Purging assembly, generator and vehicle

Abstract

The utility model provides a purging assembly, a generator and a vehicle, the purging assembly is suitable for cleaning blockages on a protective cover of the generator, the purging assembly comprises an airflow channel extending into the generator, the airflow channel comprises an air inlet section and an air outlet section, and the air inlet section communicates with an air source; the plurality of air outlet sections are communicated with the air inlet section, and air outlets of the plurality of air outlet sections face different parts, provided with the vent holes, of the protective cover respectively, so that the air outlet sections can divide the purging airflow into a plurality of concentrated airflow and blow the concentrated airflow to different parts; according to the arrangement mode, a plurality of streams of high-speed flowing and concentrated air flows are used for blowing different local parts, provided with the vent holes, of the protective cover respectively, blockages on the protective cover can be disengaged from the vent holes under the washing of the air flows, then the blockages on the protective cover of the generator can be effectively cleaned, the smoothness of a heat dissipation channel of the generator is ensured, and the service life of the generator is prolonged. And the generator is prevented from running due to overheating.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of generators, in particular to a blowing assembly, a generator and a vehicle. BACKGROUND

[0002] A generator is a device that converts mechanical energy into electrical energy. Because the generator generates a large amount of heat during operation, in order to avoid burning of the generator, the generator needs to be designed with a heat dissipation hole, for example, a ventilation hole on the protective cover of the generator.

[0003] When the generator in the related art is applied in a harsh environment, for example, when the generator is applied to a harvester in agricultural machinery, a large amount of straw and dust and other sundries exist in the working environment, and the above sundries are easy to block the ventilation hole of the generator for forming a heat dissipation air duct, thereby causing poor heat dissipation of the generator, and even causing the generator to burn out, and in severe cases, it can also cause a fire. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a blowing assembly which can effectively clean the blockage on the protective cover of the generator, thereby ensuring the smoothness of the heat dissipation channel and the heat dissipation effect of the heat dissipation structure of the generator. In addition, the present application also provides a generator comprising the above blowing assembly, and a vehicle comprising the above generator.

[0005] In order to achieve the above purpose, the present application provides the following technical solutions:

[0006] A blowing assembly suitable for cleaning the blockage on the protective cover of a generator, the blowing assembly comprising an airflow channel extending into the generator, the airflow channel comprising:

[0007] an air inlet section in communication with an air source;

[0008] a plurality of air outlet sections in communication with the air inlet section, and the air outlet openings of the plurality of air outlet sections respectively face different parts of the protective cover provided with ventilation holes, so that the air outlet sections can divide the blowing airflow into a plurality of concentrated airflows and blow them to the different parts.

[0009] Optionally, the flow area of the air inlet section is greater than the sum of the flow areas of all the air outlet sections.

[0010] Optionally, the airflow channel further comprises an intermediate section for communicating the air inlet section and the air outlet section, and the flow area of the air inlet section, the flow area of the intermediate section and the flow area of the air outlet section decrease in turn.

[0011] Optionally, the airflow channel is formed by a gas guide pipe, and the gas guide pipe comprises:

[0012] an air inlet pipe, penetrating through the housing of the generator and forming the air inlet section;

[0013] an intermediate pipe, in communication with the air inlet pipe and forming the intermediate section, and the intermediate pipe is annular and attached to the inner wall of the housing; and

[0014] a plurality of air outlet pipes, each connected to and in communication with the intermediate pipe to form the air outlet section, and the intermediate pipe is arranged along the circumferential direction of the annular portion of the housing, and all the air outlet pipes are distributed along the circumferential direction of the annular portion of the housing so that the air outlets of all the air outlet pipes are directed towards different parts of the protective cover located at the end of the housing.

[0015] Optionally, all the air outlet pipes are arranged in parallel to the axial direction of the annular portion.

[0016] Optionally, one end of the air outlet pipe close to the air outlet is provided with a bending portion for adjusting the direction of the air outlet.

[0017] Optionally, the air flow channel is a through hole formed in the inner wall of the protective cover.

[0018] Optionally, the gas source is a continuous gas source, and the purging assembly comprises a control structure, and the control structure comprises:

[0019] a controller;

[0020] a shut-off valve connected to the controller and arranged on a communication pipeline in communication with the air flow channel and the gas source, and capable of controlling the opening and closing of the communication pipeline; and

[0021] a monitoring member in signal connection with the controller and capable of monitoring the temperature inside the generator and / or the pressure inside the generator;

[0022] wherein the controller is capable of controlling the opening and closing state of the shut-off valve according to the signals transmitted by the monitoring member.

