U.S. patent application number 16/286810 was filed with the patent office on 2019-09-05 for vacuum cleaner with an auxiliary motor.
The applicant listed for this patent is TTI (MACAO COMMERCIAL OFFSHORE) LIMITED. Invention is credited to Hei Man Raymond LEE, Yong Min LI, Zheng LI.
Application Number | 20190269287 16/286810 |
Document ID | / |
Family ID | 65773349 |
Filed Date | 2019-09-05 |
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United States Patent
Application |
20190269287 |
Kind Code |
A1 |
LI; Yong Min ; et
al. |
September 5, 2019 |
VACUUM CLEANER WITH AN AUXILIARY MOTOR
Abstract
A vacuum cleaner includes a main body and a vacuum head
connected to the main body through an air hose. The main body
includes a main motor and a main impeller driven by the main motor.
The vacuum head includes an auxiliary motor connected to the
auxiliary impeller and configured to drive the auxiliary impeller.
Both the main impeller and the auxiliary impeller are in the duct
of the vacuum cleaner. The vacuum uses two smaller power motors to
combine the vacuuming effect of the high power motor. This not only
reduces costs, improves overall efficiency, but also reduces
noise.
Inventors: |
LI; Yong Min; (Dongguan
City, CN) ; LEE; Hei Man Raymond; (Kwai Chung,
HK) ; LI; Zheng; (Dongguan City, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
TTI (MACAO COMMERCIAL OFFSHORE) LIMITED |
Macau |
|
MO |
|
|
Family ID: |
65773349 |
Appl. No.: |
16/286810 |
Filed: |
February 27, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47L 9/2842 20130101;
A47L 9/246 20130101; A47L 5/365 20130101; A47L 5/362 20130101; A47L
9/1418 20130101; A47L 9/22 20130101 |
International
Class: |
A47L 5/36 20060101
A47L005/36; A47L 9/14 20060101 A47L009/14; A47L 9/22 20060101
A47L009/22 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 1, 2018 |
CN |
201820288802.0 |
Claims
1. A vacuum cleaner, comprising: a main body comprising a main
motor and a main impeller driven by the main motor; a vacuum head
connected to the main body by an air hose; wherein the vacuum head
further comprises an auxiliary motor connected to an auxiliary
impeller and configured to drive the auxiliary impeller; the main
impeller and the auxiliary impeller being both located in an air
channel of the vacuum cleaner.
2. The vacuum cleaner according to claim 1, wherein the vacuum head
has a substantially rectangular shape; the auxiliary motor and the
auxiliary impeller located at a substantially middle position along
the longitudinal direction of the rectangle.
3. The vacuum cleaner according to claim 1, wherein the power
difference between the main motor and the auxiliary motor is within
40%.
4. The vacuum cleaner according to claim 1, wherein the main body
further includes a power source; a cable being further connected
between the vacuum head and the main body; and the auxiliary motor
being powered by the power source through the cable.
5. The vacuum cleaner of claim 1, wherein the main body further
includes a container configured to store debris, the container
connected to the vacuum head by the air hose.
6. The vacuum cleaner of claim 5, wherein the container includes a
dust bag.
7. The vacuum cleaner of claim 1, further comprising a power source
for the main motor and the auxiliary motor.
8. The vacuum cleaner of claim 7, wherein the power source includes
a battery.
8. The vacuum cleaner of claim 7, wherein when the power source is
started, the main motor and the auxiliary motor rotate at the same
time and together generate a suction force.
9. The vacuum cleaner of claim 1, wherein both the auxiliary motor
and the main motor increase a suction force in the air channel.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to Chinese Utility Model
Application No. 201820288802.0, filed Mar. 1, 2018, the entire
contents of which are hereby incorporated by reference herein.
FIELD OF THE DISCLOSURE
[0002] The disclosure relates to a vacuum cleaner, and especially
relates to a mechanism for generating suction of a vacuum
cleaner.
BACKGROUND
[0003] Vacuum cleaners sucks dust or the like on the ground or
items into a container by the suction force generated by the
impeller driven the motor. Large household vacuum cleaners
typically have a main body that includes a power source, a motor, a
control circuitry, and a vacuum head that can be operated by the
user by hand, and positioned relative to the body. The vacuum head
is connected to the main body through an air hose, so that negative
pressure generated by the impeller of the main body can cause dust
impurities and the like to be sucked into the vacuum head together
with the air, and reach the container of the main body through the
air hose.
[0004] A problem with prior art vacuum cleaners is that the suction
force at the vacuum head is not equal to the original suction force
generated by the motor and the impeller in the main body.
Conversely, as the length of the air channel of the vacuum cleaner
(e.g., air hose) increases, the suction force at the air inlet of
the vacuum head is reduced. In order to maintain a desired
vacuuming effect, the vacuum cleaners in prior art use high power
motors. However, the use of high power motor does not only have a
significant impact on power consumption, but also makes circuit
design more complex, and high power motors put forward higher
requirements on the electrical characteristics of various circuit
components.
SUMMARY
[0005] Accordingly, an embodiment provides a vacuum cleaner
including a body and a vacuum head connected to the main body via
an air hose. The main body includes a main motor and a main
impeller driven by the main motor. The vacuum head includes an
auxiliary motor connected to the auxiliary impeller and configured
to drive the auxiliary impeller. Both the main impeller and the
auxiliary impeller are located in the air channel of the vacuum
cleaner.
