Rain and dust proof small diesel frequency conversion generator set

Abstract

The application discloses a rainproof and dustproof small diesel frequency conversion generator set, and relates to the technical field of diesel generators. The louvers are uniformly arranged from top to bottom in the inside of the connecting frame, and the louvers are inclined downward from inside to outside. The bottom of the two sides of the air inlet box is provided with a through groove, and the through groove is located between the connecting frame and the mesh cover. The rainproof and dustproof small diesel frequency conversion generator set is provided with the louvers, the mesh cover and the connecting frame. In the outdoor working environment in rainy days, the rainwater driven by air flow enters the air inlet box and is blocked by the louvers. Then, the rainwater flows along the inclination of the louvers, and flows into the connecting frame and the mesh cover under the gravity of the rainwater. The rainwater is guided out of the air inlet box along the through groove at the bottom of the two sides of the air inlet box. In the outdoor working environment in rainy days, the rainwater cannot be guided out after entering the air inlet position, and the equipment is eroded by the rainwater.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of diesel generators, in particular to a rainproof and dustproof small diesel frequency conversion generator set. BACKGROUND

[0002] The diesel frequency conversion generator set is a new type of power generation equipment combined with traditional diesel generators and frequency conversion technology. The core is to rectify, filter and invert the electric energy generated by the diesel engine driving generator through the frequency conversion module, realize the precise and stable control of output voltage and frequency, and adapt to different types of loads. The core working principle of the diesel generator is to convert the chemical energy of diesel fuel into mechanical energy through combustion, and then drive the generator to convert the mechanical energy into electric energy.

[0003] When the diesel generator works in the outdoor rainy environment, the rainwater is easily carried by the air flow when the diesel engine works, enters the equipment, cannot be discharged, and causes the equipment to be eroded and damaged by the rainwater. At the same time, when the foreign matter entering the diesel enters the diesel engine, it is easy to cause the diesel engine to stall. SUMMARY

[0004] To solve the above technical problems, the present application is realized by the following technical scheme: a rainproof and dustproof small diesel frequency conversion generator set, comprising:

[0005] A rack is internally provided with a diesel engine and a generator. The output shaft of the diesel engine is fixedly connected with the input shaft of the generator through a shaft coupling. A frequency conversion unit is internally provided in the rack and electrically connected with the generator.

[0006] An air inlet mechanism and an exhaust mechanism are provided. The exhaust mechanism is installed at the exhaust port of the diesel engine. The air inlet mechanism is connected with the air inlet of the diesel engine.

[0007] An oil filter mechanism and an oil pump are provided. The liquid inlet of the oil pump is connected with the oil filter mechanism. The liquid outlet of the oil pump is communicated with the oil line of the diesel engine through a pipeline.

[0008] The air inlet mechanism comprises an air inlet box, the inner wall of the air inlet box is fixedly installed with a connecting frame, the inner wall of the connecting frame is fixedly installed with louver plates, the louver plates are uniformly installed inside the connecting frame from top to bottom, and the louver plates are inclined downward from inside to outside, the outer side of the air inlet box is fixedly installed with a mesh cover, and the louver plates cooperate with the mesh cover and the connecting frame.

[0009] Preferably, the inner wall of the air inlet box is fixedly installed with a hollow groove plate, the outer side of the hollow groove plate is uniformly provided with a plurality of rectangular grooves, the side of the hollow groove plate away from the connecting frame is fixedly installed with a hollow groove cover, the hollow groove cover corresponds to the rectangular grooves of the hollow groove plate in a one-to-one manner, the side of the air inlet box close to the diesel engine is fixedly installed with a communication pipe, the air inlet box is fixedly connected with the air inlet of the diesel engine through the communication pipe, the inner wall of the hollow groove cover is slidably installed with an inner sliding plate, the rectangular grooves of the hollow groove cover cooperate with the rock wool plates to filter the air when the air is guided out along the rectangular grooves during air inlet, and the remaining hollow groove covers still work normally to ensure the air demand of the diesel engine when one hollow groove cover is blocked.

