Air-air heat exchanger and energy storage converter

Abstract

The utility model discloses an air-to-air heat exchanger and an energy storage converter, a shell of the air-to-air heat exchanger defines an air inlet area, a heat exchange area and an air outlet area which are sequentially arranged in the vertical direction, an air port for internal circulation ventilation corresponds to the heat exchanger area, and an air port for external circulation ventilation corresponds to the air inlet area and the air outlet area. The heat exchange core body is correspondingly arranged in the heat exchange area, so that the outer circulation air channel in the heat exchange core body is arranged in a straight-through mode in the vertical direction, and the situation that dust in outer circulation low protection air flow is accumulated at the corner of the outer circulation air channel of the heat exchange core body after being used for a long time, and consequently the efficiency of the heat exchanger is reduced is avoided. The energy storage converter comprises the air-air heat exchanger. The heat exchange efficiency is high, and the dust accumulation risk of the heat exchanger is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of heat dissipation, in particular to an air-to-air heat exchanger and energy storage converter. BACKGROUND

[0002] A large number of electrical components are usually placed in the energy storage converter, which cannot work in a high-temperature environment for a long time, and the energy storage converter uses a closed structure to reduce the influence of external dust on the internal electrical components. The air-to-air heat exchanger can release the heat inside the energy storage converter to the external environment through heat exchange, so the energy storage converter usually uses an air-to-air heat exchanger to dissipate heat inside the energy storage converter, and the air-to-air heat exchanger is usually hung on the side door plate of the cabinet.

[0003] Specifically, the air-to-air heat exchanger includes a heat exchange core, which has an internal circulation air duct communicating with the inside of the cabinet and an external circulation air duct communicating with the outside. The internal circulation air duct and the external circulation air duct are arranged alternately, the internal circulation air duct is generally top-inlet side-outlet, and the external circulation air duct is bottom-inlet side-outlet. The air flow flows in opposite directions in the internal circulation air duct and the external circulation air duct to achieve heat exchange, but the heat exchange efficiency of this heat exchanger still cannot meet the heat exchange demand of the energy storage converter.

[0004] In addition, since the external circulation air duct is bottom-inlet side-outlet, the dust carried by the external air flow is easy to accumulate at the corners of the internal and external circulation air ducts in the core, causing the heat exchange efficiency of the heat exchange core to decrease after long-term use. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the above-mentioned defects or problems existing in the background art, providing an air-to-air heat exchanger and energy storage converter, which is not easy to accumulate dust in the core and has high heat exchange efficiency.

[0006] To achieve the above-mentioned purpose, the utility model and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0007] The technical solution one and related embodiments thereof provide an air-to-air heat exchanger, which is installed on a first side wall of an electrical cabinet perpendicular to a horizontal X-axis direction, and comprises a shell forming a containing cavity and having a first side and a second side opposite to each other and close to and away from the first side wall respectively; the first side is provided with a first air inlet and a second air inlet for air flow into and out of the electrical cabinet, and the second side is provided with a third air inlet and a fourth air inlet for air flow into and out of the electrical cabinet; the containing cavity defines, along a vertical Z-axis direction, an air inlet area, a heat exchange area and an air outlet area arranged in sequence; in the Z-axis direction, the air inlet area and the air outlet area correspond to the third air inlet and the fourth air inlet respectively, and the first air inlet and the second air inlet correspond to the heat exchange area; a heat exchange core is arranged in the heat exchange area and forms a plurality of inner circulation air ducts and outer circulation air ducts arranged alternately along a horizontal Y-axis direction; each inner circulation air duct is connected to the first air inlet and the second air inlet; each outer circulation air duct extends along the Z-axis direction and is connected to the air inlet area and the air outlet area to connect the third air inlet and the fourth air inlet; a first heat dissipation fan is fixed relative to the shell and used to drive air flow in the electrical cabinet from the second air inlet to the first air inlet; and a second heat dissipation fan is fixed relative to the shell and used to drive air flow out of the electrical cabinet from the third air inlet to the fourth air inlet.

[0008] Based on the technical solution one, the technical solution two is also provided, in which the shell is embedded in the first side wall; the first heat dissipation fan is arranged outside the shell and corresponds to the first air inlet or the second air inlet, and the second heat dissipation fan is arranged inside the shell and located in the air inlet area and the air outlet area.

