Variable air volume pool variable frequency dehumidification and pool water constant temperature system

Abstract

The present application relates to the field of high-efficiency energy recovery and intelligent environment control technology, and discloses a variable air volume pool variable frequency dehumidification and pool water constant temperature system, which comprises a variable frequency dehumidification device, a pool water constant temperature device and a variable air volume adjusting device. The variable frequency dehumidification device comprises a box body with an air flow channel and an internal dehumidification heat pump unit, which sends the dehumidified warm and humid air into a pool hall and recovers the condensation heat generated by dehumidification. The pool water constant temperature device is provided with a heat exchanger in communication with the pool circulating water, and the heat exchanger is connected with the heat exchange component of the dehumidification heat pump unit through a heat medium pipeline, so as to transfer the recovered condensation heat to the pool water. The variable air volume adjusting device is arranged between the air flow channel of the variable frequency dehumidification device and the pool hall, and the air volume control unit thereof is used for adjusting the air supply amount sent to the hall. The devices work cooperatively, so that the air dehumidification and the pool water heating process are mutually coordinated to jointly maintain the constant air humidity and pool water temperature in the pool hall.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-efficiency energy recovery and intelligent environment control, and discloses a variable air volume pool variable frequency dehumidification and pool water constant temperature system. BACKGROUND

[0002] At present, indoor constant temperature pools generally face the problems of high energy consumption and high operation cost. The traditional system usually processes air dehumidification and pool water heating as independent processes. The condensation heat generated in the dehumidification process is directly discharged to the environment, causing energy waste. In addition, the pool water heating needs to consume a large amount of electric energy or heat energy. At the same time, the fixed air supply mode is difficult to adapt to the load fluctuation caused by the personnel density and seasonal changes in the pool area, resulting in low humidity control accuracy, poor local comfort, and high energy consumption of the fan under partial load.

[0003] Therefore, the prior art lacks an integrated solution that can effectively couple the dehumidification and heating processes and accurately regulate the air supply according to the demand. SUMMARY

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present application is to provide a comprehensive system that integrates air dehumidification, heat energy recovery, pool water constant temperature, and intelligent air supply, especially suitable for energy-saving environment control in large indoor pools and other large spaces.

[0005] To achieve the above purpose, the present application provides a variable air volume pool variable frequency dehumidification and pool water constant temperature system, which comprises a variable frequency dehumidification device, a pool water constant temperature device, and a variable air volume regulating device.

[0006] The variable frequency dehumidification device comprises a box body with an air flow channel and a dehumidification heat pump unit arranged in the box body. The dehumidification heat pump unit is configured to dehumidify the warm and humid air flowing through the air flow channel and then deliver it to the pool hall, and recover the condensation heat generated in the dehumidification process.

[0007] The pool water constant temperature device comprises a heat exchanger used in cooperation with the pool circulating water. The heat exchanger is connected to the corresponding heat exchange component in the dehumidification heat pump unit through a heat medium pipeline, so as to transfer the recovered condensation heat to the pool circulating water.

[0008] The variable air volume regulating device is arranged between the air flow channel of the variable frequency dehumidification device and the pool hall. The variable air volume regulating device has an air volume control unit for adjusting the air supply volume of the dehumidification heat pump unit to the pool hall.

[0009] The variable frequency dehumidification device, the pool water constant temperature device, and the variable air volume regulating device are used in cooperation to maintain the constant humidity and temperature of the pool hall through the mutual cooperation of air dehumidification and pool water heating.

[0010] Furthermore, the air volume control unit is located at the connection point between the main air supply duct and multiple regional air supply branch ducts downstream of the air flow channel; the air volume control unit includes a regulating air box with an air inlet and an air outlet, a first air valve rotatably disposed within the regulating air box, a rotary actuator for driving the first air valve to rotate, and a first controller disposed outside the regulating air box; the first air valve is configured to cooperate with the air outlet of the regulating air box, the air inlet of the regulating air box is connected to the main air supply duct, and the first controller is electrically connected to the rotary actuator for adjusting the opening degree of the first air valve.

[0011] Furthermore, the air volume control unit also includes a monitoring component, which includes an air volume monitor and a second humidity sensor installed at the air outlet of the regulating air box. The second humidity sensor is used to monitor the moisture content of the gas output by the regulating air box and generate a moisture content signal, which is then sent to the first controller. The air volume monitor is used to monitor the total amount of gas output by the regulating air box within a preset time period and generate a total gas amount signal, which is then sent to the first controller. The first controller adjusts the operation of the rotary drive to change the opening degree of the first air valve based on the moisture content signal and the total gas amount signal.

[0012] Furthermore, the dehumidifying heat pump unit includes a first return air mechanism, a first exhaust air mechanism, a heat exchange mechanism, a first fresh air mechanism, and a first air supply mechanism arranged in sequence; the first heat exchange mechanism includes an evaporator, a condenser, a compressor, and a frequency converter for driving the compressor. The warm and humid air generated in the pool is drawn in through the first return air mechanism, dehumidified or heated by the first heat exchange mechanism, and then delivered to the first air supply mechanism. The first air supply mechanism delivers the dry and hot air formed after the warm and humid air is dehumidified or heated to the pool hall for air heating or pool circulating water heating.

[0013] Furthermore, the variable frequency dehumidification device also includes a variable frequency controller electrically connected to the variable frequency drive and a first humidity sensor electrically connected to the variable frequency controller. The first humidity sensor is installed at the pool hall and / or the first return air mechanism of the dehumidification heat pump unit to collect the humidity signal of the air in the pool hall and feed it back to the variable frequency controller. The variable frequency controller is configured to adjust the speed of the compressor according to the humidity signal to adjust the air dehumidification capacity and condensation heat output.

[0014] Furthermore, the variable frequency dehumidification device also includes a combined air handling unit arranged in parallel with the dehumidification heat pump inside the housing. The combined air handling unit includes a second return air mechanism, a second exhaust air mechanism, a second fresh air mechanism, a second heat exchange mechanism, and a second air supply mechanism. The second return air mechanism is connected to the first return air mechanism through a second air valve. The second heat exchange mechanism includes an air mixing section, a filtration section, and a surface cooling section. The air mixing section is provided with a second fresh air inlet, a second return air inlet, and a third air valve. The surface cooling section is used to cool and dehumidify the air under summer operating conditions.

[0015] The second air valve is electrically connected to a second controller, which is configured to: in summer operating conditions, control the second air valve to reduce or close the opening to the dehumidifying heat pump unit, so that most or all of the gas is directly or auxiliaryly supplied after being treated by the combined air handling unit; in winter or high humidity operating conditions, control the second air valve to increase the opening, so that most or all of the gas enters the dehumidifying heat pump unit for dehumidification and reheating.

[0016] Furthermore, the pool water temperature control device also includes a constant temperature swimming pool and a circulating filtration unit; the heat exchanger is a plate heat exchanger, and the heat recovered by the dehumidifying heat pump unit heats the pool water in the constant temperature swimming pool through the plate heat exchanger; the circulating filtration unit includes a return water pipe, a filter circulating water pump, a filter, and a filter supply water pipe that cooperate with the constant temperature pool. The return water pipe is connected to the filter circulating water pump to send the pool water into the filter for filtration, and the pool water filtered by the filter is reused in the constant temperature swimming pool through the filter supply water pipe.

[0017] Furthermore, the circulating filtration unit also includes a coagulant dosing device, which is used to add coagulant to the pool water in the return water pipe.

