CN113294382A

CN113294382A - Waterproof blower

Info

Publication number: CN113294382A
Application number: CN202110743544.7A
Authority: CN
Inventors: 高飞
Original assignee: Dongguan Bosen Precision Impeller Technology Co ltd
Current assignee: Dongguan Bosen Precision Impeller Technology Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-08-24

Abstract

The invention discloses a waterproof blower which comprises a volute, an impeller and a motor, wherein the volute is of a hollow structure, a boss is convexly arranged on the inner wall of the volute, a mounting hole is penetratingly formed in the boss, and at least two layers of first sealing structures are arranged on the boss around the mounting hole; the bottom surface of the impeller is provided with a second sealing structure matched with the first sealing structure, and the impeller is arranged on the boss and enables the second sealing structure to be abutted against the first sealing structure in a sealing manner; the motor is installed in the mounting hole and its output shaft is connected in the impeller. According to the invention, the multilayer sealing structure is arranged between the bottom surface of the impeller and the boss, so that water vapor, water drops, fog water and the like are effectively prevented from permeating into the mounting hole through the matching surface between the bottom surface of the impeller and the boss and entering the motor and the control circuit board, and a good waterproof effect is achieved.

Description

Waterproof blower

Technical Field

The invention relates to the technical field of air blowers, in particular to a waterproof air blower suitable for a sweeping robot.

Background

The air-blower is widely applied to people's daily life, and traditional air-blower often matches uses such as outdoor air model, arched door, trampoline, rainbow door, castle, nevertheless along with the progress of science and technology, the air-blower has also been used in more extensive occasion or equipment, for example an air-blower that is used for sweeping the inside fan of breathing in of robot. When the sweeping robot is used, if water exists on the ground, the water on the ground can be sucked into the blower, so that the electronic components of the blower are short-circuited and aged, and the use and safety of the blower and the sweeping robot are affected.

The blower applied to the floor sweeping robot generally comprises a volute, a motor, an impeller, an air inlet and an air outlet, wherein a mounting hole for mounting the motor is formed in the volute, the motor is mounted in the mounting hole, an output shaft of the motor extends into the volute and is connected with the impeller, when the motor drives the impeller to rotate, air enters the blower from the air inlet, and the air is blown out from the air outlet under the action of the impeller. However, in the existing blower, firstly, the sealing performance of the connecting gap of the volute is not strong enough, and rainwater, water vapor, water molecules and the like easily permeate into the volute through the gap; secondly, the output shaft of the motor and the connecting hole of the impeller are not provided with a waterproof structure, and the bottom of the impeller is of a plane structure, so that water vapor, water drops, fog and the like in the blower gradually seep into the motor and the control circuit board thereof through the connecting hole of the impeller and the mounting hole of the volute in sequence, the motor is burnt out, and electronic parts are short-circuited and aged.

Therefore, it is necessary to provide a waterproof blower having a simple structure and excellent waterproof performance to solve the above problems.

Disclosure of Invention

The invention aims to provide a waterproof blower which is simple in structure and has good waterproof performance.

In order to achieve the purpose, the technical scheme of the invention is as follows: the waterproof blower comprises a volute, an impeller and a motor, wherein the volute is of a hollow structure, a boss is convexly arranged on the inner wall of the volute, a mounting hole is formed in the boss in a penetrating mode, and at least two layers of first sealing structures are arranged on the boss around the mounting hole; the bottom surface of the impeller is provided with a second sealing structure matched with the first sealing structure, and the impeller is arranged on the boss and enables the second sealing structure to be abutted against the first sealing structure in a sealing manner; the motor is installed in the mounting hole and the output shaft of the motor is connected to the impeller.