[0010] Preferably, the two ends of the side of the inner sliding plate away from the hollow groove plate are fixedly installed with guide rods, one end of the guide rod away from the inner sliding plate penetrates through the hollow groove cover and extends to the other side thereof, and a rubber gasket ring is clamped between the inner sliding plate and the hollow groove cover, the rubber gasket ring cooperates with the guide rod and the inner sliding plate, when the air inlet pressure increases, the pressure is transmitted to the rubber gasket ring through the inner sliding plate, the rubber gasket ring deforms, the inner sliding plate slides in the hollow groove cover, the area of the rock wool plate contacting the air is increased, the filtering area is increased, and when the air inlet amount increases, the air is smoothly filtered.

[0011] Preferably, the exhaust mechanism comprises a connecting pipe, one end of the connecting pipe is fixedly connected with the exhaust port of the diesel engine, and the end of the connecting pipe away from the diesel engine is curved upward, a silencer is fixedly installed at the end of the connecting pipe away from the diesel engine, a leading-out pipe is fixedly installed at the top of the silencer, a partition plate is fixedly installed at the end of the connecting pipe close to the diesel engine, and the exhaust gas is guided by the partition plate in cooperation with the drain hole of the connecting pipe when the rainwater enters along the leading-out pipe, penetrates into the inside of the connecting pipe, and is guided by the partition plate, so that the rainwater below the partition plate is prevented from being driven, the rainwater is smoothly led out of the drain hole, and the rainwater is prevented from entering the inside of the diesel engine to cause the diesel engine to be unable to work, the end of the partition plate away from the diesel engine is inclined upward, and the bottom of the connecting pipe is uniformly provided with drain holes below the partition plate.

[0012] Preferably, the oil filtering mechanism comprises an oil tank, an oil inlet pipe is fixedly installed at the top of the oil tank, a guide pipe is arranged at the bottom of the oil tank close to the oil pump, the oil tank is fixedly connected with the oil inlet of the oil pump through the guide pipe, a through-groove plate is fixedly installed on the inner wall of the oil tank, uniform through-grooves are formed in the outer side of the through-groove plate, the bottom of the through-groove plate is inclined away from the guide pipe, a rectangular groove is formed in the top of the through-groove plate, a filter plate is fixedly installed at the rectangular groove of the through-groove plate, and an inner partition plate is fixedly installed at the bottom of the through-groove plate.

[0013] Preferably, the inner wall of the oil tank is fixedly installed with a guide plate, the bottom of the guide plate is inclined to the side of the inner partition plate, the guide plate is below the through-groove plate, a missing-groove plate is fixedly installed at the bottom of the guide plate, uniform missing grooves are formed in the bottom of the missing-groove plate, and a guide frame is fixedly installed at the bottom of the side of the through-groove plate close to the guide plate, the oil tank is divided into three areas through cooperation of the guide plate and the through-groove plate, that is, an initial filtering area above the through-groove plate, a fine filtering area between the through-groove plate and the guide plate, and a leading-out area below the guide plate, so that the diesel oil can be led out of the guide pipe only after sequentially passing through the three areas, impurities are prevented from entering the diesel engine to cause the diesel engine to be extinguished, a magnetic bar is fixedly installed on the inner wall of the guide frame, and the magnetic bars are uniformly and staggeredly installed in the guide frame from top to bottom.

[0014] The application provides a rainproof and dustproof small diesel frequency conversion generator set.

[0015] (I), the rain and dust prevention small diesel frequency conversion generator set, through the baffle cooperation net cover and connecting frame, in the rain outdoor working environment, the rainwater driven by air flow into the air inlet box is blocked by the baffle, then along the inclination of the baffle, the rainwater flows into the connecting frame and the net cover under its own gravity, so that the rainwater is guided out of the air inlet box along the through groove at the bottom of the air inlet box, avoiding the rainwater entering the air inlet position when working in the outdoor rainy environment, which cannot be guided out, resulting in the erosion of the equipment by the rainwater.

