A dehumidifying heat pump unit with the function of detecting chlorine gas and carbon dioxide

Abstract

The present invention relates to the technical field of dehumidification heat pumps, and particularly discloses a dehumidification heat pump unit with chlorine and carbon dioxide detection functions, which includes a chassis, an air inlet device, a fresh air device, an exhaust device, a heat exchange device, and a air supply device provided on the chassis, and also includes a PLC control system and an integrated gas detection device electrically cooperating with the PLC control system; the integrated gas detection device is used in cooperation with the air inlet device and the heat exchange device, the integrated gas detection device includes a chlorine detection module and a carbon dioxide detection module, and the heat exchange device includes a compressor, an evaporator, and a condenser; the PLC control system is electrically connected to the integrated gas detection device, the compressor, the fresh air device, and the exhaust device, and is used to receive the chlorine and carbon dioxide concentration signals detected by the chlorine detection module and the carbon dioxide detection module. When the chlorine concentration or the carbon dioxide concentration exceeds the preset threshold, the fresh air device is adjusted to increase the fresh air introduction amount and the exhaust device is started to accelerate the discharge of the waste gas in the swimming pool.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidification heat pumps, and in particular discloses a dehumidification heat pump unit with chlorine and carbon dioxide detection functions. Background Art

[0002] Most of the energy loss in the swimming pool is due to the evaporation of pool water, and this energy exists in the pool environment as humid air containing chlorine and carbon dioxide. If the humidity is not effectively controlled, it will cause condensation on the surfaces such as the ceiling and walls, accelerate the corrosion of decorative materials, and even cause discomfort to the human body in severe cases. In addition, high-concentration chlorine will corrode the equipment pipeline, and the accumulation of carbon dioxide is harmful to human health. There are significant defects in the conventional "exhausting moisture + introducing fresh air" mode in the prior art: in winter, it is necessary to additionally heat the fresh air and the pool water, and in summer, it is necessary to cool and dehumidify the fresh air, resulting in high operating costs due to double energy consumption.

[0003] The following technical problems exist in the prior art: traditional heat pumps only focus on temperature and humidity adjustment, do not recover latent heat, and do not design purification modules for chlorine and carbon dioxide pollution in the swimming pool, resulting in the superposition of equipment corrosion and energy consumption; conventional dehumidification systems lack chlorine / carbon dioxide detection and dynamic air volume control functions and cannot reduce the concentration of harmful gases in real time; the chlorine-containing condensate water generated by the evaporator is directly discharged, which not only wastes water resources but also pollutes the environment. Summary of the Invention

[0004] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the present invention is to provide a dehumidification heat pump unit with chlorine and carbon dioxide detection functions to solve the technical problem that conventional dehumidification systems lack chlorine / carbon dioxide detection and dynamic air volume control functions and cannot reduce the concentration of harmful gases in real time.

[0005] To achieve the above purpose, a dehumidification heat pump unit with chlorine and carbon dioxide detection functions of the present invention includes a chassis, an air inlet device, a fresh air device, an exhaust device, a heat exchange device, and a air supply device provided on the chassis, and also includes a PLC control system and an integrated gas detection device electrically cooperating with the PLC control system; the integrated gas detection device is used in cooperation with the air inlet device and the heat exchange device, the integrated gas detection device includes a chlorine detection module and a carbon dioxide detection module, the heat exchange device includes a compressor, an evaporator, and a condenser, the warm and humid air generated in the swimming pool is inhaled through the air inlet device and then undergoes dehumidification or heating treatment through the compressor, the evaporator, and the condenser and is then conveyed to the air supply device, and the air supply device conveys the dry and hot air formed after dehumidifying or heating the warm and humid air to the room associated with the swimming pool for heating or for heating the pool water;

[0006] The PLC control system is electrically connected to the integrated gas detection device, the compressor, the fresh air device, and the exhaust device respectively. The PLC control system is used to receive the chlorine and carbon dioxide concentration signals detected by the chlorine detection module and the carbon dioxide detection module. When the chlorine concentration or the carbon dioxide concentration exceeds the preset threshold, the PLC control system regulates the fresh air device to increase the fresh air intake and simultaneously starts the exhaust device to accelerate the discharge of the waste gas in the swimming pool.

[0007] Further, a rotatable sampling air duct is provided on one side of the integrated gas detection device. The sampling air duct is provided with a guide vane driven by a micro stepping motor, and the opening angle of the guide vane is linked and controlled with the fan speed. The PLC control system dynamically adjusts the deflection angle of the guide vane by analyzing the wind speed difference between the air inlet device and the exhaust device, so as to form a mixed air flow state of turbulence and laminar flow in the detection area, ensuring that the gas detection module can still maintain a detection accuracy of ±5% when the wind speed changes suddenly. This structure solves the problem of sampling distortion of traditional fixed detection ports under variable air volume conditions.

[0008] Further, both the fresh air device and the exhaust device adopt variable frequency fans for air flow exchange. The PLC control system dynamically adjusts the speed of the variable frequency fans according to the concentration of chlorine or carbon dioxide, and satisfies the following conditions:

[0009] When the chlorine concentration exceeds the preset threshold, control the exhaust fan of the fresh air device to increase the power and increase the fresh air volume to 120%-150% of the rated air volume;

[0010] When the carbon dioxide concentration exceeds the preset threshold, control the exhaust fan of the exhaust device to increase the power and increase the exhaust air volume to 130%-180% of the rated air volume;

[0011] The difference between the fresh air volume and the exhaust air volume is within ±10% to maintain the air pressure balance inside and outside the swimming pool.

[0012] Further, the chlorine detection module adopts an electrochemical sensor with a detection accuracy of 0.1-10 ppm; the carbon dioxide detection module adopts a non-dispersive infrared sensor with a detection accuracy of ±50 ppm.

[0013] Further, the gas detection device can adopt a distributed detection layout, and chlorine and carbon dioxide sensors are respectively installed at multiple key points in the first chamber (air inlet chamber), the third chamber (exhaust chamber) of the chassis and the swimming pool area, and are connected to the PLC control system by wired or wireless means, so that the system can accurately identify the chlorine concentration distribution and precisely adjust the ventilation strategy.

[0014] Further, a plurality of partition plates are provided inside the chassis. The plurality of partition plates sequentially divide the internal space of the chassis into a first chamber, a second chamber, a third chamber, a fourth chamber, and a fifth chamber that are interconnected. The air inlet device, the fresh air device, the exhaust device, the heat exchange device, and the air supply device are respectively arranged in the first chamber, the second chamber, the third chamber, the fourth chamber, and the fifth chamber;

[0015] The air inlet device includes a first air outlet opened in the first chamber and communicating with the inside of the pool, and a first fan arranged in cooperation with the first air outlet; the fresh air device includes a second air outlet opened in the second chamber and a second fan arranged in cooperation with the second air outlet; the exhaust device includes a third air outlet opened in the third chamber and a third fan arranged in cooperation with the third air outlet, and the air supply device includes a fourth air outlet and a fourth fan arranged in cooperation with the fourth air outlet.

