Heat dissipation unit and electrical cabinet

Abstract

The invention relates to the field of improvement of cooling and ventilation of electrical equipment, in particular to a heat dissipation unit and an electrical cabinet. The liquid cooling heat dissipation system is used for solving the problem that when an existing liquid cooling heat dissipation system works, external dust can fall onto a power element in a cabinet body, and operation of the power element is affected. The heat dissipation unit comprises a bin body which is arranged outside an electrical cabinet body during use, an air inlet and an air outlet are formed in the bin body, a liquid cooling heat dissipation assembly is installed at the position, corresponding to the air outlet, in the bin body, and the liquid cooling heat dissipation assembly comprises a liquid cooling heat dissipation device and a heat dissipation fan. The liquid cooling radiator is used for being connected with a liquid cooling heat absorption component in the electrical cabinet through a liquid cooling circulation pipeline. When the heat dissipation fan works, external air can be brought into the cabin body outside the cabinet body, cooling of the liquid cooling radiator is realized in the cabin body, and heat dissipation of the power element in the cabinet body is realized through the liquid cooling heat absorption part, so that external impurities cannot enter the cabinet body, the external impurities are prevented from falling onto the power element in the cabinet body, and operation of the power element is ensured.

Description

Technical Field

[0001] The present invention relates to the field of improvement of cooling and ventilation of electrical equipment, and in particular to a heat dissipation unit and an electrical cabinet. Background Art

[0002] Energy storage converters generate heat during operation, and therefore often require a heat dissipation system to dissipate the heat. In the prior art, water-cooled heat dissipation devices are typically used to dissipate the heat. For example, the Chinese utility model with authorization announcement number CN210780514U discloses a water-cooled heat dissipation structure for an inverter, which is installed in a box body of a container, and includes a radiator equipped with a fan and a water-cooled plate installed on a power device. A water-cooling pipe is provided on the water-cooling pipe, and the water inlet and outlet of the radiator are connected to the water-cooling pipe through a circulation pipe. A delivery pump is provided on the circulation pipe to provide power for the circulation of the coolant. The radiator is installed at the rear end of the box body, and a heat exhaust port is provided on the end plate at the rear end of the box body. During operation, the heat generated by the power element will be transferred to the water-cooled plate, and the coolant flowing in the water-cooling pipe will take away the heat of the water-cooled plate. At the same time, the fan blows the air in the box body to the radiator to cool down and dissipate the coolant in the radiator, and send the heat out of the box body through the heat exhaust port. In this way, the temperature of the coolant in the radiator can be quickly reduced so that it can be circulated back to the water-cooled plate to cool the power element. In order to ensure normal heat dissipation, the box should also be equipped with an air inlet. When the fan is working normally, the outside air will be drawn into the box. The power components are located in the box. When the outside air enters the box, external dust or sand will fall onto the power components, affecting the normal operation of the power components. Summary of the Invention

[0003] The purpose of the present invention is to provide a heat dissipation unit for an electrical cabinet to solve the problem that external dust will fall onto the electrical components in the cabinet during operation of the existing liquid cooling heat dissipation system, affecting the normal operation of the electrical components; the purpose of the present invention is also to provide an electrical cabinet to solve the problem that external dust will fall onto the electrical components in the cabinet during operation of the existing liquid cooling heat dissipation system, affecting the normal operation of the electrical components.

[0004] A heat dissipation unit for an electrical cabinet of the present invention includes a bin body which is placed outside the electrical cabinet body when in use, and an air inlet and an air outlet are provided on the bin body. A liquid cooling heat dissipation component is installed inside the bin body at a position corresponding to the air outlet. The liquid cooling heat dissipation component includes a liquid cooling radiator and a heat dissipation fan. The liquid cooling radiator is used to be connected to a liquid cooling heat absorbing component in the electrical cabinet through a liquid cooling circulation pipeline.

[0005] Furthermore, the air outlet is provided with an air guide structure for guiding the airflow of the fan to be blown out obliquely upwards.

[0006] Furthermore, a louver is provided on the side wall of the bin body at the air outlet position facing the fan, the window of the louver constitutes the air outlet, and the window blades of the louver are arranged obliquely upward to constitute the air guide structure.

