CN105996891A - Main machine of dust collector and dust collector - Google Patents

Abstract

The invention provides a main engine of a vacuum cleaner and the vacuum cleaner, wherein the main engine includes: a dust cup, a filter cover, a filter element, a bottom air duct and a motor assembly; the filter cover is arranged in the dust cup, and the filter cover is provided with an opening at the upper end The separation tank, the side wall of the separation tank is provided with an air inlet channel connected with the air inlet of the main engine; one end of the filter element is connected with the outlet of the dust cup, and the other end passes through the filter cover and is located in the separation tank; inside the motor assembly A motor air duct is provided, and the bottom air duct communicates with the dust cup and the motor air duct respectively. In the main unit of the vacuum cleaner provided by the present invention, after the dust with dust and sundries enters the filter cover, the dust and sundries are thrown into the dust cup by centrifugal force, and the air passes through the secondary filtration of the filter element, and the air enters the bottom air duct and is filtered The matching structure of the cover and the dust cup is simple, and the volume is small. In addition, the air duct system is mainly located at the lower part of the host, which saves the volume of the upper part of the host and can reduce the volume of the host.

Description

The host of the vacuum cleaner and the vacuum cleaner

technical field

The invention relates to the field of household electrical appliances, in particular to a main unit of a vacuum cleaner and a vacuum cleaner with the main unit.

Background technique

At present, with the continuous development of the vacuum cleaner industry, people's requirements for vacuum cleaners are getting higher and higher, requiring high suction, low noise, and at the same time small and light; especially the category of horizontal dust cup machines, in order to reduce secondary pollution, The separation efficiency is continuously improved, and the structure of the dust cup is correspondingly more and more complex. The size of the dust cup is larger, but the effective dust collection capacity is smaller. The size of the whole machine is larger, but the suction is weaker, and the noise is not satisfactory; Ground, the air duct structure in the related art is a side air inlet duct structure, which requires a long air duct to connect the outside world and the air inlet of the dust cup. The cup wall rotates, some of the larger particles of dust are settled in the primary cyclone chamber, and some of them enter the secondary cyclone separation chamber through the small hole filter, and settle in the secondary dust collection chamber from the dust removal port under the action of centrifugal force. The secondary filtered air flow is filtered again by the filter cotton through the air riser, and the clean air flow enters the motor room from the side wall of the upper cover of the dust cup, and then returns to the outside air after being filtered through the air outlet.

Contents of the invention

In order to solve at least one of the above technical problems, an object of the present invention is to provide a main engine of a vacuum cleaner.

Another object of the present invention is to provide a vacuum cleaner with the above-mentioned main unit.

In view of this, the embodiment of the first aspect of the present invention provides a main body of a vacuum cleaner, including: a dust cup, the dust cup has a dust collection chamber; a filter cover, the filter cover is arranged in the dust collection chamber, And the filter cover is provided with a separation groove with an opening at the upper end, and the side wall of the separation groove is provided with an air inlet channel communicating with the air inlet of the main engine; a filter core, one end of the filter core is connected to the The outlet of the dust cup is connected, and the other end passes through the filter cover and is located in the separation groove; the bottom air duct is located at the lower part of the main engine and communicates with the outlet of the dust cup; and A motor assembly, the motor assembly is provided with a motor air duct, the inlet of the motor air duct communicates with the bottom air duct, and the outlet of the motor air duct communicates with the air outlet of the main engine; wherein, the inlet The tuyere is located in the middle of the host, and the air with sundries and dust enters the separation tank from the air inlet channel, and the air rotates in the separation tank to remove the sundries and dust from the The opening is thrown into the dust collection chamber, the air passes through the filter core and enters the bottom air channel, the dust is filtered by the filter core and remains in the separation tank, and then the air passes through the motor air channel from the The air outlet blows out.

In the main unit of the vacuum cleaner provided by the present invention, after the dust with dust and sundries enters the filter cover, the dust and sundries are thrown into the dust cup by centrifugal force, and the air passes through the secondary filtration of the filter element, and the air enters the bottom air duct and is filtered The matching structure of the cover and the dust cup is simple, and the volume is small. In addition, the air duct system is mainly located at the lower part of the host, which saves the volume of the upper part of the host and can reduce the volume of the host. Dust and sundries remain in the dust cup to ensure the vacuuming effect of the host.

