Linear water distributor refrigerating system for schools

Abstract

The invention discloses a high-energy-efficiency self-maintenance linear water distributor refrigerating system for schools. The system comprises a refrigerating host, a circulating water pump, an ultraviolet sterilizing unit, a linear water distributor and a variable cross-section micro-valve array. The treated cooling water enters a horizontal flow collecting cavity in the top of the water distributor through a water inlet pipe, and the cooling capacity is accurately distributed through a variable cross-section micro valve array; the variable cross-section micro-valve array adopts a wedge-shaped sliding block structure driven by piezoelectricity, and stepless gradient adjustment of the overflowing cross-sectional area is achieved through relative displacement of a sliding block inclined face and a flow channel outlet. The central controller drives the micro-valve array to act through a self-adaptive optimal control algorithm based on building thermal parameters and multi-dimensional environment health sensing data, and energy efficiency optimization is achieved while indoor environment comfort is guaranteed. The problems that an existing system is rough in cold distribution, high in maintenance cost and insufficient in biological safety can be solved, and high-precision adjustment and self-maintenance capacity are achieved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration and heat exchange technology, and in particular to a linear water distributor refrigeration system for use in schools. Background Technology

[0002] Refrigeration systems, especially central air conditioning systems, are indispensable infrastructure in large public buildings such as schools, hospitals, and office buildings, and are also major energy consumers. Refrigeration systems used in school environments face multiple challenges that traditional technologies cannot effectively address due to the unique nature of their application.

[0003] First, the occupancy load in school buildings exhibits a typical "tidal" fluctuation, meaning the buildings are densely packed with students during class hours and quickly emptied during breaks and after school. Existing cooling systems mostly employ passive control strategies based on temperature feedback, resulting in a delayed response and difficulty in accurately matching such drastic load changes. This not only leads to excessive cooling during breaks, causing significant energy waste, but also makes the rooms stuffy and hot at the start of the next class, affecting the comfort and learning efficiency of teachers and students.

[0004] Secondly, heat exchange equipment in refrigeration systems, such as cooling towers or evaporators, is highly susceptible to scale or biofilm formation on its heat exchange surfaces due to water quality issues. These scale layers have extremely high thermal resistance, rapidly deteriorating heat exchange efficiency and forcing the refrigeration unit to operate in a high-load, low-efficiency range, leading to a significant increase in system energy consumption. Traditional descaling methods, such as high-pressure water flushing or chemical cleaning, not only require system shutdown, disrupting normal school activities, but the chemicals may also corrode the equipment and cause secondary pollution. Especially during long school winter and summer breaks, prolonged shutdowns followed by restarts result in stubborn scale and microbial colonies forming inside the equipment, severely impacting the system's initial performance and hygiene.

[0005] Furthermore, existing refrigeration systems often focus solely on temperature control in their design, neglecting health indicators such as CO2 concentration, which significantly impact learning efficiency in classrooms. Additionally, noise generated during equipment operation and maintenance can disrupt the quiet learning environment. There is a lack of a comprehensive, systematic solution that fully meets the specific needs of schools, integrating high efficiency, energy saving, intelligent control, and proactive self-maintenance. Summary of the Invention

[0006] The purpose of this invention is to address the deficiencies in the existing technology by proposing a linear water distributor refrigeration system for schools.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A linear water distributor refrigeration system for use in schools, comprising: A linear water distributor having a heat exchange surface for heat exchange; Controller; A teaching activity load feedforward module is connected to the controller and configured to predict future cooling demand based on data related to school teaching activities. An actuator, connected to the controller, is configured to precisely distribute the cooling capacity delivered to the linear water distributor based on the predicted cooling demand.

