Humidifying device and fresh air handling unit

Abstract

The invention provides a humidifying device and a fresh air handling unit, and the humidifying device comprises a first-stage water disc, a second-stage water disc, a third-stage water disc and a fourth-stage water disc, the humidifying water disc is arranged in the first-stage water disc, and a water outlet is formed in the side wall of the humidifying water disc; the wet film unit is arranged in the humidifying water tray; the water distribution plate is arranged above the wet film unit, and a plurality of water distribution holes are formed in the water distribution plate in a penetrating manner; the second-stage water disc is arranged in the first-stage water disc, and a water inlet is formed in the side wall of the second-stage water disc and connected with the water outlet through a communicating pipe; the water pump is arranged in the second-stage water tray; the first end of the humidifying pipe is communicated with an outlet of the water pump, and the second end of the humidifying pipe extends to the water distribution plate; the water replenishing pipe extends to the water distribution plate, and a water replenishing valve is mounted on the water replenishing pipe. With the adoption of the device, the water flow subjected to humidification operation is conveyed to the water distribution plate again under the action of the water pump, flows down along the wet film unit again and circularly participates in the humidification process, so that the recycling of a water source is realized, and the waste of the water source is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air systems, and in particular to a humidifying device and a fresh air unit. Background Art

[0002] In recent years, there are more and more small air volume fresh air fans used in residential areas, and the functions of fresh air fans are also increasing. Fresh air fans are equipped with humidification devices, dehumidification devices and purification devices, etc., which have the functions of humidification, dehumidification and purification. Among them, during the humidification process, water needs to be continuously transported to the humidification device. Part of the water evaporates and is consumed during the humidification process, while most of the water is discharged after humidification and no longer plays any role, resulting in a waste of water. Summary of the invention

[0003] In view of this, the present invention provides a humidifying device and a fresh air unit to solve the above technical problems.

[0004] The humidifying device provided by the present invention comprises:

[0005] A primary water pan, wherein a drain port is provided on a side wall of the primary water pan, and the drain port is connected to a drain pipe;

[0006] A humidifying water pan, the humidifying water pan is arranged in the primary water pan, and a water discharge port is opened on the side wall;

[0007] A wet film unit, wherein the wet film unit is arranged in the humidifying water tray;

[0008] A water distribution plate, which is arranged above the wet film unit and has a plurality of water distribution holes;

[0009] A secondary water pan, the secondary water pan is arranged in the primary water pan, and a water inlet is opened on the side wall, and the water inlet is connected to the water outlet through a connecting pipe;

[0010] A water pump, the water pump is arranged in the secondary water tray;

[0011] A humidifying pipe, wherein a first end of the humidifying pipe is connected to an outlet of the water pump, and a second end of the humidifying pipe extends to the water distribution plate;

[0012] A water supply pipe extends to the water distribution plate, and a water supply valve is installed on the water supply pipe.

[0013] Optionally, the humidifying device further comprises:

[0014] A water flow switch sensor, wherein the water flow switch sensor is installed on the humidifying tube;

[0015] A controller, wherein the input end of the controller is communicatively connected to the output end of the water flow switch sensor, and the output end of the controller is communicatively connected to the control end of the water supply valve.

[0016] Optionally, a water pressure sensor and a flow limiter are installed on the water supply pipe;

[0017] The input end of the controller is communicatively connected to the output end of the water pressure sensor, and the output end of the controller is communicatively connected to the control end of the current limiter.

[0018] Optionally, a water inlet flow meter is installed on the water supply pipe;

[0019] A drainage flow meter is installed on the drainage pipe;

[0020] The output ends of the water inlet flow meter and the water discharge flow meter are respectively communicatively connected to the input end of the controller.

[0021] Optionally, a liquid level sensor is provided in the primary water tray, and an output end of the liquid level sensor is communicatively connected to an input end of the controller.

[0022] Optionally, the humidifying device further includes: a water distribution pipe, the water distribution pipe is evenly laid on the water distribution plate, the water distribution pipe is penetrated by a plurality of water outlet holes, and the humidifying pipe and the water replenishing pipe are respectively connected to the water distribution pipe.