[0009] Based on the technical solution two, the technical solution three is also provided, in which the first heat dissipation fan is fixed to the first air inlet of the shell, and the second heat dissipation fan is arranged in the air outlet area; the third air inlet is located at the bottom end and the outer side of the air inlet area, and the fourth air inlet is located at the outer side of the air outlet area and higher than the second heat dissipation fan.

[0010] Based on the technical solution three, the technical solution four is also provided, in which the inner circulation air ducts are provided with a plurality of pipes; the two ends of each pipe are opened on the first side of the heat exchange core along the X-axis direction and form air supply ends and air return ends respectively, and each air supply end and each air return end of each inner circulation air duct are arranged along the Z-axis direction; the outer circulation air ducts penetrate through the heat exchange core along the Z-axis direction and form air inlet ends and air outlet ends at their two ends respectively; each air supply end and each air return end of each inner circulation air duct form air supply ports and air return ports respectively, and each air inlet end and each air outlet end of each outer circulation air duct form air inlet ports and air outlet ports respectively; the air supply ports are connected to the first air inlet, the air return ports are connected to the second air inlet, the air inlet ports are connected to the third air inlet, and the air outlet ports are connected to the fourth air inlet.

[0011] Based on technical solution four, there is also technical solution five, in which the pipeline is U-shaped, and is provided with a first section in communication with the air supply end, a second section in communication with the return air end, and a third section in communication with the first section and the second section; the first section and the second section extend along the X-axis direction, and the third section extends along the Z-axis direction; each first section and each second section in each inner circulating air duct is arranged along the Z-axis direction, and each third section is arranged along the X-axis direction.

[0012] Based on technical solution five, there is also technical solution six, in which the first section is provided with a plurality of first sub-inner air ducts parallel to each other, the second section is provided with a plurality of second sub-inner air ducts parallel to each other, and the third section is provided with a plurality of third sub-inner air ducts parallel to each other.

[0013] Based on technical solution six, there is also technical solution seven, in which the number of the first sub-inner air ducts, the second sub-inner air ducts and the third sub-inner air ducts is equal and one-to-one corresponding, the first sub-inner air duct and the corresponding third sub-inner air duct are in communication, and the second sub-inner air duct and the corresponding third sub-inner air duct are in communication.

[0014] Based on technical solution six, there is also technical solution eight, in which gaps are formed between the first sub-inner air duct and the third sub-inner air duct, and gaps are formed between the second sub-inner air duct and the third sub-inner air duct.

[0015] Based on technical solution four, there is also technical solution nine, in which the outer circulating air duct is provided with a plurality of sub-outer air ducts parallel to each other and extending along the Z-axis direction.

[0016] Technical solution ten and its related embodiments provide an energy storage converter, which comprises a cabinet body and the air-to-air heat exchanger according to any one of technical solutions one to nine; the cabinet body is provided with a first side wall perpendicular to the X-axis direction, and the shell is embedded in the first side wall; the first air port and the second air port are located in the cabinet body, and the third air port and the fourth air port are located outside the cabinet body.

[0017] From the above description of the present application and its preferred embodiments, compared with the prior art, the technical solutions and preferred embodiments of the present application have the following beneficial effects due to the use of the following technical means:

[0018] Through continuous observation, experiment and research, the applicant knows that in the prior art, the reason for causing the technical problem of "poor heat exchange efficiency of the heat exchanger" is that the top corner of the outer circulating air duct is prone to dust accumulation after long-time heat exchange, and the heat exchange time of the inner circulating air duct is short, and the heat exchange is insufficient.

[0019] In the technical solution one and the preferred embodiments thereof, the air-to-air heat exchanger is vertically arranged on the first side wall of the electrical cabinet, and the shell defines, in the vertical direction, an air inlet area, a heat exchange area and an air outlet area arranged in sequence, the first air port and the second air port for internal circulation ventilation correspond to the heat exchanger area, and the third air port and the fourth air port for external circulation ventilation correspond to the air inlet area and the air outlet area. Then, the heat exchange core is correspondingly arranged in the heat exchange area, so that the external circulation air ducts in the heat exchange core are arranged in straight-through in the vertical direction, the air resistance is small, and dust in the low-protection air flow of the external circulation is prevented from accumulating at the corner of the external circulation air duct of the heat exchange core after long-term use, thereby reducing the heat exchange efficiency. Thus, the air-to-air heat exchanger of the technical solution has the advantages of less dust accumulation and high heat exchange efficiency.

