Fresh air equipment

Abstract

The utility model relates to the technical field of fresh air equipment, and discloses fresh air equipment. The fresh air equipment comprises a shell assembly, a heat exchange core assembly and a draught fan. The shell assembly is provided with an air channel communicating with the indoor environment and the outdoor environment. The heat exchange core assembly is arranged in the air duct and comprises a first heat exchange core and a second heat exchange core, and the first heat exchange core and the second heat exchange core are arranged in the length direction of the air duct; and the fan is arranged in the air duct and between the first heat exchange core and the second heat exchange core. The fan is arranged between the first heat exchange core and the second heat exchange core, the air volume loss can be reduced while the interference of fan noise to the indoor environment is reduced, and therefore noise control and air volume increase are effectively balanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fresh air equipment, and particularly relates to a fresh air equipment. BACKGROUND

[0002] At present, the fan of the through-wall fresh air machine is usually installed on the indoor side, and the noise generated by the fan during operation will directly enter the indoor environment, thereby causing interference to the daily life and work environment of the user and affecting the use experience of the user.

[0003] In order to reduce the noise of the fan, the related technology discloses an air handling unit, which comprises an outer cover, an indoor unit and a ventilation duct, wherein the ventilation duct communicates the internal environment and the external environment, and by arranging the reversible fan on one side of the external environment, the noise of the air handling unit during operation can be reduced.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related technology:

[0005] In the related technology, the reversible fan is installed on one side of the external environment, which can reduce the noise, but since the fan is far away from the indoor side, the air volume will be significantly reduced after passing through the long ventilation duct, which is difficult to meet the demand of different users for fresh air volume, thereby limiting the application range and user experience of the air handling unit.

[0006] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information which does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important components or delineate the protection scope of these embodiments, but as a prelude to the detailed description below.

[0008] The embodiments of the present disclosure provide a fresh air equipment to reduce the loss of air volume while reducing the interference of fan noise to the indoor environment.

[0009] According to a first aspect of the embodiments of the present utility model, a fresh air equipment is provided, which comprises a shell assembly, a heat exchange core assembly and a fan, the shell assembly is configured with an air duct communicating the indoor environment and the outdoor environment; the heat exchange core assembly is arranged in the air duct, and the heat exchange core assembly comprises a first heat exchange core and a second heat exchange core, the first heat exchange core and the second heat exchange core are arranged along the length direction of the air duct; the fan is arranged in the air duct, and the fan is arranged between the first heat exchange core and the second heat exchange core.

[0010] Optionally, the outer diameter of the fan is the same as the outer diameter of the first heat exchange core; and / or, the outer diameter of the fan is the same as the outer diameter of the second heat exchange core.

[0011] Optionally, the outer diameter of the fan is matched with the inner diameter of the air duct; and / or, the outer diameter of the first heat exchange core is matched with the inner diameter of the air duct; and / or, the outer diameter of the second heat exchange core is matched with the inner diameter of the air duct.

[0012] Optionally, the fresh air equipment further comprises: a first spacer arranged between the fan and the first heat exchange core, a first surface of the first spacer abutting against the first heat exchange core, and a second surface of the first spacer abutting against the fan.

[0013] Optionally, the fresh air equipment further comprises: a second spacer arranged between the fan and the second heat exchange core, a first surface of the second spacer abutting against the second heat exchange core, and a second surface of the second spacer abutting against the fan.

[0014] Optionally, the first spacer comprises a plurality of first spacer rings, the plurality of first spacer rings having different thicknesses, and the distance between the fan and the first heat exchange core is adjusted by using the first spacer rings with different thicknesses, each of the first spacer rings being provided with a first hollow portion to enable the airflow to pass through the first hollow portion; or, the first spacer comprises a plurality of first spacer rings, the distance between the fan and the first heat exchange core is adjusted by using the first spacer rings with different numbers, and each of the first spacer rings is provided with a first hollow portion to enable the airflow to pass through the first hollow portion.

[0015] Optionally, the first spacer ring is further provided with a first avoiding portion recessed inward from the outer surface of the first spacer ring to avoid the wiring; when the first avoiding portion is a plurality of first avoiding portions, the plurality of first avoiding portions are arranged at intervals along the circumference of the first spacer ring.

