Air conditioning system

Abstract

The application relates to an air conditioning system, comprising an air conditioning unit, the air conditioning unit comprising a surface cooler and being configured with a supply air duct, the surface cooler being arranged in the supply air duct; the surface cooler divides the supply air duct into a first air duct and a second air duct along the airflow direction; a humidifier is arranged outside the air conditioning unit, and the humidifier is configured to generate water mist; a humidifying pipeline has an inlet communicated with the humidifier, the humidifying pipeline comprises at least two humidifying branches, the at least two humidifying branches are all communicated with the inlet, and outlets corresponding to the at least two humidifying branches are respectively communicated with the first air duct and the second air duct. Through the humidifying branch communicated with the second air duct, the water mist can directly enter the air duct behind the surface cooler, condensation loss on the surface cooler is avoided, water mist utilization rate is maximized, and the humidifying efficiency is directly improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to air conditioning systems. Background Technology

[0002] Centralized air conditioning systems are widely used in places requiring precise control of the indoor environment, such as industrial plants and workshops. These systems typically house all air handling equipment, including fans, coolers, humidifiers, and filters, in a centralized air conditioning room. After treatment, the air is delivered to the target space through ductwork to maintain the required temperature and humidity.

[0003] Humidification is a crucial step in air handling, especially in winter when outdoor air humidity is low. Current technology often employs high-pressure or ultrasonic humidification devices for this type of air conditioning unit. The humidifier atomizes water into tiny water mist particles, which are then transported through humidification pipes into the air supply duct of the air conditioning unit, where they mix with the air to achieve humidification.

[0004] Currently, to facilitate control and prevent excessively high humidity in the fresh air, the outlet of the humidification duct is usually located upstream (i.e., at the front end) of the airflow of the surface cooler. In related technology, patent application CN223106199U, entitled "Air Conditioning System," discloses that a first air conditioning unit includes an air conditioning duct 10 and an ultrasonic humidification device 20. The air conditioning duct 10 includes an air inlet section 11, a humidification section 12, a surface cooler section 13, and an air supply section 15 arranged sequentially in the airflow direction. The first air conditioning unit of this utility model embodiment utilizes water mist sprayed by the ultrasonic humidification device 20 to humidify the air flowing through the humidification section 12. And in conjunction with the attached... Figure 1 It can be seen that the water mist sprayed by the humidification device in the relevant technology only humidifies the air at the front end of the surface cooler.

[0005] However, the above setup has at least the following problems: the mist sent into the air conditioning unit by the humidification pipe has a low throughput when it passes through the surface cooler, and it is easy to condense on the surface cooler, resulting in insufficient air supply and affecting humidification efficiency. Utility Model Content

[0006] Based on this, it is necessary to provide an air conditioning system to address the problem in related technologies where a humidification pipe is only installed at the front end of the surface cooler, resulting in a low throughput of the humidification pipe when the mist sent into the air conditioning unit passes through the surface cooler, which easily condenses on the surface cooler and leads to insufficient air supply affecting humidification efficiency.

[0007] This application embodiment provides an air conditioning system, the air conditioning system comprising:

[0008] An air conditioning unit, the air conditioning unit including a surface cooler and an air supply duct, the surface cooler being disposed within the air supply duct; the surface cooler dividing the air supply duct into a first duct and a second duct along the airflow direction.

[0009] A humidifier, located outside the air conditioning unit, is configured to generate water mist;

[0010] The humidification pipe has an inlet connected to the humidifier. The humidification pipe includes at least two humidification branches, each of which is connected to the inlet. The outlets corresponding to the at least two humidification branches are respectively connected to the first air duct and the second air duct.

[0011] In one embodiment, the air conditioning unit further includes:

[0012] A filter assembly is disposed in the first air duct, and the outlet of one of the at least two humidification branches is located between the filter assembly and the surface cooler;

[0013] An air supply assembly is disposed in the second air duct, and the outlet of the other of the at least two humidification branches is located between the surface cooler and the air supply assembly.

