Energy-saving outdoor air conditioner cabinet for fresh air air conditioner

Abstract

This invention relates to the field of outdoor air conditioning cabinet technology, and discloses an energy-saving outdoor air conditioning cabinet with fresh air intake, comprising an integrated section for fresh air and exhaust air and an integrated section for supply and return air; between these two sections are sequentially arranged an energy recovery section, a medium-efficiency filtration section, a temperature and humidity control section, and a dual-fan section; the energy recovery section includes a total heat exchange chamber, the interior of which is divided into a heat exchange cavity and a fan cavity, and a detachable total heat exchange core is slidably installed inside the heat exchange cavity via a drawer-type guide rail; the total heat exchange core is provided with a zoned defrosting structure and a defrosting guide structure. This invention specifically solves the problem of high energy consumption and low efficiency of traditional overall defrosting caused by uneven frosting of the inclined total heat exchange core, significantly reducing defrosting energy consumption. It completely avoids the problem of defrosting water residue freezing and clogging the core's ventilation channels, extending the unit's continuous operating time under low-temperature conditions.

Description

Technical Field

[0001] This invention relates to the field of outdoor air conditioning cabinet technology, specifically to an energy-saving fresh air conditioning outdoor air conditioning cabinet. Background Technology

[0002] The outdoor air conditioning cabinet is an integrated outdoor air handling unit that integrates fresh air intake, polluted air exhaust, air purification, total heat energy recovery, and indoor temperature and humidity regulation. It can be directly installed on the exterior wall, roof, or outdoor platform of a building without occupying indoor building space. It can provide a continuous, stable, high-quality indoor air environment and energy-saving air conditioning services for various residential, commercial office, and industrial plants.

[0003] Existing technology discloses a split-type outdoor cabinet air conditioner, application number CN202410366948.2, which relates to the field of cabinet air conditioning technology. It includes an outdoor unit with a refrigerant inlet pipe installed on one side. An expansion valve is fixedly connected to one end of the refrigerant inlet pipe, and an indoor unit is installed at one end of the expansion valve. In this invention, when installing the indoor unit, only a few through holes for fixing the indoor unit and one through hole for inserting a rotating shaft into the cabinet need to be drilled on the side wall of the cabinet. This eliminates the need for large-area cutting of through slots, saving construction time and reducing construction difficulty. Installation is convenient. Because the evaporator covers the fan, the fan blows air in all directions when rotating, not just in one direction, thus evenly distributing cool air into the cabinet and uniformly lowering the temperature inside. The indoor unit can be connected horizontally, thereby increasing its airflow area and achieving expanded functionality.

[0004] However, existing technologies, especially this particular solution, still have the following problems: The problem of low-temperature frosting in the total heat exchange core has not been resolved: the non-uniform frosting characteristics of the total heat exchange core have not been optimized, which makes the core prone to frosting and blockage, rapid decay of heat recovery efficiency, and secondary icing during the defrosting process, which greatly shortens the service life of the core.

[0005] Poor adaptability to low-temperature conditions in winter: Under traditional heat pump heating mode, the outdoor unit is prone to frost and needs to be stopped frequently for defrosting, resulting in large fluctuations in indoor temperature; when the ambient temperature is below -5℃, the heating efficiency drops sharply or even fails to start normally, which cannot meet the heating needs of northern winters. Summary of the Invention

[0006] The purpose of this invention is to provide a technical solution to address the problems in the prior art mentioned in the background section.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An energy-saving outdoor air conditioning cabinet for fresh air conditioning includes: an integrated section for fresh air and exhaust air and an integrated section for supply air and return air; The two sections are sequentially configured as an energy recovery section, a medium-efficiency filtration section, a temperature and humidity treatment section, and a dual-fan section. The energy recovery section includes a total heat exchange box, the interior of which is divided into a heat exchange chamber and a fan chamber. A detachable total heat exchange core is slidably installed inside the heat exchange chamber via a drawer-type guide rail. The total heat exchange core is provided with a zoned defrosting structure and a defrosting flow guiding structure; The partitioned defrosting structure is used to divide the surface of the total heat exchange core into multiple independent defrosting partitions along the oblique height, and the on / off state of each defrosting partition can be controlled independently to achieve gradient defrosting. The defrosting guide structure is used to direct and concentrate the defrosting water generated on the surface of the total heat exchange core and discharge it to prevent defrosting water residue from freezing.

