CN108888171A - Reverse blowing type self-cleaning dust collector - Google Patents

Abstract

The present invention discloses a reverse-blowing self-cleaning vacuum cleaner, comprising: a dust collecting bucket, which is open at its upper part; a cover plate, which is connected to the upper part of the dust collecting bucket and comprises an opening for exhausting air; a filter assembly, which is arranged at the opening; and an exhaust port switching assembly, which covers the upper part of the filter assembly, and the exhaust port switching assembly comprises: a mounting plate covering the top of the filter assembly; and a left exhaust port switching mechanism and a right exhaust port switching mechanism arranged on the mounting plate. According to the present invention, it performs alternate blowing and exhausting on the filter hepa, so that the vacuum cleaner can blow off the dust accumulated on the surface thereof while exhausting air, thereby solving the problem that the filter hepa is blocked by dust too quickly, and enables the filter hepa to maintain or restore a sufficiently large air permeability for a long time, thereby better ensuring that the vacuum cleaner can maintain a stronger suction force.

Description

A reverse blowing type self-cleaning vacuum cleaner

technical field

The invention relates to the field of vacuum cleaners, in particular to a reverse blowing type self-cleaning vacuum cleaner.

Background technique

The working principle of the vacuum cleaner is to use the motor to drive the blades to rotate at high speed, generate air negative pressure in the sealed shell, and absorb the surface of the carpet, floor, wall and other objects with dust, and the dust is sucked into the dust along with the air. After the separation component, the dust is filtered by the Hypa in the dust-air separation component and collected by the dust bucket, and the filtered clean air is discharged out of the vacuum cleaner body.

During the decontamination process of the vacuum cleaner, whether it is a dust filter or a cyclone filter, there will be dust attached to the surface of the air inlet side of the filter Hypa. The longer it is used, the more dust will accumulate on the surface of the filter Hypa, which will gradually weaken the filter. The air permeability of Hypa causes the wind force to drop, thereby reducing the dust removal performance of the vacuum cleaner.

In view of this, it is necessary to develop a reverse blowing type self-cleaning vacuum cleaner to solve the above problems.

Contents of the invention

Aiming at the deficiencies in the prior art, the object of the present invention is to provide a reverse blowing type self-cleaning vacuum cleaner, which alternately blows and draws air through the filter Hypa, so that the vacuum cleaner can suck air while sucking air. It can blow off the dust accumulated on its surface, thus solving the problem that the filter Hypa is too fast to be blocked by dust, so that the filter Hypa can maintain or restore a sufficient air permeability for a long time, and thus better ensure that the vacuum cleaner can remain stronger of suction.

In order to achieve the above object and other advantages according to the present invention, a reverse blowing type self-cleaning vacuum cleaner is provided, comprising:

a dust collecting bucket which is open at its upper part;

a cover plate, which is connected to the upper part of the dust container and includes an opening for extracting air;

a filter assembly disposed at the opening; and

The air outlet switch assembly, the air outlet switch assembly covers the upper part of the filter assembly, and the air outlet switch assembly includes:

a mounting plate covering the top of the filter assembly; and

The left air outlet switching mechanism and the right air outlet switching mechanism arranged on the mounting plate,

Among them, the mounting plate is provided with a left air outlet, a right air outlet, a left air outlet, and a right air outlet, and the left air outlet and the right air outlet as well as the left air outlet and the right air outlet are arranged symmetrically in the direction of the X axis. The left air outlet switching mechanism alternately blocks the left air outlet and the left air outlet, while the right air outlet switching mechanism alternately blocks the right air outlet and the right air outlet, so that:

When the left air outlet is opened and the left air outlet is closed, the right air outlet is closed and the right air outlet is opened; or

When the left air outlet is closed and the left air outlet is opened, the right air outlet is opened and the right air outlet is closed.

Preferably, the filter assembly includes a filter hypa and a hypa connecting portion, the hypa connecting portion integrally combines the filter hypa on the outer periphery of the filter hypa and extends upward along the outer periphery of the filter hypa, and finally connects with the mounting plate The bottom surface of the filter is connected, so that the airflow in and out of the chamber is formed between the installation plate and the filter Hypa.

