Frequency converter and power regulation equipment

Abstract

The utility model provides a frequency converter and power regulation equipment. The frequency converter comprises a sealed cabinet, a heat exchanger, a fan unit and a plurality of power units. The sealed cabinet comprises a first chamber and a second chamber; the plurality of power units are located in the first cavity, and a ventilation gap exists between every two adjacent power units; the fan unit is located in the second cavity, and at least part of the heat exchanger is located in the second cavity; a common cavity wall, a first ventilation opening and a second ventilation opening are formed between the first cavity and the second cavity, and the first ventilation opening and the second ventilation opening are located on the two opposite sides of the common cavity wall respectively; an air outlet of the fan unit is communicated with the first ventilation opening, the first ventilation opening is communicated with the second ventilation opening, the second ventilation opening is communicated with an air inlet of the heat exchanger, and an air outlet of the heat exchanger is communicated with an air inlet of the fan unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to a frequency converter and power conditioning equipment. BACKGROUND

[0002] At present, the frequency converter usually uses an external circulation air cooling mode to cool, the hot air generated by the power unit in the frequency converter due to heat is discharged to the outside of the frequency converter through a fan, and the low-temperature air outside the frequency converter enters the frequency converter through an air inlet of the frequency converter, so as to cool the power unit. However, the low-temperature air outside the frequency converter may contain dust, water vapor or other pollutants, which may cause dust accumulation or corrosion of electronic devices in the frequency converter after entering the frequency converter, thereby affecting the performance of the frequency converter. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a frequency converter which can isolate external air through a sealed cabinet and avoid air exchange with the external environment on the basis of cooling the power unit, so as to avoid the circulation of external air into the sealed cabinet and keep the performance of the frequency converter stable for a long time.

[0004] The present application provides a frequency converter, which comprises a sealed cabinet, a heat exchanger, a fan unit and a plurality of power units; the sealed cabinet comprises a first chamber and a second chamber; the plurality of power units are located in the first chamber, and there is a ventilation gap between adjacent two power units; the fan unit is located in the second chamber, and at least part of the heat exchanger is located in the second chamber; a shared chamber wall, a first ventilation opening and a second ventilation opening are arranged between the first chamber and the second chamber, wherein the first ventilation opening and the second ventilation opening are located on opposite sides of the shared chamber wall respectively; an air outlet of the fan unit is in communication with the first ventilation opening, the first ventilation opening is in communication with the second ventilation opening through the first chamber, the second ventilation opening is in communication with an air inlet of the heat exchanger, and an air outlet of the heat exchanger is in communication with an air inlet of the fan unit.

[0005] In some optional embodiments, a mounting bracket is arranged in the first chamber, and the plurality of power units are mounted on the mounting bracket to form a power unit array.

[0006] The second ventilation opening is located on a first side of the power unit array, a wind guide channel is arranged in the first chamber, a first end of the wind guide channel is in communication with the first ventilation opening, a second end of the wind guide channel is located on a second side of the power unit array, and the second side of the power unit array is opposite to the first side of the power unit array.

[0007] In some optional embodiments, a predetermined spacing is spaced between the common cavity wall and the power unit array to form an airflow buffer space between the common cavity wall and the power unit array.

[0008] In some optional embodiments, the heat exchanger includes an end cap, a heat exchange pipe, and heat exchange plates. The end cap is connected to the heat exchange pipe, and the heat exchange pipe is connected to the heat exchange plates. The heat exchange pipe and the heat exchange plates are located in the second chamber. The end cap is provided with an inlet and an outlet located outside the sealed cabinet, and the inlet and outlet are respectively connected to the heat exchange pipe.

[0009] In some alternative embodiments, the end cap is located outside the sealed cabinet, and the outer shell of the sealed cabinet has an installation port, through which the heat exchange pipe is connected to the end cap.

[0010] In some alternative embodiments, the heat exchanger is detachably connected to the sealed cabinet via the end cap.

[0011] In some optional embodiments, the outer shell of the sealed cabinet is provided with an access door, one side of which is hinged to the outer shell; and a first sealing strip is provided on the side of the access door facing the inside of the sealed cabinet, through which the access door is sealed to the outer shell.

[0012] In some alternative embodiments, the housing comprises multiple housing segments, which are fixed to the cabinet frame within the sealed cabinet by fasteners, the gap between two adjacent housing segments is sealed by a second sealing strip, and the spacing between the fasteners is less than 200 mm.

[0013] In some alternative embodiments, the second chamber is provided with a plurality of fan units, and each fan unit is provided with an openable ventilation window at its air inlet.

