Complete machine heat dissipation device and method applied to diesel generator

Abstract

The invention discloses a complete machine heat dissipation device and method applied to a diesel generator, the complete machine heat dissipation device comprises an outer cover, a plurality of ducted fans, an air ejector, a smoke guide pipe and an air guide pipe, the outer cover is divided into a working layer, a mixing layer and an exhaust layer by a loading plate, an exhaust plate and a support in the direction close to the horizontal ground, the diesel generator body is arranged on the working layer, a ducted fan is arranged at each air inlet of the outer cover, an air outlet of each ducted fan faces the side where the diesel generator body is located, and the air ejector is arranged in the working layer of the outer cover. A spray pipe inlet of the air ejector is communicated with an exhaust port of the diesel generator body through an exhaust pipe, an air inlet of the smoke guide pipe is communicated with a spray pipe outlet of the air ejector, an air outlet of the smoke guide pipe is communicated with a smoke air outlet of the carrying plate, and an air inlet of the air guide pipe is communicated with an air outlet of a heat exchanger of the diesel generator body. And one end of an air outlet of the air guide pipe penetrates through the runner through hole of the loading plate and extends to the mixing layer.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation of thermal engines, and in particular to a whole-machine heat dissipation device and method for use in a diesel generator. Background Art

[0002] A diesel generator is a small power generation device that uses diesel as fuel and a diesel engine as a prime mover to drive the generator to generate electricity, converting other forms of energy into electrical energy. Diesel generators have the advantages of high reliability, quick start-up, and simple maintenance, so they are widely used in many fields. During the operation of a diesel generator, its own temperature will rise and a large amount of high-temperature flue gas will be generated. At present, most diesel engines use internal water cooling to cool down, and natural heat dissipation is implemented for the hot surface of the diesel engine. The heat dissipation efficiency is low, and the flue gas is directly discharged into the atmosphere, which is easy to form a large amount of thermal pollution and aggravate the greenhouse effect. Summary of the invention

[0003] The present application provides a complete machine heat dissipation device and method for a diesel generator, so as to overcome at least one technical problem existing in the prior art.

[0004] The specific technical solutions are as follows:

[0005] In a first aspect, an embodiment of the present application provides a complete heat dissipation device for a diesel generator, comprising:

[0006] An outer cover, in a direction perpendicular to the horizontal ground, a carrier plate and an exhaust plate are sequentially arranged in the outer cover along a direction close to the horizontal ground, and a bracket is arranged on the end surface of the exhaust plate away from the carrier plate, and the bracket is located outside the outer cover, and the carrier plate, the exhaust plate and the bracket divide the outer cover into a working layer, a mixing layer and an exhaust layer along a direction close to the horizontal ground, the diesel generator body is arranged on the carrier plate and located in the working layer, a plurality of air inlets are arranged on the end surface of the heat exchanger of the outer cover away from the diesel generator body, and a smoke outlet and a flow channel through hole are arranged on one end of the carrier plate away from the air inlet,

[0007] A plurality of ducted fans are arranged in the working layer of the outer cover, and one ducted fan is arranged at each air inlet, and the air outlet of the ducted fan faces the side where the diesel generator body is located.

[0008] An air ejector, wherein the air ejector is arranged in the working layer of the outer cover, and the nozzle inlet of the air ejector is connected to the exhaust port of the diesel generator body through an exhaust pipe,

[0009] a smoke guide pipe, wherein the air inlet of the smoke guide pipe is connected to the nozzle outlet of the air ejector, and the air outlet of the smoke guide pipe is connected to the smoke outlet,

[0010] An air duct, the air inlet of the air duct is connected to the air outlet of the heat exchanger of the diesel generator body, one end of the air outlet of the air duct is penetrated by the flow channel through hole and extends to the mixing layer, and the air outlet of the air duct faces the side where the smoke outlet is located.

