Fresh air equipment

Abstract

The utility model relates to the technical field of air conditioning, and provides fresh air equipment which comprises a shell, a heat exchange core and a partition part, the partition part limits part of space in the shell into a heat exchange cavity, the heat exchange core is located in the heat exchange cavity, the partition part comprises a partition plate, and the partition plate is connected with the heat exchange core and the shell; the heat exchange cavity is divided into an air return channel and an air supply channel. The partition plate divides the heat exchange cavity into the air return channel and the air supply channel which are independent of each other, airflow in the air return channel and airflow in the air supply channel do not circulate mutually, the probability that outdoor airflow and indoor airflow are mixed is reduced, the heat exchange effect is improved, the air return channel and the air supply channel are separated through the partition plate, the structure is simple, and cost is low. The overall weight of the fresh air equipment can be reduced to a certain extent by simplifying the partition plate for limiting the air duct.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a fresh air device. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] Fresh air equipment can be used to transport outdoor air into the room and discharge indoor air to the outside. In the related art, a heat exchange core is arranged in the shell of the fresh air equipment, and the outdoor airflow and the indoor airflow exchange heat in the heat exchange core, so as to achieve the purpose of introducing fresh air into the room and discharging indoor stale air. There are outdoor airflow and indoor airflow in the shell, and it is necessary to simplify the structure inside the shell to reduce the overall weight of the fresh air equipment, and it is also necessary to limit the air ducts of the outdoor airflow and the indoor airflow in the shell to improve the heat exchange effect. Utility Model Content

[0004] In view of this, the present application hopes to provide a fresh air device, which separates the return air channel and the supply air channel by a partition plate and has a simple structure.

[0005] The embodiment of the present application provides a fresh air device, including:

[0006] shell;

[0007] Heat exchange core;

[0008] A partition, wherein the partition defines a portion of the space within the shell as a heat exchange chamber, wherein the heat exchange core is located within the heat exchange chamber, and wherein the partition comprises a partition plate, wherein the partition plate connects the heat exchange core and the shell to separate the heat exchange chamber into a return air channel and a supply air channel.

[0009] In some embodiments, the air supply channel has an air supply chamber on one side along the first direction, the first side wall of the shell along the second direction has a return air outlet formed thereon, the return air channel is located on the first side of the air supply channel along the third direction, the return air outlet is connected to the return air channel, and the air supply chamber is connected to the air supply channel, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0010] In some embodiments, the partition plate includes a guide plate body, the surface of the guide plate body facing the first side wall is a return air guide surface, and the return air guide surface includes a recessed area recessed in the direction away from the return air outlet; taking the plane perpendicular to the second direction as the projection plane, the projection of the return air outlet is located within the projection range of the recessed area.

[0011] In some embodiments, the recessed area is in the form of a curved surface.

[0012] In some embodiments, the return air guide surface includes a protruding area protruding toward the first side wall, and the protruding area is located on a side of the recessed area close to the air supply chamber along the first direction.

[0013] In some embodiments, the fresh air device includes a return air filter located in the return air channel, and the return air filter is located between the return air port and the guide plate body.

[0014] In some embodiments, the partition plate includes a guide plate body and a supporting plate body, the supporting plate body connects the guide plate body and the guide plate body, one end of the guide plate body is connected to the second side of the return air outlet along the third direction, and the other end of the guide plate body extends in a direction away from the return air outlet, and the return air filter is arranged on the supporting plate body.

[0015] In some embodiments, the air supply channel includes an expansion section, and the area of ​​the flow cross-section of the expansion section increases from away from the air supply chamber to closer to the air supply chamber.

[0016] In some embodiments, the partition includes a partition plate, a surface of the partition plate is a partial surface of the air supply chamber, one end of the partition plate along the third direction is connected to the partition plate, and a portion of the partition plate protrudes toward the direction close to the partition plate.

[0017] In some embodiments, the partition member includes a connecting plate, the connecting plate abuts against one side of the heat exchange core along the first direction, and the partition plate and the partition plate are both connected to the connecting plate.

[0018] In some embodiments, the partition comprises a connector disposed on the partition plate, the connector and the partition plate together define a slot opening on a first side facing a third direction, and a portion of the connecting plate is inserted into the slot.

[0019] In some embodiments, an air supply port is formed on the first side wall of the housing, and the air supply port is communicated with the air supply chamber.

[0020] In some embodiments, the shell is formed with a fresh air inlet and an exhaust outlet, and the partition includes an isolation plate, which connects the heat exchange core and the fresh air inlet to separate the heat exchange chamber into a fresh air channel and an exhaust channel, the fresh air channel is connected to the fresh air inlet, and the exhaust outlet is connected to the exhaust channel.

[0021] In some embodiments, the heat exchange core extends along a first direction, and the circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface and a supply air outlet surface, the return air inlet surface is a partial surface of the return air channel, and the supply air outlet surface is a partial surface of the supply air channel.

[0022] In the fresh air equipment provided in the embodiment of the present application, a partition plate separates the heat exchange chamber into independent return air channels and supply air channels. The airflows in the return air channel and the supply air channel will not circulate with each other, thereby reducing the probability of mixing of outdoor airflow and indoor airflow and improving the heat exchange effect. The return air channel and the supply air channel are separated by a partition plate, and the structure is simple. By simplifying the partition plate that defines the air duct, the overall weight of the fresh air equipment can be reduced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a fresh air device in one embodiment of the present application;

[0024] Figure 2 for Figure 1 The schematic diagram of the fresh air device shown in another perspective omitting some structures, wherein the first airflow path X1 is the indoor airflow path, and the second airflow path X2 is the outdoor airflow path;

[0025] Figure 3 for Figure 2 A partial cross-sectional view of the structure shown, wherein the dashed arrows schematically show the flow directions of the indoor airflow and the outdoor airflow;

[0026] Figure 4 for Figure 1 A partial cross-sectional view of the fresh air device shown, wherein the dotted arrow schematically shows the flow direction of the outdoor air flow in the air supply channel;

[0027] Figure 5 for Figure 1 A schematic diagram of a partial structure of the fresh air device shown;

[0028] Figure 6 is a schematic diagram of a first type of separator in an embodiment of the present application;

[0029] Figure 7 for Figure 6 A schematic diagram of another perspective of the first separator shown;

[0030] Figure 8 This is a schematic structural diagram of a second separator in an embodiment of the present application;

[0031] Fig. 9 is an exploded schematic diagram of a partial structure of a second separator;

[0032] Fig.10 for Fig. 9 Enlarged schematic diagram at point A in the middle.

[0033] Description of Reference Numerals

[0034] Shell 1; first side wall 11; second side wall 12; bottom plate 13; cover 14; heat exchange chamber 10a; return air channel 101a; air supply channel 102a; expansion section 102a'; steady flow section 102a"; fresh air channel 103a; exhaust air channel 104a; return air port 1a; air supply port 1b; fresh air port 1c; exhaust air port 1d; fan chamber 10b; air supply chamber 101b; exhaust air chamber 102b;

[0035] Heat exchange core 2; return air inlet surface 2a; supply air outlet surface 2b; fresh air inlet surface 2c; exhaust air outlet surface 2d;

[0036] Partition 3; guide groove 3a; partition plate 31; guide plate body 311; return air guide surface 311a; recessed area 311aa; protruding area 311ab; guide plate body 312; bearing plate body 313; folding plate body 314; partition plate 32; connecting plate 33; main plate body 331; folding edge 332; plug-in component 34; slot 34a; limit block 341; isolation plate 35; sealing plate 36;

[0037] Return air filter 4; supply air fan 5; exhaust air fan 6; partition plate 7; connecting flange 8. DETAILED DESCRIPTION

[0038] In the absence of conflict, the embodiments and technical features in the embodiments of the present application may be combined with each other, and the detailed descriptions in the specific implementation methods should be understood as explanations of the purpose of the present application and should not be regarded as improper limitations on the present application.

