Heat exchange device and electrical cabinet

Abstract

This utility model discloses a heat exchange device and an electrical cabinet. The heat exchange device is used in a cabinet with a parallel cabinet surface and includes a shell and several heat exchange units. A receiving cavity is formed inside the shell, and the shell has an exhaust port and a second air inlet. The heat exchange units are placed in the receiving cavity. Each heat exchange unit has an inner cavity communicating with the corresponding exhaust port and a cooling fan installed at the exhaust port. Each heat exchange unit includes two heat exchange sections, both inclined relative to the Y-axis and Z-axis directions. The inner cavity is connected to the second air inlet through an air passage. The cooling fan drives airflow from the second air inlet through each air passage to the exhaust port. The electrical cabinet includes the aforementioned heat exchange device. This application maintains high heat dissipation efficiency even when the cabinets are parallel.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, specifically to a heat exchange device and electrical cabinet. Background Technology

[0002] Electrical cabinets such as photovoltaic inverters and energy storage converters typically have high heat dissipation requirements. The air inlets and outlets of these cabinets are often located on the front and rear sides, respectively. In practical applications, multiple cabinets are often arranged at intervals along the front-to-back direction. Therefore, airflow between cabinets can interfere with each other. For example, hot air from an upstream cabinet may enter the cold air inlet of a downstream cabinet; or hot air from two cabinets may blow against each other, causing turbulent airflow and mutual interference. These factors often result in a "heat island" effect and increased equipment temperature, ultimately leading to equipment derating.

[0003] To avoid the heat island effect, existing technologies often place the air outlet at the top of the electrical cabinet and install a fan at the outlet to achieve top-out airflow from the electrical cabinet. For example, in patent CN117641836A, the air passage cavity has air intake on three sides and air outlet at the top. The heat exchange device is placed in the air passage cavity and includes two heat exchange sections. The two heat exchange sections intersect at one end in the horizontal direction and are far apart at the other end. The air passage of the heat exchange sections is horizontal. In order to ensure that the airflow completely passes through the two heat exchange sections, the cooling fan is arranged horizontally with the heat exchange sections and installed at the exhaust port at the top. Therefore, in practical applications, the diameter of the cooling fan cannot be too large due to the limitation of the depth of the electrical cabinet. As a result, the airflow of the heat exchange device is relatively insufficient, and the heat dissipation efficiency of the entire heat exchange device is relatively low.

[0004] In addition, in practical applications, there may be a need to combine electrical cabinets. In order to ensure the maintainability of electrical cabinets, the front and back of the electrical cabinets are usually not blocked. Therefore, when combining cabinets, they are mainly combined in the width direction of the cabinet, that is, the two electrical cabinets are arranged along the width direction of the cabinet. As a result, when the cabinets are combined, only one air inlet surface is left in the housing cavity, and only half of the heat exchange section can be effectively utilized, resulting in low heat dissipation efficiency.

[0005] Therefore, existing electrical cabinets cannot maintain high heat dissipation efficiency when connected in parallel. Utility Model Content

[0006] The purpose of this utility model is to overcome the above-mentioned defects or problems in the background art and to provide a heat exchange device and electrical cabinet that still have high heat dissipation efficiency when the cabinets are connected.

[0007] 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:

[0008] Technical Solution 1 and its related embodiments provide a heat exchange device for placement on the top of a cabinet, the length of the cabinet along the Y-axis is greater than its length along the X-axis, and it is adapted to be mounted along the X-axis so that the sidewalls of the cabinet perpendicular to the Y-axis form a mounting surface; the heat exchange device includes: a shell forming a accommodating cavity, an exhaust port on the top wall of the shell, and second air inlets on both sides of the shell along the Y-axis; and a heat exchange unit placed within the accommodating cavity; the heat exchange unit has an inner cavity communicating with the exhaust port and a cooling fan installed at the exhaust port, and includes two heat exchange sections enclosing at least part of the inner cavity; each heat exchange section extends along the X-axis and is inclined relative to both the Y-axis and Z-axis, and each heat exchange section also has a cooling section and several air passages; the bottom ends of the two heat exchange sections are close to each other, and the top ends are far apart from each other and located on both sides of the exhaust port along the Y-axis; the inner cavity is connected to the second air inlets through the air passages; the cooling fan is used to drive airflow from the second air inlets through the air passages to the exhaust port.

