Self-cleaning energy-saving diesel generating set

Abstract

The invention discloses a self-cleaning energy-saving diesel generating set which comprises a base, and the base is provided with a diesel engine with a heat exchange inlet and a heat exchange outlet; the generator is provided with a cooling inlet and a cooling outlet, and the cooling outlet communicates with the heat exchange inlet; an oil supply assembly; the liquid cooling assembly comprises an upper cold box, a heat exchange tube and a lower cold box which are sequentially communicated from top to bottom; the liquid cooling assembly further comprises a spraying assembly. And the water collecting tank communicates with the lower cold box, and a filtering piece is detachably connected into the water collecting tank. According to the self-cleaning energy-saving diesel generating set, part of cooling water in the upper cold box is sprayed to the heat exchange pipe through the spraying assembly and is received and filtered through the water collecting tank, cleaning of the heat exchange pipe is achieved, dust and impurities are prevented from being attached to the heat exchange pipe to cause increase of heat resistance, meanwhile, the cooling water outside the heat exchange pipe makes contact with outside air for heat exchange, and the heat exchange efficiency is improved. The power consumption required by cooling is saved, the cooling and heat exchange effects are improved, and the stable cooling effect on the diesel engine and the generator is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel generators, and more particularly to a self-cleaning energy-saving diesel generator set. Background Art

[0002] A diesel generator set is a complete set of equipment that uses a diesel engine as the main power to drive the generator to generate electricity. It is mainly used in scenarios such as standby power supply, temporary power supply, or independent power supply. Its core function is to convert the chemical energy of diesel into electrical energy, providing stable power support for multiple fields such as industry, commerce, medical care, and communication.

[0003] During the use of a diesel generator set, in order to facilitate the heat dissipation of the diesel engine and the generator, it is necessary to ventilate and dissipate heat around the diesel generator set. During the ventilation and heat dissipation process, due to the flow of air around, it is easy to drive the flow of dust and impurities in the surrounding environment and attach them to the surface of the heat exchange tubes of the cooling system. Even if a filter screen is installed at the air inlet of the cooling system of the diesel generator set to achieve a certain degree of dust prevention, there will still be some fine particles passing through the mesh holes of the filter screen and attaching to the heat exchange tubes of the liquid cooling system, hindering the heat exchange between the coolant in the heat exchange tubes and the outside air, resulting in a decrease in the cooling effect of the coolant and an increase in thermal resistance. It is necessary to increase the number of circulating flows of the coolant to achieve the corresponding cooling effect, thereby increasing the power consumption for cooling; moreover, for the filter screen at the ventilation opening of the liquid cooling system of the existing diesel generator, the denser the mesh distribution and the smaller the aperture, although it can enhance the interception ability of dust in the air and ensure the long-term cleanliness of the heat exchange tubes, the corresponding ventilation ability decreases, and the power consumption during the operation of the fan also increases accordingly; on the contrary, the sparser the mesh distribution and the larger the aperture, although it helps to ventilate and dissipate heat of the heat exchange tubes in the short term to enhance the cooling and cooling effect of the coolant, dust is also easy to attach to the wall of the heat exchange tubes, resulting in an increase in thermal resistance and a gradual decrease in heat exchange efficiency as the use time increases. The increase in the number of flows of the cooling water will also lead to an increase in the power consumption during the operation of the device.

[0004] Therefore, it is necessary to improve the self-cleaning energy-saving diesel generator set in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects existing in the prior art and provide a self-cleaning energy-saving diesel generator set that cleans the heat exchange tubes to ensure a long-term stable heat exchange and cooling effect and reduces the power consumption for cooling.

[0006] To achieve the above technical effects, the technical solution of the present invention is: a self-cleaning energy-saving diesel generator set, including a base, and provided on the base are:

[0007] A diesel engine, having a combustion-supporting inlet, an exhaust gas outlet, an oil inlet, a heat exchange inlet, and a heat exchange outlet;

[0008] A generator, having a cooling inlet and a cooling outlet, wherein the output end of the diesel engine is connected to the input end of the generator, and the cooling outlet is communicated with the heat exchange inlet;

[0009] An oil supply assembly for delivering diesel oil to the oil inlet;

[0010] A liquid cooling assembly, including an upper cooling box, a heat exchange tube and a lower cooling box which are communicated with each other from top to bottom in sequence. The lower cooling box is communicated with the cooling inlet through a cooling pump, and the heat exchange outlet is communicated with the upper cooling box;

[0011] The liquid cooling assembly further includes:

[0012] A spraying assembly, the top of which is communicated with the upper cooling box, the bottom of which is located above the heat exchange tube and is provided with nozzles facing the heat exchange tube;

[0013] A water collecting tank, which is located between the lower cooling box and the heat exchange tube and the bottom of which is communicated with the lower cooling box. The projections of the heat exchange tube and the spraying assembly on the horizontal plane are both located within the projection of the water collecting tank on the horizontal plane. A filter element covering the connection between the water collecting tank and the lower cooling box is detachably connected in the water collecting tank.

[0014] Preferably, in order to further promote the heat exchange effect, the liquid cooling assembly further includes an air cooling assembly. The air cooling assembly includes an air cooling frame fixed between the upper cooling box and the lower cooling box. The spraying assembly and the water collecting tank are both located within the air cooling frame. Air inlets and air outlets are respectively arranged on two opposite sides of the air cooling frame facing each other, and a fan and a primary filter screen are connected to the air inlet.

[0015] Preferably, in order to facilitate the disassembly and assembly of the filter element and the water collecting tank, the filter element is in plug-in fit with the water collecting tank in the horizontal direction. The air cooling frame includes a fixed frame, a movable frame movably connected to the fixed frame and a locking member for locking the movable frame to the fixed frame. In the locked state, the movable frame faces and abuts against the filter element along the plugging direction of the filter element.

[0016] Preferably, in order to fasten the filter element by locking the movable frame, a notch is arranged on one side of the fixed frame, and the notch is adapted to the movable frame. An insertion opening is arranged on one side of the water collecting tank facing the notch. The filter element includes an insertion plate adapted to the insertion opening and a filter frame fixed to one side of the insertion plate. The filter frame is in sealed fit with the circumferential inner wall of the water collecting tank and a collecting filter screen is arranged inside.

[0017] Preferably, in order to ensure the tight assembly of the water collecting tank and prevent impurities in the water collecting tank from entering the cold water tank, a support member is arranged in the water collecting tank, and the support member is in contact with the bottom surface of the filter frame.