Preferably, a partition plate extending along the Y-axis is provided between the installation plate and the filter hypa, thereby dividing the air flow in and out of the warehouse into a left inlet and outlet and a right inlet and outlet, wherein the left air outlet and the left air outlet are connected to the The left inlet and outlet bins are connected, and the right air outlet and the right air outlet are both connected with the right inlet and outlet bins.

Preferably, an air duct assembly is provided on the cover, and the air duct assembly includes:

a motor front cover which is open at its rear side; and

a motor rear cover, the motor rear cover is connected to the rear side of the motor front cover and the two are combined to form a motor accommodation compartment therebetween,

Wherein, the motor accommodating compartment includes a left motor compartment and a right motor compartment arranged side by side and communicated with each other. The left motor compartment and the right motor compartment are respectively provided with a left motor and a right motor. Left motor and right motor correspond to left cooling air outlet and right cooling air outlet.

Preferably, the motor front cover includes:

an air intake chamber located at the front side of the motor accommodation chamber; and

At least one filter air duct arranged at the bottom of the motor accommodation compartment,

Wherein, both the air inlet bin and the filtered air outlet pipe are in communication with the motor accommodating bin.

Preferably, the bottom of the air inlet chamber is provided with a left air inlet and a right air inlet connecting it with the outside world, the left air inlet and the right air inlet are arranged in a straight line along the X-axis direction, and the left air inlet and the right air inlet are connected to the left air inlet respectively. The air outlet and the right air outlet are connected.

Preferably, the left air outlet switching mechanism includes:

the left drive on the mounting plate; and

Slide the left switching plate covering the left air outlet and the left air outlet,

Wherein, the left switching board is arranged between the left air inlet and the mounting plate, and the left switching board is provided with a left ventilation port, and the left switching board is connected to the left drive so that the left switching board reciprocates in the Y-axis direction driven by the left drive. Sliding, so that the left ventilation port is alternately connected with the left suction port and the left blowing port.

Preferably, the switching mechanism for the right air outlet includes:

the right drive on the mounting plate; and

Slide the right switching plate covering the right air outlet and the right air outlet,

Wherein, the right switching board is arranged between the right air inlet and the mounting board, and the right switching board is provided with a right air vent, and the right switching board is connected to the right drive so that the right switching board reciprocates in the direction of the Y axis under the drive of the right drive. Sliding, so that the right air vent is alternately connected with the right air suction port and the right air blow port.

Preferably, there are two filtering air outlet pipes, namely a left air outlet pipe and a right air outlet pipe, and the left air outlet pipe and the right air outlet pipe are symmetrically arranged with respect to the motor housing.

Preferably, both the left air outlet pipe and the right air outlet pipe extend along the Y-axis direction, and the ends of the left air outlet pipe and the right air outlet pipe are all connected to the motor accommodation chamber, and the left air outlet pipe and the right air outlet pipe A left air outlet and a right air outlet are respectively provided at the front end of the air outlet.

Compared with the prior art, the present invention has the beneficial effect that: by alternately blowing and drawing air on the filter Hypa, the dust collector can blow off the dust accumulated on its surface while drawing air, thereby solving the problem of The problem that the filter hypa is blocked by dust too quickly allows the filter hypa to maintain or restore a sufficient air permeability for a long time, thereby better ensuring that the vacuum cleaner can maintain a stronger suction.

Description of drawings

Fig. 1 is a three-dimensional structural view of a reverse blowing type self-cleaning vacuum cleaner according to the present invention;

Fig. 2 is a top view of the reverse blowing type self-cleaning vacuum cleaner according to the present invention;

Fig. 3 is a partial three-dimensional structural view of the reverse blowing type self-cleaning vacuum cleaner according to the present invention;

Fig. 4 is a partial exploded view of the reverse blowing type self-cleaning vacuum cleaner according to the present invention;

Fig. 5 is a three-dimensional structural view of the mounting plate in the reverse blowing type self-cleaning vacuum cleaner according to the present invention;

Fig. 6 is a three-dimensional sectional view along the A-A direction in Fig. 2;

Fig. 7 is a plane sectional view along the A-A direction in Fig. 2;

Fig. 8 is a three-dimensional structural view of the air duct assembly in the reverse blowing type self-cleaning vacuum cleaner according to the present invention;

Fig. 9 is a top view of the air duct assembly in the reverse blowing type self-cleaning vacuum cleaner according to the present invention;

Fig. 10 is a three-dimensional sectional view along the B-B direction in Fig. 9 .

