A dual-cavity isolated waterway system for an air treatment device

Abstract

The application discloses a double-cavity isolated water path system for an air treatment device, and relates to the technical field of air conditioning and purification equipment. The system comprises a water storage tank, a top tank, a water pump, a double-path shunt spraying assembly, a first humidifying element and a second humidifying element. The upper and lower humidifying elements are arranged in the upper and lower humidifying cavities which are sealed and isolated. In the double-tank scheme, the water storage tank is arranged at the lower part of the device, and the top tank is arranged at the upper part of the device. The top tank supplies water to the humidifying elements through the double-path shunt spraying assembly, and the residual water is collected in the water storage tank. The water pump sends the water in the water storage tank back to the top tank to form a closed-loop circulating water path. In the single-tank scheme, the water storage tank is arranged at the bottom of the device, and the water pump sends the water to the double-path shunt spraying assembly to form a double-path shunt water supply structure. The application realizes the improvement of humidification uniformity and the effective isolation of the upper and lower cavities, reduces the risk of water leakage and mildew, and adapts to the air treatment requirements of multiple scenes of household and commercial use.

Description

Technical Field

[0001] This invention relates to the field of air conditioning and purification equipment technology, specifically a dual-chamber isolated water circuit system for an air handling device. Background Technology

[0002] In the field of indoor air conditioning and purification, humidification is one of the core functions of air handling units, and the design of its water system directly affects humidification efficiency, equipment hygiene, and ease of user maintenance. As compact home and office environments increasingly demand multi-functional air handling units, the market is placing higher requirements on the independence of the water system, its ability to prevent cross-contamination, and its automated drainage performance.

[0003] Currently available air handling units typically use a single water circuit to connect upper and lower humidification units in series. After the airflow passes through a single humidification element, the humidity tends to reach saturation, significantly reducing subsequent humidification efficiency. Furthermore, if the upper and lower chambers are not properly sealed, moisture and water can easily cross-flow, leading to water accumulation in the lower chamber, bacterial growth, or mold growth on the filter. In addition, existing humidification water circuit systems have a limited range of water tank layouts, making them inflexible and unable to adapt to the internal space constraints of different models. When the water tank is located at the top, residual water return often requires an additional dedicated pump circuit, increasing system complexity and manufacturing costs.

[0004] To address the shortcomings of existing technologies, this invention provides a dual-chamber isolated water circuit system for air handling devices, thereby solving the problems mentioned in the background art, such as uneven humidification due to single-channel water supply, water seepage and mold growth in the upper and lower chambers, and poor water tank layout flexibility in existing humidification water circuit systems. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a dual-chamber isolated water circuit system for air handling devices, thereby solving the problems mentioned in the background art, such as uneven humidification due to single-channel water supply, water seepage and mold growth in the upper and lower chambers, and poor water tank layout flexibility in existing humidification water circuit systems.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: As a first aspect, a dual-cavity isolated water circuit system for an air handling unit includes a water storage tank, a top water tank, a water pump, a dual-path diversion spray assembly, a first humidifying element, and a second humidifying element; the first humidifying element and the second humidifying element are respectively disposed in an upper humidifying cavity and a lower humidifying cavity that are sealed and isolated from each other inside the air handling unit; the water storage tank is located at the lower part of the unit, and the top water tank is located at the upper part of the unit; the top water tank supplies water to the first humidifying element and the second humidifying element respectively through the dual-path diversion spray assembly; the inlet end of the water pump is connected to the water storage tank, and the outlet end is connected to the top water tank, for returning the water in the water storage tank to the top water tank; residual water generated by each humidifying element is collected in the water storage tank to form a closed-loop circulating water circuit.

[0007] As a second aspect, a dual-cavity isolated water circuit system for an air handling unit includes a water storage tank, a water pump, a dual-path diversion spray assembly, a first humidifying element, and a second humidifying element; the first humidifying element and the second humidifying element are respectively disposed in an upper humidifying cavity and a lower humidifying cavity that are sealed and isolated from each other inside the air handling unit; the water storage tank is located at the bottom of the air handling unit; the water inlet of the water pump is connected to the water storage tank, and the water outlet is connected to the dual-path diversion spray assembly to supply water to the first humidifying element and the second humidifying element, thus forming a dual-path diversion water supply architecture.

[0008] Preferably, it also includes a first tray, a second tray, and a residual water return pipe; the first tray and the second tray are respectively located below the first humidifying element and the second humidifying element, and are used to collect residual water; the inlet end of the residual water return pipe is connected to each tray, and the outlet end is connected to the water storage tank.

[0009] Preferably, each of the trays has a drain outlet at its bottom, and a valve core assembly that is kept normally closed by elastic bias is provided at the drain outlet; the air handling unit body has a top-opening structure at the tray mounting position, and when the tray is installed in place, the top-opening structure presses against the valve core assembly to open the drain outlet, and the opening and closing state of the drain outlet is mechanically linked with the installation state of the tray, and automatically closes when the tray is removed from the mounting position.

[0010] Preferably, the dual-path split spray assembly includes a first spray plate and a second spray plate, the first spray plate being arranged facing the top surface of the first humidifying element, and the second spray plate being arranged facing the top surface of the second humidifying element; the first spray plate and the second spray plate are respectively provided with a first water supply port and a second water supply port, and the first water supply port and the second water supply port are respectively connected to the outlet end of the water pump through pipelines.

[0011] Preferably, a physical sealing isolation structure is provided between the upper humidification chamber and the lower humidification chamber, which prevents water vapor and accumulated water from flowing between the upper humidification chamber and the lower humidification chamber.

[0012] Preferably, a water inlet is installed on the top of the air handling unit, and a water inlet is located at the center of the bottom of the water inlet. The water inlet is connected to a water storage tank through a drainage pipe, thereby diverting the water from the top to the water storage tank.

[0013] Preferably, the first humidifying element and the second humidifying element are porous water-absorbing wet film or wet curtain structures.

[0014] Preferably, the upper humidification chamber and the lower humidification chamber are respectively connected to the first air duct and the second air duct of the air handling device. The airflow through the first air duct passes through the first humidification element in the upper humidification chamber to complete humidification, and the airflow through the second air duct passes through the second humidification element in the lower humidification chamber to complete humidification.

[0015] Preferably, in the single-tank solution described in the second aspect, the water storage tank can also be optionally installed on top of the air handling unit, forming a top single-tank variant. In this case, the water storage tank supplies water to the dual-flow spray assembly by gravity, without the need for a water pump. The residual water collected in the tray is collected through the residual water return pipeline and then pumped upwards back to the top water storage tank by the water pump, completing a closed-loop cycle. The inlet of the water pump is connected to the outlet of the residual water return pipeline, and the outlet is connected to the top water storage tank, which is used to pump the residual water back to the top water storage tank.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention adopts a dual-chamber design with complete sealing and isolation between the upper and lower chambers, combined with a dual-flow independent water supply architecture, to ensure that the two airflows receive independent and uniform humidification treatment, reduce the crossflow of water vapor and water accumulation between the upper and lower chambers, and reduce the risk of mold and bacterial growth.

[0017] 2. In the dual-tank scheme described in the first aspect, the top water tank uses the high-level gravitational potential energy to supply water to the spray assembly by gravity, reducing the workload of the water pump pumping upwards. The water pump only needs to return the residual water in the bottom water storage tank to the top water tank, which helps to reduce system energy consumption. The separate layout of the upper and lower water tanks can flexibly adapt to the internal space constraints of different models. The top water tank and the bottom water storage tank each perform their own functions, and the water circulation logic is clear and reliable.

[0018] 3. In the single-tank solution described in the second aspect, the water storage tank is located at the bottom, and the water pump directly pumps water upward to the dual-flow spray assembly. The structure is compact and the pipeline is simple, making it suitable for traditional vertical models. Alternatively, the water storage tank can be located at the top, using gravity to supply water. The water pump is used for residual water return. The two sub-solutions can be flexibly switched under the same system architecture without redesigning the overall water circuit layout, thus improving the system's versatility and product design freedom.

[0019] 4. An elastic bias normally closed valve core assembly is installed at the drain outlet at the bottom of the tray. In conjunction with the top opening structure of the machine body, it realizes a purely mechanically triggered drainage mechanism that automatically opens the drain when the tray is installed and automatically seals when the tray is removed. The opening and closing state of the drain outlet is mechanically linked with the installation state of the tray, replacing the electric control valve, reducing manufacturing costs and failure rate, and simplifying the user's daily maintenance process.

