Gas generating device and flotation equipment

Abstract

The present invention discloses a gas generating device and a floating device, comprising a cavity, wherein the cavity is formed with a gas storage cavity, a reaction cavity, a flow guide cavity and a water inlet, wherein the reaction cavity is at least divided into a first sub-cavity for accommodating a first reactant and a second sub-cavity for accommodating a second reactant, the flow guide cavity is used to connect the first sub-cavity with the water inlet, and the second reactant is accommodated in the flow guide cavity; the cavity has a first on-off structure for switching the flow guide cavity and the first sub-cavity, a second on-off structure for switching the first sub-cavity and the second sub-cavity, and a third on-off structure for switching the second sub-cavity and the gas storage cavity; the first on-off structure is switched on under the action of water pressure in the flow guide cavity, the second on-off structure is switched on under the action of air pressure and / or water pressure in the first sub-cavity, and the third on-off structure is switched on under the action of air pressure and / or water pressure in the reaction cavity, thereby solving the technical problem that the existing gas generating device has a slow reaction due to the reactants being stored together, thereby failing to effectively produce gas when used.

Description

Technical Field

[0001] The present invention relates to the technical field of lifesaving equipment, and in particular to a gas generating device and a floating device. Background Art

[0002] The frequent occurrence of drowning deaths requires that the emergency and practicality of life-saving equipment be continuously improved. In response to this, the prior art provides some life-saving equipment such as life-saving bracelets or life vests equipped with high-pressure compressed gas cylinders to achieve life-saving. The high-pressure gas cylinder is punctured by a triggering needle, so that the gas fills the airbag, thereby generating buoyancy to lift the drowning person. However, the high-pressure gas cylinder itself is large in size and has safety hazards, making it inconvenient to use. Therefore, a chemical gas production method is generally used to inflate the airbag. When a chemical gas production method is used, two reactants are generally used to react with water to produce gas. If the two reactants are stored together, the two reactants will react slowly during the storage process, causing the device to fail. Summary of the invention

[0003] Based on this, the present invention provides a gas generating device and a floating device to solve the technical problem in the prior art that the gas generating device reacts slowly due to the reactants being stored together, resulting in failure to effectively produce gas during use.

[0004] In a first aspect, the present invention provides a gas generating device, which stores reactants to expand by generating gas when exposed to water, wherein the reactants include at least a first reactant and a second reactant, including:

[0005] A cavity, wherein the cavity is formed with an air storage cavity, a reaction cavity, a flow guide cavity and a water inlet, the air storage cavity is used to inflate the cavity, the reaction cavity is at least divided into a first sub-cavity for accommodating the first reactant and a second sub-cavity for accommodating the second reactant, the flow guide cavity is used to connect the first sub-cavity with the water inlet, and the second reactant is accommodated in the flow guide cavity; the cavity has a first on-off structure for connecting and disconnecting the flow guide cavity and the first sub-cavity, a second on-off structure for connecting and disconnecting the first sub-cavity and the second sub-cavity, and a third on-off structure for connecting and disconnecting the second sub-cavity and the air storage cavity;

[0006] Among them, the first on-off structure is turned on under the action of water pressure in the guide chamber, the second on-off structure is turned on under the action of air pressure and / or water pressure in the first sub-chamber, and the third on-off structure is turned on under the action of air pressure and / or water pressure in the reaction chamber.

[0007] In an embodiment of the gas generating device, the second on-off structure and the third on-off structure are both weak connection structures;

[0008] When the air pressure in the first sub-chamber reaches a first preset air pressure, the first on-off structure is opened by the air pressure in the first sub-chamber; when the air pressure in the reaction chamber reaches a second preset air pressure, the third on-off structure is opened by the air pressure in the reaction chamber.

[0009] In an embodiment of the gas generating device, the second preset gas pressure is greater than the first preset gas pressure.

[0010] In an embodiment of the gas generating device, in a first direction, the length of the first sub-cavity is greater than the length of the second sub-cavity, and the first direction is from the first sub-cavity toward the second sub-cavity.