[0008] Furthermore, the teaching activity load feedforward module is configured to load and store the school's electronic timetable data, and predict future cooling demand based on the electronic timetable data. Specifically, the future cooling demand is predicted through the following steps: Calculate the static foundation cooling load, which is determined based on the building thermal parameters of the classroom and external meteorological data; Calculate the dynamic heat load of personnel, which is determined based on the teaching activity time, classroom number and preset class size extracted from the electronic timetable data; The static basic cooling load is superimposed with the dynamic heat load of the personnel to generate a total cooling demand prediction curve for each classroom.

[0009] Furthermore, the actuator is a variable cross-section microvalve array, and the controller distributes the cooling capacity by controlling the opening degree of each microvalve in the variable cross-section microvalve array.

[0010] Furthermore, it also includes a multi-dimensional environmental health sensing module, which includes a CO2 concentration sensor and / or an infrared human activity sensor installed in the classroom. The multidimensional environmental health sensing module is connected to the controller, and the controller is further configured to adjust the actuator in real time based on the detection signals of the multidimensional environmental health sensing module.

[0011] Furthermore, it also includes a dual-mode silent descaling unit integrated within the linear water distributor, the dual-mode silent descaling unit comprising at least one piezoelectric ceramic vibrator, the piezoelectric ceramic vibrator being laid and bonded to the outer wall surface of the non-contact fluid side of the heat exchange surface; The piezoelectric ceramic oscillators are arranged in an interlaced matrix, with the arrangement density increased locally in the preset water flow stagnation zone.

[0012] Furthermore, the controller is configured to drive the piezoelectric ceramic oscillator to generate pseudo-random frequency sweep vibrations in the subacoustic frequency band during preset non-teaching periods, so as to perform silent descaling on the heat exchange surface.

[0013] Furthermore, the controller is also configured to automatically execute a self-cleaning program during preset holiday periods, wherein the self-cleaning program specifically includes the following logical steps: S1. Triggering and self-testing: When the cumulative settling time reaches a preset threshold, the program is triggered and electrical self-tests are performed on the circulating water pump, the ultraviolet disinfection unit and the piezoelectric ceramic vibrator. S2. Microcirculation activation: Start the circulating water pump at a low frequency to restore the flow of water in the pipeline; S3, High-intensity pulsed ultraviolet disinfection: Drives the ultraviolet disinfection unit to work in high-frequency pulse mode to disinfect the circulating water; S4. Ultrasonic impact peeling: Drive the piezoelectric ceramic vibrator to oscillate at high power in the ultrasonic frequency band to peel off the attached material; S5. Settling and Reset: After the ultrasonic shock peeling is completed, stop the operation of all execution units, enter the preset settling period, and after the settling period is completed, reset the program and return the system to sleep mode.

[0014] Furthermore, the heat exchange surface is a heterogeneous functional surface, which has functional grooves along the flow direction to suppress turbulence in the mainstream area where the water film flows at high speed, and has a hydrophobic coating to suppress fouling in the area where the flow is slow. The functional groove is a V-shaped rib structure continuously distributed along the mainstream water flow direction. The geometry of the V-shaped ribs is configured to match the fluid boundary layer characteristics of the mainstream region in order to reduce the wall friction resistance.

[0015] Furthermore, the linear water distributor includes a nozzle array, wherein the nozzles in the nozzle array adopt an asymmetric functional structure with built-in guide ribs. The asymmetry is manifested in that, on a cross section perpendicular to the water flow direction, the radius of curvature of one side wall of the nozzle structure is smaller than the radius of curvature of the other side wall, which is used to generate an asymmetric pressure distribution when the fluid is ejected, thereby inducing transverse vortices.

[0016] Furthermore, the controller is configured to coordinate the opening of the variable cross-section microvalve array based on the classroom environmental health index generated by the multi-dimensional environmental health sensing module, so as to dynamically tilt the cooling capacity towards classrooms with high personnel density or high CO2 concentration.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: By introducing a teaching activity load feedforward module based on the school's electronic timetable, the cooling demand of each classroom can be predicted in advance, enabling pre-deployment of energy and avoiding the lag and waste of traditional passive control. Combined with real-time feedback adjustment based on multi-dimensional parameters such as CO2 concentration, the accuracy of cooling distribution is further ensured, guaranteeing the best teaching environment while saving energy.