[0007] Furthermore, the warehouse body has a rectangular structure, the air outlet is arranged on two opposite side walls of the warehouse body, the liquid-cooled heat dissipation components are arranged in pairs, the liquid-cooled radiators of the two liquid-cooled heat dissipation components are connected in series through a circulation pipeline, and the paired liquid-cooled heat dissipation components are respectively fixedly connected to the air outlet of the warehouse body so that the airflow of the two cooling fans is blown out to the opposite sides of the warehouse body.

[0008] Furthermore, a partition is provided in the warehouse between the two liquid-cooling heat dissipation components to separate the two liquid-cooling heat dissipation components into two compartments, and each of the separated compartments is provided with the air inlet.

[0009] Furthermore, two adjacent side walls of the storage body where the air outlet is located are grid panels, the grille openings of the grid panels constitute the air inlet, and the partition divides the grid panel into two parts corresponding to the two compartments.

[0010] Furthermore, the area of the air inlet of each compartment is equal to the area of the air outlet.

[0011] Furthermore, a water receiving trough is provided in the warehouse body at a position corresponding to the lower side of the liquid cooling radiator, and the water receiving trough has a water outlet leading to the outside of the warehouse body to prevent liquid leaked from the liquid cooling radiator or rainwater from accumulating in the warehouse body.

[0012] This invention proposes a novel technical solution, in which a liquid-cooled heat dissipation assembly, including a liquid-cooled radiator and a cooling fan, is installed within a housing. The housing, when in use, is positioned outside the cabinet to form a heat dissipation unit independent of the cabinet. The housing is equipped with air inlets and outlets to ensure the proper operation of the fan. When the cooling fan is operating, it draws outside air into the housing, cooling the liquid-cooled radiator within the housing. This prevents external impurities from entering the cabinet and reaching the power components within, ensuring their proper operation.

[0013] Another aspect of the present invention provides an electrical cabinet, which includes a cabinet body, a liquid-cooled heat-absorbing component is provided in the cabinet body, and a heat dissipation unit is provided outside the cabinet body. The liquid-cooled heat-absorbing component and the liquid-cooled radiator of the heat dissipation unit are connected by a circulation pipeline, and a circulation pump is provided on the circulation pipeline. The heat dissipation unit includes a warehouse body placed outside the cabinet body of the electrical cabinet when in use, and an air inlet and an air outlet are provided on the warehouse body. A liquid-cooled heat dissipation component is installed in the warehouse body at a position corresponding to the air outlet. The liquid-cooled heat dissipation component includes a liquid-cooled radiator and a heat dissipation fan. The liquid-cooled radiator is used to be connected to the liquid-cooled heat-absorbing component in the electrical cabinet through a liquid-cooled circulation pipeline.

[0014] Furthermore, the air outlet is provided with an air guide structure for guiding the airflow of the fan to be blown out obliquely upwards.

[0015] Furthermore, a louver is provided on the side wall of the bin body at the air outlet position facing the fan, the window of the louver constitutes the air outlet, and the window blades of the louver are arranged obliquely upward to constitute the air guide structure.

[0016] Furthermore, the warehouse body has a rectangular structure, the air outlet is arranged on two opposite side walls of the warehouse body, the liquid-cooled heat dissipation components are arranged in pairs, the liquid-cooled radiators of the two liquid-cooled heat dissipation components are connected in series through a circulation pipeline, and the paired liquid-cooled heat dissipation components are respectively fixedly connected to the air outlet of the warehouse body so that the airflow of the two cooling fans is blown out to the opposite sides of the warehouse body.

[0017] Furthermore, a partition is provided in the warehouse between the two liquid-cooling heat dissipation components to separate the two liquid-cooling heat dissipation components into two compartments, and each of the separated compartments is provided with the air inlet.

[0018] Furthermore, two adjacent side walls of the storage body where the air outlet is located are grid panels, the grille openings of the grid panels constitute the air inlet, and the partition divides the grid panel into two parts corresponding to the two compartments.

[0019] Furthermore, the area of the air inlet of each compartment is equal to the area of the air outlet.

[0020] Furthermore, a water receiving trough is provided in the warehouse body at a position corresponding to the lower side of the liquid cooling radiator, and the water receiving trough has a water outlet leading to the outside of the warehouse body to prevent liquid leaked from the liquid cooling radiator or rainwater from accumulating in the warehouse body.

