A distributed micro-porous jet temperature control system for a factory environment and a control method thereof

Abstract

This invention relates to the field of factory environmental control technology, and discloses a distributed micro-orifice jet temperature control system and its control method for factory environments. The system includes a central unit, a main air supply duct, branch hoses, workstation-level electromagnetic regulating valves, female quick-connect fittings with leak-proof check valves, and terminal equipment with male quick-connect fittings. The terminal equipment is equipped with a hollow column composed of an outer and inner tube, a telescopic locking mechanism, and low-voltage cables with a helical spring-like extension structure. It also includes an AI controller, an ambient temperature sensor, a body surface temperature sensor, a personnel presence sensor, and a pulse width modulation generator. This invention uses leak-proof check valves to block airflow in vacant workstations to avoid energy loss, utilizes the helical spring-like extension structure to prevent breakage of low-voltage cables, and uses the AI ​​controller to adjust the flow cross-sectional area of ​​the workstation-level electromagnetic regulating valves based on multi-sensor parameters to achieve safe flow interruption and protect personnel at the workstations.

Description

Technical Field

[0001] This invention relates to the field of factory environmental control technology, specifically to a distributed micro-orifice jet temperature control system and its control method for factory environments. Background Technology

[0002] In modern factory workshops, it is common to configure factory environmental temperature control systems to deliver regulating airflow to different independent workstations, thereby regulating the local ambient temperature of these workstations. In existing factory environmental temperature control systems, the regulating airflow is directly distributed to each independent workstation through delivery pipes. However, when some independent workstations are unattended or their terminal equipment is not connected, traditional factory environmental temperature control systems cannot automatically cut off the airflow output, causing the regulating airflow to continuously spray aimlessly in the vacant area, resulting in energy loss and a lack of fluid flow control measures at the independent workstation level.

[0003] To accommodate the operational needs of personnel at different workstations, workstation terminals are generally equipped with hollow columns for adjusting the overall height. These hollow columns typically consist of an inner tube and an outer tube. During the sliding and telescoping adjustment of the inner tube relative to the outer tube, the low-voltage cables located within the hollow cavity of the column are susceptible to mechanical stretching or compression. Because these low-voltage cables lack automatic positioning and buffering mechanisms, they are prone to misalignment, breakage, or jamming within the hollow column, ultimately leading to signal transmission interruptions and reducing the stability of the factory's environmental temperature control system.

[0004] Furthermore, traditional factory environmental temperature control systems typically only perform routine ambient temperature control, lacking baseline safety verification and intelligent control mechanisms that integrate multi-dimensional parameters. During operation, these systems cannot comprehensively calculate based on ambient temperature, worker body temperature, and activity level, causing them to continue idling even after workers have left. Moreover, traditional systems cannot adjust the flow area of ​​valves at workstations based on real-time worker body temperature. In cooling or heating conditions, they cannot provide emergency flow interruption when worker body temperature reaches extreme safety limits, potentially leading to excessive cooling shocks or localized burns from overheating, thus compromising worker safety. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a distributed micro-orifice jet temperature control system and its control method for factory environments. It solves the problems of energy loss caused by adjusting airflow jet when an independent workstation is unattended, breakage or jamming of low-voltage cables during the telescopic adjustment of hollow columns, and excessive cooling or overheating of workstation personnel due to the lack of baseline safety verification.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a distributed micro-orifice jet temperature control system for factory environments, comprising a central unit, main and secondary pipe networks, actuators, and terminal equipment. The central unit is located in the fluid source area. The main and secondary pipe networks include a main air supply duct and multiple branch hoses. The main air supply duct is fixed at the air outlet of the central unit. The main air supply duct has an air outlet hole, and a T-joint is fixed at the air outlet hole.

[0007] The branch hose is fitted onto the tee connector and locked by clamp fasteners. The actuating component includes a station-level solenoid regulating valve, which is connected in series at the end of the branch hose. The branch hose is connected to the air inlet of the station-level solenoid regulating valve.

[0008] The outlet of the station-level electromagnetic regulating valve is equipped with a female quick-connect connector, and the terminal equipment is equipped with a male quick-connect connector. The terminal equipment is connected to the female quick-connect connector through the male quick-connect connector. The central unit, the main and secondary pipelines, the actuators and the terminal equipment are connected in series.

[0009] Preferably, a first flange is installed on the edge of the air outlet duct of the central unit, and a second flange is installed on the edge of the air inlet end of the main air supply duct. The first flange and the second flange are fastened together by bolts and nuts.

[0010] The main air supply duct is made of aluminum foil flexible tubing, and the entire circumferential outer wall of the main air supply duct is covered with an insulation layer, and an aluminum foil moisture-proof film is pasted on the outer surface of the insulation layer.

[0011] Preferably, the female quick-connect fitting has an internal receiving cavity, and an air-proof one-way valve is arranged in the receiving cavity. The air-proof one-way valve includes a sealing valve seat, a valve core, and a return spring.

[0012] The sealing valve seat is fixedly disposed on the inner wall of the receiving cavity. An airflow channel is provided at the center of the sealing valve seat. The valve core is disposed downstream of the sealing valve seat. One end of the return spring abuts against the bottom surface of the receiving cavity, and the other end of the return spring abuts against the rear end face of the valve core.

[0013] Preferably, the terminal device is a workstation terminal, which is provided with the male quick-connect connector, terminal base, hollow column, universal fluid joint and spray panel;

[0014] The male quick-connect connector is fixedly installed on the side of the terminal base. The hollow column is welded and fixed to the upper surface of the terminal base. The hollow column is composed of an outer tube and an inner tube. The bottom end of the outer tube is fixedly connected to the terminal base.

[0015] Preferably, the top end of the outer tube is threaded with a telescopic locking mechanism, which consists of a locking nut and a conical clamping ring, and the inner tube is vertically nested in the internal cavity of the outer tube.

[0016] Preferably, the top end of the inner tube is connected to the universal fluid joint, which is specifically a hollow universal ball joint;

[0017] The ball joint of the hollow universal ball joint is fixedly connected to the spray panel. The front surface of the spray panel has multiple micro-holes, and the inner wall of each micro-hole is formed into a tapered micro-nozzle structure that narrows outward.

[0018] Preferably, the workstation terminal is equipped with a terminal multimodal sensor network, which includes a body surface temperature sensor, a personnel presence sensor, and an ambient temperature sensor.

[0019] Preferably, the body surface temperature sensor and the personnel presence sensor are fixed at the front edge of the spray panel;

[0020] The ambient temperature sensor is fixedly installed at the center of the back of the spray panel or on the outer side of the hollow column.

[0021] Preferably, an AI main controller including wiring terminals is fixedly installed at the lower end of the outer wall of the outer tube. The side of the housing of the AI ​​main controller is arranged with sensor input terminal blocks and control output terminal blocks. The AI ​​main controller is also equipped with a manual control switch.

[0022] The body surface temperature sensor, the personnel presence sensor, and the ambient temperature sensor are each connected to a low-voltage cable. The low-voltage cable passes through the interior of the hollow universal ball joint and extends into the inner cavity of the outer tube. The portion of the low-voltage cable located in the inner cavity of the outer tube forms a spiral spring-shaped extension structure. The end of the low-voltage cable is connected to the input interface of the AI ​​main controller.

