Patent Description:
With the increasingly fierce competition in the automotive industry, vehicle cost has become a critical factor for survival in intense competition. A vehicle-mounted air conditioner is one of vital components of a vehicle. The vehicle-mounted air conditioner blows cold air or warm air into the vehicle through an air conditioner vent mounted in a passenger compartment, to adjust an in-vehicle temperature. Whether the design of the air conditioner vent of the vehicle is reasonable or not affects a use effect of an in-vehicle air conditioner. To satisfy comfort requirements in the passenger compartment of the vehicle in different usage scenarios, most blowing-face air vents of the air conditioner of the current vehicle have airflow direction adjustment functions.

At present, the air conditioner vent designed in the automobile is mostly exposed, and is usually composed of a panel, a housing, an upper-layer blade, a lower-layer blade, a dial wheel, a ventilation door, a toggle, a drive connection rod, and the like. With a large number of parts and a complex drive structure, development costs are high, and the period is long. In recent years, some vehicles adopt a hidden air conditioner vent usually composed of an outer housing, an inner housing, an upper air guide blade, a lower air guide blade, a left air guide blade group, a right air guide blade group, a swing frame, a control mechanism, and the like. The control mechanism generally includes a support, a matching rod, a sliding groove, and other components within the inner housing. The structure is extremely complex and has strict requirements on the space structure, which greatly limits the degree of freedom in design.

<CIT> discloses an air outlet device of air conditioner of automobile, including casing, driving gear, drive gear, operating mechanism, anterior blade and rear portion blading mechanism. <CIT> discloses a register which can reduce draft resistance and a pressure loss in an un-deflected state even when all of the air to be blown out from a blowout port can be deflected. <CIT> discloses an air outlet for controlling airflow in a vehicle, including a housing having an air inlet and an air outlet, with first and second walls between the air inlet and the air outlet wherein the first wall is spaced from the second wall, an airfoil located within the housing, and a handle moveably mounted to the airfoil by a coupling. <CIT> discloses an adjustment mechanism for an air vent, comprising one or more adjustable first vanes having a main extension in a first direction, one or more adjustable second vanes having a main extension in a second direction being angled to the first direction, a shaft extending in the first direction and being rotatable around its length axis, a slider being movably attached to the shaft, and a rack.

The technical problem to be solved by the present invention is the problem of high parts count, complicated structure, and expensive costs of an existing air conditioner vent.

To solve the above technical problem, in a first aspect, an embodiment of the present invention discloses an air conditioner vent, including: a housing; a first blade group including at least one first air guide blade, the at least one first air guide blade has a first side edge and a second side edge that are opposite to each other, the first side edge and the second side edge are hinged to the housing, respectively; a second blade group including at least one second air guide blade, the at least one second air guide blade has a first end and a second end that are opposite to each other, the first end and the second end are hinged to the housing, respectively; and an air direction adjustment assembly including a toggle. The toggle includes a first connection portion connected to a corresponding one of the at least one first air guide blade and a second connection portion connected to the at least one second air guide blade through a gear mechanism. The housing includes a first housing and a second housing. The first housing and the second housing enclose together to define an accommodation cavity, and the first blade group and the second blade group are disposed in the accommodation cavity. The housing further includes a blade support, and the blade support including a first transverse frame, a second transverse frame, and a connection rod. The connection rod having two ends connected to the first transverse frame and the second transverse frame, respectively. The first end of the at least one second air guide blade is hinged to the first transverse frame, and the second end of the at least one second air guide blade is hinged to the second transverse frame. A shift fork is disposed at the first connection portion. The shift fork is engaged on the corresponding first air guide blade. The second connection portion is of an annular structure. The annular structure is sleeved on the at least one second air guide blade and the connection rod.

Further, the first blade group includes a plurality of first air guide blades connected together through a connection rod and integrally movable.

Further, the connection rod has an engagement groove; and the air direction adjustment assembly further includes a gear shaft rotatably disposed in the engagement groove.

Further, teeth are provided on a side edge of the at least one second air guide blade (<NUM>) close to the connection rod. The teeth are in meshing connection with the gear shaft.

Further, a rotary shaft is disposed at an inner side wall of the annular structure. The rotary shaft is hinged to a gear shaft of the air direction adjustment assembly.

Further, an avoidance structure is formed at a part of the at least one second air guide blade close to the first connection portion.

