Inverter
By rationally arranging power modules, switching components, and heat exchangers in the inverter, and equipping it with bus capacitors and a fan system, the problems of loose inverter structure and low power density are solved, achieving a compact and efficient power electronic equipment design.
Patent Information
- Application Number
- CN202423054572.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing inverters have a loose structure, large overall size, and low power density, which cannot meet the requirements of high power ratings and compact designs.
The power module in the inverter is located in the front half of the enclosure, the AC switch assembly is located directly below the power module, the DC switch assembly is located directly behind the power module, the heat exchanger is located between the two, and it is equipped with a multi-layer bus capacitor and fan system to optimize space utilization and heat dissipation.
This design achieves a compact and high-power-density inverter, improving space utilization and heat dissipation efficiency, and ensuring circuit stability and power quality.
Smart Images
Figure CN223872185U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power electronics technology, and in particular to an inverter. Background Technology
[0002] With the rapid development of industry, large-scale power electronic equipment is being used more and more widely in various industries. The requirements for inverter power rating and power density are getting higher and higher, and at the same time, the requirements for inverter structural compactness and assembly efficiency are also getting higher and higher. However, the existing inverter structure is relatively loose, the overall size is large, the power density is low, and the structure is not compact, which cannot meet the needs of use.
[0003] Therefore, there is an urgent need to develop an inverter with a compact structure and high power density. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an inverter with a compact structure and high power density, thereby solving the aforementioned technical problems.
[0005] An inverter includes: a housing, a heat exchanger disposed within the housing, a power module, a DC switch assembly and an AC switch assembly electrically connected to the power module, the power module being disposed in the front half of the housing, the AC switch assembly being disposed directly below the power module within the housing, the DC switch assembly being disposed directly behind the power module within the housing, and the heat exchanger being disposed between the power module and the DC switch assembly.
[0006] Preferably, the inverter is further provided with a first bus capacitor, which is disposed above the power module, the heat exchanger and the DC switching assembly in the housing, and the two ends of the first bus capacitor are electrically connected to the DC switching assembly and the power module respectively.
[0007] Preferably, a first fan is provided behind or in front of the first bus capacitor of the aforementioned enclosure.
[0008] Preferably, a second fan is also provided inside the aforementioned housing, and the second fan is positioned directly above the heat exchanger.
[0009] Preferably, an air duct baffle is provided below the first bus capacitor and the first fan of the aforementioned enclosure, and above the power module and the DC switch assembly.
[0010] In another preferred embodiment, a second bus capacitor is also provided inside the aforementioned housing. The second bus capacitor is located between the power module and the DC switch assembly, and is situated above the heat exchanger. The two ends of the second bus capacitor are electrically connected to the DC switch assembly and the power module, respectively.
[0011] Preferably, a third fan is also provided inside the aforementioned housing, and the third fan is located between the second bus capacitor and the heat exchanger.
[0012] Preferably, the inverter is further provided with a magnetic element, which is located directly below the heat exchanger inside the housing and behind the AC switch assembly. The two ends of the magnetic element are electrically connected to the AC switch assembly and the power module, respectively.
[0013] Preferably, the magnetic element is an inductor or a transformer.
[0014] Compared with the prior art, this utility model has the following advantages: The power module of the inverter's heat exchanger is located in the front half of the housing, the AC switch assembly is located directly below the power module inside the housing, and the DC switch assembly is located directly behind the power module inside the housing. This arrangement facilitates the wiring of the DC and AC switch assemblies to the power module, resulting in a compact structure, high power density, and small size. It ensures the shortest power flow path and improves the utilization rate of space inside the housing. Furthermore, this arrangement facilitates external wiring of the DC switch assembly at the rear of the housing and the AC switch assembly at the bottom of the housing. Since the power module generates a large amount of heat, a heat exchanger is placed between the power module and the DC switch assembly. This compact structure effectively dissipates heat from the power module, resulting in good heat dissipation. Attached Figure Description
[0015] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.
[0016] Figure 1 This is a side view structural schematic diagram of the first embodiment of an inverter according to the present invention;
[0017] Figure 2 This is a front view structural diagram of the first embodiment of an inverter according to the present invention;
[0018] Figure 3 This is a rear view structural schematic diagram of the first embodiment of an inverter according to this utility model;
[0019] Figure 4 This is a side view of the structure of a second embodiment of an inverter according to the present invention;
[0020] Figure 5 This is a side view of the third embodiment of an inverter according to the present invention.
