TWM512632U - Air blower device unit structure for motor heat dissipation - Google Patents

Description

Aerator set configuration that can dissipate heat from the motor

The present invention is an air compressor device group structure capable of dissipating heat to a motor, which comprises a box body and an air compressor, the air compressor is housed in the box body, and the wind collecting and guiding design of the box body can be The air flow generated by the operation of the cooling fan of the air compressor is quickly guided to the vent of the motor casing, and enters the inside of the motor casing from the vent to allow the rotor assembly to dissipate heat, and then the through hole at the end of the casing The high-temperature airflow is led out, so that the inside of the motor casing can be used to maximize the output power of the motor due to the inability to accumulate heat, thereby improving the operating efficiency of the motor and extending the service life of the motor.

According to the air compressor, a device for inflating an article to be inflated is generally widely used for air cushioning and tire inflation. Since the air compressor is small in size, it is easy to be carried, and the portable DC power supply can also be used. Or it can be connected to the cigarette lighter socket of the car to provide the power supply of the air compressor, which is quite simple and convenient in operation and use. In general, a conventional air compressor device is mainly composed of a casing that houses an air compressor, and the air compressor drives a piston body to perform a reciprocating compression operation in the cylinder. The compressed air can be transferred to the item to be inflated for the purpose of inflation. When the motor drives the piston body to reciprocate in the cylinder, the high-temperature heat energy generated by the piston accumulates in the motor casing, and the high temperature also accumulates in the casing and cannot be quickly dissipated and released out of the casing, so that high temperature is generated. The phenomenon is caused by an armature including a structure of an armature core, an armature winding, a commutator, or the like, or a rotor (rotor) when the motor starts the rotor. ) all generate high heat, which causes an increase in temperature, especially the contact friction between the commutator and the carbon brush in the armature, which not only causes the entire armature to generate high heat. High heat not only makes carbon brushes easy to produce carbon deposits, but also affects the flow of current. The high heat accumulated in the motor casing also affects the magnetic force of the magnets on the inner wall of the casing, which causes the magnetic force of the magnet to decay. It also causes the operating efficiency of the motor to gradually decrease. Looking at the current car tire damage first-aid device using a small-power motor in the air compressor device, that is to say, it can provide a first-aid device for filling the car and simultaneously inflating the tire after the tire is broken, but due to the traffic laws of some countries When the driver of the car is required to break the tire on the highway, the driver must complete the repair within the time limit prescribed by the law and drive the car away from the incident to prevent the rear car from colliding to protect the safety of all drivers. Therefore, the motor used needs to quickly deal with the damage of the tire in a short time. During the rapid rotation of the motor, most of the high heat generated in the rotation of the rotor accumulates inside the motor casing, and the heat is not effectively dissipated. In this case, the operating efficiency of the motor will be weakened and weakened. When the temperature rises to a certain extent, the insulation of the enamel coil in the armature will be destroyed, causing a short circuit of the enamel coil and burning the entire motor, and even Deriving other dangers. On the other hand, the air compressor is housed in the casing. The current assembly method is only to use the frame strip or the partition of the casing to support the air compressor, and at the same time to stabilize the cylindrical motor. The conventional box does not have an additional design to dissipate heat from the motor. The conventional design of the conventional box body still easily accumulates the high heat generated in the operation of the motor, and cannot assist the heat dissipation of the motor and overcome the latent efficiency in the operation of the motor. Loss and loss of damage.

In view of this, the creator is engaged in design and has created this creation. This is the reason:

The main purpose of the present invention is to provide an air compressor device group structure capable of dissipating heat to a motor, comprising a box body and an air compressor, the box system is composed of an upper cover body and a lower seat body, and the air is compressed. The machine is housed in the casing, and the casing of the motor of the air compressor can be smoothly positioned by the upper and lower guiding portions provided on the upper cover body and the lower seat body, and the wind guiding flow of the upper and lower guiding portions The design system can quickly guide the air flow generated by the operation of the cooling fan of the air compressor and concentrate it on the vent of the motor housing. The air flow entering the motor housing from the vent can allow the rotor inside the motor. The component generates heat dissipation, and the air flow finally can discharge the high-temperature airflow from the through hole of the motor end, so that the motor has heat dissipation and is not easy to accumulate heat and damage, thereby improving the operation efficiency of the motor and prolonging the service life of the motor.

The specific construction and its efficacy according to the present invention for the above purposes are illustrated by the following figures.