[0018] Furthermore, the constant temperature swimming pool has a water inlet connected to the municipal water supply pipe on one side, and overflow troughs on both sides of the constant temperature swimming pool. The bottom of one of the overflow troughs is connected to a balancing water tank through a pipe. The top of the balancing water tank has an overflow pipe on one side, and the bottom of the balancing water tank has a drain pipe. The drain pipe is connected to the downstream of the overflow pipe. The bottom of the balancing water tank is connected to a coagulant dosing device through a return water pipe.

[0019] Furthermore, the constant temperature swimming pool has a suction port on one side wall, which is connected to a coagulant dosing device via a suction pipe.

[0020] Furthermore, the coagulant dosing device adds coagulant into the return water pipe, causing the filter circulating water pump to draw pool water from the return water pipe that has been doped with coagulant.

[0021] Furthermore, the filter circulating water pump is equipped with multiple pumps.

[0022] Furthermore, the filter is provided in multiple forms.

[0023] Furthermore, the filter circulating water pump is located upstream of the filter, the filter water supply pipe is connected to the clean water outlet of the filter, and the filter's sewage outlet is connected to the municipal drainage pipe.

[0024] Furthermore, the pool water constant temperature device also includes a water purification unit; the water purification unit includes a water quality monitor, a chlorine disinfectant dosing device, and a pH adjuster dosing device. The water quality monitor is connected to the chlorine disinfectant dosing device and the pH adjuster dosing device through pipelines to adjust the dosage of chlorine disinfectant and pH adjuster according to the pH value and residual chlorine parameters of the pool water in the constant temperature pool, so as to keep the water quality of the pool water in the constant temperature pool stable.

[0025] Furthermore, the chlorine disinfectant dosing device and the pH adjuster dosing device are installed on the water supply path of the filter water supply pipe. The water quality monitoring instrument is connected in series between the return water pipe and the chlorine disinfectant dosing device and the pH adjuster dosing device. It is used to compare the relevant indicators of the pool water after chlorine disinfection and pH adjustment with the water before treatment. It is also connected to a third controller. The third controller determines whether the water quality after filtration, disinfection and pH adjustment meets the standards based on the feedback signal from the water quality monitoring instrument. If it does not meet the standards, these steps are repeated.

[0026] Furthermore, the downstream of the water purification unit is connected to multiple branch water inlets at the bottom of the constant temperature swimming pool via a main water supply pipe and multiple branch water supply pipes.

[0027] Furthermore, the pool water constant temperature device also includes multiple second plate heat exchangers corresponding to different pool water circulation subsystems. Each pool water circulation subsystem includes an indoor pool water circulation system (constant temperature pool water circulation system), a children's pool water circulation system, and a spa pool water circulation system. Each water circulation system includes an independent water circulation pump set and a filtration device. The return water from each water circulation system exchanges heat with the heat medium provided by the dehumidifying heat pump unit or modular unit through the corresponding second plate heat exchanger to achieve zoned constant temperature control of different pool bodies.

[0028] Furthermore, the pool water constant temperature device also includes a three-way valve installed on the main pipeline downstream of the second plate heat exchanger. The three-way valve is used to switch the heat medium supply path between the dehumidifying heat pump unit and the modular unit, so that the heat output by the dehumidifying heat pump is preferentially supplied to each pool circulation system in winter or high humidity conditions, and the heat is provided by the modular unit in summer or when there is an additional heating demand.

[0029] Furthermore, the pool water constant temperature device also includes a floor heating booster pump, which is connected to the floor heating pipe layer through a water distributor to drive the circulation of the floor heating pipes at the bottom of the pool. The inlet of the floor heating booster pump is connected to the insulated water tank, and its outlet is connected to the heat exchange component of the modular unit or dehumidifying heat pump unit through a three-way valve to realize the heat source switching of the floor heating system at the bottom of the pool.

[0030] Furthermore, the pool water temperature control device also includes an insulated water tank, which is connected to the water supply pipelines of the constant temperature swimming pool, the water purification unit, and the circulating filtration unit. It is used to store heat and stabilize the system heating temperature during the circulating water heating process. The outlet of the insulated water tank is equipped with a constant pressure variable frequency pump, and the outlet of the constant pressure variable frequency pump is connected to the shower water supply pipeline via a branch pipe. It is used to provide constant temperature water from the insulated water tank after constant pressure and stabilization in the shower area of ​​the pool hall, so that the shower water temperature and pressure remain stable and do not interfere with the return water of the pool water temperature control device.

[0031] Furthermore, the pool water constant temperature device also includes several modular units. The modular units are connected to the surface cooling section of the combined air handling unit through chilled water pipelines to provide cooling capacity for air cooling and dehumidification under summer conditions. At the same time, the modular units are also connected to the underfloor heating booster pump, the insulated water tank and each of the second plate heat exchangers through heat medium pipelines to provide a heating source to the underfloor heating layer at the bottom of the pool or the sub-pool circulation system when necessary.

[0032] Furthermore, the pool water constant temperature device also includes an indoor fan coil branch connected to the modular unit. The indoor fan coil branch is connected in parallel with the chilled water outlet and return pipe of the modular unit to provide an independent cooling or heating supply to the air-conditioned area, which is different from that of the pool hall, without affecting the return air dehumidification function of the dehumidifying heat pump unit.

[0033] Furthermore, the pool water constant temperature device also includes at least two expansion tanks. The first expansion tank is installed on the cold / hot water main circulation pipeline of the cold / hot water source unit. The cold / hot water main circulation pipeline includes a main supply and return water pipe connected to two cold / hot water heat pump units and an air source heat pump unit, as well as a branch pipeline for supplying water to the indoor fan coil unit branch. The first expansion tank is connected to the main circulation pipeline to compensate for the expansion of water in the cold / hot water system caused by temperature changes and to stabilize the cold / hot water circulation pressure. The second expansion tank is installed on the heat medium pipeline between the dehumidification heat pump unit and the pool constant temperature device. The heat medium pipeline is connected to a three-way valve, a plate heat exchanger circuit, and a floor heating circulation circuit. The second expansion tank is connected to the heat medium pipeline to compensate for the water volume changes during the heat medium circulation process and to maintain the pressure stability of the pool water constant temperature heating system, the floor heating system, and the air handling system during operation.

[0034] Furthermore, the modular unit specifically includes at least two hot and cold water heat pump units and one air source heat pump unit. The two hot and cold water heat pump units are connected to the surface cooling section of the combined air handling unit, the second plate heat exchangers corresponding to each pool circulation system, and the pool bottom floor heating circulation pipes through hot and cold water pipelines, respectively, to provide cooling or heating to the air handling loop and the pool water constant temperature loop. The air source heat pump unit is connected to the insulated water tank, the floor heating booster pump, and each second plate heat exchanger through heat medium pipelines, to provide a stable heat source to supplement or replace the heat output of the dehumidifying heat pump unit in winter or when additional heating is required, thereby making the heat supply for deep air cooling dehumidification, pool water heating, and pool bottom floor heating more stable and reliable.

[0035] Furthermore, the bottom of the constant temperature swimming pool is provided with a functional composite layer and a load-bearing insulation layer from top to bottom; the functional composite layer includes a cement mortar anti-slip surface layer, a plain cement slurry bonding layer, and a cast-in-place concrete layer; the load-bearing insulation layer includes a floor heating pipe layer, a thermal insulation layer, a concrete pad layer, and a compacted plain soil layer arranged below the cast-in-place concrete layer; multiple heating pipes are laid in the floor heating pipe layer, and the heating pipes are connected to the heat exchange components of the dehumidifying heat pump unit.

