Fresh air equipment

Abstract

The invention relates to the technical field of air conditioning, and provides fresh air equipment which comprises a shell, a heat exchange core, a fresh air fan and an exhaust fan, and the heat exchange core is located in the shell and extends in the first direction; the fresh air fan is located in the shell. The fresh air fan is located in the shell, the exhaust fan is located in the shell, the fresh air fan and the exhaust fan are arranged in the second direction and located on the same side of the heat exchange core in the first direction, and the first direction is perpendicular to the second direction. The fresh air fan and the exhaust fan are both located on the same side of the heat exchange core in the first direction, the fresh air fan and the exhaust fan cannot increase the size of the shell in the first direction, and the fresh air fan, the exhaust fan and the heat exchange core are compact in structure. The fresh air fan and the exhaust fan are arranged in the second direction, the space of the shell in the second direction is fully utilized, the space of the shell in the first direction and the space of the shell in the second direction are comprehensively considered, and therefore the overall size of the fresh air equipment is reduced, and the miniaturization requirement is met.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and more particularly to a fresh air device. Background Technology

[0002] This section is intended to provide background or context for embodiments of this application. The description herein is not intended to imply that it is prior art simply because it is included in this section.

[0003] Fresh air systems are used to bring outdoor air into a room and exhaust indoor air to the outside. However, current technologies often result in large, space-consuming fresh air systems, making them suitable for spacious homes and larger apartments. They are less suitable for smaller spaces like bathrooms, kitchens, or smaller apartments, limiting their application. There is a trend towards miniaturization in fresh air systems to accommodate more diverse applications. Summary of the Invention

[0004] In view of this, this application aims to provide a fresh air device with a compact structure to meet the requirements of miniaturization.

[0005] This application provides a fresh air device, including:

[0006] shell;

[0007] A heat exchange core is located inside the housing and extends along a first direction;

[0008] The fresh air fan is located inside the housing;

[0009] An exhaust fan is located inside the housing. The fresh air fan and the exhaust fan are arranged along the second direction and are both located on the same side of the heat exchange core along the first direction. The first direction and the second direction are perpendicular to each other.

[0010] In some embodiments, the outer casing has a return air inlet and a fresh air inlet formed on two opposite sidewalls along the second direction, and the circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface and a fresh air inlet surface, with the return air inlet surface located on the side of the fresh air inlet surface closer to the return air inlet.

[0011] In some embodiments, the fresh air intake surface is tilted toward the fresh air inlet.

[0012] In some embodiments, the fresh air device includes a partition that defines a space within the housing as a heat exchange chamber and a fan chamber, the fan chamber being located on one side of the heat exchange chamber along a first direction, the heat exchange core being located within the heat exchange chamber, and both the fresh air fan and the exhaust fan being located within the fan chamber.

[0013] In some embodiments, the separator includes a partition plate connecting the heat exchange core and the return air inlet to separate the heat exchange chamber into a return air channel and a supply air channel. The return air channel is located on a first side of the supply air channel along a third direction, and the return air inlet surface is a portion of the surface of the return air channel. The first direction, the second direction, and the third direction are perpendicular to each other.

[0014] In some embodiments, the circumferential surface of the heat exchange core surrounding the first direction includes an air supply outlet surface, which is opposite to the fresh air inlet surface, and the air supply outlet surface is a portion of the surface of the air supply channel.

[0015] In some embodiments, the fan cavity includes an air supply chamber located on one side of the air supply channel along a first direction, the fresh air fan is located in the air supply chamber, and the air supply chamber communicates with the air supply channel.

[0016] In some embodiments, the separator includes an isolation plate connecting the heat exchange core and the fresh air inlet to separate the heat exchange chamber into a fresh air channel and an exhaust air channel. The fresh air channel is located on a first side of the exhaust air channel along a third direction, and the fresh air inlet surface is a portion of the surface of the fresh air channel. The first direction, the second direction, and the third direction are perpendicular to each other.

[0017] In some embodiments, the circumferential surface of the heat exchange core surrounding the first direction includes an exhaust air outlet surface, which is opposite to the return air inlet surface, and the exhaust air outlet surface is a portion of the surface of the exhaust channel.

[0018] In some embodiments, the fan cavity includes an exhaust chamber located on one side of the exhaust duct along a first direction, the exhaust fan is located in the exhaust chamber, and the exhaust chamber communicates with the exhaust duct.

[0019] In some embodiments, the housing has a return air inlet and a supply air inlet on one side wall along the second direction, and a fresh air inlet and an exhaust air inlet on the other side wall along the second direction. The airflow outlet of the fresh air fan is connected to the supply air inlet, and the airflow outlet of the exhaust fan is connected to the exhaust air inlet.

[0020] In some embodiments, the fresh air device includes a control device disposed outside the housing, the control device being located on a sidewall of the housing along a second direction.

[0021] In some embodiments, the circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface, a fresh air inlet surface, an exhaust air outlet surface, and a supply air outlet surface. The exhaust air outlet surface is opposite to the return air inlet surface, and the supply air outlet surface is opposite to the fresh air inlet surface. The return air inlet surface, the fresh air inlet surface, the exhaust air outlet surface, and the supply air outlet surface are connected in sequence.

[0022] In some embodiments, one inner surface of the housing along a third direction is a bearing surface, the exhaust outlet faces the bearing surface, and the angle between the exhaust outlet and the bearing surface is α, 15°≤α≤30°, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0023] In some embodiments, the axis of the fresh air fan and the axis of the exhaust fan both extend along a first direction.

[0024] The fresh air equipment provided in this application embodiment, if the fresh air fan and exhaust fan are located on different sides of the heat exchange core along the first direction, the fresh air fan and exhaust fan respectively occupy the space inside the casing along the first direction, causing the size of the casing along the first direction to increase; however, if the fresh air fan and exhaust fan are both located on the same side of the heat exchange core along the first direction, the fresh air fan and exhaust fan will not increase the size of the casing along the first direction, and the structure of the fresh air fan, exhaust fan, and heat exchange core is compact. The fresh air fan and exhaust fan are arranged along the second direction, making full use of the space of the casing along the second direction. By comprehensively considering the space of the casing along the first and second directions, the overall size of the fresh air equipment is reduced, meeting the miniaturization requirements. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a fresh air device in one embodiment of this application;

[0026] Figure 2 for Figure 1 A schematic diagram of the fresh air system from another perspective, omitting some structural elements. In this diagram, the first airflow path X1 is the indoor airflow path, and the second airflow path X2 is the outdoor airflow path.

[0027] Figure 3 for Figure 1 A partial cross-sectional view of the fresh air system, in which the dashed arrows schematically show the flow direction of indoor and outdoor airflow within the heat exchange core;

[0028] Figure 4 for Figure 1 A schematic diagram of part of the structure of a fresh air system;

[0029] Figure 5 This is a schematic diagram of a portion of the outer casing and partitions in one embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the structure of the separator in one embodiment of this application;

[0031] Figure 7 for Figure 6 A schematic diagram of the separator from another perspective;

[0032] Figure 8 for Figure 1 Another partial cross-sectional view of the fresh air unit shown, in which the dashed arrows schematically indicate the direction of outdoor airflow within the air supply duct.