[0008] Preferably, the partitioned defrosting structure includes an installation frame and at least two partitioned baffles. The installation frame is installed on the side of the total heat exchange core, and multiple partitioned baffles are installed parallel to and rotatably on the installation frame along the oblique height direction of the total heat exchange core, dividing the ventilation channel of the total heat exchange core into at least two independent defrosting partitions along the oblique height.

[0009] Preferably, the side of the mounting frame is provided with multiple drive motors, which are used to drive multiple partition baffles to rotate synchronously or independently to open or close the corresponding defrosting partition.

[0010] Preferably, there are three partitioned baffles, which divide the exhaust channel of the total heat exchange core into three independent defrosting zones (upper, middle, and lower) along the oblique height direction; the rotation angle range of the partitioned baffles is 0 degrees to 90 degrees, when 90 degrees the exhaust channel of the corresponding zone is fully opened, and when 0 degrees the exhaust channel of the corresponding zone is completely sealed.

[0011] Preferably, the defrosting guide structure includes a guide channel and a collection cavity. The guide channel is obliquely disposed on the surface of the total heat exchange core and extends to the bottom edge of the total heat exchange core. The collection cavity is disposed at the bottom of the total heat exchange core and is used to collect the defrosting water guided by the guide channel and the defrosting water flowing directly down the surface of the total heat exchange core. The inner wall of the flow channel and the inner wall of the collection chamber are both coated with a hydrophobic coating; the collection chamber is configured as an inverted triangular structure, and the bottom of the collection chamber is connected to the drain pipe through a connecting pipe. A discharge pump is installed on the drain pipe, and the outlet end of the drain pipe extends to the outside of the total heat exchange box.

[0012] Preferably, the exhaust inlet frame of the total heat exchange core is also provided with a vibration defrosting structure to remove the defrosting water and initial frost layer formed on the surface of the total heat exchange core, and to prevent frost and ice from blocking the ventilation channel of the total heat exchange core. The total heat exchange core is a plate-type cross-flow total heat exchange core, which is installed inside the heat exchange chamber in an oblique manner; the fresh air duct of the total heat exchange core extends from the lower left to the upper right, and the exhaust air duct extends from the upper left to the lower right, with the two sets of ducts isolated from each other.

[0013] Preferably, the vibration defrosting structure includes multiple vibrators and multiple elastic paddles; the multiple vibrators are rigidly fixed and evenly distributed on the frame of the ventilation channel of the guide groove and the total heat exchange core.

[0014] Preferably, it also includes a controller electrically connected to all drive motors, all vibrators, and the discharge pump, the controller being configured to execute a three-level progressive linkage defrosting control method, the steps of which are as follows: S1 Pre-detection stage: Real-time detection of the pressure difference ΔP between the inlet and outlet of the total heat exchange core. When ΔP reaches the first threshold P1, the initial defrosting mode is entered. S2 Initial Defrosting Mode: The controller starts all vibrators to vibrate intermittently at the first frequency f1, each vibration lasting 10 seconds, with a 30-second interval, for a total of 5 minutes; at the same time, the discharge pump is controlled to run at a low speed to empty the water in the collection chamber in advance. S3 Gradient Defrosting Mode: If ΔP is still greater than P1 after S2, the gradient defrosting mode is entered. The controller first closes the partition baffles of the upper and middle defrosting zones, and only opens the lower defrosting zone. At the same time, the exhaust fan of the dual fan section is started to run at 50% of the rated speed to introduce indoor hot air into the lower defrosting zone for defrosting. After running for T1 time, the partition baffle of the middle defrosting zone is opened, and the process continues for T2 time. Finally, the partition baffle of the upper defrosting zone is opened, and the process continues for T3 time. S4 Final Stage: After all zones have finished defrosting, the controller restarts all vibrators at the second frequency f2 for 30 seconds to shake off the water droplets remaining on the core surface; at the same time, the discharge pump is controlled to run at high speed for 2 minutes to completely empty the defrosting water in the collection chamber. Among them, T1>T2>T3, f2>f1.

