CN216815131U - Heat exchange core body for total heat exchanger - Google Patents

Abstract

The utility model provides a heat exchange core (13) for a total heat exchanger (10), wherein the heat exchange core (13) comprises a plurality of heat conduction sheets (21) made of total heat exchange materials and a plurality of corrugated plates made of plastic materials, the plurality of corrugated plates comprise a first corrugated plate (15) and a second corrugated plate (16), the first corrugated plate (15) and the adjacent heat conduction sheet (21) form an air flow channel (22) extending along a first air flow direction, the second corrugated plate (16) and the adjacent heat conduction sheet (21) form an air flow channel (22) extending along a second air flow direction, the first air flow direction and the second air flow direction are crossed with each other, and the wave crest of at least one corrugated plate comprises a plane or a concave structure; and/or the trough of at least one corrugated board comprises a flat or concave-like structure. The heat exchange core body for the total heat exchanger can reduce the air leakage rate among the airflow channels.

Description

Heat exchange core body for total heat exchanger

Technical Field

The utility model relates to the technical field of total heat exchangers, in particular to a total heat exchanger used in a fresh air system, and specifically relates to a heat exchange core body used for the total heat exchanger.

Background

The fresh air system can enjoy external fresh air without windowing, and has more use comfort compared with the traditional air conditioning system. Generally, the fresh air system is composed of an air supply system and an air exhaust system, wherein outside fresh air is supplied into a room through the air supply system, and indoor air is exhausted through the air exhaust system. The direct exchange of indoor air and outdoor air results in energy loss, and in order to reduce the energy consumption of the system, a heat exchange system is usually provided in the fresh air system.

In a fresh air system, one common form of total heat exchanger is: the total heat exchanger comprises a shell or a frame and a heat exchange machine core arranged in the shell or the frame, wherein the heat exchange machine core is constructed to be respectively provided with corrugated plates on the upper surface and the lower surface of each heat exchange sheet, airflow channels are formed between the corrugated plates and the heat exchange sheets, and the extending directions of the adjacent corrugated plates are mutually crossed, so that the airflow channels of the adjacent layers are mutually crossed, and the airflow to be subjected to heat exchange is respectively through the airflow channels of the adjacent layers, so that the heat exchange is realized.

The problem of air leakage between airflow channels exists in the existing total heat exchanger and heat exchanger core, and then mixing of fresh air and turbid air exists, the air supply quality of a fresh air system is influenced, and the leakage of air inlet means energy loss.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to overcome at least partly the drawbacks of the prior art and to provide a novel heat exchanger core for a total heat exchanger.

The utility model also aims to provide a heat exchange core body for the total heat exchanger, which can reduce the air leakage rate among air flow channels.

The utility model also aims to provide a heat exchange core body for the total heat exchanger, which improves the air supply quality of a fresh air system.

The utility model also aims to provide a heat exchange core body for the total heat exchanger, and the energy-saving performance of a fresh air system is improved.

To achieve one of the above objects or purposes, the technical solution of the present invention is as follows:

a heat exchange core for a total heat exchanger comprises a plurality of heat conduction sheets made of total heat exchange materials and a plurality of corrugated plates made of plastic materials, wherein the plurality of corrugated plates comprise a first corrugated plate and a second corrugated plate, the first corrugated plate and the adjacent heat conduction sheet form an air flow channel extending along a first air flow direction, the second corrugated plate and the adjacent heat conduction sheet form an air flow channel extending along a second air flow direction, and the first air flow direction and the second air flow direction are mutually crossed,

wherein the peaks of at least one corrugated board comprise a planar or concave-like structure; and/or the troughs of at least one corrugated board comprise a planar or concave-like structure.

According to a preferred embodiment of the utility model, the wave crests of at least one corrugated board form non-sharp bends; and/or

The wave trough of at least one corrugated board forms the non-sharp bending part.

According to a preferred embodiment of the utility model, the crests of the at least one corrugated board comprise a planar structure and the troughs of the at least one corrugated board comprise a concave-like structure; or

The crests of the at least one corrugated board comprise a concave-like structure and the troughs of the at least one corrugated board comprise a planar structure.

