A multi-cooling-duct generator assembly

Abstract

The utility model provides a kind of generator assembly of multiple cooling air flue belongs to generator technical field.It solves the poor heat dissipation effect of existing muffler core body problem.The generator assembly of multiple cooling air flue, including casing, inverter, power assembly cover being arranged in casing, power assembly being arranged in power assembly cover, muffler shell and muffler core body being arranged in muffler shell, muffler shell is communicated with power assembly cover, power assembly includes crankshaft and cylinder head, the front end of crankshaft is fixed with centrifugal fan blade one, the rear end of power assembly has fan blade cavity, centrifugal fan blade two is fixed in the rear end of crankshaft in fan blade cavity, muffler shell is communicated with fan blade cavity.The structure is cooled by three cooling air flues respectively to cylinder head, power assembly bottom, inverter and muffler core body, improve the cooling effect of muffler core body.

Description

Technical Field

[0001] This utility model belongs to the field of generator technology, and in particular to a generator assembly with multiple cooling air ducts. Background Technology

[0002] When a closed-type generator is running, the casing and cover emit heat, resulting in a high internal temperature. If the hot air inside the casing cannot be effectively expelled, the heat will accumulate, causing the engine temperature to rise and affecting its performance and lifespan.

[0003] Currently, a Chinese patent discloses a cooling air duct for a silent inverter generator set [Authorization Announcement No.: CN113364212B], including an independent cooling air duct for the inverter, an independent cooling air duct for the motor, and an independent cooling air duct for the sealed chamber. The independent cooling air duct for the inverter: external cooling air entering through the first louver passes through the perimeter of the inclined fin heat sink and enters the fully enclosed air intake channel, then flows into the starter pull plate at the tail end of the inverter air guide shroud, enters the engine hood, and finally exits through the muffler cover. The independent cooling air duct for the motor: when the motor is rotating, a dual-blade centrifugal motor fan draws in external cooling air through the second louver, enters the power chamber through the first air inlet on the motor air guide shroud, cools the motor in the power chamber, and then exits through the exhaust channel. The independent cooling air duct for the sealed chamber: when the motor is rotating, a dual-blade centrifugal motor fan draws in external cooling air through the third louver, the cooling air enters the sealed chamber and carries away the high temperature of the sealed chamber, enters the power chamber through the second air inlet on the front cover of the motor, and finally exits through the exhaust channel.

[0004] The aforementioned silent variable frequency generator set cooling duct has the following defects: the cooling air of each cooling duct is finally discharged to the outside through multiple air outlets, and the muffler is a component that is prone to heat generation, so the heat dissipation and cooling effect of the muffler is not very ideal. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a generator assembly with multiple cooling air ducts. The technical problem to be solved by this invention is: how to improve the heat dissipation effect on the muffler core.

[0006] The objective of this utility model can be achieved through the following technical solutions: A generator assembly with multiple cooling ducts includes a housing, an inverter, a powertrain housing housed within the housing, a powertrain assembly housed within the powertrain housing, a muffler housing, and a muffler core housed within the muffler housing. The muffler housing is connected to the powertrain housing. The powertrain includes a crankshaft and a cylinder head. A centrifugal fan blade is fixed to the front end of the crankshaft. The powertrain has a fan blade cavity at its rear end, and a second centrifugal fan blade fixed to the rear end of the crankshaft is located within the fan blade cavity. The muffler housing is connected to the fan blade cavity. A first cooling air duct is formed from the front end of the powertrain housing to the inside of the muffler housing. Cooling air flows through the first cooling air duct, passes through the cylinder head, and enters the inside of the muffler housing. A second cooling air duct is formed between the bottom of the powertrain and the powertrain housing from front to back. The bottom of the fan blade cavity is connected to the second cooling air duct. Cooling air flows through the second cooling air duct, passes through the bottom of the powertrain, and enters the fan blade cavity. The cooling air in the fan blade cavity is thrown into the muffler housing by the centrifugal fan blade. A third cooling air duct is formed from the rear end of the casing to the second centrifugal fan blade. The inverter is located behind the second centrifugal fan blade. The third cooling air duct flows through the inverter, and the cooling air flows through the inverter and enters the fan blade cavity. The cooling air in the fan blade cavity is thrown into the muffler housing by the second centrifugal fan blade.

