Heat exchange core body, air heat exchanger and electrical cabinet

Abstract

The invention discloses a heat exchange core body, an air heat exchanger and an electrical cabinet, the heat exchange core body is provided with a plurality of inner circulation air ducts and outer circulation air ducts which are alternately arranged in the Y-axis direction, each inner circulation air duct is provided with a plurality of pipelines, and the two ends of each pipeline are opened in the first side of the heat exchange core body in the X-axis direction and form an air supply end and an air return end correspondingly; each air supply end and each air return end of each internal circulation air duct are arranged in the Z-axis direction. The outer circulation air channel penetrates through the heat exchange core in the Z-axis direction, and the two ends of the outer circulation air channel form an air inlet end and an air outlet end correspondingly. The air heat exchanger comprises the heat exchange core. The electrical cabinet comprises the air heat exchanger. The heat exchange efficiency is high.

Description

Technical Field

[0001] The invention relates to the field of heat dissipation, and in particular to a heat exchange core, an air heat exchanger and an electrical cabinet. Background Art

[0002] A large number of electrical equipment are usually placed in electrical cabinets. These electrical equipment cannot work for a long time in a high temperature environment. In order to reduce the impact of external dust on internal electrical equipment, electrical cabinets often use closed structures. The air heat exchanger can release the heat inside the electrical cabinet to the external environment through heat exchange. Therefore, electrical cabinets often use air heat exchangers to dissipate heat inside the electrical cabinet. The air heat exchanger includes a heat exchange core, which has an internal circulation duct connected to the inside of the cabinet and an external circulation duct connected to the outside. The internal circulation duct and the external circulation duct are arranged alternately. The internal circulation duct generally has a top air inlet and a side outlet, while the external circulation duct has a bottom air inlet and a side outlet. The airflow flows in opposite directions in the internal circulation duct and the external circulation duct to achieve heat exchange, but the heat exchange efficiency of this heat exchanger still cannot meet the heat exchange requirements of the electrical cabinet. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a heat exchange core, an air heat exchanger and an electrical cabinet with high heat exchange efficiency.

[0004] To achieve the above objectives, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Technical solution one and its related embodiments provide a heat exchange core, which is provided with a plurality of inner circulation air ducts and outer circulation air ducts alternately arranged along the Y-axis direction, and the inner circulation air ducts are provided with a plurality of pipes, both ends of the pipes are opened on the first side of the heat exchange core along the X-axis direction and respectively form an air supply end and a return air end, and each air supply end and each return air end of each inner circulation air duct are arranged along the Z-axis direction; the outer circulation air duct runs through the heat exchange core along the Z-axis direction and its two ends respectively form an air inlet end and an air outlet end.

[0006] Based on technical solution one, technical solution two is also provided. In technical solution two and its related embodiments, the duct is U-shaped, and is provided with a first section connected to the air supply end, a second section connected to the return air end, and a third section connected to the first section and the second section; the first section and the second section both extend along the X-axis direction, and the third section extends along the Z-axis direction; the first section and the second section in each internal circulation air duct are arranged along the Z-axis direction, and the third section is arranged along the X-axis direction.

[0007] Based on technical solution 2, technical solution 3 is also provided. In technical solution 3 and its related embodiments, a plurality of first sub-inner air ducts parallel to each other are provided in the first section, a plurality of second sub-inner air ducts parallel to each other are provided in the second section, and a plurality of third sub-inner air ducts parallel to each other are provided in the third section.

[0008] Based on technical solution three, technical solution four is also provided. In technical solution four and its related embodiments, the number of the first sub-inner air ducts, the second sub-inner air ducts and the third sub-inner air ducts are equal and correspond one to one, the first sub-inner air duct is connected to the corresponding third sub-inner air duct, and the second sub-inner air duct is connected to the corresponding third sub-inner air duct.

[0009] Based on technical solution three, technical solution five is also provided. In technical solution five and its related embodiments, a gap is formed between the first sub-inner air duct and the third sub-inner air duct, and a gap is formed between the second sub-inner air duct and the third sub-inner air duct.

[0010] Based on technical solution one, there is also provided technical solution six. In technical solution six and its related embodiments, a plurality of sub-external air ducts parallel to each other and extending along the Z-axis direction are provided in the external circulation air duct.

