Frequency converter power unit and heat dissipation structure thereof
By adopting a combined structure of substrate, heat pipe and radiator in the inverter power unit, the problem of insufficient heat dissipation capability in the prior art is solved, and more efficient heat transfer and heat dissipation effect is achieved, and the service life of the equipment is extended.
Patent Information
- Application Number
- CN202420152573.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-01-22
AI Technical Summary
The thermal dissipation capability of existing inverter power units is insufficient, resulting in a shortened service life.
A heat dissipation structure including substrate, heat pipe and radiator is adopted. One end of the heat pipe is pre-buried inside the substrate and the other end is fixedly connected to the radiator. Heat is transferred by heat pipes with high heat transfer capabilities, and is reinforced by spaced fins and corrugated tube shells. Heat dissipation capability.
It effectively reduces the ambient temperature around the thermally sensitive device, extends the service life of the inverter power unit, and enhances the heat dissipation ability through sintered heat pipes and heat dissipation layers.
Smart Images
Figure CN222235339U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical equipment, and more specifically, to a frequency converter power unit and a heat dissipation structure thereof. Background Art
[0002] A frequency converter is a device used to control the speed and voltage of an electric motor. It is usually used in large motor systems in industrial production. It can accurately control the speed of the motor by changing the frequency and voltage of the motor, thereby achieving energy saving and precise control of the production process.
[0003] Common inverter power units usually use independently packaged rectifier bridges, IGBTs and other power devices to achieve the functions of power unit rectification and inversion. A lot of heat will be generated during use. If the heat dissipation capacity is insufficient, the service life will be shortened. Prior art CN115208168A discloses an inverter, which installs two fin-type heat sinks on the power device to increase the heat dissipation power (see attached) Figure 1 ); CN116131568A also discloses a frequency converter, which, in order to increase the heat dissipation power, uses a fin-type heat sink (see its attached Figure 3 -5).
[0004] It can be seen that the heat dissipation capacity of the existing inverter power unit needs to be improved, and it is necessary for those skilled in the art to develop a heat dissipation structure with strong heat dissipation capacity and relatively small volume for the inverter. Utility Model Content
[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a frequency converter power unit and a heat dissipation structure thereof.
[0006] The above technical objectives of the utility model are achieved through the following technical solutions:
[0007] A heat dissipation structure of a frequency converter power unit comprises: a substrate for adhering to a power device and absorbing heat generated by the power device, a radiator for dissipating the heat generated by the power device into the environment, and a plurality of heat pipes for transferring heat on the substrate to the radiator; the substrate is fixedly connected to the radiator; one end of the heat pipe is pre-buried in the interior of the substrate, and the other end is fixedly connected to the radiator.
[0008] Optionally, the radiator includes: a heat dissipation shell, and a plurality of fins arranged at intervals; the edges of the fins are fixedly connected to the inner wall of the heat dissipation shell; the heat dissipation shell is fixedly connected to the substrate; and a plurality of the fins are all sleeved on the other end of any one of the heat pipes.
[0009] Optionally, the heat dissipation housing includes: a bellows shell, with sealing plates provided at both ends of the bellows shell; the edge of the fin is fixedly connected to the inner wall of the bellows shell, or to the inner side of the sealing plate.
[0010] Optionally, the outer wall of the bellows shell is coated with a heat dissipation layer.
[0011] Optionally, the cross-section of the heat pipe in the heat transfer direction is circular.
[0012] Optionally, the heat pipe is a sintered heat pipe.
[0013] Another object of the utility model is to provide a frequency converter power unit, which includes: the above-mentioned heat dissipation structure.
[0014] Optionally, power devices are bonded and arranged on both sides of the substrate, and the power devices are IGBTs and / or rectifier bridges.