[0018] By integrating a dual-modal silent descaling unit, it can perform routine, predictive descaling in a silent manner during non-teaching periods without affecting teaching. Its unique holiday self-cleaning program solves the common industry problem of severe performance degradation and hygiene concerns after long holiday shutdowns, extends the manual cleaning cycle, reduces the use of chemical agents, and ensures long-term stable and efficient operation of the system.

[0019] By employing heterogeneous functional surfaces with functional grooves and hydrophobic coatings, as well as asymmetric nozzle arrays capable of inducing transverse micro-vortices, the flow resistance and heat transfer resistance are minimized based on the underlying logic of fluid mechanics and surface physics, thereby improving the operating efficiency of the refrigeration unit and inhibiting the adhesion of dirt from the source. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0021] Figure 1 This is an overall structural block diagram of the refrigeration system provided in an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of the linear water distributor in an embodiment of the present invention; Figure 3 This is a top view of the linear water distributor in an embodiment of the present invention; Figure 4 This is a schematic diagram of the nozzle array structure in an embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the principle of a single nozzle impacting the heat exchange surface in an embodiment of the present invention. Figure 6 This is a logic flowchart of the holiday self-cleaning procedure in an embodiment of the present invention; Figure 7 This is a flowchart of the autonomous cleaning program control logic in an embodiment of the present invention; Figure 8 This is a diagram showing the overall water circulation and control topology of the system in this embodiment of the invention. Figure 9 This is a flowchart illustrating the control logic of the variable cross-section microvalve array in an embodiment of the present invention. Figure 10This is a partial cross-sectional structural diagram of the variable cross-section microvalve unit in an embodiment of the present invention.

[0022] In the figure: 100, linear water distributor; 200, heat exchange surface; 300, functional groove; 400, nozzle array; 401, nozzle array base; 500, nozzle; 501, asymmetric functional structure; 502, flow guide rib; 600, piezoelectric ceramic oscillator. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] like Figure 1-10 As shown, a linear water distributor refrigeration system for schools has the following system topology: A circulating water collection tray is located at the bottom of the system. A circulating water pump pressurizes cooling water from the collection tray into the main pipeline. An ultraviolet disinfection unit is connected in series in the main pipeline for instantaneous biosafety treatment of the cooling water. The treated cooling water enters the horizontal collection chamber at the top of the linear water distributor 100 through a vertically installed inlet pipe. At the junction of the bottom outlet of the horizontal collection chamber and the nozzle array base 401, a variable cross-section micro-valve array 110 is provided. By adjusting the instantaneous flow rate entering each zone, precise distribution of cooling capacity is achieved.

[0025] It should be noted that the variable cross-section microvalve array used as the actuator in this invention does not refer to a specific product model, but rather to a type of integrated valve unit capable of continuous and adjustable flow control of multiple fluid streams. Its core feature is "variable cross-section," meaning that the valve opening can change linearly and continuously, rather than simply being in two states: "on" and "off," thereby achieving fine-tuning of the flow rate.