[0023] A generator, comprising:

[0024] a housing comprising at least an annular portion;

[0025] a protective cover arranged at one end of the annular portion;

[0026] a motor body arranged inside the housing;

[0027] a purging assembly according to any one of the above.

[0028] A vehicle comprising a gas source and the above-mentioned generator.

[0029] The blowing assembly provided in the application is used in the working process. The gas source actively or passively generates a blowing airflow. The blowing airflow is divided into multiple airflows under the action of the airflow channel. The multiple airflows blow to different parts of the protective cover provided with air holes in a concentrated airflow state under the action of the flow guide and the constraint of the different air outlet sections. In this way, the blockage on the protective cover of the generator is removed under the scouring of the blowing airflow, thereby effectively cleaning the blockage on the protective cover of the generator, ensuring the smoothness of the heat dissipation channel of the generator, and avoiding the overheating of the generator. In the above process, the blowing airflow is divided into multiple concentrated airflows under the action of the air outlet section, and the multiple concentrated airflows blow to different parts of the protective cover of the generator. In this way, on the one hand, the concentrated airflow has a strong scouring effect on the protective cover, thereby improving the cleaning effect. On the other hand, the multiple concentrated airflows can effectively improve the action range of the blowing airflow, thereby further improving the cleaning effect. In addition, in the above process, due to the air outlet section, the action range of the blowing airflow is more concentrated. In other words, under the action of the air outlet section, the blowing airflow can act on the protective cover more accurately, and will not act on the internal components (such as the rotor structure) of the generator, thereby avoiding the internal failure of the generator caused by the impurities such as oil stains in the blowing airflow. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by the drawings provided by the person skilled in the art without creative labor.

[0031] Figure 1 A structural schematic diagram of an electrode including a blowing assembly provided in an embodiment of the present application.

[0032] In Figure 1 which:

[0033] 1-air inlet section, 2-air outlet section, 3-intermediate section, 4-housing, 5-protective cover;

[0034] 201-bent part. DETAILED DESCRIPTION

[0035] The embodiment of the present application provides a blowing assembly, a generator and a vehicle.

[0036] With reference to the drawings and embodiments disclosed herein, it is obvious that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments disclosed herein, all other embodiments obtained by a person of ordinary skill in the art without creative effort shall fall within the scope of the present application.

[0037] First of all, it should be pointed out that the blowing assembly in the embodiments of the present application is suitable for cleaning the blockage (including but not limited to straw, dust and oil stains, etc.) on the protective cover 5 of the generator. The protective cover 5 described above is one of the safety components of the generator, which cooperates with the shell 4 of the generator (the shell 4 of the generator generally includes a front shell and a rear shell, which can also be referred to as a front end cover and a rear end cover, and the protective cover 5 is arranged on the rear shell and located at the end of the rear shell away from the front shell) to form an inner cavity for accommodating components such as stator and rotor of the generator, so as to protect the components such as stator and rotor. In addition, the protective cover 5 is also provided with a ventilation hole, which is used to form a heat dissipation channel of the generator to avoid the generator from being unable to operate normally due to overheating.

[0038] Further, in order to avoid impurities entering the inside of the generator through the ventilation hole on the protective cover 5 and ensure the heat dissipation effect, a plurality of ventilation holes with small size can be arranged on the protective cover 5. However, the small size of the ventilation hole makes it easy to be blocked by impurities, which in turn affects the heat dissipation effect of the generator. Based on the above, the blowing assembly in the embodiments of the present application introduces a blowing airflow into the inside of the generator (i.e. the inner cavity of the shell 4), controls the blowing airflow to blow towards the ventilation hole of the protective cover 5, the flow direction of the airflow is from the inside of the shell 4 to the outside of the shell 4, and uses the blowing airflow of the high-speed flow channel to flush the blockage in the ventilation hole, so as to flush the blockage to the outside of the generator, thereby achieving the technical purpose of cleaning the blockage on the protective cover 5 of the generator, and ensuring the heat dissipation effect of the generator.

[0039] Specifically, as shown in Figure 1 The blowing assembly in the embodiments of the present application includes an airflow channel extending into the inside of the generator (i.e. the inner cavity of the shell 4), which is used to guide the blowing airflow to ensure that the blowing airflow can act on the target area (i.e. the area on the protective cover 5 of the generator where the ventilation hole is arranged). The forming mode of the airflow channel can be to arrange a gas guide pipe in the inner cavity of the shell 4 of the generator, or to open a through hole on the shell 4, and the embodiments of the present application do not make specific limitation on this.

