Fresh air system

Abstract

The invention provides a fresh air system which comprises at least one ventilation device and a control part, the ventilation device is used for being installed at the installation position of a curtain wall and is provided with an installation space, the installation space is provided with an air inlet channel and an air exhaust channel which are independently arranged, and the air inlet end of the air inlet channel selectively communicates with the outdoor side; the air outlet end of the air inlet channel communicates with the indoor side, and the air inlet channel is used for guiding fresh air on the outdoor side into the indoor side. The air inlet end of the air exhaust channel communicates with the indoor side, the air outlet end of the air exhaust channel selectively communicates with the outdoor side, and the air exhaust channel is used for exhausting air on the indoor side to the outdoor side; the ventilation device is further provided with a heat recovery component, and the heat recovery component is arranged in the installation space. The fresh air system can effectively solve the technical problems that in the prior art, heat is wasted when a passive ventilator exhausts air, and when the temperature difference between the indoor temperature and the outdoor temperature is large, the difference between introduced fresh air and the indoor temperature is obvious, and consequently additional energy consumption is increased.

Description

Technical Field

[0001] This invention relates to the field of ventilation system technology, and more specifically to a fresh air system. Background Technology

[0002] In super high-rise buildings and buildings with special curtain walls, traditional window ventilation methods face multiple technical and practical bottlenecks. Firstly, due to strict limitations imposed by current building fire safety, energy conservation, and structural safety regulations, the area ratio, entry angle, and location of accessible window sashes are often severely restricted, making it difficult to meet the basic natural ventilation needs of indoor occupants. Secondly, in high-density urban areas or near major traffic arteries, opening windows easily introduces large amounts of outdoor noise, dust, and pollutants, severely impacting the indoor acoustic environment and air quality, and reducing building comfort. Furthermore, the wind pressure on the exterior facade of super high-rise buildings increases significantly, especially during strong winds or typhoons. Traditional outward-opening windows pose safety hazards, and excessive pressure differences between the inside and outside can easily lead to window and door seal failure, a surge in energy consumption, and even structural vibrations and airflow howling.

[0003] Most natural ventilators on the market rely on the pressure difference between indoor and outdoor air to drive airflow. Their ventilation volume is significantly affected by meteorological conditions (such as wind speed, wind direction, and temperature difference), lacking active control capabilities and making it difficult to achieve a stable and controllable supply of fresh air. Especially under windless or low-pressure conditions, ventilation efficiency drops sharply, failing to guarantee indoor air quality; while under strong wind conditions, it may cause excessive air intake, exacerbating the load on the air conditioning system and wasting energy.

[0004] More significantly, this type of passive ventilation directly exhausts temperature-controlled indoor air to the outside during the exhaust process, resulting in a substantial loss of heat and cold, and significantly reducing the overall energy efficiency of the building. Furthermore, in extreme winter or summer weather conditions, untreated outdoor fresh air entering the building directly causes uneven heating and cooling, leading to discomfort, and forces the air conditioning system to work extra to compensate for the temperature difference, further increasing energy consumption. This contradiction of "high ventilation, low energy efficiency" makes traditional natural ventilation increasingly unsuitable for modern high-rise buildings that prioritize high airtightness and low-carbon operation.

[0005] Therefore, existing technologies still need further development. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a fresh air system to solve the technical problems of heat waste caused by passive ventilators in the prior art during exhaust, and the significant temperature difference between the introduced fresh air and the indoor temperature when there is a large temperature difference between indoor and outdoor, resulting in increased additional energy consumption.

[0007] To achieve the above-mentioned technical objectives, according to one aspect of the present invention: a fresh air system is provided, comprising: at least one ventilation device and a control component; the ventilation device is for installation at a mounting position on a curtain wall, the ventilation device having an installation space, the installation space having independently arranged air inlet channels and air outlet channels, the air inlet end of the air inlet channel selectively connected to the outdoor side, the air outlet end of the air inlet channel connected to the indoor side, the air inlet channel being used to introduce fresh air from the outdoor side into the indoor side; the air inlet end of the air outlet channel is connected to the indoor side, the air outlet end of the air outlet channel selectively connected to the outdoor side, the air outlet channel being used to exhaust air from the indoor side to the outdoor side; the ventilation device further comprises a heat recovery component, the heat recovery component being disposed within the installation space; the heat recovery component having independently arranged control components... The system includes a first circulation channel and a second circulation channel, the first circulation channel forming at least a portion of an air intake channel and the second circulation channel forming at least a portion of an exhaust channel; a heat recovery component is used to exchange heat between the fresh air flowing through the first circulation channel and the exhaust air flowing through the second circulation channel; a control component is used to acquire the current indoor temperature, the current outdoor temperature, and the current indoor air quality, and to adaptively adjust the operating mode of the ventilation device based on the absolute value of the temperature difference between the current indoor temperature and the current outdoor temperature and / or the current indoor air quality; wherein, when the control component adjusts the operating mode of the ventilation device to heat exchange mode, the air intake end of the air intake channel is connected to the outdoor side, and the air outlet end of the exhaust channel is connected to the outdoor side.

[0008] Furthermore, the fresh air system also includes: a first detection element, installed on the indoor side, which is communicatively connected to the control component. The first detection element is used to detect the indoor temperature and send the detected indoor temperature value to the control component; a second detection element, installed on the indoor side, which is communicatively connected to the control component. The second detection element is used to detect the carbon dioxide concentration on the indoor side and send the detected carbon dioxide concentration value to the control component; the control component calculates the temperature difference by acquiring the current indoor temperature value and the current outdoor temperature value, and selectively controls the ventilation device to enter either heat exchange mode or fresh air mode based on the absolute value of the temperature difference and the acquired current carbon dioxide concentration value; wherein, when the absolute value of the temperature difference is greater than or equal to a preset temperature value, and the current carbon dioxide concentration value is greater than or equal to a first preset concentration value, the control component controls the ventilation device to enter heat exchange mode; when the absolute value of the temperature difference is less than the preset temperature value, and the current carbon dioxide concentration value is greater than or equal to the first preset concentration value, the control component controls the ventilation device to enter fresh air mode.

[0009] Furthermore, the fresh air system also includes: a first detection element, installed on the indoor side, which is communicatively connected to the control unit and is used to detect the indoor temperature and send the detected indoor temperature value to the control unit; and a third detection element, installed on the indoor side, which is communicatively connected to the control unit and is used to detect the indoor particulate matter concentration and send the detected indoor particulate matter concentration value to the control unit; the control unit calculates the temperature difference based on the acquired current indoor temperature value and current outdoor temperature value; and calculates the temperature difference based on the absolute value of the temperature difference, as well as the acquired current indoor particulate matter concentration value and current outdoor temperature value. The system selectively controls the ventilation device to enter either heat exchange mode or air purification mode based on particulate matter concentration. Specifically, when the absolute value of the temperature difference is greater than or equal to a preset temperature value, and the indoor particulate matter concentration is greater than or equal to a second preset concentration value, if the indoor particulate matter concentration is greater than the outdoor particulate matter concentration, the control component controls the ventilation device to enter heat exchange mode; if the indoor particulate matter concentration is less than or equal to the outdoor particulate matter concentration, the control component controls the ventilation device to enter air purification mode; and when the absolute value of the temperature difference is less than a preset temperature value, and the indoor particulate matter concentration is greater than or equal to a second preset concentration value, the control component controls the ventilation device to enter air purification mode.

[0010] Furthermore, the ventilation device is equipped with a circulating air inlet and an air outlet that communicate with the indoor side. The circulating air inlet can selectively communicate with the air inlet end of the air inlet channel, and the air outlet end of the air inlet channel can communicate with the indoor side through the air outlet. The ventilation device also includes a filter component, which is installed in the air inlet channel and located at the air inlet end of the air inlet channel. The filter component is used to filter the air entering the air inlet channel. When the control component controls the ventilation device to enter the air purification mode, the circulating air inlet is connected to the air inlet end of the air inlet channel, so that indoor air enters the air inlet end of the air inlet channel through the circulating air inlet, and after being filtered by the filter component, returns to the indoor side from the air outlet.

[0011] Furthermore, the ventilation device also includes: a first blocking component, rotatably disposed at the circulating air inlet, and the first blocking component is located within the air inlet channel. The first blocking component is used to block or avoid the circulating air inlet. The first blocking component has a first blocking position for blocking the circulating air inlet and a first avoiding position for avoiding the circulating air inlet. The first blocking component is communicatively connected to a control component, and the control component is used to control the action of the first blocking component according to the working mode of the ventilation device. When the ventilation device enters the air purification mode, the control component controls the first blocking component to move from the first blocking position to the first avoiding position.

[0012] Furthermore, the fresh air system also includes: a fourth detection element, which is installed on the indoor side and is communicatively connected to the control unit. The fourth detection element is used to detect the total volatile organic compound (TVOC) concentration on the indoor side and sends the detected TVOC concentration value to the control unit. The control unit compares the obtained current TVOC concentration value with a third preset concentration value to control whether the ventilation device enters the heat exchange mode based on the comparison result. Specifically, when the TVOC concentration value is greater than or equal to the third preset concentration value, the control unit controls the ventilation device to enter the heat exchange mode; if the TVOC concentration value is less than the third preset concentration value, the control unit controls the ventilation device to maintain the current operating mode.