[0039] It should be noted that in the embodiments of the present application, down refers to the direction where the ground is located, and up is opposite to down; the first direction, the second direction and the third direction are three-dimensional vertical coordinate systems that are perpendicular to each other, and the first side of the third direction and the second side of the third direction are two opposite directions. In the embodiments of the present application, the orientation or position relationship of "first direction", "second direction" and "third direction" is based on the orientation or position relationship shown in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] See also Figures 1 to 10The embodiment of the present application provides a fresh air device, which includes a housing 1, a heat exchange core 2 and a partition 3. The partition 3 defines a part of the space in the housing 1 as a heat exchange cavity 10a. The heat exchange core 2 is located in the heat exchange cavity 10a. The partition 3 includes a partition plate 31. The partition plate 31 connects the heat exchange core 2 and the housing 1 to separate the heat exchange cavity 10a into a return air channel 101a and a supply air channel 102a. The two surfaces of the partition plate 31 in the thickness direction can be partial surfaces of the return air channel 101a and partial surfaces of the supply air channel 102a, respectively.

[0041] Indoor airflow is usually called return air, and outdoor airflow is usually called fresh air. The fresh air device realizes fresh air function and exhaust function. The indoor airflow and the outdoor airflow exchange heat with the heat exchange core 2 in the heat exchange cavity 10a. The fresh air function is the function of outdoor fresh air entering the room, and the exhaust function is the function of indoor dirty air being discharged to the outside.

[0042] The return air channel 101a is used to transport indoor air to the heat exchange core 2, that is, the return air channel 101a is used to transport indoor air before heat exchange. The supply air channel 102a is used to transport outdoor air from the heat exchange core 2, that is, the supply air channel 102a is used to transport outdoor air after heat exchange.

[0043] The return air duct 101a and the supply air duct 102a are independent of each other, that is, the indoor airflow in the return air duct 101a does not enter the supply air duct 102a, the outdoor airflow in the supply air duct 102a does not enter the return air duct 101a, and no gas flows between the return air duct 101a and the supply air duct 102a.

[0044] The indoor airflow and the outdoor airflow exchange heat in the heat exchange core 2 to achieve heat recovery and adjust the temperature and / or humidity of the outdoor airflow entering the room.

[0045] In the fresh air equipment provided in the embodiment of the present application, the partition plate 31 separates the heat exchange chamber 10a into a return air channel 101a and an air supply channel 102a which are independent of each other. The airflows in the return air channel 101a and the air supply channel 102a will not circulate with each other, thereby reducing the probability of mixing of outdoor airflow and indoor airflow and improving the heat exchange effect. The return air channel 101a and the air supply channel 102a are separated by a partition plate 31, and the structure is simple. By simplifying the partition plate 31 that defines the air duct, the overall weight of the fresh air equipment can be reduced to a certain extent.

[0046] The fresh air device provided in the embodiment of the present application can be installed on the ceiling or ceiling panel. The ceiling panel can separate the indoor space into a ceiling space and a living space. Users carry out their daily lives in the living space, and the ceiling space is not only used to beautify the interior decoration, but also to install other equipment. In one embodiment, the fresh air device is arranged in the ceiling space. In this way, the fresh air device is hidden in the ceiling space, avoiding the user from directly observing the entire fresh air device, thereby improving the visual aesthetics. It is understandable that the indoor space includes but is not limited to balconies, bathrooms, kitchens, etc., and can be a large-sized house, a small-sized house, or other types of production or living environments.

[0047] When the fresh air device provided in the embodiment of the present application is mounted on a ceiling or a suspended ceiling panel, the third direction is consistent with the up-down direction, the first side of the third direction may be the bottom, and the second side of the third direction may be the top. Taking the shell 1 as an example of being roughly hexahedral, the third direction may be the thickness direction of the shell 1, one of the first direction and the second direction may be the width direction of the shell 1, and the other of the first direction and the second direction may be the length direction of the shell 1. Taking the fresh air device mounted in the suspended ceiling space as an example, the size of the suspended ceiling space along the up-down direction is much smaller than the size of the suspended ceiling space along the first direction and the second direction, and the thickness direction of the shell 1 is along the up-down direction, which facilitates the assembly of the fresh air device to the suspended ceiling space.

[0048] The overall size of the fresh air equipment in the related art is relatively large, the overall machine is heavy, and the installation space for installing the fresh air equipment is limited. For example, the fresh air equipment is usually only suitable for large-sized houses and / or scenes with large balcony ceiling space. In addition, the overall size of the fresh air equipment in the related art is relatively large, resulting in a small maintenance space, making the fresh air equipment 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 of the fresh air equipment will be reduced, resulting in reduced heat exchange efficiency. The reduction in the size of the various components of the air duct causes the air path to change dramatically, resulting in 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 the related technology is large, and the plates used to isolate the air ducts in the fresh air equipment are flat-shaped. The flat-shaped plates are usually perpendicular to the chassis of the outer shell. The plates isolating the air ducts do not have the function of guiding air, and will also cause the air ducts to include many 90° turns, increasing the useless area in the outer shell and causing space waste in the outer shell; the direction of indoor air flow and outdoor air flow is usually curved, and therefore, eddy currents will appear at the intersection corners of each plate and the chassis, such as 90° turns, affecting the heat exchange efficiency and increasing the pressure loss of the entire heat exchange process. The unsmooth air path of the air flow will also increase the motor load of the fresh air equipment, thereby increasing the speed, and increasing the machine noise and vibration.

[0049] In one embodiment of the present application, please refer to Figures 1 to 5The air supply channel 102a has an air supply chamber 101b on one side along the first direction, the first side wall 11 of the housing 1 along the second direction is formed with a return air port 1a, the return air channel 101a is located on the first side of the air supply channel 102a along the third direction, the return air port 1a is connected to the return air channel 101a, and the air supply chamber 101b is connected to the air supply channel 102a, wherein the first direction, the second direction and the third direction are perpendicular to each other. Specifically, the air supply channel 102a is connected to the air supply chamber 101b near the outlet of the air supply chamber 101b along the first direction.

[0050] Taking the third direction being consistent with the up-down direction as an example, the return air channel 101a and the supply air channel 102a are distributed along the up-down direction, and the return air channel 101a may be located at the lower side of the supply air channel 102a.

[0051] The return air port 1a is connected with the outside and the return air passage 101a, and the return air port 1a is used to introduce the indoor airflow into the return air passage 101a.

[0052] The two surfaces of the partition plate 31 in the thickness direction are respectively partial surfaces of the return air channel 101a and partial surfaces of the supply air channel 102a. The indoor airflow enters the return air channel 101a along the second direction, and the indoor airflow flows along the surface of the partition plate 31 toward the first side, and the partition plate 31 plays a guiding role.

[0053] In this embodiment, the indoor airflow enters the return air channel 101a through the return air port 1a and flows to the heat exchange core 2, and the outdoor airflow from the heat exchange core 2 enters the air supply chamber 101b through the air supply channel 102a. The return air channel 101a and the air supply channel 102a are distributed along the third direction, which can reduce the size occupied by the return air channel 101a and the air supply channel 102a arranged along the second direction or arranged along the first direction. The air supply chamber 101b is located on one side of the air supply channel 102a along the first direction. The sum of the sizes of the return air channel 101a and the air supply channel 102a in the third direction can be roughly equal to the size of the air supply chamber 101b in the third direction. The return air channel 101a, the air supply channel 102a and the air supply chamber 101b are arranged in two directions respectively. In this way, without increasing the overall size of the housing 1 or the overall size of the housing 1 is relatively small, the volume of the return air channel 101a, the air supply channel 102a and the air supply chamber 101b can be larger, and the resistance on the air flow path can be smaller. The indoor airflow enters the return air channel 101a along the second direction, and flows toward the heat exchange core 2 along the surface of the partition plate 31. The partition plate 31 plays a guiding role. The indoor airflow from the return air port 1a can enter the return air channel 101a without a large angle, such as a 90° turn, thereby reducing the resistance of the indoor airflow and reducing noise. The outdoor airflow flows roughly along the first direction in the air supply channel 102a and enters the air supply chamber 101b. In this way, the outdoor airflow does not need to turn 90°, the wind path is smooth, the wind resistance is small, and the loss is small.