[0023] Optionally, the wet film unit includes a plurality of humidification modules that are sequentially arranged and spliced, and each of the humidification modules includes a peripheral frame and a wet film fixed in the peripheral frame.

[0024] Optionally, the wet film units are provided in multiple groups, and the multiple groups of wet film units are arranged in sequence.

[0025] Optionally, the wet film is made of steel mesh.

[0026] The present invention also provides a fresh air unit, comprising a shell, and also comprising a humidifying device as described in any one of the above items, wherein the humidifying device is arranged in the shell.

[0027] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects:

[0028] By adopting the humidifying device and the fresh air unit of the present invention, the water flowing through the wet film unit humidifies the airflow introduced into the fresh air unit, and then falls into the humidifying water pan, and flows into the secondary water pan through the connecting pipe, and is transported to the water distribution plate again under the extraction action of the water pump, and flows down along the wet film unit again, circulating and participating in the humidification process, thereby realizing the reuse of water resources and avoiding the waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a humidifying device according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A top view of the humidifying device shown.

[0031] Reference numerals:

[0032] 1: primary water pan; 2: humidifying water pan; 3: wet film unit; 31: humidifying module; 311: outer frame; 312: wet film; 4: water distribution plate; 41: water distribution hole; 5: secondary water pan; 6: water pump; 7: humidifying pipe; 8: water supply pipe; 9: drain pipe; 10: connecting pipe; 11: water supply valve; 12: water flow switch sensor; 13: flow limiter; 14: liquid level sensor; 15: water distribution pipe. DETAILED DESCRIPTION

[0033] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only simplified descriptions for the convenience of describing the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0034] Figure 1 A schematic diagram of a humidifying device according to an embodiment of the present invention; Figure 2 for Figure 1 A top view of the humidification device is shown. Figure 1 and Figure 2 As shown, the humidifying device includes a primary water tray 1, a humidifying water tray 2, a wet film unit 3, a water distribution plate 4, a secondary water tray 5, a water pump 6, a humidifying pipe 7 and a water supply pipe 8.

[0035] A drain port is provided on the side wall of the primary water tray 1, and the drain port is connected to the drain pipe 9; the humidifying water tray 2 is arranged in the primary water tray 1, and a drain port is provided on the side wall; the wet film unit 3 is arranged in the humidifying water tray 2; the water distribution plate 4 is arranged above the wet film unit 3, and a plurality of water distribution holes 41 are provided through it; the secondary water tray 5 is arranged in the primary water tray 1, and a water inlet is provided on the side wall, and the water inlet is connected to the drain port through a connecting pipe 10; the water pump 6 is arranged in the secondary water tray 5; the first end of the humidifying pipe 7 is connected to the outlet of the water pump 6, and the second end of the humidifying pipe 7 extends to the water distribution plate 4; the water supply pipe 8 extends to the water distribution plate 4, and a water supply valve 11 is installed on the water supply pipe 8.

[0036] When in use, the humidifying device is installed in the shell of the fresh air unit. Initially, there is no water flow in the humidifying water tray 2. When the airflow introduced into the fresh air unit needs to be humidified, the water supply valve 11 is opened and the water pump 6 is turned on. The external water source is then transported to the water distribution plate 4 through the water supply pipe 8, and flows to the wet film unit 3 below through the water distribution holes 41 on the water distribution plate 4. The water flows down along the wet film unit 3, so that the airflow flowing through the wet film unit 3 has its humidity increased under the action of the water flow, and the humidified airflow is then transported to the room. The water flowing down the wet film unit 3 falls into the humidifying water tray 2. As the humidification process continues, the water level in the humidifying water tray 2 gradually rises. When the water level rises to a level higher than the drain port, the water in the humidifying water tray 2 begins to flow through the connecting pipe 10 to the secondary water tray 5. When a certain amount of water is reached in the secondary water tray 5, the water pump 6 no longer runs idle. Under the extraction action of the water pump 6, the water flows into the humidifying pipe 7 and is further re-transported to the water distribution plate 4, and flows back to the wet film unit 3 through the water distribution holes 41 on the water distribution plate 4 to participate in a new round of humidification operation, and the cycle continues. When the amount of water delivered by the water supply pipe 8 to the water distribution plate 4 is too much, which in turn causes too much water to fall into the humidification water tray 2 through the wet membrane unit 3, and the water pump 6 cannot pump it away in time, as the water level in the humidification water tray 2 continues to rise, the water flows overflow from the humidification water tray 2 and enters the primary water tray 1. When the water level in the primary water tray 1 exceeds the height of the drain port, it is discharged to the outside of the fresh air unit through the drain port.

