WO2021062947A1

WO2021062947A1 - Industrial vacuum cleaner

Info

Publication number: WO2021062947A1
Application number: PCT/CN2019/125145
Authority: WO
Inventors: 张士松; 张骥; 毋宏兵; 钟红风
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2019-09-30
Filing date: 2019-12-13
Publication date: 2021-04-08
Also published as: CN112568785A; WO2021063402A1; CN213665058U; CN112568786A

Abstract

An industrial vacuum cleaner (100), comprising: a dust suction duct (70); an airflow generation device (30) for suctioning air from the dust suction duct (70) so as to generate airflow, the airflow generation device (30) comprising a motor (72) and a fan (74) driven by the motor (72); a primary separation device (80), comprising a dust barrel (34), the dust barrel (34) comprising a side wall (84) and an accommodating cavity (86) formed by the side wall (84), the accommodating cavity (86) being in communication with the dust suction duct (70); a connecting channel (88), comprising an inlet (90) and an outlet (92), the inlet (90) being in communication with the accommodating cavity (86); and a secondary separation device (82), the secondary separation device being in communication with the outlet (92) and the airflow generation device (30). The connecting channel (88) is provided between the primary separation device (80) and the secondary separation device (82) in the industrial vacuum cleaner (100), so that the industrial vacuum cleaner (100) can continuously suction dust with a high suction force, improving the working efficiency.

Description

Industrial vacuum cleaner

This application claims the priority of the Chinese patent application whose application date is September 30, 2019 and the application number is 201910943337.9, the entire content of which is incorporated into this application by reference.

Technical field

The invention relates to an industrial vacuum cleaner.

Background technique

Industrial vacuum cleaners are usually used to collect large areas of dust-generating sites; or directly connected to the dust outlet of dust-producing tools, such as grinders, sanders, slotting machines, etc.; or processing metal, plastic or other concrete or stone, etc. material. These vacuum cleaners usually include a dust collection bucket, a motor and a fan that generate airflow, a separation filter device, a power switch, a power cord with a plug, and so on. The motor and the fan generate a vacuum, and the dust-laden air enters the separation filter device through the suction pipe. Most of the dust can be separated from the airflow and fall into the dust collection bucket; a small part of the dust also follows the airflow into the cylindrical filter, but some will be The filter is blocked again and falls to the dust collection bucket; finally, the airflow flows to the fan, and the clean air is discharged from the outlet of the fan.

During operation, dust particles collect on the outer surface of the filter. Due to the large amount of dust in the workplace, and the high humidity and heaviness of dust like concrete, it is easy to block the filter, thereby restricting air flow and preventing the vacuum cleaner from working normally. Therefore, the surface of the filter must be manually cleaned frequently or replaced with a new filter.

Summary of the invention

The technical problem to be solved by the present invention is to provide an industrial vacuum cleaner that can sustain large suction power and resist clogging.

The technical solution of the present invention to solve the above technical problems is: an industrial vacuum cleaner, the industrial vacuum cleaner comprising: a dust suction duct; an air flow generating device for generating air flow by inhaling air from the dust suction duct, and the air flow generating device includes A motor, a fan driven by the motor; a first-level separation device, including a dust bucket, the dust bucket includes a receiving cavity, the receiving cavity is in communication with the dust suction duct; a connecting channel, including an inlet and an outlet, wherein the The inlet is in communication with the containing cavity; a secondary separation device, the secondary separation device communicates with the outlet and the air flow generating device.

The industrial vacuum cleaner of the present invention is provided with a connecting channel between the primary and secondary separation devices, so that the industrial vacuum cleaner can continuously vacuum with large suction power, and the work efficiency is improved.

Preferably, the inner diameter of the dust bucket ranges from 200 mm to 500 mm.

Preferably, the inner diameter of the dust bucket ranges from 250 mm to 400 mm.

Preferably, the industrial vacuum cleaner has a rated power P, and the ratio of the diameter of the primary separator to the rated power P ranges from 0.133 to 0.625 mm/W.

Preferably, the industrial vacuum cleaner has a rated power P, and the ratio of the diameter of the primary separator to the rated power P ranges from 0.167 to 0.5 mm/W.

Preferably, the secondary separation device is provided with a dust cup for collecting dust, and the ratio of the effective volume of the dust bucket to the effective volume of the dust cup is in the range of 6-12.

Preferably, the secondary separation device is provided with a dust cup for collecting dust, and the ratio of the effective volume of the dust bucket to the effective volume of the dust cup is in the range of 7-11.

Preferably, the secondary separation device is provided with a dust cup for collecting dust, the effective volume of the dust bucket is greater than or equal to 5L; the effective volume of the dust cup is greater than or equal to 0.8L.

Preferably, at least part of at least one of the motor and the secondary separation device extends into the receiving cavity.

Preferably, the industrial vacuum cleaner is further provided with a mounting seat detachably connected to the dust bucket, and the air flow generating device is arranged on the mounting seat.

Preferably, the mounting seat is provided with a accommodating cavity accommodated in the accommodating cavity, and the accommodating cavity at least partially accommodates the motor.

Preferably, the accommodating cavity at least partially accommodates the secondary separation device.

Preferably, the secondary separation device is provided with a dust cup extending into the containing cavity, the dust cup includes a peripheral wall, wherein one end of the peripheral wall is connected to the mounting seat, and the other end of the peripheral wall is provided with There is a sealing cover movably connected with the peripheral wall.

Preferably, the secondary separation device is provided with a dust cup extending into the receiving cavity, a bracket is provided in the dust bucket, the dust cup is connected to the dust bucket through the bracket, and the dust cup The ash pouring port faces the same direction as the ash pouring port of the dust bucket.