[0014] In one embodiment, the humidification pipe includes a first humidification branch and a second humidification branch;

[0015] A control valve is provided on the first humidification branch and / or the second humidification branch. The control valve is configured to independently adjust the water mist delivery volume on the corresponding humidification branch.

[0016] In one embodiment, the first humidification branch is provided with multiple first outlets within the first air duct;

[0017] And / or, the second humidification branch is provided with multiple second outlets within the second air duct.

[0018] In one embodiment, the first humidification branch is provided with a first control valve, and the second humidification branch is provided with a second control valve;

[0019] The air conditioning system further includes a controller, which is communicatively connected to the first control valve and the second control valve. The controller is configured to: control the first control valve to open and the second control valve to close; or control the second control valve to open and the first control valve to close; or control the first control valve and the second control valve to open simultaneously; or control the first control valve and the second control valve to close simultaneously.

[0020] In one embodiment, the air conditioning system further includes a humidity sensor, which is at least disposed in the first humidification branch and / or the first air duct;

[0021] When the controller controls the first control valve to be in the open state, and the humidity sensor detects that the water mist output exceeds a threshold, the surface cooler is configured to dehumidify the fluid flowing through it.

[0022] In one embodiment, the second humidification branch and / or the second air duct are also provided with the humidity sensor;

[0023] The first control valve and the second control valve are electrically adjustable valves. The electrically adjustable valves are communicatively connected to the controller. The controller is configured to send opening information to the electrically adjustable valves based on the signal sent by the humidity sensor.

[0024] In one embodiment, the humidification pipe is made of stainless steel.

[0025] In one embodiment, the humidifier is an ultrasonic humidifier, and the water mist particles generated by the ultrasonic humidifier have a particle size of 1μm-10μm.

[0026] In one embodiment, the outlet of the humidification branch that is connected to the first air duct is at least partially oriented toward the air inlet of the surface cooler.

[0027] The aforementioned air conditioning system has at least two humidification branches connected to the first and second air ducts respectively via humidification pipes. This allows the system to switch between or combine pre-humidification and post-humidification branches, adapting to complex and changing operating conditions and improving control flexibility. Furthermore, through the humidification branch connected to the second air duct, water mist can directly enter the air duct after the surface cooler, avoiding condensation losses on the surface cooler and maximizing water mist utilization, directly improving humidification efficiency. Simultaneously, it reduces the increased air resistance on the surface cooler due to water mist condensation, lowering the energy consumption of the blower motor. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the existing technology.

[0029] Figure 2 This is a schematic diagram of the structure of an air conditioning system provided according to some embodiments of this application.

[0030] Figure 3 This is a schematic diagram of the structure of an air conditioning system including a control valve according to some embodiments of this application.

[0031] Icon labels:

[0032] 100. Air conditioning unit; 110. Cooler; 101. First air duct; 102. Second air duct; 120. Filter assembly; 130. Air supply assembly;

[0033] 200. Humidifier;

[0034] 300. Humidification pipe; 310. First humidification branch; 320. Second humidification branch;

[0035] 410, First control valve; 420, Second control valve. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] As mentioned in the background section, the mist delivered by the humidification duct into the air supply duct has a low throughput when flowing through the surface cooler, and a large number of water mist particles easily condense on the low-temperature fin surface of the surface cooler. This not only reduces the effective humidification capacity, resulting in low humidification efficiency, but also increases air resistance due to condensate adhering to the surface cooler, affecting the system's air supply volume and leading to increased energy consumption. Furthermore, existing humidification ducts are mostly made of materials such as PVC (Polyvinyl Chloride), and their pipe diameters are typically small. Limited by the transport capacity of small-diameter ducts, the system cannot provide sufficient air supply to meet the humidity control requirements of large areas or demanding spaces, affecting the overall performance of the air conditioning system.