[0009] Based on technical solution one, there is also technical solution two. In technical solution two and its related embodiments, the top wall of the shell is provided with at least two exhaust ports along the Y-axis direction; the number of heat exchange units is multiple and corresponds one-to-one with each exhaust port, the inner cavity of each heat exchange unit is connected to the corresponding exhaust port, and the heat dissipation fan of each heat exchange unit is installed at the corresponding exhaust port.

[0010] Based on technical solution two, technical solution three is also provided. In technical solution three and its related embodiments, the shell is provided with a first air inlet on both sides along the X-axis direction; the heat exchange unit also includes two baffles perpendicular to the X-axis direction. The two baffles are connected to the two heat exchange parts at both ends along the X-axis direction, so that the inner cavity is connected to the first air inlet and the second air inlet only through the air passage; the cooling fan is used to drive the airflow from the first air inlet and the second air inlet through each air passage to the exhaust port.

[0011] Based on technical solution three, there is also technical solution four. In technical solution four and its related embodiments, each first air inlet includes several third air inlets that correspond one-to-one with each heat exchange unit; the heat exchange unit also includes a surrounding plate, which is located between the top wall of the shell and the top of the two heat exchange parts and the two baffles.

[0012] Based on technical solution four, technical solution five is also provided. In technical solution five and its related embodiments, the heat exchange device further includes a conveying unit. Each heat exchange section is provided with an inlet end and an outlet end. The conveying unit is located in the gap between each heat exchange section and the cavity wall of the accommodating cavity and is used to drive the coolant of each heat exchange section to flow from the inlet end to the outlet end. Each heat exchange section forms a first gap between its two sides along the X-axis and the cavity wall of the corresponding accommodating cavity. Each heat exchange section forms a second gap between one end along the Y-axis and the cavity wall of the accommodating cavity. The conveying unit includes a coolant conveying component and a coolant pipe. The coolant conveying component is located in the second gap and is connected to each inlet end and each outlet end through the coolant pipe to drive the coolant in each heat exchange section to flow from the inlet end to the outlet end.

[0013] Based on technical solution five, there is also technical solution six. In technical solution six and its related embodiments, the conveying unit further includes a liquid replenishing component. The coolant pipe is provided with a liquid replenishing end in the second interval. The liquid replenishing component is provided with a liquid supply end that is connected to the liquid replenishing end. The liquid supply end is higher than the liquid replenishing end.

[0014] Based on technical solution six, technical solution seven is also provided. In technical solution seven and its related embodiments, the top of the liquid replenishing component is provided with an expansion cap, and the expansion cap is provided with a pressure relief valve. The distance between the highest water level of the liquid in the liquid replenishing component and the top wall of the liquid replenishing component is greater than a first value. The top wall of the accommodating cavity is provided with a detachable cover plate corresponding to the expansion cap.

[0015] Based on technical solution three, there is also technical solution eight. In technical solution eight and its related embodiments, the liquid inlet ends of each heat exchanger are connected in parallel, and the liquid outlet ends of each heat exchanger are connected in parallel.

[0016] Based on technical solution three, there is also technical solution nine. In technical solution nine and its related embodiments, the two heat exchange sections of each heat exchange unit are connected in series. The liquid inlet end of one heat exchange section forms the liquid inlet of the heat exchange unit, and the liquid outlet end of the other heat exchange section forms the liquid outlet of the heat exchange unit. The liquid inlets of each heat exchange unit are connected in parallel through coolant pipes, and the liquid outlets are connected in parallel through coolant pipes.

[0017] Technical solution ten and its related embodiments provide an electrical cabinet, which includes a cabinet body and a heat exchange device as described in any one of technical solutions one to nine.

[0018] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0019] In Technical Solution 1 and its preferred embodiment, the heat exchange device is placed on top of the cabinet. The heat exchange device dissipates heat from the heat-generating components inside the cabinet. Since the cabinet's length along the Y-axis is greater than its length along the X-axis, the cabinet is generally placed alongside other cabinets along the X-axis. The heat exchange device's accommodating cavity receives air from the non-parallel cabinet side. Therefore, when cabinets are placed side-by-side, the second air inlet of the accommodating cavity in this technical solution is unobstructed, ensuring the original airflow volume. Thus, the heat exchange device in this embodiment is particularly suitable for cabinet-by-side scenarios. Furthermore, the heat exchange device exhausts air from the top, preventing hot air from being output to other adjacent electrical equipment, effectively mitigating the heat island effect.