According to a preferred embodiment of the utility model, the planar structure comprises straight sections.

According to a preferred embodiment of the utility model, the concave structure of the wave crest comprises a reverse bending section which points opposite to the direction of the wave crest; or the concave structure of the wave trough comprises reverse bending sections which point to the opposite direction of the wave trough.

According to a preferred embodiment of the present invention, a perpendicular projection of at least one corrugated sheet in the plane of the thermally conductive sheet includes a first corner portion and first and second sides adjacent to the first corner portion, and the first corner portion is recessed toward a center of the corrugated sheet with respect to an angle formed by the first and second sides.

According to a preferred embodiment of the utility model, the first corner is a straight chamfer corner, a rounded chamfer corner, a notch corner or an inner groove corner connecting the first and second edges.

According to a preferred embodiment of the present invention, the plurality of corrugated sheets are identical in structure and shape.

According to a preferred embodiment of the present invention, the outer contour of the thermally conductive sheet is the same shape as the outer contour of the corrugated board.

According to a preferred embodiment of the utility model, the same corrugated board has a plurality of corners;

the plurality of corners may have the same shape, or two of the plurality of corners may have different shapes.

According to the heat exchange core body for the total heat exchanger, the corrugated plate forming the heat exchange core body is in non-line contact with the heat conduction sheet, namely, the wave crest or the wave trough of the corrugated plate forms a non-sharp bending part, specifically, the corrugated plate can be in a plane structure or a concave structure. Therefore, fresh air cannot be mixed by turbid air, the air supply quality of a fresh air system is influenced, and unnecessary energy loss is avoided.

Drawings

Fig. 1 is a schematic perspective view of a heat exchange core of a total heat exchanger;

FIG. 2 is a top view of the heat exchange core of FIG. 1;

FIG. 3 is a front view of the heat exchange core of FIG. 1;

FIG. 4 is an enlarged view of portion I of FIG. 1;

fig. 5 is a schematic perspective view of an enthalpy exchanger according to an embodiment of the present invention;

FIG. 6 is an enlarged partial view of the total heat exchanger of FIG. 5;

fig. 7 is a top view of an enthalpy exchanger according to an embodiment of the present invention, with end caps removed;

fig. 8 shows a corner of a prior art enthalpy exchanger as a comparative example;

FIG. 9 is an enlarged view of section III of FIG. 7;

fig. 10 is a top view of an enthalpy exchanger according to an embodiment of the present invention, with end caps removed;

fig. 11 is a top view of an enthalpy exchanger according to another embodiment of the present invention, with end caps removed;

fig. 12 is a top view of an enthalpy exchanger according to yet another embodiment of the present invention, with end caps removed;

fig. 13 is a top view of an enthalpy exchanger according to yet another embodiment of the present invention, with end caps removed;

fig. 14 is a top view of an enthalpy exchanger according to yet another embodiment of the present invention, with end caps removed;

fig. 15 is an enlarged view of a portion II in fig. 3;

FIG. 16 shows, as a comparative example, a partial structure of a heat exchange core in the prior art;

FIG. 17 shows a partial structure of a heat exchange core according to an embodiment of the present invention;

figure 18 shows a corrugated sheet of a heat exchange core according to one embodiment of the present invention;

figure 19 is an enlarged partial view of the corrugated board of figure 18;

fig. 20 shows the connection of the corrugated sheets and the heat conductive sheets of the heat exchange core of the foregoing embodiment;

figure 21 shows a corrugated sheet of a heat exchange core according to another embodiment of the utility model;

figure 22 is an enlarged partial view of the corrugated board of figure 21; and

fig. 23 shows the connection of the corrugated sheets and the heat conductive sheets of the heat exchange core of the foregoing embodiment.

Detailed Description

Exemplary embodiments of the present invention will hereinafter be described in detail with reference to the accompanying drawings, wherein like or similar reference numerals denote like or similar elements. Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.