Further, the housing has an air vent, the first blade group and the second blade group are laminated to each other relative to the air vent, and the second blade group is disposed between the first blade group and the air vent.

Further, the at least one second air guide blade is perpendicular to the at least one first air guide blade.

Further, an avoidance structure is formed at an end portion of the at least one first air guide blade close to the at least one second air guide blade.

Further, a first mounting post is disposed at each of the first side edge and the second side edge of the at least one first air guide blade. The first mounting post is hinged to the housing; and/or a second mounting post is disposed at each of the first end and the second end of the at least one second air guide blade. The second mounting post is hinged to the housing.

In a second aspect, an embodiment of the present invention discloses an air conditioning system, including the air conditioner vent as described above.

In a third aspect, an embodiment of the present invention discloses a vehicle, including the air conditioning system as described above.

By adopting the above-mentioned technical solution, the air conditioner vent, the air conditioning system, and the vehicle according to an embodiment of the present invention have the following beneficial effects.

The overall structure of the air conditioner vent mainly includes parts such as the housing, the first blade group, the second blade group, and the air direction adjustment assembly, and is directly connected to the first air guide blade and the second air guide blade by using the toggle. The toggle drives the first blade group and the second blade group by means of rotational motion. Therefore, air direction adjustment is realized. This structure, with a small number of parts, simple design, and low spatial arrangement requirements, greatly simplifies the structure of the air conditioner vent, resulting in development cost savings and a decreasing development cycle.

In order to clearly explain technical solutions of the embodiments of the present invention or in the related art, accompanying drawings used in the description of the embodiments or the related art are briefly described below. Obviously, the accompanying drawings as described below are merely some embodiments of the present invention. Based on structures illustrated in these drawings, other accompanying drawings may be obtained by those of ordinary skill in the art without creative effort.

Here, supplementary explanations for the drawings are described below. <NUM>-housing; <NUM>-first housing; <NUM>-second housing; <NUM>-connection rod; <NUM>-gear shaft; <NUM>-engagement groove; <NUM>-first blade group; <NUM>-first air guide blade; <NUM>-connection rod; <NUM>-first mounting post; <NUM>-engagement rod; <NUM>-second blade group; <NUM>-second air guide blade; <NUM>-toggle; <NUM>-first connection portion; <NUM>-second connection portion; <NUM>-connection shaft.

Reference herein to "an embodiment" or "embodiment" means that a particular feature, structure, or characteristic may be included in at least some implementations of the present invention. In the description of the present invention, it should be noted that, the orientation or position relationship indicated by terms such as "upper", "lower", "top", "bottom", etc., is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the associated device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the term "first" or "second" is only for descriptive purposes, rather than indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features associated with "first" or "second" can explicitly or implicitly include one or more of these features. Moreover, expressions such as "first" and "second" are used to distinguish similar objects, rather than to describe a specific sequence or order. It should be understood that these data can be interchanged with each other under appropriate circumstances, such that the described embodiments of the present invention can be implemented in a sequence other than those illustrated in the figures or described in the present description.

The purpose of an air conditioner vent is to distribute cold air of an air conditioner to every corner of a vehicle. In particular, an air vent in back seat of the vehicle mainly solves the problem of uneven temperature preferences of the vehicle's air conditioner among passengers in front and rear rows, which is helpful for all passengers to enjoy functionality of the air conditioner. In addition, when necessary, an air vent of a front-row air conditioner or an air vent of a rear-row air conditioner may even be solely closed to satisfy requirements of passengers with different physiques.

To satisfy comfort requirements in a passenger compartment of the vehicle in different usage scenarios, most blowing-face air conditioner vents of the current automobile have airflow direction adjustment functions. An air ventilation direction adjustment function of the air conditioner vent of the existing automobile is generally achieved by changing a guide blade arranged at the air conditioner vent, i.e., a direction of a blowing-face air vent is adjusted by shifting an inclination direction of the guide blade. In the prior art, a plurality of arrangements of an adjustment mechanism of the air conditioner vent occurs. However, most of the adjustment mechanisms adopt a plurality of parts to form a transmission structure to control the guide blades, resulting in a complex structure, a large number of parts, and high costs.