Preferably, the first sealing structure is at least one first annular protrusion convexly arranged on the boss and at least one first annular groove concavely arranged on the boss; the second sealing structure comprises a second annular groove corresponding to the first annular bulge and a second annular bulge corresponding to the first annular groove, after the impeller is installed, the second annular groove is clamped outside the first annular bulge in a sealing mode, and the second annular bulge is clamped in the first annular groove in a sealing mode. In the invention, a multilayer waterproof structure is arranged between the boss and the bottom surface of the impeller around the mounting hole, thereby effectively preventing water vapor, water drops, fog and the like from entering the motor and control parts thereof.

Preferably, one of the first annular protrusions is protruded at an edge of the mounting hole, and one of the first annular grooves is recessed at an edge of the boss.

Preferably, the boss and the side wall of the volute are spaced to form a negative pressure air duct, the side wall of the first annular groove at the edge of the boss is provided with a plurality of water outlets communicated with the negative pressure air duct, and the impeller rotating at a high speed in the negative pressure air duct generates high negative pressure in the external negative pressure air duct, so that even if water drops and water vapor enter the first annular groove, the water drops and the water vapor are adsorbed by the outer ring under the high negative pressure and are discharged from the water outlets, and a better waterproof effect is achieved.

Preferably, the volute comprises a first shell and a second shell which are detachably connected, and a third sealing structure and a fourth sealing structure which are matched with each other are arranged at the connecting position of the first shell and the second shell.

Preferably, the third sealing structure and the fourth sealing structure are a sealing groove and a sealing pressing block which are matched with each other, the sealing groove is arranged at the edge of one of the first shell and the second shell, the sealing pressing block is convexly arranged at the edge of the other one of the first shell and the second shell, and after the first shell and the second shell are connected, the sealing pressing block is accommodated in the sealing groove and tightly connected with the sealing groove. The edge of one of the first shell and the second shell is changed from the existing single straight-opening buckling position to the double straight-opening buckling position to form the sealing groove, and the edge of the other shell is convexly provided with the corresponding sealing pressing block, so that the problem of water leakage at the joint gap of the first shell and the second shell is solved, and the waterproof effect is improved.

Preferably, the waterproof blower further comprises a sealing ring accommodated in the sealing groove, the sealing pressing block is accommodated in the sealing groove and extrudes the sealing ring, and the waterproof effect can be further improved by the arrangement of the sealing ring.

Preferably, a buckle and a clamping block which are matched with each other are arranged between the first shell and the second shell, and the clamping block is detachably clamped on the buckle.

Preferably, the volute is further provided with an air inlet opposite to the mounting hole, and the volute is further provided with an air outlet communicated with the inside of the volute.

Preferably, the waterproof blower further comprises a control circuit board, the control circuit board is provided with a plurality of fixing holes and a plurality of positioning holes, fixing columns corresponding to the fixing holes and positioning columns corresponding to the positioning holes are convexly arranged on the outer side of the volute casing, where the mounting holes are formed, the control circuit board is connected to one end of the motor, which is far away from the output shaft of the motor, the positioning holes penetrate through the positioning columns, and the fixing holes are connected to the fixing columns.

Compared with the prior art, the waterproof blower is characterized in that at least two layers of first sealing structures are arranged on the boss for mounting the impeller around the mounting hole, and the bottom surface of the impeller is provided with the second sealing structure matched with the first sealing structures.

Drawings

Fig. 1 is a schematic view of the construction of a waterproof blower of the present invention.

Fig. 2 is a schematic view of the structure of fig. 1 from another angle.

Fig. 3 is an exploded view of fig. 1.

Fig. 4 is a schematic view of the first housing of fig. 3 at another angle.

Fig. 5 is a schematic view of the second housing of fig. 3 at another angle.

Fig. 6 is a schematic view of a further angle of the second housing of fig. 5.

Fig. 7 is a cross-sectional view of fig. 5.

Fig. 8 is a schematic view of the impeller of fig. 3 at another angle.

Fig. 9 is a cross-sectional view of fig. 8.

Fig. 10 is a cross-sectional view of fig. 1.