[0021] Furthermore, the electrical cabinet is an energy storage converter cabinet, power elements are arranged in the cabinet, the heat dissipation unit is arranged on the top of the electrical cabinet, and the liquid cooling heat absorption component is used to dissipate heat from the power elements.

[0022] This invention proposes a novel technical solution, in which a liquid-cooled heat dissipation assembly, including a liquid-cooled radiator and a cooling fan, is installed within a housing. The housing, when in use, is placed outside the cabinet to form a heat dissipation unit independent of the cabinet. The housing is equipped with an air inlet and outlet to ensure the proper operation of the fan. When the cooling fan is operating, it draws outside air into the housing, cooling the liquid-cooled radiator within the housing. The power components within the cabinet dissipate heat through the liquid-cooled heat-absorbing components. This prevents external impurities from entering the cabinet, preventing them from reaching the power components within, thus ensuring their proper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a heat dissipation unit of the present invention connected to a liquid-cooled heat absorption component through a circulation pipeline; Figure 2 This is a schematic structural diagram of a heat dissipation unit of the present invention; Figure 3 for Figure 2 Schematic diagram of the internal structure from a top-down perspective; Figure 4 Schematic diagram of the airflow direction of the heat dissipation unit; Figure 5 This is a structural diagram of an electrical cabinet of the present invention; Figure 6 is a side view of a second embodiment of a heat dissipation unit; Figure 7 for Figure 6 A top view of Figure 8 It is a structural diagram of the warehouse body supporting member; Figure 9 It is a top view of the warehouse support member.

[0024] In the figure: 1. Heat dissipation unit; 11. Bin body; 111. Shutter; 112. Grid panel; 12. Liquid cooling radiator; 13. Cooling fan; 14. Partition; 2. Water-cooling plate; 3. Circulation pump; 4. Circulation pipeline; 41. Distribution pipe A; 42. Distribution pipe B; 43. Water inlet pipeline; 44. Water outlet pipeline; 5. Cabinet; 6. Bin body support; 61. Edge; 62. Drain outlet. DETAILED DESCRIPTION

[0025] The present invention addresses the problems existing in the above-mentioned technical solutions by proposing a pioneering technical solution: a liquid-cooled heat dissipation assembly comprising a liquid-cooled radiator and a cooling fan is installed in a housing. The housing is placed outside the cabinet during use to form a heat dissipation unit independent of the cabinet. The housing is provided with an air inlet and an air outlet to ensure the normal operation of the fan. When the cooling fan is operating, it draws external air into the housing outside the cabinet, cooling the liquid-cooled radiator within the housing. The power components in the cabinet rely on the liquid-cooled heat-absorbing components for heat dissipation. This prevents external impurities from entering the cabinet, preventing them from falling on the power components within the cabinet and ensuring their normal operation.

[0026] According to the above technical concept, the present invention provides an electrical cabinet. In this embodiment, the electrical cabinet is an energy storage converter cabinet. Of course, in other embodiments, the electrical cabinet can also be other electrical cabinets. The energy storage converter cabinet includes a cabinet body 5, in which power elements and liquid cooling heat absorbing components for dissipating heat from the power elements are arranged (i.e., Figure 1 The water cooling plate 2 shown in the figure) is provided with a heat dissipation unit 1 outside the cabinet 5. The heat dissipation unit 1 includes the following Figure 3The silo 11 shown is provided with an air inlet and an air outlet. A liquid cooling heat dissipation component is installed in the silo 11 at the position corresponding to the air outlet. The liquid cooling heat dissipation component includes a liquid cooling radiator 12 and a heat dissipation fan 13. The number and parameter indicators of the heat dissipation fan 13 can be determined according to the heat dissipation power and temperature rise requirements of the energy storage converter. The heat dissipation fan 13 is connected to the control unit of the energy storage converter to realize power supply and control of the heat dissipation fan 13. The control unit controls the operation of the fan 13 according to the liquid temperature. The liquid cooling radiator 12 is used to connect to the liquid cooling heat absorption component in the electrical cabinet through the liquid cooling circulation pipeline 4. As shown Figure 1 As shown, the water-cooled plate 2 and the liquid cooling radiator 12 of the heat dissipation unit 1 are connected via a circulation pipe 4, and a circulation pump 3 is provided on the circulation pipe 4. The water-cooled plate 2 is arranged in groups, as shown in FIG. Figure 1 As shown, the water outlet pipe 44 of the liquid-cooled radiator 12 is connected to a water collection pipe A41, and a water inlet branch pipe is provided on the water collection pipe A41. The water inlet branch pipes are respectively connected to the water inlet of the water-cooled plate 2. The water outlet of the water-cooled plate 2 is connected to the water collection pipe B42 through the water outlet branch pipe. The water collection pipe B42 is connected to the water inlet of the liquid-cooled radiator 12 through the water inlet pipe 43. The water outlet pipe 44, the water collection pipe A41, the water inlet branch pipe, the water collection pipe B42, and the water inlet pipe 43 together constitute the circulation pipe 4.