[0016] Further, a dynamic air flow regulating device is provided between the first chamber (air inlet chamber) and the third chamber (exhaust chamber) of the chassis. The device adopts a multi-stage louver damper, which can intelligently adjust the opening degree according to the chlorine concentration, humidity, and CO2 concentration, reduce energy consumption loss while ensuring ventilation and air change, and improve the overall heat recovery efficiency.

[0017] Further, the second air outlet is communicated with the fourth air outlet via the heat exchange device. A first filter module is provided between the second air outlet and the evaporator. The first filter module includes a plate type primary filter and an activated carbon composite filter layer. The outside air enters the heat exchange device for treatment through the primary filter and the activated carbon composite filter layer in sequence.

[0018] Further, an air flow balance control module is provided between the second fan of the fresh air device and the third fan of the exhaust device. Based on the difference in the air volume of fresh air and exhaust air calculated by the PLC control system, the module dynamically adjusts the rotation speeds of the fresh air fan and the exhaust air fan so that the air volume difference is always maintained within ±5%, to ensure the air pressure balance inside and outside the pool area and prevent the backflow of external pollutants or the leakage of pool moisture.

[0019] Further, a second filter module is provided between the first air outlet and the evaporator. The second filter module has the same structure as the first filter module, and the activated carbon composite filter layer has a honeycomb activated carbon structure.

[0020] Further, the thickness of the activated carbon composite filter layer is 50 - 80 mm, which is used to assist in adsorbing chlorine and volatile organic compounds generated by the pool.

[0021] Further, a pulse backwashing device is arranged below the activated carbon composite filter layer. The pulse backwashing device includes a high-pressure air pump and a nozzle array. When the differential pressure sensor detects that the differential pressure before and after the filter layer is ≥ 50 Pa, the PLC control system starts the high-pressure air pump to backwash the filter layer at a pressure of 0.5 MPa, and the dirt is collected in the detachable waste box.

[0022] Further, the evaporator is arranged on one side close to the air supply device. The refrigerant outlet of the evaporator is connected to the suction port of the compressor via a low-pressure suction pipe, and the exhaust port of the compressor is connected to the refrigerant inlet of the condenser via a high-pressure exhaust pipe. The heat exchange device further includes a water receiving tray for receiving the condensed water of the evaporator and the condenser. The bottom of the water receiving tray is connected with a drainage pump. The water inlet end of the drainage pump is located in the water receiving tray, and the drainage end of the drainage pump is connected to the water inlet end of the condenser.

[0023] Further, a water quality purification module for filtering chloride ions and impurities in the condensed water is arranged between the drainage end of the drainage pump and the water inlet end of the condenser. The condensed water purified by the water quality purification module is injected into the pool heating pipeline as an auxiliary heat source through an external circulation pump. The water quality purification module includes an ion exchange unit, an ultrafiltration membrane unit and an ultraviolet sterilization unit which are connected in series. The chloride ion concentration of the purified condensed water is ≤ 1 ppm.

[0024] Further, a phase change material energy storage unit is arranged downstream of the condenser. The phase change material is a shaped phase change material composed of calcium chloride hexahydrate and graphene, and the phase change temperature is set at 28 - 32 °C. The energy storage unit is respectively connected to the fresh air duct and the pool water circulation pipeline through a switchable pipeline. When it is detected that it is a low electricity price period at night or the pool is closed, the PLC control system stores the condensation waste heat in the phase change material and preferentially releases heat to the fresh air preheating section or the pool water auxiliary heating section during the peak period of the next day. This technical solution realizes the time-shifted utilization of heat energy, and the energy-saving efficiency is increased to more than 40% compared with the traditional heat recovery system.

[0025] Further, a hot water storage tank is arranged downstream of the water quality purification module. The hot water storage tank is respectively connected to the water inlet end of the condenser, the pool heating pipeline and the external drainage pipe through a three-way valve. A water temperature sensor is arranged at the water outlet end of the hot water storage tank, and a condensed water flow sensor is arranged at the water inlet end of the condensed water.

[0026] The PLC control system is configured as follows:

[0027] Dynamically adjust the opening degree of the three-way valve according to the data of the condensed water flow sensor and the water temperature sensor;

[0028] When the priority of the pool heating demand is higher than the condenser cooling, preferentially transport the purified condensed water to the pool heating pipeline;

[0029] When the water level in the hot water storage tank (100) is ≥90%, the external drain pipe is activated to discharge excess condensed water.

[0030] Furthermore, an anti-backflow solenoid valve is provided at the inlet of the swimming pool heating pipeline, and the solenoid valve is electrically controlled with the PLC control system to open only when the water quality monitoring is qualified.

[0031] Furthermore, the integrated gas detection device also includes a self-calibration unit and a backup sensor. The self-calibration unit has a built-in standard gas source, which automatically performs zero point and span standards on the chlorine detection module and the carbon dioxide detection module during a preset period of time every day (which may be during the closing period of the swimming pool); when the detection value of the main sensor exceeds the tolerance for ≥3 times in a row, the PLC control system switches to the backup sensor and triggers a maintenance alarm.

[0032] Furthermore, a multi-layer composite protective shell is arranged around the chlorine gas detection module and the carbon dioxide detection module of the integrated gas detection device, including:

[0033] The outer layer is a PTFE hydrophobic breathable membrane with a contact angle of >150° and a pore size of ≤0.2μm, which allows gas molecules to pass through but blocks liquid water;

[0034] The middle layer is a honeycomb-shaped diversion cavity, the inner wall of the cavity is coated with a nano-silicon dioxide moisture-proof coating, and the bottom of the cavity is provided with an inclined drainage microchannel;

[0035] The inner layer is an aluminum alloy sealed cavity with an air pressure balance valve, and a calcium chloride desiccant bag is built into the cavity;

[0036] The diversion cavity is linked to the fan start and stop signal of the PLC control system. When the fan stops, the air pressure balance valve automatically closes to form a negative pressure sealing state. This structure ensures gas permeability while achieving IP68 waterproof and chlorine corrosion resistance.

[0037] Furthermore, the PLC control system is connected to the swimming pool flow monitoring system to adjust the compressor, fresh air and exhaust air ratios according to real-time flow data; when the flow rate is greater than 50 people / hour, the compressor frequency is increased to 90%-100%, and the fresh air volume is increased to 130% of the rated value; when the flow rate is less than 10 people / hour, the compressor frequency is reduced to 40%, and the fresh air volume is maintained at 80% of the rated value.

[0038] Furthermore, the dehumidification heat pump unit also includes an intelligent defrost device, which includes a temperature sensor arranged on the surface of the fins of the condenser and a PTC heating element arranged on one side of the condenser body. The PLC control system is used to receive the surface temperature signal of the condenser detected by the temperature sensor and control the PTC heating element to perform heating and defrosting operations.

[0039] Furthermore, when the temperature sensor detects that the surface temperature of the condenser is ≤ 2°C and lasts for 10 minutes, or detects that the temperature difference between the evaporator and the condenser is ≥ 15°C, the PLC control system starts the PTC heating element and heats up to 8°C at a rate of 2°C / min, while reducing the compressor power to 50%.