[0011] In an embodiment of the gas generating device, the first sub-chamber and the second sub-chamber are separated by a vacuum section, the vacuum section is a second on-off structure, and the third on-off structure is a weak connection structure;

[0012] When water flows into the first sub-chamber, the vacuum of the second on-off structure is released; when the air pressure in the reaction chamber reaches a preset air pressure, the third on-off structure is opened by the air pressure in the reaction chamber.

[0013] In an embodiment of the gas generating device, in the extension direction of the central axis of the water inlet, the width of the flow guide cavity is smaller than the width of the reaction cavity.

[0014] In an embodiment of the gas generating device, the first on-off structure is a film one-way valve.

[0015] In an embodiment of the gas generating device, the first reactant is an acidic reactant, and the second reactant is an alkaline reactant.

[0016] In an embodiment of the gas generating device, the gas generating device further comprises a second one-way valve disposed at the water inlet;

[0017] The gas generating device also includes a water pumping structure, which includes a water pump having a first drainage port and a second drainage port and a switch electrically connected to the water pump; the first drainage port is used to introduce external water, and the second drainage port is connected to the second one-way valve.

[0018] A second aspect of the present invention provides a floating device, wherein the floating device comprises the gas generating device as described in the first aspect.

[0019] The embodiments of the present invention have the following beneficial effects:

[0020] In the present invention, the reaction chamber is divided into a first sub-chamber and a second sub-chamber to store the first reactant and the second reactant, respectively. Specifically, when external water is introduced into the diversion chamber through the water inlet, the second reactant in the diversion chamber dissolves in water, and at this time, there will be water pressure in the diversion chamber, and the first on-off structure is turned on under the action of the water pressure, and the water dissolved with the second reactant will flow from the diversion chamber to the first sub-chamber; therefore, there will be water pressure in the first sub-chamber, and at the same time, the second reactant contained in the diverted water will react with the first reactant to produce gas, so that air pressure is generated in the first sub-chamber, that is, the second on-off structure can be turned on by the action of the water pressure and / or air pressure in the first sub-chamber, so that the first reactant in the first sub-chamber and the second reactant in the second sub-chamber can meet and react to produce gas, that is, the entire reaction chamber is filled with gas and there is air pressure, and the third on-off structure is turned on, so that the gas is continuously diffused to the gas storage chamber, thereby causing the cavity to expand. The technical solution can be used to store multiple reactants separately and ensure that they can contact and react smoothly when used, thereby solving the technical problem in the prior art that the gas generating device reacts slowly due to the reactants being stored together, resulting in the inability to effectively produce gas when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] in:

[0023] Figure 1 The figure shows the overall structure of the gas generating device provided according to the embodiment of the present invention.

[0024] Description of main component symbols:

[0025] 100. Gas generating device; 10. Cavity; 10a. Water inlet; 10b. First on-off structure; 10c. Second on-off structure; 10d. Third on-off structure; 11. First cavity; 111. Gas storage cavity; 12. Second cavity; 121. Reaction cavity; 1211. First sub-cavity; 1212. Second sub-cavity; 13. Third cavity; 131. Diversion cavity; 20. Second one-way valve; 30. Pumping structure; 31. Water pump; 32. Switch; 33. Waterproof cover; 41. First reactant; 42. Second reactant. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] The present invention provides a gas generating device 100 and a floating device having the gas generating device 100, wherein the floating device can specifically be a life-saving device such as a life-saving bracelet and a life-saving vest to achieve drowning rescue, and the floating device can also be a buoyancy auxiliary device for swimming. When the user is physically exhausted during swimming, the user can use the buoyancy of the floating device to assist swimming; it should be noted that the specific application of the floating device includes but is not limited to this.