[0014] In some alternative embodiments, the frequency converter includes a first support frame and a second support frame connected to the cabinet frame of the sealed cabinet; the first support frame is connected to the fan unit, and the second support frame holds the at least portion of the heat exchanger.

[0015] This application also provides a power regulation device, including a transformer and a frequency converter as described in any of the above embodiments, wherein the transformer and the frequency converter are connected together.

[0016] In this embodiment, the frequency converter includes a sealed cabinet, a heat exchanger, a fan unit, and multiple power units. The sealed cabinet includes a first chamber and a second chamber. The multiple power units are located in the first chamber, with ventilation gaps between adjacent power units. The fan unit is located in the second chamber, and at least a portion of the heat exchanger is located in the second chamber. A common cavity wall, a first vent, and a second vent are provided between the first and second chambers, located on opposite sides of the common cavity wall. The air outlet of the fan unit communicates with the first vent, which in turn communicates with the second vent through the first chamber. The second vent communicates with the air inlet of the heat exchanger, and the air outlet of the heat exchanger communicates with the air inlet of the fan unit. Inside the sealed cabinet, driven by the fan unit, airflow sequentially flows through the first chamber, the second vent, the heat exchanger, the fan unit, and the first vent, forming a complete airflow circulation process. In this process, the airflow passes through the ventilation gap in the first chamber, absorbing heat generated by the power unit. The air then carries this heat to the heat exchanger, where it absorbs the heat from the airflow, thus cooling it. The cooled airflow is then transported back to the first chamber by the fan unit to begin the next cycle. This airflow circulation process is isolated from external air by a sealed cabinet. Furthermore, it achieves cooling of the power unit without requiring air exchange with the external environment, preventing external air from entering the sealed cabinet through the airflow circulation. This ensures that the inverter's performance is unaffected by external environmental factors and allows for long-term stable operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an inverter provided in an optional embodiment of this application;

[0018] Figure 2 This is a cross-sectional schematic diagram of a frequency converter provided in an optional embodiment of this application;

[0019] Figure 3 This is a cross-sectional schematic diagram of a frequency converter provided in an optional embodiment of this application;

[0020] Figure 4 This is a cross-sectional schematic diagram of another frequency converter provided in an optional embodiment of this application;

[0021] Figure 5 This is a cross-sectional schematic diagram of another frequency converter provided in an optional embodiment of this application;

[0022] Figure 6 This is a partial structural schematic diagram of a frequency converter provided in an optional embodiment of this application.

[0023] List of reference numerals in the attached diagram:

[0024] 100. Frequency converter; 110. Sealed cabinet; 111. First chamber

[0025] 1110, Air guide plate; 1111, Buffer space; 1112, Outer shell

[0026] 1113, Inspection door; 1114, Hinges; 112, Second chamber

[0027] 113. Shared cavity wall; 114. First ventilation opening; 115. Second ventilation opening

[0028] 120. Heat exchanger; 121. End cap; 1211. Water inlet.

[0029] 1212, Water outlet; 122, Heat exchange fins; 123, Connection hole

[0030] 130. Fan unit; 131. Air inlet of fan unit; 132. Air outlet of fan unit.

[0031] 133. Fan; 134. Fan bracket; 140. Power unit

[0032] 150. Mounting bracket; 161. Cabinet rack; 162. Triangular bracket

[0033] 163. Support plate Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0035] In the description of this application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do 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 a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," "joined," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0036] As mentioned earlier, existing frequency converters typically use external air circulation cooling. A fan exhausts the hot air generated by the power units inside the frequency converter to the outside, while the low-temperature air outside the frequency converter enters through the air inlet to cool the power units. However, the low-temperature air outside the frequency converter may contain dust, water vapor, or other pollutants. This air entering the frequency converter may cause dust accumulation or corrosion of the electronic components inside, affecting the performance of the frequency converter.