[0011] In some embodiments of the present application, the air ejector includes a mixing nozzle and a lobe nozzle, the mixing nozzle includes a suction portion, a contraction portion, a mixing portion and a diffusion portion which are connected in sequence and coaxially arranged, the tube diameter of the contraction portion gradually decreases from the inlet end to the outlet end, and the tube diameter of the diffusion portion gradually increases from the inlet end to the outlet end, the lobe nozzle is fixedly arranged in the mixing nozzle and is coaxial with the mixing nozzle, the lobe nozzle includes an integrated smoke inlet portion and a smoke injection portion, the smoke inlet portion is a cylindrical barrel structure, the smoke inlet portion is fixedly arranged in the suction portion, an annular channel is formed between the outer wall of the smoke inlet portion and the suction portion, the smoke injection portion is located at the outlet end of the contraction portion, and the outlet of the smoke injection portion faces the mixing portion.

[0012] In some embodiments of the present application, one end of the smoke injection portion away from the smoke inlet portion is in a multi-lobed shape that is evenly distributed at equal distances, and is connected to the smoke injection portion in a streamlined transition.

[0013] In some embodiments of the present application, a plurality of equidistant and evenly distributed ventilation holes are also provided on the end surface of the heat exchanger of the outer cover away from the diesel generator body, a plurality of the ventilation holes are located in the working layer, and a plurality of the ventilation holes are arranged at one end of the working layer close to the mixing layer.

[0014] In some embodiments of the present application, the exhaust plate is provided with a plurality of first exhaust holes that are evenly distributed at equal distances, each of the first exhaust holes has the same shape, and the shape of the first exhaust holes is one of a rectangle, a trapezoid, a triangle or a hexagon.

[0015] In some embodiments of the present application, the size of the first exhaust hole gradually increases in a direction away from the air outlet of the air duct.

[0016] In some embodiments of the present application, the bracket includes a support plate, a support column and a connecting column. The exhaust plate is fitted on the support plate, and the support plate is provided with second exhaust holes corresponding to the plurality of first exhaust holes one by one. A support column is fixedly provided at each of the four corners of the end surface of the support plate away from the exhaust plate, and the ends of the support columns away from the support plate are connected to each other through a connecting column.

[0017] In some embodiments of the present application, the shape of the flow channel through hole is quasi-isosceles trapezoid, and the cross-section of the air guide duct at the carrier plate is quasi-isosceles trapezoid, and has the same shape and size as the flow channel through hole.

[0018] In some embodiments of the present application, the outer wall surface of the outer cover is covered with a layer of heat insulation material.

[0019] In a second aspect, an embodiment of the present application provides a whole machine heat dissipation method applied to a diesel generator, based on the whole machine heat dissipation device applied to a diesel generator described in the first aspect, comprising:

[0020] The air in the external environment is sucked into the working layer in the outer cover by the duct fan, the first part of the air is absorbed by the diesel generator body for combustion and work, and is transported to the lobe nozzle of the air ejector by the exhaust pipe after being converted into flue gas, the second part of the air exchanges heat with the hot surface of the diesel generator body and the exhaust pipe and the smoke guide pipe, and then, under the action of the fan of the heat exchanger of the diesel generator body, it is discharged to the mixing layer in the outer cover through the air guide pipe, and the third part of the air is sucked into the mixing nozzle through the annular channel between the outer wall of the smoke inlet part of the lobe nozzle and the mixing nozzle of the air ejector under the ejection action of the lobe nozzle, and is mixed with the smoke ejected by the lobe nozzle for the first time, and the mixed smoke is discharged to the mixing layer by the smoke guide pipe;

[0021] The smoke exhausted through the smoke guide pipe and the air exhausted through the air guide pipe are mixed for the second time in the mixing layer, and then discharged to the exhaust layer through the first exhaust hole on the exhaust plate and the second exhaust hole on the bracket, and enter the external environment.

