CN112197249B

CN112197249B - Plug-in type waterproof LED power supply

Info

Publication number: CN112197249B
Application number: CN202011247872.XA
Authority: CN
Inventors: 郑华
Original assignee: Anhui Hengying Electronic Technology Co ltd
Current assignee: Anhui Hengying Electronic Technology Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2022-06-28
Anticipated expiration: 2040-11-10
Also published as: CN112197249A

Abstract

The invention discloses a plug-in type waterproof LED power supply which comprises a shell, a PCB, an electric wire and a plug, wherein the PCB is fixedly connected inside the shell, the plug and the electric wire are respectively and electrically connected with the PCB, the shell comprises a barrel, a front end cover and a rear end cover, the front end cover and the rear end cover are respectively and fixedly connected with two ends of the barrel in a covering manner, the PCB is positioned inside the barrel, and the PCB is fixedly connected with one surface of the front end cover, which is close to the rear end cover; the plug-in type waterproof LED power supply also comprises a blowing device, the blowing device is fixedly connected inside the barrel, the rear end cover is provided with an air inlet, and the air inlet is connected with the air inlet end of the blowing device; the face, away from the rear end cover, of the front end cover is provided with a groove, the plug is fixedly connected with the front end cover and located on the inner side of the groove, the plug extends out of the groove, the front end cover is provided with an air outlet, the air outlet is communicated with the groove, the air outlet end of the air blowing device is communicated with the air outlet, and the air blowing device is electrically connected with the PCB.

Description

Plug-in type waterproof LED power supply

Technical Field

The invention relates to the technical field of power supplies, in particular to a plug-in type waterproof LED power supply.

Background

The LED power supply is one of power supplies, and is a device for supplying power to an electronic device, and is also a power supply. The device is a device for converting alternating current into direct current through a transformer and a rectifier, and the device is called a rectifying power supply and is also called a driving power supply.

An LED power supply in the prior art generally includes a housing, a PCB and a plug, the PCB is fixed inside the housing, the plug is vertically fixed on one of the end surfaces of the housing, the plug is electrically connected to the PCB, when the plug is plugged into a socket, the PCB can be powered on, and each electronic component on the PCB adjusts an input current and a voltage and outputs the adjusted input current and voltage to an LED lamp.

When the LED power supply is used on equipment for water operation such as ships, the LED power supply is often in an environment which is easy to contact with water (rainwater, seawater, river water and the like), but the LED power supply in the prior art usually has no waterproof function, and faults such as short circuit, corrosion and the like are easy to cause after a plug is soaked.

Disclosure of Invention

The present invention is directed to a plug-in waterproof LED power supply to solve at least one of the problems set forth in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a plug-in type waterproof LED power supply comprises a shell, a PCB, a wire and a plug, wherein the PCB is fixedly connected inside the shell, the plug and the wire are respectively and electrically connected with the PCB, the shell comprises a barrel, a front end cover and a rear end cover, the front end cover and the rear end cover are respectively and fixedly connected with two ends of the barrel in a covering mode, the PCB is located inside the barrel, and the PCB is fixedly connected with one surface, close to the rear end cover, of the front end cover; the plug-in type waterproof LED power supply also comprises a blowing device, the blowing device is fixedly connected inside the barrel, the rear end cover is provided with an air inlet, and the air inlet is connected with the air inlet end of the blowing device; the air blowing device comprises a front end cover, a rear end cover, a plug, a groove, an air outlet, a blowing device and a PCB, wherein the front end cover is provided with the groove on one side far away from the rear end cover, the plug is fixedly connected with the front end cover, the plug is positioned on the inner side of the groove, the plug extends out of the groove, the front end cover is provided with the air outlet, the air outlet is communicated with the groove, the air outlet end of the blowing device is communicated with the air outlet, and the blowing device is electrically connected with the PCB.