Preferably, the two-stage separation device includes a two-stage separator, the two-stage separator includes a separation part, an end cover connected to the separation part, and the separation part includes a plurality of separation bodies. The main body is provided with an inner cavity penetrating the main body, one end of the inner cavity is provided with an ash inlet on the side wall, and the other end of the inner cavity is an ash outlet, wherein the ash inlet and the air inlet Partly connected, the ash outlet is in communication with the dust cup; the end cover is provided with an air outlet pipe partially communicated with the air outlet, and the air outlet pipe is located in the inner cavity.

Preferably, the end cover and the separation part are detachably connected to the secondary separation device, including an air inlet part communicating with the outlet, an air outlet part communicating with the airflow generating device, a communicating air inlet part, and A secondary separator in the air outlet part and a dust cup communicating with the secondary separator.

Preferably, the separation part is provided with an ash inlet cavity, and the ash inlet cavity communicates with the ash inlet and the air inlet part.

Preferably, an air outlet cavity is provided on the end cover, and the air outlet cavity communicates with the air outlet pipe and the air outlet portion.

Preferably, the inlet is not lower than the lower surface of the dust cup.

Preferably, the dust cup is located in the containing cavity.

Preferably, the secondary separation device includes an air inlet part communicating with the outlet, an air outlet part communicating with the airflow generating device, a secondary separator communicating with the air inlet part and the air outlet part, and the two Dust cup connected to the stage separator.

Preferably, the connecting channel is detachably connected with the mounting seat.

Preferably, a through hole is further provided on the mounting seat, and the through hole communicates with the connecting channel and the secondary separation device.

Preferably, the dust cup has a lower bottom surface for collecting dust; the dust bucket has a lower bottom surface for collecting dust, wherein the bottom surface is higher than the bottom surface of the dust bucket.

Preferably, a sealing element is provided between the end cap and the separation part.

Preferably, the dust cup includes a conical outer peripheral surface.

Preferably, the connecting channel passes through the dust cup.

Preferably, the axis of the secondary separator is parallel to the axis of the motor.

Preferably, a three-stage separation device is provided between the two-stage separation device and the air flow generating device.

Description of the drawings

Figure 1 is a three-dimensional schematic diagram of the industrial vacuum cleaner of the present invention.

Fig. 2 is an exploded perspective view of the industrial vacuum cleaner shown in Fig. 1.

Fig. 3 is a perspective view of the mounting base of the industrial vacuum cleaner shown in Fig. 1.

Fig. 4 is another perspective view of the mounting seat shown in Fig. 3.

Fig. 5 is a cross-sectional view of the industrial vacuum cleaner shown in Fig. 1.

Fig. 6 is a three-dimensional exploded view of the secondary separation device of the industrial vacuum cleaner shown in Fig. 1.

Fig. 7 is a further perspective exploded view of the two-stage separation device shown in Fig. 6.

Fig. 8 is a schematic diagram of the installation seat of the industrial vacuum cleaner shown in Fig. 1 removed from the dust bucket, in which part of the dust bucket is removed.

Fig. 9 is a three-dimensional schematic diagram of another structure of the dust cup.

Fig. 10 and Fig. 11 are a three-dimensional schematic diagram and a three-dimensional exploded view of another structure of the dust cup.

Detailed ways

1 and 2, the industrial vacuum cleaner 100 includes an airflow generating device 30, a separating device 32 communicating with the airflow generating device 30, and a dust bucket 34 for collecting dust. The lower part of the dust bucket 34 can be installed on the base 36, and a number of rollers 38 are arranged below the base 36 to enable the vacuum cleaner 100 to be easily moved as required. The upper part of the dust bucket 34 can be provided with a protective cover 40, which can cover the airflow generating device 30 to protect the airflow generating device 30, and can also be provided with a handle 42 to facilitate the movement of the vacuum cleaner 100. The industrial vacuum cleaner 100 of the present application is only a habitual name, and does not limit its use occasions. The industrial vacuum cleaner 100 can be widely used in various occasions such as rooms and workshops to perform cleaning work.

Of course, the main switch 44 of the vacuum cleaner 100 can also be arranged on the protective cover 40. In this embodiment, the industrial vacuum cleaner is provided with a power cord 41 that can be electrically connected to the airflow generating device 30, and an AC power source is used to power the industrial vacuum cleaner. In one embodiment, a DC power supply, such as a battery pack, can also be used for power supply. The protective cover 40 is also provided with a socket 43, which can provide power for other machines. For example, power tools such as grinders and slotting machines can be plugged in, so that when the power tool starts to work, dust can be collected at the same time, which is very convenient.

The upper part of the dust bucket 34 includes an opening 52 covered by a detachable mounting seat 50. Here, the opening 52 is also a dust pouring port. When the dust bucket 34 is full of dust, the opening 52 can be used to clean the dust outward. The mounting base 50 can be fastened to the dust bucket 34 via any conventional means (such as one or more fastening mechanisms 51). The plane where the opening 52 is located can be defined as the opening plane. It can be understood that the dust bucket 34 and the mounting seat 50 can be hermetically mated. The seal fit may be a seal fit achieved through a form fit, that is, a seal is achieved directly through the shape fit of the dust bucket 34 and the mounting seat 50 without a seal. The sealing fit can also be an elastic fit, that is, the dust bucket 34 is provided with a seal between the mounting seats 50, and the seal fit is realized through the deformation of the seal. By providing a sealing element, when the mounting seat 50 is assembled to the dust bucket 34, the sealing performance can be ensured, and the dust collection efficiency can be improved.