In order to understand the structure of the creation in more detail, please refer to the first and second figures. The present invention provides an air compressor device group structure capable of dissipating heat to a motor, which comprises a box body and an air compressor, the box The system is composed of an upper cover 1 and a lower base 2, and the air compressor is housed in a casing assembled by the upper cover 1 and the lower base 2.

The upper cover body 1 has a rectangular frame shape, and the switch 10 is provided with a switch 10 for starting and stopping the air compressor. The front side plate 11 and the rear side plate 12 are formed on both sides of the panel, and the front side plate 11 is provided. There are a plurality of rows of air inlet holes 110, and a plurality of venting holes 120 for exhausting are arranged on the rear side plate 12, and a wind guide is arranged on the inner wall of the panel of the upper cover body 1. The structure design of the flow, the structure of the wind guiding flow is that an upper guiding portion 3 is arranged on the inner wall of the panel of the upper cover body 1, and please refer to the sixth and seventh figures at the same time, and the upper guiding portion 3 is in the panel. The wall has a wire 30 having a length Y ₀ , and a longitudinal wall 31 having a height extending from the wire 30 in a direction away from the panel, the vertical wall 31 acting as a blocking air flow (or forward air flow) The left and right ends of the longitudinal wall 31 are oriented in a direction toward the front side panel 11, and a wind collecting plate 32, 33 is extended in a direction perpendicular or non-perpendicular to the longitudinal wall 31 so as to be located in the casing of the motor 6. The inner wall of the panel above the vent 621 of the body 61 and the two wind collecting plates 32, 33 and the longitudinal wall 31 can be combined An air guiding groove 37, if the wind collecting plates 32, 33 extend perpendicularly to the longitudinal wall 31, the two wind collecting plates 32, 33 and the longitudinal wall 31 can form a generally wind guiding groove 37 (this specification Not shown in the drawings), if the diagonal wind deflectors 32, 33 are extended non-perpendicular to the longitudinal wall 31, the two wind deflectors 32, 33 and the longitudinal wall 31 can form a V-shaped guide wind. The groove 37, the air guiding groove 37 in this state, is more likely to collect the air flow (or the forward flow). Further analyzing the structure of the air guiding groove 37 (refer to the seventh figure), the initial extension point of the two wind collecting plates 32, 33 from the initial extension point of the two wind collecting plates 32, 33, The distance between the two is Y ₁ , but the open collector 34 formed at the end of the second collector 32, 33, the end of the second collector 32, 33 is symmetrical, and the second The distance of the endpoint is Y ₂ , Y ₂ >Y ₁ and Y ₂ >Y ₀ . The upper cover body 1 is provided with an arcuate plate 13 parallel to the front side plate 11 on the inner side of the front side plate 11. The upper flow guiding portion 3 can form a concave arc-shaped supporting portion 35 at the top end of the vertical wall 31; a slope surface 36 can be formed at one end of the vertical wall 31 facing the cooling fan blade 7, and the slope surface 36 can guide Let the forward airflow move more smoothly.

The lower body 2 has an entity corresponding to the rectangular frame shape of the upper cover body 1. The front side plate 21 and the rear side plate 22 are formed on both sides of the panel, and the front side plate 21 is provided with a plurality of rows. The air inlet hole 210 is provided with a plurality of venting holes 220 for exhausting on the rear side plate 22. The inner wall of the panel of the lower base body 2 is also provided with a wind guiding structure. The structure of the wind-guiding flow is that the inner wall of the lower body 2 is provided with a lower flow guiding portion 4, and the specific structure of the lower guiding portion 4 is completely the same as that of the upper guiding portion 3, and the lower guiding flow is the same. The portion 4 has a wire 40 on the inner wall of the panel, the length of the wire 40 being Y ₀ , and a vertical wall 41 having a height extending from the wire 40 in a direction away from the panel, the vertical wall 41 can serve as a blocking air flow. (or the forward airflow), and the left and right ends of the vertical wall 41 are oriented in a direction toward the front side panel 21, and a wind collecting plate 42 is obliquely extended in a direction perpendicular or non-perpendicular to the longitudinal wall 41, 43. The inner wall of the panel located above the vent 622 of the housing 6 of the motor 6 and the second wind collecting plates 42, 43 and the vertical wall 41 can be enclosed. The air guiding groove 47 extends from the wind collecting plates 42 and 43 perpendicular to the vertical wall 41, and the two air collecting plates 42 and 43 and the vertical wall 41 can form an air guiding groove 47 of the general type (the present specification) If not shown in the drawings, if the diagonal windshields 42, 43 are extended non-perpendicular to the longitudinal wall 41, the two windshields 42, 43 and the longitudinal wall 41 can form a V-shaped guide wind. The groove 47, the air guiding groove 37 in this state, is more likely to collect the air flow (or the forward flow). Further analyzing the structure of the air guiding groove 47 (refer to the seventh figure), the initial extension point of the two wind collecting plates 42, 43 from the initial extension point of the two wind collecting plates 42, 43 The distance between the two is Y ₁ , but the open collector 44 formed at the end of the second collector plates 42 and 43 and the end of the two collector plates 42 and 43 are symmetrical. The distance of the endpoint is Y ₂ , Y ₂ >Y ₁ and Y ₂ >Y ₀ . The lower seat body 2 is further provided on the inner side of the front side plate 21 with a lower edge edge plate 23 parallel to the front side plate 21. The lower flow guiding portion 4 can form a concave arc-shaped supporting portion 45 at the top end of the vertical wall 41; a slope surface 46 can be formed at one end of the vertical wall 41 facing the cooling fan blade 7, and the slope surface 46 can guide Let the forward airflow move more smoothly.