As illustrated in <FIG>, an embodiment of the present invention provides an air conditioner vent, including a housing <NUM>, a first blade group <NUM>, a second blade group <NUM>, and an air direction adjustment assembly. The first blade group <NUM> includes at least one first air guide blade <NUM>. The at least one first air guide blade <NUM> has a first side edge and a second side edge that are opposite to each other. The first side edge and the second side edge are hinged to the housing <NUM>, respectively. The second blade group <NUM> includes at least one second air guide blade <NUM>. The at least one second air guide blade <NUM> has a first end and a second end that are opposite to each other. The first end and the second end are hinged to the housing <NUM>, respectively. The air direction adjustment assembly includes a toggle <NUM>. The toggle <NUM> includes a first connection portion <NUM> connected to a corresponding one of the at least one first air guide blade <NUM> and a second connection portion <NUM> connected to the at least one second air guide blade <NUM> through a gear mechanism.

The air conditioner vent described in the embodiments of the present invention has an overall structure mainly including parts such as the housing <NUM>, the first blade group <NUM>, the second blade group <NUM>, and the air direction adjustment assembly. The first air guide blade <NUM> is directly connected to the second air guide blade <NUM> through the toggle <NUM>, and the first blade group <NUM> and the second blade group <NUM> are driven by the rotation of the toggle <NUM>, thereby realizing air direction adjustment. This structure, with a small number of parts, simple design, and low arrangement space requirements, greatly simplifies the structure of the air conditioner vent, resulting in development cost savings and a decreasing development cycle.

In an embodiment of the present invention, as illustrated in <FIG>, the housing <NUM> is a support structure having an accommodation cavity and is configured to support the air guide blade and the air direction adjustment assembly. The housing <NUM> may be an integral structure or a structure formed by splicing a plurality of parts together. According to the present invention, as illustrated in <FIG>, the housing <NUM> includes a first housing <NUM> and a second housing <NUM>. The first housing <NUM> and the second housing <NUM> enclose together to define an accommodation cavity. The first blade group <NUM> and the second blade group <NUM> are disposed in the accommodation cavity. An end of the housing <NUM> may be an air vent. In order to satisfy user's sensory quality requirements for vehicle interior decoration and to make the appearance of the air conditioner vent aesthetically pleasing, the air vent of the housing <NUM> may be designed as a rectangular structure. Another end of the housing <NUM> may be fixedly connected to a vehicle body. Exemplarily, a connection between the housing <NUM> and the vehicle body may be achieved through any one of methods like clamping, bonding, screw connection, or rivet connection. The first blade group <NUM> and the second blade group <NUM> may be laminated to each other relative to the air vent. The second blade group <NUM> may be disposed close to the air vent, and may be disposed between the first blade group <NUM> and the air vent.

In an embodiment of the present invention, as illustrated in <FIG>, the first blade group <NUM> and the second blade group <NUM> are configured to guide cold air or warm air blown out of the air vent. Moreover, adjustment on an air direction and discharge quantity of air is achieved by adjusting an angle of the air guide blade of the first blade group <NUM> and an angle of the air guide blade of the second blade group <NUM>. The first blade group <NUM> and the second blade group <NUM> implement air direction adjustment in two directions, respectively. For example, as illustrated in <FIG>, when the air conditioner vent is disposed in the vehicle body, the first blade group <NUM> is parallel to a floor of the vehicle body to achieve vertical air direction adjustment, and the second blade group <NUM> is perpendicular to the floor of the vehicle body to achieve transverse air direction adjustment. It should be understood that the above examples are merely illustrative of an air direction adjustment function of the first blade group <NUM> and an air direction adjustment function of the second blade group <NUM>, rather than defining that the first blade group <NUM> may only be disposed parallel to the floor of the vehicle body, the second blade group <NUM> may only be disposed perpendicular to the floor of the vehicle body, and the first blade group <NUM> and the second blade group <NUM> are disposed in other manners based on different arrangement positions in the vehicle body. The first blade group <NUM> and the second blade group <NUM> are not necessarily disposed in a manner of being perpendicular to each other, or may be disposed in a cross manner at other angles. The first blade group <NUM> and the second blade group <NUM> implement swing control by means of the air direction adjustment assembly. According to the present invention, the air direction adjustment assembly includes a toggle <NUM> provided with a first connection portion <NUM> and a second connection portion <NUM> disposed thereon. A shift fork is disposed at the first connection portion <NUM>. The shift fork is engaged on the corresponding first air guide blade <NUM>. The second connection portion <NUM> is of an annular structure sleeved on the second air guide blade <NUM> and the connection rod <NUM>.