The air flow generating device 30 is installed on the mounting seat 50. 2 to 4, the mounting seat 50 includes a seat body 54 and a body 56 extending downward along the seat body 54. The seat body 54 has an upper surface 58 facing away from the dust bucket 34 and an upper surface extending downward along the upper surface. The flange 60 and the upper surface 58 are located behind the lower surface. At least one reinforcing rib 61 is provided on the lower surface to increase the strength and stability of the base 54. The flange 60 is designed to be assembled on the outer surface of the upper part of the dust bucket 34, and the body 56 extends into the dust bucket 34. In one embodiment, the body 56 includes an inner wall 64, a bottom wall 66 connected to the inner wall 64, and a receiving cavity 68. The accommodating cavity 68 can be used for accommodating the air flow generating device 30. The mounting base 50 may be made of a suitable conventional material (for example, plastic or metal).

The dust suction duct 70 is disposed on the mounting base 50. In this embodiment, the dust suction duct 70 is disposed on the upper surface 58 of the mounting base 50, and can be connected to a dust suction hose or nozzle for sucking dust. Here, dust is only a habitual name, which does not mean that the vacuum cleaner can only collect dust. For the sake of simplicity, the dust in this embodiment is any dirt to be cleaned, such as dust generated when sanding the wall, wood chips generated from wood processing, and so on. Of course, the dust suction duct 70 can also be arranged on the dust bucket 34.

The airflow generating device 30 generates suction airflow required for cleaning operations by forming a suction force at the dust suction duct 70 and a discharge force at the exhaust port. With reference to FIGS. 2, 3 and 5, the air flow generating device 30 includes a motor 72 and a fan 74 driven by the motor 72, wherein the motor 72 is rotatably arranged in the motor housing 76 around the motor axis X. The dust bucket 34 extends in the longitudinal direction, and the motor axis X is parallel to the longitudinal extension axis of the dust bucket 34.

The motor housing 76 is detachably fixed on the mounting base 50 and can be removed together with the mounting base 50. In one embodiment, the motor housing 76 may be connected to the bottom wall 66 of the mounting base 50 by fastening elements (such as screws). Of course, the motor housing 76 can also be formed integrally with the mounting base 50. Here, an integral structure can be understood as a material-locked connection, such as by welding, bonding, or integral molding, such as manufacturing by a casting.

The exhaust port 78 is provided on the motor housing 76 and corresponds to the fan 74. The exhaust port 78 may be in the form of a grille, or an exhaust grill communicating with the exhaust port may be installed at the exhaust port.

The air flow generating device 30 is at least partially contained in the containing cavity 68, that is, at least partially extends into the dust bucket 34. Such a design can improve the damping effect and reduce noise. In one embodiment, the motor 72 extends at least partially into the dust bucket 34; in another embodiment, more than half of the length of the motor 72 in the direction of the axis X extends into the dust bucket 34, that is, the motor 72 is on the axis X. More than half of the length in the direction is below the opening plane.

Referring to FIGS. 2 and 5, in the present invention, the separation device 32 is provided with at least two stages of separation devices, including a first stage separation device 80 and a second stage separation device 82. In order to avoid the problem of reduced airflow caused by dust blockage, in one embodiment, the first-stage separation device 80 is not designed with a screen filter. The first-stage separating device 80 includes a first-stage separator. In this embodiment, the dust bucket 34 is used as the first-stage separator. The dust bucket 34 includes a side wall 84, a receiving cavity 86, and a lower bottom surface 109. The side wall 84 and the lower bottom surface form a receiving cavity 86, and the receiving cavity 86 is connected with the dust suction duct 70 to separate dust, and at the same time, it can be used to collect dust.

The shape of the outer surface of the side wall 84 can be varied, and is not limited to a circular or conical shape. The inner surface of the side wall 84 may be cylindrical or conical. The dust suction duct 70 brings the dust-laden airflow into the interior of the first-stage separator in a direction tangential to the side wall 84, so as to establish a vortex inside the first-stage separator. This vortex is directed downwards from the top wall in the dust bucket 34. The swirling effect in the primary separator removes most of the dust entrained in the suction airflow, and promotes the deposition of dust on the bottom surface 109 of the dust bucket 34.

The separation efficiency of the primary separator will affect the performance of the whole machine. Generally, the separation efficiency of the entire vacuum cleaner is about 95%, while the separation efficiency of the first-stage separator is above 65%, or even about 80%. However, if the primary separation efficiency is low, the dust entering the downstream separator (such as the secondary separator) will increase greatly, causing the downstream separator (such as the secondary separator) to be too late to separate, and the dust will be discharged; or blockage will occur, causing The machine is not working properly.

The diameter of the primary separator also affects the separation efficiency. If the diameter is too small, such as less than 200mm, the vortex velocity inside the primary separator is relatively high, instead of using dust to deposit in the dust bucket 34; it will even drive the dust deposited in the dust bucket 34 into the downstream separation The separator reduces the separation efficiency. If the diameter is too large, such as greater than 500mm, the vortex velocity inside the first-stage separator is relatively low, which is not conducive to dust deposition, and the separation efficiency of the first-stage separator is reduced; then the dust content entering the downstream separator increases, then It will cause the downstream separator (such as the secondary separator) to be discharged before separation; or blockage will occur, making the machine unable to work normally and affecting the performance of the whole machine.

In this embodiment, the inner diameter of the dust bucket 34 is in the range of 200 mm to 500 mm, that is, the diameter of the primary separator is in the range of 200 mm to 500 mm; or the circumference of the dust bucket is in the range of 628 mm to 1570 mm. In an alternative embodiment, the inner diameter of the dust bucket 34 ranges from 250 mm to 400 mm, that is, the diameter of the primary separator ranges from 250 mm to 400 mm. The inner diameter of the primary separator can also be 300mm, 350mm, etc.