[0013] Furthermore, the ventilation device also includes: a chassis, with an installation space inside the chassis, and multiple partitions within the installation space, the multiple partitions and heat recovery components dividing the installation space into independent air intake channels and exhaust channels; the chassis is provided with an air outlet and an exhaust inlet communicating with the indoor side, and a fresh air inlet and an exhaust outlet communicating with the outdoor side, the air outlet end of the air intake channel communicating with the indoor side through the air outlet, and the air intake end of the exhaust channel communicating with the indoor side through the exhaust inlet; the fresh air inlet is optionally connected to the air intake end of the air intake channel, and the exhaust outlet is optionally connected to the air outlet end of the exhaust channel.

[0014] Furthermore, the ventilation device also includes: a second blocking component, which is rotatably disposed within the air inlet channel and located at the fresh air inlet; the second blocking component is used to block or avoid the fresh air inlet; the second blocking component has a second blocking position and a second avoiding position, wherein when the second blocking component is in the second blocking position, the fresh air inlet is disconnected from the air inlet end of the air inlet channel; when the second blocking component is in the second avoiding position, the fresh air inlet is connected to the air inlet end of the air inlet channel; wherein the second blocking component is communicatively connected to a control component, and the control component is used to control the action of the second blocking component according to the working mode of the ventilation device; when the ventilation device enters the heat exchange mode or the fresh air mode, the control component controls the second blocking component to move from the second blocking position to the second avoiding position.

[0015] Furthermore, the ventilation device also includes: a third blocking component, which is rotatably disposed within the exhaust duct and located at the exhaust outlet; the third blocking component is used to block or avoid the exhaust outlet; the third blocking component has a third blocking position and a third avoiding position; when the third blocking component is in the third blocking position, the exhaust outlet is disconnected from the air outlet end of the exhaust duct; when the third blocking component is in the third avoiding position, the exhaust outlet is connected to the air outlet end of the exhaust duct; wherein, the third blocking component is communicatively connected to a control component, which is used to control the action of the third blocking component according to the working mode of the ventilation device; when the ventilation device enters the heat exchange mode or the exhaust mode, the control component controls the third blocking component to move from the third blocking position to the third avoiding position.

[0016] Furthermore, the ventilation device also includes: a supply fan, which is installed in the air inlet duct and located above the heat recovery component, with both its input and output ends connected to the air inlet duct; the supply fan drives air to flow within the air inlet duct, so that the air passes through the heat recovery component and is then delivered into the indoor side through the air outlet; and / or, an exhaust fan, which is installed in the exhaust duct and located at the exhaust end of the exhaust duct, with both its input and output ends connected to the exhaust duct; the exhaust fan drives indoor air to enter the exhaust duct through the exhaust inlet, and after flowing through the heat recovery component, is discharged to the outdoor side through the exhaust outlet.

[0017] Beneficial effects: Applying the technical solution of this invention, the fresh air system provided by this invention includes at least one ventilation device and a control component. By integrating a heat recovery component within the ventilation device and allowing fresh air and exhaust air to flow through independent but thermally coupled first and second flow channels respectively, the system can efficiently achieve heat transfer between indoor and outdoor air in a heat exchange mode. Specifically: in winter, the exhaust warm indoor air transfers heat to the introduced low-temperature fresh air through the heat recovery component, achieving fresh air preheating; in summer, the exhaust cold indoor air is used to pre-cool the high-temperature fresh air. This heat recovery process significantly reduces the additional energy consumption required by the air conditioning or heating system to handle the fresh air load, effectively improving the overall energy efficiency of the building. Furthermore, the control component monitors indoor and outdoor temperatures and indoor air quality in real time, adaptively adjusting the operating mode of the ventilation device based on the absolute value of the temperature difference between indoor and outdoor temperatures and / or air quality. This intelligent control mechanism can effectively avoid ineffective ventilation or excessive energy consumption, achieving the dual goals of on-demand air supply and precise energy saving while ensuring healthy indoor ventilation. Meanwhile, the air intake and exhaust ducts are structurally completely isolated, and the heat recovery components employ a non-contact heat exchange method, ensuring no mixing of fresh and exhaust air, effectively blocking pollutant backflow, and guaranteeing clean and safe indoor air. Furthermore, both the intake and exhaust ends can be selectively connected to the outdoor side, allowing the system to flexibly switch operating states according to season, climate, or usage scenario—for example, shutting down heat exchange and activating natural ventilation during the spring and autumn transition seasons, further optimizing comfort and economy. Moreover, the ventilation device highly integrates air intake, exhaust, and heat recovery functions into a single unit, which can be seamlessly embedded into pre-reserved openings in the curtain wall. This not only meets the aesthetic and airtightness requirements of the building facade but also eliminates the need for additional indoor space, making it particularly suitable for high-rise buildings, prefabricated buildings, and modern green buildings with high requirements for curtain wall integration. This fresh air system effectively solves the technical problems of existing passive ventilators that cause heat waste during exhaust and, when there is a large temperature difference between indoor and outdoor air, lead to increased energy consumption due to significant temperature differences between the introduced fresh air and the indoor environment. Attached Figure Description

[0018] Figure 1 A first-view schematic diagram of a ventilation device in a fresh air system provided according to the present invention is shown. Figure 2 A second-view schematic diagram of a ventilation device in a fresh air system provided according to the present invention is shown. Figure 3 A third-view schematic diagram of a ventilation device in a fresh air system provided according to the present invention is shown. Figure 4 A schematic diagram of airflow in a ventilation device in a heat exchange mode in a fresh air system provided according to the present invention is shown. Figure 5A schematic diagram of airflow in an air purification mode is shown in the ventilation device of the fresh air system provided according to the present invention. Figure 6 A schematic diagram of airflow in a fresh air system according to the present invention in fresh air mode is shown. Figure 7 A schematic diagram of airflow in exhaust mode is shown in the ventilation device of the fresh air system provided according to the present invention.

[0019] The above figures include the following reference numerals: 1. Ventilation device; 10. Air inlet duct; 11. Exhaust duct; 12. Circulating air inlet; 13. Air outlet; 14. Exhaust air inlet; 15. Fresh air inlet; 16. Exhaust air outlet; 2. Heat recovery component; 3. Filter component; 4. First sealing component; 41. First baffle; 42. First sealing door frame; 5. Chassis; 6. Second sealing component; 61. Second baffle; 62. Second sealing door frame; 7. Third sealing component; 71. Third baffle; 72. Third sealing door frame; 8. Supply fan; 9. Exhaust fan. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] Please see Figures 1 to 7According to an embodiment of the present invention, a fresh air system is provided, comprising: at least one ventilation device 1 and a control component. The ventilation device 1 is installed at a mounting position on a curtain wall. The ventilation device 1 has an installation space, which has an independently arranged air inlet channel 10 and an exhaust channel 11. The air inlet end of the air inlet channel 10 is selectively connected to the outdoor side, and the air outlet end of the air inlet channel 10 is connected to the indoor side. The air inlet channel 10 is used to introduce fresh air from the outdoor side into the indoor side. The air inlet end of the exhaust channel 11 is connected to the indoor side, and the air outlet end of the exhaust channel 11 is selectively connected to the outdoor side. The exhaust channel 11 is used to exhaust air from the indoor side to the outdoor side. The ventilation device 1 also has a heat recovery component 2, which is disposed within the installation space. The heat recovery component 2 has independently arranged... A first circulation channel and a second circulation channel are provided, the first circulation channel forming at least a portion of the air inlet channel 10 and the second circulation channel forming at least a portion of the air outlet channel 11; a heat recovery component 2 is used to exchange heat between the fresh air flowing through the first circulation channel and the exhaust air flowing through the second circulation channel; a control component is used to acquire the current indoor temperature, the current outdoor temperature, and the current indoor air quality, so as to adaptively adjust the operating mode of the ventilation device 1 according to the absolute value of the temperature difference between the current indoor temperature and the current outdoor temperature and / or the current indoor air quality; wherein, when the control component adjusts the operating mode of the ventilation device 1 to the heat exchange mode, the air inlet end of the air inlet channel 10 is connected to the outdoor side, and the air outlet end of the exhaust channel 11 is connected to the outdoor side.

