CN113898462A

CN113898462A - Air cooling heat dissipation method for digital generator

Info

Publication number: CN113898462A
Application number: CN202111349825.0A
Authority: CN
Inventors: 尹登昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-01-07
Anticipated expiration: 2041-11-15
Also published as: CN118361315A; CN113898462B

Abstract

The invention discloses an air cooling heat dissipation method for a digital generator, which adopts a partition plate to divide an inner cavity of a shell of the generator into a low-temperature area at the left side and a high-temperature area at the right side. The invention has the advantages of smaller air flow loss, more scientific cooling path design, higher cooling efficiency and better cooling balance; the whole heat dissipation cooling effect of generator can be improved better, the general engine job stabilization nature is improved, the whole life-span of extension equipment.

Description

Air cooling heat dissipation method for digital generator

Technical Field

The invention relates to the technical field of general engine cooling, in particular to an air cooling heat dissipation method for a digital generator.

Background

The general engine is a general machine provided with an engine, and is supported by the power provided by the engine to complete various functions, for example, a water pump is arranged to pump water, and a motor for generating electricity is arranged to generate electricity. The general engine generator is a small portable generator formed by mounting a power generation assembly at the output end of a general engine and is generally used for families.

In an engine, a gasoline engine generally comprises two large mechanisms and five large systems, namely a crank link mechanism, a valve train mechanism, a fuel supply system, a lubricating system, a cooling system, an ignition system and a starting system. Diesel engines are usually composed of two large mechanisms and four large systems, namely, a crank link mechanism, a valve mechanism, a fuel supply system, a lubricating system, a cooling system and a starting system, and the diesel engine is compression-ignited without an ignition system. The cooling system is divided into water cooling, air cooling and water cooling and air cooling. The application mainly relates to an air cooling system, namely an air cooling engine (also called an air cooling engine, hereinafter referred to as an engine) is arranged to form an air flow air passage in a general gasoline engine to improve the heat dissipation effect of the whole general gasoline engine and achieve the effect of stable work.

The conventional general engine generator comprises an engine, a generator component, a control panel, an oil tank and other components, wherein the components are generally packaged by a case shell to form a relatively sealed general engine body, so that the general engine generator is convenient to carry, sound-proof, attractive and safe. In order to save cost, the generator is not packaged by a case shell and is commonly called an open-rack general-purpose generator. The application relates to a digital generator packaged by a case shell.

The digital generator structurally comprises a case shell, wherein a control panel is arranged on one side face of the case shell, and an oil tank, a controller, a current conversion module, an engine, a generator assembly and a silencer are also arranged in the case shell; the fan of the hand-pulling disc and the fan of the generator generate air flow to realize air inlet from the air inlet, and the air flow entering the case shell cools each part and then flows out from the air outlet through the silencer.

Therefore, the conventional general engine generator has the following defects: 1 the structure is that various parts are uniformly arranged in the shell of the machine, and all components are positioned in a large space. Because engine work can produce a large amount of heats, generator work also need produce a large amount of heats, though there are two fans to exhaust air and cool, whole cooling effect is relatively poor, and the temperature is higher in the whole quick-witted case. Meanwhile, the cooling pertinence is poor, heat resistance of all components in the case is different, and the operation quality of the whole machine is influenced and even damaged after some components are poor in heat dissipation and overhigh in temperature, so that the whole machine cannot work.

In order to solve the above problems, the inventor has applied for a cooling and heat dissipating method of an all-engine generator in patent CN202011244280.2, in the method, a partition board is adopted to divide an inner cavity of a casing of the all-engine generator into a left low-temperature region and a right high-temperature region, air guide ports communicating the left side and the right side are formed in the partition board, and guide air flow to enter from an air inlet of the left low-temperature region of the casing, then flow through a control panel, a controller and a current conversion module, then flow through an oil tank, enter from the air guide ports into the right high-temperature region, and flow out from the air outlet through an engine assembly and a generator assembly and a silencer in the high-temperature region, so as to cool internal components of the all-engine generator. The invention has better heat dissipation and temperature reduction effects, can improve the working stability of the general gasoline engine and prolong the service life of equipment. However, the invention still has the defects of large wind flow loss and low cooling efficiency; some wind current cooling path structural design defects lead to the place that the wind current is difficult to reach all the time, still are difficult to improve the cooling effect after improving wind strength, and the poor cooling equilibrium leads to having reduced the whole cooling effect of general purpose engine, is difficult to guarantee the improvement of general purpose engine whole life-span.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a digital generator air-cooled heat dissipation method that wind current loss is less, and the cooling path design is more scientific, and cooling efficiency is higher, and the cooling equilibrium is better. The whole heat dissipation and cooling effect of the generator can be better improved, the working stability of the general engine is improved, and the whole service life of the equipment is prolonged.

In order to solve the technical problems, the invention adopts the following technical scheme:

an air-cooled heat dissipation method for a digital generator, which adopts a clapboard to divide the inner cavity of a generator case into a left low-temperature area and a right high-temperature area, guides air flow to enter from an air inlet of the left low-temperature area of the case, then flows through a control panel, a controller and a current conversion module, and then enters into the right high-temperature area through the clapboard, is characterized in that an engine shell is sleeved outside the engine body in the right high-temperature area at intervals, a hand-pulling disc fan used as the air flow power is positioned inside an opening at the left end of the engine shell, so that the air in the high-temperature area flows into the engine shell from the opening at the left end of the engine shell after flowing through and cooling the engine, flows through a silencer from the upper right of the engine shell, and then flows out of the generator case from an air outlet of the silencer, the cooling of the internal components of the generator is realized.