In order to further improve the separation efficiency, the ratio of the diameter of the primary separator to the rated power P of the vacuum cleaner is preferably selected. If the rated power P of the vacuum cleaner is very high and the diameter of the primary separator is too small, the vortex velocity inside the primary separator will increase relatively, which will not be conducive to the dust deposition in the dust bucket 34; The dust in the dust bucket 34 enters the downstream separator, resulting in low separation efficiency. If the rated power P of the vacuum cleaner is low, and the diameter of the primary separator is larger, the vortex velocity inside the primary separator will be lower, and the dust will not be separated and deposited in the dust bucket 34, and will be carried. Into the downstream separator, it is unfavorable to improve the separation efficiency of the first-stage separator.

For vacuum cleaners, the rated power P is generally between 800W and 1500W. In order to improve the performance of the whole machine, it is better to choose the ratio of the diameter of the primary separator to the rated power P of the vacuum cleaner in the range of 0.133~0.625mm/W. In an alternative embodiment, the ratio of the diameter of the primary separator to the rated power P of the vacuum cleaner ranges from 0.167 to 0.5 mm/W. In an alternative embodiment, the ratio of the diameter of the primary separator to the rated power P of the vacuum cleaner is 0.3 mm/W.

One of the more common use environments of the vacuum cleaner of the present invention is engineering environments such as decoration. Due to the large amount of dust, the dust bucket 34 is used as the primary separator, and the ratio of the primary separator to the rated power P is preferably selected. , So that the separation efficiency is high, and it is not easy to be blocked, and then it can continue to suck the dust with large suction.

In one embodiment, the dust bucket 34 can be made of a transparent or translucent material, and the dust collection in the dust bucket can be directly observed through the side wall 84 without opening the mounting seat 50 to determine whether it needs to be dumped. dust.

Continuing to refer to FIGS. 2 and 5, the secondary separation device 82 is in communication with the primary separation device 80 through the connecting passage 88. The connecting passage 88 has a substantially cylindrical part, and includes an inlet 90 communicating with the receiving cavity 86, an outlet 92 communicating with the secondary separation device 82, and a closed pipe communicating the inlet 90 and the outlet 92. In other words, here, there is no need to provide a sea paw-type easy-clogging filter between the receiving cavity 86 of the dust bucket 34 and the secondary separation device 82. Instead, it is directly connected through the connecting channel 88. This design avoids blockages between the primary and

secondary separation devices

80 and 82, so that the industrial vacuum cleaner can continue to vacuum with high suction. Of course, the inlet 90 can be provided with a grid-type filter that is not easy to be clogged to prevent inhalation of large areas of paper dust and cause clogging.

The bottom wall 66 of the mounting seat 50 is provided with a through hole 94. In one embodiment, the connecting channel 88 is connected to the bottom wall 66 of the mounting seat 50, and the outlet 92 of the connecting channel 88 is in communication with the through hole 94.

In another embodiment, the connecting channel 88 can also pass through the through hole 94 to communicate with the secondary separation device 82; in another embodiment, the air inlet portion of the secondary separation device 82 can also pass through the through hole 94 to connect The outlet 92 of the passage 88 communicates.

The connecting channel 88 can be fixedly or detachably connected to the mounting seat 50 and is located in the receiving cavity 86 of the dust bucket 34. In this embodiment, the connecting passage 88 has an axis that coincides with the longitudinal extension axis of the dust bucket 34. Of course, the connecting passage 88 may also have an axis deviating from the longitudinal axis of the dust bucket, such as a curved axis, so that the position of the inlet 90 can be changed.

While the cylindrical portion of the connecting passage 88 may have a variable size, for example, the cylindrical portion may include a decreasing cross-sectional area.

It can be understood that the connection channel 88, the through hole 94, and the secondary separation device 82 may be in a sealed fit through a form fit, or may be sealed in fit through a sealing element. Furthermore, the sealing effect of the air passage from the receiving cavity 86 to the secondary separation device 82 is ensured.

Continuing to refer to FIG. 5, one end of the connecting channel 88 communicating with the receiving cavity 86 is provided with a hollow support frame 87 protruding outward into the receiving cavity 86, and a floating ball 89 capable of closing the entrance of the channel is provided in the support frame 87. The floating ball 89 is located upstream of the secondary separation device 82 on the flow path of the airflow, that is, the airflow first passes through the position of the floating ball 89 and then flows to the secondary separation device 82 through the connecting channel 88. By setting the float ball 89, when the vacuum cleaner sucks liquid, when the water level reaches a certain height, that is, the position of the float ball 89, the float ball 89 will move upward as the water level rises. When the water level reaches the warning, the float ball 89 will move up. Blocking the inlet 90 of the connecting channel 88 makes the air flow unable to flow normally. At this time, the user can know that the water is full through the change of the air flow; it can also be set electronically. When the floating ball 89 blocks the connecting channel 88, the air flow can be detected The change starts the early warning whistle to remind the user that the water is full. The water full here not only refers to pure liquid water, but also refers to flowing dust such as muddy water containing dust.

Referring to FIG. 6, in this embodiment, the secondary separation device 82 includes an air inlet portion 96 communicating with the outlet 92, an air outlet portion 98 communicating with the air flow generating device 30, and an air inlet portion 96 communicating with the air outlet portion 98. The secondary separator 99 communicates with the secondary separator 99 and a dust cup 102 for accommodating dust.

Referring to FIGS. 6 and 7, the secondary separator 99 includes a separating part 103 and an end cover 104 connected to the separating part. The air inlet part 96 communicates with the separating part 103, and the air outlet part 98 communicates with the end cover 104. In this embodiment, the end cap 104 and the separation part 103 are detachably connected, which facilitates cleaning of the internal structure. A sealing member 106 is provided between the end cap 104 and the separating portion 103, and the sealing member 106 is deformed to achieve a sealed connection. This design is convenient for disassembly and maintenance, and can also provide a good sealed space.

