Total heat exchange core for fresh air system and fresh air system

Abstract

The utility model relates to the technical field of total heat exchange of fresh air systems, in particular to a total heat exchange core body for a fresh air system and the fresh air system, and aims to solve the problem that an existing fresh air system cannot guarantee heat exchange efficiency, air supply efficiency and air exhaust efficiency at the same time. The total heat exchange core body for the fresh air system comprises a total heat exchange frame which is stacked layer by layer, the total heat exchange frame comprises long-strip-shaped separation bars, an airflow channel is formed between every two adjacent separation bars, and turbulent flow structures are arranged on the separation bars. The turbulent flow structure can disturb flowing of air flow in the air flow channel so as to reduce the flowing speed of the air flow. Therefore, in the working process of the total heat exchange core body, due to the fact that the separation bars are in a long strip shape, gas flows along the linear gas flow channels more smoothly, meanwhile, due to the arrangement of the turbulent flow structures, the gas can be disturbed in the circulation process, the flow speed is reduced, and heat exchange is sufficient. According to the total heat exchange core body, the air supply efficiency and the air exhaust efficiency are guaranteed, and meanwhile the heat exchange efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of full heat exchange of fresh air systems, and specifically provides a full heat exchange core body for a fresh air system and a fresh air system. Background Art

[0002] The fresh air systems currently available on the market can be divided into one-way fresh air systems and two-way fresh air systems. Taking the two-way fresh air system as an example, the two-way fresh air system usually includes a supply fan, an exhaust fan, a heat exchange core, a filter purification device, and other accessories. It can input outdoor air into the room after filtering, thereby increasing the oxygen content of the indoor air and improving the cleanliness of the indoor air. It can also use the exhaust fan to blow the dirty air indoors to the outside, achieving the purpose of reducing the content of harmful gases and substances in the indoor air. In the two-way fresh air system, the heat exchange core is its core component, which plays the role of recycling fresh air, exhaust air energy, and preventing fresh air and exhaust air from mixing and crossing.

[0003] Existing full heat exchange frame structures typically utilize paper-based corrugated frames or PP hollow board frames. The heat exchange frames are stacked layer by layer, separated by separator membranes typically made of fiber paper or polymer nano-membrane materials. During fresh air system operation, when fresh air and exhaust air counterflow or crossflow within the heat exchange core, there is a temperature and humidity difference between the gases on either side of the separator membrane, resulting in enthalpy exchange. The sealing between the separator membrane and the frame structure directly affects the efficiency of enthalpy exchange and the cleanliness of the fresh air system. Existing core frames are typically hexagonal in shape, with 8 to 9 S-shaped straight flow channels per layer. This creates significant wind resistance when fresh air and exhaust fans flow relative to each other within the upper and lower layers, resulting in low air supply and exhaust efficiency. Therefore, improving the efficiency of air supply and exhaust while ensuring the heat exchange efficiency of the fresh air system has become a pressing technical issue in this field.

[0004] In view of this, the art needs a new full heat exchange core for a fresh air system and a fresh air system to solve the existing problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the existing fresh air system cannot simultaneously ensure the heat exchange efficiency and the air supply and exhaust efficiency.

[0006] In the first aspect, the utility model provides a full heat exchange core for a fresh air system, wherein the full heat exchange core includes a full heat exchange frame stacked layer by layer, wherein the full heat exchange frame includes a long strip of partition bars, and an air flow channel is formed between two adjacent partition bars. A spoiler structure is provided on the partition bar, and the spoiler structure can disturb the flow of the air flow in the air flow channel to reduce its flow rate.

[0007] In the above-mentioned specific embodiment of the full heat exchange core for the fresh air system, the spoiler structure is a spoiler protrusion, which is arc-shaped. The arc-shaped spoiler protrusion is evenly distributed on the side wall of the partition column and protrudes in the direction of the air flow channel.

[0008] In the above-mentioned specific embodiment of the full heat exchange core for the fresh air system, the full heat exchange core also includes an upper cover plate and a handle installed on the upper cover plate, and the upper cover plate is provided with a mounting hole for installing the handle. The handle includes a pulling part and a clamping part, the width of the clamping part is greater than the diameter of the mounting hole, the width of the pulling part is less than or equal to the diameter of the mounting hole, and guide surfaces are provided on both sides of the clamping part. The clamping part can pass through the mounting hole and be clamped on the upper cover plate under the guidance of the guide surface.

