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 present application relates to a valve. Background Art

[0002] Chinese patent document with publication number CN112361047 A discloses a bidirectionally breathable valve.

[0003] For the valve disclosed in the patent document, in the working states of forward ventilation and reverse ventilation, the gases in the two spaces (respectively the first space and the second space) located on the two opposite sides of the valve are exchanged through the same gas channel. However, this design is inappropriate in some application scenarios, such as such application scenarios: it is expected that the gas in the first space flows into the second space via a dedicated channel, and it is expected that the gas in the second space flows into the first space via another channel, wherein the dedicated channel can perform relevant processing on the gas, and the other channel does not perform relevant processing on the gas, or, the dedicated channel can perform a first processing on the gas, and the other channel performs a second processing on the gas that is different from the first processing. Summary of the invention

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

[0005] A valve, for selectively connecting or blocking a first space and a second space, 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 gas channel extending between the first air inlet and the first air outlet;

[0007] a first valve core, which is disposed in the first gas channel in a manner capable of moving between a first closed position and a first open position, and has a second gas inlet communicated with the second space, a second gas outlet communicated with the first space, and a second gas channel extending between the second gas inlet and the second gas outlet; in the first closed position, the first valve core is close to the first gas inlet and blocks the first gas channel, and in the first open position, the first valve core is away from the first gas inlet, so that the first gas inlet is communicated with the first gas outlet via the first gas channel;

[0008] a second valve core, which is arranged in the second gas channel in a manner capable of moving between a second closed position and a second open position; in the second closed position, the second valve core is close to the second gas inlet and blocks the second gas channel, and in the second open position, the second valve core is away from the second gas inlet, so that the second gas inlet is connected to the second gas outlet via the second gas channel;

[0009] a first elastic member applying force to the first valve core so as to bias the first valve core toward the first closed position;

[0010] a second elastic member applying force to the second valve core so as to bias 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; 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 implementations, the first air inlet, the first gas channel, and the first air outlet are arranged sequentially along a positive direction of a first direction, and the second air inlet, the second gas channel, and the second air outlet are arranged sequentially along a negative direction of the first direction.

[0013] In some possible implementations, the first gas channel surrounds the second gas channel in a circumferential direction around the first direction, and the two are separated from each other in the circumferential direction.

[0014] In some possible implementations, 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 that passes through from the outer surface of the valve body to the first gas channel in the first direction, and the first valve core is inserted into the guide hole in a manner that can move back and forth along the first direction. When observed along the first direction, the second air inlet completely falls into the first guide hole.

[0016] The first valve core has a second guide hole that passes through from the outer surface of the first valve core to the second gas channel in the first direction. The second valve core is inserted into the second guide hole in a manner that allows it to move back and forth along the first direction. When observed along the first direction, the second guide hole falls entirely into the first air inlet.

[0017] In some possible implementations, the first gas channel has a first wall and a second wall arranged in sequence 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 in sequence and opposite to each other along the negative direction of the first direction;

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

[0019] When viewed along the first direction, each of the first wall surface and the first convex ring surrounds the first air inlet on the entire circumference, and each of the third wall surface and the second convex ring surrounds the second air inlet on the entire circumference;

[0020] 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.

[0021] In some possible implementations, the first valve core includes:

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

[0023] a second shell extending from the inner peripheral side of the outer peripheral edge of the first sealing plate and the outer peripheral side of the second air outlet in the positive direction of the first direction and having the second air inlet;

[0024] wherein the second shell is inserted into the first guide hole in a manner capable of reciprocating along the first direction, and the second shell and the first sealing plate jointly define the second gas channel;

[0025] The second valve core comprises:

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

[0027] A rod portion extends toward the negative direction of the first direction on the inner peripheral side of the outer peripheral edge of the first sealing plate and is inserted into the second guide hole in a manner capable of reciprocating along the first direction.

[0028] In some possible implementations, the first elastic member is a coil spring that is sleeved outside the second shell and is sandwiched between the first sealing plate and the second wall surface in the first direction;

[0029] The second elastic member is a coil spring which is sleeved outside the rod portion and is sandwiched between the second sealing plate and the fourth wall surface in the first direction.

[0030] In some possible implementations, only one of the first gas channel and the second gas channel 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, and the first gas treatment agent and the second gas treatment agent are different gas treatment agents.

