CN107997672B

CN107997672B - Vacuum cleaner

Info

Publication number: CN107997672B
Application number: CN201711032428.4A
Authority: CN
Inventors: 韦律
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2017-10-30
Filing date: 2017-10-30
Publication date: 2022-11-22
Anticipated expiration: 2037-10-30
Also published as: CN107997672A

Abstract

The invention provides a dust collector which comprises a dust barrel, a power head assembly arranged above the dust barrel and a battery pack for supplying power to the dust collector. The power head assembly comprises a shell, a fan arranged in the shell and a motor for driving the fan. The battery pack is provided with a first battery pack and a second battery pack, and the projected points of the gravity center of the first battery pack and the gravity center of the second battery pack on the horizontal plane are respectively connected with the projected points of the gravity center of the motor on the horizontal plane to form a first projected line and a second projected line. The first projection line and the second projection line are intersected to form an included angle, and the size of the included angle is between 48 degrees and 120 degrees. So set up, guaranteed that the focus of dust catcher is stable when the group battery of equipment different capacity for the dust catcher all keeps firm in normal use, transportation and storage, is difficult for empting.

Description

Vacuum cleaner

Technical Field

The invention relates to a dust collector.

Background

Vacuum cleaners are currently available in the market in a variety of sizes and configurations. However, the conventional vacuum cleaner is powered by only a single ac or dc power source. When a user uses the vacuum cleaner powered by the alternating current power supply, the user needs to use the electric wire to be connected to the alternating current power supply, and needs to drag the electric wire to move everywhere to perform dust collection operation, so that the moving convenience of the vacuum cleaner is seriously influenced. In particular, for installers, service technicians and business personnel in residential construction, these users may not be convenient at certain workplaces to obtain power, and may need to obtain ac power from nearby (e.g., neighbors) with long and heavy extension cords, or have to constantly unplug cords and find new power outlets.

In order to solve the inconvenience of moving an ac vacuum cleaner and the inconvenience of using it in a workplace without ac power, a vacuum cleaner driven by a dc power source and a vacuum cleaner that can selectively use an ac power source or a dc power source as required have appeared in the market. However, the driving voltage of the dc battery pack on the market is generally below 36V, the load power is generally below 400W, and the vacuum cleaner driven by the dc power supply has low power and poor performance. For vacuum cleaners driven by ac/dc power, there is a higher power and performance when using ac power, but there is also a lower power and performance when using dc power. The lower performance greatly reduces the efficiency of dust collection work, and even can not work effectively for professional users.

There is an upper limit for the discharge current of a typical cell, typically 10C, where C is the number of battery capacities in Ah. For example, in a 18650 electric core of 2Ah, the maximum value of the discharge current is 20A, and the optimum discharge current is generally half of the maximum value. It can be assumed that, for a dc device, the maximum value of the power, i.e. the maximum value of the current, is determined by the battery pack associated with the dc device. Therefore, in order to increase the maximum power of the dc device, the voltage of the battery pack must be increased to reduce the current of the unit cells so that the unit cells operate within the normal limit range. Therefore, the output voltage of the battery pack associated with the appliance must be increased to 60V or more to achieve a power of 1000W or more. For a high-power vacuum cleaner, the power is generally required to be increased to 1000W-1400W, and the vacuum cleaner has strong suction force and higher working efficiency.

A common professional high-power dry and wet dust collector comprises a dust barrel, a power head assembly and a battery pack for supplying electric energy. The volume of the dust barrel is usually more than 9gal, the height of the appliance is more than 500mm, if the positions of main components such as a battery pack, a motor and the like are not arranged, the appliance can be pulled by a hose to be toppled in normal use, and the appliance cannot stand on the ground with a certain gradient, so that the appliance is toppled, and inconvenience is brought to a user.

In view of the above, there is a need for an improved vacuum cleaner to solve the above problems.

Disclosure of Invention

The invention aims to provide a dust collector which is stable and not easy to topple over in the using, transporting and storing processes.

In order to achieve the purpose, the invention provides a dust collector which comprises a dust barrel, a power head assembly and a battery pack, wherein the power head assembly is arranged above the dust barrel, the battery pack is used for providing a power supply for the dust collector, the power head assembly comprises a shell, a fan and a motor, the fan is arranged in the shell, the motor is used for driving the fan, the battery pack is provided with a first battery pack and a second battery pack, a projection point of the gravity center of the first battery pack and a projection point of the gravity center of the second battery pack on a horizontal plane are respectively connected with a projection point of the gravity center of the motor on the horizontal plane to form a first projection line and a second projection line, the first projection line and the second projection line are intersected to form an included angle, and the size of the included angle is between 48 degrees and 120 degrees.