[0009] In the above-mentioned specific embodiment of the full heat exchange core for the fresh air system, ribs and grooves are provided at the edge of the full heat exchange frame of the upper layer, and corresponding grooves and ribs are provided at the edge of the full heat exchange frame of the lower layer. The ribs on the full heat exchange frames of the upper and lower layers are arranged alternately so that the ribs of the full heat exchange frames of the upper and lower layers can be respectively embedded in each other's grooves, so as to realize the sealing and fixation of the full heat exchange frame of the upper layer and the full heat exchange frame of the lower layer.

[0010] In the above-mentioned specific embodiment of the full heat exchange core for the fresh air system, the full heat exchange core also includes an upper cover plate and a lower cover plate, and grooves and ribs are provided at the edges of the upper cover plate and / or the lower cover plate. The grooves and the ribs form a mortise and tenon fixing structure with the ribs and grooves on the full heat exchange frame to achieve sealing and fixing of the upper cover plate and / or the lower cover plate to the full heat exchange frame.

[0011] In the above-mentioned specific embodiment of the full heat exchange core for the fresh air system, fixing holes are provided at the edge of the full heat exchange frame. There are multiple fixing holes and they are evenly distributed on the full heat exchange frame, so that the heat exchange frames of different layers can be fixed by fasteners passing through the fixing holes.

[0012] In the above-mentioned specific embodiment of the full heat exchange core for the fresh air system, a plurality of the elongated partition bars are provided, and the width of the air flow channel gradually increases along the edge of the full heat exchange frame toward the center.

[0013] In the above-mentioned specific embodiment of the full heat exchange core for the fresh air system, a heat exchange membrane is provided between the full heat exchange frames of adjacent layers, the heat exchange membrane is a graphene polymer membrane, and / or the partition bar is a graphene composite PE material.

[0014] In the above-mentioned specific embodiment of the full heat exchange core for the fresh air system, the spoiler structure is a spoiler fin, and the spoiler fin is arranged on the dividing bar in an inclined direction toward the airflow channel. The inclination direction of the spoiler fin is along the flow direction of the airflow in the airflow channel, and the spoiler fins on both sides of the same airflow channel are staggered.

[0015] The present invention also provides a fresh air system, which includes the full heat exchange core for the fresh air system described in any one of the above technical solutions.

[0016] The technical effect of the utility model is: the full heat exchange core for the fresh air system of the utility model makes the circulation of gas in the air flow channel smoother by setting the air flow channel to a straight shape, thereby making the air supply and exhaust efficiency of the full heat exchange core higher; at the same time, since the spoiler protrusion is set in the air flow channel, the spoiler protrusion can disturb the flow of the air flow in the air flow channel to reduce its flow rate, thereby making the heat exchange between different full heat exchange frames more sufficient, and then ensuring the heat exchange efficiency of the gas in the full heat exchange core, solving the problem that the existing fresh air system cannot ensure the heat exchange efficiency and the air supply and exhaust efficiency at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a schematic diagram of the overall structure of the full heat exchange core of the present utility model;

[0019] Figure 2 This is a partial enlarged view of the installation relationship between the handle and the upper cover of the full heat exchange core of the utility model, in which Figure 2 yes Figure 1 A in the middle;

[0020] Figure 3 This is a front view schematic diagram of a single-layer structure of a full heat exchange frame of the present invention;

[0021] Figure 4 It is a schematic diagram of the reverse side of the single-layer structure of the full heat exchange frame of the present invention after being rotated 90 degrees.

[0022] List of reference numerals:

[0023] 1-Full heat exchange core; 11-Full heat exchange frame; 111-Partitioning bar; 112-Air flow channel; 113-Spoiler protrusion; 12-Upper cover; 121-Mounting hole; 13-Handle; 131-Pulling part; 132-Clamping part; 15-Rib; 16-Groove; 17-Fixing hole. DETAILED DESCRIPTION

[0024] The following describes preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely intended to illustrate the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may adjust these embodiments as needed to suit specific applications.

