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 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 field of air conditioning technology, and in particular to a fresh air equipment. BACKGROUND

[0002] This section is intended to provide background or context to the embodiments of the application. The description herein does not constitute admission that the prior art is prior art nor that the prior art is part of the common general knowledge of those working in the field.

[0003] The fresh air equipment can be used to deliver outdoor airflow to the indoor and exhaust indoor airflow to the outdoor. 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 to the indoor and exhausting indoor turbid air. The shell has outdoor airflow and indoor airflow, and the structure inside the shell needs to be simplified to reduce the overall weight of the fresh air equipment, and the air duct of the outdoor airflow and the indoor airflow in the shell needs to be limited to improve the heat exchange effect. SUMMARY

[0004] Therefore, the present application aims to provide a fresh air equipment which is simple in structure by separating the return air channel and the supply air channel by a partition plate.

[0005] The present application provides a fresh air equipment, comprising:

[0006] a shell;

[0007] a heat exchange core;

[0008] a partition, which limits a part of the space in the shell as a heat exchange cavity, and the heat exchange core is located in the heat exchange cavity, and the partition comprises a partition plate which connects the heat exchange core and the shell to separate the heat exchange cavity into a return air channel and a supply air channel.

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

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

[0011] In some embodiments, the recessed area is an arc surface.

[0012] In some embodiments, the return air guide surface comprises a protruding region protruding towards the first side wall, the protruding region being located on a side of the recessed region close to the air supply chamber in the first direction.

[0013] In some embodiments, the fresh air device comprises a return air filter screen located in the return air passage, the return air filter screen being located between the return air port and the guide plate body.

[0014] In some embodiments, the partition plate comprises a guide plate body and a bearing plate body, the bearing plate body connecting the guide plate body and the guide plate body, one end of the guide plate body being connected to a second side of the return air port in the third direction, the other end of the guide plate body extending away from the return air port, the return air filter screen being arranged on the bearing plate body.

[0015] In some embodiments, the air supply passage comprises an expansion section, the flow cross-sectional area of the expansion section increasing from a direction away from the air supply chamber towards a direction close to the air supply chamber.

[0016] In some embodiments, the partition comprises a partition plate, a surface of the partition plate being part of a surface of the air supply chamber, one end of the partition plate in the third direction being connected to the partition plate, part of the partition plate protruding towards the partition plate.

[0017] In some embodiments, the partition comprises a connecting plate abutting one side of the heat exchange core in the first direction, the partition plate and the partition plate both being connected to the connecting plate.

[0018] In some embodiments, the partition comprises a plug-in part arranged on the partition plate, the plug-in part and the partition plate jointly defining a plug-in slot open to a first side in the third direction, part of the connecting plate being inserted into the plug-in slot.

[0019] In some embodiments, the first side wall of the shell is formed with an air supply port, the air supply port being in communication with the air supply chamber.

[0020] In some embodiments, the shell is formed with a fresh air port and an exhaust air port, the partition comprising an isolation plate, the isolation plate connecting the heat exchange core and the fresh air port to separate the heat exchange cavity into a fresh air passage and an exhaust air passage, the fresh air passage being in communication with the fresh air port, the exhaust air port being in communication with the exhaust air passage.

[0021] In some embodiments, the heat exchange core extends in the first direction, the heat exchange core surrounding a circumferential surface in the first direction comprising a return air inlet surface and an air supply outlet surface, the return air inlet surface being part of a surface of the return air passage, the air supply outlet surface being part of a surface of the air supply passage.

[0022] The fresh air equipment provided in this application embodiment uses a partition plate to separate the heat exchange chamber into independent return air channels and supply air channels. The airflow in the return air channel and the supply air channel will not flow into each other, reducing the probability of mixing of outdoor airflow and indoor airflow and improving the heat exchange effect. The structure is simple by separating the return air channel and the supply air channel with a partition plate. By simplifying the partition plate that limits the air duct, the overall weight of the fresh air equipment can be reduced to a certain extent. Attached Figure Description

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

[0024] Figure 2 for Figure 1 The diagram shows another perspective of the fresh air system with some parts omitted. In this diagram, 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, in which dashed arrows schematically indicate the flow directions of indoor and outdoor airflow;

[0026] Figure 4 for Figure 1 A partial cross-sectional view of the fresh air system shown, in which the dashed arrows schematically indicate the direction of outdoor airflow within the air supply duct;

[0027] Figure 5 for Figure 1 A schematic diagram of part of the structure of the fresh air system shown;

[0028] Figure 6 This is a schematic diagram of a first type of separator in one embodiment of this application;

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

[0030] Figure 8 This is a schematic diagram of the structure of the second type of separator in one embodiment of this application;

[0031] Figure 9 This is an exploded view of part of the structure of the second type of separator;

[0032] Figure 10 for Figure 9 Enlarged diagram of point A in the middle.

[0033] Explanation of reference numerals in the attached figures

[0034] Housing 1; first side wall 11; second side wall 12; bottom disc 13; cover body 14; heat exchange cavity 10a; return air passage 101a; supply air passage 102a; expansion section 102a'; steady flow section 102a"; fresh air passage 103a; exhaust air passage 104a; return air outlet 1a; supply air outlet 1b; fresh air outlet 1c; exhaust air outlet 1d; fan cavity 10b; supply air chamber 101b; exhaust air chamber 102b;

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

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

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

[0038] In the case of no conflict, the embodiments in the application and the technical features in the embodiments can be combined with each other, and the detailed description in the specific embodiments should be understood as the explanation and description of the purpose of the application, and should not be regarded as improper limitation of the application.

[0039] It should be noted that in the embodiments of the application, down refers to the direction of the ground, and up is opposite to down; the first direction, the second direction and the third direction form a three-dimensional vertical coordinate system, and the first side of the third direction and the second side of the third direction are opposite directions. In the embodiments of the application, the first direction, the second direction and the third direction are based on the orientation or positional relationship shown in the drawings. It should be understood that these orientation terms are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application. The application will be further described in detail below in combination with the drawings and specific embodiments.

