Heat recovery unit

Abstract

The utility model discloses a heat recovery unit which comprises a heat exchange core body, the heat exchange core body is at least provided with a first heat exchange channel and a second heat exchange channel, the first heat exchange channel and the second heat exchange channel can exchange heat with each other, and an inlet and an outlet of the first heat exchange channel and an inlet and an outlet of the second heat exchange channel are located on the conduction side face of the heat exchange core body. The air conditioner further comprises a filtering structure, at least one conducting side face is provided with a frame forming an inlet and outlet, a set of frame edges, away from the two sides, of the frame are each provided with a first sliding part, a set of opposite two sides in the filtering structure are each provided with a second sliding part, and the second sliding part on each side is in sliding fit with the first sliding part on the corresponding side. The frame forming the inlet and outlet is used for bearing the first sliding piece, arrangement of the first sliding piece is greatly facilitated, meanwhile, the second sliding piece is arranged on the filtering structure, and therefore the filtering structure only needs to be installed in a sliding mode. The heat recovery unit can effectively solve the problem that the installation effect of the filtering structure is not good.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, and more specifically, to a heat recovery unit. Background Art

[0002] Refrigeration systems typically require a certain exhaust volume to maintain a pressure differential between the system and the duct design. Therefore, to ensure design requirements are met, a certain amount of fresh air, return air, and exhaust air is typically present. Heat recovery, through heat exchange design, can pre-cool or pre-heat fresh air, reducing system load.

[0003] Large spaces, offices, data centers, and other areas often require a certain amount of fresh air to maintain positive pressure inside the room, ensuring proper operation of equipment and a comfortable working environment for personnel. In these situations, the ventilation system typically exhausts some of the exhaust air.

[0004] In summer, exhaust air exchanges heat with fresh air. Exhaust air, which is discharged indoors at a lower temperature than fresh air, is pre-cooled. This reduces the fresh air load the system needs to handle, resulting in energy savings.

[0005] In winter, exhaust air exchanges heat with fresh air. Exhaust air, which is the indoor airflow, is preheated at a higher temperature than fresh air. This reduces the fresh air load the system needs to handle, saving energy.

[0006] In particular, since these units are often used in large spaces, data centers, and other areas, they should be equipped with appropriate filters, usually on the air side. Currently, existing filters on the market are typically installed using screws, welding, or clamping, making them inconvenient to install and remove.

[0007] In the process of realizing the invention of the present utility model, the inventors discovered that there are at least the following problems in the prior art: the problem of poor installation effect of the filtering structure. Utility Model Content

[0008] In view of this, an object of the present invention is to provide a heat recovery unit, which can effectively solve the problem of poor installation effect of the filtering structure.

[0009] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0010] A heat recovery unit includes a heat exchange core, the heat exchange core having at least two first heat exchange channels and a second heat exchange channel that can exchange heat with each other, the inlet and outlet of the first heat exchange channel and the inlet and outlet of the second heat exchange channel are located on the conductive side of the heat exchange core; and also includes a filtering structure, at least one of the conductive side surfaces has a frame forming an inlet and outlet, a group of the frame edges away from both sides are provided with a first sliding member, a group of opposite sides of the filtering structure are provided with a second sliding member, and the second sliding member on each side slides with the first sliding member on the corresponding side.

[0011] In the above-mentioned heat recovery unit, when in use, the first sliding member is set on the corresponding frame, and then the first sliding member and the second sliding member are slidably matched to install the filter structure. In the above-mentioned heat recovery unit, the frame constituting the inlet and outlet is used to support the first sliding member, which greatly facilitates the installation of the first sliding member. At the same time, a second sliding member is provided on the filter structure, so that the first sliding member and the second sliding member are matched, so that the filter structure only needs to be slid into place. In summary, the heat recovery unit can effectively solve the problem of poor installation effect of the filter structure.

[0012] In some technical solutions, the first heat exchange channel guides the fluid along a first direction, the second heat exchange channel guides the fluid along a second direction, and the first direction and the second direction are arranged crosswise; the heat exchange core includes four columns extending along a third direction and arranged parallel to each other; the third direction is arranged perpendicular to the first direction and the second direction; along the third direction, the two side surfaces of the heat exchange core respectively form a first cover plate and a second cover plate.