[0022] The beneficial effects of the embodiments of the present application are as follows:

[0023] By means of forced convection and induced air, the air flow near the diesel generator is accelerated, which greatly improves the heat dissipation effect of the diesel generator body. The induced air is mixed with the high-temperature flue gas for the first time, and then the flue gas end is mixed with the air for the second time, which realizes the cooling of the diesel generator exhaust gas, effectively ensuring the safe and stable operation of the diesel generator and avoiding thermal pollution of the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A cross-sectional schematic diagram of a complete heat dissipation device applied to a diesel generator provided in an embodiment of the present application;

[0026] Figure 2 A perspective view of the internal structure of a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0027] Figure 3 A top view of the internal structure of a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0028] Figure 4 A left-side perspective view of the internal structure of a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0029] Figure 5 A perspective view of the three-dimensional internal structure of a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0030] Figure 6 A perspective view of the main internal structure of an outer cover, a loading plate, an exhaust plate and a bracket in a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0031] Figure 7 A top view of a carrier plate in a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0032] Figure 8 A top view of an exhaust plate in a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0033] Fig. 9 A schematic diagram of the three-dimensional structure of a bracket in a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0034] Fig.10 A schematic diagram of the three-dimensional structure of an air ejector in a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0035] Fig.11 A schematic diagram of the three-dimensional structure of a lobe nozzle in a complete heat dissipation device for a diesel generator provided in an embodiment of the present application;

[0036] Fig.12 A schematic diagram of the three-dimensional structure of a mixing nozzle in a complete machine heat dissipation device for a diesel generator provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The terms "including" and "having" in the embodiments of the present application and the accompanying drawings and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0039] The embodiment of the present application discloses a complete heat dissipation device for a diesel generator. Compared with the natural heat dissipation of a traditional diesel generator, the complete heat dissipation device uses a ducted fan to accelerate the air flow near the diesel generator, that is, to form forced air convection near the heating wall of the diesel generator to strengthen the heat dissipation of the diesel generator. At the same time, the complete heat dissipation device uses an air ejector to mix air with the high-temperature flue gas and a secondary mixing method of the flue gas end with air to significantly reduce the exhaust temperature and avoid thermal pollution. The following are detailed descriptions.

[0040] Figure 1 – Fig.12 A complete heat dissipation device for a diesel generator provided according to an embodiment of the present application is shown. Figure 1 – Fig.12 As shown, the whole heat dissipation device mainly includes: an outer cover 1, a plurality of duct fans 5, an air ejector 6, a smoke guide duct 7, and an air guide duct 8.

[0041] The outer cover provides space for the diesel generator body and other components of the whole machine heat dissipation device to realize the air forced convection structure design and provide mixing conditions for the two mixing of flue gas and air. Figure 1 – Fig. 9As shown, the outer cover 1 is one of the main structures of the whole heat dissipation device, which is specifically a shell structure with an open end, and the open end is located at the end of the outer cover 1 close to the horizontal ground. In the direction perpendicular to the horizontal ground, the outer cover 1 is provided with a carrier plate 2 and an exhaust plate 3 in sequence along the direction close to the horizontal ground. The exhaust plate 3 is located at the open end of the outer cover 1, and a bracket 4 is provided on the end surface of the exhaust plate 3 away from the carrier plate 2. The bracket 4 is located outside the outer cover 1. The carrier plate 2, the exhaust plate 3 and the bracket 4 separate the outer cover 1 into a working layer 11, a mixing layer 12 and an exhaust layer 13 along the direction close to the horizontal ground. That is to say, in the direction perpendicular to the horizontal ground, the outer cover 1 is divided into a working layer 11, a mixing layer 12 and an exhaust layer 13 from top to bottom by the carrier plate 2, the exhaust plate 3 and the bracket 4. The working layer 11 is the main working space of the whole machine heat dissipation device. The diesel generator body 9 is arranged in the working layer 11, and is specifically fixed on the carrier plate 2. The diesel generator body 9 includes a heat exchanger 91, and the heat exchanger 91 performs heat exchange and heat dissipation on the coolant used to cool the cylinder of the diesel generator body 9. A plurality of air inlets 14 are arranged on one end face of the outer cover 1 located in the working layer 11, and the end face is away from the heat exchanger 91 of the diesel generator body 9, so that the external air entering from the air inlet 14 sweeps the hot surface of the diesel generator body 9 and then flows through the heat exchanger 91. The mixing layer 12 is a space for secondary mixing of flue gas and air. A flue gas outlet 21 and a flow channel through hole 22 are provided on the carrier plate 2 between the mixing layer 12 and the working layer 11, so that the flue gas in the working layer 11 flows into the mixing layer 12 through the flue gas outlet 21, and the air participating in the secondary mixing enters the mixing layer 12 through the flow channel through hole 22. Furthermore, the flue gas outlet 21 and the flow channel through hole 22 are both far away from one end of the air inlet 14, that is, one end close to the exhaust port of the diesel generator body 9 and the outlet of the heat exchanger 91, and are arranged nearby to reduce the length of the gas delivery pipe (that is, the smoke guide pipe 7 and the air guide pipe 8 in this application). The exhaust layer 13 is the exhaust space for the flue gas after two mixing and cooling, which is connected to the mixing layer 12 and the external environment respectively, so that the gas discharged from the mixing layer 12 can be quickly diffused into the external environment through the exhaust layer 13.

