Silent diesel generator

Abstract

The utility model relates to diesel generator technical field especially is related to the mute type diesel generator, including the shell body that has the closed first cavity in the inside, install generator and inverter in the first cavity, install first heat abstractor and second heat abstractor on the generator, the first heat abstractor is used for the heat dissipation of generator, second heat abstractor is used for the heat dissipation of inverter, when using, through setting up the first heat abstractor for the heat dissipation of generator and the second heat abstractor of the heat dissipation of inverter in the shell body, second heat abstractor ensures the heat dissipation stability reliable of inverter, ensures the performance stability reliable of inverter, increases the service life, ensures the whole operation stability reliable of generator, avoids the inverter on the existing diesel engine long -term in high temperature environment, leads to the performance recession of inverter, accelerates component aging, shortens life, permanent damage and efficiency decline, forms vicious circle problem.

Description

Technical Field

[0001] This utility model relates to the field of diesel generator technology, and in particular to a silent diesel generator. Background Technology

[0002] Diesel generators primarily power public facilities, industrial and commercial sectors, and serve as a primary power source in areas lacking access to the public power grid or with underdeveloped grid infrastructure. Diesel generators are widely used due to their high reliability, wide power range, durability, and economy. However, load variations can affect precision equipment with high power quality requirements, leading to unstable output voltage and frequency. Furthermore, fuel efficiency is low under light loads: when operating at loads far below their rated power, fuel efficiency is very low, resulting in severe carbon buildup, which is uneconomical and damages the machine. When faced with sudden load increases or decreases, voltage and frequency recovery takes time, resulting in slow response. Therefore, installing an inverter on the diesel engine provides stable, clean sinusoidal AC power comparable to mains electricity, improving power quality, ensuring the generator always operates in its high-efficiency range, avoiding light-load operation, saving fuel by up to 30%-50%, and improving fuel efficiency. However, due to the long-term operation of the diesel engine, the inverter is also in a high-temperature environment for a long time, which leads to the performance degradation of the inverter, accelerated aging of components, shortened lifespan, permanent damage and reduced efficiency, forming a vicious cycle. Summary of the Invention

[0003] The technical problem to be solved by this utility model is: in order to solve the problem that the inverters on existing diesel engines are in a high-temperature environment for a long time, which leads to the performance degradation of the inverters, accelerated aging of components, shortened lifespan, permanent damage and reduced efficiency, forming a vicious cycle, a silent diesel generator is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a silent diesel generator, including an outer shell with a closed first cavity inside, a generator and an inverter are installed in the first cavity, and a first heat dissipation mechanism and a second heat dissipation mechanism are installed on the generator. The first heat dissipation mechanism is used to dissipate heat from the generator, and the second heat dissipation mechanism is used to dissipate heat from the inverter. The second heat dissipation mechanism includes a first air guide shroud and an exhaust fan. The first air guide shroud is fixedly installed inside a first cavity and forms a second cavity with the outer casing. The inverter is disposed within the second cavity. The outer casing has a first air inlet and a first air outlet. The first air inlet connects the second cavity to the outside, and the first air outlet connects the first cavity to the outside. The exhaust fan is fixedly installed on one side of the generator. The first air guide shroud has a first through hole that matches the fan blades. The generator is located between the first heat dissipation mechanism and the exhaust fan, and the fan blades are disposed within the first through hole. Compared to existing technologies, this solution, by providing a first heat dissipation mechanism for cooling the generator and a second heat dissipation mechanism for cooling the inverter within the outer casing, ensures stable and reliable cooling of the inverter, guarantees stable and reliable inverter performance, increases service life, and ensures stable and reliable overall generator operation.

[0005] To ensure stable and reliable heat dissipation for the inverter, in some preferred embodiments, the inverter is located between the first air inlet and the first through hole. Positioning the inverter between the first air inlet and the first through hole ensures that external cold air directly dissipates heat from the inverter through the first air inlet, thus ensuring stable and reliable heat dissipation for the inverter.

[0006] To ensure sufficient cooling air within the second cavity, in some preferred embodiments, the second heat dissipation mechanism further includes a first slot on the first air guide shroud, which connects the second cavity to the first cavity. A second air inlet is provided on the outer casing, connecting the first cavity to the outside. The second air inlet is located at the bottom of the first cavity, with the first slot facing downwards and corresponding to the second air inlet. By aligning the first slot at the bottom of the first air guide shroud with the second air inlet at the bottom of the outer casing, another portion of cooling air enters and mixes within the second cavity, ensuring sufficient cooling air within the second cavity. This further dissipates heat from the inverter and facilitates heat exchange with the gas within the second cavity.

