CN220447606U

CN220447606U - Ventilation device for motor home

Info

Publication number: CN220447606U
Application number: CN202321206454.5U
Authority: CN
Inventors: 曹钰伟; 殷立威
Original assignee: Jiangsu Leili Motor Co Ltd
Current assignee: Jiangsu Leili Motor Co Ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2024-02-06
Anticipated expiration: 2033-05-18

Abstract

The utility model discloses a ventilation device for a motor home, which comprises: a support housing for fixing to a motor home; a fan assembly including a fan provided on the support housing and a driver for driving the fan to operate; the filter plate comprises an annular framework fixed on the supporting shell and a plurality of filter holes uniformly distributed on the annular framework; the supporting shell is provided with a hollowed-out structure for exposing a plurality of filtering holes; a shield for movably mating with the top of the support housing adapted to form a circumferential barrier to the filter plate; the cover plate comprises a rotating main body in rotating fit with the supporting shell and a trigger piece arranged on the rotating main body and used for pushing the protective cover; the trigger piece is suitable for pushing the protective cover along with the rotation of the rotary main body so as to enable the protective cover to release the circumferential shielding of the filter plate; and the trigger piece is also suitable for releasing pushing of the protective cover along with rotation of the rotary main body so that the protective cover forms circumferential shielding for the filter plate.

Description

Ventilation device for motor home

Technical Field

The utility model relates to the technical field of vehicle accessories, in particular to a ventilation device for a motor home.

Background

The interior of a caravan is generally provided with kitchen ware, bedding and washware, and the space of the caravan is much smaller than that of a normal house, so that a ventilation device is required to keep the air inside the caravan fresh.

In the long-term use process of the ventilation device of the motor home, dust is unavoidably accumulated on the fan blades and the filter plates, if the ventilation device is not regularly cleaned, the ventilation device is difficult to clean air in the motor home, and the ventilation device also has the opposite effect, and bacteria are bred on the fan blades and the filter plates so as to influence the freshness of the air in the motor home.

In the prior art, a filter plate of a ventilation device on a motor home is generally arranged at the upper end or the lower end of a fan in a horizontal mode, for example, a motor home purification ventilator assembly disclosed by publication number CN214984726U comprises a fan blade structure and a dustproof filter element arranged above the fan blade structure; specifically, after the dustproof filter core is used for a long time, the pulling frame can be pulled upwards, the pulling frame drives the dustproof filter frame to move upwards, the dustproof filter frame drives the dustproof filter core to move upwards, and the dustproof filter core drives the positioning slide block to start to move upwards along the positioning groove, so that the dustproof filter core can be taken out rapidly to be cleaned and replaced, and the positioning slide block can be utilized to carry out positioning and installation, so that the dustproof filter core has the effect of purifying air and can be replaced conveniently in later period. For the car as a house purification scavenger fan assembly under this structure, consider waterproof problem, consequently be provided with sealed apron in the top of filter core, this sealed apron is through the effect of positive and negative motor to realize its operation of opening and shutting for the exhaust frame. In this regard, although the waterproof effect can be effectively ensured, the front and back motor needs to be used, and the front and back motor is located at the outer side of the exhaust frame, so that the waterproof problem of the front and back motor needs to be matched with the corresponding structure, and the front and back motor used in the external environment has higher requirements on the overall performance. Therefore, although the car as a house purification scavenger fan assembly under this structure can satisfy the convenience dismantlement and the waterproof problem of filter simultaneously, still need further optimizing in the aspect of its overall structure's simplification, consequently with regard to overall structure, the complexity of structure can bring manufacturing cost's increase on the one hand, and on the other hand still can increase the fault rate of using, even shorten overall structure's life.

Therefore, for the purifying ventilator applied in the motor home, not only the disassembly and cleaning of the filter plate and the effective waterproof realization are considered, but also the simplification of the whole structure is considered, so that the simplification of the structure is reduced.

Disclosure of Invention

The utility model aims to provide a ventilation device for a motor home, which aims to solve the technical problem of simultaneously considering the convenience in assembling and disassembling fan blades and a filter plate.