[0021] Figure 6This is a front view structural schematic diagram of a third embodiment of an inverter according to this utility model;
[0022] Figure 7 This is a rear view structural diagram of a third embodiment of an inverter according to this utility model. Detailed Implementation
[0023] The present invention will be further described in conjunction with the following embodiments and accompanying drawings:
[0024] An inverter, such as Figures 1 to 7 As shown, it includes: a housing 10, a heat exchanger 11 disposed inside the housing 10, a power module 12, a DC switch assembly 13 and an AC switch assembly 14 electrically connected to the power module 12 respectively. The power module 12 is disposed in the front half of the housing 10, the AC switch assembly 14 is disposed directly below the power module 12 inside the housing 10, the DC switch assembly 13 is disposed directly behind the power module 12 inside the housing 10, and the heat exchanger 11 is disposed between the power module 12 and the DC switch assembly 13.
[0025] Specifically, the direction of external current flow can be determined as needed. For example, external AC power enters from the AC switch assembly 14, is converted into DC power by the power module 12, and finally the DC power is output from the DC switch assembly 13 to supply power to the outside; or, external DC power is input from the DC switch assembly 13, is converted into AC power by the power module 12, and finally the AC power is output from the AC switch assembly 14 to supply power to the outside.
[0026] The DC switch assembly 13 can control the on / off of the DC side connection circuit of the power module 12, and the AC switch assembly 14 can control the on / off of the AC side connection circuit of the power module 12. This ensures that when the DC side circuit or AC side circuit of the power module 12 malfunctions or other situations require power disconnection, the power supply can be cut off in a timely manner through the DC switch assembly 13 or the AC switch assembly 14, thereby protecting the power module 12.
[0027] The power module 12 of the inverter's heat exchanger 11 is located in the front half of the housing 10. The AC switch assembly 14 is located directly below the power module 12 inside the housing 10, and the DC switch assembly 13 is located directly behind the power module 12 inside the housing 10. This arrangement facilitates the wiring of the DC switch assembly 13 and the AC switch assembly 14 to the power module 12, resulting in a compact structure, high power density, and small size. It ensures the shortest power flow path and improves the utilization of space within the housing 10. Furthermore, this arrangement facilitates external wiring of the DC switch assembly 13 at the rear of the housing 10 and the AC switch assembly 14 at the lower end of the housing 10. Since the power module 12 generates a large amount of heat, the heat exchanger 11 is placed between the power module 12 and the DC switch assembly 13. This compact structure effectively dissipates heat from the power module 12, resulting in good heat dissipation.
[0028] As a first embodiment of the inverter of this utility model, such as Figures 1 to 3 As shown, the inverter is also equipped with a first bus capacitor 15, which is located above the power module 12, heat exchanger 11 and DC switch assembly 13 of the housing 10. The two ends of the first bus capacitor 15 are electrically connected to the DC switch assembly 13 and the power module 12, respectively.
[0029] The first bus capacitor 15 can be a bus capacitor of the prior art. The bus capacitor is set between the DC switching assembly 13 and the power module 12. It can store and release charge, thereby smoothing the DC power supply of the inverter and reducing DC power fluctuations to ensure the stability of the output AC power. The bus capacitor can also filter out high-frequency noise, making the DC power supply purer and thus improving the output quality of the inverter. In addition, by absorbing changes in electron flow in the circuit, the bus capacitor can maintain the stability of the circuit and prevent excessive voltage and current, thereby protecting the power module 12 in the inverter.
[0030] The first bus capacitor 15 is located above the power module 12, heat exchanger 11 and DC switch assembly 13 in the housing 10. It has a compact structure, which facilitates the centralized installation and heat dissipation of the first bus capacitor 15. It also facilitates the connection of the first bus capacitor 15 to the DC switch assembly 13 and the power module 12 respectively, and the connection lines are short.
[0031] Better, such as Figure 1 and Figure 3 As shown, a first fan 16 is provided behind or in front of the first bus capacitor 15 of the housing 10. When the first fan 16 is turned on, it can accelerate the air circulation around the first bus capacitor 15, which is beneficial to the heat dissipation of the first bus capacitor 15. The airflow direction can be seen from the arrow in the figure.