Specifically, the size of the dust cup of the vacuum cleaner in the related art is too large, but the effective dust collection capacity has become smaller, the size of the whole machine has become larger, the suction has become weaker, and the noise is not satisfactory. However, the main unit of the vacuum cleaner provided by the present invention , the air with debris and dust enters the separation tank, the air rotates in the separation tank, most of the debris and dust are thrown out of the separation tank by centrifugal force, the debris and dust are thrown into the dust cup, and the air passes through the filter The filter core keeps the remaining dust and debris in the separation tank, the air passes through the filter core and enters the bottom air duct through the air outlet pipe, the air enters the motor air duct through the bottom air duct, and is discharged from the vacuum cleaner through the motor air duct, the filter cover The matching structure with the dust cup is simple and the volume is small. In addition, the air duct system is mainly located at the lower part of the host, which saves the volume of the upper part of the host, can reduce the volume of the host, and separates the filter cover and the filter element twice. Keeping dust and sundries in the dust cup ensures the vacuuming effect of the host.

In addition, the main unit of the vacuum cleaner in the above-mentioned embodiments provided by the present invention may also have the following additional technical features:

In the above technical solution, the filter cover includes: a housing, the housing encloses the separation groove with the opening at the upper end; an air inlet pipe, the inner wall of the air inlet pipe defines the air inlet channel, one end of the air inlet pipe communicates with the air inlet, and the other end communicates with the separation groove; and an air outlet pipe, one end of the air outlet pipe is connected with the bottom plate of the housing, and the other end is connected with the The outlet of the dust cup is connected, and the filter element is fixedly connected with the air outlet pipe.

In this technical scheme, the air with debris and dust enters the separation tank through the air inlet pipe, and the air rotates in the separation tank, and most of the debris and dust are thrown out of the separation tank by centrifugal force, and the debris and dust are Throw it into the dust cup, and the air will pass through the filter element to leave the remaining dust and debris in the separation tank. The air will pass through the filter element and enter the bottom air duct through the air outlet pipe. and debris are separated from the air.

In any one of the above technical solutions, the casing, the air inlet pipe and the air outlet pipe are of an integrated structure.

In this technical solution, the casing, the air inlet pipe and the air outlet pipe are of an integrated structure. On the one hand, the connection strength between the casing, the air inlet pipe and the air outlet pipe is ensured, thereby reducing the The probability of fracture between the pipe and the air outlet pipe ensures the overall strength of the filter cover and increases the reliability of the product. On the other hand, the filter cover can be made in one piece and can be mass-produced, thereby improving the production of the product. Efficiency, thereby reducing the manufacturing cost of the product and improving the market competitiveness of the product.

In any one of the above technical solutions, the filter opening of the filter element is located on a side of the filter element opposite to the air inlet channel.

In this technical solution, the path length of the air in the separation tank is increased, thereby increasing the time for the air to move in the separation tank, so that the impurities in the air can be thrown into the dust cup as much as possible in the separation tank, that is Effectively separate the debris from the air, thereby reducing the probability of debris blocking the filter element, improving the comfort of the product, and improving the market competitiveness of the product.

In any one of the above technical solutions, the main unit of the vacuum cleaner further includes: a filter part, the filter part is arranged between the outlet of the dust cup and the bottom air duct.

In this technical solution, the filter part performs secondary filtration on the air filtered by the filter element, and filters out the large dust in the air that is not filtered by the filter element, thereby ensuring that all the dust in the air remains in the vacuum cleaner, and Discharge cleanly into the room.

In any one of the above technical solutions, the motor assembly includes: an outer shell; a third air channel is arranged inside the outer shell, and the third air channel communicates with the air outlet; an inner shell is arranged on In the outer shell, the inner shell is provided with a first air duct, and a port of the first air duct communicates with the bottom air duct; in the middle shell, the middle shell is covered on the inner shell, and the A second air duct is provided in the middle shell, one port of the second air duct is connected to the other port of the first air duct, and the other port of the second air duct is connected to the third air duct and a motor, the motor is arranged in the inner casing; wherein, the first air duct, the second air duct and the third air duct constitute the motor air duct.

