A rectangular venturi humidifying device

Abstract

The utility model discloses a rectangular venturi pipe humidifying device, include: shell subassembly, humidifying pipeline subassembly, upper water tank subassembly and lower water tank subassembly, the utility model device adopts front and rear coaxial interface and integral casing, reduces the turbulence of entry and bypass leakage, the low pressure cooperation booster pipe of venturi middle part is communicated with the isobar, makes the transmembrane pressure difference to be in easy control interval, water vapor enters the main stream along the alignment vent, and the mixing process is relatively stable, the import and export symmetry and parallel flow passage geometry are consistent, reduce the humidity difference between the channel, adapt the continuous operation demand of hydrogen or air, at the same time, the middle installation groove embeds the waterproof membrane of ventilation and is pressed by double sealing ring, is convenient for replacing and restricts the bypass simultaneously, the vent of upper water tank and lower water tank corresponds the layout of flow channel, shortens the steam path and reduces the condensation risk, the observation window cooperates with liquid level instrument and is convenient for reading, and the sealing cap of water inlet is convenient for water supplement and reset seal, makes the maintenance process more smooth, and the shutdown time is more easily controlled.

Description

Technical Field

[0001] This utility model relates to the technical field of gas humidification devices, specifically a rectangular venturi tube humidification device. Background Technology

[0002] As the application of proton exchange membrane fuel cells in vehicles and distributed energy sources expands, the gas supply system needs to maintain appropriate humidity of the reactant gas under different temperatures, altitudes, and loads. Insufficient humidity will cause membrane resistance to increase, polarization to intensify, and durability to decrease; excessive humidity will easily lead to liquid water flooding and pressure drop fluctuations, and frequent start-stop cycles and vibration environments will further amplify these problems.

[0003] Existing humidification solutions mainly consist of hollow fiber membrane humidification or bubbling and atomization structures. The former has a complex sealing and assembly path, high requirements for the coupling between the sealant and the shell, limited pressure drop and response time, and unsatisfactory reliability and maintenance costs under vibration and thermal cycling. The latter is prone to liquid carryover and dripping into the reactor-side channels, has general dew point control accuracy, and it is difficult to balance long-term stability with energy consumption and volume.

[0004] Therefore, there is an urgent need for a humidification device with a simple structure, clear sealing path, stable dew point control under low pressure drop, rapid response to dynamic operating conditions and vibration resistance, easy modular maintenance and compact integration, and suitable for hydrogen or air supply scenarios, so as to better meet the reliability and maintenance friendliness requirements of fuel cell systems.

[0005] A search revealed a Chinese patent document disclosing a fuel cell membrane humidifier [Application No.: 202280019786.4, Publication No.: CN116964794A]. This solution employs a hollow fiber membrane cartridge structure within the casing, utilizing fuel cell exhaust gas as a moisture source to humidify the intake air. While this patent achieves the purpose of humidifying the fuel cell reaction gas, this invention employs a rectangular Venturi channel closely aligned with the upper and lower water tank components for steam supply, uses a breathable and waterproof membrane for selective permeability, and forms a modular maintenance structure through mounting grooves and independent sealing rings. This structure is more suitable for compact spaces and vibration scenarios in terms of pressure drop, liquid carrying control, and ease of maintenance. Furthermore, this structure does not rely on the exhaust gas circuit, allowing for more flexible layout and integration paths. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide a rectangular venturi tube humidification device.

