JPH03131219A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To enable optimum suction control for various suction ports, to be performed without any trouble, and save power and attenuate noise at the time of not operating suction ports by operating the suction ports to increase suction performance, and by stopping the operation of the suction ports to reduce the suction performance. CONSTITUTION:A controller 6 is formed with a processing device 10 for processing the detecting quantity of a detector 9 and directing the output of a command value to a power controller 11, and a power source 12 for feeding power to these respective devices. In this case, on the suction port of a large opening area, a fluctuation width is made smaller, and on the cavity suction port of a small opening area, the fluctuating width is made larger, and so, if the case of a change rate exceeding a specified discriminating value is just counted, it can be discriminated via the device 10 whether the port of the cavity aperture or the like of the small opening area is operated or not. As a result, at the time of non-cleaning, suction performance can be lowered, power can be saved, and noise can be attenuated. By automatically enhancing the suction performance while operating suction ports and detecting load fluctuation, the performance suitable for cleaning can be obtained.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides a detection device for detecting a change in the operating state of a vacuum cleaner equipped with an electric blower, and a detection device for detecting a change in the operating state of a vacuum cleaner equipped with an electric blower, and a detection device for detecting a change in the operating state of a vacuum cleaner equipped with an electric blower. The present invention relates to a vacuum cleaner including a control device for controlling the vacuum cleaner.

C. Prior Art] A detection device that detects a change in the operating state of the vacuum cleaner, that is, a vacuum cleaner equipped with an electric blower, and a control section that controls the electric blower in response to a detected value of the detection device. Conventionally, vacuum cleaners equipped with
As described in Japanese Patent No. 280831, it is known to control the output of an electric blower according to a value detected by a sensor such as a pressure sensor.

However, no consideration has been given to optimal operation control depending on whether or not the suction port is operated, that is, whether or not it is in a cleaning state.

In particular, no consideration was given to operation control in the case where different types of suction ports are used interchangeably or in the air volume range where the filter is clogged.

Here, the differences in operating characteristics depending on the suction port are as follows. A suction port with a wide opening area, such as the general floor suction port 7 shown in FIG. 2, and a suction port with a narrow opening area, such as the gap suction port 8, with a narrow tip end have different air volume ranges during actual use.

FIG. 3 is a diagram showing the aerodynamic characteristics when the general floor suction port 7 is used, and curve 1 is the output static pressure curve of the electric blower 2. Curves A and A' show the ventilation loss pressure including the suction port when the filter 4 of the vacuum cleaner 1 in FIG. 1 is not clogged. When the suction lower is moved over 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'. Since the ventilation loss at the suction port decreases as the air volume Q decreases, the difference between A and A', which is the variation in pressure loss due to the cleaning operation, also becomes smaller, and as shown in Figure 3, A
It can be seen that A' is a convex curved surface, and the curves are closer together on the small air volume side.

Curves B and 87 show the ventilation loss pressure when the filter 4 is clogged.

The value becomes larger than A' by the amount of increase in pressure loss due to clogging of the filter 4. The difference between B and B' is the variation in pressure loss at the suction port corresponding to each air volume Q due to the above-mentioned cleaning operation. Further, the wind iQ (b) indicates the lower limit of practical use in terms of dust absorption performance.

On the other hand, the aerodynamic characteristics when the gap suction port 8 is attached are shown in FIG. 5. Assuming that the output aerodynamic characteristic P of the electric blower 2 is the same as that shown in FIG. is large, and even when the filter 4 is not clogged, there is a large ventilation pressure loss as shown by curve C, and even when the suction port 8 is suspended in the air above the cleaning surface at maximum air volume, the magnitude of the airflow is iQ (c).

This value is the lower limit wind ff1 of the actual usable air volume range in Figure 3.
The air volume is approximately equal to or slightly larger than the value of Q (b).

Curve C' shows the ventilation loss at the upper limit of the variation when the suction port 8 is moved over the surface to be cleaned. Since the opening of the suction port 8 is small, the loss when the opening comes into close contact with the surface to be cleaned becomes a large value, and the fluctuation range of c and c' is the same as the fluctuation range of the general use suction port 7 A The value is larger than the value of A'.

The lower limit air volume that can actually be used when the filter 4 is clogged is the air volume Q (d), and the ventilation loss curve at that time.

And the opening line at the time of ventilation loss on the upper limit of variation is shown as D'.

In this way, the actual usable air volume range Q (a) - Q (b) of a suction port with a large opening area like the general use suction port 7 and the actual usable air volume range of a suction port with a small opening area such as the gap suction port 8. 8Q(c)-Q(d) are different. Figure 3,
Comparing the typical examples shown in FIG. 5, the air volume Q(a)>air volume Q(c), and the scenery Q(b)>air volume Q(c).

Figure 3 illustrates the normal use range, which is the air volume range that can actually be used, and the non-use range, which is the unusable range from the perspective of reduced dust suction performance. Figures 4 and 6 correspond to Figure 5.
It will look like the figure.

Here, as shown in each diagram, the air volume Q (a) is outside the normal usage range.
, Q (c) or higher range, and wind 1itQ (b).