[0032] Better, such as Figure 1As shown, a second fan 17 is also provided inside the housing 10, and the second fan 17 is located directly above the heat exchanger 11.
[0033] A second fan 17 is installed directly above the heat exchanger 11. The second fan 17 draws air from bottom to top. The hot air at the bottom is cooled by the heat exchanger 11 and becomes cold air. The cold air then encounters the first bus capacitor 15 located at the top. Some of the cold air flows to both sides of the second fan 17 to dissipate heat for the power module 12, AC switch assembly 14, and DC switch assembly 13, respectively. After absorbing heat from the power module 12, AC switch assembly 14, and DC switch assembly 13, the cold air becomes hot air again. The hot air on both sides is then drawn back to the radiator from the bottom of the heat exchanger 11 for further cooling. This cycle forms a cooling airflow channel, which in turn dissipates heat for the power module 12, AC switch assembly 14, and DC switch assembly 13. Some of the cold air is drawn by the first fan 16 and flows to the first bus capacitor 15 located at the top to dissipate heat for the first bus capacitor 15. After being cooled by the first bus capacitor 15, it flows back to the heat exchanger 11 for further cooling. The inverter of this utility model has a second fan 17 set directly above the heat exchanger 11. The layout is reasonable and the structure is compact. This increases the speed of air circulation inside the housing 10, greatly improves the heat dissipation efficiency of the inverter, and has a good heat dissipation effect.
[0034] As a second embodiment of the inverter of this utility model, such as Figure 4 As shown, an air duct baffle 18 is provided below the first bus capacitor 15 and the first fan 16 of the housing 10 and above the power module 12 and the DC switch assembly 13.
[0035] During heat dissipation, the second fan 17 is turned on, drawing air upwards. The hot air at the bottom is cooled by the heat exchanger 11, becoming cold air. This cold air then flows to both sides of the second fan 17 through the upper air duct baffle 18, dissipating heat for the power module 12, AC switch assembly 14, and DC switch assembly 13 respectively. After absorbing heat from these components, the cold air becomes hot air again. This hot air is then drawn back to the radiator from the bottom of the heat exchanger 11, creating a cooling air duct that further cools the power module 12, AC switch assembly 14, and DC switch assembly 13. Similarly, the air duct baffle 18 allows air to flow to the upper first bus capacitor 15 under the suction of the first fan 16, cooling the first bus capacitor 15. The cooling air circulates around the first bus capacitor 15, further dissipating heat.
[0036] The air duct baffle 18 separates the heat dissipation air ducts of the upper first bus capacitor 15 from those of the lower power module 12, AC switch assembly 14, and DC switch assembly 13. The airflow direction of the air duct is shown by the arrow in the figure. The heat dissipation airflow of the air duct is more concentrated, the airflow speed of the air duct cavity is faster, and the heat dissipation efficiency is higher.
[0037] As a third embodiment of the inverter of this utility model, such as Figures 5 to 7 As shown, a second bus capacitor 19 is also provided inside the housing 10. The second bus capacitor 19 is located between the power module 12 and the DC switch assembly 13, and is located above the heat exchanger 11. The two ends of the second bus capacitor 19 are electrically connected to the DC switch assembly 13 and the power module 12, respectively.
[0038] The second bus capacitor 19 can be a bus capacitor of the prior art. The bus capacitor is set between the DC switching assembly 13 and the power module 12. It can store and release charge, thereby smoothing the DC power supply of the inverter and reducing DC power fluctuations to ensure the stability of the output AC power. The bus capacitor can also filter out high-frequency noise, making the DC power supply purer and thus improving the output quality of the inverter. In addition, by absorbing changes in electron flow in the circuit, the bus capacitor can maintain the stability of the circuit and prevent excessive voltage and current, thereby protecting the power module 12 in the inverter.
[0039] The second bus capacitor 19 is located between the power module 12 and the DC switching assembly 13, and is situated above the heat exchanger 11. This design results in a very compact and reasonable structure, leading to a small overall inverter size and high power density. It facilitates the connection of the second bus capacitor 19 to the power module 12 and the DC switching assembly 13, simplifying wiring, reducing connection length and cost, and shortening the power flow path. Furthermore, the second bus capacitor 19 can directly dissipate heat through the heat exchanger 11, resulting in excellent heat dissipation.