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, and the aforementioned and other objects, features, aspects and advantages of the present invention will become more apparent, so that those skilled in the art can implement them with reference to the description. In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like parts. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are generally not intended to require a specific orientation. Terms referring to attachment, coupling, etc. (e.g., "connected" and "attached") refer to a fixed or attached relationship, as well as a movable or rigid attachment or relationship, of structures to one another, directly or indirectly through intermediate structures, unless otherwise stated in The other way is clearly stated.

Referring to Figures 1 to 4, the reverse blowing self-cleaning vacuum cleaner 1 includes:

Dust collecting bucket 11, the dust collecting bucket 11 is open at its upper part;

Cover plate 13, the cover plate 13 is connected to the upper part of the dust bucket 11, and includes an opening 131 for air extraction;

filter assembly 14, the filter assembly 14 is located at the opening 131; and

The air outlet switch assembly 15, the air outlet switch assembly 15 covers the upper part of the filter assembly 14, and the air outlet switch assembly 15 includes:

the mounting plate 151 covering the top of the filter assembly 14; and

The left air outlet switching mechanism and the right air outlet switching mechanism arranged on the mounting plate 151,

Among them, the mounting plate 151 is provided with a left air outlet 1512, a right air outlet 1513, a left air outlet 1514, and a right air outlet 1515. The X-axis direction is symmetrically arranged left and right, the left air outlet switching mechanism alternately blocks the left air outlet 1512 and the left air outlet 1514, and the right air outlet switching mechanism simultaneously blocks the right air outlet 1513 and the right air outlet 1515 Alternate blockage is performed so that:

When the left air outlet 1512 is opened and the left air outlet 1514 is closed, the right air outlet 1513 is closed and the right air outlet 1515 is opened; or

When the left air outlet 1512 is closed and the left air outlet 1514 is opened, the right air outlet 1513 is opened and the right air outlet 1515 is closed.

Referring to FIG. 1 , in a preferred embodiment, a dust suction pipe 111 is connected to the side wall of the dust collection barrel 11 in a connected manner, and the dust suction pipe 111 can be connected to a dust suction head of a vacuum cleaner.

4, in a preferred embodiment, a skirt 132 is integrally formed on the edge of the opening 131, and the skirt 132 extends vertically upwards along the edge of the opening 131 and surrounds the top of the opening 131 to form an open top. The filter assembly 14 is arranged in the suction cavity, and the top of the suction cavity is sealed.

Referring again to FIG. 4 , the filter assembly 14 includes a filter hypa 141 and a hypa connection part 142 , the hypa connection part 142 integrally combines the filter hypa 141 on the periphery of the filter hypa 141 and along the outer periphery of the filter hypa 141 It extends upwards and is finally connected to the bottom surface of the installation plate 151 , so that an airflow in and out of the chamber is formed between the installation plate 151 and the filtering hypa 141 .

Furthermore, a partition 143 extending along the Y-axis is provided between the installation plate 151 and the filtering Hypa 141, thereby dividing the airflow into and out of the bin into a left bin and a right bin, wherein the left air outlet 1512 and the The left inlet and outlet bins are connected, and the right air outlet 1513 and the right air outlet 1515 are both connected with the right inlet and outlet bins. Referring to Fig. 7, the filtering hypa 141 is divided into two pieces by the partition 143, which are respectively the left filtering hypa 1411 and the right filtering hypa 1412, and the left filtering hypa 1411 and the right filtering hypa 1412 are respectively arranged in the left in-out warehouse and the right Directly below the entry and exit warehouse.

Referring to Figures 8 to 10, an air duct assembly 16 is provided on the cover plate 13, and the air duct assembly 16 includes:

a motor front cover 161 which is opened at its rear side; and

the motor rear cover, the motor rear cover is connected to the rear side of the motor front cover 161 and the two are combined to form a motor accommodating chamber between the two,

Wherein, the motor accommodation compartment includes a left motor compartment and a right motor compartment arranged side by side and communicated with each other, the left motor compartment and the right motor compartment are respectively provided with a left motor 167 and a right motor 168, and the rear cover of the motor is provided with a The left cooling air outlet 163 and the right cooling air outlet 164 corresponding to the left motor 167 and the right motor 168 respectively.