[0054] For ease of description, two side walls of the housing 1 opposite to each other along the second direction are defined as a first side wall 11 and a second side wall 12, for example, see Figures 1 to 3 , the fresh air outlet 1c can be formed on the second side wall 12.

[0055] For some examples, see Figures 1 to 3 , the side wall of the second side of the housing 1 along the third direction is the bottom plate 13. That is to say, the bottom plate 13 can be upward, that is, toward the ceiling.

[0056] For some examples, see Figures 1 to 3 The side wall of the first side of the housing 1 along the third direction may be a cover 14, and an inspection panel may be provided on the outer side of the cover 14. In this way, the cover 14 is formed with a take-in opening, and the inspection panel is used to open or cover the take-in opening, so that the operator can open the inspection panel from below and take out the components in the housing 1, such as the return air filter 4, through the take-in opening to inspect the components in the housing 1.

[0057] The position where the partition plate 31 is connected to the housing 1 is not limited. For example, the partition plate 31 can be connected to the return air outlet 1a, or can be connected to the surrounding part of the return air outlet 1a. For example, the partition plate 31 can be connected to the side wall where the return air outlet 1a is located, such as the first side wall 11. For another example, the partition plate 31 can be connected to the connection between the first side wall 11 and the chassis 13. For another example, the partition plate 31 can be connected to the part of the chassis 13 close to the first side wall 11.

[0058] In one embodiment, please refer to Figure 1 to Figure 2 The first side wall 11 of the housing 1 is formed with an air outlet 1b, which is connected to the air supply chamber 101b. The air outlet 1b is connected to the outside and the air supply chamber 101b, and is used to lead the outdoor air in the housing 1 out of the housing 1.

[0059] In this embodiment, the outdoor airflow in the air supply chamber 101b is discharged into the room through the air supply port 1b to achieve the fresh air function. The air supply port 1b and the return air port 1a are located on the same side wall of the housing 1 along the second direction, which can avoid the air supply port 1b and the return air port 1a being located on two different side walls of the housing 1, thereby increasing the size of the whole machine.

[0060] See also Figure 2 The air supply chamber 101b is used to install the air supply fan 5. The air supply fan 5 drives the fresh air to flow, that is, drives the outdoor air flow.

[0061] In some embodiments, the air supply fan 5 is a centrifugal fan.

[0062] Exemplarily, in one embodiment, the centrifugal fan includes a fan housing and a wind wheel, and the wind wheel is located in the fan housing. The wind wheel rotates to drive the airflow, and the fan housing plays a role of guiding the airflow. The axis of the wind wheel and the axis of the fan housing can both extend along the first direction, so that increasing the radial size of the wind wheel and the fan housing will basically not increase the size of the housing 1 along the first direction.

[0063] In one embodiment, the fan casing is a volute casing.

[0064] In one embodiment, the fan housing is provided with air inlets on both sides along the first direction, and the fan housing is provided with air outlets on a circumferential surface surrounding the first direction. The airflow enters the fan housing through the two air inlets and then flows out through the air outlets.

[0065] For ease of description, the fan casing of the air supply fan 5 is defined as an air supply casing. In one embodiment, an air flow inlet of the air supply casing faces the outlet of the air supply channel 102a, and the air flow outlet of the air supply casing is connected to the air supply port 1b. The air flow in the air supply chamber 101b enters the air supply casing through the two air flow inlets of the air supply casing, and then flows out to the air supply port 1b through the air flow outlet of the air supply casing. The length direction of the air supply channel 102a extends along the first direction, and the air flow in the air supply channel 102a converges to the air supply chamber 101b along the first direction, and then enters the air supply casing along the first direction, which can reduce large angles such as 90° turns during the flow of outdoor airflow, thereby reducing wind resistance, reducing eddy currents, and reducing noise.

[0066] In one embodiment, the air outlet of the air supply housing is aligned and connected with the air supply port 1b. That is, the air outlet of the air supply housing is similar in size and shape to the air supply port 1b. With the plane perpendicular to the second direction as the projection plane, the projection of the air outlet of the air supply housing at least partially overlaps with the projection of the air supply port 1b.

[0067] In one embodiment, taking the plane perpendicular to the first direction as the projection plane, the projection of the air inlet of the air supply housing toward the air supply channel 102a and the projection of the outlet of the air supply channel 102a at least partially overlap, thereby reducing wind resistance.

[0068] In one embodiment, please refer to Figures 2 to 7 The partition plate 31 includes a guide plate body 311, the surface of the guide plate body 311 facing the first side wall 11 is a return air guide surface 311a, and the return air guide surface 311a includes a recessed area 311aa recessed in the direction away from the return air outlet 1a; taking the plane perpendicular to the second direction as the projection plane, the projection of the return air outlet 1a is located within the projection range of the recessed area 311aa.

[0069] In this embodiment, the return air guide surface 311a is a part of the surface of the return air channel 101a. The air volume of the indoor airflow from the return air outlet 1a is relatively large. Taking the plane perpendicular to the second direction as the projection surface, the projection of the return air outlet 1a is located within the projection range of the recessed area 311aa. The recessed area 311aa increases the space of the return air channel 101a corresponding to the return air outlet 1a area, reduces the wind speed of the indoor airflow, and thus reduces the friction noise between the indoor airflow and the return air guide surface 311a.

[0070] For some examples, see Figures 2 to 7 , a part of the guide plate body 311 can be bent in a direction away from the return air outlet 1a to form a recessed area 311aa. In other words, the portion of the guide plate body 311 corresponding to the recessed area 311aa occupies the space of the air supply channel 102a. In this way, it is not necessary to thin the thickness of the portion of the guide plate body 311 corresponding to the recessed area 311aa, the structural strength of the guide plate body 311 is good, the outdoor airflow volume of the portion of the air supply channel 102a corresponding to the recessed area 311aa is small, and the required air supply space is also relatively small. The portion of the guide plate body 311 corresponding to the recessed area 311aa occupies the space of the air supply channel 102a, which will not increase the resistance of the air supply channel 102a; it can also achieve the effect of balancing the return air channel 101a and the air supply channel 102a.

[0071] In one embodiment, please refer to Figure 2 and Figure 7 , the concave area 311aa is an arc surface. Exemplarily, the concave area 311aa can be an arc surface. Through the arc surface guidance, the probability of indoor airflow generating vortex is reduced, and the noise generated by the indoor airflow colliding with the guide plate body 311 is further reduced.

[0072] In one embodiment, please refer to Figures 2 to 7 The return air guide surface 311a includes a protruding area 311ab protruding toward the direction close to the first side wall 11, and the protruding area 311ab is located on the side of the recessed area 311aa along the first direction close to the air supply chamber 101b. In other words, the area of ​​the flow cross section of the return air channel 101a corresponding to the protruding area 311ab is relatively small. The indoor airflow from the return air port 1a is diverted toward the direction close to the air supply chamber 101b, and the air volume of the return air channel 101a away from the recessed area 311aa is relatively small. The relatively small area of ​​the flow cross section of the return air channel 101a corresponding to the protruding area 311ab will not excessively increase the wind speed, and will not excessively increase the friction noise between the indoor airflow and the guide plate body 311.

[0073] It should be noted that the flow cross section refers to a cross section perpendicular to a streamline cluster, such as an airflow.

[0074] In one embodiment, the portion of the guide plate body 311 corresponding to the protruding area 311ab occupies the space of the return air channel 101a. The indoor airflow volume of the portion of the return air channel 101a corresponding to the protruding area 311ab is small, and the required space is relatively small. The portion of the guide plate body 311 corresponding to the protruding area 311ab occupies the space of the return air channel 101a, and will not increase the resistance of the return air channel 101a; the outdoor airflow volume of the portion of the air supply channel 102a corresponding to the protruding area 311ab is large, and the protruding area 311ab can increase the space of the corresponding portion of the air supply channel 102a, so as to reduce the friction noise between the outdoor airflow and the protruding area 311ab corresponding to the air supply channel 102a, so as to achieve the effect of balancing the return air channel 101a and the air supply channel 102a.