[0040] Furthermore, the condenser of the heat exchange device adopts a double-loop heat exchange structure, where the first loop is used for air heating, the second loop is connected to the pool heating pipeline, and indirectly heats the pool water through the heat exchange coil. The PLC control system automatically adjusts the heat exchange power distribution of each loop according to the ambient temperature and humidity, pool water temperature, and indoor air quality, so as to achieve the optimal energy efficiency matching among dehumidification, air heating, and water heating.

[0041] Furthermore, the dehumidification heat pump unit also includes a quick-release connector used in conjunction with the integrated gas detection device. The quick-release connector includes a mounting bracket and a magnetic fixing seat arranged at the bottom of the mounting bracket. The mounting bracket is provided with a guide rail and chute structure. The integrated gas detection device is slidably connected to the magnetic fixing seat via the guide rail and chute structure of the mounting bracket, and the mounting bracket is installed at the air inlet of the air inlet device and the heat exchange device via the magnetic fixing seat.

[0042] Furthermore, an elastic sealing ring is provided on the contact surface between the magnetic fixing seat and the air inlet, and an anti-detachment locking buckle is provided on the side wall of the mounting bracket. After the integrated gas detection device is inserted into the mounting bracket through the guide rail and chute, it rotates 90° to trigger the anti-detachment locking buckle for fixation.

[0043] Furthermore, a photovoltaic panel is provided on the top of the chassis, and the photovoltaic panel is connected to the power supply circuits of the compressor and the fan through an inverter; the PLC control system preferentially uses photovoltaic energy to drive the compressor according to the real-time electricity price data and the photovoltaic power generation, and the remaining electric energy is stored in the battery for night use.

[0044] Furthermore, the following structures are set for the main control board of the PLC control system and the variable-frequency fan drive circuit:

[0045] Three-dimensional stereoscopic potting layer: Adopt a composite potting material of modified epoxy resin and silica gel to coat the circuit board and connectors, and its volume resistivity > 1×10¹ 6 Ω·cm

[0046] Distributed humidity sensor array: Embedded in the key nodes inside the potting layer to monitor the relative humidity inside the package in real time;

[0047] Micro PTC heating wire: Laid at the gap between the potting layer and the shell, and automatically starts heating and dehumidifying when the detection value of any humidity sensor > 60%RH;

[0048] Redundant grounding terminal: Made of titanium alloy, it is connected to the lightning protection grounding system of the chassis through multi-point equipotential connection;

[0049] This system enables electrical components to still meet the IEC 60529 waterproof standard in a continuous damp and hot environment of 95% RH, and avoids insulation failure caused by condensation.

[0050] Furthermore, the PLC control system of the unit has remote monitoring and data recording functions, and is connected to the pool management system or cloud server through a wireless communication module (Wi-Fi or LoRa) to realize remote monitoring of the operating status of equipment, storage and intelligent analysis of air quality data, and provide early warnings and maintenance suggestions.

[0051] Furthermore, a neural network model trained by transfer learning is embedded in the PLC control system. The model uses chlorine concentration, carbon dioxide concentration, ambient temperature and humidity, and personnel density in historical operation data as input features, and outputs a three-dimensional control parameter combination of the optimal fresh air - exhaust air volume ratio, compressor frequency, and guide vane angle; the system is equipped with an online self-learning module, which continuously optimizes the model weights by collecting abnormal working condition data during peak / low peak periods of swimmers in real time. This algorithm breaks through the linear regulation limitation of traditional PID control, and the response speed under sudden high-load working conditions is 2.3 times faster than that of conventional systems.

[0052] The present invention inhales the warm and humid air containing chlorine and carbon dioxide in the pool through an air inlet device, dehumidifies and cools it through an evaporator, and then the condenser recovers the latent heat to heat the air or the pool water. The processed dry and hot air is returned to the pool through a air supply device. The integrated gas detection device monitors the concentration of harmful gases in real time, and the PLC control system dynamically adjusts the variable-frequency fresh air / exhaust air volume to dilute pollutants, and realizes efficient heat recovery and stable operation of the system through compressor frequency conversion, condensate water circulation, and intelligent defrosting.

[0053] The beneficial effects of the present invention: Recover the evaporation latent heat, reduce the redundant energy consumption of the traditional "heating + air conditioning" mode, and the comprehensive energy efficiency is increased by more than 30%; Dual gas detection and linkage air volume control to maintain the safe range of chlorine / CO2 concentration, the activated carbon filter layer adsorbs VOCs to purify the air quality; The condensate water circulation utilization reduces water consumption, the PTC precise defrosting avoids icing damage, and the quick-disassembly detection module reduces the maintenance cost; The chamber separation and modular design reduce air flow interference, and the air pressure balance control prolongs the equipment life. Description of the Drawings

[0054] Figure 1 It is a schematic diagram of the overall structure of the dehumidification heat pump of the present invention;

[0055] Figure 2 It is a schematic diagram of the structure of the dehumidification heat pump of the present invention after removing part of the casing;

[0056] Figure 3 Schematic diagram of the structure inside the sixth chamber of the present invention;

[0057] Figure 4 Schematic diagram of the installation positions of the water receiving tray and the drainage pump of the present invention;

[0058] Figure 5 Schematic diagram of the structures of the air inlet device, fresh air device, and exhaust air device of the present invention;

[0059] Figure 6 Schematic diagram of the structure of the first filter module of the present invention;

[0060] Figure 7 Schematic diagram of the cooperative installation of the integrated gas detection device and the quick-release connector of the present invention;

[0061] Figure 8 This Figure 7 Enlarged schematic diagram of part A in this.

[0062] Reference numerals include:

[0063] 1, chassis; 2, air inlet device; 5, heat exchange device; 6, air supply device; 7, PLC control system; 8, integrated gas detection device; 9, quick-release connector; 10, partition; 11, first chamber; 12, second chamber; 121, louver damper; 13, third chamber; 14, fourth chamber; 15, fifth chamber; 16, sixth chamber; 21, first air outlet; 22, first fan; 31, second air outlet; 41, third air outlet; 51, compressor; 52, evaporator; 53, condenser; 54, surface cooler; 55, first filter module; 551, plate type primary filter; 552, activated carbon composite filter layer; 57, water receiving tray; 58, drainage pump; 581, drainage pump water inlet end; 582, drainage pump water drainage end; 61, fourth air outlet; 62, fourth fan; 81, chlorine detection module; 82, carbon dioxide detection module; 91, mounting bracket; 92, magnetic absorption fixing seat; 93, guide rail and chute structure; 911, rod body; 931, chute; 932, roller. Specific embodiments

[0064] For the convenience of those skilled in the art, the present invention will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the embodiments does not limit the present invention.