[0043] To address the aforementioned problems, the air conditioning system provided in this application embodiment has at least two humidification branches connected to the first and second air ducts respectively via humidification pipes. This allows the air conditioning system to switch or combine between pre-humidification and post-humidification branches, thereby adapting to complex and changing operating conditions and improving control flexibility. Furthermore, through the humidification branch connected to the second air duct, water mist can directly enter the air duct after the surface cooler, avoiding condensation losses on the surface cooler and maximizing water mist utilization, directly improving humidification efficiency. Simultaneously, it reduces the increased air resistance on the surface cooler due to water mist condensation, lowering the energy consumption of the blower motor.

[0044] See Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of an air conditioning system provided according to some embodiments of this application. Figure 3 This is a schematic diagram of an air conditioning system including a control valve according to some embodiments of this application. One embodiment of this application provides an air conditioning system that may include an air conditioning unit 100, a humidifier 200, and a humidification duct 300.

[0045] The air conditioning unit 100 includes a surface cooler 110 and an air supply duct. The surface cooler 110 is located inside the air supply duct. The surface cooler 110 divides the air supply duct into a first air duct 101 and a second air duct 102 along the airflow direction. A humidifier 200 is located outside the air conditioning unit 100 and is configured to generate water mist. A humidification pipe 300 has an inlet connected to the humidifier 200. The humidification pipe 300 includes at least two humidification branches, both of which are connected to the inlet. The outlets corresponding to the at least two humidification branches are respectively connected to the first air duct 101 and the second air duct 102.

[0046] It is understood that the air conditioning unit 100 in this embodiment, as the main body of air handling, has an internal air supply duct in which air flows and is processed. The air conditioning unit 100 also includes a core component, a surface cooler 110, which is fixedly installed inside the air supply duct and physically divided into two continuous parts along the airflow direction: for ease of description, these are respectively defined as the first air duct 101 (located upstream of the airflow of the surface cooler 110, i.e., the air inlet side) and the second air duct 102 (located downstream of the airflow of the surface cooler 110, i.e., the air outlet side). The surface cooler 110 achieves cooling and dehumidification of the airflow through its internal refrigerant circulation.

[0047] The surface cooler 110 typically consists of aluminum fins and copper tubes, with chilled water or a directly expanding refrigerant circulating inside. When air flows over its surface, heat is carried away. If the air temperature is below the critical temperature, the water vapor in it will condense into water, thus achieving cooling and dehumidification.

[0048] Furthermore, in this embodiment, the humidifier 200 is located as an independent module on the outside of the air conditioning unit 100. This external design not only facilitates maintenance and repair but also does not occupy the limited internal space of the air conditioning unit 100. The humidifier 200 is configured to produce micron-sized water mist. Its specific type can be, but is not limited to, an ultrasonic humidifier 200 (primarily using high-frequency vibration to atomize water) or a high-pressure micro-mist humidifier 200 (primarily using a high-pressure pump to pressurize water and spray it out from tiny nozzles to form mist droplets). Of course, multiple humidifiers 200 can also be connected in parallel to provide water mist to the humidification pipe 300. In one example, the diameter of the water mist particles is preferably controlled between 1μm and 10μm. Water droplets within this size range are neither prone to settling too quickly in the air nor too small, which would cause minerals in the water to remain suspended or remain suspended for a long time, affecting air quality.

[0049] Furthermore, the humidification pipe 300 connects the humidifier 200 to the air conditioning unit 100. It has an inlet that connects to the atomizing outlet of the humidifier 200 via a rigid pipe, such as a hose or flange, to receive the water mist generated by the humidifier 200. In this embodiment, the humidification pipe 300 includes at least two humidification branches. These branches can be connected to the inlet inside the humidification pipe 300 via a tee fitting or a specially designed multi-outlet distributor, thereby achieving water mist distribution. In one example, the humidification pipe 300 is made of stainless steel. This material not only prevents pipe corrosion but also ensures structural strength for long-term use. Alternatively, rigid polyvinyl chloride, engineering plastics, or other materials can be selected based on water quality and cost considerations; no restrictions are placed here.

[0050] More importantly, the outlets of the aforementioned at least two humidification branches extend and connect to the first air duct 101 and the second air duct 102 respectively. Specifically, one humidification branch is a pre-humidification branch, whose outlet is connected to the first air duct 101 and located before the surface cooler 110; the other humidification branch is a post-humidification branch, whose outlet is connected to the second air duct 102 and located after the surface cooler 110.