[0037] By adopting the humidifying device of the present invention, the water flowing through the wet film unit 3 humidifies the airflow introduced into the fresh air unit, and then falls into the humidifying water tray 2, and flows into the secondary water tray 5 through the connecting pipe 10, and is transported to the water distribution plate 4 again under the extraction action of the water pump 6, and flows down along the wet film unit 3 again, circulating and participating in the humidification process, thereby realizing the reuse of water resources and avoiding the waste of water resources.

[0038] like Figure 1 and Figure 2As shown, in this embodiment, the primary water tray 1, the secondary water tray 5 and the humidifying water tray 2 are all hollow grooves with openings upward, the secondary water tray 5 and the humidifying water tray 2 are arranged near the axis of the primary water tray 1, the wet film unit 3 is arranged in the humidifying water tray 2, and its extension length is slightly less than the length of the humidifying water tray 2, the water distribution plate 4 is fixed to the upper end of the wet film unit 3, and the water distribution holes 41 are evenly distributed on the water distribution plate 4. The water pump 6 is arranged in the secondary water tray 5, and the water inlet opened in the secondary water tray 5 and the water outlet opened in the humidifying water tray 2 are arranged oppositely, and the connecting pipe 10 is connected between the two. According to the actual application situation, the shape and size of the primary water tray 1, the secondary water tray 5 and the humidifying water tray 2 can be adjusted, and the opening heights of the water outlet, the water inlet and the water outlet can be appropriately adjusted. The wet film unit 3 can be of any structural form, as long as the water flows through the water distribution plate 4 and falls and flows down along the wet film unit 3, it can humidify the wind flow passing through.

[0039] Optionally, the humidifying device further comprises a water flow switch sensor 12 and a controller (not shown). The water flow switch sensor 12 is mounted on the humidifying tube 7; the input end of the controller is communicatively connected to the output end of the water flow switch sensor 12, and the output end of the controller is communicatively connected to the control end of the water supply valve 11.

[0040] When the water pump 6 can extract water from the secondary water pan 5 and transport it to the water distribution plate 4 through the humidification pipe 7, it indicates that enough water has accumulated in the secondary water pan 5, and further indicates that enough water has accumulated in the humidification water pan 2. Within a certain period of time, water can be continuously transported to the secondary water pan 5 through the connecting pipe 10. At this time, the water supply valve 11 can be temporarily closed, and water is no longer supplied to the water distribution plate 4 through the water supply pipe 8. Water is only supplied to the secondary water pan 5 through the humidification water pan 2. At the same time, the water pump 6 extracts water from the secondary water pan 5 and transports it to the water distribution plate 4, which can meet the water demand of the wet membrane unit 3. The water flow switch sensor 12 monitors the water flow data of whether there is water flowing through in real time, and transmits the water flow data to the controller in real time. When the water level in the secondary water tray 5 is too low and the water pump 6 cannot extract water, the water flow data monitored by the water flow switch sensor 12 indicates that there is no water flowing through. At this time, the water supply valve 11 is in an open state; when the water level in the secondary water tray 5 is high enough and the water pump 6 can extract water, the water flow data monitored by the water flow switch sensor 12 indicates that there is water flowing through. At this time, the controller controls the water supply valve 11 to close. In order to prevent the water supply pipe 8 from adding too much water to the water distribution plate 4, when the water flow data monitored by the water flow switch sensor 12 indicates that there is no water flowing through, the controller can control the water supply valve 11 to open intermittently and not supply water continuously. For example, the water supply valve 11 is controlled to open for one minute, close for one minute, and then open for one minute.

[0041] In this embodiment, the controller uses a single chip microcomputer. The controller controls the control logic of opening and closing the water supply valve 11 according to the changes in water flow data monitored by the water flow switch sensor 12. This can be achieved based on existing mature algorithms, and its specific working principle will not be repeated here.