[0023] A second aspect of the present invention provides a control method for a distributed micro-orifice jet temperature control system used in a factory environment, comprising the following steps:

[0024] The data acquisition layer initiates synchronous acquisition of multi-source sensor signals. The ambient temperature sensor acquires the background temperature and converts it into an ambient temperature value. The body surface temperature sensor acquires the surface radiation energy and converts it into a body surface temperature value. The personnel presence sensor acquires the Doppler echo signal to calculate the activity intensity value and acquires the state signal to obtain the presence state Boolean value.

[0025] The outer ring calculation layer extracts the ambient temperature value and the activity intensity value, and calculates the target body surface temperature value by combining the reference body surface temperature constant, the ambient temperature compensation coefficient and the activity intensity compensation coefficient.

[0026] The inner loop control layer extracts the target body surface temperature value and the real-time acquired body surface temperature value, subtracts the real-time acquired body surface temperature value from the target body surface temperature value to obtain the body surface temperature deviation value, and derives the basic solenoid valve opening command.

[0027] The central processing unit of the AI ​​main controller monitors the numerical change of the existence state Boolean value in real time. When the existence state Boolean value changes from true to false, it starts an internal timer and accumulates the duration of the unattended state. Based on the existence state Boolean value and the duration of the unattended state, it switches the basic solenoid valve opening command to a composite opening control command. The preset delay threshold is set within the parameter range of 30 to 60 seconds.

[0028] A bottom-line safety verification and forced output intervention strategy based on working condition mode is established. The determination is made based on the working mode variable, the minimum safe body temperature threshold, the maximum safe body temperature threshold and the real-time acquired body surface temperature value. The composite opening control command is modified into the final execution command. The minimum safe body temperature threshold is set to 32℃ and the maximum safe body temperature threshold is set to 38℃.

[0029] The final execution command is converted into a pulse width modulation signal by a pulse width modulation generator, which is then transmitted to the corresponding station-level electromagnetic regulating valve to adjust the flow cross-sectional area.

[0030] This invention provides a distributed micro-orifice injection temperature control system and its control method for use in factory environments. It has the following beneficial effects:

[0031] 1. This invention, through the configuration of a central unit, main air supply duct, branch hoses, workstation-level electromagnetic regulating valves, female quick-connect fittings, and male quick-connect fittings, distributes the regulated airflow generated by the central unit to different independent workstations via the main air supply duct. The workstation-level electromagnetic regulating valves are connected in series at the ends of the branch hoses. The terminal equipment is sealed and connected to the female quick-connect fittings via the male quick-connect fittings. When the workstation is unattended or the terminal equipment is not connected, the leak-proof one-way valve inside the female quick-connect fitting is in a closed state, blocking the output of the regulated airflow and avoiding energy loss caused by the unauthorized jetting of air in the vacant area, thus achieving fluid flow control at the workstation level.

[0032] 2. This invention, by setting a hollow column consisting of an outer tube and an inner tube and a telescopic locking mechanism at the workstation terminal, allows for flexible and free adjustment of the overall height on-site according to the sitting or standing posture of the workers. Simultaneously, by processing the portion of the low-voltage cable located within the hollow cavity of the outer tube into a spiral spring-like extension structure, when the inner tube slides upwards or downwards relative to the outer tube to adjust the height, the low-voltage cable automatically extends or retracts along the axis of the outer tube using the elastic restoring force of the material, always remaining within the central axis area of ​​the hollow cavity inside the outer tube. This prevents the low-voltage cable from being pulled apart or jammed inside the column, thus meeting the needs for multi-posture and multi-height adjustment on-site while protecting the continuity of signal transmission.

[0033] 3. This invention utilizes an AI main controller to perform intelligent calculations and closed-loop control based on data synchronously collected from multiple sensors. This enables adaptive and precise adjustment of airflow when people are present, interruption when people leave, and increased airflow when temperatures are high and decreased when temperatures are low. This improves the refined temperature control level and energy efficiency of independent workstations. Simultaneously, a safety baseline check is implemented during cooling or heating operations, completely closing the valve when body surface temperature reaches its limit to prevent cold shock or localized burns. The manual control switch added to the AI ​​main controller provides a high-priority interface for on-site personnel, enabling seamless switching between fully automatic intelligent adjustment and manual control. This enhances the operational flexibility, fault tolerance, and personalized user experience of the temperature control system. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a partially enlarged schematic diagram of the flange connection of the present invention;

[0036] Figure 3 This is a partially enlarged schematic diagram of the flow splitting point of the tee connector of the present invention;

[0037] Figure 4 This is a schematic diagram of the workstation terminal structure of the present invention;

[0038] Figure 5 This is a partially enlarged schematic diagram of the quick-connect connector of the present invention;

[0039] Figure 6 This is a block diagram of the electrical control and Internet of Things communication architecture of the present invention;

[0040] Figure 7 This is the main flowchart of the control method of the present invention;

[0041] Figure 8 This is a flowchart of the safety and anti-idling intervention logic sub-flow of the present invention.

[0042] The components include: 1. Central unit; 2. Air outlet duct; 3. First flange; 4. Main air supply duct; 5. Second flange; 6. Branch hose; 7. T-joint; 8. Clamp fastener; 9. Female quick-connect fitting; 10. Male quick-connect fitting; 11. Terminal base; 12. Outer pipe; 13. Inner pipe; 14. Telescopic locking mechanism; 15. Hollow universal ball joint; 16. Spray panel; 17. Micro-holes. Detailed Implementation

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] See attached document Figure 1 - Appendix Figure 5 The present invention provides a distributed micro-orifice injection temperature control system for factory environments, including a central unit 1, main and secondary pipelines, actuators and terminal equipment.

[0045] The central unit 1 is independently located in the fluid source area of ​​the factory workshop, responsible for supplying regulated airflow after temperature adjustment. The main and secondary pipelines include the main air supply duct 4 and multiple branch hoses 6. The inlet end of the main air supply duct 4 is sealed and fixed to the outlet duct 2 of the central unit 1 by a flange bolt assembly. The main air supply duct 4 extends horizontally along the roof beams or support frames of the factory workshop, forming a suspended structure above the factory workshop. Multiple air outlet holes are opened on the surface of the main air supply duct 4, and a T-joint 7 is welded and fixed at each air outlet hole.

[0046] The air inlets of multiple branch hoses 6 are respectively fitted onto the branch outlets of each tee connector 7, sealed and locked by clamp fasteners 8, and extend downwards from the main air supply duct 4 in a direction perpendicular to the ground, forming air supply paths pointing to each independent workstation below. The main air supply duct 4 and the branch hoses 6 are arranged in a staggered manner, and the main and secondary pipe networks distribute the regulated airflow generated by the central unit 1 to different independent workstations.

[0047] The actuators include multiple independent, series-connected station-level solenoid control valves at the ends of corresponding branch hoses 6. Specifically, the bottom outlet of the branch hose 6 is threadedly connected to the inlet of the station-level solenoid control valve. A female quick-connect fitting 9 is fixedly installed on the outer wall of the outlet of the station-level solenoid control valve.