As a further improvement of the invention, the included angle is 60-80 degrees.

As a further improvement of the invention, the first projection line and the second projection line are equal in length.

As a further improvement of the present invention, the first battery pack and the second battery pack are on the same horizontal plane.

As a further improvement of the present invention, any two of the first battery pack, the second battery pack, and the motor are arranged in a staggered manner along a height direction of the vacuum cleaner.

As a further improvement of the invention, the power of the motor is more than 1000W.

As a further improvement of the present invention, the capacity of the first battery pack and/or the second battery pack is 2.5Ah or 5.0Ah.

As a further improvement of the present invention, the single-group output voltage of the first battery pack and the second battery pack is 60V.

As a further improvement of the present invention, the vacuum cleaner further includes a plurality of casters disposed at the bottom of the dust barrel, a center of gravity of each of the casters has a corresponding projection point on a horizontal plane, the projection points are connected to form a projection frame, and a projection point of a total center of gravity of the first battery pack, the second battery pack, and the motor on the horizontal plane coincides with a center point of the projection frame.

In order to achieve the above object, the present invention further provides a vacuum cleaner, including a dust barrel, a power head assembly mounted above the dust barrel, and a battery pack for providing a power source for the vacuum cleaner, where the power head assembly includes a housing, a fan disposed in the housing, and a motor for driving the fan, the battery pack has a first battery pack and a second battery pack, a projection point of a center of gravity of the first battery pack and a projection point of a center of gravity of the second battery pack on a horizontal plane are respectively connected with a projection point of the center of gravity of the motor on the horizontal plane to form a first projection line and a second projection line, the first projection line and the second projection line intersect to form an included angle β, and the included angle β satisfies the following relational expression:

[cos(β/2)] ² ＝(k+1)/(2×k)

wherein k = (m) _B +m _M )/m _B ，m _M Is the weight of the motor, m _B The weight of the battery pack is singly combined.

As a further improvement of the invention, the value range of k is 1.5-3.5.

The invention has the beneficial effects that: according to the dust collector, the positions of the first battery pack, the second battery pack and the motor are reasonably arranged, so that the projection of the total gravity center of the first battery pack, the second battery pack and the motor on a horizontal plane is as close as possible to the fitting center of the supporting point of the dust collector. So set up, guaranteed the dust catcher when the group battery of equipment different capacity, the focus of dust catcher is stable for the dust catcher all keeps firm in normal use, transportation and storage process, is difficult for empting.

Drawings

Fig. 1 is a perspective view of a vacuum cleaner of the present invention.

Fig. 2 is a schematic projection view of the centers of gravity of two battery packs and a motor on a horizontal plane under 9 different counter weights in the present invention.

Fig. 3 is a schematic view of a projection of the centers of gravity of two sets of battery packs and a motor on a horizontal plane according to an embodiment of the present invention.

Fig. 4 is a schematic projection view of the centers of gravity of two sets of battery packs and a motor on a horizontal plane according to another embodiment of the present invention.

FIG. 5 shows the distribution of the center of gravity of the caster wheel and the projected point of the overall center of gravity of the vacuum cleaner on the horizontal plane under different weights.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, a vacuum cleaner 100 includes a dust barrel 1, a power head assembly 2 mounted above the dust barrel 1, a battery pack 3 for supplying power to the vacuum cleaner 100, and casters 4 mounted at the bottom of the dust barrel 1. The power head assembly 2 includes a housing 21, a fan (not shown) disposed within the housing 21, and a motor 22 for driving the fan. Two accommodating bins 23 which are formed by inwards recessing the top wall of the shell 21 and used for placing the battery pack 3 are arranged on the shell 21. According to the requirement of the working state of the dust collector 100, the accommodating bin 23 can be assembled with two groups of the battery packs 3 at the same time for operation, and can also be assembled with a single group of the battery packs 3 for operation. Of course, the capacity of the battery pack 3 is not limited, and a low capacity version of 2.5Ah may be provided, and the weight may be generally about 1.3kg, or a high capacity version of 5.0Ah may be provided, and the weight may be generally 2.0kg.

