Air conditioning system

Abstract

The invention relates to the technical field of building environments, and discloses an air conditioning system which comprises a main machine, a controller, a first water supply channel, a second water supply channel, a first water return channel and a first flow adjusting valve. The input end of the first flow regulating valve communicates with the first water return channel and the first water supply channel, the output end of the first flow regulating valve communicates with the second water supply channel, and the controller is connected with the first flow regulating valve; wherein the first water supply channel is used for providing water at a first temperature; the second water supply channel is used for providing water at a second temperature; the first water return channel is used for returning water at the third temperature. By optimizing the structure and the function module of the host, an exogenous water mixing center is canceled, and the water mixing generation and treatment functions are integrated in the host, so that the water mixing is cyclically treated in the host, the system architecture is simplified, the energy consumption efficiency is effectively improved, the equipment operation cost and the maintenance difficulty are reduced, and the operation efficiency is improved. And the system stability and the space utilization rate are improved.

Description

Technical Field

[0001] The present application belongs to the field of building environment technology, and specifically relates to an air conditioning system. Background Art

[0002] In air conditioning systems, water mixing technology is often used to precisely adjust the supply water temperature to meet varying operating conditions. The core principle of water mixing is to blend water of different temperatures in a specific ratio to achieve the desired output water temperature, thereby improving system flexibility and energy efficiency. For example, during partial load operation, water mixing can prevent frequent startup and shutdown of the main unit or excessive cooling / heating, reducing equipment wear and energy waste. At present, the mainstream of the industry adopts the exogenous water mixing solution, that is, configuring an independent water mixing center equipment, connecting it with the air-conditioning host and terminal device through components such as water pumps, valves, and heat exchangers to form a circulation loop.

[0003] However, this solution has significant technical bottlenecks: First, the energy efficiency is low. Independent water mixing equipment requires additional electricity to drive water circulation, and long-distance pipelines lead to increased resistance along the way and serious heat loss. The overall operating energy consumption can account for 15%-20% of the total system energy consumption; second, it occupies too much space. Independent water mixing centers need to be equipped with dedicated computer rooms to install equipment and layout pipelines, especially in space-constrained scenarios such as urban commercial complexes and data centers, which takes up a lot of valuable building area; third, the system is highly complex. The numerous connecting pipes, valves and control nodes not only significantly increase the initial construction cost, but also lead to an exponential increase in maintenance difficulty. Troubleshooting is time-consuming and labor-intensive. Damage to any component may trigger a chain reaction of system failures, seriously affecting the stability of energy supply. Summary of the Invention

[0004] In order to address the deficiencies of the aforementioned prior art, the present application provides an air-conditioning system that eliminates the exogenous water mixing center by optimizing the host structure and functional modules, and integrates the water mixing generation and processing functions inside the host, so that the mixed water can be circulated and processed within the host, thereby simplifying the system architecture, effectively improving energy efficiency, reducing equipment operating costs and maintenance difficulty, and improving system stability and space utilization.

[0005] The technical effects to be achieved by this application are achieved through the following aspects: The present application provides an air conditioning system, comprising a main unit, a fan connected to the main unit, and a radiation pipe. The main unit includes a controller, a first water supply channel connected to the second water supply end of the fan, a second water supply channel connected to the first water supply end of the radiation pipe, a first return water channel connected to the first return water end of the radiation pipe, and a first flow regulating valve. The input end of the first flow regulating valve is respectively connected to the first return water channel and the first water supply channel, and the output end of the first flow regulating valve is connected to the second water supply channel. The controller is electrically connected to the first flow regulating valve. Among them, the first water supply channel is used to provide water at a first temperature; the second water supply channel is used to provide water at a second temperature; the first return water channel is used to return water at a third temperature; the controller is configured to obtain a setting instruction for the second temperature, and control the first flow regulating valve to adjust the water flow of the first water supply channel and the first return water channel according to the setting instruction to mix and form the water flow of the second temperature of the second water supply channel.

[0006] In some implementations, the second water supply channel is provided with a temperature sensor, and the temperature sensor is used to monitor and transmit the current water temperature of the second water supply channel; The controller is specifically used for: Acquire data of the current water temperature of the second water supply channel and the second temperature; Comparing the current water temperature of the second water supply channel with the second temperature data, and obtaining a temperature difference; Based on the temperature difference, the first flow regulating valve is controlled to adjust the water flow of the first water supply channel and the first water return channel until the current water temperature of the second water supply channel is equal to the second temperature.

[0007] In some implementations, the main unit also includes a second return water channel and a plate heat exchanger for connecting to the second return water end of the fan, the outflow ends of the first return water channel and the second return water channel are both connected to the plate heat exchanger, and the second return water channel is connected to the first return water channel.

[0008] In some implementations, the air conditioning system further includes: The radiation pipe is provided with a first water supply end and a first water return end, the first water supply end is communicated with the second water supply channel, and the first water return end is communicated with the first water return channel; The fan is provided with a second water supply end and a second water return end, the second water supply end is communicated with the first water supply channel, and the second water return end is communicated with the second water return channel; and A temperature control component is connected to the controller and is used to switch the operating mode and set target values of indoor temperature and humidity, so that the controller can adjust the temperature of the fan and the radiation duct.

[0009] In some implementations, the air-conditioning system further includes a circulation pump, wherein an input end of the circulation pump is connected to the second water supply channel, and an output end of the circulation pump is connected to the first water supply end.

[0010] In some implementations, the temperature control component includes: A mode switching module is used to switch between at least six operating modes, including: a fan-only cooling mode, a radiant duct cooling mode, a fan-and-radiant duct mixed cooling mode, a fan-only heating mode, a radiant duct heating mode, and a fan-and-radiant duct mixed heating mode; A temperature and humidity control module, used to control the activation of the humidification function or the dehumidification function; and The data processing unit is electrically connected to the mode switching module, the temperature and humidity control module, and the controller. The data processing unit is used to receive input mode instructions and set temperature and humidity target values, generate a control signal based on real-time indoor temperature and humidity data, and transmit the control signal to the controller.

