A new window air conditioner fresh air system

Abstract

A new type of window air conditioner fresh air system belongs to the technical field of fresh air system, including box, control unit, air supply fan, exhaust fan, twist switch, exhaust filter screen, check valve, fresh air valve, fresh air filter screen, linkage interface, temperature sensor, air quality sensor, special-shaped heat recovery core; The special-shaped heat recovery core is arranged in the middle lower part of the box; The special-shaped heat recovery core is in the shape of a peach in the front view, the two sides are planes, the included angle of the two sides is 85-100 degrees, and the surface opposite to the two sides is a circular arc surface; The special-shaped heat recovery core includes a plurality of heat exchange support layers A, a plurality of heat exchange membranes and a plurality of heat exchange support layers B and more than three core connecting rods; More than three core connecting rods are arranged on the periphery of the special-shaped heat recovery core; The utility model has the advantages that the window air conditioner and the fresh air system are designed uniformly and are deeply linked with each other, the heat recovery core is designed as a non-uniform flow channel, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a fresh air system for window air conditioners, and specifically to a novel fresh air system for window air conditioners, belonging to the technical field of fresh air systems. Background Technology

[0002] As living standards improve, people have increasingly higher requirements for indoor air quality. Currently, residential indoor air conditioning often uses split-type air conditioners combined with fresh air systems. With the growing severity of global energy issues, energy conservation, emission reduction, and improved energy efficiency have become a common focus for all countries.

[0003] Heat recovery fresh air systems, as a novel ventilation technology, can effectively recover energy from exhaust air and apply it to fresh air, thereby reducing building energy consumption and improving indoor environmental quality. However, current traditional heat recovery cores have a square structure and a uniform flow channel design, which can easily lead to a uniform fluid velocity distribution, thickened thermal boundary layer, and reduced heat exchange efficiency. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing heat recovery fresh air systems, such as the independent design and lack of linkage between the window air conditioner and the fresh air system, and the uniform flow channel design of the heat recovery core which reduces heat exchange efficiency. This utility model provides a new type of window air conditioner fresh air system that can achieve a unified design and deep linkage between the window air conditioner and the fresh air system, and a non-uniform flow channel design of the heat recovery core to improve heat exchange efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a novel window air conditioner fresh air system, including a housing, a control unit, a supply fan, an exhaust fan, a rotary switch, an exhaust filter, a check valve, a fresh air valve, a fresh air filter, a linkage interface, a temperature sensor, and an air quality sensor;

[0006] It also includes an irregularly shaped heat recovery core, which is located in the lower middle part of the housing; the irregularly shaped heat recovery core is peach-shaped in the main viewing direction, with two flat sides, an included angle of 85-100° between the two sides, and the surfaces opposite the two sides are arc surfaces;

[0007] The irregularly shaped heat recovery core includes several heat exchange support layers A, several heat exchange membranes, several heat exchange support layers B, and three or more core connecting rods. The heat exchange support layers A, heat exchange membranes, and heat exchange support layers B are all peach-shaped structures, identical in size and shape, and are arranged vertically in a corresponding order. The installation sequence is heat exchange support layer A, heat exchange membrane, heat exchange support layer B, heat exchange membrane, and so on. Three or more core connecting rods are inserted around the irregularly shaped heat recovery core. The irregularly shaped heat recovery core allows heat from the exhaust air to be transferred to the fresh air, thereby heating the fresh air. The supply fan, irregularly shaped heat recovery core, fresh air filter, and fresh air valve form the fresh air channel, while the exhaust fan, irregularly shaped heat recovery core, exhaust filter, and check valve form the exhaust channel.

[0008] The thickness of the heat exchange support layer A and the heat exchange support layer B is 1.1-2.2 mm. The different thicknesses of the heat exchange support layer A and the heat exchange support layer B create a thickness gradient in the stacked layers, which can fully facilitate heat exchange.