[0020] 5. Residual water is automatically guided back to the water storage tank through the residual water return pipeline to form a closed-loop circulating water circuit, realizing the recycling of water resources and reducing the frequency of manual water replenishment; the water filling tray is located on the top of the machine body, and the water added from the top is directly guided to the water storage tank through the diversion pipeline, making water replenishment operation convenient. Attached Figure Description

[0021] Figure 1 This is a first-view axonometric sectional view of the dual-cavity isolated water circuit system of the present invention assembled in an air handling unit; Figure 2 This is a side axonometric sectional view of the dual-cavity isolated water system of the present invention assembled in an air handling unit; Figure 3 This is a front sectional view of the dual-cavity isolated water circuit system of the present invention assembled in an air handling unit; Figure 4 This is a schematic diagram of the independent integral isometric structure of the water receiving tray of the present invention; Figure 5 This is a schematic cross-sectional view of the valve core structure of the present invention.

[0022] In the diagram: 1. Water storage tank; 2. Water pump; 3. First water supply port; 4. Second water supply port; 5. First spray plate; 6. Second spray plate; 7. First tray; 8. Second tray; 9. First humidifying element; 10. Second humidifying element; 11. Drainage pipe; 12. Residual water return pipe; 13. Top-opening structure; 14. Valve core assembly; 15. Valve core body; 16. Seal; 17. Sealing mating surface; 18. Water filling tray; 23. Physical sealing and isolation structure; 24. Water inlet; 25. First air duct; 26. Second air duct. Detailed Implementation

[0023] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] Example 1: Dual Water Tank Solution Please see Figures 1-4 This embodiment provides a dual-cavity isolated water circuit system for an air handling unit, corresponding to the technical solution described in the first aspect. The system includes a water storage tank 1, a top water tank, a water pump 2, a dual-path diversion spray assembly, a first humidifying element 9, and a second humidifying element 10. The first humidifying element 9 and the second humidifying element 10 are respectively disposed in the upper humidifying cavity and the lower humidifying cavity, which are sealed and isolated from each other inside the air handling unit; the water storage tank 1 is located at the lower part of the unit, and the top water tank is located at the upper part of the unit; the top water tank supplies water to the first humidifying element 9 and the second humidifying element 10 respectively through the dual-path diversion spray assembly; the inlet end of the water pump 2 is connected to the water storage tank 1, and the outlet end is connected to the top water tank, for returning the water in the water storage tank 1 to the top water tank; the residual water generated by each humidifying element is collected in the water storage tank 1 to form a closed-loop circulating water circuit.

[0025] In this embodiment, the water storage tank 1 and the top water tank form a dual-tank layout with separate upper and lower sections: the top water tank serves as the water supply tank, utilizing its high potential energy to supply water to the downward dual-path diversion spray assembly by gravity, without the need for a water pump in the water supply process; the water storage tank 1 serves as the water collection tank located at the bottom of the device, collecting residual water generated by each humidifying element, while the water pump 2 is only responsible for pumping the residual water collected in the water storage tank 1 back to the top water tank, completing a closed-loop water circulation. Through this division of labor mode of top gravity water supply plus bottom pumped return water, the water pump 2 only undertakes the return water function, and its workload and operating time are significantly lower than those of the full-process pumping scheme, which helps to reduce system energy consumption.

[0026] The working principle of the above scheme is as follows: First, according to the air volume and humidification requirements of the air handling unit, select a water pump 2 with appropriate power and determine the specifications of the humidification element. Install the water storage tank 1 at the corresponding position at the bottom of the device and install the top water tank at the corresponding position at the top of the device. Connect the water inlet of the water pump 2 to the water storage tank 1 and the water outlet to the top water tank through the pipeline. Connect the water outlet of the top water tank to the dual-flow spray assembly. Then, arrange the dual-flow spray assembly above the first humidification element 9 and the second humidification element 10. During operation, water in the top water tank is sprayed onto the top surfaces of the first humidifying element 9 and the second humidifying element 10 by gravity through the dual-path diversion spray assembly. The water flows from top to bottom through the humidifying elements, and the airflow that flows through the humidifying elements comes into contact with the wet surface, carrying water vapor to complete humidification. The residual water that has not evaporated naturally seeps down into the water collection structure below and is collected in the bottom water storage tank 1. The water pump 2 starts to pump the water in the water storage tank 1 back to the top water tank, completing one humidification water supply and return cycle.

[0027] The beneficial effects of the above scheme are as follows: 1. The upper and lower water tanks are designed separately. The upper water tank uses gravity to supply water, and the water pump only undertakes the function of returning water, which helps to reduce the system's energy consumption. 2. The dual-chamber sealed isolation combined with dual-path water supply allows the two humidification systems to operate completely independently, reducing mold growth and cross-contamination caused by water and steam leakage, and improving humidification uniformity. 3. The closed-loop circulating water system enables the recycling of water resources and reduces the frequency of manual water replenishment; 4. The separate design of the upper and lower water tanks can flexibly adapt to the internal space constraints of different models. The top water tank and the bottom water storage tank each perform their own functions, and the water circulation logic is clear and reliable.

[0028] Example 2: Single Water Tank Solution See Figures 1-3 This embodiment provides a dual-cavity isolated water circuit system for an air handling unit, corresponding to the technical solution described in the second aspect. The system includes a water storage tank 1, a water pump 2, a dual-path split spray assembly, a first humidifying element 9, and a second humidifying element 10. The first humidifying element 9 and the second humidifying element 10 are respectively disposed in the upper humidifying cavity and the lower humidifying cavity, which are sealed and isolated from each other inside the air handling unit; the water storage tank 1 is located at the bottom of the air handling unit; the water inlet of the water pump 2 is connected to the water storage tank 1, and the water outlet is connected to the dual-path split spray assembly to supply water to the first humidifying element 9 and the second humidifying element 10, thus forming a dual-path split water supply architecture.

[0029] The main difference between this embodiment and Embodiment 1 is the use of a single water tank layout: only one water storage tank 1 is set at the bottom of the device, and the water pump 2 draws water from the water storage tank 1 and pumps it directly upwards to the dual-path diversion spray assembly, which then diverts the water to the first humidification element 9 and the second humidification element 10. This scheme has a more compact structure and simpler piping connections, making it particularly suitable for the internal space layout of traditional vertical air handling units.

[0030] The working principle of the above scheme is as follows: the water storage tank 1 is installed at the corresponding position at the bottom of the device. The water inlet of the water pump 2 is connected to the water storage tank 1 through a pipeline, and the water outlet is connected to the dual-flow spray assembly through a pipeline. During operation, the water pump 2 draws water from the water storage tank 1 and delivers it to the dual-flow spray assembly through the pipeline. The dual-flow spray assembly divides the water into two streams, which spray the water onto the top surfaces of the first humidifying element 9 and the second humidifying element 10, respectively. The water flow penetrates through the humidifying elements from top to bottom. The airflow through the humidifying elements contacts the wet surface and carries water vapor to complete humidification. The residual water that has not evaporated naturally seeps down and flows back to the water storage tank 1, completing the humidification water supply and return circulation.

[0031] The beneficial effects of the above scheme are as follows: 1. The single-tank layout has a compact structure, simple pipe connections, low manufacturing cost, and is compatible with traditional vertical models; 2. The dual-chamber sealed isolation combined with dual-path independent water supply allows the two humidification systems to operate completely independently, reducing mold growth and cross-contamination caused by water and steam leakage; 3. The water pump directly delivers water, ensuring stable water pressure and good spray uniformity.

[0032] Example 3: Further optimization based on Examples 1-2 Based on Example 1 or Example 2, please refer to Figures 4-5 This embodiment further elaborates on the tray water collection and return structure, valve core drainage mechanism, specific structure of spray tray, sealing and isolation structure, water filling tray, humidification element and air duct connection scheme.

[0033] Furthermore, the system also includes a first tray 7, a second tray 8, and a residual water return pipe 12. The first tray 7 and the second tray 8 are respectively located below the first humidifying element 9 and the second humidifying element 10, and are used to collect residual water that seeps down from the corresponding humidifying elements. The inlet end of the residual water return pipe 12 is connected to each tray, and the outlet end is connected to the water storage tank 1, guiding the residual water collected in the trays back to the water storage tank 1. In the dual-tank scheme of Embodiment 1, the residual water return pipe 12 guides the residual water back to the bottom water storage tank 1, and then the water pump 2 pumps it back to the top water tank; in the single-tank scheme of Embodiment 2, the residual water return pipe 12 directly guides the residual water back to the water storage tank 1, completing the water circulation.

[0034] Furthermore, each tray has a drain outlet at its bottom, and a valve core assembly 14, which is kept normally closed by elastic bias, is installed at the drain outlet. A top-opening structure 13 is provided on the air handling unit body at the corresponding tray mounting position. When the tray is installed in place, the top-opening structure 13 presses against the valve core assembly 14 to open the drain outlet, and the opening and closing state of the drain outlet is mechanically linked to the installation state of the tray, automatically closing when the tray is removed from the mounting position. Through the cooperation of the elastic bias normally closed valve core and the top-opening structure of the body, in the independent state where the tray is not installed, the elastic bias automatically keeps the valve core assembly 14 in the closed position, achieving a reliable normally closed seal of the drain outlet, eliminating the risk of water leakage during transportation or non-operation. During the process of pushing the tray into the mounting position, the top-opening structure 13, fixed to the inner wall of the body, naturally presses against the valve core assembly 14, overcoming the elastic force to open it and connect the drainage passage. The entire process requires no electrical control signals or manual intervention; the switching of the drainage state can be completed by purely mechanical action.

