Gas humidifying device and gas supply system

By designing a level gauge in the gas humidification device to monitor the liquid level height and using the pipeline structure to control the liquid flow, the problem of excessive water is solved, the humidification efficiency is improved and water resources are saved.

CN222969588UActive Publication Date: 2025-06-13SHANGHAI ZHENGFAN TECH +1
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Patent Information

Application Number
CN202421972618.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-14
Publication Date
2025-06-13
Estimated Expiration
2034-08-14

AI Technical Summary

Technical Problem

In existing gas humidification devices, excessive water is prone to occur, resulting in inefficiency and waste of resources.

Method used

A gas humidification device is designed, adopting a structure connected to the first tank body and the second tank body, monitoring the liquid level height through the liquid level gauge, and controlling the flow and drainage of the liquid through the first and second pipelines to avoid excessive water.

Benefits of technology

It effectively reduces the situation of excessive water, improves humidification efficiency, saves water resources, and simplifies the pipeline structure.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a gas humidifying device and a gas supply system, and the gas humidifying device comprises a first tank body and a second tank body. An air inlet and a water inlet are formed in the first tank body; the first liquid level meter and the second liquid level meter are arranged up and down. The first tank body is connected with the second tank body through a first pipeline; the height of the first liquid level meter is H1, the height of the connecting position of the first pipeline and the first tank body is H2, and H2-H1 is larger than 0 and smaller than or equal to 3 cm. According to the technical scheme, due to the fact that the connecting position of the first pipeline and the first tank body is not higher than the first liquid level meter by 3 cm, even if the first liquid level meter arranged on the upper portion breaks down, the liquid level height in the first tank body can be maintained at the connecting position of the first pipeline and the first tank body, and the effect of limiting the liquid level height of the first tank body is achieved.
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Description

Technical Field

[0001] This application relates to the technical field of gas humidification, and more particularly, to a gas humidification device and a gas supply system. Background Art

[0002] In existing gas humidification devices, gas is passed into a container containing water to increase the humidity of the gas. During the operation of the gas humidification device, it is necessary to detect the amount of water and add water to the container in a timely manner. In order to save water, a sensor is also installed on the container to avoid excessive water in the container. Summary of the Utility Model

[0003] The purpose of this application is to provide a gas humidification device and a gas supply system to reduce the occurrence of excessive water in the container.

[0004] The embodiments of this application are implemented as follows:

[0005] In a first aspect, an embodiment of this application provides a gas humidification device, including a first tank body and a second tank body. An air inlet and a water inlet are provided on the first tank body; and a first liquid level gauge and a second liquid level gauge are arranged vertically. The first tank body is connected to the second tank body through a first pipeline; the height of the first liquid level gauge is H1, the height of the connection position of the first pipeline and the first tank body is H2, and 0 < H2 - H1 ≤ 3 cm.

[0006] In the above technical solution, by setting the first liquid level gauge and the second liquid level gauge, the liquid level height in the first tank body can be monitored to facilitate the control of the liquid level height. The gas entering the first tank body from the air inlet contacts the water entering the first tank body from the water inlet and then the humidity increases, and then enters the second tank body through the first pipeline. Since the connection position of the first pipeline and the first tank body is not higher than 3 cm of the first liquid level gauge, even if the first liquid level gauge located above fails, the liquid level height in the first tank body will be maintained at the connection position of the first pipeline and the first tank body, playing a role in restricting the liquid level height of the first tank body.

[0007] In combination with the first aspect, in some alternative embodiments, a second pipeline is further included. The first end of the second pipeline is connected to the lower side of the pipe wall of the first pipeline, and the second end extends downward.

[0008] In the above technical solution, the liquid entering the first pipeline will enter the second pipeline to reduce the liquid entering the second tank body.

[0009] In combination with the first aspect, in some alternative embodiments, a first drain pipe is connected to the lower end of the first tank body, a second drain pipe is connected to the lower end of the second tank body, and both the first drain pipe and the second drain pipe are communicated with the second pipeline.

[0010] In the above technical solution, the first drain pipe, the second drain pipe and the second pipe all play a role in draining water and are connected and communicated with each other, which can simplify the pipeline structure.

[0011] Combined with the first aspect, in some alternative embodiments, the first drain pipe is provided with a first drain valve, and the first drain valve is arranged above the connection position of the second pipe and the first drain pipe.

[0012] In the above technical solution, the connection position of the second pipe and the first drain pipe is located at the lower end of the first drain valve, so as to avoid the liquid in the second pipe from flowing back into the first tank.