[0007] To ensure that the required cold air enters the generator's air filter, in some preferred embodiments, the generator's air filter is connected to a second cavity. By connecting the generator's air filter to the second cavity, sufficient cold air from the second cavity is ensured to enter the generator's air filter.

[0008] To ensure that the required cold air enters the generator's air filter, in some preferred embodiments, the second cavity has a main cavity and an auxiliary cavity that are interconnected. The main cavity and the auxiliary cavity are respectively disposed on adjacent side surfaces of the outer casing. The inverter is disposed in the main cavity. The outer casing has a fifth air inlet that communicates with the auxiliary cavity. The generator's air filter is also connected to the auxiliary cavity. Dividing the second cavity into two adjacent, connected main cavities and auxiliary cavities, the main cavity is primarily used for heat dissipation of the inverter, while the auxiliary cavity is primarily used to ensure that the required cold air enters the generator's air filter. Simultaneously, the air in the main cavity and the auxiliary cavity are interconnected, complementing each other and ensuring that the second cavity has sufficient cold air.

[0009] To implement the first heat dissipation mechanism, in some preferred embodiments, the first heat dissipation mechanism includes a second air guide shroud located at the end of the generator away from the induced draft fan. The generator is equipped with a cooling fan that is drively connected to it. The second air guide shroud has a second through hole, which is opposite to the cooling fan. A second slot is provided at the bottom of the second air guide shroud. A third air inlet is provided on the outer shell, connecting the first cavity to the outside. The third air inlet is located at the bottom of the first cavity, with the second slot facing downwards and corresponding to the third air inlet. By installing the second air guide shroud within the first cavity and positioning it opposite to the cooling fan on the generator, heat dissipation of the generator is achieved.

[0010] To dissipate the heat from the generator promptly, in some preferred embodiments, the outer casing is provided with a second air outlet communicating with the first cavity. This second air outlet is located at the bottom of the generator. By opening a second air outlet at the bottom of the outer casing, and positioning the generator above the second air outlet, heat dissipation can be achieved promptly, ensuring stable and reliable generator operation.

[0011] In some preferred embodiments, the outer shell is provided with a fourth air inlet communicating with the first cavity, and the fourth air inlet is located on one side of the second air guide shroud.

[0012] In some preferred embodiments, there are two fourth air inlets, and the second air guide shroud is located between the two fourth air inlets.

[0013] In some preferred embodiments, the generator is located between the first air inlet and the first air outlet.

[0014] The beneficial effects of this utility model are as follows: When the silent diesel generator of this utility model is in use, a first heat dissipation mechanism for cooling the generator and a second heat dissipation mechanism for cooling the inverter are set in the outer casing. The second heat dissipation mechanism ensures stable and reliable cooling of the inverter, ensures stable and reliable performance of the inverter, increases service life, and ensures stable and reliable operation of the generator as a whole. This avoids the problem of inverters on existing diesel engines being in a high-temperature environment for a long time, which leads to performance degradation of the inverter, accelerated aging of components, shortened life, permanent damage and reduced efficiency, forming a vicious cycle. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of the present invention. Figure 2 ; Figure 3 This is the front view of this utility model; Figure 4 This is the left view of this utility model; Figure 5 This is the right view of this utility model; Figure 6 This is a bottom view of the present invention; Figure 7 yes Figure 3 Sectional view of AA; Figure 8 yes Figure 3 BB section view; Figure 9 yes Figure 5 CC section view.