[0011] In some implementations, the temperature control component further includes: A display unit is used to display the current operating mode, the set temperature and humidity target values, the actual indoor temperature and humidity, and the humidification / dehumidification status in real time; and A communication module supports at least one wireless communication protocol and works in conjunction with the controller to enable remote mode switching and temperature and humidity adjustment. Specifically, the wireless communication protocols include Modbus RTU, Wi-Fi, Bluetooth, ZigBee, NB-IoT, and LoRa.

[0012] In some implementations, the temperature and humidity control module is provided with a temperature and humidity detection unit, and the temperature and humidity detection unit is used to monitor the humidity and temperature of the environment in real time; The data processing unit is used for: Acquiring humidity data monitored by the temperature and humidity detection unit; comparing the humidity data with a preset humidity target value; When the humidity data exceeds the preset humidity target value, a dehumidification start instruction is generated.

[0013] In some implementations, the temperature and humidity control module is provided with a temperature and humidity detection unit, and the temperature and humidity detection unit is used to monitor the humidity and temperature of the environment in real time; The controller is used to: Acquiring humidity and temperature data monitored by the temperature and humidity detection unit; calculating a dew point temperature based on the humidity and temperature data; The second temperature is set based on the dew point temperature. The second temperature is equal to the sum of the dew point temperature and a compensation value. The compensation value is 0°C-5°C.

[0014] In some implementations, the air conditioning system further includes a buffer water tank, the input end of the buffer water tank is connected to the first return water end and the second return water end, and the output end of the buffer water tank is connected to the second return water channel.

[0015] In summary, this application has at least the following benefits: The air conditioning system provided by this application integrates a first flow control valve and a controller, and utilizes the water mixing structure of the first return water channel and the first water supply channel to directly adjust the temperature of the second water supply channel, achieving precise temperature control while reducing the need for independent water mixing equipment. This application eliminates the external water mixing center and integrates the water mixing generation and processing functions within the main unit, allowing the water mixing to be circulated and processed within the main unit. This simplifies the system architecture, creates a compact overall structure, effectively improves energy efficiency, reduces equipment operating costs and maintenance difficulties, and enhances system stability and space utilization.

[0016] In addition, in this structure, the host can support the simultaneous output of water flow at two different temperatures without the need for additional temperature distribution equipment. Compared with the traditional single-water temperature host, it can save space and simplify the piping layout while meeting the needs of dehumidification and refrigeration at the same time, reflecting the innovative advantages of equipment integration and diversified functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the air-conditioning system in Example 1 of the present application.

[0018] Figure 2 This is a structural diagram of the air-conditioning system in Example 2 of the present application.

[0019] Figure 3 This is a structural diagram of the temperature control component in Example 2 of the present application.

[0020] Figure 4 This is a structural diagram of the air-conditioning system in Example 3 of the present application.

[0021] Figure 5 This is a structural diagram of the air-conditioning system in Example 4 of the present application.

[0022] Markings in the figure: 1. Main unit, 11. First water supply channel, 12. Second water supply channel, 13. First return water channel, 14. First flow regulating valve, 15. Second return water channel, 16. Controller, 17. Plate heat exchanger, 18. Second flow regulating valve, 19. Electric valve; 2. Radiation pipe, 21. First water supply end, 22. First return water end; 3. Fan, 31. Second water supply end, 32. Second return water end; 4. Temperature control component, 41. Mode switching module, 42. Temperature and humidity control module, 43. Data processing unit, 44. Display unit, 45. Communication module; 5. Buffer water tank; 6. Water pump; 7. Circulation pump. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. The described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] Example 1: Please see the attached Figure 1 The present application proposes an air-conditioning system, comprising a main unit 1, a fan 3 and a radiation pipe 2 connected to the main unit, the main unit 1 comprising a controller 16, a first water supply channel 11 connected to the second water supply end of the fan 3, a second water supply channel 12 connected to the first water supply end of the radiation pipe 2, a first return water channel 13 connected to the first return water end of the radiation pipe 2, and a first flow regulating valve 14; the input end of the first flow regulating valve 14 is respectively connected to the first return water channel 13 and the first water supply channel 11, the output end of the first flow regulating valve 14 is connected to the second water supply channel 12, and the controller 16 is electrically connected to the first flow regulating valve 14.

[0026] Among them, the first water supply channel 11 is used to provide water at a first temperature; the second water supply channel 12 is used to provide water at a second temperature; the first return water channel 13 is used to return water at a third temperature; specifically, in the cooling mode, the water temperature has the relationship of first temperature < second temperature < third temperature, and in the heating mode, the water temperature has the relationship of first temperature > second temperature > third temperature.

[0027] The controller 16 is configured to obtain a setting instruction for the second temperature and control the first flow regulating valve 14 to adjust the water flow of the first water supply channel 11 and the first water return channel 13 according to the setting instruction to mix and form a water flow of the second temperature in the second water supply channel 12.

[0028] The first flow regulating valve 14 is an actuator for mixing water flows of different temperatures and adjusting the output water temperature. Specifically, it can be implemented by a proportional three-way valve, which controls the ratio of the two water inlet flows by changing the valve core opening.

[0029] The radiation pipe 2 can adjust the temperature of different building interfaces such as the top, ground and side, and adapt to various indoor space layouts.

[0030] The controller 16 refers to a control unit with data processing capability, which can be implemented by a microprocessor module and generates valve position control instructions by receiving temperature signals.

[0031] In the air-conditioning system of this embodiment, during operation, when the terminal device requires water supply at a specific temperature, the controller 16 receives a second temperature setting instruction. Based on the temperature gradient between the low-temperature water transported by the first water supply channel 11 and the high-temperature water returned by the first return water channel 13, the controller 16 sends a control signal to the first flow regulating valve 14. The first flow regulating valve 14 adjusts the opening ratio of the two water inlets according to the instruction so that the low-temperature water and the high-temperature return water are mixed as needed. The mixed water flow is transported to the terminal device through the second water supply channel 12, and its actual temperature is continuously monitored and compared with the set value. When a temperature deviation is detected, the controller 16 automatically corrects the opening of the first flow regulating valve 14 until the output water temperature accurately matches the set requirements.