[0013] In some technical solutions, the heat exchange core is provided with the filtering structure on the side thereof, and the first cover plate edge, the second cover plate edge and the corresponding two columns respectively constitute the four frame edges of the frame, and the first sliding parts on both sides are respectively provided on the columns on the corresponding side.

[0014] In some technical solutions, the first sliding member is a slide rail member, and two ends of the slide rail member are respectively aligned with two ends of the corresponding column; the first sliding member is integrally formed and connected to the corresponding column.

[0015] In some technical solutions, the first sliding member is a slide rail member, and the two ends of the slide rail member are respectively aligned with the two ends of the corresponding column; the first sliding member is welded or screwed to the corresponding column.

[0016] In some technical solutions, the heat exchange core forms a quadrangular prism structure, the four columns respectively form four parallel edges of the quadrangular prism structure, and the first cover plate and the second cover plate respectively form two end portions of the quadrangular prism structure;

[0017] Along the first direction, on one side of the heat exchange core, the first cover plate edge, the second cover plate edge and the corresponding two columns constitute the inlet of the first heat exchange channel;

[0018] Along the first direction, on the other side of the heat exchange core, the first cover plate edge, the second cover plate edge and the corresponding two columns constitute the outlet of the first heat exchange channel;

[0019] Along the second direction, on one side of the heat exchange core, the first cover plate edge, the second cover plate edge and the corresponding two columns constitute the inlet of the second heat exchange channel;

[0020] Along the second direction, on the other side of the heat exchange core, the first cover plate edge, the second cover plate edge and the corresponding two columns constitute the outlet of the second heat exchange channel.

[0021] In some technical solutions, the second heat exchange channel is a fresh air channel, and the filtering structure is arranged at the inlet of the second heat exchange channel.

[0022] In some technical solutions, the heat exchange core is a tube-fin heat recovery device or a cross-tube heat recovery device.

[0023] In some technical solutions, a group of opposite side edges in the filtering structure are respectively a first side edge and a second side edge, and at least one of the first side edge and the second side edge is provided with a plurality of second sliding members that are all slidably matched with the same first sliding member.

[0024] In some technical solutions, an elastic clamping component is provided on the second sliding member to clamp the first sliding member, so as to prevent the first sliding member and the second sliding member from sliding relative to each other during clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of a heat recovery unit provided in an embodiment of the present utility model;

[0027] Figure 2 A schematic structural diagram of a heat exchange core provided in an embodiment of the present utility model;

[0028] Figure 3 A schematic structural diagram of another heat exchange core provided by an embodiment of the present utility model;

[0029] Figure 4 A schematic diagram of the structure of the filtration structure provided by an embodiment of the utility model;

[0030] Figure 5 A schematic structural diagram of a sliding member provided in an embodiment of the present utility model;

[0031] Figure 6 A schematic diagram of the side structure of a sliding member provided in an embodiment of the present utility model;

[0032] Figure 7 This is a schematic diagram of the end structure of a sliding member provided in an embodiment of the utility model.

[0033] The following are marked in the accompanying drawings:

[0034] Heat exchange core 1, first heat exchange channel 2, second heat exchange channel 3, conducting side surface 4, frame 5, inlet and outlet 6, first sliding member 7, second sliding member 8, column 9, first cover plate 10, second cover plate 11, filter structure 12;

[0035] Base 8-1, first clamping member 8-2, second clamping member 8-3;

[0036] The first column 9-1 and the second column 9-2. DETAILED DESCRIPTION

[0037] The embodiment of the utility model discloses a heat recovery unit, which can effectively solve the problem of poor installation effect of the filtering structure.

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See also Figure 1-Figure 7 , Figure 1 A schematic structural diagram of a heat recovery unit provided in an embodiment of the present utility model; Figure 2 A schematic structural diagram of a heat exchange core provided in an embodiment of the present utility model; Figure 3 A schematic structural diagram of another heat exchange core provided by an embodiment of the present utility model; Figure 4 A schematic diagram of the structure of the filtration structure provided by an embodiment of the utility model; Figure 5A schematic structural diagram of a sliding member provided in an embodiment of the present utility model; Figure 6 A schematic diagram of the side structure of a sliding member provided in an embodiment of the present utility model; Figure 7 This is a schematic diagram of the end structure of a sliding member provided in an embodiment of the utility model.