[0022] As can be seen, the fresh air system provided by the present invention includes at least one ventilation device 1 and a control component. The ventilation device 1 is installed at a pre-reserved opening in the building curtain wall (i.e., the installation position on the curtain wall), so that at least part of the side of the ventilation device 1 facing the outside covers and seals the pre-reserved opening in the curtain wall, thereby achieving structural airtightness while completing indoor and outdoor air exchange through the ventilation device 1. The ventilation device 1 has an installation space inside, which integrates an independent air intake channel 10 and an air exhaust channel 11: the air intake end of the air intake channel 10 can be selectively connected to the outdoor side, and the air outlet end of the air intake channel 10 is connected to the indoor side, and the air intake channel 10 is used to introduce fresh air from the outdoor side into the indoor side. The air intake end of the exhaust channel 11 is connected to the indoor side, and the air outlet end of the exhaust channel 11 can be selectively connected to the outdoor side, and the exhaust channel 11 is used to exhaust stale air from the indoor side to the outdoor side. In addition, the ventilation device 1 also has a heat recovery component 2, which is installed in the installation space. The heat recovery component 2 has a first flow channel and a second flow channel that are independently arranged. The first flow channel forms at least a part of the air inlet channel 10, and the second flow channel forms at least a part of the air outlet channel 11. The heat recovery component 2 is used to exchange heat between the fresh air flowing through the first flow channel and the exhaust air flowing through the second flow channel, thereby realizing energy recovery. The control component is used to acquire the current indoor temperature, the current outdoor temperature, and the current indoor air quality in real time, and adaptively adjust the working mode of the ventilation device 1 based on the absolute value of the temperature difference between the current indoor temperature and the current outdoor temperature and / or the current indoor air quality. When the control component adjusts the working mode of the ventilation device 1 to heat exchange mode, the air inlet end of the air inlet channel 10 is connected to the outdoor side, and the air outlet end of the exhaust channel 11 is connected to the outdoor side, so that both the air inlet channel 10 and the exhaust channel 11 are simultaneously connected to the indoor and outdoor sides, thereby ensuring that the fresh air and exhaust air flow through the first and second circulation channels of the heat recovery component 2 respectively, and efficiently complete the heat exchange process.

[0023] Therefore, by integrating the heat recovery component 2 into the ventilation device 1 and allowing fresh air and exhaust air to flow through independent but thermally coupled first and second flow channels respectively, the system can efficiently achieve heat transfer between indoor and outdoor air in a heat exchange mode. Specifically, in winter, the exhaust warm indoor air transfers heat to the introduced low-temperature fresh air through the heat recovery component 2, achieving fresh air preheating; in summer, the exhaust cold indoor air is used to pre-cool the high-temperature fresh air. This heat recovery process significantly reduces the additional energy consumption required by the air conditioning or heating system to handle the fresh air load, effectively improving the overall energy efficiency of the building. Furthermore, the control component monitors indoor and outdoor temperatures and indoor air quality in real time, adaptively adjusting the operating mode of the ventilation device 1 based on the absolute value of the temperature difference between indoor and outdoor temperatures and / or air quality. This intelligent control mechanism effectively avoids ineffective ventilation or excessive energy consumption, achieving the dual goals of on-demand air supply and precise energy saving while ensuring healthy indoor ventilation. Meanwhile, the air intake duct 10 and exhaust duct 11 are structurally completely isolated, and the heat recovery component 2 adopts a non-contact heat exchange method to ensure that fresh air and exhaust air do not mix, effectively blocking the backflow of pollutants and ensuring the cleanliness and safety of indoor air. Furthermore, both the air intake and exhaust ends can be selectively connected to the outdoor side, allowing the system to flexibly switch its operating state according to season, climate, or usage scenario—for example, turning off heat exchange and turning on natural ventilation during the spring and autumn transition seasons, further optimizing comfort and economy. Moreover, the ventilation device 1 highly integrates air intake, exhaust, and heat recovery functions into one unit, which can be embedded as a whole into the pre-reserved openings in the curtain wall. This not only meets the aesthetic and airtightness requirements of the building facade but also does not require additional indoor space, making it particularly suitable for high-rise buildings, prefabricated buildings, and modern green buildings with high requirements for curtain wall integration. This fresh air system effectively solves the technical problems of existing passive ventilators causing heat waste during exhaust and, when there is a large temperature difference between indoor and outdoor air, the introduced fresh air has a significant temperature difference with the indoor air, leading to increased additional energy consumption.

[0024] The “exhaust ventilation” mentioned above refers to the airflow that is actively extracted from indoors and discharged to the outside.

[0025] The "indoor air quality" mentioned above refers to relevant parameters in indoor air that affect human health or comfort, typically including but not limited to one or more of the following: carbon dioxide (CO2) concentration: used to reflect the density of people and whether ventilation is adequate; volatile organic compound (VOCs) content: mainly from decoration materials, furniture, cleaning agents, etc., and is an important indicator for measuring indoor chemical pollution levels; PM2.5 or particulate matter concentration: characterizes the content of suspended fine particulate matter in the air, directly affecting respiratory health; humidity: reflects the dryness or wetness of indoor air. Excessive humidity can easily breed mold, while excessively low humidity may lead to dry skin, respiratory discomfort, and to some extent affect the diffusion and deposition of pollutants.

[0026] Furthermore, when the working mode of the ventilation device 1 is switched to the heat exchange mode, the fresh air function and the exhaust function are turned on simultaneously, so that the outdoor fresh air and the indoor exhaust air flow through the first and second flow channels in the heat recovery component 2, which are independent but thermally coupled, thereby efficiently completing the heat exchange.

[0027] Optionally, the heat recovery component 2 is a heat recovery core.

[0028] Specifically, the fresh air system further includes: a first detection element, installed on the indoor side, which is communicatively connected to the control component. The first detection element is used to detect the indoor temperature and send the detected indoor temperature value to the control component; a second detection element, installed on the indoor side, which is communicatively connected to the control component. The second detection element is used to detect the carbon dioxide concentration on the indoor side and send the detected carbon dioxide concentration value to the control component; the control component calculates the temperature difference by acquiring the current indoor temperature value and the current outdoor temperature value, and selectively controls the ventilation device 1 to enter either heat exchange mode or fresh air mode based on the absolute value of the temperature difference and the acquired current carbon dioxide concentration value; wherein, when the absolute value of the temperature difference is greater than or equal to a preset temperature value, and the current carbon dioxide concentration value is greater than or equal to a first preset concentration value, the control component controls the ventilation device 1 to enter heat exchange mode; when the absolute value of the temperature difference is less than the preset temperature value, and the current carbon dioxide concentration value is greater than or equal to the first preset concentration value, the control component controls the ventilation device 1 to enter fresh air mode.

[0029] By employing the aforementioned structural setup and incorporating first and second detection components, the system can acquire, in real-time and accurately, two core parameters reflecting indoor thermal environment and air quality—indoor temperature and indoor carbon dioxide (CO2) concentration—and combine them with outdoor temperature data to construct a multi-dimensional sensing foundation. The control components make intelligent decisions based on dual threshold criteria of absolute temperature difference and indoor CO2 concentration, upgrading the fresh air control logic from a traditional experience-driven "timed / constant airflow" model to a data-driven model of "on-demand response and dynamic optimization," significantly improving the scientific rigor, accuracy, and energy efficiency of the system's operation. Specifically, when the absolute value of the indoor-outdoor temperature difference is greater than or equal to a preset temperature threshold (indicating significant cold / heat energy recovery value), and the indoor carbon dioxide (CO2) concentration is greater than or equal to a first preset concentration threshold (indicating urgent ventilation demand), the control component automatically activates the heat exchange mode: simultaneously opening the supply and exhaust air functions, allowing fresh air and exhaust air to flow through the first and second flow channels in the heat recovery component 2, which are isolated but thermally coupled. While efficiently replacing the air, it recovers the cold or heat carried in the exhaust air, pre-cooling or preheating the introduced fresh air. This process reduces the additional load on the air conditioning or heating system caused by handling fresh air, truly achieving a synergistic unity of "healthy ventilation" and "energy-saving operation." When the indoor and outdoor temperature difference is small (the absolute value is less than the preset temperature threshold, and the heat recovery benefit is weak or even negative), but the indoor carbon dioxide (CO2) concentration is still higher than the air quality threshold (requiring ventilation), the system intelligently switches to fresh air mode (e.g., only activating the fresh air function). In this case, fresh outdoor air is directly introduced to dilute pollutants without initiating the heat exchange process, thus avoiding unnecessary system power consumption and further optimizing overall energy efficiency while meeting basic ventilation needs. In summary, this control strategy, through a closed-loop mechanism of environmental perception, logical judgment, and mode switching, effectively avoids the energy waste caused by blind heat recovery in traditional fresh air systems under no temperature difference conditions, as well as the energy loss caused by excessive ventilation under low pollution conditions. It achieves refined and intelligent operation of "exchanging when necessary, saving when necessary, and efficiently recovering when necessary," significantly improving building energy utilization efficiency while ensuring indoor air health and thermal comfort. It is particularly suitable for residential, office, and public building scenarios with high requirements for energy efficiency and intelligence.

[0030] The "first preset concentration value" mentioned above refers to a pre-set carbon dioxide (CO2) concentration threshold, used to determine whether indoor air quality needs to be improved by introducing fresh air or activating ventilation measures. For example, the first preset concentration value can be set to 800ppm to 1000ppm, preferably 1000ppm.

