Fresh air system

Abstract

The fresh air system comprises a sensing module, a decision module, an execution module and an interaction module, the output end of the sensing module and the output end of the interaction module are electrically connected with the input end of the decision module, and the output end of the decision module is electrically connected with the execution module; the decision module comprises a central controller; the sensing module comprises a plurality of indoor sensing units and an outdoor sensing unit; the execution module comprises a frequency conversion fan, an air processing unit, an outdoor fresh air opening, a first intelligent air supply opening, a second intelligent air supply opening, a centralized air return opening and an indoor exhaust opening. The output ends of the indoor sensing units and the output ends of the outdoor sensing units are in communication connection with the input end of the central controller. The output end of the central controller is in communication connection with the frequency conversion fan, the air processing unit, the outdoor fresh air opening, the first intelligent air supply opening, the second intelligent air supply opening and the concentrated air return opening, and therefore the environment monitoring, intelligent control and execution functions of the novel system are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fresh air systems, in particular to a fresh air system. BACKGROUND

[0002] With the development of social economy and the improvement of people's living standards, people pay more and more attention to the health, comfort and energy saving effect of indoor air environment. As a device that can introduce fresh outdoor air into the room after filtering and temperature and humidity adjustment, and at the same time exhaust indoor dirty air, the fresh air system has been widely used in buildings such as residential buildings and office buildings, and has become a key technical means to improve indoor air quality. The existing fresh air system is usually composed of basic components such as power fan, filter screen, heat exchanger and air duct. Its basic working principle is that the air flow is driven by the fan, the outdoor air is filtered through the filter screen, and then the heat exchanger is used to recover energy with indoor exhaust air, and finally sent to the indoor to achieve the purpose of ventilation and energy saving.

[0003] However, in practical application, it is found that the existing fresh air system still has many defects, mainly in the following aspects: 1. Single sensing ability, rigid control strategy; 2. Fixed operation mode, poor energy efficiency and comfort; 3. The air supply mode is extensive, and precise ventilation cannot be realized.

[0004] Therefore, there is an urgent need in the art for a new fresh air system that can comprehensively and accurately perceive the indoor and outdoor environment and personnel state, and make intelligent decisions and precise execution accordingly, so as to realize the integration of efficient purification, energy saving and comfortable experience. SUMMARY

[0005] Therefore, it is necessary to provide a fresh air system to solve the technical problems of insufficient control precision and insufficient flexibility of the existing fresh air system.

[0006] A fresh air system, the fresh air system comprises a sensing module, a decision module, an execution module and an interaction module, the output end of the sensing module and the interaction module is electrically connected with the input end of the decision module, the output end of the decision module is electrically connected with the execution module, so as to constitute the basic structure of the fresh air system.

[0007] The decision module comprises a central controller; the sensing module comprises a plurality of indoor sensing units and outdoor sensing units; the execution module comprises a variable frequency fan, an air handling unit, an outdoor fresh air outlet, a first intelligent air outlet, a second intelligent air outlet, a centralized return air outlet and an indoor exhaust outlet; the output end of the plurality of indoor sensing units and outdoor sensing units is respectively communicatively connected with the input end of the central controller; the output end of the central controller is communicatively connected with the variable frequency fan, the air handling unit, the outdoor fresh air outlet, the first intelligent air outlet, the second intelligent air outlet and the centralized return air outlet, so as to realize the environment monitoring, intelligent control and execution function of the present system.

[0008] Several indoor sensing units are respectively set in independent indoor spaces. The first indoor sensing unit and the second indoor sensing unit are both composed of particulate matter sensor, carbon dioxide sensor, metal oxide sensor, VOCs sensor, temperature and humidity sensor and millimeter wave radar. The outdoor sensor is set in the outdoor space and the outdoor sensing unit is composed of temperature and humidity sensor, air pressure sensor and PM2.5 sensor.

[0009] The system is based on real-time monitoring data obtained from sensing modules of the indoor environment, including human activity, temperature and humidity, particulate matter, carbon dioxide, metal oxides and volatile organic compounds in the air, and intelligent control of the execution modules based on the analysis of the monitoring data by the central controller.