[0040] In some embodiments, a heat recovery unit is provided, which mainly includes a heat exchange core 1 and may also include some other structures. How the heat exchange core 1 works is described as follows. The heat exchange core 1 has at least two first heat exchange channels 2 and second heat exchange channels 3 that can exchange heat with each other. The first heat exchange channel 2 and the second heat exchange channel 3 are used to circulate fluids of different temperatures. For example, a fluid with a higher temperature can flow in the first heat exchange channel 2, and a fluid with a lower temperature can flow in the second heat exchange channel 3. In the heat exchange core 1, heat is conducted through the channel wall so that the fluid in the second heat exchange channel 3 absorbs heat from the fluid in the first heat exchange channel 2, thereby recovering the temperature of the fluid in the first heat exchange channel 2. In a specific application, the first heat exchange channel 2 circulates indoor exhaust air, and the second heat exchange channel 3 circulates fresh air. In the heat exchange core 1, the fresh air absorbs heat from the indoor exhaust air through the channel wall and enters the room after being heated, which can reduce energy loss and avoid the fresh air temperature being too low.

[0041] Generally speaking, the inlet and outlet 6 of the first heat exchange channel 2 and the inlet and outlet 6 of the second heat exchange channel 3 are located on the conductive side 4 of the heat exchange core 1, so that air can enter and exit from different conductive sides 4. Regarding the description here, it should be explained as follows: the inlet and outlet 6 can be two openings. In this case, one of the two openings is an inlet and the other is an outlet. The fluid enters the corresponding heat exchange channel (the first heat exchange channel 2 or the second heat exchange channel 3) of the heat exchange core 1 from the inlet and then flows out from the outlet to separate from the corresponding heat exchange channel of the heat exchange core 1, so as to achieve continuous entry and exit during use; or there can be only one opening, which serves as the inlet and outlet respectively in different time periods, that is, alternately as the inlet and outlet. The number of inlet and outlet 6 of the first heat exchange channel 2 and the second heat exchange channel 3 can be set according to specific needs. If the number is different, for example, the inlet and outlet 6 of the first heat exchange channel 2 is one opening, and the inlet and outlet 6 of the second heat exchange channel 3 is two. It should also be noted that regarding the various conductive side surfaces of the heat exchange core 1: first, the heat exchange core 1 is block-shaped as a whole, so it will have different side surfaces, such as two side surfaces in the first direction, two side surfaces in the second direction, and two side surfaces in the third direction when it is a subsequent quadrangular prism structure; secondly, among all the side surfaces, some or all of the side surfaces are conductive side surfaces, and the conductive side surfaces are different from other side surfaces in that the conductive side surfaces are provided with the above-mentioned inlet and outlet 6 (inlet and / or outlet), as described later, the two side surfaces in the first direction and the two side surfaces in the second direction are both conductive side surfaces. The inlet and outlet 6 of the first heat exchange channel 2 and the inlet and outlet 6 of the second heat exchange channel 3 can be located on the same conductive side surface 4 of the heat exchange core 1, or they can be located on different conductive side surfaces 4 of the heat exchange core 1. When the inlet and outlet 6 include an inlet and an outlet, the inlet and outlet can also be located on different conductive side surfaces 4 of the heat exchange core 1.

[0042] In some embodiments, the heat recovery unit provided includes not only the heat exchange core 1, and the heat exchange core 1 may refer to other embodiments. The heat recovery unit also includes a filter structure 12, with the filter structure 12 being provided at at least one of the inlet and / or outlet ports 6 (the inlet and / or the outlet) to facilitate filtration. The main operating component of the filter structure 12 is a filter screen, which is used to filter out predetermined impurities in the corresponding fluid, such as particulate matter with a predetermined particle size above the predetermined particle size.

[0043] In some embodiments, regarding how the filter structure 12 is mounted on the heat exchange core 1, one installation method is to provide a sliding fit between the filter structure 12 and the heat exchange core 1, such as by means of a first sliding member 7 and a second sliding member 8 described below, thereby facilitating assembly and disassembly. Furthermore, the filter structure 12 and the frame edge of the heat exchange core 1 are slidably fitted together via the mating sliding members.