Since the air compressor is not the main appeal feature of this creation, in order to make the technical features and functions of the creation clear and unambiguous, it is a brief statement of the implementation of the air compressor and the motor 6 it is equipped with. Referring to the second to fifth figures, an air compressor can be accommodated between the upper cover body 1 and the lower base body 2. The air compressor includes a main frame body 5 and is coupled to the main frame body 5. A cylinder 51, a power mechanism assembled to the main frame 5, and a piston body 85 that can be reciprocated in the cylinder 51 by the power mechanism. The power mechanism includes a motor 6, a pinion 81 for transmission, a large gear 82, a weight rotating disk 83 having a crank pin 84 (refer to FIG. 5), and a heat dissipation blade 7 for heat dissipation use. A rotor assembly 64 is mounted in the housing 61 of the motor 6, and a rotating shaft 60 is disposed at the center thereof. The rotor assembly 64 includes an iron chip 65 wound with an enamel coil 66, a commutator 67, a terminal 68 and a carbon brush 69. The rotating shaft 60 is provided with the above-mentioned pinion 81 at one end, and the heat-dissipating fan blade 7 for heat-dissipating use is disposed at the other end, and the circumscribed surface of the motor 6 housing 61 is provided with symmetrical vents 621, 622 and The surface of the motor 6 at the pinion 81 end is provided with a plurality of through holes 63 (refer to the fifth figure), and the large gear 82 is coupled to the weight rotating disk 83. The weight rotating plate 83 is provided with a shaft and a crank. The pin 84 has one end of the shaft passing through the large gear 82 and pivoted to the main frame body 5, and one end of the crank pin 84 is pivotally connected to the end of the piston body 85. At this time, the pinion gear 81 is engaged with the large gear 82. Pick up. When the air compressor is accommodated in the upper cover body 1 and the lower base body 2, the circumferential surface of the casing 6 of the motor 6 can be provided by the upper and lower guides of the inner surface of the upper cover body 1 and the lower base body 2. The flow portions 3, 4 are clamped to form a stable positioning, that is, both the arc-shaped support portions 35, 45 can support the housing 61 of the motor 6 quite stably, so that the motor 6 does not loosen, tilt or The phenomenon of overturning. After the motor 6 is operated, the pinion 81 drives the large gear 82 so that the piston body 85 can perform a reciprocating compression operation in the cylinder 51.

Please refer to the sixth figure, which is a schematic view of the relative position of the motor 6 when the motor 6 is positioned on the upper and lower flow guiding portions 3, 4, and the rear end 612 of the housing 61 of the motor 6 is facing and most Adjacent to the intake holes 110, 210 of the casing, and the forward end 611 of the casing 61 of the motor 6 is away from the intake holes 110, 210 of the casing and is a venting opening 120, 220 facing the casing, the sixth figure The surface of the forward end of the housing 61 is used as the reference line Y, the rotating shaft 60 of the motor 6 is used as the reference line X, the front end 611 of the housing 61 is set to X=0, and the front end 611 of the housing 61 is connected to the upper and lower ends. The distance between the flow lines 3, 4 between the root lines 30, 40 of the inner wall of the panel is X1, and the distance between the front end 611 of the housing 61 and the vents 621, 622 of the motor is X2, before the housing 61 The distance between the end 611 and the outermost end points of the wind collecting plates 32, 33 and 42, 43 is X3, and the distance between the front end 611 of the casing 61 and the heat dissipating fan blade 7 is X4, and the casing is The distance between the forward end 611 and the intake holes 110, 210 of the casing is 61, and the equidistance length has a structural state of X1 < X2 < X3 < X4 < X5.