[0075] In some embodiments, the concave area 311aa and the convex area 311ab are smoothly transitioned. That is to say, the return air guide surface 311a is streamlined, and the indoor airflow can flow to the heat exchange core 2 in the first side of the third direction along the return air guide surface 311a, guide and divert the indoor airflow, reduce the vortex caused by the vertical surface in the related technology, avoid the wind resistance caused by the existence of the corner, and have a significant noise reduction effect, and correspondingly reduce the pressure loss in the entire heat exchange process. Therefore, the heat exchange efficiency can be improved, and the resistance and energy consumption can be reduced.

[0076] In one embodiment, please refer to Figure 4 The air supply passage 102a includes an expansion section 102a', and the area of ​​the flow cross section of the expansion section 102a' increases from the direction away from the air supply chamber 101b to the direction close to the air supply chamber 101b. The air supply chamber 101b is located downstream of the air supply passage 102a. The closer the air supply passage 102a is to the air supply chamber 101b, the greater the air volume and the larger the required space. The flow cross section of the expansion section 102a' increases from the direction away from the air supply chamber 101b to the direction close to the air supply chamber 101b, so as to reduce the friction noise between the outdoor airflow and the surface of the expansion section 102a'.

[0077] For some examples, see Figure 4 and Figure 7 The portion of the air supply channel 102a corresponding to the protruding area 311ab may be the expansion section 102a'.

[0078] In one embodiment, please refer to Figure 4 and Figure 7 The air supply channel 102a includes a steady flow section 102a", which is located on the side of the expansion section 102a' away from the air supply chamber 101b along the first direction, and the area of ​​the maximum flow cross-section of the steady flow section 102a" is not greater than the area of ​​the minimum flow cross-section of the expansion section 102a'. In some embodiments, the portion of the air supply channel 102a corresponding to the recessed area 311aa may be the steady flow section 102a".

[0079] In one embodiment, please refer to Figures 2 to 8 , the partition 3 includes a partition plate 32, the surface of the partition plate 32 is part of the surface of the air supply chamber 101b, one end of the partition plate 32 along the third direction is connected to the partition plate 31, and part of the partition plate 32 protrudes in the direction close to the partition plate 31. The surface of the partition plate 32 away from the heat exchange chamber 10a along the first direction is part of the surface of the air supply chamber 101b. The outdoor airflow is concentrated in the air supply chamber 101b and then sent to the indoor environment. The air volume of the air supply chamber 101b reaches the maximum. The partition plate 32 is located at the junction of the air supply channel 102a and the air supply chamber 101b. The part of the partition plate 32 protrudes in the direction close to the partition plate 31, which can not only expand the volume of the air supply chamber 101b, thereby increasing the space of the air supply chamber 101b and reducing the wind speed in the air supply chamber 101b, but also reduce local eddies and airflow stagnation areas, improve gas turbulence, and achieve the effect of reducing noise.

[0080] In one embodiment, a portion of the partition plate 32 protrudes toward the direction close to the partition plate 31 to form an air guide portion, and the surface of the air guide portion constituting the air supply chamber 101b may be a flared curved surface. The airflow from the air supply channel 102a may flow smoothly along the flared curved surface of the air guide portion toward the first side of the third direction, and at the same time, the flared curved surface guides the originally blocked airflow to the air supply fan 5, thereby reducing airflow dead angles and vortexes.

[0081] In one embodiment, please refer to Figures 5 to 8 The partition 3 includes a connecting plate 33 , the connecting plate 33 abuts against one side of the heat exchange core 2 along the first direction, and the partition plate 32 and the partition plate 31 are both connected to the connecting plate 33 .

[0082] The surface of the connecting plate 33 that is away from the heat exchange core 2 along the first direction is the surface of the air supply chamber 101b. The connecting plate 33 can provide support for the heat exchange core 2. The connecting plate 33 abuts against one side of the heat exchange core 2 along the first direction, so that the airflow flows through the heat exchange core 2, and the airflow can be prevented from flowing through the gap between the connecting plate 33 and the heat exchange core 2.

[0083] The connection plate 33 and the partition plate 32 may be detachably connected or non-detachably connected. The detachable connection includes but is not limited to screw connection, bolt connection or clamping connection, etc.

[0084] In some embodiments, the connecting plate 33 and the partition plate 32 may also be an integrally formed structure, thereby reducing the number of assembly steps.

[0085] In one embodiment, please refer to Figures 8 to 10 The partition 3 includes a connector 34 disposed on the partition plate 31. The connector 34 and the partition plate 32 together define a slot 34a opened on a first side toward the third direction. A portion of the connecting plate 33 is inserted into the slot 34a.

[0086] Exemplarily, the connecting plate 33 and the partition plate 32 can be manufactured separately, and the connecting plate 33 can be inserted into the slot 34a along the third direction, and then the connecting plate 33 and the partition plate 32 are fixed. The groove wall surface of the slot 34a can position and limit the connecting plate 33, making the installation of the connecting plate 33 simpler and more efficient, thereby improving the assembly efficiency.

[0087] In one embodiment, please refer to Figures 8 to 10 The connecting plate 33 includes a main body 331 and a folded edge 332. The main body 331 is formed with a limiting groove opening toward the partition plate 32. The folded edge 332 is connected to the main body 331 and bent toward one side of the first direction. The plug-in component 34 includes a limiting block 341. The limiting block 341 is arranged at intervals on one side of the partition plate 32 along the second direction to form a slot 34a. Part of the partition plate 32 is accommodated in the limiting groove, and the folded edge 332 is inserted into the slot 34a. In this way, the freedom of the connecting plate 33 in multiple directions of the first direction and the second direction is limited by the limiting groove and the slot 34a.

[0088] In one embodiment, please refer to Figures 2 to 7 The fresh air device includes a return air filter 4 located in the return air channel 101a, and the return air filter 4 is located between the return air port 1a and the guide plate body 311. The indoor airflow from the return air port 1a is filtered by the return air filter 4 and then guided to the heat exchange core 2 by the guide plate body 311. The return air filter 4 is used to filter the airflow, improve the cleanliness of the airflow, keep the heat exchange core 2 clean, and extend the service life of the heat exchange core 2.

[0089] The return air filter 4 can be used to filter the airflow to improve the cleanliness of the airflow. The functions of the return air filter 4 include but are not limited to removing dust, microorganisms and / or harmful gases in the air.

[0090] Exemplarily, the return air filter 4 can filter impurities such as dust, hair or paper scraps carried by the indoor airflow. The particle size of the 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 4 can include but is not limited to a primary filter. The primary filter is mainly used to filter impurities larger than 5 (microns).

[0091] In some embodiments, the return air filter 4 can be fixed on the partition 3. In this way, the partition 3 can not only be used to define the flow channel, but also be used to fix the return air filter 4.

[0092] For some examples, see Figures 2 to 8, the partition 3 is formed with a guide groove 3a, and the end of the return air filter 4 along the first direction is located in the guide groove 3a. For example, the surface of the partition plate 32 forming the return air channel 101a is formed with the guide groove 3a. Exemplarily, the return air filter 4 can be inserted into the guide groove 3a from the third direction to complete the positioning and assembly of the return air filter 4, and the operation is simple.

[0093] In this embodiment, the guide groove 3a is located in the return air channel 101a, and the groove wall of the guide groove 3a can limit the end of the return air filter 4 along the first direction, playing a limiting role. The return air port 1a is located on one side of the return air filter 4 along the second direction, so that the outdoor air from the return air port 1a flows through the return air filter 4.

[0094] In some embodiments, a guide groove 3a is formed on at least one side surface of the return air channel 101a along the first direction.