[0032] Specifically, in cooling mode, the first water supply channel 11 is used to provide water flow at 7°C. The first return water channel 13 is used to provide water flow at 24°C. The second temperature of the second water supply channel 12 is set to water flow at 19°C. The opening is dynamically adjusted according to the difference between the target water temperature of 19°C and the actual inlet water temperature, mixing 7°C air-conditioned outlet water and 24°C radiant return water. For example, if the actual inlet water temperature is lower than 19°C, the water flow ratio of the first return water channel 13 will be increased; if it is higher than 19°C, the water flow ratio of the first water supply channel 11 will be increased until the actual inlet water temperature stabilizes at 19°C.

[0033] In heating mode, the first water supply channel 11 is used to provide a water flow at 50°C. The first water return channel 13 is used to provide a water flow at 35°C. The second temperature of the second water supply channel 12 is set to a water flow of 40°C. The opening is dynamically adjusted based on the difference between the target water temperature of 40°C and the actual inlet water temperature, mixing 50°C air-conditioned outlet water with 35°C radiant return water. For example, if the actual inlet water temperature is lower than 40°C, the water flow ratio of the first water supply channel 11 will be increased; if it is higher than 40°C, the water flow ratio of the first return water channel 13 will be increased until the actual inlet water temperature stabilizes at 40°C.

[0034] By mixing two water streams at different temperatures and using temperature differential compensation to achieve precise temperature control, we can avoid the impact of temperature fluctuations from a single water source on the system, ensuring the stability and comfort of radiant cooling and heating. The specific temperature can be flexibly set according to actual conditions and is not limited in this application.

[0035] In this structure, by integrating the first flow regulating valve 14 inside the main unit 1, the pipeline connection relationship is optimized, the waste heat of the return water is directly used for mixing, and the mixing process is compressed inside the main unit 1 to complete the circulation process, which significantly shortens the water flow path and eliminates the equipment configuration of an independent water mixing center. By eliminating independent water mixing equipment, power consumption is reduced, and heat loss is reduced by using short-distance pipelines, energy efficiency is effectively improved. This design integrates the water mixing function into the main unit 1 to avoid occupying additional space, greatly saving equipment installation space, simplifying the system architecture, reducing pipeline connection nodes and control levels, and improving system reliability and maintenance convenience.

[0036] In addition, the air-conditioning system in this solution can supply two water flows of different temperatures at the same time, which is highly practical. There is no noise or wind during the operation of the entire system, and the body feels more comfortable and pleasant.

[0037] In some embodiments, the second water supply channel 12 is provided with a temperature sensor, which is used to monitor and transmit the current water temperature of the second water supply channel 12; wherein, the temperature sensor can be specifically implemented by a thermal resistor, a thermocouple or a digital temperature probe, and its function is to collect temperature data of the mixed water flow in real time and provide a feedback signal for closed-loop control.

[0038] The controller 16 is specifically used for: Acquire data of the current water temperature and the second temperature of the second water supply channel 12; Comparing the current water temperature of the second water supply channel 12 with the second temperature data and obtaining a temperature difference; Based on the temperature difference, the first flow regulating valve 14 is controlled to adjust the water flow of the first water supply channel 11 and the first water return channel 13 until the current water temperature of the second water supply pipe water supply channel 12 is equal to the second temperature.

[0039] Among them, the temperature difference refers to the deviation between the second temperature and the current water temperature of the second water supply channel 12, which can be obtained through arithmetic subtraction or a difference calculation module with filtering processing. Its function is to quantify the degree of deviation between the current mixed water temperature and the target value, and provide a control basis for the regulating valve opening.

[0040] In this embodiment, during the operation of the system, the temperature sensor continuously collects the mixed water temperature output by the second water supply channel 12 and transmits the measured value to the controller 16. The controller 16 compares the received measured water temperature with the preset second temperature in real time and calculates the temperature difference between the two. When it is detected that the temperature difference is not zero, the controller 16 generates a corresponding adjustment instruction to drive the first flow control valve 14 to change the opening ratio of the first water supply channel 11 and the first return water channel 13. For example, when the measured water temperature is lower than the set value, the controller 16 increases the valve opening of the high-temperature return water branch and reduces the opening of the low-temperature water supply branch, thereby increasing the mixed water temperature by increasing the high-temperature water flow ratio. This adjustment process continues until the measured water temperature fed back by the temperature sensor is consistent with the set temperature, forming a closed-loop control circuit.

[0041] This closed-loop feedback control mechanism automatically compensates for water temperature deviations caused by environmental interference, achieving precise dynamic control of mixed water temperature and eliminating energy waste caused by temperature deviations. This eliminates the complex control nodes in independent water mixing equipment, simplifies the system architecture, and correspondingly improves the stability and reliability of system operation.

[0042] In some embodiments, the main unit 1 also includes a second return water channel 15 and a plate heat exchanger 17 for connecting to the second return water end of the fan 3, the outflow ends of the first return water channel 13 and the second return water channel 15 are both connected to the plate heat exchanger 17, and the second return water channel 15 is connected to the first return water channel 13. The second water return channel 15 allows the excess water that does not participate in the terminal heat exchange to flow directly back to the plate heat exchanger 17, which not only provides a channel for the recycling of water flow, but also ensures the balance and stability of water flow pressure.

[0043] The plate heat exchanger 17 is a device for achieving heat exchange between water and refrigerant, and its function is to perform secondary thermal treatment on the return water flow to improve energy utilization efficiency.

[0044] During the water mixing and adjustment process of the air-conditioning system of this embodiment, some high-temperature return water does not fully participate in the water mixing and forms excess water flow. This excess water flows directly into the plate heat exchanger 17 through the second return water channel 15, exchanges heat with the refrigerant, and then re-enters the circulation process. Due to the parallel design of the second return water channel 15 and the first return water channel 13, the water flow can be returned and reprocessed without passing through an external independent water mixing device, effectively reducing the dependence on pipeline connection nodes and external components. The secondary thermal treatment of the return water by the plate heat exchanger 17 adjusts the water temperature so that it can directly participate in the next cycle, avoiding the problem of the return water in the traditional solution requiring additional mixing treatment due to temperature instability, and realizing the efficient reuse of the return water.