[0020] In the second technical solution and its preferred embodiment, the arrangement of multiple heat exchange units results in a larger heat exchange area and higher heat exchange efficiency compared to the arrangement of only one large heat exchange unit. Since a cooling fan is configured for every two heat exchange sections, the diameter of the cooling fan of each heat exchange unit can be configured according to the distance between the tops of the two heat exchange sections, thereby having a larger air volume and higher heat dissipation efficiency.

[0021] In technical solution three and its preferred embodiments, the heat exchange device is further provided with a first air inlet and a baffle plate.

[0022] In practical applications, top-discharge electrical cabinets may be used in conjunction with other electrical equipment. For example, energy storage converter cabinets need to be used with energy storage containers. Although some power plant equipment suppliers have begun to implement top-discharge configurations for all power plant equipment due to the aforementioned "heat island" effect, it is still inevitable that some suppliers will still equip their equipment with side-discharge electrical devices. Since power plant users may not purchase all power plant equipment from the same supplier as a complete set, there may be a need for top-discharge energy storage converter cabinets to be used in conjunction with side-discharge energy storage containers. This means that hot air exhausted from other electrical equipment may still enter the enclosure cavity through the air inlet. When the electrical cabinet is used in conjunction with other side-discharge electrical equipment, if the air intake is from the cabinet side, the air intake area of ​​the enclosure cavity will be significantly blocked, thus affecting the overall heat dissipation efficiency of the electrical cabinet.

[0023] Even when used in conjunction with a side-exhaust electrical cabinet in a parallel configuration, the heat exchange device of this technical solution allows for cold air intake from two sides of the accommodating cavity. Furthermore, due to the baffle plate and the fact that the inner cavity is connected to the first and second air inlets only through an air duct, even if air enters the accommodating cavity along the X-axis, the airflow will not bypass the heat exchange section and flow directly to the cooling fan. Instead, it will enter the inner cavity from the outside of the heat exchange section through the air duct and then be discharged from the exhaust port. In other words, the air intake along both the X-axis and Y-axis in the accommodating cavity can carry away the heat from the heat exchange section through the air duct. In addition, since the width of the cabinet in the X-axis direction is relatively short, the width of the shell along the X-axis direction is also relatively short. The air entering through the first air inlet can be quickly redirected after being blocked by the baffle plate and can carry away the heat from the heat exchange section, resulting in higher air outlet efficiency. In other embodiments, air guide surfaces can be provided on both sides of the baffle plate along the Y-axis direction to further improve the air outlet efficiency.

[0024] Therefore, the electrical cabinet of the heat exchange device, including this technical solution, has high heat exchange efficiency and fast heat dissipation when used alone, with air intake from four sides and air exhaust from the top. When used in parallel along the X-axis, it also maintains air intake from three sides, still with a large air volume and high heat dissipation efficiency. When used in parallel along the X-axis or in conjunction with electrical cabinets with side exhaust, it still has cold air intake from two sides, thus achieving high heat dissipation efficiency. As a result, the electrical cabinet of the heat exchange device using this technical solution has high heat dissipation efficiency in a variety of application scenarios.

[0025] More importantly, the heat exchange device of this application is basically symmetrical along the X-axis and along the Y-axis, so there is no need to consider the mirror installation problem of multiple electrical cabinets used together. If the heat exchange device is asymmetrical, such as only having two vertical air intakes, then when merging cabinets, it is necessary to make the heat exchange device of the other electrical cabinet mirror symmetrical with the heat exchange device of the first electrical cabinet, thereby increasing the installation difficulty.

[0026] In the fourth technical solution and its preferred embodiment, each first air inlet includes several third air inlets corresponding one-to-one with each heat exchange unit, so that each heat exchange unit has a large air intake in the X-axis direction and high heat dissipation efficiency; the heat exchange unit also includes a surrounding plate, which is located between the top wall of the accommodating cavity and the top of the two heat exchange parts and the two baffles, further preventing the airflow from flowing directly to the exhaust port without passing through the air passage when there is a gap between the top of the heat exchange part and the top of the accommodating cavity, thus ensuring that the inner cavity is connected to the first air inlet and the second air inlet only through the air passage. In practical applications, the cooling fan can be installed in the area corresponding to the partition, making the electrical cabinet more aesthetically pleasing overall.

[0027] In technical solution five and its preferred embodiment, the conveying unit is located in the gap between each heat exchange unit and the cavity wall of the accommodating cavity. The gap here is the gap between the heat exchange unit and the bottom wall of the accommodating cavity and the gap between the heat exchange unit and the side wall of the accommodating cavity. Therefore, the above arrangement makes full use of the layout of the heat exchange unit and has a high space utilization rate.

