An air heat exchanger and electrical cabinet

Abstract

The application discloses an air heat exchanger and an electrical cabinet. The air heat exchanger is used for being installed on a first side wall of a cabinet body, and comprises a heat exchange core, a shell, an inner circulating fan and an outer circulating fan. The first side of the heat exchange core along an X-axis direction is provided with a first protruding part and a first recessed part along a Z-axis direction. The heat exchange core is provided with a plurality of inner circulating air ducts and outer circulating air ducts which are alternately arranged along a Y-axis direction. The inner circulating air duct is provided with a return air end and a supply air end. The outer circulating air duct is provided with an air inlet end and an air outlet end. The inner circulating fan is used for driving air to flow from a return air port to a supply air port. The outer circulating fan is used for driving air to flow from an air inlet port to an air outlet port. The inner circulating fan or the outer circulating fan is accommodated in the first recessed part. The shell is suitable for being embedded in the first side wall and is used for accommodating the heat exchange core. The electrical cabinet comprises the air heat exchanger. The air heat exchanger has high heat exchange efficiency.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation, specifically to an air heat exchanger and an electrical cabinet. Background Technology

[0002] Electrical cabinets typically house a large number of electrical devices that cannot operate in high-temperature environments for extended periods. To minimize the impact of external dust on the internal electrical equipment, electrical cabinets often employ a closed structure. Air heat exchangers can release heat from inside the cabinet to the external environment through heat exchange; therefore, air heat exchangers are commonly used for heat dissipation in electrical cabinets. An air heat exchanger includes a heat exchange core, an internal circulation cooling fan, and an external circulation cooling fan. The heat exchange core has an internal circulation duct that communicates with the inside of the electrical cabinet and an external circulation duct that communicates with the outside. The internal circulation cooling fan drives airflow in the internal circulation duct, and the external circulation cooling fan drives airflow in the external circulation duct. In the prior art, to avoid the internal circulation fan protruding inside the cabinet or the external circulation fan protruding outside the cabinet, the air heat exchanger is equipped with a partition to divide the inner cavity of the air heat exchanger into an inner region and an outer region. The internal circulation duct is located inside the air heat exchanger, and the external circulation duct is located outside the air heat exchanger. The internal circulation fan is located in the inner region and is positioned at the upper or lower end of the internal circulation duct, and the external circulation fan is located in the outer region and is positioned at the upper or lower end of the external circulation duct. However, the heat exchange efficiency of this type of air heat exchanger is low and cannot meet the heat dissipation requirements of the electrical cabinet. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects or problems in the prior art and to provide an air heat exchanger and an electrical cabinet, wherein the air heat exchanger has high heat exchange efficiency.

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

[0005] Technical Solution 1 and its related embodiments provide an air heat exchanger for installation in an electrical cabinet. The cabinet has a first sidewall perpendicular to the X-axis and includes a heat exchange core. The first sidewall along the X-axis has a first protrusion and a first recess relative to the protrusion, arranged along the Z-axis. It has several alternating internal and external circulation ducts along the Y-axis. The internal circulation ducts have a return air end and a supply air end, each return air end forming a return air inlet and each supply air end forming a supply air inlet, both located on the same side of the heat exchange core along the X-axis. The external circulation ducts have an inlet air end and an outlet air end, each inlet air end forming an inlet air inlet and each outlet air end forming an outlet air inlet. An internal circulation fan is fixed relative to the heat exchange core and drives air to flow from the return air inlet to the supply air inlet. Air vent; external circulation fan, which is fixed relative to the heat exchange core and used to drive air to flow from the air inlet to the air outlet; the internal circulation fan or external circulation fan is housed in the first recessed portion, when the internal circulation fan is housed in the first recessed portion, one of the return air inlet and the air supply inlet is located on the first protrusion and the other is located on the first recessed portion; when the external circulation fan is housed in the first recessed portion, one of the air inlet and the air outlet is located on the first protrusion and the other is located on the first recessed portion; housing, which is adapted to be embedded in the first side wall and used to house the heat exchange core, the portion of which is located inside the cabinet is provided with a first air vent and a second air vent respectively corresponding to the air supply inlet and the return air inlet, and the portion of which is located outside the cabinet is provided with a third air vent communicating with the air inlet and a fourth air vent communicating with the air outlet.

[0006] Based on technical solution one, technical solution two is also provided. In technical solution two and its related embodiments, the internal circulation fan is housed in the first recessed portion; the wall between the first protrusion and the first recessed portion forms a first guide wall, and the first recessed portion is provided with a first mounting wall perpendicular to the X-axis direction for installing the internal circulation fan; the external circulation duct includes a first external heat conduction duct, which is located on the first side of the heat exchange core along the X-axis direction and includes a plurality of first sub-external ducts spaced apart along the X-axis direction and extending along the Z-axis direction corresponding to the first protrusion and a second sub-external duct corresponding to the first recessed portion, the second sub-external duct connecting each of the first sub-external ducts; the first guide wall and the first mounting wall form the duct wall of the second sub-external duct.

[0007] Based on technical solution two, there is also technical solution three. In technical solution three and its related embodiments, the first guide wall is inclined relative to the X-axis direction and the Z-axis direction.

[0008] Based on technical solution three, technical solution four is also provided. In technical solution four and its related embodiments, the air inlet end and the air outlet end are respectively formed at the bottom end and the top end of the heat exchange core along the Z-axis direction; the external circulation air duct also includes a second external heat conduction air duct located on the second side of the first external heat conduction air duct along the X-axis direction. The second external heat conduction air duct includes several third sub-external air ducts that extend parallel to each other along the Z-axis direction. The two ends of the third sub-external air ducts are respectively connected to the air inlet end and the air outlet end; the ends of the first sub-external air duct and the second sub-external air duct that are far apart from each other are respectively connected to the air outlet end and the air inlet end, or respectively connected to the air inlet end and the air outlet end.

[0009] Based on any one of technical solutions one to four, a fifth technical solution is also provided. In the fifth technical solution and its related embodiments, the shell and the second side of the heat exchange core along the X-axis direction further cooperate to form an air collecting cavity. The air collecting cavity is connected to the internal circulation air duct to form an internal air duct. The internal circulation air duct includes a first air passage and a second air passage. The first air passage includes a plurality of first sub-air passages arranged along the Z-axis direction and extending along the X-axis direction. One end of the first sub-air passage is connected to the air collecting cavity, and the other end is connected to the air supply end. The second air passage includes a plurality of second sub-air passages arranged along the Z-axis direction and extending along the X-axis direction. One end of the second sub-air passage is connected to the air collecting cavity, and the other end is connected to the return air end.

[0010] Based on technical solution five, there is also technical solution six. In technical solution six and its related embodiments, the heat exchange core is provided with a detachable dust collection plate at the bottom of the air collection chamber along the Z-axis direction.

[0011] Based on technical solution six, technical solution seven is also provided. In technical solution seven and its related embodiments, the first recess is located below the first protrusion; the ends of the first sub-external air duct and the second sub-external air duct that are far apart from each other are respectively connected to the air outlet end and the air inlet end; a first interval and a second interval are respectively formed between the bottom end and the top end of the shell and the heat exchange core along the Z-axis direction; the external circulation fan is located in the second interval, 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 end and the side of the first interval, and the fourth air outlet is located on the second side of the second interval.