[0048] The terminal equipment connects to the female quick-connect connector 9 on the outlet of the workstation-level electromagnetic regulating valve via its male quick-connect connector 10, regulating the airflow into the terminal equipment. The terminal equipment is fixedly installed on a desktop, ground deployment point, or external docking point. These points are located on the tabletop, floor, or wall of an independent workstation. When deployed on the tabletop, it is secured to the edge of the tabletop using bolts or clamping structures. When deployed on the floor, it stands upright near the workstation using a weighted base structure. When deployed at an external docking point, it is fixed to the workstation desktop or wall near the workstation. The central unit 1, main and secondary piping networks, actuators, and terminal equipment are connected in series via pipelines, forming a complete physical transport topology network.

[0049] See attached document Figure 2 A first flange 3 is fixedly installed on the outer periphery of the air outlet duct 2 of the central unit 1, and a second flange 5 is fixedly installed on the outer periphery of the air inlet end of the main air supply duct 4. The first flange 3 and the second flange 5 are fastened together by bolts and nuts, and a sealing gasket is filled between the mating surfaces. The regulated airflow generated inside the central unit 1 enters the main air supply duct 4 through the air outlet duct 2, the first flange 3, and the second flange 5.

[0050] The main air supply duct 4 uses an aluminum foil flexible hose, with its entire circumference covered by an insulation layer. The insulation layer is made of rubber-plastic insulation material or rock wool, and its outer surface is sealed with an aluminum foil moisture-proof film, completely covering the outer surface of the main air supply duct 4 and blocking heat exchange between the regulated airflow inside the duct and the external ambient air. The duct wall of the main air supply duct 4 is tightly fitted with the insulation layer, and the aluminum foil moisture-proof film prevents moisture from the external environment from penetrating to the duct wall, thus forming an anti-condensation structure and preventing surface dripping when the main air supply duct 4 is delivering cold air.

[0051] See attached document Figure 3 The main air supply duct 4 has multiple fluid branching nodes on its side wall. These nodes are formed by air outlet holes on the side wall of the main air supply duct 4 and T-joints 7 fixed at the outlet holes. The straight section inlet of the T-joint 7 extends into the outlet hole and is sealed and fixed to the main air supply duct 4 by welding. The branch outlet end extends out of the main air supply duct 4 and points downwards. The inlet of the branch hose 6 is fitted onto the branch outlet end of the T-joint 7. The overlapping portion of the branch hose 6 and the T-joint 7 is radially locked by clamp fasteners 8. The regulated airflow inside the main air supply duct 4 is distributed to the branch hose 6 through the T-joints 7.

[0052] Multiple branch hoses 6 are used to guide the regulated airflow inside the main air supply duct 4 to each independent work station. The clamp fastener 8 is wrapped in a ring shape around the outer wall of the air inlet end of the branch hose 6. The surface is provided with a threaded locking structure. When the threaded locking structure is in the tightened state, the inner diameter of the clamp fastener 8 shrinks and applies radial extrusion force to the air inlet end of the branch hose 6, so that the inner surface of the branch hose 6 is sealed tightly against the outer circumference of the branch outlet end of the tee connector 7, preventing the regulated airflow from leaking from the connection gap.

[0053] Branch hose 6 extends vertically from the top of the workshop to an independent workstation. Its bottom outlet connects to the inlet of the workstation-level solenoid valve. The workstation-level solenoid valve is fixedly locked to the surface of a fixed column on the side of the independent workstation via a fastening bracket. The outer wall of the inlet has an external thread structure. A metal connector is sealed and fixed inside the bottom outlet of branch hose 6. The inner wall of the metal connector has an internal thread structure that matches the external thread structure. The internal and external threads are screwed together to achieve a sealed connection between the bottom outlet of branch hose 6 and the inlet of the workstation-level solenoid valve. The outlet of the workstation-level solenoid valve is sealed with a female quick-connect fitting 9 via threaded connection or welding.

[0054] The female quick-connect connector 9 has an internal cavity containing a leak-proof one-way valve arranged from the air inlet to the air outlet. The leak-proof one-way valve includes a sealing valve seat, a valve core, and a return spring. The sealing valve seat is fixed to the inner wall of the air inlet end of the cavity, and a through airflow channel is located at the center of the sealing valve seat. The valve core is located downstream of the sealing valve seat. One end of the return spring abuts against the inner bottom surface of the air outlet end of the cavity, and the other end abuts against the rear end face of the valve core. When the independent workstation is unattended and the terminal equipment is not connected, the return spring is in a freely open or slightly compressed state, applying an upward axial force to the rear end face of the valve core, tightly pressing the front end face of the valve core against the sealing valve seat. The valve core completely blocks the airflow channel at the center of the sealing valve seat, and the leak-proof one-way valve is in a closed, shut-off state.

[0055] When the male quick-connect connector 10 of the terminal device is axially inserted into the female quick-connect connector 9, its foremost end contacts and pushes the valve core. The applied axial thrust overcomes the axial elastic force of the return spring, pushing the valve core away from the sealing valve seat, and compressing the return spring. After the valve core leaves the sealing valve seat, the airflow channel at the center of the sealing valve seat opens, and the regulating airflow bypasses the outside of the valve core and flows into the terminal device from the air passage inside the male quick-connect connector 10. When the male quick-connect connector 10 is pulled out of the female quick-connect connector 9, the axial thrust on the valve core disappears, the return spring recovers its elastic deformation and releases its elastic force, pushing the valve core to move in the opposite direction. The valve core is then pressed back onto the sealing valve seat, blocking the output of the regulating airflow.

[0056] See attached document Figure 4 and attached Figure 5 As a specific implementation structure of terminal equipment, the present invention provides a workstation terminal, which is provided with a male quick-connect connector 10, a terminal base 11, a hollow column, a universal fluid joint and a spray panel 16.

[0057] The male quick-connect connector 10 is fixedly installed on the side of the terminal base 11, which is placed horizontally on the ground or table of an independent workstation. A hollow column is welded to the center of its upper surface. The hollow column has a nested structure of inner and outer tubes 12, consisting of an outer tube 12 and an inner tube 13. The bottom end of the outer tube 12 is fixedly connected to the terminal base 11. The internal air passage of the male quick-connect connector 10 communicates with the internal cavity of the outer tube 12.

[0058] The inner tube 13 is vertically nested within the inner cavity of the outer tube 12. A sealing ring is provided between the outer wall of the inner tube 13 and the inner wall of the outer tube 12. A telescopic locking mechanism 14 is threadedly connected to the top outer side of the outer tube 12. The telescopic locking mechanism 14 consists of a locking nut and a conical clamping ring. When the locking nut is tightened, it presses the conical clamping ring tightly against the outer wall surface of the inner tube 13, restricting the axial sliding of the inner tube 13 relative to the outer tube 12. This keeps the overall height of the hollow column within a set value between 1.2 meters and 1.8 meters, allowing the overall height to be determined on-site according to the working posture of the workers. For example, the hollow column can be adjusted to be lower when the workers are seated and higher when they are standing, flexibly adapting to different on-site operating needs. The regulating airflow inside the outer tube 12 enters the inner tube 13 through the bottom opening, achieving internal air passage connectivity.