[0028] Each heat exchange unit forms a first gap between its two sides along the X-axis and the cavity wall of its corresponding receiving chamber, and a second gap between one end of each heat exchange unit along the Y-axis and the cavity wall of its receiving chamber. This allows the conveying unit to be partially placed within the first gap and partially within the second gap, enabling the cold air from the first air inlet to also dissipate heat from the conveying unit located in the first gap. It also facilitates the flow of the cold air from the first air inlet through the air ducts near both ends of the heat exchange section. The coolant conveying component is located in the second gap, facilitating maintenance of the heat exchange device from one side of the electrical cabinet along the X-axis.

[0029] In technical solution six and its preferred embodiment, the replenishing component is located within the second interval, which facilitates maintenance of the replenishing component. The supply end of the replenishing component is higher than the replenishing end, so that the replenishing component is located at the highest position of the liquid path, thereby enabling automatic replenishment to the replenishing end under the action of gravity, and the operation is simple.

[0030] In technical solution seven, the replenishing component is equipped with an expansion cap, which has a pressure relief valve. The distance between the highest liquid level in the replenishing component and its top wall is greater than a first value. Therefore, when the pressure in the coolant pipe is high, the pressure in the coolant pipe can flow to the replenishing component, causing the liquid level in the replenishing component to rise and compress the gas above the liquid, thus opening the pressure relief valve on the expansion cap. This pressure relief valve on the expansion cap allows for pressure relief in the coolant pipe, preventing excessive pressure. When the pressure in the coolant pipe is low, the replenishing component can replenish liquid to the replenishing position under gravity. This integrates the functions of a replenishing tank and an expansion tank, ensuring the coolant pipe operates under a relatively stable pressure. Therefore, there is no need to install an expansion tank in the heat exchanger, reducing the size of the heat exchanger and making its structure compact and simple. A removable cover plate is provided on the top wall of the accommodating cavity corresponding to the expansion cap. In practical applications, the removable cover plate and expansion cap facilitate convenient replenishment of the replenishing component.

[0031] In technical solution eight, the inlet ends of each heat exchanger are connected in parallel, and the outlet ends are connected in parallel, resulting in low flow resistance and consistent temperature rise in the pipeline, thereby reducing the power consumption of the coolant delivery components.

[0032] In technical solution nine, the two heat exchange sections of each heat exchange unit are connected in series. The liquid inlet end of one heat exchange section forms the liquid inlet of the heat exchange unit, and the liquid outlet end of the other heat exchange section forms the liquid outlet of the heat exchange unit. The liquid inlets of each heat exchange unit are connected in parallel through coolant pipes, and the liquid outlets are connected in parallel through coolant pipes. The pipeline is simpler and the cost of the coolant delivery pipe is lower.

[0033] Technical solution ten has the technical advantages of any one of technical solutions one through nine. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the electrical cabinet according to the present invention;

[0036] Figure 2 This is a schematic diagram of the heat exchange device according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the hidden portion of the shell sidewall of the heat exchange device according to an embodiment of the present utility model;

[0038] Figure 4 This is a rear view of the heat exchange device according to an embodiment of the present invention, showing the hidden rear side wall and part of the enclosure.

[0039] Figure 5 This is a top view of the heat exchange device housing with its top wall hidden and a cooling fan, according to an embodiment of the present invention.

[0040] Figure 6 for Figure 3 Side view;

[0041] Figure 7 for Figure 3 Front view.

[0042] Explanation of key figure labels:

[0043] Cabinet 100; Shell 10; Receiving cavity 11; Exhaust vent 12; First air inlet 13; Second air inlet 14; Third air inlet 15; Cover plate 16; Heat exchange unit 20; Heat exchange section 21; Liquid inlet section 211; Cooling section 212; Liquid outlet section 213; Baffle plate 22; Enclosure plate 23; Cooling fan 24; Inner cavity 01; First partition 02; Second partition 03; Conveying unit 30; Coolant conveying component 31; Coolant pipe 32; Liquid replenishment end 321; Liquid replenishment component 33; Expansion cap 331; Liquid supply end 332; Electrical connector 40. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0045] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0046] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0047] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0048] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0049] In the claims and the description other than the embodiments, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" only refer to a feature having one of the aforementioned directions being perpendicular to a feature having another direction, and do not require that they be implemented according to the "X-axis direction," "Y-axis direction," and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to both the Y-axis direction and the Z-axis direction. The X-axis direction can be divided into left and right, the Y-axis direction into front and back, and the Z-axis direction into up and down.