[0040] Please refer to Figures 1 to 10The embodiment of the present application provides a fresh air equipment, the fresh air equipment includes a shell 1, a heat exchange core 2 and a partition 3, the partition 1 is defined as a heat exchange cavity 10a in the space in the shell 1, 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 is connected with the heat exchange core 2 and the shell 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 part of the surface of the return air channel 101a and part of the surface of the supply air channel 102a respectively.

[0041] The indoor airflow is usually also called return air, and the outdoor airflow is usually also called fresh air. The fresh air equipment realizes the fresh air function and the exhaust air function, and 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 that the outdoor fresh air enters the indoor, and the exhaust air function is the function that the indoor dirty air is discharged to the outdoor.

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

[0043] The return air channel 101a and the supply air channel 102a are independent of each other, that is, the indoor airflow of the return air channel 101a does not enter the supply air channel 102a, the outdoor airflow in the supply air channel 102a does not enter the return air channel 101a, and the return air channel 101a and the supply air channel 102a do not flow gas.

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

[0045] The fresh air equipment provided by the embodiment of the present application separates the heat exchange cavity 10a into the return air channel 101a and the supply air channel 102a which are independent of each other by the partition plate 31, the airflow in the return air channel 101a and the supply air channel 102a does not flow into each other, the probability that the outdoor airflow and the indoor airflow are mixed is reduced, the heat exchange effect is improved, the return air channel 101a and the supply air channel 102a are separated by one partition plate 31, the structure is simple, and by simplifying the partition plate 31 for limiting the air duct, the overall weight of the fresh air equipment can be reduced to a certain extent.

[0046] The fresh air equipment provided in the embodiments of the present application can be installed to a ceiling or a suspended ceiling. The suspended ceiling can separate an indoor space into a suspended space and a living space. A user performs daily life in the living space, and the suspended space is not only used for beautifying indoor decoration, but also used for installing other equipment. In an embodiment, the fresh air equipment is arranged in the suspended space. In this way, the fresh air equipment is hidden in the suspended space, avoiding the user from directly observing the whole fresh air equipment, and improving visual aesthetics. It can be understood that the indoor space includes but is not limited to a balcony, a bathroom, a kitchen and the like, and can be a large-sized house, a small-sized house or other types of production or living environment.

[0047] In the case that the fresh air equipment provided in the embodiments of the present application is assembled in the ceiling or the suspended ceiling, the third direction is consistent with the up-down direction, the first side of the third direction can be the lower side, and the second side of the third direction can be the upper side. Taking the case that the outer shell 1 is substantially hexahedral as an example, the third direction can be the thickness direction of the outer shell 1, one of the first direction and the second direction can be the width direction of the outer shell 1, and the other of the first direction and the second direction can be the length direction of the outer shell 1. Taking the case that the fresh air equipment is assembled in the suspended space as an example, the size of the suspended space along the up-down direction is much smaller than the size of the suspended space along the first direction and the second direction, and the thickness direction of the outer shell 1 is along the up-down direction, so that the fresh air equipment is conveniently assembled to the suspended space.

[0048] The overall size of the fresh air equipment in the related art is relatively large, the overall machine is heavy, the installation space for installing the fresh air equipment is limited, for example, the fresh air equipment is usually only applicable to large-sized houses and / or scenes in which the balcony suspended space is large, in addition, the overall size of the fresh air equipment in the related art is relatively large, resulting in small maintenance space, so that the fresh air equipment is inconvenient to maintain, and the difficulty of after-sales maintenance is increased. If the overall size of the fresh air equipment is reduced, the size of the heat exchange core and / or the air duct of the fresh air equipment is reduced, resulting in reduced heat exchange efficiency, and performance problems such as large pressure loss, small air volume, high energy consumption, large noise and the like caused by the sharp change of the air path due to the size reduction of the components of the air duct. In some cases, the overall size of the fresh air equipment in the related art is large, and the plate member for isolating the air duct is in the form of a flat plate, the flat plate is usually perpendicular to the bottom plate of the outer shell, the plate member for isolating the air duct does not have the function of guiding flow, and also causes the air duct to include many 90° turns, increases the useless area in the outer shell, and causes waste of space in the outer shell; the flow direction of indoor air and outdoor air is usually curved, so that vortexes appear at the intersection corners of each plate member and the bottom plate, for example, at the 90° turns, affecting the heat exchange efficiency, increasing the pressure loss of the whole heat exchange process, and the unsmooth air path also increases the motor load of the fresh air equipment, thereby increasing the rotating speed, and increasing the noise and vibration of the machine.

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

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

[0051] The air return opening 1a is in communication with the air return passage 101a and the outside, and the air return opening 1a is used to introduce indoor air flow into the air return passage 101a.

[0052] The two surfaces of the partition plate 31 in the thickness direction are respectively part of the surface of the air return passage 101a and part of the surface of the air supply passage 102a, the indoor air flow enters the air return passage 101a along the second direction, and the indoor air flow flows along the surface of the partition plate 31 towards the first side, and the partition plate 31 plays a role of air guide.

[0053] In this embodiment, the indoor air flow enters the air return passage 101a through the air return opening 1a and flows to the heat exchange core 2, and the outdoor air flow from the heat exchange core 2 enters the air supply chamber 101b through the air supply passage 102a. The air return passage 101a and the air supply passage 102a are distributed along the third direction, which can reduce the size occupied by the air return passage 101a and the air supply passage 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 passage 102a in the first direction, the sum of the sizes of the air return passage 101a and the air supply passage 102a in the third direction can be substantially equal to the size of the air supply chamber 101b in the third direction, and the air return passage 101a, the air supply passage 102a and the air supply chamber 101b are arranged in two directions respectively, so that the volume of the air return passage 101a, the air supply passage 102a and the air supply chamber 101b can be relatively large without increasing the overall size of the shell 1 or the overall size of the shell 1 is relatively small, and the resistance on the air flow circulation path can be relatively small. The indoor air flow enters the air return passage 101a along the second direction, and the indoor air flow flows along the surface of the partition plate 31 towards the heat exchange core 2, and the partition plate 31 plays a role of air guide. The indoor air flow from the air return opening 1a can enter the air return passage 101a without a large angle, for example, 90° turn, thereby reducing the resistance in the process of indoor air flow and reducing the noise. The outdoor air flow flows in the air supply passage 102a along the first direction and enters the air supply chamber 101b. In this way, the outdoor air flow does not need to turn 90°, the air path is smooth, the air resistance is small, and the loss is small.