[0020] In the technical solution two and the preferred embodiments thereof, the first heat dissipation fan for internal circulation can be arranged outside the shell. Since the fan is arranged outside, the space available for the heat exchange core is increased, and the heat dissipation capacity of the air-to-air heat exchanger is improved.

[0021] In the technical solution three and the preferred embodiments thereof, the bottom end and the top end of the shell and the heat exchange core along the Z-axis direction form an air inlet area and an air outlet area, respectively, and the third air port and the fourth air port are in communication with the air inlet area and the air outlet area, respectively. The air inlet area is arranged to facilitate air inlet at the air inlet end of each external circulation air duct, and the air outlet area is arranged to facilitate arrangement of the second heat dissipation fan. In this way, the third air port and the fourth air port are arranged at the bottom end and the top end of the shell, respectively, and the air outlet of the fourth air port is upwardly discharged and is less likely to enter the third air port to cause the heat island effect.

[0022] In addition, the third air port is arranged at the bottom end and the outer side of the air inlet area, which is conducive to increasing the air inlet amount, and the fourth air port is arranged at the outer side of the air outlet area and is higher than the second heat dissipation fan, which is conducive to forming a structure in which the part of the shell located outside the cabinet forms a bottom air inlet and a side air outlet, thereby improving the protection of the external circulation air duct and preventing dust from accumulating in the external circulation air duct.

[0023] In the fourth aspect and the preferred embodiments thereof, the outer circulating air duct penetrates the heat exchange core along the Z-axis direction and has an air inlet end and an air outlet end at two ends thereof, so that the outer circulating air duct has small air resistance and is less likely to accumulate dust; the inner circulating air duct includes a plurality of pipes, both ends of each pipe being open to the first side of the heat exchange core along the X-axis direction and forming an air supply end and an air return end, respectively, each air supply end and each air return end of each inner circulating air duct being arranged along the Z-axis direction, the air resistance of the pipes being large, and the air flow staying in the inner circulating air duct for a longer time when passing through the inner circulating air duct, but it should be understood that although the air resistance of the pipes is increased, the air flow in the pipes is still fast, and since the inner circulating air duct and the outer circulating air duct are arranged alternately along the Y-axis direction, the inner circulating air flow and the outer circulating air flow can fully exchange heat, thereby improving the heat exchange efficiency; wherein the inner circulating air duct is provided with a plurality of pipes, and the structure design of the pipes also allows the air flow to flow through each part of the inner circulating air duct when passing through the inner circulating air duct, thereby avoiding the part far from the first side of the heat exchange core along the X-axis direction from not passing through the air, and further improving the heat exchange efficiency of the inner circulating air duct and the outer circulating air duct; therefore, the outer circulating air duct of the present technical solution is less likely to accumulate dust, and the inner circulating air duct and the outer circulating air duct have high heat exchange efficiency.

[0024] In the fifth aspect and the preferred embodiments thereof, the structure of the pipes is beneficial to production and processing, and is more beneficial to balancing the air resistance and the air speed, thereby increasing the heat exchange efficiency of the inner circulating air duct and the outer circulating air duct.

[0025] In the sixth aspect and the preferred embodiments thereof, the first section is provided with a plurality of first sub-inner air ducts parallel to each other, the second section is provided with a plurality of second sub-inner air ducts parallel to each other, and the third section is provided with a plurality of third sub-inner air ducts parallel to each other, so that the heat exchange area of the pipes is larger than that of the pipes without the sub-inner air ducts, thereby further increasing the heat exchange efficiency of the inner circulating air duct and the outer circulating air duct.

[0026] In the seventh aspect and the preferred embodiments thereof, the first sub-inner air duct and the corresponding third sub-inner air duct are communicated, and the second sub-inner air duct and the corresponding third sub-inner air duct are communicated, which is beneficial to avoiding excessive air resistance.