[0033] Explanation of reference numerals in the attached figures

[0034] 1. Outer shell; 1a. Return air inlet; 1b. Fresh air inlet; 1c. Supply air outlet; 1d. Exhaust air outlet; 1e. Load-bearing surface; 10a. Heat exchange chamber; 101a. Return air duct; 102a. Supply air duct; 103a. Exhaust air duct; 104a. Fan chamber; 10b. Supply air chamber; 101b. Exhaust air chamber; 102b. Heat exchange core 2; 2a. Return air inlet surface; 2b. Fresh air inlet surface; 2c. Supply air outlet surface; 2d. Fresh air outlet... 3. Unit; 4. Exhaust fan; 5. Separator; 51. Separator plate; 511. Guide plate body; 511a. Return air guide surface; 511aa. Recessed area; 511ab. Protruding area; 511ac. Drainage plate body; 512. Support plate body; 513. Folding plate body; 514. Isolation plate; 52. Drainage slope; 52a. Partition plate; 53. Air expansion plate; 54. Control device; 6. Return air filter; 7. Fresh air filter; 8. Pipe flange; 9. Detailed Implementation

[0035] Where there is no conflict, the embodiments and technical features in the embodiments of this application can be combined with each other. The detailed description in the specific implementation should be understood as an explanation of the purpose of this application and should not be regarded as an undue limitation on this application.

[0036] It should be noted that in the embodiments of this application, "down" refers to the direction where the ground is located, and "up" is the opposite of "down"; the first direction, the second direction, and the third direction form a three-dimensional vertical coordinate system that is perpendicular to each other, and the first side and the second side of the third direction are two opposite orientations. In the embodiments of this application, the orientation or positional relationship of "first direction," "second direction," and "third direction" is based on the orientation or positional relationship shown in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that in the embodiments of this application, "multiple" includes two or more.

[0037] The overall size of the fresh air equipment in the relevant technologies is relatively large and the machine is heavy, which limits the installation space. For example, fresh air equipment is usually only suitable for large houses and / or scenarios with large balcony ceiling space. In addition, the relatively large size of the fresh air equipment in the relevant technologies results in less maintenance space, making it inconvenient to maintain and increasing the difficulty of after-sales maintenance. If the overall size of the fresh air equipment is reduced, the size of the heat exchange core and / or air duct will be reduced, resulting in a decrease in heat exchange efficiency. The drastic change in the air path caused by the reduction in the size of the air duct components leads to performance problems such as large pressure loss, small air volume, high energy consumption, and high noise. In some cases, the overall size of the fresh air equipment in related technologies is large. The plates used to isolate the air ducts in the fresh air equipment are flat. The flat plates are usually perpendicular to the chassis of the outer shell. The plates that isolate the air ducts do not have the function of guiding airflow and will also cause the air duct to include many 90° turns, increasing the useless area inside the shell and causing wasted space. The direction of indoor and outdoor airflow is usually curved. Therefore, eddies will appear at the junctions of various plates and chassis, such as at 90° turns, which will affect the heat exchange efficiency and increase the pressure loss of the entire heat exchange process. The obstructed airflow path will also increase the motor load of the fresh air equipment, thereby increasing the speed and increasing the machine noise and vibration.

[0038] Please see Figure 1 and Figure 2 This application provides a fresh air device, which includes a housing 1, a heat exchange core 2, a fresh air fan 3, and an exhaust fan 4. The heat exchange core 2 is located inside the housing 1 and extends along a first direction. The fresh air fan 3 and the exhaust fan 4 are both located inside the housing 1. The fresh air fan 3 and the exhaust fan 4 are arranged along a second direction and are both located on the same side of the heat exchange core 2 along the first direction, which is perpendicular to the second direction.

[0039] The extension of heat exchange core 2 along the first direction means that airflow enters or exits heat exchange core 2 circumferentially around the first direction. For example, the extension of heat exchange core 2 along the first direction can be achieved by multiple heat exchange medium plates of heat exchange core 2 stacked at intervals along the first direction. The heat exchange medium plates are used for heat exchange between indoor and outdoor airflow. An interval space is formed between two adjacent heat exchange medium plates. Two adjacent interval spaces can respectively allow indoor and outdoor airflow to pass through, and the indoor and outdoor airflows exchange heat through the heat exchange medium plates. That is, indoor and outdoor airflows enter and exit heat exchange core 2 circumferentially around the first direction. The heat exchange medium plates can be used for heat exchange but do not allow airflow.

[0040] Indoor airflow is usually referred to as return air, and outdoor airflow is usually referred to as fresh air. Fresh air fan 3 drives the flow of fresh air, which in turn drives the flow of outdoor air, while exhaust fan 4 drives the flow of return air, which in turn drives the flow of indoor air.

[0041] The fresh air fan 3 drives outdoor airflow through the heat exchange core 2, and the exhaust fan 4 drives indoor airflow through the heat exchange core 2. The indoor and outdoor airflows exchange heat in the heat exchange core 2, achieving heat recovery and regulating the temperature and / or humidity of the outdoor air entering the room. The fresh air system performs both fresh air intake and exhaust functions. The fresh air intake function allows fresh outdoor air to enter the room, while the exhaust function removes stale indoor air from the room.

[0042] In the fresh air equipment provided in this application embodiment, if the fresh air fan 3 and the exhaust fan 4 are located on different sides of the heat exchange core 2 along the first direction, the fresh air fan 3 and the exhaust fan 4 will each occupy the space inside the outer casing 1 along the first direction, causing the size of the outer casing 1 along the first direction to increase. However, if the fresh air fan 3 and the exhaust fan 4 are both located on the same side of the heat exchange core 2 along the first direction, the fresh air fan 3 and the exhaust fan 4 will not increase the size of the outer casing 1 along the first direction, and the structure of the fresh air fan 3, the exhaust fan 4, and the heat exchange core 2 is compact. If the fresh air fan 3 and the exhaust fan 4 are arranged along the second direction, the space of the outer casing 1 along the second direction is fully utilized. By comprehensively considering the space of the outer casing 1 along the first and second directions, the overall size of the fresh air equipment is reduced, meeting the miniaturization requirements.

[0043] The fresh air system provided in this application embodiment can be installed on the ceiling or a suspended ceiling panel. The suspended ceiling panel can divide the indoor space into a ceiling space and a living space. Users conduct daily life in the living space, while the suspended ceiling space is used not only for interior decoration but also for installing other equipment. In one embodiment, the fresh air system is installed within the suspended ceiling space. This way, the fresh air system is hidden within the ceiling space, preventing users from directly observing the entire system and improving visual aesthetics. It is understood that the indoor space includes, but is not limited to, balconies, bathrooms, and kitchens, and can be a large apartment, a small apartment, or other types of production or living environments.

[0044] When the fresh air system provided in this application is installed on a ceiling or suspended ceiling panel, the third direction can be consistent with the vertical direction. The first side of the third direction can be the bottom, and the second side of the third direction can be the top. Taking the outer shell 1 as approximately hexahedral in shape as an example, the third direction can be the thickness direction of the outer shell 1, one of the first and second directions can be the width direction of the outer shell 1, and the other of the first and second directions can be the length direction of the outer shell 1. Taking the fresh air system installed in a suspended ceiling space as an example, the vertical dimension of the suspended ceiling space is much smaller than the vertical dimension of the suspended ceiling space along the first and second directions. The thickness direction of the outer shell 1 is along the vertical direction, which can avoid the problem of the fresh air system being difficult to install in the suspended ceiling space.

[0045] If the heat exchange core extends along a third direction, meaning multiple heat exchange medium plates are stacked along a third direction, it will greatly increase the thickness of the outer casing in the vertical direction, making it difficult to assemble the entire unit into a small installation space in the vertical direction. If the size of the heat exchange core along the third direction is reduced to accommodate the small installation space in the vertical direction, it will result in too few heat exchange medium plates or too small spacing, leading to poor heat exchange performance.