[0031] See also Figure 1The gas generating device 100 stores reactants to expand by generating gas when in contact with water, and the reactants include at least a first reactant 41 and a second reactant 42. Specifically, the gas generating device 100 includes a cavity 10, and the cavity 10 is formed with a gas storage cavity 111, a reaction cavity 121, a flow guide cavity 131, and a water inlet 10a. The gas storage cavity 111 is used to inflate the cavity 10, and the reaction cavity 121 is at least divided into a first sub-cavity 1211 for accommodating the first reactant 41 and a second sub-cavity 1212 for accommodating the second reactant 42. The flow guide cavity 131 is used to connect the first sub-cavity 1211 with the water inlet 10a, and the second reactant 42 is accommodated in the flow guide cavity 131; the cavity 10 has The first on-off structure 10b for connecting the flow-guiding chamber 131 with the first sub-chamber 1211, the second on-off structure 10c for connecting the first sub-chamber 1211 with the second sub-chamber 1212, and the third on-off structure 10d for connecting the second sub-chamber 1212 with the gas storage chamber 111; the first on-off structure 10b is turned on under the action of water pressure in the flow-guiding chamber 131, the second on-off structure 10c is opened under the action of air pressure or water pressure in the first sub-chamber 1211, and the third on-off structure 10d is opened under the action of air pressure or water pressure in the reaction chamber 121. It should be noted that when water is not introduced into the flow-guiding chamber 131, the first on-off structure 10b, the second on-off structure 10c, and the third on-off structure 10d are all in a cut-off state, that is, the flow-guiding chamber 131, the first sub-chamber 1211, the second sub-chamber 1212, and the gas storage chamber 111 are not connected to each other.

[0032] In the present invention, the reaction chamber 121 is divided into a first sub-chamber 1211 and a second sub-chamber 1212 to store the first reactant 41 and the second reactant 42, respectively. Specifically, when external water is introduced into the diversion chamber 131 through the water inlet 10a, the second reactant 42 in the diversion chamber 131 dissolves in water. At this time, there will be water pressure in the diversion chamber 131, and the first on-off structure 10b will be turned on under the action of the water pressure, and the water dissolved with the second reactant 42 will flow from the diversion chamber 131 to the first sub-chamber 1211; therefore, there will be water pressure in the first sub-chamber 1211, and at the same time, the second reactant 42 contained in the diverted water will react with the first reactant 41 to produce gas, so that gas pressure is generated in the first sub-chamber 1211, that is, the second on-off structure 10c The conduction can be achieved through the action of water pressure and / or air pressure in the first sub-chamber 1211, so that the first reactant 41 in the first sub-chamber 1211 and the second reactant 42 in the second sub-chamber 1212 can meet and react to produce gas, that is, the entire reaction chamber 121 is filled with gas and there is air pressure, and the third on-off structure 10d is turned on, so that the gas continues to diffuse to the gas storage chamber 111, thereby causing the chamber 10 to expand; or the third on-off structure 10d is turned on by water pressure, so that the first reactant 41 and the second reactant 42 flow into the gas storage chamber 111 to continue to react. The use of this technical solution can store multiple reactants separately and ensure that they can contact and react smoothly when used, solving the technical problem in the prior art that the gas generating device 100 reacts slowly due to the reactants being stored together, thereby failing to effectively produce gas when used.

[0033] The second reactant 42 in the flow guiding chamber 131 is used to react with the first reactant 41 in the first sub-chamber 1211 to produce gas, that is, the air pressure of the first sub-chamber 1211 is only used to conduct the second on-off structure 10c, therefore, only a small amount of the second reactant 42 needs to be placed in the flow guiding chamber 131; the air pressure of the first reactant 41 in the first sub-chamber 1211 and the second reactant 42 in the second sub-chamber 1212 to produce gas not only needs to conduct the third on-off structure 10d, but also needs to diffuse to the gas storage chamber 111 and ensure that the gas can expand the cavity 10, therefore, a large amount of the first reactant 41 needs to be placed in the first sub-chamber 1211, and a large amount of the second reactant 42 needs to be placed in the second sub-chamber 1212 to react and produce a large amount of gas. That is, the storage amount of the second reactant 42 in the second sub-chamber 1212 is far more than the storage amount of the second reactant 42 in the flow guiding chamber 131.

[0034] In one embodiment, the first reactant 41 is an acidic reactant, such as malic acid, citric acid, tartaric acid solid, etc.; the second reactant 42 is an alkaline reactant, such as potassium bicarbonate, potassium carbonate or sodium carbonate, etc. Since there is a difference in solubility between the acidic reactant and the alkaline reactant, that is, the acidic reactant has a larger solubility; and the alkaline reactant is easy to agglomerate and release more heat when reacting with a small amount of water, therefore, the first reactant 41 (acidic reactant) is stored in the first sub-chamber 1211, most of the second reactant 42 (alkaline reactant) is stored in the second sub-chamber 1212, and a small amount of the second reactant 42 (alkaline reactant) is stored in the diversion chamber 131.