[0007] After the generator starts, the crankshaft drives centrifugal fan blade one and centrifugal fan blade two to rotate. After centrifugal fan blade one rotates, cooling air is drawn into the powertrain housing. Centrifugal fan blade one sends a portion of the cooling air to the first cooling air duct. The cylinder head is located on the path of the first cooling air duct. As the cooling air flows through the first cooling air duct, it carries away the heat from the cylinder head and cools it down. The cooling air enters the muffler housing through the first cooling air duct, thereby cooling the muffler core inside the muffler housing. Centrifugal fan blade one sends another portion of the cooling air to the second cooling air duct. As the cooling air flows through the second cooling air duct, it carries away the heat from the bottom of the powertrain and cools down the lubricating oil inside the powertrain, extending the service life of the lubricating oil. Since the fan blade cavity is connected to the second cooling air duct, the cooling air enters the fan blade cavity through the second cooling air duct, supplying air to the fan blade cavity and increasing the air intake of the fan blade cavity. The fan blade cavity is also connected to the muffler housing. Centrifugal fan blade two throws the cooling air into the muffler housing to cool down the muffler core. After the second centrifugal fan rotates, it draws the cooling air into the third cooling duct. The inverter is located in the path of the third cooling duct. As the cooling air flows through the third cooling duct, it carries away the heat of the inverter and cools it down. Then the cooling air enters the fan blade cavity, and the second centrifugal fan throws the cooling air into the muffler housing to cool the muffler core.

[0008] This structure uses three cooling air ducts to cool the cylinder head, the bottom of the powertrain, the inverter, and the muffler core respectively. After the centrifugal fan blades rotate, the air intake of the fan blade cavity is supplemented through a second cooling air duct, increasing the air intake of the fan blade cavity and thus increasing the cooling air volume entering the muffler housing, thereby improving the cooling effect on the muffler core. In addition, the cooling air from all three cooling air ducts of this structure eventually enters the muffler housing to cool the muffler core, resulting in a very good cooling effect on the muffler core.

[0009] In the aforementioned multi-cooling-duct generator assembly, the second centrifugal fan includes a fan base plate, on which centrifugal blades are distributed on both the front and rear sides. The second centrifugal fan in this structure is a double-sided centrifugal structure. When the second centrifugal fan rotates, the centrifugal blades on the front side draw cooling air from the second cooling duct into the fan blade cavity, thereby accelerating the airflow speed within the second cooling duct. This improves the cooling effect on the bottom of the powertrain and also increases the airflow volume into the fan blade cavity. The centrifugal blades on the rear side draw external cooling air into the third cooling duct.

[0010] In the aforementioned multi-cooling-duct generator assembly, the inverter housing has an air inlet and an air outlet. The power assembly includes a rear end cover with the aforementioned fan blade cavity. An air inlet is provided on the rear side of the end cover, and the inverter housing is fixed to the rear side of the end cover. The air outlet communicates with the air inlet. The inverter is disposed inside the inverter housing and located between the air inlet and the air outlet. When the centrifugal fan blade rotates, external cooling air enters the inverter housing through the air inlet and then flows out through the air outlet. During this process, the heat of the inverter is carried away, cooling the inverter. The cooling air flows out from the air outlet and then enters the fan blade cavity through the air inlet.

[0011] In the aforementioned multi-cooling-duct generator assembly, the rear side of the housing has a grid plate, and the rear end of the inverter housing has a side plate. The side plate is located between the inverter and the grid plate. At least one row of air inlets is horizontally spaced along the middle of the side plate. Ventilation gaps exist between the top of the inverter and the inverter housing, and between the bottom of the inverter and the inverter housing. In this structure, the grid plate ensures that external air can enter the housing. When the centrifugal fan rotates, external cooling air enters the housing through the grid plate and then enters the inverter housing through the air inlets. Since the air inlets are located in the middle of the side plate, the cooling air blows directly onto the middle of the inverter after passing through the air inlets. The cooling air then diffuses vertically and horizontally around the inverter. The ventilation gaps allow the cooling air to flow around the inverter, maximizing contact between the cooling air and the inverter and improving the cooling effect.

[0012] In the aforementioned multi-cooling-duct generator assembly, the inverter includes a radiator positioned near the side panel, with its center corresponding to an air inlet. This structure allows cooling air to enter the inverter housing through the air inlet and then directly blow onto the center of the radiator, directly cooling it and improving the inverter's cooling effect.

[0013] In the aforementioned generator assembly with multiple cooling ducts, the bottom of the end cover is provided with an air inlet three that connects to the second cooling duct. The air inlet three connects the second cooling duct to the fan blade cavity, allowing the cooling air in the second cooling duct to enter the fan blade cavity.

