Air heat exchanger and electrical cabinet

Abstract

The invention 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, the air heat exchanger comprises a heat exchange core body, a shell, an inner circulating fan and an outer circulating fan, and a first protruding part and a first concave part are distributed on a first side, in the X-axis direction, of the heat exchange core body in the Z-axis direction; the inner circulation air ducts and the outer circulation air ducts are alternately arranged in the Y-axis direction, and each inner circulation air duct is provided with an air return end and an air supply end; the outer circulating air duct is provided with an air inlet end and an air outlet end; the internal circulation fan is used for driving air to flow to the air supply port from the air return port; the outer circulating fan is used for driving air to flow from the air inlet to the air outlet; the inner circulating fan or the outer circulating fan is accommodated in the first sunken part; the shell is suitable for being embedded in the first side wall and used for containing the heat exchange core. The electrical cabinet comprises the air heat exchanger. The air heat exchanger is high in heat exchange efficiency.

Description

Technical Field

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

[0002] Electrical cabinets usually contain a large number of electrical equipment, which 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. Air heat exchangers can release the heat inside the cabinet to the external environment through heat exchange, so air heat exchangers are often used in electrical cabinets for heat dissipation. The 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 air duct connected to the inside of the electrical cabinet and an external circulation air duct connected to the outside. The internal circulation cooling fan can drive the air flow to flow in the internal circulation air duct, and the external circulation cooling fan can drive the air flow to flow in the external circulation air duct. In the prior art, in order to avoid the internal circulation fan from protruding inside the cabinet or to avoid the external circulation fan from protruding outside the cabinet, the air heat exchanger is provided with a partition to divide the inner cavity of the air heat exchanger into an inner area and an outer area, the inner circulation air duct is located on the inner side of the air heat exchanger, and the outer circulation air duct is located on the outer side of the air heat exchanger, the inner circulation air fan is located in the inner area and is placed at the upper end or lower end of the inner circulation air duct, and the outer circulation air fan is located in the outer area and is placed at the upper end or lower end of the outer circulation air duct, but the air heat exchanger with this structure has low heat exchange efficiency and cannot meet the heat dissipation 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 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 adopt 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 a cabinet of an electrical cabinet, wherein the cabinet is provided with a first side wall perpendicular to the X-axis direction, including a heat exchange core, wherein a first protrusion and a first recessed portion recessed relative to the first protrusion are arranged along the Z-axis direction on the first side along the X-axis direction, and a plurality of inner circulation air ducts and outer circulation air ducts alternately arranged along the Y-axis direction, wherein the inner circulation air duct is provided with a return air end and an air supply end, each return air end forms a return air port, each air supply end forms an air supply port, and the return air port and the air supply port are both located on the same side of the heat exchange core along the X-axis direction; the outer circulation air duct is provided with an air inlet end and an air outlet end, each air inlet end forms an air inlet, and each air outlet end forms an air outlet; an inner circulation fan is fixed relative to the heat exchange core and is used to drive air from the return air port to the supply port Air outlet; an external circulation fan, which is fixed relative to the heat exchange core and is used to drive the wind to flow from the air inlet to the air outlet; the internal circulation fan or the external circulation fan is accommodated in the first recessed portion, and when the internal circulation fan is accommodated in the first recessed portion, one of the return air outlet and the supply air outlet is located on the first protrusion, and the other is located on the first recessed portion; when the external circulation fan is accommodated 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; a shell, which is suitable for being embedded in the first side wall and used to accommodate the heat exchange core, and its part located inside the cabinet is respectively provided with first and second air outlets corresponding to the supply air outlet and the return air outlet, and its part located outside the cabinet is provided with a third air outlet connected to the air inlet and a fourth air outlet connected to 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 accommodated 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 installation wall perpendicular to the X-axis direction for installing the internal circulation fan; the external circulation air duct includes a first external heat-conducting air 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 air ducts corresponding to the first protrusion, which are arranged at intervals along the X-axis direction and extend along the Z-axis direction, and a second sub-external air duct corresponding to the first recessed portion, and the second sub-external air duct is connected to each first sub-external air duct; the first guide wall and the first installation wall form the air duct wall of the second sub-external air duct.

[0007] Based on Technical Solution 2, there is also provided Technical Solution 3. In Technical Solution 3 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 and the air outlet are respectively formed at the bottom and the top of the heat exchange core along the Z-axis direction; the external circulation air duct also includes a second external heat-conducting air duct located on the second side of the first external heat-conducting air duct along the X-axis direction, and the second external heat-conducting air duct includes a plurality of third sub-external air ducts parallel to each other and extending along the Z-axis direction, and the two ends of the third sub-external air duct are respectively connected to the air inlet and the air outlet; the ends of the first sub-external air duct and the second sub-external air duct away from each other are respectively connected to the air outlet and the air inlet, or are respectively connected to the air inlet and the air outlet.

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

[0010] Based on technical solution five, technical solution six is ​​also provided. In technical solution six and its related embodiments, the heat exchange core is provided with a detachable dust collecting plate at the bottom of the air collecting cavity 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 recessed portion is located below the first protruding portion; the ends of the first sub-external air duct and the second sub-external air duct that are away from each other are respectively connected to the air outlet and the air inlet; a first interval and a second interval are respectively formed between the bottom and top ends of the shell and the heat exchange core along the Z-axis direction; the external circulation fan is arranged 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 arranged at the bottom and side of the first interval, and the fourth air outlet is arranged on the second side of the second interval.

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

[0013] Based on Technical Solution Eight, Technical Solution Nine is also provided. In Technical Solution Nine and its related embodiments, the first recessed portion is located at the bottom end of the heat exchange core along the Z-axis direction, and the second recessed portion 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 recessed portion.