[0016] Optionally, the shell assembly comprises: a first shell; and a second shell arranged along the length direction of the air duct, the first shell and the second shell jointly enclosing the air duct, and the first shell and the second shell are detachably connected.

[0017] Optionally, the first heat exchange core and the second heat exchange core are heat exchange cores of different types.

[0018] Optionally, the fan is a reversible fan; and / or, the first heat exchange core is a ceramic heat exchange core; and / or, the second heat exchange core is a ceramic heat exchange core.

[0019] The fresh air equipment provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] Placing the fan between the first and second heat exchange cores increases the distance between the fan and the indoor environment. Noise generated by the fan during operation is reduced by the sound insulation of the heat exchange cores before reaching the indoor environment, thus minimizing noise transmission and interference. Simultaneously, placing the fan between the first and second heat exchange cores also avoids excessive distance between the fan and the indoor environment, reducing airflow resistance within the duct and thereby increasing airflow to some extent. This effectively balances noise control and increased airflow while minimizing fan noise interference with the indoor environment.

[0021] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a fresh air device provided in an embodiment of this disclosure;

[0024] Figure 2 This is a schematic diagram of another fresh air device provided in an embodiment of this disclosure;

[0025] Figure 3 This is a schematic diagram of the structure of another fresh air device provided in an embodiment of this disclosure;

[0026] Figure 4 This is a schematic diagram of another fresh air device provided in an embodiment of this disclosure, wherein the arrow indicates the length direction of the air duct;

[0027] Figure 5 This is an exploded view of a fresh air device provided in an embodiment of the present disclosure, wherein the arrow indicates the axial direction of the first spacer.

[0028] Figure label:

[0029] 10: Housing assembly; 11: Air duct; 12: First housing; 121: Snap-fit ​​part; 122: Buckle; 123: Insert; 13: Second housing; 131: Snap-fit ​​mating part; 132: Slot; 133: Slot;

[0030] 20: Heat exchange core assembly; 21: First heat exchange core; 22: Second heat exchange core;

[0031] 30: Fan;

[0032] 40: First spacer; 41: First spacer ring; 42: First hollowed-out portion; 43: First clearance portion; 432: Recess; 433: Protrusion;

[0033] 50: Second spacer; 51: Second spacer ring; 52: Second hollowed-out part; 53: Second clearance part;

[0034] 60: Cylinder body;

[0035] 70: Indoor environment; 71: Outdoor environment. Detailed Implementation

[0036] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0037] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0038] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0039] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0040] Unless otherwise stated, the term "multiple" means two or more.

[0041] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0042] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0044] Combination Figures 1-5 As shown, this disclosure provides a fresh air device, including a housing assembly 10, a heat exchange core assembly 20, and a fan 30.

[0045] The outer casing assembly 10 is constructed with an air duct 11 that connects the indoor environment 70 and the outdoor environment 71; the heat exchange core assembly 20 is disposed in the air duct 11, and the heat exchange core assembly 20 includes a first heat exchange core 21 and a second heat exchange core 22, which are arranged along the length of the air duct 11; the fan 30 is disposed in the air duct 11, and the fan 30 is disposed between the first heat exchange core 21 and the second heat exchange core 22.

[0046] The air duct 11 of the fresh air system connects the indoor environment 70 and the outdoor environment 71, allowing air from the indoor environment 70 to be exhausted to the outdoor environment 71 and fresh air from the outdoor environment 71 to be introduced into the indoor environment 70. The heat exchange core assembly 20 absorbs and stores heat or cold from the exhaust airflow and transfers the stored heat or cold to the fresh airflow, thus achieving energy recovery and reuse. The heat exchange core assembly 20 is equipped with multiple heat exchange cores, increasing the heat exchange area and time, thereby effectively improving the heat exchange effect between the airflow and the heat exchange components. The length direction of the air duct 11 is as follows... Figure 4As indicated by the middle arrow, the first heat exchange core 21 and the second heat exchange core 22 are arranged along the length of the air duct 11, that is, along the flow direction of the airflow in the air duct 11. This arrangement ensures that the first heat exchange core 21 and the second heat exchange core 22 can fully contact the airflow. This arrangement effectively utilizes the space of the air duct 11, allowing the exhaust airflow and fresh airflow to better exchange heat with the first heat exchange core 21 and the second heat exchange core 22, thereby improving the heat exchange efficiency of the heat exchange core assembly 20.