[0045] In this structure, through the combined design of the second return water channel 15 and the plate heat exchanger 17, excess water flow can be circulated and processed within the system, reducing dependence on external components and reducing pipeline connection nodes. At the same time, the secondary thermal treatment of the plate heat exchanger 17 improves energy utilization efficiency, achieving a simple and compact system structure, enhanced operational stability, and low operating energy consumption.

[0046] In some other embodiments, the first flow regulating valve 14 is a proportional three-way valve.

[0047] A proportional three-way valve is a control valve with three fluid channels that distributes flow proportionally. This valve is typically implemented using an electric three-way valve body with linear flow regulation characteristics. The displacement of the internal valve core is linearly related to the opening, enabling precise proportional control. This proportional three-way valve integrates the mixing function of high-temperature and low-temperature water, replacing the water pump and heat exchanger structure in traditional water mixing equipment. Specifically, the three ports are the high-temperature water inlet, the low-temperature water inlet, and the mixed water outlet. These ports are connected to the pipeline using flanges or threaded connections. Water temperature is controlled by adjusting the ratio of the cross-sectional areas of the two inlets.

[0048] In this embodiment, when in the single radiation cooling mode or the mixed cooling mode, the proportional three-way valve will switch to an initial opening of 5%, and accurately control the flow in the initial startup, that is, 5% of the water flow in the first water supply channel 11 + 95% of the water flow in the first return water channel 13. Compared with the initial opening of 50%, it can prevent a large amount of low-temperature water from entering the radiation pipe and avoid the occurrence of condensation. At the same time, the controller 16 will automatically calculate the second temperature, and dynamically adjust the proportional three-way valve opening based on the feedback of the actual radiation inlet water temperature displayed by the radiation cooling temperature sensor, so that the radiation cooling inlet water temperature quickly reaches the second temperature.

[0049] To further explain, during the water mixing phase, controller 16 sends a control signal to the proportional three-way valve to activate the valve core. To increase the mixed water temperature, the valve core shifts toward the high-temperature return channel, increasing the cross-sectional area of the high-temperature return water while reducing the cross-sectional area of the low-temperature supply channel, thereby increasing the proportion of high-temperature return water. To lower the water temperature, the valve core performs the reverse adjustment.

[0050] The proportional three-way valve's linear flow characteristics form a closed-loop control system with controller 16, enabling the mixed water temperature to be adjusted with an accuracy of ±0.5°C and a response time of less than 10 seconds, effectively improving both response speed and water temperature control accuracy. Through its integrated mechanical design, the proportional three-way valve integrates the functions of the traditional, independently-installed mixing tank, circulation pump, and multi-stage valve within a single valve body, eliminating the pump power unit and heat exchanger chamber required for separate mixing equipment. This significantly simplifies the system structure, resulting in a compact and simple design.

[0051] It should be noted that in the mixed cooling mode, the actual opening of the proportional three-way valve is obtained by the formula: En=(En-1)+[KP(Tdj-Tdc1)+KD(Tdj-Tdj-1)+KI(Tdj-Tdj-4)].

[0052] In the mixed heating mode, the actual opening of the proportional three-way valve is obtained by the formula: En=(En-1)+[KP(Tdc1-Tdj)+KD(Tdj-1-Tdj)+KI(Tdj-4-Tdj)].

[0053] Where En is the actual opening of the proportional valve. En-1 is the opening of the proportional valve in the previous cycle. Tdj is the actual radiant inlet water temperature. Tdc1 is the set target radiant inlet water temperature. Tdj-1 is the actual radiant inlet water temperature in the previous cycle. Tdj-4 is the actual radiant inlet water temperature four cycles ago. KP is the proportional valve control proportional coefficient. KD is the proportional valve control differential coefficient. KI is the proportional valve control integral coefficient. The parameters of KP, KD, and KI can be flexibly adjusted according to actual conditions.

[0054] By adopting the joint control of proportional terms, differential terms and integral terms, the system performance can be effectively optimized, the anti-interference ability can be improved, the temperature difference fluctuation can be reduced, and the stability of the regulation accuracy can be ensured.

[0055] Example 2: The difference between this embodiment and embodiment 1 is that, see Figure 2 , the air conditioning system of this embodiment further includes a temperature control component 4.

[0056] Radiant pipe 2 is provided with a first water supply end 21 and a first water return end 22. The first water supply end 21 is connected to the second water supply channel 12, and the first water return end 22 is connected to the first water return channel 13. Radiant pipe 2 is a terminal device that implements radiant heat transfer from the top, ground, or side surfaces through water circulation. Specifically, it can be implemented using a coil structure pre-buried within the building. Its water inlet is connected to the second water supply channel 12 to receive the mixed water at the second temperature.

[0057] The fan 3 is provided with a second water supply end 31 and a second water return end 32. The second water supply end 31 is connected to the first water supply channel 11, and the second water return end 32 is connected to the second water return channel 15. The fan 3 is a terminal device that achieves temperature regulation through air convection. Specifically, it can be implemented as an indoor unit with a fin heat exchanger and a blower. Its water inlet end is directly connected to the first water supply channel 11 to obtain unmixed water at the first temperature.

[0058] Temperature control unit 4 is connected to controller 16 and is used to switch operating modes and set target indoor temperature and humidity values, enabling controller 16 to adjust the water temperature of fan 3 and radiant pipe 2. Temperature control unit 4 is a control device that integrates mode switching and data processing functions. Specifically, it can be implemented as an intelligent panel with a built-in microprocessor and communication module 45. It works in conjunction with controller 16 to achieve coordinated regulation of terminal devices.