Fig. 1 to 3 show the basic structure of the heat exchange core of the total heat exchanger, which comprises a plurality of heat conductive sheets 21 and a plurality of corrugated sheets, one corrugated sheet being provided on each of both surfaces (upper and lower surfaces) of the plurality of heat conductive sheets 21, actually, the plurality of heat conductive sheets 21 and the plurality of corrugated sheets are alternately arranged, and the corrugated sheets are combined with the heat conductive sheets, for example, bonded together, and the crests of the corrugated sheets located in the middle are combined with the upper heat conductive sheets, and the troughs thereof are combined with the lower heat conductive sheets; the corrugated sheets on both surfaces of the same heat conductive sheet, such as the lowermost heat conductive sheet 21 in fig. 4, have different extending directions of the lower corrugated sheet and the upper corrugated sheet, and normally, their extending directions are perpendicular to each other, but other arrangements are not excluded, and the first corrugated sheet 15 is combined with one heat conductive sheet 21 to form a gas flow passage 22 extending in the first gas flow direction, and the second corrugated sheet 16 is combined with one heat conductive sheet 21 to form a gas flow passage 22 extending in the second gas flow direction. The gas flow channels 22 extending in the first gas flow direction and the gas flow channels 22 extending in the second gas flow direction are each intended for letting in two gas flows to be heat exchanged. The plurality of heat conductive sheets 21 are made of a total heat exchange material.

Looking at fig. 4, when the corners of the heat exchange core are not effectively sealed, the flow of air in the first air flow direction easily flows to the air flow passages 22 extending in the second air flow direction, or the flow of air in the second air flow direction easily flows to the air flow passages 22 extending in the first air flow direction, so that there is intermixing of the flows of the heat exchange gas. The corners of the heat exchange core are surrounded by the corner protectors which, if not tightly bonded to the corners, may be subject to such blending or leakage. Such mixing or leakage can affect the air supply quality of the fresh air system and also bring about energy loss.

Fig. 8 shows in a comparative example the corner of a prior art total heat exchanger where the corner of the heat exchange core is surrounded by a corner protector 12, and conventionally the corner of the heat exchange core is a right angle structure, i.e. the corner is a right angle corner 17, and similarly the corners of the heat conducting sheet 21 and the corrugated sheet forming the heat exchange core are both right angle structures, and the corner protector 12 is also a right angle structure, so that the gap formed between the heat exchange core and the corner protector is small, and cannot be filled with a sufficient amount of glue, and there is a possibility of leakage there. In the prior art, the corners of the heat exchange core are made to be sharp.

The utility model proposes a novel total heat exchanger, which comprises a frame and a heat exchange core 13, wherein the frame comprises a first end cover 11, a corner protector 12 and a second end cover 14, the number of the corner protector 12 is multiple, the heat exchange core is generally cubic depending on the shape of the heat exchange core 13, the number of the corner protector 12 is 4, and the frame formed by the 4 corner protectors 12 and the first end cover 11 and the second end cover 14 is wrapped outside the heat exchange core 13.

Heat exchange core 13 includes a plurality of corrugated sheet of a plurality of heat conduction pieces 21 and plastic materials, a plurality of corrugated sheet include first corrugated sheet 15 and second corrugated sheet 16, and first corrugated sheet 15 forms the air current passageway 22 along first air current direction extension with adjacent heat conduction piece 21, and second corrugated sheet 16 forms the air current passageway 22 along second air current direction extension with adjacent heat conduction piece 21, and first air current direction and second air current direction are criss-cross each other.

The corner protector 12 is applied to the corner of the heat exchange core 13. the corrugated board according to the embodiment of the utility model, the corner of which is chamfered to form a non-right angle corner 18, is, for example, a square corrugated board, see fig. 7 and 9, and the corrugated board is recessed at the corner with respect to the complete square (right angle corner 17) as if a part of the material is removed. The specific form can be expressed as: the perpendicular projection of the corrugated board in a section perpendicular to the longitudinal extension direction of the corner protector 12 forms a first shape, the first shape comprises a first corner part and a first edge and a second edge adjacent to the first corner part, and the first corner part is retracted inwards in a direction away from the corner protector 12 relative to an included angle formed by the first edge and the second edge.

