Dual-mode dehumidification heat pump unit with disinfection and sterilization functions

Abstract

The application relates to the technical field of swimming pool equipment, and discloses a dual-mode dehumidification heat pump unit with a disinfection and sterilization function, which comprises a machine box, a return air device arranged in the machine box, a fresh air device, a heat exchange device used in cooperation with the return air device and the fresh air device, and a controller, wherein each device is electrically connected with the controller; the disinfection and sterilization device arranged in the machine box is used for disinfecting and sterilizing the air introduced by the return air device and the fresh air device; the machine box has a first cavity and a second cavity, the return air device is arranged in the first cavity, the fresh air device is arranged in the second cavity, a communication port is arranged between the first cavity and the second cavity, and an adjusting damper is movably arranged at the communication port; and the controller is used for controlling the adjusting damper to open the communication port so that the return air device and the fresh air device work cooperatively, or controlling the adjusting damper to close the communication port so that the return air device works independently.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of swimming pool equipment, and discloses a dual-mode dehumidification heat pump unit with disinfection and sterilization functions. BACKGROUND

[0002] Traditional swimming pool dehumidification heat pump units mainly focus on temperature and humidity control, and have relatively single functions. The existing equipment usually lacks efficient air disinfection and sterilization mechanisms, and cannot effectively remove bacteria, viruses and harmful substances such as volatile chloramine and carbon dioxide breeding in the air of the swimming pool, thereby affecting the air quality. At the same time, the fresh air and return air modes of most units are single, and the fresh air ratio cannot be intelligently adjusted according to environmental parameters, so it is difficult to balance between energy saving and air quality. In addition, the condensate water is usually directly discharged without considering the possibility of water quality purification and reuse, resulting in waste of water resources. Therefore, there is an urgent need for an efficient dehumidification system that integrates disinfection and sterilization, intelligent ventilation and water resource reuse. SUMMARY

[0003] In order to overcome the technical problems in the prior art that the equipment lacks efficient air disinfection and sterilization mechanisms and the fresh air and return air modes are single, the purpose of the present application is to provide a dual-mode dehumidification heat pump unit with disinfection and sterilization functions.

[0004] To achieve the above-mentioned purpose, the dual-mode dehumidification heat pump unit with disinfection and sterilization functions comprises a cabinet, a return air device, a fresh air device, a heat exchange device cooperating with the return air device and the fresh air device, and a controller, each device is electrically connected with the controller; further comprising a disinfection and sterilization device arranged in the cabinet, the disinfection and sterilization device is used for disinfecting and sterilizing the air introduced by the return air device and the fresh air device; the cabinet has a first chamber and a second chamber, the return air device is arranged in the first chamber, the fresh air device is arranged in the second chamber, a communication port is arranged between the first chamber and the second chamber, and an adjusting damper is movably arranged at the communication port; the controller is used for controlling the adjusting damper to open the communication port to make the return air device and the fresh air device work cooperatively, or to control the adjusting damper to close the communication port to make the return air device work alone.

[0005] Further, the return air device comprises a first air inlet arranged on one side of the first chamber, a first return air outlet arranged on the other side of the first chamber, and a first fan arranged in cooperation with the first return air outlet; the heat exchange device comprises a compressor, an evaporator and a condenser, the evaporator and the condenser are arranged in an air flow channel between the first air inlet and the first return air outlet, and the compressor is in communication with the evaporator and the condenser through a refrigerant pipe; the first fan is used for sucking the warm and humid air generated in the swimming pool into the first air inlet, and then performing dehumidification and reheating treatment on the air in sequence through the evaporator and the condenser, and finally returning the air to the interior space of the swimming pool through the first return air outlet;

[0006] The fresh air device comprises a second air inlet arranged on one side of the second chamber, a first air outlet arranged on the other side of the second chamber, and a second fan arranged in cooperation with the first air outlet, the second fan being used to suck external fresh air into the second chamber through the second air inlet and into the first chamber through the communication port under the driving of the first fan, for cooperation with the heat exchange device.

[0007] Further, the adjusting damper comprises a first motor, a transmission assembly connected with the first motor, and an adjusting plate connected with the transmission assembly, the first motor drives the adjusting plate to reciprocate through the transmission assembly to open or close the communication port; the controller is configured to control the adjusting damper, the first fan and the second fan, so that the dehumidification heat pump unit switches between the following modes:

[0008] The internal circulation dehumidification mode: the controller controls the adjusting damper to close the communication port, and starts the first fan and stops the second fan; the warm and humid air in the pool is sucked into the first chamber through the first air inlet, and after flowing through the heat exchange device and the sterilization and disinfection device for dehumidification, reheating and sterilization treatment, it is sent back to the internal space of the pool through the first return air outlet;

[0009] The mixed ventilation mode: the controller controls the adjusting damper to open the communication port, and starts the first fan and the second fan; part of the warm and humid air in the pool is sucked in through the first air inlet, and part of the outdoor fresh air is sucked in through the second air inlet; after the fresh air and the warm and humid air are mixed in the cabinet, they flow through the heat exchange device and the sterilization and disinfection device for dehumidification, reheating and sterilization treatment, and are sent back to the internal space of the pool through the first return air outlet; at the same time, the second fan discharges part of the warm and humid air in the second chamber to the outside of the pool through the first air outlet.

[0010] Further, the sterilization and disinfection device comprises a filter assembly arranged in the first chamber and an ultraviolet sterilization lamp used in cooperation with the filter assembly, the filter assembly comprises a plate type primary filter and a high efficiency particulate air filter arranged in sequence along the air flow direction.

[0011] Further, the ultraviolet sterilization lamp is provided with at least two groups, and the two groups of ultraviolet sterilization lamps are respectively located on the two sides of the filter assembly; the ultraviolet sterilization lamp located on the air inlet side of the filter assembly is used for primary sterilization of unfiltered air, and the ultraviolet sterilization lamp located on the air outlet side of the filter assembly is used for deep sterilization of filtered air.

[0012] Further, the sterilization and disinfection device further comprises a plasma generator, the plasma generator is arranged at the first return air outlet or / and the first air outlet, and the plasma generator is used for sterilization treatment of the air sent into the pool.

[0013] Further, the heat exchange device further comprises a water collecting tray arranged at the bottom of the condenser, and the sterilization and disinfection device further comprises a water quality sterilization unit arranged on the water collecting tray, the water quality sterilization unit being an ultraviolet sterilizer or an electrolysis module.