[0031] Furthermore, when the working mode of the ventilation device 1 is switched to the fresh air mode, the air inlet end of the air inlet channel 10 is connected to the outdoor side, while the air outlet end of the exhaust channel 11 is disconnected from the outdoor side. At this time, only the outdoor fresh air is introduced into the indoor side, and no exhaust operation is performed, nor is the heat exchange function activated. The first circulation channel of the heat recovery component 2 only serves as the circulation path of fresh air and does not participate in heat exchange.

[0032] Furthermore, when the absolute value of the temperature difference is greater than or equal to the preset temperature value, and the current carbon dioxide concentration value is less than the first preset concentration value, the fresh air system can adjust its operating mode in the following ways: Switch to the target working mode based on the user's manual selection; The system can maintain its current operating mode; or, by combining other air quality parameters (such as PM2.5, VOCs, humidity, etc.) and / or the absolute value of the temperature difference, the control components can make a comprehensive judgment and adaptively adjust the operating mode. This design enhances the system's flexibility and intelligence, ensuring energy saving and comfort while also taking into account the user's personalized needs and the dynamic response capability to multi-dimensional environmental factors.

[0033] Furthermore, the first detection element is also used to detect indoor humidity and send the detected indoor temperature value to the control unit. The control unit calculates the temperature difference by acquiring the current indoor temperature value and the current outdoor temperature value; and selectively controls the ventilation device 1 to enter the heat exchange mode or the exhaust mode based on the absolute value of the temperature difference and the acquired current indoor humidity value and current outdoor humidity value. Specifically, when the absolute value of the temperature difference is greater than or equal to the preset temperature value and the indoor humidity value is greater than or equal to the preset humidity value, if the indoor humidity value is greater than the outdoor humidity value, the control unit controls the ventilation device 1 to enter the heat exchange mode; if the indoor humidity value is less than or equal to the outdoor humidity value, the control unit controls the ventilation device 1 to enter the exhaust mode; when the absolute value of the temperature difference is less than the preset temperature value and the indoor humidity value is greater than or equal to the preset humidity value, the control unit controls the ventilation device 1 to enter the exhaust mode.

[0034] Furthermore, when the ventilation device 1 switches to exhaust mode, the air inlet end of the air inlet duct 10 is disconnected from the outdoor side, while the air outlet end of the exhaust duct 11 is connected to the outdoor side, only exhausting indoor air to the outside, thereby effectively reducing indoor humidity or removing polluted gases. In this mode, the second circulation channel of the heat recovery component 2 only serves as the circulation path for the exhaust airflow and does not participate in heat exchange.

[0035] Furthermore, the control components establish communication connections with external networks (such as the Internet, local area networks, or meteorological service platforms) to acquire outdoor environmental parameters in real time, including but not limited to outdoor temperature, humidity, and particulate matter concentrations (such as PM2.5 and PM10). This data can serve as an important basis for the intelligent control of the fresh air system.

[0036] Optionally, the first detection element is a temperature and humidity sensor, and the second detection element is a carbon dioxide sensor.

[0037] Specifically, the fresh air system also includes: a third detection element, installed on the indoor side, which is communicatively connected to the control unit. The third detection element is used to detect the indoor particulate matter concentration and send the detected indoor particulate matter concentration value to the control unit. The control unit calculates the temperature difference based on the acquired current indoor temperature value and current outdoor temperature value. Based on the absolute value of the temperature difference, and the acquired current indoor particulate matter concentration value and current outdoor particulate matter concentration, the control unit selectively controls the ventilation device 1 to enter either a heat exchange mode or an air purification mode. Specifically, when the absolute value of the temperature difference is greater than or equal to a preset temperature value, and the indoor particulate matter concentration is greater than or equal to a second preset concentration value, if the indoor particulate matter concentration is greater than the outdoor particulate matter concentration, the control unit controls the ventilation device 1 to enter the heat exchange mode; if the indoor particulate matter concentration is less than or equal to the outdoor particulate matter concentration, the control unit controls the ventilation device 1 to enter the air purification mode; when the absolute value of the temperature difference is less than a preset temperature value, and the indoor particulate matter concentration is greater than or equal to the second preset concentration value, the control unit controls the ventilation device 1 to enter the air purification mode.

[0038] By employing the aforementioned structural setup, a third detection element monitors indoor particulate matter concentration in real time. Combined with outdoor particulate matter data acquired from an external network and the indoor-outdoor temperature difference, refined intelligent control is achieved: when indoor particulate matter concentration exceeds the standard and outdoor air is cleaner (i.e., indoor particulate matter concentration is higher than outdoor), and the indoor-outdoor temperature difference is significant, the system activates heat exchange mode, efficiently recovering cold / heat from exhaust air while introducing clean fresh air. Conversely, when outdoor pollution is more severe or the temperature difference is smaller, it automatically switches to air purification mode for internal circulation filtration, preventing pollutant intrusion. This strategy, while ensuring indoor air cleanliness, also considers energy efficiency and health, significantly improving the adaptability and operational reliability of the fresh air system in complex environments such as smog and dust storms.

[0039] Furthermore, when the ventilation device 1 switches to air purification mode, the air inlet end of the air inlet duct 10 is disconnected from the outdoor side, and the air outlet end of the exhaust duct 11 is also disconnected from the outdoor side. At this time, indoor air enters the device through the air inlet duct 10 for purification, and the purified air is returned to the room through the air outlet end of the air inlet duct 10, forming an internal circulation airflow. In this mode, the first circulation channel of the heat recovery component 2 only serves as the circulation path for purified air and does not participate in heat exchange.

[0040] Therefore, the air intake duct 10 is not only used to introduce fresh outdoor air, but also as a channel for transporting purified air, so as to send the purified indoor air back into the indoor side and realize the internal circulation purification function.

[0041] Optionally, the third detection element is a PM2.5 sensor with a detection range of 0 μg / m³ to 999 μg / m³.

[0042] The "second preset concentration value" mentioned above refers to a pre-set particulate matter concentration threshold, used to determine whether the particulate matter pollution in indoor air has reached a level requiring purification or ventilation intervention. For example, this threshold can be set from 35 μg / m³ to 75 μg / m³, preferably 75 μg / m³.

[0043] Specifically, such as Figure 2 , Figure 3 and Figure 5 As shown, the ventilation device 1 is provided with a circulating air inlet 12 and an air outlet 13 that communicate with the indoor side. The circulating air inlet 12 can selectively communicate with the air inlet end of the air inlet channel 10, and the air outlet end of the air inlet channel 10 can communicate with the indoor side through the air outlet 13. The ventilation device 1 also includes a filter component 3, which is disposed in the air inlet channel 10 and located at the air inlet end of the air inlet channel 10. The filter component 3 is used to filter the air entering the air inlet channel 10. When the control component controls the ventilation device 1 to enter the air purification mode, the circulating air inlet 12 is connected to the air inlet end of the air inlet channel 10 so that the indoor air enters the air inlet end of the air inlet channel 10 through the circulating air inlet 12, and after being filtered by the filter component 3, returns to the indoor side from the air outlet 13.

[0044] With the above-described structure, by setting up a circulating air inlet 12 and an air outlet 13 connected to the indoor side on the ventilation device 1, and integrating the filter component 3 into the air inlet end of the air inlet channel 10, the system can achieve efficient internal circulation purification in air purification mode: indoor air enters the air inlet channel 10 through the circulating air inlet 12, first passes through the filter component 3 to remove particulate matter, odors, or other pollutants, and then is returned to the room through the air outlet 13, forming a closed purification loop. This design does not require additional independent air purification equipment, makes full use of existing air ducts and fan resources, and is compact, low-cost, and easy to maintain. At the same time, since the air purification process is completed entirely inside the device, it avoids dependence on the external environment and can effectively ensure indoor air cleanliness even when outdoor air quality is poor. In addition, the circulating air inlet 12 and the air inlet channel 10 adopt a "selective connection" design, which allows the system to flexibly switch between fresh air mode, heat exchange mode, and air purification mode, truly achieving "one machine with multiple functions" and significantly improving the environmental adaptability, health protection capability, and overall energy efficiency of the fresh air system.

[0045] Furthermore, the circulating air inlet 12 is located below the filter element 3, and the heat recovery element 2 is located above the filter element 3. When the air purification mode is activated, indoor air enters the air intake channel 10 through the circulating air inlet 12, then flows upward, first passing through the filter element 3 for purification, then continuing upward through the heat recovery element 2, and finally returning to the indoor side through the air outlet 13. This airflow path design ensures that the air undergoes efficient filtration and smooth delivery sequentially during internal circulation, while avoiding contamination of the heat recovery element, thus balancing purification effect and long-term system reliability.

[0046] Specifically, such as Figure 2 and Figure 5 As shown, the ventilation device 1 further includes: a first blocking component 4, which is rotatably disposed at the circulating air inlet 12 and located within the air inlet channel 10. The first blocking component 4 is used to block or avoid the circulating air inlet 12. The first blocking component 4 has a first blocking position for blocking the circulating air inlet 12 and a first avoiding position for avoiding the circulating air inlet 12. The first blocking component 4 is communicatively connected to a control component, which is used to control the action of the first blocking component 4 according to the working mode of the ventilation device 1. When the ventilation device 1 enters the air purification mode, the control component controls the first blocking component 4 to move from the first blocking position to the first avoiding position.