[0044] Specifically, at least one of the conductive side surfaces 4 has a frame 5 forming an inlet and outlet 6, that is, the edges of the conductive side surfaces 4 are combined to form the frame 5, that is, the edges of the conductive side surfaces 4 constitute the frame edge. Taking the square conductive side surface 4 as an example, the four edges are respectively the frame edges, and the four edges are combined to form the square frame 5; taking the circular conductive side surface 4 as an example, the annular edge is the frame edge, that is, it constitutes the above-mentioned circular frame 5. The frame opening surrounded by the frame 5 constitutes the inlet and outlet 6, wherein the frame opening is the inner area surrounded by the frame edges on all sides. The shape of the frame opening is not required to be consistent with the outer contour of the side pattern, and an inner circle and an outer square, or an inner square and an outer circle are all possible.

[0045] The frame 5 has two sets of oppositely spaced edges, each with a first slider 7. Specifically, for a circular frame 5 (named after the shape of its opening), a first slider 7 is positioned along each end of one diameter, extending tangentially, that is, perpendicular to that diameter. For a rectangular frame 5 (named after the shape of its opening), there are two sets of oppositely spaced edges, and at least one of these sets of oppositely spaced edges is provided with a first slider 7. The sliders extend along the corresponding edges. If a first slider 7 is provided on a particular edge, then the first slider 7 extends along that edge.

[0046] The filter structure 12 is used to cover the corresponding upper frame opening of the frame 5. A second sliding member 8 is provided on two opposite sides of the filter structure 12. The second sliding member 8 on each side slides with the first sliding member 7 on the corresponding side, thereby achieving sliding engagement between the filter structure 12 and the corresponding frame 5. Specifically, one of the first sliding member 7 and the second sliding member 8 is a slide rail, and the other is a slider.

[0047] In the above-mentioned heat recovery unit, when in use, the first sliding member 7 is set on the corresponding frame 5, and then the first sliding member 7 and the second sliding member 8 are slidably matched to install the filter structure 12. In the above-mentioned heat recovery unit, the frame 5 constituting the inlet and outlet 6 is used to support the first sliding member 7, which greatly facilitates the installation of the first sliding member 7. At the same time, the second sliding member 8 is set on the filter structure 12, so that the first sliding member 7 and the second sliding member 8 are matched. In this way, the filter structure 12 only needs to be slid into place. In summary, the heat recovery unit can effectively solve the problem of poor installation effect of the filter structure 12.

[0048] In some embodiments, the first heat exchange channel 2 can be made to guide the fluid along the first direction, and the second heat exchange channel 3 can be made to guide the fluid along the second direction. The first direction and the second direction are arranged crosswise, and the crosswise arrangement is different from the same direction arrangement or the reverse arrangement. The heat exchange core 1 includes four columns 9 extending along a third direction and arranged parallel to each other, wherein the third direction is arranged perpendicular to the first direction and the second direction. The side wall is supported by the columns 9 perpendicular to the fluid flow direction, and various structures can be supported at the same time. At this time, along the third direction, the first cover plate 10 and the second cover plate 11 are formed on both sides of the heat exchange core 1 respectively. A better external support structure is formed by the first cover plate 10, the second cover plate 11 and the four columns 9 to ensure the support strength of the external support structure.

[0049] In some embodiments, the heat exchange core 1 can be provided with the filter structure 12 on one side thereof, with the edges of the first cover plate 10, the second cover plate 11, and the corresponding two columns 9 forming the four edges of the frame 5. In this case, the first sliding members 7 on both sides are respectively provided on the columns 9 on the corresponding side. The above analysis shows that the support structure composed of four columns 9 and two cover plates not only improves structural strength, but also greatly facilitates the installation of the filter structure 12.

[0050] In some embodiments, the first sliding member 7 is a rail member, and the two ends of the rail member are aligned with the two ends of the corresponding pillar 9. The first sliding member 7 can also reinforce the pillar 9. At the same time, it is extended along the corresponding pillar 9 to facilitate sealing.

[0051] In some embodiments, the first sliding member 7 and the corresponding column 9 can be integrally formed and connected.

