 moves away from the first air inlet 8b, thereby connecting the first air inlet 8b and the first air outlet 9a through the first gas channel 1a. At this time, gas can flow and exchange between the first space 6 and the second space 7 through the first gas channel 1a. For example, gas in the first space 6 can flow into the second space 7 through the first gas channel 1a.

[0064] Furthermore, the first valve core 2 has a second air inlet 12a communicating with the second space 7, a second air outlet 10a communicating with the first space 6 via the aforementioned first air inlet 8b, a second gas passage 2a extending between the second air inlet 12a and the second air outlet 10a, and a second guide hole 10b, wherein the second air inlet 12a is communicating with the second space 7 via the second guide hole 10b.

[0065] In detail, the outer contour of the first valve core 2 is formed into a generally T-shape in a side view, and includes a first sealing plate 10 and a second housing 11, which together define a second gas passage 2a. The first sealing plate 10 extends perpendicular to the first direction DR1 and has a generally circular outer periphery. The second air outlet 10a and the second guide hole 10b are both through holes in the first direction DR1 that pass through the first sealing plate 10, that is, the first sealing plate 10 has the aforementioned second air outlet 10a and second guide hole 10b. The second housing 11 extends from the inner periphery of the outer periphery of the first sealing plate 10 and the outer periphery of the second air outlet 10a toward the positive direction of the first direction DR1, and has the aforementioned second air inlet 12a.

[0066] More specifically, the second housing 11 has an open end opposite to the first sealing plate 10 in the first direction DR1, a second cover 12 detachably attached to the open end of the second housing 11, and a second air inlet 12a is a through hole penetrating the second cover 12 in the first direction DR1.

[0067] The second air inlet 12a, the second gas passage 2a, and the second air outlet 10a are arranged sequentially in the negative direction of the first direction DR1.

[0068] In this embodiment, only one second air inlet 12a and one second guide hole 10b are provided, while multiple second air outlets 10a are provided. These multiple second air outlets 10a are evenly arranged around the second guide hole 10b and communicate with it. Therefore, in terms of configuration, each second air outlet 10a is a recess that is radially outward from the hole wall of the second guide hole 10b. In other embodiments, the second air outlets 10a and the second guide holes 10b are spaced apart from each other.

[0069] The second valve core 3 is disposed in the second gas passage 2a in a manner that allows it to move between the second closed position CP2 and the second open position OP2. The second closed position CP2 and the second open position OP2 are arranged sequentially along the negative direction of the first direction DR1. In the second closed position CP2, the second valve core 3 is close to the second air inlet 12a (the second valve core 3 covers the second air inlet 12a from the inside) and blocks the second gas passage 2a. At this time, the second air inlet 12a is isolated from the second air outlet 10a, and gas cannot flow and exchange between the first space 6 and the second space 7 through the second gas passage 2a. In the second open position OP2, the second valve core 3 moves away from the second air inlet 12a, thereby connecting the second air inlet 12a and the second air outlet 10a through the second gas passage 2a. At this time, gas can flow and exchange between the first space 6 and the second space 7 through the second gas passage 2a. For example, gas in the second space 7 can flow into the first space 6 through the second gas passage 2a.

[0070] In detail, the second valve core 3 is formed into a generally T-shape in a side view, and includes an integrally formed second sealing plate 13 and a stem 14. The second sealing plate 13 extends perpendicular to the first direction DR1 and has a generally circular periphery. The stem 14 extends from the inner periphery of the outer periphery of the first sealing plate 10 toward the negative direction of the first direction DR1. The stem 14 can be a solid structure or a hollow structure.

[0071] In this embodiment, since the first cover 9 is detachably attached to the open end of the first housing 8, the first valve core 2 and the first elastic member 4 can be easily installed into and removed from the first gas passage 1a. Furthermore, since the second cover 12 is detachably attached to the open end of the second housing 11, the second valve core 3 and the second elastic member 5 can be easily installed into and removed from the second gas passage 2a.

[0072] The first elastic member 4 applies force to the first valve core 2, causing the first valve core 2 to be biased toward the first closed position CP1. That is, the first elastic member 4 has a tendency to cause the first valve core 2 to block the first gas passage 1a. Specifically, the first elastic member 4 is a helical spring sleeved outside the second housing 11 and clamped in the first direction DR1 between the first sealing plate 10 and the first cover 9 (specifically, the second wall surface 9c described later defined by the first cover 9).