[0032] According to the valve provided by the present application, when the air pressure in the first space is higher than the air pressure in the second space by a specified value, the first valve core overcomes the elastic biasing force of the first elastic member under the action of the first air pressure difference between the first space and the second space and moves to the first open position, thereby allowing the gas in the first space to flow to the second space via the first gas channel. At this time, the second valve core is stabilized in the second closed position under the action of the second elastic member and the first air pressure difference, thereby being able to well prevent the gas in the first space from flowing into the second space via the second gas channel, that is, the gas in the first space can basically only flow into the second space via the first gas channel but not via the second gas channel, thereby achieving air pressure balance between the first space and the second space, and once the air pressures of the two spaces are balanced, the first valve core returns to the first closed position and blocks 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 specified value, the second valve core overcomes the elastic biasing force of the second elastic member and moves to the second open position under the action of the second air pressure difference between the second space and the first space, thereby allowing the gas in the second space to flow to the first space via 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, thereby effectively preventing the gas in the second space from flowing into the first space via the first gas channel, that is, the gas in the second space can basically only flow into the second space via the second gas channel but not via the first gas channel, thereby achieving air pressure balance between the second space and the first space. Once the air pressures of the two spaces are balanced, the second valve core returns to the second closed position and blocks the second gas channel again. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0035] Figure 1 It is a three-dimensional schematic diagram of a valve provided in one embodiment of the present application.

[0036] Figure 2 yes Figure 1 Side view of.

[0037] Figure 3 yes Figure 2 , and shows a first space and a second space.

[0038] Figure 4 yes Figure 2 Schematic diagram of the first valve core in the first open position.

[0039] Figure 5 yes Figure 2 Schematic diagram of the second valve core in the second open position.

[0040] Figure 6 yes Figure 1 Top view of the .

[0041] Figure 7 yes Figure 1 Bottom view of .

[0042] Description of reference numerals:

[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 shell, 8a-inner flange, 8a1-first wall, 8b-first air inlet, 9-first cover, 9a-first air outlet, 9b-first guide hole, 9c-second wall, 1a-first gas channel;

[0047] 2-first valve core, 10-first sealing plate, 10a-second air outlet, 10b-second guide hole, 10c-fourth wall, 10d-first convex ring, 11-second housing, 12-second cover, 12a-second air inlet, 12b-third wall, 2a-second gas channel;

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

[0049] 4-a first elastic member;

[0050] 5- a second elastic member;

[0051] 6- First space;

[0052] 7-The second space. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described below in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application. It can be understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0054] In the description of this application, if there are terms such as "first", "second", etc., they are only used to distinguish the objects described and do not have any order or technical meaning. Therefore, an object defined as "first", "second", etc. may explicitly or implicitly include one or more of the objects, and, for example, the term "first element" itself does not mean the existence of the "second element", and the term "second element" itself does not mean the existence of the "first element". In addition, "one" or "a" and similar words do not indicate a quantity limitation, but rather indicate the existence of at least one, and "multiple" means not less than two.

[0055] Figures 1 to 7 The valve provided in one embodiment of the present application is shown. The valve is a gas valve, which is used to selectively connect or block the first space 6 and the second space 7, so as to allow gas (for example, air) to flow and exchange between the first space 6 and the second space 7, or to prevent gas from flowing and exchanging between the first space 6 and the second space 7 as needed. In order to facilitate the description of the structure and function of the valve, Figures 3 to 5 Two dotted boxes respectively indicate the first space 6 and the second space 7.

[0056] In some application examples, the valve can be installed on industrial products such as battery packs (or car lights), which include a battery box and batteries. The second space 7 is defined by the battery box, and the batteries are housed in the second space 7 defined by the battery box. The first space 6 is the atmospheric environment in which the battery pack is located.

[0057] The valve mainly comprises a valve body 1 , a first valve core 2 , a second valve core 3 , a first elastic member 4 and a second elastic member 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 channel 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 with one end completely open and the other end having an inner flange 8a, and a first cover 9 detachably attached to the completely open end of the first housing 8, and the outer contour of the first housing 8 is a substantially cylindrical shape. The first air inlet 8b is a hole defined by the inner peripheral wall of the inner flange 8a and extending in the first direction DR1, and the first air outlet 9a and the first guide hole 9b are holes that penetrate the first cover 9 in the first direction DR1, that is, the first housing 8 has the first air inlet 8b, and the first cover 9 has the first air outlet 9a and the first guide hole 9b.