Further, the motor front cover 161 includes:

The air intake chamber 162 located at the front side of the motor accommodation chamber; and

At least one filter air duct arranged at the bottom of the motor accommodation compartment,

Wherein, both the air inlet bin 162 and the filtered air duct are in communication with the motor accommodating bin. The air inlet of the left motor 167 and the air inlet of the right motor 168 are all located in the air intake chamber 162, and the air outlet of the left motor 167 and the air outlet of the right motor 168 are all located in the motor accommodation chamber, and the left motor 167 And the outside of the right motor 168 forms a seal with the inner sidewall of the air intake chamber 162.

Further, the bottom of the air inlet chamber 162 is provided with a left air inlet 1621 and a right air inlet 1622 to communicate with the outside world, the left air inlet 1621 and the right air inlet 1622 are arranged in a straight line along the X-axis direction, the left air inlet 1621 and the right The air inlet 1622 communicates with the left air outlet 1512 and the right air outlet 1513 respectively, while the left air outlet 1514 and the right air outlet 1515 directly communicate with the outside atmosphere.

Referring to Figures 4 to 6, the switching mechanism for the left air outlet includes:

the left driver 153 located on the mounting plate 151; and

Slidingly cover the left switching plate 154 on the left air outlet 1512 and the left air outlet 1514,

Wherein, the left switching plate 154 is located between the left air inlet 1621 and the mounting plate 151, and the left switching plate 154 is provided with a left air vent 1541, and the left switching plate 154 is connected to the left driver 153 so that the left switching plate 154 is connected to the left driver 153. It slides back and forth in the direction of the Y-axis under the driving force, so that the left air outlet 1541 communicates with the left air outlet 1512 and the left air outlet 1514 alternately.

Further, the right air outlet switching mechanism includes:

the right driver 152 located on the mounting plate 151; and

Slidingly cover the right switching plate 155 on the right air outlet 1513 and the right air outlet 1515,

Wherein, the right switching plate 155 is located between the right air inlet 1622 and the mounting plate 151, and the right switching plate 155 is provided with a right air vent 1551, and the right switching plate 155 is connected with the right driver 152 so that the right switching plate 155 is connected to the right driver 152. Driven by the drive, it slides back and forth in the Y-axis direction, so that the right air outlet 1551 communicates with the right air outlet 1513 and the right air outlet 1515 alternately.

In a preferred embodiment, both the left driver 153 and the right driver 154 are electromagnetic induction drivers.

Referring to Fig. 1, there are two air outlet pipes for the filter, namely the left air outlet pipe 165 and the right air outlet pipe 166 respectively, and the left air outlet pipe 165 and the right air outlet pipe 166 are symmetrically arranged about the motor housing .

Further, the left air outlet pipe 165 and the right air outlet pipe 166 all extend along the Y-axis direction, and the ends of the left air outlet pipe 165 and the right air outlet pipe 166 are all connected with the motor accommodation chamber, and the left air outlet pipe 165 and the The front end of the right air outlet pipe 166 defines a left air outlet 1651 and a right air outlet 1661 respectively.

Furthermore, the air outlet direction of the left air outlet 1651 is toward the left side of the body, and the air outlet direction of the right air outlet 1661 is toward the right side of the body. Adopting this kind of relative air outlet direction layout can prevent the filtered air discharged from the left air outlet 1651 and the right air outlet 1661 from meeting and generating more noise. On the other hand, the left air outlet 1651 and the right air outlet can also be arranged The filtered air discharged from 1661 avoids the air intake directions of the left air inlet 1621 and the right air inlet 1622, preventing the filtered air from being sucked into the air chamber 162 again.

Referring to FIG. 1 again, the left air outlet pipe 165 and the right air outlet pipe 166 are located on the same horizontal plane. The left air outlet pipe 165 and the right air outlet pipe 166 play a role of stable support for the motor front cover 161 and other connecting parts at the same time, so that the air duct assembly 16 of the vacuum cleaner vibrates less during the working process, further reducing the working noise .