[0017] In the diagram: 1. Outer shell, 2. First cavity, 3. Generator, 4. Inverter, 5. First air guide shroud, 6. Exhaust fan, 7. Second cavity, 701. Main cavity, 702. Auxiliary cavity, 8. First air inlet, 9. First air outlet, 10. First through hole, 11. First slot, 12. Second air inlet, 13. Third air inlet, 14. Second air guide shroud, 15. Cooling fan, 16. Second through hole, 17. Second slot, 18. Fourth air inlet, 19. Second air outlet, 20. Fifth air inlet. Detailed Implementation

[0018] like Figure 1-9As shown, a silent diesel generator includes an outer shell 1 with an internally enclosed first cavity 2. A generator 3 and an inverter 4 are installed inside the first cavity 2. A first heat dissipation mechanism and a second heat dissipation mechanism are installed on the generator 3. The first heat dissipation mechanism is used to dissipate heat from the generator 3, and the second heat dissipation mechanism is used to dissipate heat from the inverter 4. The second heat dissipation mechanism includes a first air guide shroud 5, an exhaust fan 6, and a first slot 11 disposed on the first air guide shroud 5. The first air guide shroud 5 is fixedly installed inside the first cavity 2, forming a second cavity 7 between the first air guide shroud 5 and the outer shell 1. The inverter 4 is disposed inside the second cavity 7. The outer shell 1 is provided with a first air inlet 8 and a first air outlet 9. The first air inlet 8 is used to connect the second cavity 7 to the outside, and the first air outlet 9 is used to connect the first cavity 2 to the outside. The exhaust fan 6 is fixedly installed on one side of the generator 3. The first air guide shroud 5 is provided with... The first through hole 10 matches the fan blades on the induced draft fan 6. The generator 3 is located between the first heat dissipation mechanism and the induced draft fan 6. The fan blades of the induced draft fan 6 are set inside the first through hole 10. The inverter 4 is located between the first air inlet 8 and the first through hole 10. The first slot 11 is used to connect the second cavity 7 with the first cavity 2. The outer shell 1 is provided with a second air inlet 12. The second air inlet 12 is used to connect the first cavity 2 with the outside. The second air inlet 12 is located at the bottom of the first cavity 2. The first slot 11 is set downward and is set corresponding to the second air inlet 12.

[0019] The air filter port of generator 3 is connected to the second cavity 7. The second cavity 7 has a main cavity 701 and an auxiliary cavity 702 that are connected to each other. The main cavity 701 and the auxiliary cavity 702 are respectively arranged on adjacent two sides of the outer casing 1. The inverter 4 is arranged in the main cavity 701. The outer casing 1 is provided with a fifth air inlet 20, which is connected to the auxiliary cavity 702. The air filter port of generator 3 is connected to the auxiliary cavity 702.

[0020] The first heat dissipation mechanism includes a second air guide shroud 14, which is located at the end of the generator 3 away from the induced draft fan 6. The generator 3 is equipped with a cooling fan 15 that is connected to it. The second air guide shroud 14 is provided with a second through hole 16, which is opposite to the cooling fan 15. The bottom of the second air guide shroud 14 is provided with a second slot 17. The outer shell 1 is provided with a third air inlet 13, which is used to connect the first cavity 2 to the outside. The third air inlet 13 is located at the bottom of the first cavity 2. The second slot 17 is set downward and is corresponding to the third air inlet 13. The outer shell 1 is provided with a second air outlet 19 that communicates with the first cavity 2. The second air outlet 19 is located at the bottom of the generator 3. The outer shell 1 is provided with a fourth air inlet 18 that communicates with the first cavity 2. The fourth air inlet 18 is located on one side of the second air guide shroud 14. There are two fourth air inlets 18, and the second air guide shroud 14 is located between the two fourth air inlets 18.

[0021] The generator 3 is located between the first air inlet 8 and the first air outlet 9.

[0022] Its working principle is as follows: When in use, the generator 3 starts, the first heat dissipation mechanism dissipates heat from the generator 3, the cooling fan 15 on one side of the generator 3 rotates and drives the air circulation, the cooling air outside the outer shell 1 enters the first cavity 2 from the outside through the third vent, and then enters the first cavity 2 through the second slot 17 below the second air guide shroud 14. At the same time, two parts of cooling air also enter the first cavity 2 through the fourth air inlet 18 and deliver the cooling air to the generator 3 for heat dissipation. The hot air after heat dissipation is then discharged through the second air outlet 19 at the bottom, thus achieving heat dissipation for the generator 3. Meanwhile, the second heat dissipation mechanism dissipates heat from the inverter 4. The induced draft fan 6 on one side of the generator 3 drives the fan blades to rotate. Cooling air enters the second cavity 7 through the first air inlet 8, the second air inlet 12, the first slot 11, and the third air inlet 13 to dissipate heat from the inverter 4. At the same time, a portion of the cooling air enters the air filter of the engine through the connecting pipe. The first air inlet 8 and the first slot 11 are connected to the main cavity 701, and most of the cooling air enters the main cavity 701 to dissipate heat from the inverter 4. The fifth air inlet 20 is connected to the auxiliary cavity 702, and another portion of the cooling air enters the auxiliary cavity 702 to input cooling air into the air filter of the generator 3. The induced draft fan 6 drives the cooled air to move within the first cavity 2, and finally, it is discharged through the first air outlet 9.