In this technical solution, the first air duct, the second air duct and the third air duct in the motor assembly form a labyrinth air duct, which increases the length of the motor air duct, thereby reducing the flow velocity of the air in the motor air duct, thereby It reduces the noise generated by the air flow too fast, increases the reliability of the product, and increases the market competitiveness of the product.

In any one of the above technical solutions, the other port of the first air channel is located on the side wall of the inner shell, and the other port of the second air channel is located on the side wall of the middle shell, so The other port of the second air duct is located on the side of the middle shell opposite to the other port of the first air duct.

In this technical scheme, the setting positions of the other port of the first air duct and the other port of the second air duct prolong the length of the motor air duct, thereby reducing the flow velocity of the air in the motor air duct, thereby reducing the The noise generated by the excessive flow rate increases the reliability of the product and the market competitiveness of the product.

In any one of the above technical solutions, the other port of the first air channel is formed by a plurality of first holes, and/or the other port of the second air channel is formed by a plurality of second holes.

In this technical solution, the other port of the first air channel is composed of a plurality of first holes, which can divide the air blown from the first air channel, reduce the flow speed of the air, thereby reducing the noise of the vacuum cleaner, and further It improves the comfort of the product and improves the market competitiveness of the product. Similarly, the other port of the second air duct is composed of multiple second holes, which can divide the air blown from the second air duct and reduce the The flow speed of the air reduces the noise of the vacuum cleaner, thereby improving the comfort of the product and improving the market competitiveness of the product.

In any one of the above technical solutions, the third air passage includes an upper air passage and a lower air passage, the upper air passage is located at the upper part of the casing, and the lower air passage is located at the lower part of the casing.

In this technical solution, the third air duct is divided into an upper air duct and a lower air duct, which increases the length of the motor air duct, thereby reducing the flow velocity of the air in the motor air duct, thereby reducing the noise caused by the excessively fast air flow, and increasing the It improves the reliability of the product and increases the market competitiveness of the product.

The embodiment of the second aspect of the present invention provides a vacuum cleaner, including the main unit of the vacuum cleaner described in any one of the above technical solutions.

The vacuum cleaner provided by the embodiment of the second aspect of the present invention has all the above-mentioned beneficial effects by being provided with the main unit of the vacuum cleaner provided by the embodiment of the first aspect of the present invention, which will not be repeated here.

Additional aspects and advantages of the invention will become apparent in the description which follows, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic cross-sectional structural view of the main body of the vacuum cleaner of the present invention;

Fig. 2 is a schematic diagram of an enlarged structure of part A in Fig. 1;

FIG. 3 is an enlarged structural schematic diagram of part B in FIG. 1 .

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 3 is:

10 dust cup, 11 dust collection chamber, 20 filter cover, 21 separation tank, 22 shell, 23 air inlet pipe, 24 air outlet pipe, 30 filter element, 40 bottom air duct, 50 motor assembly, 51 outer shell, 52 inner shell , 53 in the shell, 54 motors, 60 motor air ducts, 61 first air ducts, 62 second air ducts, 63 third air ducts, 631 upper air ducts, 632 lower air ducts, and 70 filter parts.

Arrows in the figure indicate the direction of air flow.

detailed description

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

The host of the vacuum cleaner according to some embodiments of the present invention will be described below with reference to FIGS. 1 to 3 .

As shown in FIG. 1 and FIG. 2 , the main body of the vacuum cleaner provided by the embodiment of the first aspect of the present invention includes: a dust cup 10 , a filter cover 20 , a filter core 30 , a bottom air duct 40 and a motor assembly 50 .

Specifically, the dust cup 10 has a dust collection chamber 11; the filter cover 20 is arranged in the dust collection chamber 11, and the filter cover 20 is provided with a separation groove 21 with an opening at the upper end, and the side wall of the separation groove 21 is provided with a The air inlet channel connected with the air inlet; one end of the filter element 30 is connected with the outlet of the dust cup 10, and the other end passes through the filter cover 20 and is located in the separation groove 21; The outlet of the motor is connected; the motor assembly 50 is provided with a motor air duct 60, the inlet of the motor air duct 60 communicates with the bottom air duct 40, and the outlet of the motor air duct 60 communicates with the air outlet of the host; wherein the air inlet is located in the middle of the host, The air with debris and dust enters the separation tank 21 from the air inlet channel, and the air rotates in the separation tank 21, throwing the debris and dust into the dust collection chamber 11 from the opening, and the air passes through the filter element 30 and enters the bottom wind In the duct 40, the dust is filtered by the filter core 30 and remains in the separation tank 21, and then the air is blown out from the air outlet through the motor air duct 60.