[0011] Technical solution seven and its related embodiments provide an air heat exchanger for installation in a cabinet of an electrical cabinet, the cabinet being provided with a first side wall perpendicular to the X-axis direction, including a heat exchange core, as described in any one of technical solutions one to six; each air supply end and each return air end of each internal circulation air duct respectively form an air supply port and a return air port, and each air inlet end and each air outlet end of each external circulation air duct respectively form an air inlet and an air outlet; a shell, which is embedded in the first side wall and is used to accommodate the heat exchange core, and its part located inside the cabinet is provided with a first air port connected to the air supply port and a second air port connected to the return air port, and its part located outside the cabinet is provided with a third air port connected to the air inlet and a fourth air port connected to the air outlet; a first heat dissipation fan, which is fixed relative to the shell and is used to drive wind from the return air port to the supply air port; and a second heat dissipation fan, which is fixed relative to the shell and is used to drive wind from the air inlet to the air outlet.

[0012] Based on Technical Solution Seven, Technical Solution Eight is also provided. In Technical Solution Eight and its related embodiments, the shell and the heat exchange core form a first interval and a second interval at the bottom and top ends along the Z-axis direction, respectively, and the third air outlet and the fourth air outlet are respectively connected to the first interval and the second interval; the third air outlet is located at the bottom of the shell along the Z-axis direction, and the fourth air outlet is located on the outside of the shell; the second heat dissipation fan is placed in the second interval, and the first heat dissipation fan is fixedly connected to the first air outlet of the shell.

[0013] Based on Technical Solution Eight, Technical Solution Nine is also provided. In Technical Solution Nine and its related embodiments, the third air outlet is located at the bottom and outer side of the first interval, and the fourth air outlet is located at the outer side of the second interval and is higher than the second cooling fan.

[0014] Technical solution ten and its related embodiments provide an electrical cabinet, which includes a cabinet body and an air heat exchanger as described in any one of technical solutions seven to nine; the cabinet body is provided with a first side wall perpendicular to the X-axis direction, and the shell is embedded in the first side wall; the first air outlet and the second air outlet are both located inside the cabinet body, and the third air outlet and the fourth air outlet are both located outside the cabinet body.

[0015] From the above description of the present invention and its preferred embodiments, it can be seen that, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] The applicant has learned through continuous observation, experimentation and research that the reason for the technical problem of "poor heat exchange efficiency of the heat exchanger" in the existing technical solutions is that after a long period of heat exchange in the heat exchanger, dust is easily accumulated at the top corner of the outer circulation air duct, and the heat exchange time of the inner circulation air duct is short, resulting in insufficient heat exchange.

[0017] In technical solution 1 and its preferred embodiment, the outer circulation air duct runs through the heat exchange core along the Z-axis direction and its two ends respectively form an air inlet end and an air outlet end, so that the wind resistance of the outer circulation air duct is small and dust is not easy to accumulate in the outer circulation air duct; the inner circulation air duct includes a plurality of pipes, both ends of which are opened at the first side of the heat exchange core along the X-axis direction and respectively form an air supply end and a return air end, and each air supply end and each return air end of each inner circulation air duct are arranged along the Z-axis direction, the wind resistance of the pipe is large, and the wind flow stays in the inner circulation air duct for a longer time when passing through the inner circulation air duct, but it should be understood that although the wind resistance of the pipe is increased, the wind speed of the air flow in the pipe is still Faster, because the inner circulation air duct and the outer circulation air duct are arranged alternately along the Y-axis direction, the inner circulation airflow can fully exchange heat with the outer circulation airflow, thereby improving the heat exchange efficiency; wherein, the inner circulation air duct is provided with a plurality of pipes and the structural design of the pipes also enables the airflow to flow through various parts of the inner circulation air duct when passing through the inner circulation air duct, avoiding the part far away from the first side of the heat exchange core along the X-axis direction from not passing through the air, thereby further improving the heat exchange efficiency of the inner circulation air duct and the outer circulation air duct; therefore, the outer circulation air duct of the technical solution is not easy to accumulate dust, and the heat exchange efficiency of the inner circulation air duct and the outer circulation air duct is high. (affects the heat exchange effect, heat exchange coefficient and heat exchange area, the higher the wind speed, the better)

[0018] In technical solution two and its preferred embodiment, the structural setting of the pipeline is not only conducive to production and processing compared to pipelines in other complex shapes, but also more conducive to achieving a balance between wind resistance and wind speed, thereby increasing the heat exchange efficiency of the inner circulation air duct and the outer circulation air duct.