[0013] Combined with the first aspect, in some alternative embodiments, the second drain pipe is provided with a third liquid level gauge, the second pipe is provided with a second drain valve, and the third liquid level gauge is in signal connection with the second drain valve; the second drain valve is arranged below the connection position of the second pipe and the second drain pipe.

[0014] In the above technical solution, the condensed liquid in the second tank will be discharged from the second drain pipe connected to the second tank. By arranging a third liquid level gauge in the second drain pipe and connecting the third liquid level gauge with the second drain valve in signal, it can be realized that when the liquid level height in the second drain pipe reaches the position where the third liquid level gauge is located, the second drain valve opens to discharge the liquid in the second drain pipe.

[0015] Combined with the first aspect, in some alternative embodiments, a control unit is further included, and the first liquid level gauge, the second liquid level gauge, the third liquid level gauge, the first drain valve and the second drain valve are all in signal connection with the control unit; the control unit is configured to: when the first liquid level gauge sends a signal of detecting liquid, control the first drain valve to drain water; when the third liquid level gauge sends a signal of detecting liquid, control the second drain valve to drain water.

[0016] Combined with the first aspect, in some alternative embodiments, an air inlet pipe is arranged in the first tank, the air inlet pipe penetrates into the first tank from the air inlet, and the air outlet of the air inlet pipe is located at the bottom of the first tank.

[0017] In the above technical solution, since the air outlet of the air inlet pipe is arranged at the bottom of the first tank, the gas can pass through a longer path in the liquid, and thus make more sufficient contact with the liquid in the first tank, improving the humidifying effect.

[0018] In combination with the first aspect, in some alternative embodiments, a fixing member is connected to the inner wall of the first tank body; the air inlet pipe includes a vertical section extending vertically and a joint connected to the lower end of the vertical section; the vertical section is connected to the fixing member, and the joint has at least two of the air outlet ports.

[0019] In the above technical solution, the air inlet pipe is fixed to the inner wall of the first tank body through the fixing member, which can reduce the shaking and floating of the air inlet pipe in the first tank body. Since the joint has at least two air outlet ports, the gas can be discharged from more positions of the air inlet pipe, increasing the number of bubbles, that is, the amount of gas in contact with the liquid can be increased, improving the humidifying effect.

[0020] In combination with the first aspect, in some alternative embodiments, the second tank body is provided with an air supply port, and the second tank body is further provided with a hygrometer, and the detection end of the hygrometer is located inside the second tank body.

[0021] In the above technical solution, the second tank body can supply the humidified gas through the air supply port, and the hygrometer can be used to detect the gas humidity inside the second tank body to detect the humidifying effect.

[0022] In a second aspect, an embodiment of the present application provides a gas supply system, including a water source, a gas source, and the gas humidifying device provided in the first aspect; the water source is communicated with the water inlet of the first tank body, and the gas source is communicated with the gas inlet of the first tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the gas humidifying device provided by the embodiment of the present application;

[0025] Figure 2 It is a cross-sectional schematic diagram of the gas humidifying device provided by the embodiment of the present application (the air inlet pipe is not shown);

[0026] Figure 3 It is an installation schematic diagram of the air inlet pipe provided by the embodiment of the present application.

[0027] Icons: 100 - Gas humidifying device; 110 - First tank; 111 - Fixing part; 120 - Second tank; 131 - First liquid level gauge; 132 - Second liquid level gauge; 133 - Third liquid level gauge; 141 - First pipeline; 142 - Second pipeline; 151 - First drain pipe; 152 - Second drain pipe; 161 - First drain valve; 162 - Second drain valve; 170 - Air inlet pipe; 171 - Vertical section; 172 - Joint; 173 - Porous pipe; 181 - Water inlet pipe; 190 - Gas supply pipe; 1100 - Hygrometer. Detailed implementation manners

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Usually, the components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application that is claimed, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the products of this application are usually placed when in use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0032] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0033] In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "arrange", "install", "connect", and "link" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0034] The present application provides a gas supply system for providing gas with a certain humidity, including a water source, a gas source, and a gas humidifying device 100. The gas provided by the gas source can be nitrogen or other gases that need to be humidified. The water source and the gas source are both introduced into the gas humidifying device 100 and mixed in the gas humidifying device 100 to achieve the purpose of humidifying the gas provided by the gas source.