Please refer to the third and fifth figures, which are schematic diagrams of assembly and heat conduction of the air compressor when it is built in the casing. When the cooling fan blade 7 at one end of the motor 6 of the air compressor rotates circumferentially, the cooling fan The leaf 7 system can introduce external air from the air inlet holes 110 and 210 provided in the front side panels 11 and 21 of the casing and through the phase assembly and the wind guide plate surrounded by the upper arc edge plate 13 and the lower arc edge plate 23. The ports 130 and 230 are configured to introduce the outside air into the inner surface of the upper cover 1 and the two sets of the two wind collecting plates 32 and 33 which are arranged in a V-shape and the inner surface of the lower body 2 are provided with a V-shaped arrangement. The wind collecting openings 34, 44 of the wind plates 42, 43 and the upper and lower flow guiding portions 3, 4 provided on the inner surfaces of the upper cover body 1 and the lower base body 2 are in contact with the circumference of the vents 621, 622 of the motor 6. The slope surfaces 36, 46 of the vertical walls 31, 41 of the upper and lower flow guiding portions 3, 4 can directly guide the air flow to the vents 621, 622 of the motor 6, and are directly guided by the vents 621, 622. The previous intake air flow generated when the cooling fan blade 7 rotates can cause the carbon brush 69 and the commutator 67 to generate a high heat portion due to friction, and the current flowing paint. And other parts of the cooling coil 66 to be timely, i.e., heat dissipation of the fourth state shown in FIG.

Looking at the foresight, the current stage of air compressors being housed in the box is only by using the frame strips or partitions of the box to support the air compressor, and also to stabilize the cylindrical motor. The case does not provide the function of dissipating heat to the motor. In contrast, the wind-guiding design of the upper and lower flow guiding portions 3, 4 of the casing can quickly guide the air flow generated by the operation of the cooling fan blades 7 of the air compressor to the vents of the casing 61 of the motor 6. 621, 622, and enter the inside of the housing 61 of the motor 6 by the vents 621, 622, so that the rotor assembly 64 generates heat dissipation, and then the high-temperature airflow is led out through the through hole 63 at the end of the housing 61 to make the shell of the motor 6 The inside of the body 61 can exhibit the highest output power of the motor 6 due to the inability to accumulate heat, thereby improving the operating efficiency of the motor 6, and also prolonging the service life of the motor 6. The upper and lower flow guiding portions 3 and 4 of the present invention not only provide the positioning of the motor 6, but also exert the synergistic effect of allowing the motor 6 to dissipate heat in time, and the practical value thereof is far superior to the conventional products.

(1) ‧ ‧ upper cover
(10)‧‧‧Switch
(11) ‧‧‧ front side panels
(110)‧‧‧Air intake
(12) ‧‧‧ rear side panels
(120)‧‧‧ venting holes
(13) ‧‧‧Upper arc edge plate
(130)‧‧‧Guideway
(2) ‧‧‧ lower body
(21)‧‧‧ Front side panels
(210)‧‧‧Air intake
(22) ‧‧‧ rear side panels
(220)‧‧‧ venting holes
(23) ‧‧‧ lower arc edge plate
(230)‧‧‧Guideway
(3) ‧‧‧ upper diversion department
(30) ‧ ‧ root line
(31) ‧ ‧ vertical wall
(32) (33) ‧‧ ‧ wind panels
(34) ‧ ‧ vents
(35) ‧ ‧ support
(36)‧‧‧ slope surface
(37) ‧‧ ‧ wind deflector
(4) ‧‧‧ lower diversion department
(40) ‧‧‧ root line
(41) ‧‧‧ vertical wall
(42) (43) ‧ ‧ wind panels
(44) ‧ ‧ vents
(45) ‧ ‧ support
(46)‧‧‧ slope surface
(47) ‧‧ ‧ wind deflector
(5) ‧‧‧Main frame
(51) ‧‧ ‧ cylinder
(6)‧‧‧Motor
(60) ‧‧‧ shaft
(61) ‧‧‧Shell
(611)‧‧‧ forward end
(612)‧‧‧ Backward end
(621) (622) ‧ ‧ vents
(63)‧‧‧through holes
(64)‧‧‧Rotor components
(65)‧‧‧ Iron Chip
(66)‧‧‧Enameled coil
(67)‧‧‧ commutator
(68) ‧‧‧ terminals
(69)‧‧‧Carbon brush
(7)‧‧‧Dissipation fan blades
(81)‧‧‧小小齿轮
(82) ‧‧‧Gears
(83)‧‧‧ weight rotating disk
(84)‧‧‧ crank pin
(85)‧‧‧ piston body