Detailed Description

Embodiments of the present invention will now be described with reference to the drawings, wherein like element numerals represent like elements. And the directional descriptions referred to in the present invention, such as the directional descriptions or the positional relations indicated above, below, left, right, front, back, etc., are all based on the directional descriptions or the positional relations shown in the drawings, which are only for convenience of describing the technical solutions or/and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present application; furthermore, the descriptions of first, second, etc. are only used for distinguishing technical features, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

As shown in fig. 1 to 10, the waterproof blower 1 provided by the present invention is mainly suitable for a sweeping robot, but is not limited thereto, and may also be applied to other devices or other occasions.

With continued reference to fig. 1-10, the waterproof blower 1 of the present invention includes a volute 100, an impeller 200, a motor 300, and a control circuit board 400. The volute 100 comprises a first casing 110 and a second casing 120 which are detachably connected, the first casing 110 and the second casing 120 are connected and then enclose a containing cavity 130, the first casing 110 and the second casing 120 are respectively provided with an air inlet 111 and a mounting hole 121 which are opposite to each other in a penetrating manner, a motor 300 is mounted in the mounting hole 121, an output shaft 310 of the motor 300 extends into the containing cavity 130, an impeller 200 is mounted in the containing cavity 130 and connected to the output shaft 310 of the motor 300, and a control circuit board 400 is mounted on the outer side of the volute 100 and connected to one end, far away from the output shaft 310, of the motor 300.

In the present invention, a boss 122 is convexly disposed on an inner wall of one of the first casing 110 and the second casing 120, in which the mounting hole 121 is opened, the mounting hole 121 penetrates through the boss 122, and at least two layers of first sealing structures 123 are disposed on the boss 122 around the mounting hole 121. Moreover, the impeller 200 is provided with a connection hole 220 penetrating through the bottom surface 210 thereof, the bottom surface 210 of the impeller 200 is further provided with a second sealing structure 230 matched with the first sealing structure 123, and after the impeller 200 is mounted on the boss 122, the second sealing structure 230 is in sealing contact with the first sealing structure 123, so that the bottom surface 210 of the impeller 200 and the boss 122 are in sealing connection and have a multi-layer sealing structure, thereby preventing water vapor and the like from permeating into the motor 300 and the control circuit board 400 through the mounting hole 121.

With continued reference to fig. 5-10, in an embodiment of the present invention, the first sealing structure 123 is at least one first annular protrusion 1231 protruding from the boss 122 and at least one first annular groove 1232 recessed from the boss 122, and the first annular protrusion 1231 is protruding from the edge of the mounting hole 121, and the first annular groove 1232 is recessed from the edge of the boss 122. Correspondingly, the second sealing structure 230 is a second annular groove 231 corresponding to the first annular protrusion 1231 and a second annular protrusion 232 corresponding to the first annular groove 1232. When the impeller 200 is mounted on the boss 122, the bottom surface 210 of the impeller 200 abuts against the boss 122, and the second annular groove 231 thereon is sealingly engaged with the outside of the first annular protrusion 1231 on the boss 122, while the second annular protrusion 232 thereon is sealingly engaged with the inside of the first annular groove 1232. In this embodiment, a plurality of layers of annular grooves and annular protrusions are disposed around the mounting hole 121 between the boss 122 and the bottom surface 210 of the impeller 200, so that a plurality of layers of seals are formed between the bottom surface 210 of the impeller 200 and the boss 122, and multiple blocking of water vapor, water drops, fog and the like permeating between the bottom surface 210 of the impeller 200 and the boss 122 can be performed, thereby effectively preventing the water vapor, water drops, fog and the like from permeating into the motor 300 and the control circuit board 400 through the mounting hole 121.