[0027] In the eighth aspect and the preferred embodiments thereof, the gap is formed between the first sub-inner air duct and the third sub-inner air duct, and the gap is formed between the second sub-inner air duct and the third sub-inner air duct. Compared with the fourth aspect, the first sub-inner air duct and the third sub-inner air duct do not need to be communicated, and the third sub-inner air duct and the second sub-inner air duct do not need to be communicated, so that the splicing step is omitted, the processing is facilitated, and the inner circulation air flow changes from the laminar flow to the turbulent flow and is mixed and uniformly heated in the gap between the first sub-inner air duct and the second sub-inner air duct after passing through each first sub-inner air duct, and then changes from the laminar flow to the turbulent flow and is mixed and uniformly heated in the gap between the third sub-inner air duct and the second sub-inner air duct after passing through each third sub-inner air duct, and finally changes from the laminar flow to the turbulent flow after passing through each second sub-inner air duct. The turbulent flow at the gap increases the heat exchange efficiency at the corner of the U-shaped duct, and improves the uniformity of the inner circulation air flow at each air outlet end.

[0028] In the ninth aspect and the preferred embodiments thereof, the outer circulation air duct is provided with a plurality of sub-outer air ducts extending along the Z-axis direction in parallel with each other. Compared with the aspect in which only one sub-outer air duct is formed in the outer circulation air duct, the heat exchange area of the outer circulation air duct is larger, and the heat exchange efficiency of the inner circulation air duct and the outer circulation air duct is further increased.

[0029] The tenth aspect has the technical advantages of any one of the first aspect to the ninth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the embodiment description are briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 It is a schematic diagram of the energy storage converter of the embodiment of the present application;

[0032] Figure 2 It is a schematic diagram of the heat exchange core of the embodiment of the present application;

[0033] Figure 3 It is a left view of Figure 1 ;

[0034] Figure 4 It is a cross-sectional view in the A-A direction of Figure 3 ;

[0035] Figure 5 It is a cross-sectional view in the B-B direction of Figure 3 ;

[0036] Figure 6 It is a cross-sectional view in the C-C direction of Figure 5 ;

[0037] Figure 7 For Figure 5 A sectional view in the D-D direction.

[0038] Explanation of the main reference signs:

[0039] Cabinet 100; first side wall 101; air-to-air heat exchanger 200; heat exchange core 10; inner circulation air duct 11; pipe 110; first section 111; first inner sub-air duct 1111; second section 112; second inner sub-air duct 1121; third section 113; third inner sub-air duct 1131; air supply end 114; air return end 115; air supply port 01; air return port 02; outer circulation air duct 12; sub-outer air duct 121; air inlet end 122; air outlet end 123; air inlet port 03; air outlet port 04; shell 20; first air port 21; second air port 22; third air port 23; fourth air port 24; air inlet area 25; air outlet area 26; first heat dissipation fan 30; second heat dissipation fan 40. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as excluding other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the claims, description and above drawings of the present application, unless otherwise explicitly limited, the terms such as "first", "second" or "third" are used only to distinguish different objects, and are not used to describe a specific order.

[0042] In the claims, description and above drawings of the present application, unless otherwise explicitly limited, for the terms of orientation, such as "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation and position relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, so it cannot be understood as limiting the specific protection scope of the present application.

[0043] In the claims, the specification, and the above drawings, unless otherwise specified, the terms "fixedly connected" or "fixedly connected" should be interpreted broadly, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0044] In the claims, the specification, and the above drawings, the terms "including", "having" and their variants are intended to mean "including but not limited to".

[0045] In the claims and the specification except for the examples, the terms "X-axis direction", "Y-axis direction" and "Z-axis direction" only refer to the characteristics with one of the above directions and the characteristics with another direction perpendicular to each other, and it is not required to be implemented according to the "X-axis direction", "Y-axis direction" and "Z-axis direction" introduced in the examples. In the examples, 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 up and down.

[0046] Referring to Figure 1 , Figure 1 An energy storage converter is shown, comprising a cabinet 100 and an air-to-air heat exchanger 200. In practical application, the energy storage converter further comprises electrical components arranged in the cabinet 100. The cabinet 100 forms a closed structure inside to improve the protection of the electrical components. The air-to-air heat exchanger 200 is installed on the cabinet 100 and used for heat dissipation of the electrical components. The cabinet 100 is in the shape of a rectangular cuboid, the length direction is the X-axis direction, the width direction is the Y-axis direction, and the height direction is the Z-axis direction. The cabinet 100 is provided with a first side wall 101 perpendicular to the X-axis direction.

[0047] Referring to Figures 1-7 , the air-to-air heat exchanger 200 is installed on the first side wall 101, which comprises a heat exchange core 10, a shell 20, a first heat dissipation fan 30 and a second heat dissipation fan 40.