[0035] Specifically, the valve core assembly 14 includes a valve core body 15, a seal 16, and a sealing mating surface 17. The seal 16 is installed on the sealing end face of the valve core body 15, and the sealing mating surface 17 is formed on the inner wall or end face of the drain port of the tray. Under the action of elastic force, the valve core body 15 moves in the closing direction and drives the seal 16 to press against the sealing mating surface 17 to seal the drain port. The top-opening structure 13 is a top rod or boss fixedly installed on the inner wall of the air handling unit body at the corresponding installation position. When the tray is installed to the designated installation position, the top rod or boss presses against the valve core body 15 to move against the elastic force, and the seal 16 disengages from the sealing mating surface 17, opening the drain port; when the tray is disengaged from the installation position, the top rod or boss no longer presses against the valve core body 15, and the valve core body 15 resets under the action of elastic force, driving the seal 16 to fit against the sealing mating surface 17, closing the drain port. The valve core assembly has a simple structure, consisting of only three core parts: the valve core body, the seal, and the sealing mating surface. It has low manufacturing cost, is easy to assemble, and can be easily configured in batches on the upper and lower trays.

[0036] Furthermore, the dual-path split spray assembly specifically includes a first spray plate 5 and a second spray plate 6. The first spray plate 5 and the second spray plate 6 are installed on the inner wall of the air handling unit, with the first spray plate 5 positioned directly opposite the top surface of the first humidifying element 9, and the second spray plate 6 positioned directly opposite the top surface of the second humidifying element 10. The first spray plate 5 and the second spray plate 6 are respectively provided with a first water supply port 3 and a second water supply port 4, which are respectively connected to the outlet of the water pump 2 via pipelines. In the dual-tank scheme of Embodiment 1, the first water supply port 3 and the second water supply port 4 are connected to the outlet of the top water tank via pipelines, and the water in the top water tank is sprayed onto the humidifying element via the spray plate by gravity. In the single-tank scheme of Embodiment 2, the first water supply port 3 and the second water supply port 4 are connected to the outlet of the water pump 2 via pipelines, and the water pumped by the water pump 2 is sprayed onto the humidifying element via the spray plate. Each spray plate is directly opposite the top surface of the corresponding humidifying element, ensuring that the spray water penetrates evenly from top to bottom through the entire cross-section of the humidifying element, making full use of the effective area of ​​the humidifying element, and avoiding the problems of oversaturation in some areas and uneven drying in other areas caused by centralized water supply at a single point.

[0037] Furthermore, both the first spray plate 5 and the second spray plate 6 can adopt conventional tubular spray heads or nozzle structures in the art. The number, diameter, and arrangement of their spray holes can be conventionally adapted and selected according to the cross-sectional dimensions of the corresponding humidifying element and the spray coverage requirements, and are not specifically limited here. The core function of the spray plate in this invention is to uniformly spray water onto the top surface of the humidifying element to achieve top-down permeation water supply. Any conventional spray component that can achieve this function can be used in this invention, and its specific structural form does not constitute a limitation on this invention.

[0038] Furthermore, a physical sealing isolation structure 23 is provided between the upper and lower humidification chambers. This structure prevents the crossflow of water vapor and accumulated water between the two chambers. The physical sealing isolation structure 23 can be a partition with an elastic sealing ring, installed between the upper and lower humidification chambers to form a reliable water vapor barrier. Even under conditions where both chambers operate at high humidity simultaneously or water overflows from one side, it can effectively isolate water vapor from both sides, reducing mutual penetration.

[0039] Furthermore, a water filling tray 18 is installed on the top of the air handling unit. A water inlet 24 is located at the center of the bottom of the water filling tray 18. The water inlet 24 is connected to a water storage tank 1 via a drainage pipe 11, thereby diverting water from the top to the water storage tank 1. Users can directly fill the water filling tray 18 from the top of the unit. The water automatically flows into the water storage tank 1 through the water inlet 24 and the drainage pipe 11, allowing for water replenishment without removing the tank, making operation convenient. In the dual-tank scheme of Embodiment 1, the drainage pipe 11 diverts water to the bottom water storage tank 1; in the single-tank scheme of Embodiment 2, the drainage pipe 11 diverts water to the water storage tank 1.

[0040] Furthermore, the first humidifying element 9 and the second humidifying element 10 are porous water-absorbing wet membranes or wet curtains. Porous water-absorbing wet membranes or wet curtains have a high specific surface area internal pore network. When sprayed water penetrates from top to bottom, it can fully wet the entire cross-section. When the airflow passes through the pore structure of the wet membrane, it fully contacts the wetted surface to complete moisture exchange. This results in high humidification efficiency and low airflow resistance, making it suitable for the use of large-volume air handling units.

[0041] Furthermore, the upper and lower humidification chambers are respectively connected to the first air duct 25 and the second air duct 26 of the air handling unit. The airflow through the first air duct 25 passes through the first humidification element 9 in the upper humidification chamber to complete humidification, while the airflow through the second air duct 26 passes through the second humidification element 10 in the lower humidification chamber to complete humidification. This one-to-one connection between the chambers and air ducts allows the airflow from the two independent air ducts to enter their respective humidification chambers, achieving independent humidification in different zones. The airflow paths are clear and defined, avoiding uneven humidification caused by cross-flow.

[0042] Furthermore, based on the single-tank scheme of Embodiment 2, the water storage tank 1 can also be optionally installed at the top of the air handling unit. In this case, the water storage tank 1 supplies water to the dual-flow spray assembly by gravity, and the residual humidified water is pumped back to the water storage tank 1 by the water pump 2. In this variant scheme, the water storage tank 1 is located at the top of the device, and uses the high-level gravitational potential energy to supply water to the spray plate below by gravity, without the need for a water pump to participate in the water supply process; the residual water collected by the tray is collected through the residual water return pipe 12 and then pumped upwards by the water pump 2 back to the top water storage tank 1, completing a closed-loop cycle. In this variant scheme, the inlet end of the water pump 2 is connected to the outlet end of the residual water return pipe 12, and the outlet end of the water pump 2 is connected to the top water storage tank 1, which is used to pump the residual water collected by the tray back to the top water storage tank 1; the outlet interface of the top water storage tank 1 is connected to the water supply port of the first spray plate 5 and the second spray plate 6 through a pipe, and supplies water to the spray plate by gravity. The difference between this solution and the dual-tank solution in Example 1 is that only one water storage tank 1 is set up (located at the top), and no separate water tank is set up at the bottom. The residual water is directly pumped back to the water storage tank 1 through the water pump 2. The structure is more streamlined and suitable for models with installation space at the top.

[0043] The working principle of the above scheme is as follows: Based on Schemes 1-2, this embodiment expands the tray water collection and return system, valve core drainage system, spray tray structure, sealing and isolation system, water filling tray, humidification element, and air duct connection scheme. Depending on the target model, a dual-tank scheme (Scheme 1) or a single-tank scheme (Scheme 2) is selected, and the water tank, water pump, spray tray, and pipeline are connected and assembled. The first tray 7 and the second tray 8 are pushed into their corresponding upper and lower mounting positions along the machine body guide rails. When pushed into place, the top opening structure 13 triggers the valve core assembly 14 to open the drain outlet. At this time, the drain outlet is connected to the water storage tank 1 through the residual water return pipeline 12. After the system is started, the water supply side supplies water to the spray tray according to the corresponding scheme (gravity flow or pump delivery). The spray water permeates through the humidifying element from top to bottom. The airflow flowing through the humidifying chamber comes into contact with the wet surface of the humidifying element to complete the humidification process. The residual water seeps down into the tray and enters the residual water return pipe 12 through the opened drain outlet, eventually flowing into the water storage tank 1 (in the dual-tank scheme, it is then pumped back to the top water tank by the pump 2), forming a closed-loop operation of continuous humidification water supply and return. Throughout the process, the physical sealing isolation structure 23 ensures effective isolation of water vapor and accumulated water between the upper and lower humidifying chambers, and the airflow from the two air ducts passes through the corresponding humidifying element to complete independent humidification.