[0016] (II), the rain and dust prevention small diesel frequency conversion generator set, through the cooperation of the slot of the air slot cover and the rock wool board, when air is guided out along the slot, the air is filtered by the gap structure of the rock wool board, and meanwhile, when one air slot cover is blocked, the remaining air slot covers still work normally to ensure the air demand of the diesel engine.

[0017] (III), the rain and dust prevention small diesel frequency conversion generator set, through the cooperation of the rubber gasket ring and the inner slide plate, when the air inlet pressure increases, the pressure is transmitted to the rubber gasket ring through the inner slide plate, so that the rubber gasket ring deforms, the inner slide plate slides in the air slot cover, the contact area of the rock wool board with air is increased, the filtering area is increased, and when the air inlet amount increases, the filtering is completed smoothly.

[0018] (IV), the rain and dust prevention small diesel frequency conversion generator set, through the cooperation of the partition plate and the drain hole of the connecting pipe, when the rainwater enters along the guide pipe and seeps into the inside of the connecting pipe, the discharged waste gas is guided by the partition plate to prevent the rainwater below the partition plate from being driven, so that the rainwater is smoothly guided out of the drain hole, avoiding the rainwater entering the diesel engine and causing the diesel engine to stop working.

[0019] (V), the rain and dust prevention small diesel frequency conversion generator set, through the cooperation of the guide plate and the through groove plate, the oil tank is divided into three areas, namely the primary filtering area above the through groove plate, the fine filtering area between the through groove plate and the guide plate, and the guide-out area below the guide plate, so that the diesel oil can be guided out of the guide pipe only after passing through the three areas, preventing impurities from entering the diesel engine and causing the diesel engine to stall. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the whole invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the whole invention;

[0022] Figure 3 It is a side view of the structure of the whole invention;

[0023] Figure 4 It is a side view of the internal structure of the whole invention;

[0024] Figure 5 Structure of the exhaust mechanism of the present application;

[0025] Figure 6 Structure of the oil filter mechanism of the present application;

[0026] Figure 7 Structure of the oil filter mechanism of the present application;

[0027] Figure 8 Structure of the oil filter mechanism of the present application;

[0028] Figure 9 Structure of the air intake mechanism of the present application;

[0029] Figure 10 Structure of the air intake mechanism of the present application;

[0030] Figure 11 Structure of the air intake mechanism of the present application;

[0031] Figure 12 Structure of the air intake mechanism of the present application;

[0032] In the figure: 1, frame; 2, air intake mechanism; 3, diesel engine; 4, frequency conversion unit; 5, generator; 6, oil filter mechanism; 7, oil pump; 8, exhaust mechanism; 201, air intake box; 202, mesh cover; 203, connecting frame; 204, louver; 205, communication pipe; 206, hollow groove plate; 207, hollow groove cover; 208, inner sliding plate; 209, rock wool plate; 210, guide rod; 211, rubber gasket ring; 61, oil tank; 62, oil inlet pipe; 63, inner partition plate; 64, flow guide plate; 65, filter plate; 66, through groove plate; 67, missing groove plate; 68, magnetic bar; 69, flow guide frame; 81, connecting pipe; 82, silencer; 83, discharge pipe; 84, partition plate; 85, drain hole. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] The first embodiment, please refer to Figures 1 to 3 and Figures 9 to 12 The present application provides a technical solution:

[0035] A rain and dust proof small diesel frequency conversion generator set, comprising:

[0036] The rack 1 is internally provided with a diesel engine 3 and a generator 5, the output shaft of the diesel engine 3 is fixedly connected with the input shaft of the generator 5 through a shaft coupling, the rack 1 is internally provided with a frequency conversion unit 4, and the frequency conversion unit 4 is electrically connected with the generator 5;