[0035] As Figure 1 And Figure 2 As shown, the gas humidifying device 100 includes a first tank 110 and a second tank 120. The first tank 110 is provided with an air inlet and a water inlet. It is not difficult to understand that both the air inlet and the water inlet are through holes penetrating the wall of the first tank 110. The water source is connected to the water inlet of the first tank 110, and the gas source is connected to the air inlet of the first tank 110. Among them, the connection between the water source and the water inlet of the first tank 110 means that there is a water inlet pipe 181 connected between the water source and the water inlet of the first tank 110, so that the water in the water source can reach the inside of the first tank 110 through the water inlet. The water source can directly fall into the first tank 110 at the position of the water inlet, or enter the first tank 110 from the middle position or the bottom position of the first tank 110 under the guidance of the water inlet pipe 181; the connection between the gas source and the air inlet of the first tank 110 means that there is an air inlet pipe 170 connected between the gas source and the air inlet of the first tank 110, so that the water in the water source can reach the inside of the first tank 110 through the air inlet. The gas source can directly enter the first tank 110 at the position of the air inlet, or enter the first tank 110 from the middle position or the bottom position of the first tank 110 under the guidance of the air inlet pipe 170. As Figure 2 As shown, among them, the water outlet end of the water inlet pipe 181 is located in the middle of the first tank 110 in the vertical direction, and the water outlet end of the air inlet is located at the bottom of the first tank 110.

[0036] In Figure 1 And Figure 2 In the embodiment shown, both the water inlet and the air inlet of the first tank 110 are arranged at the top of the first tank 110. In some other embodiments, they can also be arranged at the position near the top on the side of the first tank 110. Figure 1The first tank body 110 shown is a cylindrical shell. In some other embodiments, it may also be a shell of other shapes.

[0037] A first pipeline 141 is connected between the second tank body 120 and the first tank body 110. The gas humidified in the first tank body 110 enters the second tank body 120 through the first pipeline 141. The gas in the second tank body 120 has a certain humidity and contains a certain amount of moisture. Therefore, in the second tank body 120, some impurities in the gas can settle to improve the purity of the gas source. The second tank body 120 is provided with a gas supply port. It is not difficult to understand that the gas supply port is a through hole provided in the second tank body 120 to enable the gas in the second tank body 120 to be discharged. As Figure 1 In Figure 2 the shown embodiment, three gas supply ports are provided on the second tank body 120, and each gas supply port is provided with a gas supply pipe 190 to supply gas with a certain humidity to the gas-using unit; the gas supply port can be provided at the top of the second tank body 120, or at a position near the top on the side of the second tank body 120, or at other positions in the second tank body 120. Further, the second tank body 120 is also provided with a hygrometer 1100, and the detection end of the hygrometer 1100 is located inside the second tank body 120 to detect the humidity of the gas in the second tank body 120.

[0038] In some embodiments, the first tank body 110 is also provided with a first liquid level gauge 131 and a second liquid level gauge 132 arranged vertically, that is, the first liquid level gauge 131 is located above the second liquid level gauge 132. The first liquid level gauge 131 and the second liquid level gauge 132 are used to assist in controlling the liquid level in the first tank body 110. For example, when the first liquid level gauge 131 detects the liquid (water) in the first tank body 110, the liquid in the first tank body 110 is discharged to control the liquid level height; when the second liquid level gauge 132 does not detect the liquid, water in the water source is sent into the first tank body 110 through the water inlet pipe 181. Those skilled in the art can set the positions of the first liquid level gauge 131 and the second liquid level gauge 132 according to actual needs.

[0039] It is not difficult to understand that the height of the first liquid level gauge 131 is lower than the connection position of the first pipeline 141 and the first tank 110. Further, in some embodiments, let the height of the first liquid level gauge 131 be H1, and the height of the connection position of the first pipeline 141 and the first tank 110 be H2, where 0 < H1 - H2 ≤ 3 cm, and the value of H1 - H2 can be 1 cm, 2 cm, 3 cm, etc. In this embodiment, if the first liquid level gauge 131 fails, when the liquid level in the first tank 110 exceeds the first liquid level gauge 131, the excess liquid will be discharged from the first pipeline 141, thus avoiding the situation of too high liquid level in the first tank 110. Among them, the above H1 and H2 can be the heights measured with reference to the bottom of the first tank 110, or the heights obtained with reference to other positions, as long as H1 and H2 are obtained with reference to the same reference. The above H1 is the data measured at the position where the detection end of the first liquid level gauge 131 is located, and H2 can be the data measured at the center of the mouth of the end where the first pipeline 141 is connected to the first tank 110, or the data measured at the bottom or top of the mouth of the end where the first pipeline 141 is connected to the first tank 110. Those skilled in the art can make reasonable selections as long as it can be realized that when the first liquid level gauge 131 fails and cannot detect the liquid level height, the water is discharged from the first tank 110 through the first pipeline 141, and the liquid level height in the first tank 110 is maintained at an acceptable height.