[0009] The heat exchange support layer A, heat exchange membrane, and heat exchange support layer B are all peach-shaped structures, identical in size and shape, and are arranged correspondingly on the top and bottom, respectively. The internal flow channels of heat exchange support layer A and heat exchange support layer B are arc-shaped, and the cross-sectional shape of the internal flow channels of heat exchange support layer A and heat exchange support layer B is a non-uniform flow channel. Heat exchange support layer A includes several internal flow channels arranged side by side from the lower right side to the upper left side of heat exchange support layer A, with the curvature of the arc gradually decreasing from the lower right side to the upper left side, and the width of the internal flow channels gradually decreasing from the lower right side to the lower left side. Heat exchange support layer B includes several internal flow channels arranged side by side from the lower left side to the upper right side of heat exchange support layer B, with the curvature of the arc gradually decreasing from the lower left side to the upper right side, and the width of the internal flow channels gradually decreasing from the lower left side to the upper right side. By changing the cross-sectional shape of the internal flow channels, heat exchange support layers A and B guide the velocity differences of the fluid in different regions, thereby enhancing the turbulence effect.

[0010] A non-uniform flow channel heat exchange support layer A, a number of heat exchange films and a number of non-uniform flow channel heat exchange support layers B constitute a non-uniform flow channel composite layered heat recovery core structure.

[0011] The heat exchange membrane is a polymer nano-coated heat exchange membrane or a graphene nano-coated heat exchange membrane; at the same time, by combining the polymer nano-coated heat exchange membrane or the graphene nano-coated heat exchange membrane with multi-layer stacked heat transfer channels, low contact thermal resistance heat transfer is achieved, thereby improving heat recovery efficiency.

[0012] It adopts a modular embedded structure design for the heat recovery fresh air system, utilizing the gap between the indoor and outdoor units and the air outlet panel of the window air conditioner to achieve shared space installation between the fresh air system and the air conditioner; the control unit, supply fan, exhaust fan, rotary switch, exhaust filter, check valve, irregularly shaped heat recovery core, fresh air filter, fresh air valve, and linkage interface are integrated into the cabinet and installed in the gap between the indoor and outdoor units and the air outlet panel of the window air conditioner, sharing the air duct with the air conditioner, without the need for additional openings and installation;

[0013] The control unit is located in the upper middle part of the housing, above the irregularly shaped heat recovery core; the blower is located in the upper right of the housing; the exhaust fan is located in the upper left of the housing; the rotary switch is located in the upper right of the housing; the exhaust filter is located in the lower right of the housing; the check valve is located inside the exhaust filter; the fresh air valve is located in the lower left of the housing; the fresh air filter is located inside the fresh air valve; and the linkage interface is located in the left side of the housing, below the rotary switch.

[0014] The temperature sensor and air quality sensor are installed on both sides of the blower. The temperature sensor and air quality sensor are electrically connected to the control unit respectively. The system is intelligently controlled according to the changes in indoor and outdoor temperature and air quality data.

[0015] The heat recovery fresh air system shares an air duct with the air conditioner. Simultaneously, the intelligent control unit of the fresh air system shares a power supply with the air conditioner, achieving deep integration with the air conditioning system. It can also be independently controlled by the control unit to achieve fresh air oxygenation and energy recovery in the room. The control unit shares a power supply with the air conditioner, and its communication protocol uses TTL serial communication to interface with the air conditioner control, achieving deep integration control. Furthermore, through the communication protocol, a communication line is led out from the linkage interface to interface with the air conditioner control, achieving deep integration control.

[0016] The supply and exhaust fans are vortex fans, driven by 24V DC, to deliver and regulate indoor and outdoor air. The rotary switch is a positional switch with five positions: on, off, high, medium, and low, allowing independent control of the fresh air system. The enclosure dimensions are 300*350*80 mm, made of ABS material, and meet the 5VA fire resistance standard. The heat exchange support layer A, heat exchange support layer B, and core connecting rod are made of ABS material and meet the 5VA fire resistance standard. The exhaust filter has a MERV 8 filtration rating, and the fresh air filter has a MERV 13 filtration rating.

[0017] In the irregularly shaped heat recovery core, heat exchange support layer A serves as the fresh air flow channel, and heat exchange support layer B serves as the exhaust air flow channel. Heat exchange support layers A and B are stacked alternately, and a heat exchange film, as a heat exchange layer, is located between heat exchange support layers A and B to isolate the two airflows and prevent cross-mixing. This guides the velocity differences of the fresh and exhaust airflows in different regions inside the core, enhancing the turbulence effect. Combined with the graphene nano-coated heat exchange film, and utilizing multi-layered stacked heat transfer channels with alternating fresh and exhaust air flow channels, low-contact thermal resistance heat transfer is achieved, thereby improving heat recovery efficiency.

