Patent Application
20190269287
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.
The disclosure relates to a vacuum cleaner, and especially relates to a mechanism for generating suction of a vacuum cleaner.
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.
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.
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.
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.
In one embodiment, the power difference between the main motor and the auxiliary motor is within 40%.
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.
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.
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.
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.
Now turning to
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
The power of the main motor and the auxiliary motor in the vacuum cleaner shown in
Now turning to the working principle of the vacuum cleaner shown in
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.
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.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201820288802.0 | Mar 2018 | CN | national |