[0014] Based on technical solution nine, there is also a technical solution ten. In technical solution ten and its related embodiments, the wall between the second protrusion and the second recessed portion forms a second guide wall, and the second recessed portion is provided with a second installation wall perpendicular to the X-axis direction for installing the external circulation fan; the first external heat-conducting air duct also includes a plurality of fourth sub-external air ducts arranged at intervals along the Z-axis direction and extending along the X-axis direction, and each fourth sub-external air duct is connected to the air outlet end at one end and connected to a first sub-external air duct at the other end; the external circulation air duct also includes a third external heat-conducting air duct located on the second side of the heat exchange core along the X-axis direction, and the third external heat-conducting air duct includes a plurality of fifth sub-external air ducts corresponding to the second protrusion, which are arranged at intervals along the X-axis direction and extend along the Z-axis direction, and a sixth sub-external air duct corresponding to the second recessed portion, the fifth sub-external air duct is connected to the air inlet end, and the sixth sub-external air duct is connected to each fifth sub-external air duct and the air outlet end; the second guide wall and the second installation wall form the duct wall of the fifth sub-external air duct.

[0015] Based on technical solution ten, technical solution eleven is also provided. 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 a plurality of first sub-heat conducting air ducts, a plurality of second sub-heat conducting air ducts and a plurality of third sub-heat conducting air ducts. The first sub-heat conducting air ducts are arranged at intervals along the X-axis direction and extend along the Z-axis direction, the second sub-heat conducting air ducts are arranged along the Z-axis direction and extend along the X-axis direction and are connected to the air supply end, and the third sub-heat conducting air ducts are arranged along the Z-axis direction and extend along the X-axis direction and are connected to the return air end; the top end of the first sub-heat conducting air duct is connected to a third sub-heat conducting air duct or forms a gap, and the bottom end of the first sub-heat conducting air duct is connected to a second sub-heat conducting air duct or forms a gap.

[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 shell and the bottom end of 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 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.

[0019] 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:

[0020] The applicant has learned through continuous observation, experimentation and research that the reason for the technical problem of "poor heat exchange efficiency of the air heat exchanger" in the prior art solution is that in order to prevent the internal circulation fan from protruding from the cabinet, the structural setting of the air heat exchanger is such that the internal circulation air duct and the external circulation air duct can only exchange heat through the partition, resulting in poor heat exchange efficiency.

[0021] Technical solution 1 and its preferred embodiment, the inner circulation air duct and the outer circulation air duct are arranged alternately along the Y-axis direction. Compared with the heat exchange through the partition in the prior art, the heat exchange area is large and the heat exchange efficiency is high. On this basis, 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 direction. The overall path of the inner circulation air duct is also longer than the straight-through inner circulation air duct in the prior art, with greater wind resistance, and the inner circulation airflow stays in the inner circulation air duct for a longer time, which is more convenient. The heat exchange efficiency is further improved, but it should be understood that although the wind resistance of the internal circulation air duct is increased, the wind speed of the airflow in the internal circulation air duct is still relatively fast; the internal circulation fan or the external circulation fan is placed in the first recessed portion, and the shell body contains the heat exchange core. When the internal circulation fan is placed in the first recessed portion, the internal circulation fan does not protrude in the cabinet, and the internal circulation fan is embedded in the heat exchange core, making full use of the structure of the heat exchange core. On the basis that the return air end and the supply air end of the internal circulation air duct are both located on the first side of the heat exchange core along the X-axis direction, The invention not only realizes the hidden installation of the internal circulation fan, but also makes full use of the space above or below the internal circulation fan along the Z-axis direction to set the air duct, thereby enhancing heat exchange and having a clever structure. Compared with the solution in which the return air end and the supply air end of the internal circulation duct are both located on the first side of the heat exchange core along the X-axis direction, the internal circulation fan protrudes from the heat exchange core, thereby reducing the occupied space of the air heat exchanger in the X-axis direction and increasing the heat exchange area of ​​the internal circulation duct and the external circulation duct; similarly, when the external circulation fan is accommodated in the first recessed portion, that is, the external circulation fan is embedded in the heat exchange core, the structure of the heat exchange core is fully utilized, thereby realizing the hidden installation of the external circulation fan, and making full use of the space above and below the external circulation fan along the Z-axis direction to set the air duct, thereby enhancing heat exchange and having a clever structure. Compared with the solution in which the external circulation fan is located at the top or bottom of the heat exchange core along the Z-axis direction, the occupied space of the air heat exchanger in the Z-axis direction is reduced and the heat exchange area of ​​the internal circulation duct and the external circulation duct is increased.

[0022] In technical solution two and its preferred embodiment, the setting of the first outer heat-conducting air duct structure cleverly utilizes the structure of the first protrusion and the first recessed portion to increase the heat exchange area, wherein the first outer heat-conducting air duct includes a plurality of first sub-external air ducts arranged at intervals along the X-axis direction and extending along the Z-axis direction. Compared with the technical solution in which the first outer heat-conducting air duct only includes one first sub-external air duct, the heat exchange area is larger, thereby further increasing the heat exchange efficiency of the inner circulation air duct and the outer circulation air duct.