[0018] Preferably, for facilitating the locking connection between the movable frame and the fixed frame, the movable frame rotates on the fixed frame and the rotation axis extends along the vertical direction. An activity sleeve and a fixed sleeve both extending along the vertical direction are respectively arranged on the movable frame and the fixed frame. The locking member is a locking pin, and the activity sleeve and the fixed sleeve are in plug-in fit through the locking pin.

[0019] Preferably, for enhancing the cleaning effect and the heat exchange effect, the heat exchange tube includes a plurality of serpentine tubes distributed along the vertical direction and sequentially communicated. The liquid cooling assembly further includes a filter washing assembly. The filter washing assembly includes a replacement unit and a filter washing layer arranged horizontally and corresponding to the lower side of each serpentine tube one by one. The replacement unit is used for replacing the positions of two sides of the filter washing layer.

[0020] Preferably, for facilitating the replacement of the positions of two sides of the filter washing layer and enhancing the heat exchange effect at the same time, the filter washing layer is a closed-loop filter cloth. Along the width direction of the filter cloth, the projection shape of the filter cloth is an oval. The replacement unit drives the filter washing layer to rotate along its circumferential direction.

[0021] Preferably, for preventing the filter cloth from deforming, the replacement unit includes a driving unit and a shaping unit distributed at intervals along the width direction of the filter cloth in the reverse direction. The shaping unit includes a closed-loop rubber belt and rotating wheels arranged at both ends of the rubber belt and in transmission connection. The outer circumference of the rubber belt is fixedly connected with the inner wall of the filter cloth in the circumferential direction. The driving unit drives the rotating wheels to rotate.

[0022] Preferably, for enhancing the heat exchange effect and ensuring that the water flow in the upper cold box can uniformly act on the serpentine tube at the topmost part to clean the serpentine tube, the serpentine tube includes a plurality of heat exchange straight tubes arranged side by side along the horizontal direction. The spraying assembly includes a plurality of branch pipes arranged side by side along the horizontal direction. The branch pipes are respectively arranged corresponding to the lower sides of the heat exchange straight tubes. The nozzles are distributed at intervals along the axial direction of the branch pipes at the bottom of the branch pipes.

[0023] In summary, compared with the prior art, in the self-cleaning energy-saving diesel generator set of the present invention, part of the cooling water in the upper cold box is sprayed onto the heat exchange tube through the spraying assembly and received and filtered by the water collecting tank, which not only realizes the cleaning of the heat exchange tube, avoids the increase of thermal resistance caused by dust and impurities adhering to the heat exchange tube, but also the cooling water outside the heat exchange tube exchanges heat with the outside air, saves the power consumption required for cooling and improves the cooling and heat exchange effect, and realizes a stable cooling effect on the diesel engine and the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is Figure 1 the top view of

[0026] Figure 3 is Figure 1 an explosion schematic diagram;

[0027] Figure 4 is Figure 1 an explosion schematic diagram from another perspective;

[0028] Figure 5 is a structural schematic diagram of the liquid cooling component of the present invention;

[0029] Figure 6 is Figure 5 an explosion schematic diagram;

[0030] Figure 7 is Figure 5 a sectional structure diagram;

[0031] Figure 8 is Figure 5 a sectional structure diagram from another perspective;

[0032] Figure 9 is a structural schematic diagram of the spray component of the present invention;

[0033] Figure 10 is a structural schematic diagram of the heat exchange tube of the present invention;

[0034] Figure 11 is a structural schematic diagram of the upper cold box of the present invention;

[0035] Figure 12 is a structural schematic diagram of the lower cold box of the present invention;

[0036] Figure 13 is a structural schematic diagram of the air cooling component of the present invention;

[0037] Figure 14 is Figure 13 an explosion schematic diagram;

[0038] Figure 15 is a structural schematic diagram of the filter washing component and the water collecting tank of the present invention;

[0039] Figure 16 is Figure 15 an explosion schematic diagram;

[0040] In the figure: 1. Base; 11. Positioning port; 2. Diesel engine; 21. Combustion-supporting inlet; 22. Exhaust gas outlet; 23. Fuel inlet; 24. Heat exchange inlet; 25. Heat exchange outlet; 3. Generator; 31. Cooling inlet; 32. Cooling outlet; 4. Fuel supply assembly; 41. Fuel tank; 411. Oil barrel; 412. Barrel cover; 413. Oil level observation window; 414. Oil injection pipe; 415. Oil injection plug; 42. Oil pump; 5. Liquid cooling assembly; 51. Upper cold box; 511. Upper box body; 5111. Upper observation window; 5112. Water outlet; 5113. Spraying port; 512. Upper box cover; 5121. Water injection port; 5122. Water injection plug; 5123. Return port; 5124. Steam valve; 52. Heat exchange pipe; 521. Serpentine pipe; 5211. Heat exchange straight pipe; 5212. Heat exchange elbow; 522. Connecting elbow; 523. Input pipe; 524. Output pipe; 53. Lower cold box; 531. Lower box body; 5311. Drain pipe; 5312. Drain valve; 5313. Lower observation window; 532. Lower box cover; 5321. Water inlet; 5322. Water inlet; 54. Cooling pump; 55. Spraying assembly; 551. Nozzle; 552. Branch pipe; 553. Spraying vertical pipe; 554. Spraying horizontal pipe; 555. Regulating valve; 56. Water collecting tank; 561. Filter element; 5611. Inserted plate; 5612. Filter frame; 5613. Collection filter screen; 5614. Handle; 562. Socket; 563. Support member; 564. Heat dissipation strip; 565. Drain port; 566. Enclosing frame; 57. Air cooling assembly; 571. Air cooling frame; 5711. Air inlet; 5712. Air outlet; 5713. Air inlet hood; 5714. Air outlet hood; 5715. Ventilation port; 5716. Exhaust gas ring; 5717. Exhaust pipe; 572. Fan; 573. Primary filter screen; 574. Fixed frame; 5741. Notch; 5742. Fixed sleeve; 575. Movable frame; 5751. Movable sleeve; 576. Locking member; 58. Filter washing assembly; 581. Replacement unit; 5811. Rubber belt; 5812. Rotating wheel; 5813. Motor; 5814. Concentric shaft; 582. Filter washing layer; 583. Transmission unit; 5831. Synchronous belt; 5832. Synchronous pulley; 6. Air filter; 61. Air inlet; 62. Air outlet; 63. Waste discharge port; 64. Air inlet valve; 65. Flow meter; 66. Waste discharge valve; 67. Waste collection box; 7. Storage battery. Detailed implementation manners