For the sake of clarity, two accommodating chambers 23 are defined as a first accommodating chamber 231 and a second accommodating chamber 232, and correspondingly, the battery pack 3 includes two sets of battery packs, namely a first battery pack 31 and a second battery pack 32. The overall center of gravity of the vacuum cleaner 100 is different depending on the number and kinds of the battery packs 3 assembled by the vacuum cleaner 100.

As shown in table 1, there are 9 cases of the weights of the first accommodating chamber 231 and the second accommodating chamber 232:

TABLE 1 counterweight conditions of the first and

second bins

231 and 232

In the vacuum cleaner 100, the motor 22 is a heavy component in addition to the first battery pack 31 and the second battery pack 32. In the present invention, the power of the motor 22 is greater than 1000W, and usually about 2.0kg is used for a motor having a power of 1000W or more.

Referring to fig. 2, the projected points of the center of gravity of the first battery pack 31, the center of gravity of the second battery pack 32, and the center of gravity of the motor 22 on the horizontal plane are G ³¹ 、G ³² 、G ^M Is connected to said G ³¹ And G ^M And G ³² And G ^M Form a first projection line G ³¹ G ^M And the second projection line G ³² G ^M The first projection line G ³¹ G ^M And the second projection line G ³² G ^M The intersection forms an included angle beta. In the case of the 9 types of weights described in table 1, the projections of the overall centers of gravity of the first battery pack 31, the second battery pack 32, and the motor 22 in the vacuum cleaner 100 on a horizontal plane are respectively G ¹ 、G ² 、G ³ 、G ⁴ 、G ⁵ 、G ⁶ 、G ⁷ 、G ⁸ 、G ⁹ . It can be seen that the projection of the overall center of gravity of the motor 22, the first battery pack 31, and the second battery pack 32 on the horizontal plane is a quadrangle G ⁴ G ⁵ G ⁹ G ^M Moving within the range. At this time, a value R is introduced, R being a quadrilateral G ⁴ G ⁵ G ⁹ G ^M The size of the R value represents the variation range of the projection of the overall center of gravity of the motor 22, the first battery pack 31, and the second battery pack 32 on the horizontal plane, and the R value needs to be minimized in order to keep the vacuum cleaner 100 stable and not easy to topple in each state.

In the present invention, the first projection line G ³¹ G ^M And the second projection line G ³² G ^M Are equal in length. With this arrangement, the first battery pack 31, the second battery pack 32, and the motor 22 are arranged most closely, which is advantageous for reducing the R value.

Referring to fig. 3 to 4 in combination with fig. 2, fig. 3 and 4 show the change of the total gravity center of the first battery pack 31, the second battery pack 32 and the motor 22 in different positions. The minimum value of the R values is calculated as follows:

a projected point G passing through the center of gravity of the motor 22 ^M A straight line D is drawn. Let the weight of the motor 22 be m _M The weight of the first battery pack 31 is m _B ，G ³¹ G ^M Is L. As can be seen from FIGS. 3 and 4, the quadrilateral shapeG ⁴ G ⁵ G ⁹ G ^M There may be two cases for the radius R of the smallest full envelope circle: one is a circle of radius R1 and one is a circle of radius R2, R being the larger of R1 and R2.

Because, G ⁴ In the case where the second accommodating chamber 232 is empty, the projection of the overall center of gravity of the first battery pack 31, the second battery pack 32, and the motor 22 on a horizontal plane is shown. At this time, the G ⁴ In fact a projection of the overall center of gravity of the first battery pack 31 and the motor 22 on a horizontal plane. According to the lever principle, m _M ×G ⁴ G ^M ＝m _B ×G ⁴ G ³¹ ，

Then m is _M ×G ⁴ G ^M +m _B ×G ⁴ G ^M ＝m _B ×G ⁴ G ³¹ +m _B ×G ⁴ G ^M ，

Then G is ⁴ G ^M ×(m _M +m _B )＝m _B ×G ³¹ G ^M ，

Can be obtained, G ⁴ G ^M ＝m _B ×G ³¹ G ^M /(m _M +m _B )＝L×m _B /(m _M +m _B )。

Let k = (m) _B +m _M )/m _B Then G is ⁴ G ^M ＝L/k (1)

Please refer to FIG. 3, which shows a quadrilateral G ⁴ G ⁵ G ⁹ G ^M Radius R = R of the smallest full envelope circle of (c) ₁ ＝G ⁵ G ^M /2。

G is crossed ^M As a strip G ³¹ G ³² Perpendicular G ^M H, H is G ³¹ G ³² And G ^M Crossing point of H, cross G ⁴ As a strip G ^M Perpendicular G of H ⁴ F, F are G ⁴ F and G ^M H, the intersection point. In a clear view of the above, it is known that,