[0059] In the air conditioning system of this embodiment, the first water supply end 21 of the radiant pipe 2 receives the mixed water flow at the second temperature from the second water supply channel 12, transferring heat or cold to the radiant layer through the pipe circulation. The first water return end 22 divides the return water into the first return water channel 13 and the second return water channel 15. The second water supply end 31 of the fan 3 is directly connected to the first water supply channel 11, using the first temperature water flow for air heat exchange. The second water return end 32 returns the water to the second return water channel 15, forming a circulation path. The temperature control component 4 generates a control signal by receiving indoor temperature and humidity data. The controller 16 synchronously adjusts the water supply temperature of the radiant pipe 2 and the fan 3, meeting the differentiated water temperature requirements of different terminal devices without relying on external water mixing equipment. The radiant pipe 2 and the fan 3 are connected to the main water supply channel and the return water channel through independent pipelines, eliminating the redundant piping required in traditional water mixing centers.

[0060] By integrating the dual-end structure of the radiant pipe 2 and fan 3, and utilizing a direct connection between the main water supply channel and the return water channel to replace an external water mixing center, not only does this eliminate the additional energy consumption and piping losses associated with independent water mixing equipment, but it also reduces the space required for equipment installation. The radiant pipe 2 and fan 3 utilize a split-circuit water supply design, enabling simultaneous output of two water temperatures, providing enhanced practicality and improving comfort. Furthermore, the temperature control component 4 and controller 16 work together to achieve centralized multi-end temperature control, eliminating the need for additional water mixing equipment to meet diverse temperature requirements and significantly reducing system construction and maintenance costs.

[0061] In some embodiments, the air conditioning system further includes a circulation pump 7, the input end of which is connected to the second water supply channel 12, and the output end of which is connected to the first water supply channel 21. This arrangement allows water to flow from the second water supply channel 12 to the first water supply channel 21, and then return to the first water return channel 13 from the first water return channel 22, thereby achieving internal water circulation and improving energy utilization, while also achieving the advantages of energy saving and a simple and compact structure.

[0062] Please see the attached Figure 3 In some embodiments, the temperature control component 4 includes a mode switching module 41 , a temperature and humidity control module 42 , and a data processing unit 43 .

[0063] The mode switching module 41 is used to realize switching of at least 6 operating modes, including: cooling mode with only fan 3, cooling mode with only radiation pipe 2, mixed cooling mode with fan 3 and radiation pipe 2, heating mode with only fan 3, heating mode with only radiation pipe 2, and mixed heating mode with fan 3 and radiation pipe 2.

[0064] The temperature and humidity control module 42 is used to control the start of the humidification function or the dehumidification function. Specifically, it can be implemented by using a humidity sensor and a solenoid valve linkage device, actively adjusting the ambient humidity parameters through a closed-loop feedback mechanism, breaking through the limitations of traditional single-variable temperature control.

[0065] The data processing unit 43 is electrically connected to the mode switching module 41, the temperature and humidity control module 42, and the controller 16. The data processing unit 43 is used to receive input mode instructions and set temperature and humidity target values, and generate a control signal based on the real-time indoor temperature and humidity data, and transmit the control signal to the controller 16.

[0066] In this embodiment, after the user sets the target temperature and humidity parameters, data processing unit 43 receives the instruction and continuously collects indoor temperature and humidity data. Mode switching module 41 automatically selects an operating mode based on the load type or in response to user instructions. For example, in high-humidity summer environments, fan 3 and radiant duct 2 are activated in a mixed cooling mode, using fan 3 to assist in dehumidification.

[0067] Specifically, in the single fan cooling mode, the first flow regulating valve 14 is closed and the second water supply channel 12 does not supply water; the first water supply channel 11 is opened by the solenoid valve to provide cooling water to the second water supply end 31 of the fan 3.

[0068] In the cooling mode of the single radiation pipe 2, the connecting input end between the first flow regulating valve 14 and the first return water channel 13 is closed, and the other connecting points are opened. The first water supply channel 11 is directly adjusted to water of the second temperature through the controller, and the second water supply channel 12 is provided with water flow of the second temperature, thereby ensuring that the radiation pipe achieves cooling.

[0069] In mixed cooling mode with fan 3 and radiant pipe 2, first water supply channel 11 is opened via a solenoid valve, providing cooling water to second water supply port 31 of fan 3. Simultaneously, first flow control valve 14 is also opened, and the first water supply channel 11 and first return water channel 13 are combined via first flow control valve 14 to form the water flow in second water supply channel 12, providing water at the second temperature to the radiant pipe, achieving mixed cooling. The same principle applies to heating mode and will not be elaborated here.

[0070] Through the above settings, the multi-mode collaborative mechanism enables the air-conditioning system to flexibly adapt to the temperature and humidity requirements of different seasons and usage scenarios, improving ease of use and user comfort.

[0071] In some embodiments, the temperature control component 4 further includes a display unit 44 and a communication module 45 .

[0072] Display unit 44 is used to display the current operating mode, set temperature and humidity target values, actual indoor temperature and humidity, and humidification / dehumidification status in real time. Display unit 44 can be implemented as a touch screen or liquid crystal display, and is used to convert the operating mode, temperature and humidity set values, actual temperature and humidity, and humidification / dehumidification status into visual information, allowing the user to directly observe system dynamics.

[0073] The communication module 45 supports at least one wireless communication protocol and works in conjunction with the controller 16 to enable remote mode switching and temperature and humidity adjustment. Specifically, wireless communication protocols include Modbus RTU, Wi-Fi, Bluetooth, ZigBee, NB-IoT, and LoRa. Preferably, a circuit board with an integrated multi-protocol chip is used to establish a data channel between the controller 16 and an external terminal, enabling remote command transmission and status feedback.