[0041] The following combines the accompanying drawings and embodiments to further describe the detailed implementation manners of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0042] As Figures 1 - 16 shown, the self-cleaning energy-saving diesel generator set of the present invention includes a base 1, and the following are arranged on the base 1:

[0043] A diesel engine 2, having a combustion-supporting inlet 21, an exhaust gas outlet 22, a fuel inlet 23, a heat exchange inlet 24 and a heat exchange outlet 25;

[0044] A generator 3, having a cooling inlet 31 and a cooling outlet 32, the output end of the diesel engine 2 is connected to the input end of the generator 3, and the cooling outlet 32 is communicated with the heat exchange inlet 24;

[0045] A fuel supply assembly 4, used for delivering diesel fuel to the fuel inlet 23;

[0046] A liquid cooling assembly 5, including an upper cooling box 51, a heat exchange tube 52 and a lower cooling box 53 which are communicated with each other in sequence from top to bottom, the lower cooling box 53 is communicated with the cooling inlet 31 through a cooling pump 54, and the heat exchange outlet 25 is communicated with the upper cooling box 51;

[0047] The liquid cooling assembly 5 further includes:

[0048] A spray assembly 55, the top of which is communicated with the upper cooling box 51, the bottom is located above the heat exchange tube 52 and is provided with a nozzle 551 facing the heat exchange tube 52;

[0049] A water collecting tank 56, located between the lower cooling box 53 and the heat exchange tube 52 and the bottom of which is communicated with the lower cooling box 53, the projections of the heat exchange tube 52 and the spray assembly 55 on the horizontal plane are both located within the projection of the water collecting tank 56 on the horizontal plane, and a filter element 561 covering the connection part between the water collecting tank 56 and the lower cooling box 53 is detachably connected in the water collecting tank 56.

[0050] Furthermore, the present invention further includes a storage battery 7 and an air filter 6. The storage battery 7 is connected to the generator 3 and is used for storing the electric energy generated by the generator 3, while the air filter 6 is connected to the combustion-supporting inlet 21 of the diesel engine 2, so that before the external air enters the interior of the diesel engine 2 through the combustion-supporting inlet 21, it first passes through the air filter 6 for filtration to ensure that clean air is introduced into the diesel engine 2 and prevent dust particles and impurities in the air from entering the cylinder interior of the diesel engine 2 and affecting the operation of the diesel engine 2.

[0051] The base 1 is horizontally arranged and is integrally in a cuboid plate-like structure, and is used for installing the diesel engine 2, the generator 3, the liquid cooling assembly 5, the fuel supply assembly 4, the storage battery 7 and the air filter 6. In order to ensure the compactness of the unit structure, as Figure 1 shown in the perspective view, the diesel engine 2 and the generator 3 are distributed along the length direction of the base 1 at the right side position of the base 1, and the liquid cooling assembly 5, the storage battery 7, the fuel supply assembly 4 and the air filter 6 are distributed along the length direction of the base 1 in sequence at the left side position of the base 1. The liquid cooling assembly 5 and the generator 3 are adjacent to each other, and the storage battery 7, the fuel supply assembly 4 and the air filter 6 are adjacent to the diesel engine 2.

[0052] When the unit is in operation, after the external air is filtered by the air filter 6, it is conveyed to the inside of the cylinder of the diesel engine 2 through the combustion-supporting inlet 21. At the same time, the fuel supply assembly 4 conveys diesel oil into the diesel engine 2 through the fuel inlet 23. The diesel engine 2 is internally provided with a spraying device, which converts the liquid diesel oil into diesel oil droplets and conveys them into the cylinder to be mixed and contacted with the filtered air. Combustion occurs in the cylinder inside the diesel engine 2 to generate heat energy, driving the output shaft of the diesel engine 2 to rotate, thereby generating mechanical energy. The waste gas generated by the combustion of the diesel oil droplets and air is discharged through the waste gas outlet 22. The output shaft of the diesel engine 2 drives the rotor of the generator 3 to rotate. Through the generator 3, the chemical energy of diesel oil and air is converted into heat energy through combustion, then the heat energy is converted into the mechanical energy of the rotation of the crankshaft of the diesel engine 2, and finally the mechanical energy is converted into electrical energy.

[0053] The specific structures of the fuel supply assembly 4 and the air filter 6 can be referred to Figures 1 - 4 , where the fuel supply assembly 4 includes a fuel tank 41 and a fuel pump 42. Further specifically, the fuel tank 41 includes an oil barrel 411 with an open top and fixed on the base 1. The top of the oil barrel 411 is fixedly covered with a barrel cover 412. A fuel injection pipe 414 that communicates with the inner cavity of the oil barrel 411 and extends upward is provided on the barrel cover 412. A fuel injection plug 415 is threadedly connected to the fuel injection pipe 414. Diesel oil can be conveniently added into the oil barrel 411 through the fuel injection pipe 414, and the fuel injection plug 415 is convenient for sealing the fuel injection pipe 414 to prevent external impurities from entering the oil barrel 411 through the fuel injection pipe 414 and affecting the quality of the diesel oil inside the fuel tank 41. An oil level observation window 413 is provided on the side wall of the oil barrel 411 to facilitate observing the remaining amount of diesel oil in the fuel tank 41. The input end of the fuel pump 42 penetrates through the barrel cover 412 in a sealed manner and extends downward into the oil barrel 411, and the output end communicates with the fuel inlet 23. The diesel oil in the oil barrel 411 is conveyed into the diesel engine 2 for combustion through the fuel pump 42.

[0054] An air inlet 61 is provided on the side wall of the air filter 6, an air outlet 62 is provided on the top, a waste discharge port 63 is provided at the bottom, and a filter element with a vibration device (not shown in the figure) is provided inside. The air filter 6 is fixed above the base 1 through four feet. The air inlet 61 is connected with an air inlet valve 64 and communicates with the outside. The air outlet 62 is connected with a flow meter 65 and communicates with the combustion-supporting inlet 21. The waste discharge port 63 is connected with a waste discharge valve 66 and a waste collection box 67 with an open top is provided directly below. A positioning port 11 that is inserted and matched with the waste collection box 67 is provided on the top surface of the base 1.

