Heat exchange core and heat exchanger

Abstract

The utility model relates to the technical field of heat exchange devices, in particular to a heat exchange core and a heat exchanger. The heat exchange core comprises a connecting plate and a plurality of heat exchange units. Each heat exchange unit comprises a main plate and a plurality of heat exchange pipes, the ends of the heat exchange pipes are arranged on the main plate in a penetrating mode, the main plate is connected with the connecting plate, and the connecting plate is used for being connected with an air chamber of a heat exchanger. The heat exchange core body is composed of the multiple heat exchange units, the number of the heat exchange pipes of each heat exchange unit is smaller than the overall number of the heat exchange pipes of the heat exchange core body, and compared with the mode that all the heat exchange pipes are connected with the connecting plates, the heat exchange pipes are divided into multiple sets and connected with the connecting plates through the main plates, the strength of the connecting plates is improved through the main plates, and damage caused by too large thermal stress of the connecting plates is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange devices, in particular to a heat exchange core and a heat exchanger. Background Art

[0002] A heat exchanger typically consists of an air chamber, a shell, and a heat exchange core. The heat exchange core includes a connecting plate and multiple heat exchange tubes. The ends of the multiple heat exchange tubes are connected to the main plate, which is connected to the air chamber. The air chamber is connected to one end of the shell. The heat exchange core is located within the shell, and each heat exchange tube is connected to the air chamber. Heat exchangers typically need to withstand significant thermal stress. If all heat exchange tubes are connected to the same connecting plate, the connecting plate will be subjected to significant thermal stress, which can easily cause thermal fatigue failure at the connection between the connecting plate and the heat exchange tubes, making the connecting plate susceptible to damage. Utility Model Content

[0003] The purpose of the utility model is to provide a heat exchange core and a heat exchanger, so as to solve the technical problem of easy damage of the connecting plate in the prior art to a certain extent.

[0004] The utility model provides a heat exchange core, comprising: a connecting plate and a plurality of heat exchange units; each heat exchange unit comprises a main board and a plurality of heat exchange tubes, the ends of the plurality of heat exchange tubes are all passed through the main board, the main board is connected to the connecting plate, and the connecting plate can be used to connect to the air chamber of the heat exchanger.

[0005] The heat exchange core is composed of multiple heat exchange units. The number of heat exchange tubes in each heat exchange unit is less than the total number of heat exchange tubes in the heat exchange core. Compared with all heat exchange tubes being connected to the connecting plate, the heat exchange tubes are divided into multiple groups and connected to the connecting plate through the main board. The main board increases the strength of the connecting plate to avoid damage caused by excessive thermal stress on the connecting plate.

[0006] Furthermore, the main board includes a mounting plate and a buffer cylinder connected to the mounting plate; a plurality of mounting holes are provided on the mounting plate, and a plurality of heat exchange tubes are inserted into the mounting holes one by one; the cross-section of the buffer cylinder is annular, the height direction of the buffer cylinder is the same as the length direction of the heat exchange tube, and the buffer cylinder is provided with a buffer structure; the buffer cylinder is fixedly connected to the connecting plate.

[0007] Further, the buffer structure includes an annular groove provided on the outer wall of the buffer cylinder; and / or, the buffer structure includes a convex point provided on the buffer cylinder; and / or, the buffer structure includes a concave pit provided on the buffer cylinder.

[0008] Furthermore, the heat exchange unit also includes an inner air chamber, which is cylindrical in shape, and one end of the inner air chamber is connected to the buffer cylinder; a plurality of through holes are provided on the connecting plate, and the other end of the inner air chamber is clamped in the through hole, or the edge of the through hole is provided with a flange, and the flange is passed through the opening of the inner air chamber.

[0009] Furthermore, the inner air chamber includes a necking section, an expanding section, and an intermediate section connected between the necking section and the expanding section; the cross-sectional area of the necking section is smaller than the cross-sectional area of the expanding section, and corners are formed between the necking section and the intermediate section, as well as between the expanding section and the intermediate section; the necking section is clamped in the through hole, and the expanding section is connected to the buffer cylinder.

[0010] Furthermore, the corner formed between the narrowing section and the middle section and the corner formed between the expanding section and the middle section are both right angles.