[0059] The top air outlet of the inner tube 13 is connected to a universal fluid joint, which is a hollow universal ball joint 15. The ball part of the hollow universal ball joint 15 is fixed to the top air outlet of the inner tube 13 by threads. The ball head seat is fitted on the outside of the ball part and forms a ball joint movable connection with the ball part, providing three-dimensional rotational freedom. A through fluid channel is opened in the direction of the central axis. The regulating airflow inside the inner tube 13 is transported to the outside of the hollow universal ball joint 15 through the fluid channel.

[0060] The ball joint of the hollow universal ball joint 15 is fixedly connected to the air inlet on the back of the spray panel 16. The spray panel 16 has an internal cavity, with the back air inlet communicating with the cavity. An internal cavity guide channel extends from the back air inlet to the periphery of the spray panel 16, diverting the regulating airflow. Multiple micro-holes 17 are formed on the front surface of the spray panel 16. The diameter of the micro-holes 17 ranges from 0.5 mm to 2 mm, and they are arranged in a fan-shaped array on the front surface of the spray panel 16. To enhance the jet kinetic energy and collimation direction of the regulating airflow, the inner wall of each micro-hole 17 is formed into a tapered micro-nozzle structure that narrows outwards from the inside (i.e., the rear port diameter of the micro-hole 17 on the inner cavity side of the spray panel 16 is larger than the front port diameter on the front surface side), thus substantially constructing an integrated micro-nozzle configuration inside each micro-hole 17. The regulated airflow inside the cavity is accelerated and guided by the conical micro-nozzle structure, and then sprayed into the personnel area of ​​the independent workstation through multiple micro-holes 17.

[0061] The terminal device is equipped with a multimodal sensor network, which includes a body surface temperature sensor, a personnel presence sensor, and an ambient temperature sensor. The body surface temperature sensor and the personnel presence sensor are fixed at the front edge of the spray panel 16 at the workstation terminal via either embedded or external mounting. The detection lens of the body surface temperature sensor faces the personnel area directly in front of the spray panel 16, with the detection direction parallel to the flow direction of the regulating airflow emitted from the micro-orifice 17. Similarly, the detection window of the personnel presence sensor also faces the personnel area directly in front of the spray panel 16. The sensing range of both sensors covers the personnel target within the diffusion range of the regulating airflow, used to acquire real-time body temperature data and personnel presence status.

[0062] The ambient temperature sensor is fixedly installed at the center of the back of the spray panel 16 or on the outer side of the hollow column. It is spatially separated from the micro-holes 17 on the front of the spray panel 16 by the panel structure layer. The temperature sensing end faces away from the micro-holes 17 and is outside the area where hot and cold air flow. The position avoids direct airflow. The collected data reflects the original temperature background of the work area when it is not subject to local temperature control intervention.

[0063] The signal output terminals of the body surface temperature sensor, the personnel presence sensor, and the ambient temperature sensor are respectively connected to low-voltage cables. After being led out from each sensor, the low-voltage cables converge into the internal cavity of the spray panel 16, pass through the through-flow channel inside the hollow universal ball head 15 and extend into the inner tube 13, and then run along the inner wall of the inner tube 13 to the internal cavity of the outer tube 12.

[0064] To prevent cable breakage or jamming during height adjustment of the hollow column within the 1.2-meter to 1.8-meter range, the portion of the low-voltage cable within the inner cavity of the outer tube 12 is designed as a spiral spring-like extension structure. When the inner tube 13 slides upward relative to the outer tube 12 to increase the overall height of the hollow column, the spiral spring-like extension structure of the low-voltage cable extends and elongates along the axis of the outer tube 12 under axial tension. When the inner tube 13 slides downward to reduce height, the spiral spring-like extension structure of the low-voltage cable automatically rebounds and retracts using its own material elasticity, always remaining within the central axis region of the inner cavity of the outer tube 12, thus forming a protective structure against cable breakage and jamming within the column. After passing through the inner cavity of the outer tube 12, the low-voltage cable exits through a sealed outlet hole at the bottom of the hollow column, with its end connected to the input interface of the AI ​​main controller.

[0065] As an alternative structure, the body surface temperature sensor, the personnel presence sensor, and the ambient temperature sensor are each connected to a wireless communication module, which sends the collected signals to the AI ​​main controller.

[0066] As an alternative implementation structure for the terminal equipment, the ventilated industrial chair is installed at a ground deployment point in an independent workstation. A male quick-connect connector 10 and a miniature solenoid valve are fixedly mounted on the lower surface of the chair's base. The outer wall of the male quick-connect connector 10 fits into the female quick-connect connector 9, guiding the regulated airflow from the branch hose 6 into the ventilated industrial chair. The air outlet is sealed and locked to the air inlet of the miniature solenoid valve via a metal rigid pipe. The miniature solenoid valve is securely screwed onto the lower edge of the base plate.

[0067] The outlet of the miniature solenoid valve is threadedly connected to the input end of a Y-shaped splitter tube. This Y-shaped splitter tube is concealed and fixed within the frame of the ventilated industrial seat, distributing and regulating airflow and branching into a first output end and a second output end. The ventilated industrial seat includes a seat cushion and a backrest. The seat cushion and backrest each have a sealed internal cavity. The first output end of the Y-shaped splitter tube is sealed to the seat cushion cavity via a first air guide hose, and the second output end is sealed to the backrest cavity via a second air guide hose. The regulating airflow emitted by the miniature solenoid valve flows through the Y-shaped splitter tube and is diverted into the seat cushion cavity and the backrest cavity.

[0068] The outer front surface of the seat cushion facing the human body is covered with a breathable mesh, as is the outer front surface of the backrest facing the human body. The breathable mesh has high-density perforations that connect the internal cavities of the seat cushion and the backrest. The bottom plates on the side of the seat cushion and backrest away from the human body are sealed with non-breathable materials. The regulated airflow flowing into the internal cavities of the seat cushion and backrest is blocked by the sealed bottom plates and overflows outward through the breathable mesh, blowing directly onto the person sitting on the ventilated industrial chair.

[0069] The top edge of the backrest of the ventilated industrial chair integrates and is fixedly mounted with a body surface temperature sensor, a personnel presence sensor, and an ambient temperature sensor. The non-contact infrared detection lens of the body surface temperature sensor faces directly forward of the ventilated industrial chair, and its detection range corresponds to the neck and back of the seated personnel. The detection window of the personnel presence sensor also faces directly forward of the ventilated industrial chair, and is used to detect whether the workstation personnel are seated. The ambient temperature sensor is fixed to the back of the top edge of the backrest, outside the flow area of ​​the airflow from the breathable mesh, preventing the airflow from directly blowing on the temperature-sensing area.

[0070] As another optional implementation of the terminal equipment, the wearable breathable clothing docking component is set at the external docking point of the independent workstation. The external docking point is specifically located on the workstation desktop or the wall near the workstation. A female quick-connect base is fixedly installed on the workstation desktop or wall. The air inlet port of the female quick-connect base is connected to the air outlet of the corresponding workstation-level electromagnetic regulating valve through threaded sealing, forming an external docking base structure.

[0071] The wearable breathable garment docking assembly also includes a garment worn by the worker at the workstation. The garment has a hollow, shunting layer inside, and a flexible air tube is sealed and fixed at the waist. The free end of the flexible air tube is fixedly connected to a male quick-connect fitting 10, and the fixed end communicates with the air passage inside the hollow shunting layer. The outer insertion portion of the male quick-connect fitting 10 matches the inner insertion portion of the female quick-connect base.

