Air conditioner five-constant host and system thereof

Abstract

The utility model relates to the technical field of building environments, and discloses an air conditioner five-constant host and a system thereof. The host comprises a controller, a first water supply channel, a second water supply channel, a first water return channel and a first flow regulating valve; the input end of the first flow adjusting valve communicates with the first water return channel and the first water supply channel, the output end of the first flow adjusting valve communicates with the second water supply channel, and the controller is connected with the first flow adjusting valve. 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] This application belongs to the field of building environment technology, specifically relating to an air conditioning five-constant main unit and its system. Background Technology

[0002] In air conditioning systems, mixing technology is often used to precisely regulate the supply water temperature to meet different operating conditions. The core principle of mixing is to combine water of different temperatures in a specific ratio to achieve the designed output water temperature, thereby improving system flexibility and energy efficiency. For example, during partial load operation, mixing can prevent frequent start-ups and shutdowns of the main unit or excessive cooling / heating, reducing equipment wear and energy waste.

[0003] Currently, the mainstream approach in the industry is to use an external mixing solution, which involves configuring an independent mixing center device that connects to the air conditioning unit and terminal devices through components such as water pumps, valves, and heat exchangers to form a circulation loop.

[0004] However, this solution has significant technical bottlenecks: First, it has low energy efficiency. Independent mixing equipment requires additional electricity to drive water circulation, and long-distance pipelines increase friction and cause significant heat loss, with overall operating energy consumption accounting for 15%-20% of the total system energy consumption. Second, it occupies too much space. Independent mixing centers require dedicated machine rooms for equipment installation and pipeline layout, especially in space-constrained scenarios such as urban commercial complexes and data centers, which takes up a large amount of valuable building space. Third, the system is highly complex. Numerous connecting pipelines, valves, and control nodes not only significantly increase initial construction costs but also lead to an exponential increase in maintenance difficulty. Troubleshooting is time-consuming and labor-intensive, and damage to any component may trigger a chain reaction of system failures, seriously affecting the stability of power supply. Utility Model Content

[0005] To address the shortcomings of the existing technology, this application provides an air conditioning five-constant main unit and its system. By optimizing the main unit structure and functional modules, the external mixing center is eliminated, and the mixing water generation and treatment functions are integrated into the main unit. The mixing water is circulated and processed within the main unit, which simplifies the system architecture, effectively improves energy efficiency, reduces equipment operating costs and maintenance difficulty, and enhances system stability and space utilization.

[0006] The technical effects to be achieved in this application are realized through the following aspects:

[0007] In one aspect, this application provides an air conditioning five-constant main unit, the main unit including a controller, a first water supply channel, a second water supply channel, a first return water channel and a first flow regulating valve;

[0008] The input end of the first flow regulating valve is connected to the first return water channel and the first supply water channel respectively, and the output end of the first flow regulating valve is connected to the second supply water channel;

[0009] The controller is connected to the first flow regulating valve, and the controller is used to control the opening degree of the first flow regulating valve.

[0010] In some implementations, the second water supply channel is equipped with a temperature sensor, which is used to monitor and transmit the current water temperature of the second water supply channel.

[0011] In some implementations, the host further includes a second return water channel and a plate heat exchanger, wherein the second return water channel is connected to the first return water channel, and the outlet end of the second return water channel is connected to the plate heat exchanger; the second return water channel is used to return excess water.

[0012] In some implementations, the first flow regulating valve is a proportional three-way valve.

[0013] Secondly, this application provides an air conditioning system, comprising:

[0014] The five-constant air conditioning unit includes a second return water channel and a plate heat exchanger. The outlet end of the second return water channel is connected to the plate heat exchanger, and the five-constant air conditioning unit is as described above.

[0015] The radial pipeline is provided with a first water supply end and a first water return end. The first water supply end is connected to the second water supply channel, and the first water return end is connected to both the first water return channel and the second water return channel.

[0016] The fan is equipped with a second water supply end and a second water return end, the second water supply end being connected to the first water supply channel, and the second water return end being connected to the second water return channel; and

[0017] A temperature control component, connected to the controller, is used to switch operating modes and set target values ​​for indoor temperature and humidity, enabling the controller to adjust the temperature of the fan and the radiant duct.

[0018] In some implementations, the air conditioning system further includes a circulation pump, the input of which is connected to the second water supply channel, and the output of which is connected to the first water supply.

[0019] In some implementations, the temperature control component includes:

[0020] The mode switching module is used to switch between at least 6 operating modes, including: single fan cooling mode, single radiant duct cooling mode, fan and radiant duct mixed cooling mode, single fan heating mode, single radiant duct heating mode, and fan and radiant duct mixed heating mode.