[0011] Furthermore, the end of the buffer tube away from the mounting plate is sleeved on the outside of the inner air chamber, or the end of the buffer tube away from the mounting plate is inserted into the opening of the inner air chamber; or the end face of the end of the buffer tube away from the mounting plate is connected to the end face of the inner air chamber.

[0012] Furthermore, when a plurality of through holes are provided on the connecting plate, when the other end of the inner air chamber is clamped in the through hole, a flange is provided on the edge of the through hole, and the side wall of the inner air chamber contacts the flange.

[0013] The utility model provides a heat exchanger, comprising: an air chamber, a shell and the above-mentioned heat exchange core, the connecting plate is connected to the air chamber, the connecting plate is connected to the shell, and the heat exchange core is arranged in the shell.

[0014] Furthermore, the connecting plate includes a base plate and a support plate vertically arranged on the periphery of the base plate, the air chamber is connected to the outer wall of the support plate, and the shell is connected to the inner wall of the support plate.

[0015] It should be understood that both the foregoing general description and the following detailed description are for purposes of illustration and description and are not necessarily limiting of the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. Together, the description and the drawings serve to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a heat exchange core according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of a heat exchange unit in a heat exchange core according to another embodiment of the present invention;

[0019] Figure 3 for Figure 2 The schematic diagram of the structure of the inner air chamber and the main board in the heat exchange unit shown;

[0020] Figure 4 for Figure 2 A schematic structural diagram of the connecting plate in the heat exchange unit shown;

[0021] Figure 5 This is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;

[0022] Figure 6 This is a structural schematic diagram of a heat exchanger according to another embodiment of the present invention.

[0023] Icons: 1-connecting plate; 2-heat exchange unit; 3-air chamber; 4-shell; 21-main board; 22-heat exchange tube; 23-inner air chamber; 211-mounting plate; 212-buffer cylinder; 213-groove; 231-narrowing section; 232-expanding section; 233-middle section; 11-through hole; 12-flanged edge; 13-base plate; 14-support plate. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0026] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0030] like Figures 1 to 6 As shown, the utility model provides a heat exchange core, including: a connecting plate 1 and multiple (two or more) heat exchange units 2; each heat exchange unit 2 includes a main board 21 and multiple heat exchange tubes 22, and in each heat exchange unit 2, the ends of the multiple heat exchange tubes 22 are all passed through the main board 21, and the main board 21 is connected to the connecting plate 1 (the connection between the main board 21 and the connecting plate 1 can be achieved by welding, bonding, etc.), and the connecting plate 1 is used to connect to the air chamber 3 of the heat exchanger.

[0031] In this embodiment, the heat exchange core is composed of multiple heat exchange units 2, and the number of heat exchange tubes 22 in each heat exchange unit 2 is less than the total number of heat exchange tubes 22 in the heat exchange core. Compared with all the heat exchange tubes 22 being connected to the connecting plate 1, the heat exchange tubes 22 are divided into multiple groups and connected to the connecting plate 1 through the main board 21 (the connection method in this embodiment is welding, and other methods can also be bonding, etc.). The main board 21 increases the strength of the connecting plate 1 to avoid damage caused by excessive thermal stress on the connecting plate 1.

[0032] As an optional solution, in each heat exchange unit 2, there are two main boards 21, and the two ends of the heat exchange tube 22 are respectively passed through the two main boards 21. It can be understood that the main board 21 is provided with a mounting hole that allows the heat exchange tube 22 to pass through.

[0033] It should be noted that the number of heat exchange tubes 22 included in the multiple heat exchange units 2 may be different or the same.

[0034] like Figure 2 and Figure 3 As shown, based on the above embodiment, further, the main board 21 includes a mounting plate 211 and a buffer cylinder 212 connected to the mounting plate 211; a plurality of mounting holes are provided on the mounting plate 211, and a plurality of the heat exchange tubes 22 are inserted into the mounting holes one by one, the cross section of the buffer cylinder 212 is annular, the height direction of the buffer cylinder 212 is the same as the length direction of the heat exchange tube 22, and the buffer cylinder 212 is provided with a buffer structure; the buffer cylinder 212 is connected to the connecting plate 1.