[0072] The internal valve core one-way sealing structure, axial insertion locking mechanism, and fluid communication opening principle between the female quick-connect base and the male quick-connect connector 10 are completely consistent with the mechanical mating structure between the female quick-connect connector 9 connected in series at the end of the branch hose 6 and the male quick-connect connector 10 of the terminal equipment. Therefore, the same mechanical components and spring reset flow interruption process will not be described again here. When the male quick-connect connector 10 is axially inserted into the female quick-connect base and locked, the regulating airflow inside the branch hose 6 flows into the male quick-connect connector 10 through the one-way valve channel opened inside the female quick-connect base, and is then transported to the hollow distribution interlayer inside the garment via a flexible air tube, thus achieving fluid airway connectivity.

[0073] The garment features evenly spaced ventilation holes on the inner fabric of the chest, back, and neckline. Regulated airflow, introduced through flexible air tubes into the hollow split layer, is then forced through these ventilation holes and directed towards the worker's skin for close-fitting temperature control.

[0074] See attached document Figure 6 The electrical control link is networked via an AI main controller with terminal blocks. The AI ​​main controller is fixedly installed at the lower end of the outer wall of the outer tube 12 at the workstation terminal, or as an alternative structure, it can be fixedly installed under the table of an independent workstation, or it can be fixedly installed on the lower surface of the base plate of a ventilated industrial chair. Sensor input terminal blocks and control output terminal blocks are arranged on the side of the housing. The sensor input terminal blocks consist of multiple sets of screw-pressed double-core terminals. The control output terminal blocks consist of multiple sets of electrical plug-in terminals for transmitting pulse width modulation signals.

[0075] The AI ​​main controller's housing also integrates a manual control switch. This manual control switch is electrically connected to the internal central processing unit, providing a human intervention interface. When workers need to manually control the system, they can forcibly open or close the workstation-level electromagnetic regulating valve or manually adjust the airflow by operating this manual control switch, achieving seamless switching between automatic and manual control. Furthermore, the manual control command response has a higher priority than the automatically input multimodal sensor processing logic.

[0076] The AI ​​controller's casing also integrates a wireless IoT communication module. This module establishes a two-way data communication link with the factory's cloud-based IoT management platform located in the factory's upper control center via a wireless network. The module periodically packages data stored in the central processing unit's internal registers—ambient temperature, body surface temperature, activity intensity, presence status Boolean values, and the current final execution instruction's duty cycle—into IoT data frames and reports them to the factory's cloud-based IoT management platform via the wireless network. Based on the received data frames, the factory's cloud-based IoT management platform performs plant-wide energy consumption statistics and generates energy consumption and comfort analysis reports. Simultaneously, the platform can also send remote configuration commands to the AI ​​controller via the wireless network to modify register parameters such as preset delay thresholds and minimum safe temperature thresholds.

[0077] In specific wiring, when the terminal device is a workstation terminal, the low-voltage cables from the body surface temperature sensor, the personnel presence sensor, and the ambient temperature sensor converge in the internal cavity of the spray panel 16, and pass axially through the hollow universal ball joint 15 and the inner tube 13, exiting from the sealed cable outlet at the bottom of the hollow column. When the terminal device is a ventilated industrial chair, each low-voltage cable exits from the top edge of the backrest and extends along the seat frame to the lower surface of the base plate. When the terminal device is a wearable breathable clothing docking assembly, each low-voltage cable exits from around the external docking point. The connectors of each low-voltage cable are respectively plugged into the sensor input terminal block of the AI ​​main controller. The sensor input terminal block inputs the body temperature voltage signal acquired by the body surface temperature sensor, the presence status level signal acquired by the personnel presence sensor, and the ambient temperature voltage signal acquired by the ambient temperature sensor into the AI ​​main controller.

[0078] The AI ​​controller's control output terminal block establishes electrical connections with either the workstation-level electromagnetic regulating valve or the miniature electromagnetic valve of the ventilation industrial seat via control wires. One end of the first control wire is connected to the first pulse output terminal of the control output terminal block, and the other end is connected to the electromagnetic drive coil terminal of the workstation-level electromagnetic regulating valve corresponding to the independent workstation. One end of the second control wire is connected to the second pulse output terminal of the control output terminal block, and the other end is connected to the signal control terminal of the miniature electromagnetic valve under the ventilation industrial seat. The AI ​​controller sends pulse width modulation signals through the first and second control wires to control the valve core displacement of the workstation-level electromagnetic regulating valve and the continuous opening displacement of the miniature electromagnetic valve, so that both solenoid valves are in a proportional adjustment state corresponding to the duty cycle of the pulse width modulation signal, forming a complete electrical and fluid control loop.

[0079] The overall working process and principle of the distributed micro-orifice injection temperature control system for factory environments provided by this invention are as follows:

[0080] The central unit 1 continuously outputs cooled or heated air after heat exchange. The regulated airflow passes through the outlet duct 2, over the tightly connected first flange 3 and second flange 5, and flows entirely into the suspended main air supply duct 4. The main air supply duct 4 acts as a fluid artery spanning the entire workshop, using welded T-joints 7 along the way to cut and divert the main airflow, forcing the airflow to descend vertically along multiple branch hoses 6 to reach the area directly above each independent workstation, completing a rough spatial distribution from the fluid source to the air above the workstation.

[0081] Once the male quick-connect connector 10 and the female quick-connect connector 9 are axially and rigidly connected, the pushing force immediately forces the internal sealing valve core to retract, instantly opening up the previously blocked air supply dead end. If the independent workstation is a vertical workstation terminal, the regulated airflow will rise along the outer pipe 12 and inner pipe 13, pass over the hollow universal ball head 15 and enter the inner cavity of the spray panel 16, and finally transform into countless micro-jet streams that are transmitted from the micro-holes 17, evenly covering the body surface of the stationed personnel; if the independent workstation is a seat or clothing equipment, the air supply path is transformed into permeation through specific mesh holes or fabric pores, directly constructing a dedicated microclimate barrier within the close-fitting area.

[0082] Body surface temperature sensors, personnel presence sensors, and ambient temperature sensors positioned in front of personnel act like electronic tentacles, continuously scanning environmental background fluctuations, capturing personnel presence signals, and measuring surface radiation energy. The AI ​​controller aggregates this multi-dimensional data, calculates the real-time flow scaling ratio according to its built-in comfort optimization logic, and issues pulse width modulation levels with corresponding duty cycles. These pulse levels of specific widths directly drive the valve cores of each solenoid valve to produce displacements of varying amplitudes, performing stepless compression or expansion of the air supply cross-sectional area. Simultaneously, once the radar detects that a person has left their workstation, the AI ​​controller immediately blocks the pulse output, forcibly closing the valves to prevent ineffective flow of fluid media in empty areas.