[0051] In this embodiment, the openings of each humidification branch can be designed as multiple spray bars, so that the water mist is evenly distributed across the cross-section of the air duct. In one example, the outlet of the humidification branch can be designed at an angle, that is, the outlet is set towards the air inlet of the surface cooler 110 to enhance the interaction between the water mist and the surface cooler 110.

[0052] This embodiment achieves efficient and precise humidity control by setting humidification branches at the front and rear ends of the surface cooler 110. The specific control logic can be as follows:

[0053] Operating Condition 1: Conventional humidification and over-humidification prevention.

[0054] When outdoor air is dry (e.g., in winter) and humidification is needed, but there is a risk of over-humidification due to control lag or disturbance, the system prioritizes or separately activates the pre-humidification branch. In this condition, water mist initially mixes with the air in the first air duct 101 before flowing through the surface cooler 110. If the humidity is just right, the surface cooler 110 may not operate or may only operate to a small extent; if the sensor detects that the humidity is about to exceed the standard or has already exceeded it, the controller can immediately instruct the surface cooler 110 to start dehumidification mode. The over-humidified air flowing through the surface cooler 110 will be cooled and condensed, thus precisely controlling the supply air humidity within the target range.

[0055] Operating Condition 2: Rapid and Efficient Humidification.

[0056] When a rapid increase in humidity is required, and the environment is dry with a very low risk of over-humidity, the system prioritizes or independently activates the post-humidification branch. Under this condition, the water mist is directly injected into the second air duct 102, completely bypassing the surface cooler 110. This means the water mist avoids potential condensation losses that might occur when flowing through the surface cooler 110, and is almost entirely used for humidifying the air, resulting in the highest humidification efficiency and fastest response time. Simultaneously, by bypassing the surface cooler 110, condensation of the water mist on the surface cooler 110 is avoided, preventing increased air resistance and ensuring stable airflow while reducing fan energy consumption.

[0057] Operating Condition 3: High-load humidification condition.

[0058] In cases of extreme dryness or a sharp increase in humidity demand, the system can simultaneously activate both the pre- and post-humidification branches. This mode provides maximum humidification capacity, enabling a rapid increase in humidity. The system controller dynamically adjusts the valve openings of the two branches based on real-time humidity feedback to achieve optimal humidification efficiency and energy consumption control.

[0059] In summary, the air conditioning system provided in this application embodiment has at least two humidification branches connected to the first air duct 101 and the second air duct 102 respectively via the humidification pipe 300. This allows the air conditioning system to switch or combine between the pre-humidification branches and the post-humidification branches, thereby adapting to complex and changing operating conditions and improving control flexibility. Furthermore, through the humidification branch connected to the second air duct 102, water mist can directly enter the air duct after the surface cooler 110, avoiding condensation losses on the surface cooler 110, maximizing water mist utilization, and directly improving humidification efficiency. Simultaneously, it reduces the increased wind resistance of the surface cooler 110 due to water mist condensation, lowering the energy consumption of the blower motor.

[0060] In this embodiment, a humidification branch connected to the first air duct 101, along with the dehumidification function of the surface cooler 110, provides reliable over-humidification protection for the entire humidification system. This helps prevent damage to the production process or indoor environment caused by excessive humidification, improving the operational reliability of the entire air conditioning system. Furthermore, the humidifier 200's location outside the air conditioning unit 100 allows for independent and modular humidification modules. When the humidifier 200 needs maintenance, cleaning, or replacement, there is no need for large-scale disassembly of the main structure of the air conditioning unit 100, greatly facilitating maintenance and reducing maintenance costs and time.

[0061] Below, we will combine the appendix Figure 2 -Appendix Figure 3 The specific structure of the air conditioning system provided in the embodiments of this application will be described in detail.