[0074] In this embodiment, the display unit 44 continuously collects mode status signals, temperature and humidity sensor data, and dew point temperature calculation results, and synchronously updates the interface display content in digital or graphical form. When the user performs local operations, the display unit 44 maps the changes in the set parameters to the interface in real time to avoid operational errors caused by information delays. The communication module 45 parses the instructions from the mobile terminal or cloud platform through the built-in protocol stack, and sends the parsed control signal to the controller 16, while feeding back the current status data of the system to the terminal device. For example, under a Wi-Fi connection, the user can adjust the target temperature of the fan 3 through the mobile phone application. At this time, the communication module 45 forwards the instruction to the controller 16, triggering the opening adjustment of the first flow control valve 14, and at the same time transmitting the updated actual water temperature back to the application interface.

[0075] Through the above-mentioned integrated multi-protocol communication module 45, the system can adapt to different IoT environments and realize wireless signal transmission. It does not require the spatial wiring design required for wired connection, and is easy to install. In addition, this setting supports the remote terminal to adjust the temperature, humidity and operating mode, reducing the control lag caused by physical location restrictions. Secondly, the system can select the optimal communication method according to the requirements of different scenarios. For example, in low-power scenarios, the NB-IoT protocol is enabled to extend the battery life of the device, and in scenarios with high real-time requirements, the Wi-Fi protocol is enabled to ensure a quick response to instructions, thereby improving control reliability.

[0076] In addition, the display unit 44 enables the user to intuitively obtain the complete operating parameters of the air-conditioning system through the local interface, thereby avoiding erroneous operations caused by information opacity.

[0077] In some embodiments, the temperature and humidity control module 42 is provided with a temperature and humidity detection unit, which is used to monitor the humidity and temperature of the environment in real time. Preferably, the temperature and humidity detection unit is implemented using a digital temperature and humidity sensor, such as an SHT series or DHT series sensor, which periodically collects environmental parameters to provide a data basis for humidity control.

[0078] The data processing unit 43 is used to obtain the humidity data monitored by the temperature and humidity detection unit; compare the humidity data with a preset humidity target value; and generate a dehumidification start instruction when the humidity data exceeds the preset humidity target value.

[0079] Among them, the preset humidity target value refers to the pre-set upper limit of the allowable ambient humidity, which can be set through the user interface or remote configuration tool. For example, it is set to 58% relative humidity to determine whether to trigger the dehumidification operation.

[0080] The dehumidification start instruction refers to a signal that controls the operation of the dehumidification equipment, which can be sent to the controller 16 through a communication protocol. The controller 16 adjusts the water temperature of the host and starts the air coil unit through the temperature control component 4 to perform the dehumidification operation.

[0081] The automatic dehumidification process in this embodiment is as follows: humidity data is continuously collected by the temperature and humidity detection unit and transmitted to the data processing unit 43. The preset humidity target value is loaded into the comparison logic of the data processing unit 43. When the real-time humidity data exceeds the preset target value, the comparison logic generates a trigger signal, and the dehumidification start instruction is sent to the controller 16. After receiving the control signal, the controller 16 adjusts the flow valve opening, adjusts the water supply temperature of the host 1 and the operating status of the terminal equipment, and achieves precise control of the hot and cold water mixing ratio. During this process, the data processing unit 43 periodically performs data comparison to ensure the real-time response of the humidity control.

[0082] Through the above settings, the air conditioning system can immediately activate the dehumidification function when the ambient humidity is too high, effectively avoiding equipment corrosion or indoor humidity problems caused by condensation accumulation, further ensuring the comfort of the indoor space, and at the same time reducing the energy consumption caused by redundant operation of the dehumidification equipment.

[0083] In some embodiments, the temperature and humidity control module 42 includes a temperature and humidity detection unit for real-time monitoring of the ambient humidity and temperature. The controller 16 is configured to obtain humidity and temperature data monitored by the temperature and humidity detection unit; calculate the dew point temperature based on the humidity and temperature data; and set a second temperature based on the dew point temperature, where the second temperature is equal to the sum of the dew point temperature and a compensation value, with the compensation value ranging from 0°C to 5°C.

[0084] The dew point temperature is the critical temperature at which water vapor in the air reaches saturation. It can be calculated using the Magnus formula or a simplified empirical formula, such as one based on ambient temperature and relative humidity data and substituted into a preset algorithm model. This parameter is used to determine the condensation risk threshold.

[0085] The 0°C-5°C safety temperature differential is set based on actual needs. It ensures the outlet water temperature is above the dew point, preventing condensation on the radiating surface. Specifically, in radiant cooling mode alone, the compensation value is a variable related to the dew point temperature. Its specific value varies depending on the dew point temperature to ensure that main unit 1 matches the outlet water temperature appropriately above the dew point, effectively preventing condensation and achieving good radiant cooling results. For example, at low dew point temperatures, the compensation value may be relatively large; at higher dew point temperatures, the compensation value is correspondingly smaller. Specifically, when the dew point temperature is less than 10°C, the compensation value is set to 5°C; when the dew point temperature is between 10°C and 13°C, the compensation value is set to 3°C; when the dew point temperature is between 13°C and 16°C, the compensation value is set to 2°C; when the dew point temperature is between 16°C and 24°C, the compensation value is set to 1°C; and when the dew point temperature is above 24°C, the compensation value is set to 0.5°C. This setting allows for quick and accurate adjustment to the second temperature, preventing condensation on the radiating surface. The temperature and humidity detection unit in this embodiment continuously collects indoor temperature and humidity data and transmits it to controller 16. Controller 16 calculates the dew point temperature based on the current ambient temperature and relative humidity, generating a dynamic temperature control benchmark. As the dew point temperature rises with the ambient humidity, controller 16 sets the second temperature to a value between 0°C and 5°C above the current dew point, ensuring that the water supply temperature remains above the critical point of condensation.

[0086] This process achieves real-time matching of water supply temperature and environmental conditions through a closed-loop feedback mechanism, realizes precise control of the surface temperature of the terminal equipment, effectively avoids moisture caused by condensation in the radiation pipe 2 and damage to the floor, improves user comfort, and ensures safe operation of the system.

[0087] Example 3: The difference between this embodiment and embodiment 2 is that, see Figure 4 The air conditioning system in this embodiment also includes a buffer water tank 5, the input end of the buffer water tank 5 is connected to the first return water end 22 and the second return water end 32, and the output end of the buffer water tank 5 is connected to the second return water channel 15.