Referring to fig. 1 to 6, in an embodiment of the present invention, the air inlet 111 is formed on the first housing 110, and the mounting hole 121 is formed on the second housing 120. More specifically, the second housing 120 has a bottom plate 120a and a side wall 120b connected to the periphery of the bottom plate 120a, the inner wall of the bottom plate 120a is protruded with the boss 122, and the boss 122 and the side wall 120b are spaced apart to form a negative pressure air duct 124, as shown in fig. 5 and 7, the negative pressure air duct 124 communicates with the air inlet 111 and the air outlet 140c (described in detail later). The first housing 110 also has a bottom plate 110a and a sidewall 110b connected to the bottom plate 110a, and the air inlet 111 is opened on the bottom plate 110 a.

In this embodiment, the first sealing structure 123 has two layers, specifically, a first annular protrusion 1231 and a first annular groove 1232, the first annular protrusion 1231 is protruded at the edge of the mounting hole 121 (see fig. 5 and 7) to effectively block the water vapor and the like permeating through the mounting hole 121, and the first annular groove 1232 is recessed at the edge of the boss 122 (see fig. 5 and 7) to store the water vapor and the like permeating through the space between the boss 122 and the bottom surface 210 of the impeller 200, so as to prevent the water vapor and the like from further permeating through the mounting hole 121.

Referring to fig. 8-9, correspondingly, the second sealing structure 230 is a second annular groove 231 and a second annular protrusion 232, the second annular groove 231 is recessed in the bottom surface 210 of the impeller 200 around the connecting hole 220, the width, depth, etc. of the second annular groove 231 are matched with the first annular protrusion 1231, the second annular protrusion 232 is protruded at the edge of the bottom surface 210 of the impeller 200, the second annular protrusion 232 is spaced from the edge of the impeller 200 by a small distance, and the width, depth, etc. of the second annular protrusion 232 are matched with the first annular groove 1232.

With reference to fig. 3 and 5, in a more preferred embodiment of the present invention, a plurality of water outlets 1233 are formed at intervals on the sidewall of the first annular groove 1232, each water outlet 1233 is communicated with the first annular groove 1232 and the negative pressure air duct 124, when the impeller 200 rotates at a high speed, a high negative pressure is generated in the negative pressure air duct 124 outside the boss 122, so that water droplets, vapor, and the like entering the first annular groove 1232 are adsorbed by the outer ring at a high negative pressure and are discharged from the water outlet 1233 into the negative pressure air duct 124, thereby preventing the vapor and the like from further permeating toward the mounting hole 121, and achieving a better waterproof effect.

Referring again to fig. 4-5, 7 and 10, in a more preferred embodiment of the present invention, a third sealing structure and a fourth sealing structure are further disposed at the connection position of the first housing 110 and the second housing 120. More specifically, the third and fourth sealing structures are a sealing groove 125 and a sealing pressing block 112 that are matched with each other, wherein the sealing groove 125 is formed at an edge of one of the first and

second housings

110 and 120, the sealing pressing block 112 is protruded at an edge of the other one of the first and

second housings

110 and 120, and after the first and

second housings

110 and 120 are connected, the sealing pressing block 112 is accommodated in the sealing groove 125 to form a tight connection.

In one embodiment of the present invention, the sealing groove 125 is recessed downward from the top surface of the sidewall 120b of the second housing 120, the sealing groove 125 is disposed around the entire edge of the second housing 120, and the cross section of the sealing groove 125 is substantially U-shaped, as shown in fig. 5 and 7. Correspondingly, the outer surface of the sidewall 110b of the first casing 110 is convexly provided with the sealing pressing block 112, the sealing pressing block 112 is arranged around the entire edge of the first casing 110 and corresponds to the sealing groove 125, as shown in fig. 4 and 10, the sealing pressing block 112 and the top surface of the sidewall 110b of the first casing 110 are stepped (see fig. 4), so that the top surface of the sidewall 110b of the first casing 110 forms an abutting surface. After the first housing 110 and the second housing 120 are abutted, the sealing pressing block 112 is clamped in the sealing groove 125, and at this time, an abutting surface formed by the top surface of the sidewall 110b of the first housing 110 abuts against the top surface of the sidewall 120b of the second housing 120, as shown in fig. 10, so that the sealing effect is achieved. The edge of the second shell 120 is changed from the existing single straight-mouth buckling position to the double straight-mouth buckling position, that is, the sealing groove 125 is arranged, and the edge of the first shell 110 is convexly provided with the corresponding sealing pressing block 112, so that the problem of water leakage at the connecting gap between the first shell 110 and the second shell 120 is solved, and the waterproof effect is further improved.