[0025] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be understood as limiting the utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0026] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] First, the existing full heat exchange core is described. The existing full heat exchange frame structure usually adopts a paper-based corrugated frame or a PP hollow plate frame. The heat exchange frame is stacked layer by layer, and each layer is separated by a partition membrane. The partition membrane is usually made of fiber paper or polymer nano-membrane material. During the operation of the fresh air equipment, when the fresh air and exhaust air counterflow or cross-flow in the heat exchange core, there is a temperature and humidity difference between the gases on both sides of the partition membrane, which will cause enthalpy exchange on both sides of the partition membrane. The sealing between the partition membrane and the frame structure will directly affect the efficiency of enthalpy exchange and the cleanliness of the fresh air system. The shape of the existing core frame is usually hexagonal, with 8 to 9 S-shaped straight flow channels on each layer. When the fresh air and exhaust fans flow relative to each other in the upper and lower layers, the wind resistance is large, resulting in low air supply and exhaust efficiency of the fresh air system. Therefore, how to improve the efficiency of air supply and exhaust while ensuring the heat exchange efficiency of the fresh air system has become a technical problem that needs to be solved urgently in this field. To this end, the following implementation methods are proposed.

[0028] Example 1

[0029] like Figures 1-4As shown, in order to solve the problem that the existing fresh air system cannot simultaneously guarantee the heat exchange efficiency and the air supply and exhaust efficiency, the full heat exchange core 1 for the fresh air system of the present invention includes a full heat exchange frame 11 stacked layer by layer. The single-layer full heat exchange frame 11 is introduced as an example. The single-layer full heat exchange frame 11 includes an outer frame and a partition bar 111 arranged inside the outer frame. The partition bar 111 is long and strip-shaped. An air flow channel 112 is formed between two adjacent partition bars 111. The side walls of the partition bar 111 are provided with evenly distributed spoiler protrusions 113. The spoiler protrusions 113 are arc-shaped and protrude toward the direction of the air flow channel 112, so that the spoiler protrusions 113 can interfere with the flow of air in the air flow channel 112 and reduce its flow rate.

[0030] The advantage of the above embodiment is that the full heat exchange core 1 for the fresh air system of the present invention sets the air flow channel 112 to a straight shape, so that the gas circulation in the air flow channel 112 is smoother, thereby making the air supply and exhaust efficiency of the full heat exchange core 1 higher. At the same time, since the spoiler protrusion 113 is set in the air flow channel 112, the spoiler protrusion 113 can disturb the flow of the air flow in the air flow channel 112 to reduce its flow rate, thereby making the heat exchange between different layers of the full heat exchange frame 11 more sufficient, and then ensuring the heat exchange efficiency of the gas in the full heat exchange core 1, thereby solving the problem that the existing fresh air system cannot simultaneously ensure heat exchange efficiency and air supply and exhaust efficiency.

[0031] Furthermore, in a possible embodiment, the full heat exchange core 1 also includes an upper cover plate 12, a lower cover plate (not shown in the figure) and a handle 13 installed on the upper cover plate 12, and a mounting hole 121 for installing the handle 13 is provided on the upper cover plate 12. The handle 13 includes a lifting portion 131 and a clamping portion 132. The width of the clamping portion 132 is greater than the diameter of the mounting hole 121, and the width of the lifting portion 131 is less than or equal to the diameter of the mounting hole 121. Guide surfaces are provided on both sides of the clamping portion 132, and the clamping portion 132 can pass through the mounting hole 121 and be clamped on the upper cover plate 12 under the guidance of the guide surface. The full heat exchange core 1 is composed of multiple full heat exchange frames 11 stacked layer by layer, and a heat exchange membrane (not shown in the figure) is arranged between the full heat exchange frames 11 of adjacent layers. The heat exchange membrane is a graphene polymer film, and the top and bottom surfaces of the outer frame of each layer of the full heat exchange frame 11 are provided with ribs 15 and grooves 16. The ribs 15 and grooves 16 on the top and bottom surfaces of the outer frames of the full heat exchange frames 11 of adjacent layers are staggered so that the ribs 15 on the bottom surface of the full heat exchange frame 11 of the upper layer can be embedded in the grooves 16 on the top surface of the full heat exchange frame 11 of the lower layer, and the ribs 15 on the top surface of the full heat exchange frame 11 of the lower layer can be embedded in the grooves 16 on the bottom surface of the full heat exchange frame 11 of the upper layer. Grooves 16 and ribs 15 are also provided at the edges of the bottom surface of the upper cover plate 12 and the top surface of the lower cover plate. The grooves 16 and ribs 15 on the bottom surface of the upper cover plate 12 correspond to the ribs 15 and grooves 16 on the top surface of the topmost full heat exchange frame 11, and the grooves 16 and ribs 15 on the top surface of the lower cover plate correspond to the ribs 15 and grooves 16 on the bottom surface of the bottommost full heat exchange frame 11, so that the grooves 16 and ribs 15 on the upper and lower cover plates form a mortise and tenon fixing structure with the grooves 16 and ribs 15 on the full heat exchange frame 11. The frame of the full heat exchange frame 11 is also provided with fixing holes 17. There are multiple fixing holes 17 and they are evenly distributed on the frame of the full heat exchange frame 11, so that the heat exchange frames of different layers can be fixed by fasteners such as bolts and nuts passing through the fixing holes 17.