[0062] like Figure 2 As shown, in some embodiments, the air conditioning unit 100 further includes a filter assembly 120 and an air supply assembly 130. The filter assembly 120 is disposed in the first air duct 101, and the outlet of one of at least two humidification branches is located between the filter assembly 120 and the surface cooler 110; the air supply assembly 130 is disposed in the second air duct 102, and the outlet of the other of at least two humidification branches is located between the surface cooler 110 and the air supply assembly 130.

[0063] It is understood that the filter assembly 120 in this embodiment is typically a pre-filter or medium-efficiency filter, capable of pre-purifying the air entering the air conditioning unit 100 and removing particulate matter such as dust. The outlet of the pre-humidification branch is located downstream of the filter assembly 120 and upstream of the surface cooler 110. This arrangement ensures that the air used for humidification is filtered clean air, preventing dust from mixing with water mist and contaminating the surface cooler 110.

[0064] The air supply assembly 130 (mainly referring to the air supply fan) is installed within the second air duct 102 to blow the treated air to the target area. The outlet of the post-humidification branch is located downstream of the surface cooler 110 and upstream of the air supply assembly 130. This arrangement allows the water mist from the post-humidification to be fully agitated and carried away by the airflow generated by the air supply fan, achieving uniform mixing. It also avoids potential corrosion or dynamic balance problems caused by water mist directly spraying onto the fan impeller. This arrangement improves the mixing degree of water mist and air, which is beneficial for improving the uniformity and efficiency of humidification.

[0065] like Figure 2 and Figure 3As shown, in some embodiments, the humidification pipe 300 includes a first humidification branch 310 and a second humidification branch 320; a control valve is provided on the first humidification branch 310 and / or the second humidification branch 320, and the control valve is configured to independently adjust the water mist delivery volume on the corresponding humidification branch.

[0066] Specifically, at least two humidification branches are defined as the first humidification branch 310, also known as the aforementioned pre-humidification branch, and the second humidification branch 320, also known as the aforementioned post-humidification branch. Control valves are installed on the first humidification branch 310 and / or the second humidification branch 320. These control valves can be continuously adjustable electrically operated valves or solenoid valves with only on / off functions. By adjusting the opening or closing of these valves, the water mist flow rate to the first air duct 101 and the second air duct 102 can be independently controlled.

[0067] This embodiment allows for independent adjustment of the flow rate of each humidification branch, enabling the system to accurately match humidification needs under different operating conditions. This avoids crude control by turning the system fully on or off, ensuring that the supply air humidity and temperature remain within a relatively small fluctuation range. For example, when only a small amount of humidification is needed, only one branch can be turned on and kept at a low opening level to avoid energy waste.

[0068] In some embodiments, the first humidification branch 310 is provided with a plurality of first outlets in the first air duct 101; for example, the first humidification branch 310 may extend one end in the first air duct 101 and be provided with a plurality of nozzles or spray bars.

[0069] In one example, the second humidification branch 320 has multiple second outlets within the second air duct 102. For example, the second humidification branch 320 may extend one end within the second air duct 102 and be provided with multiple nozzles or spray bars.

[0070] The arrangement of multiple nozzles or spray bars can be uniformly distributed along the width or height of the air duct cross-section, which not only effectively avoids local problems caused by single-point spraying, but also increases the contact area between water mist and air, accelerates the mixing speed, and improves the overall humidification efficiency.

[0071] like Figure 3 As shown, in some embodiments, the first humidification branch 310 is provided with a first control valve 410, and the second humidification branch 320 is provided with a second control valve 420; the air conditioning system also includes a controller, which is communicatively connected to the first control valve 410 and the second control valve 420. The controller is configured to control the first control valve 410 to open and the second control valve 420 to close; or, control the second control valve 420 to open and the first control valve 410 to close; or, control the first control valve 410 and the second control valve 420 to open simultaneously; or, control the first control valve 410 and the second control valve 420 to close simultaneously.

[0072] It is understandable that the first humidification branch 310 and the second humidification branch 320 are equipped with independent first control valves 410 and second control valves 420, respectively. The system controller (such as a PLC) can communicate with these two control valves via cables.

