JPH03267034A - Electric cleaner - Google Patents

Abstract

PURPOSE:To easily judge a surface to be cleaned by providing a pressure- oscillation generating device at the suction inlet attached to an electric cleaner. CONSTITUTION:An electric cleaner is provided with a detector 9 for varying factors like static pressure, air volume, electric current, etc., by manipulating the suction inlet 7, a controller 8 for the suction capacity of a motor-driven fan 2 in accordance with the detected value of the detector 9. And a flap 13 is equipped at the joint part of the suction inlet 7 and a pressure-oscillation generating device automatically bringing about the pressure-oscillation is formed by energizing with a spring or coil spring 14. As a result, cleaning surfaces can easily be judged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vacuum cleaner whose operation can be controlled according to the type of suction port.

[Conventional technology]

In the vacuum cleaner described above, that is, the vacuum cleaner includes a sensor that detects a change in the operating state of the vacuum cleaner including an electric blower, and a control unit that controls the electric blower in response to a detected value of the sensor. Conventionally, it has been known to control the output of an electric blower according to a value detected by a sensor such as a pressure sensor, as described in, for example, Japanese Patent Laid-Open No. 61-280831.

[Problem to be solved by the invention]

The above-mentioned conventional technology does not take into consideration the type of surface to be cleaned, and the same control is performed for any surface to be cleaned.

An object of the present invention is to provide a suction spout that makes it easy to determine the surface to be cleaned, and furthermore, to provide a suction spout that allows you to determine what type of suction mouth you are currently using for cleaning. It is in.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a pressure pulsation generating mechanism in the suction port.

Further, each suction port is provided with a pressure pulsation generating mechanism having different characteristics in order to determine the type of suction port being cleaned.

[Effect]

The pressure pulsation generation mechanism configured in the suction port changes the period and magnitude of the pressure pulsation depending on the state of adsorption between the surface being cleaned and the suction port. By detecting this value or change, it is possible to determine the cleaning state.

Furthermore, by providing a pressure pulsation generating mechanism with different characteristics for each type of suction port, it becomes possible to determine the type of suction port being used.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the overall configuration of a vacuum cleaner 1 according to the present embodiment, in which 2 is an electric blower, 3 is a main body case, 4 is a dust collection case, 5 is a hose, 6 is an extension pipe, and 7 is a suction port. . Reference numeral 8 denotes a control device shown outside the vacuum cleaner main body as a block diagram, and is housed in the main body case 3 as a circuit board and microcomputer software. The configuration of the control device 8 includes an arithmetic processing device 10 that processes the amount detected by the detection device 9 and issues a command value to the power control device 1], and a power source 12 that supplies power to each of these devices. The detection device 9 detects factors that change depending on the operating state of the vacuum cleaner, such as an air volume sensor, a pressure sensor, a current sensor, and a rotation speed sensor of an electric blower. The air volume can be indirectly determined by the calculation unit 10 as a combination of quantities. The arithmetic processing device 10 also includes a device that determines the type of mouthpiece that is attached by determining the variation width and variation time interval of the change factor.

FIG. 2 shows a conventional mouthpiece, and FIG. 3 is a diagram showing details of a mouthpiece according to an embodiment of the present invention.

This is an example of a suction port for a shelf with a large opening area that is less susceptible to pressure fluctuations due to cleaning operations. In the conventional shelf suction port, since the opening area of the suction port is large, adhesion to the surface to be cleaned is difficult to occur and pressure fluctuations are difficult to occur. Therefore, as it is, there will be no change in the detected amount that indicates the cleaning state.