[0012] Based on technical solution two or three, there is also technical solution eight. In technical solution eight and its related embodiments, the heat exchange core is provided with a second protrusion and a second recess relative to the second protrusion on the second side along the X-axis direction. The air inlet is formed on one of the second protrusion and the second recess, and the air outlet is formed on the other of the second protrusion and the second recess. The external circulation fan is placed in the second recess.

[0013] Based on technical solution eight, technical solution nine is also provided. In technical solution nine and its related embodiments, the first recess is located at the bottom end of the heat exchange core along the Z-axis direction, and the second recess is located at the top end of the heat exchange core along the Z-axis direction; the air inlet is formed on the second protrusion, and the air outlet is formed on the second recess.

[0014] Based on technical solution nine, technical solution ten is also provided. In technical solution ten and its related embodiments, the wall between the second protrusion and the second recess forms a second guide wall, and the second recess is provided with a second mounting wall perpendicular to the X-axis direction for the installation of the external circulation fan; the first external heat conduction air duct also includes a plurality of fourth sub-external air ducts spaced apart along the Z-axis direction and extending along the X-axis direction, each fourth sub-external air duct having one end connected to the air outlet and the other end connected to a first sub-external air duct; the external circulation air duct also includes a third external heat conduction air duct located on the second side of the heat exchange core along the X-axis direction, the third external heat conduction air duct including a plurality of fifth sub-external air ducts spaced apart along the X-axis direction and extending along the Z-axis direction corresponding to the second protrusion and a sixth sub-external air duct corresponding to the second recess, the fifth sub-external air ducts connecting to the air inlet and the sixth sub-external air duct connecting each fifth sub-external air duct and the air outlet; the second guide wall and the second mounting wall form the air duct wall of the fifth sub-external air duct.

[0015] Based on technical solution ten, there is also technical solution eleven. In technical solution eleven and its related embodiments, the first guide wall and the second guide wall are both inclined outward from top to bottom.

[0016] Based on technical solution eleven, technical solution twelve is also provided. In technical solution twelve and its related embodiments, the internal circulation air duct includes several first sub-heat-conducting air ducts, several second sub-heat-conducting air ducts, and several third sub-heat-conducting air ducts. Each first sub-heat-conducting air duct is arranged at intervals along the X-axis and extends along the Z-axis. Each second sub-heat-conducting air duct is arranged along the Z-axis and extends along the X-axis and connects to the air supply end. Each third sub-heat-conducting air duct is arranged along the Z-axis and extends along the X-axis and connects to the air return end. The top end of the first sub-heat-conducting air duct is connected to or forms a gap with a third sub-heat-conducting air duct, and the bottom end of the first sub-heat-conducting air duct is connected to or forms a gap with a second sub-heat-conducting air duct.

[0017] Based on any one of technical solutions nine to twelve, a technical solution thirteen is also provided. In technical solution thirteen and its related embodiments, a first gap is formed between the bottom end of the shell and the heat exchange core along the Z-axis direction; the third air outlet is connected to the first gap; and the fourth air outlet corresponds to the external circulation fan.

[0018] Technical solution fourteen 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 one to thirteen; the cabinet body is provided with a first side wall perpendicular to the X-axis direction, and the housing 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.

[0019] As can be seen from the above description of the present invention and its preferred embodiments, 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:

[0020] Through continuous observation, experimentation, and research, the applicant has come to the conclusion that the reason for the "poor heat exchange efficiency of the air heat exchanger" in the existing technical solution is that, in order to prevent the internal circulation fan from protruding from the cabinet, the structure of the air heat exchanger is designed such that the internal circulation duct and the external circulation duct can only exchange heat through a partition, resulting in poor heat exchange efficiency.

[0021] In technical solution one and its preferred embodiments, the internal and external circulation ducts are alternately arranged along the Y-axis. Compared with the prior art where the internal and external circulation ducts exchange heat through a baffle, the heat exchange area is larger and the heat exchange efficiency is higher. Furthermore, the return air inlet and the supply air inlet are both located on the same side of the heat exchange core along the X-axis. The overall path of the internal circulation duct is also longer than that of the straight-through internal circulation duct in the prior art, resulting in greater air resistance and a longer residence time of the internal circulation airflow within the duct. This step improves heat exchange efficiency, but it should be understood that although the air resistance of the internal circulation duct increases, the air velocity of the internal circulation duct is still relatively high. The internal or external circulation fan is placed in the first recess, with the casing housing the heat exchange core. When the internal circulation fan is housed in the first recess, it does not protrude from the cabinet; instead, it is embedded within the heat exchange core, fully utilizing its structure. This is based on the fact that both the return air end and the supply air end of the internal circulation duct are located on the first side of the heat exchange core along the X-axis direction. This design achieves both concealed installation of the internal circulation fan and efficient use of the space above or below the internal circulation fan along the Z-axis to create air ducts, enhancing heat exchange. The ingenious structure, compared to designs where the return and supply ends of the internal circulation duct are located on the first side of the heat exchange core along the X-axis, resulting in the internal circulation fan protruding from the heat exchange core, reduces the space occupied by the air heat exchanger in the X-axis direction and increases the heat exchange area of ​​both the internal and external circulation ducts. Similarly, when the external circulation fan is housed in the first recess, i.e., embedded within the heat exchange core, it fully utilizes the structure of the heat exchange core, achieving concealed installation of the external circulation fan. It also fully utilizes the space above and below the external circulation fan along the Z-axis to create air ducts, enhancing heat exchange. The ingenious structure, compared to designs where the external circulation fan is located at the top or bottom of the heat exchange core along the Z-axis, further reduces the space occupied by the air heat exchanger in the Z-axis direction and increases the heat exchange area of ​​both the internal and external circulation ducts.

[0022] In the second technical solution and its preferred embodiment, the first external heat conduction air duct structure cleverly utilizes the structure of the first protrusion and the first recess to increase the heat exchange area. The first external heat conduction air duct includes several first sub-external air ducts that are spaced apart along the X-axis and extend along the Z-axis. Compared with the technical solution where the first external heat conduction air duct only includes one first sub-external air duct, the heat exchange area is larger, which further increases the heat exchange efficiency of the internal circulation air duct and the external circulation air duct.

[0023] In technical solution three and its preferred embodiments, the first guide wall is inclined relative to the X-axis and Z-axis directions, which is beneficial for guiding the external circulation airflow in the first external heat conduction air duct, and also beneficial for guiding the internal circulation airflow.

[0024] In technical solution four and its preferred embodiments, the air inlet and air outlet are formed at the bottom and top of the heat exchange core along the Z-axis, respectively, so that the air inlet is at the bottom and the air outlet is at the top of the external circulation air duct, which is more conducive to preventing the hot air at the air outlet of the external circulation air duct from re-entering the air inlet; the second external heat conduction air duct includes several parallel third sub-external air ducts extending along the Z-axis, and the two ends of the third sub-external air duct are connected to the air inlet and the air outlet, respectively. Compared with the solution in which only one third sub-external air duct is formed in the second external heat conduction air duct, the heat exchange area is larger, which further increases the heat exchange efficiency of the internal circulation air duct and the external circulation air duct.