[0014] In the aforementioned multi-cooling-duct generator assembly, the muffler housing is located above the fan blade cavity, and the top of the fan blade cavity is connected to the muffler housing. Because the muffler housing is located above the fan blade cavity, when the centrifugal fan blades rotate, the cooling air is thrown upwards into the muffler housing.

[0015] Compared with the prior art, the multi-cooling-duct generator assembly of this utility model has the following advantages: This structure uses three cooling ducts to cool the cylinder head, the bottom of the powertrain, the inverter, and the muffler core respectively. After the centrifugal fan blades rotate, the air intake of the fan blade cavity is supplemented through the second cooling duct, increasing the air intake of the fan blade cavity and thus increasing the cooling air volume entering the muffler housing, thereby improving the cooling effect on the muffler core. In addition, the cooling air from the three cooling ducts of this structure finally enters the muffler housing to cool the muffler core, resulting in a very good cooling effect on the muffler core. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention with the casing removed.

[0018] Figure 3 This is one of the partial cross-sectional structural schematic diagrams of this utility model.

[0019] Figure 4 This is the second partial cross-sectional structural schematic diagram of this utility model.

[0020] Figure 5 This is a schematic diagram of the partial explosion structure of this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the end cap of this utility model.

[0022] Figure 7 This is a three-dimensional structural schematic diagram of the centrifugal fan blade II of this utility model.

[0023] In the diagram, 1. Housing; 2. Inverter; 3. Powertrain housing; 4. Powertrain; 40. Crankshaft; 41. Cylinder head; 5. Muffler housing; 6. Muffler core; 7. Centrifugal fan blade one; 8. Fan blade cavity; 9. Centrifugal fan blade two; 90. Fan blade base plate; 91. Centrifugal blade; 13. End cover; 130. Air inlet two; 131. Air inlet three; 14. Inverter housing; 140. Air inlet one; 141. Air outlet one; 142. Side plate; 15. Grid plate. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] like Figures 1 to 7 As shown, the generator assembly with multiple cooling air ducts includes a housing 1, an inverter 2, a powertrain cover 3 disposed within the housing 1, a powertrain 4 disposed within the powertrain cover 3, a muffler housing 5, and a muffler core 6 disposed within the muffler housing 5. The muffler housing 5 is connected to the powertrain cover 3. The powertrain 4 includes a crankshaft 40 and a cylinder head 41. A centrifugal fan blade 7 is fixed at the front end of the crankshaft 40, and a fan blade cavity 8 is provided at the rear end of the powertrain 4. A second centrifugal fan blade 9 is fixed to the rear end of the crankshaft 40 within the fan blade cavity 8. The muffler housing 5 is connected to the fan blade cavity 8. In this embodiment, the muffler housing 5 is located above the fan blade cavity 8, and the top end of the fan blade cavity 8 is connected to the muffler housing 5.

[0026] A first cooling air duct is formed from the front end of the powertrain housing 3 to the inside of the muffler housing 5. Cooling air flows through the first cooling air duct, passes through the cylinder head 41, and enters the muffler housing 5. A second cooling air duct is formed between the bottom of the powertrain and the powertrain housing 3 from front to back. The bottom of the fan blade cavity 8 is connected to the second cooling air duct. In this embodiment, the bottom of the end cover 13 is provided with an air inlet 131 that connects to the second cooling air duct. The cooling air flows through the second cooling air duct, passes through the bottom of the powertrain, and enters the fan blade cavity 8. The cooling air in the fan blade cavity 8 is thrown into the muffler housing 5 by the centrifugal fan blade 9. A third cooling air duct is formed from the rear end of the casing 1 to the centrifugal fan blade 9. The inverter 2 is located behind the centrifugal fan blade 9. The third cooling air duct flows through the inverter 2. The cooling air flows through the third cooling air duct through the inverter 2 and enters the fan blade cavity 8. The cooling air in the fan blade cavity 8 is thrown into the muffler casing 5 by the centrifugal fan blade 9.