[0015] In summary, the utility model has the following beneficial effects: (1) The heat absorbed by the substrate is transferred to the radiator by using a heat pipe with high heat transfer capacity, and the heat generated by the power device is transferred to the environment in time, thereby reducing the ambient temperature around the heat-sensitive device, thereby extending the service life of the inverter power unit. (2) A plurality of spaced fins are arranged on the cooling end of the heat pipe and transfer the heat to the heat dissipation shell, thereby enhancing the heat dissipation capacity of the radiator, which is beneficial to reducing the ambient temperature around the heat-sensitive device, thereby extending the service life of the inverter power unit. (3) The corrugated tube shell made of corrugated plate further increases the heat dissipation area and enhances the heat dissipation capacity of the radiator to a certain extent. (4) The use of a cylindrical sintered heat pipe and coating the heat dissipation layer on the corrugated tube shell can enhance the heat dissipation capacity of the heat dissipation structure and accelerate the transfer of the heat generated by the power device to the external environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a cross-sectional view of the heat dissipation structure in the utility model;
[0017] Figure 2 It is a side view of the power unit of the frequency converter in the utility model;
[0018] Figure 3 It is a structural schematic diagram of the inverter power unit in the utility model.
[0019] In the figure: 1, substrate; 2, heat sink; 21, heat dissipation shell; 211, bellows shell; 212, sealing plate; 22, fins; 3, heat pipe; 4, power device. DETAILED DESCRIPTION
[0020] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. Several embodiments of the utility model are given in the accompanying drawings. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein.
[0021] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
[0022] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.
[0023] The utility model provides a heat dissipation structure of a frequency converter power unit, such as Figure 1-3 As shown, it includes: a substrate 1 for adhering to a power device 4 and absorbing the heat generated by the power device 4, a radiator 2 for dissipating the heat generated by the power device 4 to the environment, and a plurality of heat pipes 3 for transferring the heat on the substrate 1 to the radiator 2; the substrate 1 is fixedly connected to the radiator 2; one end of the heat pipe 3 is pre-buried in the interior of the substrate 1, and the other end is fixedly connected to the radiator 2.
[0024] In this embodiment, the lower ends of the multiple heat pipes 3 are pre-buried in the substrate 1 by welding, and the upper ends of the multiple heat pipes 3 are plugged and fixed in the radiator 4. Multiple power devices 4 are attached to both sides of the substrate 1. After the substrate 1 absorbs heat, it is transferred from bottom to top to the radiator 4 through the multiple heat pipes 3. The radiator 4 quickly dissipates the heat to the environment (outside the inverter cabinet) under the action of the bottom-up cooling airflow inside the inverter cabinet (multiple inverter power units are installed inside the inverter cabinet).
[0025] The utility model utilizes a heat pipe 3 with high heat transfer capacity to transfer the heat absorbed by the substrate 1 to the radiator 2, and promptly transfers the heat generated by the power device 4 to the environment, thereby reducing the ambient temperature around the heat-sensitive devices (such as capacitors, etc.) installed below the radiator 2, thereby extending the service life of the inverter power unit.
[0026] Furthermore, the radiator 2 includes: a heat dissipation shell 21, and a plurality of fins 22 arranged at intervals; the edges of the fins 22 are fixedly connected to the inner wall of the heat dissipation shell 21; the heat dissipation shell 21 is fixedly connected to the substrate 1; and a plurality of the fins 22 are all sleeved on the other end of any one of the heat pipes 3.
[0027] like Figure 1-3 As shown, the heat dissipation housing 21 and the fins 22 are made of 0.5 mm thick aluminum material, and a plurality of fins 22 are fixed to the inside of the heat dissipation housing 21 at intervals of 5 mm by plugging, welding, or other existing methods. Each fin 22 has a through hole corresponding to the number of heat pipes 3, so that each heat pipe 3 can be plugged into the fin 22 through the through hole. The plurality of through holes on the fin 22 are arranged in a straight line, corresponding to the position of each heat pipe 3 one by one.
[0028] Furthermore, the heat dissipation housing 21 includes: a bellows shell 211 , with sealing plates 212 provided at both ends of the bellows shell 211 ; the edge of the fin 22 is fixedly connected to the inner wall of the bellows shell 211 or to the inner side of the sealing plate 212 .