[0042] The ducted fan is the main component of the whole machine cooling device to achieve air forced convection cooling. Figure 1 – Figure 5As shown, a plurality of ducted fans 5 are arranged in the working layer 11 of the outer cover 1. Specifically, a ducted fan 5 is respectively arranged at each air inlet 14, and an air outlet of the ducted fan 5 faces the side where the diesel generator body 9 is located. The number of the ducted fans 5 can be set according to the volume of the diesel generator body 9. For example, when the volume of the diesel generator body 9 is not large, two ducted fans 5 can be used, and the air outlets of the two ducted fans 5 respectively face the long side thermal surfaces of the diesel generator body 9 to maximize the heat dissipation effect of the thermal surface of the diesel generator body 9. In a specific embodiment, the end surface of the outer cover 1 where the air inlet 14 is provided is also provided with a plurality of equidistant and evenly distributed vents 15, the plurality of vents 15 are located in the working layer 11, and the plurality of vents 15 are provided at one end of the working layer 11 close to the mixing layer 12, that is, in a direction perpendicular to the horizontal ground, the vents 15 are provided below the air inlet 14, to ensure that the pressure difference between the inside and outside of the outer cover 1 is the same, thereby ensuring that the air in the outer cover 1 can be forced to convectively dissipate heat, and at the same time, the vents 15 are located below the air inlet 14, which can avoid the air after forced convection heat exchange being directly discharged into the external environment, and ensure that the air participating in the secondary mixing of the flue gas is sufficient. In the specific implementation process, the ducted fan 5 selects any ducted fan in the prior art that meets the requirements of this application, and ensures that the air forced convection heat dissipation of the diesel generator body 9 can be achieved. In addition, the power supply of the ducted fan 5 can be provided by the diesel generator body 9, and the fan air intake of the ducted fan 5 can be adjusted according to the load of the diesel generator body 9 to achieve the best heat dissipation efficiency.

[0043] The air ejector is the main structure for the first mixing of high-temperature flue gas and air in the complete cooling device. Figure 1 , Figure 3 , Fig.10 , Fig.11 as well as Fig.12 As shown, the air ejector 6 is arranged in the working layer 11 of the outer cover 1, and the nozzle inlet of the air ejector 6 is connected to the exhaust port of the diesel generator body 9 through the exhaust pipe 92. The high-temperature flue gas generated by the diesel generator body 9 is transported to the air ejector 6 through the exhaust pipe 92, and is mixed with the air ejected by the air ejector 6 for the first time to reduce the exhaust temperature. The nozzle outlet of the air ejector 6 is connected to the air inlet of the smoke guide pipe 7, and the air outlet of the smoke guide pipe 7 is connected to the smoke outlet 21. The smoke after the initial cooling is transported from the working layer 11 to the mixing layer 12 through the smoke guide pipe 7 to perform the second mixing of the smoke. At the same time, in the working layer 11, the forced convection air will also flow through the exhaust pipe 92 and the smoke guide pipe 7, so as to perform the initial cooling of the high-temperature flue gas generated by the diesel generator body 9 in the exhaust pipe 92, and the smoke after the first mixing and cooling is cooled again in the smoke guide pipe 7.

