Integrated fresh air air conditioning unit

Abstract

The utility model discloses integrated fresh air air conditioning unit, including unit casing, the first indoor side air inlet and second indoor side air inlet are equipped with to the first side of unit casing, the second side is equipped with outdoor side air inlet and outdoor side air outlet, the top side is equipped with indoor side air outlet, inside is equipped with the first fan and first heat exchanger of being located first air duct, the second fan and second heat exchanger of being located second air duct, third fan and second heat exchanger of being located third air duct, fourth fan and first heat exchanger of being located fourth air duct. The utility model discloses the fresh air system and refrigerating system design integration, can according to indoor side (such as computer lab, warehouse interior etc. ) Heat load and outdoor side's outside environment temperature enable different air duct and switch different air circulation path to intelligently select different working mode (such as internal circulation mode, external circulation mode, internal and external fresh air circulation mode), under the premise of satisfying air exchange and temperature control function realizes optimal energy -conserving effect.

Description

Technical Field

[0001] This utility model relates to the technical field of fresh air conditioning units, and in particular to an integrated fresh air conditioning unit. Background Technology

[0002] Traditional air conditioning systems are typically split-type designs: the condenser, compressor, expansion valve, and other components are located in the outdoor unit, while the evaporator is located in the indoor unit; alternatively, the condenser, compressor, expansion valve, and evaporator are all located in the outdoor unit, with fan coil units connected to the evaporator via ducts, in which case the fan coil units act as the indoor unit. However, regardless of the design, traditional air conditioning systems suffer from drawbacks such as large footprint and significant susceptibility to outdoor environmental factors. They primarily focus on regulating indoor temperature, with relatively limited effectiveness in improving indoor air quality, especially in environments like computer rooms or warehouses where these limitations are more pronounced.

[0003] As a result, fresh air systems have emerged. However, existing fresh air systems and air conditioning systems are usually separated into different units, making installation and maintenance complex, energy consumption high, and costs high. Currently, there are also air conditioning systems on the market that integrate fresh air functions, but to avoid mutual interference between the integrated components, they are basically just air conditioning systems with a fresh air duct added. The fresh air duct is independent of the other structures of the air conditioning system, and often requires separate air intake and exhaust ducts for the fresh air duct. Therefore, it is necessary to modify the air ducts connecting the refrigeration and air conditioning systems, which involves significant modifications and complex operations. Utility Model Content

[0004] In order to overcome the limitations of traditional split-type air conditioners, such as large space occupation and great influence of outdoor environment, and the technical problems of traditional integrated air conditioners, such as complex structural design, this utility model provides an integrated fresh air conditioning unit.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] An integrated fresh air conditioning unit includes a unit casing. A first indoor air inlet and a second indoor air inlet are provided on a first side of the unit casing. An outdoor air inlet and an outdoor air outlet are provided on the opposite second side. An indoor air outlet is provided on the top side. The interior of the unit casing includes:

[0007] A first fan and a first heat exchanger are provided, and a first air duct is provided between the first indoor air inlet and the first indoor air outlet, with the first fan and the first heat exchanger located in the first air duct.

[0008] A second fan and a second heat exchanger are provided, and a second air duct is provided between the outdoor air inlet and the outdoor air outlet. The second fan and the second heat exchanger are located in the second air duct.

[0009] The third fan and the fourth fan, the second indoor air inlet and the outdoor air outlet are provided with a third air duct, the third fan and the second heat exchanger are located in the third air duct, and the fourth fan and the first heat exchanger are located in the fourth air duct;

[0010] The first indoor air inlet, the second indoor air inlet, and the indoor air outlet face indoors or are connected to the indoor environment; the outdoor air inlet and the outdoor air outlet face outdoors or are connected to the outdoor environment.

[0011] As a preferred embodiment, the integrated fresh air conditioning unit further includes an air box, the interior of which is divided into a first cavity and a second cavity, the first cavity being connected to the third air duct and the second cavity being connected to the fourth air duct.

[0012] As a preferred embodiment, the bellows is provided with a partition inside, which is arranged parallel to the first side and the second side, and the partition divides the interior of the bellows into the first cavity and the second cavity.