The ventilation device for the motor home is realized by the following steps:

a ventilation device for a motor home, comprising:

a support housing for fixing to a motor home;

a fan assembly including a fan provided on the support housing and a driver for driving the fan to operate;

the filter plate comprises an annular framework fixed on the supporting shell and a plurality of filter holes uniformly distributed on the annular framework; the support shell is provided with a hollowed-out structure for exposing a plurality of filtering holes;

a shield for movably mating with the top of the support housing adapted to form a circumferential barrier to the filter plate;

the cover plate comprises a rotating main body in rotating fit with the supporting shell and a trigger piece arranged on the rotating main body and used for pushing the protective cover; and a plurality of ventilation grooves are formed on the rotating main body;

the trigger piece is suitable for pushing the protective cover along with the rotation of the rotary main body so as to enable the protective cover to release the circumferential shielding of the filter plate; and the trigger piece is further suitable for releasing pushing of the protective cover along with rotation of the rotary main body so that the protective cover forms circumferential shielding for the filter plate.

In an alternative embodiment of the utility model, the support housing comprises a base for fixing to a caravan and a frame beam mounted on top of the base; wherein the method comprises the steps of

The base is provided with a hollow accommodating cavity penetrating through the top and the bottom of the base; and

the protective cover is movably matched with the frame beam, and the rotating main body is rotatably matched with the base so that the trigger piece is arranged in the accommodating cavity.

In an alternative embodiment of the utility model, the fan is fixed to the end of the frame beam facing the accommodating cavity, and the fan is located in the inner hole of the annular framework.

In an alternative embodiment of the utility model, at least one elastic connection is also provided between the protective cover and the frame beam.

In an alternative embodiment of the utility model, the protective cover comprises a cover body for forming a circumferential shielding for the filter plate and at least one pair of support ribs protruding on the cover body for movably matching with the frame beams; and

the cover body is also integrally connected with a top cover which is used for covering the top end of the supporting shell;

the rotary main body is provided with at least one pair of trigger pieces which are used for being matched with at least one pair of supporting ribs one by one;

each of the support ribs is adapted to extend partially into the receiving cavity to mate with a corresponding trigger member.

In an alternative embodiment of the utility model, the annular skeleton is provided with a yielding groove which is suitable for the supporting rib to pass through along the axial direction of the annular skeleton.

In an alternative embodiment of the utility model, the frame beam is provided with a guide opening which is suitable for the supporting rib to pass through and a guide wall for limiting the movable track of the supporting rib.

In an alternative embodiment of the utility model, the annular framework is in plug-in fit with the inner wall of the frame girder.

In an alternative embodiment of the utility model, the inner wall of the frame beam is provided with a convex guide rib, and the outer side wall of the annular framework is correspondingly provided with a concave guide groove which is suitable for being in plug-in fit with the guide rib; and

and an elastic buckle suitable for supporting one end of the annular framework, which is opposite to the protective cover, is further arranged on the inner wall of the frame beam.

In an alternative embodiment of the utility model, the cavity wall of the accommodating cavity is provided with at least two spigots extending towards the center of the accommodating cavity; and

at least two mounting ports which are suitable for being matched with at least two spigot one-to-one are arranged on the circumferential edge of the rotating main body;

the circumferential edge of the rotating body is further provided with a movable groove suitable for inserting at least two spigots along the rotating track.

In an alternative embodiment of the utility model, the end surface of the triggering piece facing the protective cover comprises a guide inclined surface which is obliquely distributed relative to the rotating main body and a positioning groove which is formed at one end of the guide inclined surface away from the rotating main body and used for pushing the protective cover;

a transition boss is formed between the positioning groove and the guide inclined plane; and

the rotary main body is provided with a limiting boss at one end of the guide inclined surface, which is far away from the positioning groove, and a spacing area is formed between the limiting boss and the guide inclined surface.

In an alternative embodiment of the utility model, the end surface of the rotating body facing away from the protective cover is also provided with a raised torsion part; and

the end face of the rotary main body, which is away from the protective cover, is also provided with at least two indication parts which are respectively in one-to-one correspondence with the at least two spigots along with the rotation of the rotary main body;

each indicating part comprises a first indicating bit and a second indicating bit which are distributed at intervals;

when the spigot corresponds to the first indication position, the trigger piece pushes the protective cover so as to enable the protective cover to release the circumferential shielding of the filter plate;

when the spigot corresponds to the second indication position, the trigger piece releases pushing of the protective cover so that the protective cover forms circumferential shielding for the filter plate.