[0007] A rectangular venturi tube humidifier, characterized in that it comprises: a shell assembly, a humidification pipe assembly, an upper water tank assembly, and a lower water tank assembly; The humidification pipe assembly is located inside the outer shell assembly. The humidification pipe assembly consists of a set of mutually separated rectangular venturi humidification channels. The cross-sectional area of ​​the middle part of the humidification channel is smaller than the cross-sectional area of ​​its air inlet and air outlet, and the upper and lower surfaces of the middle part of the humidification channel are provided with vent holes. The upper water tank assembly is installed on the upper side of the humidification pipe assembly, and an upper breathable and waterproof membrane is provided between the upper water tank assembly and the upper surface of the humidification pipe assembly; The lower water tank assembly is installed on the lower side of the humidification pipe assembly, and a breathable and waterproof membrane is provided between the lower water tank assembly and the lower surface of the humidification pipe assembly. The upper water tank assembly and the lower water tank assembly are connected by a connecting pipe.

[0008] Preferably, the outer casing assembly includes a front interface, a rear interface, an upper casing, an upper cover, and a lower casing. The upper casing and the lower casing are fixed as a whole, the upper cover is installed on the upper casing, the front interface is located at the front end of the humidification pipe assembly, and the rear interface is located at the rear end of the humidification pipe assembly.

[0009] The above technical solution enables efficient and stable humidification of hydrogen and air. The front and rear interfaces are respectively located at the front and rear ends of the humidification pipeline assembly. Together with the upper and lower shells fixed as one unit and the top cover closed from above, they form a rigid and airtight installation cavity, reducing bypass leakage and ineffective dead space. This ensures that all gas flows through the low-pressure zone in the middle of the rectangular Venturi humidification channel, thereby improving water vapor permeability and humidification efficiency.

[0010] Specifically, the arrangement of the end interface and integrated housing ensures coaxial alignment between the interface and the flow channel, shortening the distance from the inlet to the flow channel and reducing additional pressure loss and inlet turbulence. Rigid constraints at both ends help maintain the geometric consistency and uniform flow distribution of the parallel flow channels, reducing humidification deviations in each channel. The top cover, located on top of the upper housing, facilitates opening for inspection, replacement, and water replenishment of the breathable waterproof membrane and water tank components, without compromising the overall positioning of the housing, thus improving assembly and maintenance efficiency and sealing reliability.

[0011] Preferably, the top of the upper water tank assembly is provided with a water tank side interface, and the air inlet of the humidification pipe assembly is provided with an inlet flow channel side interface, and a booster pipe is connected between the water tank side interface and the inlet flow channel side interface.

[0012] The above technical solution establishes an isobaric channel between the air chamber above the water surface of the upper water tank assembly and the inlet flow channel assembly by connecting the water tank side interface and the inlet of the humidification pipe assembly via a booster pipe. This arrangement reduces transient pressure changes caused by start-up, shutdown, and load switching, suppresses liquid surface oscillation, backflow, and reflux, stabilizes the transmembrane pressure difference, and ensures that the water vapor permeation rate is within a controllable range, thereby improving humidification efficiency and enhancing the humidity consistency of each parallel flow channel.

[0013] Specifically, the isobaric connection enables the air chamber pressure of the upper water tank component to match the inlet pressure in real time; when a low-pressure zone is formed in the middle of the venturi, the transmembrane pressure difference is maintained within the design range, water vapor passes through the upper breathable and waterproof membrane in a directional manner, and liquid water is effectively blocked due to the combined effect of pressure difference and membrane selectivity, which significantly reduces membrane condensation, droplet carrying and so-called air-permeable membrane phenomena; the connection path is short and the response is rapid.

[0014] Preferably, the bottom of the upper water tank assembly has a vent hole, and the top of the lower water tank assembly has a vent hole, the vent holes corresponding to the vent holes on the humidification pipe assembly.

[0015] By using the above technical solution, the vent holes at the bottom of the upper water tank assembly and the top of the lower water tank assembly are aligned with the vent holes in the middle area of ​​the humidification pipe assembly. After the steam crosses the membrane, it can enter the mainstream area without going through extra cavities, which significantly shortens the diffusion path, reduces mass transfer resistance, quickly establishes the target humidity field, and reduces local condensation and back-humidification caused by stagnation.