R ₁ ＝G ⁵ G ^M /2＝1/2(FG ^M +FG ⁵ ) (2)

at right triangle G ⁴ G ^M In F, FG ^M ＝G ⁴ G ^M ×cos(β/2) (3)

From Δ G ⁴ G ⁵ F∽△G ³¹ G ⁵ H，△G ⁴ G ^M F∽△G ³¹ G ^M H, obtaining the compound of the formula,

FG ⁵ /G ⁵ H＝G ⁴ F/G ³¹ H＝G ⁴ G ^M /G ³¹ G ^M ＝1/k (4)

at right triangle G ³¹ G ^M In H, FG ^M +FG ⁵ +G ⁵ H＝L×cos(β/2) (5)

R can be obtained by simultaneous calculation of the formulae (1) to (5) ₁ ＝[L×cos(β/2)]/(k+1) (6)

Please refer to FIG. 4, which shows a quadrilateral G ⁴ G ⁵ G ⁹ G ^M Radius R = R of the smallest full envelope circle of (c) ₂ ＝JG ^M Wherein J is the center of the minimum enveloping circle.

Passing J point as G ^M G ⁴ Perpendicular JQ, Q being JQ and G ^M G ⁴ The intersection point of (a).

It is known that R ₂ ＝JG ^M ＝G ^M Q/cos(β/2)＝1/2×G ⁴ G ^M cos(β/2)

＝L/[2×k×cos(β/2)] (7)

In the case where the weights of the first battery pack 31, the second battery pack 32, and the motor 22 are determined, the k value may be determined; in a case where the volumes of the first battery pack 31, the second battery pack 32, and the motor 22 have been determined, the minimum value of the L value may be determined, and when the weights and volumes of the first battery pack 31, the second battery pack 32, and the motor 22 are changed in an equal proportion, the total center of gravity of the three is not changed, and the projected point on the horizontal plane is not changed. Then, for both functions (6) and (7), only β is a variable. It can be seen that the domain of beta is 0 deg. -180 deg., R ₁ Is monotonically decreasing with respect to beta, R ₂ Is monotonically increasing with respect to β, since R takes R ₁ And R ₂ The larger of them, then only if R is ₁ ＝R ₂ When R is the minimum value, combining the two formulas (6) and (7)Is obtained by

[cos(β/2)] ² ＝(k+1)/(2×k) (8)

Since k = (m) _B +m _M )/m _B Is obtained by

[cos(β/2)] ² ＝(k+1)/(2×k)＝(2m _B +m _M )/(2m _B +2m _M ) (9)

As can be seen from equation (9), the k value is determined by the weight of the first battery pack 31 or the second battery pack 32 and the motor 22.

[cos(β/2)] ² = (k + 1)/(2 × k) =1/2+ 1/(2 k) > 1/2, and it can be seen that the maximum value of β is 120 °. In the invention, the value range of the k value is 1.5-3.5, and the value range of the included angle beta is 48-72 degrees. Considering that the vacuum cleaner 100 further includes some components, a dust collection duct structure and other components required for assembling the battery pack 3, and meanwhile, due to the limitation of the volume of the battery pack 3 and the overall appearance of the vacuum cleaner 100 is beautiful, the included angle β cannot be too small. The included angle beta ranges from 60 degrees to 120 degrees. Preferably, the included angle beta ranges from 60 degrees to 80 degrees.

In one embodiment, the first battery pack 31 and the second battery pack 32 are on the same horizontal plane. With such an arrangement, the projections of the center of gravity of the first battery pack 31 and the center of gravity of the second battery pack 32 on the horizontal plane are symmetrically distributed on two sides of the motor 22, which is beneficial to improving the balance and stability performance of the vacuum cleaner 100. In another embodiment, any two of the first battery pack 31, the second battery pack 32, and the motor 22 are arranged in a vertically staggered manner along the height direction of the vacuum cleaner 100, so long as the projected points of the centers of gravity of the first battery pack 31 and the second battery pack 32 on the horizontal plane are symmetrically distributed on both sides of the projected point of the center of gravity of the motor 22 on the horizontal plane.