[0014] Further, the bottom of the water collecting tray is provided with a drain port, the sterilization and disinfection device further comprises a three-way valve, the water inlet end of the water quality sterilization unit is connected to the drain port through a pipeline, the water outlet end of the water quality sterilization unit is connected to the water inlet port of the three-way valve, the first outlet of the three-way valve is connected to a pool reuse water pipe, and the second outlet of the three-way valve is connected to a sewer; the controller is electrically connected to the three-way valve, and the water collecting tray is provided with an electric conductivity sensor for detecting the electric conductivity of the condensed water and transmitting a signal to the controller, and the controller controls the discharge or reuse of the condensed water according to the electric conductivity of the condensed water detected by the electric conductivity sensor.

[0015] Further, the dual-mode dehumidification heat pump unit further comprises an air quality sensor and a humidity sensor electrically cooperating with the controller, the air quality sensor comprises a chlorine detector and a carbon dioxide detector, and the controller is used for receiving the chlorine, carbon dioxide and humidity concentration signals of the air in the first chamber detected by the air quality sensor and the humidity sensor; when the chlorine, carbon dioxide and humidity concentration signals of the air in the first chamber exceed preset threshold values, the controller controls the fresh air device to increase the amount of introduced fresh air and controls the return air device to increase the power to accelerate the return air treatment of the warm and humid air in the pool.

[0016] Further, the controller is electrically connected to the first fan, the second fan and the compressor, and the controller is provided with a humidity priority mode and a ventilation priority mode: in the humidity priority mode, the controller controls the adjusting damper to be closed or to reduce the opening degree according to the humidity detected by the humidity sensor, and the power of the compressor is increased; in the ventilation priority mode, the controller controls the adjusting damper to increase the opening degree according to the air quality sensor signal, and the second fan is started to exhaust air, so as to preferentially reduce the concentrations of carbon dioxide and chlorine in the room.

[0017] The dehumidification heat pump unit of the present application realizes multifunctional cooperative operation through the dual-chamber structure provided with the built-in sterilization and disinfection device. The return air device and the fresh air device are respectively located in the first chamber and the second chamber, and the two modes of internal circulation dehumidification and mixed ventilation are switched through the controllable adjusting damper. In the air treatment process, multi-stage filtration, ultraviolet and plasma sterilization technologies are introduced to deeply disinfect the inhaled air. For the condensed water, the system increases a water quality judgment circuit linked with the three-way valve, and the controller automatically decides whether to reuse the water for the pool or to discharge the water according to the detected electric conductivity value, and dynamically adjusts the working states of the fan, the compressor and the damper in combination with the air quality and humidity sensor data, so as to realize integrated intelligent control of dehumidification, sterilization, ventilation and water saving.

[0018] The present application effectively improves the comprehensive performance of the swimming pool dehumidification system, the integrated disinfection and sterilization device significantly improves the air hygiene quality and reduces the risk of microorganism transmission. The double-mode intelligent switching mechanism ensures the dehumidification effect, effectively dilutes indoor harmful gases by introducing fresh air, and improves the environmental comfort. The condensate water reuse control strategy based on conductivity detection realizes the rational utilization of water resources, and achieves the purpose of energy saving and water saving. The whole system realizes efficient and self-adaptive operation under different working conditions through multi-sensor cooperation and closed-loop control, and has outstanding environmental protection and economic value. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the double-mode dehumidification heat pump unit of the present application.

[0020] Figure 2 It is a schematic diagram of the internal structure of the double-mode dehumidification heat pump unit of the present application.

[0021] Figure 3 It is a schematic diagram of the local structure of the double-mode dehumidification heat pump unit of the present application.

[0022] Figure 4 It is a schematic diagram of the structure of the adjusting damper and the partition plate of the present application.

[0023] Figure 5 It is a schematic diagram of the structure of the heat exchange device of the present application.

[0024] Figure 6 It is a schematic diagram of the structure of the water pan and the conductivity sensor of the present application.

[0025] Figure 7 It is a top view of the double-mode dehumidification heat pump unit of the present application.

[0026] Figure 8 It is a schematic diagram of the position structure of the controller of the double-mode dehumidification heat pump unit of the present application.

[0027] Figure 9 It is a schematic diagram of the structure of the air quality sensor of the double-mode dehumidification heat pump unit of the present application.

[0028] Figure 10 It is a schematic diagram of the structure of the plasma generator of the double-mode dehumidification heat pump unit of the present application.

[0029] Figure 11 It is a logic framework diagram of condensate water reuse and discharge in the double-mode dehumidification heat pump unit of the present application.

[0030] The reference signs include:

[0031] 100, cabinet; 101, partition; 102, wire hole; 103, wire outlet sleeve; 200, first chamber; 201, communication port; 202, adjusting damper; 203, first motor; 204, transmission assembly; 205, adjusting plate; 206, first guide rail structure; 207, second guide rail structure; 208, sliding support; 209, electrical compartment; 210, access door; 300, second chamber; 1, return air device; 2, fresh air device; 3, heat exchange device; 4, controller; 6, air quality sensor; 61, chlorine detector; 62, carbon dioxide detector; 63, mounting plate; 64, sliding assembly; 7, humidity sensor; 11, first air inlet; 12, first air return; 13, first fan; 21, second air inlet; 22, first air outlet; 23, second fan; 31, compressor; 32, evaporator; 33, condenser; 332, refrigerant pipe; 34, water pan; 341, drain; 35, conductivity sensor; 51, filter assembly; 511, plate primary filter; 512, high efficiency particulate air filter; 52, ultraviolet sterilization lamp; 53, plasma generator. DETAILED DESCRIPTION

[0032] For the convenience of those skilled in the art, the present application will be further described below in conjunction with examples and drawings, and the content mentioned in the embodiments is not a limitation on the present application.

[0033] Please refer to Figures 1 to 11 As shown in the drawings, the double-mode dehumidification heat pump unit with sterilization and disinfection function of the present application takes a metal cabinet 100 as the main body, the inside of the cabinet 100 is divided into a first chamber 200 and a second chamber 300 by a longitudinal partition 101, a communication port 201 for controllable communication between the two chambers is formed in the middle of the partition 101, and an openable and closable adjusting damper 202 is installed at the communication port 201. The first chamber 200 is sequentially arranged along the air flow direction as follows: a first air inlet 11, a filter assembly 51, an ultraviolet sterilization lamp 52 (hereinafter referred to as UVC) arranged between the filter assembly 51 and the heat exchanger, a heat exchange device 3 (including an evaporator 32 and a condenser 33), a first fan 13, and a first air return 12; the second chamber 300 is sequentially arranged from the outdoor side to the indoor side as follows: a second air inlet 21, a second fan 23, and a first air outlet 22.