[0032] When adopting the above-mentioned embodiment, during the installation process of the full heat exchange core 1 of the utility model, each layer of the full heat exchange frame 11 is first installed. After the first layer of the full heat exchange frame 11 is installed, a layer of heat exchange membrane is placed on the first layer of the full heat exchange frame 11. Then, when installing the second layer of the full heat exchange frame 11, the second layer of the full heat exchange frame 11 is rotated 90° clockwise or counterclockwise on the basis of the first layer of the full heat exchange frame 11 to make the ribs 15 and the grooves 16 on the first and second layers of the full heat exchange frames 11 correspond to each other and make the ribs 15 embedded in the grooves 16 to complete the mortise and tenon fixed installation. Before installing the third layer of the full heat exchange frame 11, a layer of heat exchange membrane is placed on the second layer of the full heat exchange frame 11 and then the third layer of the full heat exchange frame 11 is rotated 90° for installation. And so on to achieve the installation of the full heat exchange frame 11. After the full heat exchange frame 11 is installed, the multi-layer heat exchange frame is adjusted to a suitable angle and then installed on the lower cover plate, so that the ribs 15 and grooves 16 on the bottom surface of the full heat exchange frame 11 of the bottom layer form a mortise and tenon fixing structure with the grooves 16 and ribs 15 on the lower cover plate. Similarly, after the installation of the lower cover plate is completed, the upper cover plate 12 is rotated to the correct angle so that the grooves 16 and ribs 15 on the top surface of the full heat exchange frame 11 of the top layer correspond to the ribs 15 and grooves 16 on the upper cover plate 12 and form a mortise and tenon structure to realize the installation of the full heat exchange frame 11 and the upper cover plate 12. Before or after installing the full heat exchange frame 11 and the upper cover 12, the handle 13 can be installed on the upper cover 12. One side of the clamping portion 132 of the handle 13 can be tilted through the mounting hole 121 on the upper cover 12, and then the other side of the clamping portion 132 can be passed through the mounting hole 121 to achieve the installation of the handle 13 on the upper cover 12. Alternatively, both sides of the clamping portion 132 can be passed through the mounting hole 121 at the same time. At this time, the clamping portion 132 should be selected to have a certain elasticity. The material is plastic, for example. During the installation process, due to the guide surfaces provided on both sides of the clamping portion 132, the guide surfaces first contact the edge of the mounting hole 121. Continuing to press the clamping portion 132 downward, the two sides of the clamping portion 132 shrink and shorten under the pressure of the mounting hole 121, and guided by the guide surfaces, pass through the mounting hole 121. After passing through the mounting hole 121, the two sides of the clamping portion 132 rebound and clamp onto the inner side wall of the upper cover 12, thereby completing the installation of the handle 13 on the upper cover 12. Finally, fasteners such as bolts and nuts are sequentially passed through the upper cover 12, the full heat exchange frame 11, and the lower cover to achieve the fixed installation of the entire full heat exchange core 1.

[0033] The advantages of the above embodiment are that: by providing fixing holes 17 on the upper cover 12, the full heat exchange frame 11 and the lower cover, the full heat exchange core 1 can be fixed as a whole by using fasteners such as bolts and nuts, and the fixing holes 17 are arranged in a uniform distribution at regular intervals to ensure that the connection between the upper cover 12 and the full heat exchange frame 11, between each layer of the full heat exchange frame 11, and between the full heat exchange frame 11 and the lower cover is tighter, thereby enhancing the sealing of the full heat exchange frame 11 and reducing the number of full heat exchange frames 11 per layer. 1's heat loss is reduced, so that the heat of each layer of the full heat exchange frame 11 participates in the heat exchange as much as possible, thereby improving the heat exchange efficiency of the full heat exchange core 1; by providing an installable and detachable handle 13 on the upper cover 12, the full heat exchange core 1 can be lifted up as a whole to be installed in the fresh air system; by staggeredly arranging ribs 15 and grooves 16 on the upper cover 12, the full heat exchange frame 11 and the lower cover, so that the ribs 15 and the grooves 16 form a mortise and tenon fixing structure after installation, the overall structure of the full heat exchange core 1 is more stable. In addition, technicians in this field can also perform glue application on the spoiler protrusions 113 during the installation of the heat exchange membrane, so as to further improve the sealing between the heat exchange membrane and the partition bar 111. In addition, as Figure 3 、 Figure 4 As shown in the figure, the positions of the ribs 15 and the grooves 16 on the top and bottom surfaces of the single-layer full heat exchange frame 11 can be staggered, that is, the ribs 15 and the grooves 16 on the top surface are arranged at the outer position on the frame, and the ribs 15 and the grooves 16 on the bottom surface are arranged at the inner position on the frame, so that the width of the frame can be fully utilized and the thickness of the frame can be reduced. When installing the next layer of full heat exchange frame 11, it is only necessary to flip it 180° and then rotate it 90°.