[0046] In this application, the heat exchange core 2 extends along the first direction. In this way, the size of the heat exchange core 2 along the first direction can be large without affecting the thickness of the outer shell 1 along the vertical direction. This allows the thickness of the outer shell 1 along the vertical direction to be designed as needed without affecting the heat exchange efficiency, thus meeting both installation and heat exchange requirements.

[0047] In one embodiment, please refer to Figure 2 and Figure 8 The axis of the fresh air fan 3 and the axis of the exhaust fan 4 both extend along the first direction.

[0048] The larger the radial dimensions of the fresh air fan 3 and the exhaust fan 4, the greater their airflow; conversely, the smaller the radial dimensions of the fresh air fan 3 and the exhaust fan 4, the smaller their airflow. Taking the third direction as an example, if the axes of the fresh air fan 3 and the exhaust fan 4 are along the third direction, that is, if the fresh air fan 3 and the exhaust fan 4 are arranged in a horizontal position on the chassis of the outer casing 1 along the third direction, increasing the radial dimensions of the fresh air fan 3 and the exhaust fan 4 would result in an excessively large overall size. If the radial dimensions of the fresh air fan 3 and the exhaust fan 4 are reduced to reduce the overall size, the airflow of the fresh air fan 3 would be too small. In other words, if the fresh air fan 3 and the exhaust fan 4 are arranged in a horizontal position on the chassis of the outer casing 1 along the third direction, a large radial dimension of the fresh air fan 3 and the exhaust fan 4 would excessively increase the dimension of the outer casing 1 along the first direction, which is not conducive to product miniaturization.

[0049] In this embodiment, the axis of the fresh air fan 3 and the axis of the exhaust fan 4 both extend along the first direction. When the radial dimensions of the fresh air fan 3 and the exhaust fan 4 are large, the fresh air fan 3 and the exhaust fan 4 will not excessively increase the dimensions of the whole machine along the first direction, thereby reducing the volume occupied by the fresh air fan 3 and the exhaust fan 4. The structural layout is more reasonable and the overall size of the machine is smaller.

[0050] It is understandable that the axial and radial directions of the fresh air fan 3 are perpendicular to each other, and the axis of the fresh air fan 3 is a straight line extending along the axial direction. The axial and radial directions of the exhaust fan 4 are perpendicular to each other, and the axis of the exhaust fan 4 is a straight line extending along the axial direction.

[0051] In some embodiments, both the fresh air fan 3 and the exhaust fan 4 are centrifugal fans. For example, a centrifugal fan includes a fan housing and an impeller, with the impeller located inside the fan housing. The impeller rotates to drive airflow, and the fan housing acts as a guide. Both the axis of the impeller and the axis of the fan housing can extend along a first direction. Thus, increasing the radial dimensions of the impeller and the fan housing does not substantially increase the dimension of the outer casing 1 along the first direction.

[0052] In one embodiment, the fan casing is a volute.

[0053] In one embodiment, airflow inlets are formed on both sides of the fan casing along the first direction, and airflow outlets are formed on the circumferential surface of the fan casing surrounding the first direction. Airflow enters the fan casing axially through the two airflow inlets and then flows out through the airflow outlets.

[0054] In one embodiment, please refer to Figure 1 and Figure 2 The outer casing 1 has a return air inlet 1a and a fresh air inlet 1b formed on two opposite sidewalls along the second direction. The heat exchange core 2 has a circumferential surface surrounding the first direction, including a return air inlet surface 2a and a fresh air inlet surface 2b. The return air inlet surface 2a is located on the side of the fresh air inlet surface 2b closest to the return air inlet 1a. Specifically, the fresh air inlet surface 2b is located on the side of the return air inlet surface 2a closest to the fresh air inlet 1b.

[0055] The return air vent 1a is used to introduce indoor airflow into the housing 1. The fresh air vent 1b is used to introduce outdoor airflow into the housing 1.

[0056] Indoor airflow enters heat exchange core 2 through return air inlet surface 2a. Outdoor airflow enters heat exchange core 2 through fresh air inlet surface 2b.

[0057] In this embodiment, indoor airflow from return air inlet 1a enters heat exchange core 2 through return air inlet 2a, and outdoor airflow from fresh air inlet 1b enters heat exchange core 2 through fresh air inlet 2b. Indoor and outdoor airflows enter heat exchange core 2 from opposite sides in the second direction. On the one hand, the return air inlet 1a and return air inlet 2a are opposite each other, and the fresh air inlet 1b and fresh air inlet 2b are opposite each other, which can reduce the 90° turns in the airflow process, making the airflow path smoother, reducing eddies and wind noise, and featuring large air volume, low energy consumption and low noise. On the other hand, it can prolong the heat exchange time of indoor and outdoor airflows in heat exchange core 2 and improve heat exchange efficiency.

[0058] In one embodiment, please refer to Figure 3 The angle between the plane containing the return air inlet surface 2a and the plane containing the return air vent 1a is an acute angle. That is, the return air inlet surface 2a is inclined toward the return air vent 1a. This facilitates the smooth flow of indoor air from the return air vent 1a into the return air inlet surface 2a.

[0059] In one embodiment, please refer to Figure 3 The fresh air intake surface 2b is tilted towards the fresh air inlet 1b. That is, the angle between the plane containing the fresh air intake surface 2b and the plane containing the fresh air inlet 1b is an acute angle. This facilitates the smooth flow of indoor air from the fresh air inlet 1b into the fresh air intake surface 2b.

[0060] In one embodiment, please refer to Figure 1 and Figure 2 The outer casing 1 has a return air inlet 1a and an air supply outlet 1c formed on one side wall along the second direction, and a fresh air inlet 1b and an exhaust outlet 1d formed on the other side wall along the second direction. The air outlet of the fresh air fan 3 is connected to the air supply outlet 1c, and the air outlet of the exhaust fan 4 is connected to the exhaust outlet 1d.

[0061] Air inlet 1c is used to draw outdoor airflow out of housing 1. Air outlet 1d is used to draw indoor airflow out of housing 1.

[0062] For ease of description, the two opposite sidewalls of the outer casing 1 along the second direction are defined as the first sidewall and the second sidewall, respectively. For example, the return air inlet 1a and the supply air inlet 1c can be formed on the first sidewall, and the fresh air inlet 1b and the exhaust air inlet 1d can be formed on the second sidewall. The return air inlet 1a and the fresh air inlet 1b are located on both sides of the heat exchange core 2 along the second direction, and the supply air inlet 1c and the exhaust air inlet 1d are located on both sides of the fresh air fan 3 and the exhaust fan 4 along the second direction.

[0063] In this embodiment, the return air inlet 1a and the fresh air inlet 1b are located on both sides of the heat exchange core 2 along the second direction, and the supply air inlet 1c and the exhaust air inlet 1d are located on both sides of the fresh air fan 3 and the exhaust air fan 4 along the second direction. On the one hand, this facilitates the connection of the return air inlet 1a, the supply air inlet 1c, the fresh air inlet 1b, and the exhaust air inlet 1d to the external air ducts, avoiding interference between the air ducts and the ceiling panels and ceiling, and also avoids the problem of excessively large sizes caused by the formation of the above-mentioned air vents on two or more side walls of the outer casing 1. On the other hand, the smooth flow of indoor and outdoor airflow within the outer casing 1 can reduce eddies.