[0065] Please refer to Figures 1 to 8As shown, a dehumidification heat pump unit with chlorine and carbon dioxide detection functions of the present invention monitors the swimming pool environment data in real time through an integrated gas detection device 8 (including an electrochemical chlorine sensor and an infrared CO2 sensor), and the detection signal is transmitted to the PLC control system 7. When the chlorine or CO2 concentration exceeds the standard, the PLC controls the variable frequency fresh air fan (the air volume is increased to 120%-150% of the rated value) and the exhaust fan (the air volume is increased to 130%-180%), and synchronously adjusts the power of the compressor 51 to maintain the indoor and outdoor pressure difference of ±10%; after the warm and humid air is dehumidified by the evaporator 52, the condensed water is purified by ion exchange resin, ultrafiltration membrane and ultraviolet sterilization and reused for pool water heating; the condenser 53 adopts a double-circuit design, the first circuit heats the air, and the second circuit indirectly heats the pool water through the heat exchange coil, and the PLC dynamically allocates the heat exchange priority according to the environmental parameters. The gas detection module is installed with a quick-release magnetic rail, supports automatic switching of the main and standby sensors, and the activated carbon filter layer is equipped with a pulse backflush device, which triggers 0.5MPa high-pressure cleaning when the pressure difference is ≥50Pa. The dual-gas detection is linked to the variable-frequency fan to solve the problem that the traditional system cannot dynamically adjust the exhaust gas concentration; the condensate recycling and dual-circuit heat exchange design improve the comprehensive energy efficiency ratio (COP) by more than 30%; the modular detection device and self-cleaning filtration system reduce the manual maintenance cost by 50%.

[0066] Specifically, in this embodiment, a rotatable sampling air duct is added to the integrated gas detection device 8, and the sampling air duct 83 is provided with a guide vane driven by a micro-stepping motor, and the opening angle of the guide vane is linked to the fan speed; the PLC control system 7 dynamically adjusts the deflection angle of the guide vane by analyzing the wind speed difference between the air inlet device 2 and the exhaust device, so that the detection area forms a mixed airflow state of turbulent and laminar flow, ensuring that the gas detection module can still maintain a detection accuracy of ±5% when the wind speed changes suddenly. This structural design solves the sampling distortion problem of the traditional fixed detection port under variable air volume conditions.

[0067] Specifically, the chassis 1 is divided into five chambers (first to fifth chambers 1-5) by a plurality of partitions 10, corresponding to the air intake, fresh air, exhaust air, heat exchange and air supply device 6 respectively. In this embodiment, a sixth chamber 16 is further divided by a partition 10 on one side of the air supply device 6, and the compressor 51, the control cabinet of the PLC control system 7 and part of the drainage pump 58 are all located in the sixth chamber 16, wherein:

[0068] The first chamber 11 (air inlet): is provided with a first air outlet 21 and a first fan 22, which is directly connected to the interior of the swimming pool and is responsible for inhaling warm and humid air containing chlorine and carbon dioxide.

[0069] The second chamber 12 (fresh air): introduces external fresh air through the second air outlet 31 and the second fan to form an air flow complementary to the air inlet chamber to avoid the backflow of pollutants.

[0070] The third chamber 13 (exhaust): equipped with a third fan and air outlet to discharge high-concentration exhaust gas and work in conjunction with the fresh air device to maintain air pressure balance (difference ±10%).

[0071] The fourth chamber 14 (heat exchange): has a built-in compressor 51, an evaporator 52 and a condenser 53, which completes air dehumidification, heating and heat energy recovery, and the condensed water is recycled through the purification module.

[0072] The fifth chamber 15 (air supply): The treated dry cold air or heated air is transported back to the swimming pool through the fourth fan 62, so as to realize the dual functions of temperature and humidity regulation and pool water heating.

[0073] This integrated layout allows each chamber to independently install core components (such as fans and heat exchangers), which is convenient for targeted disassembly during maintenance and reduces downtime; the chambers are connected to form a one-way airflow path to avoid cross-contamination between chlorine-containing humid air and fresh air, meeting the anti-corrosion requirements of the swimming pool environment; the chamber partitions can be adjusted in proportion according to the actual size of the machine room, for example, the heat exchange chamber (the fourth chamber 14) can be moved closer to the swimming pool hall, shortening the air supply duct to reduce energy consumption.

[0074] Specifically, a chlorine detection module 81 (electrochemical sensor, accuracy 0.1-10ppm) and a carbon dioxide detection module 82 (non-dispersive infrared sensor, accuracy ±50ppm) are deployed in the swimming pool area and the unit's air inlet / exhaust chamber (at the first air inlet of the first chamber 11 and the fourth air inlet of the fifth chamber 15) to collect concentration signals in real time and transmit them to the PLC control system 7.

[0075] The variable frequency fan linkage control is as follows:

[0076] Chlorine excess response: When the chlorine concentration exceeds the threshold (e.g. ≥1ppm), the PLC controls the variable frequency fan (second fan) of the fresh air device to increase the speed, so that the fresh air volume increases to 120%-150% of the rated value, accelerating the dilution of chlorine;

[0077] Response to excessive carbon dioxide: When the carbon dioxide concentration exceeds the standard (e.g. ≥1000ppm), the PLC will simultaneously increase the speed of the variable frequency fan (the third fan) of the exhaust device to 130%-180% of the rated value to enhance exhaust gas discharge.

[0078] Air volume difference closed-loop regulation: The difference between fresh air and exhaust air volume is monitored by a differential pressure sensor. The PLC uses a PID algorithm to dynamically adjust the fan speed to ensure that the air volume difference is always controlled within ±10% (for example, when the fresh air volume is 1500m³ / h, the exhaust air volume needs to be in the range of 1350-1650m³ / h) to prevent air pressure imbalance from causing pollutant backflow or moisture leakage.

[0079] Redundant Design and Calibration: Integrated with backup sensors and a self-calibration unit (built-in standard gas source), automatically calibrate the zero point and span of the main sensor during the daily closing period. When the main sensor has three consecutive out-of-tolerance readings, switch to the backup module and trigger a maintenance alarm.

[0080] Specifically, a dynamic air flow regulating device is provided between the second chamber 12 (fresh air chamber) and the third chamber 13 (exhaust air chamber) of the chassis 1. The dynamic air flow regulating device uses a multi-stage louver damper 121 (each stage of blade width is 50 mm, and the adjustable range of the spacing is 0 - 30 mm), and the opening and closing angle of the blades (0° - 90°) is driven by a stepper motor. The louver adjustment strategy with multi-parameter linkage reduces the ineffective ventilation energy consumption by 40% - 50% compared with the traditional fixed-opening damper; the body of the louver damper 121 is made of 316L stainless steel resistant to chlorine corrosion, and the blade surface is coated with a nano anti-corrosion coating. The PLC control system 7 receives the signals of the chlorine sensor (0.1 - 10 ppm), carbon dioxide sensor (±50 ppm), and humidity sensor (±3%RH) in real time, and dynamically adjusts the opening and closing degree based on the fuzzy PID algorithm (as follows):

[0081] High Pollution Mode: When the chlorine concentration ≥ 1 ppm or CO2 ≥ 1000 ppm, the louver opening and closing degree increases to 80% - 90%, giving priority to strengthening ventilation and air exchange;

[0082] Energy Saving Mode: When the pollutant concentration is below the threshold and the humidity ≤ 60%, the opening and closing degree drops to 30% - 50% to reduce the heat loss of fresh air;

[0083] Heat Recovery Optimization: By adjusting the air flow pressure difference between the inlet and exhaust chambers (controlled within ±50 Pa), guide the waste heat of the exhaust gas to be recovered by the heat exchange device 5, and the heat recovery efficiency is increased to more than 75%.