[0034] Furthermore, in a possible embodiment, a plurality of long strip-shaped partition bars 111 are provided, and the intervals between the partition bars 111 gradually increase along the edge toward the center of the full heat exchange frame 11, so that the width of the air flow channel 112 gradually increases.

[0035] The advantage of the above embodiment is that: since the airflow is not evenly distributed when entering the airflow channel 112, the gas flow speed near the edge of the full heat exchange frame 11 is relatively slow, and the gas flow speed near the center of the full heat exchange frame 11 is relatively fast. Therefore, in order to better conduct the airflow entering the airflow channel 112, in this embodiment, the width of the airflow channel 112 near the edge of the full heat exchange frame 11 is set to be relatively narrow, and the width of the airflow channel 112 near the center of the full heat exchange frame 11 is set to be relatively wide, so that the airflow channel 112 in this embodiment can better realize the conduction of the airflow and improve the utilization rate of the airflow channel 112.

[0036] In a possible implementation, the partition bar 111 is made of a graphene composite PE material.

[0037] The advantages of the above embodiment are that the graphene composite PE material not only has good mechanical strength and toughness, but also has good thermal conductivity. Therefore, when the full heat exchange core 1 of the present invention is working, the partition bar 111 can improve the thermal conductivity between different layers of the full heat exchange frame 11, thereby improving the heat exchange efficiency of the full heat exchange core 1. At the same time, the better mechanical strength and toughness can also ensure the structural strength of the full heat exchange frame 11 and improve the stability of the structure.

[0038] Example 2

[0039] As mentioned above, the spoiler structure on the partition bar 111 is an arc-shaped spoiler protrusion 113. When the spoiler protrusion 113 in the aforementioned embodiment disturbs the airflow in the airflow channel 112, since the spoiler protrusions 113 are arranged opposite to each other in the airflow channel 112, the airflow channel 112 at the spoiler protrusion 113 will become narrower. When the airflow flows through the spoiler protrusion 113, the flow rate of the airflow will increase due to the reduction in the inner diameter of the airflow channel 112, thereby reducing the existence time of the airflow in the airflow channel 112 and causing the heat exchange efficiency to decrease. In order to solve this problem, the present embodiment is proposed. In this embodiment, the spoiler structure on the partition bar 111 is a spoiler fin. The spoiler fin is inclined on the partition bar 111 toward the direction of the airflow channel 112. The inclination direction of the spoiler fin is along the flow direction of the airflow in the airflow channel 112, and the spoiler fins on both sides of the same airflow channel 112 are staggered.

[0040] When the above-mentioned embodiment is adopted, during the operation of the full heat exchange core 1 of the present invention, after the gas enters the air flow channel 112, it will be alternately disturbed by the spoiler fins on both sides of the air flow channel 112. Compared with the spoiler effect of the evenly arranged arc-shaped spoiler protrusions 113 mentioned above, since the inclination direction of the spoiler fins is along the flow direction of the gas in the air flow channel 112, when the gas entering the air flow channel 112 passes through the spoiler fins, a backflow will be generated in the triangular area formed between the spoiler fins and the partition bar 111. The flow direction of the generated backflow is opposite to the flow direction of the original air flow in the air flow channel 112. Therefore, after the backflow acts on the original air flow, it can disturb the original air flow and reduce the flow speed of the original air flow, so that the original air flow can stay in the air flow channel 112 for a longer time, thereby ensuring the heat exchange efficiency of the full heat exchange core 1.