According to the plug-in type waterproof LED power supply provided by the invention, in the working process, the plug is plugged in the socket, one surface of the front end cover, which is far away from the rear end cover, is abutted against the surface of the socket, after the PCB is electrified, the air blowing device starts to work, air is sucked from the air inlet and exhausted into the groove, the air pressure in the groove is increased, and air flow flows out from a gap between the surface of the socket and the front end cover. When the rainwater flows in the clearance between socket surface and the front end housing along the socket surface, the inside air of recess blows off the rainwater in the clearance and blows off the clearance, prevents in the rainwater further flows in the recess to avoid plug and water contact, improve the security of the waterproof type LED power of plug-in type.

In a possible embodiment of the invention, a partition board is fixedly connected to the bottom surface of the groove, the partition board is arranged around the plug, the air outlet is located between the inner side wall of the groove and the outer side wall of the partition board, a gap is formed between the outer side wall of the partition board and the inner side wall of the groove, the height of the partition board is H1, and the depth of the groove is H2, wherein H2 > H1.

Through the possible implementation manner of the invention, when a small amount of rainwater breaks through the air pressure and enters the groove, the rainwater flows downwards along the inner wall of the groove, the partition board can prevent the rainwater from flowing into the inner side of the partition board, so that the rainwater is prevented from contacting the plug, after one surface of the front end cover, far away from the rear end cover, is abutted against the surface of the socket, a gap is formed between one surface of the partition board, far away from the rear end cover, and the surface of the socket, so that the close fit degree between one surface of the front end cover, far away from the rear end cover, and the surface of the socket can be improved.

In a possible embodiment of the present invention, the blowing device is located between the rear end cover and the PCB board, the PCB board is located between the blowing device and the front end cover, the rear end cover, the blowing device, the PCB board and the front end cover are arranged in a straight line, a third air chamber is formed between the blowing device and the front end cover, the PCB board is located inside the third air chamber, an air outlet end of the blowing device is communicated with the third air chamber, and the third air chamber is communicated with the air outlet.

Through the possible implementation manner of the invention, when the PCB is in operation, the PCB generates heat, the air blowing device blows air into the third air chamber, hot air in the third air chamber is blown out from the air outlet, the temperature of the air temperature in the groove is increased, a small amount of water which breaks through the air pressure and enters the groove is evaporated more quickly and is discharged out of the groove in a steam form, the socket surface and the inner wall of the groove at the inner side of the groove are kept dry, and meanwhile, the PCB is cooled.

In a possible implementation manner of the present invention, the rear end cover includes a first rear cover plate and a second rear cover plate, the first rear cover plate is fixedly connected with the edge of the second rear cover plate in a sealing manner, a gap is formed between the first rear cover plate and the second rear cover plate, and a first air chamber is formed, the first rear cover plate is fixedly connected with one end of the barrel away from the front end cover, the air inlet is located at the bottom end of the second rear cover plate, the air inlet is communicated with the first air chamber, an air inlet hole is arranged on the first rear cover plate, the air inlet hole is communicated with the first air chamber, the air inlet hole is higher than the air inlet, and the air inlet hole is communicated with the air inlet end of the air blowing device.

Through the possible implementation manner of the invention, rainwater flows downwards along the outer wall of the rear end cover, the second rear cover plate can prevent the rainwater from flowing into the first air chamber, and when the air blowing device works, air enters the air blowing device from the air inlet, the first air chamber and the air inlet hole in sequence, so that the rainwater can be prevented from being sucked into the air blowing device.

In a possible implementation manner of the invention, the air blowing device comprises a driving device, fan blades and an air duct, the driving device is electrically connected with the PCB, the fan blades are located in the air duct, the driving device is in transmission connection with the fan blades, one end of the air duct is communicated with the air inlet, and the other end of the air duct is communicated with the third air chamber.

With the above possible embodiment of the present invention, the driving means draws air from the air inlet and blows air to the third air chamber when the fan blade is driven to rotate.