In an embodiment of the present invention, the first blade group <NUM> may include one or more first air guide blades <NUM>, which may be flexibly configured based on an arrangement space of the air conditioner vent exemplarily. Similarly, the second blade group <NUM> may include one or more second air guide blades <NUM>. Taking the plurality of first air guide blades <NUM> and one second air guide blade <NUM> as an example, the arrangement of the first air guide blade <NUM> and the second air guide blade <NUM> will be described below. This example can be referred to for the arrangement of one first air guide blade <NUM> and the plurality of second air guide blades <NUM>, and the arrangement of the plurality of first air guide blades <NUM> and the plurality of second air guide blades <NUM>.

As an exemplary implementation, as illustrated in <FIG>, the first blade group <NUM> includes the plurality of first air guide blades <NUM>. For each of the plurality of first air guide blades <NUM>, a first mounting post <NUM> is disposed at each of the first side edge and the second side edge of each of the plurality of first air guide blades <NUM>. The two first mounting posts <NUM> are rotatably connected to the first housing <NUM> and the second housing <NUM>, respectively. The plurality of first air guide blades <NUM> is sequentially arranged at intervals from top to bottom and is parallel to each other. In order to enable the plurality of first air guide blades <NUM> to integrally move under the driving of one toggle <NUM>, a hinge post may be disposed at any one of side edges or two side edges of the plurality of first air guide blades <NUM>. Moreover, these first air guide blades <NUM> are connected by providing a rigid connection rod <NUM> with a hinge hole. When the toggle <NUM> drives one of the first air guide blades <NUM> to swing up and down, all the first air guide blades <NUM> swing up and down together under the action of the rigid connection rod <NUM>.

As an exemplary implementation, as illustrated in <FIG>, the second blade group <NUM> includes one second air guide blade <NUM>. A second mounting post is provided on each of a first end and a second end of the second air guide blade <NUM>. The two second mounting posts are rotatably connected to the housing <NUM>, respectively. Exemplarily, as illustrated in <FIG>, since the first blade group <NUM> and the second blade group <NUM> are laminated to each other relative to the air vent, in order to make the whole air conditioner vent compact in structure and reduce an occupied space, avoidance structures is formed at an end portions of the plurality of first air guide blades <NUM> close to the at least one second air guide blade <NUM>, to provide the second air guide blade <NUM> with a free swing space. In this implementation, the second air guide blade <NUM> is perpendicular to the first air guide blade <NUM>, i.e., the first air guide blade <NUM> has two ends respectively connected to the first housing <NUM> disposed leftwards and the second housing <NUM> disposed rightwards, and the second air guide blade <NUM> has two ends respectively connected to upper and lower ends of the first housing <NUM> or the second housing <NUM>. In some embodiments, an independent blade support may also be provided to connect and fix the second air guide blade <NUM>. According to the present invention, the housing <NUM> further includes a blade support. The blade support includes a first transverse frame, a second transverse frame, and a connection rod <NUM>. The connection rod <NUM> has two ends connected to the first transverse frame and the second transverse frame, respectively. The blade support may be disposed between the first housing <NUM> and the second housing <NUM>. Alternatively, the first transverse frame and the second transverse frame may be engaged on an upper side surface and a lower side surface of the housing <NUM>, respectively. The connection rod <NUM> may be disposed at the air vent of the housing <NUM>. Exemplarily, the connection rod <NUM> is parallel to each of a left side edge and a right side edge of the air vent of the housing <NUM>. The first end of the second air guide blade <NUM> is hinged to the first transverse frame, and the second end of the second air guide blade <NUM> is hinged to the second transverse frame.

In an embodiment of the present invention, as illustrated in <FIG> and <FIG>, the connection rod <NUM> has an engagement groove <NUM>. The air direction adjustment assembly further includes a gear shaft <NUM> rotatably disposed in the engagement groove <NUM>. Exemplarily, as illustrated in <FIG>, an upper side surface and a lower side surface of the engagement groove <NUM> have shaft holes, and the gear shaft <NUM> has an upper end and a lower end which are disposed in the shaft holes. Exemplarily, the connection rod <NUM> has a hollow structure, the hollow structure of the connection rod <NUM> is exposed at an upper side surface and a lower side surface of the engagement groove <NUM>, and an upper end and a lower end of the gear shaft <NUM> may be directly engaged in the hollow structure. In some embodiments, the connection rod <NUM> may not be provided with the gear shaft <NUM> instead of being provided with teeth, enabling the connection rod <NUM> to be in direct meshing connection with the second air guide blade <NUM> by means of the teeth. Meanwhile, the connection rod <NUM> has two ends directly hinged to the first transverse frame and the second transverse frame. Therefore, the connection rod <NUM> is rotatable.