[0025] In technical solution five and its preferred embodiments, the arrangement of the first air passage, the air collecting cavity, and the second air passage makes the overall path of the inner air passage U-shaped, resulting in a longer path for the internal circulating airflow. Compared to a solution without an air collecting cavity and where the inner air passage includes multiple U-shaped pipes, the air resistance is lower. Therefore, the internal circulating airflow can fully exchange heat with the external circulating air passage, thereby improving the heat exchange efficiency of the heat exchange core. Specifically, the first air passage includes several first sub-air passages arranged along the Z-axis and extending along the X-axis, and the second air passage includes several second sub-air passages arranged along the Z-axis and extending along the X-axis. Compared to a first air passage containing only one first sub-air passage... Compared to a design with only one second sub-air duct, the first and second air ducts have larger heat exchange areas, further increasing the heat exchange efficiency of both the internal and external circulation air ducts. The fact that both the first and second sub-air ducts extend along the X-axis also makes it easier for dust to accumulate in the internal circulation air ducts, rather than accumulating there, thus further improving the heat exchange efficiency of both ducts. Furthermore, this design allows the first and second sub-air ducts to form a straight ventilation channel, facilitating manufacturing and reducing air resistance. Therefore, the structural design of the heat exchange core in this technical solution can significantly improve the heat exchange efficiency of the heat exchange core and even the air heat exchanger including it.

[0026] Because the airflow entering each of the second sub-air ducts through the return air end is at different heights along the Z-axis, the airflow temperature in each of the second sub-air ducts is not consistent. If the airflow in the second sub-air duct flows directly to the first sub-air duct, i.e., without a collection chamber, and the second sub-air duct is connected to the first sub-air duct through a separate sub-air duct, then the internal circulation airflow temperature at the air supply end corresponding to each first sub-air duct will also be inconsistent, resulting in poor temperature uniformity. When the heat exchanger is used in an electrical cabinet, this will undoubtedly affect the heat dissipation of the electrical equipment inside the cabinet. The setting of a collection chamber... This design allows the airflow from each of the second sub-air passages to mix thoroughly before flowing into the first sub-air passage, avoiding large temperature differences at each air supply end and greatly improving the temperature uniformity of the internal circulation airflow. In other words, in this technical solution, the air collection chamber can work with the first and second air passages to make the internal air passage form a U-shape. Compared with solutions that include multiple U-shaped pipes in the internal air passage, this design results in lower air resistance, increases the heat exchange efficiency of the heat exchanger, and also allows the internal circulation airflow at each of the second sub-air passages to mix thoroughly, improving the temperature uniformity of the air supply end of the internal circulation air passage.

[0027] In technical solution six and its preferred embodiment, the heat exchange core is provided with a detachable dust collection plate at the bottom of the air collection cavity along the Z-axis. Dust falls to the bottom of the air collection cavity under the action of gravity. In practical applications, when dust in the internal circulation air duct is collected in the air collection cavity, the air collection cavity can be cleaned periodically as needed, thereby avoiding dust blockage and affecting the heat exchange efficiency of the heat exchange core.

[0028] In technical solution seven and its preferred embodiments, the setting of the first and second intervals improves the protection of the external circulation duct and facilitates the installation of the external circulation fan. The setting of the first interval also ensures that the air inlet of each external circulation duct can be air-intake. The third air outlet is set at the bottom and side of the first interval, and the fourth air outlet is set on the second side of the second interval. This facilitates the formation of a structure where the part of the shell located outside the cabinet forms a bottom air inlet and a side air outlet, which improves the protection of the external circulation duct, makes it less prone to dust accumulation in the external circulation duct, and makes the air outlet of the fourth air outlet discharge upwards, making it less likely to enter the third air outlet and cause a heat island effect. The first recess is located below the first protrusion, so the air supply port of the internal circulation duct and the air outlet of the external circulation duct are far apart from each other along the Z-axis, which is more conducive to achieving sufficient heat exchange between the internal and external circulation ducts.

[0029] In the eighth technical solution and its preferred embodiment, the second protrusion and the second recess are provided so that both the internal circulation fan and the external circulation fan are embedded in the heat exchange core, which enhances heat exchange. The structure is ingenious and also reduces the space occupied by the air heat exchanger in the X-axis and Z-axis directions, and increases the heat exchange area of ​​the internal circulation duct and the external circulation duct.

[0030] In technical solution nine and its preferred embodiment, the first recess is located at the bottom end of the heat exchange core along the Z-axis direction, and the second recess is located at the top end of the heat exchange core along the Z-axis direction. Therefore, the internal circulation fan and the external circulation fan are far apart from each other along the Z-axis direction, which is more conducive to achieving sufficient heat exchange between the internal circulation duct and the external circulation duct. The air inlet is formed on the second protrusion, and the air outlet is formed on the second recess, so that the air outlet of the external circulation duct is located above the air inlet, which is more conducive to preventing the hot air from the air outlet from re-entering the air inlet.

[0031] In technical solution ten and its preferred embodiment, the first external heat-conducting air duct further includes several fourth sub-external air ducts spaced apart along the Z-axis and extending along the X-axis. Each fourth sub-external air duct is connected to an air outlet at one end and to a first sub-external air duct at the other end. Therefore, the first external heat-conducting air duct is L-shaped as a whole, with a long external circulation airflow path, a large heat exchange area, and higher heat exchange efficiency of the internal and external circulation air ducts. The structure of the third external heat-conducting air duct cleverly utilizes the structure of the second protrusion and the second recess to increase the heat exchange area. The third external heat-conducting air duct includes several fifth sub-external air ducts spaced apart along the X-axis and extending along the Z-axis. Compared with the technical solution where the third external heat-conducting air duct only includes one fifth sub-external air duct, the heat exchange area is larger, further increasing the heat exchange efficiency of the internal and external circulation air ducts.

[0032] In technical solution eleven and its preferred embodiment, both the first guide wall and the second guide wall are inclined outward from top to bottom. On the one hand, this allows for a larger space in both the first and second recesses to install cooling fans, which is more conducive to production and processing. On the other hand, it is beneficial to guide the external and internal airflow.

[0033] In technical solution 12 and its preferred embodiments, the internal circulation air duct increases the heat exchange area, thereby improving the heat exchange efficiency. The top end of the first sub-heat-conducting air duct is connected to or forms a gap with a third sub-heat-conducting air duct, and the bottom end of the first sub-heat-conducting air duct is connected to or forms a gap with a second sub-heat-conducting air duct. When both ends of the first sub-heat-conducting air duct are connected to the second and third sub-heat-conducting air ducts, the internal circulation air duct forms several U-shaped pipes with low air resistance. When they are not connected, splicing does not need to be considered, which is more conducive to production and processing.

[0034] In the thirteenth technical solution and its preferred embodiment, a first gap is formed between the shell and the first end of the heat exchange core along the Z-axis direction, and the third air outlet is connected to the first gap. The setting of the first gap also ensures that the air inlet end of each external circulation air duct can be aired.