[0036] Furthermore, the side wall of the constant temperature swimming pool is provided with a boundary insulation strip, which includes a polystyrene strip layer, a plaster layer and an outer wall arranged sequentially from the inside to the outside.

[0037] This invention provides a variable air volume (VAV) swimming pool frequency conversion dehumidification and pool water temperature control system. The core of its technical solution lies in constructing an integrated energy cycle and intelligent control loop. The system dehumidifies the warm, humid air returning from the pool lobby using a frequency conversion dehumidification device (containing a dehumidification heat pump unit), and actively recovers the condensation heat generated during the dehumidification process using the heat pump principle. The recovered heat is transferred to the pool circulating water through a heat exchanger (such as a plate heat exchanger) in the pool water temperature control device to compensate for the heat loss of the pool water, thus realizing the direct reuse of dehumidification heat energy.

[0038] Meanwhile, through a variable air volume (VAV) regulating device installed in the air supply duct, the system can dynamically adjust the air volume delivered to different areas based on the real-time humidity, temperature, or regional needs of the pool lobby, ensuring stable environmental parameters while reducing fan operating energy consumption. Through the coordinated operation of the frequency converter, humidity sensor, damper actuator, and controller, the system achieves a synchronized matching of air handling capacity, dehumidification capacity, heat recovery capacity, and air supply volume, ultimately realizing high-precision, high-efficiency, and constant control of humidity and pool water temperature in the pool lobby.

[0039] The beneficial effects of this invention are:

[0040] First, it achieves internal energy circulation for dehumidification and heating processes through heat pump technology, significantly reducing the independent energy consumption for pool water heating in traditional solutions, resulting in high overall energy efficiency.

[0041] Secondly, the introduction of variable air volume regulation and variable frequency control enables the system to respond precisely to dynamic loads, improving the comfort and stability of environmental control, while avoiding unnecessary fan power consumption and further enhancing energy-saving effects.

[0042] Third, the system integrates multiple functional modules into one, and manages them in a unified manner through intelligent control logic. This reduces equipment redundancy and computer room space occupation, and lowers system complexity and maintenance costs. It provides an advanced overall equipment solution for the green and efficient operation of public buildings, especially constant temperature swimming pools, and has broad market application prospects. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the planar structure of the pool water constant temperature device of the present invention;

[0044] Figure 2 This is a schematic diagram of the dehumidifying heat pump unit in operation according to the present invention.

[0045] Figure 3 This is a schematic diagram of the planar structure of the variable frequency dehumidification device and system used in conjunction with the present invention;

[0046] Figure 4 This is a schematic diagram of the planar structure of the dehumidifying heat pump unit and the combined air handling unit of the present invention;

[0047] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the variable air volume regulating device of the present invention;

[0048] Figure 6 This is a schematic diagram showing the connection between the dehumidifying heat pump unit and the constant temperature swimming pool of the present invention;

[0049] Figure 7 This is a schematic cross-sectional view of the constant temperature swimming pool of the present invention.

[0050] The reference numerals in the figures include:

[0051] 1. Variable frequency dehumidifier; 2. Pool water constant temperature device; 3. Variable air volume regulating device; 12. Dehumidifying heat pump unit; 121. First return air mechanism; 122. First exhaust air mechanism; 123. First heat exchange mechanism; 124. First fresh air mechanism; 125. First air supply mechanism; 15. Combined air handling unit; 151. Second return air mechanism; 152. Second exhaust air mechanism; 153. Second fresh air mechanism; 154. Second heat exchange mechanism; 155. Second air supply mechanism; 21. Heat exchanger; 22. Constant temperature swimming pool; 221. Functional composite layer; 2211. Anti-slip surface layer; 2212. Plain cement slurry bonding layer; 2213. Cast-in-place concrete layer; 222. Load-bearing insulation layer; 2221. Underfloor heating pipe layer; 2222. Thermal insulation layer; 2223. Concrete subbase layer; 2224. Compacted subgrade layer; 223. Boundary insulation strip; 2231. Polystyrene strip layer; 2232. Plaster layer; 2233. Exterior wall; 224. Overflow trough; 225. Equalization tank; 231. Return water pipe; 232. Filtered circulating water pump; 233. Filter; 234. Filtered water supply pipe; 235. Coagulant dosing device; 241. Water quality monitor; 242. Chlorine disinfectant dosing device; 243. pH adjuster dosing device; 25. Underfloor heating booster pump; 26. Insulated water tank; 271. Hot and cold water heat pump unit; 272. Air source heat pump unit; 28. Expansion tank; 32. Regulating air box; 33. First air valve; 34. Rotary actuator; 35. First controller; 36. Monitoring components; 361. Air volume monitor; 362. Second humidity sensor. Detailed Implementation

[0052] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0053] Please see Figures 1 to 7 As shown, the variable air volume (VAV) swimming pool frequency conversion dehumidification and pool water temperature control system of the present invention mainly consists of three modules: a frequency conversion dehumidification device 1, a pool water temperature control device 2, and a variable air volume (VAV) regulating device 3. The housing of the frequency conversion dehumidification device 1 is made of galvanized steel plate, with a specific airflow channel inside to guide the orderly flow of air. The dehumidification heat pump unit 12 is fixedly installed inside this housing, and its core components include an evaporator, a condenser, a compressor, and a frequency converter, which are connected by copper pipes to form a refrigerant circulation loop. When the warm and humid return air from the pool lobby is drawn into the housing and flows through the evaporator, the moisture in the air is condensed and released, while the refrigerant absorbs the latent heat of vaporization. The refrigerant carrying heat is then pressurized and heated by the compressor, and releases high-temperature condensation heat in the condenser. This process not only completes air dehumidification but also simultaneously recovers high-quality heat energy.

[0054] The heat exchanger 21 of the pool water constant temperature device 2 is preferably a stainless steel plate heat exchanger 21 in this embodiment, which is connected to the condenser-side circulating water circuit of the dehumidifying heat pump unit 12 through a copper heat medium pipeline with an insulation layer. The recovered condensation heat is transferred to the circulating water drawn from the pool through the heat exchanger 21, thereby heating the pool water.

[0055] Specifically, the variable air volume regulating device 3 is installed in the air supply duct system after the dehumidification device outlet and before the pool hall air supply outlet. Its air volume control unit can be one or more independent air valve actuators, which adjust the opening degree in real time according to the control signal, thereby changing the dry air volume supplied to each area of ​​the hall.

[0056] These three devices work together through pipelines and control circuits. Variable frequency dehumidifier 1 adjusts the dehumidification intensity and heat generation according to the humidity of the hall, pool water constant temperature device 2 uses this heat to maintain the water temperature, and variable air volume device precisely distributes the treated air according to the needs of each area, together forming a closed-loop, interconnected temperature and humidity control system. Compared to the isolated operation of dehumidification and heating systems and the crude air supply mode in existing technologies, this solution achieves tiered utilization and on-demand distribution of energy through system integration and energy coupling, fundamentally improving overall energy efficiency.

[0057] Specifically, in this embodiment, the air volume control unit is installed at the intersection of the system's main air supply duct and multiple air supply branch ducts leading to different areas (such as the pool area, rest area, and changing area). The regulating air box 32 is a rectangular metal shell, with a circular air inlet on one side that is securely connected to the main air supply duct via a flange, and an air outlet on the other side that is connected to the air supply branch ducts of each area via a distribution main duct.