[0040] In some embodiments, the volume of the cavity in the second tank 120 is small. If a large amount of liquid in the first tank 110 enters the second tank 120, it will reduce the space in the second tank 120 that can accommodate gas. Therefore, the first pipeline 141 is also connected to a second pipeline 142. The first end of the second pipeline 142 is connected to the lower side of the pipe wall of the first pipeline 141, and the second end of the second pipeline 142 extends downward. As Figure 1 shown in Figure 2 , when the liquid in the first tank 110 enters the first pipeline 141, it will enter the second pipeline 142 from the first end of the second pipeline 142, and then move along the lower end of the second pipeline 142 to reduce the liquid entering the second pipeline 142 from the first pipeline 141. In this embodiment, the second end of the second pipeline 142 extending downward means that the second pipeline 142 is arranged as a whole in a downward manner, so that the liquid in the first pipeline 141 can be drained from the second pipeline 142 under the action of gravity. This embodiment includes the embodiment where the second pipeline 142 is a straight pipe; it also includes Figure 2 the embodiment shown in

[0041] like Figure 1 and Figure 2 As shown, a first drain pipe 151 is connected to the lower end of the first tank body 110 for draining the liquid in the first tank body 110; a second drain pipe 152 is connected to the lower end of the second tank body 120, and both the first drain pipe 151 and the second drain pipe 152 are connected to the second pipe 142, and further, the second end of the second pipe 142 is connected to the first drain pipe 151. It is not difficult to understand that the first drain pipe 151 is used to drain the liquid in the first tank body 110 to control the liquid level in the first tank body 110 or replace the liquid in the first tank body 110; the water vapor and condensed liquid water in the second tank body 120 will gather in the second tank body 120 and flow to the bottom, and the second drain pipe 152 is used to drain the liquid in the second tank body 120. Since the first drain pipe 151, the second drain pipe 152 and the second pipe 142 all play a role in drainage and are connected, the pipeline structure can be simplified.

[0042] Furthermore, the first drain pipe 151 is provided with a first drain valve 161. When the first drain valve 161 is opened, the liquid in the first tank 110 can be discharged from the first drain pipe 151. The second drain pipe 152 is provided with a second drain valve 162. When the second drain valve 162 is opened, the liquid in the second tank 120 can be discharged from the second drain pipe 152. Figure 2 In the illustrated embodiment, the first drain valve 161 is disposed above the connection position between the second pipe 142 and the first drain pipe 151. Therefore, when the first drain valve 161 is closed, the liquid in the first tank body 110 will not be discharged after passing through the first drain pipe 151 and the second pipe 142 in sequence, and the liquid in the second pipe 142 will not flow back into the first tank body 110.

[0043] exist Figure 2 In the embodiment shown, the second pipe 142 is provided with a second drain valve 162, which is arranged below the connection position between the second pipe 142 and the second drain pipe 152. When the second drain valve 162 is closed, the liquid accumulated in the second tank body 120 will not be directly drained away, but will be accumulated in the second pipe 142 and the second drain pipe 152; and Figure 2 As shown, when the second drain valve 162 is closed, the gas in the second tank body 120 is either discharged from the gas supply pipe 190 connected to the second tank body 120, or enters the second pipe 142 from the second drain pipe 152, and then returns to the second tank body 120 through the first pipe 141, which can reduce the waste of humidified gas.

[0044] Furthermore, a third liquid level gauge 133 is also provided on the second drain pipe 152, and the third liquid level gauge 133 is signal-connected to the second drain valve 162. It is not difficult to understand that the third liquid level gauge 133 can detect the liquid level height formed by the liquid flowing from the second tank body 120 into the second drain pipe 152 in the second drain pipe 152. After the liquid level height in the second drain pipe 152 reaches a preset value, the third liquid level gauge 133 emits a signal to open the second drain valve 162 to discharge the accumulated liquid in the second pipe 142 and the second drain pipe 152.

[0045] In some embodiments, the gas humidifying device 100 further includes a control unit. The first liquid level gauge 131, the second liquid level gauge 132, the first drain valve 161 and the second drain valve 162 are all signal-connected to the control unit. That is, the first liquid level gauge 131 is signal-connected to the first drain valve 161 through the control unit. When the liquid level in the first tank body 110 is too high, the first liquid level gauge 131 sends a signal detecting the liquid to the control unit, and the control unit then opens the first drain valve 161. The second liquid level gauge 132 is signal-connected to the water source through the control unit. When the liquid level in the first tank body 110 is too low, the water source adds liquid to the first tank body 110. The third liquid level gauge 133 is signal-connected to the second drain valve 162 through the control unit. When the third liquid level gauge 133 sends a signal detecting the liquid to the control unit, the control unit then opens the second drain valve 162.