[0048] Referring to Figure 2 , the heat exchange core 10 is in the shape of a rectangular cuboid, and the heat exchange core 10 is provided with a plurality of inner circulation air ducts 11 and outer circulation air ducts 12 arranged alternately along the Y-axis direction.

[0049] Referring to Figures 3-4 , Figures 6-7The inner circulation air duct 11 is provided with a plurality of pipes 110, both ends of the pipe 110 are opened on the first side of the heat exchange core 10 along the X-axis direction and form the air supply end 114 and the air return end 115 respectively, and each air supply end 114 and each air return end 115 of each inner circulation air duct 11 is arranged along the Z-axis direction; each air supply end 114 and each air return end 115 of each inner circulation air duct 11 form the air supply port 01 and the air return port 02 respectively.

[0050] The pipe 110 is U-shaped, which is provided with a first section 111 communicating with the air supply end 114, a second section 112 communicating with the air return end 115, and a third section 113 communicating the first section 111 and the second section 112; the first section 111 and the second section 112 both extend along the X-axis direction, and the third section 113 extends along the Z-axis direction; each first section 111 and each second section 112 in each inner circulation air duct 11 are arranged along the Z-axis direction, and each third section 113 is arranged along the X-axis direction.

[0051] The first section 111 is provided with a plurality of first inner air ducts 1111 parallel to each other, the second section 112 is provided with a plurality of second inner air ducts 1121 parallel to each other, and the third section 113 is provided with a plurality of third inner air ducts 1131 parallel to each other. In practical application, the first section 111, the second section 112 and the third section 113 are respectively provided with heat exchange fins to form the first inner air duct 1111, the second inner air duct 1121 and the third inner air duct 1131. In this embodiment, gaps are formed between the first inner air duct 1111 and the third inner air duct 1131, and gaps are formed between the second inner air duct 1121 and the third inner air duct 1131. However, it should be understood that in other embodiments, the number of the first inner air duct 1111, the second inner air duct 1121 and the third inner air duct 1131 is equal and one-to-one correspondence, the first inner air duct 1111 and the corresponding third inner air duct 1131 are communicated, and the second inner air duct 1121 and the corresponding third inner air duct 1131 are communicated.

[0052] Referring to Figures 5-7 The outer circulation air duct 12 penetrates the heat exchange core 10 along the Z-axis direction and its both ends form the air inlet end 122 and the air outlet end 123 respectively, the air inlet end 122 and the air outlet end 123 of each outer circulation air duct 12 form the air inlet port 03 and the air outlet port 04 respectively, and the outer circulation air duct 12 is provided with a plurality of sub-outer air ducts 121 parallel to each other and extending along the Z-axis direction. In practical application, heat exchange fins are fixed in each outer circulation air duct 12 to form a plurality of sub-outer air ducts 121.

[0053] Referring to Figure 1 , Figures 4-5The shell 20 is embedded in the first side wall 101 and used for accommodating the heat exchange core 10. The part of the shell 20 in the cabinet 100 is provided with the first air port 21 communicated with the air supply port 01 and the second air port 22 communicated with the air return port 02. The part of the shell 20 outside the cabinet 100 is provided with the third air port 23 communicated with the air inlet port 03 and the fourth air port 24 communicated with the air outlet port 04. In the embodiment, the shell 20 is in the shape of a cuboid. The length of the shell 20 along the X axis is similar to the length of the heat exchange core 10 along the X axis. 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. However, the height of the shell 20 along the Z axis is higher than the height of the heat exchange core 10 along the Z axis. The bottom end and the top end of the shell 20 and the heat exchange core 10 along the Z axis form the air inlet area 25 and the air outlet area 26 respectively. The third air port 23 and the fourth air port 24 are communicated with the air inlet area 25 and the air outlet area 26 respectively. The third air port 23 is located at the bottom end and the outer side of the air inlet area 25. The fourth air port 24 is located at the outer side of the air outlet area 26.

[0054] The first heat dissipation fan 30 is fixed relative to the shell 20 and used for driving the air to flow from the air return port 02 to the air supply port 01. In the embodiment, the first heat dissipation fan 30 is fixed at the first air port 21 of the shell 20.

[0055] The second heat dissipation fan 40 is fixed relative to the shell 20 and used for driving the air to flow from the air inlet port 03 to the air outlet port 04. In the embodiment, the second heat dissipation fan 40 is located in the air outlet area 26 and lower than the fourth air port 24, that is, the fourth air port 24 is higher than the second heat dissipation fan 40.