[0064] In one embodiment, please refer to Figure 1 and Figure 2 The fresh air system includes a control device 6 disposed outside the housing 1, the control device 6 being located on a side wall of the housing 1 along a second direction. For example, the control device 6 may be disposed on a first side wall or a second side wall.

[0065] The control device 6 can be used to control at least one control function such as starting, stopping and selecting mode of the fresh air equipment.

[0066] The return air inlet 1a, supply air inlet 1c, fresh air inlet 1b and exhaust air inlet 1d are equipped with connecting flanges 9. The control device 6 is set on a side wall along the second direction by connecting air ducts to the outside of the connecting flanges 9. In this way, the control device 6 avoids occupying the internal space of the housing 1, and also avoids the control device 6 from having additional dimensions in the first or third direction.

[0067] In one embodiment, please refer to Figure 1 In the second direction, the control device 6 does not protrude from the connecting flange 9 on the same side. Thus, the control device 6 does not increase the overall size of the machine in the second direction.

[0068] In one embodiment, please refer to Figure 1 and Figure 2 In one embodiment, the control device 6 is located between the return air inlet 1a and the supply air inlet 1c. In another embodiment, the control device 6 is located between the fresh air inlet 1b and the exhaust air inlet 1d.

[0069] In one embodiment, please refer to Figure 3 The heat exchange core 2 has a circumferential surface surrounding the first direction, including a return air inlet surface 2a, a fresh air inlet surface 2b, an exhaust air outlet surface 2d, and a supply air outlet surface 2c. The exhaust air outlet surface 2d is opposite to the return air inlet surface 2a, and the supply air outlet surface 2c is opposite to the fresh air inlet surface 2b. The return air inlet surface 2a, the fresh air inlet surface 2b, the exhaust air outlet surface 2d, and the supply air outlet surface 2c are connected in sequence.

[0070] Before heat exchange, the outdoor airflow enters the heat exchange core 2 through the fresh air inlet 2b, and after heat exchange, the outdoor airflow exits the heat exchange core 2 through the air outlet 2c.

[0071] Before heat exchange, the indoor airflow enters the heat exchange core 2 through the return air inlet surface 2a, and after heat exchange, the indoor airflow flows out of the heat exchange core 2 through the exhaust air outlet surface 2d.

[0072] The return air inlet surface 2a, the fresh air inlet surface 2b, the exhaust air outlet surface 2d, and the supply air outlet surface 2c are connected sequentially. In a plane projection perpendicular to the first direction, the projection formed by the return air inlet surface 2a, the fresh air inlet surface 2b, the exhaust air outlet surface 2d, and the supply air outlet surface 2c is quadrilateral. That is, with the plane perpendicular to the first direction as the cross-section, the cross-section of the heat exchange core 2 is quadrilateral, for example, it can be a regular quadrilateral. Compared with heat exchange cores with a hexagonal or larger cross-section, the cross-sectional area of ​​the heat exchange core 2 of this application is smaller, and the dimensions of the heat exchange core 2 in the second and third directions are smaller.

[0073] The exhaust air outlet 2d is opposite to the return air inlet 2a, and the supply air outlet 2c is opposite to the fresh air inlet 2b. In this way, the indoor airflow and the outdoor airflow flow cross-flow, which can improve the heat exchange efficiency. Under the condition that the cross-sectional size of the heat exchange core 2 is small, the heat exchange performance can be maintained by utilizing the size of the heat exchange core 2 along the first direction.

[0074] In one embodiment, please refer to Figure 3 The outer casing 1 has an inner surface along a third direction as a bearing surface 1e, and an exhaust outlet surface 2d faces the bearing surface 1e. The angle between the exhaust outlet surface 2d and the bearing surface 1e is α, where 15°≤α≤30°. The first direction, the second direction, and the third direction are perpendicular to each other. For example, α can be 15°, 17°, 18°, 20°, 23°, 25°, or 30°, etc.

[0075] The bearing surface 1e can be the inner surface of the chassis of the housing 1. The chassis can be located on the second side of the housing 1 along a third direction.

[0076] In this embodiment, the angle α between the exhaust outlet surface 2d and the bearing surface 1e is between 15° and 30°. On the one hand, it takes into account the smoothness of airflow in all four directions and the effective heat exchange area of ​​the heat exchange core 2. The volume of the heat exchange core 2 is smaller than that of the heat exchange core of the fresh air equipment in related technologies, but the heat exchange efficiency is higher. On the other hand, considering that the fresh air filter 8 in the fresh air path includes a high-efficiency filter with a large pressure loss and a large load on the fresh air motor, the air supply channel 102a is relatively wide while the exhaust channel 104a is relatively narrow. In this way, the load of the fresh air motor and the exhaust motor is relatively balanced, improving the overall power and motor life.

[0077] Understandably, the fresh air motor is used to drive the impeller of the fresh air fan 3. The exhaust fan motor is used to drive the impeller of the exhaust fan 4.

[0078] As an example, the heat exchange core 2 extends along a first direction, with a plane perpendicular to the first direction as its cross-section. The cross-sectional shape of the heat exchange core 2 is a regular quadrilateral. The heat exchange core 2 includes multiple heat exchange medium plates stacked along the first direction. The dimension of the heat exchange medium plates along the first direction is 1.3 mm. The angle α between the exhaust outlet surface 2d and the bearing surface 1e is between 15° and 30°. Compared with the related technologies where heat exchange medium plates are stacked along a third direction, the number of heat exchange medium plates in the technical solution of this application can be increased by about 81%. The volume of the fresh air equipment in this application is reduced by about 51% compared with the models in the related technologies, but the heat exchange efficiency is higher, achieving unit volume efficiency optimization and achieving the same enthalpy exchange efficiency as larger models within a limited volume.

[0079] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 5The fresh air system includes a partition 5, which divides the space inside the outer casing 1 into a heat exchange chamber 10a and a fan chamber 10b. The fan chamber 10b is located on one side of the heat exchange chamber 10a along a first direction. The heat exchange core 2 is located inside the heat exchange chamber 10a, and both the fresh air fan 3 and the exhaust fan 4 are located inside the fan chamber 10b. The partition 5 divides the space inside the outer casing 1, limiting the direction of airflow within the outer casing 1. The fan chamber 10b and the heat exchange core 2 are roughly T-shaped, which makes the airflow inside the outer casing 1 smoother, achieving the effects of large air volume, low energy consumption, and quiet operation.

[0080] The materials of the separator 5 include, but are not limited to, plastics. Sheet metal parts are difficult to make curved surfaces and difficult to design according to airflow direction, resulting in design limitations. Insulation foam parts are usually very thick and take up a lot of space. Compared with sheet metal parts and insulation foam parts, plastic parts have the advantages of flexible curved surface design for airflow direction, and their relatively smaller thickness does not take up too much space.

[0081] In some embodiments, the separator 5 can be a one-piece molded structure. For example, the separator 5 can be a one-piece injection molded structure. This reduces assembly steps.

[0082] In some embodiments, the separator 5 may also be a modular structure. That is, the separator 5 may be composed of multiple individually manufactured components.

[0083] In some embodiments, the two end faces of the heat exchange core 2 along the first direction may abut against the housing 1 or the partition 5. For example, one end face of the heat exchange core 2 along the first direction abuts against the housing 1, and the other end face of the heat exchange core 2 along the first direction abuts against the partition 5. As another example, both end faces of the heat exchange core 2 along the first direction abut against the housing 1. For yet another example, please refer to... Figure 2 and Figure 4 Both end faces of the heat exchange core 2 along the first direction abut against the partition 5. This prevents airflow from passing through the gap between the two end faces of the heat exchange core 2 along the first direction and the outer casing 1 or the partition 5.