[0095] In some embodiments, the fresh air device includes a buckle arranged on the partition 3, and the buckle is snap-connected with the return air filter 4.

[0096] In some embodiments, the buckle includes two elastic arms disposed in the guide groove 3a, and the two elastic arms are located on both sides of the return air filter 4 in the thickness direction to clamp the return air filter 4. In this way, the return air filter 4 is inserted into the guide groove 3a along the third direction to a preset position, and the elastic arms clamp the return air filter 4 to complete the fixed installation of the return air filter 4, which is simple to operate and convenient for loading and unloading the return air filter 4.

[0097] In one embodiment, please refer to Figures 2 to 8 The partition plate 31 includes a guide plate body 312 and a bearing plate body 313. The bearing plate body 313 connects the guide plate body 312 and the guide plate body 311. One end of the guide plate body 312 is connected to the second side of the return air outlet 1a along the third direction. The other end of the guide plate body 312 extends obliquely in a direction away from the return air outlet 1a. The return air filter 4 is arranged on the bearing plate body 313. The included angle between the guide plate body 312 and the return air filter 4 is an obtuse angle. The guide plate body 312 is inclined toward the return air outlet 1a. The indoor airflow from the return air outlet 1a flows toward the first side of the third direction through the guide plate body 312 to the return air filter 4, thereby reducing the airflow blockage and the probability of vortex.

[0098] For example, in one embodiment, please refer to Figures 2 to 7 The bearing plate 313 is perpendicular to the third direction, and the return air filter 4 abuts against the surface of the bearing plate 313 facing the first side of the third direction. In this way, the airflow from the return air port 1a is prevented from flowing through the gap between the return air filter 4 and the bearing plate 313 as much as possible.

[0099] For example, in one embodiment, please refer to Figures 2 to 7The surface of the guide plate body 312 facing the return air outlet 1a is a plane. In this way, the surface of the guide plate body 312 facing the return air outlet 1a guides the indoor air flow to flow smoothly.

[0100] In one embodiment, please refer to Figures 2 to 8 The partition plate 31 includes a folded plate body 314, the folded plate body 314 connects the guide plate body 311 and the heat exchange core 2, and the folded plate body 314 is perpendicular to the third direction. For example, the folded plate body 314 can be smoothly connected to the guide plate body 311. The folded plate body 314 facilitates the indoor air flow to flow to the return air inlet surface 2a.

[0101] In one embodiment, please refer to Figures 2 to 8 The housing 1 is formed with a fresh air port 1c and an exhaust port 1d, and the partition 3 includes a partition plate 35, which is connected to the heat exchange core 2 and the fresh air port 1c to separate the heat exchange chamber 10a into a fresh air channel 103a and an exhaust air channel 104a, the fresh air channel 103a is connected to the fresh air port 1c, and the exhaust port 1d is connected to the exhaust air channel 104a. The two surfaces of the partition plate 35 in the thickness direction are part of the surface of the fresh air channel 103a and part of the surface of the exhaust air channel 104a.

[0102] The fresh air inlet 1c connects the fresh air passage 103a with the outside, and is used to introduce outdoor air into the fresh air passage 103a. The fresh air passage 103a is used to transport outdoor air to the heat exchange core 2. In other words, the fresh air passage 103a is used to transport outdoor air before heat exchange.

[0103] The exhaust port 1d is connected to the exhaust passage 104a and the outside, and the exhaust port 1d is used to discharge the outdoor airflow out of the housing 1. The exhaust passage 104a is used to transport the outdoor airflow to the exhaust port 1d, and the indoor airflow is transported to the outdoor environment through the exhaust passage 104a and the exhaust port 1d. In other words, the exhaust passage 104a is used to transport the indoor airflow after heat exchange.

[0104] The fresh air channel 103a and the exhaust channel 104a are independent of each other, that is, the outdoor airflow in the fresh air channel 103a does not enter the exhaust channel 104a, the indoor airflow in the exhaust channel 104a does not enter the fresh air channel 103a, and no gas flows between the fresh air channel 103a and the exhaust channel 104a.

[0105] Exemplarily, the flow path of the indoor air flow is: return air port 1a, return air channel 101a, heat exchange core 2, exhaust air channel 104a and exhaust air port 1d. The flow path of the outdoor air flow is: fresh air port 1c, fresh air channel 103a, heat exchange core 2, supply air channel 102a and supply air port 1b. Both the indoor air flow and the outdoor air flow exchange heat in the heat exchange core 2.

[0106] In this embodiment, the isolation plate 35 separates the heat exchange chamber 10a into independent fresh air passages 103a and exhaust air passages 104a, and the airflows in the fresh air passages 103a and the exhaust air passages 104a will not circulate with each other, thereby reducing the probability of mixing of outdoor airflow and indoor airflow and improving the heat exchange effect. The fresh air passage 103a and the exhaust air passage 104a are separated by an isolation plate 35, and the structure is simple. By simplifying the isolation plate 35 that defines the air passage, the overall weight of the fresh air equipment can be reduced to a certain extent.

[0107] In one embodiment, please refer to Figures 2 to 5 The heat exchange core 2 extends along the first direction, and the circumferential surface of the heat exchange core 2 surrounding the first direction includes a return air inlet surface 2a and a supply air outlet surface 2b, the return air inlet surface 2a is a partial surface of the return air channel 101a, and the supply air outlet surface 2b is a partial surface of the supply air channel 102a.

[0108] The extension of the heat exchange core 2 along the first direction means that the airflow enters or flows out of the heat exchange core 2 from the circumference surrounding the first direction. For example, the extension of the heat exchange core 2 along the first direction may be that a plurality of heat exchange medium sheets of the heat exchange core 2 are stacked at intervals along the first direction. The heat exchange medium sheets are used for heat exchange between indoor airflow and outdoor airflow. An interval space is formed between two adjacent heat exchange medium sheets. The two adjacent interval spaces can flow indoor airflow and outdoor airflow respectively, and the indoor airflow and the outdoor airflow exchange heat through the heat exchange medium sheets. In other words, the indoor airflow and the outdoor airflow enter and exit the heat exchange core 2 from the circumference surrounding the first direction of the heat exchange core 2. The heat exchange medium sheets can be used for heat exchange but not for circulating airflow.

[0109] The return air inlet surface 2a is the surface where the indoor air flows into the heat exchange core 2. The supply air outlet surface 2b is the surface where the outdoor air flows out of the heat exchange core 2. The indoor air flow in the return air passage 101a enters the heat exchange core 2 through the return air inlet surface 2a, and the outdoor air flow from the heat exchange core 2 enters the supply air passage 102a through the supply air outlet surface 2b.

[0110] If the heat exchange core 2 extends along the third direction, that is, multiple heat exchange medium sheets are stacked along the third direction, the thickness of the housing 1 along the vertical direction will be greatly increased, making it difficult for the whole machine to be assembled into an installation space with a small height dimension along the vertical direction. If the size of the heat exchange core 2 along the third direction is reduced in order to adapt to the installation space with a small height dimension along the vertical direction, the number of heat exchange medium sheets will be too small or the spacing will be too small, resulting in poor heat exchange effect.

[0111] Exemplarily, the return air outlet 1a is formed on the first side wall 11 of the shell 1 along the second direction, and the indoor air flow enters the return air channel 101a from one side of the second direction. The indoor air flow from the return air outlet 1a can flow smoothly in a curve into the return air inlet surface 2a.

[0112] In this embodiment, when the size of the housing 1 along the third direction is limited, the heat exchange core 2 extends along the first direction, the number of heat exchange medium sheets can be relatively large and / or the spacing can be relatively large, and the heat exchange effect is good. The return air channel 101a and the supply air channel 102a are located on the circumference of the heat exchange core 2 around the first direction, so as to facilitate the smooth flow of indoor and outdoor air flows, reduce eddy currents, and improve heat exchange efficiency. The return air inlet surface 2a is a partial surface of the return air channel 101a, and the supply air outlet surface 2b is a partial surface of the supply air channel 102a. This facilitates the air flow to flow between the air duct and the heat exchange core 2 and reduces obstruction.