[0026] like Figure 8 As shown, the variable cross-section microvalve array 110 includes multiple microvalve units arranged in parallel. Each microvalve unit includes a piezoelectric actuator and a wedge-shaped slider driven by it. The wedge-shaped slider is installed in the flow channel at the bottom of the horizontal manifold, and its bottom surface has a preset slope. When the piezoelectric actuator receives a displacement command from the central controller, it generates a vertically downward thrust, driving the wedge-shaped slider deeper into the flow channel. By utilizing the relative spatial change between the slider's inclined surface and the flow channel outlet, the micron-level vertical displacement is linearly converted into a continuous gradient adjustment of the flow cross-sectional area. This variable cross-section physical adjustment method effectively eliminates the step effect of traditional on / off valves, achieving stepless and precise control of the water inlet flow rate at the terminal nozzle. Those skilled in the art can implement this array using various mature technical approaches, including but not limited to the following two: A preferred implementation is a microvalve array based on microelectromechanical systems (MEMS) technology. This array integrates multiple independent microvalve units on a single substrate (such as a silicon substrate) using microfabrication processes. Each microvalve unit typically includes a microchannel, a flexible thin film or cantilever beam covering the channel, and a microactuator. The microactuator can employ piezoelectric, electrostatic, or thermal actuation principles. Digital control signals from a central controller can precisely control the drive voltage or power of each actuator, thereby enabling precise micron-level displacement of the flexible thin film and achieving continuous, stepless adjustment of the microchannel cross-sectional area.

[0027] Another feasible approach is to use a miniaturized proportional solenoid valve array. This array integrates multiple small-diameter proportional solenoid valves onto a common valve body or manifold. The spool position of each proportional solenoid valve is proportional to the current or voltage signal applied to the coil. A central controller outputs an analog voltage signal (e.g., 0-10V) or a pulse width modulation (PWM) signal to the drive circuit of each valve. The drive circuit precisely controls the current in the solenoid coil, thereby causing the spool to move linearly, changing the flow cross-sectional area of ​​the valve orifice, and achieving proportional control of the refrigerant flow through the valve.

[0028] In a preferred embodiment, a variable cross-section microvalve array is installed on the primary side fluid manifold, with each individual microvalve corresponding to the end pipe of one or a group of classrooms, thereby giving the central controller the ability to perform independent and precise cold drip irrigation for each teaching unit.

[0029] The system includes a high-performance central controller, which can be an embedded microprocessor or an industrial-grade programmable logic controller in terms of hardware architecture. It is responsible for executing complex control algorithms and is coupled and coordinated with functional intelligent modules through an internal data bus and an external wireless communication network, including: a teaching activity load feedforward module responsible for forward-looking load modeling and prediction. A multi-dimensional environmental health sensing module responsible for real-time, high-precision capture of indoor environmental dynamics; And a dual-mode silent descaling unit deeply integrated inside the linear water distributor 100, responsible for ensuring the long-term efficient operation of the system.

[0030] In terms of operational logic, a multi-timescale, hierarchical control architecture is adopted. Among them, the teaching activity load feedforward module performs deterministic load prediction based on daily or weekly school timetable data, providing the system with basic operating curves and energy scheduling benchmarks. Meanwhile, the multi-dimensional environmental health perception module captures and quantifies random and sudden environmental changes in the classroom caused by personnel activities in real time at a shorter timescale of seconds or minutes. The central controller dynamically fuses and decouples the deterministic prediction signal from the feedforward module and the stochastic feedback signal from the sensing module. Through an adaptive optimal control algorithm, it generates a final, smooth, and precise sequence of control commands, which drives the actuators to make real-time and fine-grained adjustments to the cooling capacity distribution of each terminal unit. This ensures environmental comfort and health while optimizing the overall energy efficiency of the system.

[0031] The specific technical means employed by the central controller are as follows: 1) Load forecasting: using the formula Determine the static foundation cooling load, among which The heat transfer coefficient of the school's exterior walls. For heat exchange area, This is an indoor interference compensation item; 2) Health Assessment: Parameters are collected through a sensor network within the classroom, and an assessment function is run. Generate an environmental health index; 3) Fusion Control: The controller dynamically fuses the feedforward load prediction signal with the randomly acquired health index feedback signal, and uses an adaptive PID algorithm to generate a displacement command sequence for the actuator, driving the variable cross-section microvalve array 110 to move. This method transforms the originally vague 'comfort' requirement into a physically executable flow channel cross-sectional area parameter.