[0084] In one embodiment, please refer to Figure 2 and Figure 3 The separator 5 includes a separator plate 51, which connects the heat exchange core 2 and the return air inlet 1a to separate the heat exchange chamber 10a into a return air channel 101a and a supply air channel 102a. The return air channel 101a is located on the first side of the supply air channel 102a along the third direction, and the return air inlet surface 2a is part of the surface of the return air channel 101a. The first direction, the second direction and the third direction are perpendicular to each other.

[0085] The two surfaces of the partition plate 51 in the thickness direction can be a portion of the return air duct 101a and a portion of the supply air duct 102a, respectively. The return air duct 101a is used to transport indoor airflow to the heat exchange core 2; that is, the return air duct 101a is used to transport indoor airflow before heat exchange. The supply air duct 102a is used to transport outdoor airflow from the heat exchange core 2; that is, the supply air duct 102a is used to transport outdoor airflow after heat exchange. The return air duct 101a and the supply air duct 102a are independent of each other; that is, indoor airflow in the return air duct 101a does not enter the supply air duct 102a, and outdoor airflow in the supply air duct 102a does not enter the return air duct 101a; there is no gas flow between the return air duct 101a and the supply air duct 102a.

[0086] In this embodiment, the partition plate 51 divides part of the space within the heat exchange chamber 10a into independent return air channels 101a and supply air channels 102a, resulting in a simple structure. Indoor airflow from the indoor environment enters the return air channel 101a through the return air inlet 1a, while outdoor airflow is discharged through the supply air channel 102a. The return air channel 101a and supply air channel 102a are distributed along a third direction. The length directions of the return air channel 101a, supply air channel 102a, and heat exchange core 2 can all be along a first direction. The sum of the dimensions of the return air channel 101a and supply air channel 102a in the third direction can be approximately equal to the dimension of the fan cavity 10b in the third direction. The return air channel 101a, supply air channel 102a, and fan cavity 10b are arranged in two directions respectively. In this way, without increasing the overall size of the outer shell 1 or with a relatively small overall size of the outer shell 1, the volume of the return air channel 101a, supply air channel 102a, and fan cavity 10b can be relatively large, and the resistance on the airflow path can be relatively small. The indoor airflow enters the return air duct 101a along the second direction. The indoor airflow flows along the surface of the partition plate 51 toward the return air inlet surface 2a. The partition plate 51 acts as a guide, so that the indoor airflow from the return air inlet 1a can enter the return air duct 101a without making a large angle, such as a 90° turn, thereby reducing the resistance during the indoor airflow process and reducing noise.

[0087] The partition plate 51 can connect to the return air vent 1a at a location surrounding the return air vent 1a. For example, the partition plate 51 can connect to the side wall where the return air vent 1a is located, such as the first side wall. Alternatively, the partition plate 51 can connect to the connection between the first side wall and the chassis. Yet another example is that the partition plate 51 can connect to a portion of the chassis near the first side wall.

[0088] In one embodiment, please refer to Figure 2 and Figure 3The heat exchange core 2, surrounding the circumferential surface in the first direction, includes an air supply outlet surface 2c, which faces away from the fresh air inlet surface 2b. The air supply outlet surface 2c is part of the surface of the air supply duct 102a. After heat exchange, the outdoor airflow directly enters the air supply duct 102a through the air supply outlet surface 2c. Because the air supply outlet surface 2c faces away from the fresh air inlet surface 2b, the outdoor airflow generally flows from the first side in the third direction to the second side, resulting in smooth airflow and low resistance.

[0089] In one embodiment, please refer to Figure 2 , Figure 3 and Figure 8 The fan chamber 10b includes an air supply chamber 101b located on one side of the air supply duct 102a along a first direction. The fresh air fan 3 is located inside the air supply chamber 101b, which is connected to the air supply duct 102a. Specifically, the outlet of the air supply duct 102a near the air supply chamber 101b along the first direction is connected to the air supply chamber 101b. Outdoor airflow flows approximately along the first direction within the air supply duct 102a and enters the air supply chamber 101b. In this way, the outdoor airflow does not need to make a 90° turn, resulting in smooth airflow, low wind resistance, and minimal losses.

[0090] For ease of description, the fan housing of the fresh air fan 3 is defined as the fresh air fan housing. In one embodiment, please refer to... Figure 2 , Figure 3 and Figure 8 One airflow inlet of the fresh air unit casing faces the outlet of the air supply duct 102a, and the airflow outlet of the fresh air unit casing is connected to the air supply outlet 1c. Airflow within the air supply chamber 101b enters the fresh air unit casing through the two airflow inlets and then flows out to the air supply outlet 1c through the airflow outlet. The length of the air supply duct 102a extends along a first direction, and the airflow within the air supply duct 102a converges along the first direction into the air supply chamber 101b, and then enters the fresh air unit casing along the first direction. This reduces large-angle turns (e.g., 90°) during outdoor airflow, thereby reducing wind resistance, eddies, and noise.

[0091] In one embodiment, the airflow outlet of the fresh air unit casing is aligned and connected to the air supply outlet 1c. That is, the airflow outlet of the fresh air unit casing and the air supply outlet 1c are similar in size and shape. Taking a plane perpendicular to the second direction as the projection plane, the projection of the airflow outlet of the fresh air unit casing and the projection of the air supply outlet 1c at least partially overlap.

[0092] In one embodiment, please refer to Figures 3 to 7 The partition plate 51 includes a guide plate body 511. The surface of the guide plate body 511 facing the return air inlet 1a is a return air guide surface 511a. The return air guide surface 511a includes a recessed area 511aa that is recessed in the direction away from the return air inlet 1a. With a plane perpendicular to the second direction as the projection plane, the projection of the return air inlet 1a is located within the projection range of the recessed area 511aa.

[0093] In this embodiment, the return air guide surface 511a is a portion of the surface of the return air duct 101a. The indoor airflow at the return air inlet 1a is relatively large. Taking a plane perpendicular to the second direction as the projection surface, the projection of the return air inlet 1a is located within the projection range of the recessed region 511aa. By increasing the space of the return air duct 101a corresponding to the return air inlet 1a through the recessed region 511aa, the wind speed of the indoor airflow is reduced, thereby reducing the frictional noise between the indoor airflow and the return air guide surface 511a.

[0094] In some embodiments, a portion of the guide plate 511 can be bent away from the first sidewall to form a recessed region 511aa. That is, the portion of the guide plate 511 corresponding to the recessed region 511aa occupies space in the air supply channel 102a. This eliminates the need to thin the portion of the guide plate 511 corresponding to the recessed region 511aa, resulting in better structural strength of the guide plate 511. The outdoor airflow volume at the portion of the air supply channel 102a corresponding to the recessed region 511aa is smaller, requiring less air supply space. The portion of the guide plate 511 corresponding to the recessed region 511aa occupies space in the air supply channel 102a without increasing the resistance of the air supply channel 102a; it also achieves a balance between the return air channel 101a and the air supply channel 102a.

[0095] In one embodiment, please refer to Figure 7 The recessed area 511aa has an arc surface. For example, the recessed area 511aa can be an arc surface. By guiding the airflow with an arc surface, the probability of vortex formation in the indoor airflow is reduced, further reducing the noise generated by the indoor airflow colliding with the guide plate 511.