[0019] In technical solution three and its preferred embodiment, a plurality of first sub-inner air ducts parallel to each other are provided in the first section, a plurality of second sub-inner air ducts parallel to each other are provided in the second section, and a plurality of third sub-inner air ducts parallel to each other are provided in the third section. Compared with the solution in which no sub-inner air ducts are provided in the pipeline, the heat exchange area of ​​the pipeline is larger, thereby further increasing the heat exchange efficiency of the internal circulation air duct and the external circulation air duct.

[0020] In technical solution 4 and its preferred embodiment, the first sub-inner air duct is connected to the corresponding third sub-inner air duct, and the second sub-inner air duct is connected to the corresponding third sub-inner air duct, which is beneficial to avoid excessive wind resistance.

[0021] In technical solution five and its preferred embodiments, a gap is formed between the first sub-inner air duct and the third sub-inner air duct, and a gap is formed between the second sub-inner air duct and the third sub-inner air duct. Compared with technical solution four, it is not necessary to connect the first sub-inner air duct and the third sub-inner air duct, nor is it necessary to connect the third sub-inner air duct and the second sub-inner air duct, which eliminates the splicing step and is conducive to processing. Moreover, when the internal circulating airflow enters the gap between the first sub-inner air duct and the second sub-inner air duct after passing through each first sub-inner air duct, it changes from laminar flow to turbulent flow and is mixed and evenly heated in the gap, and then changes to laminar flow after passing through each third sub-inner air duct, and then changes to turbulent flow after passing through the gap between the third sub-inner air duct and the second sub-inner air duct and is mixed and evenly heated in the gap, and finally changes to laminar flow after passing through each second sub-inner air duct. The turbulent flow at the gap increases the heat exchange efficiency at the corner of the U-shaped pipe and improves the temperature uniformity of the internal circulating airflow at each air outlet end.

[0022] In technical solution six and its preferred embodiment, a plurality of sub-external air ducts parallel to each other and extending along the Z-axis direction are provided in the external circulation air duct. Compared with the solution in which only one sub-external air duct is formed in the external circulation air duct, the heat exchange area of ​​the external circulation air duct is larger, thereby further increasing the heat exchange efficiency of the internal circulation air duct and the external circulation air duct.

[0023] Technical solution seven and its preferred embodiments have the technical advantages of any one of technical solutions one to six.

[0024] In technical solution eight and its preferred embodiments, the shell and the heat exchange core form a first interval and a second interval at the bottom and top along the Z-axis direction, respectively. The third air outlet and the fourth air outlet are connected to the first interval and the second interval, respectively. The setting of the first interval is beneficial to the air intake of the air inlet end of each external circulation air duct, and the setting of the second interval is beneficial to the placement of the second heat dissipation fan. Such a setting makes the third air outlet and the fourth air outlet located at the bottom and top of the shell, respectively. The air outlet of the fourth air outlet is discharged upward, and it is not easy to enter the third air outlet and cause a heat island effect.

[0025] In technical solution nine and its preferred embodiments, the third air outlet is located at the bottom and outer side of the first interval, which is conducive to increasing the air intake volume. The fourth air outlet is located at the outer side of the second interval and is higher than the second heat dissipation fan, which is conducive to forming a structure in which the part of the shell located outside the cabinet forms a bottom air inlet and side air outlet, thereby improving the protectiveness of the external circulation air duct and making the external circulation air duct less prone to dust accumulation.

[0026] Technical solution ten has the technical advantages of any one of technical solutions seven to nine. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of an electrical cabinet according to an embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of a heat exchange core according to an embodiment of the present application;

[0030] Figure 3 for Figure 1 Left view of;

[0031] Figure 4 for Figure 3 Section view in AA direction;

[0032] Figure 5 for Figure 3 Cross-sectional view in the BB direction;

[0033] Figure 6 for Figure 5 Cross-sectional view in CC direction;

[0034] Figure 7 for Figure 5 Cross-sectional view in DD direction.