[0010] The fresh air system has five operating modes: (a) High-efficiency ventilation mode in which the outdoor fresh air inlet, the first intelligent air supply outlet, the second intelligent air supply outlet and the indoor exhaust outlet are open and the variable frequency fan is running at high power; (b) The first intelligent air supply outlet and the centralized return air outlet are open, and the variable frequency fan is running at low power in an energy-saving mode. (c) The first intelligent air supply outlet, the second intelligent air supply outlet, and the centralized return air outlet are open, the variable frequency fan is running at normal power, and the air handling unit is running at normal power in the internal circulation mode. (d) The first intelligent air supply outlet and the centralized return air outlet are opened, the variable frequency fan runs at low power, and the air handling unit runs at low power in sleep mode. (e) Powerful purification mode with outdoor fresh air inlet, first intelligent air supply outlet, second intelligent air supply outlet and indoor exhaust outlet open, variable frequency fan running at high power and air handling unit running at high power.

[0011] In one embodiment, the particulate matter sensor described above employs a laser-type PM2.5 sensor, a PM10 sensor, and a PM0.3 sensor.

[0012] In one embodiment, the aforementioned carbon dioxide sensor is of the NDIR type. sensor.

[0013] In one embodiment, the aforementioned VOCs sensor employs a PID photoionization VOCs sensor, which works in conjunction with a metal compound sensor to monitor volatile organic compounds such as formaldehyde, benzene compounds, and odors in the indoor air environment in real time.

[0014] In one embodiment, the aforementioned variable frequency fan is a brushless DC variable frequency fan.

[0015] In one embodiment, the outdoor fresh air inlet, the first intelligent air supply inlet, the second intelligent air supply inlet, the centralized return air inlet, and the indoor exhaust air inlet are all electrically adjustable in terms of opening angle and air volume by means of a built-in small stepping motor.

[0016] In one embodiment, the outlet side of the outdoor fresh air inlet and the outlet side of the centralized return air inlet are connected to the input end of the variable frequency fan, the output end of the variable frequency fan is connected to the input end of the air handling unit, and the output end of the air handling unit is connected to the inlet side of the first intelligent air outlet and the inlet side of the second intelligent air outlet.

[0017] In one embodiment, the air outlet side of the first intelligent air outlet, the air outlet side of the second intelligent air outlet, and the air inlet side of the centralized return air outlet are connected to the indoor air environment.

[0018] In one embodiment, the output end of the aforementioned variable frequency fan is connected to the air inlet side of the first intelligent air outlet and the air inlet side of the second intelligent air outlet via a bypass duct.

[0019] In one embodiment, the air handling unit includes a total heat exchanger, a filter system, and a PTC heater, which are connected in sequence. The input end of the total heat exchanger is connected to the output end of the variable frequency fan, and the output end of the PTC heater is connected to the air inlet side of the first intelligent air outlet and the air inlet side of the intelligent air outlet.

[0020] In one embodiment, the above-mentioned total heat exchanger uses graphene-coated polymer material as the total heat exchange core.

[0021] In one embodiment, the filter system described above includes a pre-filter, a medium-efficiency filter, a high-efficiency filter, and a gas phase filter arranged in sequence.