The first picture: an exploded view of the structure of the aerator set that can dissipate heat from the motor. The second picture is a three-dimensional sectional view of the aerator set that can dissipate heat from the motor. The third figure is an upper perspective view of the air compressor equipment set that can be used to dissipate heat from the motor. Figure 4: A cross-sectional plan view of the structure of the aerator set that can dissipate heat from the motor. The fifth picture: the air compressor of the present invention is built into the partial section assembly diagram of the box body and the heat dissipation and flow guiding diagram. Figure 6 is a schematic diagram showing the relative positions of the rear end of the motor, the flow guiding portion, the air collecting plate, the motor vent, the cooling fan blade, and the air intake hole of the casing. Figure 7: A plan view of the assembled assembly of the present invention.

(1) ‧ ‧ upper cover

(10)‧‧‧Switch

(11) ‧‧‧ front side panels

(110)‧‧‧Air intake

(12) ‧‧‧ rear side panels

(120)‧‧‧ venting holes

(13) ‧‧‧Upper arc edge plate

(2) ‧‧‧ lower body

(21)‧‧‧ Front side panels

(210)‧‧‧Air intake

(22) ‧‧‧ rear side panels

(220)‧‧‧ venting holes

(23) ‧‧‧ lower arc edge plate

(230)‧‧‧Guideway

(3) ‧‧‧ upper diversion department

(31) ‧ ‧ vertical wall

(32) (33) ‧‧ ‧ wind panels

(34) ‧ ‧ vents

(35) ‧ ‧ support

(36)‧‧‧ slope surface

(4) ‧‧‧ lower diversion department

(41) ‧‧‧ vertical wall

(42) (43) ‧ ‧ wind panels

(44) ‧ ‧ vents

(45) ‧ ‧ support

(46)‧‧‧ slope surface

(5) ‧‧‧Main frame

(51) ‧‧ ‧ cylinder

(6)‧‧‧Motor

(60) ‧‧‧ shaft

(61) ‧‧‧Shell

(621) (622) ‧ ‧ vents

(68) ‧‧‧ terminals

(7)‧‧‧Dissipation fan blades

(82) ‧‧‧Gears

(84)‧‧‧ crank pin

(85)‧‧‧ piston body

Claims (8)