[0055] When the device is running, the intake valve 64 is opened, and external air enters the air filter 6 through the intake port 61. The impurities in the air are filtered out by the filter element, causing the impurities to accumulate on the filter element and the bottom inside the air filter 6. The clean air passes through the filter element and is discharged from the air outlet 62, and then enters the diesel engine 2 through the combustion support inlet 21. The flowmeter 65 is used to detect the flow rate of the air outlet 62. When the flowmeter 65 detects that the air flow rate drops below the preset range, it indicates that there are more dust particles accumulated on the filter element, which is likely to cause the filter element to be blocked and reduce the air flow rate. At this time, the waste discharge valve 66 is opened, and the vibration device is started to shake off the dust particles accumulated on the filter element. The dust particles fall with the dust particles at the bottom of the air filter 6 and are discharged from the waste discharge port 63, and the discharged impurities are collected by the waste collection box 67. The staff can regularly take out the impurities collected by the waste collection box 67. After cleaning the waste collection box 67, the waste collection box 67 can be accurately placed directly below the waste discharge port 63 through the positioning port 11. The positioning port 11 can also prevent the horizontal position of the waste collection box 67 from shifting.

[0056] When the diesel engine 2 and the generator 3 are running, heat energy is generated due to air combustion and rotor rotation. The liquid cooling component 5 can also cool down the diesel engine 2 and the generator 3 to ensure the normal operation of the diesel engine 2 and the generator 3 and extend their service lives. When the liquid cooling component 5 conducts the cooling treatment, the cooling pump 54 extracts the coolant (usually cooling water) in the lower cold box 53. The cooling water enters the generator 3 through the cooling inlet 31 and is discharged from the cooling outlet 32. During the flowing process, the cooling water first exchanges heat with the generator 3 to cool down the generator 3. After the cooling water is discharged from the cooling outlet 32, it then enters the diesel engine 2 through the heat exchange inlet 24 and exchanges heat with the diesel engine 2 to cool down the diesel engine 2. The heated cooling water is discharged from the heat exchange outlet 25 and then enters the upper cold box 51 and flows downward. Through the heat exchange tube 52, when the high-temperature cooling water passes through the heat exchange tube 52, it exchanges heat with the external air, causing the cooling water to cool down and then enter the lower cold box 53, where it is pumped away by the cooling pump 54 and is transported through the cooling pump 54 to pass through the generator 3 and the diesel engine 2 in sequence. In this way, through the circulating flow of the cooling water, the generator 3 and the diesel engine 2 are cooled down.

[0057] In the present invention, the cooling water first passes through the generator 3 and then through the diesel engine 2, mainly because when the device is running, the diesel in the cylinder of the diesel engine 2 burns with air, generating more heat, while the heat of the generator 3 only comes from the inherent loss of energy conversion, making the temperature of the diesel engine 2 significantly higher than that of the generator 3. Therefore, the cooling water first cools down the generator 3, which has a relatively lower temperature compared to the diesel engine 2, causing the temperature rise of the cooling water to be relatively small, and then exchanges heat with the diesel engine 2 at a higher temperature.

[0058] Different from the prior art, in the present invention, a spray assembly 55 is further provided between the upper cold box 51 and the heat exchange tubes 52. During the operation of the liquid cooling assembly 5, a part of the cooling water in the upper cold box 51, in addition to entering the lower cold box 53 through the heat exchange tubes 52, also enters the spray assembly 55 and is output downward through the nozzles 551 of the spray assembly 55 and sprayed on the heat exchange tubes 52. This can not only clean the heat exchange tubes 52, avoiding the increase in thermal resistance caused by dust accumulation on the outer wall of the heat exchange tubes 52 during heat exchange, so that more flow times are required to achieve the previous cooling effect during cooling. Therefore, by flushing the dust and impurities outside the heat exchange tubes 52, the thermal resistance can be reduced, the heat exchange effect can be improved, and the power consumption for cooling the diesel engine 2 and the generator 3 can be saved. Moreover, since the temperature of the tube wall of the heat exchange tubes 52 is higher than the external temperature due to the flow of the heated cooling water inside the heat exchange tubes 52, after the cooling water flowing downward through the nozzles 551 of the spray assembly 55 falls on the heat exchange tubes 52, evaporation will occur, absorbing the heat of the heat exchange tubes 52, thereby reducing the temperature of the heat exchange tubes 52, which is beneficial to the cooling of the cooling water inside the heat exchange tubes 52.

[0059] Therefore, after the spray assembly 55 sprays the cooling water on the heat exchange tubes 52, it can not only clean the heat exchange tubes 52, remove the dust and impurities on the surface, reduce the thermal resistance, save the power consumption for cooling the cooling water, and achieve energy conservation, but also promote the cooling of the internal cooling water; after a part of the cooling water in the heat exchange tubes 52 evaporates, the other part falls, driving the dust particles to fall into the water collecting tank 56. By receiving the downward flowing cooling water through the water collecting tank 56 and filtering the cooling water by the filter element 561, the dust and impurities are intercepted on the filter element 561, and the clean cooling water enters the lower cold box 53 and is mixed with the cooling water passing through the heat exchange tubes 52 and then pumped away by the cooling pump 54 for cooling the diesel engine 2 and the generator 3. After the equipment has been running for a period of time, the filter element 561 is removed from the water collecting tank 56, the filter element 561 is cleaned to remove the accumulated impurities on the filter element 561, and then the filter element 561 is installed on the water collecting tank 56 and can be reused.

[0060] In the present invention, both the upper cold box 51 and the lower cold box 53 are rectangular parallelepiped structures. The length directions of both are parallel to the width direction of the base 1, and the width directions of both are parallel to the length direction of the base 1, as Figures 5 - 8 and Figure 11As shown in the figure, the upper cold box 51 includes an upper box body 511 with an open top. An upper box cover 512 is fixedly installed on the upper box body 511. A water injection port 5121 is provided on the upper box cover 512 to facilitate the replenishment of cooling water into the upper box body 511. The water injection port 5121 is threadedly connected with a water injection plug 5122. During use, the water injection plug 5122 is screwed into the water injection port 5121 to prevent external impurities from entering the upper cold box 51 and affecting the cooling effect of the cooling water. A return port 5123 and a steam valve 5124 are also provided on the upper box cover 512. Among them, the return port 5123 is communicated with the heat exchange outlet 25, so that the cooling water passing through the diesel engine 2 can enter the upper cold box 51 through the return port 5123, and the steam valve 5124 can ensure the stable air pressure of the upper cold box 51, thereby ensuring the safe use of the upper cold box 51. An upper observation window 5111 is provided on the side wall of the upper cold box 51 facing away from the battery 7 to facilitate observing the remaining cooling water volume in the upper box body 511. The bottom is provided with a water outlet 5112 and a spray port 5113. The water outlet 5112 is communicated with the heat exchange pipe 52, and the spray port 5113 is connected with the spray assembly 55.