[0058] Specifically, inside the regulating air box 32, one or more rotatable metal blades are mounted via a rotating shaft to form a first air valve 33. A sealing ring is provided around the blades. The rotating shaft extends to the outside of the air box and is connected to the output shaft of a servo motor or electric actuator (i.e., rotary driver 34) via a coupling.

[0059] The first controller 35 (DDC controller) is installed in the protective box on the outer wall of the air box. It is connected to the rotary driver 34 through a cable and can output control signals to drive the rotary driver 34 to move, thereby driving the blades of the first air valve 33 to rotate, changing its blocking angle relative to the air outlet, and realizing continuous stepless adjustment of the air supply cross-sectional area of ​​the branch.

[0060] Compared to existing technologies that use manual or simple on / off electric air valves, this solution achieves precise, dynamic, and automated adjustment of the air supply volume, which can better match regional load changes and eliminate overheating, overcooling, or uneven ventilation.

[0061] Specifically, in this embodiment, the monitoring component 36 further enhances the intelligence and accuracy of airflow control. The airflow monitor 361 uses a Pitot tube, but in actual use, a thermal or vortex flow sensor can also be used. Its probe extends into the outlet duct of the regulating air box 32 to measure and output volumetric flow rate or wind speed signals in real time.

[0062] The second humidity sensor 362 (such as a capacitive or resistive humidity probe) is also installed at the air outlet to monitor the humidity content of the air to be delivered to the area. The signal lines of both sensors are connected to the analog or digital input module of the first controller 35.

[0063] Specifically, the first controller 35 has a preset control algorithm, such as a PID algorithm, which compares the received real-time air volume signal with the target air volume value and the received humidity signal with the set humidity value of the area. After calculation, it outputs a new control signal to the rotary driver 34 to adjust the opening of the first air valve 33.

[0064] For example, when an increase in the number of people and an upward trend in humidity are detected in a certain area, the controller can instruct the opening of the air valve in the branch pipe of that area to increase the flow of more dry air; conversely, it can decrease the opening.

[0065] Compared to existing technologies that rely solely on return air duct parameters or simple timer control, this solution adjusts based on direct parameter feedback from the branch end, resulting in a faster response, control that is closer to actual needs, and more significant energy-saving effects.

[0066] Specifically, in this embodiment, the air handling process of the dehumidifying heat pump unit 12 is further detailed. Inside the housing, arranged sequentially along the airflow direction, are a first return air mechanism 121 (a return air section with a return air inlet and a built-in primary filter), a first exhaust air mechanism 122 (an adjustable exhaust valve for discharging some polluted air), the heat exchange mechanism (i.e., the surface cooling section and reheat section where the evaporator and condenser are located), a first fresh air mechanism 124 (a fresh air inlet with an insect screen and a regulating valve), and a first air supply mechanism 125 (a fan section with a built-in air supply fan).

[0067] The evaporator and condenser, as the core of the heat exchange mechanism, are finned tube heat exchangers 21, belonging to the low-temperature side and high-temperature side of the refrigeration cycle, respectively. The compressor is a scroll or screw variable frequency compressor, and its power input terminal is connected to a frequency converter.

[0068] During operation, warm, humid air from the pool lobby is driven by fans and flows sequentially through the return air vents, the evaporator (where it is cooled and dehumidified), and the condenser (where it is heated). Finally, the warm, dry air is pressurized by the supply fan and returned to the lobby through the supply ductwork. The recovered heat, besides heating the air itself, is also carried away by circulating water on the condenser side for heating the pool water.

[0069] Compared to existing dehumidifiers or air conditioning units with single functions, the dehumidifying heat pump unit 12 in this solution highly integrates cooling, heating, dehumidification, and energy recovery functions into a coherent air handling process, with a compact structure and high energy transfer efficiency.

[0070] Specifically, in this embodiment, the frequency converter and the first humidity sensor constitute the core feedback control loop of the dehumidification system. The first humidity sensor is a high-precision type, which can be suspended in a representative position in the pool hall (such as 1.5 meters above the water surface) and / or embedded in the wall panel of the dehumidifier unit's return air section.

[0071] The first humidity sensor continuously monitors the relative humidity of the air and transmits a 4-20mA current signal or digital signal to the frequency converter via a shielded cable. The frequency converter is a dedicated industrial controller with a set target humidity range (e.g., 60% ± 5% RH). When the measured humidity is higher than the set upper limit, the frequency converter increases the frequency command output to the frequency converter, driving the compressor speed to increase, thereby enhancing the cooling and dehumidification capacity and condensation heat output; when the humidity is lower than the set lower limit, the compressor speed is reduced.

[0072] Compared to existing technologies where compressors often operate at a fixed frequency or with simple start-stop mechanisms, this solution uses humidity feedback to perform stepless speed regulation of the compressor, enabling precise matching of dehumidification capacity, heat generation, and real-time load, thus avoiding energy waste and equipment wear and tear from frequent start-stop cycles.

[0073] Specifically, in this embodiment, the combined air handling unit 15 and the dehumidifying heat pump unit 12 are arranged in parallel airflow within the housing. The combined unit also includes complete air handling functional sections: a second return air mechanism 151, a second exhaust air mechanism 152, a second fresh air mechanism 153, a second heat exchange mechanism 154 (including an air mixing section, a medium-efficiency filter section, and a surface cooling section), and a second air supply mechanism 155.

[0074] The inlet of the second return air mechanism 151 is connected to the common return air duct before the first return air mechanism 121 of the dehumidifying heat pump unit 12 via an adjustable second air valve. The second controller controls the second air valve according to seasonal or operating condition signals (which may come from temperature and humidity sensors or be manually switched).

[0075] In hot and humid summer weather, when the outdoor fresh air enthalpy is high, the second controller will close or shut off the second air valve, so that most of the return air enters the surface cooling section of the combined unit for conventional cooling and dehumidification. At this time, the dehumidification heat pump may only be used as an auxiliary or standby, which is beneficial to reduce the consumption of high-grade electrical energy (compressor power consumption) while meeting the dehumidification requirements.

[0076] In winter or during transitional seasons with high humidity (low outdoor temperature but high indoor humidity), the second controller opens the second air valve to guide most or all of the return air into the dehumidifying heat pump unit 12, taking advantage of its efficient dehumidification and heat recovery to heat the air or pool water.

[0077] Compared to existing technologies that operate in a single heat pump dehumidification mode throughout the year, this solution optimizes the operating strategy by switching between parallel units and intelligent air valves, thereby improving the system's overall energy efficiency ratio and adaptability throughout the year.

[0078] Specifically, in this embodiment, the pool water constant temperature device 2 constitutes an independent water circulation heating and purification subsystem. The constant temperature swimming pool 22 is a reinforced concrete structure with ceramic tiles on its inner surface. The primary side (heat medium side) of the plate heat exchanger 21 is connected to the condenser water circuit of the dehumidifying heat pump unit 12, while the secondary side (pool water side) is connected to the pool water circulation pipeline.

[0079] The return water pipe 231 of the circulating filtration unit is located at the water inlet at the bottom of the pool wall. Pool water enters the return water pipe 231 by gravity or water pump suction, and is pressurized by one or more vertical centrifugal circulating water pumps 232. It is then transported to the quartz sand filter 233 or multi-media filter 233 for filtration to remove suspended impurities. The filtered clean water is returned to the pool through the water supply pipe (usually located at the water inlet on the upper part of the pool wall or the bottom of the pool).