[0034] Specifically, the heat exchange device 3 forms a closed refrigeration circuit with the compressor 31 through copper pipes, the compressor 31 is preferably installed near the partition 101 in the second chamber 300 to shorten the pipeline and reduce vibration transmission, the controller 4 is installed in the electrical compartment 209 of the cabinet 100 close to the outside of the first chamber 200 and forms an electrical cooperation relationship with the first fan 13, the second fan 23, the compressor 31, the motor of the adjusting damper 202 (the first motor 203), the sterilization and disinfection device, and various sensors, and the whole machine forms two independent air passages and one controllable mixing node.

[0035] Specifically, in the present embodiment, the side wall and the partition plate 101 of the cabinet 100 are both provided with wire holes 102, and the wire holes 102 are sleeved with silicone integrated wire outlet sleeves 103 to protect the wire harness. The structure clearly distinguishes the return air and fresh air channels and provides a stable mixing position, facilitating the orderly arrangement of the dual-mode operation and disinfection link, while shortening the pipeline, reducing noise and maintenance difficulty.

[0036] Specifically, the adjusting damper 202 adopts a linear reciprocating mechanism driven by a motor. Specifically, it includes a first motor 203, a transmission assembly 204 connected with the first motor 203, and an adjusting plate 205 installed at the output end of the transmission assembly 204. In the present embodiment, the adjusting plate 205 is slidably arranged on the partition plate 101 through a first guide rail structure 206. The transmission assembly 204 is a gear and rack assembly. The first motor 203 is fixed on the partition plate 101 near one side of the first chamber 200. Its output shaft drives the adjusting plate 205 to move linearly along the guide rail structure of the partition plate 101 through the gear and rack assembly. Temperature-resistant and humidity-resistant closed cell sealing strips are arranged around the adjusting plate 205 to ensure air tightness in the closed state.

[0037] Specifically, the first motor 203 and the controller 4 constitute a closed loop control through an opening encoder. The controller 4 can issue an opening command according to the target fresh air ratio and receive feedback to adjust the opening and closing amount in real time, while being interlocked with the wind pressure difference switch to prevent misoperation under adverse pressure difference. When the communication port 201 is completely closed, the airflow of the first chamber 200 and the second chamber 300 does not affect each other. After opening, a stable mixing area is formed on the side of the first chamber 200. This mechanical opening degree adjustment structure has fast response, high repeat positioning accuracy and reliable sealing, so that the fresh air and return air ratio can be continuously adjusted, thereby balancing energy saving and air quality.

[0038] As a preferred, the opening encoder is an incremental encoder, which is coaxially connected with the output shaft of the first motor 203 through a shaft coupling or a synchronous belt mechanism, for detecting the number of revolutions of the output shaft in real time, and transmitting the position signal to the controller 4 through RS485. The controller 4 internally stores a wind door opening degree-fresh air ratio corresponding relationship curve. When the fresh air ratio needs to be adjusted, the controller 4 calculates the target opening degree command according to the deviation of the air quality sensor 6 signal and the set value through the PID algorithm, and sends pulse signals and direction signals to the first motor 203 to drive the first motor 203 to rotate. At the same time, the controller 4 continuously receives the feedback signal of the encoder to constitute a closed loop position control, dynamically adjusts the output of the first motor 203 until the actual opening degree is consistent with the target opening degree, so as to realize the accurate and continuous adjustment of the fresh air ratio.

[0039] Further, to ensure the safe operation of the system under abnormal wind pressure, a wind pressure difference switch is connected between the first chamber 200 and the second chamber 300, which uses a high-precision micro pressure difference sensor (such as MEMS type), and is connected to the first chamber 200 mixing area and the second chamber 300 fresh air inlet near the air duct through the pressure pipeline respectively. When the pressure difference between the two chambers exceeds the preset safety threshold (such as 100Pa), the normally closed contact of the wind pressure difference switch will immediately disconnect, and this signal is sent to the interrupt input port of the controller 4 in a hard-wired manner; after the controller 4 receives the interlocking signal, it immediately suspends the current opening degree adjustment program, and drives the first motor 203 to return the adjustment damper 202 to the safe position (such as full closed or minimum opening), while triggering the audible and light alarm.

[0040] This kind of direct interlocking at the hardware level can still provide redundant protection when the controller 4 software fails, effectively preventing airflow short circuit, fan overload or damper structure damage caused by excessive pressure difference between the two chambers, and ensuring the safe and stable operation of the system under various working conditions.

[0041] Specifically, the return air device 1 is arranged in the first chamber 200. The warm and humid air of the pool space enters the first chamber 200 through the first air inlet 11 under the negative pressure generated by the first fan 13, and first passes through the filter assembly 51. The filter assembly 51 adopts a modular drawer structure, which is a plate type primary filter 511 and a high efficiency particulate air filter 512 in sequence along the airflow direction, and the two-stage filter material is installed in a drawable frame, which is limited by a guide rail and sealed by a buckle locking structure. The pressure difference sampling port is reserved on both sides of the filter section to indicate maintenance and replacement.

[0042] The warm and humid air after two-stage filtration flows into the ultraviolet sterilization lamp 52 area arranged between the filter assembly 51 and the heat exchange device 3. In this embodiment, the bottom and top of the first chamber 200 are provided with a second guide rail structure 207, which corresponds to the installation of a sliding bracket 208, and the ultraviolet lamp is fixed on the sliding bracket 208. The inner wall of the case 100 is coated with a reflective layer to improve the uniformity of irradiation and the utilization rate of light energy. The first chamber 200 is provided with a maintenance door 210 on one side, and the maintenance door 210 is provided with a door magnetic interlock, which is extinguished when the cover is opened.