[0083] See attached document Figure 7 This invention provides a distributed micro-orifice injection temperature control method for factory environments, the control architecture of which is divided into a data acquisition layer, an outer loop calculation layer, an inner loop control layer and an execution layer;

[0084] The data acquisition layer corresponds to the terminal multimodal sensor network, which includes a body surface temperature sensor, a person presence sensor, and an ambient temperature sensor. The signals acquired by the data acquisition layer are transmitted to the central processing unit of the AI ​​main controller via low-voltage cables or wireless networks. The outer loop calculation layer is located in the internal central processing unit of the AI ​​main controller and is used to calculate the target body surface temperature. The inner loop control layer is also located in the internal central processing unit and is used to deduce the solenoid valve opening command based on the temperature deviation. The execution layer includes control output terminal blocks, control wires, station-level solenoid regulating valves, and miniature solenoid valves, which are responsible for receiving pulse width modulation signals and adjusting the airflow.

[0085] During the startup phase, the AI ​​controller is powered on and begins operation. The AI ​​controller then performs a zeroing operation on the historical temperature data stored in its internal registers and the final execution command. After the variables are zeroed, the AI ​​controller sends a data handshake packet to Central Unit 1, which receives the packet and sends back a successful verification code. Once the communication handshake verification is successful, the AI ​​controller sets the fluid data acquisition time interval to 0.5 seconds. After this setting is complete, the AI ​​controller enters a timed cyclic scheduling state.

[0086] This invention provides a distributed micro-orifice jet temperature control method for use in factory environments, which specifically includes the following steps:

[0087] S1. The data acquisition layer initiates synchronous acquisition of multi-source sensor signals at 0.5-second intervals. The ambient temperature sensor collects the background temperature around the independent workstation and inputs the collected ambient temperature voltage signal to the sensor input terminal block of the AI ​​main controller via a low-voltage cable, or wirelessly transmits it to the AI ​​main controller via a wireless communication module. The central processing unit inside the AI ​​main controller reads the ambient temperature voltage signal received by the sensor input terminal block or received by the wireless communication module, converts the ambient temperature voltage signal into the corresponding Celsius value, and obtains the real-time ambient temperature, which is defined as the ambient temperature value.

[0088] The body surface temperature sensor collects the surface radiation energy of personnel within an independent workstation and inputs the collected infrared radiation voltage signal to the sensor input terminal block via a low-voltage cable, or wirelessly transmits it to the AI ​​main controller via a wireless communication module. The central processing unit extracts the infrared radiation voltage signal received by the sensor input terminal block or via the wireless communication module, converts it into the corresponding temperature value, and obtains the real-time human body surface temperature, defined as the body surface temperature value.

[0089] The personnel presence sensor employs a millimeter-wave radar sensor, which continuously transmits microwave signals to the personnel area of ​​independent workstations and receives Doppler echo signals generated by human movement during operation. The central processing unit derives the activity intensity of the personnel target based on the frequency fluctuation of the Doppler signal output by the personnel presence sensor within the current control cycle or the pulse trigger count, defining it as the activity intensity value.

[0090] The method for calculating the activity intensity value is as follows: Within the current control cycle, a sliding time window with a span of 5 seconds is set, and the sliding time window is divided into equal parts. In each sub-sampling time period, the central processing unit reads the number of high-level pulses output by the presence sensor within each sub-sampling time period in real time. The activity intensity value is calculated by weighted summation of the pulse counts across all sub-sampling time periods within the sliding time window. The formula for calculating the activity intensity value is as follows:

[0091] ;

[0092] In the formula, This represents the activity intensity value of a person, and its value is positively correlated with the intensity of the person's physical movements. This represents the total number of sub-sampling time intervals within the sliding time window; This indicates the sampling time sequence number of the current control cycle; Indicates the historical sampling backtracking sequence number; Indicates the first The total number of pulses output by the sensor during the sampling period; Indicates assigning the first The weighting coefficients for each sub-sampling time period are determined, and the weighting coefficients follow a progressively increasing pattern from historical moments to the current moment, in order to increase the weighting of the influence of the current motion state on the activity intensity value.

[0093] The presence sensor collects status signals indicating whether a person is present at the independent workstation. The collected signal level is input to the sensor input terminal block via a low-voltage cable or wirelessly transmitted to the AI ​​controller via a wireless communication module. The central processing unit (CPU) reads the received presence status signal. When the presence status signal is high, the CPU assigns a true value to the presence Boolean value, indicating that the workstation is occupied. When the presence status signal is low, the CPU assigns a false value, indicating that the workstation is unoccupied. The CPU stores the synchronously acquired ambient temperature, body surface temperature, activity intensity, and presence status Boolean value in its internal registers, completing the synchronous signal acquisition.

[0094] S2. The outer loop calculation layer extracts the ambient temperature and activity intensity values ​​from the internal registers and performs dynamic optimization calculation of the target body surface temperature value. The outer loop calculation layer uses the reference body surface temperature constant, ambient temperature compensation coefficient, and activity intensity compensation coefficient to adjust the temperature compensation for changes in the current independent workstation environment and the target movement state of the personnel.

[0095] The baseline body surface temperature constant is set as the constant body surface temperature of the target person under standard comfort conditions. The ambient temperature compensation coefficient is used to quantify the impact of fluctuations in external ambient temperature on the thermal sensation of the target person. The activity intensity compensation coefficient is used to quantify the adjustment range of local temperature control required by the target person when changes in heat generated by metabolism occur. When a state Boolean value is true, the central processing unit substitutes the ambient temperature value and activity intensity value into the algebraic calculation formula to calculate the target body surface temperature value that fits the current state.

[0096] The algebraic formula for calculating the target body surface temperature value is as follows:

[0097] ;

[0098] In the formula: This indicates the target body surface temperature value; This represents the surface temperature constant of the reference body; Indicates the ambient temperature compensation coefficient; Indicates the ambient temperature value; This represents the activity intensity compensation coefficient; This indicates the activity intensity value.

[0099] The central processing unit (CPU) multiplies the ambient temperature value and the ambient temperature compensation coefficient to obtain the ambient temperature correction component; it also multiplies the activity intensity value and the activity intensity compensation coefficient to obtain the activity intensity correction component. The CPU then subtracts the ambient temperature correction component from the baseline body surface temperature constant and adds the activity intensity correction component to complete the algebraic calculation of the target body surface temperature value. This algebraically calculated target body surface temperature value serves as the input target for the inner loop control layer, used for deviation comparison with the real-time acquired body surface temperature values.

[0100] S3, the inner loop control layer extracts the target body surface temperature value and the real-time body surface temperature value from internal registers and performs real-time calculation of the error variable. The central processing unit subtracts the real-time body surface temperature value from the target body surface temperature value to obtain the current temperature control error, which is defined as the body surface temperature deviation value.

[0101] The formula for calculating the body surface temperature deviation is as follows:

[0102] ;

[0103] In the formula: This indicates the deviation value of body surface temperature; This indicates the target body surface temperature value; This indicates the body surface temperature value.

[0104] The central processing unit (CPU) pre-stores fixed proportional, integral, and derivative coefficients. The proportional coefficient is calibrated based on the fluid hysteresis characteristics of the docking components of the workstation terminal, ventilated industrial chair, or wearable breathable clothing. The integral coefficient is calibrated based on the temperature control requirements for eliminating static error at independent workstations. The derivative coefficient is calibrated based on the fluctuation rate of body surface temperature. The proportional, integral, and derivative coefficients are distinct constant parameters.