[0061] As Figures 6 - 8 and Figure 11 shown in the figure, the lower cold box 53 includes a lower box body 531 with an open top and fixed above the base 1, and a lower box cover 532 fixedly installed on the lower box body 531. A water inlet 5321 and a water falling port 5322 are provided on the lower box cover 532. The water inlet 5321 is communicated with the heat exchange pipe 52. The water falling port 5322 is communicated with the bottom of the water collection tank 56. A lower observation window 5313 is provided on the side wall of the lower box body 531 facing away from the battery 7 to facilitate observing the remaining cooling water volume in the lower box body 531. The bottom is communicated with the input end of the cooling pump 54 through a drain pipe 5311. A drain valve 5312 is provided on the drain pipe 5311. During the operation of the device, the drain valve 5312 is opened to facilitate the cooling pump 54 to extract the cooling water in the lower cold box 53 to cool the diesel engine 2 and the generator 3.

[0062] A further improvement is that the liquid cooling component 5 further includes an air cooling component 57. The air cooling component 57 includes an air cooling frame 571 fixed between the upper cold box 51 and the lower cold box 53. The spray assembly 55 and the water collection tank 56 are both located inside the air cooling frame 571. Air inlet openings 5711 and air outlet openings 5712 are respectively provided on the two opposite sides of the air cooling frame 571, and a fan 572 and a primary filter screen 573 are connected to the air inlet opening 5711.

[0063] By setting up the air-cooling component 57, when the device is running, the fan 572 starts synchronously. Part of the dust and impurities in the external air are filtered out by the primary filter screen 573, enabling the air to enter the inner side of the air-cooling frame 571. The air flows and contacts the heat exchange tubes 52 and the cooling water on the heat exchange tubes 52, accelerating the evaporation and cooling of the cooling water, thereby promoting the cooling of the cooling water inside the heat exchange tubes 52 to improve the cooling effect on the diesel engine 2 and the generator 3. After heat exchange, the air is discharged from the air outlet 5712.

[0064] Specifically, as Figures 5 - 7 、 Figure 13 and Figure 14 shown, in the air-cooling component 57, the air-cooling frame 571 is vertically arranged, and the top and bottom are respectively fixedly connected to the upper box body 511 and the lower box cover 532. The length direction is parallel to the width direction of the base 1, and the width direction is parallel to the length direction of the base 1. The air inlet 5711 is arranged on the side of the air-cooling frame 571 facing away from the battery 7, and the air outlet 5712 is arranged on the side of the air-cooling frame 571 close to the battery 7. An air inlet hood 5713 and an air outlet hood 5714 are respectively fixedly connected to the air inlet 5711 and the air outlet 5712. The air inlet hood 5713 has a channel structure, and a primary filter screen 573 is threadedly connected to the end far from the air-cooling frame 571, facilitating the removal of the primary filter screen 573 for cleaning after a period of use and then reinstalling it on the air inlet hood 5713; the end of the air outlet hood 5714 far from the air-cooling frame 571 is fixedly communicated with a horizontally axial guiding barrel. The end of the guiding barrel far from the air-cooling frame 571 is closed, and an air vent 5715 is arranged on the side wall of the guiding barrel. An air outlet ring 5716 is sleeved and fixedly connected to the outside of the guiding barrel, and an air outlet pipe 5717 with a horizontally axial direction is fixedly connected to the air outlet ring 5716. A guiding cavity is formed by enclosing the guiding barrel and the air outlet ring 5716, and the air outlet pipe 5717 is communicated with the guiding cavity.

[0065] After the fan 572 starts, a small amount of dust and impurities can be filtered out through the primary filter screen 573, enabling the air to enter the air-cooling frame 571, contact the heat exchange tubes 52 and the cooling water on the heat exchange tubes 52. Through heat exchange, the cooling of the cooling water is promoted. After the air is heated, it enters the guiding barrel through the air outlet 5712 and is discharged from the air vent 5715. After entering the guiding cavity, it is then discharged from the air outlet pipe 5717.

[0066] A further improvement is that the filter element 561 is inserted and fitted with the water collecting tank 56 in the horizontal direction. The air-cooling frame 571 includes a fixed frame 574, a movable frame 575 movably connected to the fixed frame 574, and a locking member 576 for locking the movable frame 575 to the fixed frame 574. In the locked state, the movable frame 575 faces and abuts against the filter element 561 along the insertion direction of the filter element 561. A notch 5741 is provided on one side of the fixed frame 574, and the notch 5741 is adapted to the movable frame 575. A socket 562 is provided on the side of the water collecting tank 56 facing the notch 5741. The filter element 561 includes a plug board 5611 adapted to the socket 562 and a filter frame 5612 fixed to one side of the plug board 5611. The filter frame 5612 is hermetically attached to the circumferential inner wall of the water collecting tank 56 and a collecting filter screen 5613 is provided inside.

[0067] After adopting the above structure, after releasing the locking of the movable frame 575 by the locking member 576, it is convenient for the movable frame 575 to move, so as to take out the filter element 561 on the water collecting tank 56, remove the accumulated impurities on the filter element 561, and then after installing the filter element 561 on the water collecting tank 56, while locking the movable frame 575 to the fixed frame 574 by the locking member 576 to form the air-cooling frame 571, the movable frame 575 abuts against the filter element 561 to prevent the position of the filter element 561 from loosening, so that a gap for impurities to pass through is generated between the filter element 561 and the water collecting tank 56, affecting the filtering effect, and further affecting the cooling effect of the later cooling water on the diesel engine 2 and the generator 3.

[0068] A further improvement is that the movable frame 575 rotates on the fixed frame 574 and the rotation axis extends in the vertical direction. An activity sleeve 5751 and a fixed sleeve 5742 both extending in the vertical direction are respectively provided on the movable frame 575 and the fixed frame 574. The locking member 576 is a locking pin, and the activity sleeve 5751 and the fixed sleeve 5742 are inserted and fitted through the locking pin. A support member 563 is provided in the water collecting tank 56, and the support member 563 is attached to the bottom surface of the filter frame 5612.