[0044] In some embodiments, Fig.10 – Fig.12 As shown, the air ejector 6 includes a mixing nozzle 61 and a lobe nozzle 62. The mixing nozzle 61 includes a suction portion 614, a contraction portion 611, a mixing portion 612 and a diffusion portion 613 which are sequentially connected and coaxially arranged. The suction portion 614 and the mixing portion 612 are both cylindrical barrel structures with openings at both ends. The diameter of the contraction portion 611 gradually decreases from the inlet end to the outlet end, and the diameter of the diffusion portion 613 gradually increases from the inlet end to the outlet end. The lobe nozzle 62 is fixedly arranged in the mixing nozzle 61 and is coaxial with the mixing nozzle 61. The lobe nozzle 62 includes an integrated smoke inlet portion 621 and a smoke injection portion 622. The smoke inlet portion 621 is a cylindrical barrel structure. The smoke inlet portion 621 is fixedly arranged in the suction portion 614 of the mixing nozzle 61. An annular channel is formed between the outer wall of the smoke inlet portion 621 and the suction portion 614. The smoke injection portion 622 is located at the outlet end of the contraction portion 611, and the outlet of the smoke injection portion 622 faces the mixing portion 612. The inlet of the smoke inlet portion 621 is connected to the exhaust pipe. The expansion portion 614 of the mixing nozzle 61 The nozzle outlet of the diffusion section 613 is connected with the air inlet of the smoke guide pipe 7, and the high-temperature smoke flows into the smoke injection section 622 through the smoke inlet section 621, and is accelerated and injected into the mixing section 612 of the mixing nozzle 61 through the smoke injection section 622 with a specific structural design. In this process, due to the accelerated injection of the smoke, a negative pressure area is formed at the outlet of the smoke injection section 622, causing the external air to be sucked into the mixing section 612 from the air inlet of the annular channel of the mixing nozzle 61 under pressure, and mixed with the high-temperature smoke in the mixing section 612 to reduce the smoke temperature, and then flows into the smoke guide pipe 7 through the diffusion section 613.

[0045] Further, such as Fig.11 As shown, the end of the smoke injection part 622 away from the smoke inlet part 621 is in a multi-lobed shape with equal distances and uniform distribution, and is connected to the smoke injection part 622 in a streamlined transition. The "lobed shape" in this application refers to Fig.11 The shape formed by four quarter arcs and two straight lines shown in the figure, wherein the radius of two quarter arcs is the same, the radius of the other two quarter arcs is the same and the radius is smaller than the radius of the first two quarter arcs, one end of the two large-radius quarter arcs is connected and concentrically arranged, the two ends of the straight line are respectively connected to the large-radius quarter arc and the small-radius quarter arc, the two small-radius quarter arcs are arranged back to back, and the distance between the two straight lines connecting the two ends of the large-radius quarter arc is greater than the distance between the two straight lines connecting the two ends of the small-radius quarter arc. The specific structural design of the multi-lobed smoke injection part 622 can realize the accelerated injection of high-temperature smoke.

[0046] It should be noted and understood that the air ejector in the embodiment of the present application replaces the nozzle in the traditional ejector with the multi-lobed nozzle in the present embodiment, which is one of the invention points of the present application. While ensuring the ejection effect, the mixing of air and high-temperature flue gas is enhanced, and the overall length and size of the ejector are shortened on the basis of ensuring high ejection efficiency and mixing efficiency.

[0047] In the embodiments of the present application, Figure 1 As shown, the air inlet of the air duct 8 is connected with the air outlet of the heat exchanger 91 of the diesel generator body 9, and a flow channel through hole 22 is provided at one end of the air outlet of the air duct 8 to extend to the mixing layer 12, and the air outlet of the air duct 8 faces the side where the flue gas outlet 21 is located, so that the air discharged from the heat exchanger 91 is transported to the mixing layer 12, and is mixed with the flue gas ejected from the flue gas outlet 21 for a second time, thereby further reducing the flue gas temperature.