[0013] As a preferred embodiment, the air box includes a first port and a second port arranged opposite to each other, the first port and the second port being connected through the first cavity, and the first port being connected to the second indoor air inlet, and the second port being arranged towards the third fan.

[0014] As a preferred embodiment, the bellows further includes a third port and a fourth port arranged opposite to each other, the third port and the fourth port being connected through the second cavity, the third port being connected to the outdoor air inlet, and the fourth port being arranged towards the fourth fan.

[0015] As a preferred embodiment, the bellows further includes a first filter disposed at the first port and / or the second port.

[0016] As a preferred embodiment, the bellows further includes a second filter, which is provided with the third port and / or the fourth port.

[0017] As a preferred embodiment, the first fan is a centrifugal fan, with its air inlet facing the first indoor air inlet and its air outlet facing the first heat exchanger, which is located between the first fan and the indoor air outlet.

[0018] As a preferred embodiment, the second fan is a centrifugal fan, with its air inlet facing the outdoor air inlet and its air outlet facing the second heat exchanger, which is located between the second fan and the outdoor air outlet.

[0019] As a preferred embodiment, the integrated fresh air conditioning unit further includes a compressor, a throttling element, a four-way valve, and refrigerant pipes. The compressor, the four-way valve, the first heat exchanger, the second heat exchanger, and the throttling element are connected through the refrigerant pipes to form a refrigerant circulation path.

[0020] In summary, the integrated fresh air conditioning unit provided by this utility model has at least the following technical advantages compared with the prior art:

[0021] 1) This utility model integrates an internal and external circulation fresh air system with a compressor refrigeration system. It can activate different air ducts and switch different air circulation paths based on the heat load of the indoor area (such as a computer room or warehouse) and the ambient temperature of the outdoor area, thereby intelligently selecting different operating modes (such as internal circulation mode, external circulation mode, and internal and external fresh air circulation mode) to achieve optimal energy-saving effects while meeting air exchange and temperature control functions. Furthermore, this integrated fresh air conditioning unit can be installed indoors or at the boundary between indoor and outdoor areas (e.g., embedded in a wall), thus being less affected by external environmental factors. It also avoids the risk of theft associated with split-type outdoor units and improves noise pollution issues caused by outdoor unit operation.

[0022] 2) This utility model's fresh air conditioning unit adopts an integrated design. On one hand, it integrates components such as the heat exchange module, fan module, and fresh air module into the unit casing, directly or indirectly connected / interconnected through different refrigerant pipes and air ducts, ensuring that the unit can integrate temperature control (cooling / heating) and fresh air exchange functions. On the other hand, through upper and lower layered arrangement and partition structures, the internal structure of the unit is divided into different air duct areas, and different heat exchangers, fans, and other structures are located in different areas, ensuring that each module works independently in each mode without affecting each other. The structural design is simple and reasonable. Furthermore, through the above structural design, the integrated fresh air conditioning unit has a compact overall structure, high integration, small footprint, and is easy to install and maintain. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the integrated fresh air conditioning unit of this utility model;

[0024] Figure 2 This is another structural schematic diagram of the integrated fresh air conditioning unit of this utility model;

[0025] Figure 3 This is a side sectional view of the integrated fresh air conditioning unit of this utility model;

[0026] Figure 4 This is a front sectional view of the integrated fresh air conditioning unit of this utility model;

[0027] The meanings of the reference numerals in the attached figures are as follows:

[0028] 1. Unit casing; 11. First indoor air inlet; 12. Indoor air outlet; 13. Outdoor air inlet; 14. Outdoor air outlet; 15. Second indoor air inlet;

[0029] 2. First fan;

[0030] 3. First heat exchanger;

[0031] 4. Second fan;

[0032] 5. Second heat exchanger;

[0033] 6. Air box; 61. First filter; 62. Second filter;

[0034] 7. Third fan;

[0035] 8. Fourth fan;

[0036] 9. Compressor. Detailed Implementation

[0037] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0038] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0040] See Figure 1 and Figure 2 As shown, in the technical solution of this utility model, the integrated fresh air air conditioning unit includes a unit housing 1. The first side of the unit housing 1 is provided with a first indoor air inlet 11 and a second indoor air inlet 15. The second side opposite to the first side is provided with an outdoor air inlet 13 and an outdoor air outlet 14. The top side of the unit housing 1 is provided with an indoor air outlet 12.