[0037] The air inlet mechanism 2 is connected with the air inlet of the diesel engine 3, and the exhaust mechanism 8 is arranged at the air outlet of the diesel engine 3;

[0038] The oil filter mechanism 6 is connected with the oil inlet of the oil pump 7, and the oil outlet of the oil pump 7 is communicated with the oil pipeline of the diesel engine 3 through a pipeline;

[0039] The air inlet mechanism 2 comprises an air inlet box 201, the inner wall of the air inlet box 201 is fixedly provided with a connecting frame 203, the inner wall of the connecting frame 203 is fixedly provided with baffle plates 204, the baffle plates 204 are uniformly arranged in the connecting frame 203 from top to bottom, and the baffle plates 204 are inclined downward from inside to outside, and the outer side of the air inlet box 201 is fixedly provided with a mesh cover 202.

[0040] The inner wall of the air inlet box 201 is fixedly provided with an air slot plate 206, the outer side of the air slot plate 206 is uniformly provided with a plurality of rectangular grooves, the side, away from the connecting frame 203, of the air slot plate 206 is fixedly provided with an air slot cover 207, the air slot cover 207 corresponds to the rectangular grooves of the air slot plate 206 in a one-to-one manner, and the side, close to the diesel engine 3, of the air inlet box 201 is fixedly provided with a communication pipeline 205, the air inlet box 201 is fixedly connected with the air inlet of the diesel engine 3 through the communication pipeline 205, the air passing through the baffle plates 204 enters the air slot cover 207 through the rectangular grooves of the air slot plate 206, is guided out from the upper and lower grooves of the air slot cover 207 under the limitation of an inner sliding plate 208, passes through rock wool plates 209, is filtered by the rock wool plates 209, and is finally guided into the air inlet of the diesel engine 3 through the communication pipeline 205, the inner wall of the air slot cover 207 is slidably provided with the inner sliding plate 208, the upper and lower sides of the air slot cover 207 are provided with grooves, the upper and lower sides of the air slot cover 207 are provided with plate grooves, and the plate grooves of the air slot cover 207 are fixedly provided with the rock wool plates 209.

[0041] The inner slide plate 208 is fixedly installed with a guide rod 210 at both ends away from the hollow groove plate 206, one end of the guide rod 210 away from the inner slide plate 208 penetrates through the hollow groove cover 207 and extends to the other side, a rubber gasket ring 211 is clamped between the inner slide plate 208 and the hollow groove cover 207, and the rubber gasket ring 211 is located outside the guide rod 210.

[0042] The second embodiment is based on the first embodiment, please refer to Figures 4 to 5 As shown in the figure, the exhaust mechanism 8 includes a connecting pipe 81, one end of the connecting pipe 81 is fixedly connected with the exhaust port of the diesel engine 3, and the other end of the connecting pipe 81 away from the diesel engine 3 is curved upward, the other end of the connecting pipe 81 away from the diesel engine 3 is fixedly installed with a silencer 82, the top of the silencer 82 is fixedly installed with a guide pipe 83, the exhaust gas is introduced into the connecting pipe 81 through the exhaust port, and flows in the connecting pipe 81, and is guided by the partition plate 84 during the flowing process, so that the exhaust gas passes over the drain hole 85 under the guidance of the partition plate 84, and enters the silencer 82 along the upward bending of the connecting pipe 81, and is finally guided out by the guide pipe 83, the partition plate 84 is fixedly installed at the end of the connecting pipe 81 close to the diesel engine 3, the other end of the partition plate 84 away from the diesel engine 3 is inclined upward, and the drain hole 85 is uniformly arranged at the bottom of the connecting pipe 81.