[0027] During operation, the power components in the cabinet 5 generate heat, and the water-cooled plate 2 is used to dissipate the heat for the power components. At this time, the heat of the power components will be transferred to the liquid in the water-cooled plate 2. The liquid with a higher temperature in the water-cooled plate 2 is pumped out of the cabinet 5 by the action of the circulation pump 3 and enters the liquid-cooled radiator 12 in the warehouse 11 outside the cabinet 5. At this time, the cooling fan 13 on the liquid-cooled radiator 12 draws external air into the warehouse through the air inlet on the warehouse 11 and blows it toward the liquid-cooled radiator 12. Subsequently, the airflow will carry the heat of the liquid-cooled radiator 12 and blow it out of the warehouse through the air outlet on the warehouse 11, thereby cooling the liquid in the liquid-cooled radiator 12. The cooled liquid enters the water-cooled plate 2 in the cabinet 5 through the circulation pipe 4 under the action of the circulation pump 3 to realize the circulation of the coolant. When the cooling fan 13 is working, it will bring external air into the warehouse 11 outside the cabinet 5, and cool the liquid-cooled radiator 12 in the warehouse 11. The power components in the cabinet 5 rely on the liquid-cooled heat-absorbing components to dissipate heat. In this way, external impurities will not enter the cabinet 5, preventing external impurities from falling on the power components in the cabinet 5, thereby ensuring the normal operation of the power components.

[0028] like Figure 5As shown, the heat dissipation unit is set on the top of the cabinet 5, and the heat emitted by the liquid cooling radiator 12 is directly discharged upward, which can prevent heat from accumulating around the cabinet 5 and improve the overall heat dissipation effect. When placed specifically, a bin support 6 is fixedly installed on the top of the cabinet 5, and the bottom plate of the bin 11 is fixedly connected to the top surface of the bin support 6. The specific structure of the bin support 6 is as follows Figure 9 As shown, the overall structure is a U-shaped plate, which is provided with connection holes for connecting to the warehouse support 6 and the cabinet 5. An upward extending edge 61 is provided on one side of its short side, and a connection hole for connecting to the side wall of the warehouse body 11 is provided on the edge 61.

[0029] like Figure 2 As shown, a louver 111 is provided on the side wall of the silo 11 at the air outlet position of the fan 13. The window of the louver 111 constitutes the air outlet. The louvers of the louver 111 are arranged obliquely upward, thereby forming an air guide structure that guides the airflow of the heat dissipation fan 13 to be blown upward. The density of hot air is smaller than that of cold air, so the hot air will flow upward. Figure 4 As shown, due to the existence of the air guide structure, the hot air flow blown out by the heat dissipation fan 13 is directly discharged upward, which can avoid the accumulation of hot air around the heat dissipation unit 1 and ensure the heat dissipation efficiency.

[0030] The bottom of the louver 111 is rotatably connected to the housing 11 via a hinge, and is secured to the housing 11 via fasteners (i.e., bolts). This allows the louver 111 to be tilted downward about its axis of connection to the housing 11, ensuring a secure installation. This provides a degree of flexibility, facilitating maintenance of the liquid-cooled radiator 12 within the housing 11.