[0006] The vacuum head has a generally rectangular shape in one
embodiment. The auxiliary motor and the auxiliary impeller are
located at a substantially middle position along the longitudinal
direction of the rectangle.
[0007] In one embodiment, the power difference between the main
motor and the auxiliary motor is within 40%.
[0008] In another embodiment, the main body further includes a
power source. A cable is also connected between the vacuum head and
the main body. The auxiliary motor is powered by the power source
through the cable.
[0009] The vacuum cleaner thus gets rid of the use of a single high
power motor, and uses two motors to collectively produce a suction
force. Both motors have lower power, but because they work together
in a relay-race-like way, they produce a suction force similar to
that of a single high power motor. This design makes the circuit
design of the vacuum cleaner simpler, eliminating the need to
configure high power components to meet the operating requirements
of high power motors. In other words, the present utility model can
use two smaller power motors as a combination to achieve the
vacuuming effect of a high power motor. This not only reduces
costs, improves overall efficiency, but also reduces noise.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The performance and advantages will be further understood by
reference to the remainder of the specification and the
accompanying drawings; the same components in the drawings have the
same reference numerals. In some cases, a subtag is placed after a
reference numeral and hyphen to represent one of many similar
components. When referring to a reference numeral but does not
specifically state an existing subtag, it refers to all of these
similar components.
[0011] FIG. 1 shows a schematic view of the appearance of a vacuum
cleaner according to the first embodiment.
[0012] FIG. 2 is a schematic view showing the position of an
auxiliary motor in the vacuum head of the vacuum cleaner of FIG.
1.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0013] Embodiments use two motors and impellers to collectively
generate suction so that two smaller power motors together produce
a suction equivalent to a high power motor. Other different
benefits and advantages provided by the various embodiments readily
apparent from the following description.
[0014] Now turning to FIG. 1, in a first embodiment, a vacuum
cleaner comprising components such as main body 20, vacuum head 24,
and an air hose 22 connecting the main body 20 and the vacuum head
24. Wherein, the main body contains (neither is shown) a power
source, a main motor connected to the power source, a main impeller
connected to the main motor and driven by the main motor, a control
portion, a user switch, a dust bag, and the like. The power source
can be an AC adapter suitable for connection to a mains supply, or
a battery pack. The main impeller is located in the duct of the
main body 20, and one end of the duct is connected to the hose 22,
and the other end of the duct is connected to the dust bag, so that
dust impurities and the like which are sucked from the hose 22 by
the main body 20 can be attracted to the dust bag due to the
suction force (negative pressure) generated by the main
impeller.
[0015] One end of the hose 22 is connected to the duct of the main
body 20, and the other end is connected to the duct of the vacuum
head 24, and they together constitute the air channel of the entire
vacuum cleaner, that is, the air channel is from the air inlet of
the vacuum head 24 to the dust bag of the main body 20. As shown
clearly in FIG. 2, the vacuum head 24 has an auxiliary motor 28
located in the middle position of the vacuum head 24. The middle
position referred to in this embodiment is based on the
substantially rectangular shape of the vacuum head 24, and the
middle position is located at a middle point in the longitudinal
direction of the rectangle. As shown in FIG. 2, such a middle
position causes the auxiliary motor 28 and the auxiliary impeller
(not shown) fixed thereto to be aligned with an air outlet (not
shown) of the hose 22 on the vacuum head which abuts the hose 22.
In addition, an electric cable 26 is provided between the main body
20 and the vacuum head 24 in addition to the hose 22. The cable 26
connects the above described power source to the auxiliary motor 28
in the vacuum head 24 so that the latter can be powered.
Preferably, the cable 26 can be secured to the hose 22 to change
shape or movement together with the latter.
[0016] The power of the main motor and the auxiliary motor in the
vacuum cleaner shown in FIGS. 1-2 are relatively small, and the
power difference between them is not much. Preferably, the power
difference between the auxiliary motor of the vacuum head and the
main motor of the main body is within 40% (based on the highest
power motor).
[0017] Now turning to the working principle of the vacuum cleaner
shown in FIGS. 1-2. When the power source of the vacuum cleaner is
started, the main motor and the auxiliary motor rotate at the same
time, and together generate a suction force, since the main
impeller and the auxiliary impeller are simultaneously located
within the air channel of the vacuum cleaner. Specifically, the
main motor and the auxiliary motor operate in a relay-race-like
way. The auxiliary motor in the vacuum head increases the suction
force of the front stage so that dust impurities near the vacuum
head are relatively easily sucked into the vacuum head through the
auxiliary impeller. At the same time, the main motor on the main
body enhances the air flow so that the dust impurities sucked into
the vacuum head further pass through the air hose to the main body.
This design achieves the effect of a single high power motor with
two smaller power motors, which achieves reducing costs, improving
overall efficiency and reducing noise.
[0018] Therefore, after introducing several embodiments, those
skilled in the art will recognize that various modifications, other
structures, and equivalents can be used without departing from the
spirit of the present utility model. Accordingly, the above
description should not be taken as limiting the scope of the
invention as defined by the following claims.
[0019] For example, the above mentioned vacuum head has a
substantially rectangular direction, and the auxiliary motor and
the auxiliary impeller are located at the substantially middle
position along the longitudinal direction of the rectangle.
However, those skilled in the art will appreciate that other types
of vacuum heads can also be configured with auxiliary motors in
accordance with the present utility model, such as gun shaped
vacuum head, etc.
* * * * *