CN210164677U

CN210164677U - Industrial or commercial direct current frequency conversion fan

Info

Publication number: CN210164677U
Application number: CN201920665548.6U
Authority: CN
Inventors: 梁文广
Original assignee: Guangdong Flying Deer Electrical Appliance Co Ltd
Current assignee: Guangdong Flying Deer Electrical Appliance Co Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2020-03-20
Anticipated expiration: 2029-05-09

Abstract

An industrial or commercial direct-current variable-frequency fan comprises a fan head shell, a direct-current variable-frequency motor, a head-shaking synchronous motor, a controller and a driving plate, wherein the direct-current variable-frequency motor, the head-shaking synchronous motor, the controller and the driving plate are respectively arranged in an inner cavity of the fan head shell; a first bracket seat for assembling a head-shaking synchronous motor and a second bracket seat for assembling a driving plate are arranged in the inner cavity of the fan head shell; the first bracket seat and/or the second bracket seat are/is fixedly connected with the direct-current variable frequency motor, the first bracket seat and the second bracket seat are/is connected with each other, the first bracket seat and/or the second bracket seat are/is fixedly connected with the fan head shell through a first fastening unit, and at least part of the first fastening unit is exposed out of the fan head shell; the controller is fixed on the fan head shell; the direct current variable frequency motor, the head shaking synchronous motor and the controller are respectively electrically connected with the driving plate. The utility model has the characteristics of simple structure, heat dispersion are good, the wholeness is strong, the component layout is reasonable etc.

Description

Industrial or commercial direct current frequency conversion fan

Technical Field

The utility model relates to an electric fan, in particular to industrial or commercial direct current variable frequency fan.

Background

In the traditional industrial or commercial electric fan, a large amount of heat is generated when a driving plate works, and the heat dissipation problem of the driving plate is considered, the driving plates of most electric fans are usually required to be arranged externally and independently, so that the electric fan is quite troublesome to install and use, and the user experience is poor; in the market, a driving board is integrated on a fan head, but due to unreasonable layout and the problem of heat dissipation, the size of the fan head is large, the fan head is not convenient to carry, some ventilation structures are generally needed to help heat dissipation, the dustproof and waterproof performance of the fan head is reduced, and dust, moisture, particulate matters and the like easily enter the fan head to cause adverse effects on internal parts; in addition, in the existing industrial or commercial electric fans, the alternating current motor is used for driving the fan blades in view of limited technology, but the work efficiency of the alternating current motor is only 50%, so that the energy consumption of the existing industrial or commercial electric fans is generally high.

Therefore, there is a need for further improvement of the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, heat dispersion are good, the wholeness is strong, the reasonable industrial or commercial direct current variable frequency fan of component layout to overcome the weak point among the prior art.

The industrial or commercial direct-current variable-frequency fan comprises a fan head shell; the method is characterized in that: the fan head shell is characterized by also comprising a direct current variable frequency motor, a head shaking synchronous motor, a controller and a driving plate which are respectively arranged in the inner cavity of the fan head shell; the inner cavity of the fan head shell is provided with a first bracket seat for assembling a head-shaking synchronous motor and a second bracket seat for assembling a driving plate; the first bracket seat and/or the second bracket seat are/is fixedly connected with the direct-current variable frequency motor, the first bracket seat and the second bracket seat are/is connected with each other, the first bracket seat and/or the second bracket seat are/is fixedly connected with the fan head shell through a first fastening unit, and at least part of the first fastening unit is exposed out of the fan head shell; the controller is fixed on the fan head shell; the fan head shell is arranged in a closed manner; the direct current variable frequency motor, the oscillating synchronous motor and the controller are respectively electrically connected with the driving plate.

The first support seat and the second support seat are respectively metal plates with certain heat dissipation performance, one end of the second support seat is fixedly connected with a metal shell of the direct-current variable-frequency motor through the first support seat, the other end of the first support seat is mutually connected with the other end of the second support seat, a heat dissipation aluminum sheet is arranged on the driving plate and is attached to the second support seat, and heat generated by the working of the driving plate is transferred to the metal shell of the first support seat, the second support seat and the direct-current variable-frequency motor and/or the first fastening unit to dissipate heat.