[0031] The silo 11 is a rectangular parallelepiped structure, with air outlets disposed on two opposing side walls of the silo 11. The liquid-cooled heat dissipation components are arranged in pairs, with the liquid-cooled radiators 12 of the two liquid-cooled heat dissipation components connected in series via a circulation pipeline 4. The paired liquid-cooled radiator components are respectively fixedly connected to the air outlets of the silo 11 so that the airflow from the two cooling fans 13 is blown toward the opposite sides of the silo 11. The liquid-cooled radiators 12 of this embodiment are fixedly connected to the louvers 111 and completely cover the louvers 111. The paired liquid-cooled radiator components further improve heat dissipation efficiency. Furthermore, the opposite wind directions of the two cooling fans 13 prevent the air intakes of the two cooling fans 13 from interfering with each other, thereby improving the heat dissipation effect.

[0032] A partition 14 is installed between the two liquid-cooled heat sink components within the housing 11, separating them into two compartments. The two adjacent sidewalls of the housing 11, where the air outlet is located, are grid panels 112. This dual-sided air intake increases the air intake area compared to single-sided intake, further enhancing heat dissipation. The grille openings of the grid panels 112 form the air inlet, and the partition 14 divides the grid panels 112 into two sections corresponding to the two compartments. The air inlet area (the area of the grid openings of the grid panels 112) and the air outlet area (the area of the louvers 111) of each compartment are equal, ensuring equal airflow. The partition 14 prevents convection of heat dissipated by the two liquid-cooled heat sinks 12, thereby improving overall heat dissipation efficiency. Furthermore, two separate heat dissipation ducts are formed within the housing 11. The air inlet of each compartment is connected to a corresponding cooling fan 13 to dissipate heat from its respective liquid-cooled heat sink 12.

[0033] The bottom edge of the grid panel 112 is connected to the housing 11 via hinges and fasteners (i.e., bolts). This allows the grid panel 112 to be flipped from top to bottom when maintenance is required, facilitating repairs. A filter is installed on the grid panel 112 to prevent external dust from entering the chamber and affecting the normal operation of the liquid-cooled radiator 12, ensuring a normal operating environment for the cooling unit and extending its service life. The filter mesh size can be adjusted based on the required protection level and air intake volume to effectively block wind and sand ingress.

[0034] The tank body 11 is provided with a water receiving trough at the lower side position corresponding to the liquid cooling radiator 12. The water receiving trough has a water outlet leading to the outside of the tank body 11 to prevent the liquid leaked from the liquid cooling radiator 12 or rainwater from accumulating in the tank body. The setting of the water outlet facilitates the drainage of the accumulated water and prevents the accumulated water from affecting the normal operation of the heat dissipation unit. A groove is provided on the lower edge of the bottom surface of the tank body support member 6 to ensure that there is a certain gap between the bottom surface of the tank body 11 and the top surface of the energy storage converter cabinet 5. The groove is provided with a Figure 8 The drain outlet 62 shown can allow the accumulated water to be discharged from the drain outlet 62 through the flow gap.

[0035] Regarding the placement of the heat dissipation unit and the cabinet, the present invention also provides other embodiments. In another embodiment, the heat dissipation unit can also be placed at the bottom or side of the cabinet. It is only necessary to ensure that external impurities do not enter the cabinet and affect the normal operation of the power components when the heat dissipation fan is working.

[0036] The present invention also provides another embodiment of the air outlet of the heat dissipation unit. In another embodiment, a grille panel is provided on the side wall of the housing corresponding to the location of the liquid cooling radiator, and the grille opening of the grille panel constitutes the air outlet. In this case, an upwardly inclined windshield can be provided outside the grille panel, forming the air guide structure to guide the airflow of the fan upward.

[0037] The present invention also provides other embodiments regarding the number of liquid-cooling heat dissipation components. In one embodiment, the liquid-cooling heat dissipation component can also be provided individually and on any side wall of the warehouse body.

[0038] Regarding the arrangement of paired liquid-cooled heat dissipation components, the present invention also provides another embodiment. In another embodiment, the paired liquid-cooled heat dissipation components can be arranged on adjacent side walls of the rectangular warehouse body. At this time, the air inlet can be arranged on other side walls of the rectangular warehouse body, and it is only necessary to ensure the normal operation of the heat dissipation unit.

