Heat exchange core and fresh air handling unit

Abstract

The application provides a heat exchange core and a fresh air unit. The heat exchange core comprises two heat exchange film assemblies, the two heat exchange film assemblies are arranged in a double helix structure, and the two heat exchange film assemblies jointly enclose a fresh air heat exchange channel and a return air heat exchange channel. The heat exchange core and the fresh air unit provided by the application set the two heat exchange film assemblies in a double helix structure, and set the heat exchange film in a wave shape, effectively increasing the heat exchange area of the heat exchange core, under the premise of achieving the same heat exchange efficiency, effectively reducing the size of the heat exchange core, and then reducing the overall size of the fresh air unit and the space occupied by the fresh air unit. At the same time, due to the circular arc appearance of the double helix structure, the observability of the appearance of the surface-mounted fresh air unit is greatly improved, the problems of large space and poor appearance of the surface-mounted fresh air equipment are solved, and the appearance beauty is improved.

Description

Technical Field

[0001] This invention relates to the field of air handling equipment technology, and in particular to a heat exchange core and a fresh air handling unit. Background Technology

[0002] Residents are increasingly aware of the importance of healthy living environments, leading to a surge in demand for fresh air systems. However, ceiling-mounted fresh air systems are limited by renovation conditions and must be installed in the bare concrete. Conventional surface-mounted fresh air systems are difficult to popularize like household air conditioners due to their large size and unattractive appearance. For example, while the double-helix core used in patent CN105135587A improves the heat exchange efficiency of the fresh air unit, its heat exchange membrane is still arranged in a planar manner, resulting in limited improvement in the size of the heat exchange membrane and a still relatively large double-helix core. This contributes to the large size of the fresh air unit and negatively impacts the user experience. Summary of the Invention

[0003] In order to solve the technical problem that the excessive size of the heat exchange core in the prior art affects the user experience, a heat exchange core and a fresh air unit are provided in which the heat exchange membrane is arranged in a wave shape to increase the size of the heat exchange membrane and reduce the size of the fresh air unit.

[0004] A heat exchange core, comprising:

[0005] Two heat exchange membrane assemblies are arranged in a double helix structure, and the two heat exchange membrane assemblies together form a fresh air heat exchange channel and a return air heat exchange channel.

[0006] The heat exchange membrane assembly includes a heat exchange membrane with a corrugated cross-sectional shape, and the fresh air heat exchange channel and the return air heat exchange channel exchange heat through the heat exchange membrane.

[0007] The heat exchange membrane has multiple raised sections formed on it, the raised sections forming the wave-shaped peaks, and the heat exchange membrane between two adjacent raised sections forming the wave-shaped troughs.

[0008] A connector is provided between two adjacent crests of the wave; and / or, a connector is provided between two adjacent troughs of the wave.

[0009] The heat exchange membrane assembly has a first end and a second end opposite to each other. The airflow direction in the fresh air heat exchange channel is from the first end to the second end, and the airflow direction in the return air heat exchange channel is from the second end to the first end.

[0010] The thickness of the heat exchange membrane assembly gradually increases along the direction from the first end to the second end.

[0011] The heat exchange core also includes a central tube, with the first end connected to the central tube. Both heat exchange membrane assemblies are wound around the central tube to form the double helix structure. A fresh air inlet channel and a return air outlet channel are formed inside the central tube. The fresh air heat exchange channel is connected to the fresh air inlet channel, and the return air heat exchange channel is connected to the return air outlet channel.

[0012] The heat exchange core also includes a first partition, which is disposed inside the central tube and divides the central tube into the fresh air intake channel and the return air outlet channel.

[0013] The heat exchange core also includes a second partition. Each of the first ends is connected to the central tube through a second partition. The two second partitions divide the side of the central tube into a first section and a second section. The fresh air inlet channel and the fresh air heat exchange channel are connected at the first section, and the return air outlet channel and the return air heat exchange channel are connected at the second section.

[0014] The heat exchange core also includes a shell, in which the central tube and the two heat exchange membrane assemblies are disposed. The two heat exchange membrane assemblies and the shell together form the fresh air heat exchange channel and the return air heat exchange channel. A fresh air inlet is provided on the first end face of the shell, and a return air outlet is provided on the second end face of the shell. A return air inlet and a fresh air outlet are provided on the side of the shell. The fresh air inlet, the fresh air intake channel, the fresh air heat exchange channel and the fresh air outlet are connected in sequence. The return air inlet, the return air heat exchange channel, the return air outlet channel and the return air outlet are connected in sequence.