[0050] See Figure 1-7 , Figure 1-7An electrical cabinet is shown, including a cabinet body 100 and a heat exchange device mounted on the top of the cabinet body 100.

[0051] See Figure 1 The cabinet 100 is rectangular, with its length along the Y-axis greater than its length along the X-axis. A cavity for housing electrical components can be formed within the cabinet 100. The projection of the heat exchange device along the Z-axis overlaps the projection of the cabinet 100 along the Z-axis. In this embodiment, the length of the heat exchange device is the same as the length of the cabinet 100, and the width of the heat exchange device is the same as the width of the cabinet 100.

[0052] See Figure 2-7 The heat exchange device includes a shell 10, two heat exchange units 20, a conveying unit 30, and an electrical connector 40.

[0053] The housing 10 is rectangular and has an internal cavity 11. At least two exhaust vents 12 are arranged on the top wall of the housing 10 along the Y-axis. First air inlets 13 are provided on both sides of the housing 10 along the X-axis, and second air inlets 14 are provided on both sides along the Y-axis. In this embodiment, there are two exhaust vents 12.

[0054] See Figure 3 and Figure 5 Each heat exchange unit 20 corresponds to one exhaust port 12 and is placed in the receiving cavity 11. Each heat exchange unit 20 has an inner cavity 01 communicating with the corresponding exhaust port 12 and a cooling fan 24 installed at the exhaust port 12. It includes two heat exchange sections 21 that enclose the sidewall of the inner cavity 01, two baffles 22 perpendicular to the X-axis direction, and a surrounding plate 23. Each heat exchange section 21 extends along the X-axis direction and is inclined relative to the Y-axis and Z-axis directions. Each heat exchange section 21 also has a cooling section 212 and several air passages. The bottom ends of the two heat exchange sections 21 are close to each other, and their top ends are close to each other. These are located on both sides of the corresponding exhaust vent 12 along the Y-axis; two baffles 22 are connected to the two heat exchange sections 21 at their respective ends along the X-axis; a surrounding plate 23 is disposed between the top wall of the housing 10 and the tops of the two heat exchange sections 21 and the two baffles 22. In this embodiment, the surrounding plate 23 is square-shaped, thus forming an opening at the top. The inner cavity 01 is connected to the first air inlet 13 and the second air inlet 14 only through air ducts; a cooling fan 24 is used to drive airflow from the first air inlet 13 and the second air inlet 14 through each air duct to the exhaust vent 12. In practical applications, the cooling fan 24 can be installed in the area corresponding to the surrounding plate 23, making the electrical cabinet more aesthetically pleasing.

[0055] In this embodiment, each first air inlet 13 includes several third air inlets 15 corresponding to each heat exchange unit 20. The cooling fan 24 is an exhaust fan.

[0056] See Figure 3-4 The heat exchange section 21 is alternately provided with coolant channels and air passages extending along the X-axis direction along its inclined direction. Each coolant channel forms a section to be cooled 212. In this embodiment, the two ends of the length direction of the heat exchange section 21 are respectively provided with a liquid inlet section 211 and a liquid outlet section 213. The liquid inlet section 211 is provided with a liquid inlet end, and the liquid outlet section 213 is provided with a liquid outlet end. Each coolant channel is connected to the liquid inlet section 211 and the liquid outlet section 213. That is, the heat exchange section 21 is provided with a liquid inlet section 211, a section to be cooled 212 and a liquid outlet section 213 in sequence along its length direction.

[0057] See Figure 5 Each heat exchange unit 20 forms a first gap 02 between its two sides along the X-axis and the cavity wall of the corresponding accommodating cavity 11, and a second gap 03 between one end of each heat exchange unit 20 along the Y-axis and the cavity wall of the accommodating cavity 11; the first air inlet 13 extends to the second gap 03.

[0058] The delivery unit 30 is located in the gap between each heat exchange unit 20 and the cavity wall of the receiving cavity 11 and is used to drive the coolant of each heat exchange section 21 from the inlet end to the outlet end. The gap here is the gap between the heat exchange unit 20 and the bottom wall of the receiving cavity 11 and the gap between the heat exchange unit 20 and the side wall of the receiving cavity 11. Therefore, this arrangement makes full use of the layout of the heat exchange units 20 and has a high space utilization rate. Specifically, the delivery unit 30 includes a coolant delivery component 31, a coolant pipe 32, and a replenishment component 33.