[0096] In one embodiment, please refer to Figures 3 to 7 The return air guide surface 511a includes a protruding region 511ab that protrudes towards the first sidewall. The protruding region 511ab is located on the side of the recessed region 511aa that is close to the supply air chamber 101b along the first direction. That is to say, the cross-sectional area of ​​the return air duct 101a corresponding to the protruding region 511ab is relatively small. The indoor airflow from the return air vent 1a is diverted towards the supply air chamber 101b. The airflow at the position of the return air duct 101a away from the recessed region 511aa is relatively small. The relatively small cross-sectional area of ​​the return air duct 101a corresponding to the protruding region 511ab will not excessively increase the wind speed, nor will it excessively increase the frictional noise between the indoor airflow and the guide plate 511.

[0097] In some embodiments, the concave region 511aa and the convex region 511ab transition smoothly. That is, the return air guide surface 511a is streamlined, allowing indoor airflow to conform to the return air guide surface 511a and flow towards the return air inlet surface 2a in a third direction. This guides and directs indoor airflow, reducing eddies caused by vertical surfaces in related technologies, avoiding wind resistance due to corners, significantly reducing noise, and correspondingly reducing pressure loss throughout the heat exchange process. Therefore, it can improve heat exchange efficiency and reduce resistance and energy consumption.

[0098] In one embodiment, please refer to Figures 3 to 7 The partition 5 includes a partition plate 53, the surface of which is part of the surface of the air supply chamber 101b. One end of the partition plate 53 is connected to the partition plate 51 along a third direction, and a portion of the partition plate 53 protrudes towards the partition plate 51. Outdoor airflow is concentrated in the air supply chamber 101b and then delivered to the indoor environment, maximizing the airflow in the air supply chamber 101b. The partition plate 53 is located at the junction of the air supply channel 102a and the air supply chamber 101b. The protrusion of the partition plate 53 towards the partition plate 51 not only expands the volume of the air supply chamber 101b, thereby increasing the space of the air supply chamber 101b and reducing the wind speed inside the air supply chamber 101b, but also reduces local eddies and stagnant airflow areas, improves gas turbulence, and achieves the effect of reducing noise.

[0099] In one embodiment, a portion of the partition plate 53 protrudes towards the partition plate 51 to form an air guide section, and the surface of the air guide section constituting the air supply chamber 101b can be an flared curved surface. The airflow from the air supply channel 102a can flow smoothly along the flared curved surface of the air guide section towards the first side in a third direction. At the same time, the flared curved surface guides the originally blocked airflow to the fresh air fan 3, reducing dead air angles and eddies.

[0100] In one embodiment, please refer to Figures 3 to 7 The fresh air system includes a return air filter 7 located within the return air duct 101a, between the return air inlet 1a and the guide plate 511. Indoor airflow from the return air inlet 1a is filtered by the return air filter 7 and then guided by the guide plate 511 to the heat exchange core 2. The return air filter 7 filters the airflow, improving its cleanliness, keeping the heat exchange core 2 clean, and extending its service life.

[0101] The return air filter 7 can be used to filter airflow and improve its cleanliness. The functions of the return air filter 7 include, but are not limited to, removing dust, microorganisms and / or harmful gases from the air.

[0102] For example, the return air filter 7 can filter impurities such as dust, lint, or paper scraps carried by indoor airflow. The particle size of these impurities is not limited; for example, the particle size of the impurities includes, but is not limited to, PM1.0, PM2.5, PM10, and other particle sizes. The return air filter 7 may include, but is not limited to, a pre-filter. Pre-filters are mainly used to filter impurities larger than 5 μm (micrometers).

[0103] In some embodiments, the return air filter 7 can be fixed to the partition 5. Thus, the partition 5 can not only be used to define the flow channel, but also to fix the return air filter 7.

[0104] For example, in some embodiments, the return air duct 101a may form a guide groove on the side wall along the first direction, and a buckle may be configured in the guide groove. The end of the return air filter 7 along the first direction is located in the guide groove and is engaged with the buckle.

[0105] In one embodiment, please refer to Figures 3 to 7 The partition plate 51 includes a diversion plate 512 and a support plate 513. The support plate 513 connects the diversion plate 512 and the guide plate 511. One end of the diversion plate 512 is connected to the second side of the return air vent 1a in a third direction, and the other end of the diversion plate 512 extends obliquely away from the return air vent 1a. The return air filter 7 is disposed on the support plate 513. The angle between the diversion plate 512 and the return air filter 7 is obtuse. The diversion plate 512 is inclined towards the return air vent 1a. The indoor airflow from the return air vent 1a flows through the guide plate to the first side in a third direction and then to the return air filter 7, reducing airflow obstruction and lowering the probability of eddies.

[0106] In one embodiment, please refer to Figures 3 to 7 The return air guide surface 511a includes a transition region 511ac, which connects to the side of the protruding region 511ab along the second direction near the return air filter 7. The transition region 511ac can abut against the return air filter 7. For example, the transition region 511ac can abut against one end face of the return air filter 7 along the second direction. After the indoor airflow from the return air inlet 1a is filtered by the return air filter 7, it is guided by the return air guide surface 511a. Some of the indoor airflow diffuses towards the protruding region 511ab. The transition region 511ac abutting against the return air filter 7 can prevent some airflow from entering the narrow gap and forming vortices, reducing airflow obstruction.

[0107] In one embodiment, please refer to Figures 3 to 7 The partition plate 51 includes a folding plate body 514, which connects the guide plate body 511 and the heat exchange core 2. The folding plate body 514 is perpendicular to a third direction. For example, the folding plate body 514 can be smoothly connected to the guide plate body 511. The folding plate body 514 facilitates the flow of indoor airflow to the return air inlet surface 2a.

[0108] In one embodiment, please refer to Figures 3 to 7 The separator 5 includes a partition plate 52, which connects the heat exchange core 2 and the fresh air inlet 1b to separate the heat exchange chamber 10a into a fresh air channel 103a and an exhaust channel 104a. The fresh air channel 103a is located on the first side of the exhaust channel 104a along the third direction, and the fresh air inlet surface 2b is part of the surface of the fresh air channel 103a. The first direction, the second direction and the third direction are perpendicular to each other.

[0109] The two surfaces of the isolation plate 52 in the thickness direction can be a portion of the surface of the fresh air duct 103a and a portion of the surface of the exhaust air duct 104a, respectively. The fresh air duct 103a is used to transport outdoor airflow to the heat exchange core 2, that is, the fresh air duct 103a is used to transport outdoor airflow before heat exchange. The exhaust air duct 104a is used to transport indoor airflow from the heat exchange core 2, that is, the exhaust air duct 104a is used to transport indoor airflow after heat exchange.

[0110] The fresh air duct 103a and the exhaust duct 104a are independent of each other. That is to say, the outdoor airflow in the fresh air duct 103a does not enter the exhaust duct 104a, and the indoor airflow in the exhaust duct 104a does not enter the fresh air duct 103a. There is no airflow between the fresh air duct 103a and the exhaust duct 104a.