[0035] Description of main reference numerals:

[0036] Cabinet 100; first side wall 101; air heat exchanger 200; heat exchange core 10; internal circulation air duct 11; pipeline 110; first section 111; first sub-inner air duct 1111; second section 112; second sub-inner air duct 1121; third section 113; third sub-inner air duct 1131; air supply end 114; air return end 115; air supply port 01; air return port 02; external circulation air duct 12; sub-external air duct 121; air inlet end 122; air outlet end 123; air inlet 03; air outlet 04; shell 20; first air outlet 21; second air outlet 22; third air outlet 23; fourth air outlet 24; first interval 25; second interval 26; first heat dissipation fan 30; second heat dissipation fan 40. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0039] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0040] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0041] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0042] In the claims and the specification except for the embodiments, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only mean that the feature with one of the above directions is perpendicular to the feature with another direction, and do not require that they must be implemented according to the "X-axis direction", "Y-axis direction" and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to the Y-axis direction and the Z-axis direction. Among them, the X-axis direction can be divided into left and right, the Y-axis direction can be divided into front and back, and the Z-axis direction can be divided into top and bottom.

[0043] See also Figure 1 , Figure 1 An electrical cabinet is shown, including a cabinet 100 and an air heat exchanger 200. In practical applications, the electrical cabinet also includes electrical equipment placed in the cabinet 100. A closed structure is formed inside the cabinet 100 to improve the protection of the electrical equipment. The air heat exchanger 200 is installed on the cabinet 100 and is used to dissipate heat from the electrical equipment. The cabinet 100 is in the shape of a rectangular parallelepiped as a whole, with its length direction being the X-axis direction, its width direction being the Y-axis direction, and its height direction being the Z-axis direction. The cabinet 100 is provided with a first side wall 101 perpendicular to the X-axis direction.

[0044] See also Figure 1-7 The air heat exchanger 200 is installed on the first side wall 101 , and includes a heat exchange core 10 , a shell 20 , a first heat dissipation fan 30 and a second heat dissipation fan 40 .

[0045] See also Figure 2 The heat exchange core 10 is in a rectangular shape, and is provided with a plurality of inner circulation air ducts 11 and outer circulation air ducts 12 alternately arranged along the Y-axis direction.

[0046] See also Figure 3-4 , Figure 6-7 The inner circulation air duct 11 is provided with a plurality of pipes 110, both ends of which are opened at the first side of the heat exchange core 10 along the X-axis direction and respectively form an air supply end 114 and an air return end 115, and each air supply end 114 and each air return end 115 of each inner circulation air duct 11 are arranged along the Z-axis direction; each air supply end 114 and each air return end 115 of each inner circulation air duct 11 respectively form an air supply port 01 and a return air port 02.

[0047] The duct 110 is U-shaped, and is provided with a first section 111 connected to the air supply end 114, a second section 112 connected to the return air end 115, and a third section 113 connecting the first section 111 and the second section 112; the first section 111 and the second section 112 both extend along the X-axis direction, and the third section 113 extends along the Z-axis direction; each first section 111 and each second section 112 in each internal circulation air duct 11 are arranged along the Z-axis direction, and each third section 113 is arranged along the X-axis direction.

[0048] A plurality of first sub-inner air ducts 1111 parallel to each other are provided in the first section 111, a plurality of second sub-inner air ducts 1121 parallel to each other are provided in the second section 112, and a plurality of third sub-inner air ducts 1131 parallel to each other are provided in the third section 113. In practical applications, heat exchange fins are respectively provided in the first section 111, the second section 112, and the third section 113 to form each first sub-inner air duct 1111, each second sub-inner air duct 1121, and each third sub-inner air duct 1131. In this embodiment, a gap is formed between the first sub-inner air duct 1111 and the third sub-inner air duct 1131, and a gap is formed between the second sub-inner air duct 1121 and the third sub-inner air duct 1131. However, it should be understood that in other embodiments, the number of the first sub-interior air duct 1111, the second sub-interior air duct 1121 and the third sub-interior air duct 1131 are equal and correspond one to one, the first sub-interior air duct 1111 and the corresponding third sub-interior air duct 1131 are connected, and the second sub-interior air duct 1121 and the corresponding third sub-interior air duct 1131 are connected.