[0113] In some embodiments, the heat exchange core 2 includes a skeleton, and the skeleton is used to assemble heat exchange medium plates to maintain a spacing space between two adjacent heat exchange medium plates.

[0114] The heat exchange medium sheet may adopt the structure of the prior art. For example, the heat exchange medium sheet may be made of fiber, aluminum, steel or resin, etc.

[0115] For some examples, see Figure 5 The partition 3 defines the space in the housing 1 as a heat exchange chamber 10a and a fan chamber 10b. The partition 3 divides the space in the housing 1 to define an air duct in the housing 1.

[0116] For some examples, see Figure 2 and Figure 5 The fan chamber 10b includes an air supply chamber 101b and an air exhaust chamber 102b which are independent of each other, and the air exhaust passage 104a is connected to the air exhaust chamber 102b.

[0117] The exhaust chamber 102b is used to install the exhaust fan 6. The exhaust fan 6 drives the return air to flow, that is, drives the indoor air flow.

[0118] The air supply chamber 101b and the exhaust chamber 102b are independent of each other, that is, the indoor air flow in the exhaust chamber 102b does not enter the air supply chamber 101b, the outdoor air flow in the air supply chamber 101b does not enter the exhaust chamber 102b, and there is no gas circulation between the air supply chamber 101b and the exhaust chamber 102b.

[0119] In this embodiment, for indoor airflow: the indoor airflow enters the return air channel 101a through the return air port 1a and enters the heat exchange core 2. After heat exchange, the indoor airflow enters the exhaust air channel 104a and the exhaust air chamber 102b in sequence, and is discharged to the outside through the exhaust air port 1d. For outdoor airflow: the outdoor airflow enters the fresh air channel 103a through the fresh air port 1c and enters the heat exchange core 2. After heat exchange, the outdoor airflow enters the supply air channel 102a and the supply air chamber 101b in sequence, and is discharged to the room through the supply air port 1b.

[0120] In one embodiment, please refer to Figures 2 to 5, the exhaust chamber 102b is located on one side of the exhaust passage 104a along the first direction. Specifically, the exhaust passage 104a is connected to the exhaust chamber 102b along the first direction near the outlet of the exhaust chamber 102b. The outdoor airflow flows roughly along the first direction in the exhaust passage 104a and enters the exhaust chamber 102b. In this way, the outdoor airflow does not need to turn 90 degrees, the wind path is smooth, the wind resistance is small, and the loss is small.

[0121] For some examples, see Figure 2 and Figure 5 The fresh air device includes a partition plate 7, which divides the fan chamber 10b into an air supply chamber 101b and an air exhaust chamber 102b that are independent of each other.

[0122] The partition plate 7 can be fixed to at least one of the partition 3 and the housing 1. The fixing method includes but is not limited to a detachable connection and a non-detachable connection. For example, the partition plate 7 and the partition 3 can be connected by a fastener; the partition plate 7 and the housing 1 can be connected by a fastener.

[0123] In the embodiment of the present application, the fasteners include but are not limited to screws or bolts, etc.

[0124] For some examples, see Figures 2 to 5 , the heat exchange core 2 extends along the first direction, the air supply chamber 101b and the exhaust chamber 102b are arranged along the second direction, and are both located on the same side of the heat exchange core 2 along the first direction. In other words, the air supply fan 5 and the exhaust fan 6 are arranged along the second direction, and are both located on the same side of the heat exchange core 2 along the first direction. The fan chamber 10b and the heat exchange core 2 are roughly T-shaped, so that the air flow in the housing 1 is smoother, achieving the effects of large air volume, low energy consumption and quietness.

[0125] In this embodiment, if the air supply chamber 101b and the exhaust chamber 102b are located on different sides of the heat exchange core 2 along the first direction, the air supply chamber 101b and the exhaust chamber 102b respectively occupy the space in the shell 1 along the first direction, causing the size of the shell 1 along the first direction to increase; while the air supply chamber 101b and the exhaust chamber 102b are both located on the same side of the heat exchange core 2 along the first direction, the air supply chamber 101b and the exhaust chamber 102b will not increase the size of the shell 1 along the first direction respectively, and the air supply chamber 101b, the exhaust chamber 102b and the heat exchange core 2 have a compact structure. The air supply chamber 101b and the exhaust chamber 102b are arranged along the second direction, making full use of the space of the shell 1 along the second direction, and comprehensively considering the space of the shell 1 along the first direction and the second direction, thereby reducing the overall size of the fresh air device and meeting the miniaturization requirements.

[0126] In one embodiment, please refer to Figure 2 , the axis of the air supply fan 5 and the axis of the exhaust fan 6 both extend along the first direction.

[0127] The larger the radial dimensions of the air supply fan 5 and the exhaust fan 6 are, the larger the air volume of the air supply fan 5 and the exhaust fan 6 is; conversely, the smaller the radial dimensions of the air supply fan 5 and the exhaust fan 6 are, the smaller the air volume of the air supply fan 5 and the exhaust fan 6 is. Taking the third direction as an example, if the axes of the air supply fan 5 and the exhaust fan 6 are along the third direction, that is, the air supply fan 5 and the exhaust fan 6 are arranged on the chassis 13 of the housing 1 along the third direction in a lying manner, increasing the radial dimensions of the air supply fan 5 and the exhaust fan 6 will cause the size of the whole machine to be too large. If the radial dimensions of the air supply fan 5 and the exhaust fan 6 are reduced in order to reduce the size of the whole machine, the air volume of the air supply fan 5 will be too small. In other words, if the air supply fan 5 and the exhaust fan 6 are arranged in a lying manner on the chassis 13 of the casing 1 along the third direction, when the air supply fan 5 and the exhaust fan 6 have a large radial dimension, the dimension along the first direction will be excessively increased, which is not conducive to product miniaturization.

[0128] In this embodiment, the axis of the air supply fan 5 and the axis of the exhaust fan 6 both extend along the first direction, that is, the air supply fan 5 and the exhaust fan 6 are arranged on the chassis 13 of the outer casing 1 in a manner similar to an upright position. When the air supply fan 5 and the exhaust fan 6 have larger radial dimensions, the air supply fan 5 and the exhaust fan 6 will not excessively increase the size of the whole machine along the first direction, and the volume occupied by the air supply fan 5 and the exhaust fan 6 is reduced, the structural layout is more reasonable, and the volume of the whole machine is smaller.

[0129] It is understandable that the axial direction and radial direction of the air supply fan 5 are perpendicular to each other, and the axis of the air supply fan 5 is a straight line extending along the axial direction. The axial direction and radial direction of the exhaust fan 6 are perpendicular to each other, and the axis of the exhaust fan 6 is a straight line extending along the axial direction.

[0130] In some embodiments, both the air supply fan 5 and the exhaust fan 6 are centrifugal fans. The specific structure of the centrifugal fan is as described above and will not be repeated here.

[0131] For ease of description, the fan housing of the exhaust fan 6 is defined as an exhaust housing. In one embodiment, an air flow inlet of the exhaust housing faces the outlet of the exhaust passage 104a, and the air flow outlet of the exhaust housing is connected to the exhaust port 1d. The air flow in the exhaust chamber 102b enters the exhaust housing through the two air flow inlets of the exhaust housing, and then flows out to the exhaust port 1d through the air flow outlet. The length direction of the exhaust passage 104a extends along the first direction, and the air flow in the exhaust passage 104a converges to the exhaust chamber 102b along the first direction, and then enters the exhaust housing along the first direction, which can reduce large angles such as 90° turns during the flow of indoor air flow, thereby reducing wind resistance, reducing eddy currents, and reducing noise.

[0132] In one embodiment, the air outlet of the exhaust fan housing is aligned and connected to the exhaust port 1d. That is, the air outlet of the exhaust fan housing is similar in size and shape to the exhaust port 1d. Taking the plane perpendicular to the second direction as the projection plane, the projection of the air outlet of the exhaust fan housing at least partially overlaps with the projection of the exhaust port 1d.