The end cover 104 includes an upper cover 108 and a lower cover 110, wherein the upper cover 108 and the lower cover 110 jointly form an air outlet cavity 112 communicating with the air outlet portion 98. A sealing member 106 is provided between the upper cover 108 and the lower cover 110. The sealing member 106 is deformed to achieve a seal between the two, and the two can be connected together by a fastener.

In this embodiment, the air outlet portion 98 includes a pipe communicating with the air outlet cavity 112; of course, the air outlet portion 98 may also include at least two pipes communicating with the air outlet cavity 112, thereby improving dust collection efficiency.

The separation part 103 includes a plurality of separation bodies 118. Each separation body 118 is provided with an inner cavity 120 passing through the body 118. An ash inlet 122 is opened on the side wall of one end of the inner cavity 120, and the other end of the inner cavity 120 is an ash outlet. The ash inlet 122 is in communication with the air inlet portion 96, and the ash outlet 124 is in communication with the dust cup 102, and the dust separated by the secondary separator 99 is discharged to the dust cup 102 through the ash outlet 124. The end cover 104 is provided with an air outlet pipe 114 communicating with the air outlet, and the air outlet pipe 114 is located in the inner cavity 120.

A plurality of air outlet pipes 114 are located on the bottom wall of the lower cover 110. Each air outlet pipe 114 has a substantially cylindrical shape and protrudes downward from the bottom wall. The air outlet pipe 114 guides the clean air discharged from the secondary separator 99 to the air flow generating device 30 through the air outlet cavity 112.

In this embodiment, the separating body 118 has a conical shape. Of course, the separating body is not limited to a conical shape, and it may be a cylinder. A plurality of tapered separation bodies 118 are arranged around the axis Y of the secondary separator, and can be arranged angularly or symmetrically around the axis Y of the secondary separator. The axis Y of the secondary separator 99 is parallel to the axis X of the motor (as shown in FIG. 5). In a direction parallel to the axis X of the motor, the secondary separator 99 and the motor 72 at least partially overlap. In one embodiment, in a direction parallel to the axis X of the motor, about half of the length of the motor 72 overlaps the secondary separator 99. This design makes the structure more compact. Moreover, the air outlet portion 98 communicating with the airflow generating device 30 is almost flush with the airflow inlet of the airflow generating device 30, which is more conducive to the circulation of airflow.

The separating part 103 is provided with a barrier 126 which separates the end cap 104 and the separating part 103 to form a relatively independent space. The blocking member 126 abuts against the upper surface 125 of the separating portion 103 and the inner diameter of the flange 127 to define an air passage from the air inlet portion 96 to each separating body 118, that is, the ash inlet cavity 128. Then flow from the ash inlet 128 to each ash inlet 122. The blocking member 126 is fixed to the separation part 103 by the fixing plate 111. The barrier 126 is provided with a hole through which the air outlet tube 114 passes, and the hole and the air outlet tube 114 are closely matched to form a relatively sealed space.

The connecting passage 88 introduces part of the cleaned air into the ash chamber 128, and then generally guides it tangentially to the ash inlet 122 of each separation body 118, causing a vortex-type swirling flow or a swirling flow. The dust separated by each separating body 118 is collected into the dust cup 102 through the dust outlet 124. Thus, the dust cup 102 and the dust bucket 34 are completely separated from each other, so that the air flow in one of them does not affect the air flow in the other. This further improves the dust collection efficiency of the vacuum cleaner.

With reference to FIGS. 2, 3 and 6, at least a part of the secondary separation device 82 is installed on the mounting seat 50. It is supported by the mounting base 50 and can be removed together with the mounting base 50, so that the secondary separation device 82 is convenient for cleaning and maintenance. In the illustrated embodiment, the outer surfaces of at least two of the plurality of separate bodies 118 are provided with connecting lugs 130, which are connected to the bottom of the mounting seat 50 through the connecting lugs 130 by fastening elements (such as screws). 66 on the wall. The bottom wall 66 is also provided with a plurality of tapered cavities 132 matched with the separating body 118 for receiving the other end of the separating body 118 provided with the ash outlet 124. A sealing structure is also provided between the separation body 118 and the tapered cavity 132, which improves the sealing effect of the secondary separation device 82.

Similarly, the air inlet portion 96 is also provided with a connecting lug 134, which is connected to the bottom wall 66 of the mounting seat 50 through the connecting lug 134 by a fastening element (such as a screw).

The secondary separation device 82 is at least partially accommodated in the accommodating cavity 68, and is arranged in an arc shape on the side of the air flow generating device 30, and the motor housing 76 can be at least partially accommodated in the arc-shaped opening, so designed, Makes the structure more compact.

At the same time, referring to FIG. 5, the secondary separation device 82 at least partially extends into the dust bucket 34. Such a design can improve the damping effect and reduce noise. In one embodiment, the separation part 103 at least partially extends into the dust bucket 34. In another embodiment, the separation portion 103 extends into the dust bucket 34, that is, the highest point of the separation portion 103 is not higher than the opening plane, and is all located below the opening plane.

Referring to FIG. 8, the dust cup 102 surrounding or surrounding the plurality of separation bodies 118 includes a peripheral wall 136 and a bottom wall 138. The dust cup 102 is also provided with an ash pouring port 142. The dust cup 102 can be installed on the mounting seat 50 or on the dust bucket 34. Depending on the installation location, the location of the pouring port is also different.