[0054] For the convenience of description, the two side walls of the shell 1 opposite in the second direction are defined as a first side wall 11 and a second side wall 12 respectively. For example, please refer to Figures 1 to 3 The fresh air outlet 1c can be formed on the second side wall 12.

[0055] In some embodiments, please refer to Figures 1 to 3 The side wall of the second side of the shell 1 in the third direction is a bottom plate 13. That is, the bottom plate 13 can be upward, i.e., toward the ceiling.

[0056] In some embodiments, please refer to Figures 1 to 3 The side wall of the first side of the shell 1 in the third direction can be a cover 14, and the outer side of the cover 14 can be provided with an access plate. In this way, the cover 14 is formed with a taking and placing opening, and the access plate is used to open or shield the taking and placing opening, so that the operating personnel can open the access plate from below, take and place the devices in the shell 1 such as the return air filter screen 4 through the taking and placing opening to maintain the devices in the shell 1.

[0057] The position where the partition plate 31 connects the shell 1 is not limited. For example, the partition plate 31 can be connected at the return air outlet 1a, or the partition plate 31 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 bottom plate 13. For another example, the partition plate 31 can be connected to the part of the bottom plate 13 close to the first side wall 11.

[0058] In an embodiment, please refer to Figures 1 to 2 The first side wall 11 of the shell 1 is formed with a supply air outlet 1b, and the supply air outlet 1b is in communication with the supply air chamber 101b. The supply air outlet 1b is in communication with the outside and the supply air chamber 101b, and is used to guide the outdoor airflow in the shell 1 out of the shell 1.

[0059] In this embodiment, the outdoor airflow in the supply air chamber 101b is discharged to the indoor through the supply air outlet 1b to realize the fresh air function. The supply air outlet 1b and the return air outlet 1a are located on the same side wall of the shell 1 in the second direction, which can avoid the increase of the size of the whole machine caused by the supply air outlet 1b and the return air outlet 1a being located on two different side walls of the shell 1.

[0060] Please refer to Figure 2 The supply air chamber 101b is used to install a supply air fan 5. The supply air fan 5 drives the fresh air flow, i.e., drives the outdoor airflow to flow.

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

[0062] In an example, the centrifugal fan includes a fan housing and a fan wheel. The fan wheel is located in the fan housing. The fan wheel rotates to drive air flow. The fan housing guides the air flow. The axis of the fan wheel and the axis of the fan housing can both extend along the first direction. In this way, the radial dimension of the fan wheel and the fan housing can be increased without increasing the dimension of the housing 1 along the first direction.

[0063] In an example, the fan housing is a volute.

[0064] In an example, the fan housing includes two air inlets on two sides of the fan housing along the first direction. The fan housing includes an air outlet on the circumferential surface of the fan housing along the first direction. Air enters the fan housing through the two air inlets and exits the fan housing through the air outlet.

[0065] For the sake of description, the fan housing of the air supply fan 5 is defined as an air supply housing. In an example, one air inlet of the air supply housing faces the outlet of the air supply passage 102a. The air outlet of the air supply housing is in communication with the air supply port 1b. Air in the air supply chamber 101b enters the air supply housing through the two air inlets of the air supply housing and exits the air supply housing through the air outlet of the air supply housing. The length direction of the air supply passage 102a extends along the first direction. Air in the air supply passage 102a converges into the air supply chamber 101b along the first direction and then enters the air supply housing along the first direction. In this way, the air flow can not make a large angle, for example, 90° turn during the flow process, thereby reducing the air resistance, reducing the vortex, and reducing the noise.

[0066] In an example, the air outlet of the air supply housing is aligned with the air supply port 1b. That is, the air outlet of the air supply housing and the air supply port 1b have similar size and shape. The projection of the air outlet of the air supply housing and the projection of the air supply port 1b at least partially overlap in a plane perpendicular to the second direction.

[0067] In an example, the projection of the air inlet of the air supply housing facing the air supply passage 102a and the projection of the outlet of the air supply passage 102a at least partially overlap in a plane perpendicular to the first direction. In this way, the air resistance is reduced.

[0068] In an example, referring 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. The return air guide surface 311a includes a recessed area 311aa recessed away from the return air port 1a. The projection of the return air port 1a is located in the projection range of the recessed area 311aa in a plane perpendicular to the second direction.

[0069] In this embodiment, the air return guide surface 311a is part of the surface of the air return passage 101a. The air flow from the air return port 1a is large, and the projection of the air return port 1a in a plane perpendicular to the second direction is within the projection range of the recessed area 311aa. The recessed area 311aa increases the space of the air return passage 101a corresponding to the area of the air return port 1a, reduces the wind speed of the indoor air flow, and thus reduces the friction noise between the indoor air flow and the air return guide surface 311a.

[0070] In some embodiments, referring to Figures 2 to 7 , the partial air guide plate body 311 can be curved away from the air return port 1a to form a recessed area 311aa. That is, the part of the air guide plate body 311 corresponding to the recessed area 311aa occupies the space of the air supply passage 102a. In this way, the thickness of the part of the air guide plate body 311 corresponding to the recessed area 311aa does not need to be thinned, the structural strength of the air guide plate body 311 is good, the outdoor air flow of the part of the air supply passage 102a corresponding to the recessed area 311aa is small, the required air supply space is relatively small, and the part of the air guide plate body 311 corresponding to the recessed area 311aa occupies the space of the air supply passage 102a, which does not increase the resistance of the air supply passage 102a; and the effect of balancing the air return passage 101a and the air supply passage 102a can be achieved.

[0071] In an embodiment, referring to Figure 2 and Figure 7 , the recessed area 311aa is arc-shaped. For example, the recessed area 311aa can be circularly arc-shaped. By arc-shaped guiding, the probability of vortex flow of the indoor air flow is reduced, and the noise generated by the collision between the indoor air flow and the air guide plate body 311 is further reduced.