[0041] The first indoor air inlet 11, the second indoor air inlet 15, and the indoor air outlet 12 are oriented towards the interior, while the outdoor air inlet 13 and the outdoor air outlet 14 are oriented towards the exterior. Alternatively, the integrated fresh air conditioning unit of this invention can be located at the boundary between the indoor and outdoor sides (e.g., embedded in a wall), in which case the first indoor air inlet 11, the second indoor air inlet 15, and the indoor air outlet 12 are oriented towards the indoor environment, and the outdoor air inlet 13 and the outdoor air outlet 14 are oriented towards the outdoor environment.

[0042] Alternatively, the first indoor air inlet 11, the second indoor air inlet 15, and the indoor air outlet 12 can be connected to the indoor environment, and the outdoor air inlet 13 and the outdoor air outlet 14 can be connected to the outdoor environment. As an optional solution, the integrated fresh air conditioning unit of this utility model can be located on the indoor side, and the first indoor air inlet 11, the second indoor air inlet 15, and the indoor air outlet 12 can be connected to the indoor environment through pipes or other structures, and the outdoor air inlet 13 and the outdoor air outlet 14 can be connected to the outdoor environment through pipes or other structures.

[0043] In both of the above design methods, since there is no need to place the fresh air conditioning unit outdoors, it is less affected by external environmental factors, can avoid the risk of theft of traditional split-type outdoor units, and improves the problem of noise pollution when the outdoor unit is working.

[0044] It is worth mentioning that "indoor, indoor side, indoor environment" in this utility model includes the internal area or environment of buildings such as computer rooms, industrial warehouses, and logistics warehouses, while "outdoor, outdoor side, outdoor environment" in this utility model includes the external area or environment of buildings such as computer rooms, industrial warehouses, and logistics warehouses.

[0045] See Figure 3 and Figure 4 As shown, the unit casing 1 is equipped with a first fan 2 and a first heat exchanger 3. A first air duct is provided between the first indoor air inlet 11 and the indoor air outlet 12. The first fan 2 and the first heat exchanger 3 are located in the first air duct. Specifically, indoor air can enter the first air duct through the first indoor air inlet 11 under the force of the first fan 2, and then flow through the first fan 2 and the first heat exchanger 3 in the first air duct. After heat exchange (cooling or heating) by the first heat exchanger 3, it is discharged from the indoor air outlet 12, realizing the indoor air internal circulation, that is, the air internal circulation mode of the integrated fresh air air conditioning unit.

[0046] See Figure 3 and Figure 4As shown, the unit casing 1 is also equipped with a second fan 4 and a second heat exchanger 5. A second air duct is provided between the outdoor air inlet 13 and the outdoor air outlet 14, and the second fan 4 and the second heat exchanger 5 are located in the second air duct. Specifically, outdoor air can enter the first air duct through the outdoor air inlet 13 under the action of the second fan 4, and then flow through the second fan 4 and the second heat exchanger 5 in the second air duct. After heat exchange (cooling or heating) by the second heat exchanger 5, it is discharged from the outdoor air outlet 14, realizing the internal circulation of outdoor air, that is, the external air circulation mode of the integrated fresh air air conditioning unit.

[0047] See Figure 3 and Figure 4 As shown, the unit casing 1 is also equipped with a third fan 7 and a fourth fan 8. The second indoor air inlet 15 and the outdoor air outlet 14 are provided with a third air duct. The third fan 7 and the second heat exchanger 5 are located in the third air duct, and the fourth fan 8 and the first heat exchanger 3 are located in the fourth air duct. Specifically, the indoor air can enter the third air duct through the second indoor air inlet 15 under the action of the third fan 7, and then flow through the third fan 7 and the second heat exchanger 5 in the third air duct. After heat exchange (cooling or heating) by the second heat exchanger 5, it is discharged from the outdoor air outlet 14. At the same time, outdoor air can enter the fourth air duct through the outdoor air inlet 13 under the force of the fourth fan 8, and then flow through the fourth fan 8 and the first heat exchanger 3 in the fourth air duct. After heat exchange (cooling or heating) by the first heat exchanger 3, it is discharged from the indoor air outlet 12, thus realizing the circulation of fresh air between the indoor and outdoor sides, which is the indoor and outdoor air circulation mode of the integrated fresh air air conditioning unit, improving the indoor air purification effect.