With reference to fig. 10, a waterproof sealing ring 1251 is further disposed in the sealing groove 125, the sealing pressing block 112 is accommodated in the sealing groove 125 and then presses the sealing ring 1251, and the sealing ring 1251 is further disposed to increase the waterproof effect.

With reference to fig. 1-7 and 10, a buckle 126 and a latch 113 are disposed between the first housing 110 and the second housing 120, and the first housing 110 and the second housing 120 are detachably connected by detachably engaging the latch 113 with the buckle 126. In one embodiment of the present invention, a plurality of fasteners 126 are protruded at intervals on the outer surface of the sidewall 120b of the second housing 120, and each of the fasteners 126 is specifically composed of an engaging piece protruded on the sidewall 120b and an engaging hole 1261 opened thereon. Correspondingly, the outer surface of the sidewall 120b of the first housing 110 is protruded from the latch 113 corresponding to the engaging hole 1261, and each latch 113 is detachably engaged with the engaging hole 1261 to achieve detachable connection.

As shown in fig. 2, 6-7 and 10, a mounting cavity is formed on the outer side of the second housing 120, and the mounting cavity is used for mounting the control circuit board 400. More specifically, a plurality of fixing posts 127 and a plurality of positioning posts 128 (see fig. 6) are protruded from an outer side of the bottom plate 120a of the second housing 120, the plurality of fixing posts 127 are uniformly disposed around the mounting hole 121, each fixing post 127 is provided with a first fixing hole 1271, and each positioning post 128 is correspondingly disposed beside one fixing post 127.

Correspondingly, the control circuit board 400 is provided with a plurality of positioning holes 410 and a plurality of second fixing holes 420, as shown in fig. 2-3, each positioning hole 410 corresponds to a positioning post 128, and each second fixing hole 420 corresponds to a fixing post 127. When the control circuit board 400 is installed in the installation cavity, the positioning hole 410 is disposed through the positioning post 128, and the second fixing hole 420 corresponds to the first fixing hole 1271 of the fixing post 127, and then is connected by a fixing member, and the control circuit board 400 is connected to an end of the motor 300 away from the output shaft 310 thereof.

In the present invention, the structures of the other parts of the first casing 110 and the second casing 120 are conventional in the art and will not be described in detail.

Referring to fig. 1-6 again, in the waterproof blower 1 of the present invention, the volute casing 100 is further provided with a protruding air outlet pipe 140 communicating with the interior thereof, the axial direction of the air outlet pipe 140 is staggered with the axial direction of the air inlet 111 and the mounting hole 121, in an embodiment, the air outlet pipe 140 is arranged along the tangential direction of the volute casing 100, and the air outlet pipe 140 is provided with an air outlet 140 c. More specifically, the air outlet pipe 140 includes a first pipe 140a protruding from the first casing 110 and a second pipe 140b protruding from the second casing 120, the second pipe 140b is connected to the negative pressure air duct 124, and when the first casing 110 and the second casing 120 are butted, an air outlet 140c is formed between the first pipe 140a and the second pipe 140 b.