The fan head shell is provided with a control panel corresponding to the controller, the controller is at least provided with a switch key for executing a startup and shutdown instruction, a shaking key for controlling whether to shake a head, an acceleration key for executing a rotation speed increasing instruction, a deceleration key for executing a rotation speed decreasing instruction and a display screen for displaying rotation speed or power, the shaking key is pressed for a long time for 2s, and rotation speed information and power information on the display screen are switched; the controller is in wireless connection with the mobile terminal to realize remote control.

The drive plate is connected with a power line which is led out of the fan head shell, a second avoiding hole is formed in the bottom side of the fan head shell, and the power line penetrates through the second avoiding hole and is led out of the fan head shell.

The front side, the left side, the right side and the top side of the fan head shell are respectively arranged in a closed manner; the fan head shell is formed by mutually sealing and connecting a fan head front shell and a fan head rear shell, the direct-current variable frequency motor is arranged in an inner cavity of the fan head front shell, the head shaking synchronous motor, the drive plate and the controller are jointly integrated in an inner cavity of the fan head rear shell, and the drive plate and the head shaking synchronous motor are sequentially arranged from top to bottom.

The fan head rear shell edge is provided with an annular assembly extending edge, the fan head front shell edge is sleeved on the outer side of the assembly extending edge, the assembly extending edge is provided with a sealing groove, and the sealing groove is provided with a sealing ring.

The direct current variable frequency fan also comprises an oscillating transmission component; a fourth avoidance hole is formed in the bottom side of the fan head shell, a supporting shaft penetrates through the fourth avoidance hole and then is in transfer connection with one end of the oscillating transmission assembly, and an oscillating sealing element is arranged between the supporting shaft and the fourth avoidance hole; the oscillating sealing element comprises an inner sleeve sleeved on the supporting shaft and an outwardly-expanded water storage ring edge, the top of the inner sleeve is in sealing fit with the supporting shaft, a water storage chamber with an opening at the top is formed between the inner sleeve and the water storage ring edge, and a water outlet communicated with the water storage chamber is formed in the water storage ring edge;

a first avoidance hole is formed in the bottom side of the fan head shell, an output shaft of the oscillating synchronous motor penetrates through the first avoidance hole to be exposed, and the output shaft of the oscillating synchronous motor is hinged with the other end of the oscillating transmission assembly;

the temperature sensor is arranged in the inner cavity of the fan head shell and electrically connected with the controller, and a probe of the temperature sensor is at least partially exposed out of the first avoidance hole or the third avoidance hole formed in the bottom side of the fan head shell so as to sense the external environment temperature; the rotating speed range of the direct current variable frequency motor controlled by the driving plate is 0-1500 rpm, preferably 200 rpm and 1400 rpm, the rotating speed of the direct current variable frequency motor controlled by the driving plate changes along with the change of the external environment temperature, the rotating speed is faster when the temperature is higher, and the rotating speed is slower when the temperature is lower.

When the external environment temperature sensed by the temperature sensor is less than or equal to 20 ℃, the rotating speed of the direct current variable frequency motor is 200 revolutions per minute; when the external environment temperature sensed by the temperature sensor is 20-32 ℃, the rotating speed of the direct current variable frequency motor is increased by 100 r/min when the temperature is increased by 1 ℃, and the rotating speed of the direct current variable frequency motor is reduced by 100 r/min when the temperature is reduced by 1 ℃; when the external environment temperature sensed by the temperature sensor is more than or equal to 32 ℃, the rotating speed of the direct current variable frequency motor is 1400 rpm.

The utility model discloses following beneficial effect has:

1. the electric elements such as the driving plate and the controller can be integrated in the fan head shell, the integrity of the electric fan is improved, the electric elements such as the driving plate and the controller do not need to be installed externally, the operation and the use are very convenient, and the user experience is good; in addition, the motor for driving the fan blades adopts a direct-current variable frequency motor (the work efficiency is as high as 80 percent), and the minimum power of the large fan blades (the diameter is 750mm) can reach 3.7W (300 revolutions per minute) by combining the control of a system, so that the energy consumption is greatly reduced;

2. in order to improve the heat dissipation effect, a first bracket seat used for assembling the oscillating synchronous motor and a second bracket seat used for assembling the driving plate are connected with each other, so that the heat dissipation area is greatly increased, a first fastening unit connected with the second bracket seat is exposed, the heat generated by the driving plate can be dissipated to the outside through the first fastening unit, the effective heat dissipation of the driving plate is further ensured, the performance of the driving plate is ensured, and the service life of the driving plate is prolonged;