Therefore, the invention separates the components with poor high temperature resistance in the digital generator into a low temperature area, separates the components which can bear high temperature to a high temperature area, and leads the components in the two areas to be sequentially cooled according to the requirement of a cooling level by guiding the wind flow path. Therefore, the cooling and heat dissipation effect of the general engine generator is greatly improved integrally, the working stability is improved, and the service life of the equipment is prolonged. Meanwhile, in the invention, the engine shell is sleeved outside the engine main body at intervals, so that the engine with the maximum heat productivity can be better separated from other components, and meanwhile, the hand-pulling disc fan serving as the wind flow power is positioned inside the opening at the left end of the engine shell, so that the wind flow can be ensured to finally flow into the engine shell from the opening at the left end of the engine shell in a high-temperature area, and the engine is cooled.

The method is further realized by adopting the following digital generator, the digital generator comprises a case shell, a control panel is arranged at the middle lower part of the left end face of the inner cavity of the case shell, a main air inlet is arranged on the case shell corresponding to the control panel, an oil tank is arranged at the left upper part of the inner cavity of the case shell, a controller and a current conversion module are further arranged at the left lower part of the inner cavity of the case shell, an engine is arranged below the right part of the inner cavity of the case shell, a generator is arranged on the engine, a hand-pull disc fan is arranged at the left end of the engine, a hollow filter, a carburetor, a high-pressure bag and an engine cylinder head are further arranged on the engine, a silencer is arranged above the right end of the inner cavity of the case shell and is connected with an air outlet at the right end of the case shell, a vertical partition plate arranged in the width direction is arranged in the case shell, so that the inner cavity of the case shell is divided into a left low-temperature area and a right high-temperature area, a low-temperature area, a high-temperature area and a high-temperature area are arranged at the left side, The controller, the current conversion module and part of the oil tank are arranged at one end of a low-temperature area, and the engine and the upper components thereof such as a silencer are arranged at one end of a high-temperature area; the engine comprises an engine body, an air filter, a carburetor, a high-pressure bag and an engine cylinder head, wherein the engine body is sleeved with an engine shell at intervals, the air filter, the carburetor, the high-pressure bag and the engine cylinder head are all arranged outside the engine shell, a hand-pulling disc fan serving as airflow power is located inside an opening at the left end of the engine shell, and the upper portion of the right end of the engine shell is communicated with a silencer.

Like this, control panel, controller and current conversion module are electric components, and high temperature tolerance is relatively poor, arranges low temperature region in and can prolong life better, and the oil tank is the high-risk component, and it is rotten or even burning explosion to be heated too high petrol (or diesel oil) easy reaction, so arrange low temperature region in and can improve factor of safety better. The engine assembly, the generator assembly and the silencer can emit heat when working, the heat resistance of the engine assembly, the generator assembly and the silencer is relatively high, and the engine assembly, the generator assembly and the silencer are independently arranged in a high-temperature area to reduce the influence on components in a low-temperature area. The control panel is positioned at the air inlet, so that the cooling effect is optimal, the safety is optimal, and the stability and reliability of the control of the equipment are ensured. The added engine shell can enable air in a high-temperature area to enter the engine shell from an opening at the left end of the engine shell to cool the engine shell after passing through a carburetor and an engine cylinder head outside the engine shell, and finally flow out of a generator case shell from a silencer to cool internal components of the generator.

Further, the upper end of the machine case shell is also provided with a handle. The whole mobile phone is convenient to carry.

Preferably, the whole vertical partition plate is in a vertical plate shape and is arranged at the position below the middle part of the oil tank along the width direction, the lower end and the two ends in the width direction of the vertical partition plate are connected with the bottom surface of the inner cavity of the engine case and the front and rear inner side walls, an air passing opening is formed between the upper end of the vertical partition plate and the lower surface of the oil tank, an air passing interval is reserved between the right side surface of the vertical partition plate and the opening at the left end of the engine case, the carburetor is arranged at the position above the left end of the engine case, and the air filter is arranged at the position below the right end of the engine case.

Therefore, after the air flow enters from the main air inlet at the left end of the engine box shell, part of the air flow can flow from the lower part of the oil tank, pass through the controller and the current conversion module, upwards cross the air passing opening at the upper end of the vertical partition plate and then downwards enter an air cooling path inside the engine shell through the carburetor. The cooling of the components such as the controller, the current conversion module, the oil tank, the carburetor, the air filter and the like can be well realized. When the vertical partition plate is implemented, the vertical partition plate can be formed by one or more independent parts (newly added parts), other parts (such as a current conversion module and the like) can be modified, one or more parts can be modified, and the effect of separating the parts is achieved.

Furthermore, a gap for air supply flow to pass through is reserved between the left end and the upper end surface of the oil tank and the case shell, and the cylinder head of the engine is positioned at a position which is opposite to the upper surface of the middle part of the engine and the right end of the oil tank in an inclined downward mode.

Therefore, after the air flow enters from the main air inlet at the left end of the engine case shell, part of the air flow can flow through the oil tank from the upper part of the oil tank, flows downwards through the engine cylinder head, flows back to the interval between the vertical partition plate and the left end of the engine case shell and then enters an air cooling path inside the engine case shell. In this way, a better cooling of the oil tank and the engine cylinder head and the high-pressure package thereon can be achieved. Therefore, by means of two air cooling paths formed by the partition and the oil tank, a good cooling effect on most of components in the engine can be achieved. Simultaneously with the background art the scheme of the patent that the inventor applied for before compares, and the vertical baffle that adopts in this scheme only is half flat vertical baffle of general plane cross section size, and the structure is simpler, and the consumptive material still less, and it is more convenient to install, and has greatly reduced because of vertical baffle self exists the air current loss that leads to, has improved forced air cooling efficiency.