[0059] See Figure 6-7 The coolant delivery component 31 is a pump, which is located in the second interval 03 and connected to each inlet end and each outlet end through the coolant pipe 32 to drive the coolant in each part to be cooled 212 to flow from the supply end 332 to the return end.

[0060] The coolant pipe 32 is used to connect each heat exchange unit 20 and the coolant conveying component 31. In this embodiment, the inlet ends of each heat exchange unit 21 are connected in parallel, and the outlet ends are connected in parallel. Under this implementation, the flow resistance of the coolant pipe 32 is small, and the temperature rise of the pipe is uniform, thereby reducing the power consumption of the coolant conveying component 31. The coolant pipe 32 is mainly arranged in the first interval 02 and the second interval 03.

[0061] See Figure 3 and Figure 7 The coolant pipe 32 has a replenishment end 321 within the second interval 03. The replenishment component 33 has a supply end 332 communicating with the replenishment end 321, and the supply end 332 is higher than the replenishment end 321. The top of the replenishment component 33 has an expansion cap 331, and the expansion cap 331 has a pressure relief valve. The pressure relief valve can adopt existing technology, which will not be described in detail in this embodiment. The distance between the highest water level of the liquid in the replenishment component 33 and the top wall of the replenishment component 33 is greater than a first value; see [link to previous section]. Figure 2The top wall of the accommodating cavity 11 is provided with a removable cover plate 16 corresponding to the expansion cover 331.

[0062] Electrical connector 40 is used to connect the heat exchange device to the outside, and it is located at one end along the X-axis direction within the second interval 03. In this embodiment, electrical connector 40 is used to connect the heat exchange device to the electrical components inside the cabinet 100.

[0063] In other embodiments, the two heat exchange sections 21 of each heat exchange unit 20 are connected in series, wherein the liquid inlet end of one heat exchange section 21 forms the liquid inlet of the heat exchange unit 20, and the liquid outlet end of the other heat exchange section 21 forms the liquid outlet of the heat exchange unit 20. The liquid inlets of each heat exchange unit 20 are connected in parallel through the coolant pipe 32, and the liquid outlets are connected in parallel through the coolant pipe 32. In this embodiment, the pipeline is simpler and the cost of the coolant delivery pipe is lower.

[0064] In other embodiments, one end of each heat exchange unit 20 along the Y-axis direction may not form a second gap with the cavity wall of the accommodating cavity 11. In this case, the components of the conveying unit 30 are distributed in the gap between the heat exchange section 21 and the bottom wall of the accommodating cavity 11.

[0065] In this embodiment, the accommodating cavity 11 has air intake on four sides and air exhaust at the top. Since the length of the electrical cabinet along the Y-axis is greater than its length along the X-axis, the electrical cabinet is usually paralleled with other electrical equipment along the X-axis. In this case, the accommodating cavity 11 in this embodiment still has air intake on at least two sides. In conventional use, the paralleling of electrical cabinets often involves two electrical cabinets. Therefore, after paralleling, the accommodating cavity 11 can basically maintain air intake on three sides. Even when used with an electrical cabinet that exhausts air from the side, the accommodating cavity 11 still has cold air intake on two sides. The arrangement of multiple heat exchange units 20 results in a larger heat exchange area and higher heat exchange efficiency compared to setting only one large heat exchange unit. Since a cooling fan 24 is configured for every two heat exchange sections 21, the diameter of the cooling fan 24 of each heat exchange unit 20 can be configured according to the distance between the tops of the two heat exchange sections 21, thus having a large air volume and high heat dissipation efficiency. In addition, Due to the baffle plate 22 and the fact that the inner cavity 01 is connected to the first air inlet 13 and the second air inlet 14 only through the air passage, even if the accommodating cavity 11 receives air along the X-axis, the airflow will not flow directly to the cooling fan 24 without passing through the heat exchange section 21. Instead, it will enter the inner cavity 01 from the outside of the heat exchange section 21 through the air passage and then be discharged from the exhaust port 12. That is, the airflow in the accommodating cavity 11 along the X-axis and the Y-axis can both carry away the heat of the heat exchange section 21 through the air passage. In addition, since the cabinet 100 is relatively short in the X-axis direction and the shell 10 is also relatively short in the X-axis direction, the air entering through the first air inlet 13 can be quickly turned and carried away by the heat exchange section 21 after being blocked by the baffle plate 22, resulting in higher air outlet efficiency. In other embodiments, air guide surfaces can be provided on both sides of the baffle plate 22 along the Y-axis direction to further improve the air outlet efficiency.