[0088] The buffer water tank 5 refers to a container device for receiving and temporarily storing the end return water, and is preferably made of a sealed box made of stainless steel or engineering plastics, which plays the role of collecting mixed water flow and stabilizing the system pressure.

[0089] In this embodiment of the air conditioning system, the return water from the radiant pipes 2 and the fan 3 enters the buffer water tank 5 through their respective outlets. There, the water naturally mixes within the tank, forming a relatively uniform temperature flow. The physical buffering effect of the buffer water tank 5's internal volume mitigates the impact of incoming water of varying flow rates or temperatures, preventing pressure fluctuations in the pipelines caused by sudden changes in flow rate. After a brief retention within the tank, the mixed water flows smoothly through the outlet and into the second return channel 15, where it then enters the plate heat exchanger 17, completing the cycle.

[0090] The buffer tank 5 forms an internal return water buffer structure, eliminating the need for independent water mixing equipment and its associated piping. This simplifies the multi-terminal return water path into a centralized buffer system, effectively reducing the complexity of piping design. Furthermore, this ensures stable water pressure balance during water recycling, further ensuring stable water temperature regulation.

[0091] In some other embodiments, the host 1 further includes a water pump 6, the input end of the water pump 6 being connected to the output end of the buffer water tank 5, and the output end of the water pump 6 being connected to the plate heat exchanger 17. Preferably, the water pump 6 is a shielded water pump 6, which is used to push the water in the buffer water tank 5 through the plate heat exchanger 17 to form a closed loop.

[0092] The configuration of water pump 6 overcomes resistance in the pipeline and the flow path within plate heat exchanger 17, ensuring stable water flow at the designed pressure. This ensures sufficient contact between the hot and cold fluids in plate heat exchanger 17 and maximizes heat exchange efficiency. Furthermore, water pump 6 ensures relatively stable water circulation, avoids local overheating or overcooling, and effectively improves system stability.

[0093] Example 4: The difference between this embodiment and embodiment 1 is that, see Figure 5 The air conditioning system of this embodiment further includes a second flow regulating valve 18 . The input end of the second flow regulating valve 18 is connected to the first return water channel 13 and the second return water channel 15 , respectively. The output end of the second flow regulating valve 18 is connected to the second water supply channel 12 . An electric valve 19 is connected between the first water supply channel 11 and the second water supply channel 12 .

[0094] In the air conditioning system of this embodiment, during hybrid cooling operation, the connection between first flow regulating valve 14 and first water supply channel 11 is closed, and electric valve 19 is closed. One water flow path flows from first water supply channel 11 through second water supply port 31 of fan 3, and flows through second water return port 32 to second water return channel 15, achieving cooling by fan 3.

[0095] Another water flow passes through the second flow regulating valve 18 to mix the first return water channel 13 and the second return water channel 15 to form a water flow at a second temperature. Specifically, the water flow of the first return water channel 13 enters through one input end of the second flow regulating valve 18, and the water flow of the second return water channel 15 enters through the other input end of the second flow regulating valve 18. The controller 16 receives the second temperature setting instruction and sends a control signal to the second flow regulating valve 18. The second flow regulating valve 18 adjusts the opening ratio of the two water inlets according to the instruction, so that the low-temperature water in the second return water channel 15 and the high-temperature return water in the first return water channel 13 are mixed as needed. The mixed water flow is transported to the radiation pipe 2 through the second water supply channel 12, and its actual temperature is continuously monitored and compared with the set value. When a temperature deviation is detected, the controller 16 automatically corrects the opening of the second flow regulating valve 18 until the output water temperature accurately matches the set requirements. For example, if the first water supply channel 11 is configured to provide water at 7°C, the water temperature in the second return water channel is approximately 12°C; if the second water supply channel 12 is configured to provide water at 20°C, the water temperature in the first return water channel 13 is approximately 25°C. When the current water temperature in the second water supply channel 12 is higher than the set temperature of 20°C, the second flow regulating valve 18 increases the flow rate of the water flowing through the second return water channel, increasing the flow rate of low-temperature water, or decreases the flow rate of the water flowing through the first return water channel, reducing the flow rate of high-temperature water. When the current water temperature in the second water supply channel 12 is lower than the set temperature of 20°C, the valve opening of the second flow regulating valve 18 for the water flowing through the second return water channel is reduced, thereby reducing the flow rate of low-temperature water, or the valve opening of the second flow regulating valve 18 for the water flowing through the first return water channel is increased, thereby increasing the flow rate of high-temperature water, so that the current water temperature in the second water supply channel 12 is equal to the second temperature.

[0096] In the single fan cooling mode, the connection between the first flow regulating valve 14 and the first return water channel 13 is closed, the connection between the second flow regulating valve 18 and the second return water channel 15 is closed, the electric valve 19 is closed, and the water flows from the first water supply channel 11 to the second water supply end 31 of the fan 3, and then flows out from the second return water end 32 of the fan 3 to the second return water channel 15, thereby realizing the cooling of the fan 3.

[0097] In the cooling mode of the independent radiant pipe 2, the connection between the first flow regulating valve 14 and the first return water channel 13 is closed, the connection between the second flow regulating valve 18 and the second return water channel 15 is closed, and the electric valve 19 is opened. Water flows from the first water supply channel 11 through the electric valve 19 to the first water supply end 21 of the radiant pipe 2, flows through the radiant pipe 2, and then flows out from the first return water end 22 of the radiant pipe 2 to the first return water channel 13. Then, it is converged through the second return water channel to the plate heat exchanger 17 for internal circulation, thereby achieving cooling of the radiant pipe 2. The above-mentioned water mixing setting can automatically compensate for water temperature deviations caused by environmental interference factors, achieve precise dynamic control of the mixed water temperature, and eliminate energy waste caused by temperature deviation. At the same time, it can achieve internal water circulation, energy saving and environmental protection, effectively improve energy utilization, and eliminate the complex control nodes in the independent water mixing equipment, simplifying the system structure and correspondingly improving the stability and reliability of the system operation.