[0035] In some specific embodiments, if about 3.3L of gas needs to be produced, in order to achieve a better gas production rate and a smaller reactant mass volume, the ratio of the reactants is: the flow guide chamber 131 stores 0.8-2g of potassium bicarbonate, the first sub-chamber 1211 stores 5g of malic acid, and the second sub-chamber 1212 stores 5.4-6.6g of potassium bicarbonate.

[0036] The cavity 10 may be made of an aluminum-plastic film material with a low water vapor permeability to achieve moisture-proof storage and facilitate storage and folding; and the materials used to make the cavity 10 include but are not limited to these.

[0037] In one embodiment, the chamber 10 includes a first chamber 11 forming an air storage chamber 111 , a second chamber 12 forming a reaction chamber 121 , and a third chamber 13 forming a flow guiding chamber 131 , and both the second chamber 12 and the third chamber 13 are placed in the air storage chamber 111 .

[0038] In some specific embodiments, the third cavity 13 is an elongated structure, which is conducive to accelerating the water flow; the second cavity 12 is an elongated structure to ensure that when the gas expands the second cavity 12, the space for accumulating reactants is smaller, thereby accelerating the reaction; the first cavity 11 is an elongated structure, and when the gas diffuses to the gas storage cavity 111 to expand the first cavity 11, the space for accumulating reactants is also smaller, which can also accelerate the reaction.

[0039] In one embodiment, the second on-off structure 10c and the third on-off structure 10d are both weak connection structures; when the air pressure in the first sub-chamber 1211 reaches the first preset air pressure, the first on-off structure 10b is opened by the air pressure in the first sub-chamber 1211; when the air pressure in the reaction chamber 121 reaches the second preset air pressure, the third on-off structure 10d is opened by the air pressure in the reaction chamber 121. The weak connection structure refers to a structure that is in a sealed state when not affected by external forces and can be turned on by external forces; in this embodiment, the second on-off structure 10c and the third on-off structure 10d are set as weak connection structures, so the conduction diameter between the first sub-chamber 1211 and the second sub-chamber 1212 can be adjusted by adjusting the size of the second on-off structure 10c, and the conduction diameter between the second sub-chamber 1212 and the gas storage chamber 111 can be adjusted by adjusting the size of the third on-off structure 10d. Specifically, when the first sub-cavity 1211 and the second sub-cavity 1212 do not generate air pressure, the second on-off structure 10c and the third on-off structure 10d with a weak connection structure are both in a sealed state. When the second sub-cavity 1212 generates air pressure and the air pressure reaches the first preset air pressure, the second on-off structure 10c is opened by the air pressure, so that the first sub-cavity 1211 and the second sub-cavity 1212 are connected to form a reaction chamber 121. By adopting the third on-off structure 10d with a weak connection structure, the first reactant 41 and the second reactant 42 are confined to the reaction chamber 121 to react and produce gas to ensure that the two are dissolved and mixed evenly, so that the air pressure in the reaction chamber 121 reaches the second preset air pressure, and the third on-off structure 10d is opened by the air pressure, thereby inflating the air storage chamber 111 to expand the cavity 10.

[0040] The second preset air pressure is greater than the first preset air pressure. For example, if calculated by tension, the tension for pulling the first weak connection structure apart is 5-7 N, and the tension for pulling the second weak connection structure apart is 8-11 N. On the one hand, it ensures that the second on-off structure 10c can be opened smoothly, so that the first reactant 41 and the second reactant 42 can be contacted and reacted; on the other hand, it ensures that the contact reaction time of the first reactant 41 and the second reactant 42 is long after the first sub-cavity 1211 and the second sub-cavity 1212 are connected, so that the first reactant 41 and the second reactant 42 can be fully mixed.