[0015] The fresh air inlet is connected to the fresh air intake channel through a first air valve, and the return air outlet is connected to the return air outlet channel through a second air valve.

[0016] A fresh air bypass port is provided on the first end face, and the fresh air outlet is connected to the fresh air inlet through the fresh air bypass port.

[0017] A third air valve is installed at the fresh air bypass outlet.

[0018] A return air bypass port is provided on the second end face, and the return air outlet is connected to the return air inlet through the return air bypass port.

[0019] A fourth air valve is installed at the return air bypass port.

[0020] The heat exchange membrane assembly has an involute cross-sectional shape.

[0021] A fresh air handling unit includes the aforementioned heat exchange core.

[0022] The heat exchange core and fresh air unit provided by this invention feature a double-helix structure for the two heat exchange membrane components and a wavy shape for the heat exchange membrane. This effectively increases the heat exchange area of ​​the heat exchange core, reducing its size while maintaining the same heat exchange efficiency. Consequently, it reduces the overall size and space occupied by the fresh air unit. Furthermore, the rounded appearance of the double-helix structure significantly improves the aesthetics of the exposed fresh air unit, addressing the issue of large space requirements and poor appearance associated with exposed fresh air systems. When replacement or cleaning is needed, simply remove the heat exchange membrane components, flatten them for cleaning, dry them, and then reassemble them, reducing the difficulty of cleaning the heat exchange core. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the heat exchange core provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a heat exchange membrane assembly provided in an embodiment of the present invention;

[0025] Figure 3 This is another structural schematic diagram of the heat exchange core provided in an embodiment of the present invention;

[0026] Figure 4 This is another structural schematic diagram of the heat exchange core provided in an embodiment of the present invention;

[0027] Figure 5 This is another structural schematic diagram of the heat exchange core provided in an embodiment of the present invention.

[0028] In the picture:

[0029] 1. Heat exchange membrane assembly; 10. Fresh air heat exchange channel; 11. Return air heat exchange channel; 2. Heat exchange membrane; 21. Raised section; 3. Connector; 4. Central tube; 12. Fresh air inlet channel; 13. Return air outlet channel; 5. First partition; 6. Second partition; 7. Shell; 14. Fresh air inlet; 15. Return air outlet; 16. Return air inlet; 17. Fresh air outlet; 31. First air valve; 32. Second air valve; 18. Fresh air bypass port; 33. Third air valve; 19. Return air bypass port; 34. Fourth air valve. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0031] like Figures 1 to 5The heat exchange core shown includes two heat exchange membrane assemblies 1 arranged in a double helix structure, forming a fresh air heat exchange channel 10 and a return air heat exchange channel 11. Each heat exchange membrane assembly 1 includes a heat exchange membrane 2 with a wavy cross-sectional shape. The fresh air heat exchange channel 10 and the return air heat exchange channel 11 exchange heat through the heat exchange membrane 2. Arranging the two heat exchange membrane assemblies 1 in a double helix structure and the heat exchange membrane 2 in a wavy shape effectively increases the heat exchange area of ​​the heat exchange core. While achieving the same heat exchange efficiency, this effectively reduces the size of the heat exchange core, thereby reducing the overall size and space occupied by the fresh air handling unit. Furthermore, the rounded appearance of the double helix structure greatly improves the aesthetics of the exposed fresh air handling unit, solving the problem of large space requirements and poor appearance of exposed fresh air handling equipment, thus enhancing its aesthetic appeal. When replacement and cleaning are required, simply remove the heat exchange membrane assembly 1, flatten it for cleaning, dry it, and then roll it back into place, reducing the difficulty of cleaning the heat exchange core.

[0032] In one embodiment, the heat exchange membrane 2 has multiple raised sections 21 formed on it. The raised sections 21 form the wavy crests, and the heat exchange membrane 2 between two adjacent raised sections 21 forms the wavy troughs. With the same width, the raised sections 21 can maximize the area of ​​the heat exchange membrane 2 and make the heat exchange membrane 2 form a wavy shape.

[0033] Optionally, the thickness of the raised section 21 constitutes the maximum thickness of the heat exchange membrane assembly 1. The cross-section of the heat exchange membrane 2 between the two raised sections 21 and the two raised sections 21 is trapezoidal. When the two heat exchange membrane assemblies 1 are stacked and wound to form a double helix structure, the trapezoidal structure can ensure that the two heat exchange membrane assemblies 1 support each other reliably, thereby avoiding deformation of the heat exchange membrane assemblies 1 due to extrusion during the winding process, ensuring the reliability of the structure of the fresh air heat exchange channel 10 and the return air heat exchange channel 11, and ensuring the heat exchange efficiency of the heat exchange core.