[0040] Better, such as Figure 5 As shown, a third fan 20 is also provided inside the housing 10, and the third fan 20 is located between the second bus capacitor 19 and the heat exchanger 11.
[0041] During heat dissipation, the third fan 20 is turned on, drawing air from bottom to top. The hot air at the bottom is cooled by the heat exchanger 11 and becomes cold air. The cold air continues to flow upwards from the third fan 20, cooling the second bus capacitor 19 located above. After absorbing the heat from the second bus capacitor 19, the cold air flows to both sides under the action of the top plate of the enclosure 10, cooling the power module 12, AC switch assembly 14, and DC switch assembly 13 respectively. After absorbing the heat from the power module 12, AC switch assembly 14, and DC switch assembly 13, the cold air becomes hot air. The hot air on both sides is then drawn back to the radiator from the bottom of the heat exchanger 11 for cooling. This cycle forms a heat dissipation airflow, which in turn cools the second bus capacitor 19, power module 12, AC switch assembly 14, and DC switch assembly 13.
[0042] The inverter of this utility model has a second fan 17 installed between the second bus capacitor 19 and the heat exchanger 11. The layout is reasonable and the structure is compact. It increases the speed of air circulation in the housing 10, greatly improves the heat dissipation efficiency of the inverter, and has a good heat dissipation effect.
[0043] Better, such as Figure 1 , Figure 4 and Figure 5 As shown, the inverter is also provided with a magnetic element 21. The magnetic element 21 is located directly below the heat exchanger 11 inside the housing 10 and behind the AC switch assembly 14. The two ends of the magnetic element 21 are electrically connected to the AC switch assembly 14 and the power module 12, respectively.
[0044] Specifically, the magnetic element 21 typically consists of windings and a magnetic core, and is an essential device for energy storage, energy conversion, and electrical isolation, serving as a voltage regulator and step-down mechanism. The magnetic element 21 can be an inductor or transformer, as per existing technology.
[0045] The magnetic element 21 is located directly below the heat exchanger 11 inside the housing 10 and behind the AC switch assembly 14. The structure is very compact and reasonable, the overall size of the inverter is small, and the power density is high. It facilitates the connection of the magnetic element 21 with the power module 12 and the AC switch assembly 14, making wiring convenient, the connection lines are short, the cost is low, and the power flow lines are short. In addition, the magnetic element 21 can be directly cooled through the heat exchanger 11 and the third fan 20, resulting in good heat dissipation.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. An inverter, characterized in that, include: The enclosure comprises a housing, a heat exchanger disposed within the housing, a power module, a DC switch assembly and an AC switch assembly electrically connected to the power module, the power module being disposed in the front half of the housing, the AC switch assembly being disposed directly below the power module within the housing, the DC switch assembly being disposed directly behind the power module within the housing, and the heat exchanger being disposed between the power module and the DC switch assembly.
2. The inverter according to claim 1, characterized in that: The inverter is also provided with a first bus capacitor, which is located above the power module, the heat exchanger and the DC switch assembly in the enclosure. The two ends of the first bus capacitor are electrically connected to the DC switch assembly and the power module, respectively.
3. An inverter according to claim 2, characterized in that: A first fan is provided behind or in front of the first bus capacitor of the enclosure.
4. An inverter according to claim 3, characterized in that: A second fan is also installed inside the housing, and the second fan is located directly above the heat exchanger.
5. An inverter according to claim 4, characterized in that: A duct partition is provided below the first bus capacitor and the first fan of the enclosure, and above the power module and the DC switch assembly.
6. An inverter according to claim 1, characterized in that: The enclosure also contains a second bus capacitor, which is located between the power module and the DC switch assembly, and is situated above the heat exchanger. The two ends of the second bus capacitor are electrically connected to the DC switch assembly and the power module, respectively.
7. An inverter according to claim 6, characterized in that: A third fan is also provided inside the enclosure, and the third fan is located between the second bus capacitor and the heat exchanger.
8. An inverter according to claim 5 or 7, characterized in that: The inverter is also provided with a magnetic element, which is located directly below the heat exchanger inside the housing and behind the AC switch assembly. The two ends of the magnetic element are electrically connected to the AC switch assembly and the power module, respectively.
9. An inverter according to claim 8, characterized in that: The magnetic element is an inductor or a transformer.