[0047] By employing the fresh air equipment provided in this embodiment, placing the fan 30 between the first heat exchange core 21 and the second heat exchange core 22 increases the distance between the fan 30 and the indoor environment 70. The noise generated by the fan 30 during operation is reduced by the sound insulation effect of the heat exchange cores before reaching the indoor environment 70, effectively reducing noise propagation and minimizing interference with the indoor environment 70. Simultaneously, placing the fan 30 between the first heat exchange core 21 and the second heat exchange core 22 also avoids excessive distance between the fan 30 and the indoor environment 70, reducing airflow resistance within the duct 11 and thus increasing airflow to a certain extent. In this way, while reducing noise interference from the fan 30 to the indoor environment 70, airflow loss is also reduced, effectively balancing noise control and airflow improvement.

[0048] The fan 30 is located between the first heat exchange core 21 and the second heat exchange core 22, allowing the airflow to directly enter the first heat exchange core 21 or the second heat exchange core 22 for heat exchange after passing through the fan 30. This also avoids excessively long detours of the airflow within the duct 11, shortening the airflow path. This optimizes the airflow path, improves heat exchange efficiency, and thus enhances the overall performance of the fresh air system.

[0049] In addition, the first heat exchange core 21 and the second heat exchange core 22 are arranged along the length of the air duct 11, making the space occupied by the entire heat exchange core assembly 20 in the air duct 11 more compact, which is conducive to improving space utilization.

[0050] Optionally, combined Figure 1 and Figure 5 As shown, the fresh air equipment also includes a first spacer 40, which is disposed between the fan 30 and the first heat exchange core 21. The first surface of the first spacer 40 abuts against the first heat exchange core 21, and the second surface of the first spacer 40 abuts against the fan 30.

[0051] By setting a first spacer 40 between the fan 30 and the first heat exchange core 21, the distance between the fan 30 and the first heat exchange core 21 can be increased, and the installation stability of the fan 30 and the first heat exchange core 21 in the air duct 11 can be improved, reducing vibration and displacement during operation.

[0052] Optionally, the first spacer 40 includes a plurality of first spacer rings 41 with different thicknesses. The distance between the fan 30 and the first heat exchange core 21 is adjusted by using first spacer rings 41 with different thicknesses. Each first spacer ring 41 is provided with a first perforated portion 42 so that airflow can pass through the first perforated portion 42.

[0053] The first spacer 40 includes multiple first spacer rings 41 of different thicknesses. By setting first spacer rings 41 of different thicknesses between the fan 30 and the first heat exchange core 21, the distance between the first heat exchange core 21 and the fan 30 can be adjusted. The first spacer rings 41 are connected to the fan 30 and the first heat exchange core 21. This allows for a balance between heat exchange efficiency, airflow distribution, and noise level in the fresh air system by replacing the first spacer rings 41 of different thicknesses according to installation requirements, thereby achieving better ventilation and noise reduction effects.

[0054] Optionally, the first spacer 40 includes a plurality of first spacer rings 41, and the distance between the fan 30 and the first heat exchange core 21 is adjusted by using different numbers of first spacer rings 41. Each first spacer ring 41 is provided with a first perforation 42 so that airflow can pass through the first perforation 42.

[0055] The first spacer 40 includes multiple first spacer rings 41. By setting different numbers of first spacer rings 41 between the fan 30 and the first heat exchange core 21, the distance between the fan 30 and the first heat exchange core 21 can be adjusted. In this way, according to installation requirements, the number of first spacer rings 41 can be adjusted to achieve a balance between heat exchange efficiency, airflow distribution, and noise level in the fresh air equipment, thereby achieving better ventilation and noise reduction effects.

[0056] The first spacer ring 41 is provided with a first hollow part 42, which allows airflow to pass smoothly through the first hollow part 42, thereby avoiding the setting of the first spacer ring 41 from affecting the exhaust and air supply effect.

[0057] The first hollow portion 42 can be the center hole of the first spacer ring 41. The axial direction of the first spacer ring 41 is as follows: Figure 5 As indicated by the middle arrow. The axial direction of the first spacer ring 41 is consistent with the length direction of the air duct 11, and the central hole of the first spacer ring 41 allows airflow to pass through.