[0040] Continuing as shown in Figure 1As shown, the airflow passage includes an air inlet section 1 and an air outlet section 2, wherein the air inlet section 1 is a part of the airflow passage that introduces the purge airflow into the housing 4, that is, the air inlet in the air inlet section 1 is the air inlet of the airflow passage, and in a specific implementation, the air inlet section 1 is in communication with a gas source capable of generating the purge airflow through the air inlet. It should be noted that according to different use scenarios, the air inlet can be provided with different specifications as needed, so as to facilitate the communication between the airflow passage and the gas source. The air outlet section 2 is a part of the airflow passage that discharges the purge airflow, and the air outlet of the air outlet section 2 is also the air outlet of the airflow passage. In this embodiment, the air outlet section 2 is used to control the flow direction of the purge airflow flowing out of the airflow passage to be towards the region provided with the air hole, and to keep the purge airflow flowing out of the airflow passage concentrated and not dispersed; in this way, the purge airflow has a greater scouring effect on the blockage on the protective cover 5, thereby improving the cleaning effect of the purge assembly on the blockage. In addition, as shown, the air outlet section 2 is provided with a plurality of air outlet sections 2, and the plurality of air outlet sections 2 are in communication with the air inlet section 1. Further, the air outlets of the plurality of air outlet sections 2 are respectively directed towards different parts of the protective cover 5 provided with the air hole, so that the air outlet section 2 can divide the purge airflow into a plurality of concentrated airflows and blow them towards the different parts mentioned above. Figure 1

[0041] It should be noted that the air outlets of the plurality of air outlet sections 2 mentioned above are respectively directed towards different parts of the protective cover 5 provided with the air hole, which means that the purge airflows flowing out of different air outlet sections 2 have different action regions on the protective cover 5 (here, the different action regions can mean that the purge airflows flowing out of different air outlet sections 2 have no intersection or partially overlap on the protective cover 5), and all act on the region of the protective cover 5 provided with the air hole. Further, regarding the number of air outlet sections 2, the present application does not make a specific limitation, and in a specific implementation, it can be adaptively designed as needed, and in a preferred embodiment, the number of air outlet sections 2 should satisfy that the union of the action regions of the plurality of purge airflows on the protective cover 5 covers the region of the protective cover 5 provided with the air hole.

[0042] It should be further noted that the concentrated airflow mentioned above means an airflow that remains concentrated or does not spread over a large area.

[0043] ​The above blowing assembly works, and the gas source actively or passively generates a blowing airflow. The gas source actively generates a blowing airflow, which means that the gas source generates an airflow to the airflow channel under the control of the operator. The gas source passively generates a blowing airflow, which means that the blowing airflow is a byproduct generated by the operator when performing other operations. For example, the gas source is the brake system of the vehicle, and the blowing airflow is the gas that needs to be discharged into the atmosphere during the brake operation of the operator. The blowing airflow is divided into multiple streams under the action of the airflow channel. The multiple blowing airflows blow to different parts of the protective cover 5 provided with air holes under the guidance and constraint of the different air outlet sections 2 in the form of concentrated airflow. In this way, the blockage on the protective cover 5 of the generator is removed under the scouring of the blowing airflow, thereby effectively cleaning the blockage on the protective cover 5 of the generator, ensuring the smoothness of the heat dissipation channel of the generator, and avoiding the overheating of the generator. In the above process, the blowing airflow is divided into multiple concentrated airflows under the action of the air outlet section 2, and the multiple concentrated airflows blow to different parts of the protective cover 5 of the generator. On the one hand, the concentrated airflow has a strong scouring effect when acting on the protective cover 5, thereby improving the cleaning effect. On the other hand, the multiple concentrated airflows can effectively improve the action range of the blowing airflow, thereby further improving the cleaning effect. In addition, in the above process, due to the arrangement of the air outlet section 2, the action area of the blowing airflow is more concentrated. In other words, under the action of the air outlet section 2, the blowing airflow can act on the protective cover 5 more accurately, without acting on the internal components (such as the rotor structure) of the generator, thereby avoiding internal faults of the generator caused by impurities such as oil stains in the blowing airflow.