[0049] See also Figure 5-7 The outer circulation air duct 12 penetrates the heat exchange core 10 along the Z axis direction and forms an air inlet end 122 and an air outlet end 123 at both ends thereof. Each air inlet end 122 and each air outlet end 123 of each outer circulation air duct 12 respectively forms an air inlet 03 and an air outlet 04. A plurality of sub-external air ducts 121 extending in parallel along the Z axis direction are provided in the outer circulation air duct 12. In practical applications, heat exchange fins are fixed in each outer circulation air duct 12 to form a plurality of sub-external air ducts 121.

[0050] See also Figure 1 , Figure 4-5 The shell 20 is embedded in the first side wall 101 and is used to accommodate the heat exchange core 10. The part located inside the cabinet 100 is provided with a first air outlet 21 connected to the air supply port 01 and a second air outlet 22 connected to the return air port 02. The part located outside the cabinet 100 is provided with a third air outlet 23 connected to the air inlet 03 and a fourth air outlet 24 connected to the air outlet 04. In this embodiment, the shell 20 is in the shape of a rectangular parallelepiped, and the length of the shell 20 along the X-axis direction is similar to the length of the heat exchange core 10 along the X-axis direction, and the length of the shell 20 along the Y-axis direction is similar to the length of the heat exchange core 10 along the Y-axis direction, but the height of the shell 20 along the Z-axis direction is higher than the heat exchange core 10, and the shell 20 and the heat exchange core 10 form a first interval 25 and a second interval 26 at the bottom and top ends along the Z-axis direction, respectively, and the third air outlet 23 and the fourth air outlet 24 are connected to the first interval 25 and the second interval 26, respectively; the third air outlet 23 is located at the bottom and outer side of the first interval 25, and the fourth air outlet 24 is located at the outer side of the second interval 26.

[0051] The first heat dissipation fan 30 is fixed relative to the housing 20 and is used to drive the air to flow from the return air port 02 to the supply air port 01 . In this embodiment, the first heat dissipation fan 30 is fixedly connected to the first air port 21 of the housing 20 .

[0052] The second cooling fan 40 is fixed relative to the housing 20 and is used to drive wind to flow from the air inlet 03 to the air outlet 04. In this embodiment, the second cooling fan 40 is placed in the second interval and lower than the fourth air outlet 24, that is, the fourth air outlet 24 is higher than the second cooling fan 40.

[0053] In this embodiment, the outer circulation air duct 12 penetrates the heat exchange core 10 along the Z-axis direction and forms an air inlet end 122 and an air outlet end 123 at its two ends, so that the wind resistance of the outer circulation air duct 12 is small and dust is not easy to accumulate in the outer circulation air duct 12; the inner circulation air duct 11 includes a plurality of pipes 110, both ends of which are opened at the first side of the heat exchange core 10 along the X-axis direction and form an air supply end 114 and an air return end 115, respectively, and each air supply end 114 and each air return end 115 of each inner circulation air duct 11 are arranged along the Z-axis direction. The wind resistance of the pipe 110 is large, and the wind flow stays in the inner circulation air duct 11 for a longer time when passing through the inner circulation air duct 11. However, it should be understood that although the wind resistance of the pipe 110 is increased, the air in the pipe 110 is The wind speed of the airflow is still relatively fast. Since the inner circulation air duct 11 and the outer circulation air duct 12 are alternately arranged along the Y-axis direction, the inner circulation airflow can fully exchange heat with the outer circulation airflow, thereby improving the heat exchange efficiency; wherein, the inner circulation air duct 11 is provided with a plurality of pipes 110 and the structural design of the pipes 110 also enables the airflow to flow through various parts of the inner circulation air duct 11 when passing through the inner circulation air duct 11, thereby avoiding the part away from the first side of the heat exchange core 10 along the X-axis direction from passing through the wind, thereby further improving the heat exchange efficiency of the inner circulation air duct 11 and the outer circulation air duct 12; therefore, the outer circulation air duct 12 of the present technical solution is not easy to accumulate dust, and the heat exchange efficiency of the inner circulation air duct 11 and the outer circulation air duct 12 is high.

[0054] In this embodiment, the structural setting of the pipeline 110 is not only conducive to production and processing compared to other complex shapes of the pipeline 110, but also more conducive to achieving a balance between wind resistance and wind speed, thereby increasing the heat exchange efficiency of the inner circulation air duct 11 and the outer circulation air duct 12.