In an embodiment of the present invention, as illustrated in <FIG>, the teeth are provided on a side surface of the gear shaft <NUM> and provided on a side edge of the at least one second air guide blade <NUM> close to the connection rod <NUM>. Teeth on the second air guide blade <NUM> are in meshing connection with teeth on the gear shaft <NUM>. Exemplarily, the side surface of the gear shaft <NUM> may be completely covered with the teeth on the gear shaft <NUM>. Exemplarily, the teeth on the gear shaft <NUM> may also be disposed at a part of a side surface of the gear shaft <NUM> in contact with the second air guide blade <NUM>, for example, on a half side surface. The teeth on the gear shaft <NUM> determine a swingable range of the second air guide blade <NUM> and are preferably disposed at the half side surface of the gear shaft <NUM> in contact with the second air guide blade <NUM>. The teeth are provided on the side edge of the at least one second air guide blade <NUM> close to the gear shaft <NUM>. Exemplarily, the side edge of the second air guide blade <NUM> close to the gear shaft <NUM> may be directly configured to be meshed with the gear shaft <NUM>. Exemplarily, a gear structure is provided on the side edge of the second air guide blade <NUM> close to the gear shaft <NUM>, and may be integrally formed with the second air guide blade <NUM> or fixed on the second air guide blade <NUM> by means of bonding, welding, engaging, or the like.

In an embodiment of the present invention, a group of the first air guide blade <NUM> and a group of the second air guide blade <NUM> implement swing control through one toggle <NUM>. As illustrated in <FIG>, in order to simplify a swing control structure and ensure reliability of the structure at the same time, the toggle <NUM> adopts an annular sheet-like structure. In some embodiments, a shape of an annular toggle <NUM> is similar to a pull ring of a pop can. As illustrated in <FIG>, an outer side of an end of the annular toggle <NUM> is a first connection portion <NUM>, and the first connection portion <NUM> is provided with a shift fork. Since the plurality of first air guide blades <NUM> is connected together by means of the rigid connection rod <NUM>, the shift fork is connected to any one of the first air guide blades <NUM> to drive the entire group of first air guide blades <NUM> to move. The shift fork is engaged with the first air guide blade <NUM> through an engagement structure. As an example, the first air guide blade <NUM> connected to the shift fork is provided with an engagement rod <NUM>. Moreover, the shift fork is of a clip-shaped structure, is engaged on the engagement rod <NUM>, and may slide on the engagement rod <NUM> leftwards or rightwards. As illustrated in <FIG>, an annular portion of the annular toggle <NUM> is a second connection portion <NUM>, and is sleeved on the connection rod <NUM> of the blade support and the second air guide blade <NUM>. As illustrated in <FIG>, a connection shaft <NUM> is provided on an inner side wall of the annular portion and is hinged to a side surface of the gear shaft <NUM>. In some embodiments, which do not belong to the present invention, the air conditioner vent may also not be provided with the blade support and the gear shaft <NUM>, and the connection shaft <NUM> is directly hinged to the second air guide blade <NUM>. As illustrated in <FIG>, in order to enable the toggle <NUM> to freely rotate up and down around the connection shaft <NUM> and to make the entire air vent compact in structure, an avoidance structure is provided on a portion pass through the second air guide blade <NUM> of the annular portion and close to the first connection portion <NUM>, and the avoidance structure provides freedom for a vertical swing of the toggle <NUM>. The toggle <NUM> has an attractive appearance in the form of an annular structure, is easy to assemble, and has strong connection reliability.