[0048] More specifically, during use, the integrated fresh air conditioning unit can simultaneously operate in both internal and external air circulation modes. The first and second air ducts are isolated from each other, and the first heat exchanger 3, first fan 2, second heat exchanger 5, and second fan 4 within each duct operate independently without affecting each other's operation. Furthermore, the integrated fresh air conditioning unit's internal and external air circulation modes are not simultaneously activated with the internal and external air circulation modes. In this case, by adjusting the air valves, baffles, and other structures inside the unit casing 1, a third and fourth air duct are formed inside the unit casing 1. These third and fourth air ducts are isolated from each other, and the second heat exchanger 5, third fan 7, first heat exchanger 3, and fourth fan 8 within each duct operate independently without affecting each other's operation.

[0049] Therefore, based on the above structural design, this utility model integrates the internal and external circulation fresh air system with the compressor 9 refrigeration system. It can activate different air ducts and switch different air circulation paths according to the indoor heat load and the outdoor ambient temperature, thus intelligently selecting different operating modes to achieve optimal energy-saving effects while meeting air exchange and temperature control functions. Furthermore, due to the integrated structural design, on the one hand, components such as the heat exchange module, fan module, and fresh air module can be integrated into the unit casing 1, directly or indirectly connected / interconnected through different refrigerant pipes and air ducts, ensuring that the unit can integrate temperature control and fresh air exchange functions. On the other hand, the internal structure of the unit is divided into different air duct areas through upper and lower layering and partitions, with different heat exchangers, fans, and other structures located in different areas, ensuring that each module operates independently in each mode without affecting others. The structural design is simple and reasonable, the overall structure is compact, the integration is high, the footprint is small, and it is easy to install and maintain.

[0050] See Figure 3 and Figure 4 As shown, the integrated fresh air conditioning unit also includes a compressor 9, a throttling element, a four-way valve, and refrigerant pipes. The compressor 9, the four-way valve, the first heat exchanger 3, the second heat exchanger 5, and the throttling element are connected through refrigerant pipes to form a refrigerant circulation path.

[0051] More specifically, a complete refrigerant circulation path includes at least the following:

[0052] 1) Compressor 9 exhaust port → four-way valve → second heat exchanger 5 → throttling element → first heat exchanger 3 → four-way valve → compressor 9 suction port.

[0053] 2) Compressor 9 exhaust port → four-way valve → first heat exchanger 3 → throttling element → second heat exchanger 5 → four-way valve → compressor 9 suction port.

[0054] Example 1

[0055] In a preferred embodiment of this utility model, a specific structural design scheme is provided for the fan module and heat exchange module in the first air duct and the second air duct inside the unit casing 1.

[0056] See Figure 3 and Figure 4As shown, in an optional embodiment, the first fan 2 is a centrifugal fan. The air inlet of the first fan 2 faces the first indoor air inlet 11, and the air outlet faces the first heat exchanger 3. The first heat exchanger 3 is located between the first fan 2 and the indoor air outlet 12. Specifically, the first fan 2 includes a first volute and a first impeller. The high-speed rotation of the first impeller generates radial airflow, which can evenly diffuse the air to the entire windward surface of the first heat exchanger 3, avoiding uneven heat exchange caused by vortices or dead zones, and improving the effective utilization rate of the first heat exchanger 3. Furthermore, the air inlet of the first fan 2 is directly aligned with the first indoor air inlet 11, reducing airflow turning losses; the air outlet is tightly connected to the first heat exchanger 3, reducing duct resistance and power consumption (by approximately 8-12%).