Further, the air outlet direction of the left heat dissipation air outlet 163 is toward the left side of the body, and the air outlet direction of the right heat radiation outlet 164 is toward the right side of the body.

Here, when the left air outlet 1512 is closed and the left air outlet 1514 is opened, the right air outlet 1513 is opened and the right air outlet 1515 is closed as an example to explain the working principle of the reverse blowing self-cleaning vacuum cleaner 1 .

working principle:

Referring to Fig. 1, Fig. 6 and Fig. 7, at this time, the left air outlet 1512 is closed, the left air outlet 1514 is opened, the right air outlet 1513 is opened, the right air outlet 1515 is closed, the right air inlet 1622 is connected with the right air outlet 1513, and the left The air inlet 1612 is cut off from the left air outlet 1512, and the left air outlet 1514 communicates with the outside atmosphere. When the left motor 167 and the right motor 168 rotate to draw air, the air inlet bin 162 forms a negative pressure, and the air in the dust collection bucket 11 passes through After being filtered by the right filter Hypa 1412, it enters the air intake chamber 162 through the right air inlet 1513, and is finally discharged to the outside atmosphere. Since the dust collection bucket 11 is sucked out of its internal air, it will also form a negative pressure inside. , which causes the outside air to enter the left inlet and outlet chamber through the left blowing port 1514, and then blows the upper surface of the left filter Hypa 1411, so that the dust accumulated on the lower surface of the left filter Hypa 1411 is blown down to the dust collector. In the bucket 11, when the vacuum cleaner 1 works in this working state for a period of time, the left driver 153 and the right driver 152 respectively drive the left switch board 154 and the right switch board 155, so that the left air outlet 1512 is opened, the left air outlet 1514 is closed, and the right air outlet 1512 is closed. The air outlet 1513 is closed and the right air outlet 1515 is opened. The principle of the air flow in this state is similar to that of the previous state, and will not be repeated here.

The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations to the present invention will be apparent to those skilled in the art.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Further modifications can be effected, so the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (10)

1. a kind of reversed bleed type automatically cleaning dust catcher (1), which is characterized in that including：

Dust bucket (11), the dust bucket (11) open wide at an upper portion thereof；

Cover board (13), the cover board (13) are connected to the top of dust bucket (11), and including the opening (131) for pumping；

Filter assemblies (14), the filter assemblies (14) are set at opening (131)；And

Suction opening changeover module (15), the suction opening changeover module (15) are covered in the top of filter assemblies (14), the suction opening Changeover module (15) includes：

The mounting plate (151) being covered at the top of filter assemblies (14)；And

Left suction opening switching mechanism and right suction opening switching mechanism on mounting plate (151),

Wherein, left suction opening (1512), right suction opening (1513), left blowing mouth (1514) and the right side are offered on mounting plate (151) Blowing mouth (1515), left suction opening (1512) and right suction opening (1513) and left blowing mouth (1514) and right blowing mouth (1515) are equal Symmetrical arrangement in the X-axis direction, the left suction opening switching mechanism is to left suction opening (1512) and left blowing mouth (1514) alternative expression closure is carried out, while the right suction opening switching mechanism is to right suction opening (1513) and right blowing mouth (1515) Alternative expression closure is carried out, so that：

When left suction opening (1512) are opened, left blowing mouth (1514) is closed, right suction opening (1513) closing, right blowing mouth (1515) it opens；Or

When left suction opening (1512) are closed, left blowing mouth (1514) is opened, right suction opening (1513) opening, right blowing mouth (1515) it closes.

2. bleed type automatically cleaning dust catcher (1) as described in claim 1 reversed, which is characterized in that filter assemblies (14) include Extra large pa (141) and extra large pa interconnecting piece (142) are filtered, which is filtering the periphery of extra large pa (141) integrally It is upwardly extended in conjunction with the filtering sea pa (141) and along the periphery for filtering extra large pa (141), and the finally bottom surface with mounting plate (151) It is connected, so that being formed with air-flow disengaging storehouse between mounting plate (151) and the extra large pa (141) of filtering.