[0055] In this embodiment, a plurality of first sub-inner air ducts 1111 parallel to each other are provided in the first section 111, a plurality of second sub-inner air ducts 1121 parallel to each other are provided in the second section 112, and a plurality of third sub-inner air ducts 1131 parallel to each other are provided in the third section 113. Compared with a solution in which no sub-inner air ducts are provided in the pipeline 110, the heat exchange area of ​​the pipeline 110 is larger, thereby further increasing the heat exchange efficiency of the inner circulation air duct 11 and the outer circulation air duct 12.

[0056] In this embodiment, a gap is formed between the first sub-inner air duct 1111 and the third sub-inner air duct 1131, and a gap is formed between the second sub-inner air duct 1121 and the third sub-inner air duct 1131. It is not necessary to connect the first sub-inner air duct 1111 with the third sub-inner air duct 1131, nor is it necessary to connect the third sub-inner air duct 1131 with the second sub-inner air duct 1121. The splicing step is omitted, which is beneficial to processing. In addition, the internal circulating airflow enters the first sub-inner air duct 1121 after passing through each first sub-inner air duct 1111. The laminar flow changes to turbulent flow in the gap between the U-shaped duct 110 and the second sub-inner duct 1111 and is mixed and evenly heated in the gap, and then changes to laminar flow through each third sub-inner duct 1131, and then changes to turbulent flow through the gap between the third sub-inner duct 1131 and the second sub-inner duct 1121 and is mixed and evenly heated in the gap, and finally changes to laminar flow through each second sub-inner duct 1121. The turbulent flow in the gap increases the heat exchange efficiency at the corner of the U-shaped duct 110 and improves the temperature uniformity of the internal circulating airflow at each air outlet end 123. In other embodiments, the first sub-inner duct 1111 is connected to the corresponding third sub-inner duct 1131, and the second sub-inner duct 1121 is connected to the corresponding third sub-inner duct 1131, which is conducive to avoiding excessive wind resistance.

[0057] In this embodiment, a plurality of sub-external air ducts 121 parallel to each other and extending along the Z-axis direction are provided in the external circulation air duct 12. Compared with a solution in which only one sub-external air duct 121 is formed in the external circulation air duct 12, the heat exchange area of ​​the external circulation air duct 12 is larger, thereby further increasing the heat exchange efficiency of the internal circulation air duct 11 and the external circulation air duct 12.

[0058] In this embodiment, the shell 20 and the heat exchange core 10 form a first interval 25 and a second interval 26 at the bottom and top of the Z-axis direction, respectively. The third air outlet 23 and the fourth air outlet 24 are connected to the first interval 25 and the second interval 26, respectively. The setting of the first interval 25 is conducive to the air intake of the air inlet end 122 of each external circulation air duct 12, and the setting of the second interval 25 is conducive to the placement of the second heat dissipation fan 40. Such a setting makes the third air outlet 23 and the fourth air outlet 24 located at the bottom and top of the shell 20, respectively. The air outlet of the fourth air outlet 24 is discharged upward and is not easy to enter the third air outlet 23 to cause a heat island effect. The third air outlet 23 is located at the bottom and the outer side of the first interval 25, which is conducive to increasing the air intake volume. The fourth air outlet 24 is located at the outer side of the second interval 26 and is higher than the second heat dissipation fan 40, which is conducive to forming a structure in which the part of the shell 20 located outside the cabinet forms a bottom air intake and a side air outlet, thereby improving the protection of the external circulation air duct and making the external circulation air duct less prone to dust accumulation.

[0059] The description of the above specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the enlightenment of the present invention or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent substitutions or other improvements to the embodiments of the present invention or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the present invention.

Claims

1. A heat exchange core (10), characterized in that: The heat exchange core (10) is provided with a plurality of inner circulation air ducts (11) and outer circulation air ducts (12) which are alternately arranged along the Y-axis direction; the inner circulation air duct (11) is provided with a plurality of pipes (110); both ends of the pipes (110) are open at a first side of the heat exchange core (10) along the X-axis direction and respectively form an air supply end (114) and an air return end (115); each air supply end (114) and each air return end (115) of each inner circulation air duct (11) is arranged along the Z-axis direction; the outer circulation air duct (12) passes through the heat exchange core (10) along the Z-axis direction and its two ends respectively form an air inlet end (122) and an air outlet end (123).