By adopting the technical scheme, the utility model has the following beneficial effects: firstly, the design of the protective cover realizes the waterproof protection of the filter plate and the supporting shell; secondly, the cover plate is in rotating fit with the supporting shell, and through the rotation of the cover plate relative to the supporting shell, the trigger piece can be suitable for pushing the protective cover along with the rotation of the rotating main body so as to enable the protective cover to release the circumferential shielding of the filter plate; alternatively, the trigger is adapted to release the pushing of the shield with rotation of the rotating body to cause the shield to form a circumferential barrier to the filter plate. With such a structure, the ventilation state of the whole ventilation device can be switched according to the need.

In addition, the mode of the transition plate and the supporting shell are in plug-in fit, the disassembly is convenient, the filter plate comprises an annular framework fixed on the supporting shell, namely, the integral filter plate is axially assembled in the supporting shell, and in the structure, even if the protective cover is opened and ventilated, foreign matters and the like do not fall on the filter plate. Even forget to close the protective cover in rainy days, rainwater can be prevented from entering the ventilation device through the filtering holes in the filtering plate to a large extent.

Drawings

FIG. 1 is a schematic view of a protective cover shielding filter plate of a ventilation device for a motor home;

FIG. 2 is a schematic view of the protective cover of the ventilation device for a motor home of the present utility model, which is configured to release the shielding of the filter plate;

FIG. 3 is an exploded view of the ventilation device for a motor home according to the present utility model;

FIG. 4 is a schematic structural view of a protective cover of a ventilation device for a motor home according to the present utility model;

FIG. 5 is a first perspective structural schematic view of the support housing of the ventilation device for an electric motor home of the present utility model;

FIG. 6 is a second perspective structural schematic view of the support housing of the ventilation device for an electric motor home of the present utility model;

FIG. 7 is a schematic view showing a structure of a filter plate of the ventilation device for a motor home according to the present utility model;

FIG. 8 is a first view structural schematic diagram of a cover plate of the ventilation device for a motor home according to the present utility model;

FIG. 9 is a second view structural schematic diagram of a cover plate of the ventilation device for an automobile in the present utility model;

fig. 10 is a schematic view showing a structure in which a mounting port of a cover plate of the ventilation device for an automobile for a house of the present utility model is opposed to a spigot of a support case;

FIG. 11 is a schematic cross-sectional view of a protective cover of the ventilation device for a motor home of the present utility model shielding a filter plate;

FIG. 12 is a schematic cross-sectional view of the hood of the car park ventilation device of the present utility model with the filter panel unobstructed;

FIG. 13 is a schematic view of a matching structure of a positioning groove and a support rib when a protective cover of the ventilation device for the motor home releases shielding of a filter plate;

FIG. 14 is a schematic view of the cooperation structure of the trigger piece and the supporting rib in the process of releasing the shielding of the filter plate by the protective cover of the ventilation device for the motor home;

FIG. 15 is a schematic view of a cooperation structure between an interval and a support rib when a filter plate is shielded by the ventilation device for a motor home;

fig. 16 is a schematic view showing the cooperation structure of the elastic buckle and the filter plate of the ventilation device for the motor home.

In the figure: the support shell 1, the base 11, the accommodating cavity 12, the connecting plate 13, the supporting plate 15, the guiding opening 16, the guiding wall 17, the guiding rib 18, the spigot 19,

Filter plate 2, annular frame 21, filter hole 22, guide slot 23, abdication slot 24, positioning slot 25, protective cover 3, cover 31, support rib 32 and top cover 33

Cover plate 4, rotary body 41, ventilation slot 42, mounting opening 43, limit boss 44, movable slot 45, trigger piece 46, guide slope 47, positioning groove 48, transition boss 49, torsion part 410, first indicator 411, second indicator 412, spacer 413, and rotary body,

Fan 5, fan screw 6, motor 7, elasticity buckle 8, elastic connection 9.