[0080] The heat transfer process is as follows: The condensation heat recovered by the dehumidifying heat pump heats the circulating water (closed system, usually softened water) flowing through the condenser. This high-temperature water enters the primary side of the plate heat exchanger 21 and transfers heat to the pool water flowing on the secondary side, thereby heating the pool water.

[0081] Compared to existing technologies that use boilers or electric heaters to directly heat pool water, this solution makes full use of the waste heat from the dehumidification process, significantly reducing the direct energy consumption for heating pool water.

[0082] Specifically, in this embodiment, the water purification unit realizes automated monitoring and regulation of water quality. The water quality monitor 241 is an online multi-parameter detector, whose detection probe (such as pH electrode, oxidation-reduction potential (ORP) electrode) is immersed in the sampling flow path led out from the return water pipe 231 or the main pipeline bypass, to monitor key indicators such as pH value and residual chlorine (or ORP value) of the pool water in real time.

[0083] The water quality monitor 241 transmits electrical signals to the chlorine disinfectant dosing device 242 (such as a sodium hypochlorite dosing pump) and the pH adjuster dosing device 243 (such as a sodium carbonate or hydrochloric acid dosing pump) interlocked with it. When the residual chlorine value is lower than the set range, the control circuit will start the chlorine dosing pump to inject disinfectant into the filtered water supply pipe 234 in proportion; when the pH value deviates from the neutral range, the corresponding acid or alkali dosing pump will be started for correction.

[0084] This allows the pool water quality to be automatically maintained within healthy and hygienic standards. Compared to existing technologies that rely on manual testing and chemical dosing, this solution achieves continuous and automated water quality management, ensuring water quality stability and reducing human error and chemical waste.

[0085] Specifically, in this embodiment, the coagulant dosing device 235 is integrated into the circulating filtration process to improve the filtration effect. The coagulant dosing device 235 is a solution tank with a stirrer and a metering pump, and its outlet is connected to the return water pipe 231 section before the inlet of the filter circulating water pump 232 through a thin tube.

[0086] When the system is running, the metering pump continuously or intermittently injects polyaluminum chloride (PAC) or other coagulant solutions into the flowing pool water at a set ratio. Tiny suspended solids and colloidal substances in the pool water flocculate into larger flocs under the action of the coagulant, which are then more easily intercepted and removed in the subsequent quartz sand filter 233.

[0087] Compared to physical filtration alone, this solution enhances the filtration process through chemical coagulation, which can more effectively remove turbidity, organic matter and some microorganisms from the water, resulting in better effluent quality and extending the backwashing cycle of filter 233.

[0088] Specifically, in this embodiment, the pool structure of the constant temperature swimming pool 22 is specially designed for heat preservation and heating. From the inside out, the pool bottom consists of: an anti-slip surface layer 2211 (such as ceramic tiles or a professional swimming pool coating), a cement slurry bonding layer 2212 (used for bonding the surface layer), and a cast-in-place concrete layer 2213 (the pool structure layer). Below this is a load-bearing insulation layer 222, including: a floor heating pipe layer 2221 (laying PEX or PERT plastic heating pipes, with pipe spacing determined according to heat load calculations, preferably 150-300mm), a thermal insulation layer 2222 (such as extruded polystyrene (XPS) board, 50-100mm thick), a concrete pad layer 2223 (serving for leveling and protection), and a compacted soil layer 2224.

[0089] The heating pipes are connected to an external heat medium circulation system via a manifold. This heat medium can also be derived from the waste heat recovered by the dehumidifying heat pump unit 12. In winter or when it is necessary to strengthen the insulation of the pool bottom, hot water flows through the underfloor heating pipes to directly radiate heat to the pool bottom, reducing heat loss of the pool water through the pool bottom and improving the comfort of swimmers' feet.

[0090] Compared to existing technologies that only heat the pool water while ignoring heat loss from the pool structure, this solution improves overall insulation performance and reduces the heat load during long-term operation by actively insulating and heating the pool bottom.

[0091] Specifically, in this embodiment, the boundary insulation strip 223 is a special treatment for the thermal bridging effect of the pool sidewall. On the inner surface of the concrete wall of the pool sidewall that is in contact with the external soil or atmosphere, a layer of polystyrene foam board strips (30-50mm thick) is first pasted and fixed as the main insulation layer; then, crack-resistant cement mortar is applied to the outside of the foam board as a plaster layer 2232, which serves to protect and level the surface; the outermost layer is the interior decorative surface layer of the pool (such as tiles) or the exterior wall 2233 of the building.

[0092] This design effectively blocks the heat transfer from the pool interior to the outside through the concrete walls. Compared to traditional pools with no additional insulation or discontinuous insulation on the sidewalls, this solution significantly reduces heat loss through the sidewalls and improves the overall thermal performance of the pool enclosure.

[0093] Specifically, in this embodiment, the water supply and drainage system design of the constant temperature swimming pool 22 ensures water level balance and convenient water replenishment. A water inlet with a valve is pre-embedded in the upper part of one side of the pool wall, directly connected to the municipal water supply network for initial water filling and daily water replenishment. Overflow channels are provided along the top of the pool walls on both sides, and the channels are covered with gratings.

[0094] When swimmers create splashes or overfill their tanks, water overflows into the overflow troughs. One of the overflow troughs has a drain outlet at the bottom, which is connected via pipe to an equalization tank 225 underground or in the equipment room. The equalization tank 225 serves to regulate fluctuations in the pool system's water volume, accommodate backwash drainage, and act as a suction well for the circulating water pump.

[0095] An overflow pipe at the top prevents the pool from overflowing, while a drain pipe at the bottom empties the pool during maintenance. The water from the drain pipe and the overflow pipe is then combined and discharged into the municipal drainage network. The bottom of the equalization tank 225 is connected to the filtration and circulation system via the aforementioned return pipe 231. This design ensures a stable water source for the circulation pump and maintains a dynamic balance in the pool's water level.

[0096] Specifically, in this embodiment, the suction port provides a convenient interface for daily cleaning of the swimming pool. An interface with a removable cover is pre-embedded on the side wall of the pool near the bottom, connecting to a section of suction pipe. The other end of this suction pipe is connected to the return water pipe 231 of the circulating filtration system, typically before the coagulant dosing device 235.

[0097] When bottom sludge removal is required, a submersible pump or the suction of the main circulation pump can be connected to the suction port via a hose to directly pump the sludge deposited at the bottom of the pool into the circulation filtration system for treatment, without having to drain the pool water.

[0098] Compared to relying entirely on manual cleaning or using a separate pool bottom cleaning machine, this solution utilizes the existing circulation system for sludge suction, resulting in lower equipment investment, easier operation, and easier integration into automated control systems.

[0099] Specifically, in this embodiment, the coagulant dosing point is optimized. The outlet of the dosing device is directly connected to the return water pipe 231 near the suction port of the filter circulating water pump 232. This design ensures that the coagulant receives sufficient mechanical agitation and mixing when entering the pump impeller, and the resulting flocs have sufficient reaction and growth time before entering the filter 233, thereby achieving optimal coagulation and filtration effects.

[0100] Compared to adding the coagulant to filter 233 or into the pool, this solution ensures sufficient contact between the agent and the water to be treated, improves coagulation efficiency, and avoids direct chemical impact on the pool water.

[0101] Specifically, in this embodiment, the filter circulating water pump 232 and the filter 233 are configured with one pump in operation and one on standby, or multiple pumps connected in parallel. For example, two or three filter circulating water pumps 232 of the same model are set up, and the main standby switching or parallel operation is realized through electrical control. When one pump fails, the system can still maintain basic operation, which improves the reliability and availability of the system.