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

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

[0025] In technical solution five and its preferred embodiment, the arrangement of the first air duct, the air collecting chamber and the second air duct makes the overall path of the inner air duct U-shaped, the path of the inner circulating airflow is long, and compared with the solution where no air collecting chamber is arranged and the inner air duct includes multiple U-shaped pipes, the wind resistance is smaller, so the inner circulating airflow can fully exchange heat with the outer circulating air duct, thereby improving the heat exchange efficiency of the heat exchange core; wherein, the first air duct includes a plurality of first sub-air ducts arranged along the Z-axis direction and extending along the X-axis direction, and the second air duct includes a plurality of second sub-air ducts arranged along the Z-axis direction and extending along the X-axis direction, compared with only one first sub-air duct in the first air duct For the scheme that only one second sub-air duct is set in the first air duct and the second air duct, the heat exchange area of ​​the first air duct is larger, and the heat exchange area of ​​the second air duct is larger, thereby further increasing the heat exchange efficiency of the inner circulation air duct and the outer circulation air duct; each first sub-air duct and each second sub-air duct extend in the X-axis direction, and also make it difficult for dust in the inner circulation air duct to accumulate in the first sub-air duct and the second sub-air duct, but more easily gather in the air collecting cavity, thereby further improving the heat exchange efficiency of the inner circulation air duct and the outer circulation air duct. In addition, the above arrangement also makes the first sub-air duct and the second sub-air duct form a straight air duct, which is more convenient for production and processing, and has less wind resistance. Therefore, the structural arrangement of the heat exchange core in the present technical solution can well improve the heat exchange efficiency of the heat exchange core and even the air heat exchanger including the heat exchange core.

[0026] Since the airflow entering each second sub-air duct through the return air end is located at different heights along the Z-axis direction, the airflow temperature of each second sub-air duct is not consistent. If the airflow of the second sub-air duct flows directly to the first sub-air duct, that is, no air collecting cavity is set, and the second sub-air duct is connected to the first sub-air duct through a separate sub-air duct, then the temperature of the internal circulation airflow at the air supply end corresponding to each first sub-air duct is also inconsistent, and the temperature uniformity is poor. When the heat exchanger is used in an electrical cabinet, it will undoubtedly affect the heat dissipation of the electrical equipment in the electrical cabinet, and the setting of the air collecting cavity The airflows of each second sub-air duct can be fully mixed therein before flowing into the first sub-air duct, thus avoiding large temperature differences at each air supply end and greatly improving the temperature uniformity of the internal circulation airflow; that is to say, the air collecting chamber in the present technical solution can cooperate with the first air duct and the second air duct to make the inner air duct as a whole U-shaped, and compared with the solution in which the inner air duct includes multiple U-shaped pipes, the wind resistance is smaller, thereby increasing the heat exchange efficiency of the heat exchanger, and the internal circulation airflows of each second sub-air duct can be fully mixed to improve the temperature uniformity of the air supply end of the inner circulation air duct.

[0027] In technical solution six and its preferred embodiment, a removable dust collecting plate is provided at the bottom of the air collecting cavity along the Z-axis direction of the heat exchange core. Dust falls to the bottom of the air collecting cavity under the action of gravity. In actual application, when the dust in the inner circulation air duct gathers in the air collecting cavity, the air collecting cavity can be regularly dusted as needed, thereby avoiding dust clogging 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 interval and the second interval improves the protectiveness of the external circulation air duct and is conducive to the placement of the external circulation fan, wherein the setting of the first interval also ensures that the air inlet end of each external circulation air duct can take in air; the third air outlet is arranged at the bottom and side of the first interval, and the fourth air outlet is arranged at the second side of the second interval, which is conducive to forming a structure in which the part of the shell outside the cabinet forms a bottom air inlet and side air outlet, thereby improving the protectiveness of the external circulation air duct, making the external circulation air duct less prone to dust accumulation, and making the air outlet of the fourth air outlet discharged upward, and not easy to enter the third air outlet and cause a heat island effect; wherein the first recessed portion is located below the first protruding portion, so that the air supply port of the internal circulation air duct and the air outlet of the external circulation air duct are far away from each other along the Z-axis direction, which is more conducive to achieving sufficient heat exchange between the internal circulation air duct and the external circulation air duct.

[0029] In Technical Solution Eight and its preferred embodiments, the provision of the second protrusion and the second recess enables both the internal circulation fan and the external circulation fan to be embedded in the heat exchange core, thereby enhancing heat exchange and having an ingenious structure. It 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 air duct and the external circulation air duct.

[0030] In technical solution nine and its preferred embodiments, the first recessed portion is located at the bottom end of the heat exchange core along the Z-axis direction, and the second recessed portion 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 away from each other along the Z-axis direction, which is more conducive to achieving sufficient heat exchange between the internal circulation air duct and the external circulation air duct; the air inlet is formed on the second protrusion, and the air outlet is formed on the second recessed portion, so that the air outlet of the external circulation air 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 embodiments, the first external heat-conducting air duct also includes a plurality of fourth sub-external air ducts arranged at intervals along the Z-axis direction and extending along the X-axis direction, one end of each fourth sub-external air duct is connected to the air outlet end, and the other end is connected to a first sub-external air duct, so that the first external heat-conducting air duct is L-shaped as a whole, the external circulation air flow path is long, the heat exchange area is large, and the heat exchange efficiency of the internal circulation air duct and the external circulation air duct is higher; the setting of the third external heat-conducting air duct structure cleverly utilizes the structure of the second protrusion and the second recessed portion to increase the heat exchange area, wherein the third external heat-conducting air duct includes a plurality of fifth sub-external air ducts arranged at intervals along the X-axis direction and extending along the Z-axis direction, compared with the technical solution in which the third external heat-conducting air duct only includes one fifth sub-external air duct, the heat exchange area is larger, and the heat exchange efficiency of the internal circulation air duct and the external circulation air duct is further increased.

[0032] In technical solution eleven and its preferred embodiments, the first guide wall and the second guide wall are both inclined outward from top to bottom. On the one hand, the first recessed portion and the second recessed portion have larger space for installing the heat dissipation fan, which is more conducive to production and processing. On the other hand, it is beneficial to the guidance of the external circulation airflow and the internal circulation airflow.

[0033] In the technical solution 12 and its preferred embodiment, the setting of the inner circulation air duct increases the heat exchange area, thereby improving the heat exchange efficiency. The top 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 of the first sub-heat-conducting air duct is connected to or forms a gap with a second sub-heat-conducting air duct, wherein when the two ends of the first sub-heat-conducting air duct are connected to the second sub-heat-conducting air duct and the third sub-heat-conducting air duct, the inner circulation air duct forms a plurality of U-shaped pipes with small wind resistance. When they are not connected, there is no need to consider splicing, which is more conducive to production and processing.