[0044] In a preferred embodiment, the flow area of the air inlet section 1 is greater than the sum of the flow areas of all the air outlet sections 2. In this way, the flow rate of the blowing airflow flowing from the air inlet section 1 into the air outlet section 2 increases, thereby improving the concentration of the blowing airflow flowing out of the air outlet section 2, making the action area of the blowing airflow more accurate. At the same time, since the flow rate of the blowing airflow is faster, the blowing airflow has stronger impact force on the blockage on the protective cover 5, thereby improving the cleaning effect of the blowing assembly.

[0045] Of course, the above is only one preferred arrangement of the air inlet section 1 and the air outlet section 2, but the embodiments of the present application are not limited thereto. In specific implementation, when the flow rate of the blowing airflow entering the air inlet section 1 is sufficient, the flow area of the air inlet section 1 can also be equal to the sum of the flow areas of all the air outlet sections 2, or even the flow area of the air inlet section 1 can be less than the sum of the flow areas of all the air outlet sections 2.

[0046] Further, as shown in FIG. 6, the air inlet section 1 and the air outlet section 2 can be arranged in a staggered manner. Figure 1As shown, the gas flow channel further comprises an intermediate section 3, which is a transition section arranged between the gas inlet section 1 and the gas outlet section 2 and used to communicate the gas inlet section 1 and the gas outlet section 2. Further, the flow area of the gas inlet section 1, the flow area of the intermediate section 3 and the flow area of the gas outlet section 2 are sequentially reduced. In this way, under the transition effect of the intermediate section 3, the flow area of the gas flow channel gradually reduces in stages. On the one hand, this is conducive to the stability of gas flow and reduces the possibility of vortex and turbulent flow formation. On the other hand, this helps to reduce the energy consumption and pressure drop of the gas when flowing through the gas flow channel, and improves the overall efficiency of the fluid system.

[0047] Further, on the basis that the gas flow channel comprises the intermediate section 3 and the gas outlet section 2 communicates with the gas inlet section 1 through the intermediate section 3, in some embodiments, the position of the intermediate section 3 that communicates with the gas inlet section 1 is a first position, different gas outlet sections 2 communicate with different positions of the intermediate section 3, and the distances between the different positions and the first position are different, and the diameter of the gas outlet section 2 is inversely proportional to the distance. This arrangement is conducive to balancing the amount of gas entering different gas outlet sections 2, thereby avoiding low gas flow in the distal gas inlet section 1 (i.e., the gas inlet section 1 that is far away from the gas inlet section 1), which affects the overall purging effect of the purging assembly.

[0048] In optional embodiments, the gas flow channel is formed by a gas guide pipe. In this arrangement, since the gas flow channel is an independent structure, in specific implementation, the gas flow channel can be produced separately and then assembled in the housing 4 of the generator. In this way, it is more conducive to the realization of complex flow channel design, and further more conducive to the rationality of the design of the gas flow channel.

[0049] In an exemplary embodiment, as shown in FIG. 1, the gas flow channel comprises a gas inlet section 1, a gas outlet section 2 and an intermediate section 3 arranged between the gas inlet section 1 and the gas outlet section 2. Figure 1As shown, the shell 4 of the generator includes an annular portion (which is a component of the rear shell described above), the protective cover 5 of the generator is arranged at the end of the annular portion (i.e. the protective cover 5 is arranged on the rear shell and located at the end of the rear shell away from the front shell), and the air guide pipe includes an air inlet pipe, an intermediate pipe and an air outlet pipe, wherein the air inlet pipe penetrates the shell 4 of the generator (specifically the rear shell) radially and forms the air inlet section 1; the intermediate pipe is in communication with the air inlet pipe and forms the intermediate section 3, and the intermediate pipe is annular and attached to the inner wall of the shell 4, and can be fixed to the inner wall of the shell 4 by welding; in this arrangement, the air inlet pipe penetrates the shell 4 of the generator, which can form axial positioning between the air guide pipe and the shell 4, and in the radial direction of the shell 4 of the generator, the annular intermediate pipe always abuts the inner wall of the shell 4, thereby forming radial positioning between the air guide pipe and the shell 4. In this way, the present embodiment can effectively improve the reliability of the connection between the air guide pipe and the shell 4 by the cooperation of the air inlet pipe and the shell 4 and the cooperation of the intermediate pipe and the shell 4. In addition, in the present embodiment, a plurality of air outlet pipes are provided, and the plurality of air outlet pipes are connected to and in communication with the intermediate pipe to form the air outlet section 2, and the intermediate pipe is arranged along the circumference of the annular portion of the shell 4, and all the air outlet pipes are distributed along the circumference of the annular portion of the shell 4, so that the air outlets of all the air outlet pipes are directed towards different parts of the protective cover 5 located at the end of the shell 4.