In one possible embodiment of the present invention, the driving device is an electric motor, the electric motor is electrically connected to the PCB, an output shaft of the electric motor is fixedly connected to a rotational center portion of the fan blade, and the electric motor is located between the fan blade and the air inlet.

Through the possible implementation manner of the invention, the electric motor extracts air from the air inlet when working, the air flow enters the third air chamber from the branch passage after passing through the electric motor, and the air flow can cool the electric motor in the process of passing through the electric motor, so that the phenomenon that the temperature inside the cylinder is too high due to continuous heating of the electric motor is avoided.

In a possible embodiment of the present invention, the blowing device further includes a fixing sleeve, the fixing sleeve is located inside the barrel, one end of the fixing sleeve is fixedly connected to one surface of the first rear cover plate, which is far away from the second rear cover plate, in a sealing manner, the air duct is located at one end of the fixing sleeve, which is far away from the first rear cover plate, the electric motor is located inside the fixing sleeve, and the air inlet is located inside the fixing sleeve.

Through the possible implementation manner of the invention, the air inlet hole is surrounded on the inner side by the fixed sleeve, the air inlet hole must flow through the electric motor in the process of entering the third air chamber through the branch passage, the cooling efficiency of the electric motor is improved, and the air temperature entering the third air chamber from the air passage is raised, but the air can be quickly discharged to the groove and finally discharged to the outside air.

In one possible embodiment of the invention, a second air chamber is formed with a gap between the electric motor and the first back cover plate.

Through the possible implementation manner of the invention, after passing through the air inlet hole and entering the second air chamber, the air is buffered in the second air chamber, then is gradually sucked into the air duct, and finally enters the third air chamber, and the second air chamber can avoid the electric motor from blocking the air inlet hole, so that the flow cross section of the air flow can be increased, the resistance to the air flow is reduced, and the speed of the air flow is increased.

In a possible embodiment of the present invention, the blower device further includes a holder, the holder is located between an outer wall of the electric motor and an inner wall of the fixing sleeve, the holder is fixedly connected to the electric motor and the fixing sleeve, an air flow passage is provided between the holder and the electric motor, the air flow passage is communicated with the second air chamber and the air duct, and the holder is made of an elastic material.

According to the possible embodiment of the invention, the retainer is made of rubber or elastic plastic or silica gel, so that the electric motor can be buffered, the vibration of the plug-in waterproof LED power supply during working is reduced, and the noise is reduced.

In a possible embodiment of the present invention, a surface of the front end cap remote from the rear end cap is coated with a hydrophobic layer, and the hydrophobic layer is located outside the groove.

Through the possible implementation mode of the invention, the hydrophobic layer can prevent water from diffusing to the surface of the hydrophobic layer by utilizing the tension of the water surface, the hydrophobic layer is abutted against the surface of the socket, the gap between the hydrophobic layer and the surface of the socket is small, under the repulsion action of the hydrophobic layer, external water is difficult to enter the gap between the hydrophobic layer and the surface of the socket, and under the action of the pressure difference that the air pressure in the groove is higher than the external air pressure, the external water is difficult to enter the inner side of the groove.

Drawings

FIG. 1 is a schematic structural diagram of a plug-in waterproof LED power supply in an embodiment of the invention;

FIG. 2 is an exploded view of a plug-in waterproof LED power supply in an embodiment of the invention;

FIG. 3 is a schematic structural view of a front end cap in an embodiment of the invention;

FIG. 4 is an exploded view of the rear end cover and the blower unit in an embodiment of the present invention;

FIG. 5 is an exploded view of the rear end cap and blower unit from another perspective of FIG. 4;

FIG. 6 is a schematic structural view of a rear end cap in an embodiment of the present invention;

FIG. 7 is a sectional view taken along line A-A of FIG. 1;

Fig. 8 is a sectional view taken in the direction B-B in fig. 7.