[0056] In the embodiment, the inner circulation air duct 11 of the heat exchange core 10 has a pipe structure for flow distribution. In other embodiments, the heat exchange core 10 can not have the above structure. In addition, the positions of the heat dissipation fans can be exchanged according to the air inlet and outlet directions. For example, the first heat dissipation fan 30 can be located at the second air port 22 and the second heat dissipation fan 40 can be located in the air inlet area 25. Only the air flow directions of the corresponding fans need to be exchanged.

[0057] In the embodiment, the air-to-air heat exchanger 200 is vertically arranged on the first side wall 101 of the electrical cabinet, and the shell 20 defines the air inlet area 25, the heat exchange area and the air outlet area 26 in sequence in the vertical direction, the first air port 21 and the second air port 22 correspond to the heat exchanger area for the internal circulation ventilation, and the third air port 23 and the fourth air port 24 correspond to the air inlet area 25 and the air outlet area 26 for the external circulation ventilation. Then, the heat exchange core 10 is correspondingly arranged in the heat exchange area 25, so that the external circulation air duct 12 in the heat exchange core 10 is arranged in the vertical direction, the air resistance is small, and the dust in the low protection air flow of the external circulation is prevented from accumulating at the corner of the external circulation air duct 12 of the heat exchange core 10 after long-term use, thereby reducing the heat exchange efficiency. Therefore, the air-to-air heat exchanger 200 has the advantages of not easy to accumulate dust and high heat exchange efficiency.

[0058] In the embodiment, the first heat dissipation fan 30 for internal circulation can be arranged outside the shell 20. Since the fan is arranged outside, the space that can be occupied by the heat exchange core 10 is increased, and the heat dissipation capacity of the air-to-air heat exchanger 200 is improved.

[0059] In the embodiment, the bottom end and the top end of the shell 20 and the heat exchange core 10 along the Z-axis direction form the air inlet area 25 and the air outlet area 26, respectively, and the third air port 23 and the fourth air port 24 are in communication with the air inlet area 25 and the air outlet area 26, respectively. The air inlet area 25 is beneficial to the air inlet of the air inlet end 122 of each external circulation air duct 12, and the air outlet area 25 is beneficial to the arrangement of the second heat dissipation fan 40. In this way, the third air port 23 and the fourth air port 24 are located at the bottom end and the top end of the shell 20, respectively, the air outlet of the fourth air port 24 is upward, and it is not easy to enter the third air port 23 to cause the heat island effect. The third air port 23 is located at the bottom end and the outer side of the air inlet area 25, which is beneficial to increasing the air inlet amount, and the fourth air port 24 is located at the outer side of the air outlet area 26 and is higher than the second heat dissipation fan 40, which is beneficial to forming the structure that the part of the shell 20 located outside the cabinet forms the bottom air inlet and the side air outlet, improves the protection of the external circulation air duct, and makes the external circulation air duct not easy to accumulate dust.

[0060] In the embodiment, the outer circulating air duct 12 penetrates the heat exchange core 10 along the Z-axis direction and has an air inlet end 122 and an air outlet end 123 at two ends, so that the outer circulating air duct 12 has small air resistance and is less likely to accumulate dust; the inner circulating air duct 11 includes a plurality of pipes 110, the two ends of the pipe 110 are open to the first side of the heat exchange core 10 along the X-axis direction and form an air supply end 114 and an air return end 115, respectively, the air supply end 114 and the air return end 115 of each inner circulating air duct 11 are arranged along the Z-axis direction, the air resistance of the pipe 110 is large, and the air flow stays in the inner circulating air duct 11 for a longer time when passing through the inner circulating air duct 11, but it should be understood that although the air resistance of the pipe 110 is increased, the air flow in the pipe 110 is still fast, and since the inner circulating air duct 11 and the outer circulating air duct 12 are alternately arranged along the Y-axis direction, the inner circulating air flow can fully exchange heat with the outer circulating air flow, thereby improving the heat exchange efficiency; wherein the inner circulating air duct 11 is provided with a plurality of pipes 110, and the structure design of the pipe 110 also makes the air flow flow through each part of the inner circulating air duct 11 when passing through the inner circulating air duct 11, avoiding the part far away from the first side of the heat exchange core 10 along the X-axis direction not passing through the air, thereby further improving the heat exchange efficiency of the inner circulating air duct 11 and the outer circulating air duct 12; therefore, the outer circulating air duct 12 of the technical scheme is less likely to accumulate dust, and the heat exchange efficiency of the inner circulating air duct 11 and the outer circulating air duct 12 is high.