[0058] For example, the first heat exchange core 21 is disposed near the indoor environment, and the first spacer 40 is disposed between the fan 30 and the first heat exchange core 21. In this case, the placement of the first spacer 40 increases the distance between the fan 30 and the first heat exchange core 21, thereby increasing the distance between the fan 30 and the indoor environment 70. This reduces the intensity of noise generated by the fan 30 during operation that is directly transmitted to the first heat exchange core 21 and enters the indoor environment 70, thus helping to reduce noise propagation.

[0059] Optionally, combined Figure 5 As shown, the first spacer ring 41 is also provided with a first avoidance part 43. The first avoidance part 43 is recessed inward from the outer surface of the first spacer ring 41 to avoid the wiring. When there are multiple first avoidance parts 43, the multiple first avoidance parts 43 are arranged at intervals along the circumference of the first spacer ring 41.

[0060] There are wiring issues for electrical components such as the fan 30 within the air duct 11 of the fresh air system. To avoid interfering with normal wiring, the outer surface of the first spacer ring 41 is recessed inward to form a first clearance portion 43, through which the wire harness can be passed. The first clearance portion 43 provides space for the wire harness, preventing interference between the wire harness and the first spacer ring 41, thus keeping the air duct 11 neat and orderly. At the same time, the first clearance portion 43 also provides support and fixation for the wire harness, preventing displacement or damage due to vibration or airflow during equipment operation, thereby improving the stability and safety of the wire harness.

[0061] The first spacing ring 41 can be provided with multiple first avoidance parts 43, and the multiple first avoidance parts 43 can be used for separate wiring. This allows different wire harnesses to be arranged separately, avoiding mutual interference between wire harnesses. The multiple first avoidance parts 43 are arranged at intervals along the circumference of the first spacing ring 41, which makes the wiring more uniform and reasonable. This layout not only improves space utilization, but also makes the distribution of wire harnesses more balanced, reducing the phenomenon of local concentration or congestion of wire harnesses.

[0062] For example, a plurality of first clearance portions 43 are provided circumferentially in the first spacer ring 41. The plurality of first clearance portions 43 are recessed inward from the outer surface of the first spacer ring 41, forming a continuous concave-convex structure. The concave-convex structure includes convex portions 433 and concave portions 432, both of which can serve a spacer function. At the same time, the concave portions 432 can provide wiring space, and the convex portions 433 can provide support by abutting against the housing assembly 10.

[0063] Optionally, combined Figure 5 As shown, the outer diameter of the first spacer 40 is matched with the inner diameter of the air duct 11.

[0064] The outer diameter of the first spacer 40 is adapted to the inner diameter of the air duct 11, allowing the first spacer 40 to fit tightly within the air duct 11, forming a stable support, and also guiding airflow more smoothly through the air duct 11. When a first relief portion 43 with a concave-convex structure is formed on the outer surface of the first spacer ring 41, the protrusion 433 can fit against the inner wall of the air duct 11, improving the stability of the first spacer ring 41.

[0065] Optionally, combined Figure 5 As shown, the outer diameter of the first spacer 40 is the same as the outer diameter of the fan 30 and the outer diameter of the first heat exchange core 21.

[0066] The first spacer 40, fan 30, and first heat exchange core 21 all share the same outer diameter, ensuring high interchangeability among components. This facilitates positional adjustments and streamlines the assembly and maintenance of the fresh air system. The uniform outer diameter allows for a close arrangement of the fan 30, first heat exchange core 21, and first spacer 40 within the duct 11, reducing the overall volume of the fresh air system and optimizing space utilization. Furthermore, this design reduces airflow resistance and eddies, thereby improving airflow efficiency and minimizing airflow loss.

[0067] Optionally, the fresh air equipment also includes a second spacer 50, which is disposed between the fan 30 and the second heat exchange core 22. The first side of the second spacer 50 abuts against the second heat exchange core 22, and the second side of the second spacer 50 abuts against the fan 30.

[0068] The second spacer 50 is provided between the fan 30 and the second heat exchange core 22, which can increase the distance between the fan 30 and the second heat exchange core 22, and also improve the installation stability of the fan 30 and the second heat exchange core 22 in the air duct 11, and reduce vibration and displacement during operation.