[0032] The heat exchange surface 200 of the linear water distributor 100 can be made of copper with excellent thermal conductivity or stainless steel alloy with good thermal conductivity and corrosion resistance. The heat exchange surface 200 of the entire linear water distributor 100 is divided into partitioned surfaces to construct a heterogeneous functional surface with synergistic functions.

[0033] In terms of specific physical construction, the linear water distributor 100 includes an outer shell, which forms a closed or semi-closed space to accommodate all internal components and serves as structural support and fluid guidance. The shell is provided with multiple fluid interfaces; specifically, its sidewalls or endwalls have primary fluid inlets and outlets for connecting to the internal fluid circulation loops that need to be cooled. Simultaneously, the upper part of the shell also has a spray water inlet for connecting to an external water circulation loop used for spray cooling. Inside the shell, a heat exchange tube bundle, serving as the core heat exchange surface 200, is arranged horizontally or vertically. The heat exchange tube bundle consists of multiple independent heat exchange tubes arranged in parallel, and the primary fluid inlet and outlet are connected to both ends of the heat exchange tube bundle. Directly above the heat exchange tube bundle, a nozzle array 400 is provided, with its nozzle array base 401 connected to the spray water inlet. Directly below the heat exchange tube bundle, a water collection tray is provided at the bottom of the shell to collect the spray water flowing down from the outer surface of the heat exchange tube bundle and guide it back to the external water circulation system.

[0034] On the heat exchange surface 200, in the mainstream region of high-speed shearing of the water film determined by computational fluid dynamics (CFD) simulation, a V-shaped rib structure continuously arranged axially along the mainstream water flow direction is prepared by laser interference lithography or precision rolling microforming process. This continuously arranged V-shaped rib structure is the functional groove described in this invention. The micro-geometry of the V-shaped rib structure, especially its height, spacing, and V-angle, is used to achieve optimal matching with the fluid boundary layer characteristics (especially the thickness of the viscous sublayer) of the cooling water at typical Reynolds numbers. Specifically, by reconstructing the near-wall flow field, the high-energy fluid bulk is effectively isolated from the low-energy wall, thereby suppressing the intensity of momentum exchange and the generation of turbulent bursts, ultimately achieving a significant reduction in wall friction resistance and indirectly reducing the driving energy consumption of the water pump.

[0035] In the near-wall region, corners, and other areas of the heat exchange surface 200 that are confirmed by simulation to have slow flow or be prone to forming recirculation vortices, a superhydrophobic nano-coating with a micro-nano composite structure is applied using processes such as plasma-enhanced chemical vapor deposition (PECVD). This coating creates a cushion effect similar to the surface of a lotus leaf by superimposing nano-scale villous structures on a micron-scale rough structure, reducing the wettability of the solid-liquid interface. This makes it difficult for scale-causing ions to find effective nucleation and attachment sites on the surface, thus eliminating the initial conditions for scale formation from a physical perspective. At the same time, the extremely low surface energy also makes it difficult for pollutants such as biofilms to adhere, giving the heat exchange surface 200 excellent passive self-cleaning properties.

[0036] The nozzle array 400 of the linear water distributor 100 is a micro-vortex structure that induces and can actively control the intense heat transfer within the sprayed water film. Each nozzle 500 adopts an asymmetric functional structure 501 with built-in guide ribs 502. Its asymmetry is achieved through the asymmetric design of the internal geometry of the nozzle 500. Specifically, in the cross section perpendicular to the water flow direction, the radius of curvature of one side wall of the nozzle 500 internal cavity is designed to be significantly smaller than the radius of curvature of the other side wall. When the pressurized fluid flows at high speed through this asymmetric scaling channel, an uneven static pressure distribution will be generated on both sides of the wall due to the difference in flow velocity. This endogenous pressure gradient will drive the fluid to generate a stable lateral deflection torque when it is ejected. At the same time, the built-in guide ribs 502 inside the nozzle 500 linearly guide and shape this deflection torque, ultimately ensuring that the water film ejected from the nozzle 500 can stably form a controllable lateral micro-vortex similar to the wingtip vortex of an airfoil the moment it leaves the nozzle. The existence of this vortex causes the particles inside the water film to undergo intense mixing and disturbance. Its kinetic energy can continuously impact and tear the laminar thermal boundary layer with great thermal resistance attached to the heat exchange surface 200, transforming the heat exchange process from the traditional, inefficient static heat conduction-dominated mode to the efficient, dynamic forced convection-dominated mode, thereby achieving a multiple-level increase in the heat transfer coefficient.