[0034] In technical solution thirteen 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 air can enter the air inlet end of each external circulation air duct.

[0035] Technical solution fourteen has the technical advantages of any one of technical solutions one to thirteen. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 This is a schematic diagram of an electrical cabinet according to Embodiment 1 of the present application;

[0038] Figure 2 It is a partial schematic diagram of the heat exchange core of Example 1 of the present application;

[0039] Figure 3 for Figure 1 Left view of;

[0040] Figure 4 for Figure 3 Section view in AA direction;

[0041] Figure 5 for Figure 3 Cross-sectional view in the BB direction;

[0042] Figure 6 Schematic diagram of the heat exchange core of Example 2 of the present application Figure 1 ;

[0043] Figure 7 Schematic diagram of the heat exchange core of Example 2 of the present application Figure 2 ;

[0044] Figure 8 This is a cross-sectional view of Example 2 of the present application Figure 1 ;

[0045] Fig. 9 This is a cross-sectional view of Example 2 of the present application Figure 2 .

[0046] Description of main reference numerals:

[0047] Cabinet 100; first side wall 101; air heat exchanger 200; heat exchange core 10; first protrusion 11; first guide wall 111; first recessed portion 12; first mounting wall 121; air collecting chamber 13; dust collecting plate 131; inner circulation air duct 14; first air duct 141; first sub-air duct 1411; air supply end 1412; second air duct 142; second sub-air duct 1421; return air end 1422; air supply port 01; return air port 02; first sub-heat conducting air duct 143; second sub-heat conducting air duct 144; third sub-heat conducting air duct 145; outer circulation air duct 15; first outer heat conducting air duct 151; first sub External air duct 1511; second sub-external air duct 1512; fourth sub-external air duct 1513; second external heat-conducting air duct 152; third sub-external air duct 1521; air inlet end 153; air outlet end 154; air inlet 03; air outlet 04; third external heat-conducting air duct 155; fifth sub-external air duct 1551; sixth sub-external air duct 1552; second protrusion 16; second guide wall 161; second recessed portion 17; second mounting wall 171; shell 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 DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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".

[0053] 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.

[0054] Example 1

[0055] 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.

[0056] See also Figure 2-5 The 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 in the shape of a rectangular parallelepiped as a whole. The heat exchange core 10 is provided with a first protrusion 11 and a first recessed portion 12 recessed relative to the first protrusion 11 along the Z-axis direction on the first side along the X-axis direction. The first recessed portion 12 is located below the first protrusion 11. The wall between the first protrusion 11 and the first recessed portion 12 forms a first guide wall 111, and the first guide wall 111 is inclined relative to the X-axis direction and the Z-axis direction. Figure 5The first guide wall 111 is inclined outward from top to bottom. The first recessed portion 12 is provided with a first installation wall 121 perpendicular to the X-axis direction for installing 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 alternately arranged along the Y-axis direction.

[0058] See also Figure 4 The inner circulation air 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 port 02, each supply air end 1412 forms an air supply port 01, the return air port 02 and the air supply port 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 port 02 and the air supply port 01 are both located on the first side of the heat exchange core 10 along the X-axis direction, one of the return air port 02 and the air supply port 01 is located on the first protruding portion 11, and the other is located on the first recessed portion 12. In this embodiment, the air supply port 01 is located on the first recessed portion 12, and the return air port 02 is located on the first protruding portion 11; however, it should be understood that in other embodiments, the return air port 02 is located on the first recessed portion 12, and the air supply port 01 is located on the first recessed portion 12. On a protruding portion 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 collecting chamber 13, and the air collecting chamber 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 duct 141 and a second air duct 142, the first air duct 141 includes a plurality of first sub-air ducts 1411 arranged along the Z-axis direction and extending along the X-axis direction, one end of the first sub-air duct 1411 is connected to the air collecting chamber 13, and the other end is connected to the air supply end 1412; the second air duct 142 includes a plurality of second sub-air ducts 1421 arranged along the Z-axis direction and extending along the X-axis direction, one end of the second sub-air duct 1421 is connected to the air collecting chamber 13, and the other end is connected to the return air end 1422. The heat exchange core 10 is provided with a detachable dust collecting plate 131 at the bottom of the air collecting chamber 13 along the Z-axis direction.

[0059] See also Figure 5The outer circulation air duct 15 is provided with an air inlet end 153 and an air outlet end 154, which are respectively formed at the bottom and top of the heat exchange core 10 along the Z-axis direction. Each air inlet end 153 forms an air inlet 03, and each air outlet end 154 forms an air outlet 04. The outer circulation air duct 15 includes a first outer heat-conducting air duct 151 and a second outer heat-conducting air duct 152. The first outer heat-conducting air 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 corresponding to the first protruding portion 11, which are arranged at intervals along the X-axis direction and extend along the Z-axis direction, and a second sub-external air duct 1512 corresponding to the first recessed portion 12. The second sub-external air duct 1512 The first sub-external air ducts 1511 are connected, and the ends of the first sub-external air duct 1511 and the second sub-external air duct 1512 that are away from each other are respectively connected to the air outlet end 154 and the air inlet end 153, but it should be understood that when the first protrusion 11 is located below the first recessed portion 12, the ends of the first sub-external air duct 1511 and the second sub-external air duct 1512 that are away from each other are respectively connected to the air inlet end 153 and the air outlet end 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 conducting air duct 152 is located at the second side of the first external heat conducting air duct 151 along the X-axis direction. The second external heat conducting air duct 152 includes a plurality of third sub-external air ducts 1521 which are parallel to each other and extend along the Z-axis direction. The two ends of the third sub-external air duct 1521 are respectively connected to the air inlet end 153 and the air outlet end 154.