[0021] The temperature and humidity control module is used to control the activation of the humidification or dehumidification function; and

[0022] 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 the input mode command and the set temperature and humidity target value, and generate a control signal based on the real-time indoor temperature and humidity data, and send it to the controller.

[0023] In some implementations, the temperature control component further includes:

[0024] The display unit is used to display the current operating mode, the set target temperature and humidity values, the actual indoor temperature and humidity, and the humidification / dehumidification status in real time; and

[0025] The 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. The wireless communication protocols include Modbus RTU, Wi-Fi, Bluetooth, ZigBee, NB-IoT, and LoRa.

[0026] In some implementations, the temperature and humidity control module includes a temperature and humidity detection unit, which is connected to the data processing unit.

[0027] 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 to receive the humidity data monitored by the temperature and humidity detection unit and generate a dehumidification start command based on a preset humidity target value.

[0028] In some implementations, a buffer water tank is also included, the input end of which is connected to the first return water end and the second return water end, and the output end of which is connected to the second return water channel.

[0029] In some implementations, the five-constant air conditioning unit also includes a water pump, the input end of which is connected to the output end of the buffer water tank, and the output end of which is connected to the plate heat exchanger.

[0030] In summary, this application has at least the following advantages:

[0031] The air conditioning system provided in this application integrates a first flow regulating valve and a controller, and directly regulates the temperature of the second water supply channel using the mixing structure of the first return water channel and the first supply water channel. This achieves precise temperature control while reducing the need for a separate mixing device. This application eliminates the external mixing center, integrating the mixing water generation and treatment functions within the main unit. The mixed water is then circulated within the main unit, simplifying the system architecture, resulting in a compact overall structure, effectively improving energy efficiency, reducing equipment operating costs and maintenance difficulty, and enhancing system stability and space utilization.

[0032] In addition, this structure allows the main unit to support the simultaneous output of water at two different temperatures without the need for additional temperature control equipment. Compared with traditional single-temperature main units, it saves space and simplifies the pipeline layout while simultaneously meeting the needs of dehumidification and cooling, demonstrating the innovative advantages of equipment integration and multifunctionality. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the air conditioning system in Embodiment 1 of this application.

[0034] Figure 2 This is a schematic diagram of the air conditioning system in Embodiment 2 of this application.

[0035] Figure 3 This is a schematic diagram of the temperature control component in Embodiment 2 of this application.

[0036] Figure 4 This is a schematic diagram of the air conditioning system in Embodiment 3 of this application.

[0037] Figure 5 This is a schematic diagram of the air conditioning system in Embodiment 4 of this application.

[0038] Marked in the image:

[0039] 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. Radiant 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 components; 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 Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this application, not all embodiments.

[0041] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0042] Example 1:

[0043] Please see the appendix Figure 1 This application proposes an air conditioning five-constant main unit, the main unit 1 including a controller 16, a first water supply channel 11, a second water supply channel 12, a first return water channel 13 and a first flow regulating valve 14; the input end of the first flow regulating valve 14 is connected to the first return water channel 13 and the first water supply channel 11 respectively, the output end of the first flow regulating valve 14 is connected to the second water supply channel 12, and the controller 16 is connected to the first flow regulating valve 14.

[0044] The first water supply channel 11 is used to supply water at a first temperature; the second water supply channel 12 is used to supply water at a second temperature; and the first return water channel 13 is used to return water at a third temperature. Specifically, in cooling mode, the water temperature relationship is first temperature < second temperature < third temperature, and in heating mode, the water temperature relationship is first temperature > second temperature > third temperature.

[0045] The controller 16 is configured to acquire a setting command 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 return water channel 13 according to the setting command, so as to mix and form the water flow of the second temperature in the second water supply channel 12.

[0046] The first flow regulating valve 14 is an actuator used to mix water flows of different temperatures and regulate the output water temperature. Specifically, it can be implemented by a proportional three-way valve, which controls the ratio of the two inlet water flow rates by changing the valve core opening.

[0047] Controller 16 refers to a control unit with data processing capabilities, which can be implemented using a microprocessor module. It generates valve position control commands by receiving temperature signals.

[0048] In this embodiment, the five-constant air conditioning unit 1, during operation, receives a second temperature setting command from the controller 16 when the terminal equipment requires water supply at a specific temperature. Based on the temperature gradient between the low-temperature water supplied by the first water supply channel 11 and the high-temperature water returning from 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 inlets according to the command, allowing the low-temperature water and high-temperature return water to mix as needed. The mixed water flow is then delivered to the terminal equipment 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 precisely matches the set requirements.