[0035] In this embodiment, a buffer structure is provided on the buffer cylinder 212, which can adapt to the changes caused by the heat of the heat exchange tube 22 and release thermal stress, thereby further reducing the impact of thermal stress on the connecting plate 1 and further avoiding damage to the connecting plate 1.

[0036] The buffer structure can have various structural forms. For example, the buffer cylinder 212 includes a first section and a second section. One end of the first section is slidably disposed in the second section. The first section can slide relative to the second section to adapt to deformation caused by heat.

[0037] As an alternative, Figure 2 As shown, the buffer structure includes an annular groove 213 provided in the buffer cylinder 212. The groove 213 may be recessed from the outer peripheral wall of the buffer cylinder toward the inner peripheral wall of the buffer cylinder to avoid affecting the assembly of the outer side of the buffer cylinder with other components. The annular groove 213 is provided along the circumference of the buffer cylinder 212. The cross-sectional shape of the buffer cylinder 212 is annular (it should be noted that annular refers to a closed shape, which can be circular, quadrilateral, elliptical, or pentagonal, etc.), and the groove 213 is also annular. The axial direction of the annular groove 213 is the same as the axial direction of the annular buffer cylinder 212.

[0038] In this embodiment, the groove 213 is directly provided on the base plate 13 forming the buffer cylinder 212 to form a buffer structure, and then the base plate 13 is formed into a cylindrical structure for easy processing.

[0039] The cross-sectional shape of the groove 213 can be V-shaped, U-shaped, etc.

[0040] The number of the groove 213 may be one; the number of the groove 213 may also be multiple (two or more), and the multiple grooves 213 are arranged on the buffer cylinder 212 at intervals along the length direction of the heat exchange tube 22.

[0041] In other embodiments, the grooves 213 may also be intermittently arranged along the circumference of the buffer tube 212 , a plurality of grooves 213 (two or more) may be provided, and the plurality of grooves 213 may be spaced apart along the circumference of the buffer tube 212 .

[0042] The buffer structure may further include convex points arranged on the buffer cylinder, and the number of the convex points may be multiple (two or more).

[0043] The buffer structure includes pits arranged on the buffer cylinder, and the number of the pits can be multiple (two or more).

[0044] The buffer structure may include one or more of the above-mentioned forms.

[0045] It should be noted that both ends of the heat exchange tube 22 are connected to the main board 21, and both ends of the heat exchange tube 22 are provided with a connecting plate 1. The main board 21 is close to the heat exchange tube 22 relative to the connecting plate 1, and each connecting plate 1 is connected to an air chamber 3; that is, each heat exchange unit 2 includes two main boards 21, the heat exchange core includes two connecting plates 1, and the heat exchanger includes two air chambers 3.

[0046] like Figure 5 As shown, the buffer cylinder 212 can be directly connected to the connecting plate 1.

[0047] As an alternative, Figure 6 As shown, the heat exchange unit 2 also includes an inner air chamber 23; the inner air chamber 23 is cylindrical, and one end of the inner air chamber 23 is connected to the buffer cylinder 212; a plurality of through holes 11 are provided on the connecting plate 1, and the other end of the inner air chamber 23 is clamped in the through hole 11, or a flange 12 is provided on the edge of the through hole 11, and the flange 12 is inserted into the opening of the inner air chamber 23.

[0048] In this embodiment, after the heat exchanger is assembled, the inner air chamber 23 is at least partially (or partially or completely) located within the air chamber 3. Gas flows from the air chamber 3 into the multiple sub-air chambers 3, and then from the sub-air chambers 3 into the heat exchange tubes 22 of each heat exchange unit 2, thereby performing heat exchange. The provision of the inner air chamber 23 facilitates the assembly and installation of the heat exchange core.

[0049] It should be noted that the inner air chamber 23 may be provided at only one end of the heat exchange tube 22 . Alternatively, the inner air chamber 23 may be provided at both ends of the heat exchange tube 22 .

[0050] like Figures 2 to 4As shown, based on the above embodiment, further, the inner air chamber 23 includes a necking section 231, an expanding section 232 and an intermediate section 233 connected between the necking section 231 and the expanding section 232; the cross-sectional area of the necking section 231 is smaller than the cross-sectional area of the expanding section 232, and corners are formed between the necking section 231 and the intermediate section 233, as well as between the expanding section 232 and the intermediate section 233; the necking section 231 is clamped in the through hole 11, and the expanding section 232 is connected to the buffer cylinder.