[0034] When the two heat exchange membrane components 1 form a double helix structure, the thickness of the double helix structure is equal to the sum of the thicknesses of the corresponding positions of the two heat exchange membrane components 1. At this time, the protrusions 21 of the two heat exchange membranes 2 are set one-to-one, thereby ensuring that the size of the fresh air heat exchange channel 10 and the return air heat exchange channel 11 are uniform, further ensuring the heat exchange efficiency of the heat exchange core.

[0035] To further ensure the structural stability of the heat exchange membrane assembly 1, the structure of the fresh air heat exchange channel 10, and the reliability of the return air heat exchange channel 11, a connector 3 is provided between two adjacent wave crests of the wave-shaped structure.

[0036] Similarly, a connector 3 is provided between two adjacent troughs of the wave shape.

[0037] The protruding section 21 is supported by the connector 3 to prevent it from tilting or collapsing under the pressure, thus ensuring the structural reliability of the heat exchange membrane assembly 1.

[0038] Preferably, the heat exchange membrane assembly 1 further includes a support member, which is arranged along the thickness direction of the heat exchange membrane assembly 1 to support the heat exchange membrane assembly 1 in the thickness direction, thereby further preventing the heat exchange membrane assembly 1 from being squeezed and deformed, and making the air duct structure stable.

[0039] The support components and connectors form a frame structure, which provides multi-directional support for the heat exchange module 1 and further improves the structural reliability of the heat exchange module 1.

[0040] The heat exchange membrane can be attached to the surface of the support or connector, or it can be embedded in the support or connector.

[0041] The heat exchange membrane assembly 1 has a first end and a second end opposite to each other. The airflow direction in the fresh air heat exchange channel 10 is from the first end to the second end, and the airflow direction in the return air heat exchange channel 11 is from the second end to the first end. That is, the fresh air and return air flow cross-flow, thereby increasing the heat exchange efficiency.

[0042] The thickness of the heat exchange membrane assembly 1 gradually increases along the direction from the first end to the second end. Further increasing the size of the heat exchange membrane 2 increases the heat exchange efficiency of the heat exchange core.

[0043] The heat exchange core also includes a central tube 4, with the first end connected to the central tube 4. Both heat exchange membrane assemblies 1 are wound around the central tube 4 to form the double helix structure. A fresh air inlet channel 12 and a return air outlet channel 13 are formed within the central tube 4. The fresh air heat exchange channel 10 communicates with the fresh air inlet channel 12, and the return air heat exchange channel 11 communicates with the return air outlet channel 13. That is, the first ends of the two heat exchange membrane assemblies 1 are connected to the central tube 4, with a gap between the two first ends. The two heat exchange membrane assemblies 1 are then wound in the same direction to form a double helix structure. Simultaneously, the central tube 4 is used to minimize the internal dimensions of the double helix structure, thereby further reducing the volume of the heat exchange core.

[0044] The heat exchange membrane assembly 1 has an involute cross-sectional shape. That is, any one of the spirals in the double helix structure is an involute, thereby maximizing the length of the heat exchange assembly within a certain space and thus increasing its heat exchange efficiency.

[0045] Preferably, the starting point of the involute is located on the axis of the central tube 4.

[0046] Specifically, the heat exchange core also includes a first partition 5, which is disposed inside the central tube 4 and divides the central tube 4 into the fresh air inlet channel 12 and the return air outlet channel 13.

[0047] To ensure a reliable connection between the fresh air intake duct 12 and the fresh air heat exchange duct 10, and between the return air outlet duct 13 and the return air heat exchange duct 11, the heat exchange core further includes a second partition 6. Each of the first ends is connected to the central tube 4 via a second partition 6. The two second partitions 6 divide the side of the central tube 4 into a first segment and a second segment. The fresh air intake duct 12 and the fresh air heat exchange duct 10 are connected at the first segment, and the return air outlet duct 13 and the return air heat exchange duct 11 are connected at the second segment. By using the second partition 6 to separate the outer surface of the central tube 4, a connecting hole can be provided at the first segment to connect the fresh air intake duct 12 and the fresh air heat exchange duct 10, and another connecting hole can be provided at the second segment to connect the return air outlet duct 13 and the return air heat exchange duct 11.