[0015] Preferably, the controller is also configured to perform zone fault isolation and adaptive airflow adjustment functions: When a damage to the heat exchange membrane in a defrosting zone is detected, causing cross-contamination between fresh air and exhaust air, the controller controls the corresponding zone's baffle to remain completely closed at 0 degrees Celsius, isolating the faulty zone, while the remaining zones operate normally. When the indoor carbon dioxide concentration is lower than the set threshold, the controller linearly adjusts the opening angle of all zone baffles between 30 and 90 degrees based on the real-time carbon dioxide concentration value, thereby achieving continuous stepless adjustment of the exhaust air volume.

[0016] Preferably, the integrated fresh air and exhaust air section is provided with a fresh air inlet and an exhaust air outlet, and the integrated air supply and return air section is provided with a return air inlet and an air supply outlet; The fan chamber of the total heat exchange box is divided into two independent chambers by a partition, and a centrifugal fan is installed in each chamber. The top of the total heat exchange box is provided with an exhaust inlet and a fresh air outlet, and the bottom is provided with a fresh air duct and an exhaust duct.

[0017] Technical effects and advantages of the present invention: The energy-saving outdoor air conditioning cabinet for fresh air conditioning proposed in this invention has the following advantages compared with the prior art: This invention features a partitioned defrosting structure and a defrosting guide structure on a total heat exchange core that can be detachably installed using drawer-type guide rails. This divides the surface of the total heat exchange core into multiple independent defrosting zones along an oblique height. By independently controlling the on / off state of each defrosting zone, gradient defrosting is achieved, allowing defrosting energy to be precisely applied to the frosting area. At the same time, the water generated during defrosting is directed and discharged in a concentrated manner to prevent defrosting water from remaining on the core surface and freezing.

[0018] This design specifically addresses the high energy consumption and low efficiency of traditional integral defrosting caused by uneven frosting in the angled total heat exchange core, significantly reducing defrosting energy consumption. It completely avoids the problem of defrost water residue freezing and clogging the core's ventilation channels, extending the unit's continuous operating time under low-temperature conditions. The detachable installation structure of the total heat exchange core greatly simplifies the core's maintenance and replacement process. All improved structures are integrated within the energy recovery section, without disrupting the unit's original modular layout, facilitating production and on-site installation. Attached Figure Description

[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of an outdoor air conditioning cabinet for an energy-saving fresh air conditioner according to the present invention; Figure 2 This is the second three-dimensional structural schematic diagram of an outdoor air conditioning cabinet for an energy-saving fresh air conditioner according to the present invention; Figure 3 This is a front structural diagram of an outdoor air conditioning cabinet for an energy-saving fresh air conditioner according to the present invention. Figure 4 This is one of the structural schematic diagrams of the total heat exchange box in an embodiment of the present invention; Figure 5 This is the second schematic diagram of the structure of the total heat exchange box in an embodiment of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A; Figure 7 This is a side view of the structure such as the total heat exchange core in an embodiment of the present invention; Figure 8This is a three-dimensional schematic diagram of the structure such as the total heat exchange core in the embodiment of the present invention. In the picture: 11. Fresh air and exhaust integrated section; 12. Energy recovery section; 13. Medium-efficiency filtration section; 14. Temperature and humidity control section; 15. Dual fan section; 16. Supply air and return air integrated section; 17. Fresh air inlet; 18. Exhaust air outlet; 19. Return air inlet; 110. Supply air outlet; 21. Total heat exchange chamber; 22. Centrifugal fan; 23. Heat exchange cavity; 24. Total heat exchange core; 25. Drawer-type guide rail; 26. Exhaust air inlet; 27. Fresh air outlet; 28. Fresh air duct; 29. ​​Exhaust air duct; 210. Mounting frame; 211. Zone baffle; 212. Drive motor; 213. Guide channel; 214. Connecting pipe; 215. Collection chamber; 216. Drainage pipe; 217. Discharge pump; 218. Vibrator. Detailed Implementation