3. the front side, the left side, the right side and the top side of the fan head shell are respectively arranged in a fully sealed mode, the requirement of IP44 is met, the fan head shell has good waterproof and dustproof functions, water and dust are effectively prevented from entering the fan head shell, the service life of internal parts of the fan head can be prolonged, and the fan head shell can be used in outdoor severe environments;

4. the direct-current variable-frequency fan is provided with a temperature sensor for detecting the external environment temperature, so that the external environment temperature can be detected in real time, and the rotating speed of the fan can be controlled to change along with the change of the external environment temperature by combining a preset control scheme; specifically, when the external environment temperature is less than or equal to 20 ℃, the rotating speed of the motor reaches the lowest 200 revolutions per minute; when the external environment temperature is 20-32 ℃, the rotating speed of the motor is increased by 100 r/min when the temperature is increased by 1 ℃, and the rotating speed of the motor is reduced by 100 r/min when the temperature is reduced by 1 ℃; when the external environment temperature is more than or equal to 32 ℃, the rotating speed of the motor reaches the highest 1400 revolutions per minute;

5. the display screen on the fan head shell can display the real-time rotating speed and/or the real-time power, so that a user can conveniently and visually obtain the real-time parameters of the direct-current variable-frequency fan; the real-time rotating speed of the direct current variable frequency motor is calculated by FOC control and a non-inductive algorithm, and compared with a traditional method for measuring speed by using a Hall technology, the method simplifies the production process and saves the cost.

Drawings

Fig. 1 and fig. 2 are perspective views of a fan head in different directions according to an embodiment of the present invention.

Fig. 3 is an exploded view of a fan head according to an embodiment of the present invention.

Fig. 4 is a top view of a fan head according to an embodiment of the present invention.

Fig. 5 is a sectional view taken along the direction J-J in fig. 4.

Fig. 6 is a cross-sectional view taken along the direction K-K in fig. 4.

Fig. 7 is an enlarged schematic view at L in fig. 5.

Fig. 8 is a cross-sectional view of an oscillating seal according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a fan head casing according to an embodiment of the present invention.

Fig. 10 is a circuit diagram of a controller according to an embodiment of the present invention.

Fig. 11 is a circuit diagram of a driving board according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1 to 11, the industrial or commercial dc frequency conversion fan includes a fan head housing 1, and a dc frequency conversion motor 3, a head shaking synchronous motor 7, a controller 9 and a driving board 10 which are arranged in an inner cavity of the fan head housing 1; a first bracket seat 4 for assembling a head-shaking synchronous motor 7 and a second bracket seat 8 for assembling a driving plate 10 are arranged in the inner cavity of the fan head shell 1; the first bracket seat 4 and the second bracket seat 8 are fixedly connected with the direct-current variable-frequency motor 3 respectively, the first bracket seat 4 and the second bracket seat 8 are connected with each other, the second bracket seat 8 is fixedly connected with the fan head shell 1 through a first fastening unit 15, and at least part of the first fastening unit 15 is exposed out of the rear side of the fan head shell 1; the controller 9 is fixed on the inner top wall of the fan head shell 1, besides, the controller 9 can also be arranged on the inner side wall or the inner rear wall of the fan head shell 1; the fan head shell 1 is arranged in a totally enclosed manner; the direct current variable frequency motor 3, the oscillating synchronous motor 7 and the controller 9 are respectively electrically connected with a driving plate 10. In the structure, the electric elements such as the driving plate 10 and the controller 9 and the like can be integrated in the fan head shell 1, the integrity of the electric fan is improved, the electric elements such as the driving plate 10 and the controller 9 and the like do not need to be externally installed, the operation and the use are very convenient, and the user experience is good; in addition, the motor for driving the fan blades adopts a direct-current variable frequency motor, and is combined with the control of a system, so that the minimum power of the large fan blades (with the diameter of 750mm) can reach 3.7W (300 revolutions per minute), and the energy consumption is greatly reduced; in addition, in order to improve the heat dissipation effect, the first support seat 4 for assembling the oscillating synchronous motor 7 and the second support seat 8 for assembling the driving plate 10 are connected with each other, so that the heat dissipation area is greatly increased, the first fastening unit 15 connected with the second support seat 8 is exposed, heat generated by the driving plate 10 can be dissipated to the outside through the first fastening unit 15, the driving plate 10 can be effectively cooled, the performance of the driving plate 10 is ensured, and the service life of the driving plate is prolonged.