[0042] Optionally, a water pressure sensor (not shown) and a flow limiter 13 are installed on the water supply pipe 8; the input end of the controller is in communication connection with the output end of the water pressure sensor, and the output end of the controller is in communication connection with the control end of the flow limiter 13. When the water supply valve 11 is opened and the external water source is delivered to the water distribution plate 4 through the water supply pipe 8, the greater the water pressure, the greater the water flow rate that can pass through the water supply valve 11 per unit time, the greater the water flow rate that can be delivered to the water distribution plate 4, and the faster the water flow through the wet membrane unit 3. In order to prevent the water flow on the wet film unit 3 from falling into the humidification water tray 2 too quickly, prevent the water level in the humidification water tray 2 from increasing too quickly, and avoid overflow, a water pressure sensor is used to monitor the water pressure data in the water supply pipe 8 in real time, and the water pressure data is transmitted to the controller in real time. The controller pre-stores the corresponding relationship between different water pressure data and the opening of the flow limiting valve. Therefore, the controller adjusts the opening of the flow limiting valve in real time according to the monitored water pressure data and the corresponding relationship, so that the water flow flowing through the water supply pipe 8 can not only meet the humidification effect of the wet film unit 3 on the wind flow flowing through, but also prevent the water level in the humidification water tray 2 from increasing too quickly. According to the actual application situation, other valve structures that can adjust the water flow rate other than the flow limiter 13 can also be selected. The control logic of the controller adjusting the opening of the flow limiter 13 according to the water pressure data can be realized according to the existing mature algorithm, and its specific working principle will not be repeated here.

[0043] Optionally, a water inlet flow meter (not shown) is installed on the water supply pipe 8; a water discharge flow meter (not shown) is installed on the drain pipe 9; the output ends of the water inlet flow meter and the water discharge flow meter are respectively communicatively connected to the input end of the controller.

[0044] When the amount of water in the humidification water pan 2 is too much and overflows to the primary water pan 1, and the water level in the primary water pan 1 exceeds the height of the drain port, the water in the primary water pan 1 flows through the drain pipe 9 and is discharged to the outside of the fresh air unit. At this time, if the water pump 6 fails to pump water, or the water flow switch sensor 12 fails, the water flow data monitored by the water flow switch sensor 12 indicates that there is no water flow, and the water supply valve 11 is controlled to be in an open state. In order to ensure that the water in the primary water pan 1 can be drained smoothly and the humidification operation is carried out normally, the water inlet flow meter is used to monitor the water inlet data in the water supply pipe 8 in real time, and the water discharge flow meter is used to monitor the water discharge data in the drain pipe 9 in real time, and the water inlet data and the water discharge data are transmitted to the controller in real time. Under the premise that the water discharge data is greater than 0, the opening of the flow limiter 13 is controlled according to the difference between the water inlet data and the water discharge data, so that the water inlet data is less than the water discharge data.

[0045] After the humidification device has been running for a period of time, in order to prevent the humidified water from evaporating during the humidification process, the ion concentration of the water circulating in the humidification water tray 2 is too high, resulting in scaling on the surface of the wet membrane unit 3, affecting the subsequent humidification effect, and it is necessary to perform drainage operations regularly to completely drain the water in the humidification water tray 2. When performing the drainage operation, turn off the water flow switch sensor 12, the water pressure sensor, the water inlet flow meter and the drainage flow meter, turn on the water pump 6 and the water supply valve 11, and open the flow limiter 13 to the maximum extent, then the water source is continuously transported to the water distribution plate 4 through the water supply pipe 8, and then flows to the wet membrane unit 3 and falls into the humidification water tray 2. The water flow in the humidification water tray 2 is disturbed by the dual effects of the water flow falling from the wet membrane unit 3 and the extraction of the water pump 6, so that the precipitated impurities are extracted by the water pump 6 to the humidification pipe 7 along the water flow, and further transported to the water distribution plate 4, and then flow down the humidified air along the wet membrane unit 3, and then fall into the humidification water tray 2. The water replenishment valve 11 is in a continuously open state, and the flow limiter 13 is at the maximum opening, so the water level in the humidification water pan 2 continues to rise and overflows into the primary water pan 1, and is finally discharged through the drain port on the side wall of the primary water pan 1. The drainage operation cycle and drainage duration can be set according to the water quality of the project. If the water quality is good, the drainage cycle can be long and the drainage time can be short. If the water quality is poor, the drainage cycle and drainage time must be short. For example, drainage is performed every 10 hours after the humidification device is running, and the drainage duration is 5 minutes.