[0020] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0021] The invention provides, for example Figures 1 to 8 As shown, an energy-saving outdoor air conditioning cabinet for fresh air conditioning includes: Fresh air and exhaust integrated section 11 and supply air and return air integrated section 16; The two sections are sequentially configured as an energy recovery section 12, a medium-efficiency filtration section 13, a temperature and humidity treatment section 14, and a dual-fan section 15. The energy recovery section 12 includes a total heat exchange box 21, the interior of which is divided into a heat exchange chamber 23 and a fan chamber. A detachable total heat exchange core 24 is slidably installed inside the heat exchange chamber 23 via a drawer-type guide rail 25. The total heat exchange core 24 is provided with a zoned defrosting structure and a defrosting flow guiding structure; The partitioned defrosting structure is used to divide the surface of the total heat exchange core 24 into multiple independent defrosting partitions along the oblique height, and the on / off state of each defrosting partition can be controlled independently to achieve gradient defrosting. The defrosting guide structure is used to direct and concentrate the defrosting water generated on the surface of the total heat exchange core 24 to prevent defrosting water residue from freezing.

[0022] Working principle: By setting up a partitioned defrosting structure and a defrosting guide structure on the total heat exchange core 24 which can be detachably installed using drawer-type guide rails 25, the surface of the total heat exchange core 24 is divided into multiple independent defrosting zones along the oblique height. Gradient defrosting is achieved by independently controlling the on and off of each defrosting zone, so that the defrosting energy is precisely applied to the frosting area. At the same time, the water generated by defrosting is directed and discharged in a concentrated manner to prevent defrosting water from remaining on the surface of the core 24 and freezing.

[0023] This design specifically addresses the high energy consumption and low efficiency of traditional integral defrosting caused by uneven frosting on the inclined total heat exchange core 24, significantly reducing defrosting energy consumption. It completely avoids the problem of defrost water residue freezing and clogging the core's ventilation channels, extending the unit's continuous operating time under low-temperature conditions. The detachable installation structure of the total heat exchange core 24 greatly simplifies the core's maintenance and replacement process. All improved structures are integrated inside the energy recovery section 12, without disrupting the unit's original modular layout, facilitating production and on-site installation.

[0024] Regarding the partitioned defrosting implementation method of the total heat exchange core 24, this solution adopts a modular frame-type wind deflector structure. The partitioned defrosting structure includes a mounting frame 210 and at least two partitioned wind deflectors 211. The mounting frame 210 is installed on the side of the total heat exchange core 24, and multiple partitioned wind deflectors 211 are installed parallel to and rotatably on the mounting frame 210 along the inclined height direction of the total heat exchange core 24, dividing the ventilation channel of the total heat exchange core 24 into at least two independent defrosting partitions along the inclined height.

[0025] To achieve independent and precise control of each defrosting zone and avoid mutual interference between areas with different frost levels, this embodiment configures an independent drive unit for each zone baffle 211. Multiple drive motors 212 are provided on the side of the mounting frame 210 to drive multiple zone baffles 211 to rotate synchronously or independently to open or close the corresponding defrosting zone.

[0026] It should be noted that this embodiment adopts an optimal defrosting layout with three zones, which can match the temperature gradient distribution characteristics of the inclined core. There are three partition baffles 211, which divide the exhaust channel of the total heat exchange core 24 into three independent defrosting zones along the inclined height direction. The rotation angle range of the partition baffles 211 is 0 degrees to 90 degrees. When the angle is 90 degrees, the exhaust channel of the corresponding zone is fully opened, and when the angle is 0 degrees, the exhaust channel of the corresponding zone is completely sealed.