[0018] The heat exchange support layer A has 11 non-uniform flow channels arranged sequentially from the lower right arc surface to the upper left plane, namely non-uniform flow channel A, non-uniform flow channel B, non-uniform flow channel C, non-uniform flow channel D, non-uniform flow channel E, non-uniform flow channel F, non-uniform flow channel G, non-uniform flow channel H, non-uniform flow channel I, non-uniform flow channel J, and non-uniform flow channel K. The curvature of the arc surface gradually decreases from non-uniform flow channel A to non-uniform flow channel K, and the width spacing of the flow channels gradually decreases from non-uniform flow channel A to K.

[0019] The heat exchange support layer B has 11 non-uniform flow channels arranged sequentially from the lower left arc surface to the upper right plane, namely non-uniform flow channel a, non-uniform flow channel b, non-uniform flow channel c, non-uniform flow channel d, non-uniform flow channel e, non-uniform flow channel f, non-uniform flow channel g, non-uniform flow channel h, non-uniform flow channel i, non-uniform flow channel j, and non-uniform flow channel k. The curvature of the arc surface gradually decreases from non-uniform flow channel a to non-uniform flow channel k, and the spacing between the flow channels gradually decreases from non-uniform flow channel a to non-uniform flow channel k. The heat exchange support layer A and the heat exchange support layer B guide the velocity difference of the fluid in different regions by changing the cross-sectional shape of the flow channels inside the core, thereby enhancing the turbulence effect.

[0020] The non-uniform flow channels on heat exchange support layer A correspond to the non-uniform flow channels on heat exchange support layer B in an upper and lower cross shape, with the same structure and flow channel width.

[0021] The thicknesses of the heat exchange support layer A and the heat exchange support layer B are 1.3 mm and 2.0 mm, respectively.

[0022] The thicknesses of the heat exchange support layer A and the heat exchange support layer B are 1.3 mm and 1.8 mm, respectively.

[0023] The thicknesses of heat exchange support layer A and heat exchange support layer B are 1.3 mm and 1.5 mm, respectively. Of course, depending on actual needs, the thicknesses of heat exchange support layer A and heat exchange support layer B can also be designed with other proportions between 1.1 and 2.2 mm.

[0024] The heat exchange membrane is a polymer nano-coated heat exchange membrane. The polymer nano-coated heat exchange membrane uses polymer materials, such as polyimide and polyurethane, as the matrix and is prepared by nanotechnology, such as adding nanoparticles or forming nanostructures, to enhance heat transfer efficiency. It is lightweight, flexible, and has a low cost.

[0025] The heat exchange membrane is a graphene nano-coated heat exchange membrane; the graphene nano-coated heat exchange membrane is a "high-performance version" of the polymer nano-coating. Both are used for heat transfer, but graphene has better performance and stronger heat transfer efficiency.

[0026] Working process: The check valve and fresh air valve are closed when the unit is stopped to prevent cold outdoor air from flowing back into the room and affecting the indoor air conditioning effect. When the system is running, the fresh air flow passes through the fresh air valve, is filtered by the fresh air filter, and has its energy recovered by the irregularly shaped heat recovery core. After being pressurized by the blower, it is sent into the room to purify the indoor air and increase oxygen levels. The exhaust air flow passes through the exhaust filter, the check valve, and has its energy recovered by the irregularly shaped heat recovery core before being discharged outdoors by the exhaust fan.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] (1) This utility model provides a novel fresh air system for a window-type air conditioner. By changing the shape of the heat recovery core, i.e., making the cross-section of the internal flow channel of the heat recovery core an arc shape of different thicknesses, the flow velocity difference of the fluid in different areas is guided, enhancing the turbulence effect. At the same time, combined with a polymer nano-coated heat exchange film or a graphene nano-coated heat exchange film, and utilizing multi-layer stacked heat transfer channels, a heat recovery core with low contact thermal resistance is achieved, thereby improving the heat recovery efficiency. In addition, this utility model also has the advantages of simple structure, easy implementation, and low cost.