[0022] The aforementioned fresh air system uses a sensing module to monitor air quality, temperature, and humidity in each individual space and outdoors in real time. Simultaneously, it uses millimeter-wave radar to monitor occupants indoors. Therefore, it can detect not only common PM2.5 levels but also... The system accurately determines personnel density and ventilation efficiency based on concentration, monitors chemical pollutants such as formaldehyde and odors through VOCs sensors, and, because each space's sensing unit is independent, the system can identify the specific location of pollution sources or personnel gatherings, providing a basis for precise control. By refining the central controller's independent control over each structure of the execution module, including the variable frequency fan, air handling unit, outdoor fresh air inlet, first intelligent air supply outlet, second intelligent air supply outlet, centralized return air outlet, and indoor exhaust air outlet, the system achieves flexible switching between high ventilation mode, energy-saving mode, internal circulation mode, sleep mode, and powerful purification mode. Furthermore, the central controller automatically switches between five preset modes based on sensing data. The central controller not only controls the power of the fan and air handling unit but also controls the opening and closing of specific air outlets, thereby greatly enhancing the multi-condition adaptability and functional flexibility of the fresh air system and effectively improving energy consumption performance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a fresh air system in one embodiment. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] Please see Figure 1This invention discloses a fresh air system, which includes a sensing module 1, a decision-making module 2, an execution module 3, and an interaction module 4. The output terminals of the sensing module 1 and the interaction module 4 are electrically connected to the input terminal of the decision-making module 2, and the output terminal of the decision-making module 2 is electrically connected to the execution module 3, thereby constituting the basic structure of the fresh air system. The decision-making module 2 includes a central controller 21; the sensing module 1 includes several indoor sensing units 11 and outdoor sensing units 12; the execution module 3 includes a main unit composed of a variable frequency fan 31 and an air handling unit 32, an outdoor fresh air inlet 33, a first intelligent air supply outlet 34, a second intelligent air supply outlet 35, a centralized return air outlet 36, and an indoor exhaust air outlet 37; the output terminals of the several indoor sensing units 11 and the outdoor sensing units 12 are respectively connected to the input terminal of the central controller 21; the output terminal of the central controller 21 is connected to the variable frequency fan 31, the air handling unit 32, the outdoor fresh air inlet 33, the first intelligent air supply outlet 34, the second intelligent air supply outlet 35, and the centralized return air outlet 36, thereby realizing the environmental monitoring, intelligent control, and execution functions of this novel system. Specifically, several indoor sensing units 11 are respectively installed in independent indoor spaces. Both the first and second indoor sensing units 11 consist of a particulate matter sensor, a carbon dioxide sensor, a metal oxide sensor, a VOCs sensor, a temperature and humidity sensor, and a millimeter-wave radar. The outdoor sensor is installed in the outdoor space, and the outdoor sensing unit 12 consists of a temperature and humidity sensor, a barometric pressure sensor, and a PM2.5 sensor. Based on the real-time monitoring data obtained by the sensing module 1 of the indoor environment's human activity, temperature and humidity, particulate matter, carbon dioxide, metal oxides, and volatile organic compounds in the air, and based on the analysis of the monitoring data by the central controller 21, the execution module 3 is intelligently controlled. More specifically, the fresh air system has five operating modes: (a) The outdoor fresh air inlet 33, the first intelligent air supply outlet 34, the second intelligent air supply outlet 35 and the indoor exhaust outlet 37 are open, and the variable frequency fan 31 is running at high power in a high-efficiency ventilation mode. (b) The first intelligent air supply outlet 34 and the centralized return air outlet 36 are open, and the variable frequency fan 31 operates at low power in an energy-saving mode. (c) The first intelligent air supply outlet 34, the second intelligent air supply outlet 35 and the centralized return air outlet 36 are open, the variable frequency fan 31 is running at normal power and the air handling unit 32 is running at normal power in the internal circulation mode. (d) The first intelligent air supply outlet 34 and the centralized return air outlet 36 are opened, the variable frequency fan 31 operates at low power, and the air handling unit 32 operates at low power in sleep mode. (e) The outdoor fresh air inlet 33, the first intelligent air supply outlet 34, the second intelligent air supply outlet 35 and the indoor exhaust outlet 37 are opened, the variable frequency fan 31 is running at high power and the air handling unit 32 is running at high power in a powerful purification mode.

[0031] Based on the above setup, the fresh air system in this solution can monitor air quality, temperature, and humidity in real time in each independent space and outdoors through sensing module 1. Simultaneously, it monitors people indoors using millimeter-wave radar. Therefore, it can not only sense common PM2.5 levels but also... The system accurately determines personnel density and ventilation efficiency based on concentration, monitors chemical pollutants such as formaldehyde and odors through VOCs sensors, and, because each space's sensing unit is independent, the system can identify the specific location of pollution sources or personnel gatherings, providing a basis for precise control. By refining the independent control of each structure in the execution module 3, such as the variable frequency fan 31, air handling unit 32, outdoor fresh air inlet 33, first intelligent air supply outlet 34, second intelligent air supply outlet 35, centralized return air outlet 36, and indoor exhaust outlet 37, the central controller 21 enables flexible switching between high ventilation mode, energy-saving mode, internal circulation mode, sleep mode, and powerful purification mode. Furthermore, the central controller 21 automatically switches between five preset modes based on sensing data. The central controller 21 not only controls the power of the fan and air handling unit 32 but also controls the opening and closing of specific air outlets, thereby greatly enhancing the multi-condition adaptability and functional flexibility of the fresh air system and effectively improving energy consumption performance.

[0032] Furthermore, the particulate matter sensor employs laser-type PM2.5, PM10, and PM0.3 sensors to monitor suspended particulate matter in the indoor air environment in real time, and then transmits the indoor particulate matter monitoring data to the central controller 21 for processing and utilization.

[0033] Furthermore, the carbon dioxide sensor adopts the NDIR type. Sensors are used to accurately monitor carbon dioxide produced by the human body.

[0034] Furthermore, the VOCs sensor employs a PID photoionization VOCs sensor, which works in conjunction with a metal compound sensor to monitor volatile organic compounds such as formaldehyde, benzene compounds, and odors in the indoor air environment in real time.