[0027] To address the unique problem of defrosting water in inclined heat exchange cores easily accumulating along the slope and freezing at the bottom, this solution designs an integrated defrosting flow guiding and collection system. The defrosting flow guiding structure includes a flow guiding channel 213 and a collection chamber 215. The flow guiding channel 213 is inclinedly positioned on the surface of the heat exchange core 24 and extends to the bottom edge of the heat exchange core 24. The collection chamber 215 is located at the bottom of the heat exchange core 24 and is used to collect the defrosting water flowing under the flow guiding channel 213 and the defrosting water flowing directly down the surface of the heat exchange core 24. The inner wall of the guide channel 213 and the inner wall of the collection chamber 215 are both coated with a hydrophobic coating; the collection chamber 215 is configured as an inverted triangular structure, and the bottom of the collection chamber 215 is connected to the drain pipe 216 through the connecting pipe 214. The drain pipe 216 is equipped with a discharge pump 217, and the outlet end of the drain pipe 216 extends to the outside of the total heat exchange box 21.

[0028] As an important supplement to the defrosting system, this embodiment adds an active vibration defrosting structure at the inlet of the total heat exchange core 24. A vibration defrosting structure is also provided on the frame of the exhaust inlet 26 of the total heat exchange core 24 to remove defrost water and initial frost layer formed on the surface of the total heat exchange core 24, preventing frost and ice from blocking the ventilation channels of the total heat exchange core 24. The total heat exchange core 24 is a plate-type cross-flow total heat exchange core, which is installed inside the heat exchange chamber 23 at a 45-degree angle; the fresh air duct of the total heat exchange core 24 extends from the lower left to the upper right, and the exhaust air duct extends from the upper left to the lower right, with the two sets of ducts isolated from each other.

[0029] Regarding the specific selection and arrangement of the vibration defrosting structure, this scheme adopts a combination of low-power high-frequency electromagnetic vibrators and elastic levers. The vibration defrosting structure includes multiple vibrators 218 and multiple elastic levers; the multiple vibrators 218 are rigidly fixed and evenly distributed on the frame of the ventilation channel of the guide groove 213 and the total heat exchange core 24; The vibrator 218 is a miniature electromagnetic vibrator with a rated power of 3-8W and a vibration frequency of 40-60Hz; the elastic pawl is made of stainless steel spring steel sheet with a thickness of 0.08-0.15mm, and its free end is provided with an arc-shaped air guide that bends into the ventilation channel.

[0030] To maximize defrosting efficiency and reduce defrosting energy consumption, this embodiment proposes a three-level progressive linkage defrosting control logic based on differential pressure detection. It also includes a controller electrically connected to all drive motors 212, all vibrators 218, and the discharge pump 217, configured to execute the three-level progressive linkage defrosting control method, with the following steps: S1 Pre-detection stage: Real-time detection of the pressure difference ΔP between the inlet and outlet of the total heat exchange core 24. When ΔP reaches the first threshold P1, the initial defrosting mode is entered. S2 Initial Defrosting Mode: The controller starts all vibrators 218 to vibrate intermittently at the first frequency f1, each vibration lasting 10 seconds, with a 30-second interval, for a total of 5 minutes; at the same time, the discharge pump 217 is controlled to run at a low speed to empty the water in the collection chamber 215 in advance. S3 Gradient Defrosting Mode: If ΔP is still greater than P1 after S2, the gradient defrosting mode is entered. The controller first closes the partition baffles 211 of the upper and middle defrosting zones, and only opens the lower defrosting zone. At the same time, the exhaust fan of the dual fan section 15 is started to run at 50% of the rated speed to introduce indoor hot air into the lower defrosting zone for defrosting. After running for T1 time, the partition baffle 211 of the middle defrosting zone is opened, and the process continues for T2 time. Finally, the partition baffle 211 of the upper defrosting zone is opened, and the process continues for T3 time. S4 Final Stage: After all zones have finished defrosting, the controller restarts all vibrators 218 at the second frequency f2 for 30 seconds to shake off the water droplets remaining on the core surface; at the same time, the discharge pump 217 is controlled to run at high speed for 2 minutes to completely drain the defrosting water in the collection chamber 215. Among them, T1>T2>T3, f2>f1.