[0023] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A silent diesel generator, comprising an outer casing (1) having an internally enclosed first cavity (2), wherein a generator (3) and an inverter (4) are installed within the first cavity (2), characterized in that: The generator (3) is equipped with a first heat dissipation mechanism and a second heat dissipation mechanism. The first heat dissipation mechanism is used to dissipate heat from the generator (3), and the second heat dissipation mechanism is used to dissipate heat from the inverter (4). The second heat dissipation mechanism includes a first air guide shroud (5) and an exhaust fan (6). The first air guide shroud (5) is fixedly installed inside the first cavity (2) and forms a second cavity (7) with the outer shell (1). The inverter (4) is disposed inside the second cavity (7). The outer shell (1) is provided with a first air inlet (8) and a first air outlet (9). The first air inlet (8) is used to connect the second cavity (7) to the outside. The first air outlet (9) is used to connect the first cavity (2) to the outside. The exhaust fan (6) is fixedly installed on one side of the generator (3). The first air guide shroud (5) is provided with a first through hole (10) that matches the fan blades on the exhaust fan (6). The generator (3) is located between the first heat dissipation mechanism and the exhaust fan (6). The fan blades of the exhaust fan (6) are disposed inside the first through hole (10).

2. The silent diesel generator according to claim 1, characterized in that: The inverter (4) is located between the first air inlet (8) and the first through hole (10).

3. The silent diesel generator according to claim 1, characterized in that: The second heat dissipation mechanism also includes a first slot (11) provided on the first air guide shroud (5). The first slot (11) is used to connect the second cavity (7) with the first cavity (2). The outer shell (1) is provided with a second air inlet (12). The second air inlet (12) is used to connect the first cavity (2) with the outside. The second air inlet (12) is located at the bottom of the first cavity (2). The first slot (11) is set downward and is set corresponding to the second air inlet (12).

4. The silent diesel generator according to claim 1, characterized in that: The air filter port of the generator (3) is connected to the second cavity (7).

5. The silent diesel generator according to claim 4, characterized in that: The second cavity (7) has a main cavity (701) and an auxiliary cavity (702) that are interconnected. The main cavity (701) and the auxiliary cavity (702) are respectively disposed on adjacent two sides of the outer shell (1). The inverter (4) is disposed in the main cavity (701). The outer shell (1) is provided with a fifth air inlet (20). The fifth air inlet (20) is connected to the auxiliary cavity (702). The air filter of the generator (3) is connected to the auxiliary cavity (702).

6. The silent diesel generator according to claim 1, characterized in that: The first heat dissipation mechanism includes a second air guide shroud (14), which is located at the end of the generator (3) away from the induced draft fan (6). The generator (3) is provided with a cooling fan (15) that is connected to it in a transmission. The second air guide shroud (14) is provided with a second through hole (16), which is opposite to the cooling fan (15). The bottom of the second air guide shroud (14) is provided with a second slot (17). The outer shell (1) is provided with a third air inlet (13), which is used to connect the first cavity (2) with the outside. The third air inlet (13) is located at the bottom of the first cavity (2). The second slot (17) is set downward and is set opposite to the third air inlet (13).

7. The silent diesel generator according to claim 6, characterized in that: The outer shell (1) is provided with a second air outlet (19) that communicates with the first cavity (2), and the second air outlet (19) is located at the bottom of the generator (3).

8. The silent diesel generator according to claim 7, characterized in that: The outer shell (1) is provided with a fourth air inlet (18) that communicates with the first cavity (2), and the fourth air inlet (18) is located on one side of the second air guide shroud (14).

9. The silent diesel generator according to claim 8, characterized in that: There are two fourth air inlets (18), and the second air guide shroud (14) is located between the two fourth air inlets (18).

10. The silent diesel generator according to claim 1, characterized in that: The generator (3) is located between the first air inlet (8) and the first air outlet (9).

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