[0072] In an embodiment, referring to Figures 2 to 7 , the air return guide surface 311a includes a protruding area 311ab protruding towards the first side wall 11. The protruding area 311ab is located on the side of the recessed area 311aa close to the air supply chamber 101b along the first direction. That is, the cross-sectional area of the flow passage of the air return passage 101a corresponding to the protruding area 311ab is relatively small. The indoor air flow from the air return port 1a is divided towards the air supply chamber 101b, the air flow at the position of the air return passage 101a away from the recessed area 311aa is relatively small, and the cross-sectional area of the flow passage of the air return passage 101a corresponding to the protruding area 311ab is relatively small and will not excessively increase the wind speed, which will not excessively increase the friction noise between the indoor air flow and the air guide plate body 311.

[0073] It should be noted that the flow cross-section refers to a cross-section taken perpendicular to a flow line cluster, such as air flow.

[0074] In an embodiment, the portion of the deflector body 311 corresponding to the protruding region 311ab occupies the space of the return air passage 101a. The indoor air flow volume corresponding to the portion of the return air passage 101a corresponding to the protruding region 311ab is small, and the required space is relatively small. The portion of the deflector body 311 corresponding to the protruding region 311ab occupies the space of the return air passage 101a, and does not increase the resistance of the return air passage 101a. The outdoor air flow volume corresponding to the portion of the supply air passage 102a corresponding to the protruding region 311ab is large. The protruding region 311ab can increase the space of the portion of the supply air passage 102a corresponding to the protruding region 311ab, so as to reduce the friction noise between the outdoor air flow and the portion of the supply air passage 102a corresponding to the protruding region 311ab. In this way, the effect of balancing the return air passage 101a and the supply air passage 102a can be achieved.

[0075] In some embodiments, the recessed region 311aa and the protruding region 311ab are smoothly transitioned. That is, the return air deflector surface 311a is streamlined, and the indoor air flow can adhere to the return air deflector surface 311a to flow to the heat exchange core 2 on the first side of the third direction, guiding and flowing the indoor air flow, reducing the vortex caused by the vertical surface in the related art, avoiding wind resistance caused by the existence of the corner, and obviously reducing the noise effect, and accordingly reducing 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 an embodiment, referring to Figure 4 , the supply air passage 102a includes an expansion section 102a'. The flow area of the expansion section 102a' increases from the direction away from the supply air chamber 101b to the direction close to the supply air chamber 101b. The supply air chamber 101b is located downstream of the supply air passage 102a. The wind volume of the supply air passage 102a close to the supply air chamber 101b is larger, and the required space is larger. The flow area of the expansion section 102a' increases from the direction away from the supply air chamber 101b to the direction close to the supply air chamber 101b, so as to reduce the friction noise between the outdoor air flow and the surface of the expansion section 102a'.

[0077] In some embodiments, referring to Figure 4 and Figure 7 , the portion of the supply air passage 102a corresponding to the protruding region 311ab can be the expansion section 102a'.

[0078] In an embodiment, referring to Figure 4 and Figure 7 , the supply air passage 102a includes a flow stabilizing section 102a". The flow stabilizing section 102a" is located on the side of the expansion section 102a' away from the supply air chamber 101b along the first direction. The maximum flow area of the flow stabilizing section 102a" is not greater than the minimum flow area of the expansion section 102a'. In some embodiments, the portion of the supply air passage 102a corresponding to the recessed region 311aa can be the flow stabilizing section 102a".

[0079] In an embodiment, referring to Figures 2 to 8 , the partition 3 comprises a partition plate 32, a surface of the partition plate 32 is part of a surface of the air supply chamber 101b, the partition plate 32 is connected to the partition plate 31 along one end of the third direction, and part of the partition plate 32 protrudes towards the partition plate 31. A surface of the partition plate 32 away from the heat exchange cavity 10a along the first direction is part of a surface of the air supply chamber 101b. The outdoor air flow is concentrated into 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 passage 102a and the air supply chamber 101b, and part of the partition plate 32 protrudes towards the partition plate 31, which not only enlarges the volume of the air supply chamber 101b, thereby increasing the space of the air supply chamber 101b and reducing the air speed in the air supply chamber 101b, but also reduces the local vortex and air flow stagnation area, improves the gas turbulence, and achieves the effect of reducing noise.

[0080] In an embodiment, part of the partition plate 32 protrudes towards the partition plate 31 to form a wind guide part, and the surface of the wind guide part constituting the air supply chamber 101b can be a flared curved surface. The air flow from the air supply passage 102a can flow smoothly along the flared curved surface of the wind guide part towards the first side of the third direction, and the flared curved surface can guide the originally blocked air flow to the air supply fan 5, thereby reducing the air flow dead angle and vortex.

[0081] In an embodiment, referring to Figures 5 to 8 , the partition 3 comprises a connecting plate 33 abutting 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] Part of a surface of the connecting plate 33 away from the heat exchange core 2 along the first direction is part of a 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 one side of the heat exchange core 2 along the first direction, so that the air flow flows through the heat exchange core 2, and the air flow can be prevented from flowing through the gap between the connecting plate 33 and the heat exchange core 2.

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

[0084] In some embodiments, the connecting plate 33 and the partition plate 32 can also be an integrally formed structure. In this way, the assembly process is reduced.

[0085] In an embodiment, referring to Figures 8 to 10 , the partition 3 comprises a plug-in part 34 arranged on the partition plate 31, the plug-in part 34 and the partition plate 32 jointly define a plug-in slot 34a open towards the first side of the third direction, and part of the connecting plate 33 is inserted into the plug-in 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 slot wall surface of the slot 34a can position and limit the connecting plate 33, so that the installation of the connecting plate 33 is more simple and efficient, and the assembly efficiency is improved.

[0087] In an embodiment, referring to Figures 8 to 10 , the connecting plate 33 includes a main plate body 331 and a folded edge 332, the main plate body 331 is formed with a limiting slot opening towards the partition plate 32, and the folded edge 332 is connected with the main plate body 331 and is bent towards one side of the first direction, the plug-in part 34 includes a limiting block 341, the limiting block 341 is arranged on one side of the partition plate 32 along the second direction to form the slot 34a, part of the partition plate 32 is arranged in the limiting slot, 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 slot and the slot 34a.