[0031] Furthermore, this solution endows the zoned air baffle 211 with additional multi-functional reuse capabilities, significantly improving the unit's operational reliability and energy efficiency. The controller is also configured to perform zoned fault isolation and adaptive airflow adjustment functions. When a damage to the heat exchange membrane in a defrosting zone is detected, causing cross-contamination between fresh air and exhaust air, the controller controls the corresponding zone's baffle 211 to remain completely closed at 0 degrees Celsius, isolating the faulty zone, while the remaining zones operate normally. When the indoor carbon dioxide concentration is lower than the set threshold, the controller linearly adjusts the opening angle of all zone baffles 211 between 30 and 90 degrees based on the real-time carbon dioxide concentration value, thereby achieving continuous stepless adjustment of the exhaust air volume.

[0032] The following supplementary descriptions are provided for the remaining supporting connection structures of this unit to fully present the overall composition of the unit. The fresh air and exhaust air integrated section 11 is provided with a fresh air inlet 17 and an exhaust air outlet 18, and the air supply and return air integrated section 16 is provided with a return air inlet 19 and an air supply outlet 110; The fan chamber of the total heat exchange box 21 is divided into two independent chambers by a partition, and a centrifugal fan 22 is installed in each chamber. The top of the total heat exchange box 21 is provided with an exhaust inlet 26 and a fresh air outlet 27, and the bottom is provided with a fresh air duct 28 and an exhaust duct 29.

[0033] In summary, the present invention also has the following comprehensive working principle and beneficial effects: This invention addresses the temperature gradient distribution characteristics of the inclined plate cross-flow total heat exchange core 24 by constructing a comprehensive anti-frost system encompassing "proactive prevention, precise removal, and thorough aftercare." The vibration defrosting structure proactively removes initial frost at the exhaust inlet 26, blocking frost bridges and sealing off pathways in advance. As frost deepens, a zoned defrosting structure divides the core into independent defrosting zones along its inclined height, performing gradient defrosting from bottom to top according to frost severity, concentrating hot air on the corresponding areas and avoiding ineffective heating. Water generated during defrosting is directed to the inverted triangular collection chamber 215 via a guide channel 213 conforming to the inclined surface of the core, and then forcibly discharged by the discharge pump 217, preventing residual defrosting water from freezing. Simultaneously, a three-level progressive linkage control logic automatically matches the defrosting intensity based on the pressure difference between the core inlet and outlet, achieving sequential coordinated operation of the vibration defrosting, zoned defrosting, and drainage systems. Furthermore, the zoned baffle 211 can be reused as a fault isolation unit and airflow regulation unit, expanding the unit's functionality without adding extra components.

[0034] It specifically addresses the unique problem of uneven frosting in the inclined core, significantly extending the unit's continuous operating time under low temperature and high humidity conditions in northern winters, avoiding frequent shutdowns for defrosting, and ensuring continuous and stable ventilation indoors.

[0035] The combination of gradient defrosting and three-level progressive control enables on-demand defrosting, avoiding the energy waste of traditional overall defrosting and significantly reducing defrosting energy consumption; at the same time, it eliminates the problem of heat exchange film fatigue caused by excessive defrosting and effectively extends the service life of the total heat exchange core 24.

[0036] The multi-functional reuse design of the partitioned wind baffle 211 eliminates the need for additional airflow regulating valves and fault bypass structures, saving internal space and reducing manufacturing costs. The fault isolation function allows the unit to continue operating even when the heat exchange membrane in a single partition is damaged, significantly improving operational reliability.