[0048] The heat exchange core also includes a housing 7. The central tube 4 and the two heat exchange membrane assemblies 1 are all disposed within the housing 7. The two heat exchange membrane assemblies 1 and the housing 7 together form the fresh air heat exchange channel 10 and the return air heat exchange channel 11. A fresh air inlet 14 is provided on the first end face of the housing 7, and a return air outlet 15 is provided on the second end face of the housing 7. A return air inlet 16 and a fresh air outlet 17 are provided on the side of the housing 7. The fresh air inlet 14, the fresh air intake channel 12, the fresh air heat exchange channel 10, and the fresh air outlet 17 are sequentially connected. The return air inlet 16, the return air heat exchange channel 11, the return air outlet channel 13, and the return air outlet 15 are sequentially connected. By enclosing the heat exchange membrane assemblies with the housing 7, the fresh air heat exchange channel and the return air heat exchange channel are sealed, ensuring a relative seal between the fresh air and the return air, thereby ensuring the heat exchange efficiency of the heat exchange core.

[0049] Specifically, the fresh air inlet 14 is connected to the fresh air intake channel 12 through the first air valve 31. When fresh air is needed to enter the fresh air intake channel 12, the first air valve 31 is opened, and the fresh air can enter the fresh air heat exchange channel 10 through the fresh air intake channel 12 for heat exchange. When fresh air is not needed to enter the fresh air intake channel 12, the first air valve 31 is closed.

[0050] Similarly, the return air outlet 15 is connected to the return air outlet channel 13 via the second air valve 32. When return air is needed to enter the return air outlet channel 13, the second air valve 32 is opened, and the return air enters the return air heat exchange channel 11 for heat exchange and then flows through the return air outlet channel 13 to the return air outlet 15 for discharge. When return air is not needed to enter the return air outlet channel 13, the second air valve 32 is closed. At this time, there is no negative pressure in the return air outlet channel 13 and the return air heat exchange channel 11, so the return air will not enter the heat exchange core.

[0051] A fresh air bypass port 18 is provided on the first end face, and the fresh air outlet 17 is connected to the fresh air inlet 14 through the fresh air bypass port 18. A third air valve 33 is provided at the fresh air bypass port 18. When the quality of the outside fresh air is good and the temperature is suitable, the third air valve 33 can be opened, so that the outside fresh air can flow directly through the fresh air inlet 14 and the fresh air bypass port 18 to the fresh air outlet 17 without adjusting the temperature and humidity of the fresh air.

[0052] Similarly, a return air bypass port 19 is provided on the second end face, and the return air outlet 15 is connected to the return air inlet 16 through the return air bypass port 19. A fourth air valve 34 is provided at the return air bypass port 19. When it is only necessary to exhaust the indoor air to the outside, the fourth air valve 34 is opened, and the indoor air is directly exhausted to the outside through the return air inlet 16, the return air bypass port 19 and the return air outlet 15 in sequence.

[0053] In one implementation, the heat exchange core has a full heat exchange mode, in which the first air valve 31 and the second air valve 32 are open, and the third air valve 33 and the fourth air valve 34 are closed. Outdoor fresh air is sequentially sent into the room through the fresh air inlet 14, the fresh air intake channel 12, the fresh air heat exchange channel 10 and the fresh air outlet 17, and indoor return air is sequentially sent to the outside through the return air inlet 16, the return air heat exchange channel 11, the return air outlet channel 13 and the return air outlet 15.

[0054] In one implementation, the heat exchange core has a dual bypass mode. In this mode, the first air valve 31 and the second air valve 32 are closed, and the third air valve 33 and the fourth air valve 34 are open. Outdoor fresh air is sent into the room through the fresh air inlet 14, the fresh air bypass port 18 and the fresh air outlet 17, and indoor return air is sent to the outside through the return air inlet 16, the return air bypass port 19 and the return air outlet 15.

[0055] In one implementation, the heat exchange core has a fresh air mode, in which the third air valve 33 is open, and the first air valve 31, the second air valve 32, and the fourth air valve 34 are all closed, and only outdoor fresh air is sent into the room through the fresh air inlet 14, the fresh air bypass port 18, and the fresh air outlet 17.

[0056] In one implementation, the heat exchange core has an exhaust mode. In this mode, the fourth air valve 34 is open, and the first air valve 31, the second air valve 32, and the third air valve 33 are all closed. Only indoor air is sent to the outside through the return air inlet 16, the return air bypass port 19, and the return air outlet 15.