Detailed Description

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

Example 1:

referring to fig. 1 to 16, the present embodiment provides a ventilation device for a motor home, including: a support housing 1 for attachment to a motor home and a fan assembly, a filter plate 2 and a protective cover 3 and a cover plate 4 which are mounted in the support housing 1.

Next, in each structural detail, first is the support housing 1:

structurally, the support housing 1 includes a base 11 for fixing to a car as a house and a girder erected on top of the base 11; wherein the base 11 has a hollow receiving cavity 12 extending through its top and bottom. The entire base 11 has a ring-shaped structure, and the girder includes a pair of connection plates 13 connected to the base 11 and a support plate 15 simultaneously connected to the pair of connection plates 13 and located above the base 11.

And the second is a protective cover 3:

structurally, the protective cover 3 comprises a cover body 31 for forming circumferential shielding for the filter plate 2 and at least one pair of support ribs 32 protruding on the cover body 31 for movably coupling with the frame beams; and a top cover 33 for covering the top end of the support housing 1 is integrally connected to the cover 31. In this embodiment, a case where the cover 31 is provided with a pair of support ribs 32 is taken as an example. The top cover 33 is used to form a barrier to the upper side of the support case 1, and the cover 31 is used to form a barrier to the circumferential side of the support case 1, so that the entire waterproof effect of the ventilation device is achieved by the barrier in the axial and circumferential directions of the base 11.

Based on the above, the movable coupling structure of the shield 3 and the frame beam is as follows, as an example of one case with reference to the drawings:

the support plate 15 is provided with a guide opening 16 which is suitable for the supporting rib 32 to pass through and a guide wall 17 which is used for limiting the moving track of the supporting rib 32 and is arranged on the inner wall of the connecting plate 13. That is, the supporting rib 32 penetrates through the frame beam through the guide opening 16, and the guide wall 17 defines a moving track of the supporting rib 32 on the frame beam, so that the supporting rib 32 drives the protective cover 3 to move up and down along the axial direction of the base 11.

It is also necessary to say that, regarding the support rib 32 of the present embodiment, the support rib 32 is connected to the end of the top cover 33 facing the supporting housing 1, and the end of the support rib 32 away from the top cover 33 protrudes from the end of the cover 31 away from the top cover 33, so as to further ensure the waterproof and dustproof effects of the protective cover 3 on the whole ventilation device, in an alternative implementation case when the cover 31 forms a circumferential shielding for the filter plate 2, the edge of the end of the cover 31 facing away from the top cover 33 is attached to the corresponding outer edge of the base 11 facing toward the top cover 33, that is, there is no gap suitable for the entry of impurities between the inner wall of the cover 31 and the outer side wall of the base 11. In still another alternative implementation case, the end edge of the cover 31 facing away from the top cover 33 is attached to the top end surface of the base 11 facing toward the top cover 33, and a waterproof adhesive tape can be designed on the top end surface of the base 11 facing toward the top cover 33 at this time, so that the waterproof and dustproof effects of the whole ventilation device can be ensured by pressing the cover 31 against the waterproof adhesive tape.

In addition, it is also necessary to explain about the connection plate 13 of the present embodiment that, although the limitation of the movement track of the whole protection cover 3 is realized by the guide wall 17 and the guide opening 16 for the support rib 32, in order to improve the stability of the whole structure during the movement of the protection cover 3 relative to the support housing 1, when the inner wall of the cover 31 is a monolithic arc surface and when the cover 31 forms a circumferential shielding for the filter plate 2, the end edge of the cover 31 facing away from the top cover 33 is attached to the corresponding outer edge of the base 11 facing toward the top end of the top cover 33, the outer side wall of the connection plate 13 is coplanar with the outer side wall of the base 11, so that during the movement of the protection cover 3 relative to the support housing 1, the connection plate 13 is in sliding fit with the cover 31, that is, the connection plate 13 may form a supporting fit for the inner wall of the cover 31. When the cover 31 is formed to cover the filter plate 2 in the circumferential direction, if the edge of the end of the cover 31 facing away from the top cover 33 is attached to the top surface of the base 11 facing toward the top cover 33, the outer side wall of the connecting plate 13 is coplanar with the outer side wall of the base 11, and only a recess positioning groove for adapting to the connecting plate 13 needs to be formed in the recess in the inner wall of the cover 31. Of course, the outer side wall of the connecting plate 13 and the outer side wall of the base 11 may not be coplanar, and in this case, only an adaptive contact surface that is respectively attached to the outer side wall of the connecting plate 13 and the outer side wall of the base 11 needs to be designed on the inner wall of the cover 31. The above-mentioned various situations meet the requirements of the present embodiment, and the present embodiment is not limited in any way.