[0073] The second elastic member 5 applies force to the second valve core 3 to bias the second valve core 3 toward the second closed position CP2. That is, the second elastic member 5 has a tendency to direct the second gas passage 2a of the second valve core 3. Specifically, the second elastic member 5 is another helical spring that is sleeved outside the rod portion 14 and clamped in the first direction DR1 between the first sealing plate 10 (specifically, the fourth wall surface 10c defined by the first sealing plate 10, described later) and the second sealing plate 13.

[0074] Furthermore, the air pressure in the first space 6 causes the first valve core 2 to be biased toward the first open position OP1, and the second valve core 3 to be biased toward the second closed position CP2. That is, the air pressure in the first space 6 has a tendency to cause the first valve core 2 to unblock the first gas passage 1a and to cause the second valve core 3 to block the second gas passage 2a.

[0075] Similarly, the air pressure in the second space 7 biases the first valve core 2 toward the first closed position CP1 and the second valve core 3 toward the second open position OP2. That is, the air pressure in the second space 7 has a tendency to cause the second valve core 3 to unblock the second gas passage 2a and to cause the first valve core 2 to block the first gas passage 1a.

[0076] Therefore, when the air pressure in the first space 6 is higher than the air pressure in the second space 7 by a predetermined value (for example, the predetermined value is 500 Pa), the first valve core 2, under the action of the air pressure difference between the first space 6 and the second space 7 (for ease of explanation, referred to as the first air pressure difference), overcomes the elastic biasing force of the first elastic member 4 and moves to the first open position OP1. Thus, the gas in the first space 6 flows to the second space 7 through the first gas channel 1a. At this time, the second valve core 3, under the action of the second elastic member 5 and the first air pressure difference, is stabilized at the second closed position CP2. Therefore, it is possible to prevent the gas in the first space 6 from flowing into the second space 7 through the second gas channel 2a; that is, the gas in the first space 6 can essentially only flow into the second space 7 through the first gas channel 1a and not through the second gas channel 2a. It is understandable that the opening of the first gas passage 1a can achieve pressure balance between the first space 6 and the second space 7. Once the pressure of the two reaches balance, that is, the pressure difference between the first space 6 and the second space 7 drops below the aforementioned specified value, the first valve core 2 returns to the first closed position CP1 and blocks the first gas passage 1a again.

[0077] Similar to the aforementioned situation, when the air pressure in the second space 7 is higher than the air pressure in the first space 6 by a predetermined value (for example, the predetermined value is 400 Pa), the second valve core 3, under the action of the air pressure difference between the second space 7 and the first space 6 (for ease of explanation, referred to as the second air pressure difference), overcomes the elastic biasing force of the second elastic member 5 and moves to the second open position OP2. Thus, the gas in the second space 7 flows into the first space 6 through the second gas channel 2a. At this time, the first valve core 2 is stabilized in the first closed position CP1 under the action of the first elastic member 4 and the second air pressure difference. Therefore, it is possible to prevent the gas in the second space 7 from flowing into the first space 6 through the first gas channel 1a; that is, the gas in the second space 7 can essentially only flow into the second space 7 through the second gas channel 2a and not through the first gas channel 1a. It is understandable that the opened second gas passage 2a can achieve pressure balance between the second space 7 and the first space 6. Once the pressure of the two reaches balance, that is, the pressure difference between the second space 7 and the first space 6 drops below the aforementioned specified value, the second valve core 3 returns to the second closed position CP2 and blocks the second gas passage 2a again.

[0078] This design has advantages:

[0079] For example, in some application scenarios, the second space 7 has certain requirements for the gas inside it (e.g., humidity), while the first space 6 (especially when the first space 6 is an atmospheric environment) does not have such requirements. In this case, a gas treatment agent (e.g., a desiccant) can be placed in the first gas channel 1a, without having to place such a gas treatment agent in the second gas channel 2a. In this way, on the one hand, the gas from the first space 6 is processed by the gas treatment agent before entering the second space 7, thereby meeting the gas quality requirements of the second space 7; on the other hand, it helps to save the amount of gas treatment agent used. If the gas treatment agent is also arranged in the second gas channel 2a, the treatment agent in the second gas channel 2a will lose its effectiveness more quickly due to the continuous processing of the gas in the first space 6 (because the first space 6 and the second gas channel 2a are always connected through the second gas outlet 10a), especially when the first space 6 is a large space such as an atmospheric environment; and furthermore, since the gas in the second space 7 will not flow into the gas in the first space 6 through the first gas channel 1a containing the gas treatment agent, the gas treatment agent in the first gas channel 1a will not be rendered ineffective.