[0039] The present invention also provides other embodiments regarding the structure of the air inlet. In one embodiment, the air inlet may be composed of a window of a shutter; in another embodiment, the air inlet may be a hollow structure provided on the side wall of the warehouse body, and it is only necessary to ensure that external air can enter the warehouse body through the air inlet.

[0040] Regarding the area of the air inlet and the area of the air outlet of each compartment, the present invention also provides other embodiments. In one embodiment, the area of the air inlet may be smaller than the area of the air outlet; in another embodiment, the area of the air inlet may also be larger than the area of the air outlet.

[0041] like Figure 6 and Figure 7 As shown, the present invention also provides another embodiment of the heat dissipation unit. In this embodiment, two groups of liquid-cooled heat dissipation components are provided in the bin body to improve the heat dissipation effect.

[0042] Another aspect of the present invention further provides a heat dissipation unit. Since the heat dissipation unit is the same as the above-mentioned embodiment of the heat dissipation unit, it will not be described in detail here.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A heat dissipation unit for an electrical cabinet, characterized in that: It includes a warehouse body that is placed outside the electrical cabinet when in use, and is provided with an air inlet and an air outlet. A liquid cooling heat dissipation component is installed inside the warehouse body corresponding to the air outlet. The liquid cooling heat dissipation component includes a liquid cooling radiator and a cooling fan. The liquid cooling radiator is used to be connected to the liquid cooling heat absorption component in the electrical cabinet through a liquid cooling circulation pipeline.

2. The heat dissipation unit for an electrical cabinet according to claim 1, characterized in that: The air outlet is provided with an air guide structure for guiding the air flow of the fan to be blown obliquely upward.

3. The heat dissipation unit for an electrical cabinet according to claim 2, characterized in that: A louver is provided on the side wall of the bin body at the air outlet position facing the fan, the window of the louver constitutes the air outlet, and the window blades of the louver are arranged obliquely upward to form the air guide structure.

4. The heat dissipation unit for an electrical cabinet according to any one of claims 1 to 3, characterized in that: The warehouse body has a rectangular structure, and the air outlet is arranged on two opposite side walls of the warehouse body. The liquid-cooled heat dissipation components are arranged in pairs, and the liquid-cooled radiators of the two liquid-cooled heat dissipation components are connected in series through a circulation pipeline. The paired liquid-cooled heat dissipation components are respectively fixedly connected to the air outlet of the warehouse body so that the airflow of the two cooling fans is blown out to the opposite sides of the warehouse body.

5. The heat dissipation unit for an electrical cabinet according to claim 4, characterized in that: A partition is provided in the warehouse body between the two liquid-cooling heat dissipation components to separate the two liquid-cooling heat dissipation components into two compartments, and each of the separated compartments is provided with the air inlet.

6. The heat dissipation unit for an electrical cabinet according to claim 5, characterized in that: The two adjacent side walls of the side wall where the air outlet of the warehouse is located are grid panels, the grille openings of the grid panels constitute the air inlet, and the partition divides the grid panel into two parts corresponding to the two compartments.

7. The heat dissipation unit for an electrical cabinet according to claim 5 or 6, characterized in that: The area of the air inlet of each compartment is equal to the area of the air outlet.

8. The heat dissipation unit for an electrical cabinet according to any one of claims 1 to 3, characterized in that: A water receiving trough is provided in the warehouse body at a position corresponding to the lower side of the liquid cooling radiator. The water receiving trough has a water outlet leading to the outside of the warehouse body to prevent liquid leaked from the liquid cooling radiator or rainwater from accumulating in the warehouse body.

9. An electrical cabinet, characterized in that: It includes a cabinet body, a liquid-cooled heat-absorbing component is provided inside the cabinet body, a heat dissipation unit is provided outside the cabinet body, the liquid-cooled heat-absorbing component and the liquid-cooled radiator of the heat dissipation unit are connected by a circulation pipeline, and a circulation pump is provided on the circulation pipeline. The heat dissipation unit is a heat dissipation unit for an electrical cabinet as described in any one of claims 1 to 8.

10. The electrical cabinet according to claim 9, characterized in that: The electrical cabinet is an energy storage converter cabinet, in which power components are arranged. The heat dissipation unit is arranged on the top of the electrical cabinet, and the liquid cooling heat absorption component is used to dissipate heat from the power components.

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