Further, the fan assembly:

specifically, the fan assembly includes a fan 5 provided on a support plate 15 of the bearing housing 1 and a driver for driving the fan 5 to operate. The drive may be, for example, but not limited to, a motor 7. The motor 7 drives the fan 5 in operation by means such as, but not limited to, a gear drive. The fan 5 can be fixed at one side end of the supporting plate 15 facing the base 11, and the driver is fixed at one side end of the supporting plate 15 facing away from the base 11, so that the fan 5 and the driver are not interfered with each other, and the installation space is effectively utilized.

The fan 5 is mounted on the support plate 15 by the fan screw 6, so that the fan 5 can be taken out only by detaching the fan screw 6.

Again next the filter plate 2:

the filter plate 2 comprises an annular framework 21 fixed on the inner wall of the connecting plate 13 of the frame beam of the support shell 1 and a plurality of filter holes 22 uniformly distributed on the annular framework 21; that is to say that the integral filter plate 2 is fitted vertically in its axial direction in the support housing 1. It should be noted that, because the connecting plates 13 are raised to a certain height relative to the base 11, the filter holes 22 on the annular skeleton 21 are completely exposed in the area above the base 11 when the annular skeleton 21 and the connecting plates 13 are assembled in place, that is, the hollow structure for exposing the plurality of filter holes 22 is formed between the two connecting plates 13 on the whole supporting shell 1 by the raised height of the connecting plates 13 relative to the base 11, when the filter plate 2 is fixed above the base 11 in the supporting shell 1 by the connecting plates 13, the base 11 does not cause shielding of the filter holes 22 on the filter plate 2, and smooth circulation of air flow is ensured. The hollowed-out structure in this embodiment includes a hollow structure formed between the two connection plates 13, that is, there is no connection portion between the two connection plates 13, and the filter plate 2 may be completely exposed in this region. Of course, a connection part may be provided between the two connection plates 13, as long as the connection part is provided with hollowed-out holes corresponding to the plurality of filter holes 22 on the filter plate 2, so that the air flow may flow to the outside of the supporting housing 1 of the ventilation device after passing through the filter holes 22 and the hollowed-out holes in sequence. That is, the hollow structure in this embodiment may be various, so long as the structure of the support housing 1, which does not cover the filter holes 22 of the filter plate 2, meets the use requirement of this embodiment, and the specific shape of the hollow structure is not limited in this embodiment.

Based on the above, as an example of a case in conjunction with the drawings, the assembly structure between the ring-shaped skeleton 21 and the support housing 1 is as follows:

generally, the annular skeleton 21 is in plug-in fit with the inner wall of the connection plate 13 of the girder. Specifically, a convex guide rib 18 is provided on the inner wall of the connecting plate 13, and a concave guide groove 23 adapted to be in plug-in fit with the guide rib 18 is provided on the outer side wall of the annular skeleton 21; in the assembly of the ring-shaped framework 21 with the bearing housing 1, the entire ring-shaped framework 21 is inserted into the connecting plate 13 of the girder after passing through the accommodating cavity 12 from the bottom of the base 11. After the annular skeleton 21 and the connection plate 13 are assembled in place, the fan 5 is positioned in the inner hole of the annular skeleton 21.