[0066] Therefore, the electrical cabinet in this embodiment, when used alone, has air intake from four sides and air exhaust from the top, resulting in high heat exchange efficiency and fast heat dissipation efficiency; when used in parallel along the X-axis, it also maintains air intake from three sides, still having a large air intake volume and high heat dissipation efficiency; and when used in parallel along the X-axis or in conjunction with electrical cabinets with side exhaust, it still has cold air intake from two sides, resulting in high heat dissipation efficiency; thus, the electrical cabinet in this embodiment has high heat dissipation efficiency in a variety of application scenarios.

[0067] More importantly, the heat exchange device in this embodiment is basically symmetrical along the X-axis and the Y-axis. Therefore, there is no need to consider the mirror installation problem of multiple electrical cabinets. If the heat exchange device is asymmetrical, such as having only two vertical air intakes, then when merging cabinets, the heat exchange device of the other electrical cabinet needs to be mirror symmetrical with the heat exchange device of the first electrical cabinet, which increases the installation difficulty.

[0068] In this embodiment, each first air inlet 13 includes several third air inlets 15 corresponding one-to-one with each heat exchange unit 20, so that each heat exchange unit 20 has a large air intake in the X-axis direction and high heat dissipation efficiency. The first air inlet 13 extends into the second interval 02, thus ensuring heat dissipation of the conveying unit 30 and the electrical connector 40.

[0069] In this embodiment, each heat exchange unit 20 forms a first gap 02 between its two sides along the X-axis and the cavity wall of the corresponding accommodating cavity 11, which facilitates the placement of the conveying unit 30 within the first gap 02 and allows the cold air from the first air inlet 13 to dissipate heat from the conveying unit 30 located within the first gap 02. This also makes it easier for the cold air from the first air inlet 13 to pass through the air passages near both ends of the heat exchange section 21.

[0070] In this embodiment, the coolant delivery component 31, the replenishment component 33, and the electrical connector 40 are all located in the second interval 03. This facilitates maintenance of the heat exchange device from one side of the electrical cabinet along the X-axis. Furthermore, placing the electrical connector 40, which connects the electrical cabinet to the external electrical system, within the second interval 03 provides better protection for the electrical components within the cabinet 100 compared to placing it in other parts of the cabinet 100, and also facilitates maintenance and operation. The electrical connector 40 is located at one end of the second interval 03 along the X-axis, achieving water and electricity separation as much as possible and facilitating modular electrical wiring.

[0071] In this embodiment, the supply end 332 of the replenishing component 33 is higher than the replenishing end 321, so that the replenishing component 33 is located at the highest position of the liquid path, thereby realizing the automatic replenishment function to the replenishing end 321 under the action of gravity, which is simple to operate; the replenishing component 33 is provided with an expansion cap 331, and the expansion cap 331 is provided with a pressure relief valve. The distance between the highest water level of the liquid in the replenishing component 33 and the top wall of the replenishing component 33 is greater than a first value. Therefore, when the pipeline pressure of the coolant pipe 32 is large, the pressure of the coolant pipe 32 can flow to the replenishing component 33, the liquid level of the replenishing component 33 rises and squeezes the air above the liquid. The expansion cap 331's pressure relief valve opens, allowing pressure relief in the coolant pipe 32 and preventing excessive pressure. When the coolant pipe 32's pressure is low, the replenishing component 33 replenishes coolant to the replenishing position under gravity. This integrates the functions of a replenishing tank and an expansion tank, ensuring the coolant pipe 32 operates under a relatively stable pressure. Therefore, an expansion tank is unnecessary in the heat exchanger, reducing its size and making the structure compact and simple. A removable cover plate 16 is provided on the top wall of the accommodating cavity 11 corresponding to the expansion cap 331. In practical applications, the removable cover plate 16 and expansion cap 331 facilitate the replenishing of coolant to the replenishing component 33.

[0072] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A heat exchange device for being placed on the top of a cabinet (100) which has a length along the Y axis direction greater than its length along the X axis direction and is adapted to be placed along the X axis direction with the side wall of the cabinet (100) perpendicular to the Y axis direction constituting the cabinet face; characterized in that, The heat exchange device includes: A housing (10) having a cavity (11) therein, an exhaust port (12) is provided on the top wall of the housing (10), and second air inlets (14) are provided on both sides of the housing (10) along the Y-axis direction; and A heat exchange unit (20) is placed inside a receiving cavity (11). The heat exchange unit (20) is provided with an inner cavity (01) communicating with an exhaust port (12) and a cooling fan (24) installed at the exhaust port (12). It includes two heat exchange sections (21) that enclose at least part of the inner cavity (01). Each heat exchange section (21) extends along the X-axis and is inclined relative to the Y-axis and Z-axis directions. Each heat exchange section (21) is also provided with a cooling section (212) and several air passages. The bottom ends of the two heat exchange sections (21) are close to each other, and the top ends are far apart from each other and are located on both sides of the exhaust port (12) along the Y-axis direction. The inner cavity (01) is connected to the second air inlet (14) through the air passages. The cooling fan (24) is used to drive the airflow from the second air inlet (14) through each air passage to the exhaust port (12).