[0037] The low-power, high-frequency vibration defrosting structure can remove the initial frost layer without affecting the normal operation of the unit, reducing the number of forced defrosting starts. At the same time, it can shake off the dust accumulated on the surface of the core, achieving self-cleaning of the core and extending the maintenance cycle.

[0038] All improved structures are based on the existing 24-frame total heat exchange core, without changing the overall layout and core components of the unit. This facilitates rapid transformation and mass production of existing production lines, and has good economic efficiency and feasibility.

[0039] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. An energy-saving outdoor air conditioning cabinet for fresh air conditioning, characterized in that, include: The fresh air and exhaust air integrated section (11) and the air supply and return air integrated section (16). The two sections are arranged in sequence as an energy recovery section (12), a medium-efficiency filtration section (13), a temperature and humidity treatment section (14), and a dual-fan section (15). The energy recovery section (12) includes a total heat exchange box (21), the interior of which is divided into a heat exchange chamber (23) and a fan chamber. A detachable total heat exchange core (24) is slidably installed inside the heat exchange chamber (23) via a drawer-type guide rail (25). The total heat exchange core (24) is provided with a zoned defrosting structure and a defrosting flow guiding structure; The partitioned defrosting structure is used to divide the surface of the total heat exchange core (24) into multiple independent defrosting partitions along the oblique height, and the on / off of each defrosting partition can be controlled independently to achieve gradient defrosting; The defrosting guide structure is used to direct and concentrate the defrosting water generated on the surface of the total heat exchange core (24) to prevent defrosting water residue from freezing.

2. The energy-saving outdoor air conditioning cabinet for fresh air conditioning according to claim 1, characterized in that, The partitioned defrosting structure includes a mounting frame (210) and at least two partitioned baffles (211). The mounting frame (210) is mounted on the side of the total heat exchange core (24). Multiple partitioned baffles (211) are mounted on the mounting frame (210) parallel to and rotatably along the oblique height direction of the total heat exchange core (24), dividing the ventilation channel of the total heat exchange core (24) into at least two independent defrosting partitions along the oblique height.

3. The energy-saving outdoor air conditioning cabinet for fresh air conditioning according to claim 2, characterized in that, The mounting frame (210) is provided with multiple drive motors (212) on its side, which are used to drive multiple partition wind deflectors (211) to rotate synchronously or independently to open or close the corresponding defrosting partition.

4. The energy-saving outdoor air conditioning cabinet for fresh air conditioning according to claim 3, characterized in that, The number of partitioned baffles (211) is three, which divide the exhaust channel of the total heat exchange core (24) into three independent defrosting partitions along the oblique height direction: upper, middle and lower. The rotation angle range of the partitioned baffles (211) is 0 degrees to 90 degrees. When the angle is 90 degrees, the exhaust channel of the corresponding partition is fully opened, and when the angle is 0 degrees, the exhaust channel of the corresponding partition is completely sealed.

5. An energy-saving outdoor air conditioning cabinet for fresh air conditioning according to claim 1, characterized in that, The defrosting guide structure includes a collection chamber (215), which is obliquely arranged on the surface of the total heat exchange core (24) and extends to the bottom edge of the total heat exchange core (24). The collection chamber (215) is located at the bottom of the total heat exchange core (24) and is used to collect the defrosting water under the guide and the defrosting water that flows directly down the surface of the total heat exchange core (24). The inner wall and the inner wall of the collection chamber (215) are both coated with a hydrophobic coating; the collection chamber (215) is configured as an inverted triangular structure, and the bottom of the collection chamber (215) is connected to the drain pipe (216) through the connecting pipe (214). The drain pipe (216) is equipped with a discharge pump (217), and the water outlet of the drain pipe (216) extends to the outside of the total heat exchange box (21).