[0088] In an embodiment, referring to Figures 2 to 7 , the fresh air equipment includes the return air filter screen 4 located in the return air passage 101a, and the return air filter screen 4 is located between the return air inlet 1a and the flow guide plate body 311. The indoor airflow from the return air inlet 1a passes through the return air filter screen 4 for filtration, and then is guided by the flow guide plate body 311 to the heat exchange core 2. The return air filter screen 4 is used for filtering the airflow to improve the cleanliness of the airflow, so that the heat exchange core 2 remains clean and the service life of the heat exchange core 2 is prolonged.

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

[0090] Exemplarily, the return air filter screen 4 can filter dust, lint or paper scraps and other impurities carried by the indoor airflow, and 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 screen 4 can include but is not limited to a primary efficiency filter screen. The primary efficiency filter screen is mainly used for filtering impurities above 5 microns.

[0091] In some embodiments, the return air filter screen 4 can be fixed to 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 screen 4.

[0092] In some embodiments, referring to Figures 2 to 8The partition 3 is provided with a guide groove 3a, and the end of the return air filter screen 4 in the first direction is located in the guide groove 3a. For example, the partition plate 32 is provided with the guide groove 3a on the surface forming the return air passage 101a. In an example, the return air filter screen 4 can be inserted into the guide groove 3a from the third direction to complete the positioning and assembly of the return air filter screen 4, which is simple to operate.

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

[0094] In some embodiments, at least one side surface of the return air passage 101a in the first direction is provided with the guide groove 3a.

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

[0096] In some embodiments, the buckle includes two elastic arms provided in the guide groove 3a, and the two elastic arms are located on both sides of the thickness direction of the return air filter screen 4 to clamp the return air filter screen 4. In this way, the return air filter screen 4 is inserted into the guide groove 3a in the third direction to a preset position, the elastic arms clamp the return air filter screen 4, the fixed installation of the return air filter screen 4 is completed, the operation is simple, and the return air filter screen 4 is convenient to disassemble and assemble.

[0097] In an embodiment, please refer to Figures 2 to 8 The partition plate 31 includes a drainage plate body 312 and a bearing plate body 313, the bearing plate body 313 is connected with the drainage plate body 312 and the guide plate body 311, one end of the drainage plate body 312 is connected with the second side of the return air inlet 1a in the third direction, and the other end of the drainage plate body 312 extends in a direction away from the return air inlet 1a. The return air filter screen 4 is arranged on the bearing plate body 313. The included angle between the drainage plate body 312 and the return air filter screen 4 is obtuse, the drainage plate body 312 is inclined towards the return air inlet 1a, the indoor airflow from the return air inlet 1a flows to the return air filter screen 4 through the drainage plate body 312 towards the first side of the third direction, so as to reduce the airflow resistance and reduce the probability of vortex.

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

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

[0100] In an embodiment, referring to Figures 2 to 8 The partition plate 31 includes a folded plate body 314 connected to 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 airflow to flow to the return air inlet face 2a.

[0101] In an embodiment, referring to Figures 2 to 8 The shell 1 is formed with a fresh air inlet 1c and an exhaust air outlet 1d, and the partition 3 includes a separation plate 35 connected to the heat exchange core 2 and the fresh air inlet 1c to separate the heat exchange cavity 10a into a fresh air passage 103a and an exhaust air passage 104a. The fresh air passage 103a communicates with the fresh air inlet 1c, and the exhaust air outlet 1d communicates with the exhaust air passage 104a. The two surfaces of the separation plate 35 in the thickness direction are respectively part of the surface of the fresh air passage 103a and part of the surface of the exhaust air passage 104a.

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

[0103] The exhaust air outlet 1d communicates the exhaust air passage 104a with the outside, and the exhaust air outlet 1d is used to exhaust the outdoor airflow out of the shell 1. The exhaust air passage 104a is used to transport the outdoor airflow to the exhaust air outlet 1d, and the indoor airflow is transported to the outdoor environment through the exhaust air passage 104a and the exhaust air outlet 1d. That is, the exhaust air passage 104a is used to transport the indoor airflow after heat exchange.

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

[0105] For example, the flow path of the indoor airflow is: the return air inlet 1a, the return air passage 101a, the heat exchange core 2, the exhaust air passage 104a, and the exhaust air outlet 1d. The flow path of the outdoor airflow is: the fresh air inlet 1c, the fresh air passage 103a, the heat exchange core 2, the supply air passage 102a, and the supply air outlet 1b. The indoor airflow and the outdoor airflow are exchanged in the heat exchange core 2.

[0106] In this embodiment, the isolation plate 35 separates the heat exchange cavity 10a into the independent fresh air channel 103a and the exhaust air channel 104a, the air flow in the fresh air channel 103a and the exhaust air channel 104a cannot flow into each other, reducing the probability of mixing of outdoor air flow and indoor air flow, improving the heat exchange effect, separating the fresh air channel 103a and the exhaust air channel 104a by one isolation plate 35, simple structure, by simplifying the isolation plate 35 that defines the air duct, the overall weight of the fresh air equipment can be reduced to a certain extent.

[0107] In one embodiment, referring 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 around the first direction includes the return air inlet surface 2a and the supply air outlet surface 2b. The return air inlet surface 2a is part of the surface of the return air channel 101a, and the supply air outlet surface 2b is part of the surface of the supply air channel 102a.

[0108] The heat exchange core 2 extends along the first direction means that the air flow enters or flows out of the heat exchange core 2 from the circumferential surface around the first direction. For example, the heat exchange core 2 extending along the first direction can be that a plurality of heat exchange medium sheets of the heat exchange core 2 are spaced and stacked along the first direction. The heat exchange medium sheet is used for heat exchange between indoor air flow and outdoor air flow. Adjacent two heat exchange medium sheets form a spacing space. Adjacent two spacing spaces can respectively flow indoor air flow and outdoor air flow, and the indoor air flow and the outdoor air flow exchange heat through the heat exchange medium sheet. That is, the indoor air flow and the outdoor air flow enter and exit the heat exchange core 2 from the circumferential surface of the heat exchange core 2 around the first direction. The heat exchange medium sheet can be used for heat exchange but not for air flow.