2. The heat exchange device as described in claim 1, characterized in that: The top wall of the housing (10) is provided with at least two exhaust vents (12) along the Y-axis direction; The number of heat exchange units (20) is multiple and corresponds one-to-one with each exhaust port (12). The inner cavity (01) of each heat exchange unit (20) is connected to the corresponding exhaust port (12), and the heat dissipation fan (24) of each heat exchange unit (20) is installed at the corresponding exhaust port (12).

3. A heat exchange device as claimed in claim 2, characterised in that: The housing (10) is also provided with a first air inlet (13) on both sides along the X-axis direction; The heat exchange unit (20) also includes two baffles (22) perpendicular to the X-axis direction. The two baffles (22) are respectively connected to the two heat exchange parts (21) at both ends along the X-axis direction, so that the inner cavity (01) is connected to the first air inlet (13) and the second air inlet (14) only through the air passage. The cooling fan (24) is used to drive the airflow from the first air inlet (13) and the second air inlet (14) through each air passage to the exhaust port (12).

4. A heat exchange device as claimed in claim 3, wherein Each first air inlet (13) includes several third air inlets (15) corresponding one-to-one with each heat exchange unit (20); the heat exchange unit (20) also includes a surrounding plate (23), which is located between the top wall of the shell (10) and the top of the two heat exchange parts (21) and the two baffles (22).

5. A heat exchange device as claimed in claim 4, wherein The heat exchange device also includes a conveying unit (30), and each heat exchange section (21) is provided with an inlet end and an outlet end; the conveying unit (30) is located in the gap between each heat exchange section (20) and the cavity wall of the accommodating cavity (11) and is used to drive the coolant of each heat exchange section (21) to flow from the inlet end to the outlet end; Each heat exchange unit (20) forms a first gap (02) between its two sides along the X-axis and the cavity wall of the corresponding accommodating cavity (11); each heat exchange unit (20) forms a second gap (03) between one end along the Y-axis and the cavity wall of the accommodating cavity (11); the conveying unit (30) includes a coolant conveying component (31) and a coolant pipe (32), the coolant conveying component (31) is located in the second gap (03) and is connected to each inlet end and each outlet end through the coolant pipe (32) to drive the coolant in each heat exchange section (21) to flow from the inlet end to the outlet end.

6. A heat exchange device as claimed in claim 5, wherein The delivery unit (30) further includes a liquid replenishment component (33). The coolant pipe (32) is provided with a liquid replenishment end (321) in the second interval (03). The liquid replenishment component (33) is provided with a liquid supply end (332) that communicates with the liquid replenishment end (321). The liquid supply end (332) is higher than the liquid replenishment end (321).

7. A heat exchange device as claimed in claim 6, wherein The top of the replenishing component (33) is provided with an expansion cap (331), and the expansion cap (331) is provided with a pressure relief valve. The distance between the highest water level of the liquid in the replenishing component (33) and the top wall of the replenishing component (33) is greater than a first value. The top wall of the accommodating cavity (11) is provided with a detachable cover plate (16) corresponding to the expansion cap (331).

8. A heat exchange device as claimed in claim 3, wherein The liquid inlet ends of each heat exchange section (21) are connected in parallel, and the liquid outlet ends of each heat exchange section (21) are connected in parallel.

9. A heat exchange device as claimed in claim 3, wherein The two heat exchange sections (21) of each heat exchange unit (20) are connected in series. The liquid inlet of one heat exchange section (21) forms the liquid inlet of the heat exchange unit (20), and the liquid outlet of the other heat exchange section (21) forms the liquid outlet of the heat exchange unit (20). The liquid inlets of each heat exchange unit (20) are connected in parallel through the coolant pipe (32), and the liquid outlets are connected in parallel through the coolant pipe (32).

10. An electrical cabinet, characterized in that It includes a cabinet and a heat exchange device as described in any one of claims 1-9.

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