[0069] Specifically, such as Figures 5 - 8 、 Figure 13 and Figure 14As shown, the fixed frame 574 in the air-cooled frame 571 is fixed between the upper box body 511 and the lower box cover 532. The notch 5741 is provided at the bottom of the fixed frame 574 and on the side of the fixed frame 574 facing away from the storage battery 7. The projection of the notch 5741 on the horizontal plane is U-shaped. The notch 5741, the air inlet 5711, and the air outlet 5712 are all provided on the fixed frame 574. The notch 5741 is located below the air inlet 5711. One end of the notch 5741 is provided with a rotating seat, and the other end is provided with a fixed sleeve 5742. The movable frame 575 is generally U-shaped. One end of the movable frame 575 is rotatably connected to the fixed frame 574 through the rotating seat, and the rotation axis extends in the vertical direction. The other end of the movable frame 575 is fixed with a movable sleeve 5751. The movable sleeve 5751 and the fixed sleeve 5742 are inserted and matched through a locking pin extending in the vertical direction. The notch 5741 faces the water collecting tank 56. The socket 562 of the water collecting tank 56 is provided on the side of the water collecting tank 56 facing away from the storage battery 7. Thus, when the movable frame 575 rotates to fill the notch 5741 of the fixed frame 574, the two are locked and connected by the locking member 576 to form the air-cooled frame 571. After pulling out the locking pin, the movable frame 575 can be rotated to expose the notch 5741 on the fixed frame 574, which is convenient for taking out the water collecting tank 56 facing the notch 5741. After cleaning the filter element 561 on the water collecting tank 56, it is reinstalled on the water collecting tank 56.

[0070] The specific structure of the water collecting tank 56 is as Figure 15 and Figure 16 shown. The socket 562 is provided on the side of the water collecting tank 56 facing away from the storage battery 7. The filter element 561 includes a plug board 5611 adapted to the socket 562. One side of the plug board 5611 is fixed with a filter frame 5612, and the other side is fixed with a handle 5614. The collection filter net 5613 is arranged inside the filter frame 5612.

[0071] The filter frame 5612 first passes through the socket 562 until the filter frame 5612 abuts against the inner wall of the water collecting tank 56, and then the plug board 5611 just fills the socket 562. Then, the movable frame 575 is rotated so that the movable sleeve 5751 on the movable frame 575 is aligned with the fixed sleeve 5742 on the fixed frame 574, and then the locking pin is inserted. At this time, the movable frame 575 abuts against the handle 5614, as Figure 7As shown, the position of the filter element 561 is locked. After unlocking the movable frame 575 and opening the notch 5741, the filter element 561 can be conveniently pulled out through the handle 5614. After cleaning, the filter frame 5612 and the collection filter screen 5613 of the filter element 561 can be conveniently installed in the water collection tank 56. The support member 563 is a horizontal U-shaped support plate, which is fixed on the inner wall of the water collection tank 56 and fits with the bottom surface of the filter frame 5612 to support the filter frame 5612 and ensure the sealing fit between the outer circumference of the filter frame 5612 and the inner wall of the water collection tank 56, preventing excessive gaps between the two and avoiding the washed dust and impurities from entering the lower cold box 53 through the gap between the two, which affects the later cooling effect of the diesel engine 2 and the generator 3. The bottom surface of the water collection tank 56 is provided with heat dissipation strips 564 arranged side by side along its length direction. The heat dissipation strips 564 are fixed above the lower box cover 532, which further facilitates the heat dissipation of the water flow in the water collection tank 56 to reduce the temperature of the cooling water and improve the cooling effect on the diesel engine 2 and the generator 3. The bottom surface of the water collection tank 56 is also provided with drain ports 565 that are fixedly communicated with the water inlet ports 5322 one by one. After the water flow in the water collection tank 56 is filtered by the collection filter screen 5613, it is discharged from the drain ports 565 out of the water collection tank 56 and enters the lower cold box 53 through the water inlet ports 5322.

[0072] A further improvement is that the heat exchange tube 52 includes a plurality of serpentine tubes 521 distributed vertically and connected in sequence. The liquid cooling assembly 5 further includes a filter washing assembly 58. The filter washing assembly 58 includes a replacement unit 581 and a filter washing layer 582 arranged directly below the serpentine tubes 521 one by one. The replacement unit 581 is used to replace the positions of the two sides of the filter washing layer 582.

[0073] Such as Figure 7 and Figure 8As shown, after multiple serpentine tubes 521 are connected in sequence to form the heat exchange tube 52, the overall length dimension of the heat exchange tube 52 is increased, the heat exchange surface area of the heat exchange tube 52 is enlarged, and the cooling effect of the cooling water after passing through the heat exchange tube 52 is improved; the filter washing assembly 58 includes a filter washing layer 582 disposed directly below the serpentine tube 521 in one-to-one correspondence. After the filter washing layer 582 is provided, when the cooling water output by the spraying assembly 55 scours and cleans the serpentine tube 521 below, the dust impurities and water flow fall on the filter washing layer 582. The impurities are intercepted above the filter washing layer 582, while the clean water flow penetrates through the filter washing layer 582 and continues to scour and clean the serpentine tube 521 below. The displacement unit 581 can displace the two sides of the filter washing layer 582, so that the side originally intercepted with impurities is transferred to the lower part, and the side filtering out clean water is transferred to the upper part. As the water flow above continues to flow downward, the water flow penetrates through and scours the side intercepted with impurities, causing the dust on this side to flow downward with the water flow, scouring the serpentine tube 521 below and driving the dust to flow, and then being intercepted on the top surface of the lower filter washing layer 582. In this way, by adjusting the two sides of the filter washing layer 582 through the displacement unit 581, the cooling water can scour and clean the filter washing layer 582 and the serpentine tube 521, and finally the scoured dust impurities are collected by the collection filter screen 5613 in the water collecting tank 56.