[0046] Optionally, a liquid level sensor 14 is provided in the primary water tray 1, and an output end of the liquid level sensor 14 is communicatively connected to an input end of the controller.

[0047] When the water level in the primary water tray 1 is too high, it indicates that the water pump 6 may be faulty, or the water flow switch sensor 12 may be faulty, causing the water flow data monitored by the water flow switch sensor 12 to indicate that there is no water flow, and then the controller controls the water supply valve 11 to be in a continuously open state, resulting in excessive water supply to the water distribution plate 4 through the water supply pipe 8, excessive water flow to the humidification water tray 2 through the wet film unit 3, and a large amount of water overflowing to the primary water tray 1. If this state continues, the water flow in the primary water tray 1 may not be discharged in time, and the water level will continue to rise. In more serious cases, it may overflow into the fresh air unit. In order to avoid this situation, the liquid level sensor 14 is used to monitor the liquid level data in the primary water tray 1 in real time, and the liquid level data is transmitted to the controller in real time. When the liquid level data monitored by the liquid level sensor 14 is greater than the set liquid level pre-stored in the controller, the controller controls the water supply valve 11 to close.

[0048] Optionally, the humidifying device further comprises a water distribution pipe 15, which is evenly laid on the water distribution plate 4, and has a plurality of water outlet holes running through the water distribution pipe 15, and the humidifying pipe 7 and the water supply pipe 8 are respectively connected to the water distribution pipe 15. In this arrangement, the water distribution pipe 15 is evenly laid on the water distribution plate 4, and the water in the water distribution pipe 15 is evenly sprinkled on the water distribution plate 4 by means of the water outlet holes, thereby ensuring the uniformity of the water flow from the water distribution plate 4 to the wet membrane unit 3.

[0049] like Figure 2 As shown, a plurality of rows of water distribution holes 41 are evenly arranged on the water distribution plate 4, and each row includes a plurality of water distribution holes 41 arranged at equal intervals. The water distribution pipe 15 corresponds to the position of the wet film unit 3 below, is laid back and forth, and extends to both ends of the water distribution plate 4. A plurality of water outlet holes are arranged at intervals on the water distribution pipe 15, and each water outlet hole evenly sprinkles water onto the water distribution plate 4, and then the water flows through the water distribution holes 41 evenly arranged on the water distribution plate 4, and evenly flows to the wet film unit 3 below, and finally evenly humidifies the airflow passing through the wet film unit 3.

[0050] Optionally, the wet film unit 3 includes a plurality of humidifying modules 31 arranged and spliced ​​in sequence, and each humidifying module 31 includes an outer frame 311 and a wet film 312 fixed in the outer frame 311. The wet film unit 3 is configured as a plurality of humidifying modules 31 spliced ​​together, and if a certain position is damaged, only the humidifying module 31 at the damaged position can be replaced without replacing the entire wet film unit 3, which is conducive to improving maintenance efficiency and saving costs.

[0051] like Figure 1 As shown, in this embodiment, the wet film unit 3 includes three rows and five columns of humidification modules 31, each humidification module 31 includes a square outer frame 311, and a wet film 312 fixed in the outer frame 311, wherein the outer frame 311 is composed of four side beams connected end to end, and the outer frames 311 of two adjacent humidification modules 31 are detachably connected. According to the size of the inner cavity of different fresh air units, the size and number of humidification modules 31 can be adjusted.

[0052] Optionally, multiple groups of wet film units 3 are provided, and the multiple groups of wet film units 3 are arranged in sequence. In this arrangement, the airflow introduced into the fresh air unit needs to pass through multiple groups of wet film units 3, that is, multiple humidifications are required, which can meet the user's demand for rapid air humidification.