[0049] Specifically, in cooling mode, the first water supply channel 11 provides water at 7°C. The first return water channel 13 provides water at 24°C. The second temperature of the second water supply channel 12 is set to 19°C. The opening of the channel is dynamically adjusted based on the difference between the target water temperature of 19°C and the current water temperature of the second water supply channel 12, mixing the 7°C air conditioning outlet water with the 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.

[0050] In heating mode, the first water supply channel 11 provides water at 50°C. The first return water channel 13 provides water at 35°C. The second temperature of the second water supply channel 12 is set to 40°C. The opening of the channel is dynamically adjusted based on the difference between the target water temperature of 40°C and the current water temperature of the second water supply channel 12, mixing the 50°C air conditioning outlet water with the 35°C radiant return water. For example, if the actual inlet water temperature is below 40°C, the water flow ratio of the first water supply channel 11 is increased; if it is above 40°C, the water flow ratio of the first return water channel 13 is increased until the actual inlet water temperature stabilizes at 40°C.

[0051] By mixing two water streams at different temperatures in a specific ratio, precise temperature control is achieved through temperature difference compensation, avoiding the impact of temperature fluctuations from a single water source on the system and ensuring the stability and comfort of radiant cooling and heating. Specific temperatures can be flexibly set according to actual conditions, and no restrictions are imposed in this application.

[0052] In this structure, the first flow regulating valve 14 is integrated inside the main unit 1, optimizing the pipeline connection. It directly utilizes the waste heat from the return water for mixing, and compresses the mixing process within the main unit 1 for complete circulation, significantly shortening the water flow path and eliminating the need for a separate mixing center. Eliminating a separate mixing device reduces power consumption, and utilizing short pipelines minimizes heat loss, effectively improving energy efficiency. This design integrates the mixing function into the main unit 1, avoiding additional space requirements, greatly saving equipment installation space, simplifying the system architecture, reducing pipeline connection nodes and control levels, and improving system reliability and maintenance convenience.

[0053] In addition, the air conditioning system in this solution can supply two different temperatures of water at the same time, making it highly practical. The entire system operates without noise or drafts, providing a more comfortable and pleasant experience.

[0054] 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 implemented by means of a resistance temperature detector, a thermocouple, or a digital temperature probe, and its function is to collect the temperature data of the mixed water flow in real time and provide feedback signals for closed-loop control.

[0055] In conjunction with the use of a temperature sensor, the controller 16 is used to acquire data on the actual inlet water temperature and the second temperature; compare the current water temperature and the second temperature data of the second water supply channel 12, and obtain the temperature difference; based on the temperature difference, control the first flow regulating valve 14 to adjust the water flow of the first water supply channel 11 and the first return water channel 13 until the current water temperature of the second water supply channel 12 equals the second temperature.

[0056] The temperature difference refers to the deviation between the second temperature and the current water temperature of the second water supply channel 12. Specifically, it can be obtained through arithmetic subtraction or a difference calculation module with filtering. Its function is to quantify the degree of deviation between the current mixed water temperature and the target value, and to provide a control basis for the opening of the regulating valve.

[0057] In this embodiment, during system operation, the temperature sensor continuously collects the mixed water temperature output from 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 a preset second temperature in real time and calculates the temperature difference between the two. When the temperature difference is detected to be non-zero, the controller 16 generates a corresponding adjustment command to drive the first flow regulating valve 14 to change the opening ratio between 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 while decreasing the opening of the low-temperature water supply branch, thereby increasing the proportion of high-temperature water flow to raise the mixed water temperature. This adjustment process continues until the measured water temperature fed back by the temperature sensor matches the set temperature, forming a closed-loop control circuit.

[0058] By constructing the closed-loop feedback control mechanism described above, water temperature deviations caused by environmental disturbances can be automatically compensated, achieving precise dynamic control of the mixed water temperature and eliminating energy waste caused by temperature deviations. At the same time, it eliminates the complex control nodes found in independent mixing equipment, simplifying the system structure and correspondingly improving the stability and reliability of system operation.

[0059] In some embodiments, the host unit 1 further includes a second return water channel 15 for connection to the second return water end of the fan 3 and a plate heat exchanger 17. 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.

[0060] The second return water channel 15 allows 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.

[0061] Among them, the plate heat exchanger 17 refers to a device used to realize heat exchange between water and refrigerant. Its function is to perform secondary thermal treatment on the return water flow to improve energy utilization efficiency.

[0062] In this embodiment, during the mixing process of the air conditioning system, some high-temperature return water does not fully participate in the mixing, forming excess water. 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 complete the return and reprocessing without the need for an external independent mixing device, effectively reducing the reliance on pipe connection nodes and external components. The secondary thermal treatment of the return water by the plate heat exchanger 17 adjusts the water temperature, allowing it to directly participate in the next cycle. This avoids the problem of additional mixing treatment required for return water due to unstable temperature in traditional solutions, achieving efficient reuse of the return water.