[0043] As preferred, in this embodiment, a permanent magnet is embedded in the inner side frame of the access door 210, and a dry reed type door magnetic switch is installed on the door frame of the cabinet 100. The normally closed contact of the switch is connected in series to the power supply circuit of the ultraviolet germicidal lamp 52 by hard-wired connection. When the access door 210 is in the closed state, the magnetic field generated by the permanent magnet keeps the internal contact of the door magnetic switch in the attracted state, the power supply circuit is turned on, and the ultraviolet lamp can be normally started. When the access door 210 is opened, the permanent magnet moves away with the door body, causing the magnetic field to weaken or disappear. The normally closed contact in the door magnetic switch is immediately reset and disconnected under the action of the spring, thereby directly cutting off the power input of the ultraviolet lamp and achieving forced power-off at the moment of opening the cover.

[0044] Further, to ensure the reliability of the safety interlock, the hard-wired circuit is independent of the main control logic of the controller 4, forming an independent hardware safety channel. At the same time, the state signal of the door magnetic switch is also fed back to the general input port of the controller 4 in digital signal form through another set of normally open contacts; the controller 4 monitors the signal in real time, and once the "door open" state is detected, even if the hardware circuit has been powered off, the controller 4 will still lock the start command of the ultraviolet lamp at the software level, and trigger an alarm prompt on the human-machine interface, forming a double safety protection mechanism of "hardware forced power-off + software interlocking".

[0045] Specifically, the airflow then enters the evaporator 32 for sensible latent heat exchange, and the water vapor condenses into condensed water that flows into the lower water pan 34. The condenser 33 then warms up the airflow to the set supply air temperature, which is sent back to the pool space by the first fan 13 through the first return air inlet 12. This technical solution completes the three-stage processing of "pre-filtering - high-efficiency filtering - UVC irradiation" upstream of the evaporator 32, significantly reducing the microbial load and odor risk in the heat exchange device 3, maintaining the heat exchange efficiency and improving the hygiene quality of the supply air.

[0046] Specifically, the fresh air device 2 is arranged in the second chamber 300. The outdoor air enters through the second air inlet 21 and is sucked into the second chamber 300 by the second fan 23. When the adjusting damper 202 is closed, the fresh air is directly discharged outside without mixing with the first chamber 200. When the adjusting damper 202 is opened, part of the fresh air enters the mixing area of the first chamber 200 through the communication port 201 and is uniformly mixed with the warm and humid air sucked by the first fan 13. The other part of the fresh air is discharged into the exhaust system or outdoor air by the first air outlet 22 under the push of the second fan 23. The exhaust section can be provided with a plasma generator 53 to ionize and purify the exhaust gas as needed.

[0047] Specifically, the second fan 23 adopts variable frequency control, and the controller 4 adjusts the rotating speed of the second fan 23 in real time according to the target fresh air ratio and the pressure difference between indoor and outdoor, and cooperates with the adjustment of the opening degree of the adjustment damper 202 to avoid wind volume conflict. Through the structure design, the second chamber 300 forms controllable fresh air bypass, so that the system can quickly dilute indoor harmful gas and supplement fresh air into the heat exchange link as needed, thereby reducing dehumidification energy consumption.

[0048] Specifically, in the internal circulation dehumidification mode, the controller 4 closes the adjustment damper 202, the first fan 13 runs, and the second fan 23 stops. The warm and humid air in the first chamber 200 passes through the filter assembly 51, the ultraviolet sterilization, the evaporator 32 dehumidification and the condenser 33 reheating in turn, and then is sent back to the indoor. The second chamber 300 is kept static or slightly ventilated to prevent odor retention.

[0049] The refrigeration system is closed-loop regulated according to the signal of the humidity sensor 7, and the rotating speed or start-stop ratio of the compressor 31 and the opening degree of the throttling element are adjusted to maintain the surface temperature of the evaporator 32 in a suitable condensation interval and provide moderate reheating on the condenser 33 side. The inner wall of the refrigerant pipe 332 of the condenser 33 is provided with special patterns such as internal threads to disturb the flow of refrigerant, break the boundary layer and enhance the heat exchange efficiency. The plasma generator 53 is preferably installed in the downstream air supply pipe section of the first return air inlet 12 to perform terminal sterilization with the air supply. To prevent the evaporator 32 from icing under low air volume, the controller 4 monitors the fin temperature of the evaporator 32 and executes defrosting logic when needed.

[0050] Specifically, the closed-loop regulation of the refrigeration system is achieved by the following way: the controller 4 receives the analog signal (4-20mA or 0-5V) from the humidity sensor 7 arranged in the return air channel and the pool space in real time, compares it with the preset humidity set value, and if the measured humidity is higher than the set value, calculates the required refrigeration capacity increment by PID algorithm, and accordingly sends a command to the variable frequency compressor 31 to increase the rotating speed, while controlling the electronic expansion valve (throttling element) to increase the opening degree to increase the refrigerant flow, so that the surface temperature of the evaporator 32 is stably maintained in a suitable condensation interval (usually 5-10℃) below the dew point temperature, thereby maximizing the dehumidification efficiency.

[0051] At the same time, the controller 4 dynamically adjusts the rotating speed of the condensing fan or uses the reheating regulating valve to adjust the temperature and pressure sensors at the outlet of the condenser 33, and part of the heat on the condenser 33 side is used for reheating the dehumidified air, so that the supply air temperature is maintained within the set range, avoiding room temperature fluctuation.

[0052] To prevent the evaporator 32 from icing when running at low air volume, a plurality of PT1000 platinum resistance temperature sensors are embedded between the fins of the evaporator 32 to monitor the surface temperature in real time; when the temperature of any measuring point is lower than the set anti-freezing threshold (e.g. 2°C), the controller 4 immediately starts the defrosting logic: first, reduce the compressor 31 speed or temporarily stop, while keeping the first fan 13 running, using the indoor warm and humid air to passively defrost the evaporator 32; if the temperature continues to drop below 0°C, the electric heating pipe installed in the water pan 34 is started to actively defrost until the fin temperature rises above the safety value.

[0053] In addition, the plasma generator 53 is preferably installed downstream of the first return air inlet 12, and its high-voltage power supply is controlled by the controller 4 according to the operating state of the first fan 13 (judged by the auxiliary contact of the contactor) to ensure that it only works when the air is being sent, and the ozone concentration generated by it is monitored and controlled within the safety limit by the built-in ozone sensor.

[0054] This mode prioritizes dehumidification efficiency and heat recovery, suitable for periods when the external working conditions deviate greatly or the wet load is high, and can obtain a higher energy efficiency ratio and a stable indoor thermal and humid environment.