Furthermore, after the annular skeleton 21 and the connecting plate 13 are assembled in place, the shaft end of the annular skeleton 21 facing the protective cover 3 can be just abutted against the supporting plate 15, so that the supporting plate 15 forms a limit for one shaft end of the annular skeleton 21, while for the shaft end of the annular skeleton 21 facing away from the protective cover 3, the following stop structure is provided, in particular, an elastic buckle 8 suitable for supporting the annular skeleton 21 is further arranged on the inner wall of the connecting plate 13 or the base 11. The embodiment is not in any way limited here, in particular whether it is provided on the connection plate 13 or the base 11. The elastic buckle 8 is provided with a clamping head protruding from the inner wall of the connecting plate 13 or the base 11 under the action of non-stress, and in the process of assembling the annular framework 21 and the supporting shell 1, the annular framework 21 can generate jacking force for the elastic buckle 8 from the inner wall side of the connecting plate 13 or the base 11, so that the elastic buckle 8 is prevented from influencing the assembling process of the annular framework 21, the jacking force of the annular framework 21 for the elastic buckle 8 can be relieved after the annular framework 21 and the connecting plate 13 are assembled in place, and at the moment, the clamping head of the elastic buckle 8 can be reset to keep the state of supporting the annular framework 21 from the side of the annular framework 21, which is opposite to the protective cover 3.

The following will be described as cover plate 4:

the integral cover plate 4 comprises a rotary main body 41 in rotary fit with the base 11 and a trigger piece 46 arranged on the rotary main body 41 and used for pushing the protective cover 3; and a plurality of ventilation grooves 42 are formed on the rotating body 41; it should be noted that, the base 11 may be directly coupled to the bottom of the base 11, or may be coupled to a wall of the accommodating cavity 12, and the assembly position of the rotating body 11 is not limited in any way. In addition, the number of the triggering pieces 46 here, which is determined according to the number of the support ribs 32, is also exemplified in the case of a pair of support ribs 32 in the present embodiment. And the case where the pair of support ribs 32 is opposite to the rotary body 41 is the same, the following description will take only the case of any one of the support ribs 32 as an example.

On the basis of the above structure, it should be noted that, in the case where the rotating body 41 is assembled with the base 11 in place, the trigger 46 is just built in the accommodating cavity 12 so as to achieve the pushing action on the supporting rib 32 movably connected with the frame beam. Because the annular frame 21 is fixed to the inner wall of the connecting plate 13, in order to avoid interference of the axial movement track of the supporting rib 32 along the base 11 caused by the annular frame 21, in this embodiment, a relief groove 24 adapted to the supporting rib 32 to pass through is formed on the annular frame 21 along the axial direction thereof, that is, after passing through the guiding opening 16 of the supporting plate 15, the supporting rib 32 passes through the relief groove 24, and then one end of the supporting rib extends into the accommodating cavity 12 so as to be pushed by the triggering piece 46.

With the above-described structure, the triggering piece 46 is adapted to push the shield 3 with the rotation of the rotary body 41 to release the shield 3 from the circumferential shielding of the filter plate 2; and the trigger 46 is further adapted to release the pushing of the shield 3 with the rotation of the rotary body 41 to cause the shield 3 to form a circumferential shielding for the filter plate 2.

In addition, regarding the engagement of the rotating body 41 with the base 11, the present embodiment adopts, for example, the following structure:

at least two spigots 19 extending toward the center of the accommodation chamber 12 are provided on the chamber wall of the accommodation chamber 12; and at least two mounting openings 43 which are suitable for being matched with the at least two spigot 19 in a one-to-one fit are arranged on the circumferential edge of the rotary main body 41; the rotating body 41 is further formed on its circumferential edge along its rotation locus with a movable groove 45 adapted for insertion of at least two spigots 19. With this structure, when the rotating body 41 is assembled with the base 11, the mounting opening 43 is aligned with the spigot 19, and then the rotating body 41 is rotated again so that the spigot 19 enters the movable groove 45, at this time, the rotating body 41 is assembled with the base 11 in place, and the rotating body 11 cannot be detached from the base 11 without re-fitting the mounting opening 43 to the spigot 19 during the rotation of the rotating body 11. Therefore, the assembly between the rotary body 41 and the base 11 is realized by a simple rotation mode, and the operation is simple and efficient.