[0029] (2) Simultaneously, this system, through its modular embedded structure design of the heat recovery fresh air system, utilizes the gap between the indoor and outdoor units and the air outlet panel of the window air conditioner to achieve shared space installation between the fresh air system and the air conditioner. The heat recovery fresh air system and the air conditioner share the same air duct. At the same time, the intelligent control unit of the fresh air system shares the same power supply as the air conditioner, achieving deep linkage with the air conditioning system and independent control operation. This enables fresh air oxygenation and energy recovery in the room, reducing building energy consumption and improving indoor air quality, while solving the problem of increased equipment costs and space occupation caused by independent fresh air systems. Attached Figure Description

[0030] Figure 1 Yes: A three-dimensional structural schematic diagram of this utility model;

[0031] Figure 2 Yes: Front view of this utility model;

[0032] Figure 3Yes: Left view of this utility model;

[0033] Figure 4 Yes: Main view of the irregularly shaped heat recovery core;

[0034] Figure 5 Yes: 3D diagram of an irregularly shaped heat recovery core;

[0035] Figure 6 yes: Figure 5 Enlarged view of part A;

[0036] Figure 7 Yes: Main view of heat exchange support layer A;

[0037] Figure 8 Yes: Main view of heat exchange support layer B;

[0038] Figure 9 Yes: Front view of the heat exchange film.

[0039] In the attached diagram: 1. Housing; 2. Control unit; 3. Supply fan; 4. Exhaust fan; 5. Rotary switch; 6. Exhaust filter; 7. Check valve; 8. Fresh air valve; 9. Fresh air filter; 10. Linkage interface; 11. Temperature sensor; 12. Air quality sensor; 13. Irregularly shaped heat recovery core; 14. Heat exchange support layer A; 15. Heat exchange membrane; 16. Heat exchange support layer B; 17. Core connecting rod; 18. Plane; 19. Arc surface; 20. Non-uniform flow channel A; 21. Non-uniform flow channel B; 22. Non-uniform flow channel J; 23. Non-uniform flow channel K; 24. Non-uniform flow channel a; 25. Non-uniform flow channel b; 26. Non-uniform flow channel c. 27. Non-uniform flow channel d 28. Non-uniform flow channel e 29. Non-uniform flow channel f 30. Non-uniform flow channel g 31. Non-uniform flow channel h 32. Non-uniform flow channel i 33. Non-uniform flow channel j 34. Non-uniform flow channel k 35. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The left, right, up, down, front, and back directions are all for the convenience of description and can be modified in practice. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Example 1:

[0042] like Figures 1 to 9 As shown, a new type of window air conditioner fresh air system, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a housing 1, a control unit 2, a blower 3, an exhaust fan 4, a rotary switch 5, an exhaust filter 6, a check valve 7, a fresh air valve 8, a fresh air filter 9, a linkage interface 10, a temperature sensor 11, and an air quality sensor 12.

[0043] like Figure 4 and Figure 5 As shown, it also includes an irregularly shaped heat recovery core 13, which is disposed in the lower middle part of the housing 1; the irregularly shaped heat recovery core 13 is peach-shaped in the main viewing direction, with two sides being planes 1305, the included angle α between the two sides being 90°, and the surface opposite to the two sides being an arc surface 1306.

[0044] like Figure 6 As shown, the irregularly shaped heat recovery core 13 includes several heat exchange support layers A 1301, several heat exchange films 1302, several heat exchange support layers B 1303, and six core connecting rods 1304. The heat exchange support layers A 1301, heat exchange films 1302, and heat exchange support layers B 1303 are all peach-shaped structures, identical in size and shape, and are arranged correspondingly at the top and bottom. The installation sequence is heat exchange support layer A 1301, heat exchange films 1302, heat exchange support layers B 1303... 1303, heat exchange membrane 1302, and so on in a cycle; 6 core connecting rods 1304 are inserted around the irregularly shaped heat recovery core 13; the irregularly shaped heat recovery core 13 can transfer heat from the exhaust air to the fresh air, thereby heating the fresh air; the blower 3, the irregularly shaped heat recovery core 13, the fresh air filter 9, and the fresh air valve 8 form the fresh air channel, and the exhaust fan 4, the irregularly shaped heat recovery core 13, the exhaust filter 6, and the check valve 7 form the exhaust channel;

[0045] like Figure 6 As shown, the thickness of the heat exchange support layer A 1301 and the heat exchange support layer B 1303 is 1.1-2.2 mm. The different thicknesses of the heat exchange support layer A 1301 and the heat exchange support layer B 1303 create a thickness gradient in the stacked layers, which enables sufficient heat exchange.