As a mode, a gap is reserved between the whole upper end of the vertical partition plate and the lower surface of the oil tank, and the air passing port is formed. This facilitates installation.

As another mode, the upper end of the vertical partition plate is connected with the lower surface of the oil tank, a gap is formed in the upper end of the vertical partition plate and forms an air passing port, and the gap is arranged opposite to the right carburetor.

Therefore, the air flow can be better controlled to pass through the air passing opening and be better cooled by the carburetor, and the cooling effect on important parts is improved.

Furthermore, a groove is formed in the surfaces of the left end and the upper end of the mailbox in a penetrating mode from left to right, and an outlet at the right end of the groove is arranged in a direction opposite to a high-pressure bag on an engine cylinder body.

Thus, the groove enables the space between the position and the machine case to be increased, so that a part of the air flow of the path can be intensively exhausted from the groove and the cooling effect on the engine cylinder block and a high-pressure bag on the engine cylinder block is improved. Further, the carburetor and the high-pressure package on the engine cylinder block are arranged in a staggered mode in the width direction of the engine case. Therefore, the two air cooling path channels can better ensure the concentrated cooling effect on the important component carburetor and the high-pressure bag respectively, and the reduction of the cooling effect caused by mutual interference is avoided.

Furthermore, a control panel is installed on the left end face of the case shell, and a control panel air inlet is arranged on the case shell corresponding to the control panel and serves as a main air inlet.

Like this, control panel installs at the leftmost end as the most central electric control part component, not only convenient operation, and the air current cools off control panel from this place air inlet earlier moreover, guarantees that the cooling effect is best, guarantees that its work realizes automatically controlled reliability and life.

Furthermore, the controller and the current conversion module are vertically installed on the lower bottom surface of the case shell at the front end of the air inlet of the control panel at intervals in parallel, and an air inlet of the controller current conversion module is further formed in the lower bottom surface of the case shell where the controller and the current conversion module are located and serves as a secondary air inlet.

Therefore, the air current entering from the air inlet of the control panel is directly blown to the controller and the current conversion module to cool important electric components, and the working reliability of the electric components is ensured. Simultaneously the secondary air inlet can simultaneously realize the direct cooling of controller and current conversion module better, and the secondary air inlet air still is favorable to the guide to flow upward by the guide after the air current that comes in and goes out from the main air inlet shelters from controller and current conversion module to finally cross vertical baffle.

Further, the lower part of the right end of the oil tank is provided with an integrally upwards-sunken depressed part which is positioned at the right side of the vertical partition plate and forms a wind flow converging area chamber which is enlarged in space on a wind flow flowing path.

Therefore, the wind flows of the two wind flow paths below and above the oil tank can better flow downwards after being mutually converged at the position of the cavity of the wind flow convergence area, and the mutual collision and offset caused wind loss can not be generated.

As an option, the generator is installed at the right end of the engine, and the end face of the right end of the case shell is provided with a generator air inlet right facing the generator and can intake air by means of a motor fan in the generator.

This enables better cooling of the generator. During implementation, a second partition part can be additionally arranged at the fan of the generator according to requirements so as to adjust the air flow direction entering from the air inlet of the generator.

As another option, the generator is arranged at the left end of the engine, the main shaft of the engine can rotatably penetrate out of the shell of the engine rightwards and is provided with an auxiliary fan, and an auxiliary air port is arranged on the end face of the right end of the shell of the engine and is opposite to the auxiliary fan.

Like this, can rely on auxiliary fan air inlet or air-out, improve the cooling effect to quick-witted case shell internals. During implementation, a second partition part can be additionally arranged at the auxiliary fan according to requirements so as to adjust the air flow direction entering the auxiliary air opening.

Alternatively, the vertical partition plate is an independent vertical partition plate and is fixedly arranged in the inner cavity of the chassis shell.

Thus, the vertical partition plate is convenient to manufacture and install.

Alternatively, the vertical partition is an integrated vertical partition integrated with the controller or the current conversion module.

This saves the number of components and costs.

Furthermore, a reflecting layer is attached to the right side face of the vertical partition plate.

Therefore, the reflecting layer can better reflect the heat radiation emitted by the engine and the generator in the high-temperature area on the right side, the heat radiation is prevented from being emitted into the low-temperature area on the left side, and the cooling effect of the low-temperature area on the left side is better ensured.

Further, the reflecting layer is a tin-platinum material layer.

Thus, the heat reflection effect and the heat insulation effect can be better ensured.

As another preferable aspect of the partition: the vertical partition board is integrally vertical plate-shaped and is arranged at the position below the middle part of the oil tank along the width direction, the two ends of the lower end and the width direction of the vertical partition board are connected with the bottom surface of the inner cavity of the engine case and the front and back inner side walls, an air passing port is arranged between the upper end of the vertical partition board and the lower surface of the oil tank, a horizontal partition board in a flying leg shape is further arranged between the right side surface of the vertical partition board and the upper end of the left side of the engine case, the carburetor and the engine cylinder body are arranged at the upper part of the engine case and are positioned at the position above the right of the horizontal partition board, and the air filter is arranged at the position below the right end of the engine case and is positioned below the horizontal partition board.