[0052] In some embodiments, the first sliding member 7 may be a slide rail member, and the two ends of the slide rail member are aligned with the two ends of the corresponding column 9 respectively; the first sliding member 7 is welded or screwed to the corresponding column 9.

[0053] When the first sliding member 7 is a slide rail, it may be formed as a protrusion, and the second sliding member 8 is provided with a slide groove that matches the protrusion.

[0054] In some embodiments, the heat exchange core 1 can form a quadrangular prism structure, the four columns 9 respectively form four parallel edges of the quadrangular prism structure, and the first cover plate 10 and the second cover plate 11 respectively form the two end portions of the quadrangular prism structure.

[0055] Along the first direction, on one side of the heat exchange core 1 , the edge of the first cover plate 10 , the edge of the second cover plate 11 and the corresponding two columns 9 constitute the inlet of the first heat exchange channel 2 .

[0056] Along the first direction, on the other side of the heat exchange core 1 , the edge of the first cover plate 10 , the edge of the second cover plate 11 and the corresponding two columns 9 constitute the outlet of the first heat exchange channel 2 .

[0057] That is, on both sides of the heat exchange core 1 along the first direction: on one side, the edge of the first cover plate 10, the edge of the second cover plate 11 and the corresponding two columns 9 constitute a frame 5, and the frame opening serves as the entrance of the first heat exchange channel 2; on the other side, the edge of the first cover plate 10, the edge of the second cover plate 11 and the corresponding two columns 9 constitute a frame 5, and the frame opening serves as the outlet of the first heat exchange channel 2.

[0058] Along the second direction, on one side of the heat exchange core 1 , the edge of the first cover plate 10 , the edge of the second cover plate 11 and the corresponding two columns 9 constitute the inlet of the second heat exchange channel 3 .

[0059] Along the second direction, on the other side of the heat exchange core 1 , the edge of the first cover plate 10 , the edge of the second cover plate 11 and the corresponding two columns 9 constitute the outlet of the second heat exchange channel 3 .

[0060] That is, on both sides of the heat exchange core 1 along the second direction: on one side, the edge of the first cover plate 10, the edge of the second cover plate 11 and the corresponding two columns 9 constitute a frame 5, and the frame opening serves as the entrance of the second heat exchange channel 3; on the other side, the edge of the first cover plate 10, the edge of the second cover plate 11 and the corresponding two columns 9 constitute a frame 5, and the frame opening serves as the outlet of the second heat exchange channel 3.

[0061] In some embodiments, the second heat exchange channel 3 can be a fresh air channel, and the filtering structure 12 is provided at the inlet of the second heat exchange channel 3 to mainly filter and cool the outdoor fresh air.

[0062] In some embodiments, the heat exchange core 1 can be a tube-fin heat recovery device or a cross-tube heat recovery device. Of course, other structures can also be used.

[0063] In some embodiments, a group of opposite side edges in the filtering structure 12 can be respectively a first side edge and a second side edge, and at least one of the first side edge and the second side edge is provided with a plurality of second sliding members 8 that are all slidably engaged with the same first sliding member 7 .

[0064] At the frame 5 where the filter structure 12 is mounted, the two side columns 9 are first columns 9-19 and second columns 9-29, corresponding to the first side and the second side, respectively. When the frame 5 is a rectangular frame 5, the filter structure 12 is rectangular and sheet-shaped, and is arranged parallel to the frame opening of the frame 5, wherein the first side is parallel to the first column 9-19, and the second side is parallel to the second column 9-29.

[0065] Two second sliding members 8 may be arranged at both ends of the first side, that is, at both ends along the third direction, and two second sliding members 8 may also be arranged at both ends of the corresponding second side.

[0066] In some embodiments, after the filter structure 12 is installed, a stopper, such as a shoulder, can be used to prevent the filter structure 12 from sliding further, thereby maintaining the current position. However, this fixation effect is not good. To facilitate fixation, it is preferred that the second slide 8 is provided with an elastic clamping assembly to clamp the first slide 7, thereby preventing the first slide 7 and the second slide 8 from sliding relative to each other during clamping.