[0109] The return air inlet surface 2a is the surface through which the indoor air flow enters the heat exchange core 2. The supply air outlet surface 2b is the surface through which the outdoor air flow exits the heat exchange core 2. The indoor air flow in the return air channel 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 channel 102a through the supply air outlet surface 2b.

[0110] If the heat exchange core 2 extends along the third direction, that is, a plurality of heat exchange medium sheets are stacked along the third direction, the thickness of the shell 1 along the up-down direction will be greatly increased, which will cause the whole machine to be difficult to assemble into an installation space with a small height along the up-down 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 along the up-down direction, the number of heat exchange medium sheets will be too small or the spacing space will be too small, which will result in poor heat exchange effect.

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

[0112] In this embodiment, the heat exchange core 2 extends along the first direction when the shell 1 is limited in the third direction, and the number of heat exchange medium sheets can be relatively large and / or the spacing space can be relatively large, and the heat exchange effect is good. The return air passage 101a and the supply air passage 102a are located on the circumferential side of the heat exchange core 2 along the first direction, so as to facilitate the smooth flow of indoor air and outdoor air, reduce vortex, and improve the heat exchange efficiency. The return air inlet face 2a is part of the surface of the return air passage 101a, and the supply air outlet face 2b is part of the surface of the supply air passage 102a. This facilitates the flow of air between the air duct and the heat exchange core 2, and reduces the obstruction.

[0113] In some embodiments, the heat exchange core 2 includes a framework for assembling the heat exchange medium sheets to maintain the spacing space between two adjacent heat exchange medium sheets.

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

[0115] In some embodiments, referring to Figure 5 , the partition 3 divides the space in the shell 1 into the heat exchange cavity 10a and the fan cavity 10b. By dividing the space in the shell 1 through the partition 3, the air duct in the shell 1 is defined.

[0116] In some embodiments, referring to Figure 2 and Figure 5 , the fan cavity 10b includes a supply air chamber 101b and an exhaust air chamber 102b which are independent of each other, and the exhaust air passage 104a communicates with the exhaust air chamber 102b.

[0117] The exhaust air chamber 102b is used for installing the exhaust air fan 6. The exhaust air fan 6 drives the return air flow, i.e., drives the indoor air flow.

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

[0119] In this embodiment, for the indoor air flow: the indoor air flow enters the return air passage 101a through the return air inlet 1a and enters the heat exchange core 2, and the heat-exchanged indoor air flow enters the exhaust air passage 104a and the exhaust air chamber 102b in turn, and is discharged to the outdoor through the exhaust air outlet 1d. For the outdoor air flow: the outdoor air flow enters the fresh air passage 103a through the fresh air inlet 1c and enters the heat exchange core 2, and the heat-exchanged outdoor air flow enters the supply air passage 102a and the supply air chamber 101b in turn, and is discharged to the indoor through the supply air outlet 1b.

[0120] In an embodiment, referring to Figures 2 to 5The air exhaust chamber 102b is located on one side of the air exhaust passage 104a along the first direction. Specifically, the air exhaust passage 104a communicates with the air exhaust chamber 102b near the outlet of the air exhaust chamber 102b along the first direction. The outdoor airflow flows in the air exhaust passage 104a along the first direction and enters the air exhaust chamber 102b. In this way, the outdoor airflow does not need to make a 90° turn, the air path is smooth, the air resistance is small, and the loss is small.

[0121] Some embodiments, referring to Figure 2 and Figure 5 The fresh air equipment comprises a partition plate 7, and the partition plate 7 divides the fan cavity 10b into the air supply chamber 101b and the air exhaust chamber 102b which are independent of each other.

[0122] The partition plate 7 can be fixed to at least one of the partition 3 and the shell 1. The fixing modes include but are not limited to detachable connection and non-detachable connection. For example, the partition plate 7 and the partition 3 can be connected by fasteners; the partition plate 7 and the shell 1 can be connected by fasteners.

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

[0124] Some embodiments, referring to Figures 2 to 5 The heat exchange core 2 extends along the first direction, the air supply chamber 101b and the air exhaust chamber 102b are arranged along the second direction and are located on the same side of the heat exchange core 2 along the first direction. That is, the air supply fan 5 and the air exhaust fan 6 are arranged along the second direction and are located on the same side of the heat exchange core 2 along the first direction. The fan cavity 10b and the heat exchange core 2 are arranged in a T shape, so that the air flow in the shell 1 is more smooth, and the effects of large air volume, low energy consumption and quietness are achieved.

[0125] In this embodiment, if the air supply chamber 101b and the air 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 air exhaust chamber 102b respectively occupy the space along the first direction in the shell 1, so that the size of the shell 1 along the first direction increases; if the air supply chamber 101b and the air exhaust chamber 102b are located on the same side of the heat exchange core 2 along the first direction, the air supply chamber 101b and the air exhaust chamber 102b will not increase the size of the shell 1 along the first direction, and the air supply chamber 101b, the air exhaust chamber 102b and the heat exchange core 2 are compact in structure. The air supply chamber 101b and the air exhaust chamber 102b are arranged along the second direction, the space along the second direction in the shell 1 is fully utilized, and the space along the first direction and the second direction in the shell 1 is comprehensively considered, so that the overall size of the fresh air equipment is reduced, and the miniaturization requirement is met.

[0126] An embodiment, referring to Figure 2 The axis of the air supply fan 5 and the axis of the air exhaust fan 6 both extend along the first direction.

[0127] The larger the radial dimension of the air supply fan 5 and the air exhaust fan 6, the larger the air volume of the air supply fan 5 and the air exhaust fan 6; conversely, the smaller the radial dimension of the air supply fan 5 and the air exhaust fan 6, the smaller the air volume of the air supply fan 5 and the air exhaust fan 6. Taking the case where the third direction is consistent with the up-down direction as an example, if the axes of the air supply fan 5 and the air exhaust fan 6 extend along the third direction, that is, the air supply fan 5 and the air exhaust fan 6 are arranged in a lying manner on the chassis 13 of the housing 1 along the third direction, increasing the radial dimension of the air supply fan 5 and the air exhaust fan 6 will result in an excessively large overall size, and if the radial dimension of the air supply fan 5 and the air exhaust fan 6 is reduced in order to reduce the overall size, the air volume of the air supply fan 5 will be excessively small. In other words, if the air supply fan 5 and the air exhaust fan 6 are arranged in a lying manner on the chassis 13 of the housing 1 along the third direction, in the case where the radial dimension of the air supply fan 5 and the air exhaust fan 6 is large, the dimension along the first direction will be excessively large, which is not conducive to product miniaturization.