[0080] For example, in other application scenarios, the first space 6 has requirements for a first indicator (e.g., humidity) of the gas inside, while the second space 7 has requirements for a second indicator (e.g., odor) of the gas inside. In this case, a first gas treatment agent, such as a desiccant, can be arranged in the first gas channel 1a, and a second gas treatment agent, such as a fragrance, can be arranged in the second gas channel 2a. In this way, on the one hand, the gas from the first space 6 is treated by the second gas treatment agent before entering the second space 7, thereby meeting the second indicator requirements of the gas in the second space 7. On the other hand, the gas from the second space 7 is treated by the first gas treatment agent before entering the first space 6, thereby meeting the first indicator requirements of the gas in the first space 6. Furthermore, this helps to save the amount of the first and second gas treatment agents used.

[0081] The first gas passage 1a surrounds the second gas passage 2a in the circumferential direction around the first direction DR1, and the two are separated from each other in the circumferential direction.

[0082] Based on the above description and appendix Figures 1 to 7 It is known that the first guide hole 9b extends from the outer surface of the valve body 1 to the first gas passage 1a in the first direction DR1, and the first valve core 2 is inserted into the first guide hole 9b in a manner that allows it to move back and forth along the first direction DR1. Therefore, with the help of the first guide hole 9b on the valve body 1, not only can the first valve core 2 be smoothly guided to move between the first closed position CP1 and the first open position OP1, but also, when the air pressure in the first space 6 is relatively high, the first guide hole 9b can provide the first valve body 1 with a sufficiently large space for movement—for example, a portion of the first valve body 1 can extend out from the first guide hole 9b, thereby avoiding the need for a large valve body.

[0083] The aforementioned second guide hole 10b extends from the outer surface of the first valve core 2 to the second gas passage 2a in the first direction DR1. The second valve core 3 is inserted into the second guide hole 10b in a manner that allows it to move back and forth along the first direction DR1. Therefore, with the help of the second guide hole 10b on the first valve core 2, not only can the second valve core 3 be smoothly guided between the second closed position CP2 and the second open position OP2, but also, when the air pressure in the second space 7 is relatively high, the second guide hole 10b can provide a sufficiently large space for the second valve body 1 to move, thereby avoiding the need for a large valve body.

[0084] In this embodiment, when viewed along the first direction DR1, the second air inlet 12a is completely inside the first guide hole 9b, and the second guide hole 10b is completely inside the first air inlet 8b.

[0085] The first gas passage 1a has a first wall surface 8a1 and a second wall surface 9c arranged sequentially and opposite to each other along the positive direction of the first direction DR1. The first wall surface 8a1 and the second wall surface 9c are defined by an inner flange 8a and a first cover 9, respectively. The first wall surface 8a1 surrounds the first air inlet 8b in its entire circumference and is continuous with the first air inlet 8b (the inner edge of the first air inlet 8b is defined by the first wall surface 8a1). The first wall surface 8a1 faces the positive direction of the first direction DR1, while the second wall surface 9c faces the negative direction of the first direction DR1. A helical spring, which serves as the first elastic member 4, has its two ends abutting against the first wall surface 8a1 and the second wall surface 9c, respectively.

[0086] The second gas passage 2a has a third wall surface 12b and a fourth wall surface 10c arranged sequentially and opposite to each other along the negative direction of the first direction DR1. The third wall surface 12b and the fourth wall surface 10c are defined by the second cover 12 and the first sealing plate 10, respectively. Furthermore, the third wall surface 12b surrounds the second air inlet 12a in its entire circumference and is continuous with the second air inlet 12a (the inner edge of the second air inlet 12a is defined by the third wall surface 12b). The third wall surface 12b faces the negative direction of the first direction DR1, while the fourth wall surface 10c faces the positive direction of the first direction DR1. A helical spring, which serves as the second elastic member 5, abuts against the third wall surface 12b and the fourth wall surface 10c at its two ends, respectively.

[0087] The first valve core 2 has a first protruding ring 10d protruding negatively toward the first direction DR1, and the second valve core 3 has a second protruding ring 13a protruding positively toward the first direction DR1. The first protruding ring 10d and the second protruding ring 13a can be elastic structures that can elastically deform under force, such as rubber rings. When viewed along the first direction DR1 (corresponding to the projection of the relevant element on the first direction DR1), the first protruding ring 10d surrounds the first air inlet 8b, the second air outlet 10a and the second guide hole 10b on its entire circumference, and the second protruding ring 13a surrounds the second air inlet 12a on its entire circumference.