[0102] Similarly, filters 233 can also be configured in pairs or more in parallel, allowing for backwashing in turn without interrupting the entire pool's filtration process. This configuration is particularly suitable for public swimming pools where high operational continuity is required. Compared to a simpler single-pump, single-filter configuration, this solution significantly improves system stability and ease of maintenance.

[0103] Specifically, in this embodiment, the layout of the filter 233 and its associated pipelines clearly defines the water flow direction and sewage discharge path. The outlet of the filter circulating water pump 232 is connected to the inlet of one or more parallel filters 233 (such as pressure-type quartz sand filters 233) via a pipeline.

[0104] The filtered clean water flows out from the top outlet of filter 233 and is returned to the pool via filter supply pipe 234. At the bottom of each filter 233, there is a drain outlet connected to a drain pipe, which is equipped with a backwash valve.

[0105] When the pressure difference of filter 233 increases and backwashing is required, the valve can be switched to reverse the water flow to the filter media, and the trapped dirt can be directly discharged into the municipal drainage network through the drain pipe.

[0106] This design separates the filtration and cleaning functions, ensuring that the filtered water quality is not affected by cleaning wastewater. Compared to some designs that discharge backwash water back to the equalization tank 225, this solution avoids the recirculation of contaminants within the system.

[0107] Specifically, in this embodiment, the pool water distribution pipeline adopts a tree-like branching structure to achieve uniform water distribution. The main water supply pipe from the water purification unit has a larger diameter and is laid along the edge of the pool. From this main water supply pipe, several smaller diameter branch water supply pipes branch off, and these branch pipes are connected at reasonable intervals (e.g., 2-3 meters) to water inlets (usually duckbill-shaped or rotary outlets) pre-embedded in the lower part of the pool sidewall or the pool bottom.

[0108] This design ensures that the heated and purified pool water can be returned to all parts of the pool evenly and smoothly, avoiding stagnant water zones and ensuring uniform distribution of water temperature and chemicals within the pool. Compared to a single or a few water inlets, this solution promotes overall circulation and mixing of the pool water through multi-point water distribution, improving the uniformity of water quality and temperature.

[0109] Specifically, the system is extended to complex swimming pool venues containing multiple different types of pools (such as adult swimming pools, children's wading pools, and spa whirlpools). Each pool has an independent circulating water subsystem, including a dedicated circulating water pump, filter 233, and a second plate heat exchanger 21.

[0110] The primary side (heat medium side) of these independent second plate heat exchangers 21 can be connected in parallel or in series to a common heat medium main pipe, the heat source of which can come from the dehumidifying heat pump unit 12. By adjusting the flow rate of the circulating pumps of each subsystem and the opening degree of the primary side valves of each plate heat exchanger, independent and precise control of the water temperature of each pool can be achieved.

[0111] For example, children's pools and spa pools may require higher water temperatures than standard pools, which can be achieved by allocating more heat transfer fluid flow to their heat exchangers. Compared to using a single circulating heating system for the entire venue, this solution meets the differentiated and personalized temperature control needs of different pools, and offers greater flexibility in operation and management.

[0112] Specifically, in this embodiment, the heat medium supply source has an intelligent switching function to optimize energy utilization. A three-way regulating valve or a switching valve group consisting of two two-way valves is installed on the heat medium main pipe connecting the plate heat exchanger of each pool circulation subsystem. One inlet of the valve group is connected to the heat medium output pipe of the dehumidifying heat pump unit 12, and the other inlet is connected to the auxiliary heat source module (such as the heating circuit in the modular unit).

[0113] During winter or high humidity seasons, when the dehumidifying heat pump unit 12 is running and generating excess heat, the control system will switch the three-way valve to the path that prioritizes the use of heat from the dehumidifying heat pump.

[0114] In summer, the dehumidifying heat pump may mainly operate in dehumidification mode with limited heat production, or when there is a need for rapid heating of the pool water, the control system can switch the three-way valve to or mix in the heat provided by the modular unit.

[0115] Compared to using only a single heat source, this solution ensures a stable and efficient supply of constant-temperature heat source for pool water under different operating conditions throughout the year through the complementarity of multiple heat sources and intelligent switching.

[0116] Specifically, the underfloor heating booster pump 25 is a small, low-head centrifugal pump. Its inlet is connected to a manifold containing underfloor heating return water via a pipe, and its outlet is connected to a distributor. The branches of the distributor correspond to the underfloor heating pipe circuits in different areas of the pool bottom. The start-up, shutdown, and speed of the underfloor heating booster pump 25 can be controlled by a thermostat, which detects the pool bottom temperature or the return water temperature.

[0117] At the same time, the floor heating circulation loop can also be selectively connected to the heat medium loop of the dehumidifying heat pump unit 12 or the heat medium loop of the modular unit through a three-way valve or valve group to obtain a heat source.

[0118] Compared to relying solely on the residual pressure of the main circulation system to drive the underfloor heating coils, this solution sets up a dedicated pump for the underfloor heating system, ensuring sufficient flow and pressure of circulating water in the underfloor heating pipes. This is especially true when the pipes are long and have high resistance, thus ensuring a more reliable heating effect.

[0119] In this embodiment, the insulated water tank 26 is a large pressurized or unpressurized hot water storage tank with or without heat exchange coils (serving as a heat storage medium). It is connected to the secondary side (pool water side) piping of the plate heat exchanger 21 to absorb and store excess heat from the pool water circulation. A constant pressure variable frequency pump installed at its outlet is used to maintain the stability of the outlet water network pressure.

[0120] One branch of the constant pressure variable frequency pump is connected to the hot water supply network in the shower area. When someone is showering, the constant pressure variable frequency pump starts, drawing hot water from the top of the insulated water tank 26 and supplying it to the shower head at a constant pressure. Because the water tank stores excess heat from the system, the shower hot water does not need to be heated immediately, and it is physically isolated from the pool circulating water, ensuring hygiene and safety.

[0121] Compared to setting up separate gas or electric water heaters for shower water supply, this solution cleverly utilizes the system's waste heat, achieving energy reuse and reducing the overall hot water supply cost of the venue.

[0122] Preferably, the modular unit serves as both a cooling source and an auxiliary heat source for the system. In summer, the modular unit (such as an air-cooled heat pump unit or a screw chiller) operates in cooling mode, and the chilled water produced is transported through insulated pipes to the surface cooling section inside the combined air handling unit 15 to cool and dehumidify the mixed fresh air and return air.

[0123] At the same time, the modular unit can also generate hot water when needed through mode switching or a separately configured heating unit, and provide auxiliary heat to the underfloor heating system, the insulated water tank 26 and the plate heat exchangers of each swimming pool subsystem through other heat medium pipelines.

[0124] This design allows the modular unit and the dehumidifying heat pump unit 12 to complement each other: the modular unit is responsible for handling peak summer cooling loads and providing auxiliary heat sources, while the dehumidifying heat pump focuses on high-efficiency dehumidification and waste heat recovery. Compared to configuring completely independent cold and heat source systems, this solution improves equipment utilization and reduces initial investment through the reuse and integration of equipment functions.

[0125] Specifically, in this embodiment, the indoor fan coil unit branch enables independent temperature control for the area outside the pool lobby. This indoor fan coil unit branch is drawn from the chilled water / hot water supply and return main of the modular unit, serving the air conditioning terminals (fan coil units) in non-pool areas such as office areas, changing rooms, and reception areas. These fan coil units have independent thermostats and can independently adjust the temperature of their respective rooms.