In summary, in the waterproof blower 1 of the present invention, at least two layers of the first sealing structures 123 are disposed around the mounting hole 121 on the boss 122 for mounting the impeller 200, and then the second sealing structure 230 matched with the first sealing structure 123 is disposed on the bottom surface of the impeller 200, so that after the impeller 200 is mounted on the boss 122, the second sealing structure 230 is in sealing contact with the first sealing structure 123, thereby forming a multi-layer seal around the mounting hole 121, and preventing water vapor, water droplets, fog and the like from penetrating into the mounting hole 121 through the matching surface between the bottom surface of the impeller 200 and the boss 122, so as to achieve the purpose of preventing water vapor, water droplets, fog and the like from penetrating into the motor 300 and the control circuit board 400 through the mounting hole 121, and the waterproof blower has a good waterproof effect, and is simple in waterproof structure, and easy to mold the volute 100 and the impeller 200.

The construction of the other parts of the watertight blower 1 to which the present invention relates are of conventional design well known to those skilled in the art and will not be described in detail here.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. The utility model provides a waterproof air-blower, includes spiral case, impeller and motor, its characterized in that:

the volute is of a hollow structure, a boss is convexly arranged on one inner wall of the volute, a mounting hole is formed in the boss in a penetrating mode, and at least two layers of first sealing structures are arranged on the boss around the mounting hole;

the bottom surface of the impeller is provided with a second sealing structure matched with the first sealing structure, and the impeller is arranged on the boss and enables the second sealing structure to be abutted against the first sealing structure in a sealing manner;

the motor is installed in the mounting hole and the output shaft of the motor is connected to the impeller.

2. The waterproof blower of claim 1 wherein: the first sealing structure is at least one first annular bulge convexly arranged on the boss and at least one first annular groove concavely arranged on the boss; the second sealing structure comprises a second annular groove corresponding to the first annular bulge and a second annular bulge corresponding to the first annular groove, after the impeller is installed, the second annular groove is clamped outside the first annular bulge in a sealing mode, and the second annular bulge is clamped in the first annular groove in a sealing mode.

3. The waterproof blower of claim 2 wherein: one of the first annular bulges is convexly arranged at the edge of the mounting hole, and the other first annular groove is concavely arranged at the edge of the boss.

4. The waterproof blower of claim 3 wherein: the boss and the side wall of the volute are spaced at intervals to form a negative pressure air channel, and a plurality of water outlets communicated with the negative pressure air channel are formed in the side wall of the first annular groove at the edge of the boss.

5. The waterproof blower of claim 1 wherein: the volute comprises a first shell and a second shell which are detachably connected, and a third sealing structure and a fourth sealing structure which are matched with each other are arranged at the connecting position of the first shell and the second shell.

6. The waterproof blower of claim 5 wherein: the third sealing structure and the fourth sealing structure are a sealing groove and a sealing pressing block which are matched, the sealing groove is arranged at the edge of one of the first shell and the second shell, the sealing pressing block is convexly arranged at the edge of the other one of the first shell and the second shell, and after the first shell and the second shell are connected, the sealing pressing block is accommodated in the sealing groove and is tightly connected with the sealing groove.

7. The waterproof blower of claim 6 wherein: the sealing device also comprises a sealing ring accommodated in the sealing groove, and the sealing pressing block is accommodated in the sealing groove and extrudes the sealing ring.

8. The waterproof blower of claim 5 wherein: the clamping device comprises a first shell, a second shell and a clamping block, wherein a buckle and a clamping block which are matched with each other are arranged between the first shell and the second shell, and the clamping block is detachably clamped on the buckle.

9. The waterproof blower of claim 1 wherein: the volute is further provided with an air inlet opposite to the mounting hole, and the volute is further provided with an air outlet communicated with the inside of the volute.

10. The waterproof blower of claim 1 wherein: the spiral case is characterized by further comprising a control circuit board, wherein a plurality of fixing holes and a plurality of positioning holes are formed in the control circuit board, fixing columns corresponding to the fixing holes and positioning columns corresponding to the positioning holes are convexly arranged on the outer side, provided with the mounting holes, of the spiral case, the control circuit board is connected to one end, far away from an output shaft of the motor, the positioning holes penetrate through the positioning columns, and the fixing holes are connected to the fixing columns.