[0053] Within the coverage of the water distribution plate 4, multiple groups of wet film units 3 can be arranged according to actual conditions. The multiple groups of wet film units 3 are arranged in sequence along the flow direction of the airflow in the fresh air unit. The water flow falling from the water distribution plate 4 can flow evenly to each wet film unit 3, thereby performing multiple humidification on the airflow passing through.

[0054] Optionally, the wet film 312 is made of steel mesh material. Compared with commonly used paper films or other organic wet films, the steel mesh material is not easy to mold and breed bacteria, has no peculiar smell, and is conducive to long-term use.

[0055] The present invention also provides a fresh air unit, comprising a shell, and also comprising a humidifying device as described in any of the above embodiments, wherein the humidifying device is arranged in the shell.

[0056] By adopting the fresh air unit of the present invention, the water flowing through the wet film unit 3 of the humidifying device humidifies the airflow introduced into the fresh air unit, and then the water falls into the humidifying water tray 2, and flows into the secondary water tray 5 through the connecting pipe 10, and is transported to the water distribution plate 4 again under the extraction action of the water pump 6, and flows down along the wet film unit 3 again, circulating and participating in the humidification process, thereby realizing the reuse of water resources and avoiding the waste of water resources.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A humidifying device, characterized in that: include: A primary water pan, wherein a drain port is provided on a side wall of the primary water pan, and the drain port is connected to a drain pipe; A humidifying water pan, the humidifying water pan is arranged in the primary water pan, and a water discharge port is opened on the side wall; A wet film unit, wherein the wet film unit is arranged in the humidifying water tray; A water distribution plate, which is arranged above the wet film unit and has a plurality of water distribution holes; A secondary water pan, the secondary water pan is arranged in the primary water pan, and a water inlet is opened on the side wall, and the water inlet is connected to the water outlet through a connecting pipe; A water pump, the water pump is arranged in the secondary water tray; A humidifying pipe, wherein a first end of the humidifying pipe is connected to an outlet of the water pump, and a second end of the humidifying pipe extends to the water distribution plate; A water supply pipe extends to the water distribution plate, and a water supply valve is installed on the water supply pipe.

2. The humidifying device according to claim 1, characterized in that: Also includes: A water flow switch sensor, wherein the water flow switch sensor is installed on the humidifying tube; A controller, wherein the input end of the controller is communicatively connected to the output end of the water flow switch sensor, and the output end of the controller is communicatively connected to the control end of the water supply valve.

3. The humidifying device according to claim 2, characterized in that: A water pressure sensor and a flow limiter are installed on the water supply pipe; The input end of the controller is communicatively connected to the output end of the water pressure sensor, and the output end of the controller is communicatively connected to the control end of the current limiter.

4. The humidifying device according to claim 3, characterized in that: A water inlet flow meter is installed on the water supply pipe; A drainage flow meter is installed on the drainage pipe; The output ends of the water inlet flow meter and the water discharge flow meter are respectively communicatively connected to the input end of the controller.

5. The humidifying device according to any one of claims 2 to 4, characterized in that: A liquid level sensor is arranged in the primary water tray, and an output end of the liquid level sensor is communicatively connected with an input end of the controller.

6. The humidifying device according to any one of claims 1 to 4, characterized in that: Also includes: A water distribution pipe is evenly laid on the water distribution plate, and the water distribution pipe is penetrated by a plurality of water outlet holes. The humidification pipe and the water supply pipe are respectively connected to the water distribution pipe.

7. The humidifying device according to any one of claims 1 to 4, characterized in that: The wet film unit comprises a plurality of humidification modules which are sequentially arranged and spliced, and each of the humidification modules comprises an outer frame and a wet film fixed in the outer frame.

8. The humidifying device according to claim 7, characterized in that: The wet film units are provided in multiple groups, and the multiple groups of wet film units are arranged in sequence.

9. The humidifying device according to claim 7, characterized in that: The wet film is made of steel wire mesh.

10. A fresh air unit, comprising a housing, characterized in that: It also includes the humidifying device according to any one of claims 1 to 9, wherein the humidifying device is arranged in the shell.

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