[0128] In this embodiment, the axes of the air supply fan 5 and the air exhaust fan 6 extend along the first direction, that is, the air supply fan 5 and the air exhaust fan 6 are arranged in a standing manner on the chassis 13 of the housing 1, and in the case where the radial dimension of the air supply fan 5 and the air exhaust fan 6 is large, the air supply fan 5 and the air exhaust fan 6 will not excessively increase the dimension of the overall machine along the first direction, the volume occupied by the air supply fan 5 and the air exhaust fan 6 is reduced, the structural layout is more reasonable, and the overall machine has a smaller volume.

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

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

[0131] For ease of description, the fan casing of the air exhaust fan 6 is defined as an air exhaust casing. In an embodiment, one air flow inlet of the air exhaust casing faces the outlet of the air exhaust passage 104a, and the air flow outlet of the air exhaust casing is in communication with the air exhaust port 1d. The air flow in the air exhaust chamber 102b enters the air exhaust casing through the two air flow inlets of the air exhaust casing, and then flows out to the air exhaust port 1d through the air flow outlet. The length direction of the air exhaust passage 104a extends along the first direction, and the air flow in the air exhaust passage 104a converges into the air exhaust chamber 102b along the first direction, and then enters the air exhaust casing along the first direction, which can reduce the large-angle, for example, 90°, turning during the flow of indoor air flow, thereby reducing air resistance, reducing vortex, and reducing noise.

[0132] In an embodiment, the air outlet of the air outlet casing is aligned with and communicates with the air outlet 1d. That is, the air outlet of the air outlet casing is similar in size and shape to the air outlet 1d. The projection of the air outlet of the air outlet casing and the projection of the air outlet 1d at least partially overlap in a plane perpendicular to the second direction.

[0133] In an embodiment, referring to Figures 2 to 5 , the housing 1 is provided with the air return opening 1a and the fresh air opening 1c on the two opposite side walls along the second direction respectively, and the heat exchange core 2 surrounds the circumferential surface along the first direction and includes the air return inlet surface 2a and the fresh air inlet surface 2c, and the air return inlet surface 2a is located on the side of the fresh air inlet surface 2c close to the air return opening 1a. Specifically, the fresh air inlet surface 2c is located on the side of the air return inlet surface 2a close to the fresh air opening 1c.

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

[0135] In this embodiment, the indoor air from the air return opening 1a enters the heat exchange core 2 through the air return inlet surface 2a, and the outdoor air from the fresh air opening 1c enters the heat exchange core 2 through the fresh air inlet surface 2c. The indoor air and the outdoor air enter the heat exchange core 2 from the two opposite sides along the second direction. On the one hand, the air return opening 1a and the air return inlet surface 2a are opposite to each other, and the fresh air opening 1c and the fresh air inlet surface 2c are opposite to each other, which can reduce the 90° turning during the flow of the air, make the air path smoother, reduce the vortex and the wind noise generated, and have the characteristics of large air volume, low energy consumption, and small noise. On the other hand, the heat exchange time of the indoor air and the outdoor air in the heat exchange core 2 can be prolonged, and the heat exchange efficiency can be improved.

[0136] In an embodiment, referring to Figure 3 , the air return inlet surface 2a is inclined towards the air return opening 1a. That is, the angle between the air return inlet surface 2a and the plane on which the air return opening 1a is located is approximately an acute angle. In this way, the indoor air from the air return opening 1a can smoothly enter the air return inlet surface 2a.

[0137] In an embodiment, referring to Figure 3 , the fresh air inlet surface 2c is inclined towards the fresh air opening 1c. That is, the angle between the fresh air inlet surface 2c and the plane on which the fresh air opening 1c is located is approximately an acute angle. In this way, the indoor air from the fresh air opening 1c can smoothly enter the fresh air inlet surface 2c.

[0138] In an embodiment, referring to Figures 1 to 5 , the housing 1 is provided with the air return opening 1a and the air supply opening 1b on the first side wall 11 along the second direction, and is provided with the fresh air opening 1c and the air outlet 1d on the second side wall 12 along the second direction. The air outlet of the air supply fan 5 communicates with the air supply opening 1b, and the air outlet of the air outlet fan 6 communicates with the air outlet 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 outlet 1b and the exhaust air outlet 1d are located on both sides of the fan cavity 10b along the second direction. On the one hand, the return air inlet 1a, the supply air outlet 1b, the fresh air inlet 1c and the exhaust air outlet 1d are externally connected to the air guide pipe, avoiding interference between the air guide pipe and the ceiling plate and the ceiling, and also avoiding the problem of excessive size caused by the two or more side walls of the shell 1 forming the above air inlets; on the other hand, the indoor airflow and the outdoor airflow flow smoothly in the shell 1, which can reduce the vortex.

[0140] In some embodiments, referring to Figures 1 to 5 , at least one of the return air inlet 1a, the supply air outlet 1b, the fresh air inlet 1c and the exhaust air outlet 1d is provided with a flange 8. The flange 8 is used to externally connect the air guide pipe.

[0141] In an embodiment, referring to Figures 2 to 3 , the heat exchange core 2 surrounds the circumferential surface of the first direction, including 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. 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 sequentially connected.

[0142] The exhaust air outlet surface 2d is the surface through which the indoor airflow is discharged from the heat exchange core 2. The supply air outlet surface 2b is the surface through which the outdoor airflow is discharged from the heat exchange core 2.

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

[0144] The indoor airflow before heat exchange enters the heat exchange core 2 through the return air inlet surface 2a, and the indoor airflow 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 sequentially connected, and in the planar projection perpendicular to the first direction, 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 together form a projection approximately in the shape of a quadrilateral. That is, the cross section of the heat exchange core 2 is approximately in the shape of a quadrilateral, for example, a regular quadrilateral, with the planar section perpendicular to the first direction as the cross section. Compared with the heat exchange core with a cross section in the shape of a hexagon or above, the cross section of the heat exchange core 2 of the present application has a smaller area, and the heat exchange core 2 has smaller dimensions in the second direction and the third direction.