[0055] In the mixed ventilation mode, the controller 4 opens the regulating damper 202, and the fresh air and warm and humid air are mixed at the communication port 201 and then enter the first chamber 200 air duct, first pass through two-stage filtration and UVC treatment, and then enter the evaporator 32 and the condenser 33, and the mixed gas after treatment is sent back to the indoor space of the pool by the first fan 13; at the same time, the second fan 23 discharges part of the gas in the second chamber 300 to the outside of the machine according to the set proportion, thereby forming a synchronous ventilation process of “introduction-treatment-discharge”.

[0056] In the mixed ventilation mode, the implementation of the set proportion depends on a multi-parameter coordinated closed-loop control system. Specifically, the controller 4 first receives the real-time signals of the air quality sensor 6 (such as a chlorine and carbon dioxide detector 62) and the humidity sensor 7, and compares them with the internal preset target concentration value, and calculates the required fresh air dilution ratio (i.e. the target fresh air ratio) through the PID control algorithm.

[0057] Specifically, in the embodiment, the air quality sensor 6 is movably mounted on the internal partition plate of the cabinet 100 between the filter assembly 51 and the evaporator 32 through a mounting plate 63, and the mounting plate 63 is mounted on the internal partition plate through a bolt fastener, and the air quality sensor 6 is relatively slid on the mounting plate 63 through a set of sliding assemblies 64, and when maintenance and replacement are performed, the air quality sensor 6 can be slid out by means of the sliding assemblies 64.

[0058] Subsequently, the controller 4 converts the ratio value into specific execution instructions: on the one hand, it sends pulse signals to the servo motor driver of the adjusting damper 202, and forms a position closed loop through the feedback of the opening encoder coaxially connected thereto, to accurately control the damper opening degree to adjust the fresh air intake.

[0059] On the other hand, the controller 4 sends speed instructions to the frequency converters of the first fan 13 and the second fan 23 through an analog output port or a communication bus (such as Modbus), and through the built-in algorithm, the speed of the first fan 13 (return air) and the second fan 23 (exhaust air) are dynamically matched with the damper opening area, to ensure that the amount of introduced fresh air and the amount of discharged air maintain a set ratio (such as 1:1 or slightly adjusted according to the pressure difference requirement), so as to form stable air flow organization in the second chamber 300, avoiding outdoor air backflow and effectively discharging polluted gas.

[0060] In order to realize the accuracy and stability of the ratio, the system is also provided with air pressure sensors or air speed sensors at the second air inlet 21 and the first air outlet 22, which monitor the air pressure values on both sides in real time and feed back to the controller 4. The controller 4 takes this as a feedforward signal to compensate and adjust the fan speed, overcoming the air volume deviation caused by changes in air duct resistance or external air pressure fluctuations.

[0061] In addition, the controller 4 has pre-stored corresponding relationship curves of damper opening degree-fan speed-air volume, and can learn the system air resistance characteristics through self-tuning program during the debugging stage, so as to realize decoupling control of air volume in actual operation, and ensure that the required fresh air and exhaust air ratio can be accurately maintained under any working condition, thereby guaranteeing the stability of ventilation efficiency and indoor air quality.

[0062] In the embodiment, the air flow path organization in the two modes is clear: in the internal circulation dehumidification mode, the air flow runs in a closed loop of "swimming pool space→first air inlet 11→filter assembly 51→UVC→evaporator 32 (condensed water)→condenser 33 (reheating)→first fan 13→first return air inlet 12→swimming pool space", and the second chamber 300 forms an independent fresh air bypass and is isolated from the first chamber 200.

[0063] In the mixed ventilation mode, the air flow runs in a parallel path of "swimming pool space and outdoor→first air inlet 11 and second air inlet 21→communication port 201 mixing→filter assembly 51→UVC→evaporator 32→condenser 33→first fan 13→first return air inlet 12 back to the swimming pool space, while the second fan 23→first air outlet 22 discharges to the outside", and a plasma generator 53 is arranged on the side of the first air outlet 22 for exhaust gas purification if necessary.

[0064] The air speed and pressure difference of each section are matched through fan speed regulation and damper opening degree, avoiding short-circuit wind and backflow. The air flow organization is reasonable, the heat exchanger is evenly winded, and the system runs stably and has low noise.

[0065] Specifically, the controller 4 dynamically corrects the opening degree of the adjustment damper 202 and the rotation speed of the first fan 13 and the second fan 23 based on the chlorine and carbon dioxide concentrations of the air quality sensor 6 and in combination with the humidity signal, so that the indoor CO2 and chlorine are diluted and discharged in time, while the enthalpy and humidity content of the supply air are ensured to be in the comfort interval. If necessary, a UVC or photocatalytic module can be separately arranged for the fresh air portion entering the first chamber 200 to improve the hygiene level of the fresh air before mixing. High-efficiency displacement ventilation and disinfection treatment are achieved without significantly sacrificing dehumidification and temperature control, which is particularly suitable for scenes with high personnel density or obvious odor.

[0066] Specifically, the disinfection module separately arranged for the fresh air portion is implemented by adding an independent fresh air pretreatment bin in the second chamber 300 on the fresh air channel between the second air inlet 21 and the communication port 201, and sequentially installing a second group of plate-type primary filters 511 and a UVC ultraviolet germicidal lamp 52 tube or a photocatalytic unit in the bin along the flow direction of the fresh air.

[0067] The photocatalytic unit adopts a honeycomb-shaped metal carrier, the surface of which is coated with a nano-titanium dioxide (TiO2) photocatalyst coating, and a specific wavelength UVA ultraviolet lamp is correspondingly configured as an excitation light source. The pretreatment bin is modularly designed and can be pullably installed in the access opening of the side wall of the second chamber 300 through a guide rail, facilitating independent maintenance.

[0068] The start and stop of the fresh air disinfection module are intelligently controlled by the controller 4: the controller 4 monitors the running state of the second fan 23, the opening degree of the adjustment damper 202, and the signals of the outdoor air quality sensor 6 (which can be optionally configured). When the system enters the mixed ventilation mode and the fresh air ratio exceeds a certain threshold (such as 30%), or the outdoor air quality sensor 6 detects a high concentration of particulate matter / organic volatile matter, the controller 4 starts the UVC lamp tube or UVA photocatalytic excitation light source in the pretreatment bin through a relay to perform preliminary sterilization and decomposition of organic pollutants on the fresh air.