[0063] In this structure, the excess water flow can be circulated and treated within the system through the combination design of the second return water channel 15 and the plate heat exchanger 17, reducing dependence on external components and reducing pipeline connection nodes. At the same time, the secondary heat treatment of the plate heat exchanger 17 improves energy utilization efficiency, resulting in a simple and compact system structure, enhanced operational stability, and low operating energy consumption.

[0064] In some embodiments, the first flow regulating valve 14 is a proportional three-way valve.

[0065] The proportional three-way valve is a control valve with three fluid channels that can proportionally distribute flow. Specifically, it can be implemented using an electric three-way valve body with linear flow regulation characteristics. The internal valve core displacement and opening degree have a linear relationship to achieve 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 mixing equipment. Specifically, the three ports refer to the high-temperature water inlet, the low-temperature water inlet, and the mixed water outlet. Connection to the pipeline can be achieved using flanges or threaded interfaces. Water temperature control is achieved by adjusting the ratio of the flow cross-sectional areas of the two inlets.

[0066] In this embodiment, when in standalone radiant cooling mode or mixed cooling mode, the proportional three-way valve will switch to an initial opening of 5% to precisely control the flow rate at the beginning of startup, which is 5% of the water flow in the first water supply channel 11 + 95% of the water flow in the first water return channel 13. Compared with the initial opening of 50%, this can prevent a large amount of low-temperature water from entering the radiant pipe and avoid condensation. At the same time, the controller 16 will automatically calculate the second temperature and dynamically adjust the opening of the proportional three-way valve based on the feedback of the actual radiant inlet water temperature displayed by the radiant cooling temperature sensor, so that the radiant cooling inlet water temperature can quickly reach the second temperature.

[0067] To further explain, during the mixing stage, controller 16 sends a control signal to the proportional three-way valve to drive the valve core. When it is necessary to increase the mixed water temperature, the valve core shifts towards the high-temperature return water channel side, increasing the cross-sectional area of ​​the high-temperature return water flow while decreasing the cross-sectional area of ​​the low-temperature supply water channel, thereby increasing the proportion of high-temperature return water; when it is necessary to decrease the water temperature, it performs the reverse adjustment action.

[0068] By leveraging the linear flow characteristics of the proportional three-way valve and forming a closed-loop control system with the controller 16, the temperature regulation accuracy of the mixed water is controlled within ±0.5℃, and the response time is shortened to less than 10 seconds, effectively improving response speed and water temperature control accuracy. This proportional three-way valve, through its integrated mechanical design, combines the functions of the independently installed mixing tank, circulating pump, and multi-stage valves in a traditional mixing system into a single valve body. This eliminates the need for a separate pump 6 power unit and heat exchanger chamber structure, greatly simplifying the system structure and resulting in a compact and simple design.

[0069] It should be noted that in the mixed refrigeration mode, the actual opening degree of the proportional three-way valve is obtained by the following formula: En=(En-1)+[KP(Tdj-Tdc1)+KD(Tdj-Tdj-1)+KI(Tdj-Tdj-4)].

[0070] In the mixed heating mode, the actual opening degree of the proportional three-way valve is obtained by the following formula: En=(En-1)+[KP(Tdc1-Tdj)+KD(Tdj-1-Tdj)+KI(Tdj-4-Tdj)].

[0071] Where En is the actual opening degree of the proportional valve. En-1 is the opening degree 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 4 cycles ago. KP is the proportional valve control proportional coefficient. KD is the proportional valve control derivative coefficient. KI is the proportional valve control integral coefficient. The parameters of KP, KD, and KI can be flexibly adjusted according to actual conditions.

[0072] By employing the combined control of proportional, derivative, and integral terms, system performance is effectively optimized, anti-interference capability is improved, temperature fluctuations are reduced, and thus the stability of regulation accuracy is ensured.

[0073] Example 2:

[0074] This embodiment is based on the above embodiment; please refer to [link / reference]. Figure 2 This application also provides an air conditioning system, including the above-mentioned air conditioning five-constant main unit 1, radiant duct 2, fan 3 and temperature control component 4.

[0075] The five-constant air conditioning unit 1 includes a second return water channel 15 and a plate heat exchanger 17, with the outflow end of the second return water channel 15 connected to the plate heat exchanger 17.

[0076] The radiant pipe 2 is equipped 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 both the first water return channel 13 and the second water return channel 15. The radiant pipe 2 is a terminal device that achieves radiant heat transfer from the top, ground, or sides through water circulation. Specifically, it can be implemented using a coil structure pre-embedded in the building structure. Its inlet end is connected to the second water supply channel 12 to receive the mixed water flow at a second temperature. The radiant pipe 2 can regulate the temperature of different building interfaces such as the top, ground, and sides, adapting to diverse indoor space layouts.