[0044] The beneficial effects of the above scheme are as follows: 1. The bottom of the tray is equipped with a flexible bias normally closed valve core that works in conjunction with the top opening structure of the machine body to achieve automatic drainage triggered by pure mechanical means. The opening and closing of the drain outlet is mechanically linked to the installation status of the tray, eliminating the need for an electrically controlled valve. This results in low manufacturing costs, a low failure rate, and the tray is ready to use when inserted and stops when removed, making maintenance and operation extremely simple. 2. The valve core assembly has a simple structure, consisting of only three core parts: the valve core body, the seal, and the sealing mating surface. It has low manufacturing cost and is easy to assemble. 3. Independent spray trays are positioned directly opposite the top surface of the humidification element to ensure that the spray water evenly covers the entire cross-section of the humidification element and improves the uniformity of humidification. 4. The physical sealing and isolation structure provides a reliable water vapor barrier for the upper and lower humidification chambers, effectively preventing water and vapor from mixing. 5. The humidification chamber and the air duct are connected one-to-one, and the airflow path is clear and independent. Combined with the high-efficiency moisture exchange capacity of the porous wet membrane or wet curtain structure, it can achieve two independent and efficient humidification treatments. 6. The top water filling design of the water filling tray makes water replenishment convenient and eliminates the need to remove the water tank; 7. The single water tank solution supports two installation positions: bottom or top of the water tank. It can flexibly adapt to the internal space layout of different models and has strong versatility.

[0045] Furthermore, when using the present invention as described in Examples 1-3, it is necessary to select a water pump 2 with appropriate power and a first humidifying element 9 and a second humidifying element 10 of corresponding specifications according to the air volume, humidification capacity requirements, and internal space configuration of the target air handling device, and determine whether to adopt a dual-tank scheme (Example 1) or a single-tank scheme (Example 2). In the dual-tank scheme, the water storage tank 1 is fixed to the lower part of the device, and the top water tank is fixed to the upper part of the device. The water inlet of the water pump 2 is connected to the water storage tank 1, and the water outlet is connected to the top water tank through pipelines. The water outlet of the top water tank is connected to the water supply port of the first spray plate 5 and the second spray plate 6. In the single-tank configuration, there are two assembly methods based on the tank's location: In the bottom-mounted configuration, the water storage tank 1 is fixed to the bottom of the device, and the inlet of the water pump 2 is connected to the water storage tank 1 via a pipeline, while the outlet is connected to the water supply ports of the first spray plate 5 and the second spray plate 6. In the top-mounted configuration, the water storage tank 1 is fixed to the top of the device, and the outlet of the top water storage tank 1 is connected to the water supply ports of the first spray plate 5 and the second spray plate 6 via a pipeline. The inlet of the water pump 2 is connected to the outlet of the residual water return pipeline 12, and the outlet is connected to the top water storage tank 1. The first humidifying element 9 and the second humidifying element 10 are respectively installed in the upper and lower humidifying chambers, and a physical sealing isolation structure 23 is installed between the upper and lower humidifying chambers. Push the first tray 7 and the second tray 8 into their corresponding upper and lower mounting positions along the machine body guide rails. When they are pushed into place, the top opening structure 13 triggers the valve core assembly 14 to open the drain port. At this time, the drain port is connected to the water storage tank 1 through the residual water return pipe 12, thus completing the assembly of the entire water system.

[0046] Start water pump 2 (in the dual-tank scheme, water pump 2 is used for water return; in the single-tank bottom scheme, water pump 2 is used for water supply), and water flows through the pipeline to the spray plate. The spray water permeates from top to bottom through the humidifying element, and the airflow flowing through the humidifying chamber comes into contact with the wet surface of the humidifying element to complete the humidification process. The residual water seeps down into the tray, enters the residual water return pipeline 12 through the opened drain outlet, and finally flows into the water storage tank 1 (in the dual-tank scheme, water pump 2 pumps it back to the top water tank), forming a closed-loop operation of continuous humidification water supply and return.

[0047] It should be noted that the specific type and specifications of the humidifying element can be flexibly selected according to the humidification requirements, and the number and arrangement of the spray trays can also be adapted and adjusted according to the cross-sectional dimensions of the humidifying element; the specific sealing form of the physical sealing isolation structure is not limited to elastic sealing rings and partitions, and other equivalent sealing isolation methods can be selected; the specific form of the top-opening structure can be a top rod, a boss, or other equivalent mechanical triggering structure, as long as it can trigger the valve core to open with the installation action of the tray; in the dual-tank scheme, the water supply method from the top water tank to the spray tray is not limited to pure gravity flow, and an auxiliary pressurization device can also be added at the outlet of the top water tank to adapt to different spray tray types. When stopping operation, in the dual-tank scheme and the top single-tank scheme, the gravity water supply of the top water tank can be stopped by setting a normally closed shut-off valve or a similar intercepting structure at the outlet of the top water tank. The specific form can be selected according to the actual product design, and the water pump only stops the return water operation; in the bottom single-tank scheme, turning off water pump 2 will stop the water supply. When maintenance and cleaning are required, the first tray 7 or the second tray 8 can be pulled out in the opposite direction along the guide rail. The opening structure 13 will disengage from the valve core 15, and the elastic force will automatically reset the valve core 15 to fit the sealing mating surface 17 to close the drain port. No residual water will leak after the tray is pulled out. The humidifying element can be directly removed from the cavity for cleaning or replacement. The water storage tank 1 can be replenished or cleaned outside the device, making operation convenient.

[0048] Example 4: Based on Example 3, a thin-film pressure-sensitive element is integrated on the pressure-bearing end face of the top-opening structure 13, and a miniature non-contact displacement detection device is integrated on the side wall or the end of the tray mounting rail of the top-opening structure 13; a diagnostic and differential pressure controller is added, whose analog front end is electrically connected to the pressure-sensitive element and the displacement detection device, and whose built-in non-volatile memory pre-stores the reference curve characteristic parameter group of the valve core assembly 14 in a brand-new state after calibration, and whose microprocessor has a multi-feature extraction algorithm, a temperature compensation model, a trend analysis algorithm and wear level determination logic; a maintenance reminder indicator is added and electrically connected to the output end of the diagnostic and differential pressure controller.

[0049] The pressure-sensitive element is used to detect the contact force between the pressing end face of the push-opening structure 13 and the valve core 15 in real time at a sampling frequency of not less than 200 Hz during the process of pushing the trays 7 and 8 into the installation position, and outputs a contact force analog signal. The displacement detection device is used to synchronously detect the amount of compression displacement of the valve core 15 pushed by the push-opening structure 13, and outputs a displacement analog signal. The diagnostic and differential pressure controller has a built-in dual-channel synchronous analog-to-digital converter, which synchronously acquires the contact force signal and the displacement signal with the same sampling clock, and constructs a push stroke-push force change curve with displacement as the horizontal axis and contact force as the vertical axis during the complete process of each tray pushing action.

[0050] In this embodiment, the thin-film pressure-sensitive element refers to a flexible thin-film force sensor employing piezoresistive or piezoelectric sensing principles. Its sensitive area is adapted to the area of ​​the pressing end face of the top-opening structure 13, and its thickness does not exceed 0.3 mm. It is attached and fixed to the pressing end face of the top-opening structure 13 via adhesive or mechanical clamping, so that when the top-opening structure 13 contacts the valve core body 15, the pressure-sensitive element is clamped between the two, directly sensing the normal pressure distribution on the contact interface. The range of this pressure-sensitive element covers the entire range of the peak thrust of the valve core assembly 14 from brand new to severely worn states, with a typical range of zero to fifty Newtons. Its nonlinearity is better than 2% of the full scale, and its repeatability is better than 1%. Furthermore, its sensitive material has temperature self-compensation characteristics or is equipped with a temperature sensor for subsequent software temperature compensation.

[0051] In this embodiment, the miniature non-contact displacement detection device refers to a miniature displacement sensor based on the Hall effect, magnetoresistive effect, or eddy current principle. Its fixed part is installed on the side wall of the top-opening structure 13 or at the end of the tray mounting rail. Its detection target (a miniature permanent magnet or metal target) is embedded in or attached to the corresponding side of the valve core 15. When the valve core 15 is displaced by the push of the top-opening structure 13, the displacement detection device outputs an analog voltage signal proportional to the displacement. The effective detection stroke of this displacement detection device is not less than the full stroke range of the valve core 15 from initial contact to the maximum opening position, with a typical stroke of two to eight millimeters. The resolution is not less than 0.02 millimeters, and the linearity is better than one percent of the full scale, to meet the detection requirements for sub-millimeter-level effective stroke changes in the seal 16 due to wear and thinning.