[0088] like Figure 3 and Figure 5As shown, when the first valve core 2 is in the first closed position CP1, the first convex ring 10d, in a state of elastic compression deformation, seals against the first wall surface 8a1 in the negative direction of the first direction DR1, thereby blocking the first gas passage 1a and thus blocking the airflow path of the first gas passage 1a. The first convex ring 10d can effectively ensure the sealing performance of the first valve core 2 against the first wall surface 8a1, improving the sealing strength of the first valve core 2 against the first gas passage 1a. In some other embodiments, the first convex ring 10d can be omitted, and the planar surface of the first sealing plate 10 can be used directly to abut against the first wall surface 8a1 to block the first gas passage 1a. In still other embodiments, the first convex ring 10d can also be a non-elastic structure, for example, a rigid structure integrally formed on the first sealing plate 10. In this way, the sealing strength of the first valve core 2 against the first gas passage 1a can also be improved.

[0089] like Figure 4 As shown, when the first valve core 2 is in the first open position OP1, the first convex ring 10d leaves the first wall surface 8a1, thereby connecting the first air inlet 8b and the first air outlet 9a through the first gas channel 1a.

[0090] like Figure 3 and Figure 4 As shown, when the second valve core 3 is in the second closed position CP2, the second convex ring 13a, in a state of elastic compression deformation, seals against the third wall surface 12b along the first direction DR1, thereby blocking the second gas passage 2a and thus blocking the airflow path of the second gas passage 2a. The second convex ring 13a can effectively ensure the sealing performance of the second valve core 3 against the third wall surface 12b, improving the sealing strength of the second valve core 3 against the second gas passage 2a. In some other embodiments, the second convex ring 13a can be omitted, and the planar surface of the second sealing plate 13 can directly abut against the third wall surface 12b to block the second gas passage 2a. In still other embodiments, the second convex ring 13a can also be a non-elastic structure, for example, a rigid structure integrally formed on the second sealing plate 13. In this way, the sealing strength of the second valve core 3 against the second gas passage 2a can also be improved.

[0091] like Figure 5 As shown, when the second valve core 3 is in the aforementioned second open position OP2, the second convex ring 13a leaves the third wall surface 12b, thereby connecting the second air inlet 12a and the second air outlet 10a via the second gas channel 2a.

[0092] Please also see Figures 3 to 5The first gas passage 1a has an inner peripheral wall surrounding the first direction DR1. When the first valve core 2 moves to any position (including the first open position OP1 and the first closed position) in the first gas passage 1a along the first direction DR1, a first gas passage gap D1 is formed between the inner peripheral wall of the first gas passage and the first valve core 2. Therefore, once the first convex ring 10d leaves the first wall surface 8a1, the first gas passage 1a is opened. The second gas passage 2a has an inner peripheral wall surrounding the first direction DR1. When the second valve core 3 moves to any position (including the second open position OP2 and the second closed position) in the first gas passage 1a along the first direction DR1, a second gas passage gap D2 located on the outer peripheral side of the second valve core 3 is formed between the inner peripheral wall of the second gas passage and the second valve core 3. Therefore, once the first convex ring 10d leaves the first wall surface 8a1, the first gas passage 1a is opened. In addition, since the inner circumferential wall of the first gas passage 1a and the first valve core 2, and the inner circumferential wall of the second gas passage 2a and the second valve core 3 are not in full circumferential sealing contact, the smoothness of the movement of the first valve core 2 and the second valve core 3 in the first direction DR1 is improved.

[0093] Each of the first gas passage gap D1 and the second gas passage gap D2 can be a continuously extending annular gap or an intermittently extending annular gap. For example, the inner peripheral wall of the first gas passage 1a has a plurality of guide grooves that extend linearly along the first direction DR1 and are spaced apart around the first direction DR1, and the first valve core 2 has a plurality of protrusions that extend outward from the outer periphery of the first sealing plate 10 and are spaced apart around the first direction DR1. The plurality of protrusions are slidably fitted into the plurality of guide grooves, thereby guiding the movement of the first valve core 2 by utilizing the cooperation between the protrusions and the guide grooves, and thereby making the first gas passage gap D1 an intermittently extending annular gap.

[0094] In some embodiments, the first protruding ring 10d is a rubber ring that is detachably fitted onto the main surface of the first sealing plate 10, and the second protruding ring 13a is another rubber ring that is detachably fitted onto the main surface of the second sealing plate 13.