[0074] Moreover, by providing the filter washing layer 582, a water film is formed on the filter washing layer 582, increasing the contact area between the cooling water and the air, reducing the thermal resistance, and reducing the heat exchange power consumption. At the same time, the cooling water flowing outside the serpentine tube 521 also exchanges heat with the air through the outer wall of the heat exchange tube 52. The two-way cooling water acts together. Compared with the single cooling water inside the heat exchange tube 52 exchanging heat with the air through the tube wall, the heat dissipation area is greatly increased, thereby improving the heat dissipation efficiency and enhancing the cooling effect; and, during the downward flow of the cooling water falling on the filter washing layer 582, due to the large specific surface area of the filter washing layer 582, the water evaporation speed will be accelerated, and a large amount of heat will be absorbed during the evaporation process. Part of this heat comes from the cooling water itself, and part comes from the surrounding air, thereby further reducing the temperature of the cooling water. The cooling water flowing outside the serpentine tube 521 dissipates heat through heat conduction and convection, combined with evaporation heat dissipation, can more effectively take away the heat; in addition, the sprayed cooling water can form a water curtain, and the water flowing on the filter washing layer 582 will produce a certain disturbing effect on the surrounding air, promoting the flow of air, and cooperating with the operation of the fan 572, which is beneficial to taking away the hot air generated during the heat dissipation process and further enhancing the cooling effect.

[0075] A further improvement is that the filter washing layer 582 is a closed-loop filter cloth. Along the width direction of the filter cloth, the projected shape of the filter cloth is an oval, and the displacement unit 581 drives the filter washing layer 582 to rotate along its circumferential direction.

[0076] The width direction of the filter cloth is consistent with the width direction of the upper cold box 51. There is a gap between the upper and lower layers of the filter washing layer 582, which enables the filter washing layer 582 to have a larger specific surface area, increasing the heat exchange contact area with the air, facilitating the evaporation of the cooling water on the filter washing layer 582, enhancing the cooling effect of the cooling water, and the displacement unit 581 drives the filter washing layer 582 to rotate along its circumferential direction, facilitating the adjustment of the positions of both sides of the filter washing layer 582, so that the side that originally intercepted dust is transferred to the lower layer, and the side that originally washed the lower serpentine tube 521 through the flowing water is transferred to the upper layer to intercept dust. The upper and lower layers exchange positions and functions, and cooperate with the cooling water sprayed to flow downward to achieve continuous cleaning of the filter washing layer 582.

[0077] A further improvement is that the displacement unit 581 includes a driving unit and shaping units spaced apart along the width direction of the filter cloth. The shaping units include a closed-loop rubber belt 5811 and rotating wheels 5812 arranged at both ends of the rubber belt 5811 and drivingly connected. The outer circumferential edge of the rubber belt 5811 is fixedly connected to the circumferential inner wall of the filter cloth, and the driving unit drives the rotating wheels 5812 to rotate; the serpentine tube 521 includes a plurality of heat exchange straight tubes 5211 arranged side by side in the horizontal direction, and the spraying assembly 55 includes a plurality of branch pipes 552 arranged side by side in the horizontal direction. The branch pipes 552 are correspondingly arranged below the heat exchange straight tubes 5211, and the nozzles 551 are spaced apart along the axial direction of the branch pipes 552 and are at the bottom of the branch pipes 552.

[0078] The specific structure of the heat exchange tube 52 is as Figure 10 shown, including an input pipe 523, a serpentine tube 521, and an output pipe 524 that are sequentially connected. Among them, the top of the input pipe 523 is connected to the water outlet 5112 of the upper box body 511, and the output pipe 524 is connected to the water inlet 5321 on the lower box cover 532; the serpentine tube 521 is provided with three layers, and adjacent two layers of the serpentine tube 521 are fixedly connected through connecting elbows 522; the serpentine tube 521 includes heat exchange straight tubes 5211 arranged side by side in the length direction of the upper box body 511 and extending in the width direction of the upper box body 511, and adjacent two heat exchange straight tubes 5211 are connected through heat exchange elbows 5212. In this way, the overall length dimension of the heat exchange tube 52 is increased, the heat dissipation area is enlarged, and the cooling effect of the coolant is improved.

[0079] As Figure 9As shown, the spray assembly 55 also includes a spray vertical pipe 553 and a spray horizontal pipe 554. The spray vertical pipe 553 extends in the vertical direction, the top is connected to the spray port 5113, and is connected to a regulating valve 555, and the bottom is connected to the middle of the spray horizontal pipe 554. The spray horizontal pipe 554 extends along the length direction of the upper box body 511; the branch pipe 552 is axially parallel to the axial direction of the heat exchange straight pipe 5211, the branch pipe 552 is axially spaced along the spray horizontal pipe 554 and is connected to the spray horizontal pipe 554, the branch pipes 552 are arranged one by one directly above the heat exchange straight pipe 5211, and the nozzles 551 are evenly spaced along the axial direction of the branch pipe 552.

[0080] After adopting the above structure, the cooling water flow rate entering the spray vertical pipe 553 in the upper cold box 51 can be adjusted by the regulating valve 555. After the cooling water flows out from the spray vertical pipe 553, it enters the spray horizontal pipe 554, and then enters the branch pipe 552. It is sprayed downward evenly on the top-layer serpentine pipe 521 through the nozzle 551. Through the flow of cooling water, not only the serpentine pipe 521 is cleaned, but also it is in contact with the outside air and cooled by evaporation, so that the cooling water can enter the lower cold box 53 at a lower temperature, thereby enhancing the cooling effect on the diesel engine 2 and the generator 3.

[0081] like Figure 5 , Figure 15 and Figure 16 As shown, in the filter assembly 58, the filter layer 582 is provided with three layers, which are arranged one by one directly below the three-layer serpentine tube 521. The shaping unit is located on the inner side of the filter layer 582, and is used to support the filter layer 582, support and shape the filter layer 582, and avoid a significant change in its shape; the shaping unit includes rubber belts 5811 spaced apart along the width direction of the filter layer 582, the rubber belts 5811 are also in the shape of a closed loop waist circle, and the outer periphery is fixedly connected to the inner wall of the filter layer 582, and the material of the rubber belt 5811 is preferably chloroprene rubber or ethylene propylene rubber, these two types of rubber have excellent water resistance and corrosion resistance, and can ensure stable performance in a high humidity environment; the inner ends of the rubber belt 5811 are connected by two rotating wheels 5812, and the driving unit controls the rotating wheel 5812 to rotate, thereby driving the rubber belt 5811 to rotate along its own circumference, thereby realizing the rotation of the filter layer 582 along its own circumference, and realizing the replacement of the two layers of the filter layer 582.