[0069] The second spacer 50 can have the same structure as the first spacer 40. The second spacer can be provided with multiple second spacer rings 51 of different thicknesses. By providing second spacer rings 51 of different thicknesses between the fan 30 and the second heat exchange core 22, the distance between the second heat exchange core 22 and the fan 30 can be adjusted. Alternatively, the second spacer 50 can be provided with multiple second spacer rings 51, and the distance between the fan 30 and the second heat exchange core 22 can be adjusted by using different numbers of second spacer rings 51.

[0070] Optionally, the second spacer ring 51 is provided with a second perforated portion 52, through which airflow can pass smoothly. This avoids the second spacer ring 51 affecting the exhaust and air supply effects.

[0071] Optionally, the second spacer ring 51 is provided with a second clearance portion 53, which is recessed inward from the outer surface of the second spacer ring 51 to avoid wiring. When there are multiple second clearance portions 53, they are spaced apart circumferentially along the second spacer ring 51. This can effectively prevent interference between the wiring harness and the second spacer ring 51 and improve the cleanliness of the air duct.

[0072] Optionally, combined Figure 2 , Figure 4 and Figure 5 As shown, the outer casing assembly 10 includes a first casing 12 and a second casing 13. The second casing 13 and the first casing 12 are arranged along the length direction of the air duct 11. The first casing 12 and the second casing 13 together enclose the air duct 11, and the first casing 12 and the second casing 13 are detachably connected.

[0073] The arrangement of the first housing 12 and the second housing 13 along the length of the air duct 11 makes the entire outer casing assembly 10 more compact in layout, facilitating the installation of the fresh air equipment in a limited space. The heat exchange core assembly 20 and the fan 30 are both located inside the air duct 11. The first heat exchange core 21 and the second heat exchange core 22 are arranged in the same direction as the first housing 12 and the second housing 13, both along the length of the air duct 11. This allows airflow to flow smoothly within the air duct 11, passing sequentially through the various components, including the heat exchange core assembly 20 and the fan 30, thereby improving airflow efficiency and effectively reducing energy loss.

[0074] The first housing 12 and the second housing 13 are detachably connected, making the installation and disassembly of the heat exchange core assembly 20 and the fan 30 much easier. When installing the fresh air system, the heat exchange core assembly 20 and the fan 30 can be installed separately first, and then the first housing 12 and the second housing 13 can be closed and secured. When maintenance, cleaning, or component replacement is required, the detachable connection allows for quick opening of the outer housing assembly 10, providing direct access to the heat exchange core assembly 20 and the fan 30. After maintenance or cleaning, the first housing 12 and the second housing 13 can be quickly reassembled. This simplifies the installation and disassembly process, reduces the difficulty of installation and disassembly, facilitates adjustments to the installation positions of the heat exchange core assembly 20 and the fan 30, and improves the installation flexibility of the fresh air system.

[0075] Optionally, combined Figure 4 and Figure 5 As shown, the first housing 12 is provided with a snap-fit ​​part 121, and the second housing 13 is provided with a snap-fit ​​mating part 131. The snap-fit ​​part 121 and the snap-fit ​​mating part 131 cooperate to make the first housing 12 and the second housing 13 detachably connected.

[0076] The first housing 12 and the second housing 13 are detachably connected by a snap-fit ​​mechanism, which enables quick assembly and disassembly and makes it easier to replace the heat exchange components and the fan 30.

[0077] Optionally, combined Figure 5 As shown, one of the snap-fit ​​part 121 and the snap-fit ​​mating part 131 includes a snap-fit ​​122 and the other includes a snap-fit ​​groove 132. When the first housing 12 is connected to the second housing 13, the snap-fit ​​122 and the snap-fit ​​groove 132 are snapped together.

[0078] The connection between the buckle 122 and the slot 132 is simple to operate. The first housing 12 and the second housing 13 are detachably connected through the engagement of the buckle 122 and the slot 132, which can improve the installation efficiency of the fresh air equipment. The tight engagement of the buckle 122 and the slot 132 also provides a stable connection force, improving the stability of the housing assembly 10 in the connected state, thereby improving the sealing performance of the air duct 11. It is understood that the snap-fit ​​part 121 and the snap-fit ​​mating part 131 can also adopt other snap-fit ​​mating structures such as claws and holes.

[0079] Optionally, the first housing is provided with a first buckle and a first slot, and the second housing is provided with a second slot and a second buckle accordingly. The first buckle engages with the second slot, and the first slot engages with the second buckle.