[0061] The shell 20 is suitable for being embedded in the first side wall 101 and used to accommodate the heat exchange core 10 and the external circulation fan 40. The part located inside the cabinet 100 is respectively provided with a first air port 21 and a second air port 22 corresponding to the air supply port 01 and the air return port 02. The part 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. In this embodiment, the length of the shell 20 along the X-axis direction is greater than that of the heat exchange core 10 so as to match the second side of the heat exchange core 10 along the X-axis direction. Together they form an air collecting chamber 13, 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, the height of the shell 20 along the Z-axis direction is higher than the heat exchange core 10, the top and bottom ends of the shell 20 and the heat exchange core 10 along the Z-axis direction respectively form a first interval 25 and a 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 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 to flow from the return air port 02 to the supply air port 01. In this embodiment, the internal circulation fan 30 is accommodated in the first recessed portion 12 and installed on the first installation 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 wind 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 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 inner circulation air duct 14 and the outer circulation air duct 15 are arranged alternately along the Y-axis direction. Compared with the prior art in which the inner circulation air duct 14 and the outer circulation air duct 15 exchange heat through the 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 direction. The overall path of the inner circulation air duct 14 is also longer and has greater wind resistance than the straight-through inner circulation air duct 14 in the prior art. The inner circulation airflow stays in the inner circulation air duct 14 for a longer time, which further improves the heat exchange efficiency. However, it should be understood that although the wind resistance of the inner circulation air duct 14 increases, the wind speed of the airflow in the inner circulation air duct 14 is still relatively fast; the inner circulation fan 30 is placed in the first recessed portion 12, and the shell 20 contains the heat exchange core 10, which can achieve the inner The circulation fan 30 does not protrude in the cabinet 100. The internal circulation fan 30 is embedded in the heat exchange core 10, and the structure of the heat exchange core 10 is fully utilized. On the basis that the air supply end and the return air end of the internal circulation air duct 14 are both located on the first side of the heat exchange core 10 along the X-axis direction, the hidden installation of the internal circulation fan 30 is realized, and the space above or below the internal circulation fan 30 along the Z-axis direction is fully utilized to set the air duct, thereby enhancing heat exchange and having an ingenious structure. Compared with the solution in which the air supply end and the return air end of the internal circulation air duct 14 are both located on the first side of the heat exchange core 10 along the X-axis direction, and the internal circulation fan 30 protrudes from the heat exchange core 10, the space occupied by the air heat exchanger 200 in the X-axis direction is reduced, and the heat exchange area of ​​the internal circulation air duct 14 and the external circulation air duct 15 is increased.

[0065] In this embodiment, the setting of the first outer heat-conducting air duct 151 structure cleverly utilizes the structure of the first protrusion 11 and the first recessed portion 12 to increase the heat exchange area, wherein the first outer heat-conducting air duct 151 includes a plurality of first sub-outer air ducts 1511 arranged at intervals along the X-axis direction and extending along the Z-axis direction. Compared with the technical solution in which the first outer heat-conducting air duct 151 only includes one first sub-outer air duct 1511, the heat exchange area is larger, thereby further increasing the heat exchange efficiency of the inner circulation air duct 14 and the outer circulation air duct 15.

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

[0067] In this embodiment, the air inlet end 153 and the air outlet end 154 are respectively formed at the bottom and the top of the heat exchange core 10 along the Z-axis direction, so that the outer circulation air duct 15 takes in air at the bottom and discharges air at the top, which is more conducive to preventing the hot air from the air outlet end 154 of the outer circulation air duct 15 from re-entering the air inlet end 153; the second outer heat-conducting air duct 152 includes a plurality of third sub-external air ducts 1521 parallel to each other and extending along the Z-axis direction, and the two ends of the third sub-external air duct 1521 are respectively connected to the air inlet end 153 and the air outlet end 154. Compared with the solution in which only one third sub-external air duct 1521 is formed in the second outer heat-conducting air duct 152, the heat exchange area is larger, and the heat exchange efficiency of the inner circulation air duct 14 and the outer circulation air duct 15 is further increased.

[0068] In the present embodiment, the first air duct 141, the air collecting chamber 13 and the second air duct 142 are provided so that the overall path of the inner air duct is U-shaped, the path of the inner circulating airflow is long, and compared with the solution where the air collecting chamber 13 is not provided and the inner air duct includes a plurality of U-shaped pipes, the wind resistance is smaller, so the inner circulating airflow can fully exchange heat with the outer circulating air duct 15, thereby improving the heat exchange efficiency of the heat exchange core 10; wherein, the first air duct 141 includes a plurality of first sub-air ducts 1411 arranged along the Z-axis direction and extending along the X-axis direction, and the second air duct 142 includes a plurality of second sub-air ducts 1421 arranged along the Z-axis direction and extending along the X-axis direction. Compared with only one first sub-air duct 1411 being provided in the first air duct 141, the second air duct For the solution of only setting one second sub-air duct 1421, the heat exchange area of ​​the first air duct 141 is larger, and the heat exchange area of ​​the second air duct 142 is larger, thereby further increasing the heat exchange efficiency of the inner circulation air duct 14 and the outer circulation air duct 15; each first sub-air duct 1411 and each second sub-air duct 1421 extend in the X-axis direction, and also make it difficult for dust in the inner circulation air duct to accumulate in the first sub-air duct 1411 and the second sub-air duct 1421, but more easily gather in the air collecting chamber 13, thereby further improving the heat exchange efficiency of the inner circulation air duct 14 and the outer circulation air duct 15. In addition, the above-mentioned setting also makes the first sub-air duct 1411 and the second sub-air duct 1421 form a straight air duct, which is more convenient for production and processing, and has less wind resistance. Therefore, the structural setting of the heat exchange core 10 in the present technical solution can well improve the heat exchange efficiency of the heat exchange core 10 and even the air heat exchanger including the heat exchange core 10.