[0037] The teaching activity load feedforward module includes a machine learning model based on time series analysis (e.g., a Long Short-Term Memory network, LSTM). This model is pre-trained using historical school operational data (timetables, energy consumption, weather). In actual operation, the model takes the latest electronic timetable data as input and combines it with external weather forecast data to output a total cooling demand forecast curve accurate to each classroom within 15-minute time steps for the next 24 hours. The model also possesses adaptive learning and online calibration capabilities, continuously using actual operational data to correct and optimize its forecast accuracy.

[0038] The multi-dimensional environmental health sensing module collects multi-dimensional environmental parameters in real time, including CO2 concentration, PM2.5, volatile organic compounds (VOCs), and the presence status of personnel, through a wireless sensor network deployed in each classroom. This data is transmitted to the central controller, which uses a multivariate weighted dynamic evaluation function to calculate the collected data in real time, generating a dynamic classroom environmental health index that comprehensively reflects the quality of the indoor learning environment. This index serves as a feedback basis for real-time correction of the feedforward prediction signal.

[0039] The dual-mode silent descaling unit consists of multiple piezoelectric ceramic resonators 600, which are excited by a central controller through a dedicated high-frequency piezoelectric drive circuit with precise frequency and amplitude control capabilities. The specific implementation mechanisms of its two operating modes are as follows: Silent Descaling Mode: During non-teaching periods, the drive circuit outputs a broadband swept-frequency signal with a center frequency in the subsonic band and superimposed with a pseudo-random sequence modulation. The pseudo-random characteristic of this signal is designed to avoid standing wave effects and vibration dead zones that may occur at a single frequency, ensuring that vibration energy can act on the entire heat exchange surface 200 in a diffuse and uniform manner, effectively loosening and preventing further growth and solidification of microscale crystal nuclei.

[0040] Holiday Autonomous Cleaning Program: During holiday periods, the system automatically executes a deep cleaning program. In the high-intensity pulsed ultraviolet (HIP) disinfection step, the deep ultraviolet UVC-LED units within the pipeline (with a center wavelength of 275nm in a preferred embodiment, this band being most efficient at destroying microbial DNA) are driven by a high-frequency pulse power supply to inactivate the circulating water with extremely high instantaneous radiant flux. This program can also integrate a water quality sensor to quantitatively evaluate the cleaning effect by comparing changes in water conductivity or turbidity before and after cleaning, and automatically generate a maintenance log.

[0041] It should be noted that, in the embodiments of the present invention, the selection of the piezoelectric ceramic oscillator 600 is mainly based on the following functional and performance requirements: The selected piezoelectric ceramic oscillator 600 must have wide frequency response characteristics, and its resonant frequency and effective operating frequency range must be able to cover the subacoustic frequency band required by the present invention, for example, 5Hz to 20Hz and the ultrasonic frequency band, for example, 25kHz to 40kHz, to ensure that it can perform two different operating modes: silent descaling and ultrasonic impact.

[0042] The piezoelectric ceramic oscillator 600 should have sufficiently high electromechanical conversion efficiency and output power to ensure that, under the excitation of the drive signal, it can generate a mechanical stress wave on the heat exchange surface 200 that is strong enough to overcome the adhesion of scale and biofilm.