[0051] In this embodiment, the extension direction of the necking section 231 and the extension direction of the expanding section 232 are both the same as the length direction of the heat exchange tube 22. A corner is formed between the middle section 233 and the necking section 231, and a corner is formed between the middle section 233 and the expanding section 232. Therefore, a structure for releasing thermal stress can also be formed between the middle section 233 and the necking section 231 and between the middle section 233 and the expanding section 232, thereby further reducing the influence of thermal stress on the connecting plate 1.

[0052] Optionally, the corner formed between the narrowing section 231 and the middle section 233 and the corner formed between the expanding section 232 and the middle section 233 are both approximately right angles, which facilitates processing and manufacturing.

[0053] In other embodiments, the corners may not be right angles, which can also reduce the impact of thermal stress on the connecting plate 1 .

[0054] like Figure 2 As shown, based on the above embodiment, the end of the buffer cylinder 212 away from the mounting plate 211 is further sleeved on the outside of the inner air chamber 23. Alternatively, the end of the buffer cylinder 212 away from the mounting plate 211 is inserted into the opening of the inner air chamber 23. Alternatively, the end surface of the end of the buffer cylinder 212 away from the mounting plate 211 is connected to the end surface of the inner air chamber 23 (understandably, this end surface is close to the buffer cylinder), wherein the connection can be achieved by welding, bonding, or clamping. Alternatively, a slot can be provided on the end surface of one of the buffer cylinder 212 and the inner air chamber 23, and the other end of the buffer cylinder 212 and the inner air chamber 23 can be inserted into the slot, or a protrusion can be provided on the end surface of the other end of the buffer cylinder 212 and the protrusion can be inserted into the slot, so as to achieve a snap connection between the buffer cylinder and the inner air chamber 23.

[0055] like Figure 2 As shown, on the basis of the above embodiment, further, when a plurality of through holes 11 are provided on the connecting plate 1, when the other end of the inner air chamber 23 is clamped in the through hole 11, a flange 12 is provided on the edge of the through hole 11, and the side wall of the inner air chamber 23 is in contact with the flange 12. This structure can make the connection between the inner air chamber 23 and the connecting plate 1 more stable and reliable.

[0056] In other embodiments, the edge of the through hole 11 may not be provided with a flange 12, and the necking section 231 of the inner air chamber 23 is located in the through hole 11; or, the inner air chamber 23 is not provided with a necking section 231, and a flange 12 is provided on the edge of the through hole 11, and the flange 12 is inserted into the inner air chamber 23 and fixedly connected to the inner air chamber 23.

[0057] like Figure 5 and Figure 6 As shown, an embodiment of the present invention further provides a heat exchanger, comprising the heat exchange core described in any of the above technical solutions, and further comprising an air chamber 3 and a shell 4, wherein the connecting plate 1 is connected to the shell 4, and the heat exchange core is disposed within the shell 4. The embodiment of the present invention includes the heat exchange core described in any of the above technical solutions, and thus has all the beneficial technical effects of the heat exchange core, which will not be described in detail here.

[0058] The positional relationship between the various components can be set as needed, for example, the shell 4 is wrapped around the heat exchange core; or the shell 4 wraps at least part of the air chamber 3 while wrapping the heat exchange core. Alternatively, the air chamber 3 wraps part of the outer side of the shell 4, etc. Figure 6 As shown, the connecting plate 1 includes a base plate 13 and a support plate 14 vertically arranged around the base plate 13. The air chamber 3 is connected to the support plate 14, and the shell 4 is connected to the inner wall of the support plate 14. The end of the shell 4 near the air chamber 3 and the end of the air chamber 3 near the shell 4 are both open. The inner wall of the shell 4 can be connected to the outer wall of the air chamber 3, and the inner wall of the air chamber 3 can be connected to the support plate 14; or the inner wall of the shell 4 can be connected to the outer wall of the support plate 14, and the inner wall of the support plate 14 can be connected to the outer wall of the air chamber 3; or the shell 4 can be provided with a bent portion, the bent portion being located between the air chamber 3 and the buffer cylinder, so that the inner wall of the shell 4 can be connected to the outer wall of the support plate 14 and the outer wall of the air chamber 3 respectively. This is just an example and not a limitation. Other connection structures are also possible and will not be described in detail here.