[0073] The controller has at least four pre-stored basic operating modes, which can be automatically switched based on external commands or programs: Mode 1: Defined as a safety mode, only the front branch is open, using the surface cooler 110 to prevent overhumidification; Mode 2: Defined as a high-efficiency mode, only the rear branch is open for rapid humidification; Mode 3: Defined as a full-load mode, both branches are open simultaneously for rapid humidification; Mode 4: Defined as a shutdown mode, both branches are closed to stop humidification. In this embodiment, the system can select a mode according to a preset strategy. Moreover, the multiple switchable operating modes enable the system to cope with various complex application scenarios, from regular humidification to rapid humidification, and from dry seasons to transitional seasons, while also reducing system energy consumption.

[0074] In some embodiments, the air conditioning system further includes a humidity sensor, which is at least disposed in the first humidification branch 310 and / or the first air duct 101; when the controller controls the first control valve 410 to be in the open state, when the humidity sensor detects that the water mist output exceeds a threshold, the surface cooler 110 is configured to dehumidify the fluid flowing through it.

[0075] Specifically, a humidity sensor is installed near the first humidification branch 310 or inside the first air duct 101 to monitor the air humidity before the surface cooler 110 in real time after humidification. When the controller controls the first control valve 410 to open for pre-humidification, it continuously receives signals from the humidity sensor. When the humidity value exceeds a preset safety threshold (indicating a risk of overhumidity), the controller immediately sends a command to the actuator (such as a chilled water valve or a refrigerant regulating valve) of the surface cooler 110 to start or increase its cooling and dehumidification capacity, thereby forcibly cooling and dehumidifying the overhumidified air flowing through it.

[0076] This embodiment, by linking humidification and dehumidification functions, can correct overhumidification in real time and improve the system's reliability under different operating conditions. Especially for humidity-sensitive industrial environments such as tobacco processing, this setting ensures that humidity remains within the strict range required by process specifications, guaranteeing product quality.

[0077] In some embodiments, the second humidification branch 320 and / or the second air duct 102 are also provided with humidity sensors; the first control valve 410 and the second control valve 420 are electrically adjustable valves, which are communicatively connected to the controller, which is configured to send opening information to the electrically adjustable valves according to the signal sent by the humidity sensor.

[0078] Specifically, in addition to installing humidity sensors in the pre-humidification branch, humidity sensors are also installed in the post-humidification branch or the second air duct 102 to monitor the final supply air humidity. Meanwhile, the first control valve 410 and the second control valve 420 are electrically adjustable valves with controllable opening. The controller receives signals from humidity sensors at different locations, calculates and compares them with the target humidity in real time, and then outputs continuous control signals to the electrically adjustable valves to proportionally adjust their opening, thereby precisely controlling the water mist flow rate.

[0079] In this embodiment, the combination of a humidity sensor and a controller enables direct feedback control of the supply air humidity, which helps maintain the ambient humidity within a relatively small fluctuation range. Furthermore, the system can automatically adjust the valve opening based on real-time load changes, ensuring stable water mist flow. Additionally, these features also prevent insufficient or excessive humidification, ensuring the system always operates at its optimal state.

[0080] In some embodiments, the humidification duct 300 is made of stainless steel. Exemplarily, stainless steel has significantly higher mechanical strength and rigidity than PVC, which is advantageous for manufacturing large-diameter humidification ducts 300. Large-diameter humidification ducts 300 can significantly reduce airflow resistance and deliver a larger volume of water mist, thereby solving the problem of insufficient humidification caused by duct diameter limitations. Furthermore, stainless steel ducts are corrosion-resistant and anti-aging, maintaining structural integrity and stable performance in humid air-conditioned environments for extended periods. This avoids the risks of PVC ducts aging, becoming brittle, and cracking, greatly extending the system's service life and reducing the frequency of replacement and maintenance.

[0081] In some embodiments, the humidifier 200 is an ultrasonic humidifier 200, and the water mist particles generated by the ultrasonic humidifier 200 have a particle size of 1μm-10μm. For example, the core of the ultrasonic humidifier 200 is to use the high-frequency mechanical vibration of the piezoelectric ceramic transducer (ultrasonic actuator) to directly generate capillary waves in the water, tearing the water into fine water mist. The specific principle can be understood by referring to relevant technologies, and will not be elaborated here.