[0080] The snap-fit ​​structure of multiple sets of buckles 122 and slots 132 can improve the connection strength between the first housing and the second housing, thereby improving the stability of the housing assembly.

[0081] Optionally, combined Figure 5 As shown, one of the snap-fit ​​portion 121 and the snap-fit ​​mating portion 131 includes a insert 123 and the other includes a slot 133. When the first housing 12 is connected to the second housing 13, the insert 123 is inserted into the slot 133.

[0082] When the first housing 12 is connected to the second housing 13, the insert 123 is embedded in the slot 133, which can improve the connection stability between the first housing 12 and the second housing 13.

[0083] Optionally, combined Figure 4 and Figure 5 As shown, the first housing is provided with a insert 123, which extends outward from the edge of the first housing 12 toward the second housing 13; the second housing 13 is provided with a slot 133, which is recessed into the surface of the second housing 13; wherein, when the first housing 12 and the second housing 13 are connected, the insert 123 is embedded in the slot 133, and the insert 123 is flush with the surface of the second housing 13.

[0084] This allows the first housing 12 and the second housing 13 to fit tightly together, thereby improving the airtightness of the air duct. It also makes the housing assembly compact and has a smooth appearance. It is understood that the second housing can also be provided with slots, and corresponding inserts can be provided on the second housing.

[0085] Optionally, combined Figure 5 As shown, the buckle 122 is located in the slot 133, and the slot 132 is located in the insert 123. When the insert 123 is inserted into the slot 133, the buckle 122 and the slot 132 engage.

[0086] By setting a buckle on the slot and a slot on the insert, and achieving the engagement of the buckle 122 and the slot 132 when the insert is inserted into the slot, a double engagement structure is formed. This effectively enhances the connection strength and anti-loosening performance of the housing assembly, and also improves the convenience of installation and disassembly.

[0087] Optionally, combined Figure 5 As shown, the outer diameter of the fan 30 is the same as the outer diameter of the first heat exchange core 21.

[0088] This allows the airflow through the fan 30 to more evenly cover the entire surface of the first heat exchange core 21, thereby improving heat exchange efficiency. The outer diameter of the fan 30 is the same as that of the first heat exchange core 21, ensuring that the airflow enters the first heat exchange core 21 evenly and smoothly after passing through the fan 30. This reduces airflow impact and abrupt changes in direction, lowers turbulence, and effectively reduces the noise level of the fresh air system during operation. When adjusting the distance between the fan and the first heat exchange core using the first spacer, the fact that the outer diameter of the fan 30 is the same as that of the first heat exchange core 21 facilitates positional adjustments between the fan 30 and the first heat exchange core 21, improving installation flexibility.

[0089] Optionally, combined Figure 5 As shown, the outer diameter of the fan 30 is the same as the outer diameter of the second heat exchange core 22.

[0090] The outer diameter of the fan 30 is the same as that of the second heat exchange core 22, achieving the same effect as when the outer diameter of the fan 30 is the same as that of the first heat exchange core 21. This allows the airflow passing through the fan 30 to more evenly cover the entire surface of the second heat exchange core 22, thereby improving heat exchange efficiency. The fact that the outer diameter of the fan 30 is the same as that of the second heat exchange core 22 also ensures that the airflow enters the second heat exchange core 22 evenly and smoothly after passing through the fan 30, reducing airflow impact and abrupt changes in direction, lowering turbulence, and effectively reducing the noise level of the fresh air system during operation. When adjusting the distance between the fan and the second heat exchange core using the second spacer, the fact that the outer diameter of the fan 30 is the same as that of the second heat exchange core 22 facilitates positional adjustments of the fan 30 and the second heat exchange core 22, improving installation flexibility.

[0091] The outer diameter of the fan 30 can be the same as the outer diameter of the first heat exchange core 21. The outer diameter of the fan 30 can also be the same as the outer diameter of the second heat exchange core 22. This application uses the example where the outer diameters of the fan 30, the first heat exchange core 21, and the second heat exchange core 22 are all the same.

[0092] For example, the fan 30 is a reversible fan 30, the first heat exchange core 21 is disposed near the indoor environment side, and the second heat exchange core 22 is disposed near the outdoor environment side. The outer diameter of the reversible fan 30, the outer diameter of the first heat exchange core 21, and the outer diameter of the second heat exchange core 22 are all the same.