3. reversed bleed type automatically cleaning dust catcher (1) as claimed in claim 2, which is characterized in that mounting plate (151) and filtering The partition (143) being extended along the Y axis is equipped between extra large pa (141), so that air-flow disengaging storehouse is divided into left disengaging storehouse and the right side Pass in and out storehouse, wherein left suction opening (1512) and left blowing mouth (1514) are connected with the left disengaging storehouse, right suction opening (1513) and right blowing mouth (1515) is connected with the right disengaging storehouse.

4. reversed bleed type automatically cleaning dust catcher (1) as claimed in claim 3, which is characterized in that cover board (13) is equipped with wind Road component (16), the ducting assembly (16) include：

Front motor cover (161), the front motor cover (161) behind open wide by side；And

Motor rear cover, the motor rear cover is connected to the rear side of front motor cover (161) and the two is harmonious to be formed between the two Motor accommodates storehouse,

Wherein, the motor accommodate storehouse include side by side and the left motor bin and right motor bin of connection setting, the left motor bin and Left motor (167) and right motor (168) are respectively arranged in right motor bin, offered on the motor rear cover respectively with left motor (167) and the corresponding left heat radiation air outlet (163) of right motor (168) and right heat radiation air outlet (164).

5. reversed bleed type automatically cleaning dust catcher (1) as claimed in claim 4, which is characterized in that front motor cover (161) packet It includes：

The supplying air bin (162) on front side of storehouse is accommodated set on the motor；And

At least one for accommodating orlop portion set on the motor filters discharge pipe,

Wherein, supplying air bin (162) and the filtering discharge pipe accommodate storehouse with the motor and are connected.

6. reversed bleed type automatically cleaning dust catcher (1) as claimed in claim 5, which is characterized in that the bottom of supplying air bin (162) Equipped with the left air inlet (1621) and right air inlet (1622), left air inlet (1621) and right air inlet that it is connected with the external world (1622) straight line is arranged along the x axis, left air inlet (1621) and right air inlet (1622) respectively with left suction opening (1512) and Right suction opening (1513) is connected.

7. reversed bleed type automatically cleaning dust catcher (1) as claimed in claim 6, which is characterized in that the left suction opening switching Mechanism includes：

Left driver (153) on mounting plate (151)；And

Sliding is covered in the left switch boards (154) on left suction opening (1512) and left blowing mouth (1514),

Wherein, left switch boards (154) are set between left air inlet (1621) and mounting plate (151), open up on left switch boards (154) Have left ventilation port (1541), left switch boards (154) are sequentially connected with left driver (153) so that left switch boards (154) are in left drive In the Y-axis direction toward polyslip under the driving of dynamic device (153) so that left ventilation port (1541) alternately with left suction opening (1512) and left blowing mouth (1514) is connected.

8. reversed bleed type automatically cleaning dust catcher as claimed in claim 6, which is characterized in that the right suction opening switching mechanism Including：

Right driver (152) on mounting plate (151)；And

Sliding is covered in the right switch boards (155) on right suction opening (1513) and right blowing mouth (1515),

Wherein, right switch boards (155) are set between right air inlet (1622) and mounting plate (151), open up on right switch boards (155) Have right ventilation port (1551), right switch boards (155) are sequentially connected with right driver (152) so that right switch boards (155) are in right drive In the Y-axis direction toward polyslip under the driving of dynamic device (152) so that right ventilation port (1551) alternately with right suction opening (1513) it is connected with right blowing mouth (1515).

9. reversed bleed type automatically cleaning dust catcher (1) as claimed in claim 5, which is characterized in that the filtering discharge pipe is set There are two, respectively left discharge pipe (165) and right discharge pipe (166), left discharge pipe (165) and right discharge pipe (166) are about institute It states motor and accommodates the symmetrical arrangement in storehouse.

10. bleed type automatically cleaning dust catcher (1) as claimed in claim 9 reversed, which is characterized in that left discharge pipe (165) and Right discharge pipe (166) extends along the y axis, and the end of left discharge pipe (165) and right discharge pipe (166) holds with the motor Na Cang is connected, and the front end of left discharge pipe (165) and right discharge pipe (166) offers left air outlet (1651) and right outlet air respectively Mouth (1661).