It should be noted here that, in order to avoid interference of the triggering element 26 in the receiving space 12 during rotation of the rotary body 41, the guide rib 18 for the insertion engagement with the annular frame 21 in this embodiment is provided protruding on the inner wall of the connecting plate 13 and does not extend to the space wall of the receiving space 12, whereas the integral filter plate 2 is inserted into the connecting plate 13 after passing through the receiving space 12, in order to achieve alignment of the annular frame 21 with the connecting plate 13 in the insertion engagement process, the present embodiment also uses the alignment of the spigot 19, in particular, a positioning groove 25 for the insertion engagement with the spigot 19 is provided on the outer side wall of the annular frame 21, in which case the mounting angle of the filter plate 2 relative to the connecting plate 13 is determined rapidly by the insertion engagement of the spigot 19 with the positioning groove 25.

The trigger piece 46 is pushed or not by the protective cover 3 through the following structure:

the end surface of the trigger piece 46 facing the protective cover 3 comprises a guide inclined surface 47 which is obliquely distributed relative to the rotary main body 41 and a positioning groove 48 which is formed at one end of the guide inclined surface 47 away from the rotary main body 41 and is used for pushing the protective cover 3; a transition boss 49 is formed between the positioning groove 48 and the guide slope 47. The positioning groove 48 is used for matching the supporting rib 32, namely, when the triggering piece 46 pushes the supporting rib 32, the end part of the supporting rib 32 is just embedded in the positioning groove 48. And when the trigger 46 rotates with the rotating body 41 relative to the base 11, the supporting rib 32 enters the positioning groove 48 and leaves the positioning groove 48 along the guiding inclined plane 47, and in the process, the supporting rib 32 needs to pass over the transition boss 49, so the design of the transition boss 49 can ensure that the supporting rib 32 cannot easily enter and leave the positioning groove 48, thereby preventing unexpected situations.

It should be noted that, in this embodiment, more than one positioning groove 48 may be provided on the guiding inclined plane 47, and the difference of the movable distance of the supporting rib 32 under the pushing action of the trigger piece 46 may be controlled by the difference of the positions of the positioning grooves 48 on the guiding inclined plane 47, so as to realize that the protection cover 3 stays at different opening positions relative to the filter plate 2 according to the needs of the user.

Based on the above structure, the present embodiment also makes the following structural design:

a limiting boss 44 is arranged on the rotating body 41 and positioned at one end of the guiding inclined surface 47 away from the positioning groove 48, and a spacing area 413 is formed between the limiting boss 44 and the guiding inclined surface 47. The spacer 413 is configured to receive the support rib 32 such that the support rib 32 temporarily engages the spacer 413 when the trigger 46 releases the pushing action on the support rib 32.

In addition, in order to facilitate the rotation of the rotating body 11, the end surface of the rotating body 41 facing away from the protection cover 3 in this embodiment is further provided with a raised torsion portion 410, where the rotating body 41 can be rotated only by pulling the torsion portion 410.

Finally, in this embodiment, at least one elastic connecting piece 9 is further disposed between the protection cover 3 and the support plate 15 of the frame beam, where the elastic connecting piece 9 may be a tension spring, one end of the tension spring is hooked on the top cover 33, and the other end of the tension spring is hooked with the support plate 15, under this structure, when the trigger piece 46 pushes the support rib 32, the whole protection cover 3 moves upward relative to the base 11, the tension spring is in a stretched state, and when the trigger piece 46 releases the pushing action on the support rib 32, the whole protection cover 3 can be reset under the reset action of the tension spring.

Here through the elastic connection piece 9 that sets up for protection casing 3 receives decurrent pulling force under the effect of elastic connection piece 9, guarantees the laminating effect of the outer wall of the cover body 31 of protection casing 3 and base 11 like this, avoids because of just relying on protection casing 3 self weight and causes the incomplete condition of closing.

When only one elastic connecting piece 9 is arranged, the elastic connecting piece 9 is preferably connected with the middle position of the supporting plate 15, so that the whole protection cover 3 is guaranteed to be stressed uniformly, and the phenomenon of shell blocking caused by unbalanced stress is avoided.