The single-group output voltage of the first battery pack 31 and the second battery pack 32 is 60V. And a single group of the battery packs 3 is formed by connecting 15 battery cores in series. The battery cell is the most common 18650 battery cell in the market, and the nominal voltage of this kind of battery cell is 3.8V, full electric voltage 4.2V, capacity is 2.5Ah, and weight is 45g. In addition, the weight of the parts such as the battery pack shell, the battery cell bracket and the protection plate is 1.3kg. Of course, in order to prolong the service life of the vacuum cleaner 100, a 60V battery pack of a 5.0Ah high-capacity version with 30 battery cells may be selected, and the weight of the battery pack is about 2.0kg. With the arrangement, a voltage platform is realized, the configuration of the dust collector 100 is enriched corresponding to battery packs with various capacities, and the upgradability is increased.

Referring to fig. 5 in combination with fig. 1, the bottom of the dust barrel 1 is provided with four casters 4. The gravity center of each caster 4 has a corresponding projection point on the horizontal plane, the projection points are connected to form a projection frame, and the projection points of the total gravity center of the first battery pack 31, the second battery pack 32 and the motor 22 on the horizontal plane fall in the projection frame. Preferably, a projection point of the overall center of gravity of the first battery pack 31, the second battery pack 32, and the motor 22 on a horizontal plane coincides with the center point O of the projection frame. In this way, the balance of the cleaner 100 can be optimized. Of course, the number of the casters 4 may also be 3, 5 or other numbers according to the actual product design, and it is only necessary to ensure that the projection points of the total gravity center of the first battery pack 31, the second battery pack 32 and the motor 22 on the horizontal plane fall within the projection frame.

In summary, the positions of the first battery pack 31, the second battery pack 32, and the motor 22 are reasonably arranged, so that the projection of the total gravity center of the first battery pack 31, the second battery pack 32, and the motor 22 on the horizontal plane is as close as possible to the fitting center of the supporting point of the vacuum cleaner 100. With the arrangement, when the battery pack 3 with different capacities is assembled in the dust collector 100, the gravity center of the dust collector 100 is stable, so that the dust collector 100 is stable and is not easy to topple over in normal use, transportation and storage processes.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a dust collector, includes the dirt bucket, install in the power head subassembly of dirt bucket top and for the dust collector provides the group battery of power, the power head subassembly includes the casing, locates fan and drive in the casing the motor of fan, its characterized in that: the battery pack is provided with a first battery pack and a second battery pack, the projection points of the gravity center of the first battery pack and the gravity center of the second battery pack on the horizontal plane are respectively connected with the projection points of the gravity center of the motor on the horizontal plane to form a first projection line and a second projection line, the lengths of the first projection line and the second projection line are equal, the first projection line and the second projection line are intersected to form an included angle, and the included angle is between 48 degrees and 120 degrees.

2. The vacuum cleaner of claim 1, wherein: the included angle is 60-80 degrees.

3. The vacuum cleaner of claim 1, wherein: the first battery pack and the second battery pack are on the same horizontal plane.

4. The vacuum cleaner of claim 1, wherein: any two of the first battery pack, the second battery pack and the motor are arranged in a staggered manner along the height direction of the dust collector.

5. The vacuum cleaner of claim 1, wherein: the power of the motor is more than 1000W.

6. The vacuum cleaner of claim 1, wherein: the capacity of the first battery pack and/or the second battery pack is 2.5Ah or 5.0Ah.

7. The vacuum cleaner of claim 1, wherein: the single group output voltage of the first battery pack and the second battery pack is 60V.

8. The vacuum cleaner of claim 1, wherein: the dust collector further comprises a plurality of trundles arranged at the bottom of the dust barrel, the gravity center of each trundle is provided with a corresponding projection point on the horizontal plane and connected with the projection point to form a projection frame, and the projection points of the total gravity center of the first battery pack, the second battery pack and the motor on the horizontal plane are coincided with the central point of the projection frame.

9. The utility model provides a dust collector, includes the dirt bucket, install in the power head subassembly of dirt bucket top and for the dust collector provides the group battery of power, the power head subassembly includes the casing, locates fan and drive in the casing the motor of fan, its characterized in that: the group battery has first group battery and second group battery, the focus of first group battery with the projection point of the focus of second group battery on the horizontal plane links to each other respectively with the projection point of the focus of motor on the horizontal plane forms first projection line and second projection line, first projection line with the length of second projection line equals, first projection line with the intersection of second projection line forms contained angle beta, contained angle beta satisfies following relational expression:

[cos(β/2)] ² ＝(k+1)/(2×k)

10. The vacuum cleaner of claim 9, wherein: the value range of k is 1.5-3.5.