[0035] Technical solution fourteen has the technical advantages of any one of technical solutions one through thirteen. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the electrical cabinet in Embodiment 1 of this application;

[0038] Figure 2 This is a partial schematic diagram of the heat exchange core of Embodiment 1 of this application;

[0039] Figure 3 for Figure 1 The left view;

[0040] Figure 4 for Figure 3 Sectional view along the AA direction;

[0041] Figure 5 for Figure 3 Sectional view in the BB direction;

[0042] Figure 6 This is a schematic diagram of the heat exchange core in Embodiment 2 of this application. Figure 1 ;

[0043] Figure 7 This is a schematic diagram of the heat exchange core in Embodiment 2 of this application. Figure 2 ;

[0044] Figure 8 Cross-sectional view of Embodiment 2 of this application Figure 1 ;

[0045] Figure 9 Cross-sectional view of Embodiment 2 of this application Figure 2 .

[0046] Explanation of key figure labels:

[0047] Cabinet 100; First side wall 101; Air heat exchanger 200; Heat exchange core 10; First protrusion 11; First guide wall 111; First recess 12; First mounting wall 121; Air collection chamber 13; Dust collection plate 131; Internal circulation air duct 14; First air passage duct 141; First sub-air passage duct 1411; Air supply end 1412; Second air passage duct 142; Second sub-air passage duct 1421; Return air end 1422; Air supply port 01; Return air port 02; First sub-heat conduction air duct 143; Second sub-heat conduction air duct 144; Third sub-heat conduction air duct 145; External circulation air duct 15; First external heat conduction air duct 151; First sub- External air duct 1511; Second sub-external air duct 1512; Fourth sub-external air duct 1513; Second external heat conduction air duct 152; Third sub-external air duct 1521; Air inlet 153; Air outlet 154; Air inlet 03; Air outlet 04; Third external heat conduction air duct 155; Fifth sub-external air duct 1551; Sixth sub-external air duct 1552; Second protrusion 16; Second guide wall 161; Second recess 17; Second mounting wall 171; Housing 20; First air outlet 21; Second air outlet 22; Third air outlet 23; Fourth air outlet 24; First gap 25; Second gap 26; Internal circulation fan 30; External circulation fan 40. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0049] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0050] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0051] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0052] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0053] In the claims and the description other than the embodiments, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" only refer to a feature having one of the aforementioned directions being perpendicular to a feature having another direction, and do not require that they 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 both the Y-axis direction and the Z-axis direction. The X-axis direction can be divided into left and right, the Y-axis direction into front and back, and the Z-axis direction into up and down.

[0054] Example 1

[0055] See Figure 1 , Figure 1 An electrical cabinet is shown, including a cabinet body 100 and an air heat exchanger 200. In practical applications, the electrical cabinet also includes electrical equipment housed within the cabinet body 100. The cabinet body 100 forms a sealed structure to improve the protection of the electrical equipment. The air heat exchanger 200 is mounted on the cabinet body 100 and is used to dissipate heat from the electrical equipment. The cabinet body 100 is generally rectangular, with its length direction along the X-axis, its width direction along the Y-axis, and its height direction along the Z-axis. The cabinet body 100 has a first side wall 101 perpendicular to the X-axis.

[0056] See Figure 2-5 An air heat exchanger 200 is installed on the first side wall 101 and includes a heat exchange core 10, a shell 20, an internal circulation fan 30, and an external circulation fan 40.

[0057] The heat exchange core 10 is generally rectangular. The heat exchange core 10 has a first protrusion 11 and a first recess 12 that is recessed relative to the first protrusion 11 on the first side along the X-axis and along the Z-axis. The first recess 12 is located below the first protrusion 11. The wall between the first protrusion 11 and the first recess 12 forms a first flow guide wall 111. The first flow guide wall 111 is inclined relative to the X-axis and Z-axis directions. Figure 5In the middle, the first guide wall 111 slopes outward from top to bottom. The first recess 12 is provided with a first mounting wall 121 perpendicular to the X-axis for mounting the internal circulation fan 30. The heat exchange core 10 is provided with a plurality of internal circulation air ducts 14 and external circulation air ducts 15 arranged alternately along the Y-axis.

[0058] See Figure 4 The internal circulation duct 14 is provided with a return air end 1422 and an air supply end 1412. Each return air end 1422 forms a return air inlet 02, and each air supply end 1412 forms an air supply inlet 01. The return air inlet 02 and the air supply inlet 01 are both located on the same side of the heat exchange core 10 along the X-axis direction. In this embodiment, the return air inlet 02 and the air supply inlet 01 are both located on the first side of the heat exchange core 10 along the X-axis direction. One of the return air inlet 02 and the air supply inlet 01 is located on the first protrusion 11, and the other is located on the first recess 12. In this embodiment, the air supply inlet 01 is located on the first recess 12, and the return air inlet 02 is located on the first protrusion 11. However, it should be understood that in other embodiments, the return air inlet 02 is located on the first recess 12, and the air supply inlet 01 is located on the first protrusion 11. On a protrusion 11; in this embodiment, the housing 20 is used to accommodate and cooperate with the second side of the heat exchange core 10 along the X-axis direction to form an air collection cavity 13. The air collection cavity 13 is connected to the internal circulation air duct 14 to form an internal air duct. The internal circulation air duct 14 includes a first air passage duct 141 and a second air passage duct 142. The first air passage duct 141 includes a plurality of first sub-air passage ducts 1411 arranged along the Z-axis direction and extending along the X-axis direction. One end of the first sub-air passage duct 1411 is connected to the air collection cavity 13, and the other end is connected to the air supply end 1412. The second air passage duct 142 includes a plurality of second sub-air passage ducts 1421 arranged along the Z-axis direction and extending along the X-axis direction. One end of the second sub-air passage duct 1421 is connected to the air collection cavity 13, and the other end is connected to the return air end 1422. The heat exchange core 10 is provided with a detachable dust collection plate 131 at the bottom of the air collection cavity 13 along the Z-axis direction.

[0059] See Figure 5The external circulation duct 15 is provided with an air inlet 153 and an air outlet 154, which are respectively formed at the bottom and top of the heat exchange core 10 along the Z-axis direction. Each air inlet 153 forms an air inlet 03, and each air outlet 154 forms an air outlet 04. The external circulation duct 15 includes a first external heat conduction duct 151 and a second external heat conduction duct 152. The first external heat conduction duct 151 is located on the first side of the heat exchange core 10 along the X-axis direction and includes a plurality of first sub-external air ducts 1511 that are spaced apart along the X-axis direction and extend along the Z-axis direction, corresponding to the first protrusion 11, and a second sub-external air duct 1512 that corresponds to the first recess 12. Each of the first sub-external air ducts 1511 is connected. The ends of the first sub-external air ducts 1511 and the second sub-external air ducts 1512 that are far apart from each other are respectively connected to the air outlet 154 and the air inlet 153. However, it should be understood that when the first protrusion 11 is located below the first recess 12, the ends of the first sub-external air ducts 1511 and the second sub-external air ducts 1512 that are far apart from each other are respectively connected to the air inlet 153 and the air outlet 154. The first guide wall 111 and the first mounting wall 121 form the air duct wall of the second sub-external air duct 1512.