Description of the reference numerals:

100. a housing; 110. a barrel; 111. a third air chamber; 120. a front end cover; 121. a groove; 122. an air outlet; 123. a partition plate; 124. a hydrophobic layer; 130. a rear end cap; 131. a first rear cover plate; 132. a second rear cover plate; 133. an air inlet; 134. an air inlet; 135. a first air chamber; 200. a plug; 300. an electric wire; 400. a PCB board; 500. a blower device; 510. an electric motor; 520. a fan blade; 530. fixing the sleeve; 531. an air duct; 532. a second air chamber; 540. a holder; 541. an air flow channel.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

Referring to fig. 1 to 3, in an embodiment of the present invention, a plug-in waterproof LED power supply is provided, including a housing 100, a PCB 400, an electric wire 300 and a plug 200, where the PCB 400 is fixedly connected inside the housing 100, the plug 200 and the electric wire 300 are respectively electrically connected to the PCB 400, the housing 100 includes a cylinder 110, a front end cover 120 and a rear end cover 130, the front end cover 120 and the rear end cover 130 are respectively and fixedly connected to two ends of the cylinder 110, the PCB 400 is located inside the cylinder 110, and the PCB 400 is fixedly connected to one surface of the front end cover 120 close to the rear end cover 130; the plug-in type waterproof LED power supply further comprises a blowing device 500, the blowing device 500 is fixedly connected inside the barrel 110, the rear end cover 130 is provided with an air inlet 134, and the air inlet 134 is connected with the air inlet end of the blowing device 500; one side of the front end cover 120, which is far away from the rear end cover 130, is provided with a groove 121, the plug 200 is fixedly connected with the front end cover 120, the plug 200 is located inside the groove 121, the plug 200 extends out of the groove 121, the front end cover 120 is provided with an air outlet 122, the air outlet 122 is communicated with the groove 121, an air outlet end of the air blowing device 500 is communicated with the air outlet 122, and the air blowing device 500 is electrically connected with the PCB 400.

In the plug-in waterproof type LED power supply provided by this embodiment, during operation, the plug 200 is plugged into the socket, one surface of the front end cover 120 away from the rear end cover 130 abuts against the surface of the socket, after the PCB 400 is powered on, the blower 500 starts to operate, sucks air from the air inlet 134, and exhausts air into the groove 121, the air pressure inside the groove 121 increases, and the air flow flows out from the gap between the surface of the socket and the front end cover 120. When rainwater flows to the gap between the socket surface and the front end cover 120 along the socket surface, the rainwater in the gap is blown out of the gap by the air in the groove 121, so that the rainwater is prevented from further flowing into the groove 121, the plug 200 is prevented from contacting water, and the safety of the plug-in type waterproof LED power supply is improved.

In a possible implementation manner of this embodiment, a partition 123 is fixedly connected to a bottom surface of the groove 121, the partition 123 is disposed around the plug 200, the air outlet 122 is located between an inner sidewall of the groove 121 and an outer sidewall of the partition 123, a gap is provided between the outer sidewall of the partition 123 and the inner sidewall of the groove 121, a height of the partition 123 is H1, and a depth of the groove 121 is H2, where H2 > H1.

Through the above possible implementation manner of this embodiment, after a small amount of rainwater broke through atmospheric pressure and got into inside recess 121, the rainwater flowed down along the recess 121 inner wall, baffle 123 can stop that rainwater flows into baffle 123 inboard, avoid rainwater and plug 200 contact, the one side that rear end cap 130 was kept away from to front end housing 120 is with the surperficial butt back of socket, the one side that rear end cap 130 was kept away from to baffle 123 has the interval with the socket surface between, can improve the laminating degree of closeness between the one side that rear end cap 130 was kept away from to front end cap 120 and the socket surface.

Referring to fig. 4 to 6, in a possible implementation manner of the present embodiment, the blowing device 500 is located between the rear end cover 130 and the PCB 400, the PCB 400 is located between the blowing device 500 and the front end cover 120, the rear end cover 130, the blowing device 500, the PCB 400 and the front end cover 120 are arranged in a straight line, a third air chamber 111 is formed between the blowing device 500 and the front end cover 120, the PCB 400 is located inside the third air chamber 111, an air outlet end of the blowing device 500 is communicated with the third air chamber 111, and the third air chamber 111 is communicated with the air outlet.