[0126] Because this branch is decoupled from the air handling system (dehumidifying heat pump and combined unit) of the pool hall in both the air and water circuits, its operation will not interfere with the strict humidity control of the pool hall at all.

[0127] Compared to using the same air handling system to serve all areas, this solution not only meets the differentiated environmental needs of different functional areas, but also ensures the independence and precision of environmental control in the core area (swimming pool lobby).

[0128] In this embodiment, preferably, a dual expansion tank configuration 28 is used to stabilize the pressure of different pressure systems. The first expansion tank 28 is a diaphragm tank, connected to the return water pipe 231 near the highest point of the hot and cold water circulation system of the modular unit. It is used to absorb the volume expansion and contraction of the system caused by water temperature changes, maintain the stability of the system pressure, and prevent water pump cavitation and system overpressure.

[0129] The second expansion tank 28 is connected to the highest point of the heat medium circulation system formed by the dehumidifying heat pump unit 12, the pool plate heat exchanger, and the underfloor heating system. This system's operating temperature range can differ from the main air conditioning water system, and it is a relatively independent closed-loop system; therefore, it requires a separate expansion device to accommodate the volume changes of its internal working fluid. Compared to the entire system sharing a single expansion tank 28, this solution configures two separate expansion tanks 28 for two circulation loops with different hydraulic characteristics and operating conditions, resulting in more precise and safer pressure control and more stable system operation.

[0130] Specifically, in this embodiment, the specific selection and combination of the modular units achieves flexible matching and high reliability of cooling and heating loads. The two chilled and hot water heat pump units 271 can serve as backups for each other, or they can be put into operation in stages according to the load size, providing most of the chilled and hot water required for air conditioning cooling and auxiliary heating.

[0131] The air source heat pump unit 272 serves as a highly efficient heat source supplement, especially in winter when the ambient temperature is low. Its heating efficiency may be better than that of some hot and cold water heat pumps. It is specifically designed to provide stable heat to the insulated water tank 26, underfloor heating and pool water heating.

[0132] These three units are connected by pipelines and valve groups. The main control system can make intelligent decisions on the start-up, shutdown, operation mode and output ratio of each unit based on multiple signals such as outdoor meteorological parameters, pool water temperature, lobby humidity and air-conditioned area temperature, so as to maximize the system's energy efficiency throughout the year.

[0133] Compared to using a single type or a single large-capacity main unit, this solution adopts a modular, multi-head, and multi-type unit combination, which has comprehensive advantages such as high partial load efficiency, flexible operation and scheduling, convenient maintenance, and extremely high system reliability.

[0134] The workflow of the system described in this invention is illustrated below with reference to specific implementation methods:

[0135] After the system starts up, the variable frequency dehumidifier 1 is put into operation first. Warm, humid air in the pool hall is drawn into the airflow channel inside the unit housing by a fan and through a return air mechanism. This airflow is forced through the evaporator coil of the dehumidifier heat pump unit 12. Because the surface temperature of the coil is lower than the air dew point temperature, water vapor in the air quickly condenses and precipitates, achieving dehumidification. Simultaneously, the refrigerant absorbs the latent heat of vaporization of this air and evaporates in the evaporator. Subsequently, the gaseous refrigerant is drawn in and compressed by the variable frequency compressor, becoming a high-temperature, high-pressure gas, which enters the condenser. In the condenser, the high-temperature refrigerant gas releases the heat it carries (including the absorbed latent heat of vaporization and the heat converted from compression work). This released high-temperature condensation heat is used, on the one hand, to heat the air flowing through the condenser coil, making it dry, warm air, which is then delivered into the pool hall by the fan through the duct; on the other hand, it is transferred to the pool circulating water flowing on the other side of the plate heat exchanger 21, which is connected to the condenser water circulation circuit, thereby continuously heating the pool water.

[0136] Meanwhile, the variable air volume (VAV) regulating device 3 begins operation. The air volume control units installed at the inlets of the air supply branches in each area of ​​the pool hall, based on real-time data fed back by their monitoring components 36 (such as air volume monitors 361 and area humidity sensors), drive the damper actuators within the regulating air box 32 via the first controller 35 to dynamically adjust the opening of the dampers in each branch. For example, when an increase in humidity is detected in a certain area, the controller will increase the opening of the air supply damper in that area, increasing the volume of dry air delivered to quickly offset the moisture load; conversely, it will decrease the opening to achieve energy savings for the fans while ensuring stable environmental parameters.

[0137] The pool water thermostat 2 operates its water circulation independently. Pool water is drawn by the filter circulation pump 232 through the bottom return inlet and first enters the filter 233 (such as a quartz sand filter 233) of the circulation filtration unit for physical purification to remove suspended particles. Subsequently, the purified pool water flows into the secondary side of the plate heat exchanger 21, where it undergoes non-contact heat exchange with the primary side heat medium from the dehumidification heat pump, absorbing condensation heat and increasing in temperature. The heated pool water then returns to the pool through inlets evenly distributed on the pool walls or bottom, completing one heating cycle. The water purification unit integrated in this loop analyzes water samples in real time through an online water quality monitor 241 and automatically controls the precise addition of disinfectants (such as sodium hypochlorite) and pH adjusters to maintain the chemical balance of the water.

[0138] The system of this invention possesses multi-condition adaptive capability. In summer, under high temperature and humidity conditions, the combined air handling unit 15 will undertake the primary air cooling and dehumidification tasks. At this time, the second controller adjusts the air valves, allowing most of the return air to enter the surface cooling section of the unit for conventional cooling and dehumidification, while the dehumidifying heat pump unit 12 may operate at a reduced frequency or as an auxiliary unit. This aims to meet dehumidification requirements while optimizing the overall system energy efficiency. In winter or transitional seasons with high humidity conditions, the control system switches the air valve path, guiding most of the return air into the dehumidifying heat pump unit 12, fully utilizing its high-efficiency dehumidification and heat recovery advantages for hall air reheating and pool water heating. The pool bottom underfloor heating circulation loop can, as needed, be switched via valves to connect to the dehumidifying heat pump heat medium loop or the modular unit heat source, providing auxiliary radiant insulation to the pool bottom and reducing heat loss.

[0139] In addition, the modular units serve as a supplementary heat source, providing chilled water to the combined air handling unit 15 in summer to cope with peak cooling loads, and switching to heating mode in winter. Through the piping system, they provide auxiliary or backup heat sources to the insulated water tank 26, each swimming pool sub-circulation system, and the underfloor heating circuit, ensuring heating reliability under all operating conditions. The fan coil unit air conditioning branches serving other functional areas independently obtain chilled and hot water from the modular units, achieving independent temperature control decoupled from the pool lobby environmental control system.

[0140] The entire workflow is coordinated and managed by distributed controllers (such as frequency converters, first controller 35, second controller, third controller, etc.) and a central monitoring system. They process signals from various sensors (temperature, humidity, flow rate, water quality, pressure) in real time, execute preset control algorithms, and dynamically adjust compressor frequency, water pump speed, air valve and water valve opening, equipment start and stop, etc., ultimately achieving fully automatic, high-efficiency, integrated intelligent constant control of air temperature and humidity, pool water temperature and water quality in the pool hall.

[0141] The entire system constitutes a closed-loop ecosystem that features tiered energy utilization, precise load matching, and optimized operation strategies.