[0060] The second external heat conduction air duct 152 is located on the second side of the first external heat conduction air duct 151 along the X-axis direction. The second external heat conduction air duct 152 includes several third sub-external air ducts 1521 that extend parallel to each other along the Z-axis direction. The two ends of the third sub-external air ducts 1521 are respectively connected to the air inlet end 153 and the air outlet end 154.

[0061] The housing 20 is adapted to be embedded in the first side wall 101 and is used to accommodate the heat exchange core 10 and the external circulation fan 40. The portion of the housing 20 located inside the cabinet 100 is provided with a first air outlet 21 and a second air outlet 22 corresponding to the air supply outlet 01 and the air return outlet 02, respectively. The portion of the housing 20 located outside the cabinet 100 is provided with a third air outlet 23 communicating with the air inlet 03 and a fourth air outlet 24 communicating with the air outlet 04. In this embodiment, the length of the housing 20 along the X-axis is greater than that of the heat exchange core 10 so as to match the second side wall 40 along the X-axis of the heat exchange core 10. The shell 20 is assembled to form an air collection cavity 13. The length of the shell 20 along the Y-axis is similar to the length of the heat exchange core 10 along the Y-axis. The height of the shell 20 along the Z-axis is higher than that of the heat exchange core 10. The top and bottom ends of the shell 20 and the heat exchange core 10 along the Z-axis form a first interval 25 and a second interval 26, 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 third air outlet 23 is located at the bottom and side of the first interval 25, and the fourth air outlet 24 is located on the second side of the second interval.

[0062] The internal circulation fan 30 is fixed relative to the heat exchange core 10 and is used to drive the air from the return air port 02 to the supply air port 01. In this embodiment, the internal circulation fan 30 is housed in the first recess 12, installed on the first mounting wall 121, and passes through the first air port 21.

[0063] The external circulation fan 40 is fixed relative to the heat exchange core 10 and is used to drive the air to flow from the air inlet 03 to the air outlet 04. In this embodiment, the external circulation fan 40 is placed in the second interval 26 and is lower than the fourth air outlet 24, that is, the fourth air outlet 24 is higher than the external circulation fan 40.

[0064] In this embodiment, the internal circulation duct 14 and the external circulation duct 15 are alternately arranged along the Y-axis. Compared with the prior art where the internal circulation duct 14 and the external circulation duct 15 exchange heat through a partition, the heat exchange area is large and the heat exchange efficiency is high. On this basis, the return air port 02 and the supply air port 01 are both located on the same side of the heat exchange core 10 along the X-axis. The overall path of the internal circulation duct 14 is also longer than that of the straight-through internal circulation duct 14 in the prior art, resulting in greater wind resistance and a longer residence time of the internal circulation airflow in the internal circulation duct 14, further improving the heat exchange efficiency. However, it should be understood that although the wind resistance of the internal circulation duct 14 is increased, the airflow velocity in the internal circulation duct 14 is still relatively fast. The internal circulation fan 30 is placed in the first recess 12, and the housing 20 accommodates the heat exchange core 10, thus realizing the internal circulation. The circulating fan 30 does not protrude from the cabinet 100. The internal circulating fan 30 is embedded in the heat exchange core 10, making full use of the structure of the heat exchange core 10. With the supply and return ends of the internal circulating air duct 14 located on the first side of the heat exchange core 10 along the X-axis, it not only achieves the concealed installation of the internal circulating fan 30, but also makes full use of the space above or below the internal circulating fan 30 along the Z-axis to set up the air duct, enhancing heat exchange. The structure is ingenious. Compared with the solution where the supply and return ends of the internal circulating air duct 14 are located on the first side of the heat exchange core 10 along the X-axis, and the internal circulating fan 30 protrudes from the heat exchange core 10, it also reduces the space occupied by the air heat exchanger 200 in the X-axis direction and increases the heat exchange area of ​​the internal circulating air duct 14 and the external circulating air duct 15.

[0065] In this embodiment, the structure of the first external heat conduction air duct 151 cleverly utilizes the structure of the first protrusion 11 and the first recess 12 to increase the heat exchange area. The first external heat conduction air duct 151 includes several first sub-external air ducts 1511 that are spaced apart along the X-axis and extend along the Z-axis. Compared with the technical solution where the first external heat conduction air duct 151 only includes one first sub-external air duct 1511, the heat exchange area is larger, which further increases the heat exchange efficiency of the internal circulation air duct 14 and the external circulation air duct 15.

[0066] In this embodiment, the first guide wall 111 is inclined relative to the X-axis and Z-axis directions, which is beneficial for guiding the external circulating airflow in the first external heat conduction air duct 151 and also beneficial for guiding the internal circulating airflow.

[0067] In this embodiment, the air inlet 153 and the air outlet 154 are respectively formed at the bottom and top of the heat exchange core 10 along the Z-axis direction, so that the air inlet is at the bottom and the air outlet is at the top of the external circulation duct 15, which is more conducive to preventing the hot air from the air outlet 154 of the external circulation duct 15 from re-entering the air inlet 153; the second external heat conduction duct 152 includes several third sub-external air ducts 1521 that extend parallel to each other along the Z-axis direction. The two ends of the third sub-external air duct 1521 are respectively connected to the air inlet 153 and the air outlet 154. Compared with the scheme in which only one third sub-external air duct 1521 is formed in the second external heat conduction duct 152, the heat exchange area is larger, which further increases the heat exchange efficiency of the internal circulation duct 14 and the external circulation duct 15.

[0068] In this embodiment, the arrangement of the first air passage 141, the air collecting cavity 13, and the second air passage 142 makes the overall path of the inner air passage U-shaped, resulting in a longer path for the internal circulating airflow. Compared to a scheme without the air collecting cavity 13, where the inner air passage includes multiple U-shaped pipes, the air resistance is lower. Therefore, the internal circulating airflow can fully exchange heat with the external circulating air passage 15, thereby improving the heat exchange efficiency of the heat exchange core 10. Specifically, the first air passage 141 includes several first sub-air passages 1411 arranged along the Z-axis and extending along the X-axis, and the second air passage 142 includes several second sub-air passages 1421 arranged along the Z-axis and extending along the X-axis. Compared to the first air passage 141 having only one first sub-air passage 1411, the second air passage... In the scheme where only one second sub-air passage 1421 is provided, the heat exchange area of ​​the first air passage 141 is larger, and the heat exchange area of ​​the second air passage 142 is also larger, thereby further increasing the heat exchange efficiency of the internal circulation air passage 14 and the external circulation air passage 15. Since each first sub-air passage 1411 and each second sub-air passage 1421 extends in the X-axis direction, dust in the internal circulation air passage is less likely to accumulate in the first and second sub-air passage 1411 and 1421, but is more likely to collect in the air collection chamber 13, thereby further improving the heat exchange efficiency of the internal circulation air passage 14 and the external circulation air passage 15. Furthermore, the above arrangement allows the first and second sub-air passage 1411 and 1421 to form a straight ventilation duct, which is easier to manufacture and has lower air resistance. Therefore, the structural arrangement of the heat exchange core 10 in this technical solution can effectively improve the heat exchange efficiency of the heat exchange core 10 and even the air heat exchanger including the heat exchange core 10.