Furthermore, the direct-current variable-frequency fan further comprises a temperature sensor 17 arranged in the inner cavity of the fan head shell 1, the temperature sensor 17 is fixed on the first bracket seat 4 and is electrically connected with the controller 9, and the temperature detected by the temperature sensor 17 is timely fed back to the controller 9; the bottom side 1.6 of the fan head shell 1 is provided with a first avoidance hole 1.7, and a probe of the temperature sensor 17 is at least partially exposed out of the first avoidance hole 1.7 so as to sense the external environment temperature; or, the probe of the temperature sensor 17 passes through a third avoidance hole (not marked in the figure) formed in the bottom side 1.6 of the fan head shell 1 to be exposed, namely, the probe of the temperature sensor 17 is provided with an independent avoidance hole. The driving plate 10 controls the rotating speed range of the direct current variable frequency motor 3 to be 200 and 1400 revolutions/minute; when the system gets into intelligent operating condition, along with external environment temperature's change, the rotational speed of drive plate 10 control direct current inverter motor 3 changes thereupon, and the higher the rotational speed that the temperature is higher is faster, and the lower rotational speed that the temperature is slower to ensure that the user has better heat dissipation body to feel, degree of automation is high under the intelligent state, and it is more convenient to use.

Furthermore, when the external environment temperature sensed by the temperature sensor 17 is less than or equal to 20 ℃, the rotating speed of the direct current variable frequency motor 3 is 200 rpm which is the lowest; when the external environment temperature sensed by the temperature sensor 17 is 20-32 ℃, the rotating speed of the direct current variable frequency motor 3 is increased by 100 r/min when the temperature is increased by 1 ℃, and the rotating speed of the direct current variable frequency motor 3 is reduced by 100 r/min when the temperature is reduced by 1 ℃; when the external environment temperature sensed by the temperature sensor 17 is more than or equal to 32 ℃, the rotating speed of the direct current variable frequency motor 3 is 1400 rpm which is the highest; the relationship between temperature and rotation speed is specified in the following table:

ambient temperature (. degree. C.)	DC frequency conversion motor speed (rotation/minute)
		≤20	200
21	300
		22	400
23	500
		24	600
25	700
		26	800
27	900
		28	1000
29	1100
		30	1200
31	1300
		≥32	1400

Furthermore, an output shaft of the oscillating synchronous motor 7 penetrates through the first avoidance hole 1.7 to be exposed and is hinged with one end of an oscillating transmission assembly 18 below the fan head shell 1; namely, the probe of the temperature sensor 17 and the output shaft of the oscillating synchronous motor 7 are exposed through the first avoiding hole 1.7, so that the number of avoiding holes on the fan head shell 1 can be reduced, and the working procedures are reduced. For improving the leakproofness to do benefit to dustproof and waterproof, be provided with first seal cover 19 on the first hole of dodging 1.7, the first seal cover 19 of passing is rotatable to the output shaft of synchronous motor 7 of shaking the head, and temperature sensor 17 passes first seal cover 19 and exposes.

Furthermore, a fourth avoidance hole 1.9 is formed in the bottom side 1.6 of the fan head shell 1, a supporting shaft 21 is fixed at the bottom of the motor front shell 3.1, the supporting shaft 21 penetrates through the fourth avoidance hole 1.9 and then is in switching connection with the other end of the oscillating transmission assembly 18, and an oscillating sealing element 22 is arranged between the supporting shaft 21 and the fourth avoidance hole 1.9; the oscillating sealing element 22 comprises an inner sleeve 22.1 and an outer water storage ring edge 22.2, the inner sleeve 22.1 is sleeved on the supporting shaft 21, the section of one side of the oscillating sealing element 22 is V-shaped or U-shaped, the top of the inner sleeve 22.1 is in sealing fit with the supporting shaft 21, a water storage chamber 22.3 with an opening at the top is formed between the inner sleeve 22.1 and the water storage ring edge 22.2, and a water outlet 22.4 communicated with the water storage chamber 22.3 is arranged on the water storage ring edge 22.2. When water exists on the surface of the fan head shell 1 and flows to the supporting shaft 21 along the outer wall, the top of the inner sleeve 22.1 is in sealing fit with the supporting shaft 21, so that the influence of the water on the supporting shaft 21 is effectively prevented, and the water can uniformly drop into the water storage chamber 22.3 and is discharged outwards through the water discharge port 22.4.