Through the above possible implementation manner of this embodiment, when the PCB 400 is in operation, the air blowing device 500 blows air into the third air chamber 111, so as to blow out hot air inside the third air chamber 111 from the air outlet 122, thereby increasing the temperature of the air temperature inside the groove 121, so that a small amount of water which breaks through the air pressure and enters the groove 121 is evaporated faster and is discharged out of the groove 121 in the form of steam, so that the socket surface inside the groove 121 and the inner wall of the groove 121 are kept dry, and meanwhile, the PCB 400 is cooled.

Referring to fig. 6 to 8, in a possible implementation manner of this embodiment, the rear end cover 130 includes a first rear cover plate 131 and a second rear cover plate 132, the first rear cover plate 131 is fixedly connected to the second rear cover plate 132, edges of the first rear cover plate 131 and the second rear cover plate 132 are fixedly connected in a sealing manner, a gap is formed between the first rear cover plate 131 and the second rear cover plate 132, and a first air chamber 135 is formed, the first rear cover plate 131 is fixedly connected to one end of the barrel 110 away from the front end cover 120, the air inlet 134 is located at a bottom end of the second rear cover plate 132, the air inlet 134 is communicated with the first air chamber 135, the first rear cover plate 131 is provided with an air inlet hole 133, the air inlet hole 133 is communicated with the first air chamber 135, the air inlet hole 133 is higher than the air inlet 134, and the air inlet hole 133 is communicated with an air inlet end of the air blowing device 500.

Through the above possible implementation manner of this embodiment, rainwater flows downwards along the outer wall of the rear end cover 130, the second rear cover plate 132 can prevent rainwater from flowing into the first air chamber 135, and when the air blowing device 500 is in operation, air enters the air blowing device 500 from the air inlet 134, the first air chamber 135 and the air inlet holes 133 in sequence, and rainwater can be prevented from being sucked into the air blowing device 500.

In a possible implementation manner of this embodiment, the air blowing device 500 includes a driving device, fan blades 520, and an air duct 531, the driving device is electrically connected to the PCB 400, the fan blades 520 are located in the air duct 531, the driving device is in transmission connection with the fan blades 520, one end of the air duct 531 is communicated with the air inlet 133, and the other end of the air duct 531 is communicated with the third air chamber 111.

With the above possible implementation of the present embodiment, the driving device draws air from the air intake holes 133 and blows air to the third air chamber 111 when driving the fan blades 520 to rotate.

In a possible implementation manner of this embodiment, the driving device is an electric motor 510, the electric motor 510 is electrically connected to the PCB 400, an output shaft of the electric motor 510 is fixedly connected to a rotation center portion of the fan blades 520, and the electric motor 510 is located between the fan blades 520 and the air inlet.

Through the above possible implementation manner of this embodiment, the electric motor 510 extracts air from the air inlet 133 during operation, the air flow enters the third air chamber 111 through the branch passage after passing through the electric motor 510, and the air flow can cool the electric motor 510 in the process of passing through the electric motor 510, so as to avoid that the electric motor 510 continuously generates heat to cause an excessively high temperature inside the barrel 110.

In a possible implementation manner of this embodiment, the air blowing device 500 further includes a fixing sleeve 530, the fixing sleeve 530 is located inside the barrel 110, one end of the fixing sleeve 530 is fixedly connected to one surface of the first rear cover plate 131 far away from the second rear cover plate 132 in a sealing manner, the air duct 531 is located at one end of the fixing sleeve 530 far away from the first rear cover plate 131, the electric motor 510 is located inside the fixing sleeve 530, and the air intake hole 133 is located inside the fixing sleeve 530.