[0061] In the embodiment, the structure of the pipe 110 is beneficial to production and processing, and is more beneficial to balance the air resistance and the air speed, thereby increasing the heat exchange efficiency of the inner circulating air duct 11 and the outer circulating air duct 12.

[0062] In the embodiment, the first section 111 is provided with a plurality of first inner air ducts 1111 parallel to each other, the second section 112 is provided with a plurality of second inner air ducts 1121 parallel to each other, and the third section 113 is provided with a plurality of third inner air ducts 1131 parallel to each other, compared with the scheme in which no inner air duct is arranged in the pipe 110, the heat exchange area of the pipe 110 is larger, and the heat exchange efficiency of the inner circulating air duct 11 and the outer circulating air duct 12 is further increased.

[0063] In the embodiment, gaps are formed between the first sub-inner air ducts 1111 and the third sub-inner air ducts 1131 and between the second sub-inner air ducts 1121 and the third sub-inner air ducts 1131, and the first sub-inner air ducts 1111 and the third sub-inner air ducts 1131 do not need to be communicated, and the third sub-inner air ducts 1131 and the second sub-inner air ducts 1121 do not need to be communicated, so that the splicing step is omitted, processing is facilitated, and the inner circulation air flow changes from laminar flow to turbulent flow and mixes and is uniformly heated in the gap between the first sub-inner air duct 1111 and the second sub-inner air duct after passing through each first sub-inner air duct 1111, then changes to laminar flow after passing through each third sub-inner air duct 1131, and then changes from laminar flow to turbulent flow and mixes and is uniformly heated in the gap between the third sub-inner air duct 1131 and the second sub-inner air duct 1121, and finally changes to laminar flow after passing through each second sub-inner air duct 1121. The turbulent flow at the gap increases the heat exchange efficiency at the corner of the U-shaped pipe 110, and improves the uniformity of the inner circulation air flow at each air outlet end 123. In other embodiments, the first sub-inner air duct 1111 and the corresponding third sub-inner air duct 1131 are communicated, and the second sub-inner air duct 1121 and the corresponding third sub-inner air duct 1131 are communicated, which is beneficial to avoid excessive air resistance.

[0064] In the embodiment, the outer circulation air duct 12 is provided with a plurality of sub-outer air ducts 121 extending in the Z-axis direction and parallel to each other, and compared with the scheme in which only one sub-outer air duct 121 is formed in the outer circulation air duct 12, the heat exchange area of the outer circulation air duct 12 is larger, and the heat exchange efficiency of the inner circulation air duct 11 and the outer circulation air duct 12 is further increased.

[0065] The above description and embodiment are used to explain the protection scope of the utility model, but do not constitute the limitation of the protection scope of the utility model. Through the inspiration of the utility model or the above embodiment, the modification, equivalent replacement or other improvement of the utility model embodiment or one part of the technical features obtained by the ordinary skilled person in the art combining with the common knowledge, the ordinary technical knowledge in the art and / or the prior art through logical analysis, reasoning or limited test should be included in the protection scope of the utility model.

Claims

1. An air-to-air heat exchanger for installation on an electrical cabinet on a first side wall (101) perpendicular to the horizontal X-axis direction; characterized in that, The utility model relates to an electric cabinet cooling device, which comprises: a shell (20) forming a containing cavity and having a first side and a second side opposite to each other and close to and away from the first side wall (101) respectively; the first side is provided with a first air port (21) and a second air port (22) for the air flow into and out of the electric cabinet, and the second side is provided with a third air port (23) and a fourth air port (24) for the air flow into and out of the electric cabinet; the containing cavity defines an air inlet area (25), a heat exchange area and an air outlet area (26) in sequence along the vertical Z-axis direction; in the Z-axis direction, the air inlet area (25) and the air outlet area (26) correspond to the third air port (23) and the fourth air port (24) respectively, and the first air port (21) and the second air port (22) correspond to the heat exchange area; a heat exchange core (10) provided in the heat exchange area and forming a plurality of internal circulation air ducts (11) and external circulation air ducts (12) arranged alternately along the horizontal Y-axis direction; each internal circulation air duct (11) communicates the first air port (21) and the second air port (22); each external circulation air duct (12) extends along the Z-axis direction and communicates the air inlet area (25) and the air outlet area (26) to communicate the third air port (23) and the fourth air port (24); a first heat dissipation fan (30) fixed relative to the shell (20) and used for driving the air flow in the electric cabinet from the second air port (22) to the first air port (21); and a second heat dissipation fan (40) fixed relative to the shell (20) and used for driving the air flow outside the electric cabinet from the third air port (23) to the fourth air port (24).