[0069] The power supply and control circuit thereof are independent of the main disinfection device, forming a special sterilization guarantee for fresh air, thereby significantly reducing the microbial and pollutant load that the introduced fresh air may carry before air mixing, and improving the overall hygiene quality of the final mixed air.

[0070] Specifically, the disinfection and sterilization device is configured in a composite manner to cover different airflow stages. In this embodiment, two groups of UVC are respectively located before and after the filter assembly 51, wherein the front group of ultraviolet sterilization lamps 52 is used for primary sterilization of unfiltered gas and inhibits the activity of microorganisms penetrating the filter material, and the rear group of ultraviolet sterilization lamps 52 is used for deep sterilization of filtered gas and reduces the microbial load entering the surface of the heat exchanger. In this embodiment, both groups of ultraviolet sterilization lamps 52 are arranged in the first chamber 200 through the sliding bracket 208 and can be pulled out to improve maintainability.

[0071] In this embodiment, the plasma generator 53 is arranged at the inner edge of the first return air inlet 12 and the first exhaust air outlet 22. The plasma generator 53 located at the first return air inlet 12 is used for end sterilization and odor degradation of air sent back to the room, and the plasma generator 53 located at the first exhaust air outlet 22 is used for processing gas discharged to the outdoor to reduce the impact on the surrounding environment.

[0072] Specifically, in actual use, the controller 4 implements zoned linkage control of the start and stop of the UVC and the plasma generator 53: the return air side lamp group is preferentially started when the communication port 201 is closed; the power of the lamp group in the fresh air side or the mixing zone is increased when the communication port 201 is opened and the fresh air ratio is large; and power is automatically turned off and an alarm is given when maintenance is detected or the light source life exceeds the limit. The multi-technology cooperation in this embodiment is controlled in different operation modes, which not only ensures the sterilization efficiency but also reduces unnecessary energy consumption and ultraviolet leakage risk.

[0073] Specifically, the zoned linkage control of the UVC and the plasma generator 53 by the controller 4 is realized in the following manner: the controller 4 collects the signal of the damper 202 opening degree encoder in real time to determine the damper state, and calculates the real-time fresh air ratio by comprehensively considering the rotation speed of the first fan 13 and the second fan 23. The controller 4 has pre-stored linkage control logic: when the communication port 201 is closed (pure internal circulation mode), the controller 4 only starts the main UVC lamp group in the first chamber 200 serving the return air and the plasma generator 53 at the first return air inlet 12 through the digital output module.

[0074] When the communication port 201 is opened and the calculated fresh air ratio is greater than a set value (such as 40%), the controller 4 will increase the power of the UVC lamp tube in the second chamber 300 fresh air pretreatment bin (if installed) or start the auxiliary UVC lamp group specially arranged in the mixing zone through the analog output module, and at the same time, increase the discharge power of the plasma generator 53 to cope with the possible increase in pollution load.

[0075] To ensure safety and reliability, the system also sets up double interlocking of hardware and software: all the power supply circuits of UVC lamps are connected in series with the normally closed contact of the door magnet switch on the corresponding maintenance door 210, realizing the hardware level protection of forced power-off when the cover is opened; at the same time, the controller 4 accumulates the running time of each sterilization unit through the internal timer, and when the value exceeds the preset lamp life threshold, the controller 4 will lock the start instruction of the unit at the software level and trigger the replacement alarm prompt on the human-machine interface.

[0076] In addition, the controller 4 reads the state feedback signal of each sterilization module in real time through the communication bus (RS485) to form a complete monitoring closed loop. This zoning linkage and intelligent power regulation strategy based on operating mode and pollution load not only ensures the sterilization effect under various working conditions, but also maximizes the avoidance of energy waste and equipment wear and tear.

[0077] Specifically, a one-piece water pan 34 is arranged below the evaporator 32 of the heat exchange device 3, and a drain port 341 is arranged at the bottom of the water pan 34. A water quality sterilization unit is connected in series on the pipeline, and a UVC water treatment device with a stainless steel shell or an electrolytic unit is preferably used. A flow switch is arranged upstream of the water quality sterilization unit for underflow protection, and a three-way valve is connected downstream. The first outlet of the three-way valve is connected to the swimming pool reuse water pipe, and the second outlet is connected to the swimming pool drainage system.

[0078] In this embodiment, an electrical conductivity sensor 35 is installed in the water pan 34 and is in communication connection with the controller 4, i.e. the electrical conductivity sensor 35 is connected to the controller 4 through an analog signal line; the controller 4 is connected to the valve core driving motor of the three-way valve through digital output line (driving relay or direct output). In actual use, the controller 4 determines whether the condensate water is reused according to the electrical conductivity threshold and the operating scene, and records the cumulative running time to perform a regular flushing program, and drives a miniature booster pump to overcome the head if necessary. The water treatment unit and the three-way valve actuator are controlled by the digital / analog output of the controller 4 to realize automatic switching of reuse and discharge. Through online disinfection and water quality discrimination, safe reuse of condensate water is realized, water resources are saved and discharge is reduced, and bacteria growth in the pipeline is avoided.

[0079] Specifically, in this embodiment, the humidity sensor 7, the chlorine detector 61 and the carbon dioxide detector 62 are arranged in the return air section and the mixing area of the first chamber 200, respectively, and their signals are connected to the analog / digital interface of the controller 4; the controller 4 takes humidity as the main control quantity of the dehumidification circuit and takes chlorine and carbon dioxide as the main control quantity of the air quality circuit, and forms hierarchical control in combination with the supply and return air temperature, the evaporator 32 fin temperature and the fan speed.

[0080] As preferred, the humidity sensor 7 is installed in the return air section of the first chamber 200, in the area after the first air inlet 11 and before the filter assembly 51. This position can most truly collect the humidity parameters of the representative warm and humid air drawn from the pool space, providing accurate control basis for the dehumidification circuit.

[0081] The chlorine detector 61 is installed in the mixing area of the first chamber 200, specifically behind the communication port 201 and before the evaporator 32 where the airflow is fully mixed but has not yet passed through the evaporator 32. Since chlorine (usually referring to chloramine and other combined chlorine) may have a density higher than air and needs to respond quickly to changes in concentration, installation in this position can sensitively perceive the mixed concentration of chlorine in the return air and fresh air, providing immediate and accurate feedback for ventilation dilution control.