The purpose of design like this is exactly to form bigger space between the bight of corrugated sheet and angle bead 12, and more glue can be held in bigger space, consequently, can not have the interstitial point of gluing, and it is also difficult for the glue to drop, has improved leakproofness like this, has reduced the possibility that the air current of different directions is revealed in bight department.

The relationship of the corner portion to the corner protector 12 is illustrated here by way of example with one corrugated sheet, whereas in practice the perpendicular projections of a plurality of corrugated sheets in a cross section perpendicular to the longitudinal extension of the corner protector 12 have the same shape, i.e. a plurality of corrugated sheets have the same shape. Moreover, the vertical projection of the heat conduction sheet 21 in the section perpendicular to the longitudinal extension direction of the corner protector 12 is the same as the vertical projection of the corrugated plate in the section perpendicular to the longitudinal extension direction of the corner protector 12, that is, the peripheral profiles of the heat conduction sheet 21 and the corrugated plate are also the same, so that the gaps between the corners of the whole formed heat exchange core and the corner protector 12 are increased, and more glue can be filled.

The clearance between bight and the angle bead through the increase heat transfer core improves the leakproofness in order to fill more glue, so, under the bight condition of not going the angle of heat transfer core, can also realize for the heat transfer core epirelief through making the angle bead, perhaps makes the inner surface of angle bead indent in to the angle bead. This relationship can be expressed as: the perpendicular projection of the corner protector 12 in a section perpendicular to the longitudinal extension direction of the corner protector forms a second shape; the second shape includes a second corner and third and fourth sides adjacent to the second corner; the second corner portion protrudes outward away from the heat exchange core body 13 with respect to the angle formed by the third and fourth sides. Specifically, the second corner portion is an outer corner portion connecting the third side and the fourth side, which is not shown in the figure.

Further, it may be arranged that the first corner is retracted in a direction away from the corner protector 12 relative to an included angle formed by the first edge and the second edge; and the second corner portion protrudes outward away from the heat exchange core body 13 with respect to the angle formed by the third and fourth sides.

Fig. 10-14 show a form of an enthalpy exchanger according to different embodiments of the present invention, in which, in fig. 10, the corners of corrugated sheets are formed as straight chamfered corners 31, and the four corners are identical in shape; in fig. 11, the corner portions of the corrugated board are formed as rounded corner portions 32, and the four corner portions are identical in shape; in fig. 12, the corner portions of the corrugated board are formed as notched corner portions 33, and the four corner portions are identical in shape; in fig. 13, the corner portions of the corrugated board are formed as inner groove corner portions 34, and the four corner portions are identical in shape; in fig. 14, four corners of the corrugated board are different in shape, and the four corners are a straight chamfered corner 31, a rounded chamfered corner 32, a notched corner 33, and an inner groove corner 34, respectively, and are explained as an example.

Thus, the same corrugated board has a plurality of corners; the plurality of corners may be identical in shape, or two of the plurality of corners may be different in shape.

Referring to fig. 6, the first end cap 11 includes a flat plate body and a plurality of folded edges 111 extending perpendicularly from the flat plate body, a gap 112 is formed between adjacent folded edges 111, the gap 112 is used for receiving the corner protector 12, and a corner of the flat plate body opposite to the corner protector 12 is provided with a rounded chamfer 113.

According to the total heat exchanger with the corrugated structure of the present invention, the corrugated sheet and the heat conductive sheet forming the heat exchange core are designed to be inwardly tapered at the corners, that is, the corners thereof are made in a chamfered manner, or the corner protector is designed to be outwardly protruded with respect to the heat exchange core, or the corners of the heat exchange core are inwardly tapered and the corner protector is outwardly protruded at the same time, in this way, a larger space can be formed between the corners and the corner protector of the heat exchange core, more glue can be accommodated, the sealing property at the connection portion of the corners and the corner protector of the heat exchange core is improved, and the leakage of the air flow between the air flow passage in the first air flow direction and the air flow passage in the second air flow direction can be prevented, and therefore, the total heat exchanger with the corrugated structure of the present invention can reduce the air leakage rate between the air flow passages. Therefore, fresh air cannot be mixed by turbid air, the air supply quality of a fresh air system is influenced, and unnecessary energy loss is avoided.