[0047] By adopting the above-described structural design, and by setting a rotatable first sealing component 4 at the circulating air inlet 12 and communicating it with the control component, intelligent and precise control of the opening and closing state of the circulating air inlet 12 is achieved. When the ventilation device 1 is operating in a non-air purification mode (such as heat exchange mode or fresh air mode), the first sealing component 4 is in the first sealing position, effectively sealing the circulating air inlet 12 to prevent airflow short-circuiting or unfiltered outdoor air from entering through the inlet, ensuring the sealing of the fresh air path and the rationality of airflow organization. When the ventilation device 1 switches to air purification mode, the control component automatically drives the first sealing component 4 to rotate to the first clearance position, opening the circulating air inlet 12, allowing indoor air to smoothly enter the air intake channel 10, be purified by the filter component 3, and then be returned to the room, forming an efficient internal circulation. This design not only ensures the independence and integrity of the airflow path under different operating modes and avoids mutual interference between modes, but also improves the sealing performance, purification efficiency, and operational reliability of the ventilation device 1. Meanwhile, the use of a rotatable structure to achieve blocking and avoidance is simple, responsive, and space-saving, which is conducive to the compactness and modularity of the internal layout of the ventilation device 1, and provides key structural support for the realization of multi-functional integration and intelligent operation of the fresh air system.

[0048] Furthermore, the first sealing component 4 includes: a first baffle 41, a first sealing door frame 42, and a first sealing element. The bottom end of the first baffle 41 is rotatably mounted in the air inlet channel 10 via a hinge shaft, allowing it to rotate relative to the circulating air inlet 12; the first sealing door frame 42 is fixed to the first baffle 41 and located on the side of the first baffle 41 closest to the circulating air inlet 12; the first sealing element is disposed around the periphery of the first sealing door frame 42. When the first sealing component 4 rotates from the first clearance position to the first sealing position, the first baffle 41 swings around the axis of the hinge shaft toward the circulating air inlet 12, causing the first sealing door frame 42 to fit against the opening of the circulating air inlet 12, and achieving effective sealing through the first sealing element, thereby reliably blocking the airflow through the circulating air inlet 12. This structure not only has stable operation and good sealing performance, but is also easy to integrate and maintain, ensuring accurate switching and isolation of the airflow path of the ventilation device 1 in different working modes.

[0049] Furthermore, the first sealing component 4 is driven to rotate by a first motor, which is communicatively connected to the control component to precisely adjust the position of the first sealing component 4 according to the control command, thereby realizing the automatic opening or closing of the circulating air inlet 12.

[0050] Specifically, the fresh air system also includes: a fourth detection element, which is installed on the indoor side and is communicatively connected to the control unit. The fourth detection element is used to detect the total volatile organic compound (TVOC) concentration on the indoor side and send the detected TVOC concentration value to the control unit. The control unit compares the obtained current TVOC concentration value with a third preset concentration value to control whether the ventilation device 1 enters the heat exchange mode based on the comparison result. When the TVOC concentration value is greater than or equal to the third preset concentration value, the control unit controls the ventilation device 1 to enter the heat exchange mode. If the TVOC concentration value is less than the third preset concentration value, the control unit controls the ventilation device 1 to maintain the current working mode.

[0051] With the above-described structure, a fourth detection element (such as a TVOC sensor) is used to monitor the indoor total volatile organic compound (TVOC) concentration in real time. When the TVOC concentration rises to a third preset value or higher, the system determines that there is significant indoor chemical pollution that may harm human health or reduce environmental comfort. At this point, regardless of the temperature difference between indoors and outdoors, the control unit prioritizes activating the heat exchange mode—that is, simultaneously activating both fresh air and exhaust ventilation: outdoor fresh air is introduced into the room through the intake duct, while indoor air containing pollutants such as TVOC is exhausted through the exhaust duct. During this process, the heat recovery component exchanges heat between the fresh air and exhaust air, efficiently diluting and removing harmful gases while maximizing the retention of indoor cooling or heating capacity, thus balancing air quality improvement and thermal comfort. When the TVOC concentration is below the third preset value, the ventilation device 1 maintains its current operating mode to avoid unnecessary ventilation energy consumption and improve overall operating efficiency. This strategy breaks through the limitations of traditional methods that rely solely on CO2 concentration or particulate matter levels to assess indoor air quality. It achieves proactive sensing and precise response to gaseous pollutants (such as formaldehyde, benzene compounds, and other VOCs), significantly enhancing the health protection capabilities of the fresh air system in complex scenarios such as after renovation, cleaning operations, cooking, or when people are in high-density environments. Crucially, when TVOC levels exceed the standard, the system prioritizes ensuring indoor air cleanliness, no longer using temperature difference as a prerequisite for activating heat exchange mode. This fully embodies the intelligent control concept of "health first, energy saving synergy," making it more suitable for residential, office, school, and medical settings with high requirements for indoor environmental quality.

[0052] The "third preset concentration value" mentioned above refers to a pre-set total volatile organic compound (TVOC) concentration threshold, used to determine whether gaseous pollutants in indoor air have reached a level requiring ventilation intervention. In a fresh air system, this threshold can be set from 500 ppb to 1000 ppb (based on the equivalent TVOC value output by the sensor) depending on the characteristics of the TVOC sensor used, preferably 500 ppb, as the critical point for triggering the heat exchange mode.

[0053] It should be noted that "ppb" here refers to the equivalent concentration unit output by the TVOC sensor (usually with isobutylene or toluene as the reference gas), used for trend judgment and threshold control, and is not equivalent to the actual mass concentration of TVOC under standard conditions (μg / m³).

[0054] Optionally, the fourth detection element is a TVOC sensor with a detection range of 0 ppb to 65000 ppb.

[0055] Furthermore, the first detection element (temperature and humidity sensor), the second detection element (CO2 sensor), the third detection element (PM2.5 sensor), and the fourth detection element (TVOC sensor) can be integrated into the same multi-functional environmental monitoring module. This module has a compact structure, is easy to deploy flexibly, and can be placed on an indoor desktop or mounted on a wall to more accurately and comprehensively reflect the air quality conditions in areas where people are active.

[0056] Optionally, RS485 wired communication can be used between the aforementioned detection components and control components, as well as between the control components and ventilation devices, to ensure stable and reliable signal transmission. Alternatively, any one or a combination of various wireless communication methods such as Wi-Fi, Bluetooth, and 433MHz can be used to achieve flexible wiring, remote monitoring, and intelligent linkage. This design balances industrial-grade stability with the convenience of smart homes, and is suitable for installation and maintenance needs in different building scenarios.

[0057] Furthermore, the fresh air system also includes a control panel, which has a display screen and operation buttons (or a touch interface) and is communicatively connected to the control components. Through this control panel, indoor environmental data collected in real time by the first sensor (temperature and humidity sensor), the second sensor (CO2 sensor), the third sensor (PM2.5 sensor), and the fourth sensor (TVOC sensor) can be displayed, including key parameters such as temperature, humidity, carbon dioxide concentration, particulate matter concentration, and total volatile organic compound concentration.

[0058] Meanwhile, users can manually select or adjust the operating mode of ventilation device 1 (such as heat exchange mode, fresh air mode, exhaust mode, or air purification mode) according to their own needs through the control panel to achieve personalized ventilation and air quality management. This design not only improves the system's visibility and user-friendliness but also enhances the user's control over the indoor environment, taking into account both intelligent and humanized experience.

[0059] Furthermore, the first detection element (temperature and humidity sensor), the second detection element (CO2 sensor), the third detection element (PM2.5 sensor), and the fourth detection element (TVOC sensor) continuously monitor indoor environmental parameters in real time. When any detection index exceeds its corresponding preset threshold, the control component will dynamically adjust the operating mode of the ventilation device 1 according to a preset priority strategy.

[0060] Specifically, when the fourth detector detects total volatile organic compounds (TVOC), the control unit will prioritize responding to the TVOC exceeding the standard signal and immediately activate the heat exchange mode: simultaneously turning on the fresh air and exhaust functions, allowing outdoor fresh air to be introduced into the room through the air intake channel, while exhausting indoor air containing pollutants such as TVOC through the exhaust channel; during this process, the heat recovery unit 2 exchanges heat with the fresh and exhaust air, efficiently diluting and removing harmful gaseous pollutants while retaining indoor cooling / heat to the maximum extent, taking into account both health protection and thermal comfort.

[0061] For other abnormal environmental parameters (such as excessively high CO2 concentration, PM2.5 exceeding the standard, or humidity deviating from the comfortable range), if only one of the indicators triggers the threshold, the control component will execute the corresponding operating mode according to the dedicated control logic corresponding to that indicator—for example, switching to fresh air mode, exhaust mode, or internal circulation air purification mode, to achieve on-demand response and precise control of air management.