[0052] In this embodiment, the push stroke-push force variation curve refers to the discrete data sequence constructed in the embedded memory during the complete action of pushing the pallet into the installation position in a single operation. The displacement signal output by the displacement detection device and the contact force signal output by the pressure sensitive element are synchronously collected at a preset sampling frequency of not less than 200 Hz by the diagnostic and differential pressure controller. After anti-aliasing filtering and analog-to-digital conversion, the data is displayed with the displacement value on the horizontal axis and the contact force value on the vertical axis. The curve contains three characteristic sections: the initial contact section—the displacement begins to increase but the contact force is still below the preset contact threshold (e.g., 0.5 Newtons), corresponding to the stage when the top-opening structure 13 just contacts the valve core 15 but the seal 16 has not yet been significantly compressed; the loading rise section—the contact force increases monotonically with the increase of displacement, and the slope of the curve is determined by the elastic modulus and geometry of the seal 16 material. The end of this section corresponds to the seal 16 being fully compressed and the valve core 15 reaching its maximum opening position; and the pressure holding inflection point section—after the valve core 15 reaches its maximum opening position, if the user continues to push the tray in, the displacement no longer increases but the contact force may increase sharply (due to the rigid contact of the metal parts). This inflection point can be used as an auxiliary criterion for the effective stroke end point.

[0053] In this embodiment, the reference curve characteristic parameter set refers to the push stroke-push force variation curve collected by at least five tray installation actions under standard ambient temperature (e.g., 23 degrees Celsius ± 2 degrees Celsius) when the valve core assembly 14 is in a brand new state from the factory. The following multi-dimensional characteristic parameters are extracted from each collected curve, and the statistical average of multiple measurements is stored as a reference value in the non-volatile memory of the diagnostic and differential pressure controller: The first characteristic parameter is the peak push force, i.e., the maximum contact force during the loading rise segment, reflecting the elastic reaction force when the seal 16 is fully compressed, and is directly related to the elastic modulus and cross-sectional thickness of the seal material; the second characteristic parameter is the effective stroke, i.e., the stroke length from the displacement point where the contact force first exceeds the preset contact threshold (e.g., 0.5 Newtons) to the displacement point corresponding to the peak push force, reflecting the compression distance required for the seal 16 to go from the initial contact state to the fully compressed state, and is related to... The initial thickness of the seal is directly related; the third characteristic parameter is the average slope of the loading segment, which is the ratio of the change in contact force to the change in displacement during the loading rise segment (the increase in contact force divided by the increase in displacement), reflecting the equivalent compressive stiffness of the seal 16, and is related to the elastic modulus, cross-sectional shape, and hardness of the seal material; the fourth characteristic parameter is the linearity of the loading segment, which is the correlation coefficient between the contact force-displacement data points and the best-fit straight line during the loading rise segment, reflecting the linearity of the compression process of the seal 16. New seals usually exhibit high linearity with a correlation coefficient greater than 0.95, while the linearity decreases after aging due to the enhanced nonlinear creep characteristics of the material; the fifth characteristic parameter is the initial contact displacement, which is the displacement value corresponding to the first time the contact force exceeds the preset contact threshold, reflecting the initial static position of the valve core 15 under the action of elastic force. This parameter is sensitive to the permanent compressive deformation (i.e., the permanent compression deformation rate) of the seal 16.

[0054] In this embodiment, the temperature compensation model refers to a mathematical model used by the diagnostic and differential pressure controller to correct the characteristic parameter group of the reference curve based on the current ambient temperature before performing curve comparison and wear determination. The elastic modulus of the material of the seal 16 (usually silicone rubber, EPDM rubber, or nitrile rubber) decreases with increasing temperature and increases with decreasing temperature, which is reflected in the change of the peak thrust and the slope of the loading segment with temperature. The temperature compensation model collects reference curves at multiple temperature points (such as 5 degrees Celsius, 23 degrees Celsius, and 40 degrees Celsius) during the factory calibration stage and establishes a table of temperature correction coefficients or a temperature correction fitting formula for each characteristic parameter. In actual use, based on the temperature value collected by the current temperature sensor (which can be integrated into the diagnostic and differential pressure controller or set independently near the top opening structure), the reference characteristic parameters are corrected to the equivalent reference value at the current temperature before comparison, avoiding misjudgment caused by seasonal temperature differences or equipment operating temperature rise.

[0055] In this embodiment, the wear level determination logic refers to the multi-parameter comprehensive determination process automatically executed by the diagnostic and differential pressure controller each time the pallet is pushed into the installation position. Specifically, it includes the following steps: Step 1 is curve validity verification—checking whether the push stroke-push force change curve collected this time meets the preset validity conditions, including whether the displacement span of the loading rise segment is greater than the preset minimum stroke (excluding the case where the user has not pushed it into place), whether the number of data points in the loading rise segment is greater than the preset minimum number of points (excluding the case where the pushing speed is too fast and the sampling points are insufficient), and whether the peak value of the push force falls within the preset reasonable range (excluding the case where the sensor is faulty or a foreign object is stuck). In case of lag (abnormal situation), if the curve fails the validity check, the data for that time is discarded, the wear judgment result is not updated, and the user is prompted to re-perform the standard pallet installation action through the maintenance reminder indicator device; Step 2 is feature parameter extraction and temperature compensation - for the curve that passes the validity check, extract the current feature parameters (current top thrust peak, current effective stroke, current average slope of the loading segment, current linearity of the loading segment, current initial contact displacement) corresponding to the feature parameter group of the reference curve, and call the temperature compensation model to perform temperature correction on the reference feature parameters according to the current temperature value to obtain the temperature-corrected reference feature parameter group; Step 3 is single Parameter deviation calculation—Calculate the deviation percentage for each characteristic parameter, i.e., the difference between the subtracted correction reference value and the subtracted correction reference value, divided by the correction reference value and multiplied by 100%. The deviation percentage of the peak thrust reflects the attenuation of the seal's elastic reaction force; the deviation percentage of the effective stroke reflects the reduction in seal thickness; the deviation percentage of the loading section slope reflects the change in the seal's compressive stiffness; the deviation percentage of linearity reflects the degree of nonlinear creep of the seal material; and the deviation percentage of the initial contact displacement reflects the degree of permanent compressive deformation of the seal. Each deviation percentage characterizes the aging or wear state of the seal 16 from different dimensions. Step four is multi... Parameter comprehensive score - The deviation percentages of each characteristic parameter are weighted according to preset weight coefficients to form a comprehensive wear score. The allocation of weight coefficients is determined based on the sensitivity of each characteristic parameter to seal wear and detection stability. The peak thrust and effective stroke each account for 25% to 30% (both are most sensitive to seal thickness reduction and elastic decay and have high detection stability), the loading section slope accounts for 15% to 20%, the linearity accounts for 10% to 15%, and the initial contact displacement accounts for 10% to 15%. The weighting calculation method is to multiply the absolute value of each deviation percentage by the corresponding weight and then sum them.Step five is the wear level determination—the overall wear score is compared with preset multi-level thresholds. If the overall wear score is below the first threshold (e.g., 10%), it is considered normal. If the overall wear score is between the first and second thresholds (e.g., 25%), it is considered light wear and the user is advised to observe it. If the overall wear score is between the second and third thresholds (e.g., 40%), it is considered moderate wear and the user is advised to arrange maintenance or replacement as soon as possible. If the overall wear score is above the third threshold, it is considered severe wear and the user is advised to immediately replace the seal 16 of the valve core assembly 14 or replace the entire valve core assembly 14. Furthermore, the system operating parameters can be automatically adjusted (e.g., reducing the water pump operating frequency) before the user confirms the replacement. To reduce circulating water volume and lower leakage risk); Step six is ​​trend analysis and lifespan prediction—the diagnostic and differential pressure controller stores the wear comprehensive score and timestamp of each effective detection in non-volatile memory to form a wear trend data sequence. When the accumulated number of effective detections reaches the preset minimum sample size (e.g., ten times), linear regression or exponential fitting is performed on the wear trend data sequence to calculate the wear rate (i.e., the increase in the wear comprehensive score per unit time or unit of use). Based on the difference between the current wear comprehensive score and the third threshold, as well as the wear rate, the remaining effective use count or remaining effective days of the seal 16 is estimated, and the estimated maintenance time window is output to the user through the maintenance reminder indicator device.

[0056] In this embodiment, the maintenance reminder indicator device refers to at least one of the following: LED multi-color indicator light, LCD display screen, buzzer, or wireless communication module. The LED multi-color indicator light shows a solid green light for normal operation, a flashing yellow light for light wear, a flashing orange light for moderate wear, and a flashing red light for heavy wear. The LCD display screen can show the specific wear level, the estimated remaining lifespan in days, and maintenance operation instructions. The wireless communication module (such as a Bluetooth Low Energy module or a Wi-Fi module) can push the wear status and estimated maintenance time to the user's mobile terminal application.