In one embodiment, the dust cup 102 is connected to the dust bucket 34. In this way, the ash pouring port 142 is arranged in the same direction as the ash pouring port 52 of the dust bucket 34 and faces the mounting seat 50. Specifically, a bracket 140 is provided in the dust bucket 34. The bracket 140 can extend upward from the bottom surface 109 of the dust bucket 34, and the bottom wall 138 of the dust cup 102 is connected with the bracket 140, so that the dust pouring port 142 of the dust cup 102 and the dust pouring port 52 of the dust bucket 34 are facing the same The direction of the seat body 54 of the mounting seat 50. In this way, after the mounting seat 50 is disassembled, the dust in the dust bucket 34 and the dust cup 102 can be disposed of at the same time, eliminating the trouble of discharging the dust separately.

The dust cup 102 can be made of transparent or translucent materials, so that the dust collection in the dust cup 102 can be directly observed to determine whether it is necessary to dump the dust.

Of course, here, the dust cup 102 and the mounting seat 50 are easy to disassemble and have a good sealing effect. In one embodiment, the outer diameter of the peripheral wall 136 of the dust cup 102 close to the upper end of the mounting seat 50 is adapted to the outer diameter of the bottom wall 66 of the mounting seat 50, and a seal (not shown) can surround the bottom wall of the mounting seat 50. 66 is assembled to form a seal between the bottom wall 66 and the peripheral wall 136. In this way, it is easy to disassemble, and the sealing effect is good.

In this embodiment, the dust cup 102 has a conical outer surface, and the cross section becomes smaller and smaller in the direction away from the mounting seat. The shape of the dust cup 102 is not necessarily limited to a conical shape, it may be a cylinder, or other regular or irregular shapes.

In one embodiment, the connecting channel 88 passes through the dust cup 102 and has a center line that coincides with the axis of the dust cup 102. In another embodiment, the connecting channel 88 can also be directly formed on the dust cup 102. That is, a connecting channel 88 extends upward from the bottom wall 138 of the dust cup 102 to communicate with the receiving cavity 86 and the air inlet portion 96.

In another embodiment, the dust cup 102a has a different shape and installation method. Referring to FIG. 9, the dust cup 102 a surrounding or surrounding the plurality of tapered separation bodies 118 has a shape adapted to the separation portion 103. The outer circumferential surface of the dust cup 102a is provided with a groove 103a for at least partially accommodating the connecting channel 88a, and the entrance 90a of the connecting channel 88a is arranged closer to the mounting seat 50. The dust cup 102a includes a peripheral wall 136a and a sealing cover 160a movably arranged with the peripheral wall 136a. One end of the peripheral wall 136a close to the mounting base 50 is connected to the body 56 of the mounting base 50 by a fastener (screw); the other end of the peripheral wall 136a is an opening to provide an ash pouring port 142a for dumping dust. The sealing cover 160a is movably connected to the peripheral wall 136a to seal the ash pouring port 142a. In one embodiment, one end of the sealing cover 160a is pivotally connected to the peripheral wall 136a, and a locking mechanism 162a is provided between the other end and the peripheral wall 136a, through which the sealing cover 160a can be fixedly connected to the peripheral wall 136a , In turn, the pouring port 142a can be sealed. It can be understood that a sealing structure may be provided between the sealing cover 160a and the peripheral wall 136a to ensure the sealing effect of the dust cup 102a when the sealing cover 160a is not opened.

It is understandable that the locking mechanism 162a can have many forms. In this embodiment, the locking mechanism 162a includes a clamping portion 164a provided on the peripheral wall 136a, a matching portion 166a provided on the sealing cover 160a, wherein the matching portion 166a is provided with a slot 168a, and one end of the clamping portion 164a is provided There is a pressing end 170a for pressing; the other end is provided with a hook 172a matched with the groove 168a. The hook 172a cooperates with the groove 168a, and the sealing cover 160a can be fixedly connected to the peripheral wall 136a to seal the ash pouring opening 142a; if ash needs to be poured, the mounting seat 50 is removed and the pressing end 170a is pressed to make the hook 172a It is disengaged from the card slot 168a, and the sealing cover 160a is rotated to expose the ash pouring port 142a, which facilitates ash pouring.

In another embodiment, referring to FIGS. 10 and 11, the dust cup 102b includes a peripheral wall 136b and a sealing cover 160b movably arranged with the peripheral wall 136a. Similarly, one end of the peripheral wall 136b close to the mounting base 50 is connected to the body 56 of the mounting base 50 by a fastener (screw); the other end of the peripheral wall 136b is an opening to provide an ash pouring port 142b for dumping dust. The sealing cover 160b is movably connected to the other end of the peripheral wall 136b to seal the ash pouring port 142b. In this embodiment, unlike the above-mentioned embodiment, the sealing cover 160b can be removed from the peripheral wall 136b, and a locking mechanism 180b is provided between the sealing cover 160b and the peripheral wall 136b. Through the locking mechanism 180b, the sealing cover 160b can be fixedly connected to the peripheral wall 136b, thereby sealing the ash pouring port 142b.

It is understandable that the locking mechanism 180b can have many forms. In this embodiment, the locking mechanism 180b includes a matching groove 182b provided on the peripheral wall 136b, a protrusion 184b provided on the sealing cover 160b, and the protrusion 184b cooperates with each other. The rotation cooperation of the groove 182b realizes the mutual fixing of the sealing cover 160b and the peripheral wall 136b. When it is necessary to pour ash, turn the sealing cover 160b so that the protrusion 184b and the matching groove 182b are uncoated, and the sealing cover 160b is removed to expose the ash pouring opening 142b, so that the ash can be easily poured.

A sealing structure may be provided between the sealing cover 160b and the peripheral wall 136b to ensure the sealing effect of the dust cup 102b when the sealing cover 160b is not opened.