Claims

1. A valve for selectively connecting or disconnecting a first space and a second space, characterized in that, The valve includes: The valve body has a first air inlet communicating with the first space, a first air outlet communicating with the second space, and a first gas passage extending between the first air inlet and the first air outlet. A first valve core is disposed in the first gas channel in a manner that allows it to move between a first closed position and a first open position, and has a second air inlet communicating with the second space, a second air outlet communicating with the first space, and a second gas channel extending between the second air inlet and the second air outlet; in the first closed position, the first valve core approaches the first air inlet and blocks the first gas channel, and in the first open position, the first valve core moves away from the first air inlet, thereby allowing the first air inlet and the first air outlet to communicate via the first gas channel; The second valve core is disposed in the second gas passage in a manner that allows it to move between a second closed position and a second open position; in the second closed position, the second valve core approaches the second air inlet and blocks the second gas passage; in the second open position, the second valve core moves away from the second air inlet, thereby allowing the second air inlet and the second air outlet to communicate via the second gas passage. A first elastic member applies force to the first valve core to bias the first valve core toward the first closed position; The second elastic member applies force to the second valve core to bias the second valve core toward the second closed position; The air pressure in the first space causes the first valve core to be biased toward the first open position and the second valve core to be biased toward the second closed position; the air pressure in the second space causes the second valve core to be biased toward the second open position and the first valve core to be biased toward the first closed position.

2. The valve according to claim 1, characterized in that, The first air inlet, the first gas channel, and the first air outlet are arranged sequentially along the positive direction of the first direction, and the second air inlet, the second gas channel, and the second air outlet are arranged sequentially along the negative direction of the first direction.

3. The valve according to claim 2, characterized in that, The first gas passage surrounds the second gas passage circumferentially about the first direction, and the two are spaced apart from each other in the circumferential direction.

4. The valve according to claim 2, characterized in that, The first closed position and the first open position are arranged in the positive direction along the first direction, and the second closed position and the second open position are arranged in the negative direction along the first direction.

5. The valve according to claim 4, characterized in that, The valve body has a first guide hole extending from the outer surface of the valve body to the first gas passage in the first direction. The first valve core is inserted into the guide hole in a manner that allows it to reciprocate along the first direction. When viewed along the first direction, the second air inlet is completely inside the first guide hole. The first valve core has a second guide hole extending from the outer surface of the first valve core to the second gas passage in the first direction. The second valve core is inserted into the second guide hole in a manner that allows it to reciprocate along the first direction. When viewed along the first direction, the second guide hole is completely inside the first air inlet.

6. The valve according to claim 4, characterized in that, The first gas channel has a first wall and a second wall arranged sequentially and opposite to each other along the positive direction of the first direction, and the second gas channel has a third wall and a fourth wall arranged sequentially and opposite to each other along the negative direction of the first direction. The first valve core has a first protruding ring that protrudes negatively toward the first direction, and the second valve core has a second protruding ring that protrudes positively toward the first direction; When viewed along the first direction, each of the first wall surface and the first convex ring surrounds the first air inlet on its entire circumference, and each of the third wall surface and the second convex ring surrounds the second air inlet on its entire circumference. In the first closed position, the first convex ring seals against the first wall surface in the negative direction of the first direction; in the second closed position, the second convex ring seals against the third wall surface in the positive direction of the first direction.

7. The valve according to claim 6, characterized in that, The first valve core includes: A first sealing plate extends perpendicular to the first direction and has a first protruding ring, a second outlet, a second guide hole, and the fourth wall surface; The second housing extends from the inner peripheral side of the outer periphery of the first sealing plate and the outer peripheral side of the second outlet gas in the positive direction of the first direction, and has the second air inlet. The second housing is inserted into the first guide hole in a manner that allows it to reciprocate along the first direction, and the second housing and the first sealing plate together define the second gas passage. The second valve core includes: The second sealing plate extends perpendicular to the first direction and has the second protruding ring; The rod extends in the negative direction of the first direction from the inner periphery of the outer periphery of the first sealing plate and is inserted into the second guide hole in a manner that allows it to reciprocate along the first direction.

8. The valve according to claim 7, characterized in that, The first elastic member is a helical spring that is sleeved outside the second housing and clamped between the first sealing plate and the second wall surface in the first direction; The second elastic member is a helical spring that is sleeved outside the rod and clamped between the second sealing plate and the fourth wall surface in the first direction.

9. The valve according to claim 1, characterized in that, Only one of the first gas channel and the second gas channel is provided with a gas processing agent.

10. The valve according to claim 1, characterized in that, One of the first gas channel and the second gas channel is provided with a first gas treatment agent, and the other is provided with a second gas treatment agent. The first gas treatment agent and the second gas treatment agent are different gas treatment agents.

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