The reason for this improvement is that the structure of the individual vertical partition, although simple and easy to install, still has the same drawbacks as the solution of the prior art. That is, the design of the air flow cooling path is still not perfect enough, which can cause that some local places in the engine case shell, such as the position of the area outside the silencer at the upper right corner, the position from the lower right corner to the bottom area of the engine case shell, and the like, form air flow dead corners, no or few air flows pass, and even if the wind strength is improved, the cooling effect is difficult to achieve. Therefore, the balance of internal cooling of the general gasoline engine is poor, the whole cooling effect of the general gasoline engine is reduced, and the whole service life of the general gasoline engine is shortened. Meanwhile, after the temperature of the air and the temperature of the parts in the dead angle area are increased, the heat balance is achieved only by means of heat dissipation of the outer surface of the case shell of the case, and accordingly the heat dissipation of the engine is poor, the temperature is increased, and the whole heat dissipation effect of the whole engine can be reduced. Some manufacturers select a mode of forming air holes in the case in the area difficult to cool, and in addition, the outer surface of the case shell can be damaged, the appearance is not attractive, the noise volume is increased, the flow direction of cooling air in the case shell is changed, the air inlet volume of the air inlet of the control panel is reduced, the cooling of an inverter (or a controller and a current conversion module) is poor, and the performance of the whole engine is adversely affected.

After the horizontal partition plate is added, an air flow channel which directly enters the left end opening of the engine shell from the upper right of the vertical partition plate is separated, air flow is forced to enter a high-temperature area from the upper right of the vertical partition plate and then can only flow from the upper right of the engine shell (the other air cooling path above the oil tank can only flow from the upper right of the engine shell after converging after flowing out from the upper side of the oil tank), after passing through a carburetor, an engine cylinder body and a silencer shell, the air cooling path flows downwards from the right end of the engine shell after turning to the left and then flows into a space between the left end of the engine shell and the vertical partition plate, enters the engine shell from an opening at the left end of the engine shell, and after cooling the engine, the air flow out of the engine shell through the inside of the silencer. Thus, the air flow forms a large-circulation air cooling path similar to an ellipse in the high-temperature chamber part in the machine shell, and the area which cannot be reached by all the air flow before can be sent to a part of the air flow for cooling. Therefore, the cooling balance of internal components of the general gasoline engine is greatly improved, the overall cooling effect is improved, and the overall service life is prolonged. Meanwhile, the large-circulation air cooling path enables all components in the low-temperature area and the high-temperature area to be cooled from high to low according to the cooling requirement degree; each component cooling level is clear, the wind flow path is more reasonable, the whole ventilation is smooth, the whole cooling effect of the general gasoline engine is greatly improved and optimized, and the working stability of the general gasoline engine is improved.

Furthermore, the left end of the horizontal partition plate is fixed on the vertical partition plate, the right end of the horizontal partition plate is connected with the upper end of the left side of the engine shell, and the front end and the rear end of the horizontal partition plate are connected with the front side and the rear side of the inner cavity of the engine shell.

Thus, the installation is convenient, and the horizontal partition effect can be better achieved. In practice, the horizontal partition may be fixedly installed on the engine housing or the housing case.

Therefore, after the air flow enters from the main air inlet at the left end of the cabinet shell, part of the air flow can flow through the oil tank from the upper part of the oil tank and enter the large-circulation air cooling path towards the right. The cooling effect on the oil tank can be better realized.

Furthermore, the upper end of the vertical partition plate is connected with the lower surface of the oil tank, a gap is formed in the upper end of the vertical partition plate and forms an air passing port, and the position of the gap is over against the right-side carburetor and the position of a high-pressure bag on an engine cylinder body.

Therefore, the air flow can be better controlled to pass through the air passing opening and better cool the carburetor and the high-pressure bag, and the cooling effect on important parts is improved.

When the air inlet is implemented, the whole upper end of the vertical partition plate and the lower surface of the oil tank can be separated to form the air inlet. This facilitates the installation.

Furthermore, supporting legs are arranged between the lower end of the engine shell and the lower surface of the inner cavity of the engine shell, and an interval is formed.

In this way, the formation of the large-circulation air-cooling path can be guided better. After the air flows to the right end of the case shell through the large-circulation air cooling path, more air can flow back to the left from the lower part of the engine shell, so that components below the engine shell can be better cooled, and an air filter below the left end of the engine shell can be better cooled.

Furthermore, the middle parts of the front side surface and the rear side surface of the inner cavity of the case shell, which correspond to the upper end part of the engine shell, are respectively provided with a front boss part and a rear boss part which are integrally and inwards protruded along the horizontal direction.

Thus, the presence of the front boss part and the rear boss part is due to the clearance between the front and rear sides of the engine case and the case shell. Particularly, the front side and the rear side of the inner cavity of the housing are vertical flat sides, but the front side and the rear side of the engine housing are uneven non-uniform sides due to the fact that the engine housing needs to be matched with the appearance of an internal engine. Therefore, after the air flow crosses the vertical partition plate and enters a high-temperature area, the air flow easily flows downwards from the gaps on the two sides of the engine shell prematurely and turns to flow leftwards to the opening at the left end of the engine shell, so that the forming effect of a large-circulation air cooling path is poor, and the cooling effect of the right end part of the engine is poor. And because the unevenness of side around, lead to the clearance not of uniform size, and then lead to the amount of wind that leaks down different in position everywhere, and then very big to follow-up big interference effect of circulating forced air cooling route. After the front boss part and the rear boss part are provided, the above-mentioned defects can be greatly improved.