[0057] See Figure 3 and Figure 4 As shown, in another optional embodiment, the second fan 4 is a centrifugal fan. The air inlet of the second fan 4 faces the outdoor air inlet 13, and the air outlet faces the second heat exchanger 5. The second heat exchanger 5 is located between the second fan 4 and the outdoor air outlet 14. Specifically, the second fan 4 includes a second volute and a second impeller. The high-speed rotation of the second impeller generates radial airflow, which can evenly diffuse the air to the entire windward surface of the second heat exchanger 5, avoiding uneven heat exchange caused by vortices or dead zones, and improving the effective utilization rate of the second heat exchanger 5. Furthermore, the air inlet of the second fan 4 is directly aligned with the outdoor air inlet 13, reducing airflow turning losses; the air outlet is tightly connected to the second heat exchanger 5, reducing duct resistance and power consumption (by approximately 8-12%).

[0058] Example 2

[0059] In another preferred embodiment of this utility model, a specific structural design scheme is provided for the fan module and heat exchange module in the third and fourth air ducts inside the unit casing 1.

[0060] See Figure 3 and Figure 4As shown, in this embodiment, the integrated fresh air conditioning unit further includes a wind box 6, the interior of which is divided into a first cavity and a second cavity. The first cavity is connected to a third air duct; the second cavity is connected to a fourth air duct. Specifically, indoor air can enter the first cavity through the second indoor air inlet 15 under the force of the third fan 7, then enter the third air duct, flow through the third fan 7 and the second heat exchanger 5 within the third air duct, and after heat exchange (cooling or heating) by the second heat exchanger 5, it is discharged from the outdoor air outlet 14. Simultaneously, outdoor air can enter the second cavity through the outdoor air inlet 13 under the force of the fourth fan 8, then enter the fourth air duct, flow through the fourth fan 8 and the first heat exchanger 3 within the fourth air duct, and after heat exchange (cooling or heating) by the first heat exchanger 3, it is discharged from the indoor air outlet 12, ultimately achieving indoor and outdoor fresh air circulation, i.e., the indoor and outdoor air circulation mode of the integrated fresh air conditioning unit, improving the indoor air purification effect.

[0061] Optionally, the wind box 6 can be equipped with a total heat / sensible heat exchanger housing, which improves energy recovery efficiency through the dual-channel design of the first and second chambers inside.

[0062] In a preferred embodiment, the wind box 6 has an internal partition, which is parallel to the first and second sides, dividing the interior of the wind box 6 into a first cavity and a second cavity. On one hand, the parallel partition design ensures that the cross-sectional area of ​​the first and second cavities remains constant along their entire length. Combined with the "fan-shaped" diffusion angle of the centrifugal fan's radial airflow, this significantly reduces the wind speed non-uniformity coefficient on the heat exchanger's windward side, further improving heat exchange efficiency. On the other hand, the internal partition can act as a reinforcing rib, eliminating the need for a traditional external reinforcing frame and reducing the overall unit weight.

[0063] In one alternative embodiment, the air box 6 includes a first port and a second port (not shown in the figure) arranged opposite to each other. The first port and the second port are connected through a first cavity, and the first port is connected to the second indoor air inlet 15. The second port is positioned facing the third fan 7. Specifically, indoor air can enter the interior of the unit housing 1 through the second indoor air inlet 15 under the force of the third fan 7, then enter the first cavity through the first port, and then enter the third air duct through the second port. It flows through the third fan 7 and the second heat exchanger 5 in the third air duct, and after heat exchange (cooling or heating) in the second heat exchanger 5, it is discharged from the outdoor air outlet 14.

[0064] Further, see Figure 3 and Figure 4As shown, the air box 6 also includes a first filter 61, which is located at the first inlet and / or the second inlet. That is, the first filter 61 can be located at the first inlet, the second inlet, or both. The first filter 61 is used to intercept PM2.5 in the fresh air and impurities such as oil fumes and fibers in the exhaust air.

[0065] Optionally, the first filter 61 may adopt an EPDM sealing + sound-absorbing cotton composite strip structure.