[0082] The carbon dioxide detector 62 is also installed in the mixing area of the first chamber 200, but slightly offset from the chlorine detector 61 to avoid mutual interference. Since the carbon dioxide concentration is a direct indicator of personnel density, and its gas distribution is relatively uniform, installation in the center of the mixing area where the airflow is stable can reliably monitor the overall level of indoor air quality, serving as a core judgment signal for starting or increasing ventilation.

[0083] In the humidity priority mode, the opening of the communication port 201 is reduced or closed, the load of the compressor 31 is increased, and the heat exchange capacity of the evaporator 32 is maintained at the minimum necessary air volume;

[0084] In the ventilation priority mode, the opening of the communication port 201 is increased and the speed of the second fan 23 is increased, while the first fan 13 and the refrigeration system are operated within a range that does not cause temperature and humidity overshoot;

[0085] When the air quality and humidity are both out of limits, a compromise strategy is adopted, and the controller 4 balances energy consumption and index recovery time through target function optimization. The control logic includes safety interlocks for door magnets, maintenance, light source life, and pressure difference abnormalities, and can be connected to a building automation system through a communication interface for remote monitoring. This circuit connection can stably maintain humidity and air quality standards under different working conditions, and achieve adaptive operation with lower energy consumption.

[0086] Specifically, the implementation of the controller 4 through target function optimization relies on its embedded optimization algorithm module. This module takes humidity deviation, chlorine concentration deviation, and carbon dioxide concentration deviation as state variables, and takes the integral of the system total power consumption (the sum of compressor 31 and fan power) and the index overrun time as performance indicators, to construct a multi-objective optimization function.

[0087] The controller 4 adopts optimization strategies such as gradient descent or genetic algorithm to solve a set of optimal control parameter combinations (including the opening of the regulating damper 202, the rotation speed of the compressor 31, and the rotation speed of the first and second fans 23) in real time, so as to find the best balance point between system energy consumption and pollutant concentration / humidity recovery time under the premise of meeting the basic requirements of humidity and air quality.

[0088] Further, the safety interlock and remote monitoring are realized through the cooperation of hardware and software: the dry contact signals of all door magnetic switches and differential pressure switches are directly connected to the digital input module of the controller 4 through hardwires, forming a hardware safety circuit with the highest priority, which can directly cut off the power supply of related actuators (such as UV lamp power supply and compressor 31 contactor) when triggered.

[0089] At the same time, these state signals and light source life timers are mapped to specific registers in the ModbusTCP or BACnet communication protocol of the controller 4. The controller 4 exchanges data with the upper building automation system (BAS) through independent RS485 or Ethernet communication interfaces, uploads all running states, alarm information (such as door opening alarm, differential pressure abnormality, and light source life depletion), and key parameters in real time, and receives global mode setting or parameter adjustment instructions from the BAS, thereby realizing centralized monitoring and remote management. This design ensures the reliability of the system safety interlock and meets the standardization requirements of intelligent building integration.

[0090] Specifically, in the dehumidification heat pump unit of the present application, the electrical cooperation relationship of each device component follows the centralized control principle: the frequency converters of the first fan 13 and the second fan 23 are speed-regulated by the analog quantity / communication instructions of the controller 4; the compressor 31 is controlled by a dedicated drive or contactor and is interlocked with high-low pressure protection, phase sequence protection, and oil temperature protection.

[0091] The ultraviolet germicidal lamp 52 group, the plasma generator 53, the electrolysis module, and the three-way valve, and the regulating damper 202 motor are all managed by the relays of the controller 4; each sensor provides RS485 signals to the AI / DI / communication port of the controller 4. The electrical compartment 209 and the first chamber 200 are separated by a sealed partition 101, the wiring is divided into power and signal slots, and anti-condensation measures are taken. The controller 4 has built-in maintenance timer, fault self-checking, and event recording functions, supports parameter export, and remote upgrade.

[0092] In this embodiment, the installation and sealing measures take into account the high humidity and high corrosion characteristics of the pool environment. The inner wall of the cabinet 100 is coated with a corrosion-resistant coating and filled with thermal and acoustic insulation materials. All pipelines passing through the partition 101 use fireproof sealing sleeves and flexible joints. The air duct corners use large round corners to reduce pressure loss. The UVC section of the air duct uses a light-tight structure and is provided with an observation window and a mechanical key interlock. The water pan 34 uses a whole stretch forming structure and is provided with an overflow port and an anti-siphon bend. During the manufacturing process, hydrophilic coating fins are preferred to improve drainage and anti-fouling ability. The shell plate is made of galvanized or aluminum-zinc plate and is processed with edge wrapping to prevent cutting.

[0093] In summary, the present embodiment realizes the cooperative operation of dehumidification, reheating, disinfection and sterilization, intelligent ventilation, and water saving without increasing complex rare elements. Based on the above description, those skilled in the art can complete the processing, assembly, and debugging. The system can maintain indoor air hygiene and comfort under different loads and air quality demands, and realize long-period stable operation with low energy consumption.

[0094] The above is only a preferred embodiment of the present application. Those skilled in the art can make changes in specific embodiments and application ranges according to the idea of the present application. The content of this specification should not be understood as a limitation of the present application.