[0029] The plurality of fins 22 arranged at intervals are sleeved on the cooling end (upper end) of the heat pipe 3 and transfer heat to the heat dissipation housing 21, thereby enhancing the heat dissipation capacity of the radiator 2 and lowering the ambient temperature around the heat sensitive device, thereby extending the service life of the inverter power unit. The fins 22 can be flat sheets or corrugated sheets.
[0030] like Figure 1-3 As shown, the heat dissipation housing 21 is composed of a bellows shell 211 and two sealing plates 212. The bellows shell 211 is tubular as a whole, and is formed by welding the corrugated plates end to end, and the two ends formed by welding are welded to the sealing plates 212. The edges of the fins 22 can be welded to the inner wall of the bellows shell 211, and can also be welded to the inner side of the sealing plate 212.
[0031] The corrugated tube shell 211 made of the corrugated plate further increases the heat dissipation area and enhances the heat dissipation capacity of the radiator 2 to a certain extent.
[0032] Furthermore, the outer wall of the bellows shell 211 is coated with a heat dissipation layer.
[0033] The heat dissipation layer is not shown in the figure, and is obtained by spraying graphene heat dissipation paint on the bellows shell 211 and drying it, or it can be prepared by other heat dissipation paints in the prior art. Coating the heat dissipation layer can enhance the heat dissipation capacity of the bellows shell 211 and accelerate the transfer of heat generated by the power device 4 to the external environment.
[0034] Furthermore, the cross section of the heat pipe 3 in the heat transfer direction is circular.
[0035] Furthermore, the heat pipe 3 is a sintered heat pipe.
[0036] Relatively speaking, the heat transfer power of the cylindrical heat pipe 3 is higher than that of the flat heat pipe 3, because the cross-sectional area of the steam channel of the cylindrical heat pipe 3 is larger than that of the flat heat pipe 3. In addition, the powder core made by the powder sintering process provides a greater capillary force than the grooved core, that is, under the same volume (internal space of the substrate 1), the cylindrical sintered heat pipe can provide a greater heat transfer power, which is conducive to accelerating the transfer of heat generated by the power device 4 to the external environment.
[0037] A frequency converter power unit adopts the above heat dissipation structure to dissipate heat from a power device 4, where the power device 4 refers to a high-power heat-generating electronic device, such as an IGBT, a rectifier bridge, etc.
[0038] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. A heat dissipation structure of a frequency converter power unit, characterized in that: include: A substrate for bonding with a power device and absorbing the heat generated by the power device, a radiator for dissipating the heat generated by the power device to the environment, and a plurality of heat pipes for transferring the heat on the substrate to the radiator; the substrate is fixedly connected to the radiator; one end of the heat pipe is pre-buried in the interior of the substrate, and the other end is fixedly connected to the radiator.
2. The heat dissipation structure of the inverter power unit according to claim 1, characterized in that: The radiator comprises: a heat dissipation shell, and a plurality of fins arranged at intervals; the edges of the fins are fixedly connected to the inner wall of the heat dissipation shell; the heat dissipation shell is fixedly connected to the substrate; and a plurality of the fins are all sleeved on the other end of any one of the heat pipes.
3. The heat dissipation structure of the inverter power unit according to claim 2, characterized in that: The heat dissipation housing comprises: a bellows shell, and sealing plates are arranged at both ends of the bellows shell; the edge of the fin is fixedly connected to the inner wall of the bellows shell, or to the inner side of the sealing plate.
4. The heat dissipation structure of the inverter power unit according to claim 3, characterized in that: The outer wall of the bellows shell is coated with a heat dissipation layer.
5. The heat dissipation structure of the inverter power unit according to claim 3, characterized in that: The cross section of the heat pipe in the heat transfer direction is circular.
6. The heat dissipation structure of the inverter power unit according to claim 5, characterized in that: The heat pipe is a sintered heat pipe.
7. A frequency converter power unit, characterized in that: include: The heat dissipation structure according to any one of claims 1 to 6.
8. The inverter power unit according to claim 7, characterized in that: Power devices are bonded and arranged on both sides of the substrate, and the power devices are IGBTs and / or rectifier bridges.