[0069] Since the wind flows entering each second sub-air duct 1421 through the return air end 1422 are located at different heights along the Z-axis direction, the wind flow temperatures of each second sub-air duct 1421 are not consistent. If the wind flow of the second sub-air duct 1421 flows directly to the first sub-air duct 1411, that is, no air collecting chamber 13 is provided, and the second sub-air duct 1421 is connected to the first sub-air duct 1411 through a separate sub-air duct, then the temperature of the internal circulation wind flow at the air supply end 1412 corresponding to each first sub-air duct 1411 is also inconsistent, and the temperature uniformity is poor. When the heat exchanger is used in an electrical cabinet, it will undoubtedly affect the heat dissipation of the electrical equipment in the electrical cabinet, and the air collecting chamber 13 is not provided. The setting of the wind cavity 13 allows the airflows of each second sub-air duct 1421 to be fully mixed therein before flowing into the first sub-air duct 1411, avoiding large temperature differences at each air supply end 1412 and greatly improving the temperature uniformity of the internal circulation airflow; that is, the air collecting cavity 13 in the present technical solution can cooperate with the first air duct 141 and the second air duct 142 to make the internal air duct as a whole U-shaped, and compared with the solution in which the internal air duct includes multiple U-shaped pipes, the wind resistance is smaller, thereby increasing the heat exchange efficiency of the heat exchanger, and the internal circulation airflows of each second sub-air end can be fully mixed to improve the temperature uniformity of the air supply end 1412 of the internal circulation air duct 14.

[0070] In this embodiment, the heat exchange core 10 is provided with a removable dust collecting plate 131 at the bottom of the air collecting chamber 13 along the Z-axis direction. Dust falls to the bottom of the air collecting chamber 13 under the action of gravity. In actual application, when the dust in the internal circulation air duct 14 is collected in the air collecting chamber 13, the air collecting chamber 13 can be regularly dusted as needed, thereby avoiding dust clogging 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 protectiveness of the external circulation air duct 15 and is conducive to the placement of the external circulation fan 40, wherein the arrangement of the first interval 25 also ensures that the air inlet end 153 of each external circulation air duct 15 can take in air; the third air outlet 23 is arranged at the bottom and side of the first interval 25, and the fourth air outlet 24 is arranged at the second side of the second interval 26, which is conducive to forming a structure in which the part of the shell 20 located outside the cabinet 100 forms a bottom air inlet and side air outlet, thereby improving the protectiveness of the external circulation air duct 15, making it difficult for the external circulation air duct 15 to accumulate dust, and making the air outlet of the fourth air outlet 24 discharged upward, and not easy to enter the third air outlet 23 to cause a heat island effect; wherein the first recessed portion 12 is located below the first protruding portion 11, so that the air supply port 01 of the internal circulation air duct 14 and the air outlet 04 of the external circulation air duct 15 are far away from each other along the Z-axis direction, which is more conducive to achieving sufficient heat exchange between the internal circulation air duct 14 and the external circulation air duct 15.

[0072] Example 2

[0073] The structure of this embodiment is basically the same as that of embodiment 1, except that Figure 6-9, the structure of the air heat exchanger 200 is different as follows:

[0074] 1. The air heat exchanger 200 in this embodiment is not provided with an air collecting cavity 13, and the heat exchange core 10 is also provided with a first protruding portion 11 and a first recessed portion 12. The inner circulation air duct 14 forms a return air end 1422 on the first protruding portion 11 and forms an air supply end 1412 on the first recessed portion 12. Each return air end 1422 forms a return air port 02, and each air supply end 1412 forms an air supply port 01. In addition, see Figure 6-7 The heat exchange core 10 is provided with a second protrusion 16 and a second recessed portion 17 that is recessed relative to the second protrusion 16 along the Z-axis direction on the second side of the X-axis direction; the air inlet 03 is formed on one of the second protrusion 16 and the second recessed portion 17, and the air outlet 04 is formed on the other of the second protrusion 16 and the second recessed portion 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 recessed portion 17. The wall between the second protrusion 16 and the second recessed portion 17 forms a second guide wall 161, and the second recessed portion 17 is provided with a second installation wall 171 perpendicular to the X-axis direction for installing the external circulation fan 40; wherein the first recessed portion 12 is located at the bottom end of the heat exchange core 10 along the Z-axis direction, and the second recessed portion 17 is located at the top end of the heat exchange core 10 along the Z-axis direction. The first guide wall 111 and the second guide wall 161 are both inclined outward from top to bottom.

[0075] 2. The internal circulation air duct 14 is different from that in the first embodiment.

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

[0077] 3. The external circulation air duct 15 is different from that in the first embodiment.

[0078] In this embodiment, see Fig. 9In addition to the first sub-external air duct 1511 and the second sub-external air duct 1512, the first external heat-conducting air duct 151 also includes a plurality of fourth sub-external air ducts 1513 arranged at intervals along the Z-axis direction and extending along the X-axis direction, and each fourth sub-external air duct 1513 is connected to the air outlet end 154 at one end and connected to a first sub-external air duct 1511 at the other end; 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 direction, and the third external heat-conducting air duct 155 is located on the second side of the heat exchange core 10 along the X-axis direction. The air duct 155 includes a plurality of fifth sub-external air ducts 1551 corresponding to the second protrusion 16, which are arranged at intervals along the X-axis direction and extend along the Z-axis direction, and a sixth sub-external air duct 1552 corresponding to the second recessed portion 17. The fifth sub-external air duct 1551 is connected to the air inlet end 153, and the sixth sub-external air duct 1552 is connected to each fifth sub-external air duct 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] Fourth, the structure of the housing 20 is different.

[0080] In this embodiment, the second gap is no longer formed between the shell 20 and the top end of the heat exchange core 10 , and 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 .