[0084] Specifically, in this embodiment, a first filter module 55 (located between the louver damper 121 and the evaporator 52) is provided between the second air outlet 31 (fresh air inlet) and the evaporator 52, and a second filter module is provided between the first air outlet 21 (return air inlet) and the evaporator 52 (installed at the opening of the partition 10 between the first chamber 11 and the second chamber 12). Both modules include a plate-type primary filter 551 (G4 grade, filtration efficiency ≥ 90%) and a honeycomb activated carbon composite filter layer 552 (thickness 50 - 80 mm, pore diameter 2 - 4 mm), and the activated carbon filter layer uses modified activated carbon particles impregnated with copper oxide, and the chlorine adsorption efficiency ≥ 95%. The double-stage filtration system improves the removal rate of chlorine and VOCs to more than 95%, avoiding equipment corrosion and air pollution.

[0085] After the fresh air and the return air currents intercept particles ≥5μm through the primary filters respectively, chlorine gas (0.1 - 10 ppm) and volatile organic compounds (TVOC ≤ 0.5 mg / m³) are adsorbed by the activated carbon layer, and the purified air enters the evaporator 52 for heat exchange treatment.

[0086] Specifically, an air volume difference sensor (accuracy ±2%) is set between the second fan of the fresh air device and the third fan of the exhaust device. The PLC dynamically adjusts the fan speed using the fuzzy PID algorithm based on the deviation between the difference value and the preset threshold (±5%). For example, when the fresh air volume is 3000 m³ / h and the exhaust air volume needs to be controlled in the range of 2850 - 3150 m³ / h, the motor frequency (20 - 60 Hz) is adjusted through the frequency converter to achieve dynamic balance.

[0087] A differential pressure sensor (range 0 - 100 Pa) is installed below the activated carbon filter layer. When the differential pressure before and after the filter layer is detected to be ≥50 Pa, the PLC triggers the high-pressure air pump (rated pressure 0.5 MPa) to drive the nozzle array (aperture 1 mm, spacing 50 mm) for pulse backwashing. The backwashing period is ≤30 seconds / time, and the dirt is collected through the diversion trough into the detachable waste box (volume 5 L), and the maintenance period is extended to 3 - 6 months.

[0088] Specifically, the evaporator 52 is installed close to the air supply device 6 (the fifth chamber 15). The refrigerant circulation path is: the outlet of the evaporator 52 → the low-pressure suction pipe (Φ25 mm copper pipe) → the suction port of the compressor 51 → the discharge port of the compressor 51 → the high-pressure discharge pipe (Φ32 mm copper pipe) → the inlet of the condenser 53, forming a closed refrigeration cycle.

[0089] The condensed water of the evaporator 52 and the condenser 53 is collected by the water receiving tray 57 (made of 304 stainless steel, with an inclination angle of 5°), and then transported to the water purification module by the drain pump 58 (flow rate 1 m³ / h). The water inlet end of the drain pump 58 is connected to the inside of the water receiving tray 57, and the water outlet end of the drain pump 58 is connected to the water inlet end of the condenser 53.

[0090] A water purification module for filtering chloride ions and impurities in the condensed water is provided between the water outlet end of the drain pump 58 and the water inlet end of the condenser 53. The water purification module is sequentially configured with an ion exchange unit (strong acid type, Cl⁻ exchange capacity ≥2 mmol / g), an ultrafiltration membrane unit (cut-off molecular weight 10 kDa, pore size 0.01 μm), and an ultraviolet sterilization unit (wavelength 254 nm, power 30 W). The Cl⁻ concentration of the purified condensed water is ≤1 ppm, and the pH value is 6.5 - 7.5. It is injected into the pool heating pipeline through an anti-corrosion pipeline (PPR material) as an auxiliary heat source (the water temperature is increased by 2 - 3 °C).

[0091] Specifically, in this embodiment, a phase change material energy storage unit is added downstream of the condenser 53. The phase change material is a shaped phase change material composed of calcium chloride hexahydrate and graphene, and the phase change temperature is set at 28 - 32°C. The energy storage unit is connected to the fresh air duct and the pool water circulation pipeline respectively through a switchable pipeline. When it is detected that it is a low electricity price period at night or the pool is closed, the PLC control system 7 stores the condensation waste heat in the phase change material and preferentially releases heat to the fresh air preheating section or the pool water auxiliary heating section during the peak period of the next day. This technology realizes the time-shifted utilization of thermal energy, and the energy-saving efficiency is more than 40% higher than that of the traditional heat recovery system.

[0092] Specifically, the hot water storage tank (with a volume of 2 - 3 m³) is connected to the outlet of the water quality purification module through a DN50 pipeline. A three-way valve (opening adjustment accuracy ±2°) and a water temperature sensor (accuracy ±0.5°C) are configured at its water outlet end, and a turbine flow sensor (range 0 - 5 m³ / h, accuracy ±1%) is set at the water inlet end of the condenser 53. A float type water level gauge (resolution 1 cm) is installed in the water tank to monitor the water level status in real time.

[0093] The PLC calculates the heat load value (Q×T) based on the product of the condensate water flow rate (Q) and the water temperature (T). When the pool heating demand signal (such as the pool water temperature < 28°C) is triggered, the three-way valve switches to the pool heating pipeline side, and the opening is dynamically adjusted according to the PID algorithm (target temperature 30 ± 1°C). At the same time, the inlet flow rate of the condenser 53 is restricted to not be lower than 30% of the rated value to maintain the cooling demand of the compressor 51.

[0094] Specifically, an anti-backflow solenoid valve is installed at the inlet of the pool heating pipeline, and it is electrically controlled by the PLC control system 7 to open only when the water quality monitoring is qualified.

[0095] Specifically, the self-calibration unit is built-in with standard gas sources, including zero gas (high-purity nitrogen, purity ≥99.999%) and span gas (nitrogen mixed gas containing 1 ppm chlorine + 1000 ppm carbon dioxide), which are stored in sealed gas cylinders (volume 200 mL, pressure resistance 15 MPa), and the gas release is controlled by solenoid valves.

[0096] During the daily closing period (such as 2:00 am), the PLC starts the calibration program:

[0097] Zero calibration: Nitrogen is introduced into the chlorine / carbon dioxide sensor for 30 seconds to eliminate baseline drift;

[0098] Span calibration: Span gas is introduced for 60 seconds, and the sensor output value is compared with the preset standard value. If the deviation > ±5% (chlorine) or ±10% (CO2), the sensor gain parameter is automatically corrected.

[0099] After the calibration is completed, the waste gas is adsorbed by activated carbon and then discharged to the outside to avoid polluting the pool environment.