[0057] The working principle of the above scheme is as follows: In order to provide early warning before the valve core assembly 14's seal 16 wears but before obvious leakage occurs, the routine action of pushing the tray into the installation position, which the user inevitably performs, is used as a detection window. During the process of the top-opening structure 13 pressing against the valve core 15, a thin-film pressure-sensitive element and a miniature non-contact displacement detection device integrated in the top-opening structure 13 are used to synchronously collect contact force signals and displacement signals at a sampling frequency of not less than 200 Hz, constructing a top-pushing stroke-top-pushing force change curve for the current installation action; firstly, the effectiveness of the curve is verified to eliminate abnormalities such as incomplete or excessive pushing. The data is processed; then, five characteristic parameters are extracted from the verified curves: peak thrust, effective stroke, average slope of the loading section, linearity of the loading section, and initial contact displacement. The temperature compensation model is then used to correct the baseline characteristic parameters to their equivalent values ​​at the current temperature, eliminating the influence of ambient temperature on the mechanical properties of the seal. Next, the deviation percentage of each characteristic parameter is calculated and weighted according to preset weights to synthesize a comprehensive wear score. The score is compared with multi-level thresholds to output a graded maintenance reminder. At the same time, by performing trend analysis and curve fitting on the wear score sequence from multiple tests, the remaining effective life of the seal is estimated and a maintenance time window is pushed to the user.

[0058] The beneficial effects of the above solution are as follows: Through a progressive diagnostic process involving multi-feature parameter extraction, temperature compensation correction, weighted comprehensive scoring, trend analysis, and lifespan prediction, the originally purely mechanical and passive tray installation action is transformed into a multi-dimensional, quantitative, and predictable electrical signal diagnostic window for the wear state of valve core seals. This fills the technical gap of lacking condition monitoring methods for such installation-linked normally closed valve cores throughout their lifespan, enabling users to proactively replace the seals before they completely fail and cause leakage, thus avoiding sudden leakage damage to equipment or the surrounding environment. Moreover, the entire diagnostic process is completely transparent to the user and does not add any additional operating steps.

[0059] It should be noted that the specific models of the thin-film pressure-sensitive elements and the signal conditioning circuit designs (such as Wheatstone bridge configuration, instrumentation amplifier selection and gain settings), the specific types of miniature non-contact displacement detection devices and the installation tooling designs, the microprocessor selection (such as ARM Cortex-M series microcontrollers) and embedded firmware architecture of the diagnostic and differential pressure controllers, the calibration experimental schemes and fitting methods of correction coefficients for each temperature point in the temperature compensation model, the specific values ​​of the weight coefficients in the wear comprehensive score (which need to be determined through accelerated aging experiments based on the batch and structural dimensions of the sealing material), the specific algorithm selection for linear regression or exponential fitting in trend analysis, and the specific values ​​of the multi-level judgment thresholds (which need to be determined based on the product reliability target and the sealing life curve) involved in this embodiment are all things that can be achieved by those skilled in the art based on the technical solutions described in this specification and their common knowledge, and are not specifically limited here. The core innovation of this embodiment does not lie in the aforementioned known devices and algorithms themselves, but in transforming the purely mechanical action of tray installation into a multi-dimensional electrical signal diagnostic window for valve core seal wear, and constructing a complete diagnostic chain from multi-feature extraction, temperature compensation, weighted scoring to trend prediction. This innovation is deeply integrated with the unique "installation linkage normally closed valve core assembly + top opening structure" mechanical architecture of claim 4 of this patent, and belongs to the cross-domain fusion innovation of mechanical structure and electrical detection.

[0060] Example 5: Based on Examples 1-3, a first miniature static pressure sensor is installed on the inner wall of the upper humidification chamber, with its static pressure sampling surface parallel to the direction of the dominant airflow in the upper humidification chamber; a second miniature static pressure sensor is installed on the inner wall of the lower humidification chamber, with its static pressure sampling surface parallel to the direction of the dominant airflow in the lower humidification chamber; a first miniature electric proportional regulating valve is connected in series in the pipeline supplying water to the first spray plate 5, and a second miniature electric proportional regulating valve is connected in series in the pipeline supplying water to the second spray plate 6; a diagnostic and differential pressure controller is added (which can share the same embedded control hardware platform as Example 4, or be set independently), whose analog input channels are electrically connected to the first and second miniature static pressure sensors respectively, and whose control output channels are electrically connected to the first and second miniature electric proportional regulating valves and the fan drive circuit of the air handling unit respectively.

[0061] The diagnostic and differential pressure controller synchronously acquires the static pressure value of the upper cavity output by the first micro static pressure sensor and the static pressure value of the lower cavity output by the second micro static pressure sensor at a preset sampling frequency of not less than 10 Hz, and calculates the static pressure difference between the two cavities in real time (i.e., the static pressure value of the upper cavity minus the static pressure value of the lower cavity). When the absolute value of the static pressure difference exceeds the preset safe differential pressure threshold, the diagnostic and differential pressure controller synchronously executes a two-dimensional closed-loop control of adjusting the spray flow rate on the water path side and adjusting the fan speed on the air path side to stabilize the static pressure difference within the preset safe range, thereby eliminating the root cause of the differential pressure driving force and assisting the physical sealing isolation structure 23 in jointly blocking the crossflow of water vapor.

[0062] In this embodiment, the first and second miniature static pressure sensors refer to MEMS-type miniature absolute pressure sensors or miniature differential pressure sensors, with a package size not exceeding 5 mm x 5 mm x 3 mm. The static pressure acquisition surface is a tiny air inlet on the top surface of the sensor package. The sensor is installed as follows: a mounting groove adapted to the sensor's shape is created on the wall of the humidification chamber. After the sensor is embedded in the groove, its static pressure acquisition surface is flush with the inner wall of the chamber, and the normal direction of the acquisition surface is perpendicular to the direction of the dominant airflow within the chamber (i.e., the acquisition surface is parallel to the airflow direction) to avoid interference from the airflow pressure component on the static pressure measurement. The gap between the sensor mounting groove and the sensor is filled with sealant to ensure the airtightness of the chamber is not compromised. The static pressure sensor's range covers the static pressure range that may occur within the chamber under all operating conditions of the air handling unit, from the lowest to the highest airflow. A typical range is ±500 Pascals relative to atmospheric pressure, with a resolution of no less than 0.5 Pascals and a response time of no more than 50 milliseconds, to meet the real-time tracking requirements for rapid changes in chamber static pressure during duct airflow adjustment.

[0063] In this embodiment, the first and second micro electric proportional regulating valves refer to micro needle valves or micro ball valves driven by stepper motors or electromagnetic proportional actuators. Their valve opening degree can be continuously and linearly adjusted from completely closed (0% opening) to completely open (100% opening) by the PWM signal or analog voltage signal output from the diagnostic and differential pressure controller. The opening degree adjustment resolution is not less than 1% (i.e., at least 100 adjustable levels). In the dual-tank scheme of Embodiment 1, the first micro electric proportional regulating valve is connected in series on the water supply pipeline between the top water tank outlet and the first spray plate 5, and the second micro electric proportional regulating valve is connected in series on the water supply pipeline between the top water tank outlet and the second spray plate 6. In the single-tank scheme of Embodiment 2, the first micro electric proportional regulating valve is connected in series on the water supply pipeline between the water pump 2 outlet and the first spray plate 5, and the second micro electric proportional regulating valve is connected in series on the water supply pipeline between the water pump 2 outlet and the second spray plate 6. Each micro electric proportional regulating valve independently controls the water supply flow of its corresponding spray plate, and the two adjustments do not interfere with each other.

[0064] In this embodiment, the static pressure difference refers to the difference between the static pressure value of the upper humidification chamber collected by the first micro static pressure sensor and the static pressure value of the lower humidification chamber collected by the second micro static pressure sensor at the same sampling time. The sign and amplitude of the static pressure difference directly reflect the pressure difference driving force between the two chambers: a positive static pressure difference indicates that the static pressure of the upper chamber is higher than that of the lower chamber, and the airflow tends to penetrate from top to bottom through the tiny gaps or weak points of the physical sealing isolation structure 23. At this time, the high-humidity gas in the upper chamber may be driven by the pressure difference to enter the lower chamber; a negative static pressure difference indicates that the static pressure of the lower chamber is higher than that of the upper chamber, and the airflow tends to penetrate from bottom to top. At this time, the high-humidity gas in the lower chamber may enter the upper chamber. The larger the absolute value of the static pressure difference, the stronger the pressure difference driving force, and the higher the flow rate under the same sealing gap conditions. According to the gap flow model in fluid mechanics, the volumetric flow rate through a sealed gap is proportional to the square root (for turbulent flow) or the first power (for laminar flow) of the pressure difference across the gap. Therefore, controlling the static pressure difference to a range close to zero can fundamentally eliminate the fluid driving force of crossflow.