[0037] In this embodiment, the frequency converter includes a sealed cabinet, a heat exchanger, a fan unit, and multiple power units. The sealed cabinet includes a first chamber and a second chamber. The multiple power units are located in the first chamber, with ventilation gaps between adjacent power units. The fan unit is located in the second chamber, and at least a portion of the heat exchanger is located in the second chamber. A common cavity wall, a first vent, and a second vent are provided between the first and second chambers, located on opposite sides of the common cavity wall. The air outlet of the fan unit communicates with the first vent, which in turn communicates with the second vent through the first chamber. The second vent communicates with the air inlet of the heat exchanger, and the air outlet of the heat exchanger communicates with the air inlet of the fan unit. Inside the sealed cabinet, driven by the fan unit, airflow sequentially flows through the first chamber, the second vent, the heat exchanger, the fan unit, and the first vent, forming a complete airflow circulation process. In this process, the airflow passes through the ventilation gap in the first chamber, absorbing heat generated by the power unit. The air then carries this heat to the heat exchanger, where it absorbs the heat from the airflow, thus cooling it. The cooled airflow is then transported back to the first chamber by the fan unit to begin the next cycle. This airflow circulation process is isolated from external air by a sealed cabinet. Furthermore, it achieves cooling of the power unit without requiring air exchange with the external environment, preventing external air from entering the sealed cabinet through the airflow circulation. This ensures that the inverter's performance is unaffected by external environmental factors and allows for long-term stable operation.

[0038] The transformer provided in this application example will be described below with reference to the accompanying drawings. It should be noted that the various drawings in this application are only for the purpose of illustration and understanding of this embodiment, and are not intended to limit this application in any way, and are not necessarily drawn to scale.

[0039] like Figures 1-3 As shown in the figure, this application provides a frequency converter 100, including a sealed cabinet 110, a heat exchanger 120, a fan unit 130 and multiple power units 140.

[0040] The sealed enclosure 110 includes a sealed outer shell 1112, thereby forming a sealed chamber within the outer shell 1112. The heat exchanger 120 removes heat from the sealed chamber by circulating water with the outside of the sealed chamber. Alternatively, the heat exchanger 120 can be an electrically driven heat exchanger 120, which, exemplarily, may include temperature control units such as a thermoelectric cooler (TEC) and heating wires. The fan unit 130 may include one or more fans to drive airflow within the heat exchange chamber, forming a circulating airflow. The power unit 140 is the core component of the inverter 100, used to perform rectification, filtering, and inversion functions, and may include a rectifier bridge, capacitor bank, inverter circuit, etc., as detailed in related technologies, and will not be elaborated here.

[0041] The sealed cabinet 110 includes a first chamber 111 and a second chamber 112. Multiple power units 140 are located in the first chamber 111, with ventilation gaps between adjacent power units 140 to allow airflow within the first chamber 111 to pass through these gaps and carry away the heat generated by the power units 140. A fan unit 130 is located in the second chamber 112, and at least a portion of a heat exchanger 120 is located in the second chamber 112; that is, the heat exchanger 120 may be partially or entirely located in the second chamber 112.

[0042] like Figure 2 and Figure 3 As shown, a common cavity wall 113, a first ventilation opening 114, and a second ventilation opening 115 are provided between the first chamber 111 and the second chamber 112. The first ventilation opening 114 and the second ventilation opening 115 are located on opposite sides of the common cavity wall 113. The opposite sides of the common cavity wall 113 can be a first side and a second side. The first ventilation opening 114 is located on the first side of the common cavity wall 113, and the second ventilation opening 115 is located on the second side of the common cavity wall 113. For example, as... Figure 3 As shown, the first and second sides of the common cavity wall 113 can be the upper and lower sides, respectively. The first vent 114 is an opening on the upper side of the common cavity wall 113, and the second vent 115 is an opening on the lower side of the common cavity wall 113. It should be understood that the first vent 114 and the second vent 115 can be located directly on the common cavity wall 113, or they can be located outside the common cavity wall 113 and adjacent to its side.

[0043] The air outlet 132 of the fan unit 130 is connected to the first vent 114. The first vent 114 is connected to the second vent 115 through the first chamber 111. The second vent 115 is connected to the air inlet of the heat exchanger 120. The air outlet of the heat exchanger 120 is connected to the air inlet 131 of the fan unit 130. That is, the air outlet 132, the first vent 114, the second vent 115, the air inlet of the heat exchanger 120, the air outlet of the heat exchanger 120, and the air inlet 131 of the fan unit 130 can be connected in sequence to form an airflow channel passing through the fan unit 130, the second chamber 112, and the heat exchanger 120.

[0044] It should be understood that the connection in the embodiments of this application can be a direct connection or an indirect connection. For example, it can be indirectly connected through the indoor space within the first chamber 111 or the second chamber 112, or indirectly connected through a dedicated connection channel or connection pipe. Unless otherwise specified, the embodiments of this application do not limit the specific method of connection. In some optional embodiments, the air outlet 132 of the fan unit 130 is connected to the first vent 114 through the chamber space of the second chamber 112, the first vent 114 is connected to the second vent 115 through the chamber space of the second chamber 112, the second vent 115 is directly connected to the air inlet of the heat exchanger 120, and a connection channel is provided between the air outlet of the heat exchanger 120 and the air inlet 131 of the fan unit 130. The air outlet of the heat exchanger 120 is connected to the air inlet 131 of the fan unit 130 through this connection channel.