[0100] The main sensor (electrochemical / infrared type) and the backup sensor (metal oxide semiconductor type) are installed in parallel and share the same gas path interface. The PLC monitors the data stability of the main sensor in real time:

[0101] If the detected values exceed the preset range for three consecutive times (such as ±0.5 ppm for chlorine gas and ±50 ppm for CO2), it is determined to be ineffective;

[0102] Switch to the backup sensor, and simultaneously trigger an audible and visual alarm (85 dB buzzer + LED flashing) and a remote maintenance work order (pushed to the management platform via Wi-Fi).

[0103] During the period when the backup sensor is enabled, the PLC performs a quick self-check (only zero calibration) every 6 hours to ensure that the temporary detection accuracy error ≤ ±10%.

[0104] Specifically, a multi-layer composite protective housing is arranged around the chlorine gas detection module and the carbon dioxide detection module of the integrated gas detection device 8, including:

[0105] The outer layer is a PTFE hydrophobic and breathable membrane with a contact angle > 150° and a pore diameter ≤ 0.2 μm, allowing gas molecules to pass through while blocking liquid water;

[0106] The middle layer is a honeycomb-shaped flow guiding cavity. The inner wall of the cavity is coated with a nano-silica moisture-proof coating, and an inclined drainage micro-channel is provided at the bottom of the cavity;

[0107] The inner layer is an aluminum alloy sealed cavity with a pressure balance valve, and a calcium chloride desiccant packet is placed inside the cavity;

[0108] The flow guiding cavity is linked with the start-stop signal of the blower controlled by the PLC control system 7. When it is detected that the blower stops rotating, the pressure balance valve automatically closes to form a negative pressure sealed state. This structure realizes IP68-level waterproof and chlorine gas corrosion resistance while ensuring gas permeability.

[0109] Specifically, the PLC control system 7 accesses the swimming pool pedestrian flow monitoring system (such as an AI camera counting module or an infrared induction array) through the Modbus communication protocol and receives pedestrian flow data in real time (accuracy ≥ 95%). The system has a built-in pedestrian flow - equipment power mapping algorithm. When the detected pedestrian flow > 50 people / hour, the PLC performs the following operations:

[0110] Compressor 51 control: The frequency of the compressor 51 is increased from the reference value (50 Hz) to 90% - 100% through a frequency converter, and the cooling capacity is synchronously increased to 120 - 150 kW to meet the increased temperature and humidity load requirements caused by a high pedestrian flow;

[0111] Fresh air regulation: The speed of the fresh air fan is controlled by a fuzzy PID algorithm to increase the fresh air volume from the rated value (e.g., 3000 m³ / h) to 130% (3900 m³ / h). At the same time, the exhaust fan is linked to keep the air volume difference ≤ ±5% to prevent air pressure imbalance.

[0112] Heat recovery optimization: Automatically switch to the high-efficiency heat exchange mode. By adjusting the opening degree of the louver damper 121 (increased to 80°), the waste heat recovery of the exhaust air is strengthened, and the heat recovery efficiency is increased to 78%.

[0113] Low-load energy-saving operation mode:

[0114] When the number of people < 10 people / hour, the PLC triggers the energy-saving strategy:

[0115] Frequency reduction of the compressor 51: Through PID closed-loop control, the frequency of the compressor 51 is gradually reduced to 40% (20 Hz), and the refrigeration capacity is reduced to 60 kW. Combined with the fin temperature sensor of the evaporator 52 (accuracy ±0.5°C), frosting is prevented.

[0116] Fresh air maintenance: The fresh air volume is maintained at 80% of the rated value (2400 m³ / h). The fan speed is dynamically corrected through a differential pressure sensor (range 0 - 200 Pa) to ensure that the minimum air change rate ≥ 4 times / hour.

[0117] Equipment dormancy: If the low load lasts > 2 hours, non-core equipment (such as auxiliary heaters) is automatically turned off, and only the basic circulation water pump is maintained to run, reducing the comprehensive energy consumption by 45%.

[0118] Specifically, in this embodiment, PT100 platinum resistance temperature sensors (accuracy ±0.3°C) are evenly arranged on the fin surface of the condenser 53 with a spacing of 50 mm × 50 mm to monitor the surface temperature distribution in real time. At the same time, K-type thermocouples are set at the outlet of the evaporator 52 and the inlet of the condenser 53 to calculate the temperature difference (ΔT) between the two.

[0119] PLC built-in dual-trigger logic:

[0120] Low-temperature trigger: When any sensor detects that the temperature ≤ 2°C and lasts for 10 minutes, it is determined as a frosting risk.

[0121] Temperature difference trigger: When ΔT ≥ 15°C (evaporator 52 outlet temperature - condenser 53 inlet temperature), it is determined that the frost layer hinders heat exchange.

[0122] PTC heating and compressor 51 coordinated control:

[0123] The PTC heating element is encapsulated with a ceramic substrate, with a power density of 15 W / cm², arranged parallel to the air flow direction of the condenser 53, and the coverage area ≥ 80% of the fin area.

[0124] After defrosting is started, the PLC executes a gradient heating strategy:

[0125] Heating stage: The fin temperature is increased to 8°C at a rate of 2°C / min to avoid metal fatigue caused by thermal shock.

[0126] Power adjustment: Synchronously, the power of the compressor 51 is reduced to 50% (e.g., from 30 kW to 15 kW) through the frequency converter to reduce the refrigerant circulation volume and prevent the evaporator 52 from freezing due to supercooling.

[0127] During the defrosting process, the PLC continuously monitors the change of ΔT. If ΔT < 5°C and lasts for 3 minutes, it is determined that the defrosting is completed and the compressor 51 resumes full-power operation.

[0128] Specifically, the condenser 53 of the heat exchange device 5 adopts a double-loop heat exchange structure. The first loop is used for air heating, and the second loop is connected to the pool heating pipeline and indirectly heats the pool water through the heat exchange coil. The PLC control system 7 automatically adjusts the heat exchange power distribution of each loop according to the environmental temperature and humidity, pool water temperature, and indoor air quality, so as to achieve the optimal energy efficiency matching among dehumidification, air heating, and water heating.

[0129] Specifically, the first loop (air heating) adopts a copper tube fin heat exchanger with a diameter of Φ12mm (heat exchange area 15m²), which is directly in contact with the air flow in the air supply chamber, and heats the air through the high-temperature refrigerant (R410A, exhaust temperature 70 - 90°C) discharged from the compressor 51. The adjustable range of the outlet air temperature is 30 - 45°C.

[0130] The second loop (pool water heating) is equipped with a plate heat exchanger (made of 316L stainless steel, heat exchange area 8m²), which is connected in parallel with the pool circulation pipeline, and the water flow is switched through a three-way valve. The refrigerant releases waste heat in the second loop (the temperature drops to 40 - 50°C), indirectly heating the pool water (the water temperature rises 2 - 5°C / cycle).