Meanwhile, the structural forms of the front boss part and the rear boss part can be set according to the following mode, the shapes of the inner side faces of the front boss part and the rear boss part are set to be consistent with the shape of the concave-convex shape of the engine shell opposite to the front boss part and the rear boss part, and the distance between the inner side faces of the front boss part and the rear boss part and the corresponding engine shell is uniformly increased from left to right. Therefore, the interference influence on the large-circulation air cooling path caused by air leakage due to irregular shapes of the front side surface and the rear side surface of the engine shell is avoided. And meanwhile, the air flow passing downwards from the two sides of the engine shell is orderly controlled to be gradually improved from left to right, so that the normal circulation of a large-circulation air cooling path is greatly ensured, and the air cooling effect of components at each position at the right end of the inner cavity of the engine shell is ensured. The equilibrium of the inside position everywhere of quick-witted case shell and component cooling effect has been guaranteed to the at utmost, lets the inside each spare part of general purpose engine dispel the heat as required. The whole cooling and heat dissipation effect of the general gasoline engine is improved, and the working stability of the general gasoline engine is improved.

Further, the front boss part and the rear boss part are located at adjacent positions below the horizontal partition plate. The achievement of the above effect is better ensured.

When the front boss part and the rear boss part are implemented, the front boss part and the rear boss part can be independent plate-shaped members and are fixed on the inner cavity of the machine shell, and can also be integrally formed with the machine shell.

In conclusion, the invention has the advantages of smaller wind flow loss, more scientific cooling path design, higher cooling efficiency and better cooling balance; the whole heat dissipation cooling effect of generator can be improved better, the general engine job stabilization nature is improved, the whole life-span of extension equipment.

Drawings

Fig. 1 is a schematic structural diagram of a first digital generator adopted by the present invention.

Fig. 2 is a schematic structural diagram of a second digital generator adopted by the invention.

Fig. 3 is a schematic structural diagram of a third digital generator adopted by the invention.

Fig. 4 is a schematic view showing a region where each member is located from a top view in fig. 3.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments. Wherein the description of the orientation is based primarily on the illustration in the drawings as a basis for the description of the orientation.

Example 1: a digital generator air-cooling heat dissipation method, adopt the baffle to divide the generator housing inner chamber into left low temperature area and right high temperature area, guide the wind current to enter from the air intake of the left end low temperature area of the housing and flow through the control panel and controller and current conversion module (when implementing, the current conversion module is the rectifier bridge or inverter), enter the high temperature area of right end through the baffle, its improvement lies in, the high temperature area of right end is set up an engine outer casing outside the engine main body at intervals again, the hand-pulling disk fan as the wind flow power locates inside the opening of left end of engine outer casing, make the wind current flow through carburetor and engine cylinder head outside the engine outer casing in the high temperature area, enter the engine outer casing from the opening of left end of engine outer casing, and flow through the muffler from its upper right side after flowing through and cooling the engine, and then flows out of the generator case shell from the air outlet of the silencer to realize the cooling of internal components of the generator.

Therefore, the parts with poor high-temperature resistance in the digital generator are separated into a low-temperature area, the parts capable of bearing high temperature are separated into a high-temperature area, and the parts in the two areas are sequentially cooled according to the requirement of a cooling level by guiding the wind flow path. Therefore, the cooling and heat dissipation effect of the general engine generator is greatly improved integrally, the working stability is improved, and the service life of the equipment is prolonged. Meanwhile, in the invention, the engine shell is sleeved outside the engine main body at intervals, so that the engine with the maximum heat productivity can be better separated from other components, and meanwhile, the hand-pulling disc fan serving as the wind flow power is positioned inside the opening at the left end of the engine shell, so that the wind flow can be ensured to finally flow into the engine shell from the opening at the left end of the engine shell in a high-temperature area, and the engine is cooled.

The embodiment 1 is realized by adopting the digital generator shown in fig. 1 (arrows in the drawings indicate the direction of air flow), the digital generator comprises a housing 1, a control panel 2 is arranged at the middle lower part of the left end surface of the inner cavity of the housing 1, a main air inlet 3 is arranged on the housing corresponding to the control panel 2, an oil tank 4 is arranged at the left upper part of the inner cavity of the housing, a controller 5 and a current conversion module 6 are further arranged at the left lower part of the inner cavity of the housing 1, an engine 7 is arranged below the right part of the inner cavity of the housing, a generator 8 is arranged on the engine 7, a hand-pulling disc fan 9 is arranged at the left end of the engine 7, an air filter 10, a carburetor 11, a high-pressure bag 12 and an engine cylinder head 13 are further arranged on the engine, a silencer 14 is arranged above the right end of the inner cavity of the housing and connected with an air outlet 15 at the right end of the housing, a vertical partition 16 arranged in the housing 1 along the width direction is further arranged so that the inner cavity of the housing is divided into a left low-temperature area and a right-temperature area, the control panel 2, the controller 5, the current conversion module 6 and part of the oil tank are arranged at one end of a low-temperature area, and the engine 7 and upper components thereof such as a silencer 14 are arranged at one end of a high-temperature area; an engine shell 17 is sleeved outside the engine body at intervals, the air filter 10, the carburetor 11, the high-pressure bag 12 and the engine cylinder head 13 are all installed outside the engine shell 17, the hand-pulling disc fan 9 serving as wind power is located inside an opening at the left end of the engine shell 17, and the upper portion of the right end of the engine shell 17 is communicated with the silencer 14.

Wherein, the upper end of the machine case shell 1 is also provided with a handle 18. The whole mobile phone is convenient to carry.