To sum up, for the ventilation device for an automobile in this embodiment:

when the triggering piece 46 pushes the protective cover 3 along with the rotation of the rotary main body 41 so that the protective cover 3 releases the circumferential shielding of the filter plate 2, the motor 7 drives the fan 5 to rotate to form air flow, and the air in the caravan is discharged to the periphery through the filter plate 2, so that the air in the caravan is fresh. When the trigger piece 46 rotates along with the rotary body 41 to release the pushing of the protective cover 3 so that the protective cover 3 forms circumferential shielding for the filter plate 2, the protective cover 3 can play a role in dust prevention and water prevention of the integral ventilation device. In addition, in this embodiment, the shield 3 is driven during the lifting movement relative to the support housing 1, and no external motor is required for driving, so that the motor does not need to be subjected to waterproof treatment, and the structure of the whole ventilation device can be simplified.

Example 2:

on the basis of the ventilation device for a motor home according to embodiment 1, in order to accurately grasp the position state of the trigger 46 from the side of the rotating body 11 facing away from the trigger 46 when the rotating body 11 is rotated, the ventilation device for a motor home according to the present embodiment is configured as follows:

the end surface of the rotary body 41 facing away from the protective cover 3 is also provided with two indication parts which are respectively corresponding to the two spigot 19 one to one along with the rotation of the rotary body 41; each indication part comprises a first indication bit 411 and a second indication bit 412 which are distributed at intervals; when the spigot 19 corresponds to the first indication position 411, the trigger piece 46 pushes the protective cover 3 to enable the protective cover 3 to release the circumferential shielding of the filter plate 2; when the spigot 19 corresponds to the second indication position 412, the trigger 46 releases the pushing of the shield 3 to cause the shield 3 to form a circumferential barrier to the filter plate 2. That is, the first indicator bit 411 and the second indicator bit 412 are designed to correspond to the positions of the two triggering pieces 46, so that the pushing state of the triggering pieces 46 relative to the supporting rib 32 can be determined by observing the positions of the first indicator bit 411 and the second indicator bit 412.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present utility model, and are more fully described herein with reference to the accompanying drawings, in which the principles of the present utility model are shown and described, and in which the general principles of the utility model are defined by the appended claims.

In the description of the present utility model, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present utility model, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.

Claims

1. A ventilation device for a motor home, comprising:

a support housing for fixing to a motor home;

2. The car as recited in claim 1, wherein the support housing includes a base for being fixed to the car as well as a girder erected on top of the base; wherein the method comprises the steps of

3. The device of claim 2, wherein the fan is fixed to an end of the frame beam facing the accommodating chamber, and the fan is located in an inner hole of the annular frame.

4. A ventilation device for a motor home according to claim 3, wherein at least one elastic connection member is further provided between the shield and the frame beam.

5. The ventilation device for a motor home according to any one of claims 2 to 4, wherein the protective cover comprises a cover body for forming a circumferential shielding for the filter plate and at least one pair of support ribs protruding on the cover body for movably coupling with the frame beam; and

6. The ventilation device for a motor home according to claim 5, wherein the annular skeleton is provided with a relief groove along an axial direction thereof, the relief groove being adapted to the support rib to pass through.

7. The ventilation device for the motor home according to claim 5, wherein the frame beam is provided with a guide opening for the supporting rib to pass through and a guide wall for limiting the moving track of the supporting rib.

8. The ventilation device for a motor home according to claim 2, wherein the annular skeleton is in plug-in fit with an inner wall of the frame girder.

9. The ventilation device for the motor home according to claim 8, wherein the inner wall of the frame beam is provided with a convex guide rib, and the outer side wall of the annular framework is correspondingly provided with a concave guide groove which is suitable for being in plug-in fit with the guide rib; and

10. The ventilation device for the motor home according to claim 2, wherein the chamber wall of the accommodating chamber is provided with at least two spigots extending toward the center of the accommodating chamber; and

11. The ventilation device for an automobile as claimed in claim 2 or 10, wherein the end surface of the trigger facing the shield comprises a guide inclined surface which is obliquely distributed with respect to the rotary body and a positioning groove which is formed at one end of the guide inclined surface away from the rotary body and is used for pushing the shield;

12. The ventilation device for the motor home according to claim 10, wherein the end surface of the rotating body facing away from the protective cover is further provided with a raised torsion portion; and