In an embodiment of the present invention, as illustrated in <FIG>, when the user uses the toggle <NUM> to perform air direction adjustment, the annular toggle <NUM> is shifted up and down and rotates up and down along a connection shaft <NUM> of the toggle <NUM> mounted in the gear shaft <NUM>, and a shift fork on the first connection portion <NUM> drives the first blade group <NUM> by shifting the engagement rod <NUM> of the first air guide blade <NUM>. The first air guide blade <NUM> in the first blade group <NUM> rotates up and down along a first mounting post <NUM> of each two ends of the first air guide blade <NUM> mounted on the housing <NUM>. As illustrated in <FIG>, the toggle <NUM> is shifted downwards, the first blade group <NUM> rotates, and the air blows downwards along the first air guide blade <NUM>. As illustrated in <FIG>, the annular toggle <NUM> is shifted leftwards or rightwards and drives the gear shaft <NUM> to rotate left and right through a connection shaft <NUM>, and the teeth on the gear shaft <NUM> drives the second air guide blade <NUM> to rotate left and right. Moreover, a gear on the gear shaft <NUM> drives the second air guide blade <NUM> to rotate left and right. As illustrated in <FIG>, the toggle <NUM> is shifted leftwards, the second blade rotates rightwards, and the air blows to the left along an upper layer blade and the housing <NUM>. With the air conditioner vent described in the embodiments of the present invention, as illustrated in <FIG>, the housing <NUM> includes a first housing <NUM> and a second housing <NUM>. The first housing <NUM> is enclosed together to form a structure with an open end. The first blade group <NUM>, the second blade group <NUM>, and the air direction adjustment assembly are wrapped in the housing <NUM>. The first blade group <NUM> includes a plurality of air guide blades. The plurality of first air guide blades <NUM> has two ends that are respectively hinged to the first housing <NUM> and the second housing <NUM>, is connected together through the connection rod <NUM>, and may integrally swing up and down. The second blade group <NUM> includes one second air guide blade <NUM> having an upper end and a lower end that are hinged to the blade support. The gear shaft <NUM> is provided on the blade support. An incomplete gear is provided on the gear shaft <NUM>. The gear is provided at the side edge of the second air guide blade <NUM> and engaged with the gear shaft <NUM>. The annular toggle <NUM> is sleeved on the blade support. The connection shaft <NUM> is provided on an inner ring surface of the annular toggle <NUM> and is hinged to the gear shaft <NUM>. The shift fork is provided at an end of the annular toggle <NUM> and is connected to one of the first air guide blades <NUM>. The engagement rod <NUM> is provided on the first air guide blade <NUM>, and the shift fork is engaged on the engagement rod <NUM>. The second air guide blade <NUM> is provided with an avoidance notch, and an end of the annular toggle <NUM> and the shift fork are in the avoidance notch. The overall structure has a small quantity of parts, is simple in design, and has low demands for an arrangement space, which greatly simplifies the structure of the air conditioner vent, saves development costs and reduces a development cycle.

The embodiments of the present invention further provide an air conditioning system. The air conditioning system includes the air conditioner vent as described above.

In an embodiment of the present invention, the air conditioning system has the air conditioner vent. For a specific structure of the air conditioner vent, reference is made to all the modes in which the air conditioner vent is described above.

Claim 1:
An air conditioner vent, comprising:
a housing (<NUM>);
a first blade group (<NUM>) comprising at least one first air guide blade (<NUM>), the at least one first air guide blade (<NUM>) having a first side edge and a second side edge that are opposite to each other, the first side edge and the second side edge being hinged to the housing (<NUM>), respectively;
a second blade group (<NUM>) comprising at least one second air guide blade (<NUM>), the at least one second air guide blade (<NUM>) having a first end and a second end that are opposite to each other, the first end and the second end being hinged to the housing (<NUM>), respectively; and
an air direction adjustment assembly comprising a toggle (<NUM>), the toggle (<NUM>) including a first connection portion (<NUM>) connected to a corresponding one of the at least one first air guide blade (<NUM>) and a second connection portion (<NUM>) connected to the at least one second air guide blade (<NUM>) through a gear mechanism,
wherein the housing (<NUM>) comprises a first housing (<NUM>) and a second housing (<NUM>), the first housing (<NUM>) and the second housing (<NUM>) enclosing together to define an accommodation cavity, and the first blade group (<NUM>) and the second blade group (<NUM>) being disposed in the accommodation cavity,
wherein the housing (<NUM>) further comprises a blade support, the blade support comprising a first transverse frame, a second transverse frame, and a connection rod (<NUM>), the connection rod (<NUM>) having two ends connected to the first transverse frame and the second transverse frame, respectively; and the first end of the at least one second air guide blade (<NUM>) is hinged to the first transverse frame, and the second end of the at least one second air guide blade (<NUM>) is hinged to the second transverse frame,
characterized in that
a shift fork is disposed at the first connection portion (<NUM>), the shift fork being engaged on the corresponding first air guide blade (<NUM>),
and
the second connection portion (<NUM>) is of an annular structure, the annular structure being sleeved on the at least one second air guide blade (<NUM>) and the connection rod (<NUM>).