In the host machine of the vacuum cleaner provided by the present invention, the air with sundries and dust enters the separation tank 21, and the air rotates in the separation tank 21, and most of the sundries and dust are thrown out of the separation tank 21 by centrifugal force, and the sundries and dust thrown into the dust cup 10, the air passes through the filter core 30 to leave the remaining dust and debris in the separation tank 21, the air passes through the filter core 30 and enters the bottom air duct 40 through the air outlet pipe 24, and the air passes through the bottom air duct 40. The air duct 40 enters the motor air duct 60 and discharges the vacuum cleaner through the motor air duct 60. The cooperation between the filter cover 20 and the dust cup 10 is simple in structure and small in size. The volume of the upper part can reduce the volume of the main unit, and the dust and sundries will be left in the dust cup 10 through the two separations of the filter cover 20 and the filter core 30 to ensure the dust collection effect of the main unit.

In one embodiment of the present invention, as shown in FIG. 2 , the filter cover 20 includes: a housing 22 , an air inlet pipe 23 and an air outlet pipe 24 .

The casing 22 surrounds a separation groove 21 with an opening at the upper end; the inner wall of the air inlet pipe 23 defines an air inlet passage, and one end of the air inlet pipe 23 communicates with the air inlet, and the other end communicates with the separation groove 21; one end of the air outlet pipe 24 It is connected with the bottom plate of the housing 22 , and the other end communicates with the outlet of the dust cup 10 , and the filter element 30 is fixedly connected with the air outlet pipe 24 .

In this embodiment, the air with sundries and dust enters the separation tank 21 through the air inlet pipe 23, and the air rotates in the separation tank 21, and most of the sundries and dust are thrown out of the separation tank 21 by centrifugal force. The dust and dust are thrown into the dust cup 10, the air passes through the filter core 30 to leave the remaining dust and debris in the separation tank 21, the air passes through the filter core 30 and enters the bottom air duct 40 through the air outlet pipe 24, This kind of separation structure is simple and can effectively separate dust and sundries from the air.

In one embodiment of the present invention, the casing 22 , the air inlet pipe 23 and the air outlet pipe 24 are integrally constructed.

In this embodiment, the casing 22, the air inlet pipe 23 and the air outlet pipe 24 are of an integrated structure. The probability of fracture between the housing 22, the air inlet pipe 23 and the air outlet pipe 24 is reduced, thereby ensuring the overall strength of the filter cover 20 and increasing the reliability of the product. On the other hand, the filter cover 20 can be made in one piece , can be produced in batches, thereby improving the production efficiency of the product, thereby reducing the manufacturing cost of the product, and improving the market competitiveness of the product.

In one embodiment of the present invention, as shown in FIG. 2 , the filter port of the filter element 30 is located on the side of the filter element 30 opposite to the air inlet channel.

In this embodiment, the path length of the air in the separation groove 21 is increased, thereby increasing the time for the air to move in the separation groove 21, so that the impurities in the air can be thrown into the dust cup as much as possible in the separation groove 21 In 10, the sundries are effectively separated from the air, thereby reducing the probability of sundries blocking the filter element 30, improving the comfort of use of the product, and improving the market competitiveness of the product.

In one embodiment of the present invention, as shown in FIG. 1 , the main unit of the vacuum cleaner further includes: a filter part 70 .

Specifically, the filter part 70 is disposed between the outlet of the dust cup 10 and the bottom air duct 40 .

In this embodiment, the filter part 70 performs secondary filtration on the filtered air passing through the filter core 30, and filters out the large dust in the air that is not filtered out by the filter core 30, thereby ensuring that all the dust in the air remains in the vacuum cleaner In the clean discharge to the room.

In one embodiment of the present invention, the motor assembly 50 includes: an outer shell 51 , an inner shell 52 , a middle shell 53 and a motor 54 .