[0057] As one implementation method, the heat exchange core has a uniform fresh air mode. In this mode, the first air valve 31 is open, and the second air valve 32, the third air valve 33, and the fourth air valve 34 are all closed. Outdoor fresh air passes through the fresh air inlet 14, the fresh air intake channel 12, and the fresh air heat exchange channel 10 in sequence, and is then sent to the room through the fresh air outlet 17. Since the fresh air needs to pass through the fresh air heat exchange channel 10, it will be uniformly circulated by the fresh air heat exchange channel 10, thereby achieving the effect of uniform fresh air circulation.

[0058] A fresh air handling unit includes the aforementioned heat exchange core.

[0059] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A heat exchange core, characterized in that: include: Two heat exchange membrane components (1) are arranged in a double helix structure, and the two heat exchange membrane components (1) together form a fresh air heat exchange channel (10) and a return air heat exchange channel (11). The heat exchange membrane assembly (1) includes a heat exchange membrane (2), the heat exchange membrane (2) has a corrugated cross-sectional shape, and the fresh air heat exchange channel (10) and the return air heat exchange channel (11) exchange heat through the heat exchange membrane (2); The heat exchange membrane assembly (1) has a first end and a second end opposite to each other. The airflow direction in the fresh air heat exchange channel (10) is from the first end to the second end, and the airflow direction in the return air heat exchange channel (11) is from the second end to the first end. The heat exchange core also includes a central tube (4), the first end of which is connected to the central tube (4). Both heat exchange membrane assemblies (1) are wound around the central tube (4) to form the double helix structure. A fresh air inlet channel (12) and a return air outlet channel (13) are formed inside the central tube (4). The fresh air heat exchange channel (10) is connected to the fresh air inlet channel (12), and the return air heat exchange channel (11) is connected to the return air outlet channel (13). The heat exchange core also includes a shell (7), the central tube (4) and the two heat exchange membrane assemblies (1) are all disposed in the shell (7), and the two heat exchange membrane assemblies (1) and the shell (7) together form the fresh air heat exchange channel (10) and the return air heat exchange channel (11). The first end face of the shell (7) is provided with a fresh air inlet (14), the second end face of the shell (7) is provided with a return air outlet (15), and the side of the shell (7) is provided with a return air inlet (16) and a fresh air outlet (17). The fresh air inlet (14), the fresh air intake channel (12), the fresh air heat exchange channel (10) and the fresh air outlet (17) are connected in sequence, and the return air inlet (16), the return air heat exchange channel (11), the return air outlet channel (13) and the return air outlet (15) are connected in sequence. The fresh air inlet (14) is connected to the fresh air intake channel (12) through the first air valve (31), and the return air outlet (15) is connected to the return air outlet channel (13) through the second air valve (32). A fresh air bypass port (18) is provided on the first end face, and the fresh air outlet (17) is connected to the fresh air inlet (14) through the fresh air bypass port (18); A return air bypass port (19) is provided on the second end face, and the return air outlet (15) is connected to the return air inlet (16) through the return air bypass port (19).

2. The heat exchange core according to claim 1, characterized in that: The heat exchange membrane (2) has a plurality of raised sections (21) formed thereon, the raised sections (21) forming the wave-shaped peaks, and the heat exchange membrane (2) between two adjacent raised sections (21) forming the wave-shaped troughs.

3. The heat exchange core according to claim 2, characterized in that: A connector (3) is provided between two adjacent crests of the wave; and / or, a connector (3) is provided between two adjacent troughs of the wave.

4. The heat exchange core according to claim 1, characterized in that: The thickness of the heat exchange membrane assembly (1) gradually increases along the direction from the first end to the second end.

5. The heat exchange core according to claim 1, characterized in that: The heat exchange core also includes a first partition (5), which is disposed inside the central tube (4) and divides the central tube (4) into the fresh air inlet channel (12) and the return air outlet channel (13).

6. The heat exchange core according to claim 1, characterized in that: The heat exchange core also includes a second partition (6). Each first end is connected to the central tube (4) through a second partition (6). The two second partitions (6) divide the side of the central tube (4) into a first section and a second section. The fresh air inlet channel (12) and the fresh air heat exchange channel (10) are connected at the first section, and the return air outlet channel (13) and the return air heat exchange channel (11) are connected at the second section.

7. The heat exchange core according to claim 1, characterized in that: A third air valve (33) is provided at the fresh air bypass port (18).

8. The heat exchange core according to claim 1, characterized in that: A fourth air valve (34) is provided at the return air bypass port (19).

9. The heat exchange core according to claim 1, characterized in that: The heat exchange membrane assembly (1) has an involute cross-sectional shape.

10. A fresh air handling unit, characterized in that: It includes the heat exchange core as described in any one of claims 1 to 9.

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