[0060] For convenience of description, the direction indicated by the arrow of the first direction DR1 is defined as the positive direction of the first direction DR1 , and the direction opposite to the positive direction, ie, 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, and a plurality of first air outlets 9a are provided, and the plurality of first air outlets 9a are evenly arranged around the first guide hole 9b and communicate with the first guide hole 9b, so that from the configuration, each first air outlet 9a is a depression radially concave outward from the hole wall of the first guide hole 9b. In other embodiments, the first air outlet 9a and the first guide hole 9b are separated from each other.

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

[0063] The first valve core 2 is arranged in the first gas channel 1a in a manner that it can move between the first closed position CP1 and the first open position OP1, and the first closed position CP1 and the first open position OP1 are arranged in sequence 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 separated from the first air outlet 9a, and the 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 leaves the first air inlet 8b, so that the first air inlet 8b is connected to the first air outlet 9a through the first gas channel 1a. At this time, the gas can flow and exchange between the first space 6 and the second space 7 through the first gas channel 1a. For example, the gas in the first space 6 can flow into the second space 7 through the first gas channel 1a.

[0064] In addition, the first valve core 2 has a second air inlet 12a connected to the second space 7, a second air outlet 10a connected to the first space 6 via the aforementioned first air inlet 8b, a second gas channel 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 connected to the second space 7 via the second guide hole 10b.

[0065] In detail, the outer contour of the first valve core 2 is formed to be roughly T-shaped when viewed from the side, and includes a first sealing plate 10 and a second shell 11, which together define the second gas channel 2a. The first sealing plate 10 extends perpendicularly to the first direction DR1 and has an outer periphery that is roughly circular in shape. The second air outlet 10a and the second guide hole 10b are both through holes that penetrate the first sealing plate 10 in the first direction DR1, that is, the first sealing plate 10 has the aforementioned second air outlet 10a and the second guide hole 10b. The second shell 11 extends from the inner peripheral side of the outer periphery of the first sealing plate 10 and the outer peripheral side of the second air outlet 10a in the positive direction of the first direction DR1, and has the aforementioned second air inlet 12a.

[0066] More specifically, the second shell 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 shell 11, and the 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 channel 2a and the second air outlet 10a are sequentially arranged along 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, and a plurality of second air outlets 10a are provided, and the plurality of second air outlets 10a are uniformly arranged around the second guide hole 10b and communicate with the second guide hole 10b, so that from the configuration, each second air outlet 10a is a depression radially concave outward from the hole wall of the second guide hole 10b. In other embodiments, the second air outlet 10a and the second guide hole 10b are separated from each other.

[0069] The second valve core 3 is arranged in the second gas channel 2a in a manner that it can move between the second closed position CP2 and the second open position OP2, and the second closed position CP2 and the second open position OP2 are arranged in sequence 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 channel 2a. At this time, the second air inlet 12a is separated from the second air outlet 10a, and the gas cannot flow and exchange between the first space 6 and the second space 7 through the second gas channel 2a. In the second open position OP2, the second valve core 3 leaves the second air inlet 12a, so that the second air inlet 12a is connected to the second air outlet 10a through the second gas channel 2a. At this time, the gas can flow and exchange between the first space 6 and the second space 7 through the second gas channel 2a. For example, the gas in the second space 7 can flow into the first space 6 through the second gas channel 2a.

[0070] In detail, the second valve core 3 is formed to be roughly T-shaped in a side view, and includes a second sealing plate 13 and a rod 14 connected as one. The second sealing plate 13 extends perpendicular to the first direction DR1 and has a roughly circular periphery. The rod 14 extends from the inner peripheral side of the outer periphery of the first sealing plate 10 toward the negative direction of the first direction DR1. The rod 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 in and removed from the first gas passage 1a. Also, 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 in and removed from the second gas passage 2a.

[0072] The first elastic member 4 applies force to the first valve core 2 so as to bias the first valve core 2 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 coil spring that is sleeved outside the second housing 11 and is sandwiched between the first sealing plate 10 and the first cover 9 (specifically, the second wall surface 9c defined by the first cover 9 described later) in the first direction DR1.