[0043] The third embodiment is based on the first and second embodiments, please refer to Figures 6 to 8 As shown in the figure, the oil filtering mechanism 6 includes an oil tank 61, the top of the oil tank 61 is fixedly installed with an oil inlet pipe 62, the bottom of the oil tank 61 close to the oil pump 7 is provided with a guide pipe, and the oil tank 61 is fixedly connected with the oil inlet of the oil pump 7 through the guide pipe, the inner wall of the oil tank 61 is fixedly installed with a through groove plate 66, and the outer side of the through groove plate 66 is uniformly provided with a through groove, the diesel oil is poured into the oil tank 61 through the oil inlet pipe 62, the diesel oil in the oil tank 61 is connected with the oil inlet of the oil pump 7 through the guide pipe, and is guided into the diesel engine 3 through the oil pump 7, so as to provide diesel oil for the diesel engine 3, the bottom of the through groove plate 66 is inclined away from the guide pipe, the top of the through groove plate 66 is provided with a rectangular groove, the filter plate 65 is fixedly installed at the rectangular groove of the through groove plate 66, the inner partition plate 63 is fixedly installed at the bottom of the through groove plate 66, and the bottom of the inner partition plate 63 is fixedly connected with the inner wall of the oil tank 61.

[0044] The inner wall of the oil tank 61 is fixedly provided with a flow guide plate 64, the bottom of the flow guide plate 64 is inclined to one side of the inner partition plate 63, the flow guide plate 64 is located below the through slot plate 66, the bottom of the flow guide plate 64 is fixedly provided with a missing slot plate 67, diesel oil introduced into the oil tank 61 first contacts the filter plate 65 on the top of the through slot plate 66, and impurities are filtered out through the filter plate 65, so that the diesel oil passes through the filter plate 65 and the through slot plate 66 into the space between the through slot plate 66 and the flow guide plate 64, then under the guidance of the flow guide plate 64, enters the space between the flow guide frame 69 and the missing slot plate 67, the impurities blocked by the filter plate 65 are driven by the flow of diesel oil to flow into the space between the inner partition plate 63 and the oil tank 61 along the inclination of the filter plate 65, the diesel oil between the flow guide frame 69 and the missing slot plate 67 flows from top to bottom, passes through the gap between the magnetic rods 68, and finally is guided out of the missing slot of the missing slot plate 67, and finally is guided out of the missing slot of the missing slot plate 67, and finally is guided out of the missing slot of the missing slot plate 67. The bottom of the missing slot plate 67 is uniformly provided with a missing slot, the bottom of the through slot plate 66 close to the flow guide plate 64 is fixedly provided with a flow guide frame 69, the inner wall of the flow guide frame 69 is fixedly provided with magnetic rods 68, and the magnetic rods 68 are uniformly and staggeredly arranged in the flow guide frame 69 from top to bottom.

[0045] In use, the diesel engine 3 is started, the oil pump 7 guides the diesel oil in the oil filtering mechanism 6 into the diesel engine 3, the external air enters the diesel engine 3 through the filtering of the air inlet mechanism 2, the exhaust gas generated by the operation of the diesel engine 3 is guided out through the exhaust mechanism 8, and at the same time, the generator 5 is driven to operate in the process that the diesel engine 3 operates, so that the generator 5 converts mechanical energy into electrical energy, and transmits the electrical energy to the frequency conversion unit 4 through electrical connection with the frequency conversion unit 4, and processes the electrical energy through the frequency conversion unit 4 and outputs the electrical energy outward.

[0046] In the air inlet mechanism 2, when the diesel engine 3 works, the external air passes through the mesh cover 202 into the air inlet box 201, then the air passes through the louver plate 204 in the connecting frame 203, at the same time, when working outdoors in rainy days, the rainwater brought into the inside of the air inlet box 201 by the air flow is blocked by the louver plate 204, and at the same time, the louver plate 204 is inclined downward from inside to outside, so that the rainwater blocked by the louver plate 204 is guided to the space between the connecting frame 203 and the mesh cover 202 along the louver plate 204, and finally is guided out of the through slot at the bottom of the air inlet box 201, the air passing through the louver plate 204 enters the air slot cover 207 through the matrix slot of the air slot plate 206, then is guided out of the air slot cover 207 from the strip slot on the upper and lower sides of the air slot cover 207 under the limitation of the inner sliding plate 208, and passes through the rock wool plate 209, the air is filtered through the rock wool plate 209, and finally is guided into the air inlet of the diesel engine 3 through the communication pipe 205.