2. The air-to-air heat exchanger of claim 1, wherein: The shell (20) is embedded in the first side wall (101); the first heat dissipation fan (30) is arranged outside the shell (20) and corresponds to the first air port (21) or the second air port (22), and the second heat dissipation fan (40) is arranged inside the shell and located in the air inlet area (25) and the air outlet area (26).

3. The air-to-air heat exchanger of claim 2, wherein: The first heat dissipation fan (30) is fixed to the first air port (21) of the shell (20), and the second heat dissipation fan (40) is arranged in the air outlet area (26); The third air port (23) is located at the bottom end and the outer side of the air inlet area (25), and the fourth air port (24) is located at the outer side of the air outlet area (26) and higher than the second heat dissipation fan (40).

4. The air-to-air heat exchanger of claim 3, wherein: The internal circulation air duct (11) is provided with a plurality of pipes (110); the two ends of the pipe (110) are both opened to the first side of the heat exchange core (10) along the X-axis direction and form a supply air end (114) and a return air end (115) respectively, and each supply air end (114) and each return air end (115) of each internal circulation air duct (11) is arranged along the Z-axis direction; the external circulation air duct (12) penetrates through the heat exchange core (10) along the Z-axis direction and forms an air inlet end (122) and an air outlet end (123) at its two ends respectively; Each air supply end (114) and each air return end (115) of each inner circulation air duct (11) forms an air supply port (01) and an air return port (02) respectively, and each air inlet end (122) and each air outlet end (123) of each outer circulation air duct (12) forms an air inlet port (03) and an air outlet port (04) respectively; The air supply port (01) is communicated with the first air port (21), the air return port (02) is communicated with the second air port (22), the air inlet port (03) is communicated with the third air port (23), and the air outlet port (04) is communicated with the fourth air port (24).

5. The air-to-air heat exchanger of claim 4, wherein: The pipeline (110) is in a U shape, which is provided with a first section (111) communicated with the air supply end (114), a second section (112) communicated with the air return end (115), and a third section (113) communicated with the first section (111) and the second section (112); the first section (111) and the second section (112) extend along the X-axis direction, and the third section (113) extends along the Z-axis direction; each first section (111) and each second section (112) in each inner circulation air duct (11) are arranged along the Z-axis direction, and each third section (113) is arranged along the X-axis direction.

6. The air-to-air heat exchanger of claim 5, wherein: The first section (111) is provided with a plurality of first sub-inner air ducts (1111) parallel to each other, the second section (112) is provided with a plurality of second sub-inner air ducts (1121) parallel to each other, and the third section (113) is provided with a plurality of third sub-inner air ducts (1131) parallel to each other.

7. The air-to-air heat exchanger of claim 6, wherein: The number of the first sub-inner air duct (1111), the second sub-inner air duct (1121) and the third sub-inner air duct (1131) is equal and one-to-one correspondence, the first sub-inner air duct (1111) and the corresponding third sub-inner air duct (1131) are communicated, and the second sub-inner air duct (1121) and the corresponding third sub-inner air duct (1131) are communicated.

8. The air-to-air heat exchanger of claim 6, wherein: The first sub-inner air duct (1111) and the third sub-inner air duct (1131) form a gap, and the second sub-inner air duct (1121) and the third sub-inner air duct (1131) form a gap.

9. The air-to-air heat exchanger of claim 4, wherein: The outer circulation air duct (12) is provided with a plurality of sub-outer air ducts (121) parallel to each other and extending along the Z-axis direction.

10. An energy storage converter, characterized by It comprises a cabinet body (100) and an air-to-air heat exchanger (200) as claimed in any one of claims 1-9; the cabinet body (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 port (21) and the second air port (22) are located in the cabinet body (100), and the third air port (23) and the fourth air port (24) are located outside the cabinet body (100).

Images