[0073] The second elastic member 5 applies force to the second valve core 3 so as to bias the second valve core 3 toward the second closed position CP2. That is, the second elastic member 5 has a tendency to open the second gas passage 2a of the second valve core 3. Specifically, the second elastic member 5 is another coil spring that is sleeved outside the rod portion 14 and is sandwiched 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 in the first direction DR1.

[0074] The air pressure in the first space 6 biases the first valve element 2 toward the first open position OP1 and the second valve element 3 toward the second closed position CP2. That is, the air pressure in the first space 6 tends to cause the first valve element 2 to release the first gas passage 1a and the second valve element 3 to block the second gas passage 2a.

[0075] Similarly, the air pressure of 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 of the second space 7 has a tendency to cause the second valve core 3 to unblock the second gas channel 2a and the first valve core 2 to block the first gas channel 1a.

[0076] Therefore, when the air pressure of the first space 6 is higher than the air pressure of the second space 7 by a specified value (for example, the specified value is 500 Pa), the first valve core 2 overcomes the elastic biasing force of the first elastic member 4 and moves to the first open position OP1 under the action of the air pressure difference between the first space 6 and the second space 7 (for convenience of explanation, referred to as the first air pressure difference), thereby allowing the gas in the first space 6 to flow to the second space 7 via the first gas channel 1a. At this time, the second valve core 3 is stabilized in the second closed position CP2 under the action of the second elastic member 5 and the first air pressure difference, thereby preventing the gas in the first space 6 from flowing into the second space 7 via the second gas channel 2a, that is, the gas in the first space 6 can basically only flow into the second space 7 via the first gas channel 1a but not via the second gas channel 2a. It can be understood that the opened first gas channel 1a can achieve air pressure balance between the first space 6 and the second space 7. Once the air pressures of the two are balanced, that is, the air 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 channel 1a again.

[0077] Similar to the above situation, when the air pressure of the second space 7 is higher than the air pressure of the first space 6 by a specified value (for example, the specified value is 400Pa), the second valve core 3 overcomes the elastic biasing force of the second elastic member 5 and moves to the second open position OP2 under the action of the air pressure difference between the second space 7 and the first space 6 (for convenience of explanation, referred to as the second air pressure difference), thereby allowing the gas in the second space 7 to flow to the first space 6 via 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, thereby preventing the gas in the second space 7 from flowing into the first space 6 via the first gas channel 1a, that is, the gas in the second space 7 can basically only flow into the second space 7 via the second gas channel 2a but not via the first gas channel 1a. It can be understood that the opened second gas channel 2a can achieve air pressure balance between the second space 7 and the first space 6. Once the air pressures of the two are balanced, that is, the air 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 channel 2a again.

[0078] This design is advantageous:

[0079] For example, in some application scenarios, the second space 7 has relevant requirements for certain indicators of the gas therein (for example, humidity), but has no such requirements for the gas in the first space 6 (especially when the first space 6 is an atmospheric environment). In this regard, a gas treatment agent (for example, a desiccant) can be arranged in the first gas channel 1a without the need to arrange 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. 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 faster due to the continuous treatment of the gas in the first space 6 (because the first space 6 and the second gas channel 2a are always connected via the second gas outlet 10a), especially when the first space 6 is a large space such as an atmospheric environment; and on the other hand, since the gas in the second space 7 will not flow into the gas in the first space 6 via the first gas channel 1a with the gas treatment agent, it will not cause ineffective operation of the gas treatment agent in the first gas channel 1a.

[0080] For another example, in some other application scenarios, the first space 6 has relevant requirements for a first indicator of the gas therein (for example, humidity), while the second space 7 has relevant requirements for a second indicator of the gas therein (for example, odor). To this end, 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 processed by the second gas treatment agent before entering the second space 7, thereby satisfying the second gas indicator requirement of the second space 7. On the other hand, the gas from the second space 7 is processed by the first gas treatment agent before entering the first space 6, thereby satisfying the first gas indicator requirement of the first space 6, and helping to save the usage of the first gas treatment agent and the second gas treatment agent.