[0105] The central processing unit (CPU) combines the calculated body surface temperature deviation value with pre-stored proportional, integral, and derivative coefficients to perform time-domain calculations, deriving the basic solenoid valve opening command in the time domain. The proportional-integral-derivative (PID) formula for the basic solenoid valve opening command in the time domain is as follows:

[0106] ;

[0107] In the formula: This represents the basic solenoid valve opening command in the time domain; Indicates the proportionality coefficient; This represents the deviation of body surface temperature over time in the time domain. Indicates the integral coefficient; Indicates the time variable of integration; Represents the differential coefficient; Indicates the current control time.

[0108] See attached document Figure 8 The S4 central processing unit incorporates a personnel status detection and anti-idleness delay intervention algorithm, which monitors the changes in the Boolean value of the status in real time within a fixed control cycle. When the status Boolean value changes from true to false, the central processing unit starts an internal timer, which accumulates and calculates the duration of the unattended state at the independent workstation, defining it as the unattended state duration. The central processing unit has a preset delay threshold, with the specific value set within the parameter range of 30 to 60 seconds, to prevent frequent cut-off of the temperature-controlled fluid due to brief absence of personnel at the workstation.

[0109] The central processing unit (CPU) executes a composite control command switching based on the presence status Boolean value and the duration of the unoccupied state. When the presence status Boolean value remains true, it indicates that the independent workstation is in a manned state, and the CPU determines that there is no need to activate the anti-idleage delay intervention, directly confirming the basic solenoid valve opening command as the control output target. When the presence status Boolean value becomes false and the unoccupied state duration is less than or equal to the preset delay threshold, it indicates that the unoccupied state duration has not exceeded the safety boundary, and the CPU maintains the output state of the basic solenoid valve opening command. When the presence status Boolean value remains false and the unoccupied state duration exceeds the preset delay threshold, the CPU determines that the independent workstation has entered a completely idle state, triggers the anti-idleage cutoff interlock, forces the control output to zero, and blocks the regulating airflow from the main air supply duct 4 to the terminal equipment.

[0110] When the state Boolean value is true, the central processing unit clears the internal timer, and the duration of the unattended state is reset and remains at 0. The formula for calculating the composite opening control instruction is as follows:

[0111] ;

[0112] In the calculation formula for the composite opening control command: This represents a composite opening control command in the time domain; This represents the basic solenoid valve opening command in the time domain; Indicates the duration of the unattended state; This indicates the preset delay threshold.

[0113] After the central processing unit (CPU) obtains the composite opening control command in the time domain, it converts the composite opening control command into the corresponding electrical control signal. The electrical control signal is transmitted to the station-level electromagnetic regulating valve or miniature electromagnetic valve through the control output terminal block and control wire, changing the mechanical displacement of the valve core to achieve precise control of the airflow delivery of independent workstations, eliminating the energy loss caused by unauthorized air injection in unmanned conditions.

[0114] S5. To prevent workers from suffering from cold shock, frostbite, or burns from extremely hot air under different seasonal working conditions, the central processing unit (CPU) has established a bottom-line safety verification and forced output intervention strategy based on operating condition mode. The CPU internally pre-sets and stores operating mode variables, minimum safe body temperature thresholds, and maximum safe body temperature thresholds. The operating mode variable is used to mark the operating condition of central unit 1. When the operating mode variable equals 0, it means that central unit 1 is in summer cooling mode, at which time central unit 1 outputs cold air; when the operating mode variable equals 1, it means that central unit 1 is in winter heating mode, at which time central unit 1 outputs hot air. The specific value of the minimum safe body temperature threshold is set to 32℃, serving as the bottom line for cold shock protection under cooling mode; the specific value of the maximum safe body temperature threshold is set to 38℃, serving as the top line for burn protection under heating mode.

[0115] Within each control cycle, the central processing unit first extracts the values ​​of the current operating mode variables and reads the real-time body surface temperature values:

[0116] When the central processing unit determines that the working mode variable is equal to 0 and the body surface temperature value is lower than the minimum safe body temperature threshold, it determines that the current worker is in an overcooled state. The central processing unit immediately activates the first forced intervention program, ignores the current PID regulation output, and forcibly resets the final execution instruction to zero, so that the workstation-level electromagnetic regulating valve or micro electromagnetic valve is completely closed, cutting off the output of the cold air regulating airflow.

[0117] When the central processing unit determines that the working mode variable is equal to 1 and the body surface temperature value exceeds the maximum safe body temperature threshold, it determines that the current worker is in an overheated state. The central processing unit immediately activates the second forced intervention program, forcibly resetting the final execution instruction to zero, so that the workstation-level electromagnetic regulating valve or micro electromagnetic valve is completely closed, cutting off the output of the hot air regulating airflow to prevent local burns.

[0118] In all safe temperature conditions except for the two aforementioned out-of-limit abnormal states, the central processing unit determines that the current state is within the human body's thermal safety range and directly determines the composite opening control instruction calculated in step S4 as the final execution instruction output. The formula for calculating the final execution instruction is as follows:

[0119] ;

[0120] In the formula: Indicates the final instruction to be executed; This represents a composite opening control command in the time domain; This represents the operating mode variable for Central Unit 1; This represents the real-time collected body surface temperature value; Indicates the minimum safe body temperature threshold; This indicates the highest safe body temperature threshold.

[0121] After determining the output value using a piecewise function formula, the central processing unit converts the final execution instruction into a pulse width modulation (PWM) signal. This PWM signal is transmitted via the control output terminal block and control wires to the electromagnetic drive coil terminal of the station-level electromagnetic regulating valve or the signal control terminal of the miniature solenoid valve, driving the valve core to displace and regulating the airflow output from the main air supply duct 4. This achieves distributed micro-orifice temperature control while ensuring the safety of personnel at the workstation.

[0122] S6. The central processing unit (CPU) integrates a pulse width modulation (PWM) generator, which transmits the final execution instruction to the PWM generator. The PWM generator linearly maps the numerical value into a duty cycle parameter, generating a PWM signal with a duty cycle ranging from 0% to 100%. When the final execution instruction is a full-scale value, the PWM generator outputs a PWM signal with a 100% duty cycle; when the final execution instruction is zero, the PWM generator outputs a PWM signal with a 0% duty cycle.

[0123] The generated pulse width modulation signal is applied to the control wires via the control output terminal block. The control wires then transmit the pulse width modulation signal to the electromagnetic drive coil terminals or the signal control terminals of the miniature solenoid valve. The valve core of the station-level electromagnetic regulating valve or the valve core of the miniature solenoid valve generates a mechanical displacement based on the duty cycle of the received pulse width modulation signal, thereby regulating the flow cross-sectional area of ​​the airflow inside the main air supply duct 4.

[0124] The change in the flow cross-sectional area directly alters the flow rate of the regulated airflow into the internal cavity of the spray panel 16 or the internal cavity of the ventilated industrial seat. This change in flow rate alters the velocity of the regulated airflow ejected from the micro-holes 17. The regulated airflow with the changed velocity acts on the body surface of the worker, causing a reverse change in body surface temperature data. The body surface temperature sensor captures the changed body surface temperature data in real time and converts it into a new body surface temperature value, which is then input into the AI ​​main controller to achieve electromechanical closed-loop control.