[0041] In some specific embodiments, in the first direction, the length of the first sub-cavity 1211 is greater than the length of the second sub-cavity 1212, and the first direction is from the first sub-cavity 1211 to the second sub-cavity 1212. Limiting the lengths of the first sub-cavity 1211 and the second sub-cavity 1212 is conducive to the rapid reaction of the first reactant 41 and the second reactant 42 to sequentially open the second on-off structure 10c and the third on-off structure 10d, thereby quickly inflating.

[0042] In a direction perpendicular to the first direction, the width of the first sub-cavity 1211 is equal to the width of the second sub-cavity 1212. For example, when the widths of the first sub-cavity 1211 and the second sub-cavity 1212 are both 4 cm, the second sub-cavity 1212 is 6 cm long, and the third sub-cavity is 4 cm long.

[0043] In some specific embodiments, the first on-off structure 10b is a thin film one-way valve. By setting the first on-off structure 10b as a thin film structure, on the one hand, it can be folded to reduce the occupied space, and on the other hand, it can ensure that the first on-off structure 10b can be smoothly conducted by water pressure, and at the same time prevent the gas in the second sub-cavity 1212 from flowing back into the guide cavity 131, which is conducive to flushing the second conduction structure.

[0044] It should be noted that the first on-off structure 10b can also be configured as a one-way valve in other forms.

[0045] In another embodiment, the first sub-chamber 1211 and the second sub-chamber 1212 are separated by a vacuum section, the vacuum section is the second on-off structure 10c, and the third on-off structure 10d is a weak connection structure; when water flows into the first sub-chamber 1211, the vacuum of the second on-off structure 10c is released; when the air pressure in the reaction chamber 121 reaches a preset air pressure, the third on-off structure 10d is opened by the air pressure in the reaction chamber 121. Therefore, when the water in the diversion chamber 131 flows into the first sub-chamber 1211, the vacuum section is released, that is, the second on-off structure 10c is turned on, that is, the first sub-chamber 1211 and the second sub-chamber 1212 are connected, and the first reactant 41 and the second reactant 42 contact and react; at the same time, the third on-off structure 10d is a weak connection structure, and only when the air pressure in the reaction chamber 121 reaches the preset air pressure, the third on-off structure 10d is opened, thereby ensuring that the first reactant 41 and the second reactant 42 are fully dissolved and mixed evenly. Among them, the weak connection structure refers to a structure that is in a sealed state without external force and can be conductive when subjected to external force.

[0046] In some specific embodiments, the first on-off structure 10b is a thin film one-way valve. By setting the first on-off structure 10b as a thin film structure, on the one hand, it can be folded to reduce the occupied space, and on the other hand, it can ensure that the first on-off structure 10b can be smoothly conducted by water pressure, and at the same time prevent the gas in the reaction chamber 121 from flowing back into the guide chamber 131, which is conducive to flushing the third conduction structure.

[0047] It should be noted that the first on-off structure 10b can also be configured as a one-way valve in other forms.

[0048] In one embodiment, the third on-off structure 10d can also use water pressure to achieve conduction, such as setting the third on-off structure 10d to be vacuumed. When water enters the second sub-chamber 1212, vacuum contact is created, and the third on-off structure 10d is turned on. The first reactant 41 and the second reactant 42 can flow into the gas storage chamber 111 to continue reacting.

[0049] In one embodiment, the water inlet 10a and the first on-off structure 10b are relatively located at the two ends of the guide cavity 131, thereby accelerating the speed of water flowing through the guide cavity 131. On the one hand, the water pressure can be increased to conduct the first on-off structure 10b, and on the other hand, the residual amount of solid reactants in the guide cavity 131 can be reduced.

[0050] In one embodiment, in the extension direction of the central axis of the water inlet 10a, the width of the guide cavity 131 is smaller than the width of the reaction cavity 121. That is, the width of the water flowing through the guide cavity 131 is narrowed, the water flow speed is accelerated, and the water pressure can be further increased to conduct the first on-off structure 10b, while further reducing the residual amount of solid reactants in the guide cavity 131.