[0045] like Figures 2-4 As shown, in some optional embodiments, a mounting bracket 150 is provided in the first chamber 111, and multiple power units 140 are mounted on the mounting bracket 150 to form a power unit 140 array. A second vent 115 is located on the first side of the power unit 140 array. An air guide channel is provided in the first chamber 111, with the first end of the air guide channel communicating with the first vent, and the second end of the air guide channel located on the second side of the power unit 140 array, opposite to the first side of the power unit 140 array.

[0046] The power unit array 140 may include multiple layers of power units 140, and each layer of power units 140 may include multiple power units 140. The overall shape of the power unit array 140 may be a cuboid or other suitable shape. Figure 4 As shown, a guide plate 1110 may be provided in the first chamber 111. The guide plate 1110 and the outer shell 1112 outside the first chamber 111 form the above-mentioned air guiding channel, thereby guiding the airflow from the first vent 114 into the second chamber 112 to the second side of the power unit 140 array.

[0047] In this embodiment of the application, a mounting bracket 150 is provided in the first chamber 111, and multiple power units 140 are mounted on the mounting bracket 150 to form a power unit 140 array. The second vent 115 is located on the first side of the power unit 140 array. A guide channel is provided in the first chamber 111. The first end of the guide channel is connected to the first vent, and the second end of the guide channel is located on the second side of the power unit 140 array. Thus, the cold airflow input into the second chamber 112 through the first vent 114 can be received through the guide channel and transmitted to the second side of the power unit 140 array from the second end of the guide channel. This forces the cold airflow to flow evenly along the arrangement direction of the power units 140 on the first side of the power unit 140 array where the second vent 115 is located. Since the first side of the power unit 140 array where the second vent 115 is located is opposite to the second side, the cold airflow can pass through the entire power unit 140 array from the second side to the first side of the power unit 140 array. This can reduce the "dead zones" in the power unit 140 array where the cold airflow has not flowed and improve the heat exchange efficiency between the cold airflow and the power unit 140.

[0048] It should be understood that the aforementioned hot airflow refers to the airflow formed after the cold airflow absorbs the heat generated by the power unit 140 array. The hot airflow and the cold airflow can be a circulating airflow. The two names are used to distinguish the state of the airflow absorbing heat and after being cooled.

[0049] like Figure 2 or Figure 4 As shown, in some optional embodiments, a preset distance is spaced between the common cavity wall 113 and the power unit 140 array to form an airflow buffer space 1111 between the common cavity wall 113 and the power unit 140 array. This preset distance can be greater than a predetermined threshold to prevent the airflow buffer space 1111 from losing its function. For example, the value of the predetermined threshold can be 15cm, 20cm, or 25cm, etc., and can be determined based on the experience of those skilled in the art or through comparative experiments using different predetermined thresholds.

[0050] By setting a preset distance between the common cavity wall 113 and the power unit 140 array, an airflow buffer space 1111 can be formed between the common cavity wall 113 and the power unit 140 array. This prevents the common cavity wall 113 from blocking the airflow to the first side of the power unit 140 array, so that the cold airflow can pass through the power unit 140 array evenly, further reducing the "dead corners" in the power unit 140 array that have not been traversed by the cold airflow.

[0051] In this embodiment of the application, the frequency converter 100 includes a sealed cabinet 110, a heat exchanger 120, a fan unit 130, and a plurality of power units 140. The sealed cabinet 110 includes a first chamber 111 and a second chamber 112. The plurality of power units 140 are located in the first chamber 111, and there is a ventilation gap between two adjacent power units 140. The fan unit 130 is located in the second chamber 112, and at least a portion of the heat exchanger 120 is located in the second chamber 112. A common cavity wall 113, a first vent 114, and a second vent 115 are provided between the first chamber 111 and the second chamber 112. The first vent 114 and the second vent 115 are located on opposite sides of the common cavity wall 113. The air outlet 132 of the fan unit 130 is connected to the first vent 114, the first vent 114 is connected to the second vent 115 through the first chamber 111, the second vent 115 is connected to the air inlet of the heat exchanger 120, and the air outlet of the heat exchanger 120 is connected to the air inlet 131 of the fan unit 130. Inside the sealed cabinet 110, driven by the fan unit 130, the airflow sequentially flows through the first chamber 111, the second vent 115, the heat exchanger 120, the fan unit 130, and the first vent 114, forming a complete airflow circulation process. In this process, the airflow passes through the ventilation gap in the first chamber 111, absorbing heat generated by the power unit 140. The airflow then carries this heat to the heat exchanger 120, where it absorbs the heat from the airflow, thus cooling it. The cooled airflow is then transported back to the first chamber 111 via the fan unit 130 to begin the next cycle. This airflow circulation process is isolated from external air by the sealed cabinet 110. Furthermore, it achieves cooling of the power unit 140 without requiring air exchange with the external environment. This prevents external air from entering the sealed cabinet 110 through the airflow circulation, ensuring the inverter 100 operates stably and for a long time without being affected by external environmental factors.