The whole vertical partition plate 16 is in a vertical plate shape and is arranged at the position below the middle part of the oil tank 4 along the width direction, the lower end and the two ends in the width direction of the vertical partition plate 16 are connected with the bottom surface of the inner cavity of the case shell 1 and the front and rear inner side walls, an air inlet 19 is arranged between the upper end of the vertical partition plate 16 and the lower surface of the oil tank, an air passing interval is reserved between the right side surface of the vertical partition plate 16 and the opening at the left end of the engine shell 17, the carburetor 11 is arranged at the position above the left end of the engine shell 17, and the air filter 10 is arranged at the position below the right end of the engine shell.

Wherein, an interval for air flow to pass is reserved between the left end and the upper end surface of the oil tank 4 and the case shell 1, and the engine cylinder head 13 is positioned at the position which is opposite to the upper surface of the middle part of the engine 7 and the right end of the oil tank 4 in an inclined downward way.

In this embodiment, the upper end of the vertical partition 16 is connected to the lower surface of the oil tank 4, the upper end of the vertical partition 19 is provided with a notch to form an air inlet 19, and the notch is arranged opposite to the right carburetor 11.

Therefore, the air flow can be better controlled to pass through the air passing opening and be better cooled by the carburetor, and the cooling effect on important parts is improved. As another embodiment, a gap is reserved between the whole upper end of the vertical partition plate and the lower surface of the oil tank, and the air passing opening is formed. This facilitates installation.

In this embodiment, a groove 20 is formed on the left end surface and the upper end surface of the mailbox in a penetrating manner from left to right, and the outlet at the right end of the groove 20 is arranged opposite to the direction of the high-pressure bag 12 on the engine cylinder body.

Thus, the groove enables the space between the position and the machine case to be increased, so that a part of the air flow of the path can be intensively exhausted from the groove and the cooling effect on the engine cylinder block and a high-pressure bag on the engine cylinder block is improved. Wherein, the high pressure package on carburetor and the engine cylinder block is arranged in a staggered way in the width direction of the engine case. Therefore, the two air cooling path channels can better ensure the concentrated cooling effect on the important component carburetor and the high-pressure bag respectively, and the reduction of the cooling effect caused by mutual interference is avoided.

Wherein, control panel 1 installs on 1 left end terminal surface of casing, is provided with the control panel air intake on the casing that control panel 2 corresponds as main air intake 3.

The controller 5 and the current conversion module 6 are vertically installed on the lower bottom surface of the cabinet shell 1 at the front end of the air inlet of the control panel at intervals in parallel, and the lower bottom surface of the cabinet shell where the controller 5 and the current conversion module 6 are located is further provided with an air inlet of the controller current conversion module as a secondary air inlet 21.

Wherein, the lower part of the right end of the oil tank 4 is provided with an overall concave part which is concave upwards, the concave part is positioned at the right side of the vertical partition plate 16 and forms a wind flow convergence area chamber which is enlarged in space on the wind flow path.

In this embodiment, the generator 8 is installed at the right end of the engine 7, and the generator air inlet 22 is also arranged on the right end face of the housing 1 and can be supplied with air by a motor fan in the generator.

In this embodiment, the vertical partition 16 is an independent vertical partition and is installed and fixed in the inner cavity of the chassis housing.

Thus, the vertical partition plate is convenient to manufacture and install. As another possible embodiment, the vertical partition may be an integrated vertical partition integrated with the controller or the current conversion module. This saves the number of components and costs.

In this embodiment, a reflective layer is attached to the right side surface of the vertical partition 16.

In this embodiment, the reflective layer is a tin-platinum material layer.

The difference between the embodiment 2 and the embodiment 1 is that the digital generator shown in fig. 2 is adopted. The digital generator shown in fig. 2 is largely the same as the digital engine shown in fig. 1, except that the generator is installed at a different position. In the digital generator shown in fig. 2, the generator is installed at the left end of the engine (not shown in the figure), while the main shaft of the engine rotatably penetrates out of the engine housing rightwards and is installed with the auxiliary fan 8, and the right end face of the housing is also provided with an auxiliary air port 22 facing the auxiliary fan 8.

Embodiment 3, the difference between this embodiment 3 and embodiment 1 is that the digital generator shown in fig. 3 and 4 is used. The digital generator shown in fig. 3 comprises a cabinet 1, a control panel 2 is installed at the middle lower part of the left end face of the inner cavity of the cabinet 1, a main air inlet 3 is arranged on the cabinet corresponding to the control panel 2, an oil tank 4 is installed at the left upper part of the inner cavity of the cabinet, a controller 5 and a current conversion module 6 (when in use, the current conversion module is a rectifier bridge or an inverter) are also installed at the left lower part of the inner cavity of the cabinet 1, an engine 7 is installed below the right part of the inner cavity of the cabinet, an electric generator 8 is installed on the engine 7, a hand-pulling disc fan 9 is arranged at the left end of the engine 7, an air filter 10, a carburetor 11, a high-pressure bag 12 and an engine cylinder head 13 are also installed on the engine, a silencer 14 is installed above the right end of the inner cavity of the cabinet and connected with an air outlet 15 at the right end of the cabinet, a vertical clapboard 16 arranged along the width direction is also arranged in the cabinet 1 so that the inner cavity of the cabinet is divided into a left low-temperature area and a right-temperature area, the control panel 2, the controller 5, the current conversion module 6 and part of the oil tank are arranged at one end of a low-temperature area, and the engine 7 and upper components thereof such as a silencer 14 are arranged at one end of a high-temperature area; an engine shell 17 is sleeved outside the engine body at intervals, the air filter 10, the carburetor 11, the high-pressure bag 12 and the engine cylinder head 13 are all installed outside the engine shell 17, the hand-pulling disc fan 9 serving as wind power is located inside an opening at the left end of the engine shell 17, and the upper portion of the right end of the engine shell 17 is communicated with the silencer 14.