[0111] In this embodiment, the partition plate 52 divides part of the space within the heat exchange chamber 10a into independent fresh air duct 103a and exhaust air duct 104a, resulting in a simple structure. Outdoor airflow from the outdoor environment enters the fresh air duct 103a through the fresh air inlet 1b, while indoor airflow is discharged through the exhaust air duct 104a. The fresh air duct 103a and exhaust air duct 104a are distributed along a third direction. The length directions of the fresh air duct 103a, exhaust air duct 104a, and heat exchange core 2 can all be along a first direction. The sum of the dimensions of the fresh air duct 103a and exhaust air duct 104a in the third direction can be approximately equal to the dimension of the fan chamber 10b in the third direction. With the fresh air duct 103a, exhaust air duct 104a, and fan chamber 10b arranged in two directions, the volume of the fresh air duct 103a, exhaust air duct 104a, and fan chamber 10b can be relatively large without increasing the overall size of the outer shell 1 or with a relatively small overall size of the outer shell 1, while the resistance on the airflow path can be relatively small. Outdoor airflow enters the fresh air duct 103a along the second direction. The outdoor airflow flows along the surface of the isolation plate 52 toward the fresh air inlet 2b. The isolation plate 52 acts as a guide, allowing the outdoor airflow from the fresh air inlet 1b to enter the fresh air duct 103a without making a large turn, such as 90°, thereby reducing the resistance during the flow of outdoor air and reducing noise.

[0112] The connection point between the isolation plate 52 and the fresh air inlet 1b can be the surrounding area of ​​the fresh air inlet 1b. For example, the isolation plate 52 can be connected to the side wall where the fresh air inlet 1b is located, such as the second side wall. Another example is the connection between the isolation plate 52 and the chassis. Yet another example is the connection between the isolation plate 52 and the chassis near the second side wall.

[0113] In one embodiment, please refer to Figures 3 to 7 The heat exchange core 2, surrounding the circumferential surface in the first direction, includes an exhaust outlet surface 2d, which faces away from the return air inlet surface 2a. The exhaust outlet surface 2d is part of the surface of the exhaust duct 104a. After heat exchange, the indoor airflow directly enters the exhaust duct 104a through the exhaust outlet surface 2d. Since the exhaust outlet surface 2d faces away from the return air inlet surface 2a, the indoor airflow generally flows from the first side in the third direction to the second side, resulting in smooth airflow and low resistance.

[0114] In one embodiment, please refer to Figures 2 to 4 The fan chamber 10b includes an exhaust chamber 102b located on one side of the exhaust duct 104a along a first direction. The exhaust fan 4 is located inside the exhaust chamber 102b, which is connected to the exhaust duct 104a. Specifically, the outlet of the exhaust duct 104a near the exhaust chamber 102b along the first direction is connected to the exhaust chamber 102b. The indoor airflow flows approximately along the first direction within the exhaust duct 104a and enters the exhaust chamber 102b. In this way, the indoor airflow does not need to make a 90° turn, resulting in smooth airflow, low air resistance, and minimal losses.

[0115] It should be noted that the exhaust chamber 102b and the supply chamber 101b can be independent of each other. That is to say, the indoor airflow in the exhaust chamber 102b does not enter the supply chamber 101b, the outdoor airflow in the supply chamber 101b does not enter the exhaust chamber 102b, and there is no gas flow between the exhaust chamber 102b and the supply chamber 101b.

[0116] For ease of description, the fan casing of the exhaust fan 4 is defined as the exhaust fan casing. In one embodiment, one airflow inlet of the exhaust fan casing faces the outlet of the exhaust channel 104a, and the airflow outlet of the exhaust fan casing is connected to the exhaust port 1d. The airflow in the exhaust chamber 102b enters the exhaust fan casing through the two airflow inlets and then flows out to the exhaust port 1d through the airflow outlet. The exhaust channel 104a extends along a first direction, and the airflow in the exhaust channel 104a converges into the exhaust chamber 102b along the first direction and then enters the exhaust fan casing along the first direction. This reduces large-angle turns, such as 90°, during the outdoor airflow, thereby reducing wind resistance, reducing eddies, and reducing noise.

[0117] In one embodiment, the airflow outlet of the exhaust fan casing is aligned and connected to the exhaust port 1d. That is, the airflow outlet of the exhaust fan casing and the exhaust port 1d are similar in size and shape. Taking a plane perpendicular to the second direction as the projection plane, the projection of the airflow outlet of the exhaust fan casing and the projection of the exhaust port 1d at least partially overlap.

[0118] In one embodiment, please refer to Figures 3 to 7 The partition 5 includes an air diffuser 54, the surface of which is part of the surface of the exhaust chamber 102b. One end of the air diffuser 54 is connected to the partition plate 52 in a third direction, and the other end of the air diffuser 54 extends obliquely away from the partition plate 52 in the third direction. The surface of the air diffuser 54 constituting the exhaust chamber 102b can be an inclined plane. The airflow from the exhaust duct 104a can flow smoothly along the inclined plane of the air diffuser 54 towards the first side in the third direction, reducing dead air angles and eddies. The indoor airflow is concentrated in the exhaust chamber 102b and sent to the outdoor environment. The airflow in the exhaust chamber 102b reaches its maximum. The air diffuser 54 can expand the volume of the exhaust chamber 102b, thereby increasing the space of the exhaust chamber 102b, reducing the wind speed in the exhaust chamber 102b, and achieving the effect of reducing noise.

[0119] In some embodiments, the separator 5 may further include a connecting plate and a sealing plate spaced apart along a first direction, the connecting plate connecting the partition plate 53 and the air expansion plate 54, and the sealing plate connecting the partition plate 51 and the isolation plate 52.

[0120] In one embodiment, please refer to Figures 3 to 7 The fresh air system includes a fresh air filter 8 located within the fresh air duct 103a. The isolation plate 52 includes a guide slope 52a located between the fresh air filter 8 and the fresh air inlet 1b, inclined towards the fresh air inlet 1b. That is, the angle between the guide slope 52a and the plane containing the fresh air inlet 1b is acute. Outdoor airflow from the fresh air inlet 1b flows towards the fresh air filter 8 under the guidance of the guide slope 52a, preventing obstruction and eddy currents near the fresh air inlet 1b.

[0121] In some embodiments, the fresh air filter 8 can be fixed to the partition 5. Thus, the partition 5 can not only be used to define the airflow path, but also to fix the fresh air filter 8.

[0122] For example, in some embodiments, the sidewall of the fresh air duct 103a along the first direction may form a guide groove, and a buckle may be configured in the guide groove. The end of the fresh air filter 8 along the first direction is located in the guide groove and is engaged with the buckle.

[0123] Fresh air filter 8 can be used to filter airflow and improve its cleanliness. The functions of fresh air filter 8 include, but are not limited to, removing dust, microorganisms and / or harmful gases from the air.

[0124] The fresh air filter 8 may include a pre-filter.

[0125] The fresh air filter 8 may include a high-efficiency filter. High-efficiency filters can adsorb PM2.5 and / or remove odors. High-efficiency filters include, but are not limited to, HEPA (High Efficiency Particulate Air Filter) and / or HAF (High Air Flow) filters.

[0126] In one embodiment, please refer to Figures 2 to 8 The heat exchange core 2 extends along a first direction. The air supply chamber 101b and the exhaust chamber 102b are located on the same side of the heat exchange core 2 along the first direction. The outer shell 1 forms a return air inlet 1a and an air supply inlet 1c on the first side wall along the second direction. The outer shell 1 forms a fresh air inlet 1b and an exhaust air inlet 1d on the second side wall along the second direction. The return air channel 101a is located on the first side of the air supply channel 102a along the third direction. The fresh air channel 103a is located on the first side of the exhaust channel 104a along the third direction. The air supply chamber 101b is located on one side of the air supply channel 102a along the first direction. The exhaust chamber 102b is located on one side of the exhaust channel 104a along the first direction.