[0048] In some embodiments, Figure 7 As shown, the shape of the flow channel through hole 22 is similar to an isosceles trapezoid, and the cross section of the air guide tube at the carrier plate 2 is similar to an isosceles trapezoid, and has the same shape and size as the flow channel through hole 22. Further, as shown in FIG. Figure 3 As shown, the cross-section of the air duct 8 gradually increases from the point connected to the air outlet of the heat exchanger 91 to the air outlet of the air duct 8, and the cross-section at the air outlet of the air duct 8 is the same as the vertical cross-section of the mixing layer 12 to ensure that the flue gas and air are fully mixed.

[0049] In other embodiments, Figure 8 As shown, the exhaust plate 3 is provided with a plurality of first exhaust holes 31 evenly distributed at equal distances, and each first exhaust hole 31 has the same shape, and the shape of the first exhaust hole 31 is one of a rectangle, a trapezoid, a triangle or a hexagon. For example, the first exhaust hole 31 uses a rectangular opening to ensure the load-bearing strength of the exhaust plate 3 and the gas flowability between the mixed layer and the exhaust layer. Of course, trapezoidal, triangular or hexagonal openings can also be used as long as their shape and size do not affect the load-bearing strength and flowability. Further, in the specific implementation process, as Figure 2 and Figure 8 As shown, the size of the first exhaust hole 31 gradually increases in the direction away from the air outlet of the air duct 8. In the mixed layer 12, the gas flow rate decreases from the air outlet of the air duct 8 to both sides. Therefore, the exhaust air flowability on both sides is required to be greater than that at the air outlet of the air duct 8. The present application adopts the first exhaust hole 31 whose size gradually increases in the direction away from the air outlet of the air duct 8, which can effectively speed up the exhaust and ensure the overall gas flowability of the mixed layer 12.

[0050] In other embodiments, Fig. 9As shown, the bracket 4 includes a support plate 41, a support column 42 and a connecting column 43. The exhaust plate is fitted on the support plate 41, and the support plate 41 is provided with second exhaust holes 411 corresponding to the plurality of first exhaust holes. The second exhaust holes 411 are provided to achieve gas circulation between the exhaust layer and the mixing layer. A support column 42 is fixedly provided at the four corners of the end face of the support plate 41 away from the exhaust plate 3, and the ends of the two support columns 42 away from the support plate 41 are connected by a connecting column 43. Therefore, the overall load-bearing capacity of the bracket 4 is ensured and rapid exhaust of the mixing layer is achieved through the provision of the support plate 41, the support column 42 and the connecting column 43.

[0051] In the embodiment of the present application, the outer wall surface of the outer cover is covered with a layer of heat insulation material to shield infrared rays emitted by the working heat of the diesel generator body.

[0052] The above is an introduction to the various components of the complete heat dissipation device for a diesel generator provided in this embodiment and the connection relationship between them. Figure 1 – Fig.12 , the working principles of each layer of the whole machine heat dissipation device used in diesel generators are briefly introduced.

[0053] The air in the external environment is sucked into the working layer 11 by the ducted fan 5, and exchanges heat with the diesel generator body 9, the exhaust pipe 92 and the smoke duct 7. Part of the air in the working layer 11 is ejected by the air ejector 6 and mixed with the smoke to reduce the smoke temperature. The mixed smoke is mixed again with the air after the heat exchange in the working layer 11 in the mixing layer 12, and then enters the exhaust layer 13 through the exhaust plate 3 and is discharged to the external environment by the bracket 4. By forced convection and ejecting air, the problem of low efficiency of traditional heat dissipation methods is solved, and the heat dissipation of the diesel generator is greatly enhanced.