[0133] In one embodiment, please refer to Figures 2 to 5 The two side walls of the housing 1 opposite to each other along the second direction are respectively formed with a return air port 1a and a fresh air port 1c. The circumferential surface of the heat exchange core 2 surrounding the first direction includes a return air inlet surface 2a and a fresh air inlet surface 2c. The return air inlet surface 2a is located on the side of the fresh air inlet surface 2c close to the return air port 1a. Specifically, the fresh air inlet surface 2c is located on the side of the return air inlet surface 2a close to the fresh air port 1c.

[0134] The return air inlet surface 2a is the surface where the indoor air flows into the heat exchange core 2. The fresh air inlet surface 2c is the surface where the outdoor air flows into the heat exchange core 2.

[0135] In this embodiment, the indoor airflow from the return air outlet 1a enters the heat exchange core 2 through the return air inlet surface 2a, and the outdoor airflow from the fresh air outlet 1c enters the heat exchange core 2 through the fresh air inlet surface 2c. The indoor airflow and the outdoor airflow enter the heat exchange core 2 from two opposite sides of the second direction respectively. On the one hand, the return air outlet 1a and the return air inlet surface 2a are opposite to each other, and the fresh air outlet 1c and the fresh air inlet surface 2c are opposite to each other, which can reduce the 90° turn in the airflow process, make the air path smoother, reduce eddy currents and the generated wind noise, and has the characteristics of large air volume, low energy consumption and low noise; on the other hand, it can extend the heat exchange time of the indoor airflow and the outdoor airflow in the heat exchange core 2, thereby improving the heat exchange efficiency.

[0136] In one embodiment, please refer to Figure 3 , the return air inlet surface 2a is inclined toward the return air outlet 1a. That is to say, the angle between the return air inlet surface 2a and the plane where the return air outlet 1a is located is approximately an acute angle. In this way, it is convenient for the indoor airflow from the return air outlet 1a to smoothly enter the return air inlet surface 2a.

[0137] In one embodiment, please refer to Figure 3 , the fresh air inlet surface 2c is inclined toward the fresh air outlet 1c. That is to say, the angle between the fresh air inlet surface 2c and the plane where the fresh air outlet 1c is located is approximately an acute angle. In this way, it is convenient for the indoor air flow from the fresh air outlet 1c to smoothly enter the fresh air inlet surface 2c.

[0138] In one embodiment, please refer to Figures 1 to 5 The first side wall 11 of the shell 1 along the second direction is formed with a return air port 1a and an air supply port 1b, the second side wall 12 of the shell 1 along the second direction is formed with a fresh air port 1c and an exhaust port 1d, the air flow outlet of the air supply fan 5 is connected to the air supply port 1b, and the air flow outlet of the exhaust fan 6 is connected to the exhaust port 1d.

[0139] In this embodiment, the return air inlet 1a and the fresh air inlet 1c are located on both sides of the heat exchange core 2 along the second direction, and the supply air inlet 1b and the exhaust air inlet 1d are located on both sides of the fan chamber 10b along the second direction. On the one hand, it is convenient for the return air inlet 1a, the supply air inlet 1b, the fresh air inlet 1c and the exhaust air inlet 1d to be externally connected to the air duct to avoid interference between the air duct and the ceiling panel and the ceiling, and it can also avoid the problem of too large size caused by the formation of the above-mentioned air outlets on more than two side walls of the outer shell 1; on the other hand, the indoor airflow and the outdoor airflow flow smoothly in the outer shell 1, which can reduce eddy currents.

[0140] For some examples, see Figures 1 to 5 At least one of the return air port 1a, the supply air port 1b, the fresh air port 1c and the exhaust air port 1d is provided with a connecting flange 8 on its outer side. The connecting flange 8 is used for connecting an external air duct.

[0141] In one embodiment, please refer to Figures 2 to 3 The circumferential surface of the heat exchange core 2 surrounding the first direction includes a return air inlet surface 2a, a fresh air inlet surface 2c, an exhaust air outlet surface 2d and a supply air outlet surface 2b. The exhaust air outlet surface 2d is opposite to the return air inlet surface 2a, and the supply air outlet surface 2b is opposite to the fresh air inlet surface 2c. The return air inlet surface 2a, the fresh air inlet surface 2c, the exhaust air outlet surface 2d and the supply air outlet surface 2b are connected in sequence.

[0142] The exhaust air outlet surface 2d is a surface from which the indoor air flows out of the heat exchange core 2. The supply air outlet surface 2b is a surface from which the outdoor air flows out of the heat exchange core 2.

[0143] The outdoor air flow before heat exchange enters the heat exchange core 2 through the fresh air inlet surface 2c, and the outdoor air flow after heat exchange flows out of the heat exchange core 2 through the air supply outlet surface 2b.

[0144] The indoor air flow before heat exchange enters the heat exchange core 2 through the return air inlet surface 2a, and the indoor air flow after heat exchange flows out of the heat exchange core 2 through the exhaust air outlet surface 2d.

[0145] The return air inlet surface 2a, the fresh air inlet surface 2c, the exhaust air outlet surface 2d and the supply air outlet surface 2b are connected in sequence, and in the plane projection perpendicular to the first direction, the projection formed by the return air inlet surface 2a, the fresh air inlet surface 2c, the exhaust air outlet surface 2d and the supply air outlet surface 2b is roughly a quadrilateral. In other words, with the plane perpendicular to the first direction as the cross section, the cross section of the heat exchange core 2 is roughly a quadrilateral, for example, it can be a regular quadrilateral. Compared with the heat exchange core with a hexagonal or larger cross section, the cross-sectional area of ​​the heat exchange core 2 of the present application is smaller, and the size of the heat exchange core 2 in the second direction and the third direction is smaller.

[0146] The exhaust air outlet surface 2d is opposite to the return air inlet surface 2a, and the supply air outlet surface 2b is opposite to the fresh air inlet surface 2c. In this way, the indoor airflow and the outdoor airflow cross-flow, which can improve the heat exchange efficiency. When the cross-sectional size of the heat exchange core 2 is small, the size of the heat exchange core 2 along the first direction can be used to maintain the heat exchange performance.

[0147] In one embodiment, the connection between the exhaust air outlet surface 2d and the air supply air outlet surface 2b is a first corner, and the first corner is arranged on the bottom plate 13 of the housing 1. With such a design, the exhaust air outlet surface 2d and the air supply air outlet surface 2b are not blocked by the bottom plate 13, so that the exhaust air outlet surface 2d and the air supply air outlet surface 2b are convenient for air discharge.

[0148] In one embodiment, the connection between the fresh air inlet surface 2c and the exhaust air outlet surface 2d is a second corner, and one end of the isolation plate 35 can be connected to the second corner.

[0149] In one embodiment, the connection point between the return air inlet surface 2a and the supply air outlet surface 2b is a third corner, and one end of the partition plate 31 can be connected to the third corner.

[0150] In one embodiment, the connection between the return air inlet surface 2a and the fresh air inlet surface 2c is a fourth corner, and the fourth corner can abut against the cover body 14 on the first side of the housing 1 along the third direction.

[0151] The isolation plate 35 may be an integrally formed structure. The material of the isolation plate 35 includes but is not limited to plastic.

[0152] The partition plate 31 may be an integrally formed structure. The material of the partition plate 31 includes but is not limited to plastic.

[0153] For some examples, see Figures 5 to 7 The partition 3 may further include a sealing plate 36 spaced from the connecting plate 33 along the first direction, the sealing plate 36 connecting the partition plate 31 and the isolation plate 35 at one end away from the connecting plate 33 along the first direction. The end of the heat exchange core 2 away from the connecting plate 33 along the first direction may abut against the sealing plate 36.

[0154] For example, see Figure 6 The surface of the sealing plate 36 constituting the fresh air passage 103a can form a guide groove 3a.

[0155] In some embodiments, the partition 3 may be an integrally formed structure. For example, the partition 3 may be an integrally formed injection molded structure. In this way, the assembly process may be reduced.