[0046] like Figure 7 , Figure 8 and Figure 9As shown, the heat exchange support layer A 1301, heat exchange membrane 1302, and heat exchange support layer B 1303 are all peach-shaped structures, identical in size and shape, and are arranged correspondingly on the top and bottom, respectively. The internal flow channels of heat exchange support layer A 1301 and heat exchange support layer B 1303 are arc-shaped, and the cross-sectional shape of the internal flow channels of heat exchange support layer A 1301 and heat exchange support layer B 1303 is a non-uniform flow channel. Heat exchange support layer A 1301 includes several internal flow channels, which are arranged side by side from the lower right side to the upper left side of heat exchange support layer A 1301, with the curvature of the arc gradually decreasing from the lower right side to the upper left side, and the width of the internal flow channels gradually decreasing from the lower right side to the lower left side. Heat exchange support layer B 1303 includes several internal flow channels, which are arranged side by side from the lower right side to the upper left side of heat exchange support layer B 1303. The 1303 is arranged side by side from the lower left to the upper right, and the curvature of its arc gradually decreases from the lower left to the upper right. The width of the internal flow channel also gradually decreases from the lower left to the upper right. The heat exchange support layer A 1301 and the heat exchange support layer B 1303 guide the flow velocity difference of the fluid in different regions by changing the cross-sectional shape of the internal flow channel of the core, thereby enhancing the turbulence effect.

[0047] like Figure 3 As shown, a non-uniform flow channel heat exchange support layer A 1301, a number of heat exchange films 1302 and a number of non-uniform flow channel heat exchange support layers B 1303 constitute a non-uniform flow channel composite layered heat recovery core structure.

[0048] like Figure 1 As shown, a modular embedded structure design of the heat recovery fresh air system is adopted. It utilizes the gap between the indoor and outdoor units and the air outlet panel of the window air conditioner to realize the shared space installation of the fresh air system and the air conditioner. The control unit 2, supply fan 3, exhaust fan 4, rotary switch 5, exhaust air filter 6, check valve 7, irregular heat recovery core 13, fresh air filter 9, fresh air valve 8, and linkage interface 10 are integrated into the housing 1 and installed in the gap between the indoor and outdoor units and the air outlet panel of the window air conditioner. It shares the air duct with the air conditioner and does not require additional openings or installation.

[0049] The control unit 2 is located in the upper middle part of the housing 1, above the irregular heat recovery core 13. The blower 3 is located in the upper right of the housing 1. The exhaust fan 4 is located in the upper left of the housing 1. The rotary switch 5 is located in the upper right of the housing 1. The exhaust filter 6 is located in the lower right of the housing 1. The check valve 7 is located inside the exhaust filter 6. The fresh air valve 8 is located in the lower left of the housing 1. The fresh air filter 9 is located inside the fresh air valve 8. The linkage interface 10 is located in the left side of the housing 1, below the rotary switch 5.

[0050] The temperature sensor 11 and the air quality sensor 12 are installed on both sides of the blower 3. The temperature sensor 11 and the air quality sensor 12 are electrically connected to the control unit 2 respectively, and the system is intelligently controlled according to the changes in indoor and outdoor temperature and air quality data.

[0051] The heat recovery fresh air system shares an air duct with the air conditioner. Simultaneously, the intelligent control unit 2 of the fresh air system shares a power supply with the air conditioner, achieving deep integration with the air conditioning system. It can also be independently controlled via the control unit 2 to achieve fresh air oxygenation and energy recovery in the room. The control unit 2 shares a power supply with the air conditioner, and its communication protocol uses TTL serial communication to interface with the air conditioner control, achieving deep integration control. Furthermore, through the communication protocol, a communication line is led out from the linkage interface 10 to interface with the air conditioner control, achieving deep integration control.