In addition to the above-mentioned leakage at the corners of the heat exchange core, the designer finds that the leakage exists inside the heat exchange core, specifically, referring to fig. 15, fig. 15 is an enlarged view of section II in fig. 3, and normally, both the crests and troughs of the corrugated sheet are combined with the heat conductive sheet 21, so that the first air flow 19 in the first air flow direction does not enter the air flow channel (in which the second air flow 20 is present) extending in the second air flow direction, and therefore, it is not leaked or mixed, but when the combination of the crests or troughs of the corrugated sheet and the heat conductive sheet 21 is not tight, taking the second corrugated sheet 16 in fig. 15 as an example, if the crests thereof are not completely combined with the heat conductive sheet 21 on the upper side, the first air flow 19 passes through the gaps between the crests and the heat conductive sheet 21 on the upper side to be mixed with the second air flow 20. Fig. 16 shows a partial structure of a heat exchange core in the prior art in a comparative example, sharp bent portions 24 are formed at the peaks and valleys of the corrugated sheet, and the peaks and valleys are combined with the heat conductive sheet 21 only at the sharp bent portions 24, and thus, the formed combination is combined in line contact. The leakage air flow 23 in fig. 15 is leakage at the corner of the heat exchange core.

Therefore, according to another aspect of the present invention, in order to avoid the leakage inside the heat exchange core, the present invention provides a new heat exchange core 13 for a total heat exchanger 10, and similarly, the heat exchange core 13 comprises a plurality of heat conduction sheets 21 and a plurality of corrugated sheets made of plastic, the plurality of corrugated sheets comprises a first corrugated sheet 15 and a second corrugated sheet 16, the first corrugated sheet 15 and the adjacent heat conduction sheet 21 form an air flow channel 22 extending along a first air flow direction, the second corrugated sheet 16 and the adjacent heat conduction sheet 21 form an air flow channel 22 extending along a second air flow direction, and the first air flow direction and the second air flow direction are crossed with each other. Wherein the wave crests of at least one corrugated sheet are in non-line contact with the adjacent thermally conductive sheet 21; and/or the valleys of at least one corrugated sheet are brought into non-line contact with the adjacent thermally conductive sheet 21. It is desirable to strengthen the connection of the crests or troughs of the corrugated board to the thermally conductive sheet 21 by non-linear contact, avoiding the presence of leakage points.

Preferably, the wave crests of at least one corrugated board form a non-sharp bend 25; and/or the troughs of at least one of the corrugated sheets form a non-sharp bend 25, see fig. 17.

Figures 18-20 show a particular form of non-sharp bend 25, the non-sharp bend 25 comprising a planar structure comprising straight sections 26. The corrugated sheet and the thermally conductive sheet 21 are joined at the straight section 26, which are non-linear contacts, and the joining area is larger, and more glue can be accommodated. Figures 21-23 show another embodiment of a non-sharp bend 25, the non-sharp bend 25 comprising a concave structure, the concave structure of the wave peak comprising a reverse bend 27 pointing opposite to the pointing direction of the wave peak; or valleys, comprises reverse bends 27 pointing opposite to the direction of the valleys. The corrugated sheet is joined to the thermally conductive sheet 21 at the reverse bend 27, they are in non-linear contact, and the recess can accommodate more glue. Here, one corrugated board is taken as an example, but actually, a plurality of corrugated boards are identical in structure and shape.

The heat exchange core 13 for the total heat exchanger 10 includes a plurality of heat conductive sheets 21 and a plurality of corrugated sheets the plurality of heat conductive sheets 21 and the plurality of corrugated sheets are alternately arranged, alternatively, peaks and valleys of a portion of the plurality of corrugated sheets form a planar structure, and peaks and valleys of another portion of the corrugated sheets form a depressed structure; or the plurality of corrugated boards are the same in shape and structure, but the crests of each corrugated board form a planar structure and the troughs of each corrugated board form a concave structure.