[0062] This multi-parameter integrated hierarchical response mechanism fully considers the different risk levels of health impacts of various pollutants (e.g., TVOCs are highly toxic and irritating, requiring priority treatment), while also taking into account system energy efficiency and operational rationality. Under the premise of ensuring indoor air quality safety, it effectively avoids unnecessary full-load operation, significantly improving the intelligence level, health protection capabilities, and overall performance of the fresh air system.

[0063] Specifically, such as Figures 3 to 7 As shown, the ventilation device 1 further includes: a housing 5, which has an installation space and multiple partitions. The partitions and heat recovery components 2 divide the installation space into independent air inlet channels 10 and exhaust channels 11. The housing 5 is provided with an air outlet 13 and an exhaust inlet 14 that communicate with the indoor side, as well as a fresh air inlet 15 and an exhaust outlet 16 that communicate with the outdoor side. The air outlet of the air inlet channel 10 is connected to the indoor side through the air outlet 13, and the air inlet of the exhaust channel 11 is connected to the indoor side through the exhaust inlet 14. The fresh air inlet 15 can be selectively connected to the air inlet of the air inlet channel 10, and the exhaust outlet 16 can be selectively connected to the air outlet of the exhaust channel 11.

[0064] With the above-described structure, multiple partitions and heat recovery components 2 are used inside the chassis 5 to construct independent, airflow-isolated air intake channels 10 and 11, effectively preventing cross-mixing of fresh and exhaust air and ensuring clear airflow and hygiene. Simultaneously, the chassis 5 is rationally arranged with an air outlet 13 and an exhaust inlet 14 connecting to the indoor side, and a fresh air inlet 15 and an exhaust outlet 16 connecting to the outdoor side, forming a complete bidirectional airflow path: fresh air enters through the fresh air inlet 15, is filtered and heat-exchanged through the air intake channel 10, and is then delivered into the room through the air outlet 13; polluted indoor air enters the exhaust channel 11 through the exhaust inlet 14, undergoes heat recovery, and is discharged outdoors through the exhaust outlet 16. The fresh air inlet 15 and the air intake channel 10, and the exhaust outlet 16 and the exhaust channel 11, employ a "selective connection" design, allowing the system to flexibly switch between heat exchange mode, fresh air mode, exhaust mode, or air purification mode based on air quality, temperature, humidity, and other parameters, achieving multi-functional integration. This integrated chassis structure not only improves the overall sealing, airtightness, and assembly reliability of the unit, but also optimizes the internal space layout, facilitating the modular installation and maintenance of the filter component 3, heat recovery component 2, and actuators. The overall design takes into account efficient ventilation, energy recovery, pollution backflow prevention, and intelligent control, making it particularly suitable for curtain wall or prefabricated buildings with high requirements for airtightness, energy efficiency, and health performance.

[0065] It should be noted that the multiple partitions inside the chassis 5 can be adjusted in shape and size according to design requirements to flexibly divide the installation space, thereby forming a reasonably structured and airflow-isolated air intake channel 10 and exhaust channel 11.

[0066] Furthermore, the heat recovery component 2 is disposed between the air inlet channel 10 and the air outlet channel 11. Internally, it has a first flow channel and a second flow channel that are independent but thermally coupled. The first flow channel forms part of the air inlet channel 10, and the second flow channel forms part of the air outlet channel 11. Through the coordinated structure of the partition inside the chassis 5 and the heat recovery component 2, the air inlet channel 10 and the air outlet channel 11 are completely physically isolated, ensuring that the fresh air or purified air does not mix with the exhaust air during flow. Heat (or cold air) is transferred only through the core of the heat recovery component 2, thereby achieving efficient energy recovery.

[0067] Furthermore, the fresh air inlet 15 and the recirculating air inlet 12 are positioned opposite each other, with the filter element 3 located above them. The exhaust outlet 16 and the fresh air inlet 15 are both located on the same outdoor-facing side of the casing 5, with the exhaust outlet 16 located above the fresh air inlet 15. The air outlet 13 and the exhaust inlet 14 are respectively located on opposite sides of the casing 5, and both are equipped with grilles for airflow guidance and protection.

[0068] Specifically, such as Figures 4 to 6As shown, the ventilation device 1 further includes: a second blocking component 6, which is rotatably disposed within the air inlet channel 10 and located at the fresh air inlet 15; the second blocking component 6 is used to block or avoid the fresh air inlet 15; the second blocking component 6 has a second blocking position and a second avoiding position. When the second blocking component 6 is in the second blocking position, the fresh air inlet 15 is disconnected from the air inlet end of the air inlet channel 10; when the second blocking component 6 is in the second avoiding position, the fresh air inlet 15 is connected to the air inlet end of the air inlet channel 10; wherein, the second blocking component 6 is communicatively connected to a control component, which is used to control the action of the second blocking component 6 according to the working mode of the ventilation device 1; when the ventilation device 1 enters the heat exchange mode or the fresh air mode, the control component controls the second blocking component 6 to move from the second blocking position to the second avoiding position.

[0069] By adopting the above-described structure, and by installing a second sealing component 6 within the air intake duct 10 and rotatably mounting it at the fresh air inlet 15, the ventilation device 1 can achieve precise and reliable control over the fresh air introduction path. Specifically: when the second sealing component 6 is in the second sealing position, the fresh air inlet 15 is completely disconnected from the air intake end of the air intake duct 10, effectively blocking the entry of outdoor air. This is suitable for operating scenarios where fresh air introduction is not required, such as air purification mode or exhaust mode. When the second sealing component 6 is in the second clearance position, the fresh air inlet 15 is connected to the air intake duct 10, allowing clean outdoor air to enter the system. This is suitable for heat exchange mode or fresh air mode. Therefore, the control component can automatically drive the second sealing component 6 to switch positions according to the current operating mode, enabling the ventilation device 1 to open the passage in a timely manner when fresh air is needed and completely close the inlet when fresh air is not required. This effectively avoids energy waste, prevents backflow of polluted outdoor air, and significantly improves the overall airtightness and operating efficiency of the unit. Meanwhile, the design ensures complete isolation of airflow paths between different operating modes (such as internal circulation purification and external circulation ventilation), eliminating potential airflow short circuits or cross-contamination during mode switching, and effectively guaranteeing the accuracy of control logic and the reliability of execution.

[0070] Furthermore, the second sealing component 6 includes: a second baffle 61, a second sealing door frame 62, and a second sealing element. The bottom end of the second baffle 61 is rotatably mounted in the air inlet channel 10 via a hinge shaft, allowing it to rotate relative to the fresh air inlet 15; the second sealing door frame 62 is fixed to the second baffle 61 and located on the side of the second baffle 61 closest to the fresh air inlet 15; the second sealing element is disposed around the periphery of the second sealing door frame 62. When the second sealing component 6 rotates from the second clearance position to the second sealing position, the second baffle 61 swings around the axis of the hinge shaft toward the fresh air inlet 15, causing the second sealing door frame 62 to fit against the opening of the fresh air inlet 15, and achieving effective sealing through the second sealing element, thereby reliably blocking airflow through the fresh air inlet 15. This structure not only has stable operation and good sealing performance, but also facilitates integration and maintenance, ensuring accurate switching and isolation of airflow paths in different operating modes of the ventilation device 1.

[0071] Furthermore, the second sealing component 6 is driven to rotate by a second motor, which is communicatively connected to the control component to precisely adjust the position of the second sealing component 6 according to control commands, thereby realizing the automatic opening or closing of the fresh air inlet 15.

[0072] Specifically, such as Figures 5 to 7 As shown, the ventilation device 1 further includes: a third blocking component 7, which is rotatably disposed within the exhaust duct 11 and located at the exhaust outlet 16; the third blocking component 7 is used to block or avoid the exhaust outlet 16; the third blocking component 7 has a third blocking position and a third avoiding position. When the third blocking component 7 is in the third blocking position, the exhaust outlet 16 is disconnected from the air outlet of the exhaust duct 11; when the third blocking component 7 is in the third avoiding position, the exhaust outlet 16 is connected to the air outlet of the exhaust duct 11; wherein, the third blocking component 7 is communicatively connected to a control component, which is used to control the action of the third blocking component 7 according to the working mode of the ventilation device 1; when the ventilation device 1 enters the heat exchange mode or the exhaust mode, the control component controls the third blocking component 7 to move from the third blocking position to the third avoiding position.

[0073] By employing the aforementioned structural design, and precisely positioning a rotatable third sealing component 7 within the exhaust duct 11 at the exhaust outlet 16, intelligent on / off control of the exhaust path is achieved. When the ventilation device 1 operates in heat exchange or exhaust mode, the control unit drives the third sealing component 7 to switch to the third clearance position, connecting the exhaust outlet 16 with the exhaust duct 11 to ensure efficient exhaust of polluted air. In modes where exhaust is not required, such as air purification, the third sealing component 7 remains in the third sealing position, completely cutting off the exhaust path and preventing outdoor cold / hot air or pollutants from flowing back into the room through the exhaust outlet. This structure not only effectively improves the airtightness and backflow prevention capability of the ventilation device 1 but also avoids energy loss caused by unnecessary exhaust. Furthermore, it ensures the independence of airflow paths and the reliability of control logic between different operating modes, further enhancing the energy efficiency, safety, and operational stability of the fresh air system under complex operating conditions.