[0043] The piezoelectric ceramic oscillator 600 is preferably in the form of a sheet or a disk, and is encapsulated with waterproof and corrosion-resistant materials to adapt to the humid and hot environment inside the refrigeration system and ensure long-term operational reliability.

[0044] Based on the above performance requirements, select or customize any piezoelectric ceramic oscillator 600 that meets the requirements from the market.

[0045] like Figure 7 As shown, the present invention provides a method for the operation and self-maintenance of a refrigeration system, the specific steps of which include: S1. When the system's cumulative static time reaches a preset threshold or enters a preset time period, the central controller triggers a self-test program. First, it drives the piezoelectric actuator in the variable cross-section microvalve array 110 to drive the wedge slider to perform a 'fully open-fully closed' mechanical calibration, while simultaneously performing an electrical self-test on the circulating water pump 700 and the ultraviolet disinfection unit 800.

[0046] S2-S3. Start the circulating water pump 700 to perform low-frequency pulse circulation, disturbing suspended impurities in the pipeline; then activate the ultraviolet disinfection unit 800 installed in the inlet section of the linear water distributor 100 to perform instantaneous biosafety treatment on the cooling water flowing before the variable cross-section micro valve.

[0047] S4. The central controller calculates the required cooling capacity for each zone based on the Environmental Health Index (HI) fed back by the sensor network in the classroom. By controlling the vertical displacement of the wedge slider in each micro-valve unit, the flow cross-sectional area is dynamically changed by utilizing the relative positional relationship between the slider's inclined surface and the bottom of the horizontal flow channel, thereby precisely controlling the instantaneous water flow rate entering the lower nozzle array 400.

[0048] S5-S6. During or after operation, the piezoelectric ceramic vibrator 600, installed on the side wall of the water distributor, generates an ultrasonic cavitation effect to peel off the initial scale buildup on the inner wall of the nozzle 500. Finally, the wedge slider is driven to return to the initial protection position to close the flow channel, prevent particulate matter from entering, and the system enters a dormant state. To better understand the technical solution of the present invention, the following description is provided in conjunction with example scenarios.

[0049] In one example: On a typical school day, in the early morning, based on the predictions from the teaching activity load feedforward module, the system anticipates the peak load of the first class. It then pre-cools the cooling unit and gradually increases cooling output using an optimized energy curve. During class, the multi-dimensional environmental health sensing module detects a decline in the "environmental health index" of a certain senior classroom due to high occupancy. The central controller responds immediately, dynamically increasing cooling and fresh air supply to that classroom without compromising overall energy efficiency. During breaks, the system automatically enters a low-power cruise mode based on predicted "off-peak periods" in the timetable. In the afternoon, the system again smoothly increases output based on predictions to handle the afternoon's class load. Late at night, after confirming no activity in the building, the system automatically activates the silent descaling mode of the dual-modal silent descaling unit, performing routine maintenance seamlessly. The entire process, like an experienced building manager, precisely, efficiently, and silently ensures the health, comfort, and energy efficiency of the entire teaching environment.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A linear water distributor refrigeration system for use in schools, characterized in that, include: Refrigeration unit, circulating water pump, ultraviolet disinfection unit; linear water distributor (100) having a heat exchange surface (200) for heat exchange; controller; A teaching activity load feedforward module, connected to the controller, is configured to predict future cooling demand based on data related to school teaching activities. The variable cross-section microvalve array (110), as the actuator of the system, is located between the water inlet collection chamber of the linear water distributor (100) and the nozzle array base (401). The variable cross-section microvalve array is composed of a wedge-shaped slider driven by a piezoelectric actuator. The size of the horizontal flow cross-sectional area of ​​the flow channel is changed by the vertical displacement of the wedge-shaped slider.