The difference from the foregoing embodiment is that in this embodiment, the connecting channel 88b can be connected to the sealing cover 160b, and this design can facilitate the maintenance of the connecting channel 88b when the sealing cover 160b is removed. Of course, a sealing structure is provided between the connecting channel 88b and the through hole 94 (not shown) on the bottom wall 66 to ensure the sealing effect.

In the above embodiment, the connecting

channels

88, 88a, 88b and the

dust cup

102, 102a, 102b have different installation positions and installation methods, but preferably, the entrance of the connecting

channels

88, 88a, 88b is not lower than the

dust cup

102 , 102a, 102b bottom surface. Here, the lower surface of the

dust cup

102, 102a, 102b means that the

dust cup

102, 102a, 102b faces the lower bottom surface 109 of the dust bucket 34.

If necessary, a three-stage separator can be installed. Here, it may be referred to as the final stage filter assembly 144, which is used to filter the exhaust air stream containing any pollutants just before it is discharged into the atmosphere. Please continue to refer to FIG. 5, the final stage filter assembly 144 includes a filter element 146 located downstream of the secondary separation device 82 and upstream of the air flow generating device 30. The last-stage filter assembly 144 concentrates the cleaner air flow from the secondary separation device 82 and guides the cleaner air through the filter element 146 to filter any residual fine dust remaining in the discharged airflow, and The clean air flow merges into the air inlet (not shown) of the air flow generating device 30.

In this embodiment, continuing to refer to FIG. 2, the filter element 146 is housed in the filter housing 148, and the filter housing 148 and the motor housing 76 are integrally formed. The filter housing 148 is matched with a detachable cover 150, and the filter element 146 can be supported by the cover 150 and can be removed together with it. The filter element 146 is easy to clean and maintain. Of course, it can also be provided with a movably enclosed cover with the filter housing 148, such as hinged connection, to provide an inlet for cleaning the filter element 146.

The filter element 146 may be one-stage or multi-stage. It may include at least one foam filter. This foam filter can be a composite component of a coarse foam layer and a fine foam layer. If necessary, the two foam layers can be fixed to each other by conventional means. Alternatively or additionally, a pleated filter may be used.

In operation, referring to FIG. 5, the dust-entrained air enters the primary separation device 80 through the suction duct 70 in a tangential direction relative to the side wall of the dust bucket 34. The air then establishes a vortex around the receiving cavity 86, in which many particles and liquids entrained in the air travel along the inner surface of the side wall 84 by centrifugal force and are separated from the rotating airflow by gravity. These particles are concentrated on the bottom surface 109 of the dust bucket 34. However, the relatively light fine dust withstands less centrifugal force. Therefore, the air flow circulating near the bottom of the dust bucket 34 contains fine dust. Therefore, a blocking member extending to the bottom of the dust bucket 34 may be provided in the dust bucket 34, and the circulating airflow hits the blocking member and prevents further rotation, thereby also causing most of the fine dust entrained in the air to fall.

Part of the cleaned air travels through the inlet 90 of the connecting channel 88 and enters the plurality of separation bodies 118 through the ash inlet chamber 128. There, the air swirls or spirally descends along the inner cavities 120 of the several separating bodies 118 to separate the remaining fine dust. At this time, the double cleaned air flows upward through the air outlet pipe 114 and enters the air outlet cavity 112. The fine dust separated in the secondary separator accumulates in the

dust cup

102, 102a, 102b. The clean air flows out of each air outlet pipe 114 and is recombined to the air outlet cavity 112, enters the final stage filter assembly 144 through the air outlet portion 98, passes through the filter assembly 144, and is in fluid communication with the inlet of the air flow generating device 30. The cleaned air is discharged into the atmosphere through the exhaust port on the electric housing 76.

Continuing to refer to FIG. 5, the dust bucket 34 and the dust cup 102 are configured to be relatively sealed structures independently of each other. In this embodiment, in order to empty the dust, the mounting seat 50 is removed from the dust bucket 34, and the dust bucket 34 and the dust cup 102 can be tilted at the same time to empty the dirt therein. Or, remove the mounting seat 50 from the dust bucket 34, pour the dirt in the

dust cups

102a, 102b into the dust bucket 34, and then dump the dust bucket 34 to empty the dirt. Or, remove the mounting seat 50 from the dust bucket 34, and dump the dirt in the dust bucket 34 and the

dust cups

102a, 102b, respectively.

Most of the debris or dust will be separated in the primary separation device 80 and collected in the dust bucket 34. Therefore, the effective volume required by the dust bucket 34 is relatively large, and the effective volume required by the dust cups 102, 102a, and 102b is relatively small. In order to make the dust bucket 34 and the dust cup 102 almost full at the same time, that is, the dust bucket 34 and the

dust cup

102, 102a, 102b are emptied at the same frequency, thereby reducing the number of times of ash dumping of the industrial vacuum cleaner. In one embodiment, the ratio of the effective volume of the dust bucket 34 to the effective volume of the dust cup 102 is in the range of 6-12. In an alternative embodiment, the ratio of the effective volume of the dust bucket 34 to the effective volume of the dust cup 102 ranges from 7 to 11. In an alternative embodiment, the ratio of the effective volume of the dust bucket 34 to the effective volume of the dust cup 102 can also be 8; 9, or 10, etc.

Here, the effective volume designates the maximum ash volume of the dust bucket 34 or the dust cup 102 under the normal working state of the vacuum cleaner. And if the vacuum cleaner is blocked due to a large amount of dust or stops working because it is too late to filter and spray dust, it is an abnormal working state.