With the above possible implementation of this embodiment, the fixing sleeve 530 surrounds the air inlet hole 133 on the inner side, the air inlet hole 133 must pass through the electric motor 510 during the process of entering the third air chamber 111 through the branch passage, so as to improve the cooling efficiency of the electric motor 510, and the air temperature after entering the third air chamber 111 from the air duct 531 is raised, but can be quickly discharged to the groove 121, and finally discharged to the outside air.

In one possible implementation of the present embodiment, the electric motor 510 and the first back cover plate 131 have a gap therebetween and form a second air chamber 532.

With the above possible embodiments of the present embodiment, after entering the second air chamber 532 through the air inlet hole 133, the air is buffered in the second air chamber 532, and then gradually sucked into the air duct 531, and finally enters the third air chamber 111, and the second air chamber 532 can avoid the electric motor 510 from blocking the air inlet hole 133, can increase the flow cross section of the air flow, reduce the resistance to the air flow, and increase the air flow speed.

In a possible implementation manner of this embodiment, the blowing device 500 further includes a holder 540, the holder 540 is located between an outer wall of the electric motor 510 and an inner wall of the fixing sleeve 530, the holder 540 is fixedly connected to the electric motor 510 and the fixing sleeve 530, an air flow channel 541 is formed between the holder and the electric motor 510, the air flow channel 541 is communicated with the second air chamber 532 and the air duct 531, and the holder 540 is made of an elastic material.

Through the above possible implementation manner of the present embodiment, the holder 540 is made of rubber, elastic plastic, or silicon rubber, and can buffer the electric motor 510, reduce the vibration of the plug-in waterproof LED power supply during operation, and reduce noise.

In a possible implementation manner of this embodiment, a surface of the front end cap 120 away from the rear end cap 130 is coated with a hydrophobic layer 124, and the hydrophobic layer 124 is located outside the groove 121.

Through the above possible implementation manner of this embodiment, the hydrophobic layer 124 can prevent water from diffusing to the surface of the hydrophobic layer 124 by using the tension of the water surface, the hydrophobic layer 124 abuts against the surface of the socket, the gap between the hydrophobic layer 124 and the socket surface is relatively small, under the repulsive action of the hydrophobic layer 124, external water is difficult to enter the gap between the hydrophobic layer 124 and the socket surface, and under the action of the pressure difference that the air pressure inside the groove 121 is higher than the external air pressure, external water is difficult to enter the inner side of the groove 121.

The above examples are merely illustrative and not restrictive of the present invention, and those skilled in the art who review this specification can make modifications to the embodiments of the invention as required without any inventive contribution, but fall within the scope of the claims of the invention.

Claims

1. A plug-in type waterproof LED power supply comprises a shell (100), a PCB (400), an electric wire (300) and a plug (200), wherein the PCB (400) is fixedly connected inside the shell (100), the plug (200) and the electric wire (300) are respectively and electrically connected with the PCB (400), the plug type waterproof LED power supply is characterized in that the shell (100) comprises a barrel (110), a front end cover (120) and a rear end cover (130), the front end cover (120) and the rear end cover (130) are respectively and fixedly connected with two ends of the barrel (110), the PCB (400) is positioned inside the barrel (110), and one surfaces, close to the rear end cover (130), of the PCB (400) and the front end cover (120) are fixedly connected; the plug-in type waterproof LED power supply further comprises a blowing device (500), the blowing device (500) is fixedly connected inside the barrel (110), an air inlet (134) is formed in the rear end cover (130), and the air inlet (134) is connected with the air inlet end of the blowing device (500); a groove (121) is formed in one surface, away from the rear end cover (130), of the front end cover (120), the plug (200) is fixedly connected with the front end cover (120), the plug (200) is located on the inner side of the groove (121), the plug (200) extends out of the groove (121), an air outlet (122) is formed in the front end cover (120), the air outlet (122) is communicated with the groove (121), an air outlet end of the air blowing device (500) is communicated with the air outlet (122), and the air blowing device (500) is electrically connected with the PCB (400);