[0081] 4. The external circulation fan 40 is placed in the second recessed portion 17 and is mainly installed on the second installation wall 171 .

[0082] In the present embodiment, the external circulation fan 40 is placed in the second recessed portion 17, that is, the external circulation fan 40 is embedded in the heat exchange core 10, which makes full use of the structure of the heat exchange core 10 to realize 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 direction to set the air duct, thereby enhancing heat exchange and having an ingenious structure. Compared with the solution in which the external circulation fan 40 is located at the top or bottom of the heat exchange core 10 along the Z-axis direction, the space occupied by the air heat exchanger 200 in the Z-axis direction is reduced, and the heat exchange area of ​​the internal circulation air duct 14 and the external circulation air duct 15 is increased. Therefore, in this embodiment, the setting of the second protrusion 16 and the second recessed portion 17 enables the internal circulation fan 30 and the external circulation fan 40 to be embedded in the heat exchange core 10, thereby enhancing heat exchange, having a clever structure, and reducing the space occupied by the air heat exchanger 200 in the X-axis direction and the Z-axis direction, and increasing the heat exchange area of ​​the internal circulation air duct 14 and the external circulation air duct 15.

[0083] In this embodiment, the first recessed portion 12 is located at the bottom end of the heat exchange core 10 along the Z-axis direction, and the second recessed portion 17 is located at the top end of the heat exchange core 10 along the Z-axis direction, so that the inner circulation fan 30 and the outer circulation fan 40 are far away from each other along the Z-axis direction, which is more conducive to achieving sufficient heat exchange between the inner circulation air duct 14 and the outer circulation air duct 15. The air inlet 03 is formed on the second protruding portion 16, and the air outlet 04 is formed on the second recessed portion 17, so that the air outlet 04 of the outer circulation air 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 outer heat-conducting air duct 151 also includes a plurality of fourth sub-external air ducts 1513 arranged at intervals along the Z-axis direction and extending along the X-axis direction. One end of each fourth sub-external air duct 1513 is connected to the air outlet end 154, and the other end is connected to a first sub-external air duct 1511. Therefore, the first outer heat-conducting air duct 151 is L-shaped as a whole, the outer circulation air flow path is long, the heat exchange area is large, and the heat exchange efficiency of the inner circulation air duct 14 and the outer circulation air duct 15 is higher; the setting of the structure of the third outer heat-conducting air duct 155 cleverly utilizes the structure of the second protrusion 16 and the second recessed portion 17 to increase the heat exchange area, wherein the third outer heat-conducting air duct 155 includes a plurality of fifth sub-external air ducts 1551 arranged at intervals along the X-axis direction and extending along the Z-axis direction. Compared with the technical solution in which the third outer heat-conducting air duct 155 includes only one fifth sub-external air duct 1551, the heat exchange area is larger, and the heat exchange efficiency of the inner circulation air duct 14 and the outer circulation air duct 15 is further increased.

[0085] In this embodiment, the first guide wall 111 and the second guide wall 161 are both inclined outward from top to bottom. On the one hand, the first recessed portion 12 and the second recessed portion 17 have a larger space for installing the heat dissipation fan, which is more conducive to production and processing. On the other hand, it is beneficial to the guidance of the external circulation airflow and the internal circulation airflow.

[0086] In this embodiment, the setting of the inner circulation air duct 14 increases the heat exchange area, thereby improving the heat exchange efficiency. The top of the first sub-heat-conducting air duct 143 is connected to a third sub-heat-conducting air duct 145 or forms a gap, and the bottom of the first sub-heat-conducting air duct 143 is connected to a second sub-heat-conducting air duct 144 or forms a gap. When the two 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 inner circulation air duct 14 forms a plurality of U-shaped pipes with small wind resistance. When they are not connected, there is no need to consider splicing, 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 take in air.

[0088] It should be understood that when the first side of the heat exchange core 10 along the X-axis direction is the outer side of the heat exchange core 10, the external circulation fan 40 is accommodated in the first recessed portion 12, and the heat exchange core 10 is not provided with the second protruding portion 16 and the second recessed portion 17, the internal circulation fan 30 protrudes on the second side of the heat exchange core 10 along the X-axis direction, and one of the air inlet 03 and the air outlet 04 is located on the first protruding portion 11, and the other is located on the first recessed portion 12, so that the air inlet 03 is located at the bottom end of the heat exchange core 10, and the air outlet 04 is located on the first side of the heat exchange core 10 along the X-axis direction, and the external circulation fan 40 is located in the first recessed portion 12. The fan 40 is placed in the first recessed portion 12, that is, the external circulation fan 40 is embedded in the heat exchange core 10, which makes full use of the structure of the heat exchange core 10 to realize 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 direction to set the air duct, thereby enhancing heat exchange and having an ingenious structure. Compared with the solution in which the external circulation fan 40 is located at the top or bottom of the heat exchange core 10 along the Z-axis direction, the space occupied by the air heat exchanger 200 in the Z-axis direction is reduced, and the heat exchange area of ​​the internal circulation air duct 14 and the external circulation air duct 15 is increased.