In one embodiment, referring to FIG. 5, the dust cup 102 is located in the receiving cavity 86 of the dust bucket 34, but in order to increase the effective volume of the dust bucket, the lower bottom surface 101 of the dust cup 102 is higher than the bottom bottom surface 109 of the dust bucket 34 . Such a design can increase the effective volume of the dust bucket 34 and reduce the overall height of the industrial vacuum cleaner. Here, for the convenience of description, the lower bottom surface 101 of the dust cup 102 can be idealized as the bottom wall 138 as the plane where the thickness is extremely small and the bottom wall 138 is located. Of course, it can also be defined that the inner surface of the bottom wall 138 of the dust cup 102 for receiving dust is the lower bottom surface. In other embodiments, the sealing

cover

160a, 160b can also be idealized as having an extremely small thickness, and the plane where the sealing

cover

160a, 160b is located is the bottom surface of the

dust cup

102a, 102b or the inner surface of the sealing

cover

160a, 160b It is the bottom surface of the

dust cup

102a, 102b.

In one embodiment, the distance L between the lower bottom surface 101 of the dust cup 102 and the lower bottom surface 109 of the dust bucket 34 is about 50 mm to 450 mm. The distance L between the lower bottom surface 101 of the dust cup 102 and the lower bottom surface 109 of the dust bucket 34 may also be 100 mm to 400 mm. The distance L between the lower bottom surface 101 of the dust cup 102 and the lower bottom surface 109 of the dust bucket 34 may also be 150 mm to 350 mm.

And because of the different occasions, the ash production is also different. For example, the ash output of the wall polished by a grinder is about 4L to 5L in a day. Therefore, the effective volume of the dust bucket 34 can be set to be greater than or equal to 5L, can be 6L or 8L, etc.; the effective volume of the dust cup 102 can be set to be greater than or equal to 0.8L, or greater than or equal to 1L, such as 12.L and so on. In this way, for users, they only need to clean the vacuum cleaner once a day after work, which is very convenient to use.

Those skilled in the art can imagine that the present invention can also have other implementations, but as long as the technical essence adopted is the same or similar to the present invention, or any changes and substitutions made based on the present invention are included in the present invention. Within the scope of protection.

Claims

An industrial vacuum cleaner, characterized in that: the industrial vacuum cleaner includes:

Suction duct

An air flow generating device for drawing in air from the dust suction duct to generate air flow, the air flow generating device including a motor and a fan driven by the motor;

The first-stage separation device includes a dust bucket, the dust bucket includes a receiving cavity, and the receiving cavity is in communication with the dust suction duct;

The connecting channel includes an inlet and an outlet, wherein the inlet is in communication with the receiving cavity;

The secondary separation device communicates with the outlet and the air flow generating device.
The industrial vacuum cleaner of claim 1, wherein the inner diameter of the dust bucket ranges from 200 mm to 500 mm.
The industrial vacuum cleaner of claim 1, wherein the inner diameter of the dust bucket ranges from 250 mm to 400 mm.
The industrial vacuum cleaner of claim 1, wherein the industrial vacuum cleaner has a rated power P, and the ratio of the diameter of the primary separator to the rated power P ranges from 0.133 to 0.625 mm/W.
The industrial vacuum cleaner according to claim 1, wherein the industrial vacuum cleaner has a rated power P, and the ratio of the diameter of the primary separator to the rated power P ranges from 0.167 to 0.5 mm/W.
The industrial vacuum cleaner according to claim 1, wherein the secondary separation device is provided with a dust cup for collecting dust, and the effective volume of the dust bucket and the effective volume of the dust cup are in a range of 6 ~12.
The industrial vacuum cleaner according to claim 1, wherein the secondary separation device is provided with a dust cup for collecting dust, and the ratio of the effective volume of the dust bucket to the effective volume of the dust cup is in the range of 7. ~11.
The industrial vacuum cleaner according to claim 1, wherein the secondary separation device is provided with a dust cup for collecting dust, the effective volume of the dust bucket is greater than or equal to 5L; the effective volume of the dust cup is greater than or equal to 0.8 L.
The industrial vacuum cleaner according to claim 1, wherein at least one of the motor and the secondary separation device at least partially extends into the receiving cavity.
The industrial vacuum cleaner according to claim 1, wherein the industrial vacuum cleaner is further provided with a mounting seat detachably connected to the dust bucket, and the air flow generating device is arranged on the mounting seat.
The industrial vacuum cleaner according to claim 10, wherein the mounting seat is provided with a containing cavity contained in the containing cavity, and the containing cavity at least partially contains the motor.
The industrial vacuum cleaner according to claim 11, wherein the accommodating cavity at least partially accommodates the secondary separation device.
The industrial vacuum cleaner of claim 10, wherein the secondary separation device is provided with a dust cup extending into the containing cavity, the dust cup includes a peripheral wall, and one end of the peripheral wall is connected to the On the mounting seat, the other end of the peripheral wall is provided with a sealing cover movably connected with the peripheral wall.
The industrial vacuum cleaner according to claim 10, characterized in that: the secondary separating device is provided with a dust cup extending into the containing cavity, a bracket is provided in the dust bucket, and the dust cup is connected to the dust cup through the bracket. The dust bucket is connected, and the ash pouring port of the dust cup is in the same direction as the ash pouring port of the dust bucket.
The industrial vacuum cleaner according to claim 1, wherein the two-stage separation device comprises a two-stage separator, the two-stage separator comprises a separation part, an end cover connected to the separation part, and the separation part It includes a plurality of separate bodies, each of which is provided with an inner cavity penetrating the body, one end of the inner cavity is provided with an ash inlet, and the other end of the inner cavity is an ash outlet, The ash inlet is partially connected with the air inlet, and the ash outlet is communicated with the dust cup; the end cover is provided with an air outlet pipe connected with the air outlet portion, and the air outlet pipe Located in the inner cavity.
The industrial vacuum cleaner according to claim 15, wherein the end cover and the separation part are detachably connected.