According to the heat exchange core body for the total heat exchanger, the corrugated plate forming the heat exchange core body is in non-line contact with the heat conduction sheet, namely, the wave crest or the wave trough of the corrugated plate forms a non-sharp bending part, specifically, the corrugated plate can be in a plane structure or a concave structure. Therefore, fresh air cannot be mixed by turbid air, the air supply quality of a fresh air system is influenced, and unnecessary energy loss is avoided.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the utility model. The scope of applicability of the present invention is defined by the appended claims and their equivalents.

List of reference numerals:

10 total heat exchanger

11 first end cap

12 corner protector

13 heat exchange core

14 second end cap

15 first corrugated board

16 second corrugated board

17 right angle corner

18 non-right angle corner

19 first air flow

20 second air flow

21 thermally conductive sheet

22 airflow channel

23 leakage flow

24 sharp bend

25 non-sharp bend

26 straight section

27 reverse bending section

31 straight chamfered corner

32 arc chamfer angle

33 notched corner

34 inner groove corner

111 hem

112 gap

113 arc chamfering.

Claims (10)

1. A heat exchange core (13) for an enthalpy exchanger (10), characterized by:

the heat exchange core body (13) comprises a plurality of heat conduction sheets (21) made of full heat exchange materials and a plurality of corrugated plates made of plastic materials, the plurality of corrugated plates comprise a first corrugated plate (15) and a second corrugated plate (16), the first corrugated plate (15) and the adjacent heat conduction sheet (21) form an airflow channel (22) extending along a first airflow direction, the second corrugated plate (16) and the adjacent heat conduction sheet (21) form an airflow channel (22) extending along a second airflow direction, and the first airflow direction and the second airflow direction are crossed with each other,

wherein the peaks of at least one corrugated board comprise a planar or concave-like structure; and/or the trough of at least one corrugated board comprises a flat or concave-like structure.

2. A heat exchange core (13) for an enthalpy exchanger (10) according to claim 1, characterized in that:

the wave crest of at least one corrugated board forms a non-sharp bending part (25); and/or

The wave trough of at least one corrugated board forms a non-sharp bend (25).

3. A heat exchange core (13) for an enthalpy exchanger (10) according to claim 1, characterized in that:

the crests of the at least one corrugated board comprise planar structures and the troughs of the at least one corrugated board comprise concave-like structures; or

The crests of the at least one corrugated board comprise a concave-like structure and the troughs of the at least one corrugated board comprise a planar structure.

4. A heat exchange core (13) for an enthalpy exchanger (10) according to claim 3, characterized in that:

the planar structure includes a straight section (26).

5. A heat exchange core (13) for an enthalpy exchanger (10) according to claim 3, characterized in that:

the concave structure of the wave crest comprises a reverse bending section (27) which points opposite to the pointing direction of the wave crest; or the concave structure of the wave trough comprises reverse bending sections (27) which point opposite to the direction of the wave trough.

6. A heat exchanging core (13) for an enthalpy exchanger (10) according to any of claims 1-5, characterized in that:

the perpendicular projection of at least one corrugated board in the plane of the heat conducting sheet (21) comprises a first corner part and a first edge and a second edge which are adjacent to the first corner part, and the included angle formed by the first corner part and the second edge is inwards reduced towards the direction close to the center of the corrugated board.

7. A heat exchange core (13) for an enthalpy exchanger (10) according to claim 6, characterized in that:

the first corner is a straight chamfer corner (31), a rounded chamfer corner (32), a notch corner (33), or an inner groove corner (34) connecting the first and second edges.

8. A heat exchanging core (13) for an enthalpy exchanger (10) according to any of claims 1-5, characterized in that:

the plurality of corrugated boards are identical in structure and shape.

9. A heat exchange core (13) for an enthalpy exchanger (10) according to claim 8, characterized in that:

the outer contour of the heat conductive sheet (21) is the same as the outer contour of the corrugated board.

10. A heat exchanging core (13) for an enthalpy exchanger (10) according to any of claims 1-5, characterized in that:

the same corrugated board has a plurality of corners;

the plurality of corners may have the same shape, or two of the plurality of corners may have different shapes.

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