[0027] After the generator starts, the front end of the powertrain housing 3 has an opening for air intake, and the crankshaft 40 drives the centrifugal fan blades 7 and 9 to rotate. Figure 4 As shown, the arrow indicates the direction of cooling airflow in the first cooling air duct. After the centrifugal fan 7 rotates, the cooling air is drawn into the powertrain housing 3. The centrifugal fan 7 sends a portion of the cooling air to the first cooling air duct. The cylinder head 41 is located on the path of the first cooling air duct. As the cooling air flows through the first cooling air duct, it carries away the heat from the cylinder head 41, thus cooling the cylinder head 41. The cooling air enters the muffler housing 5 through the first cooling air duct, thereby cooling the muffler core 6 inside the muffler housing 5. The muffler housing 5 has an air outlet 2, from which the cooling air is discharged outward. like Figure 3 As shown, the arrow on the left side of centrifugal fan blade 2 9 indicates the cooling airflow direction of the second cooling air duct. Centrifugal fan blade 1 7 sends another part of the cooling air into the second cooling air duct. During the process of the cooling air flowing through the second cooling air duct, it carries away the heat at the bottom of the powertrain 4 and cools down the lubricating oil inside the powertrain 4, extending the service life of the lubricating oil. Since the fan blade cavity 8 is connected to the second cooling air duct, the cooling air enters the fan blade cavity 8 through the second cooling air duct, supplying air to the fan blade cavity 8 and increasing the air intake of the fan blade cavity 8. The fan blade cavity 8 is also connected to the muffler housing 5. Centrifugal fan blade 2 9 throws the cooling air into the muffler housing 5 to cool down the muffler core 6. like Figure 3 As shown, the arrow on the right side of centrifugal fan blade 2 9 indicates the cooling airflow direction of the third cooling air duct. After centrifugal fan blade 2 9 rotates, it draws the cooling air into the third cooling air duct. The inverter 2 is located in the path of the third cooling air duct. As the cooling air flows through the third cooling air duct, it carries away the heat of the inverter 2 and cools it down. Then, the cooling air enters the fan blade cavity 8. Centrifugal fan blade 2 9 throws the cooling air into the muffler housing 5 to cool the muffler core 6.

[0028] This structure uses three cooling air ducts to cool the cylinder head 41, the bottom of the powertrain 4, the inverter 2, and the muffler core 6 respectively. After the centrifugal fan blade 7 rotates, it supplements the air intake of the fan blade cavity 8 through the second cooling air duct, increasing the air intake of the fan blade cavity 8, thereby increasing the cooling air volume entering the muffler housing 5 and improving the cooling effect on the muffler core 6. In addition, the cooling air from the three cooling air ducts of this structure finally enters the muffler housing 5 to cool the muffler core 6, resulting in a very good cooling effect on the muffler core 6.

[0029] like Figure 7 As shown, the centrifugal fan blade 9 includes a fan blade base plate 90, on which centrifugal blades 91 are distributed on both the front and rear sides. The centrifugal fan blade 9 of this structure is a double-sided centrifugal structure. When the centrifugal fan blade 9 rotates, the centrifugal blades 91 on the front side of the centrifugal fan blade 9 draw the cooling air in the second cooling air duct into the fan blade cavity 8, thereby accelerating the flow speed of the cooling air in the second cooling air duct. On the one hand, this improves the cooling effect on the bottom of the powertrain 4, and on the other hand, it also increases the air intake volume in the fan blade cavity 8. The centrifugal blades 91 on the rear side of the centrifugal fan blade 9 draw the external cooling air into the third cooling air duct.

[0030] like Figure 3 and Figure 6 As shown, the powertrain 4 includes a rear end cover 13 with a fan blade cavity 8. An air inlet 130 is provided on the rear side of the end cover 13. An inverter housing 14 is fixed to the rear side of the end cover 13. The inverter housing 14 has an air inlet 140 and an air outlet 141, which communicates with the air inlet 130. The inverter 2 is disposed inside the inverter housing 14 and located between the air inlet 140 and the air outlet 141. When the centrifugal fan blade 9 rotates, external cooling air enters the inverter housing 14 through the air inlet 140 and then flows out through the air outlet 141. This process carries away the heat from the inverter 2, cooling it down. The cooling air then flows out through the air outlet 141 and re-enters the fan blade cavity 8 through the air inlet 130.