Specifically, the outer casing 51 is provided with a third air passage 63, and the third air passage 63 communicates with the air outlet; the inner casing 52 is arranged in the outer casing 51, and the inner casing 52 is provided with a first air passage 61. One port communicates with the bottom air duct 40; the middle shell 53 covers the inner shell 52, and the second air duct 62 is arranged in the middle shell 53, and one port of the second air duct 62 is connected with the other port of the first air duct 61 , the other port of the second air duct 62 communicates with the third air duct 63; the motor 54 is arranged in the inner shell 52; wherein, the first air duct 61, the second air duct 62 and the third air duct 63 constitute the motor air duct 60.

In this embodiment, the first air duct 61, the second air duct 62 and the third air duct 63 in the motor assembly 50 form a labyrinth air duct, which increases the length of the motor air duct 60, thereby reducing the motor air duct 60. The flow speed of the air inside is reduced, thereby reducing the noise caused by the excessive air flow, increasing the reliability of the product, and increasing the market competitiveness of the product.

In one embodiment of the present invention, as shown in FIG. 3 , the other port of the first air channel 61 is located on the side wall of the inner shell 52 , and the other port of the second air channel 62 is located on the side wall of the middle shell 53 , the other port of the second air duct 62 is located on the side of the middle shell 53 opposite to the other port of the first air duct 61 .

In this embodiment, the setting positions of the other port of the first air duct 61 and the other port of the second air duct 62 prolong the length of the motor air duct 60, thereby reducing the flow velocity of the air in the motor air duct 60 , thereby reducing the noise generated by the air flow rate too fast, increasing the reliability of the product and increasing the market competitiveness of the product.

In one embodiment of the present invention, as shown in FIG. 3 , the other port of the first air channel 61 is formed by a plurality of first holes, and/or, the other port of the second air channel 62 is formed by a plurality of second holes. Hole composition.

In this embodiment, the other port of the first air passage 61 is composed of a plurality of first holes, which can divide the air blown from the first air passage 61, reduce the flow speed of the air, and thereby reduce the noise of the vacuum cleaner , thereby improving the comfort of use of the product and improving the market competitiveness of the product. Similarly, the other port of the second air duct 62 is composed of a plurality of second holes, which can divide the air blown from the second air duct 62. The function reduces the flow speed of the air, thereby reducing the noise of the vacuum cleaner, thereby improving the comfort of the product and improving the market competitiveness of the product.

In one embodiment of the present invention, as shown in FIG. 3 , the third air duct 63 includes an upper air duct 631 and a lower air duct 632 , the upper air duct 631 is located at the upper part of the housing 51 , and the lower air duct 632 is located at the lower part of the housing 51 .

In this embodiment, the third air duct 63 is divided into an upper air duct 631 and a lower air duct 632, which increases the length of the motor air duct 60, thereby reducing the flow velocity of the air in the motor air duct 60, thereby reducing the air flow rate caused by the excessive flow velocity of the air. The noise generated increases the reliability of the product and the market competitiveness of the product.

The vacuum cleaner provided by the embodiment of the second aspect of the present invention includes the main unit of the vacuum cleaner described in any one of the above embodiments.

The vacuum cleaner provided by the embodiment of the second aspect of the present invention has all the above-mentioned beneficial effects by being provided with the main unit of the vacuum cleaner provided by the embodiment of the first aspect of the present invention, which will not be repeated here.

In summary, the host of the vacuum cleaner provided by the present invention, after the dust with dust and sundries enters the filter cover, the dust and sundries are thrown into the dust cup by centrifugal force, and the air passes through the secondary filtration of the filter element, and the air enters In the bottom air duct, the matching structure of the filter cover and the dust cup is simple and the volume is small. In addition, the air duct system is mainly located at the lower part of the host, which saves the volume of the upper part of the host and can reduce the volume of the host. The two separations leave dust and debris in the dust cup to ensure the vacuuming effect of the host.

Specifically, the size of the dust cup of the vacuum cleaner in the related art is too large, but the effective dust collection capacity has become smaller, the size of the whole machine has become larger, the suction has become weaker, and the noise is not satisfactory. However, the main unit of the vacuum cleaner provided by the present invention , the air with debris and dust enters the separation tank, the air rotates in the separation tank, most of the debris and dust are thrown out of the separation tank by centrifugal force, the debris and dust are thrown into the dust cup, and the air passes through the filter The filter core keeps the remaining dust and debris in the separation tank, the air passes through the filter core and enters the bottom air duct through the air outlet pipe, the air enters the motor air duct through the bottom air duct, and is discharged from the vacuum cleaner through the motor air duct, the filter cover The matching structure with the dust cup is simple and the volume is small. In addition, the air duct system is mainly located at the lower part of the host, which saves the volume of the upper part of the host, can reduce the volume of the host, and separates the filter cover and the filter element twice. Keeping dust and sundries in the dust cup ensures the vacuuming effect of the host.