[0054] Another embodiment of the present application also discloses a whole machine heat dissipation method applied to a diesel generator, based on the whole machine heat dissipation device applied to a diesel generator in the above embodiment, the specific structure and working principle of the whole machine heat dissipation device can be referred to the above embodiment of the whole machine heat dissipation device applied to a diesel generator, which will not be repeated here. Figure 1 – Fig.12 As shown, the whole machine heat dissipation method includes:

[0055] The air in the external environment is sucked into the working layer 11 in the outer cover 1 by the ducted fan 5. The first part of the air is absorbed by the diesel generator body 9 for combustion and work, and is then transported to the lobe nozzle 62 of the air ejector 6 by the exhaust pipe 92 after being converted into flue gas. The second part of the air exchanges heat with the hot surface of the diesel generator body 9, the exhaust pipe 92 and the smoke guide pipe 7 to achieve the effect of cooling and strengthening heat dissipation. Afterwards, under the action of the fan of the heat exchanger 91 of the diesel generator body 9, the air is discharged to the mixing layer 12 in the outer cover 1 through the air guide pipe 8. The third part of the air is sucked into the mixing nozzle 61 through the annular channel between the outer wall of the smoke inlet part 621 of the lobe nozzle 62 and the mixing nozzle 61 of the air ejector 6 under the ejection action of the lobe nozzle 62, and is mixed with the smoke ejected by the lobe nozzle 62 for the first time. The mixed smoke is discharged to the mixing layer 12 by the smoke guide pipe 7.

[0056] The smoke exhausted through the smoke duct 7 and the air exhausted through the air duct 8 are mixed for the second time in the mixing layer 12, and then discharged to the exhaust layer 13 through the first exhaust hole 31 on the exhaust plate 3 and the second exhaust hole 411 on the bracket 4, and enter the external environment.

[0057] In summary, the embodiments of the present application provide a complete machine heat dissipation device and method for a diesel generator, which accelerates the air flow near the diesel generator by forced convection and induced air, greatly improves the heat dissipation effect of the diesel generator body, and induced air is mixed with the high-temperature flue gas for the first time, and then the flue gas end is mixed with the air for a second time, thereby realizing the cooling of the diesel generator exhaust gas, which can effectively ensure the safe and stable operation of the diesel generator and avoid thermal pollution of the environment.

[0058] Those skilled in the art will understand that the accompanying drawings are only schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present application. In addition, the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be changed accordingly and located in one or more devices different from the present embodiments. The modules in the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

[0059] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. In addition, in the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood in specific circumstances. In addition, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0060] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A complete heat dissipation device for a diesel generator, characterized in that: include: An outer cover, in a direction perpendicular to the horizontal ground, a carrier plate and an exhaust plate are sequentially arranged in the outer cover along a direction close to the horizontal ground, and a bracket is arranged on the end surface of the exhaust plate away from the carrier plate, and the bracket is located outside the outer cover, and the carrier plate, the exhaust plate and the bracket divide the outer cover into a working layer, a mixing layer and an exhaust layer along a direction close to the horizontal ground, the diesel generator body is arranged on the carrier plate and located in the working layer, a plurality of air inlets are arranged on the end surface of the heat exchanger of the outer cover away from the diesel generator body, and a smoke outlet and a flow channel through hole are arranged on one end of the carrier plate away from the air inlet, A plurality of ducted fans are arranged in the working layer of the outer cover, and one ducted fan is arranged at each air inlet, and the air outlet of the ducted fan faces the side where the diesel generator body is located. An air ejector, wherein the air ejector is arranged in the working layer of the outer cover, and the nozzle inlet of the air ejector is connected to the exhaust port of the diesel generator body through an exhaust pipe, a smoke guide pipe, wherein the air inlet of the smoke guide pipe is connected to the nozzle outlet of the air ejector, and the air outlet of the smoke guide pipe is connected to the smoke outlet, An air duct, the air inlet of the air duct is connected to the air outlet of the heat exchanger of the diesel generator body, one end of the air outlet of the air duct is penetrated by the flow channel through hole and extends to the mixing layer, and the air outlet of the air duct faces the side where the smoke outlet is located.