[0031] like Figure 1 , Figure 3 and Figure 5As shown, the rear side of the housing 1 has a grid plate 15, and the rear end of the inverter housing 14 has a side plate 142. The side plate 142 is located between the inverter 2 and the grid plate 15. At least one row of air inlets 140 is arranged horizontally at intervals in the middle of the side plate 142. There are ventilation gaps 16 between the top of the inverter 2 and the inverter housing 14, and between the bottom of the inverter 2 and the inverter housing 14. In this embodiment, the inverter 2 includes a heat sink 20, which is disposed near the side plate 142, and the middle of the heat sink 20 corresponds to the air inlet 140. The grid plate 15 ensures that outside air can enter the housing 1. When the centrifugal fan blade 9 rotates, the outside cooling air enters the housing 1 through the grid plate 15, and then enters the inverter housing 14 through the air inlet 140. Since the air inlet 140 is located in the middle of the side plate 142, the cooling air blows onto the middle of the inverter 2 after passing through the air inlet 140. Then the cooling air diffuses to the top, bottom and left and right of the inverter 2. The ventilation spacing allows the cooling air to flow around the inverter 2, and the cooling air contacts the inverter 2 to the maximum extent, improving the cooling effect on the inverter 2. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A generator assembly with multiple cooling ducts, comprising a housing (1), an inverter (2), a powertrain housing (3) disposed within the housing (1), a powertrain (4) disposed within the powertrain housing (3), a muffler housing (5), and a muffler core (6) disposed within the muffler housing (5), wherein the muffler housing (5) is connected to the powertrain housing (3), and the powertrain (4) comprises a crankshaft (40) and a cylinder head (41), wherein a centrifugal fan blade (7) is fixed at the front end of the crankshaft (40), characterized in that, The powertrain (4) has a fan blade cavity (8) at its rear end, and a centrifugal fan blade (9) fixed to the rear end of the crankshaft (40) is located inside the fan blade cavity (8). The muffler housing (5) is connected to the fan blade cavity (8). A first cooling air duct is formed from the front end of the powertrain housing (3) to the inside of the muffler housing (5). The cooling air flows through the first cooling air duct, passes through the cylinder head (41), and enters the inside of the muffler housing (5). A second cooling air duct is formed between the bottom of the powertrain and the powertrain housing (3) from front to back. The bottom of the fan blade cavity (8) is connected to the second cooling air duct. The cooling air flows through the second cooling air duct through the bottom of the powertrain and enters the fan blade cavity (8). The cooling air in the fan blade cavity (8) is thrown into the muffler housing (5) by the centrifugal fan blade (9). A third cooling air duct is formed from the rear end of the housing (1) to the centrifugal fan blade two (9). The inverter (2) is located behind the centrifugal fan blade two (9). The third cooling air duct flows through the inverter (2). The cooling air flows through the inverter (2) through the third cooling air duct and enters the fan blade cavity (8). The cooling air in the fan blade cavity (8) is thrown into the muffler housing (5) by the centrifugal fan blade two (9).

2. The generator assembly with multiple cooling ducts according to claim 1, characterized in that, The centrifugal fan blade 2 (9) includes a fan blade base plate (90), and centrifugal blades (91) are distributed on both the front and rear sides of the fan blade base plate (90).

3. The generator assembly with multiple cooling ducts according to claim 1, characterized in that, The powertrain (4) includes an end cover (13) located on the rear side, the end cover (13) having the fan blade cavity (8), an air inlet two (130) opened on the rear side of the end cover (13), an inverter housing (14) fixed on the rear side of the end cover (13), the inverter housing (14) having an air inlet one (140) and an air outlet one (141), the air outlet one (141) communicating with the air inlet two (130), and the inverter (2) being disposed inside the inverter housing (14) and located between the air inlet one (140) and the air outlet one (141).

4. A generator assembly with multiple cooling ducts according to claim 3, characterized in that, The rear side of the housing (1) has a grid plate (15), and the rear end of the inverter housing (14) has a side plate (142). The side plate (142) is located between the inverter (2) and the grid plate (15). At least one row of air inlets (140) is arranged horizontally in the middle of the side plate (142). There is a ventilation gap (16) between the top of the inverter (2) and the inverter housing (14) and between the bottom of the inverter (2) and the inverter housing (14).

5. A generator assembly with multiple cooling ducts according to claim 4, characterized in that, The inverter (2) includes a heat sink (20) which is located near the side plate (142) and the middle part of the heat sink (20) corresponds to the air inlet (140).

6. A generator assembly with multiple cooling ducts according to claim 3, characterized in that, The bottom of the end cap (13) is provided with an air inlet three (131) that connects to the second cooling air duct.

7. A generator assembly with multiple cooling ducts according to claim 1 or 3, characterized in that, The muffler housing (5) is located above the fan blade cavity (8), and the top of the fan blade cavity (8) is connected to the muffler housing (5).

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