[0142] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A variable air volume swimming pool frequency conversion dehumidification and pool water constant temperature system, characterized in that: It includes a variable frequency dehumidifier (1), a pool water constant temperature device (2), and a variable air volume regulating device (3); The variable frequency dehumidification device (1) includes a box with an air flow channel and a dehumidification heat pump unit (12) installed in the box. The dehumidification heat pump unit (12) is configured to dehumidify the warm and humid air flowing through the air flow channel and then deliver it to the pool hall, and recover the condensation heat generated during the dehumidification process. The pool water constant temperature device (2) includes a heat exchanger (21) used in conjunction with the pool circulating water. The heat exchanger (21) is connected to the corresponding heat exchange component in the dehumidification heat pump unit (12) through a heat medium pipeline to transfer the recovered condensation heat to the pool circulating water. The variable air volume regulating device (3) is located between the air flow channel of the variable frequency dehumidification device (1) and the pool hall. The variable air volume regulating device (3) has an air volume control unit for regulating the air volume supplied by the dehumidification heat pump unit (12) to the pool hall. The variable frequency dehumidification device (1), the pool water constant temperature device (2) and the variable air volume regulating device (3) are used together to ensure that air dehumidification and pool water heating work together to maintain the constant humidity and pool water temperature in the pool hall. The air volume control unit is located at the connection point between the main air supply pipe and multiple regional air supply branch pipes downstream of the air flow channel. The air volume control unit includes a regulating air box (32) with an air inlet and an air outlet, a first air valve (33) rotatably disposed inside the regulating air box (32), a rotary driver (34) for driving the first air valve (33) to rotate, and a first controller (35) disposed outside the regulating air box (32); the first air valve (33) is configured to cooperate with the air outlet of the regulating air box (32), the air inlet of the regulating air box (32) is connected to the main air supply pipe, and the first controller (35) is electrically connected to the rotary driver (34) for adjusting the opening degree of the first air valve (33); The air volume control unit also includes a monitoring component (36), which includes an air volume monitor (361) and a second humidity sensor (362) installed at the air outlet of the regulating air box (32). The second humidity sensor (362) is used to monitor the moisture content of the gas output by the regulating air box (32) and generate a moisture content signal, which is then sent to the first controller (35). The air volume monitor (361) is used to monitor the total amount of gas output by the regulating air box (32) within a preset time period and generate a total gas amount signal, which is then sent to the first controller (35). The first controller (35) adjusts the operation of the rotary drive (34) according to the moisture content signal and the total gas amount signal to change the opening degree of the first air valve (33).

2. The variable air volume swimming pool frequency conversion dehumidification and pool water constant temperature system according to claim 1, characterized in that: The dehumidifying heat pump unit (12) includes a first return air mechanism (121), a first exhaust air mechanism (122), a first heat exchange mechanism (123), a first fresh air mechanism (124), and a first air supply mechanism (125) arranged in sequence. The first heat exchange mechanism (123) includes an evaporator, a condenser, a compressor, and a frequency converter for driving the compressor. The warm and humid air generated in the pool is drawn in through the first return air mechanism (121) and then dehumidified or heated by the first heat exchange mechanism (123) before being delivered to the first air supply mechanism (125). The first air supply mechanism (125) delivers the dry and hot air formed after the warm and humid air is dehumidified or heated to the pool hall for air heating or pool circulating water heating.

3. The variable air volume swimming pool frequency conversion dehumidification and pool water constant temperature system according to claim 2, characterized in that: The variable frequency dehumidification device (1) further includes a variable frequency controller electrically connected to the variable frequency drive and a first humidity sensor electrically connected to the variable frequency controller. The first humidity sensor is installed at the first return air mechanism (121) of the pool hall and / or the dehumidification heat pump unit (12) to collect the humidity signal of the air in the pool hall and feed it back to the variable frequency controller. The variable frequency controller is configured to adjust the speed of the compressor according to the humidity signal to adjust the air dehumidification amount and the condensation heat output.

4. The variable air volume swimming pool frequency conversion dehumidification and pool water constant temperature system according to claim 1, characterized in that: The variable frequency dehumidification device (1) also includes a combined air handling unit (15) installed in parallel with the dehumidification heat pump unit (12) inside the housing. The combined air handling unit (15) includes a second return air mechanism (151), a second exhaust air mechanism (152), a second fresh air mechanism (153), a second heat exchange mechanism (154), and a second air supply mechanism (155). The second return air mechanism (151) is connected to the first return air mechanism (121) through a second air valve. The second heat exchange mechanism (154) includes an air mixing section, a filtration section, and a surface cooling section. The air mixing section is provided with a second fresh air inlet, a second return air inlet, and a third air valve. The surface cooling section is used to cool and dehumidify the air under summer operating conditions. The second air valve is electrically connected to a second controller, which is configured to: in summer operating conditions, control the second air valve to reduce or close the opening to the dehumidifying heat pump unit (12); in winter or high humidity operating conditions, control the second air valve to increase the opening to the dehumidifying heat pump unit (12).

5. The variable air volume swimming pool frequency conversion dehumidification and pool water constant temperature system according to claim 1, characterized in that: The pool water constant temperature device (2) also includes a constant temperature pool (22) and a circulating filtration unit; the heat exchanger (21) is a plate heat exchanger (21), and the heat recovered by the dehumidifying heat pump unit (12) heats the pool water in the constant temperature pool (22) through the plate heat exchanger (21); the circulating filtration unit includes a return water pipe (231), a filter circulating water pump (232), a filter (233), and a filter supply water pipe (234) that cooperate with the constant temperature pool (22). The return water pipe (231) is connected to the filter circulating water pump (232) to send the pool water into the filter (233) for filtration. The pool water filtered by the filter (233) is reused in the constant temperature pool (22) through the filter supply water pipe (234).

6. The variable air volume swimming pool frequency conversion dehumidification and pool water constant temperature system according to claim 5, characterized in that: The pool water constant temperature device (2) also includes a water purification unit; the water purification unit includes a water quality monitor (241), a chlorine disinfectant dosing device (242) and a pH adjuster dosing device (243). The water quality monitor (241) is connected to the chlorine disinfectant dosing device (242) and the pH adjuster dosing device (243) through a pipeline to adjust the dosage of chlorine disinfectant and pH adjuster according to the pH value and residual chlorine parameters of the pool water in the constant temperature pool (22) so that the water quality of the pool water in the constant temperature pool (22) remains stable.

7. The variable air volume swimming pool frequency conversion dehumidification and pool water constant temperature system according to claim 6, characterized in that: The bottom of the constant temperature swimming pool (22) is provided with a functional composite layer (221) and a load-bearing heat insulation layer (222) from top to bottom. The functional composite layer (221) includes an anti-slip surface layer (2211), a plain cement slurry bonding layer (2212), and a cast-in-place concrete layer (2213). The load-bearing heat insulation layer (222) includes a floor heating pipe layer (2221), a heat insulation layer (2222), a concrete cushion layer (2223), and a compacted soil layer (2224) located below the cast-in-place concrete layer (2213). Multiple heating pipes are laid in the floor heating pipe layer (2221), and the heating pipes are connected to the heat exchange components of the dehumidifying heat pump unit (12).

8. The variable air volume swimming pool frequency conversion dehumidification and pool water constant temperature system according to claim 7, characterized in that: The side wall of the constant temperature swimming pool (22) is provided with a boundary insulation strip (223), which includes a polystyrene strip layer (2231), a plaster layer (2232) and an outer wall (2233) arranged sequentially from the inside to the outside.

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