[0069] Because the airflow entering each of the second sub-air passages 1421 through the return air end 1422 is at different heights along the Z-axis, the airflow temperature of each of the second sub-air passages 1421 is not consistent. If the airflow of the second sub-air passage 1421 flows directly to the first sub-air passage 1411, i.e., without a collecting chamber 13, and the second sub-air passage 1421 is connected to the first sub-air passage 1411 through a separate sub-air passage, then the temperature of the internal circulating airflow at the air supply end 1412 corresponding to each of the first sub-air passages 1411 will also be inconsistent, resulting in poor temperature uniformity. When the heat exchanger is used in an electrical cabinet, it will undoubtedly affect the heat dissipation of the electrical equipment inside the cabinet. The arrangement of the air chamber 13 allows the airflow from each of the second sub-air passages 1421 to mix thoroughly before flowing into the first sub-air passage 1411, avoiding large temperature differences between the air supply ends 1412 and greatly improving the temperature uniformity of the internal circulation airflow. In other words, in this technical solution, the air chamber 13 can work with the first air passage 141 and the second air passage 142 to make the internal air passage form a U-shape. Compared with the solution where the internal air passage includes multiple U-shaped pipes, the air resistance is smaller, increasing the heat exchange efficiency of the heat exchanger. It can also allow the internal circulation airflow from each of the second sub-air passages to mix thoroughly, improving the temperature uniformity of the air supply end 1412 of the internal circulation air passage 14.

[0070] In this embodiment, the heat exchange core 10 is provided with a detachable dust collection plate 131 at the bottom of the air collection cavity 13 along the Z-axis direction. Dust falls to the bottom of the air collection cavity 13 under the action of gravity. In practical applications, when the dust in the internal circulation air duct 14 is collected in the air collection cavity 13, the air collection cavity 13 can be cleaned periodically as needed, thereby avoiding dust blockage and affecting the heat exchange efficiency of the heat exchange core 10.

[0071] In this embodiment, the arrangement of the first interval 25 and the second interval 26 improves the protection of the external circulation duct 15 and facilitates the placement of the external circulation fan 40. The arrangement of the first interval 25 also ensures that the air inlet 153 of each external circulation duct 15 can receive air. The third air outlet 23 is located at the bottom and side of the first interval 25, and the fourth air outlet 24 is located on the second side of the second interval 26. This facilitates the formation of a bottom air inlet and side air outlet structure for the portion of the housing 20 located outside the cabinet 100, which improves the protection of the external circulation duct 15, making it less prone to dust accumulation. It also ensures that the air outlet of the fourth air outlet 24 is discharged upwards, making it less likely to enter the third air outlet 23 and cause a heat island effect. The first recess 12 is located below the first protrusion 11, so the air supply port 01 of the internal circulation duct 14 and the air outlet 04 of the external circulation duct 15 are far apart from each other along the Z-axis, which is more conducive to achieving sufficient heat exchange between the internal circulation duct 14 and the external circulation duct 15.

[0072] Example 2

[0073] This embodiment has a basically the same structure as Embodiment 1, except that, see [link to Embodiment 1]. Figure 6-9The air heat exchanger 200 has the following structural differences:

[0074] 1. In this embodiment, the air heat exchanger 200 does not have an air collection chamber 13. The heat exchange core 10 also has a first protrusion 11 and a first recess 12. The internal circulation air duct 14 forms a return air end 1422 on the first protrusion 11 and an air supply end 1412 on the first recess 12. Each return air end 1422 forms a return air inlet 02, and each air supply end 1412 forms an air supply inlet 01. See also... Figure 6-7 The heat exchange core 10 has a second protrusion 16 and a second recess 17 recessed relative to the second protrusion 16 arranged on the second side along the X-axis direction and along the Z-axis direction. An air inlet 03 is formed on one of the second protrusion 16 and the second recess 17, and an air outlet 04 is formed on the other of the second protrusion 16 and the second recess 17. In this embodiment, the air inlet 03 is formed on the second protrusion 16, and the air outlet 04 is formed on the second recess 17. The wall between the second protrusion 16 and the second recess 17 forms a second guide wall 161. The second recess 17 has a second mounting wall 171 perpendicular to the X-axis direction for mounting the external circulation fan 40. The first recess 12 is located at the bottom end of the heat exchange core 10 along the Z-axis direction, and the second recess 17 is located at the top end of the heat exchange core 10 along the Z-axis direction. Both the first guide wall 111 and the second guide wall 161 are inclined outwards from top to bottom.

[0075] II. The internal circulation air duct 14 is different from that in Example 1.

[0076] In this embodiment, see Figure 8 The internal circulation air duct 14 includes several first sub-heat-conducting air ducts 143, several second sub-heat-conducting air ducts 144, and several third sub-heat-conducting air ducts 145. Each first sub-heat-conducting air duct 143 is arranged at intervals along the X-axis and extends along the Z-axis. Each second sub-heat-conducting air duct 144 is arranged along the Z-axis and extends along the X-axis and connects to the air supply end 1412. Each third sub-heat-conducting air duct 145 is arranged along the Z-axis and extends along the X-axis and connects to the air return end 1422. The top end of the first sub-heat-conducting air duct 143 is connected to or forms a gap with a third sub-heat-conducting air duct 145, and the bottom end of the first sub-heat-conducting air duct 143 is connected to or forms a gap with a second sub-heat-conducting air duct 144.

[0077] 3. The external circulation duct 15 is different from that in Example 1.

[0078] In this embodiment, see Figure 9The first external heat-conducting air duct 151 includes, in addition to the first sub-external air duct 1511 and the second sub-external air duct 1512, several fourth sub-external air ducts 1513 spaced apart along the Z-axis and extending along the X-axis. Each fourth sub-external air duct 1513 is connected at one end to the air outlet 154 and at the other end to a first sub-external air duct 1511. The external circulation air duct 15 also includes a third external heat-conducting air duct 155 located on the second side of the heat exchange core 10 along the X-axis. The air duct 155 includes a plurality of fifth sub-external air ducts 1551 that are spaced apart along the X-axis and extend along the Z-axis, corresponding to the second protrusion 16, and a sixth sub-external air duct 1552 that corresponds to the second recess 17. The fifth sub-external air ducts 1551 are connected to the air inlet end 153, and the sixth sub-external air duct 1552 are connected to each of the fifth sub-external air ducts 1551 and the air outlet end 154. The second guide wall 161 and the second mounting wall 171 form the air duct wall of the sixth sub-external air duct 1552.

[0079] IV. The shell structure is different.

[0080] In this embodiment, a second gap is no longer formed between the top end of the housing 20 and the heat exchange core 10, and a first gap 25 is formed between the housing 20 and the bottom end of the heat exchange core 10 along the Z-axis direction; the third air outlet 23 is connected to the first gap 25.

[0081] IV. The external circulation fan 40 is placed in the second recess 17 and is mainly installed on the second mounting wall 171.