The carburetor 11 and the engine cylinder body 13 are mounted on the upper portion of the engine shell 17 and located at the upper right side of the horizontal partition plate 24, and the air filter 10 is mounted below the right end of the engine shell 17 and located below the horizontal partition plate 24.

Wherein, the left end of the horizontal clapboard 24 is fixed on the vertical clapboard 16, the right end is connected with the upper end of the left side of the engine shell, and the front end and the rear end are connected with the front side and the rear side of the inner cavity of the engine shell 1.

When the partition plate is implemented, the vertical partition plate and the horizontal partition plate can be formed by one or more independent parts (newly added parts), other parts (such as a current conversion module and the like) can be modified, one or more parts can be modified, and the same partition effect can be achieved.

In this embodiment, the upper end of the vertical partition 16 is connected to the lower surface of the oil tank 4, the upper end of the vertical partition 19 is provided with a notch and forms an air inlet 19, and the notch is arranged opposite to the right carburetor 11 and the high pressure bag on the engine cylinder block.

Therefore, the air flow can be better controlled to pass through the air passing opening and better cool the carburetor and the high-pressure bag, and the cooling effect on important parts is improved. As another embodiment, a gap is reserved between the whole upper end of the vertical partition plate and the lower surface of the oil tank, and the air passing opening is formed. This facilitates installation.

Wherein, supporting legs 20 are arranged between the lower end of the engine shell and the lower surface of the inner cavity of the engine shell and form an interval.

Therefore, the air flow of the air flow path below the oil tank can better pass through the air passing opening and flow to the right, and the air flow is better merged with the air flow of the path at the upper end of the oil tank and then flows to the right along the upper part of the high-temperature chamber to form a circulation.

In this embodiment 3, the generator 8 is installed at the right end of the engine 7, and the end face of the right end of the housing 1 is also provided with a generator air inlet 22 over the generator and can supply air by means of a motor fan in the generator.

This enables better cooling of the generator. During implementation, a second partition part can be additionally arranged at the fan of the generator according to requirements so as to adjust the air flow direction entering from the air inlet of the generator. In addition, in other embodiments, the engine can be arranged at the left end of the engine, the main shaft of the engine can rotatably penetrate out of the engine shell rightwards, an auxiliary fan is arranged, and an auxiliary air port is arranged on the right end face of the engine shell and is opposite to the auxiliary fan. Like this, can rely on auxiliary fan air inlet or air-out, improve the cooling effect to quick-witted case shell internals.

In this embodiment 3, the vertical partition 16 is an independent vertical partition and is installed and fixed in the inner cavity of the chassis housing.

In this embodiment 3, the reflective layer is a tin-platinum material layer.

Wherein, the middle parts of the front side and the back side of the inner cavity of the case shell 1, which correspond to the upper end part of the engine shell, are respectively provided with a front boss part 25 and a back boss part 26 which are integrally and inwards protruded along the horizontal direction.

Meanwhile, the structural forms of the front boss part and the rear boss part can be set in such a way that the shapes of the inner side faces of the front boss part and the rear boss part are set to be consistent with the concave-convex shapes of the engine shells opposite to the front boss part and the rear boss part (the inner side faces of the front boss part and the rear boss part are only linear in the figure 4), and meanwhile, the distance between the inner side faces of the front boss part and the rear boss part and the corresponding engine shells is uniformly increased from left to right. Therefore, the interference influence on the large-circulation air cooling path caused by air leakage due to irregular shapes of the front side surface and the rear side surface of the engine shell is avoided. And meanwhile, the air flow passing downwards from the two sides of the engine shell is orderly controlled to be gradually improved from left to right, so that the normal circulation of a large-circulation air cooling path is greatly ensured, and the air cooling effect of components at each position at the right end of the inner cavity of the engine shell is ensured. The equilibrium of the inside position everywhere of quick-witted case shell and component cooling effect has been guaranteed to the at utmost, lets the inside each spare part of general purpose engine dispel the heat as required. The whole cooling and heat dissipation effect of the general gasoline engine is improved, and the working stability of the general gasoline engine is improved.

Wherein the front boss part 25 and the rear boss part 26 are located adjacent below the horizontal partition plate 24. The achievement of the above effect is better ensured.

Claims

1. An air-cooled heat dissipation method for a digital generator, which adopts a clapboard to divide the inner cavity of a generator case into a left low-temperature area and a right high-temperature area, guides air flow to enter from an air inlet of the left low-temperature area of the case, then flows through a control panel, a controller and a current conversion module, and then enters into the right high-temperature area through the clapboard, is characterized in that an engine shell is sleeved outside the engine body in the right high-temperature area at intervals, a hand-pulling disc fan used as the air flow power is positioned inside an opening at the left end of the engine shell, so that the air in the high-temperature area flows into the engine shell from the opening at the left end of the engine shell after flowing through and cooling the engine, flows through a silencer from the upper right of the engine shell, and then flows out of the generator case from an air outlet of the silencer, the cooling of the internal components of the generator is realized.