[0050] Further, all the air outlet pipes are distributed in parallel to the axial direction of the annular shell 4. In this way, the radial space occupation of the air outlet pipes inside the shell 4 can be reduced, thereby avoiding interference between the air outlet pipes and the rotor and other structures inside the generator, and also facilitating the optimization of the space inside the generator.

[0051] Further, one end of the air outlet pipe close to the air outlet is provided with a bending portion 201 for adjusting the direction of the air outlet. In specific implementation, the bending of the bending portion 201 can adjust the action area of the purge gas flow on the protective cover 5, so that the action area of the purge gas flow from the air outlet section 2 on the protective cover 5 is not limited by the arrangement position of the air outlet section 2, thereby improving the adjustable space of the arrangement position of the air outlet section 2 and facilitating the rationality of the arrangement position of the air outlet section 2.

[0052] In an optional embodiment, the air flow channel is a through hole formed in the inner wall of the protective cover 5. In this way, it is beneficial to simplify the internal structure of the generator, thereby reducing the failure rate of the generator.

[0053] The above-mentioned gas source is a continuous gas supply source in the example embodiment, and the purge assembly comprises a control structure (not shown in the figure) which comprises a controller, a shut-off valve and a monitoring member. The shut-off valve is connected to the controller and arranged on the communication pipeline between the communication flow channel and the gas source, and can control the opening and closing of the communication pipeline. The monitoring member is signal-connected to the controller and can monitor the temperature inside the generator and / or the pressure inside the generator. The controller can control the opening and closing state of the shut-off valve according to the signal transmitted by the monitoring member.

[0054] It should be noted that when the vent hole of the protective cover 5 is blocked, the airflow through the heat dissipation channel of the generator is reduced, which causes the heat generated by the generator to be unable to be discharged in time, and thus the temperature inside the generator will abnormally increase. At the same time, the blocking of the vent hole of the protective cover 5 also causes the exhaust inside the generator to be greater than the intake, and thus the pressure inside the generator abnormally decreases. Based on this, in the embodiment, the monitoring data of the monitoring member (i.e. the temperature data inside the generator and / or the pressure data inside the generator) can be used as a basis for determining whether the vent hole of the protective cover 5 is blocked. Specifically, when the temperature inside the generator abnormally increases and / or the pressure inside the generator abnormally decreases, it is proved that the vent hole of the protective cover 5 may be blocked. At this time, the controller controls the shut-off valve to open the communication pipeline, so that the purge airflow flows through the airflow channel to the protective cover 5, and thus the blockage on the protective cover 5 is cleaned.

[0055] It should be further noted that in specific implementation, the monitoring member can be a temperature sensor and / or a pressure sensor. Preferably, the monitoring member simultaneously comprises a temperature sensor and a pressure sensor, so as to simultaneously monitor the temperature and the pressure inside the generator, and the two groups of data are mutually verified, which is beneficial to improve the reliability of the monitoring member.

[0056] The purge assembly in the above-mentioned embodiment can clean the blockage on the protective cover 5 according to the needs of the generator due to the arrangement of the controller and the monitoring member. This arrangement can not only avoid the overheating of the generator due to the untimely cleaning of the blockage, but also avoid the invalid work of the purge assembly, i.e. when there is no blockage on the protective cover 5 of the generator or the blockage on the protective cover 5 of the generator does not reach the standard for cleaning, the purge assembly is started, and thus the gas in the gas source is wasted.

[0057] It should be understood that the above-mentioned is only a preferred arrangement of the control structure, but the present application is not limited thereto. In specific implementation, the control structure can only comprise a controller and a shut-off valve, i.e. the purge assembly can only be started under the control of the operator.

[0058] The embodiment of the present application provides a generator, which comprises a shell 4, a protective cover 5, a motor body and a purge assembly, the shell 4 at least comprises an annular part, the protective cover 5 is arranged at one end of the annular part, the motor body is arranged in the shell 4, and the purge assembly is the above-mentioned purge assembly. It should be noted that, since the generator comprises the above-mentioned purge assembly, the beneficial effects of the generator caused by the purge assembly are described above, and the present application will not be repeated here.