2. The system according to claim 1, characterized in that, The teaching activity load feedforward module is configured to load and store the school's electronic timetable data, and predict future cooling demand based on the electronic timetable data. Specifically, the future cooling demand is predicted through the following steps: Calculate the static foundation cooling load, which is determined based on the building thermal parameters of the classroom and external meteorological data; Calculate the dynamic heat load of personnel, which is determined based on the teaching activity time, classroom number and preset class size extracted from the electronic timetable data; The static basic cooling load is superimposed with the dynamic heat load of the personnel to generate a total cooling demand prediction curve for each classroom.

3. The system according to claim 2, characterized in that, The actuator is a variable cross-section microvalve array, and the controller distributes the cooling capacity by controlling the opening degree of each microvalve in the variable cross-section microvalve array.

4. The system according to claim 3, characterized in that, It also includes a multi-dimensional environmental health sensing module, which includes a CO2 concentration sensor and / or an infrared human activity sensor installed in the classroom. The multidimensional environmental health sensing module is connected to the controller, and the controller is further configured to adjust the actuator in real time based on the detection signals of the multidimensional environmental health sensing module.

5. The system according to claim 1, characterized in that, It also includes a dual-mode silent descaling unit integrated in the linear water distributor (100), the dual-mode silent descaling unit including at least one piezoelectric ceramic oscillator (600), the piezoelectric ceramic oscillator (600) being laid and bonded to the outer wall surface of the heat exchange surface (200) on the non-contact fluid side; The piezoelectric ceramic oscillators (600) are arranged in an interlaced matrix, and the arrangement density is locally increased in the preset water flow stagnation zone.

6. The system according to claim 5, characterized in that, The controller is configured to drive the piezoelectric ceramic oscillator (600) to generate pseudo-random frequency sweep vibration in the subacoustic band during preset non-teaching periods, so as to perform silent descaling on the heat exchange surface (200).

7. The system according to claim 5, characterized in that, The controller is also configured to automatically execute a self-cleaning program during preset holiday periods, wherein the self-cleaning program specifically includes the following logical steps: S1. Triggering and self-testing: When the cumulative settling time reaches a preset threshold, the program is triggered and electrical self-tests are performed on the circulating water pump, the ultraviolet disinfection unit and the piezoelectric ceramic oscillator (600); S2. Microcirculation activation: Start the circulating water pump at a low frequency to restore the flow of water in the pipeline; S3, High-intensity pulsed ultraviolet disinfection: Drives the ultraviolet disinfection unit to work in high-frequency pulse mode to disinfect the circulating water; S4, Ultrasonic Impact Peeling: Drive the piezoelectric ceramic vibrator (600) to oscillate at high power in the ultrasonic frequency band to peel off the attached material; S5. Settling and Reset: After the ultrasonic shock peeling is completed, stop the operation of all execution units, enter the preset settling period, and after the settling period is completed, reset the program and return the system to sleep mode.

8. The system according to claim 1, characterized in that, The heat exchange surface (200) is a heterogeneous functional surface, which has functional grooves (300) along the flow direction to suppress turbulence in the mainstream area where the water film flows at high speed, and has a hydrophobic coating to suppress dirt adhesion in the area where the flow is slow. The functional groove (300) is a V-shaped rib structure continuously distributed along the mainstream direction of water flow. The geometry of the V-shaped rib is configured to match the fluid boundary layer characteristics of the mainstream region in order to reduce the frictional resistance of the wall surface.

9. The system according to claim 1, characterized in that, The linear water distributor (100) includes a nozzle array (400), wherein the nozzles (500) in the nozzle array (400) adopt an asymmetric functional structure (501) with built-in guide ribs (502), wherein, in a cross section perpendicular to the water flow direction, the radius of curvature of one side wall of the nozzle (500) structure is smaller than the radius of curvature of the other side wall.

10. The system according to claim 4, characterized in that, The controller is configured to coordinate the opening of the variable cross-section microvalve array based on the classroom environmental health index generated by the multi-dimensional environmental health sensing module, so as to dynamically tilt the cooling capacity towards classrooms with high personnel density or high CO2 concentration.

Images