[0065] In this embodiment, the safety differential pressure threshold refers to the boundary value of the preset allowable range of static pressure difference, including a safety upper limit threshold (positive value) and a safety lower limit threshold (negative value). The specific value of the safety differential pressure threshold is determined through experimental calibration during the system design phase based on the sealing level of the physical sealing isolation structure 23, the equivalent hydraulic diameter of the sealing gap, the volume of the humidification chamber, and the maximum allowable crossflow rate. Typical values ​​are a safety upper limit threshold of +5 Pascals and a safety lower limit threshold of -5 Pascals. The safety differential pressure threshold is not a fixed value, but is adaptively adjusted by the diagnostic and differential pressure controller according to the current operating conditions: when the air handling unit operates at a high airflow setting, the fluctuation amplitude of the chamber static pressure increases, and to avoid unnecessary adjustment actions triggered frequently by normal pressure fluctuations, the safety differential pressure threshold is automatically widened (e.g., ±8 Pascals); when operating at a low airflow setting, the static pressure fluctuation amplitude decreases, and the safety differential pressure threshold is automatically tightened (e.g., ±3 Pascals) to provide stricter anti-crossflow protection under low airflow conditions. The mapping relationship between operating conditions and thresholds is stored in the non-volatile memory of the diagnostic and differential pressure controller in the form of a lookup table.

[0066] In this embodiment, the safe range refers to the target range in which the static pressure difference is controlled and stabilized, including two optional strategies: zero pressure difference range and slightly positive pressure range. The zero pressure difference range means that the absolute value of the static pressure difference does not exceed one Pascal, that is, the static pressure of the two chambers is basically equal, and there is no pressure difference driving force in any direction. At this time, regardless of whether there are tiny gaps in the physical sealing and isolation structure 23, there are no hydrodynamic conditions for water vapor to flow through. The micro-positive pressure range refers to a static pressure difference between 0 Pascal and +3 Pascal, where the static pressure in the upper cavity is slightly higher than that in the lower cavity. In this range, if there is a small gap in the physical sealing isolation structure 23, the airflow direction at the gap is from top to bottom. Water vapor in the upper cavity will not flow downwards into the lower cavity, and water vapor in the lower cavity cannot flow upwards into the upper cavity against the pressure difference. The engineering advantages of the micro-positive pressure strategy compared to the zero-pressure-difference strategy are: maintaining a small positive pressure difference is easier to achieve in terms of control (avoiding frequent over-adjustment oscillations near zero pressure difference), and the positive pressure difference can actively blow down trace amounts of liquid water that may condense from the upper cavity in gaseous form, preventing condensation from accumulating on the surface of the sealing isolation structure. The diagnostic and differential pressure controller defaults to the micro-positive pressure range strategy. When an abnormal increase in humidity in the lower cavity is detected (if the system is also equipped with a humidity sensor), it switches to the zero-pressure-difference range strategy to provide the highest level of isolation protection.

[0067] In this embodiment, the dual-dimensional closed-loop control of water-side spray flow adjustment and air-side fan speed adjustment refers to the coordinated control process in which the diagnostic and differential pressure controller synchronously outputs adjustment commands to the water-side and air-side actuators based on the sign and amplitude of the static pressure difference. The control logic follows the following hierarchical strategy: The first layer is the judgment of differential pressure direction and the determination of adjustment direction—if the static pressure difference is positive and greater than the upper safety threshold (the static pressure in the upper cavity is too high), the adjustment direction is to reduce the static pressure in the upper cavity and increase the static pressure in the lower cavity; if the static pressure difference is negative and less than the lower safety threshold (the static pressure in the lower cavity is too high), the adjustment direction is to reduce the static pressure in the upper cavity and increase the static pressure in the lower cavity. The first layer prioritizes adjusting the static pressure in the lower chamber to reduce it and increase it in the upper chamber. The second layer prioritizes adjustments based on their adjustment dimensions—firstly, the airflow-side adjustment is activated because the fan speed adjustment has a fast response time (the static pressure in the chamber responds within hundreds of milliseconds after a change in fan speed) and does not directly affect humidification performance. When the airflow-side adjustment reaches the preset upper limit (e.g., the fan speed has been adjusted to 80% of the maximum allowable adjustment range for the current setting) and the static pressure difference has not yet returned to a safe range, then the waterflow-side adjustment is activated as a supplement. This priority is based on the fact that waterflow-side adjustment (changing the spray flow rate) directly affects the humidification of the humidification elements and... The humidification output is adjusted in stages; excessive adjustment can cause the humidification amount to deviate from the target value, therefore it is used as an auxiliary adjustment method. The third layer is the adjustment range calculation—the adjustment range on the air path side (the increment or decrease of the fan speed) is proportional to the extent to which the static pressure difference exceeds the threshold. The proportional coefficient is determined by system calibration and is constrained by the adjustable range of the current fan speed setting. The adjustment range on the water path side (the increment or decrease of the opening of the electric proportional control valve) is proportional to the extent to which the static pressure difference exceeds the threshold. The proportional coefficient is determined by system calibration and is constrained by the physical limit of the control valve opening (0% to 100%). The fourth layer is the adjustment execution and feedback monitoring. —The diagnostic and differential pressure controller simultaneously outputs speed adjustment commands to the fan drive circuit and opening adjustment commands to the corresponding electric proportional control valve. It continues to collect static pressure difference values ​​at a preset sampling frequency and monitor their changing trends. If the static pressure difference value moves towards the safe range within a preset response time (e.g., three seconds) but has not yet entered the safe range, the current adjustment range is maintained and monitoring continues. If the static pressure difference value does not move towards the safe range within a preset response time or even moves in the opposite direction (indicating an incorrect adjustment direction or other interference factors), the current adjustment is canceled and a reverse fine-tuning is attempted. At the same time, abnormal events are recorded for subsequent system diagnostics.The fifth layer is steady-state maintenance and slow recovery—once the static pressure difference enters the safe range, the diagnostic and differential pressure controller enters steady-state maintenance mode, continuing to monitor the static pressure difference at a lower sampling frequency (e.g., 1 Hz). If the static pressure difference remains within the safe range for the preset steady-state maintenance time (e.g., 30 seconds), the water-side regulating valve is gradually and slowly restored to its normal opening (the recovery rate is much lower than the regulation rate, such as restoring 5% opening per minute, to avoid excessive pressure difference exceeding the limit again due to too rapid recovery). The air-side fan speed is restored to the default speed corresponding to the target setting according to the humidification requirements.

[0068] In this embodiment, the decoupling control of the dual-dimensional adjustment refers to the introduction of a decoupling compensation term when calculating the adjustment amount to avoid over-adjustment or oscillation caused by the simultaneous influence of water-side and air-side adjustments on the static pressure of the same cavity. Specifically, when the air-side has already increased the fan speed of the lower cavity to improve the static pressure of the lower cavity, if the water-side needs further adjustment, it should prioritize adjusting the spray flow rate corresponding to the upper cavity (reducing the upper spray flow to reduce the static pressure drop caused by the evaporative cooling effect of the upper cavity), rather than simultaneously adjusting the spray flow rate corresponding to the lower cavity, to avoid the superimposed effect of the two adjustments on the static pressure of the lower cavity, leading to over-adjustment. The decoupling compensation term is calculated using a preset coupling coefficient matrix (describing the degree of cross-influence between each adjustment channel, determined by system calibration) and superimposed on the adjustment amount calculation of each adjustment channel.

[0069] The working principle of the above scheme is as follows: To eliminate the water vapor crossflow force between the upper and lower humidification chambers from the root of the pressure difference driving force, firstly, a first miniature static pressure sensor and a second miniature static pressure sensor, installed on the inner walls of the upper and lower humidification chambers with static pressure sampling surfaces parallel to the airflow direction, collect the static pressure values ​​of the two chambers in real time at a sampling frequency of not less than 10 Hz. The diagnostic and differential pressure controller calculates the static pressure difference (static pressure value of the upper chamber minus the static pressure value of the lower chamber). Then, the absolute value of the static pressure difference is compared with the safe differential pressure threshold that is adaptively adjusted according to the current airflow level: when the static pressure difference is within the safe threshold range, the current water supply parameters and fan speed are maintained unchanged, and the system is in steady-state monitoring mode; when the absolute value of the static pressure difference exceeds the safe threshold, the diagnostic and differential pressure controller determines the adjustment direction according to the sign of the static pressure difference, and prioritizes the airflow side adjustment—by outputting a speed adjustment command to the fan drive circuit, raising the airflow level of the corresponding airflow duct in the low-pressure side chamber. The fan speed is reduced, or the fan speed of the corresponding air duct in the high-pressure side cavity is reduced. Utilizing the rapid response characteristics (hundreds of milliseconds) of the fan speed change to the static pressure of the cavity, the static pressure difference is quickly moved towards the safe range. If the air duct side adjustment reaches the preset upper limit but the static pressure difference still does not fall back to the safe range, the water duct side adjustment is simultaneously activated—by outputting a command to reduce the opening of the micro electric proportional regulating valve on the water supply pipeline to the corresponding spray plate of the high-pressure side cavity, the spray water supply flow of the humidification element on that side is reduced, thereby reducing the water vapor evaporation and evaporative cooling effect in that side cavity, and assisting in reducing the static pressure of that side cavity. During the dual-dimensional adjustment process, decoupling compensation is used to avoid the superposition of over-adjustment of the static pressure of the same cavity by the two adjustment channels. When the static pressure difference enters the preset safe range (zero pressure difference range or slightly positive pressure range), the system enters a steady-state maintenance mode. After confirming that the static pressure difference remains stable, the water duct side regulating valve is gradually and slowly restored to the normal opening and the air duct side fan speed is restored to the target default value.