[0127] The return air duct 101a and the supply air duct 102a are both located on the same side of the heat exchange core 2 along the second direction. The fresh air duct 103a and the exhaust air duct 104a are both located on the same side of the heat exchange core 2 along the second direction. Thus, the sum of the dimensions of the supply air chamber 101b and the exhaust air chamber 102b along the second direction can be approximately equal to the sum of the dimensions of the return air duct 101a, the fresh air duct 103a, and the heat exchange core 2 along the second direction. The dimensions of the supply air chamber 101b, the exhaust air chamber 102b, and the heat exchange core 2 along the third direction can be approximately the same. Other air ducts can also be designed according to the above principle. In this way, there are almost no useless areas within the outer casing 1, and the dimensions of each air duct within the outer casing 1 are relatively large.

[0128] Regarding indoor airflow: Indoor airflow enters the outer casing 1 from the return air inlet 1a and flows along the first airflow path X1 within the outer casing 1, then is discharged to the outside from the exhaust outlet 1d. In other words, the first airflow path is the return air path for indoor airflow. Specifically: After entering the return air channel 101a, the indoor airflow from the return air inlet 1a flows in a curved direction to the first side, and then enters the heat exchange core 2 through the return air inlet surface 2a and flows to the second side. After heat exchange, the indoor airflow enters the exhaust channel 104a through the exhaust outlet surface 2d, and finally enters the exhaust chamber 102b and is discharged through the exhaust outlet 1d. The indoor airflow flows linearly with almost no dead zones, ensuring smooth airflow and low wind resistance.

[0129] Regarding outdoor airflow: Outdoor airflow enters the outer casing 1 through the fresh air inlet 1b and flows along the second airflow path X2 within the outer casing 1. Then, it is discharged into the room through the air outlet 1c. In other words, the second airflow path is the fresh air path for outdoor airflow. Specifically: After entering the fresh air duct 103a, the outdoor airflow from the fresh air inlet 1b flows in a curved direction to the first side, passes through the fresh air inlet surface 2b, enters the heat exchange core 2, and flows to the second side. After heat exchange, the outdoor airflow enters the air supply duct 102a through the air supply outlet surface 2c, and finally enters the air supply chamber 101b and is discharged through the air outlet 1c. The outdoor airflow flows linearly with almost no dead zones, ensuring smooth airflow and low wind resistance.

[0130] In some embodiments, the dimensions of the fresh air unit along the first direction can be 510mm to 530mm, the dimensions along the second direction can be 580mm to 695mm, and the dimensions along the third direction can be 230mm to 240mm. The heat exchange core 2 extends along the first direction, and the fresh air fan 3 and the exhaust fan 4 are arranged along the second direction, both located on the same side of the heat exchange core 2 along the first direction. The air volume of the fresh air unit provided in this embodiment can be between 250 and 350. Thus, by simplifying the structure and reducing the number of components, the space utilization rate is improved. While ensuring performance such as air volume, efficiency, and power, the volume is reduced by approximately 50% to 60% compared to existing models with similar performance.

[0131] In the description of this application, the use of terms such as "in one embodiment," "in some embodiments," or "exemplary" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0132] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A fresh air device, characterized in that, include: shell; A heat exchange core is located inside the housing and extends along a first direction; The fresh air fan is located inside the housing; An exhaust fan is located inside the housing. The fresh air fan and the exhaust fan are arranged along the second direction and are both located on the same side of the heat exchange core along the first direction. The first direction and the second direction are perpendicular to each other.

2. The fresh air equipment according to claim 1, characterized in that, The outer casing has a return air inlet and a fresh air inlet formed on two opposite sidewalls along the second direction. The circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface and a fresh air inlet surface. The return air inlet surface is located on the side of the fresh air inlet surface closer to the return air inlet.

3. The fresh air equipment according to claim 2, characterized in that, The fresh air intake surface is tilted towards the fresh air inlet.

4. The fresh air equipment according to claim 2, characterized in that, The fresh air device includes a partition that defines the space inside the housing as a heat exchange chamber and a fan chamber. The fan chamber is located on one side of the heat exchange chamber along a first direction. The heat exchange core is located inside the heat exchange chamber. The fresh air fan and the exhaust fan are both located inside the fan chamber.

5. The fresh air equipment according to claim 4, characterized in that, The separator includes a partition plate that connects the heat exchange core and the return air inlet to separate the heat exchange chamber into a return air channel and a supply air channel. The return air channel is located on the first side of the supply air channel along a third direction. The return air inlet surface is a portion of the surface of the return air channel. The first direction, the second direction, and the third direction are perpendicular to each other.

6. The fresh air equipment according to claim 5, characterized in that, The circumferential surface of the heat exchange core surrounding the first direction includes an air supply outlet surface, which is opposite to the fresh air inlet surface, and the air supply outlet surface is a portion of the surface of the air supply channel.

7. The fresh air equipment according to claim 5, characterized in that, The fan cavity includes an air supply chamber located on one side of the air supply channel along a first direction, the fresh air fan is located in the air supply chamber, and the air supply chamber is connected to the air supply channel.

8. The fresh air equipment according to claim 4, characterized in that, The separator includes an isolation plate that connects the heat exchange core and the fresh air inlet to separate the heat exchange chamber into a fresh air channel and an exhaust air channel. The fresh air channel is located on the first side of the exhaust air channel along a third direction, and the fresh air inlet surface is a portion of the surface of the fresh air channel. The first direction, the second direction, and the third direction are perpendicular to each other.

9. The fresh air equipment according to claim 8, characterized in that, The circumferential surface of the heat exchange core surrounding the first direction includes an exhaust air outlet surface, which is opposite to the return air inlet surface, and the exhaust air outlet surface is a portion of the surface of the exhaust channel.

10. The fresh air equipment according to claim 8, characterized in that, The fan chamber includes an exhaust chamber located on one side of the exhaust duct along a first direction, the exhaust fan is located in the exhaust chamber, and the exhaust chamber is connected to the exhaust duct.

11. The fresh air equipment according to claim 1, characterized in that, The outer casing has a return air inlet and an air supply inlet on one side wall along the second direction, and a fresh air inlet and an exhaust air inlet on the other side wall along the second direction. The airflow outlet of the fresh air fan is connected to the air supply inlet, and the airflow outlet of the exhaust fan is connected to the exhaust air inlet.

12. The fresh air equipment according to claim 11, characterized in that, The fresh air equipment includes a control device disposed outside the housing, the control device being located on a side wall of the housing along a second direction.

13. The fresh air equipment according to claim 1, characterized in that, The circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface, a fresh air inlet surface, an exhaust air outlet surface, and a supply air outlet surface. The exhaust air outlet surface is opposite to the return air inlet surface, and the supply air outlet surface is opposite to the fresh air inlet surface. The return air inlet surface, the fresh air inlet surface, the exhaust air outlet surface, and the supply air outlet surface are connected in sequence.

14. The fresh air equipment according to claim 13, characterized in that, The outer casing has an inner surface along a third direction as a bearing surface, the exhaust outlet surface faces the bearing surface, and the angle between the exhaust outlet surface and the bearing surface is α, 15°≤α≤30°, wherein the first direction, the second direction and the third direction are perpendicular to each other.

15. The fresh air device according to any one of claims 1 to 14, characterized in that, The axis of the fresh air fan and the axis of the exhaust fan both extend along the first direction.

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