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

[0082] Combined with the above description and attached Figures 1 to 7 It can be seen that the first guide hole 9b penetrates from the outer surface of the valve body 1 to the first gas channel 1a in the first direction DR1, and the first valve core 2 is inserted into the first guide hole 9b in a manner that it can 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 a sufficiently large activity space for the first valve body 1 - for example, a part of the first valve body 1 can extend from the first guide hole 9b, thereby avoiding the enlargement of the valve body.

[0083] The second guide hole 10b is passed through from the outer surface of the first valve core 2 to the second gas passage 2a in the first direction DR1, and the second valve core 3 is inserted into the second guide hole 10b in a manner that it can move back and forth along the first direction DR1. Therefore, by means of the second guide hole 10b on the first valve core 2, not only can the second valve core 3 be smoothly guided to move 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 activity space for the second valve body 1, thereby avoiding the enlargement of the valve body.

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

[0085] The first gas channel 1a has a first wall 8a1 and a second wall 9c arranged in sequence and opposite to each other in the positive direction of the first direction DR1, and the first wall 8a1 and the second wall 9c are defined by the inner flange 8a and the first cover 9, respectively. In addition, the first wall 8a1 surrounds the first air inlet 8b on the 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 8a1), the first wall 8a1 faces the positive direction of the first direction DR1, and the second wall 9c faces the negative direction of the first direction DR1. The coil spring as the first elastic member 4 has its two ends abutted against the first wall 8a1 and the second wall 9c, respectively.

[0086] The second gas channel 2a has a third wall 12b and a fourth wall 10c arranged in sequence and opposite to each other along the negative direction of the first direction DR1, and the third wall 12b and the fourth wall 10c are defined by the second cover 12 and the first sealing plate 10, respectively. In addition, the third wall 12b surrounds the second air inlet 12a on the 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 12b), the third wall 12b faces the negative direction of the first direction DR1, and the fourth wall 10c faces the positive direction of the first direction DR1. The coil spring as the second elastic member 5 has its two ends abutted against the third wall 12b and the fourth wall 10c, respectively.

[0087] The first valve core 2 has a first convex ring 10d protruding in the negative direction of the first direction DR1, and the second valve core 3 has a second convex ring 13a protruding in the positive direction of the first direction DR1. The first convex ring 10d and the second convex ring 13a can be elastic structures that can be elastically deformed after being subjected to force, such as rubber rings. When observed along the first direction DR1 (corresponding to the projection of the relevant elements on the first direction DR1), the first convex ring 10d surrounds the first air inlet 8b, the second air outlet 10a and the second guide hole 10b on the entire circumference, and the second convex ring 13a surrounds the second air inlet 12a on the 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 is in a state of elastic compression deformation and seals against the first wall 8a1 in the negative direction of the first direction DR1, thereby blocking the first gas channel 1a, that is, blocking the airflow path of the first gas channel 1a. The first convex ring 10d can well ensure the sealing of the first valve core 2 pressing against the first wall 8a1, and improve the sealing strength of the first valve core 2 against the first gas channel 1a. In other embodiments, the first convex ring 10d can also be omitted, and the plane surface of the first sealing plate 10 can be directly abutted against the first wall 8a1 to block the first gas channel 1a. In some 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 channel 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, so that the first air inlet 8b is connected to the first air outlet 9a via 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 is in a state of elastic compression deformation and positively seals against the third wall 12b along the first direction DR1, thereby blocking the second gas channel 2a, that is, blocking the airflow path of the second gas channel 2a. The second convex ring 13a can well ensure the sealing of the second valve core 3 pressing against the third wall 12b, and improve the sealing strength of the second valve core 3 against the second gas channel 2a. In other embodiments, the second convex ring 13a can also be omitted, and the planar surface of the second sealing plate 13 can be directly abutted against the third wall 12b to block the second gas channel 2a. In some 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 channel 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, so that the second air inlet 12a is connected to the second air outlet 10a via the second gas channel 2a.