Therefore, in this embodiment, a flap 13 is provided at the joint part of the mouthpiece.
A pressure pulsation generating mechanism or a pressure pulsation amplifying mechanism that automatically generates pressure pulsations by being biased by a spring or helical spring 14 is formed. FIG. 4 shows the time course of pressure when a conventional suction port is attached and when a suction port equipped with a pressure pulsation amplification generating mechanism according to the present invention is attached to a vacuum cleaner and the vacuum cleaner is actually operated. In the conventional example, the pressure fluctuation during cleaning only varied depending on the close contact between the surface to be cleaned and the suction port, and the range of the fluctuation was small. However, when a flap is attached as in the present invention, in addition to fluctuations due to the close contact between the surface to be cleaned and the suction port, static pressure fluctuations due to the flap blocking the ventilation path of the suction port are added, and the range of fluctuation increases. This will be described in detail in FIG. FIG. 6 is a diagram showing aerodynamic characteristics, and a curve P is an output static pressure curve of the electric blower 2. A and A
The 'curve' shows the ventilation loss pressure including the suction port when the vacuum cleaner 1 in FIG. 1 is equipped with a conventional suction port. When the suction lower is moved on the surface to be cleaned, the contact state of the suction port changes and the ventilation resistance changes, so it fluctuates between A and A' (ΔH1). On the other hand, when the mouthpiece according to the present invention is attached,
When the flap is parallel to the ventilation path, it fluctuates between A and A', which is the same as when a conventional suction port is attached, but when the flap 13 moves in a direction that blocks the ventilation path in response to fluctuations in airflow, the ventilation changes. The loss pressure becomes curves B and B'. Therefore, the overall pressure fluctuation varies between A and B' (ΔH1), and the width of the fluctuation is larger than in the conventional example.

Here, the period T is the time required to reciprocate the suction port back and forth once on the surface to be cleaned.

Figure 5 shows the time course of static pressure when a suction port is attached with different support conditions for the flap that automatically vibrates due to airflow and generates pressure pulsations.
An example of changing the spring constant of 4 is shown below. When the spring constant is high, the natural frequency becomes large, so the period of pressure pulsation of the flap becomes short. In this way, by providing pressure pulsation generating devices with different characteristics at the suction port and detecting the period thereof, it is possible to determine the type of the suction port.

FIG. 7 shows the change in static pressure over time t when the length of the flap is changed. If the length of the flap is long, the change in the flow path area within the joint will be large, so the range of pressure fluctuation will be large. The pulsation period also becomes longer. In this way, the variation width and the pulsation period may be detected in combination to determine the mouthpiece and the floor condition.

Also, the same effect can be obtained by changing the width instead of changing the length.

Further, in this embodiment, an example of a pulsation generating mechanism using a flap is shown, but other mechanisms such as a windmill or a combination of a piston and a cylinder may be used.

〔Effect of the invention〕

According to the present invention, pressure pulsation is forcibly generated even in a suction port with a large opening area and small pressure fluctuations due to cleaning, such as a shelf-side suction port, and the fluctuation range of pressure pulsation is used as a detection amount when making a judgment based on the surface to be cleaned. You can use periods.

Furthermore, by changing the characteristics of the pressure pulsation generating mechanism depending on the suction port, it becomes possible to determine the type of suction port, and it becomes possible to perform control suitable for that suction port.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a vacuum cleaner according to an embodiment of the present invention, FIG. 2 is a diagram showing a conventional shelf vacuum cleaner, and FIG.
The figure shows a suction port according to an embodiment of the present invention, Fig. 4 shows the time course of static pressure during actual cleaning, and Fig. 5 shows a suction port with different flap support conditions. Figure 6 is a diagram showing the aerodynamic characteristics of a vacuum cleaner, and Figure 7 is a diagram showing the time course of static pressure when the length of the flap attached to the suction mouth is long and short. It is a diagram. 1...Vacuum cleaner, 2...Electric blower, 6...Extension tube, 7...Suction port, 9...Detection device, 13...Flap,
14] Around me

Claims (1)

[Claims] 1. Static pressure and air volume that vary by operating the suction port;
In a vacuum cleaner that has a detection device that detects a variable factor such as an electric current and a control device that controls the suction performance of an electric blower in response to the amount detected by the detection device, pressure pulsation occurs at a suction port attached to the vacuum cleaner. A vacuum cleaner characterized by being equipped with a mechanism. 2. In claim 1, the pressure pulsations generated by a suction port provided with a pressure pulsation generating mechanism are detected, and the suction performance of the vacuum cleaner is adjusted to a predetermined performance based on the difference in the period or size of the pressure pulsations. A vacuum cleaner characterized by controlling the vacuum cleaner so that 3. The vacuum cleaner according to claim 1, further comprising a pressure pulsation generating mechanism that generates different pressure pulsations for each attached suction port. 4. A vacuum cleaner according to claim 1, characterized in that the vacuum cleaner is equipped with a suction port in which a flap is provided in the ventilation path of the suction port to cause pressure pulsations. 5. The vacuum cleaner according to claim 4, characterized in that the suction port is provided with an impeller instead of the flap to generate pressure pulsations.