[0077] The fan 3 is equipped 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 refers to a terminal device that achieves temperature regulation through air convection. Specifically, it can be implemented as an indoor unit with a finned 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.

[0078] Temperature control component 4 is connected to controller 16 and is used to switch operating modes and set target values ​​for indoor temperature and humidity, enabling controller 16 to adjust the water flow temperature of fan 3 and radiant pipe 2. Temperature control component 4 refers to a control device integrating mode switching and data processing functions. Specifically, it can be implemented using a smart panel with a built-in microprocessor and communication module 45, achieving coordinated adjustment of the terminal devices through linkage with controller 16.

[0079] In this embodiment of the air conditioning system, the first water supply end 21 of the radiant pipe 2 receives a mixed second-temperature water flow from the second water supply channel 12, and transfers heat or cold to the radiant layer through pipe circulation. The first return water end 22 diverts the return water to 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 return water end 32 returns the water to the second return water channel 15 to form a circulation path. The temperature control component 4 receives indoor temperature and humidity data to generate control signals, and 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 mixing equipment. The radiant pipe 2 and the fan 3 are connected to the main water supply pipe and the return water pipe through independent pipelines, reducing the redundant pipeline layout required by traditional mixing centers.

[0080] By integrating the dual-end structure of radiant pipe 2 and fan 3, and replacing the external mixing center with a direct connection between the main water supply pipe and the return water pipe, not only is the additional energy consumption and pipeline losses caused by independent mixing equipment eliminated, but the space required for equipment installation is also reduced. The radiant pipe 2 and fan 3 adopt a separate water supply design, enabling simultaneous output of two water temperatures, which is highly practical and improves user comfort. Furthermore, the temperature control component 4 and controller 16 work together to achieve centralized temperature control at multiple ends, meeting diverse temperature requirements without the need for additional mixing equipment, significantly reducing system construction and maintenance costs.

[0081] 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 end 21. This arrangement allows water to flow from the second water supply channel 12 to the first water supply end 21, and then back from the first return water end 22 to the first return water channel 13, achieving internal water circulation, improving energy efficiency, and combining the advantages of energy saving and a simple, compact structure.

[0082] Please see the appendix 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.

[0083] The mode switching module 41 is used to switch between at least 6 operating modes, including: cooling mode of fan 3 alone, cooling mode of radiant pipe 2 alone, cooling mode of fan 3 and radiant pipe 2 together, heating mode of fan 3 alone, heating mode of radiant pipe 2 alone, and heating mode of fan 3 and radiant pipe 2 together.

[0084] The temperature and humidity control module 42 is used to control the start of the humidification or dehumidification function. Specifically, it can be achieved by using a humidity sensor and a solenoid valve linkage device. Through a closed-loop feedback mechanism, it actively adjusts the ambient humidity parameters, breaking through the limitations of traditional single-variable temperature control.

[0085] 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 command and the set temperature and humidity target value, generate control signals based on the real-time indoor temperature and humidity data, and transmit the control signals to the controller 16.

[0086] In this embodiment, after the user sets the target temperature and humidity parameters, the data processing unit 43 receives the instruction and continuously collects indoor temperature and humidity data. The mode switching module 41 automatically selects the operating mode according to the load type or selects the operating mode according to the user instruction. For example, in a high-humidity environment in summer, it starts the mixed cooling mode of fan 3 and radiant pipe 2, using fan 3 to assist in dehumidification.

[0087] Specifically, in the standalone 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 through a solenoid valve to provide cooling water to the second water supply end 31 of the fan 3.

[0088] In the cooling mode of the radiant pipe 2 alone, the connection input of the first flow regulating valve 14 and the first return water channel 13 is closed, while other connections are opened. The controller directly adjusts the first water supply channel 11 to water at the second temperature, providing water flow at the second temperature to the second water supply channel 12, thereby ensuring that the radiant pipe achieves cooling.

[0089] In the mixed cooling mode of fan 3 and radiant pipe 2, the first water supply channel 11 is opened via a solenoid valve to provide cooling water to the second water supply end 31 of fan 3; simultaneously, the first flow regulating valve 14 is also opened, and the first water supply channel 11 and the first return water channel 13 are mixed through the first flow regulating valve 14 to form the water flow of the second water supply channel 12, providing water flow at a second temperature to the radiant pipe, thus achieving mixed cooling. The heating mode is similar and will not be elaborated here.

[0090] Through the above settings, the multi-mode coordination 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.

