JPH04200426A - Vacuum cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a vacuum cleaner, and particularly to a device for determining the state inside a dust collection chamber of a vacuum cleaner.

[Prior art] In a conventional vacuum cleaner
As stated in Publication No. 31 (pressure cassette inside the main body), the detected value of the German detection values, such as static pressure, indicate that if the detection value exceeds a certain threshold value, it is a condition where no further cleaning is allowed.
5, but 2, in this case the collection mF! Even if the condition of the JX is the same (2), if the rotational speed of the electric blower changes, the test value will change depending on the rotational speed, and there is a possibility that the 1st value of the clogging state will change. [Problems to be Solved by the Invention] In the present invention, in the above-mentioned prior art, the static pressure H of the dust collecting section or the suction air volume Q of the vacuum cleaner reaches a certain threshold value, and the detected value exceeds it. The condition of the dust collecting part was determined to be clogged, and the condition of the dust collecting part was calculated as the load characteristic of the vacuum cleaner as a function of the static status I of the dust collecting part and the rotation speed N of the electric blower. Then, the load curve is calculated as follows:
By setting the threshold value for determining one state, it is possible to perform the function even if the rotational speed of the electric blower is different and the load of the vacuum cleaner is the same. Therefore, even if the rotational speed of the electric blower changes, for example, when switching from automatic operation to strong operation, there is no possibility that the clogging display will be erroneously switched off. Furthermore, by constructing a complementary JT-term as a function of the static pressure H of the dust collecting section and the rotational speed N of the electric blower, and correcting the load curve, errors in clogging display can be reduced without increasing the number of processors. Can be made smaller. Furthermore, the same effect can be achieved by using a detected value such as the suction air volume of a vacuum cleaner instead of the static value of the dust collecting section.9 [Means for Solving the Problem] To achieve the above object (2. Conventionally, if the static pressure H of the dust collection part or the vacuum cleaner's suction air JitQ etc. lowers a certain threshold value, and the detected value exceeds it, the dust collection part is clogged. The state of the dust collection section is defined as the load characteristic of the vacuum cleaner as a function of the static pressure H of the dust collection section and the rotational speed N of the electric blower. By using the threshold value for determining the condition, it is possible to eliminate the possibility that the clogging display may change erroneously even if the rotational speed of the electric blower changes. In addition, by using the second load curve as the threshold value for determining the clogging state of the dust collection section, setting multiple threshold values, and changing the contents of the display for each threshold value range, the clogging state can be detected. The screen is displayed in stages, allowing you to accurately determine whether the current state of clogging is serious or not. [Function] The load curve expressed as a function of the static pressure ■1 of the dust collection part and the rotation speed N of the electric blower shows that even if the rotation speed of the electric blower is different, if the load of the vacuum cleaner is the same, It becomes possible to determine that the conditions of the electric blower are the same, and the FI of the electric blower
] IJI with different number of rotations (−)
There will be no more erroneous errors in i:. It is an overall configuration diagram. 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 tube, and 7 is a mouthpiece. 8 is a block diagram of the control device shown outside the main body of the vacuum cleaner.
stored inside. The control device 8 converts the detected amount from the detection device 9 into the arithmetic processing device 1.
The configuration is such that arithmetic processing is performed with 0 and a command is issued to the power control device 11. Figure 2 shows the air volume Q and static pressure H of a vacuum cleaner.
This shows the relationship between Conventionally, static pressure H or air volume Q has been considered to be constant, as shown by straight lines A and B, to represent the state of the dust collecting section of a vacuum cleaner. In this case, when the rotation speed changes, the actual load on the vacuum cleaner changes from X) or from y to Z. Therefore, the actual load state and the load considered within the control device were different. Therefore, in the present invention, the similarity law for general fluids holds the relationships shown in Equations 1 and 2, and the value (H/
N2) Alternatively, the value Q/N obtained by dividing the suction air volume Q of the vacuum cleaner by the rotation speed N of the electric blower is constant, and this becomes the load curve of the vacuum cleaner, so vacuum cleaning is performed using the load curve found from this calculation formula. By representing the status of the dust collection section of the machine, it is possible to see the agreement between the actual load status and the load considered within the control device. Furthermore, the load curve calculated from this calculation formula includes some errors. Therefore, control accuracy can be improved by providing a correction term to the calculation formula as a function of the static pressure H of the dust collecting section or the suction air volume Q of the vacuum cleaner and the rotation speed N of the electric blower. In addition, this load curve is used as the threshold value for determining the clogging state of the dust collection section, and by setting multiple threshold values and changing the content of the display for each threshold value range, the clogging state can be gradually determined. is displayed, allowing you to accurately grasp the current state of clogging. Effect of the invention 1 According to the present invention, conventionally, even if the state of the dust collecting section is the same, when the rotation speed of the electric blower changes, the detected value changes according to the rotation speed, and the clogging state can be determined. The condition of the dust collection part that could have changed is calculated as the load characteristic of the vacuum cleaner as a function of the static pressure H of the dust collection part and the rotation speed N of the electric blower, and the load curve is calculated as the load characteristic of the dust collection part. By using the threshold value for determining the clogged state, it is possible to determine that the same clogged state is present even if the rotational speed of the electric blower is different, if the load on the vacuum cleaner is the same. Thereby, for example, even if automatic operation is switched to strong operation and the rotational speed of the electric blower changes, there is no possibility that the clogging display will be erroneously switched. In addition, the static pressure H in the dust collection section
By configuring a correction term as a function of the rotation speed N of the electric blower and correcting the load curve, it is possible to reduce the error in clogging display without increasing the number of sensors. Moreover, the same effect can be achieved by using a detected value such as the suction air volume of a vacuum cleaner instead of the static pressure of the dust collecting section. Furthermore, this load curve is used as the threshold value for determining the clogging state of the dust collection section, and by setting multiple threshold values and changing the content of the display for each threshold value range, the clogging state can be gradually determined. is displayed, allowing you to accurately grasp the current state of clogging.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall configuration diagram of a vacuum cleaner, and FIG. 2 is a diagram showing the relationship between air volume Q and static pressure (4) of the vacuum cleaner. l Vacuum cleaner 2 Electric blower 4 Dust collection section
9.Detection device 10 Arithmetic processing device. degree)