[0052] like Figure 2 and Figure 5 As shown, in some optional embodiments, the heat exchanger 120 includes an end cap 121, heat exchange pipes (not shown), and heat exchange plates 122. The end cap 121 is connected to the heat exchange pipes, and the heat exchange pipes are connected to the heat exchange plates 122. There can be multiple heat exchange pipes and heat exchange plates 122. Each heat exchange pipe can pass vertically through each heat exchange plate 122 through a connection hole 123 on the heat exchange plate 122. The connection hole 123 on the heat exchange plate 122 can be referenced... Figure 2 As shown. The heat exchange pipe can be connected at a position that contacts the heat exchange plate 122. For example, the heat exchange pipe can be connected to the heat exchange plate 122 by expansion joint, or by welding or other suitable methods.

[0053] The heat exchange pipes and heat exchange plates 122 are located inside the second chamber 112. The end cover 121 is equipped with an inlet end 1211 and an outlet end 1212 located outside the sealed cabinet 110, and both the inlet end 1211 and the outlet end 1212 are connected to the heat exchange pipes. The heat exchange pipes may include an inlet pipe and a return pipe. The inlet end 1211 is connected to the inlet pipe, the inlet pipe is connected to the return pipe, and the return pipe is connected to the outlet end 1212, forming a water flow path. The inlet end 1211 and the outlet end 1212 can be connected to an external pipe loop, which may be connected to a water supply device such as a water pump. Specific details regarding the configuration of the pipe loop can be found in relevant technical documents and will not be elaborated here.

[0054] Cold water can be introduced into the heat exchange pipe through the water inlet 1211. The cold water cools the heat exchange pipe and heat exchange fins 122, thereby cooling the hot airflow entering the heat exchanger 120 from the air inlet. This results in cold airflow being output from the air outlet of the heat exchanger 120. In this embodiment, the cooling of the hot airflow is achieved through water cooling, which can significantly reduce the noise generated by the inverter 100 and help maintain the comfort of the environment in which the inverter 100 is located. The fan unit 130 can draw in the cold airflow output from the air outlet of the heat exchanger 120 and deliver the cold airflow to the first vent 114, allowing the cold airflow to enter the first chamber 111 from the first vent 114, thereby cooling the power unit 140 in the first chamber 111.

[0055] In this embodiment, the heat exchanger 120 includes an end cap 121, a heat exchange pipe, and heat exchange plates 122. The end cap 121 is connected to the heat exchange pipe, and the heat exchange pipe is connected to the heat exchange plates 122. The heat exchange pipe and heat exchange plates 122 are located inside the second chamber 112. The end cap 121 is provided with an inlet end 1211 and an outlet end 1212 located outside the sealed cabinet 110, and the inlet end 1211 and the outlet end 1212 are respectively connected to the heat exchange pipe. Cold water can be supplied to the heat exchange pipe inside the second chamber 112 through the inlet end 1211 and the outlet end 1212 outside the sealed cabinet 110. After the hot airflow enters the air inlet of the heat exchanger 120 through the second vent 115 of the first chamber 111, the heat of the hot airflow can be transferred to the cold water flow through the heat exchange pipe and the heat exchange plates 122. The cold water flow carries away the heat of the hot airflow, so that the air outlet of the heat exchanger 120 outputs cold airflow. Since the air outlet of the heat exchanger 120 is connected to the air inlet 131 of the fan unit 130, the fan unit 130 draws in the cold air output from the air outlet of the heat exchanger 120, and then discharges the cold air into the first chamber 111 through the first vent 114 to cool the power unit 140 in the first chamber 111. In addition, the embodiments of this application can also use the cold air entering the fan unit 130 to heat dissipate and protect the motor of the fan, thereby improving the service life of the fan.