Further, the first bracket seat 4 and the second bracket seat 8 are respectively a metal plate with certain heat dissipation performance, the first bracket seat 4 is arranged in an L shape, the second bracket seat 8 is arranged in a Z shape or a zigzag shape, one end of the second bracket seat 8 is fixedly connected with the metal shell of the DC variable frequency motor 3 through the first bracket seat 4, the two bracket seats are fixedly connected with the metal shell of the DC variable frequency motor 3 through the second fastening unit 5, the other end of the first bracket seat 4 is mutually connected with the other end of the second bracket seat 8, a heat dissipation aluminum sheet is arranged on the driving plate 10, the heat dissipation aluminum sheet is attached to the second support base 8, the other end of the second support base 8 is fixedly connected with the fan head shell 1 through the first fastening unit 15, and heat generated by the operation of the driving board 10 can be transferred to the first support base 4, the second support base 8, the metal shell of the direct-current variable frequency motor 3 and the first fastening unit 15 for heat dissipation; because the heat dissipation area is large, the heat dissipation effect is good, and the normal work of the driving plate 10 is effectively ensured.

Further, the inner cavity of the fan head shell 1 is divided into a front cavity and a rear cavity, the direct-current variable frequency motor 3 is arranged in the front cavity, the oscillating synchronous motor 7, the drive plate 10 and the controller 9 are respectively arranged in the rear cavity, and the controller 9, the drive plate 10 and the oscillating synchronous motor 7 are sequentially arranged from top to bottom; controller 9, drive plate 10 and the rational distribution of synchronous machine 7 of shaking the head can effectively save space, make whole can hold in the back cavity, overall structure is compact, on the basis that does not change the first volume of traditional fan, can set up electrical components such as controller 9 and drive plate 10 in the fan head, this fan can directly use, and need not the field and carry out external installation to electrical components such as controller 9 and drive plate 10, convenient to use, user experience is good.

Further, a control panel 13 corresponding to the controller 9 is disposed on the top side of the fan head casing 1, and the control panel 13 may also be disposed on the left side, the right side or the rear side of the fan head casing 1 corresponding to the controller 9; the controller 9 is provided with a switch key 9.1 for executing a power on/off instruction, a head shaking key 9.2 for controlling whether to shake the head or not, an acceleration key 9.3 for executing a speed increasing instruction, a deceleration key 9.4 for executing a speed reducing instruction and a display screen 9.5 for displaying the rotating speed and/or power; the switch key 9.1 can be pressed for a short time or a long time to control the on-off of the fan; the short pressing of the acceleration key 9.3 or the deceleration key 9.4 realizes corresponding step-by-step adjustment of the rotating speed, the long pressing of the acceleration key 9.3 or the deceleration key 9.4 realizes corresponding rapid adjustment of the rotating speed, and the display screen 9.5 displays relevant rotating speed information; the shaking head key is pressed for 9.22 s for a long time, the rotating speed information and the power information on the display screen 9.5 are switched, and of course, other keys can be arranged for controlling information switching; the controller 9 is wirelessly connected with the mobile terminal to realize remote control. In the intelligent state, any key is manually operated, and the system can exit from the intelligent state and enter the manual state. The display screen 9.5 on the fan head shell 1 can display real-time rotating speed or real-time power, so that a user can conveniently and visually obtain real-time parameters of the direct-current variable-frequency fan; the real-time rotating speed of the direct current variable frequency motor is calculated by FOC control and a non-inductive algorithm, and compared with a traditional method for measuring speed by using a Hall technology, the method simplifies the production process and saves the cost.

Furthermore, the driving board 10 is connected with a power line 16 which is led out of the fan head shell 1, a second avoidance hole 1.8 is formed in the bottom side 1.6 of the fan head shell 1, and the power line 16 penetrates through the second avoidance hole 1.8 and is led out of the fan head shell 1; in order to improve the sealing performance, a second sealing sleeve 20 is arranged on the second avoidance hole 1.8, and the power line 16 penetrates through the second sealing sleeve 20. First hole 1.7 and the second of dodging dodge and dodge hole 1.8 and set up respectively in fan head casing 1 bottom side, can be effectively waterproof dustproof, reduce the external environment influence that fan head casing 1 internals received.