[0125] This invention achieves intelligent control of micro-hole airflow by combining multi-source sensing with an AI main controller: it automatically blows air when a person enters and automatically shuts off the airflow when the person leaves; it can also automatically control the airflow as needed. When the sensing probe (body surface temperature sensor) detects an increase in body temperature, it automatically opens the valve to increase the airflow, and when the body temperature drops to a comfortable level, it automatically closes the valve to reduce the airflow, thus balancing the safety and comfort of personnel at independent workstations with the energy-saving benefits of factory micro-environment control.

Claims

1. A distributed micro-orifice injection temperature control system for factory environments, comprising a central unit (1), main and secondary piping networks, actuators, and terminal equipment, characterized in that, The central unit (1) is located in the fluid source area. The main and secondary pipelines include a main air supply pipe (4) and multiple branch hoses (6). The main air supply pipe (4) is fixed at the air outlet pipe (2) of the central unit (1). The main air supply pipe (4) has an air outlet hole, and a T-joint (7) is fixed at the air outlet hole. The branch hose (6) is sleeved on the tee connector (7) and locked by the clamp fastener (8). The actuating component includes a station-level electromagnetic regulating valve, which is connected in series at the end of the branch hose (6). The branch hose (6) is connected to the air inlet of the station-level electromagnetic regulating valve. The outlet of the station-level electromagnetic regulating valve is equipped with a female quick-connect connector (9), and the terminal equipment is equipped with a male quick-connect connector (10). The terminal equipment is connected to the female quick-connect connector (9) through the male quick-connect connector (10). The central unit (1), the main and secondary pipelines, the actuator and the terminal equipment are connected in series.

2. The distributed micro-orifice jet temperature control system for factory environments according to claim 1, characterized in that, The central unit (1) has a first flange (3) installed on the edge of the air outlet pipe (2) and a second flange (5) installed on the edge of the air inlet end of the main air supply pipe (4). The first flange (3) and the second flange (5) are fastened together by bolts and nuts. The main air supply duct (4) is made of aluminum foil flexible tubing. The outer circumference of the main air supply duct (4) is covered with a heat insulation layer, and an aluminum foil moisture-proof film is pasted on the outer surface of the heat insulation layer.

3. The distributed micro-orifice jet temperature control system for factory environments according to claim 1, characterized in that, The female quick-connect connector (9) has an internal cavity, and a leak-proof one-way valve is arranged in the cavity. The leak-proof one-way valve includes a sealing valve seat, a valve core and a return spring. The sealing valve seat is fixedly disposed on the inner wall of the receiving cavity. An airflow channel is provided at the center of the sealing valve seat. The valve core is disposed downstream of the sealing valve seat. One end of the return spring abuts against the bottom surface of the receiving cavity, and the other end of the return spring abuts against the rear end face of the valve core.

4. The distributed micro-orifice jet temperature control system for factory environments according to claim 1, characterized in that, The terminal device is specifically a workstation terminal, which is equipped with the male quick-connect connector (10), terminal base (11), hollow column, universal fluid joint and spray panel (16). The male quick-connect connector (10) is fixedly installed on the side of the terminal base (11). The hollow column is welded and fixed on the upper surface of the terminal base (11). The hollow column is composed of an outer tube (12) and an inner tube (13). The bottom end of the outer tube (12) is fixedly connected to the terminal base (11).

5. The distributed micro-orifice jet temperature control system for factory environments according to claim 4, characterized in that, The top end of the outer tube (12) is threaded with a telescopic locking mechanism (14), which consists of a locking nut and a conical clamping ring. The inner tube (13) is vertically nested in the internal cavity of the outer tube (12).

6. The distributed micro-orifice jet temperature control system for factory environments according to claim 5, characterized in that, The top end of the inner tube (13) is connected to the universal fluid joint, which is specifically a hollow universal ball joint (15). The ball head seat of the hollow universal ball head (15) is fixedly connected to the spray panel (16). The front surface of the spray panel (16) is provided with a plurality of micro holes (17), and the inner wall of each micro hole (17) is formed into a tapered micro nozzle structure that narrows outward.

7. The distributed micro-orifice jet temperature control system for factory environments according to claim 6, characterized in that, The workstation terminal is equipped with a terminal multimodal sensor network, which includes a body surface temperature sensor, a personnel presence sensor, and an ambient temperature sensor.

8. The distributed micro-orifice jet temperature control system for factory environments according to claim 7, characterized in that, The body surface temperature sensor and the personnel presence sensor are fixed at the front edge of the spray panel (16); The ambient temperature sensor is fixedly installed at the center of the back of the spray panel (16) or on the outer side of the hollow column.

9. The distributed micro-orifice jet temperature control system for factory environments according to claim 8, characterized in that, An AI main controller containing wiring terminals is fixedly installed at the lower end of the outer wall of the outer tube (12). Sensor input terminal blocks and control output terminal blocks are arranged on the side of the housing of the AI ​​main controller. A manual control switch is also provided on the AI ​​main controller. The body surface temperature sensor, the personnel presence sensor, and the ambient temperature sensor are respectively connected to low-voltage cables. The low-voltage cables pass through the interior of the hollow universal ball joint (15) and extend into the internal cavity of the outer tube (12). The portion of the low-voltage cable located in the internal cavity of the outer tube (12) forms a spiral spring-shaped extension structure. The end of the low-voltage cable is connected to the input interface of the AI ​​main controller.

10. A control method for a distributed micro-orifice jet temperature control system for use in a factory environment as described in any one of claims 1-9, characterized in that, Includes the following steps: The data acquisition layer initiates synchronous acquisition of multi-source sensor signals. The ambient temperature sensor acquires the background temperature and converts it into an ambient temperature value. The body surface temperature sensor acquires the surface radiation energy and converts it into a body surface temperature value. The personnel presence sensor acquires the Doppler echo signal to calculate the activity intensity value and acquires the state signal to obtain the presence state Boolean value. The outer ring calculation layer extracts the ambient temperature value and the activity intensity value, and calculates the target body surface temperature value by combining the reference body surface temperature constant, the ambient temperature compensation coefficient and the activity intensity compensation coefficient. The inner loop control layer extracts the target body surface temperature value and the real-time acquired body surface temperature value, subtracts the real-time acquired body surface temperature value from the target body surface temperature value to obtain the body surface temperature deviation value, and derives the basic solenoid valve opening command. The central processing unit of the AI ​​main controller monitors the numerical change of the existence state Boolean value in real time. When the existence state Boolean value changes from true to false, it starts an internal timer and accumulates the duration of the unattended state. Based on the existence state Boolean value and the duration of the unattended state, it switches the basic solenoid valve opening command to a composite opening control command. The preset delay threshold is set within the parameter range of 30 to 60 seconds. A bottom-line safety verification and forced output intervention strategy based on working condition mode is established. The determination is made based on the working mode variable, the minimum safe body temperature threshold, the maximum safe body temperature threshold and the real-time acquired body surface temperature value. The composite opening control command is modified into the final execution command. The minimum safe body temperature threshold is set to 32℃ and the maximum safe body temperature threshold is set to 38℃. The final execution command is converted into a pulse width modulation signal by a pulse width modulation generator, which is then transmitted to the corresponding station-level electromagnetic regulating valve to adjust the flow cross-sectional area.

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