[0056] like Figure 1 and Figure 5 As shown, in some optional embodiments, the end cover 121 is located outside the sealed cabinet 110. An installation port is provided on the outer shell 1112 of the sealed cabinet 110, and the heat exchange pipes are connected to the end cover 121 through the installation port. The end cover 121 can be detachably connected to the outer shell 1112 of the sealed cabinet 110 using bolts or other connecting components, facilitating maintenance of the heat exchanger 120 by removing the end cover 121. A sealing strip or sealing ring or other sealing structure can be provided between the end cover 121 and the outer shell 1112 of the sealed cabinet 110, thereby sealing the installation port through the end cover 121 and the provided sealing structure.

[0057] In this embodiment, the end cover 121 is located outside the sealed cabinet 110. The outer shell 1112 of the sealed cabinet 110 has an installation port. The heat exchange pipe is connected to the end cover 121 through the installation port, so that the staff can perform maintenance on the heat exchanger 120 without opening the main body of the cabinet. This can significantly improve the maintenance efficiency of the heat exchanger 120. In addition, the staff can operate directly outside the sealed cabinet 110, avoiding the risk of exposure of the electronic components inside the frequency converter 100, and can greatly reduce the maintenance cost of the heat exchanger 120.

[0058] In some optional embodiments, the heat exchanger 120 is detachably connected to the sealed cabinet 110 via an end cover 121. Optionally, the end cover 121 is detachably connected to the outer shell 1112 of the sealed cabinet 110, and the heat exchanger 120 is detachably connected to the sealed cabinet 110 through this detachable connection. The sealed cabinet 110 may be provided with a bracket for placing the heat exchanger 120, thereby ensuring the stability of the heat exchanger 120 after installation in the sealed cabinet 110. In other optional embodiments, other parts of the heat exchanger 120 can be connected to the bracket for placing the heat exchanger 120 via bolts or other fasteners to improve the stability of the heat exchanger 120.

[0059] In this embodiment, the heat exchanger 120 is detachably connected to the sealed cabinet 110 via an end cover 121. This allows the heat exchanger 120 to be removed from the sealed cabinet 110 after the end cover 121 is removed. This greatly facilitates the installation and removal of the heat exchanger 120 and improves the installation and maintenance efficiency of the heat exchanger 120.

[0060] like Figure 3As shown, in some optional embodiments, an access door 1113 is provided on the outer shell 1112 of the sealed cabinet 110. One side of the access door 1113 is hinged to the outer shell 1112 inside the sealed cabinet 110. For example, the access door 1113 can be hinged to the outer shell 1112 via a hinge 1114. The other sides of the access door 1113 can be bolted to the cabinet frame to facilitate the opening and fixing of the access door 1113. Furthermore, a first sealing strip is provided on the side of the access door 1113 facing the inside of the sealed cabinet 110, and the access door 1113 is sealed to the outer shell 1112 through the first sealing strip.

[0061] The first sealing strip can be made of flexible materials such as rubber or silicone, allowing it to deform and tightly adhere to the sealing door and the outer shell 1112 of the sealing cabinet 110, thus ensuring its sealing effect. The first sealing strip can be installed on the access door 1113 or on the outer shell 1112 of the sealing cabinet 110, as long as the access door 1113 can be sealed through the first sealing strip to the corresponding door opening on the outer shell 1112 of the sealing cabinet 110. The first sealing strip can be arranged around the edge of the access door 1113 to form a closed sealing ring, thus preventing gaps between the sealing strips from affecting their sealing effect.

[0062] In this embodiment, the sealed cabinet 110 further includes an inspection door 1113 disposed on the outer shell 1112. One side of the inspection door 1113 is hinged to the outer shell 1112 of the sealed cabinet 110, allowing the inspection door 1113 to rotate and open along a fixed axis. This allows personnel to expose the internal equipment without completely disassembling the door when opening the inspection door 1113, significantly reducing the time required to operate the inspection door 1113. A first sealing strip is provided on the side of the inspection door 1113 facing the inside of the sealed cabinet 110. The inspection door 1113 is sealed to the outer shell 1112 through the first sealing strip, ensuring a tight fit between the inspection door 1113 and the outer shell 1112 of the sealed cabinet 110. This seals the gap between the inspection door 1113 and the outer shell 1112 of the sealed cabinet 110, preventing dust or water vapor from entering the sealed cabinet 110 through the gap between the inspection door 1113 and the outer shell 1112 of the sealed cabinet 110.

[0063] like Figure 3 As shown, in some optional embodiments, the housing 1112 includes multiple housing segments, which are fixed to the cabinet frame inside the sealed cabinet 110 by fasteners. The fasteners can be detachable fasteners such as bolts or non-detachable fasteners such as anchors. The gap between two adjacent housing segments is sealed by a second sealing strip, and the spacing between the fasteners is less than 200mm.