2. The whole machine heat dissipation device applied to a diesel generator according to claim 1, characterized in that: The air ejector includes a mixing nozzle and a lobe nozzle. The mixing nozzle includes a suction portion, a contraction portion, a mixing portion and a diffusion portion which are connected in sequence and arranged coaxially. The diameter of the contraction portion gradually decreases from the inlet end to the outlet end, and the diameter of the diffusion portion gradually increases from the inlet end to the outlet end. The lobe nozzle is fixedly arranged in the mixing nozzle and is coaxial with the mixing nozzle. The lobe nozzle includes an integrated smoke inlet portion and a smoke injection portion. The smoke inlet portion is a cylindrical barrel structure. The smoke inlet portion is fixedly arranged in the suction portion. An annular channel is formed between the outer wall of the smoke inlet portion and the suction portion. The smoke injection portion is located at the outlet end of the contraction portion, and the outlet of the smoke injection portion faces the mixing portion.

3. The whole machine heat dissipation device applied to a diesel generator according to claim 2, characterized in that: One end of the smoke injection portion away from the smoke inlet portion is in a multi-lobed shape with equal distance and uniform distribution, and is connected to the smoke injection portion in a streamlined transition.

4. The whole machine heat dissipation device applied to a diesel generator according to claim 1, characterized in that: The end surface of the heat exchanger of the outer cover away from the diesel generator body is also provided with a plurality of equidistant and evenly distributed ventilation holes, and the plurality of ventilation holes are located in the working layer, and the plurality of ventilation holes are arranged at one end of the working layer close to the mixing layer.

5. The whole machine heat dissipation device applied to a diesel generator according to claim 1, characterized in that: The exhaust plate is provided with a plurality of first exhaust holes which are evenly distributed at equal distances, each of which has the same shape, and the shape of the first exhaust holes is one of a rectangle, a trapezoid, a triangle or a hexagon.

6. The whole machine heat dissipation device for diesel generator according to claim 5, characterized in that: The size of the first exhaust hole gradually increases in a direction away from the air outlet of the air guide pipe.

7. The whole machine heat dissipation device for diesel generator according to claim 5, characterized in that: The bracket includes a support plate, a support column and a connecting column. The exhaust plate is fitted on the support plate, and the support plate is provided with second exhaust holes corresponding to the plurality of first exhaust holes one by one. A support column is fixedly provided at each of the four corners of the end surface of the support plate away from the exhaust plate, and two ends of the support columns away from the support plate are connected by a connecting column.

8. The whole machine heat dissipation device applied to a diesel generator according to claim 1, characterized in that: The shape of the flow channel through hole is quasi-isosceles trapezoid, and the cross section of the air guide pipe at the carrier plate is quasi-isosceles trapezoid, and has the same shape and size as the flow channel through hole.

9. The whole machine heat dissipation device applied to a diesel generator according to claim 1, characterized in that: The outer wall surface of the outer cover is covered with a heat insulation material layer.

10. A whole machine heat dissipation method applied to a diesel generator, characterized in that: The whole machine heat dissipation device applied to a diesel generator according to any one of claims 1 to 9 comprises: The air in the external environment is sucked into the working layer in the outer cover by the duct fan, the first part of the air is absorbed by the diesel generator body for combustion and work, and is transported to the lobe nozzle of the air ejector by the exhaust pipe after being converted into flue gas, the second part of the air exchanges heat with the hot surface of the diesel generator body and the exhaust pipe and the smoke guide pipe, and then, under the action of the fan of the heat exchanger of the diesel generator body, it is discharged to the mixing layer in the outer cover through the air guide pipe, and the third part of the air is sucked into the mixing nozzle through the annular channel between the outer wall of the smoke inlet part of the lobe nozzle and the mixing nozzle of the air ejector under the ejection action of the lobe nozzle, and is mixed with the smoke ejected by the lobe nozzle for the first time, and the mixed smoke is discharged to the mixing layer by the smoke guide pipe; The smoke exhausted through the smoke guide pipe and the air exhausted through the air guide pipe are mixed for the second time in the mixing layer, and then discharged to the exhaust layer through the first exhaust hole on the exhaust plate and the second exhaust hole on the bracket, and enter the external environment.

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