[0016] Specifically, the upper and lower breathable waterproof membranes have corresponding ventilation holes, and the Venturi low-pressure core area is behind the membrane, where water vapor is quickly entrained and evenly mixed; the upper and lower paired steam supply paths are geometrically symmetrical, which can balance the humidity distribution of each parallel flow channel and reduce the dew point difference; the ventilation holes adopt a regular array, and the hole spacing and diameter are conducive to manufacturing and facilitate rapid cleaning and repositioning after contamination.

[0017] Preferably, the humidification pipe assembly has an installation groove in the middle, and the upper and lower breathable waterproof membranes are placed in the installation groove and sealed by the upper and lower sealing rings.

[0018] Through the above technical solution, the present invention provides an installation groove in the middle of the humidification pipe assembly, in which the upper and lower breathable waterproof membranes are embedded and axially pressed by the upper and lower sealing rings respectively, forming a combined structure of limiting, pressure equalization, and zoned sealing. This structure effectively suppresses bypass leakage, ensuring that only water vapor permeates while liquid water is reliably blocked, thus stabilizing the mass transfer conditions in the Venturi core region.

[0019] Specifically, the grooved mounting restricts the displacement and warping of the membrane edge, avoiding bulging and creep caused by thermal expansion and contraction or pressure fluctuations; the independent sealing ring forms a double sealing ring at the outer edge of the membrane, blocking liquid water infiltration and gas leakage, maintaining stable transmembrane pressure difference and constant effective permeation area; the membrane and sealing components adopt modular positioning, with high re-assembly accuracy and no damage to the geometry of the main flow channel during maintenance.

[0020] Preferably, the upper water tank assembly is provided with a water inlet and a sealing cap for sealing the water inlet, an observation window is installed on the upper shell, and a level gauge is provided on the upper water tank assembly, with the position of the observation window corresponding to the level gauge.

[0021] Through the above technical solution, this invention provides an observation window corresponding to the liquid level gauge on the upper shell and a water inlet with a sealing cap on the upper water tank assembly, thus constructing a closed-loop maintenance system that enables visibility, water replenishment, and resealing. This solution supports liquid level monitoring and point-to-point water replenishment without shutting down the system, avoiding large-scale disassembly and assembly for water replenishment and reducing the risk of leakage caused by repeated pressure on the sealing surface.

[0022] Specifically, the operator can directly read the level gauge through the observation window and add water quantitatively by opening the water inlet as needed. After water addition, the sealing cap provides stable axial clamping force, which, combined with the overall rigidity of the upper and lower shells, maintains the designed pressure level of the cavity, inhibits the entry of external moisture and dust, and ensures internal cleanliness and airtightness. The position and viewing angle of the observation window are matched, providing clear readings and facilitating remote inspection.

[0023] Preferably, a piston is provided inside the upper water tank assembly, which separates the gas above the water surface inside the upper water tank assembly from the water.

[0024] Through the above technical solution, the present invention sets a piston inside the upper water tank assembly to physically isolate the gas above the water surface from the water body, so that the inlet-side pressure is evenly applied to the liquid surface through the piston, forming a stable and gentle pressure transmission path. This arrangement inhibits the bypass channel for gas to reach the membrane surface directly, reduces the risk of gas perforation and liquid carryover, stabilizes the transmembrane pressure difference, and improves the controllability and safety margin of the humidification process.

[0025] Specifically, the piston, acting as a movable isolation interface, absorbs transient pressure shocks caused by start-up, shutdown, and load changes, reducing liquid surface fluctuations and suppressing bubble formation. When the venturi center is under low pressure, the piston maintains the water surface pressure within the designed range, allowing water vapor to pass smoothly through the upper breathable and waterproof membrane without carrying away liquid water, thus preventing membrane contamination and dripping into the flow channel. The piston's guiding and sealing mechanisms ensure appropriate motion damping and controllable leakage.