In the present invention, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or two above, unless expressly defined otherwise. The terms "installation", "connection", "connection", "fixed" and other terms should be interpreted in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be directly or indirectly through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or unit referred to must have a particular orientation, be configured or operate in a particular orientation, and therefore, should not be construed as limiting the invention.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the present invention In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A host of a vacuum cleaner, comprising: A dust cup, the dust cup has a dust collection chamber; A filter cover, the filter cover is arranged in the dust collection chamber, and the filter cover is provided with a separation groove with an opening at the upper end, and the side wall of the separation groove is provided with a air intake channel; A filter core, one end of the filter core communicates with the outlet of the dust cup, and the other end passes through the filter cover and is located in the separation tank; a bottom air duct, the bottom air duct is located at the lower part of the host and communicates with the outlet of the dust cup; and A motor assembly, the motor assembly is provided with a motor air duct, the inlet of the motor air duct communicates with the bottom air duct, and the outlet of the motor air duct communicates with the air outlet of the host; Wherein, the air inlet is located in the middle of the main machine, and the air with sundries and dust enters the separation groove from the air inlet channel, and the air rotates in the separation groove to remove the sundries And the dust is thrown into the dust collection chamber from the opening, the air passes through the filter element and enters the bottom air duct, the dust is filtered by the filter element and remains in the separation tank, and then the air passes through the motor The air duct is blown out from the air outlet. 2. The main engine of the vacuum cleaner according to claim 1, wherein the filter cover comprises: a casing, the casing enclosing the separation groove with the opening at the upper end; an air inlet pipe, the inner wall of the air inlet pipe defines the air inlet passage, one end of the air inlet pipe communicates with the air inlet, and the other end communicates with the separation groove; and An air outlet pipe, one end of the air outlet pipe is connected to the bottom plate of the housing, and the other end is connected to the outlet of the dust cup, and the filter element is fixedly connected to the air outlet pipe. 3. The main engine of the vacuum cleaner according to claim 2, characterized in that, The casing, the air inlet pipe and the air outlet pipe are of an integral structure. 4. The main engine of the vacuum cleaner according to claim 1, characterized in that, The filter port of the filter core is located on the side of the filter core opposite to the air inlet channel. 5. The host of the vacuum cleaner according to claim 1, further comprising: A filter part, the filter part is arranged between the outlet of the dust cup and the bottom air duct. 6. The main engine of the vacuum cleaner according to any one of claims 1 to 5, characterized in that, The motor assembly includes: a casing; a third air passage is arranged inside the casing, and the third air passage communicates with the air outlet; An inner shell, the inner shell is arranged in the outer shell, a first air duct is arranged in the inner shell, and a port of the first air duct communicates with the bottom air duct; The middle shell, the middle shell is covered on the inner shell, the second air duct is arranged in the middle shell, one port of the second air duct is connected with the other port of the first air duct, the The other port of the second air passage communicates with the third air passage; and a motor, the motor is arranged in the inner shell; Wherein, the first air duct, the second air duct and the third air duct constitute the motor air duct. 7. The main engine of the vacuum cleaner according to claim 6, characterized in that, The other port of the first air channel is located on the side wall of the inner shell, the other port of the second air channel is located on the side wall of the middle shell, and the other port of the second air channel It is located on the side of the middle shell opposite to the other port of the first air duct. 8. The main engine of the vacuum cleaner according to claim 7, characterized in that, The other port of the first air channel is formed by a plurality of first holes, and/or the other port of the second air channel is formed by a plurality of second holes. 9. The main engine of the vacuum cleaner according to claim 6, characterized in that, The third air passage includes an upper air passage and a lower air passage, the upper air passage is located at the upper part of the casing, and the lower air passage is located at the lower part of the casing. 10. A vacuum cleaner, characterized by comprising the main unit of the vacuum cleaner according to any one of claims 1 to 9.