[0052] like Figure 1 As shown, the supply fan 3 and exhaust fan 4 are vortex fans, driven by 24V DC, to deliver and regulate indoor and outdoor air; the rotary switch 5 is a position switch with 5 positions: on, off, high, medium, and low, which can independently control the fresh air system; the housing 1 has dimensions of 300*350*80 mm, is made of ABS material, and has a fire resistance rating of 5VA; the heat exchange support layer A 1301, heat exchange support layer B 1303, and core connecting rod 1304 are made of ABS material and have a fire resistance rating of 5VA; the exhaust filter 6 has a filtration rating of MERV 8; and the fresh air filter 9 has a filtration rating of MERV 13.

[0053] like Figure 1 and Figure 6 As shown, in the irregularly shaped heat recovery core 13, heat exchange support layer A 1301 serves as the fresh air flow channel, and heat exchange support layer B 1303 serves as the exhaust air flow channel. Heat exchange support layers A 1301 and B 1303 are stacked alternately, and heat exchange film 1302, as a heat exchange layer, is located between heat exchange support layers A 1301 and B 1303 to isolate the two airflows and prevent cross-mixing. It guides the velocity difference of the fresh and exhaust airflows in different regions inside the core, enhancing the turbulence effect. At the same time, combined with the graphene nano-coated heat exchange film 1302, the multi-layer stacked heat transfer channels, with fresh and exhaust air flow channels arranged alternately, achieve low contact thermal resistance heat transfer, thereby improving heat recovery efficiency.

[0054] like Figure 5 and Figure 6As shown, the heat exchange support layer A 1301 has 11 non-uniform flow channels arranged sequentially from the lower right arc surface to the upper left plane, namely non-uniform flow channel A14, non-uniform flow channel B15, non-uniform flow channel C16, non-uniform flow channel D17, non-uniform flow channel E18, non-uniform flow channel F19, non-uniform flow channel G 20, non-uniform flow channel H 21, non-uniform flow channel I 22, non-uniform flow channel J 23, and non-uniform flow channel K 24. The curvature of the arc surface gradually decreases from non-uniform flow channel A to non-uniform flow channel K, and the spacing between the widths of the non-uniform flow channels gradually decreases from non-uniform flow channel A to non-uniform flow channel K.

[0055] The heat exchange support layer B 1303 has 11 non-uniform flow channels arranged sequentially from the lower left arc surface to the upper right plane, namely non-uniform flow channel a 25, non-uniform flow channel b 26, non-uniform flow channel c 27, non-uniform flow channel d 28, non-uniform flow channel e 29, non-uniform flow channel f 30, non-uniform flow channel g 31, non-uniform flow channel h 32, non-uniform flow channel i 33, non-uniform flow channel j 34, and non-uniform flow channel k 35. The curvature of the arc surface gradually decreases from non-uniform flow channel a to non-uniform flow channel k, and the spacing between the flow channels gradually decreases from non-uniform flow channel a to non-uniform flow channel k. The heat exchange support layer A 1301 and the heat exchange support layer B 1303 guide the velocity difference of the fluid in different regions by changing the cross-sectional shape of the flow channels inside the core, thereby enhancing the turbulence effect.

[0056] The non-uniform flow channels on heat exchange support layer A 1301 correspond to the non-uniform flow channels on heat exchange support layer B 1303 in an upper and lower cross shape, and have the same structure and flow channel width.

[0057] like Figure 1 and Figure 6 As shown, the thicknesses of the heat exchange support layer A 1301 and the heat exchange support layer B 1303 are 1.3 mm and 2.0 mm, respectively.

[0058] Of course, depending on actual needs, the thickness of heat exchange support layer A 1301 and heat exchange support layer B 1303 can also be designed with other proportions between 1.1-2.2mm.

[0059] like Figure 9 As shown, the heat exchange membrane 1302 is a polymer nano-coated heat exchange membrane 1302. The polymer nano-coated heat exchange membrane 1302 uses polymer materials, such as polyimide and polyurethane, as the matrix and is a coating film prepared by nanotechnology, such as adding nanoparticles or forming nanostructures. It enhances heat transfer efficiency and is lightweight, flexible and low in cost.

[0060] Working process: The check valve 7 and fresh air valve 8 are closed when the unit is stopped to prevent outdoor cold air from flowing back into the room and affecting the indoor air conditioning effect. When the system is running, the fresh air flow passes through the fresh air valve 8, is filtered by the fresh air filter 9, and is then pressurized by the blower 3 and sent into the room to purify the indoor air and increase oxygen. The exhaust air flow passes through the exhaust filter 6, the check valve 7, and is then discharged outdoors by the exhaust fan 4 after energy recovery through the shaped heat recovery core 13.