[0026] Compared with the prior art, the present invention has the following advantages: 1. This utility model device adopts a front and rear coaxial interface and an integrated housing to reduce inlet turbulence and bypass leakage; the low pressure in the middle of the Venturi is connected to the pressure booster pipe for equal pressure connection, so that the transmembrane pressure difference is in an easily controllable range; water vapor enters the mainstream along the aligned vent holes, and the mixing process is relatively stable; the inlet and outlet are symmetrical and the parallel flow channel is geometrically consistent, reducing the humidity difference between channels and adapting to the continuous operation requirements of hydrogen or air.

[0027] 2. The central mounting groove of this utility model is fitted with a breathable and waterproof membrane and pressed by double sealing rings, which facilitates replacement and restricts bypass; the vent holes of the upper and lower water tanks are arranged in accordance with the flow channels, shortening the steam path and reducing the risk of condensation; the observation window and the level gauge are matched to facilitate reading, and the water inlet is equipped with a sealing cap to facilitate water replenishment and resealing, making the maintenance process smoother and the downtime easier to control. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of this utility model; Figure 3 This is a schematic cross-sectional view of the present invention. Figure 1 ; Figure 4 This is a schematic cross-sectional view of the present invention. Figure 2 .

[0029] In the diagram: 1. Front interface; 2. Humidification pipe assembly; 3. Inlet flow channel side interface; 4. Pressure booster pipe; 5. Top cover; 6. Water tank side interface; 7. Sealing cap; 8. Water inlet; 9. Upper water tank assembly; 10. Upper shell; 11. Upper breathable waterproof membrane; 12. Rear interface; 14. Lower shell; 15. Lower water tank assembly; 16. Lower breathable waterproof membrane; 26. Observation window; 27. Liquid level gauge; 28. Piston. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1 to 4 This utility model provides a technical solution: A rectangular venturi tube humidifier, characterized in that it comprises: a shell assembly, a humidification pipe assembly 2, an upper water tank assembly 9, and a lower water tank assembly 15; The humidification pipe assembly 2 is located inside the outer shell assembly. The humidification pipe assembly 2 consists of a set of mutually separated rectangular venturi humidification channels. The cross-sectional area of ​​the middle part of the humidification channel is smaller than the cross-sectional area of ​​its air inlet and air outlet, and the upper and lower surfaces of the middle part of the humidification channel are provided with vent holes. The upper water tank assembly 9 is installed on the upper side of the humidification pipe assembly 2, and an upper breathable and waterproof membrane 11 is provided between the upper water tank assembly 9 and the upper surface of the humidification pipe assembly 2. The lower water tank assembly 15 is installed on the lower side of the humidification pipe assembly 2, and a lower breathable and waterproof membrane 16 is provided between it and the lower surface of the humidification pipe assembly 2. The upper water tank assembly 9 and the lower water tank assembly 15 are connected by a connecting pipe.

[0032] Specifically, the outer casing assembly includes a front interface 1, a rear interface 12, an upper shell 10, an upper cover 5, and a lower shell 14. The upper shell 10 and the lower shell 14 are fixed as a whole, and the upper cover 5 is installed on the upper shell 10. The front interface 1 is located at the front end of the humidification pipe assembly 2, and the rear interface 12 is located at the rear end of the humidification pipe assembly 2, enabling efficient and stable humidification of hydrogen and air. The front interface 1 and the rear interface 12 are respectively located at the front and rear ends of the humidification pipe assembly 2. Together with the upper shell 10 and the lower shell 14 being fixed as a whole and the upper cover 5 being closed from above, a rigid and airtight installation cavity is formed, reducing bypass leakage and ineffective dead space, ensuring that all gas flows through the low-pressure zone in the middle of the rectangular Venturi humidification channel, thereby improving water vapor transmission rate and humidification efficiency.