[0074] Furthermore, the third sealing component 7 includes: a third baffle 71, a third sealing door frame 72, and a third sealing element. The top of the third baffle 71 is rotatably mounted in the exhaust duct 11 via a hinge shaft, allowing it to rotate relative to the exhaust outlet 16; the third sealing door frame 72 is fixed to the third baffle 71 and located on the side of the third baffle 71 closest to the exhaust outlet 16; the third sealing element is disposed around the periphery of the third sealing door frame 72. When the third sealing component 7 rotates from the third clearance position to the third sealing position, the third baffle 71 swings around the axis of the hinge shaft toward the exhaust outlet 16, causing the third sealing door frame 72 to fit against the opening of the exhaust outlet 16, and achieving effective sealing through the third sealing element, thereby reliably blocking airflow through the exhaust outlet 16. This structure not only has stable operation and good sealing performance, but is also easy to integrate and maintain, ensuring accurate switching and isolation of airflow paths in different operating modes of the ventilation device 1.

[0075] Furthermore, the third sealing component 7 is driven to rotate by a third motor, which is communicatively connected to the control component to precisely adjust the position of the third sealing component 7 according to the control command, thereby realizing the automatic opening or closing of the exhaust outlet 16.

[0076] Specifically, such as Figure 2 ,as well as Figures 4 to 6 As shown, the ventilation device 1 also includes: an air supply fan 8, which is installed in the air inlet channel 10 and located above the heat recovery component 2. The input and output ends of the air supply fan 8 are connected to the air inlet channel 10. The air supply fan 8 is used to drive air to flow in the air inlet channel 10, so that the air passes through the heat recovery component 2 and is sent into the indoor side through the air outlet 13.

[0077] With the above-described structural configuration, an air supply fan 8 is installed within the air inlet channel 10 and positioned above the heat recovery component 2. The input end of the air supply fan 8 is connected to the output end of the first flow channel of the heat recovery component 2, and its output end is connected to the air outlet 13, effectively driving air to flow directionally along the air inlet channel 10. During operation, outdoor fresh air or indoor recirculated air passes through the heat recovery component 2 and is then pressurized and delivered by the air supply fan 8, ensuring that clean air is stably and efficiently delivered into the room through the air outlet 13. This layout not only optimizes the airflow path, reduces flow resistance, and improves heat exchange efficiency and airflow uniformity, but also avoids direct impact from the fan on the filter component 3 or the heat recovery core, extending the service life of key components. Simultaneously, the precise configuration of the air supply fan 8 enhances the system's ability to regulate airflow in different modes (such as fresh air, heat exchange, or internal circulation purification), significantly improving the overall ventilation efficiency, comfort, and energy efficiency of the unit.

[0078] Furthermore, the air supply fan 8 is connected to the control unit for communication. The control unit can dynamically adjust the speed of the air supply fan 8 according to the current operating mode, air quality requirements, or user needs, thereby accurately controlling the air supply volume and achieving an optimized match between air volume and energy efficiency.

[0079] Specifically, such as Figure 2 and Figure 7 As shown, the ventilation device 1 also includes an exhaust fan 9, which is installed in the exhaust duct 11. The exhaust fan 9 is located at the air outlet of the exhaust duct 11, and both the input and output ends of the exhaust fan 9 are connected to the exhaust duct 11. The exhaust fan 9 is used to drive indoor air into the exhaust duct 11 through the exhaust inlet 14, and after flowing through the heat recovery component 2, it is discharged to the outdoor side through the exhaust outlet 16.

[0080] By adopting the above-described structural configuration, an exhaust fan 9 is installed at the outlet end of the exhaust duct 11, with its input end connected to the output end of the second flow channel of the heat recovery component 2 and its output end connected to the exhaust outlet 16. This effectively drives indoor polluted air to enter from the exhaust inlet 14, flow through the exhaust duct 11 and the heat recovery component 2, and then be pressurized and discharged outdoors by the exhaust fan 9. This layout not only ensures stable and smooth exhaust airflow and improves heat recovery efficiency, but also avoids exhaust obstruction caused by insufficient natural pressure difference. This structure significantly improves the exhaust reliability, energy recovery rate, and environmental adaptability of the fresh air system, providing a strong guarantee for efficient, healthy, and energy-saving indoor ventilation.

[0081] Furthermore, the exhaust fan 9 is connected to the control unit for communication. The control unit can dynamically adjust the speed of the exhaust fan 9 according to the current operating mode, air quality requirements, or user needs, thereby accurately controlling the air volume and achieving an optimized match between air volume and energy efficiency.

[0082] Furthermore, sound-absorbing cotton is installed around both the supply fan 8 and the exhaust fan 9 to effectively reduce the aerodynamic noise and mechanical vibration generated during the operation of the fans, thereby improving the overall quietness and user comfort of the machine.

[0083] Optionally, the air circulation process of ventilation device 1 in different operating modes is as follows: 1. Heat exchange mode The first blocking component 4 is in the first blocking position, the second blocking component 6 is in the second avoidance position, and the third blocking component 7 is in the third avoidance position; the supply fan 8 and the exhaust fan 9 start synchronously.

[0084] Outdoor fresh air enters the air intake duct 10 through the fresh air inlet 15, and passes sequentially through the first circulation channel of the filter component 3 and the heat recovery component 2; simultaneously, indoor stale air enters the second circulation channel of the heat recovery component 2 through the exhaust inlet 14. After heat exchange between the fresh air and exhaust air in the heat recovery component 2, the clean fresh air flows out of the heat recovery component 2, is pressurized by the supply fan 8, and is sent into the room through the supply fan 8 and the air outlet 13; the exhaust air, after heat exchange, flows out of the heat recovery component 2, is pressurized by the exhaust fan 9, and is discharged to the outside through the exhaust fan 9 and the exhaust outlet 16.

[0085] Among them, such as Figure 4 As shown, arrow A indicates the direction of fresh air flow, and arrow B indicates the direction of exhaust air flow.

[0086] 2. Fresh air mode The first blocking component 4 is in the first blocking position, the second blocking component 6 is in the second avoidance position, and the third blocking component 7 is in the third blocking position; only the air supply fan 8 is started.

[0087] Outdoor fresh air enters the air intake duct 10 through the fresh air inlet 15, passes through the first flow channel of the filter component 3 and the heat recovery component 2 (at this time there is no exhaust airflow and the heat recovery function is not activated), and then flows out from the heat recovery component 2. After being pressurized by the supply fan 8, it is delivered into the room through the supply fan 8 and the air outlet 13. This mode is suitable for scenarios that require supplemental fresh air but do not require exhaust or energy recovery.

[0088] 3. Exhaust Mode The first blocking component 4 is in the first blocking position, the second blocking component 6 is in the second blocking position, and the third blocking component 7 is in the third avoidance position; only the exhaust fan 9 is started.

[0089] Indoor air enters the second circulation channel of the heat recovery component 2 through the exhaust inlet 14. After the exhaust air flows out of the heat recovery component 2, it is pressurized by the exhaust fan 9 and discharged to the outside through the exhaust fan 9 and the exhaust outlet 16.

[0090] 4. Air purification mode The first blocking component 4 is in the first avoidance position, the second blocking component 6 is in the second blocking position, and the third blocking component 7 is in the third blocking position; only the air supply fan 8 is started.

[0091] Indoor air enters the air intake channel 10 through the circulating air inlet 12, passes through the first flow channel of the filter component 3 and the heat recovery component 2 (which only serves as an airflow channel and does not exchange heat), and then flows out from the heat recovery component 2. It is then pressurized by the air supply fan 8 and sent back to the room through the air supply fan 8 and the air outlet 13, forming a closed internal circulation purification loop.

[0092] The above modes achieve complete isolation and on-demand switching of airflow paths by precisely coordinating the start and stop status of the three blocking components and the fan. This ensures that the system operates efficiently, energy-savingly, and safely under different operating conditions, while avoiding interference between modes or cross-contamination of pollutants, significantly improving the intelligence level and environmental adaptability of the fresh air system.