[0061] Example 2:

[0062] like Figure 1 and Figure 6 As shown, the thicknesses of the heat exchange support layer A 1301 and the heat exchange support layer B 1303 are 1.3 mm and 1.8 mm, respectively.

[0063] Same as Example 1.

[0064] Example 3:

[0065] like Figure 1 and Figure 6 As shown, the thicknesses of the heat exchange support layer A 1301 and the heat exchange support layer B 1303 are 1.3 mm and 1.5 mm, respectively.

[0066] Same as Example 1.

[0067] Example 4:

[0068] The heat exchange membrane 1302 is a graphene nano-coated heat exchange membrane 1302; the graphene nano-coated heat exchange membrane 1302 is a "high-performance version" of the polymer nano-coating, with superior graphene performance and stronger heat transfer efficiency.

[0069] Same as Example 1.

[0070] The embodiments described above are merely preferred embodiments of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution should be included within the protection scope of this utility model.

Claims

1. A novel fresh air system for a window-type air conditioner, comprising a housing, a control unit, a supply fan, an exhaust fan, a rotary switch, an exhaust filter, a check valve, a fresh air valve, a fresh air filter, a linkage interface, a temperature sensor, and an air quality sensor, characterized in that: It also includes an irregularly shaped heat recovery core, which is located in the lower middle part of the housing; the irregularly shaped heat recovery core is peach-shaped in the main viewing direction, with two flat sides, an included angle of 85-100° between the two sides, and the surfaces opposite the two sides are arc surfaces; The irregularly shaped heat recovery core includes several heat exchange support layers A, several heat exchange membranes, several heat exchange support layers B, and three or more core connecting rods. The heat exchange support layers A, heat exchange membranes, and heat exchange support layers B are all peach-shaped structures, identical in size and shape, and are arranged correspondingly at the top and bottom. The installation sequence is heat exchange support layer A, heat exchange membrane, heat exchange support layer B, heat exchange membrane, and so on. The three or more core connecting rods pass through the periphery of the irregularly shaped heat recovery core. The thickness of the heat exchange support layer A and the heat exchange support layer B is 1.1-2.2 mm. The different thicknesses of the heat exchange support layer A and the heat exchange support layer B create a thickness gradient in the stacked layers. The heat exchange support layer A, heat exchange membrane, and heat exchange support layer B are all peach-shaped structures, identical in size and shape, and are arranged correspondingly on the top and bottom, respectively. The internal flow channels of heat exchange support layer A and heat exchange support layer B are arc-shaped, and the cross-sectional shape of the internal flow channels of heat exchange support layer A and heat exchange support layer B is a non-uniform flow channel. Heat exchange support layer A includes several internal flow channels, which are arranged side by side from the lower right side to the upper left side of heat exchange support layer A. The curvature of the arc gradually decreases from the lower right side to the upper left side, and the width of the internal flow channel gradually decreases from the lower right side to the lower left side. Heat exchange support layer B includes several internal flow channels, which are arranged side by side from the lower left side to the upper right side of heat exchange support layer B. The curvature of the arc gradually decreases from the lower left side to the upper right side, and the width of the internal flow channel gradually decreases from the lower left side to the upper right side. A non-uniform flow channel heat exchange support layer A, a number of heat exchange films and a number of non-uniform flow channel heat exchange support layers B constitute a non-uniform flow channel composite layered heat recovery core structure. The heat exchange membrane is a polymer nano-coated heat exchange membrane or a graphene nano-coated heat exchange membrane; at the same time, it combines a polymer nano-coated heat exchange membrane or a graphene nano-coated heat exchange membrane and utilizes a multi-layer stacked heat transfer channel.