[0035] Furthermore, the variable frequency fan 31 adopts a brushless DC variable frequency fan 31 to ensure low energy consumption, long service life and quietness of the fresh air system, while being able to perform stepless adjustment according to the central controller 21.

[0036] Furthermore, the outdoor fresh air inlet 33, the first intelligent air supply outlet 34, the second intelligent air supply outlet 35, the centralized return air outlet 36, and the indoor exhaust outlet 37 are all electrically adjustable in terms of opening angle and air volume through built-in small stepping motors. Moreover, when the millimeter-wave radar detects indoor personnel activity, the air supply priority of the first intelligent air supply outlet 34 and the second intelligent air supply outlet 35 can be adjusted according to the personnel's position, thereby ensuring the air supply effect while avoiding direct blowing.

[0037] Furthermore, the outlet side of the outdoor fresh air inlet 33 and the outlet side of the centralized return air inlet 36 are connected to the input end of the variable frequency fan 31. The output end of the variable frequency fan 31 is connected to the input end of the air handling unit 32. The output end of the air handling unit 32 is connected to the inlet side of the first intelligent air outlet 34 and the inlet side of the second intelligent air outlet 35. Thus, the outdoor fresh air and the indoor combined air, driven by the variable frequency fan 31, can be filtered and purified by the air handling module to form a clean airflow. Specifically, the outlet side of the first intelligent air outlet 34, the outlet side of the second intelligent air outlet 35, and the inlet side of the centralized return air inlet 36 are connected to the indoor air environment, thereby enabling the execution module 3 to drive the indoor air environment to circulate according to a preset path.

[0038] Furthermore, in one embodiment, the output end of the variable frequency fan 31 is connected to the air inlet side of the first intelligent air outlet 34 and the air inlet side of the second intelligent air outlet 35 through a bypass duct (not shown). When the circulating airflow does not need to be filtered or purified, the variable frequency fan 31 can directly deliver fresh air to the room through the first intelligent air inlet and the second intelligent air inlet.

[0039] Furthermore, the air handling unit 32 includes a total heat exchanger, a filter system, and a PTC heater, which are connected in sequence. The input end of the total heat exchanger is connected to the output end of the variable frequency fan 31, and the output end of the PTC heater is connected to the air inlet side of the first intelligent air outlet 34 and the air inlet side of the intelligent air outlet. Thus, the airflow recovers humidity and heat through the total heat exchanger, the filter system filters the airflow, and then the PTC heater regulates the temperature.

[0040] Specifically, the total heat exchanger uses graphene-coated polymer material as the core of the total heat exchange, which improves moisture permeability and thermal conductivity while also being antibacterial and mildew-proof.

[0041] Specifically, the filter system includes a pre-filter, a medium-efficiency filter, a high-efficiency filter, and a gas phase filter arranged in sequence to intercept large particles, small particles, PM2.5, PM0.3, and volatile organic compounds in the airflow in sequence.