[0067] Specifically, the second sliding member 8 can include a base 8-1 and a first clamping member 8-2 and a second clamping member 8-3 located on either side of the base 8-1, wherein the first clamping member 8-2 and the second clamping member 8-3 are both rotatably connected to the base 8-1, and the rotation axis of the rotatable connection extends along the sliding direction of the second sliding member 8. A spring is provided between the first clamping member 8-2 and the second clamping member 8-3 to prevent the clamping end of the first clamping member 8-2 and the clamping end of the second clamping member 8-3 from moving away from each other. The clamping ends of the first clamping member 8-2 and the second clamping member 8-3 respectively abut against the grooves on both sides of the sliding protrusion, thereby forming a clamping state.

[0068] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0069] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat recovery unit, comprising a heat exchange core, wherein the heat exchange core has at least two first heat exchange channels and a second heat exchange channel capable of exchanging heat with each other, wherein the inlet and outlet of the first heat exchange channel and the inlet and outlet of the second heat exchange channel are located on a conductive side surface of the heat exchange core; characterized in that: It also includes a filtering structure, at least one of the conductive side surfaces has a frame forming an inlet and outlet, a group of the frame edges away from both sides are provided with a first sliding member, and a group of opposite sides of the filtering structure are provided with a second sliding member, and the second sliding member on each side slides with the first sliding member on the corresponding side.

2. The heat recovery unit according to claim 1, characterized in that: The first heat exchange channel guides fluid along a first direction, and the second heat exchange channel guides fluid along a second direction, and the first direction and the second direction are arranged crosswise; the heat exchange core includes four columns extending along a third direction and arranged parallel to each other; the third direction is arranged perpendicular to the first direction and the second direction; along the third direction, the two side sides of the heat exchange core respectively form a first cover plate and a second cover plate.

3. The heat recovery unit according to claim 2, characterized in that: The heat exchange core is provided with the filtering structure on one side, and the first cover plate edge, the second cover plate edge and the corresponding two columns respectively constitute the four frame edges of the frame, and the first sliding members on both sides are respectively provided on the columns on the corresponding side.

4. The heat recovery unit according to claim 3, characterized in that: The first sliding member is a slide rail member, and two ends of the slide rail member are respectively aligned with two ends of the corresponding column; the first sliding member is integrally formed and connected with the corresponding column.

5. The heat recovery unit according to claim 3, characterized in that: The first sliding member is a slide rail member, and two ends of the slide rail member are respectively aligned with two ends of the corresponding column; the first sliding member is welded or screwed to the corresponding column.

6. The heat recovery unit according to claim 3, characterized in that: The heat exchange core forms a quadrangular prism structure, the four columns respectively form four parallel edges of the quadrangular prism structure, and the first cover plate and the second cover plate respectively form two end portions of the quadrangular prism structure; Along the first direction, on one side of the heat exchange core, the first cover plate edge, the second cover plate edge and the corresponding two columns constitute the inlet of the first heat exchange channel; Along the first direction, on the other side of the heat exchange core, the first cover plate edge, the second cover plate edge and the corresponding two columns constitute the outlet of the first heat exchange channel; Along the second direction, on one side of the heat exchange core, the first cover plate edge, the second cover plate edge and the corresponding two columns constitute the inlet of the second heat exchange channel; Along the second direction, on the other side of the heat exchange core, the first cover plate edge, the second cover plate edge and the corresponding two columns constitute the outlet of the second heat exchange channel.

7. The heat recovery unit according to claim 3, characterized in that: The second heat exchange channel is a fresh air channel, and the filtering structure is arranged at the inlet of the second heat exchange channel.

8. The heat recovery unit according to claim 7, characterized in that: The heat exchange core is a tube-fin heat recovery device or a cross-tube heat recovery device.

9. The heat recovery unit according to any one of claims 1 to 8, characterized in that: A group of opposite side edges in the filtering structure are respectively a first side edge and a second side edge, and at least one of the first side edge and the second side edge is provided with a plurality of second sliding members that are all slidably matched with the same first sliding member.

10. The heat recovery unit according to claim 9, characterized in that: The second sliding member is provided with an elastic clamping component to clamp the first sliding member, so as to prevent the first sliding member and the second sliding member from sliding relative to each other during clamping.

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