[0059] In addition, the embodiment of the present application provides a vehicle, which comprises a gas source and the above-mentioned generator, the gas source is a component structure of the vehicle, for example, the gas source is a brake system of the vehicle, and the gas flow for purging the generator is the gas that needs to be discharged into the atmosphere in the process of completing the brake operation by the operator. It should be noted that, since the vehicle comprises the above-mentioned generator, the beneficial effects of the vehicle caused by the generator are described above, and the present application will not be repeated here.

[0060] The basic principle of the present application is described above in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present application are only examples and not limitations, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present application. In addition, the above-mentioned specific details are only for the purpose of example and for the purpose of understanding, and are not limited to the above-mentioned specific details, and the above-mentioned details do not limit the present application to the above-mentioned specific details.

[0061] The block diagram of the device, apparatus, equipment, system involved in the present application is only an illustrative example and is not intended to require or imply that the connection, arrangement and configuration shown in the block diagram must be connected, arranged and configured. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged and configured in any way. Words such as "include", "contain", "have" and the like are open-ended words, which mean "include but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0062] It should also be noted that in the device, equipment and method of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombination should be considered as equivalent solutions of the present application.

[0063] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0064] It should be understood that the limiting words "first", "second", "third", "fourth", "fifth" and "sixth" used in the embodiments description of the present application are only used for more clearly describing the technical solutions, and cannot be used to limit the protection scope of the present application.

[0065] The above description has been presented for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the forms disclosed herein. Although several example aspects and embodiments have been discussed above, those of ordinary skill in the art will appreciate a variety of modifications, alternatives, permutations, additions, and sub-combinations of the described aspects and embodiments.

Claims

1. A purge assembly, characterized by, The application relates to a blowing assembly suitable for cleaning the blockage on the protective cover of a generator, which comprises a gas flow channel extending into the generator, wherein the gas flow channel comprises: an air inlet section in communication with a gas source; a plurality of air outlet sections in communication with the air inlet section, and the air outlet openings of the plurality of air outlet sections are respectively directed towards different parts of the protective cover provided with air holes, so that the air outlet sections can divide the blowing gas flow into a plurality of concentrated gas flows and blow them towards the different parts.

2. The purge assembly of claim 1, wherein, The flow area of the air inlet section is greater than the sum of the flow areas of all the air outlet sections.

3. The purge assembly of claim 2, wherein, The gas flow channel further comprises an intermediate section for connecting the air inlet section and the air outlet sections, and the flow area of the air inlet section, the flow area of the intermediate section and the flow area of the air outlet sections are sequentially reduced.

4. The purge assembly of claim 3, wherein, The gas flow channel is formed by a gas guide pipe, which comprises: an air inlet pipe penetrating through the shell of the generator and forming the air inlet section; an intermediate pipe in communication with the air inlet pipe and forming the intermediate section, and the intermediate pipe is annular and attached to the inner wall of the shell; and a plurality of air outlet pipes connected to and in communication with the intermediate pipe to form the air outlet sections, and the intermediate pipe is arranged along the circumferential direction of the annular part of the shell, and all the air outlet pipes are distributed along the circumferential direction of the annular part of the shell, so that the air outlet openings of all the air outlet pipes are directed towards different parts of the protective cover located at the end of the shell.

5. The purge assembly of claim 4, wherein, All the air outlet pipes are distributed in parallel to the axial direction of the annular part.

6. Purge assembly according to claim 4 or 5, characterized in that The air outlet pipe is provided with a bent part near the air outlet opening for adjusting the direction of the air outlet opening.

7. The purge assembly of claim 3, wherein, The gas flow channel is a through hole formed in the inner wall of the protective cover.

8. The purge assembly of claim 1, wherein, The gas source is a continuous gas source, and the blowing assembly comprises a control structure, which comprises: a controller; a shut-off valve connected to the controller and arranged on a communication pipeline connecting the gas flow channel and the gas source, and capable of controlling the opening and closing of the communication pipeline; and a monitoring member in signal connection with the controller and capable of monitoring the temperature inside the generator and / or the pressure inside the generator; wherein the controller can control the opening and closing state of the shut-off valve according to the signals transmitted by the monitoring member.

9. An electric generator characterized by It comprises: a shell comprising at least an annular part; a protective cover arranged at one end of the annular part; a motor body arranged inside the shell; a blowing assembly as claimed in any one of claims 1-8.

10. A vehicle characterized by comprising: It comprises a gas source and the generator as claimed in claim 9.

Images