[0091] In some embodiments, the temperature control component 4 further includes a display unit 44 and a communication module 45.

[0092] The 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. The display unit 44 can be implemented using a touch screen or an LCD screen, and is used to convert the operating mode, temperature and humidity set values, actual temperature and humidity, and humidification / dehumidification status into visual information, so that users can directly observe the system dynamics.

[0093] 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, the wireless communication protocols include Modbus RTU, Wi-Fi, Bluetooth, ZigBee, NB-IoT, and LoRa. Preferably, a circuit board integrating multiple protocol chips is used to establish a data channel between the controller 16 and external terminals, enabling remote command transmission and status feedback.

[0094] 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 a digital or graphical manner. When the user performs local operations, the display unit 44 maps changes in set parameters to the interface in real time, avoiding operational errors caused by information delays. The communication module 45 parses instructions from the mobile terminal or cloud platform through its built-in protocol stack and sends the parsed control signals to the controller 16, while simultaneously feeding back the current system status data to the terminal device. For example, under Wi-Fi connection, the user can adjust the target temperature of the fan 3 through a mobile application. At this time, the communication module 45 forwards the instruction to the controller 16, triggering the adjustment of the opening of the first flow regulating valve 14, and simultaneously sending the updated actual water temperature back to the application interface.

[0095] By integrating the multi-protocol communication module 45, the system can adapt to different IoT environments, enabling wireless signal transmission without the need for wired connections and the associated wiring, thus simplifying installation. Furthermore, this system supports remote terminal adjustment of temperature, humidity, and operating modes, reducing control lag caused by physical location limitations. Secondly, the system can select the optimal communication method based on different scenario requirements. For example, in low-power scenarios, the NB-IoT protocol can be used to extend device battery life, while in scenarios with high real-time requirements, the Wi-Fi protocol can be used to ensure rapid command response, thereby improving control reliability.

[0096] In addition, the display unit 44 enables users to intuitively obtain the complete operating parameters of the air conditioning system through the local interface, avoiding misoperation caused by opaque information.

[0097] In some embodiments, the temperature and humidity control module 42 is provided with a temperature and humidity detection unit, which is connected to the data processing unit 43. 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 to acquire 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 command when the humidity data exceeds the preset humidity target value.

[0098] Preferably, the temperature and humidity detection unit uses a digital temperature and humidity sensor, such as the SHT series or DHT series sensor, which provides a data basis for humidity control by periodically collecting environmental parameters.

[0099] The preset humidity target value refers to the upper limit of the allowable ambient humidity, which can be set through the user interface or remote configuration tools. For example, it can be set to 58% relative humidity to determine whether to trigger the dehumidification operation.

[0100] The dehumidification start command is a signal that controls the operation of the dehumidification equipment. Specifically, it can be sent to the controller 16 through a communication protocol. The controller 16 adjusts the main unit water temperature and the temperature control component 4 starts the fan coil unit to perform dehumidification.

[0101] 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 command is sent to the controller 16. After receiving the control signal, the controller 16 adjusts the opening of the flow valve, adjusts the water supply temperature of the host 1 and the operating status of the terminal equipment, and realizes 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 humidity control.

[0102] With the above settings, the air conditioning system can immediately start the dehumidification function when the ambient humidity is too high, effectively avoiding equipment corrosion or indoor dampness caused by condensation accumulation, further ensuring the comfort of the indoor space, and reducing the power consumption caused by redundant operation of the dehumidification equipment.

[0103] In some other 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. The controller 16 is used to acquire the 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, the second temperature being equal to the sum of the dew point temperature and a compensation value, the compensation value being in the range of 0℃-5℃.

[0104] Dew point temperature refers to 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 by substituting ambient temperature and relative humidity data into a preset algorithm model. This parameter is used to determine the condensation risk threshold.

[0105] The 0℃-5℃ range is a safety temperature difference set according to actual needs, ensuring that the outlet water temperature is higher than the dew point temperature and preventing condensation on the radiant surface. Specifically, in standalone radiant cooling mode, the compensation value is a variable related to the dew point temperature, and its specific value varies depending on the dew point temperature. This ensures that the main unit 1 matches a suitable outlet water temperature higher than the dew point temperature, effectively preventing condensation and achieving good radiant cooling performance. For example, the compensation value may be relatively large when the dew point temperature is low, and correspondingly smaller when the dew point temperature is high. Specifically, when the dew point temperature is less than 10℃, the compensation value is set to 5℃; when the dew point temperature is between 10℃ and 13℃, the compensation value is set to 3℃; when the dew point temperature is between 13℃ and 16℃, the compensation value is set to 2℃; when the dew point temperature is between 16℃ and 24℃, the compensation value is set to 1℃; and when the dew point temperature is greater than 24℃, the compensation value is set to 0.5℃. Through the above settings, the temperature can be quickly and accurately adjusted to the second temperature, avoiding condensation on the radiant surface.