[0098] Furthermore, an additional water mixing structure is provided based on Example 1, allowing flexible selection of either the first flow control valve 14 or the second flow control valve 18 depending on the specific situation, thus enhancing practicality. Furthermore, the air conditioning system has two water mixing systems, providing a backup function. This allows maintenance or component replacement without affecting the operation of the air conditioning system, thus ensuring operational continuity.

[0099] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0100] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0101] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0102] In this application, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0103] Although the present application is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included in the spirit and scope of the appended claims.

Claims

1. An air conditioning system comprising a main unit (1), a fan (3) and a radiation duct (2) connected to the main unit, characterized in that: The host (1) comprises a controller (16), a first water supply channel (11) for connecting to the second water supply end of the fan (3), a second water supply channel (12) for connecting to the first water supply end of the radiation pipe (2), a first return water channel (13) for connecting to the first return water end of the radiation pipe (2), and a first flow regulating valve (14); the input end of the first flow regulating valve (14) is respectively connected to the first return water channel (13) and the first water supply channel (11), the output end of the first flow regulating valve (14) is connected to the second water supply channel (12), and the controller (16) is electrically connected to the first flow regulating valve (14); Wherein, the first water supply channel (11) is used to provide water at a first temperature; the second water supply channel (12) is used to provide water at a second temperature; and the first water return channel (13) is used to return water at a third temperature; The controller (16) is configured to obtain a setting instruction for the second temperature, and control the first flow regulating valve (14) to adjust the water flow of the first water supply channel (11) and the first water return channel (13) according to the setting instruction, so as to mix and form a water flow of the second temperature in the second water supply channel (12).

2. The air conditioning system according to claim 1, characterized in that The second water supply channel (12) is provided with a temperature sensor, and the temperature sensor is used to monitor and transmit the current water temperature of the second water supply channel (12); The controller (16) is specifically used for: Acquiring data on the current water temperature of the second water supply channel (12) and the second temperature; Comparing the current water temperature of the second water supply channel (12) with the data of the second temperature, and obtaining a temperature difference; Based on the temperature difference, the first flow regulating valve (14) is controlled to regulate the water flow of the first water supply channel (11) and the first water return channel (13) until the current water temperature of the second water supply channel (12) is equal to the second temperature.

3. The air conditioning system according to claim 2, characterized in that The main unit (1) further comprises a second water return channel (15) and a plate heat exchanger (17) for connecting to a second water return end of the fan (3); the outflow ends of the first water return channel (13) and the second water return channel (15) are both in communication with the plate heat exchanger (17), and the second water return channel (15) is in communication with the first water return channel (13).

4. The air conditioning system according to claim 3, characterized in that The air conditioning system further comprises: The radiation pipe (2) is provided with a first water supply end (21) and a first water return end (22), the first water supply end (21) is in communication with the second water supply channel (12), and the first water return end (22) is in communication with the first water return channel (13); The fan (3) is provided with a second water supply end (31) and a second water return end (32), the second water supply end (31) is communicated with the first water supply channel (11), and the second water return end (32) is communicated with the second water return channel (15); and The temperature control component (4) is connected to the controller (16) and is used to switch the operating mode and set the target value of the indoor temperature and humidity, so that the controller (16) adjusts the water supply temperature of the fan (3) and the radiation pipe (2).

5. The air conditioning system according to claim 4, characterized in that The air conditioning system further comprises a circulation pump (7), wherein an input end of the circulation pump (7) is connected to the second water supply channel (12), and an output end of the circulation pump (7) is connected to the first water supply end (21).

6. The air conditioning system according to claim 4, characterized in that The temperature control component (4) includes: A mode switching module (41) is used to switch between at least six operating modes, wherein the operating modes include: a cooling mode with a single fan (3), a cooling mode with a single radiation pipe (2), a mixed cooling mode with a fan (3) and a radiation pipe (2), a heating mode with a single fan (3), a heating mode with a single radiation pipe (2), and a mixed heating mode with a fan (3) and a radiation pipe (2); A temperature and humidity control module (42) is used to control the activation of a humidification function or a dehumidification function; and The data processing unit (43) is electrically connected to the mode switching module (41), the temperature and humidity control module (42), and the controller (16). The data processing unit (43) is used to receive the input mode instruction and the set temperature and humidity target value, and generate a control signal according to the real-time indoor temperature and humidity data, and transmit the control signal to the controller (16).

7. The air conditioning system according to claim 6, characterized in that The temperature control component (4) further includes: A display unit (44) is used to display the current operating mode, the set temperature and humidity target values, the actual indoor temperature and humidity, and the humidification / dehumidification status in real time; and The communication module (45) supports at least one wireless communication protocol and is linked with the controller (16) to realize remote mode switching and temperature and humidity adjustment.

8. The air conditioning system according to claim 6, characterized in that The temperature and humidity control module (42) is provided with a temperature and humidity detection unit, and the temperature and humidity detection unit is used to monitor the humidity and temperature of the environment in real time; The data processing unit (43) is used for: Acquiring humidity data monitored by the temperature and humidity detection unit; comparing the humidity data with a preset humidity target value; When the humidity data exceeds the preset humidity target value, a dehumidification start instruction is generated.

9. The air conditioning system according to claim 6, characterized in that The temperature and humidity control module (42) is provided with a temperature and humidity detection unit, and the temperature and humidity detection unit is used to monitor the humidity and temperature of the environment in real time; The controller (16) is used to: Acquiring humidity and temperature data monitored by the temperature and humidity detection unit; calculating a dew point temperature based on the humidity and temperature data; The second temperature is set based on the dew point temperature. The second temperature is equal to the sum of the dew point temperature and a compensation value. The compensation value is 0°C-5°C.

10. The air conditioning system according to claim 4, characterized in that The air conditioning system further comprises a buffer water tank (5), the input end of the buffer water tank (5) being in communication with the first return water end (22) and the second return water end (32), and the output end of the buffer water tank (5) being in communication with the second return water channel (15).

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