[0042] In summary, the fresh air system disclosed in this invention can monitor air quality, temperature, and humidity in real time in each independent space and outdoors through a sensing module. Simultaneously, it monitors people indoors using millimeter-wave radar. Therefore, it can not only sense common PM2.5 levels but also... The system accurately determines personnel density and ventilation efficiency based on concentration, monitors chemical pollutants such as formaldehyde and odors through VOCs sensors, and, because each space's sensing unit is independent, the system can identify the specific location of pollution sources or personnel gatherings, providing a basis for precise control. By refining the central controller's independent control over each structure of the execution module, including the variable frequency fan, air handling unit, outdoor fresh air inlet, first intelligent air supply outlet, second intelligent air supply outlet, centralized return air outlet, and indoor exhaust air outlet, the system achieves flexible switching between high ventilation mode, energy-saving mode, internal circulation mode, sleep mode, and powerful purification mode. Furthermore, the central controller automatically switches between five preset modes based on sensing data. The central controller not only controls the power of the fan and air handling unit but also controls the opening and closing of specific air outlets, thereby greatly enhancing the multi-condition adaptability and functional flexibility of the fresh air system and effectively improving energy consumption performance.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A fresh air system, characterized in that, include: The system comprises a sensing module, a decision-making module, an execution module, and an interaction module. The outputs of the sensing module and the interaction module are electrically connected to the input of the decision-making module, and the output of the decision-making module is electrically connected to the execution module. This constitutes the basic structure of the fresh air system. The decision-making module includes a central controller; the sensing module includes several indoor sensing units and outdoor sensing units; the execution module includes a variable frequency fan, an air handling unit, an outdoor fresh air inlet, a first intelligent air supply outlet, a second intelligent air supply outlet, a centralized return air outlet, and an indoor exhaust air outlet. The output terminals of several indoor and outdoor sensing units are respectively connected to the input terminal of the central controller; the output terminal of the central controller is connected to the variable frequency fan, air handling unit, outdoor fresh air inlet, first intelligent air supply outlet, second intelligent air supply outlet and centralized return air outlet, so as to realize the environmental monitoring, intelligent control and execution functions of this new system. Several indoor sensing units are respectively set in independent indoor spaces. The first indoor sensing unit and the second indoor sensing unit are both composed of particulate matter sensor, carbon dioxide sensor, metal oxide sensor, VOCs sensor, temperature and humidity sensor and millimeter wave radar. The outdoor sensor is set in the outdoor space and the outdoor sensing unit is composed of temperature and humidity sensor, barometric pressure sensor and PM2.5 sensor. The system is based on real-time monitoring data obtained from sensing modules of human activity, temperature and humidity, particulate matter, carbon dioxide, metal oxides and volatile organic compounds in the air in the indoor environment, and intelligent control of the execution modules based on the analysis of the monitoring data by the central controller. The fresh air system has five operating modes: (a) High-efficiency ventilation mode in which the outdoor fresh air inlet, the first intelligent air supply outlet, the second intelligent air supply outlet and the indoor exhaust outlet are open and the variable frequency fan is running at high power; (b) The first intelligent air supply outlet and the centralized return air outlet are open, and the variable frequency fan is running at low power in an energy-saving mode. (c) The first intelligent air supply outlet, the second intelligent air supply outlet, and the centralized return air outlet are open, the variable frequency fan is running at normal power, and the air handling unit is running at normal power in the internal circulation mode. (d) The first intelligent air supply outlet and the centralized return air outlet are opened, the variable frequency fan runs at low power, and the air handling unit runs at low power in sleep mode. (e) Powerful purification mode with outdoor fresh air inlet, first intelligent air supply outlet, second intelligent air supply outlet and indoor exhaust outlet open, variable frequency fan running at high power and air handling unit running at high power.

2. The fresh air system according to claim 1, characterized in that, The particulate matter sensor uses a laser-type PM2.5 sensor, a PM10 sensor, and a PM0.3 sensor.

3. The fresh air system according to claim 2, characterized in that, The carbon dioxide sensor uses an NDIR type CO2 sensor.

4. The fresh air system according to claim 3, characterized in that, The VOCs sensor uses a PID photoionization VOCs sensor, which works in conjunction with a metal compound sensor to monitor volatile organic compounds such as formaldehyde, benzene series compounds, and odors in the indoor air environment in real time.

5. The fresh air system according to claim 4, characterized in that, The variable frequency fan adopts a brushless DC variable frequency fan.

6. The fresh air system according to claim 5, characterized in that, The outdoor fresh air inlet, the first intelligent air supply inlet, the second intelligent air supply inlet, the centralized return air inlet, and the indoor exhaust air inlet are all electrically adjustable in terms of opening angle and air volume through built-in small progressive motors.

7. The fresh air system according to claim 6, characterized in that, The air outlet side of the outdoor fresh air inlet and the air outlet side of the centralized return air inlet are connected to the input end of the variable frequency fan. The output end of the variable frequency fan is connected to the input end of the air handling unit. The output end of the air handling unit is connected to the air inlet side of the first intelligent air supply outlet and the air inlet side of the second intelligent air supply outlet.

8. The fresh air system according to claim 7, characterized in that, The air outlet side of the first intelligent air supply outlet, the air outlet side of the second intelligent air supply outlet, and the air inlet side of the centralized return air outlet are connected to the indoor air environment.

9. The fresh air system according to claim 8, characterized in that, The output end of the variable frequency fan is connected to the air inlet side of the first intelligent air outlet and the air inlet side of the second intelligent air outlet through a bypass duct.

10. The fresh air system according to claim 9, characterized in that, The air handling unit includes a total heat exchanger, a filter system, and a PTC heater, which are connected in sequence. The input end of the total heat exchanger is connected to the output end of the variable frequency fan, and the output end of the PTC heater is connected to the air inlet side of the first intelligent air outlet and the air inlet side of the intelligent air outlet.

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