[0082] In some embodiments, in at least two humidification branches, the outlet of the humidification branch connected to the first air duct 101 is at least partially oriented toward the air inlet surface of the surface cooler 110. For example, the axis of the outlet of the humidification branch is at an angle to the airflow direction, so that the sprayed water mist can be directly directed toward the heat exchange fin surface of the surface cooler 110, for example by designing the outlet as a bevel or installing a directional nozzle.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An air conditioning system, characterized in that, The air conditioning system includes: An air conditioning unit (100) includes a surface cooler (110) and an air supply duct. The surface cooler (110) is located in the air supply duct. The surface cooler (110) divides the air supply duct into a first duct (101) and a second duct (102) along the airflow direction. A humidifier (200) is located outside the air conditioning unit (100), and the humidifier (200) is configured to generate water mist; The humidification pipe (300) has an inlet connected to the humidifier (200), the humidification pipe (300) includes at least two humidification branches, the at least two humidification branches are connected to the inlet, and the outlets corresponding to the at least two humidification branches are connected to the first air duct (101) and the second air duct (102) respectively.

2. The air conditioning system according to claim 1, characterized in that, The air conditioning unit (100) also includes: A filter assembly (120) is disposed in the first air duct (101), and the outlet of one of the at least two humidification branches is located between the filter assembly (120) and the surface cooler (110); An air supply assembly (130) is disposed in the second air duct (102), and the outlet of the other of the at least two humidification branches is located between the surface cooler (110) and the air supply assembly (130).

3. The air conditioning system according to claim 2, characterized in that, The humidification pipe (300) includes a first humidification branch (310) and a second humidification branch (320); A control valve is provided on the first humidification branch (310) and / or the second humidification branch (320), and the control valve is configured to independently adjust the water mist delivery volume on the corresponding humidification branch.

4. The air conditioning system according to claim 3, characterized in that, The first humidification branch (310) has multiple first outlets within the first air duct (101); And / or, the second humidification branch (320) has multiple second outlets within the second air duct (102).

5. The air conditioning system according to claim 3, characterized in that, The first humidification branch (310) is provided with a first control valve (410), and the second humidification branch (320) is provided with a second control valve (420). The air conditioning system further includes a controller, which is communicatively connected to the first control valve (410) and the second control valve (420). The controller is configured to control the first control valve (410) to open and the second control valve (420) to close; or, control the second control valve (420) to open and the first control valve (410) to close; or, control the first control valve (410) and the second control valve (420) to open simultaneously; or, control the first control valve (410) and the second control valve (420) to close simultaneously.

6. The air conditioning system according to claim 5, characterized in that, The air conditioning system also includes a humidity sensor, which is at least located in the first humidification branch (310) and / or the first air duct (101). When the controller controls the first control valve (410) to be in the open state, and the humidity sensor detects that the water mist output exceeds the threshold, the surface cooler (110) is configured to dehumidify the fluid flowing through it.

7. The air conditioning system according to claim 6, characterized in that, The second humidification branch (320) and / or the second air duct (102) are also equipped with the humidity sensor; The first control valve (410) and the second control valve (420) are electrically adjustable valves. The electrically adjustable valves are communicatively connected to the controller. The controller is configured to send opening information to the electrically adjustable valves based on the signal sent by the humidity sensor.

8. The air conditioning system according to any one of claims 1-7, characterized in that, The humidification pipe (300) is made of stainless steel.

9. The air conditioning system according to any one of claims 1-7, characterized in that, The humidifier (200) is an ultrasonic humidifier, and the water mist particles generated by the ultrasonic humidifier have a particle size of 1μm-10μm.

10. The air conditioning system according to any one of claims 1-7, characterized in that, Of the at least two humidification branches, the outlet of the humidification branch connected to the first air duct (101) is at least partially oriented toward the air inlet of the surface cooler (110).

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