[0064] The second sealing strip can be made of flexible materials such as rubber or silicone, so that the second sealing strip can fit tightly against the shell segment through the deformation of the flexible material, thereby ensuring the sealing effect of the second sealing strip. By setting the distance between the first sealing strip, the second sealing strip, and the fixing member to be less than 200mm, the sealing rating of the sealed cabinet 110 in this embodiment can reach IP55, which can effectively isolate dust, moisture, and other pollutants from the outside of the sealed cabinet 110 from entering the sealed cabinet 110.

[0065] In this embodiment, the outer shell 1112 of the sealed cabinet 110 comprises multiple shell segments, which can be assembled by splicing to form the outer shell 1112 of the sealed cabinet 110, reducing the manufacturing and installation difficulty of the outer shell 1112. The gap between two adjacent shell segments is sealed by a second sealing strip, and the spacing between the fasteners is less than 200mm. Based on sealing the gap between two adjacent shell segments with the second sealing strip, the dense arrangement of the fasteners with a spacing of less than 200mm increases the stability of the connection between the shell segments and the cabinet, reduces the risk of deformation of the shell segments due to vibration or external impact, and prevents the gap between two adjacent shell segments from widening due to deformation, thereby maintaining the reliability of the seal between the two shell segments.

[0066] In some optional embodiments, a plurality of fan units 130 are provided in the second chamber 112, and each fan unit 130 has an openable ventilation window at its air inlet 131. Exemplarily, the openable ventilation window can be a louver.

[0067] In this embodiment, the airflow force driving the airflow within the sealed cabinet 110 can be adjusted by changing the number of activated fan units 130. Furthermore, when a fan unit 130 is activated, the ventilation window at its inlet / outlet is open, allowing airflow to enter the inlet 131 of that fan unit 130. When a fan unit 130 is deactivated, the ventilation window at its inlet / outlet is closed, preventing airflow from entering the fan unit 130, thus avoiding airflow dispersion and concentrating the airflow towards the inlet 131 of the activated fan unit 130, improving airflow circulation efficiency.

[0068] In some alternative embodiments, the frequency converter 100 includes a first support frame and a second support frame connected to the cabinet frame 161 of the sealed cabinet 110; the first support frame is connected to the fan unit 130, and the second support frame holds at least a portion of the heat exchanger 120. The at least portion of the heat exchanger 120 may be the portion of the heat exchanger 120 located within the second chamber 112.

[0069] likeFigure 6 As shown, the fan unit 130 may include a fan 133 and a fan bracket 134. The fan 133 may be mounted on the fan bracket 134, and the fan bracket 134 may be directly or indirectly connected to the first support frame. The first support frame may include... Figure 2 or Figure 6 The triangular bracket 162 shown is used to enhance the stability of the first support frame. The second support frame may include... Figure 2 or Figure 3 The support plate 163 shown allows the portion of the heat exchanger 120 located within the second chamber 112 to be placed stably via the support plate 163.

[0070] In this embodiment, the frequency converter 100 includes a first support frame and a second support frame connected to the cabinet frame 161 of the sealed cabinet 110; the first support frame is connected to the fan unit 130, and at least a portion of the heat exchanger 120 is placed on the second support frame. The separate arrangement of the first support frame and the second support frame allows the fan unit 130 and the heat exchanger 120 to be modularly and independently installed. When either the fan unit 130 or the heat exchanger 120 needs repair or maintenance, the operation can be completed without disassembling the other, significantly improving the convenience of equipment maintenance.

[0071] This application also provides a power regulation device, including a transformer and a frequency converter as described in any of the preceding embodiments, wherein the transformer and the frequency converter are connected together.

[0072] When power regulating equipment is operating, the transformer can be connected to the power supply, and the frequency converter can be connected to the load equipment (such as motors, water pumps, etc.). As a feasible implementation, the power supply can be alternating current (AC). After the power is turned on, the transformer first reduces the input voltage to a voltage suitable for the frequency converter's operation, serving as a voltage reduction and isolation mechanism to protect the internal electronic components of the frequency converter from damage by high voltage. The frequency converter, through rectification, filtering, and inversion processes, adjusts the AC output from the transformer to an output current that meets the requirements of the load equipment, thereby supplying power to the load equipment. The electronic components in the frequency converter that implement rectification, filtering, and inversion processes can be found in relevant technologies and will not be elaborated upon here.