[0033] Specifically, the arrangement of the "end interface + integrated housing" ensures that the interface and the flow channel are coaxially aligned, shortening the distance from the inlet to the flow channel and reducing additional pressure loss and inlet turbulence. The rigid constraints at the front and rear ends help maintain the geometric consistency and uniformity of flow distribution in the parallel flow channels, reducing humidification deviations in each channel. The upper cover 5 is located above the upper housing 10, facilitating the inspection, replacement, and water replenishment of the breathable waterproof membrane and water tank components, while not disrupting the overall positioning of the housing 1014, thus improving assembly and maintenance efficiency and sealing reliability.

[0034] In practical applications, the layout of the integrated shell and front and rear interfaces facilitates quick connection with the fuel cell gas supply pipeline, shortens the installation length, and improves vibration resistance and pressure resistance. The device can achieve the target dew point and stable humidification effect with a small pressure drop, which helps to improve the continuity and efficiency of the stack operation and reduce system energy consumption and maintenance frequency.

[0035] Specifically, the top of the upper water tank assembly 9 is provided with a water tank side interface 6, and the air inlet of the humidification pipe assembly 2 is provided with an inlet flow channel side interface 3. A booster pipe 4 connects the water tank side interface 6 and the inlet flow channel side interface 3. Through the booster pipe 4, the water tank side interface 6 and the inlet flow channel side interface 3 are connected, so that an isobaric channel is established between the air chamber above the water surface of the upper water tank assembly 9 and the inlet 211 of the humidification pipe assembly 2. This arrangement reduces the transient pressure changes caused by start-up, shutdown and load switching, suppresses liquid surface oscillation, backflow and reflux, stabilizes the transmembrane pressure difference, and ensures that the water vapor permeation rate is within a controllable range, thereby improving humidification efficiency and improving the humidity consistency of each parallel flow channel.

[0036] Specifically, the isobaric connection enables the air chamber pressure of the upper water tank assembly 9 to match the inlet 211 in real time; when a low-pressure zone is formed in the middle of the Venturi 213, the transmembrane pressure difference is maintained within the design range, water vapor passes through the upper breathable and waterproof membrane 11 in a directional manner, and liquid water is effectively blocked due to the combined effect of pressure difference and membrane selectivity, which significantly reduces membrane condensation, droplet carrying and so-called air-permeable membrane phenomenon; the connection path is short and the response is rapid.

[0037] In practical applications, this pressure balancing loop can adapt to fluctuations in operating conditions without additional power, reducing frequent adjustments of control valves and loop oscillations, and maintaining a stable outlet dew point. It is also compatible with both hydrogen and air media, facilitating rapid integration with fuel cell gas supply systems and comprehensively improving system efficiency, operational reliability, and component lifespan.

[0038] Specifically, the bottom of the upper water tank assembly 9 is provided with a vent hole, and the top of the lower water tank assembly 15 is provided with a vent hole. The vent holes correspond to the vent holes on the humidification pipe assembly 2. The vent holes at the bottom of the upper water tank assembly 9 and the top of the lower water tank assembly 15 are aligned with the vent holes in the middle 213 area of ​​the humidification pipe assembly 2. After the steam crosses the membrane, it can enter the mainstream area without going through extra cavities, which significantly shortens the diffusion path, reduces the mass transfer resistance, quickly establishes the target humidity field, and reduces local condensation and backhumidification caused by retention.

[0039] Specifically, the upper breathable waterproof membrane 11 and the lower breathable waterproof membrane 16 have corresponding ventilation holes. Behind the membrane is the Venturi low-pressure core area, where water vapor is quickly entrained and evenly mixed. The upper and lower paired steam supply paths are geometrically symmetrical, which can balance the humidity distribution of each parallel flow channel and reduce the dew point difference. The ventilation holes adopt a regular array, and the hole spacing and diameter are conducive to manufacturing and facilitate rapid cleaning and repositioning after contamination.