A partition board (123) is fixedly connected to the bottom surface of the groove (121), the partition board (123) is arranged around the plug (200), the air outlet (122) is positioned between the inner side wall of the groove (121) and the outer side wall of the partition board (123), a gap is formed between the outer side wall of the partition board (123) and the inner side wall of the groove (121), the height of the partition board (123) is H1, the depth of the groove (121) is H2, and H2 is greater than H1;

the air blowing device (500) is positioned between the rear end cover (130) and the PCB (400), the PCB (400) is positioned between the air blowing device (500) and the front end cover (120), the rear end cover (130), the air blowing device (500), the PCB (400) and the front end cover (120) are arranged in a straight line, a third air chamber (111) is formed between the air blowing device (500) and the front end cover (120), the PCB (400) is positioned in the third air chamber (111), the air outlet end of the air blowing device (500) is communicated with the third air chamber (111), and the third air chamber (111) is communicated with an air outlet (122);

the rear end cover (130) comprises a first rear cover plate (131) and a second rear cover plate (132), the first rear cover plate (131) is fixedly connected with the edge of the second rear cover plate (132) in a sealing manner, a gap is formed between the first rear cover plate (131) and the second rear cover plate (132) to form a first air chamber (135), the first rear cover plate (131) is fixedly connected with one end, far away from the front end cover (120), of the barrel body (110), the air inlet (134) is located at the bottom end of the second rear cover plate (132), the air inlet (134) is communicated with the first air chamber (135), an air inlet hole (133) is formed in the first rear cover plate (131), the air inlet hole (133) is communicated with the first air chamber (135), and the air inlet hole (133) is higher than the air inlet hole (134), the air inlet hole (133) is communicated with an air inlet end of the air blowing device (500).

2. The plug-in waterproof type LED power supply according to claim 1, wherein the air blowing device (500) comprises a driving device, fan blades (520) and an air duct (531), the driving device is electrically connected with the PCB (400), the fan blades (520) are located in the air duct (531), the driving device is in transmission connection with the fan blades (520), one end of the air duct (531) is communicated with the air inlet hole (133), and the other end of the air duct (531) is communicated with the third air chamber (111).

3. The plug-in waterproof LED power supply according to claim 2, wherein the driving device is an electric motor (510), the electric motor (510) is electrically connected with the PCB (400), an output shaft of the electric motor (510) is fixedly connected with a rotation center of the fan blade (520), and the electric motor (510) is located between the fan blade (520) and the air inlet hole (133).

4. The plug-in waterproof LED power supply according to claim 3, wherein the blower device (500) further comprises a fixing sleeve (530), the fixing sleeve (530) is located inside the barrel (110), one end of the fixing sleeve (530) is fixedly connected with one surface of the first rear cover plate (131) far away from the second rear cover plate (132) in a sealing manner, the air duct (531) is located at one end of the fixing sleeve (530) far away from the first rear cover plate (131), the electric motor (510) is located inside the fixing sleeve (530), and the air inlet hole (133) is located inside the fixing sleeve (530).

5. The plug-in waterproof LED power supply according to claim 4, wherein a gap is formed between the electric motor (510) and the first rear cover plate (131) and a second air chamber (532) is formed.

6. The plug-in waterproof LED power supply according to claim 5, wherein the blower device (500) further comprises a holder (540), the holder (540) is located between an outer wall of the electric motor (510) and an inner wall of the fixing sleeve (530), the holder (540) is respectively fixedly connected with the electric motor (510) and the fixing sleeve (530), an air flow channel (541) is arranged between the holder and the electric motor (510), the air flow channel (541) is respectively communicated with the second air chamber (532) and the air duct (531), and the holder (540) is made of an elastic material.

7. The plug-in waterproof LED power supply according to claim 1, wherein one side of the front end cover (120) far away from the rear end cover (130) is coated with a hydrophobic layer (124), and the hydrophobic layer (124) is positioned outside the groove (121).