[0070] The beneficial effects of the above scheme are as follows: By employing a hierarchical coordinated control strategy of wind path priority and water path assistance, an adaptive safety threshold for operating conditions, over-adjustment suppression through decoupling compensation, and a slow recovery exit mechanism for steady state, a complete closed-loop control link of "detection → judgment → adjustment → stabilization → recovery" is constructed. This breaks through the single technical path of traditional schemes that rely solely on the physical sealing isolation structure 23 to passively block water leakage. Starting from the fundamental reason of eliminating pressure difference driving force, it forms a dual anti-water leakage architecture of "structural sealing + pressure difference compensation" together with the physical sealing isolation structure 23. The physical sealing isolation structure 23 provides a static physical barrier, and the pressure difference linkage closed-loop control provides dynamic pressure difference elimination. The two work together so that even if the physical sealing isolation structure 23 develops small gaps due to long-term use or the elasticity of the seals decays, water vapor leakage cannot occur because there is no pressure difference driving force between the two cavities or a slight positive pressure protection is maintained. This significantly improves the long-term reliability and robustness of the dual-cavity sealing isolation.

[0071] Furthermore, this embodiment can be implemented in combination with Embodiment 4. In the combined implementation, the diagnostic and differential pressure controller simultaneously undertakes the cavity differential pressure control function of this embodiment and the valve core wear diagnosis function of Embodiment 4, sharing the same embedded control hardware platform. Its firmware simultaneously embeds the differential pressure control algorithm and the wear diagnosis algorithm. The two tasks are executed in a time-sharing manner or preemptively according to priority under the scheduling of the real-time operating system—the differential pressure control task is executed periodically with higher priority (period of one hundred milliseconds) to ensure real-time response to changes in cavity differential pressure; the wear diagnosis task is executed in an event-triggered manner (triggered when the tray installation action is detected by the displacement detection device), and the single diagnosis time is short (hundreds of milliseconds), which will not block the real-time performance of the differential pressure control task. The two solutions address two different dimensions of reliability risks in a dual-chamber isolated water system. This embodiment addresses the risk of water leakage driven by pressure difference between the two chambers (a reliability guarantee on the "isolation side," with the detection window covering the entire system operation period), while embodiment 4 addresses the risk of wear and aging of the mechanical drain valve core's seals (a reliability guarantee on the "drainage side," with the detection window at the moment of tray installation). The two solutions are complementary in function, can share the same controller in hardware, and do not conflict in detection timing. Together, they constitute an electrical monitoring and intelligent control reinforcement for the entire link of the dual-chamber isolated water system from "isolation" to "drainage."

[0072] It should be noted that the specific model of the MEMS micro static pressure sensor and the cavity wall mounting sealing process, the specific type of the micro electric proportional regulating valve (stepper motor driven or electromagnetic proportional) and its driving circuit design, the specific value of the safety differential pressure threshold and the calibration method of the mapping relationship between the operating condition and the threshold, the control interface protocol for the wind-side fan speed regulation (such as PWM frequency and duty cycle range), the calibration curve between the opening degree of the water-side regulating valve and the spray flow rate, the calibration experimental scheme of the coupling coefficient matrix in decoupling control, and the selection of the steady-state recovery rate (which needs to be balanced between recovery speed and differential pressure stability) involved in this embodiment can all be implemented by those skilled in the art based on the technical solutions described in this specification and their common knowledge, and are not specifically limited here. The core innovation of this embodiment does not lie in the aforementioned known devices and algorithms themselves, but in forming a hierarchical and coordinated closed-loop linkage between the dual-chamber air pressure parameters and the water supply parameters. This eliminates the root cause of pressure difference driving force to prevent cross-contamination and forms a dual protection architecture with the physical sealing structure. This innovation is deeply integrated with the unique "dual-path independent spray + physical sealing isolation structure + dual independent air duct" mechanical architecture of claims 5, 6, and 9 of this patent, and belongs to the cross-domain integration innovation of mechanical-fluid-electric control.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A dual-chamber isolated water circuit system for an air handling unit, characterized in that, It includes a water storage tank (1), a top water tank, a water pump (2), a dual-flow spray assembly, a first humidifying element (9), and a second humidifying element (10). The first humidifying element (9) and the second humidifying element (10) are respectively located in the upper humidifying cavity and the lower humidifying cavity, which are sealed and isolated from each other inside the air handling device; the water storage tank (1) is located at the lower part of the device, and the top water tank is located at the upper part of the device; the top water tank supplies water to the first humidifying element (9) and the second humidifying element (10) respectively through the dual-path diversion spray assembly; the water pump (2) has its inlet end connected to the water storage tank (1) and its outlet end connected to the top water tank, and is used to return the water in the water storage tank (1) to the top water tank; the residual water generated by each humidifying element is collected in the water storage tank (1) to form a closed-loop circulating water path.

2. A dual-chamber isolated water circuit system for an air handling unit, characterized in that, It includes a water storage tank (1), a water pump (2), a dual-flow spray assembly, a first humidifying element (9), and a second humidifying element (10); The first humidifying element (9) and the second humidifying element (10) are respectively located in the upper humidifying cavity and the lower humidifying cavity, which are sealed and isolated from each other inside the air handling device; the water storage tank (1) is located at the bottom of the air handling device; the water inlet of the water pump (2) is connected to the water storage tank (1), and the water outlet is connected to the dual-path diversion spray assembly to supply water to the first humidifying element (9) and the second humidifying element (10), thus forming a dual-path diversion water supply structure.

3. The dual-chamber isolated water system according to claim 1 or 2, characterized in that, It also includes a first tray (7), a second tray (8) and a residual water return pipe (12); the first tray (7) and the second tray (8) are respectively located below the first humidifying element (9) and the second humidifying element (10) to receive residual water; the inlet end of the residual water return pipe (12) is connected to each tray and the outlet end is connected to the water storage tank (1).

4. The dual-cavity isolated water system according to claim 3, characterized in that, Each of the trays has a drain outlet at the bottom, and a valve core assembly (14) that is kept normally closed by elastic bias is provided at the drain outlet; the air handling unit body has a top opening structure (13) at the tray mounting position. When the tray is installed in place, the top opening structure (13) presses against the valve core assembly (14) to open the drain outlet, and the opening and closing state of the drain outlet is mechanically linked with the installation state of the tray, and automatically closes when the tray is removed from the mounting position.

5. The dual-cavity isolated water system according to claim 2, characterized in that, The dual-path split spray assembly includes a first spray plate (5) and a second spray plate (6). The first spray plate (5) is arranged facing the top surface of the first humidifying element (9), and the second spray plate (6) is arranged facing the top surface of the second humidifying element (10). The first spray plate (5) and the second spray plate (6) are respectively provided with a first water supply port (3) and a second water supply port (4). The first water supply port (3) and the second water supply port (4) are respectively connected to the outlet end of the water pump (2) through pipelines.

6. The dual-chamber isolated water system according to claim 1 or 2, characterized in that, A physical sealing isolation structure (23) is provided between the upper humidification cavity and the lower humidification cavity. The physical sealing isolation structure (23) prevents water vapor and water accumulation from flowing between the upper humidification cavity and the lower humidification cavity.

7. The dual-chamber isolated water system according to claim 1 or 2, characterized in that, The top of the air handling unit is equipped with a water inlet (18), and the bottom center of the water inlet (18) is provided with a water inlet (24). The water inlet (24) is connected to the water storage tank (1) through the drainage pipe (11) so that the water added from the top is drained to the water storage tank (1).

8. The dual-chamber isolated water system according to claim 1 or 2, characterized in that, The first humidifying element (9) and the second humidifying element (10) are porous water-absorbing wet film or wet curtain structures.

9. The dual-chamber isolated water system according to claim 1 or 2, characterized in that, The upper humidification chamber and the lower humidification chamber are respectively connected to the first air duct (25) and the second air duct (26) of the air handling device. The airflow through the first air duct (25) passes through the first humidification element (9) in the upper humidification chamber to complete humidification, and the airflow through the second air duct (26) passes through the second humidification element (10) in the lower humidification chamber to complete humidification.

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