Further, the front side 1.1, the left side 1.3, the right side 1.4 and the top side 1.5 of the fan head casing 1 are respectively arranged in a closed manner; the fan head shell 1 is formed by mutually and hermetically connecting a fan head front shell 2 and a fan head rear shell 12, the direct-current variable-frequency motor 3 is arranged in the inner cavity of the fan head front shell 2, and the oscillating synchronous motor 7, the drive plate 10 and the controller 9 are jointly integrated in the inner cavity of the fan head rear shell 12; on the premise that the front side 1.1 of the fan head shell 1 is not influenced in closed arrangement, an output shaft of the direct-current variable frequency motor 3 penetrates through the front side 1.1 of the fan head shell 1; the rear side 1.2 of the fan head shell 1 is provided with a fourth avoidance hole 1.10, the head of the first fastening element 15 is exposed out of the fourth avoidance hole 1.10, and the first fastening element 14 is in sealing fit with the fourth avoidance hole 1.10. Direct current inverter motor 3 includes preceding shell 3.1 of motor and motor backshell 3.2, 4 fixed connection motor backshells of first support seat 3.2, preceding shell 3.1 of motor sets up with preceding 2 disconnect-type (current four-piece structure) of the first preceding shell of fan or integral type (current three-piece structure), when the integral type sets up, preceding shell 3.1 of motor and the first preceding 2 integrative die-casting of the first preceding shell of fan, the material is cast iron or cast aluminium etc. this kind of integral type structure makes the dismouting of fan head convenient and fast more, and the structure is firm more reliable.

Furthermore, the edge of the fan head rear shell 12 is provided with an annular assembly extending edge 12.1, the edge of the fan head front shell 2 is sleeved outside the assembly extending edge 12.1, the assembly extending edge 12.1 is provided with an annular sealing groove, and the sealing groove is provided with a sealing ring 11; in order to further improve the sealing performance, sealant can be filled or welded between the edge of the fan head front shell 2 and the edge of the fan head rear shell 12.

The foregoing is a preferred embodiment of the present invention showing and describing the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and the scope of the invention is to be protected. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An industrial or commercial direct-current variable-frequency fan comprises a fan head shell (1); the method is characterized in that: the fan head is characterized by also comprising a direct-current variable frequency motor (3), a head shaking synchronous motor (7), a controller (9) and a driving plate (10) which are respectively arranged in the inner cavity of the fan head shell (1); a first bracket seat (4) for assembling a head-shaking synchronous motor (7) and a second bracket seat (8) for assembling a driving plate (10) are arranged in the inner cavity of the fan head shell (1); the first bracket seat (4) and/or the second bracket seat (8) are fixedly connected with the direct-current variable-frequency motor (3), the first bracket seat (4) is connected with the second bracket seat (8), the first bracket seat (4) and/or the second bracket seat (8) are fixedly connected with the fan head shell (1) through a first fastening unit (15), and at least part of the first fastening unit (15) is exposed out of the fan head shell (1); the direct current variable frequency motor (3), the oscillating synchronous motor (7) and the controller (9) are respectively electrically connected with the drive plate (10).

2. The industrial or commercial dc variable frequency fan according to claim 1, wherein: first support seat (4) and second support seat (8) are the metal sheet that has certain heat dispersion respectively, the metal casing fixed connection of first support seat (4) and DC inverter motor (3) is passed through to second support seat (8) one end, first support seat (4) other end and second support seat (8) other end interconnect, be provided with the heat dissipation aluminum sheet on drive plate (10), the heat dissipation aluminum sheet laminates on second support seat (8), the heat transmission that drive plate (10) work produced is to first support seat (4), second support seat (8), the metal casing of DC inverter motor (3) and/or dispels the heat on first fastening unit (15).

3. The industrial or commercial dc variable frequency fan according to claim 2, wherein: the fan head comprises a fan head shell (1), and is characterized in that a control panel (13) corresponding to a controller (9) is arranged on the fan head shell (1), at least a switch key (9.1) for executing a power on/off instruction is arranged on the controller (9), a head shaking key (9.2) for controlling whether to shake the head or not, an acceleration key (9.3) for executing a speed increasing instruction, a speed reducing key (9.4) for executing a speed reducing instruction and a display screen (9.5) for displaying rotating speed or power, the head shaking key (9.2) is pressed for a long time for 2s, and rotating speed information and power information on the display screen (9.5) are switched with each other.