[0092] Please also refer to Figures 3 to 5The first gas channel 1a has an inner circumferential wall around 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) along the first direction DR1 in the first gas channel 1a, a first air gap D1 is formed between the inner circumferential wall of the first air passage and the first valve core 2. Therefore, once the first convex ring 10d leaves the first wall surface 8a1, the first gas channel 1a is open. The second gas channel 2a has an inner circumferential wall around 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) along the first direction DR1 in the first gas channel 1a, a second air gap D2 located on the outer peripheral side of the second valve core 3 is formed between the inner circumferential wall of the second air passage and the second valve core 3. Therefore, once the first convex ring 10d leaves the first wall surface 8a1, the first gas channel 1a is open. 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 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 air gap D1 and the second air gap D2 can be a continuously extending annular gap or a discontinuously extending annular gap. For example, the inner peripheral wall of the first gas channel 1a has a plurality of guide grooves extending linearly along the first direction DR1 and arranged at intervals around the first direction DR1, and the first valve core 2 has a plurality of protrusions extending outward from the outer peripheral edge of the first sealing plate 10 and arranged at intervals around the first direction DR1, and the plurality of protrusions are respectively slidably engaged in the plurality of guide grooves, so that the movement of the first valve core 2 is guided by the cooperation between the protrusions and the guide grooves, and thereby the first air gap D1 is formed as a discontinuously extending annular gap.

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

Claims

1. A valve for selectively connecting or blocking a first space and a second space, characterized in that: The valve comprises: 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 gas channel extending between the first air inlet and the first air outlet; a first valve core, which is disposed in the first gas channel in a manner capable of moving between a first closed position and a first open position, and has a second gas inlet communicated with the second space, a second gas outlet communicated with the first space, and a second gas channel extending between the second gas inlet and the second gas outlet; in the first closed position, the first valve core is close to the first gas inlet and blocks the first gas channel, and in the first open position, the first valve core is away from the first gas inlet, so that the first gas inlet is communicated with the first gas outlet via the first gas channel; a second valve core, which is arranged in the second gas channel in a manner capable of moving between a second closed position and a second open position; in the second closed position, the second valve core is close to the second gas inlet and blocks the second gas channel, and in the second open position, the second valve core is away from the second gas inlet, so that the second gas inlet is connected to the second gas outlet via the second gas channel; a first elastic member applying force to the first valve core so as to bias the first valve core toward the first closed position; a second elastic member applying force to the second valve core so as to bias the second valve core toward the second closed position; 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; 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.

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 in sequence along a positive direction of a first direction, and the second air inlet, the second gas channel and the second air outlet are arranged in sequence along a negative direction of the first direction.

3. The valve according to claim 2, characterized in that The first gas channel surrounds the second gas channel in a circumferential direction around 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 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.

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 channel in the first direction, the first valve core is inserted into the guide hole in a manner capable of reciprocating along the first direction, and when viewed along the first direction, the second gas inlet is completely within the first guide hole; The first valve core has a second guide hole that passes through from the outer surface of the first valve core to the second gas channel in the first direction. The second valve core is inserted into the second guide hole in a manner that allows it to move back and forth along the first direction. When observed along the first direction, the second guide hole falls entirely into the first air inlet.

6. The valve according to claim 5, characterized in that The first gas channel has a first wall and a second wall arranged in sequence 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 in sequence and opposite to each other along the negative direction of the first direction; The first valve core has a first convex ring protruding in the negative direction of the first direction, and the second valve core has a second convex ring protruding in the positive direction of 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 the entire circumference, and each of the third wall surface and the second convex ring surrounds the second air inlet on the 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 comprises: a first sealing plate extending perpendicular to the first direction and having the first convex ring, the second air outlet, the second guide hole and the fourth wall surface; a second shell extending from the inner peripheral side of the outer peripheral edge of the first sealing plate and the outer peripheral side of the second air outlet in the positive direction of the first direction and having the second air inlet; wherein the second shell is inserted into the first guide hole in a manner capable of reciprocating along the first direction, and the second shell and the first sealing plate jointly define the second gas channel; The second valve core comprises: a second sealing plate extending perpendicularly to the first direction and having the second convex ring; A rod portion extends toward the negative direction of the first direction on the inner peripheral side of the outer peripheral edge of the first sealing plate and is inserted into the second guide hole in a manner capable of reciprocating along the first direction.

8. The valve according to claim 7, characterized in that The first elastic member is a coil spring sleeved outside the second shell and sandwiched between the first sealing plate and the second wall surface in the first direction; The second elastic member is a coil spring which is sleeved outside the rod portion and is sandwiched 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 treatment 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 of the first gas channel is provided with a second gas treatment agent, and the first gas treatment agent and the second gas treatment agent are different gas treatment agents.

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