2. The novel window-type air conditioner fresh air system according to claim 1, characterized in that: The system adopts a modular embedded structure design for the heat recovery fresh air system, utilizing the gap between the indoor and outdoor units and the air outlet panel of the window air conditioner to achieve shared space installation between the fresh air system and the air conditioner; the control unit, supply fan, exhaust fan, rotary switch, exhaust filter, check valve, irregularly shaped heat recovery core, fresh air filter, fresh air valve, and linkage interface are integrated into the cabinet and installed in the gap between the indoor and outdoor units and the air outlet panel of the window air conditioner; The control unit is located in the upper middle part of the housing, above the irregularly shaped heat recovery core; the blower is located in the upper right of the housing; the exhaust fan is located in the upper left of the housing; the rotary switch is located in the upper right of the housing; the exhaust filter is located in the lower right of the housing; the check valve is located inside the exhaust filter; the fresh air valve is located in the lower left of the housing; the fresh air filter is located inside the fresh air valve; and the linkage interface is located in the left side of the housing, below the rotary switch. The temperature sensor and air quality sensor are installed on both sides of the blower. The temperature sensor and air quality sensor are electrically connected to the control unit respectively. The system is intelligently controlled according to the changes in indoor and outdoor temperature and air quality data. The heat recovery fresh air system shares an air duct with the air conditioner. Simultaneously, the intelligent control unit of the fresh air system shares a power supply with the air conditioner, achieving deep integration with the air conditioning system. It can also be independently controlled by the control unit to achieve fresh air oxygenation and energy recovery in the room. The control unit shares a power supply with the air conditioner, and its communication protocol uses TTL serial communication to interface with the air conditioner control, achieving deep integration control. Furthermore, through the communication protocol, a communication line is led out from the linkage interface to interface with the air conditioner control, achieving deep integration control.

3. The novel window-type air conditioner fresh air system according to claim 1, characterized in that: The supply and exhaust fans are vortex fans; the rotary switch is a position switch with 5 positions: on, off, high, medium, and low; the housing is made of ABS material; the heat exchange support layer A, heat exchange support layer B, and the core connecting rod are made of ABS material; the exhaust filter has a filtration level of MERV 8; and the fresh air filter has a filtration level of MERV 13.

4. The novel window-type air conditioner fresh air system according to claim 1, characterized in that: In the irregularly shaped heat recovery core, heat exchange support layer A is the fresh air flow channel and heat exchange support layer B is the exhaust air flow channel; heat exchange support layer A and heat exchange support layer B are stacked alternately, and the heat exchange film is located between heat exchange support layer A and heat exchange support layer B as a heat exchange layer to isolate the two airflows and prevent the airflows from mixing.

5. A novel window-type air conditioner fresh air system according to any one of claims 1 or 4, characterized in that: The heat exchange support layer A has 11 non-uniform flow channels arranged sequentially from the lower right arc surface to the upper left plane, namely non-uniform flow channel A, non-uniform flow channel B, non-uniform flow channel C, non-uniform flow channel D, non-uniform flow channel E, non-uniform flow channel F, non-uniform flow channel G, non-uniform flow channel H, non-uniform flow channel I, non-uniform flow channel J, and non-uniform flow channel K. The curvature of the arc surface gradually decreases from non-uniform flow channel A to non-uniform flow channel K, and the width spacing of the flow channels gradually decreases from non-uniform flow channel A to non-uniform flow channel K. The heat exchange support layer B has 11 non-uniform flow channels arranged sequentially from the lower left arc surface to the upper right plane, namely non-uniform flow channel a, non-uniform flow channel b, non-uniform flow channel c, non-uniform flow channel d, non-uniform flow channel e, non-uniform flow channel f, non-uniform flow channel g, non-uniform flow channel h, non-uniform flow channel i, non-uniform flow channel j, and non-uniform flow channel k. The curvature of the arc surface gradually decreases from non-uniform flow channel a to non-uniform flow channel k, and the width spacing of the flow channels gradually decreases from non-uniform flow channel a to non-uniform flow channel k. The non-uniform flow channels on heat exchange support layer A correspond vertically to the non-uniform flow channels on heat exchange support layer B.

6. The novel window-type air conditioner fresh air system according to claim 1, characterized in that: The thicknesses of the heat exchange support layer A and the heat exchange support layer B are 1.3 mm and 2.0 mm, respectively.

7. The novel window-type air conditioner fresh air system according to claim 1, characterized in that: The thicknesses of the heat exchange support layer A and the heat exchange support layer B are 1.3 mm and 1.8 mm, respectively.

8. The novel window-type air conditioner fresh air system according to claim 1, characterized in that: The thicknesses of the heat exchange support layer A and the heat exchange support layer B are 1.3 mm and 1.5 mm, respectively.

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