[0059] Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features therein may be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present invention. In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description. In addition, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present invention and to form different embodiments.

Claims

1. A heat exchange core, characterized in that: include: A connecting plate (1) and a plurality of heat exchange units (2); each heat exchange unit (2) comprises a main plate (21) and a plurality of heat exchange tubes (22); in each heat exchange unit (2), the ends of the plurality of heat exchange tubes (22) are all passed through the main plate (21); the main plate (21) is connected to the connecting plate (1); and the connecting plate (1) can be used to connect to the air chamber (3) of the heat exchanger.

2. The heat exchange core according to claim 1, characterized in that: The main board (21) comprises a mounting plate (211) and a buffer cylinder (212) connected to the mounting plate (211); the mounting plate (211) is provided with a plurality of mounting holes, and a plurality of the heat exchange tubes (22) are inserted into the mounting holes in a one-to-one correspondence; the cross section of the buffer cylinder (212) is annular; the height direction of the buffer cylinder (212) is the same as the length direction of the heat exchange tube (22); the buffer cylinder (212) is provided with a buffer structure; the buffer cylinder (212) is fixedly connected to the connecting plate (1).

3. The heat exchange core according to claim 2, characterized in that: The buffer structure comprises an annular groove (213) provided on the buffer cylinder (212); And / or, the buffer structure includes a convex point arranged on the buffer cylinder (212); And / or, the buffer structure includes a recess provided on the buffer cylinder (212).

4. The heat exchange core according to claim 2 or 3, characterized in that: The heat exchange unit (2) further includes an inner air chamber (23), the inner air chamber (23) being arranged in a cylindrical shape, and one end of the inner air chamber (23) being connected to the buffer cylinder (212); The connecting plate (1) is provided with a plurality of through holes (11), and the other end of the inner air chamber (23) is clamped in the through hole (11), or the edge of the through hole (11) is provided with a flange, and the flange penetrates into the opening of the inner air chamber (23).

5. The heat exchange core according to claim 4, characterized in that: The inner air chamber (23) comprises a constricted section (231), an expanded section (232), and an intermediate section (233) connected between the constricted section (231) and the expanded section (232); the cross-sectional area of the constricted section (231) is smaller than the cross-sectional area of the expanded section (232); corners are formed between the constricted section (231) and the intermediate section (233), as well as between the expanded section (232) and the intermediate section (233); the constricted section (231) is disposed in the through hole (11), and the expanded section (232) is connected to the buffer cylinder.

6. The heat exchange core according to claim 5, characterized in that: The corner formed between the narrowing section (231) and the middle section (233) and the corner formed between the expanding section (232) and the middle section (233) are both right angles.

7. The heat exchange core according to claim 4, characterized in that: One end of the buffer tube (212) away from the mounting plate (211) is sleeved on the outside of the inner air chamber (23), or one end of the buffer tube (212) away from the mounting plate (211) is inserted into the opening of the inner air chamber (23); Alternatively, the end surface of the buffer cylinder away from the mounting plate (211) is connected to the end surface of the inner air chamber.

8. The heat exchange core according to claim 7, characterized in that: When a plurality of through holes (11) are provided on the connecting plate (1), and the other end of the inner air chamber (23) is clamped in the through hole (11), a flange (12) is provided on the edge of the through hole (11), and the side wall of the inner air chamber (23) contacts the flange (12).

9. A heat exchanger, characterized in that: include: An air chamber (3), a shell (4) and a heat exchange core according to any one of claims 1 to 8, wherein the connecting plate (1) is connected to the air chamber (3), the connecting plate (1) is connected to the shell (4), and the heat exchange core is arranged in the shell (4).

10. The heat exchanger according to claim 9, characterized in that The connecting plate (1) comprises a base plate (13) and a support plate (14) vertically arranged around the base plate (13); the air chamber (3) is connected to the outer wall of the support plate (14); and the shell (4) is connected to the inner wall of the support plate (14).

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