[0082] In this embodiment, the external circulation fan 40 is placed in the second recess 17, that is, the external circulation fan 40 is embedded in the heat exchange core 10. This makes full use of the structure of the heat exchange core 10, realizes the hidden installation of the external circulation fan 40, and makes full use of the space above and below the external circulation fan 40 along the Z-axis to set up the air duct, which enhances heat exchange. The structure is ingenious. Compared with the solution where the external circulation fan 40 is located at the top or bottom of the heat exchange core 10 along the Z-axis, it also reduces the space occupied by the air heat exchanger 200 in the Z-axis direction and increases the heat exchange area of ​​the internal circulation air duct 14 and the external circulation air duct 15. Therefore, in this embodiment, the second protrusion 16 and the second recess 17 are provided so that the internal circulation fan 30 and the external circulation fan 40 are both embedded in the heat exchange core 10, which enhances heat exchange. The structure is ingenious and also reduces the space occupied by the air heat exchanger 200 in the X-axis and Z-axis directions, and increases the heat exchange area of ​​the internal circulation duct 14 and the external circulation duct 15.

[0083] In this embodiment, the first recess 12 is located at the bottom end of the heat exchange core 10 along the Z-axis, and the second recess 17 is located at the top end of the heat exchange core 10 along the Z-axis. Therefore, the internal circulation fan 30 and the external circulation fan 40 are far apart from each other along the Z-axis, which is more conducive to achieving sufficient heat exchange between the internal circulation duct 14 and the external circulation duct 15. The air inlet 03 is formed on the second protrusion 16, and the air outlet 04 is formed on the second recess 17, so that the air outlet 04 of the external circulation duct 15 is located above the air inlet 03, which is more conducive to preventing the hot air from the air outlet 04 from re-entering the air inlet 03.

[0084] In this embodiment, the first external heat-conducting air duct 151 further includes several fourth sub-external air ducts 1513 spaced apart along the Z-axis and extending along the X-axis. Each fourth sub-external air duct 1513 is connected to an air outlet 154 at one end and to a first sub-external air duct 1511 at the other end. Therefore, the first external heat-conducting air duct 151 is L-shaped as a whole, with a long external circulation airflow path and a large heat exchange area, resulting in higher heat exchange efficiency for the internal circulation air duct 14 and the external circulation air duct 15. The structure of the third external heat-conducting air duct 155 cleverly utilizes the structure of the second protrusion 16 and the second recess 17 to increase the heat exchange area. The third external heat-conducting air duct 155 includes several fifth sub-external air ducts 1551 spaced apart along the X-axis and extending along the Z-axis. Compared with the technical solution where the third external heat-conducting air duct 155 only includes one fifth sub-external air duct 1551, the heat exchange area is larger, further increasing the heat exchange efficiency of the internal circulation air duct 14 and the external circulation air duct 15.

[0085] In this embodiment, both the first guide wall 111 and the second guide wall 161 are inclined outward from top to bottom. On the one hand, this allows the first recess 12 and the second recess 17 to have a larger space to install the cooling fan, which is more conducive to production and processing. On the other hand, it is conducive to guiding the external circulation airflow and the internal circulation airflow.

[0086] In this embodiment, the internal circulation air duct 14 increases the heat exchange area, thereby improving the heat exchange efficiency. The top end of the first sub-heat-conducting air duct 143 is connected to or forms a gap with a third sub-heat-conducting air duct 145, and the bottom end of the first sub-heat-conducting air duct 143 is connected to or forms a gap with a second sub-heat-conducting air duct 144. When both ends of the first sub-heat-conducting air duct 143 are connected to the second sub-heat-conducting air duct 144 and the third sub-heat-conducting air duct 145, the internal circulation air duct 14 forms several U-shaped pipes with low air resistance. When they are not connected, splicing does not need to be considered, which is more conducive to production and processing.

[0087] In this embodiment, a first gap 25 is formed between the shell 20 and the first end of the heat exchange core 10 along the Z-axis direction; the third air outlet 23 is connected to the first gap 25, and the setting of the first gap 25 also ensures that the air inlet end 153 of each external circulation air duct 15 can be aired.

[0088] It should be understood that when the first side of the heat exchange core 10 along the X-axis is the outer side of the heat exchange core 10, the external circulation fan 40 is housed in the first recess 12. When the heat exchange core 10 does not have the second protrusion 16 and the second recess 17, the internal circulation fan 30 protrudes from the second side of the heat exchange core 10 along the X-axis. One of the air inlet 03 and the air outlet 04 is located on the first protrusion 11, and the other is located on the first recess 12. This allows the air inlet 03 to be located at the bottom of the heat exchange core 10, and the air outlet 04 to be located on the first side of the heat exchange core 10 along the X-axis. The fan 40 is placed in the first recess 12, that is, the external circulation fan 40 is embedded in the heat exchange core 10. This makes full use of the structure of the heat exchange core 10, realizes the hidden installation of the external circulation fan 40, and makes full use of the space above and below the external circulation fan 40 along the Z-axis to set up the air duct, which enhances heat exchange. The structure is ingenious. Compared with the scheme where the external circulation fan 40 is located at the top or bottom of the heat exchange core 10 along the Z-axis, it also reduces the space occupied by the air heat exchanger 200 in the Z-axis direction and increases the heat exchange area of ​​the internal circulation air duct 14 and the external circulation air duct 15.

[0089] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. An air heat exchanger (200) for installation in a cabinet (100) of an electrical cabinet, said cabinet (100) having a first sidewall (101) perpendicular to the X-axis direction, characterized in that, include The heat exchange core (10) has a first protrusion (11) and a first recess (12) that is recessed relative to the first protrusion (11) arranged along the Z-axis on its first side along the X-axis. It has a plurality of internal circulation air ducts (14) and external circulation air ducts (15) arranged alternately along the Y-axis. The internal circulation air duct (14) has a return air end (1422) and an air supply end (1412). Each return air end (1422) forms a return air inlet (02), and each air supply end (1412) forms an air supply inlet (01). The return air inlet (02) and the air supply inlet (01) are both located on the same side of the heat exchange core (10) along the X-axis. The external circulation air duct (15) has an air inlet end (153) and an air outlet end (154). Each air inlet end (153) forms an air inlet (03), and each air outlet end (154) forms an air outlet (04). An internal circulation fan (30) is fixed relative to the heat exchange core (10) and is used to drive air from the return air inlet (02) to the supply air inlet (01); An external circulation fan (40) is fixed relative to the heat exchange core (10) and is used to drive air from the air inlet (03) to the air outlet (04); the internal circulation fan (30) or the external circulation fan (40) is housed in the first recess (12). When the internal circulation fan (30) is housed in the first recess (12), one of the return air inlet (02) and the supply air inlet (01) is located on the first protrusion (11), and the other is located on the first recess (12); when the external circulation fan (40) is housed in the first recess (12), one of the air inlet (03) and the air outlet (04) is located on the first protrusion (11), and the other is located on the first recess (12); and The housing (20) is adapted to be embedded in the first side wall (101) and used to accommodate the heat exchange core (10). The part of the housing located inside the cabinet (100) is provided with a first air outlet (21) and a second air outlet (22) corresponding to the air supply outlet (01) and the air return outlet (02), respectively. The part of the housing located outside the cabinet (100) is provided with a third air outlet (23) communicating with the air inlet (03) and a fourth air outlet (24) communicating with the air outlet (04).