Claims (1)

[Claims] 1. A vacuum cleaner comprising: a detection means for detecting the state of a dust collecting section; and a control means for controlling the output of an electric blower according to information obtained from the detection means. A vacuum cleaner, characterized in that the state of the dust collecting section is calculated from the information of the detection means as a load curve of the vacuum cleaner, and the load curve is used as information in the control means. 2. In claim 1, the static pressure H of the dust collecting section
and the rotational speed N of the electric blower to calculate the load state of the dust collector, and use the result as information in the control means. 3. In claim 2, the static pressure H of the dust collecting section
is divided by the square of the rotation speed N of the electric blower (H/N
A vacuum cleaner characterized in that the load curve is calculated in step 2) and the result is used as information in the control means. 4. In claim 3, the static pressure H of the dust collecting section
is divided by the square of the rotation speed N of the electric blower (H/N
A vacuum cleaner characterized in that a correction term is provided in ^2) to calculate a load curve, and the result is used as information in the control means. 5. The vacuum cleaner according to claim 4, wherein the correction term is expressed as a function of the static pressure H of the dust collecting section and the rotation speed N of the electric blower. 6. Claim 1 provides that a load curve calculated from the static pressure H of the dust collecting section and the rotational speed N of the electric blower is used for determining the clogging state of the dust collecting section. Featured vacuum cleaner. 7. In claim 6, the control uses a plurality of load curves for determining the clogging state of the dust collecting section and changes the display content of the clogging state of the dust collecting section within each range. A vacuum cleaner characterized by: 8. In claim 1, the static pressure H of the dust collecting section
A vacuum cleaner characterized in that the suction air volume Q of the vacuum cleaner is used instead of , the load condition is calculated as a function of the rotation speed N of the electric blower, and the result is used as information in the control means. Machine. 9. In claim 8, a value Q obtained by dividing the suction air volume Q of the vacuum cleaner by the rotation speed N of the electric blower.
/N, and the result is used as information in the control means.