6. The energy-saving outdoor air conditioning cabinet for fresh air conditioning according to claim 1, characterized in that, The exhaust inlet frame of the total heat exchange core (24) is also provided with a vibration defrosting structure, which is used to remove the defrosting water and initial frost layer formed on the surface of the total heat exchange core (24) and prevent frost and ice from blocking the ventilation channel of the total heat exchange core (24). The total heat exchange core (24) is a plate-type cross-flow total heat exchange core, which is installed inside the heat exchange cavity (23) in an oblique manner; The fresh air duct of the total heat exchange core (24) extends from the lower left to the upper right, and the exhaust air duct extends from the upper left to the lower right, with the two ducts isolated from each other.

7. An energy-saving outdoor air conditioning cabinet for fresh air conditioning according to claim 6, characterized in that, The vibration defrosting structure includes multiple vibrators (218) and multiple elastic paddles; the multiple vibrators (218) are rigidly fixed and evenly distributed on the frame of the ventilation channel of the total heat exchange core (24).

8. An energy-saving outdoor air conditioning cabinet for fresh air conditioning according to claim 7, characterized in that, It also includes a controller electrically connected to all drive motors (212), all vibrators (218), and the discharge pump (217), the controller being configured to execute a three-level progressive linkage defrosting control method, the steps of which are as follows: S1 Pre-detection stage: Real-time detection of the pressure difference ΔP between the inlet and outlet of the total heat exchange core (24). When ΔP reaches the first threshold P1, the initial defrosting mode is entered. S2 Initial defrosting mode: The controller starts all vibrators (218) to vibrate intermittently at the first frequency f1, each vibration lasts for 10 seconds, with an interval of 30 seconds, and continues to run for 5 minutes; at the same time, the discharge pump (217) is controlled to run at a low speed to drain the water in the collection chamber (215) in advance; S3 Gradient Defrosting Mode: If ΔP is still greater than P1 after S2 ends, enter gradient defrosting mode; the controller first closes the partition baffles (211) of the upper and middle defrosting zones, only opens the lower defrosting zone, and at the same time starts the exhaust fan of the dual fan section (15) to run at 50% of the rated speed, so as to introduce indoor hot air into the lower defrosting zone for defrosting; after running for T1 time, open the partition baffle (211) of the middle defrosting zone and continue to run for T2 time; finally, open the partition baffle (211) of the upper defrosting zone and run for T3 time; S4 Final Stage: After all zones have finished defrosting, the controller restarts all vibrators (218) at the second frequency f2 for 30 seconds to shake off the water droplets remaining on the core surface; at the same time, the discharge pump (217) is controlled to run at high speed for 2 minutes to completely drain the defrosting water in the collection chamber (215); Among them, T1>T2>T3, f2>f1.

9. An energy-saving outdoor air conditioning cabinet for fresh air conditioning according to claim 8, characterized in that, The controller is also configured to perform zone fault isolation and adaptive airflow adjustment functions: When a damage to the heat exchange membrane of a defrosting zone is detected, resulting in cross-contamination between fresh air and exhaust air, the controller controls the corresponding zone's baffle (211) to remain completely closed at 0 degrees, isolating the faulty zone, while the remaining zones operate normally. When the indoor carbon dioxide concentration is lower than the set threshold, the controller linearly adjusts the opening angle of all zone baffles (211) between 30 and 90 degrees according to the real-time carbon dioxide concentration value, so as to realize the continuous stepless adjustment of the exhaust air volume.

10. An energy-saving outdoor air conditioning cabinet for fresh air conditioning according to any one of claims 1-9, characterized in that, The fresh air and exhaust air integrated section (11) is provided with a fresh air inlet (17) and an exhaust air outlet (18), and the air supply and return air integrated section (16) is provided with a return air inlet (19) and an air supply outlet (110). The fan chamber of the total heat exchange box (21) is divided into two independent chambers by a partition, and a centrifugal fan (22) is installed in each chamber. The top of the total heat exchange box (21) is provided with an exhaust inlet (26) and a fresh air outlet (27), and the bottom is provided with a fresh air duct (28) and an exhaust duct (29).

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