2. A heat exchange core (10) according to claim 1, characterized in that: The duct (110) is U-shaped, and is provided with a first section (111) connected to an air supply end (114), a second section (112) connected to an air return end (115), and a third section (113) connected to the first section (111) and the second section (112); the first section (111) and the second section (112) both extend along the X-axis direction, and the third section (113) extends along the Z-axis direction; each first section (111) and each second section (112) in each internal circulation air duct (11) are arranged along the Z-axis direction, and each third section (113) is arranged along the X-axis direction.

3. A heat exchange core (10) according to claim 2, characterized in that: The first section (111) is provided with a plurality of first sub-inner air ducts (1111) parallel to each other, the second section (112) is provided with a plurality of second sub-inner air ducts (1121) parallel to each other, and the third section (113) is provided with a plurality of third sub-inner air ducts (1131) parallel to each other.

4. A heat exchange core (10) according to claim 3, characterized in that: The number of the first sub-interior air duct (1111), the second sub-interior air duct (1121) and the third sub-interior air duct (1131) is equal and corresponds one to one, the first sub-interior air duct (1111) and the corresponding third sub-interior air duct (1131) are connected, and the second sub-interior air duct (1121) and the corresponding third sub-interior air duct (1131) are connected.

5. A heat exchange core (10) according to claim 3, characterized in that: A gap is formed between the first sub-inner air duct (1111) and the third sub-inner air duct (1131), and a gap is formed between the second sub-inner air duct (1121) and the third sub-inner air duct (1131).

6. A heat exchange core (10) according to claim 1, characterized in that: The outer circulation air duct (12) is provided with a plurality of sub-external air ducts (121) which are parallel to each other and extend along the Z-axis direction.

7. An air heat exchanger (200) for installation in a cabinet (100) of an electrical cabinet, wherein the cabinet (100) is provided with a first side wall (101) perpendicular to the X-axis direction, wherein: include A heat exchange core (10) as claimed in any one of claims 1 to 6; each air supply end (114) and each air return end (115) of each internal circulation air duct (11) respectively form an air supply port (01) and an air return port (02); each air inlet end (122) and each air outlet end (123) of each external circulation air duct (12) respectively form an air inlet (03) and an air outlet (04); A shell (20) is embedded in the first side wall (101) and is used to accommodate the heat exchange core (10), wherein the portion located inside the cabinet (100) is provided with a first air port (21) connected to the air supply port (01) and a second air port (22) connected to the air return port (02), and the portion located outside the cabinet (100) is provided with a third air port (23) connected to the air inlet (03) and a fourth air port (24) connected to the air outlet (04); A first heat dissipation fan (30), which is fixed relative to the housing (20) and is used to drive air to flow from the return air port (02) to the supply air port (01); and The second heat dissipation fan (40) is fixed relative to the housing (20) and is used to drive wind to flow from the air inlet (03) to the air outlet (04).

8. An air heat exchanger (200) according to claim 7, characterized in that: The shell (20) and the heat exchange core (10) respectively form a first interval (25) and a second interval (26) at the bottom and top ends along the Z-axis direction, and the third air outlet (23) and the fourth air outlet (24) are respectively connected to the first interval (25) and the second interval (26); the second heat dissipation fan (40) is placed in the second interval (26), and the first heat dissipation fan (30) is fixedly connected to the first air outlet (21) of the shell (20).

9. An air heat exchanger (200) according to claim 8, characterized in that: The third air outlet (23) is located at the bottom end and the outer side of the first interval (25), and the fourth air outlet (24) is located at the outer side of the second interval (26) and is higher than the second heat dissipation fan (40).

10. An electrical cabinet, characterized in that: It comprises a cabinet (100) and an air heat exchanger (200) according to any one of claims 7 to 9; the cabinet (100) is provided with a first side wall (101) perpendicular to the X-axis direction, and the shell (20) is embedded in the first side wall (101); the first air outlet (21) and the second air outlet (22) are both located inside the cabinet (100), and the third air outlet (23) and the fourth air outlet (24) are both located outside the cabinet (100).

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