2. The air-cooled heat dissipation method of a digital generator as recited in claim 1, wherein the digital generator comprises a housing, a control panel is installed at the lower middle portion of the left end surface of the inner cavity of the housing, a main air inlet is provided on the housing corresponding to the control panel, an oil tank is installed at the upper left portion of the inner cavity of the housing, a controller and a current conversion module are further installed at the lower left portion of the inner cavity of the housing, an engine is installed below the right portion of the inner cavity of the housing, a generator is installed on the engine, a hand-pulled disk fan is provided at the left end of the engine, an air filter, a carburetor, a high-pressure bag and an engine cylinder head are further installed on the engine, a muffler is installed above the right end of the inner cavity of the housing and connected with an air outlet at the right end of the housing, a vertical partition board is further arranged in the housing along the width direction so that the inner cavity of the housing is divided into a low-temperature area at the left side and a high-temperature area at the right side, the control panel, the controller, the current conversion module and part of the oil tank are arranged at one end of a low-temperature area, and the engine and the upper components thereof such as a silencer are arranged at one end of a high-temperature area; the engine comprises an engine body, an air filter, a carburetor, a high-pressure bag and an engine cylinder head, wherein the engine body is sleeved with an engine shell at intervals, the air filter, the carburetor, the high-pressure bag and the engine cylinder head are all arranged outside the engine shell, a hand-pulling disc fan serving as airflow power is located inside an opening at the left end of the engine shell, and the upper portion of the right end of the engine shell is communicated with a silencer.

3. The air-cooled heat dissipation method for digital generator as defined in claim 2, wherein said vertical partition is a vertical plate and is installed at a position below the middle portion of the oil tank along the width direction, the lower end and both ends of the vertical partition are connected to the bottom surface of the inner cavity of the housing and the front and rear inner side walls, an air inlet is provided between the upper end of the vertical partition and the lower surface of the oil tank, an air gap is provided between the right side surface of the vertical partition and the opening at the left end of the engine housing, the carburetor is installed at a position above the left end of the engine housing, and the air filter is installed at a position below the right end of the engine housing.

4. The air-cooled heat dissipation method for digital generator as defined in claim 3, wherein a space for air to flow through is provided between the left and upper end surfaces of the oil tank and the casing of the engine, and the cylinder head of the engine is located at a position diagonally opposite to the upper surface of the middle portion of the engine and the right end of the oil tank.

5. The air-cooled heat dissipation method of the digital generator as recited in claim 3, wherein a gap is left between the whole upper end of the vertical partition plate and the lower surface of the oil tank to form the air passing opening;

or the upper end of the vertical partition board is connected with the lower surface of the oil tank, the upper end of the vertical partition board is provided with a notch and forms an air passing port, and the notch is arranged right opposite to the right carburetor.

6. The air-cooled heat dissipation method for digital generator as recited in claim 3, wherein the control panel is installed on the left end surface of the housing, and the housing corresponding to the control panel is provided with a control panel air inlet as a main air inlet;

the controller and the current conversion module are vertically arranged on the lower bottom surface of the case shell at the front end of the air inlet of the control panel at intervals in parallel, and the lower bottom surface of the case shell where the controller and the current conversion module are arranged is also provided with an air inlet of the controller current conversion module as a secondary air inlet;

the lower part of the right end of the oil tank is provided with an integrally upwards sunken part which is positioned on the right side of the vertical partition plate and forms a wind flow converging area chamber which is enlarged in space on a wind flow flowing path.

7. The air-cooled heat dissipation method for digital generator as recited in claim 6, wherein the generator is installed at the right end of the engine, the right end face of the housing case is further provided with a generator air inlet facing the generator and can be fed by a motor fan in the generator;

or the generator is arranged at the left end of the engine, the main shaft of the engine can rotatably penetrate out of the shell of the engine rightwards and is provided with an auxiliary fan, and an auxiliary air port is arranged on the end face of the right end of the shell of the engine and is just opposite to the auxiliary fan.

8. The air-cooled heat dissipation method for digital generator as recited in claim 6, wherein the vertical partition is a stand-alone vertical partition and is installed and fixed in the inner cavity of the chassis housing; or the vertical partition plate is an integrated vertical partition plate integrated with the controller or the current conversion module;

a reflection layer is attached to the right side face of the vertical partition plate.

9. The air-cooled heat dissipation method for digital generator as defined in claim 2, wherein said vertical partition is a vertical plate and is installed at a position below the middle portion of the oil tank along the width direction, the lower end and both ends of the vertical partition are connected to the bottom surface of the inner cavity of the housing and the front and rear inner side walls, an air inlet is provided between the upper end of the vertical partition and the lower surface of the oil tank, a horizontal partition having a shape of a fly leg is further provided between the right side surface of the vertical partition and the upper end of the left side of the engine housing, the carburetor and the engine cylinder block are installed at the upper portion of the engine housing and located at the upper right position of the horizontal partition, and the air filter is installed at a position below the right end of the engine housing and located below the horizontal partition.

10. The air-cooled heat dissipation method for digital generator as recited in claim 9, wherein the left end of the horizontal partition is fixed on the vertical partition, the right end is connected with the upper end of the left side of the engine housing, and the front and rear ends are connected with the front and rear sides of the inner cavity of the housing;

an interval for air flow to pass is reserved between the left end and the upper end surface of the oil tank and the case shell, and the cylinder head of the engine is positioned at the position, opposite to the upper surface of the middle part of the engine and the right end of the oil tank, in an inclined downward mode;

the upper end of the vertical partition board is connected with the lower surface of the oil tank, the upper end of the vertical partition board is provided with a notch and forms an air passing port, and the notch is arranged right opposite to the right carburetor and the position of a high-pressure bag on an engine cylinder body;

supporting legs are arranged between the lower end of the engine shell and the lower surface of the inner cavity of the engine box shell to form an interval;

the middle parts of the front side surface and the rear side surface of the inner cavity of the case shell, which correspond to the upper end part of the engine shell, are respectively provided with a front boss part and a rear boss part which are integrally and inwards protruded along the horizontal direction.