[0093] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0094] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0095] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0096] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0097] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A fresh air system, characterized in that The new air system comprises: at least one ventilation device (1) for being installed at an installation position of a curtain wall, the ventilation device (1) having an installation space, the installation space having an air inlet channel (10) and an air outlet channel (11) arranged independently, an air inlet end of the air inlet channel (10) being selectively communicated with an outdoor side, an air outlet end of the air inlet channel (10) being communicated with an indoor side, the air inlet channel (10) being used for introducing fresh air at the outdoor side to the indoor side; an air inlet end of the air outlet channel (11) being communicated with the indoor side, an air outlet end of the air outlet channel (11) being selectively communicated with the outdoor side, the air outlet channel (11) being used for discharging air at the indoor side to the outdoor side; the ventilation device (1) further has a heat recovery component (2) arranged in the installation space; the heat recovery component (2) has a first flow channel and a second flow channel arranged independently, the first flow channel constituting at least part of the air inlet channel (10), the second flow channel constituting at least part of the air outlet channel (11); the heat recovery component (2) is used for heat exchanging fresh air flowing through the first flow channel with exhaust air flowing through the second flow channel; a control component is used for acquiring an indoor temperature at the current indoor side, an outdoor temperature at the current outdoor side and an air quality at the current indoor side, and adaptively adjusting a working mode of the ventilation device (1) according to an absolute value of a temperature difference between the current indoor temperature and the current outdoor temperature and / or the air quality at the current indoor side; wherein when the control component adjusts the working mode of the ventilation device (1) to a heat exchange mode, the air inlet end of the air inlet channel (10) is communicated with the outdoor side, and the air outlet end of the air outlet channel (11) is communicated with the outdoor side.

2. The fresh air system of claim 1, wherein, The new air system further comprises: a first detection component arranged at the indoor side, the first detection component being communicatively connected with the control component, the first detection component being used for detecting an indoor temperature and sending a detected indoor temperature value to the control component; a second detection component arranged at the indoor side, the second detection component being communicatively connected with the control component, the second detection component being used for detecting a carbon dioxide concentration at the indoor side and sending a detected carbon dioxide concentration value to the control component; the control component is used for calculating a temperature difference by acquiring a current indoor temperature value and a current outdoor temperature value, and selectively controlling the ventilation device (1) to enter the heat exchange mode or the fresh air mode according to an absolute value of the temperature difference and a current carbon dioxide concentration value acquired. When the absolute value of the temperature difference is greater than or equal to a preset temperature value and the current carbon dioxide concentration value is greater than or equal to a first preset concentration value, the control component controls the ventilation device (1) to enter the heat exchange mode; when the absolute value of the temperature difference is less than the preset temperature value and the current carbon dioxide concentration value is greater than or equal to the first preset concentration value, the control component controls the ventilation device (1) to enter a fresh air mode.

3. The fresh air system of claim 1, wherein, The fresh air system further comprises: a first detection member arranged on the indoor side, the first detection member being in communication connection with the control component, the first detection member being configured to detect an indoor temperature and send a detected indoor temperature value to the control component; a third detection member arranged on the indoor side, the third detection member being in communication connection with the control component, the third detection member being configured to detect an indoor particulate matter concentration and send a detected indoor particulate matter concentration value to the control component; The control component calculates a temperature difference by using the obtained current indoor temperature value and current outdoor temperature value, and selectively controls the ventilation device (1) to enter the heat exchange mode or air purification mode according to the absolute value of the temperature difference and the obtained current indoor particulate matter concentration value and current outdoor particulate matter concentration. When the absolute value of the temperature difference is greater than or equal to a preset temperature value and the indoor particulate matter concentration is greater than or equal to a second preset concentration value, if the indoor particulate matter concentration is greater than the outdoor particulate matter concentration, the control component controls the ventilation device (1) to enter the heat exchange mode; if the indoor particulate matter concentration is less than or equal to the outdoor particulate matter concentration, the control component controls the ventilation device (1) to enter the air purification mode; when the absolute value of the temperature difference is less than the preset temperature value and the indoor particulate matter concentration is greater than or equal to the second preset concentration value, the control component controls the ventilation device (1) to enter the air purification mode.

4. The fresh air system of claim 3, wherein, The ventilation device (1) is provided with a circulating air inlet (12) and an air outlet (13) in communication with the indoor side, the circulating air inlet (12) can selectively communicate with an air inlet end of the air inlet channel (10), and an air outlet end of the air inlet channel (10) communicates with the indoor side through the air outlet (13); the ventilation device (1) further comprises: a filtering component (3) arranged in the air inlet channel (10), and the filtering component (3) is located at the air inlet end of the air inlet channel (10), and the filtering component (3) is configured to filter air entering the air inlet channel (10); When the control component controls the ventilation device (1) to enter the air purification mode, the circulating air inlet (12) communicates with the air inlet end of the air inlet channel (10), so that indoor air enters the air inlet end of the air inlet channel (10) through the circulating air inlet (12), and after being filtered by the filtering component (3), returns to the indoor side from the air outlet (13).

5. The fresh air system of claim 4, wherein, The ventilation device (1) further comprises a first blocking component (4) rotatably arranged at the circulating air inlet (12) and located in the air inlet channel (10), the first blocking component (4) is used for blocking or avoiding the circulating air inlet (12), and the first blocking component (4) has a first blocking position for blocking the circulating air inlet (12) and a first avoiding position for avoiding the circulating air inlet (12); The first blocking component (4) is in communication connection with the control component, and the control component is used for controlling the action of the first blocking component (4) according to the working mode of the ventilation device (1); when the ventilation device (1) enters the air purification mode, the control component controls the first blocking component (4) to move from the first blocking position to the first avoiding position.

6. The fresh air system of claim 1, wherein, The fresh air system further comprises a fourth detection member arranged on the indoor side, the fourth detection member is in communication connection with the control component, and the fourth detection member is used for detecting the total volatile organic compound concentration on the indoor side and sending the detected total volatile organic compound concentration value to the control component; the control component compares the obtained current total volatile organic compound concentration value with a third preset concentration value, and controls whether the ventilation device (1) enters the heat exchange mode according to the comparison result; When the total volatile organic compound concentration value is greater than or equal to the third preset concentration value, the control component controls the ventilation device (1) to enter the heat exchange mode; if the total volatile organic compound concentration value is less than the third preset concentration value, the control component controls the ventilation device (1) to maintain the current working mode.

7. The fresh air system of claim 1, wherein, The ventilation device (1) further comprises a cabinet (5), the cabinet (5) is provided with the mounting space, a plurality of partitions are arranged in the mounting space, and the plurality of partitions and the heat recovery component (2) are used for dividing the mounting space into the air inlet channel (10) and the exhaust air channel (11) which are independent of each other; the cabinet (5) is provided with an air outlet (13) and an exhaust air inlet (14) in communication with the indoor side and a fresh air inlet (15) and an exhaust air outlet (16) in communication with the outdoor side at intervals, an air outlet end of the air inlet channel (10) is in communication with the indoor side through the air outlet (13), and an air inlet end of the exhaust air channel (11) is in communication with the indoor side through the exhaust air inlet (14); the fresh air inlet (15) is selectively in communication with the air inlet end of the air inlet channel (10), and the exhaust air outlet (16) is selectively in communication with the air outlet end of the exhaust air channel (11).

8. The fresh air system of claim 7, wherein, The ventilation device (1) further comprises: A second blocking component (6) is rotatably arranged in the air inlet channel (10) and located at the fresh air inlet (15); the second blocking component (6) is used for blocking or avoiding the fresh air inlet (15); the second blocking component (6) has a second blocking position and a second avoiding position; when the second blocking component (6) is in the second blocking position, the fresh air inlet (15) is disconnected from the air inlet end of the air inlet channel (10); when the second blocking component (6) is in the second avoiding position, the fresh air inlet (15) is in communication with the air inlet end of the air inlet channel (10); The second blocking component (6) is in communication connection with the control component, and the control component is used for controlling the action of the second blocking component (6) according to the working mode of the ventilation device (1); when the ventilation device (1) enters the heat exchange mode or the fresh air mode, the control component controls the second blocking component (6) to move from the second blocking position to the second avoiding position.

9. The fresh air system of claim 7, wherein, The ventilation device (1) further comprises a third blocking component (7) rotatably arranged in the air outlet channel (11) and located at the air outlet (16); the third blocking component (7) is used for blocking or avoiding the air outlet (16); the third blocking component (7) has a third blocking position and a third avoiding position; when the third blocking component (7) is in the third blocking position, the air outlet (16) is disconnected from the air outlet end of the air outlet channel (11); when the third blocking component (7) is in the third avoiding position, the air outlet (16) is in communication with the air outlet end of the air outlet channel (11); The third blocking component (7) is in communication connection with the control component, and the control component is used for controlling the action of the third blocking component (7) according to the working mode of the ventilation device (1); when the ventilation device (1) enters the heat exchange mode or the fresh air mode, the control component controls the third blocking component (7) to move from the third blocking position to the third avoiding position.

10. The fresh air system of claim 7, wherein, The ventilation device (1) further comprises: An air supply fan (8) is arranged in the air inlet channel (10), and the air supply fan (8) is located above the heat recovery component (2); the input end and the output end of the air supply fan (8) are in communication with the air inlet channel (10); the air supply fan (8) is used for driving air to flow in the air inlet channel (10), so that the air passes through the heat recovery component (2) and is sent into the indoor side through the air outlet (13); and / or, An exhaust fan (9) is arranged in the exhaust air passage (11), and the input end and the output end of the exhaust fan (9) are both communicated with the exhaust air passage (11); the exhaust fan (9) is used to drive indoor air to enter the exhaust air passage (11) through the exhaust air inlet (14), and after flowing through the heat recovery component (2), the indoor air is discharged to the outdoor side through the exhaust air outlet (16).

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