[0093] During the exhaust process of the fresh air system, air in the indoor environment 70 flows into the air duct 11 under the action of the reversible fan 30. The exhaust airflow flows sequentially through the first heat exchange core 21, the reversible fan 30, and the second heat exchange core 22, and is finally discharged to the outdoor environment 71. During the supply process of the fresh air system, the reversible fan 30 changes direction, and air in the outdoor environment 71 enters the air duct 11 under the action of the reversible fan 30. The fresh airflow flows sequentially through the second heat exchange core 22, the reversible fan 30, and the first heat exchange core 21, and is finally supplied to the indoor environment 70. The outer diameter of the reversible fan 30 is the same as the outer diameter of the first heat exchange core 21 and the second heat exchange core 22, so that the exhaust airflow passing through the reversible fan 30 can more evenly cover the entire surface of the second heat exchange core 22, and the fresh airflow passing through the reversible fan 30 can more evenly cover the entire surface of the first heat exchange core 21. This allows the exhaust and fresh airflows to fully contact the first heat exchange core 21 and the second heat exchange core 22, respectively, improving heat exchange efficiency and reducing energy loss. Simultaneously, the outer diameter of the reversible fan 30 is the same as that of the first and second heat exchange cores 21 and 22. This facilitates flexible adjustment of the reversible fan 30's position according to different usage scenarios and needs, achieving optimal ventilation and noise reduction effects and improving the equipment's versatility. Alternatively, the second heat exchange core could be positioned closer to the indoor environment, and the first heat exchange core closer to the outdoor environment.

[0094] Optionally, combined Figure 5 As shown, the outer diameter of the fan 30 is matched with the inner diameter of the duct 11.

[0095] The outer diameter of the fan 30 is matched with the inner diameter of the duct 11, meaning that the outer diameter of the fan 30 is equal to the inner diameter of the duct 11, or the outer diameter of the fan 30 is slightly smaller than the inner diameter of the duct 11. This increases the contact area between the fan 30 and the airflow inside the duct 11, allowing for more effective utilization of the thrust of the fan 30, thereby improving the air supply or exhaust effect of the fan 30.

[0096] Optionally, combined Figure 5 As shown, the outer diameter of the first heat exchange core 21 is matched with the inner diameter of the air duct 11.

[0097] The outer diameter of the first heat exchange core 21 is matched with the inner diameter of the air duct 11, meaning that the outer diameter of the first heat exchange core 21 is equal to the inner diameter of the air duct 11, or the outer diameter of the first heat exchange core 21 is slightly smaller than the inner diameter of the air duct 11. This increases the contact area between the first heat exchange core 21 and the airflow within the air duct 11, reduces airflow diffusion and energy loss within the air duct 11, and improves heat exchange efficiency. Simultaneously, this also improves the space utilization of the air duct 11.

[0098] Optionally, combined Figure 3 As shown, the outer diameter of the second heat exchange core 22 is matched with the inner diameter of the air duct 11.

[0099] The outer diameter of the second heat exchange core 22 is matched with the inner diameter of the air duct 11, meaning that the outer diameter of the second heat exchange core 22 is equal to the inner diameter of the air duct 11, or the outer diameter of the second heat exchange core 22 is slightly smaller than the inner diameter of the air duct 11. This increases the contact area between the second heat exchange core 22 and the airflow in the air duct 11, reduces the diffusion and energy loss of the airflow in the air duct 11, and improves the heat exchange efficiency.

[0100] Optionally, the first heat exchange core 21 and the second heat exchange core 22 may use different types of heat exchange cores.

[0101] The first heat exchange core 21 and the second heat exchange core 22 can be made of different types of heat exchange cores depending on specific environmental conditions and usage requirements. The first heat exchange core 21 and the second heat exchange core 22 can be made of ceramic heat exchange cores, PET heat exchange cores, graphene heat exchange cores, resin heat exchange cores, stainless steel heat exchange cores, plastic heat exchange cores, etc. Using different types of heat exchange cores can better adapt to different performance requirements and environmental conditions.

[0102] For example, the first heat exchange core 21 can be a PET sensible heat exchange core, and the second heat exchange core 22 can be a graphene total heat exchange core. The PET sensible heat exchange core has high thermal conductivity, and the graphene total heat exchange core has high moisture permeability, thus achieving better sensible heat exchange and humidity exchange effects simultaneously. It is understood that the first heat exchange core 21 and the second heat exchange core 22 can also use the same type of heat exchange core.