[0047] When the diesel engine 3 exhausts exhaust gas, the exhaust gas is introduced into the connecting pipe 81 through the exhaust port, and flows in the connecting pipe 81, and is guided by the partition plate 84 during the flow, so that the exhaust gas passes over the drain hole 85 under the guidance of the partition plate 84, and flows along the upward bending of the connecting pipe 81 into the muffler 82, and is finally guided out by the guide-out pipe 83, and at the same time, when working outdoors in rainy days, after the rainwater enters along the guide-out pipe 83, it seeps downward, and after entering the connecting pipe 81, it is guided out along the drain hole 85 by the bending of the connecting pipe 81 and the cooperation of the partition plate 84.

[0048] In the oil filtering mechanism 6, diesel oil is poured into the oil tank 61 through the oil inlet pipe 62, and the diesel oil in the oil tank 61 is connected with the liquid inlet of the oil pump 7 through a guide pipe, and is guided into the diesel engine 3 by the oil pump 7, and the diesel oil in the oil tank 61 is first contacted with the filter plate 65 on the top of the through-slot plate 66, and the impurities are filtered out by the filter plate 65, so that the diesel oil passes through the filter plate 65 and the through-slot plate 66 into the space between the through-slot plate 66 and the flow guide plate 64, and then under the guidance of the flow guide plate 64, it enters between the flow guide frame 69 and the missing-slot plate 67, and the impurities blocked by the filter plate 65 flow into the space between the inner partition plate 63 and the oil tank 61 under the flow of the diesel oil along the inclination of the filter plate 65, and the diesel oil between the flow guide frame 69 and the missing-slot plate 67 flows from top to bottom, passes through the gap between the magnetic rods 68, and is finally guided out from the missing slots of the missing-slot plate 67, and is finally guided out by the guide pipe.

[0049] It is to be understood that the terminology used herein such as first and second, and the like, is merely for distinguishing one entity or action from another entity or action that is discussed, and is not necessarily intended to, nor should be construed to, imply that such entities or actions are necessarily related in any way or that one precedes the other. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. In other words, any process, method, article, or apparatus that comprises a list of elements is comprised of those elements, but is not limited to only those elements, and can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0050] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the spirit and scope of the application, which are defined by the appended claims and their equivalents.

Claims

1. A rain and dust proof small-sized diesel frequency conversion generator set, characterized in that, Include: The frame (1), the inside installation of diesel engine (3) and generator (5), the output shaft of diesel engine (3) and the input shaft of generator (5) are fixedly connected through the shaft coupling, the inside installation of frequency conversion unit (4) in frame (1), the electrical connection between frequency conversion unit (4) and generator (5); Air inlet mechanism (2) and exhaust mechanism (8), the exhaust mechanism (8) is installed at the exhaust port of diesel engine (3), the air inlet mechanism (2) is connected with the air inlet of diesel engine (3); Oil filter mechanism (6) and oil pump (7), the inlet of oil pump (7) is connected with oil filter mechanism (6), and the outlet of oil pump (7) is communicated with the oil circuit pipeline of diesel engine (3) through pipeline; Wherein, the air inlet mechanism (2) includes air inlet box (201), the inner wall of air inlet box (201) is fixedly installed with connecting frame (203), the inner wall of connecting frame (203) is fixedly installed with louver (204), the louver (204) is evenly installed in the inside of connecting frame (203) from top to bottom, and the louver (204) is inclined downward from inside to outside, the outer side of air inlet box (201) is fixedly installed with mesh cover (202), the bottom of both sides of air inlet box (201) is provided with through slot, and the through slot is located between connecting frame (203) and mesh cover (202); The oil filter mechanism (6) includes oil tank (61), the top of oil tank (61) is fixedly installed with oil inlet pipe (62), the bottom of oil tank (61) near oil pump (7) is provided with conduit, and the oil tank (61) is fixedly connected with the oil inlet of oil pump (7) through the conduit; The inner wall of oil tank (61) is fixedly installed with through slot plate (66), the outer side of through slot plate (66) is evenly provided with through slot, and the bottom of through slot plate (66) is inclined to the side away from the conduit, the top of through slot plate (66) is provided with rectangular slot, and the rectangular slot of through slot plate (66) is fixedly installed with filter plate (65), the bottom of through slot plate (66) is fixedly installed with inner partition plate (63), and the bottom of inner partition plate (63) is fixedly connected with the bottom of the inner wall of oil tank (61).