An air compressor device group structure capable of dissipating heat to a motor, comprising: a box body, which is formed by combining an upper cover body and a lower seat body, and sides of the upper cover body and the lower seat body are formed on both sides of the panel Relatively to the front side panel and the rear side panel, the front side panel is provided with a plurality of rows of air inlet holes, and the rear side panel is provided with a plurality of venting holes arranged in a row for exhausting; an air compressor, which comprises a motor having a power mechanism, the motor having a rotating shaft, a cooling fan blade disposed at a side end of the rotating shaft of the motor and close to the rear end of the motor casing, the air of the casing being rotated by the air when the cooling fan blade rotates The hole is sucked into the casing, and the circumscribed surface of the casing of the motor is provided with a symmetrical vent, and the air compressor as a whole and the motor thereof are stably accommodated in the casing assembled by the upper cover and the lower seat. The utility model is characterized in that: the inner inner wall of the panel of the upper cover body is provided with a flow guiding portion above the wind collecting structure, and the lower seat body is provided with a wind guiding current on the inner inner wall of the panel facing the upper guiding portion; a flow guiding portion under the structure, the upper cover body and the lower seat body After the positioning, the upper and lower guiding portions of the upper cover body and the inner wall of the lower seat body can support the housing of the motor, and the air vents of the motor housing are located at the air guiding grooves of the upper and lower guiding portions. Within the scope, the air flow sucked by the cooling fan blade can be quickly guided, and the vent of the casing enters the inside of the motor and generates heat dissipation effect, so that the motor is driven to the highest level due to the difficulty of accumulating heat. The output power, which in turn increases the operating efficiency of the motor, while also extending the life of the motor. The structure of the air compressor device group capable of dissipating heat to the motor according to the first aspect of the invention, wherein the upper air guiding portion has a line on the inner wall of the panel, and the length of the root line is Y ₀ , by the root The wire extends in a direction away from the panel to a longitudinal wall having a height; the specific structure of the lower flow guiding portion is completely identical to the upper guiding portion, and the lower guiding portion has a line on the inner wall of the panel, and the length of the wire is Y ₀ , a vertical wall having a height extending from the root line away from the panel; the air flow generated by the operation of the cooling fan blade can be blocked by the vertical wall and collected in the air guiding groove. The air compressor device group structure capable of dissipating heat to the motor according to the first aspect of the invention, wherein the upper cover body is provided with an arc edge plate on the inner side of the front side plate parallel to the front side plate; the lower seat body is on the front side plate. The inner side is further provided with an arcuate plate parallel to the lower side of the front side plate. The structure of the air compressor device group capable of dissipating heat to the motor according to the second aspect of the patent application, wherein the upper guiding portion can form a concave arc-shaped supporting portion at the top end of the longitudinal wall; One side end of the vertical wall can form a slope surface; the lower flow guiding portion can form a concave arc-shaped support portion at the top end of the vertical wall; a slope surface can be formed at one end of the vertical wall facing the heat dissipation fan blade The surface allows the forward airflow to proceed more smoothly. Both the arc-shaped support portions of the upper and lower deflecting portions can support the housing of the motor quite stably, so that the motor does not cause looseness, tilting or tipping. The air compressor device group structure capable of dissipating heat to the motor according to the second aspect of the patent application, wherein the left and right ends of the vertical wall of the upper flow guiding portion respectively extend a wind collecting plate toward the front side plate. The vertical wall and the air collecting plate of the upper guiding portion can be combined to form a wind guiding groove; the left and right ends of the vertical wall of the lower guiding portion each extend a wind collecting plate toward the front side plate. The vertical wall of the lower flow guiding portion and the wind collecting plate can be combined to form a wind guiding groove; the vent of the casing of the motor is located within the range of the air guiding groove of the upper and lower guiding portions. The air compressor device group structure capable of dissipating heat to the motor according to the second aspect of the patent application, wherein the left and right ends of the vertical wall of the upper flow guiding portion extend obliquely away from the vertical wall. The wind plate, the second wind collecting plate and the vertical wall can form a V-shaped wind guiding groove, and an open air collecting port is formed at the end of the second collecting plate; the left and right sides of the vertical wall of the lower guiding portion are The end extends the oblique wind collecting plate non-perpendicular to the longitudinal wall, and the second wind collecting plate and the vertical wall form a V-shaped wind guiding groove, and an open set is formed at the end of the second collecting plate. At the tuyere, this V-shaped air duct is more likely to collect air flow (or forward air flow). The air compressor device group structure capable of dissipating heat to the motor as described in claim 6 of the patent application, the initial extension point of the second wind deflecting plate of the upper guiding portion and the lower guiding portion, and the two initial extension points of the two phases The distance between the two is Y ₁ , and the distance between the outermost end of the two outer wind deflectors of the upper and lower deflectors is the distance between the two outermost end points. The lengths are all Y ₂ , Y ₂ >Y ₁ and Y ₂ >Y ₀ . The air compressor device group structure capable of dissipating heat to the motor according to claim 7, wherein the rear end of the housing of the motor is an air inlet hole facing and closest to the casing, and the casing of the motor The forward end is away from the air inlet of the casing and is a venting hole facing the casing. The surface of the forward end of the casing is used as the reference line Y, the rotating shaft of the motor is used as the reference line X, and the front end of the casing is set to X. =0, the distance between the front end of the casing and the upper and lower flow guiding portions on the inner wall of the inner wall of the panel is X1, and the distance between the front end of the casing and the vent of the motor is X2, and the casing is The distance between the front end and the outermost end end of the air collecting plate is X3, and the distance between the front end of the casing and the cooling fan blade is X4, and the front end of the casing and the air inlet of the casing The distance between the distances is X5, and the distances have a structural state of X1 < X2 < X3 < X4 < X5.