[0073] The power regulation device provided in this application embodiment is based on the same inventive concept as the aforementioned frequency converter embodiment and can achieve the same effect. For the specific implementation process, please refer to the description in the aforementioned frequency converter embodiment, which will not be repeated here.

[0074] It should be noted that, in this patent application, nouns and pronouns referring to persons are not limited to specific genders. Relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. The term "connection" can be a direct or indirect connection, and this application does not exclude the possibility of other components being connected between two connected components. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0075] Finally, it should be noted that the above are merely preferred embodiments of this application, used only to illustrate the technical solution of this application, and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A frequency converter (100), characterized by The sealed cabinet (110), the heat exchanger (120), the fan unit (130) and a plurality of power units (140) are included. The sealed cabinet (110) includes a first chamber (111) and a second chamber (112); a plurality of the power units (140) are located in the first chamber (111), and there is a ventilation gap between two adjacent power units (140); the fan unit (130) is located in the second chamber (112), and at least part of the heat exchanger (120) is located in the second chamber (112); The first chamber (111) and the second chamber (112) are provided with a shared cavity wall (113), a first ventilation opening (114) and a second ventilation opening (115), wherein the first ventilation opening (114) and the second ventilation opening (115) are located on opposite sides of the shared cavity wall (113) respectively; the air outlet (132) of the fan unit (130) communicates with the first ventilation opening (114), the first ventilation opening (114) communicates with the second ventilation opening (115) through the first chamber, the second ventilation opening (115) communicates with the air inlet of the heat exchanger (120), and the air outlet of the heat exchanger (120) communicates with the air inlet (131) of the fan unit (130).

2. The frequency converter (100) according to claim 1, characterized in that The first chamber (111) is provided with a mounting bracket (150), and a plurality of the power units (140) are installed on the mounting bracket (150) to form a power unit (140) array; The second ventilation opening (115) is located on a first side of the power unit (140) array, and the first chamber (111) is provided with an air guide channel, a first end of the air guide channel communicates with the first ventilation opening, and a second end of the air guide channel is located on a second side of the power unit (140) array, which is opposite to the first side of the power unit (140) array.

3. The frequency converter (100) according to claim 2, characterized in that The shared cavity wall (113) and the power unit (140) array are spaced apart by a preset distance to form an air flow buffer space (1111) between the shared cavity wall (113) and the power unit (140) array.

4. The frequency converter (100) according to claim 1, characterized in that The heat exchanger (120) includes an end cover (121), a heat exchange pipeline and a heat exchange fin (122), the end cover (121) is connected with the heat exchange pipeline, and the heat exchange pipeline is connected with the heat exchange fin (122); The heat exchange pipeline and the heat exchange fin (122) are located in the second chamber (112), the end cover (121) is provided with a water inlet end (1211) and a water outlet end (1212) located outside the sealed cabinet (110), and the water inlet end (1211) and the water outlet end (1212) respectively communicate with the heat exchange pipeline.

5. The frequency converter (100) according to claim 4, characterized in that, The end cover (121) is located outside the sealed cabinet (110), an installation opening is formed on the shell (1112) of the sealed cabinet (110), and the heat exchange pipeline is connected with the end cover (121) through the installation opening.

6. The frequency converter (100) according to claim 5, characterized in that The heat exchanger (120) is detachably connected with the sealed cabinet (110) through the end cover (121).

7. The frequency converter (100) according to claim 1, characterized by The sealed cabinet (110) is provided with an access door (1113) on the shell (1112), one side of the access door (1113) is hinged to the shell (1112), and the side of the access door (1113) facing the inside of the sealed cabinet (110) is provided with a first sealing strip, and the access door (1113) is sealingly matched with the shell (1112) through the first sealing strip.

8. The frequency converter (100) according to claim 7, characterized by The shell (1112) comprises a plurality of shell segments, the shell segments are fixed on the cabinet frame in the sealed cabinet (110) through fixing members, the gap between adjacent two shell segments is sealed through a second sealing strip, and the spacing between the fixing members is less than 200mm.

9. The frequency converter (100) according to claim 1, characterized in that, A plurality of fan units (130) are arranged in the second chamber (112), and each fan unit (130) is provided with an openable and closable ventilation window at the air inlet (131).

10. The frequency converter (100) according to claim 1, characterized in that, The frequency converter (100) comprises a first support frame and a second support frame connected with the cabinet frame (161) of the sealed cabinet (110), the first support frame is connected with the fan unit (130), and the second support frame is placed with the at least part of the heat exchanger (120).

11. A power conditioning device, characterized by A transformer and a frequency converter (100) according to any one of claims 1-10 are included, and the transformer and the frequency converter (100) are connected.

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