[0156] In some embodiments, the separator 3 may also be a split structure, that is, the separator 3 may be composed of a plurality of independently manufactured individual components.

[0157] The material of the partition 3 includes but is not limited to plastics and the like. It is difficult to make curved surfaces for sheet metal parts, and it is difficult to make air guide structures according to the airflow direction. The design is limited, and the thickness of the thermal insulation foam parts is usually very large and occupies a large space. Compared with sheet metal parts and thermal insulation foam parts, plastic parts have the advantages of flexible design of curved surfaces for air guide structures, relatively small thickness and do not occupy too much space.

[0158] In some embodiments, the two end surfaces of the heat exchange core 2 along the first direction may abut against the outer shell 1 or the partition 3. For example, one end surface of the heat exchange core 2 along the first direction abuts against the outer shell 1, and the other end surface of the heat exchange core 2 along the first direction abuts against the partition 3. For another example, both end surfaces of the heat exchange core 2 along the first direction abut against the outer shell 1. For another example, both end surfaces of the heat exchange core 2 along the first direction abut against the partition 3. In this way, airflow is prevented from flowing through the gap between the two end surfaces of the heat exchange core 2 along the first direction and the outer shell 1 or the partition 3.

[0159] In one embodiment, please refer to Figures 2 to 7 The heat exchange core 2 extends along the first direction, the supply air chamber 101b and the exhaust air chamber 102b are located on the same side of the heat exchange core 2 along the first direction, the first side wall 11 of the shell 1 along the second direction forms a return air port 1a and a supply air port 1b, the second side wall 12 of the shell 1 along the second direction forms a fresh air port 1c and an exhaust air port 1d, the return air channel 101a is located on the first side of the supply air channel 102a along the third direction, the fresh air channel 103a is located on the first side of the exhaust air channel 104a along the third direction, the supply air chamber 101b is located on one side of the supply air channel 102a along the first direction, and the exhaust air chamber 102b is located on one side of the exhaust air channel 104a along the first direction.

[0160] The return air channel 101a and the supply air channel 102a are both located on the same side of the heat exchange core 2 along the second direction. The fresh air channel 103a and the exhaust air channel 104a are both located on the same side of the heat exchange core 2 along the second direction. In this way, the sum of the dimensions of the supply air chamber 101b and the exhaust air chamber 102b along the second direction can be close to the sum of the dimensions of the return air channel 101a, the fresh air channel 103a and the heat exchange core 2 along the second direction. The sum of the dimensions of the supply air chamber 101b and the exhaust air chamber 102b along the third direction can be close to the dimension of the heat exchange core 2 along the third direction. Other air ducts can also be designed according to the above principles. In this way, there is almost no useless area in the space inside the outer shell 1, and the dimensions of each air duct in the outer shell 1 are relatively large.

[0161] Regarding indoor air flow: the indoor air flow enters the housing 1 from the return air port 1a, flows along the first air flow path X1 in the housing 1, and then is discharged to the outside from the exhaust port 1d. That is, the first air flow path X1 is the return air path of the indoor air flow (see Figure 2). Specifically: the indoor airflow from the return air port 1a enters the return air channel 101a and flows in a curve toward the first side of the third direction, and enters the heat exchange core 2 through the return air inlet surface 2a and flows to the second side. The indoor airflow after heat exchange enters the exhaust channel 104a through the exhaust air outlet surface 2d, and finally enters the exhaust chamber 102b and is discharged through the exhaust port 1d. The indoor airflow flows linearly during the flow process, with almost no airflow dead angle, smooth air path, and small wind resistance.

[0162] For outdoor air flow: the outdoor air flow enters the housing 1 from the fresh air outlet 1c, flows along the second air flow path X2 in the housing 1, and then is discharged to the room from the air supply outlet 1b. That is, the second air flow path X2 is the fresh air path for the outdoor air flow (see Figure 2 ). After the outdoor air from the fresh air outlet 1c enters the fresh air channel 103a, it flows in a curve toward the first side of the third direction, and enters the heat exchange core 2 through the fresh air inlet surface 2c and flows to the second side. The outdoor air after heat exchange enters the air supply channel 102a through the air supply outlet surface 2b, and finally enters the air supply chamber 101b and is discharged through the air supply outlet 1b. The outdoor air flows linearly during the flow process, with almost no airflow dead angle, smooth air path, and small wind resistance.

[0163] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments" or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does 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. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0164] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A fresh air device, characterized in that: include: shell; Heat exchange core; A partition, wherein the partition defines a portion of the space within the shell as a heat exchange chamber, wherein the heat exchange core is located within the heat exchange chamber, and wherein the partition comprises a partition plate, wherein the partition plate connects the heat exchange core and the shell to separate the heat exchange chamber into a return air channel and a supply air channel.

2. The fresh air device according to claim 1, characterized in that: The air supply channel has an air supply chamber on one side along the first direction, the shell has a return air port formed on the first side wall along the second direction, the return air channel is located on the first side of the air supply channel along the third direction, the return air port is connected with the return air channel, and the air supply chamber is connected with the air supply channel, wherein the first direction, the second direction and the third direction are perpendicular to each other.

3. The fresh air device according to claim 2, characterized in that: The partition plate includes a guide plate body, the surface of the guide plate body facing the first side wall is a return air guide surface, and the return air guide surface includes a concave area concave in a direction away from the return air port; Taking a plane perpendicular to the second direction as a projection plane, the projection of the return air outlet is located within the projection range of the recessed area.

4. The fresh air device according to claim 3, characterized in that: The concave area is in the form of a curved surface.

5. The fresh air device according to claim 3, characterized in that: The return air guide surface includes a protruding area protruding toward the first side wall, and the protruding area is located on a side of the recessed area close to the air supply chamber along the first direction.

6. The fresh air device according to claim 3, characterized in that: The fresh air device includes a return air filter located in the return air channel, and the return air filter is located between the return air port and the guide plate body.

7. The fresh air device according to claim 6, characterized in that: The partition plate includes a guide plate body and a supporting plate body, the supporting plate body connects the guide plate body and the guide plate body, one end of the guide plate body is connected to the second side of the return air outlet along the third direction, the other end of the guide plate body extends in a direction away from the return air outlet, and the return air filter is arranged on the supporting plate body.

8. The fresh air device according to claim 2, characterized in that: The air supply channel comprises an expansion section, and the area of ​​the flow cross section of the expansion section increases from a direction away from the air supply chamber to a direction close to the air supply chamber.

9. The fresh air device according to claim 2, characterized in that: The partition member includes a partition plate, a surface of the partition plate is a partial surface of the air supply chamber, one end of the partition plate along the third direction is connected to the partition plate, and a portion of the partition plate protrudes toward the direction close to the partition plate.

10. The fresh air device according to claim 9, characterized in that: The partition member includes a connecting plate, the connecting plate abuts against one side of the heat exchange core along the first direction, and the partition plate and the partition plate are both connected to the connecting plate.

11. The fresh air device according to claim 10, characterized in that: The partition member includes a plug-in member arranged on the partition plate, the plug-in member and the partition plate together define a slot opening toward a first side of the third direction, and a portion of the connecting plate is inserted into the slot.

12. The fresh air device according to claim 2, characterized in that: The first side wall of the housing is formed with an air supply port, and the air supply port is communicated with the air supply chamber.

13. The fresh air device according to any one of claims 1 to 12, characterized in that: The shell is formed with a fresh air inlet and an exhaust outlet, and the partition includes an isolation plate, which 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 connected to the fresh air inlet, and the exhaust outlet is connected to the exhaust air channel.

14. The fresh air device according to any one of claims 1 to 12, characterized in that: The heat exchange core extends along a first direction, and the circumferential surface of the heat exchange core surrounding the first direction includes a return air inlet surface and a supply air outlet surface, the return air inlet surface is a partial surface of the return air channel, and the supply air outlet surface is a partial surface of the supply air channel.

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