2. An air heat exchanger (200) as described in claim 1, characterized in that, The internal circulation fan (30) is housed in the first recess (12); the wall between the first protrusion (11) and the first recess (12) forms a first guide wall (111), and the first recess (12) is provided with a first mounting wall (121) perpendicular to the X-axis direction for mounting the internal circulation fan (30); the external circulation duct (15) includes a first external heat conduction duct (151), and the first external heat conduction duct (151) is located in the heat exchange core (1 0) A first side along the X-axis direction includes a plurality of first sub-external air ducts (1511) that are spaced apart along the X-axis direction and extend along the Z-axis direction, corresponding to the first protrusion (11), and a second sub-external air duct (1512) that corresponds to the first recess (12). The second sub-external air duct (1512) connects each of the first sub-external air ducts (1511). The first guide wall (111) and the first mounting wall (121) form the air duct wall of the second sub-external air duct (1512).

3. An air heat exchanger (200) as described in claim 2, characterized in that, The first guide wall (111) is inclined relative to the X-axis and Z-axis directions.

4. An air heat exchanger (200) as described in claim 3, characterized in that, The air inlet (153) and air outlet (154) are respectively formed at the bottom and top of the heat exchange core (10) along the Z-axis direction; The external circulation duct (15) further includes a second external heat conduction duct (152) located on the second side of the first external heat conduction duct (151) along the X-axis direction. The second external heat conduction duct (152) includes a plurality of third sub-external ducts (1521) extending parallel to each other along the Z-axis direction. The two ends of the third sub-external duct (1521) are respectively connected to the air inlet end (153) and the air outlet end (154). The ends of the first sub-external duct (1511) and the second sub-external duct (1512) that are far apart from each other are respectively connected to the air outlet end (154) and the air inlet end (153), or respectively connected to the air inlet end (153) and the air outlet end (154).

5. An air heat exchanger (200) as described in any one of claims 2-4, characterized in that, The shell (20) and the heat exchange core (10) on the second side along the X-axis direction also cooperate to form an air collecting cavity (13). The air collecting cavity (13) is connected to the internal circulation air duct (14) to form an internal air duct. The internal circulation air duct (14) includes a first air passage (141) and a second air passage (142). The first air passage (141) includes a plurality of first sub-air passages (1411) arranged along the Z-axis direction and extending along the X-axis direction. One end of the first sub-air passage (1411) is connected to the air collecting cavity (13), and the other end is connected to the air supply end (1412). The second air passage (142) includes a plurality of second sub-air passages (1421) arranged along the Z-axis direction and extending along the X-axis direction. One end of the second sub-air passage (1421) is connected to the air collecting cavity (13), and the other end is connected to the return air end (1422).

6. An air heat exchanger (200) as described in claim 5, characterized in that, The heat exchange core (10) has a detachable dust collection plate (131) at the bottom of the air collection chamber (13) along the Z-axis direction.

7. An air heat exchanger (200) as described in claim 6, characterized in that, The first recess (12) is located below the first protrusion (11); the ends of the first sub-external air duct (1511) and the second sub-external air duct (1512) that are far apart from each other are respectively connected to the air outlet (154) and the air inlet (153); the shell (20) and the heat exchange core (10) form a first interval (25) and a second interval (26) respectively between the bottom end and the top end along the Z-axis direction; the external circulation fan (40) is located in the second interval (26); 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 third air outlet (23) is located at the bottom end and the side of the first interval (25), and the fourth air outlet (24) is located on the second side of the second interval (26).

8. An air heat exchanger (200) as described in claim 2 or 3, characterized in that, The heat exchange core (10) has a second protrusion (16) on the second side along the X-axis and a second recess (17) that is recessed relative to the second protrusion (16) along the Z-axis. The air inlet (03) is formed on one of the second protrusion (16) and the second recess (17), and the air outlet (04) is formed on the other of the second protrusion (16) and the second recess (17); the external circulation fan (40) is placed in the second recess (17).

9. An air heat exchanger (200) as described in claim 8, characterized in that, The first recess (12) is located at the bottom end of the heat exchange core (10) along the Z-axis direction, and the second recess (17) is located at the top end of the heat exchange core (10) along the Z-axis direction; the air inlet (03) is formed on the second protrusion (16), and the air outlet (04) is formed on the second recess (17).

10. An air heat exchanger (200) as described in claim 9, characterized in that, The wall between the second protrusion (16) and the second recess (17) forms a second guide wall (161), and the second recess (17) is provided with a second mounting wall (171) perpendicular to the X-axis direction for the installation of the external circulation fan (40). The first external heat conduction air duct (151) also includes several fourth sub-external air ducts (1513) that are spaced apart along the Z-axis and extend along the X-axis. Each fourth sub-external air duct (1513) is connected to an air outlet (154) at one end and to a first sub-external air duct (1511) at the other end. The external circulation duct (15) further includes a third external heat conduction duct (155) located on the second side of the heat exchange core (10) along the X-axis direction. The third external heat conduction duct (155) includes a plurality of fifth sub-external ducts (1551) that are spaced apart along the X-axis direction and extend along the Z-axis direction, corresponding to the second protrusion (16), and a sixth sub-external duct (1552) that corresponds to the second recess (17). The fifth sub-external duct (1551) is connected to the air inlet end (153), and the sixth sub-external duct (1552) is connected to each fifth sub-external duct (1551) and the air outlet end (154). The second guide wall (161) and the second mounting wall (171) form the duct wall of the fifth sub-external duct (1551).

11. An air heat exchanger (200) as described in claim 10, characterized in that, The first guide wall (111) and the second guide wall (161) are both inclined outward from top to bottom.

12. An air heat exchanger (200) as described in claim 11, characterized in that, The internal circulation air duct (14) includes several first sub-heat-conducting air ducts (143), several second sub-heat-conducting air ducts (144), and several third sub-heat-conducting air ducts (145). Each first sub-heat-conducting air duct (143) is arranged at intervals along the X-axis and extends along the Z-axis. Each second sub-heat-conducting air duct (144) is arranged along the Z-axis and extends along the X-axis and connects to the air supply end (1412). Each third sub-heat-conducting air duct (145) is arranged along the Z-axis and extends along the X-axis and connects to the air return end (1422). The top end of the first sub-heat-conducting air duct (143) is connected to or forms a gap with a third sub-heat-conducting air duct (145). The bottom end of the first sub-heat-conducting air duct (143) is connected to or forms a gap with a second sub-heat-conducting air duct (144).

13. An air heat exchanger (200) as described in any one of claims 9-12, characterized in that, A first gap (25) is formed between the shell (20) and the bottom end of the heat exchange core (10) along the Z-axis direction; the third air outlet (23) is connected to the first gap (25); the fourth air outlet (24) corresponds to the external circulation fan (40).

14. An electrical cabinet, characterized in that, It includes a cabinet (100) and an air heat exchanger (200) as described in any one of claims 1-13; the cabinet (100) is provided with a first side wall (101) perpendicular to the X-axis direction, and the housing (20) is embedded in the first side wall (101); the first air vent (21) and the second air vent (22) are both located inside the cabinet (100), and the third air vent (23) and the fourth air vent (24) are both located outside the cabinet (100).

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