[0106] In this embodiment, the temperature and humidity detection unit continuously collects indoor temperature and humidity data and transmits it to the controller 16. The controller 16 calculates the dew point temperature based on the current ambient temperature and relative humidity, and generates a dynamic temperature control benchmark. When the dew point temperature rises with the ambient humidity, the controller 16 sets the second temperature to a range of 0°C-5°C higher than the current dew point temperature, so that the water supply temperature is always higher than the condensation critical point.

[0107] This process achieves real-time matching of water supply temperature and environmental conditions through a closed-loop feedback mechanism, enabling precise control of the surface temperature of terminal equipment. This effectively avoids condensation on the radiant pipe 2, which can cause dampness and damage to the floor, improving user comfort and ensuring safe system operation.

[0108] Example 3:

[0109] The difference between this embodiment and Embodiment 2 is that, please refer to... 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.

[0110] Among them, the buffer tank 5 refers to a container device used to receive and temporarily store the return water from the end. It is preferably made of stainless steel or engineering plastic and has a sealed body, which plays the role of collecting mixed water flow and stabilizing system pressure.

[0111] In this embodiment of the air conditioning system, the return water from the radiant pipe 2 and the fan 3 enters the buffer water tank 5 through their respective outlets, where it naturally mixes to form a relatively uniform water flow. Due to the physical buffering effect of the internal volume of the buffer water tank 5, the impact of incoming water with different flow rates or temperatures is weakened, preventing pressure fluctuations in the pipeline caused by sudden changes in flow rate. After a brief stagnation in the tank, the mixed water flows smoothly into the second return water channel 15 through the outlet, and then enters the plate heat exchanger 17 to complete the circulation.

[0112] The internal return water buffer structure formed by the buffer tank 5 directly reduces the installation requirements of independent mixing equipment and its auxiliary pipelines, simplifying the multi-terminal return water path into a centralized buffer treatment, effectively reducing the complexity of pipeline design. In addition, it can ensure stable water pressure balance during water circulation, further ensuring the stability of water temperature regulation.

[0113] In some embodiments, the air conditioning five-constant main unit 1 further includes a water pump 6, the input end of which is connected to the output end of the buffer water tank 5, and the output end of the water pump 6 is connected to the plate heat exchanger 17. Preferably, the water pump 6 is a shielded water pump 6, used to drive the water in the buffer water tank 5 through the plate heat exchanger 17 to form a closed loop.

[0114] By installing the water pump 6, pipe resistance and internal flow channel resistance of the plate heat exchanger 17 can be overcome, ensuring stable water flow under design pressure. This stable flow ensures sufficient contact between hot and cold fluids in the plate heat exchanger 17, maximizing heat exchange efficiency. Furthermore, the water pump 6 ensures relatively stable water circulation, preventing localized overheating or overcooling and effectively improving system stability.

[0115] Example 4:

[0116] The difference between this embodiment and Embodiment 1 is that, please refer to... Figure 5 The air conditioning system in this embodiment also 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 supply water channel 12. An electric valve 19 is connected between the first supply water channel 11 and the second supply water channel 12.

[0117] In this embodiment, when the second flow regulating valve 18 is activated, during the mixed cooling operation, the connection between the first flow regulating valve 14 and the first water supply channel 11 is closed, and the electric valve 19 is closed. One stream of water flows from the first water supply channel 11 through the second water supply end 31 of the fan 3, and then through the second return end 32 to the second return channel 15, thereby achieving cooling by the fan 3.

[0118] Another water flow mixes the first return water channel 13 and the second return water channel 15 through the second flow regulating valve 18 to form a water flow at the second temperature. Specifically, the water flow from the first return water channel 13 enters through one input terminal of the second flow regulating valve 18, and the water flow from the second return water channel 15 enters through the other input terminal of the second flow regulating valve 18. The controller 16 receives the second temperature setting command 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 inlets according to the command, so that the low-temperature water from the second return water channel 15 and the high-temperature return water from the first return water channel 13 are mixed as needed. The mixed water flow is delivered to the radiant 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 provides water at 7°C, the water temperature in the second return channel is approximately 12°C; if the second water supply channel 12 provides water at 20°C, the water temperature in the first return channel 13 is approximately 25°C. When the current water temperature in the second water supply channel 12 is higher than the set 20°C, the second flow regulating valve 18 increases the flow rate of the water flowing through the second return channel, increasing the flow rate of the low-temperature water; or the second flow regulating valve 18 decreases the flow rate of the water flowing through the first return channel, reducing the flow rate of the high-temperature water. When the current water temperature in the second water supply channel 12 is lower than the set 20°C, the valve opening of the second flow regulating valve 18 decreases the flow rate of the water flowing through the second return channel, thereby reducing the flow rate of the low-temperature water; or the valve opening of the second flow regulating valve 18 increases the flow rate of the water flowing through the first return channel, thereby increasing the flow rate of the high-temperature water, so that the current water temperature in the second water supply channel 12 equals the set temperature.