[0089] 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. 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) is provided with a first protruding portion (11) and a first recessed portion (12) recessed relative to the first protruding portion (11) along a first side along an X-axis direction along a Z-axis direction, and is provided with a plurality of inner circulation air ducts (14) and outer circulation air ducts (15) alternately arranged along a Y-axis direction; the inner circulation air duct (14) is provided with a return air end (1422) and an air supply end (1412), and each return air end (142 2) forming a return air port (02), each air supply end (1412) forming an air supply port (01), the return air port (02) and the air supply port (01) being located on the same side of the heat exchange core (10) along the X-axis direction; the external circulation air duct (15) is provided with an air inlet end (153) and an air outlet end (154), each air inlet end (153) forming an air inlet (03), and each air outlet end (154) forming an air outlet (04); An internal circulation fan (30), which is fixed relative to the heat exchange core (10) and is used to drive air to flow from the return air port (02) to the supply air port (01); an external circulation fan (40), which 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); the internal circulation fan (30) or the external circulation fan (40) is accommodated in the first recessed portion (12); when the internal circulation fan (30) is accommodated in the first recessed portion (12), one of the return air port (02) and the air supply port (01) is located on the first protruding portion (11), and the other is located on the first recessed portion (12); when the external circulation fan (40) is accommodated in the first recessed portion (12), one of the air inlet (03) and the air outlet (04) is located on the first protruding portion (11), and the other is located on the first recessed portion (12); and A shell (20) is suitable for being embedded in the first side wall (101) and used to accommodate the heat exchange core (10), wherein the portion 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, and the portion 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).

2. An air heat exchanger (200) according to claim 1, characterized in that: The inner circulation fan (30) is accommodated in the first recessed portion (12); the wall between the first protruding portion (11) and the first recessed portion (12) forms a first flow guide wall (111), and the first recessed portion (12) is provided with a first installation wall (121) perpendicular to the X-axis direction for installing the inner circulation fan (30); the outer circulation air duct (15) comprises a first outer heat conduction air duct (151), and the first outer heat conduction air duct (151) is located at the heat exchange core (1 0) along the first side in the X-axis direction and comprising a plurality of first sub-external air ducts (1511) corresponding to the first protruding portion (11) and arranged at intervals in the X-axis direction and extending in the Z-axis direction, and a second sub-external air duct (1512) corresponding to the first recessed portion (12), wherein the second sub-external air duct (1512) is connected to 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) according to claim 2, characterized in that: The first flow guide wall (111) is inclined relative to the X-axis direction and the Z-axis direction.

4. An air heat exchanger (200) according to claim 3, characterized in that: The air inlet end (153) and the air outlet end (154) are respectively formed at the bottom end and the top end of the heat exchange core (10) along the Z-axis direction; The external circulation air duct (15) further comprises a second external heat-conducting air duct (152) located on the second side of the first external heat-conducting air duct (151) along the X-axis direction, the second external heat-conducting air duct (152) comprising a plurality of third sub-external air ducts (1521) extending in parallel with each other along the Z-axis direction, the two ends of the third sub-external air ducts (1521) respectively being connected to the air inlet end (153) and the air outlet end (154); the ends of the first sub-external air duct (1511) and the second sub-external air duct (1512) which are away 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) according to any one of claims 1 to 4, characterized in that: The shell (20) and the second side of the heat exchange core (10) along the X-axis direction also cooperate to form an air collecting chamber (13), and the air collecting chamber (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 duct (141) and a second air duct (142), the first air duct (141) includes a plurality of first sub-air ducts (1411) arranged along the Z-axis direction and extending along the X-axis direction, one end of the first sub-air duct (1411) is connected to the air collecting chamber (13), and the other end is connected to the air supply end (1412); the second air duct (142) includes a plurality of second sub-air ducts (1421) arranged along the Z-axis direction and extending along the X-axis direction, one end of the second sub-air duct (1421) is connected to the air collecting chamber (13), and the other end is connected to the return air end (1422).

6. An air heat exchanger (200) according to claim 5, characterized in that: The heat exchange core (10) is provided with a detachable dust collecting plate (131) at the bottom of the air collecting chamber (13) along the Z-axis direction.

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

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

9. An air heat exchanger (200) according to claim 8, characterized in that: The first recessed portion (12) is located at the bottom end of the heat exchange core (10) along the Z-axis direction, and the second recessed portion (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 protruding portion (16), and the air outlet (04) is formed on the second recessed portion (17).

10. An air heat exchanger (200) according to claim 9, characterized in that: The wall between the second protruding portion (16) and the second recessed portion (17) forms a second flow guide wall (161), and the second recessed portion (17) is provided with a second installation wall (171) perpendicular to the X-axis direction for installing the external circulation fan (40); The first external heat-conducting air duct (151) further comprises a plurality of fourth sub-external air ducts (1513) arranged at intervals along the Z-axis direction and extending along the X-axis direction, wherein one end of each fourth sub-external air duct (1513) is connected to the air outlet end (154), and the other end is connected to a first sub-external air duct (1511); The external circulation air duct (15) further comprises a third external heat-conducting air duct (155) located on the second side of the heat exchange core (10) along the X-axis direction, the third external heat-conducting air duct (155) comprising a plurality of fifth sub-external air ducts (1551) corresponding to the second protruding portion (16) and arranged at intervals along the X-axis direction and extending along the Z-axis direction, and a sixth sub-external air duct (1552) corresponding to the second recessed portion (17), the fifth sub-external air duct (1551) being connected to the air inlet end (153), and the sixth sub-external air duct (1552) being connected to each fifth sub-external air duct (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 fifth sub-external air duct (1551).

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

12. An air heat exchanger (200) according to claim 11, characterized in that: The internal circulation air duct (14) comprises a plurality of first sub-heat-conducting air ducts (143), a plurality of second sub-heat-conducting air ducts (144) and a plurality of third sub-heat-conducting air ducts (145); each first sub-heat-conducting air duct (143) is arranged at intervals along the X-axis direction and extends along the Z-axis direction; each second sub-heat-conducting air duct (144) is arranged along the Z-axis direction and extends along the X-axis direction and is connected to an air supply end (1412); each third sub-heat-conducting air duct (145) is arranged along the Z-axis direction and extends along the X-axis direction and is connected to an 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).

13. An air heat exchanger (200) according to any one of claims 9 to 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); and the fourth air outlet (24) corresponds to the external circulation fan (40).

14. An electrical cabinet, characterized in that: It comprises a cabinet (100) and an air heat exchanger (200) according to any one of claims 1 to 13; 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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