4. The industrial or commercial dc variable frequency fan according to claim 1, wherein: the driving plate (10) is connected with a power line (16) leading out the fan head shell (1), a second avoiding hole (1.8) is formed in the bottom side (1.6) of the fan head shell (1), and the power line (16) penetrates through the second avoiding hole (1.8) and leads out the fan head shell (1).

5. The industrial or commercial dc variable frequency fan according to claim 1, wherein: the front side (1.1), the left side (1.3), the right side (1.4) and the top side (1.5) of the fan head shell (1) are respectively arranged in a closed manner; fan head casing (1) is formed by fan head preceding shell (2) and fan head backshell (12) sealing connection each other, and direct current inverter motor (3) set up in fan head preceding shell (2) inner chamber, and synchronous machine (7), drive plate (10) and controller (9) of shaking the head are integrated in fan head backshell (12) inner chamber jointly, and drive plate (10) and synchronous machine (7) of shaking the head are from last down arranging in proper order.

6. The industrial or commercial dc variable frequency fan according to claim 5, wherein: the fan head rear shell (12) edge is equipped with annular assembly and extends limit (12.1), and the assembly is located to fan head front shell (2) edge cover and is extended limit (12.1) outside, and the assembly is prolonged and is equipped with the seal groove on limit (12.1), is provided with sealing washer (11) on the seal groove.

7. The industrial or commercial dc variable frequency fan according to claim 1, wherein: the swing head transmission assembly (18) is also included; a fourth avoidance hole (1.9) is formed in the bottom side (1.6) of the fan head shell (1), a supporting shaft (21) penetrates through the fourth avoidance hole (1.9) and then is in switching connection with one end of the oscillating transmission assembly (18), and an oscillating sealing element (22) is arranged between the supporting shaft (21) and the fourth avoidance hole (1.9); the oscillating sealing element (22) comprises an inner sleeve (22.1) sleeved on the supporting shaft (21) and an outer water storage ring edge (22.2), the top of the inner sleeve (22.1) is in sealing fit with the supporting shaft (21), a water storage chamber (22.3) with an opening at the top is formed between the inner sleeve (22.1) and the water storage ring edge (22.2), and a water outlet (22.4) communicated with the water storage chamber (22.3) is formed in the water storage ring edge (22.2).

8. The industrial or commercial dc variable frequency fan according to claim 7, wherein: the fan head is characterized in that a first avoiding hole (1.7) is formed in the bottom side (1.6) of the fan head shell (1), an output shaft of the oscillating synchronous motor (7) penetrates through the first avoiding hole (1.7) to be exposed, and the output shaft of the oscillating synchronous motor (7) is hinged to the other end of the oscillating transmission assembly (18).

9. The industrial or commercial dc variable frequency fan of claim 8, wherein: a temperature sensor (17) is arranged in the inner cavity of the fan head shell (1), the temperature sensor (17) is electrically connected with the controller (9), and at least part of a probe of the temperature sensor (17) is exposed out of the first avoidance hole (1.7) or a third avoidance hole formed in the bottom side (1.6) of the fan head shell (1) to sense the external environment temperature; the rotating speed range of the direct current variable frequency motor (3) controlled by the driving plate (10) is 0-1500 rpm, the rotating speed of the direct current variable frequency motor (3) controlled by the driving plate (10) changes along with the change of the external environment temperature, the rotating speed is faster when the temperature is higher, and the rotating speed is slower when the temperature is lower.

10. The industrial or commercial dc variable frequency fan of claim 9, wherein: when the external environment temperature sensed by the temperature sensor (17) is less than or equal to 20 ℃, the rotating speed of the direct current variable frequency motor (3) is 200 revolutions per minute; when the external environment temperature sensed by the temperature sensor (17) is 20-32 ℃, the rotating speed of the direct current variable frequency motor (3) is increased by 100 r/m when the temperature is increased by 1 ℃, and the rotating speed of the direct current variable frequency motor (3) is reduced by 100 r/m when the temperature is reduced by 1 ℃; when the external environment temperature sensed by the temperature sensor (17) is more than or equal to 32 ℃, the rotating speed of the direct current variable frequency motor (3) is 1400 rpm.