[0131] PLC multi-parameter collaborative control:

[0132] Input parameters: environmental temperature and humidity (±1°C / ±3%RH), pool water temperature (±0.2°C), indoor chlorine / CO2 concentration (±0.1ppm / ±30ppm);

[0133] Control algorithm: Based on the Q-learning reinforcement learning model, the heat distribution weights of the first loop and the second loop are calculated in real time (for example: when the pool water temperature < 26°C, 70% of the heat is distributed to the second loop; when the indoor humidity > 70%, 60% of the heat is used for air heating and dehumidification), to maximize the coefficient of performance (COP).

[0134] Dynamic power distribution mechanism:

[0135] Preset a priority matrix in the PLC: dehumidification demand > pool water heating > air heating. When the chlorine concentration exceeds the standard (≥1 ppm) or CO2 ≥ 1000 ppm, the air volume of the first loop is forced to increase to 130% to preferentially discharge the polluted air.

[0136] Adopt a dual PID controller (temperature PID + humidity PID) to adjust the frequency of the compressor 51 (20 - 100 Hz) and the opening degree of the three-way valve (0 - 100%) to ensure that the temperature difference between the two loops ≤ 10 °C and avoid thermal stress damage.

[0137] Specifically, the dehumidification heat pump unit further includes a quick-release connector 9 used in cooperation with the integrated gas detection device 8. The quick-release connector 9 includes a mounting bracket 91 and a magnetic adsorption fixing seat 92 provided at the bottom of the mounting bracket 91. The mounting bracket 91 is provided with a guide rail chute structure 93. The integrated gas detection device 8 is slidably connected to the magnetic adsorption fixing seat 92 via the guide rail chute structure 93. The mounting bracket 91 is mounted to the air inlet of the air inlet device 2 and the heat exchange device 5 via the magnetic adsorption fixing seat 92.

[0138] Specifically, the guide rail chute structure 93 includes a chute 931 opened on the magnetic adsorption fixing seat 92 and a roller 932 rotatably provided in the chute 931. The mounting bracket 91 has a rod body 911, and one end of the roller 932 is rotatably provided at the end of the rod body 911. The chlorine detection module 81 and the carbon dioxide detection module 82 are respectively slidably connected to the mounting bracket via two groups of guide rail chute structures 93.

[0139] The magnetic adsorption fixing seat 92 is a combination of a neodymium iron boron permanent magnet (magnetic suction force ≥ 50 N) and a 304 stainless steel substrate, and a fluororubber elastic sealing ring (hardness 70 ± 5 Shore A) is provided on the contact surface to ensure close fit with the air outlet flange surface, and the airtightness reaches the IP67 standard.

[0140] The guide rail is made of aluminum alloy profile (cross-sectional size 20 mm × 10 mm), and a polytetrafluoroethylene wear-resistant gasket is embedded in the chute. After the integrated gas detection device 8 is inserted through the chute and rotated 90°, the anti-detachment lock catch is triggered (made of spring steel, locking force ≥ 15 N) to achieve mechanical - magnetic adsorption dual fixation.

[0141] Quick installation and maintenance mechanism:

[0142] After the magnetic adsorption fixing seat 92 at the bottom of the mounting bracket 91 is aligned with the air outlet flange, it is automatically adsorbed, the installation error ≤ ±1 mm, the single disassembly and assembly time < 5 seconds, and it is suitable for various air outlet sizes (DN150 - DN300) of the air inlet device 2, the heat exchange device 5, etc.

[0143] Anti - accidental touch protection: The anti - unlocking buckle is equipped with a Hall sensor inside. When it detects that the device is not fully locked, it triggers an audible and visual alarm (85dB buzzer + red LED flashing) to prevent the accidental detachment of the gas detection module.

[0144] Specifically, a photovoltaic panel is provided on the top of the chassis 1. The photovoltaic panel is connected to the power supply circuits of the compressor 51 and the fan through an inverter. The PLC control system 7 preferentially uses photovoltaic energy to drive the compressor 51 according to the real - time electricity price data and the photovoltaic power generation, and the remaining electric energy is stored in the battery for night use.

[0145] The photovoltaic panel on the top of the chassis 1 uses monocrystalline silicon high - efficiency components (conversion efficiency ≥ 22%) and is integrated with the unit structure through a waterproof encapsulation process (IP68 level). After the output of the photovoltaic array is optimized by the MPPT controller, a bidirectional inverter (efficiency ≥ 98%) converts the direct current into 380V alternating current, which is preferentially supplied to the compressor 51 and the fan.

[0146] In this embodiment, the PLC control system 7 of the unit has the functions of remote monitoring and data recording. It is connected to the pool management system or the cloud server through a wireless communication module (Wi - Fi or LoRa) to realize the remote monitoring of the device operation status, the storage and intelligent analysis of air quality data, and provide early warnings and maintenance suggestions. The wireless communication module uses a dual - mode wireless communication module (Wi - Fi 6 + LoRaWAN) to realize the real - time transmission of device status (such as the frequency of the compressor 51, the rotation speed of the fan, etc.), environmental parameters (temperature and humidity, chlorine / CO2 concentration), and photovoltaic power generation data. The cloud server deploys a time - series database (InfluxDB), which supports the collection of thousands of data points per second and has a storage period of ≥ 5 years.

[0147] Specifically, in this embodiment, the following structures are set for the main control board of the PLC control system 7 and the variable - frequency fan drive circuit:

[0148] Three - dimensional stereoscopic potting layer: It uses a composite potting material of modified epoxy resin and silica gel to coat the circuit board and connectors, and its volume resistivity > 1×10¹ 6 Ω·cm;

[0149] Distributed humidity sensor array: Embedded in the key nodes inside the potting layer to real - time monitor the relative humidity inside the package;

[0150] Micro PTC heating wire: Laid at the gap between the potting layer and the housing, and automatically starts heating and dehumidifying when the detection value of any humidity sensor > 60%RH;

[0151] Redundant grounding terminal: Made of titanium alloy and connected to the lightning protection grounding system of the chassis through multi - point equipotential connection;

[0152] The system enables the electrical components to still meet the IEC 60529 waterproof standard in a continuous damp heat environment of 95% RH and avoids insulation failure caused by condensation.