[0066] In another optional embodiment, the air box 6 further includes a third port and a fourth port (not shown in the figure) arranged opposite to each other. The third port and the fourth port are connected through the second cavity. The third port is connected to the outdoor air inlet 13, and the fourth port is arranged towards the fourth fan 8. Specifically, outdoor air can enter the interior of the unit casing 1 through the outdoor air inlet 13 under the force of the third fan 7, then enter the second cavity through the third port, and then enter the fourth air duct through the fourth port. It flows through the fourth fan 8 and the first heat exchanger 3 in the fourth air duct. After heat exchange (cooling or heating) by the first heat exchanger 3, it is discharged from the indoor air outlet 12, thus realizing the circulation of fresh air between the indoor and outdoor sides, that is, the indoor and outdoor air circulation mode of the integrated fresh air air conditioning unit.

[0067] Further, see Figure 3 and Figure 4 As shown, the air box 6 also includes a second filter 62, which has a third port and / or a fourth port. That is, the second filter 62 can be located at the third port, the fourth port, or both. The first filter 61 is used to intercept PM2.5 in the fresh air and impurities such as oil fumes and fibers in the exhaust air.

[0068] Optionally, the second filter 62 may adopt an EPDM sealing + sound-absorbing cotton composite strip structure.

[0069] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An integrated fresh air conditioning unit, characterized in that, The unit includes a housing, a first indoor air inlet and a second indoor air inlet on a first side, an outdoor air inlet and an outdoor air outlet on the opposite second side, and an indoor air outlet on the top side. The interior of the housing includes: A first fan and a first heat exchanger are provided, and a first air duct is provided between the first indoor air inlet and the first indoor air outlet, with the first fan and the first heat exchanger located in the first air duct. A second fan and a second heat exchanger are provided, and a second air duct is provided between the outdoor air inlet and the outdoor air outlet. The second fan and the second heat exchanger are located in the second air duct. The third fan and the fourth fan, the second indoor air inlet and the outdoor air outlet are provided with a third air duct, the third fan and the second heat exchanger are located in the third air duct, and the fourth fan and the first heat exchanger are located in the fourth air duct; The first indoor air inlet, the second indoor air inlet, and the indoor air outlet face indoors or are connected to the indoor environment; the outdoor air inlet and the outdoor air outlet face outdoors or are connected to the outdoor environment.

2. The integrated fresh air conditioning unit according to claim 1, characterized in that, The integrated fresh air conditioning unit also includes an air box, the interior of which is divided into a first cavity and a second cavity. The first cavity is connected to the third air duct, and the second cavity is connected to the fourth air duct.

3. The integrated fresh air conditioning unit according to claim 2, characterized in that, The bellows has an internal partition, which is arranged parallel to the first side and the second side, and the partition divides the interior of the bellows into the first cavity and the second cavity.

4. The integrated fresh air conditioning unit according to claim 2, characterized in that, The air box includes a first port and a second port arranged opposite to each other. The first port and the second port are connected through the first cavity, and the first port is connected to the second indoor air inlet. The second port is arranged towards the third fan.

5. The integrated fresh air conditioning unit according to claim 2, characterized in that, The air box also includes a third port and a fourth port arranged opposite to each other. The third port and the fourth port are connected through the second cavity. The third port is connected to the outdoor air inlet, and the fourth port is arranged towards the fourth fan.

6. The integrated fresh air conditioning unit according to claim 4, characterized in that, The bellows also includes a first filter, which is disposed at the first port and / or the second port.

7. The integrated fresh air conditioning unit according to claim 5, characterized in that, The air box also includes a second filter, which is provided with the third port and / or the fourth port.

8. The integrated fresh air conditioning unit according to claim 1, characterized in that, The first fan is a centrifugal fan. The air inlet of the first fan faces the first indoor air inlet, and the air outlet faces the first heat exchanger. The first heat exchanger is located between the first fan and the indoor air outlet.

9. The integrated fresh air conditioning unit according to claim 1, characterized in that, The second fan is a centrifugal fan. The air inlet of the second fan faces the outdoor air inlet, and the air outlet faces the second heat exchanger. The second heat exchanger is located between the second fan and the outdoor air outlet.

10. The integrated fresh air conditioning unit according to any one of claims 1-9, characterized in that, The integrated fresh air conditioning unit also includes a compressor, a throttling element, a four-way valve, and refrigerant pipes. The compressor, the four-way valve, the first heat exchanger, the second heat exchanger, and the throttling element are connected through the refrigerant pipes to form a refrigerant circulation path.

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