2. The rain and dust proof small-sized diesel variable frequency generator set according to claim 1, characterized in that: The inner wall of air inlet box (201) is fixedly installed with hollow slot plate (206), the outer side of hollow slot plate (206) is evenly provided with rectangular slot, the side of hollow slot plate (206) away from connecting frame (203) is fixedly installed with hollow slot cover (207), the rectangular slot of hollow slot cover (207) and hollow slot plate (206) correspond one by one, the side of air inlet box (201) near diesel engine (3) is fixedly installed with communication pipe (205), and the air inlet box (201) is fixedly connected with the air inlet of diesel engine (3) through communication pipe (205).

3. The rain and dust proof small-sized diesel variable frequency generator set according to claim 2, characterized in that: The inner wall of hollow slot cover (207) is slidably installed with inner sliding plate (208), the upper and lower sides of hollow slot cover (207) are provided with strip slot, and the upper and lower sides of hollow slot cover (207) are provided with plate slot, and the plate slot of hollow slot cover (207) is fixedly installed with rock wool board (209).

4. The rain and dust proof small-sized diesel variable frequency generator set according to claim 3, characterized in that: The inner slide plate (208) is fixedly installed with guide rods (210) at both ends away from the hollow groove plate (206), one end of the guide rod (210) away from the inner slide plate (208) penetrates through the hollow groove cover (207) and extends to the other side, the inner slide plate (208) and the hollow groove cover (207) are clamped with rubber pad rings (211), and the rubber pad rings (211) are located outside the guide rods (210).

5. The rain and dust proof small-sized diesel variable frequency generator set according to claim 1, characterized in that: The exhaust mechanism (8) comprises a connecting pipe (81), one end of the connecting pipe (81) is fixedly connected with the exhaust port of the diesel engine (3), the other end of the connecting pipe (81) away from the diesel engine (3) is curved upward, the other end of the connecting pipe (81) away from the diesel engine (3) is fixedly installed with a silencer (82), and the top of the silencer (82) is fixedly installed with a lead-out pipe (83).

6. The rain and dust proof small-sized diesel variable frequency generator set according to claim 5, characterized in that: The connecting pipe (81) is fixedly installed with a partition plate (84) inside and close to one end of the diesel engine (3), one end of the partition plate (84) away from the diesel engine (3) is inclined upward, the bottom of the connecting pipe (81) is uniformly provided with drain holes (85), and the drain holes (85) are located below the partition plate (84).

7. The rain and dust proof small-sized diesel variable frequency generator set according to claim 1, characterized in that: The inner wall of the oil tank (61) is fixedly installed with a guide plate (64), the bottom of the guide plate (64) is inclined to the side of the inner partition plate (63), the guide plate (64) is located below the through groove plate (66), the bottom of the guide plate (64) is fixedly installed with a notched groove plate (67), and the bottom of the notched groove plate (67) is uniformly provided with notched grooves.

8. The rain and dust proof small-sized diesel variable frequency generator set according to claim 7, characterized in that: The bottom of the through groove plate (66) close to the guide plate (64) is fixedly installed with a guide frame (69), the inner wall of the guide frame (69) is fixedly installed with a magnetic bar (68), and the magnetic bar (68) is uniformly and staggeredly installed from top to bottom in the guide frame (69).

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