[0082] More specifically, the driving unit includes a driving motor 5813, a concentric shaft 5814, and two transmission units 583. Each transmission unit 583 is disposed between two adjacent filter washing layers 582 to achieve synchronous rotation of the two filter washing layers 582. The transmission unit 583 includes a synchronous belt 5831 and two synchronous pulleys 5832. The two synchronous pulleys 5832 are drivingly connected through the synchronous belt 5831. The two synchronous pulleys 5832 are coaxially rotatably connected to the rotating wheels 5812 at the same end position of two adjacent filter washing layers 582. Thus, when one of the filter washing layers 582 rotates along its circumferential direction, it will inevitably drive the other two filter washing layers 582 to rotate synchronously.

[0083] The rotating wheels 5812 at the same end position of the filter washing layer 582 are fixedly connected coaxially through the concentric shaft 5814. The driving motor 5813 is fixed outside the fixed frame 574. Its output shaft hermetically penetrates the inner wall of the fixed frame 574 and is fixedly connected coaxially to one of the rotating wheels 5812. Thus, after the driving motor 5813 drives the rotating wheel 5812 to rotate, the filter washing layer 582 corresponding to the rotating wheel 5812 rotates, and then the synchronous rotation of the other two filter washing layers 582 is achieved.

[0084] The length direction of the water collecting tank 56 is the same as that of the upper cold box 51. Its top is open. At both ends, there are fixed surrounding frames 566 that extend upward and whose horizontal plane projection is U-shaped. The surrounding frames 566 at both ends are disposed opposite to each other. The concentric shaft 5814 rotates about its own axis on the surrounding frame 566, and the filter washing assembly 58 is located between the two surrounding frames 566, which can limit the activity range of the sprayed cooling water, make the cooling water fall centrally into the water collecting tank 56, reduce the loss of the cooling water, extend the replenishment cycle of the cooling water in the upper cold box 51, and thus reduce the work burden of relevant personnel.

[0085] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A self-cleaning energy-saving diesel generator set, comprising a base, on which is arranged: A diesel engine having a combustion-supporting inlet, an exhaust gas outlet, an oil inlet, a heat exchange inlet and a heat exchange outlet; The generator has a cooling inlet and a cooling outlet, the output end of the diesel engine is connected to the input end of the generator, and the cooling outlet is communicated with the heat exchange inlet; A fuel supply assembly, used for delivering diesel to the fuel inlet; A liquid cooling assembly, comprising an upper cold box, a heat exchange pipe and a lower cold box which are connected in sequence from top to bottom, wherein the lower cold box is connected to the cooling inlet through a cooling pump, and the heat exchange outlet is connected to the upper cold box; It is characterized in that The liquid cooling assembly also includes: A spray assembly, the top of which is connected to the upper cold box, and the bottom of which is located above the heat exchange tube and is provided with a nozzle facing the heat exchange tube; The water collecting tank is located between the lower cold box and the heat exchange tube and is connected to the lower cold box at the bottom. The projections of the heat exchange tube and the spray assembly on the horizontal plane are both located within the projection of the water collecting tank on the horizontal plane. A filter element is detachably connected to the water collecting tank to cover the connection between the water collecting tank and the lower cold box.

2. The self-cleaning energy-saving diesel generator set according to claim 1 is characterized in that: The liquid cooling component also includes an air cooling component, which includes an air cooling frame fixed between the upper cold box and the lower cold box, the spray assembly and the water collecting tank are both located in the air cooling frame, and air inlets and air outlets are respectively provided on two sides facing each other of the air cooling frame, and the air inlet is connected to a fan and a primary filter.

3. The self-cleaning energy-saving diesel generator set according to claim 2 is characterized in that: The filter element is plugged into and matched with the water collecting trough in a horizontal direction, and the air cooling frame includes a fixed frame, a movable frame movably connected to the fixed frame, and a locking member for locking the movable frame to the fixed frame. In the locked state, the movable frame is directly opposite to and abuts against the filter element along the plug-in direction of the filter element.

4. The self-cleaning energy-saving diesel generator set according to claim 3 is characterized in that: A notch is provided on one side of the fixed frame, and the notch is matched with the movable frame. A socket is provided on the side of the water collecting tank facing the notch. The filter element includes a plug plate matched with the socket and a filter frame fixed to one side of the plug plate. The filter frame is sealed with the circumferential inner wall of the water collecting tank and a collecting filter is provided on the inner side.

5. The self-cleaning energy-saving diesel generator set according to claim 4 is characterized in that: A support member is arranged in the water collecting tank, and the support member is fitted with the bottom surface of the filter frame.

6. The self-cleaning energy-saving diesel generator set according to claim 3 is characterized in that: The movable frame rotates on the fixed frame and the rotation axis extends in the vertical direction. The movable frame and the fixed frame are respectively provided with a movable sleeve and a fixed sleeve extending in the vertical direction. The locking member is a locking pin, and the movable sleeve and the fixed sleeve are plug-fitted through the locking pin.

7. The self-cleaning energy-saving diesel generator set according to any one of claims 1 to 6, characterized in that: The heat exchange tube includes a plurality of serpentine tubes distributed in a vertical direction and connected in sequence. The liquid cooling assembly also includes a filter and wash assembly. The filter and wash assembly includes a replacement unit and a filter and wash layer which is arranged one by one directly below the serpentine tube and horizontally. The replacement unit is used to replace the two sides of the filter and wash layer.

8. The self-cleaning energy-saving diesel generator set according to claim 7 is characterized in that: The filter-washing layer is a closed-loop filter cloth. Along the width direction of the filter cloth, the projection shape of the filter cloth is an oval circle. The replacement unit drives the filter-washing layer to rotate along its own circumference.

9. The self-cleaning energy-saving diesel generator set according to claim 8, characterized in that: The replacement unit includes a driving unit and a shaping unit distributed at opposite intervals along the width of the filter cloth, the shaping unit includes a closed-loop rubber belt and rotating wheels arranged at both ends of the rubber belt and transmission-connected, the circumferential outer edge of the rubber belt is fixedly connected to the circumferential inner wall of the filter cloth, and the driving unit drives the rotating wheel to rotate.

10. The self-cleaning energy-saving diesel generator set according to claim 7, characterized in that: The serpentine tube includes a plurality of heat exchange straight tubes arranged side by side in a horizontal direction, the spray assembly includes a plurality of branch tubes arranged side by side in the horizontal direction, the branch tubes are arranged one by one below the heat exchange straight tubes, and the nozzles are distributed axially at intervals at the bottom of the branch tubes.

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