Claims

1. A dual-mode dehumidification heat pump unit with disinfection and sterilization function, comprising a casing (100), a return air device (1) and a fresh air device (2) disposed within the casing (100), a heat exchange device (3) used in conjunction with the return air device (1) and the fresh air device (2), and a controller (4), wherein each device is electrically connected to the controller (4); characterized in that: The disinfection and sterilization device is arranged in the cabinet (100) and used for disinfecting and sterilizing the gas introduced by the return air device (1) and the fresh air device (2); the cabinet (100) has a first chamber (200) and a second chamber (300), the return air device (1) is arranged in the first chamber (200), the fresh air device (2) is arranged in the second chamber (300), a communication port (201) is arranged between the first chamber (200) and the second chamber (300), and an adjusting damper (202) is movably arranged at the communication port (201); the controller (4) is used for controlling the adjusting damper (202) to open the communication port (201) so that the return air device (1) and the fresh air device (2) work cooperatively, or controlling the adjusting damper (202) to close the communication port (201) so that the return air device (1) works independently; The return air device (1) comprises a first air inlet (11) arranged on one side of the first chamber (200), a first return air outlet (12) arranged on the other side of the first chamber (200) and a first fan (13) arranged in cooperation with the first return air outlet (12); the heat exchange device (3) comprises a compressor (31), an evaporator (32) and a condenser (33), the evaporator (32) and the condenser (33) are arranged in an air flow channel between the first air inlet (11) and the first return air outlet (12), and the compressor (31) is in communication with the evaporator (32) and the condenser (33) through a refrigerant pipe (332); the first fan (13) is used for sucking the warm and humid air generated in the swimming pool into the swimming pool through the first air inlet (11), and then performing dehumidification and reheating treatment on the warm and humid air through the evaporator (32) and the condenser (33) in sequence, and then returning the warm and humid air to the interior space of the swimming pool through the first return air outlet (12); The heat exchange device (3) further comprises a water pan (34) arranged at the bottom of the evaporator (32) and the condenser (33), and the disinfection and sterilization device comprises a water quality sterilization unit arranged in the water pan (34), wherein the water quality sterilization unit is an ultraviolet sterilizer or an electrolysis module; A drain port (341) is arranged at the bottom of the water pan (34), the disinfection and sterilization device further comprises a three-way valve, a water inlet end of the water quality sterilization unit is connected to the drain port (341) through a pipeline, a water outlet end of the water quality sterilization unit is connected to a water inlet of the three-way valve, a first outlet of the three-way valve is connected to a swimming pool water recycling pipe, and a second outlet of the three-way valve is connected to a sewer; the controller (4) is electrically connected to the three-way valve, an electric conductivity sensor (35) for detecting the electric conductivity of the condensed water is arranged in the water pan (34) and used for transmitting a signal to the controller (4), and the controller (4) controls the discharge or recycling of the condensed water according to the electric conductivity of the condensed water detected by the electric conductivity sensor (35).

2. The dual-mode dehumidification heat pump unit with a disinfection and sterilization function according to claim 1, characterized in that: The fresh air device (2) comprises a second air inlet (21) arranged on one side of the second chamber (300), a first air outlet (22) arranged on the other side of the second chamber (300), and a second fan (23) arranged in cooperation with the first air outlet (22), the second fan (23) being used to suck external fresh air into the second chamber (300) through the second air inlet (21) and into the first chamber (200) through the communication port (201) under the driving of the first fan (13) for cooperation with the heat exchange device (3).

3. The dual-mode dehumidification heat pump unit with sterilization function according to claim 2, characterized in that: The adjusting damper (202) comprises a first motor (203), a transmission assembly (204) connected with the first motor (203), and an adjusting plate (205) connected with the transmission assembly (204), the first motor (203) drives the adjusting plate (205) to reciprocate through the transmission assembly (204) to open or close the communication port (201); the controller (4) is configured to control the adjusting damper (202), the first fan (13) and the second fan (23) to switch the dehumidification heat pump unit between the following modes: The controller (4) controls the adjusting damper (202) to close the communication port (201), and starts the first fan (13) and stops the second fan (23); warm and humid air in the pool is sucked into the first chamber (200) through the first air inlet (11), flows through the heat exchange device (3) and the sterilization and disinfection device for dehumidification, reheating and sterilization treatment, and is sent back to the pool interior space through the first air return (12); The controller (4) controls the adjusting damper (202) to open the communication port (201), and starts the first fan (13) and the second fan (23); part of the warm and humid air in the pool is sucked in through the first air inlet (11), and part of the outdoor fresh air is sucked in through the second air inlet (21), the fresh air and the warm and humid air are mixed in the cabinet (100), and then flow through the heat exchange device (3) and the sterilization and disinfection device for dehumidification, reheating and sterilization treatment, and are sent back to the pool interior space through the first air return (12); the second fan (23) is used to discharge part of the warm and humid air in the second chamber (300) to the outside of the pool through the first air outlet (22).

4. The dual-mode dehumidification heat pump unit with sterilization function according to claim 1, characterized in that: The sterilization and disinfection device comprises a filter assembly (51) arranged in the first chamber (200) and an ultraviolet sterilization lamp (52) used in cooperation with the filter assembly (51), and the filter assembly (51) comprises a plate type primary filter (511) and a high-efficiency particulate air filter (512) arranged in sequence along the air flow direction.

5. The dual mode dehumidification heat pump unit with sterilization function according to claim 4, characterized in that: The ultraviolet sterilization lamp (52) is provided with at least two groups, and the two groups of ultraviolet sterilization lamps (52) are respectively located on the two sides of the filter assembly (51), the ultraviolet sterilization lamp (52) located on the air inlet side of the filter assembly (51) is used for primary sterilization of unfiltered air, and the ultraviolet sterilization lamp (52) located on the air outlet side of the filter assembly (51) is used for deep sterilization of filtered air.

6. The dual mode dehumidification heat pump unit with sterilization function according to claim 2, characterized in that: The disinfection and sterilization device further comprises a plasma generator (53) arranged at the first return air inlet (12) and / or the first exhaust air outlet (22), and the plasma generator (53) is used for sterilizing the air sent into the swimming pool.

7. The dual mode dehumidification heat pump unit with sterilization function according to claim 1, characterized in that: The dual-mode dehumidification heat pump unit further comprises an air quality sensor (6) and a humidity sensor (7) electrically connected with the controller (4), the air quality sensor (6) comprises a chlorine detector (61) and a carbon dioxide detector (62), the controller (4) is used for receiving the chlorine, carbon dioxide and humidity values of the air in the first chamber (200) detected by the air quality sensor (6) and the humidity sensor (7); when the chlorine, carbon dioxide and humidity values of the air in the first chamber (200) exceed the preset threshold values, the controller (4) controls the fresh air device (2) to increase the fresh air introduction amount and controls the first fan (13) of the return air device (1) to increase the rotating speed to increase the load of the heat exchange device (3) and accelerate the return air treatment of the warm and humid air in the swimming pool.

8. The dual-mode dehumidification heat pump unit with sterilization function according to claim 7, characterized in that: The controller (4) is electrically connected with the first fan (13), the second fan (23) and the compressor (31), and the controller (4) is preset with a humidity priority mode and a ventilation priority mode: in the humidity priority mode, the controller (4) controls the adjusting damper (202) to be closed or the opening degree of the adjusting damper (202) to be reduced according to the humidity value detected by the humidity sensor (7), and the power of the compressor (31) is increased; in the ventilation priority mode, the controller (4) controls the adjusting damper (202) to increase the opening degree according to the signal of the air quality sensor (6), and the second fan (23) is started to exhaust air, so as to preferentially reduce the concentration of carbon dioxide and chlorine in the room.

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