[0103] Optionally, the fan 30 is a reversible fan 30.

[0104] The reversible fan 30 can change the airflow direction as needed to achieve bidirectional ventilation. Only one fan 30 is needed for both supply and exhaust air, meeting different ventilation requirements. This reduces the number of fans 30 required and saves installation space.

[0105] Optionally, the first heat exchange core 21 is a ceramic heat exchange core; and / or, the second heat exchange core 22 is a ceramic heat exchange core.

[0106] The ceramic heat exchange core has high thermal conductivity, low coefficient of thermal expansion and good corrosion resistance, which can significantly improve the heat exchange efficiency and service life of the first heat exchange core 21 or the second heat exchange core 22, and is also suitable for a variety of environments.

[0107] Optionally, the fresh air equipment also includes a filter element, which is located on the side of the air duct 11 near the indoor environment and / or on the side of the air duct 11 near the outdoor environment.

[0108] The filter effectively removes pollutants such as dust, pollen, bacteria, viruses, and PM2.5 from the air, resulting in 70% cleaner air entering the indoor environment and improving indoor air quality. The filter can be a pre-filter.

[0109] Optionally, combined ​ As shown, the fresh air equipment also includes a cylinder 60, which is fitted onto the outside of the outer casing assembly.

[0110] The cylinder 60 provides protection for the outer casing components, thereby improving the structural stability of the fresh air system.

[0111] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A fresh air device, characterized in that The new air equipment comprises: a housing assembly configured with an air duct communicating an indoor environment and an outdoor environment; a heat exchange core assembly arranged in the air duct, the heat exchange core assembly comprising a first heat exchange core and a second heat exchange core arranged along a length direction of the air duct; a fan arranged in the air duct, the fan being arranged between the first heat exchange core and the second heat exchange core.

2. The new air equipment according to claim 1, wherein: an outer diameter of the fan is the same as an outer diameter of the first heat exchange core; and / or an outer diameter of the fan is the same as an outer diameter of the second heat exchange core.

3. The new air equipment according to claim 1, wherein: an outer diameter of the fan is adapted to an inner diameter of the air duct; and / or an outer diameter of the first heat exchange core is adapted to the inner diameter of the air duct; and / or an outer diameter of the second heat exchange core is adapted to the inner diameter of the air duct.

4. The fresh air device of claim 1, wherein, Further comprising: a first spacer arranged between the fan and the first heat exchange core, a first surface of the first spacer abutting against the first heat exchange core, and a second surface of the first spacer abutting against the fan.

5. The fresh air device according to claim 4, characterized in that, Further comprising: a second spacer arranged between the fan and the second heat exchange core, a first surface of the second spacer abutting against the second heat exchange core, and a second surface of the second spacer abutting against the fan.

6. The new air equipment according to claim 4, wherein: the first spacer comprises a plurality of first spacer rings, the plurality of first spacer rings having different thicknesses, and the distance between the fan and the first heat exchange core is adjusted by using the first spacer rings having different thicknesses, each of the first spacer rings being provided with a first hollow portion to allow airflow to pass through the first hollow portion; or the first spacer comprises a plurality of first spacer rings, and the distance between the fan and the first heat exchange core is adjusted by using the first spacer rings in different numbers, each of the first spacer rings being provided with a first hollow portion to allow airflow to pass through the first hollow portion.

7. The new air equipment according to claim 6, wherein: the first spacer ring is further provided with a first avoiding portion recessed inward from an outer surface of the first spacer ring to avoid wiring, and a plurality of the first avoiding portions are arranged at intervals along a circumferential direction of the first spacer ring.

8. The fresh air device according to any one of claims 1 to 7, characterized in that The housing assembly comprises: a first housing; a second housing arranged along a length direction of the air duct, the first housing and the second housing jointly enclosing the air duct, and the first housing and the second housing being detachably connected.

9. The new air equipment according to any one of claims 1 to 7, wherein: the first heat exchange core and the second heat exchange core are heat exchange cores of different types.

10. The new air equipment according to any one of claims 1 to 7, wherein: the fan is a reversible fan; and / or the first heat exchange core is a ceramic heat exchange core; and / or the second heat exchange core is a ceramic heat exchange core.

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