[0046] As Figure 2 And Figure 3 As shown, in some embodiments, the intake pipe 170 penetrates into the first tank body 110 from the air inlet, and the air outlet of the intake pipe 170 is located at the bottom of the first tank body 110, so that the gas can pass through a longer path in the liquid, and then make more sufficient contact with the liquid in the first tank body 110 to improve the humidifying effect. Further, the intake pipe 170 includes a vertically extending vertical end, and a fixing member 111 is connected to the inner wall of the first tank body 110. The fixing member 111 is a ring structure, and through holes are evenly distributed in the circumferential direction of the fixing member 111. The vertical section 171 of the intake pipe 170 passes through the through holes of the fixing member 111 to play a role in fixing the intake pipe 170. The water inlet pipe 181 can also be fixed by the fixing member 111.

[0047] In some embodiments, a joint 172 is further connected to the lower end of the intake pipe 170. The joint 172 has at least two air outlets. That is, the gas in the intake pipe 170 is discharged into the liquid in the first tank body 110 through at least two air outlets on the joint 172, which can make the gas discharge from more positions of the intake pipe 170, increase the number of bubbles, that is, can increase the amount of gas in contact with the liquid and improve the humidifying effect. Further, as Figure 3As shown, a perforated pipe 173 with a plurality of small holes uniformly distributed on the pipe wall can also be connected to the air outlet position of the joint 172, so that when the gas is discharged into the first tank body 110, denser and finer bubbles are generated, further improving the humidifying effect.

[0048] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A gas humidifying device, characterized in that: include, A first tank body, wherein the first tank body is provided with an air inlet and a water inlet; and a first liquid level gauge and a second liquid level gauge arranged up and down; The second tank body, the first tank body and the second tank body are connected by a first pipe; the height of the first liquid level gauge is H1, the height of the connection position between the first pipe and the first tank body is H2, 0<H2-H1≤3cm.

2. The gas humidifying device according to claim 1, characterized in that: It also includes a second pipeline, wherein a first end of the second pipeline is connected to the lower side of the pipe wall of the first pipeline, and a second end of the second pipeline extends downward.

3. The gas humidifying device according to claim 2, characterized in that: The lower end of the first tank body is connected to a first drain pipe, and the lower end of the second tank body is connected to a second drain pipe. Both the first drain pipe and the second drain pipe are connected to the second pipeline.

4. The gas humidifying device according to claim 3, characterized in that: The first drain pipe is provided with a first drain valve, and the first drain valve is arranged above the connection position between the second pipeline and the first drain pipe.

5. The gas humidifying device according to claim 4, characterized in that: The second drain pipe is provided with a third liquid level gauge, the second pipeline is provided with a second drain valve, the third liquid level gauge is signal-connected to the second drain valve; the second drain valve is arranged below the connection position between the second pipeline and the second drain pipe.

6. The gas humidifying device according to claim 5, characterized in that: It also includes a control unit, and the first liquid level gauge, the second liquid level gauge, the third liquid level gauge, the first drain valve and the second drain valve are all connected to the control unit by signal; the control unit is configured to: when the first liquid level gauge sends a signal that liquid is detected, control the first drain valve to drain water; when the third liquid level gauge sends a signal that liquid is detected, control the second drain valve to drain water.

7. The gas humidifying device according to any one of claims 1 to 5, characterized in that: An air inlet pipe is arranged in the first tank body, and the air inlet pipe penetrates into the first tank body from the air inlet, and the air outlet of the air inlet pipe is located at the bottom of the first tank body.

8. The gas humidifying device according to claim 7, characterized in that: The inner wall of the first tank body is connected with a fixing piece; the air inlet pipe comprises a vertical section extending vertically, and a joint connected to the lower end of the vertical section; the vertical section is connected to the fixing piece, and the joint has at least two air outlets.

9. The gas humidifying device according to claim 1, characterized in that: The second tank body is provided with an air supply port, and the second tank body is also provided with a hygrometer, and the detection end of the hygrometer is located in the second tank body.

10. A gas supply system, characterized in that: It comprises a water source, an air source and the gas humidifying device according to any one of claims 1 to 9; the water source is connected to the water inlet of the first tank body, and the air source is connected to the air inlet of the first tank body.