[0153] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A dehumidifying heat pump unit with the function of detecting chlorine gas and carbon dioxide, characterized in that: It includes a chassis (1), an air intake device (2) provided on the chassis (1), a fresh air device, an exhaust device, a heat exchange device (5), and a air supply device (6), and also includes a PLC control system (7) and an integrated gas detection device (8) electrically cooperating with the PLC control system (7); the integrated gas detection device (8) is used to cooperate with the air intake device (2) and the heat exchange device (5), the integrated gas detection device (8) includes a chlorine detection module (81) and a carbon dioxide detection module (82), the heat exchange device (5) includes a compressor (51), an evaporator (52), and a condenser (53), the warm and humid air generated in the swimming pool is inhaled through the air intake device (2) and then undergoes dehumidification or heating treatment through the compressor (51), the evaporator (52), and the condenser (53) and is then transported to the air supply device (6), and the air supply device (6) transports the dry and hot air formed after dehumidifying or heating the warm and humid air into the room matching the swimming pool for heating or for heating the swimming pool water; The PLC control system (7) is electrically connected to the integrated gas detection device (8), the compressor (51), the fresh air device, and the exhaust device respectively, and the PLC control system (7) is used to receive the concentration signals of chlorine and carbon dioxide detected by the chlorine detection module (81) and the carbon dioxide detection module (82). When the chlorine concentration or the carbon dioxide concentration exceeds the preset threshold, the PLC control system (7) regulates the fresh air device to increase the fresh air intake and simultaneously starts the exhaust device to accelerate the discharge of the waste gas in the swimming pool; Both the fresh air device and the exhaust device use variable-frequency fans for air flow exchange, and the PLC control system (7) dynamically adjusts the rotation speed of the variable-frequency fans according to the concentration of chlorine or carbon dioxide, and satisfies the following conditions: When the chlorine concentration exceeds the preset threshold, control the exhaust fan of the fresh air device to increase the power and increase the fresh air volume to 120%-150% of the rated air volume; When the carbon dioxide concentration exceeds the preset threshold, control the exhaust fan of the exhaust device to increase the power and increase the exhaust air volume to 130%-180% of the rated air volume; The difference between the fresh air volume and the exhaust air volume is within ±10% to maintain the air pressure balance inside and outside the swimming pool; A plurality of partitions (10) with openings are provided inside the chassis (1), and the plurality of partitions (10) sequentially divide the internal space of the chassis (1) into a first chamber (11), a second chamber (12), a third chamber (13), a fourth chamber (14), and a fifth chamber (15) that are interconnected. The air intake device (2), the fresh air device, the exhaust device, the heat exchange device (5), and the air supply device (6) are respectively arranged in the first chamber (11), the second chamber (12), the third chamber (13), the fourth chamber (14), and the fifth chamber (15); The air inlet device (2) includes a first air inlet (21) opened in the first chamber (11) and communicating with the inside of the swimming pool, and a first fan (22) arranged in cooperation with the first air inlet (21); the fresh air device includes a second air inlet (31) opened in the second chamber (12) and a second fan arranged in cooperation with the second air inlet (31); the exhaust device includes a third air inlet (41) opened in the third chamber (13) and a third fan arranged in cooperation with the third air inlet (41), and the air supply device (6) includes a fourth air inlet (61) and a fourth fan (62) arranged in cooperation with the fourth air inlet (61); The second air inlet (31) is communicated with the fourth air inlet (61) via a heat exchange device (5). A first filter module (55) is arranged between the second air inlet (31) and the evaporator (52). The first filter module (55) includes a plate type primary filter (551) and an activated carbon composite filter layer (552). The outside air enters the heat exchange device (5) for treatment through the primary filter and the activated carbon composite filter layer (552) in sequence; wherein the activated carbon filter layer uses modified activated carbon particles impregnated with copper oxide, and the chlorine adsorption efficiency is ≥95%; A second filter module is arranged between the first air inlet (21) and the evaporator (52). The second filter module has the same structure as the first filter module (55). The activated carbon composite filter layer (552) has a honeycomb activated carbon structure, and the thickness of the activated carbon composite filter layer (552) is 50-80 mm, which is used to assist in adsorbing chlorine and volatile organic compounds generated by the swimming pool; The dehumidification heat pump unit further includes a quick-release connector (9) used in cooperation with the integrated gas detection device (8). The quick-release connector (9) includes a mounting bracket (91) and a magnetic adsorption fixing seat (92) arranged at the bottom of the mounting bracket (91). The mounting bracket (91) is provided with a guide rail chute structure (93). The integrated gas detection device (8) is slidably matched with the magnetic adsorption fixing seat (92) via the guide rail chute structure (93) of the mounting bracket (91). The mounting bracket (91) is mounted to the air inlets of the air inlet device (2) and the heat exchange device (5) via the magnetic adsorption fixing seat (92); The magnetic adsorption fixing seat (92) is composed of a neodymium iron boron permanent magnet and a 304 stainless steel substrate. A fluororubber elastic sealing ring is arranged on the contact surface. The guide rail is made of aluminum alloy profile, and a polytetrafluoroethylene wear-resistant gasket is embedded in the chute. After the integrated gas detection device (8) is inserted through the chute and rotated 90°, the anti-detachment lock catch is triggered to realize mechanical-magnetic double fixation; A multi-layer composite protection shell is arranged around the chlorine detection module (81) and the carbon dioxide detection module (82) of the integrated gas detection device (8), including: The outer layer is a PTFE hydrophobic breathable membrane with a contact angle >150° and a pore diameter ≤0.2 μm, allowing gas molecules to pass through while blocking liquid water; The middle layer is a honeycomb-shaped diversion cavity. The inner wall of the cavity is coated with a nano-silica moisture-proof coating, and an inclined drainage micro-channel is arranged at the bottom of the cavity; The inner layer is an aluminum alloy sealed cavity with a pressure balance valve, and a calcium chloride desiccant packet is arranged in the cavity.

2. The dehumidifying heat pump unit with chlorine gas and carbon dioxide detection functions according to claim 1, characterized in that: The chlorine detection module (81) uses an electrochemical sensor, and its detection accuracy is set to 0.1 - 10 ppm; the carbon dioxide detection module (82) uses a non-dispersive infrared sensor, and its detection accuracy is set to ±50 ppm.

3. The dehumidifying heat pump unit with chlorine gas and carbon dioxide detection functions according to claim 1, characterized in that: The evaporator (52) is arranged on one side close to the air supply device (6). The refrigerant outlet of the evaporator (52) is connected to the suction port of the compressor (51) via a low-pressure suction pipe, and the exhaust port of the compressor (51) is connected to the refrigerant inlet of the condenser (53) via a high-pressure exhaust pipe; the heat exchange device (5) further includes a water receiving tray (57) for receiving the condensed water of the evaporator (52) and the condenser (53), and the heat exchange device (5) further includes a drainage pump (58). The water inlet end of the drainage pump (58) is connected to the inside of the water receiving tray (57), and the water drainage end of the drainage pump (58) is connected to the water inlet end of the condenser (53).

4. The dehumidifying heat pump unit with chlorine gas and carbon dioxide detection functions according to claim 3, characterized in that: A water quality purification module for filtering chloride ions and impurities in the condensed water is provided between the water drainage end of the drainage pump (58) and the water inlet end of the condenser (53). The condensed water purified by the water quality purification module is injected into the pool heating pipeline as an auxiliary heat source through an external circulation pump; the water quality purification module includes an ion exchange unit, an ultrafiltration membrane unit, and an ultraviolet sterilization unit that are connected in sequence, and the chloride ion concentration of the purified condensed water ≤ 1 ppm.

5. The dehumidifying heat pump unit with chlorine gas and carbon dioxide detection functions according to claim 1, characterized in that: The dehumidification heat pump unit further includes an intelligent defrosting device. The intelligent defrosting device includes a temperature sensor arranged on the surface of the fins of the condenser (53) and a PTC heating element arranged on one side of the condenser (53) body. The PLC control system (7) is used to receive the surface temperature signal of the condenser (53) detected by the temperature sensor and control the PTC heating element to perform heating and defrosting operations.

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