[0051] In one embodiment, the gas generating device 100 further includes a second one-way valve 20 disposed at the water inlet 10a. The second one-way valve 20 ensures that water can only flow into the diversion cavity 131 and cannot flow back out of the diversion cavity 131.

[0052] In one embodiment, the gas generating device 100 further includes a pumping structure 30, which includes a water pump 31 having a first drainage port and a second drainage port and a switch 32 electrically connected to the water pump 31; the first drainage port is used to introduce external water, and the second drainage port is connected to the second one-way valve 20. That is, in this embodiment, water is pumped into the diversion cavity 131 by the water pump 31; wherein the switch 32 is used to control the operation of the water pump 31, and the switch 32 can be triggered manually or automatically identify the risk of drowning.

[0053] In some specific embodiments, the water pumping structure 30 further includes a waterproof cover 33 for covering the first drainage port.

[0054] It should be noted that the gas generating device 100 can also use a negative pressure method to suck water into the guide cavity 131.

[0055] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A gas generating device, which stores reactants to expand by generating gas when in contact with water, wherein the reactants include at least a first reactant and a second reactant, characterized in that: include: A cavity, wherein the cavity is formed with an air storage cavity, a reaction cavity, a flow guide cavity and a water inlet, the air storage cavity is used to inflate the cavity, the reaction cavity is at least divided into a first sub-cavity for accommodating the first reactant and a second sub-cavity for accommodating the second reactant, the flow guide cavity is used to connect the first sub-cavity with the water inlet, and the second reactant is accommodated in the flow guide cavity; the cavity has a first on-off structure for connecting and disconnecting the flow guide cavity and the first sub-cavity, a second on-off structure for connecting and disconnecting the first sub-cavity and the second sub-cavity, and a third on-off structure for connecting and disconnecting the second sub-cavity and the air storage cavity; Wherein, the first on-off structure is turned on under the action of water pressure in the diversion chamber, the second on-off structure is turned on under the action of air pressure and / or water pressure in the first sub-chamber, and the third on-off structure is turned on under the action of air pressure and / or water pressure in the reaction chamber; When no water is introduced into the diversion chamber, the first on-off structure, the second on-off structure and the third on-off structure are all in a cut-off state, and the diversion chamber, the first sub-chamber, the second sub-chamber and the air storage chamber are not connected to each other.

2. The gas generating device according to claim 1, characterized in that: The second on-off structure and the third on-off structure are both weak connection structures; When the air pressure in the first sub-chamber reaches a first preset air pressure, the first on-off structure is opened by the air pressure in the first sub-chamber; When the air pressure in the reaction chamber reaches a second preset air pressure, the third on-off structure is opened by the air pressure in the reaction chamber.

3. The gas generating device according to claim 2, characterized in that: The second preset air pressure is greater than the first preset air pressure.

4. The gas generating device according to claim 2, characterized in that: In a first direction, the length of the first sub-cavity is greater than the length of the second sub-cavity, and the first direction is from the first sub-cavity toward the second sub-cavity.

5. The gas generating device according to claim 1, characterized in that: The first sub-cavity and the second sub-cavity are separated by a vacuum section, the vacuum section is the second on-off structure, and the third on-off structure is a weak connection structure; When water flows into the first sub-chamber, the vacuum of the second on-off structure is released; when the air pressure in the reaction chamber reaches a preset air pressure, the third on-off structure is opened by the air pressure in the reaction chamber.

6. The gas generating device according to claim 1, characterized in that: In the extension direction of the central axis of the water inlet, the width of the guide cavity is smaller than the width of the reaction cavity.

7. The gas generating device according to claim 1, characterized in that: The first on-off structure is a thin film one-way valve.

8. The gas generating device according to claim 1, characterized in that: The first reactant is an acidic reactant, and the second reactant is a basic reactant.

9. The gas generating device according to claim 1, characterized in that: The gas generating device further comprises a second one-way valve arranged at the water inlet; The gas generating device also includes a water pumping structure, which includes a water pump having a first drainage port and a second drainage port and a switch electrically connected to the water pump; the first drainage port is used to introduce external water, and the second drainage port is connected to the second one-way valve.

10. A floating device, characterized in that: The floating device comprises a gas generating device as claimed in any one of claims 1-9.

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