[0040] In practical applications, this alignment structure can achieve the predetermined dew point with a lower pressure drop, reducing energy consumption and compressor load; at the same time, it suppresses condensation and contamination caused by local enrichment on the membrane surface, extends the maintenance cycle of the membrane and water tank components, maintains long-term stable output, and improves the availability and operation and maintenance economy of the whole machine.

[0041] Specifically, the humidification pipe assembly 2 has an installation groove in its middle. The upper breathable waterproof membrane 11 and the lower breathable waterproof membrane 16 are placed in the installation groove and sealed by an upper sealing ring and a lower sealing ring. This invention provides an installation groove in the middle of the humidification pipe assembly 2, embedding the upper breathable waterproof membrane 11 and the lower breathable waterproof membrane 16 within it, and axially pressing them together by the upper and lower sealing rings, forming a combined structure of limiting, equalizing pressure, and partitioning sealing. This structure effectively suppresses bypass leakage, ensuring that only water vapor permeates while liquid water is reliably blocked, stabilizing the mass transfer conditions in the Venturi core region.

[0042] Specifically, the grooved mounting restricts the displacement and warping of the membrane edge, avoiding bulging and creep caused by thermal expansion and contraction or pressure fluctuations; the independent sealing ring forms a double sealing ring at the outer edge of the membrane, blocking liquid water infiltration and gas leakage, maintaining stable transmembrane pressure difference and constant effective permeation area; the membrane and sealing components adopt modular positioning, with high re-assembly accuracy and no damage to the geometry of the main flow channel during maintenance.

[0043] In practical applications, the membrane, mounting groove, and sealing ring form a standardized unit that can be quickly replaced, reducing downtime and spare parts inventory pressure; the outlet dew point is more predictable due to its stable boundary, and the humidification quality is consistent during long-term operation, significantly improving the reliability of the equipment and its economic efficiency throughout the entire life cycle.

[0044] Specifically, the upper water tank assembly 9 is equipped with a water inlet 8 and a sealing cap 7 for sealing the water inlet. An observation window 26 is installed on the upper housing 10, and a level gauge 27 is installed on the upper water tank assembly 9. The position of the observation window 26 corresponds to the level gauge 27. This invention establishes a closed-loop maintenance system for visibility, water replenishment, and resealing by providing an observation window 26 corresponding to the level gauge 27 on the upper housing 10 and a water inlet 8 with a sealing cap 7 on the upper water tank assembly 9. This system supports level monitoring and point-to-point water replenishment without shutting down the system, avoiding large-scale disassembly and reassembly for water replenishment and reducing the risk of leakage caused by repeated pressure on the sealing surface.

[0045] Specifically, the operator can directly read the level gauge 27 through the observation window 26 and open the water inlet 8 as needed to add water quantitatively. After water addition, the sealing cap 7 provides stable axial clamping force, which, together with the overall rigidity of the upper shell 10 and the lower shell 14, maintains the designed pressure level of the cavity, inhibits the entry of external moisture and dust, and ensures internal cleanliness and airtightness. The position and viewing angle of the observation window are matched, providing clear readings and facilitating remote inspection.

[0046] In practical applications, this design significantly shortens maintenance paths and downtime, improves operational safety and accessibility, provides ample humidification medium, and ensures long-term stability of the outlet dew point. Its compact structure makes it suitable for space-constrained and high-vibration environments such as vehicle-mounted and stationary fuel cells, thereby reducing the total lifecycle maintenance cost.

[0047] Specifically, a piston 28 is installed inside the upper water tank assembly 9. The piston 28 separates the gas above the water surface from the water in the upper water tank assembly 9. By installing the piston 28 inside the upper water tank assembly 9, the present invention achieves physical isolation between the gas above the water surface and the water, allowing the inlet-side pressure to be evenly applied to the liquid surface through the piston, forming a stable and gentle pressure transmission path. This arrangement inhibits the bypass channel for gas to reach the membrane surface directly, reduces the risk of gas perforation and liquid carryover, stabilizes the transmembrane pressure difference, and improves the controllability and safety margin of the humidification process.