[0041] In addition, regarding the shape of the above-mentioned spoiler structure, those skilled in the art can also set the spoiler structure to other forms according to actual needs. For example, the inclination direction of the spoiler fins can be set to the direction opposite to the flow direction of the airflow in the airflow channel 112. In this way, although the resistance to the flow of gas in the airflow channel 112 is increased, it can achieve a more obvious spoiler effect. Therefore, those skilled in the art can choose to set the spoiler fins to this form to improve the heat exchange efficiency of the full heat exchange core 1, provided that the fan power can ensure the air supply and exhaust efficiency. These changes do not exceed the technical principles of the present invention and are therefore included in the scope of protection of the present invention.

[0042] It should be noted that the above-mentioned implementation mode is only used to illustrate the principle of the present invention and is not intended to limit the scope of protection of the present invention. Without departing from the principle of the present invention, those skilled in the art can adjust the above-mentioned structure so that the present invention can be applied to more specific application scenarios.

[0043] In addition, the present invention also provides a fresh air system, which includes the full heat exchange core 1 for the fresh air system mentioned in any one of the above technical solutions.

[0044] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A full heat exchange core for a fresh air system, characterized in that: The full heat exchange core includes a full heat exchange frame stacked layer by layer, and the full heat exchange frame includes a long strip of partition bars, an air flow channel is formed between two adjacent partition bars, and a spoiler structure is provided on the partition bar, which can disturb the flow of air in the air flow channel to reduce its flow rate.

2. The full heat exchange core for the fresh air system according to claim 1, characterized in that: The spoiler structure is a spoiler protrusion, which is in an arc shape. The arc-shaped spoiler protrusions are evenly distributed on the side walls of the partition bar and protrude toward the direction of the air flow channel.

3. The full heat exchange core for the fresh air system according to claim 2, characterized in that: The full heat exchange core also includes an upper cover plate and a handle installed on the upper cover plate. The upper cover plate is provided with a mounting hole for installing the handle. The handle includes a lifting portion and a clamping portion. The width of the clamping portion is greater than the diameter of the mounting hole, and the width of the lifting portion is less than or equal to the diameter of the mounting hole. Guide surfaces are provided on both sides of the clamping portion. The clamping portion can pass through the mounting hole and be clamped on the upper cover plate under the guidance of the guide surfaces.

4. The full heat exchange core for the fresh air system according to claim 2, characterized in that: The edges of the full heat exchange frame of the upper layer are provided with ribs and grooves, and the edges of the full heat exchange frame of the corresponding lower layer are provided with grooves and ribs. The ribs on the full heat exchange frames of the upper and lower layers are arranged alternately so that the ribs of the full heat exchange frames of the upper and lower layers can be respectively embedded in each other's grooves, so as to realize the sealing and fixation of the full heat exchange frame of the upper layer and the full heat exchange frame of the lower layer.

5. The full heat exchange core for the fresh air system according to claim 4, characterized in that: The full heat exchange core also includes an upper cover plate and a lower cover plate. Grooves and convex ribs are provided at the edges of the upper cover plate and / or the lower cover plate. The grooves and the convex ribs form a mortise and tenon fixing structure with the ribs and grooves on the full heat exchange frame to achieve sealing and fixing of the upper cover plate and / or the lower cover plate to the full heat exchange frame.

6. The full heat exchange core for the fresh air system according to claim 4, characterized in that: Fixing holes are provided at the edges of the full heat exchange frame. There are a plurality of fixing holes that are evenly distributed on the full heat exchange frame, so that heat exchange frames at different layers can be fixed by fasteners passing through the fixing holes.

7. The full heat exchange core for a fresh air system according to claim 1, characterized in that: A plurality of the long strip-shaped partition bars are provided, and the width of the air flow channel gradually increases along the edge of the full heat exchange frame toward the center.

8. The full heat exchange core for a fresh air system according to claim 1, characterized in that: A heat exchange membrane is provided between the full heat exchange frames of adjacent layers. The heat exchange membrane is a graphene polymer membrane, and / or the partition bar is a graphene composite PE material.

9. The full heat exchange core for a fresh air system according to claim 1, characterized in that: The spoiler structure is a spoiler fin, which is arranged on the dividing bar at an angle toward the airflow channel. The inclination direction of the spoiler fin is along the flow direction of the airflow in the airflow channel, and the spoiler fins on both sides of the same airflow channel are arranged alternately.

10. A fresh air system, characterized in that: The fresh air system includes the full heat exchange core for the fresh air system as described in any one of claims 1-9.

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