[0119] In standalone 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, the water flows from the first water supply channel 11 to the second water supply end 31 of the fan 3, and then the water flows from the second return water end 32 of the fan 3 to the second return water channel 15, thereby achieving cooling by the fan 3.

[0120] In the cooling mode of the radiant pipe 2 alone, 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 opened, and the 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, and then flows through the second return water channel to the plate heat exchanger 17 for internal circulation, thereby realizing the cooling of the radiant pipe 2.

[0121] The aforementioned mixing system automatically compensates for water temperature deviations caused by environmental disturbances, achieving precise dynamic control of the mixed water temperature and eliminating energy waste caused by temperature deviations. Simultaneously, it enables internal water circulation, saving energy and protecting the environment, effectively improving energy utilization. Furthermore, it eliminates the complex control nodes found in independent mixing equipment, simplifying the system structure and correspondingly enhancing the stability and reliability of system operation.

[0122] In addition, based on Embodiment 1, an extra mixing structure is added, allowing for flexible selection of either the first flow regulating valve 14 or the second flow regulating valve 18 depending on specific circumstances, thus enhancing practicality. Furthermore, the air conditioning system has two mixing systems, providing a backup function. This ensures that maintenance or component replacement does not affect the operation of the air conditioning system, guaranteeing operational continuity.

[0123] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0124] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0125] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0126] In this application, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" a first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0127] Although the description of this application has been made in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. An air conditioning unit with five constant functions, characterized in that, The host (1) includes a controller (16), a first water supply channel (11), a second water supply channel (12), a first return water channel (13), and a first flow regulating valve (14). The input end of the first flow regulating valve (14) is connected to the first return water channel (13) and the first water supply channel (11) respectively, and the output end of the first flow regulating valve (14) is connected to the second water supply channel (12); The controller (16) is electrically connected to the first flow regulating valve (14), and the controller (16) is used to control the opening degree of the first flow regulating valve (14).

2. The five-constant air conditioning unit according to claim 1, characterized in that, The second water supply channel (12) is equipped with a temperature sensor, which is used to monitor and transmit the current water temperature of the second water supply channel (12).

3. The five-constant air conditioning unit according to claim 1, characterized in that, The host (1) also includes a second return water channel (15) and a plate heat exchanger (17). 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).

4. An air conditioning system, characterized in that, include: The air conditioning five constant host includes a second return water channel (15) and a plate heat exchanger (17), the outlet end of the second return water channel (15) is connected to the plate heat exchanger (17), and the air conditioning five constant host (1) is used as described in any one of claims 1-3. The 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). 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). as well as The temperature control component (4) is connected to the controller (16) and is used to switch the operating mode and set the target values ​​of indoor temperature and humidity, so that the controller (16) can adjust the temperature of the fan (3) and the radiant pipe (2).

5. The air conditioning system according to claim 4, characterized in that, The air conditioning system also 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 end (21).

6. The air conditioning system according to claim 4, characterized in that, The temperature control component (4) includes: The mode switching module (41) is used to switch between at least 6 operating modes, including: single fan (3) cooling mode, single radiant pipe (2) cooling mode, fan (3) and radiant pipe (2) mixed cooling mode, single fan (3) heating mode, single radiant pipe (2) heating mode, and fan (3) and radiant pipe (2) mixed heating mode. Temperature and humidity control module (42) is used to control the activation of humidification or dehumidification functions; 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 based on the real-time indoor temperature and humidity data, and send it to the controller (16).

7. The air conditioning system according to claim 6, characterized in that, The temperature control component (4) also includes: The display unit (44) is used to display the current operating mode, the set target temperature and humidity 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 equipped with a temperature and humidity detection unit, which is connected to the data processing unit (43); 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 to receive the humidity data monitored by the temperature and humidity detection unit and generate a dehumidification start command based on the preset humidity target value.

9. The air conditioning system according to claim 4, characterized in that, It also includes a buffer water tank (5), the input end of which 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).

10. The air conditioning system according to claim 9, characterized in that, The air conditioning five-constant main unit (1) also includes a water pump (6), the input end of which is connected to the output end of the buffer water tank (5), and the output end of which is connected to the plate heat exchanger (17).

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