[0048] Specifically, piston 28, acting as a movable isolation interface, absorbs transient pressure shocks caused by start-up, shutdown, and load changes, reducing liquid surface fluctuations and suppressing bubble formation. When the Venturi center 213 is under low pressure, the piston maintains the water surface pressure within the designed range, allowing water vapor to pass smoothly through the upper breathable and waterproof membrane 11 without carrying away liquid water, thus preventing membrane contamination and dripping into the flow channel. The piston's guiding and sealing mechanism ensures appropriate motion damping and controllable leakage.

[0049] In practical applications, this structure is more robust to dynamic and extreme conditions, reduces abnormal leakage and dew point fluctuations, and extends the service life of the membrane module and the upper water tank module. At the same time, it reduces the complexity of the control strategy, facilitates long-term stable operation of the whole machine, and meets the stringent humidity requirements of fuel cells.

[0050] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rectangular venturi tube humidification device, characterized in that, include: The outer casing assembly, the humidification pipe assembly (2), the upper water tank assembly (9), and the lower water tank assembly (15); The humidification pipe assembly (2) is located inside the outer shell assembly. The humidification pipe assembly (2) consists of a set of mutually separated rectangular Venturi humidification channels. The cross-sectional area of ​​the middle part of the humidification channel is smaller than the cross-sectional area of ​​its air inlet and air outlet. The upper and lower surfaces of the middle part of the humidification channel are provided with vent holes. The upper water tank assembly (9) is installed on the upper side of the humidification pipe assembly (2), and an upper breathable waterproof membrane (11) is provided between it and the upper surface of the humidification pipe assembly (2); The lower water tank assembly (15) is installed on the lower side of the humidification pipe assembly (2), and a lower breathable waterproof membrane (16) is provided between it and the lower surface of the humidification pipe assembly (2); The upper water tank assembly (9) and the lower water tank assembly (15) are connected by a connecting pipe.

2. The rectangular venturi tube humidifier according to claim 1, characterized in that, The outer shell assembly includes a front interface (1), a rear interface (12), an upper shell (10), an upper cover (5), and a lower shell (14). The upper shell (10) and the lower shell (14) are fixed as a whole. The upper cover (5) is installed on the upper shell (10). The front interface (1) is located at the front end of the humidification pipe assembly (2), and the rear interface (12) is located at the rear end of the humidification pipe assembly (2).

3. The rectangular venturi tube humidifier according to claim 1, characterized in that, The top of the upper water tank assembly (9) is provided with a water tank side interface (6), and the air inlet of the humidification pipe assembly (2) is provided with an inlet flow channel side interface (3). A booster pipe (4) is connected between the water tank side interface (6) and the inlet flow channel side interface (3).

4. The rectangular venturi tube humidifier according to claim 1, characterized in that, The upper water tank assembly (9) has a vent hole at the bottom and the lower water tank assembly (15) has a vent hole at the top, and the vent hole corresponds to the vent hole on the humidification pipe assembly (2).

5. The rectangular venturi tube humidifier according to claim 1, characterized in that, The humidification pipe assembly (2) is provided with an installation groove in the middle. The upper breathable waterproof membrane (11) and the lower breathable waterproof membrane (16) are provided in the installation groove and sealed by the upper sealing ring and the lower sealing ring.

6. The rectangular venturi tube humidifier according to claim 2, characterized in that, The upper water tank assembly (9) is provided with a water inlet (8) and a sealing cap (7) for sealing the water inlet. An observation window (26) is installed on the upper housing (10). A level gauge (27) is provided on the upper water tank assembly (9). The position of the observation window (26) corresponds to that of the level gauge (27).

7. The rectangular venturi tube humidifier according to claim 1, characterized in that, A piston (28) is provided inside the upper water tank assembly (9), and the piston (28) separates the gas above the water surface in the upper water tank assembly (9) from the water.

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