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

[0147] In an embodiment, the first corner is arranged at the bottom plate 13 of the shell 1. In this way, the air outlet face 2d of the exhaust air and the air outlet face 2b of the supply air are not blocked by the bottom plate 13, and the air outlet face 2d of the exhaust air and the air outlet face 2b of the supply air can easily discharge air.

[0148] In an embodiment, the second corner is arranged at one end of the isolation plate 35.

[0149] In an embodiment, the third corner is arranged at one end of the partition plate 31.

[0150] In an embodiment, the fourth corner is arranged at the cover 14 on the first side of the shell 1 in the third direction.

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

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

[0153] In some embodiments, referring to Figures 5 to 7 , the partition piece 3 can further include a sealing plate 36 spaced apart from the connecting plate 33 in the first direction, and the sealing plate 36 is connected to one end of the partition plate 31 and the isolation plate 35 away from the connecting plate 33 in the first direction. The end of the heat exchange core 2 away from the connecting plate 33 in the first direction can abut against the sealing plate 36.

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

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

[0156] In some embodiments, the partition piece 3 can also be a split structure. That is, the partition piece 3 can be composed of a plurality of single components manufactured independently.

[0157] The material of the partition 3 includes but is not limited to plastic and the like. Sheet metal parts are difficult to make curved surfaces, difficult to make air guide structures according to the flow direction of the air flow, and the design is limited. The thickness of the thermal insulation foam part is usually large, occupying 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 can be in abutment with the shell 1 or the partition 3. For example, one end surface of the heat exchange core 2 along the first direction is in abutment with the shell 1, and the other end surface of the heat exchange core 2 along the first direction is in abutment with the partition 3. For another example, both end surfaces of the heat exchange core 2 along the first direction are in abutment with the shell 1. For another example, both end surfaces of the heat exchange core 2 along the first direction are in abutment with the partition 3. In this way, the air flow is prevented from flowing through the gap between the two end surfaces of the heat exchange core 2 along the first direction and the shell 1 or the partition 3.

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

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

[0161] For indoor air flow: the indoor air flow enters the shell 1 from the return air inlet 1a, flows in the shell 1 along the first air flow path X1, and is then discharged to the outdoor from the air exhaust inlet 1d, that is, the first air flow path X1 is the return air path of the indoor air flow (see Figure 2Specifically: the indoor airflow from the return air inlet 1a enters the return air passage 101a and flows in a curve to the first side of the third direction, and enters the heat exchange core 2 through the return air inlet face 2a and flows to the second side, the indoor airflow after heat exchange enters the exhaust air passage 104a through the exhaust air outlet face 2d, and finally enters the exhaust air chamber 102b and is discharged through the exhaust air outlet 1d. The indoor airflow flows in a linear flow, and there is almost no airflow dead angle, the air path is smooth, and the wind resistance is small.

[0162] For the outdoor airflow: the outdoor airflow enters the shell 1 from the fresh air inlet 1c and flows along the second airflow path X2 in the shell 1, and is then discharged to the indoor from the supply air outlet 1b, that is, the second airflow path X2 is a fresh air path for the outdoor airflow to flow (see Figure 2 ) The outdoor airflow from the fresh air inlet 1c enters the fresh air passage 103a and flows in a curve to the first side of the third direction, and enters the heat exchange core 2 through the fresh air inlet face 2c and flows to the second side, the outdoor airflow after heat exchange enters the supply air passage 102a through the supply air outlet face 2b, and finally enters the supply air chamber 101b and is discharged through the supply air outlet 1b. The outdoor airflow flows in a linear flow, and there is almost no airflow dead angle, the air path is smooth, and the wind resistance is small.

[0163] In the description of the present application, the description of the terms "in an embodiment", "in some embodiments" or "exemplary" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the skilled in the art can combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0164] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application is 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 defines a portion of the space within the housing as a heat exchange chamber, the heat exchange core being located within the heat exchange chamber. The partition includes a partition plate connecting the heat exchange core and the housing to separate the heat exchange chamber into a return air passage and a supply air passage.

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

3. The fresh air equipment 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 recessed area that is recessed away from the return air inlet. Using a plane perpendicular to the second direction as the projection plane, the projection of the return air vent is located within the projection range of the recessed area.

4. The fresh air equipment according to claim 3, characterized in that, The recessed area has an arc-shaped surface.

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

6. The fresh air equipment according to claim 3, characterized in that, The fresh air equipment includes a return air filter located in the return air duct, and the return air filter is located between the return air inlet and the guide plate.

7. The fresh air equipment according to claim 6, characterized in that, The partition plate includes a diversion plate and a support plate. The support plate connects the diversion plate and the guide plate. One end of the diversion plate is connected to the second side of the return air vent in a third direction. The other end of the diversion plate extends away from the return air vent. The return air filter is disposed on the support plate.

8. The fresh air equipment according to claim 2, characterized in that, The air supply channel includes an expansion section, the cross-sectional area of ​​which increases from away from the air supply chamber toward closer to the air supply chamber.

9. The fresh air equipment according to claim 2, characterized in that, The partition includes a partition plate, the surface of which is part of the surface of the air supply chamber, one end of which is connected to the partition plate in a third direction, and a portion of which protrudes toward the partition plate.

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

11. The fresh air equipment according to claim 10, characterized in that, The separator includes a connector disposed on the separator plate, the connector and the separator plate together defining a slot with a first side opening in a third direction, and a portion of the connecting plate is inserted into the slot.

12. The fresh air equipment according to claim 2, characterized in that, An air outlet is formed on the first side wall of the outer casing, and the air outlet is connected to the air supply chamber.

13. The fresh air equipment according to any one of claims 1 to 12, characterized in that, The outer casing has a fresh air inlet and an exhaust air outlet. 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 connected to the fresh air inlet, and the exhaust air outlet is connected to the exhaust air channel.

14. The fresh air equipment 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 portion of the surface of the return air channel, and the supply air outlet surface is a portion of the surface of the supply air channel.

Images