Q(d) In the following ranges, it is desirable to significantly reduce the suction performance to save power and reduce the bL sound.8 [Problem to be solved by the invention] Control should be carried out to obtain such suction characteristics. If it is multiplied by J,
As can be seen by superimposing FIG. 4 and FIG. 6 as shown in FIG. 7, one suction characteristic cannot achieve both suction [-1 without any problems. Sunao〕chi, wind 1tQ (b)
If the following is a characteristic that reduces the suction force, for suction "2" with a small opening like the gap suction port 8, the suction force will be controlled to a low level from an early stage. However, it has the disadvantage that the suction force is weak within the practical range. On the other hand, air volume Q (d)
If the suction force is reduced in the following range, it can be used in situations where sufficient dirt suction power cannot be obtained for a suction with a large opening area such as floor suction ()7. There were drawbacks to it.

The main object of the present invention is to provide a vacuum cleaner that enables optimum suction force control without any problems for various suction ports having different actual airflow ranges.

Another object of the present invention is to provide an electric vacuum remover that saves power and reduces noise when not cleaning without operating the suction.

[Step-F for solving problems]

The main purpose of the above is to detect changes in static pressure, air volume, current, etc. by operating the suction port, etc. In response to the detected amount of the detection device, the suction performance of the blower can be adjusted. In a vacuum cleaner that controls a control device, the control device increases the suction performance when the suction is operated by -1 (1.l-), and increases the suction performance when the suction port is stopped This is achieved by reducing the suction performance.

[1] The first lower limit of the actual air flow range and the second limit value are set on the lower air flow side than the first limit value. In the air volume range below the lower limit value of , the suction performance is significantly reduced, and in the air volume range between the first and second lower limit values, if there is a load change due to the operation of the suction [ ], , the predetermined control is performed to increase the suction performance 7
, if there is no load fluctuation, this is achieved by maintaining the low suction performance state as it is.

[Effect]

It detects changes in factors such as static pressure, air volume, and airflow that vary due to suction operation, and if the fluctuation exceeds a predetermined value within a predetermined time, it indicates that cleaning is in progress by operating the suction port. By increasing the suction performance by a predetermined number of times, the suction force required for cleaning can be increased to 9().Furthermore, if no load change is detected within a predetermined time, By reducing the suction performance by a predetermined amount, it is possible to save power and reduce noise when not cleaning.

〔Example〕

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

FIG. 1 shows a block 1-seal 1 configuration of a vacuum cleaner
2 is an electric blower, 3 is a main body case, 4 is a filter for filtering out dust, and 5 is a collection case.

6 is a control device shown outside the vacuum cleaner body as a block diagram, and 1 circuit board and microcomputer software 1-
The configuration of the control device 6, which is housed in the main body case 3, includes an arithmetic processing device 10 that calculates the detected amount of the detected quantity [n9 (gamma processing and outputs a command value to the power control device]), and each of these components. 2.The detection device 53 detects wind-11 (sensors, pressure sensors, current sensors, electric blower speeds, ←4ξ number sensors, etc.).
It is a value that tests factors that change depending on the air flow condition, and can be output directly as a detected amount that indicates the air volume, or indirectly calculated by calculating the air volume as a combination of each detected amount.J11
It can be captured by one device i"ilo.

13 is a discriminant included in the arithmetic processing device 10: ;t;
The I;a state such as the variation width and variation time interval of the above-mentioned change factor is determined, and the seed tip of the device is determined. In other words, as mentioned above in the explanation of FIGS. 3 and 4, if we take as an example the discrimination based on the variation range ΔH or ΔQ of the static pressure H or air volume Q due to the operation of the suction port, the variation range is small for the suction port with a large opening area, and In the case of a suction port for a gap having a small area, the close contact and opening are repeated and the variation range becomes large, so it is possible to discriminate based on a predetermined judgment value. That is, by counting only when the amount of change is larger than a predetermined determination value, it can be determined whether or not a suction opening with a small opening area such as a gap circumference is being operated. Although this function may be configured using an electronic circuit, it is preferable to configure it using control software of a microcomputer in view of configuring the entire arithmetic processing device 10.

An example in which the suction characteristics are controlled using the above configuration is shown in the double-dashed line in FIG.

In other words, the first lower limit value of the actual air volume range is set to the wind ff1
Q(b), the second lower limit value is set as the air volume Q(d), and in the air volume range below Q(b), the suction performance is controlled to be low as indicated by Pl, and the path (b) → (1) →(2)→(3
) → (4) → Operate with the suction characteristics shown in (5).

Here, especially when operating in a range between air volume Q (b) and Q (d), count the number of times the fluctuation range of the detection value by the detection device 9 is greater than or equal to a predetermined judgment value at predetermined intervals. This makes it possible to determine that a suction port with a small opening area is installed and is being operated. By commanding and controlling the arithmetic processing unit 10 to increase the suction performance by a predetermined amount based on the signal from the discriminator 13 having this function, the suction performance (path (6) -
(7)).

If fluctuations exceeding the threshold value are not counted during the specified time, it is either during non-cleaning when the suction port is not operated, or the device has a suction port with a large opening area, and the suction performance is set to low to save power. , just drive with low noise.

In this way, by knowing the magnitude of the five load fluctuation ranges, the number of fluctuations within a predetermined time, and the operating point air volume, it becomes possible to automatically realize the optimal suction characteristics for the suction port of the device.

An example of this suction performance increase/decrease control is shown in Figures 9 to 12.
As shown in the figure. In comparing FIG. 9 and FIG. 10, FIG. 10 shows an example in which the load fluctuation detection value is detected as a change in static pressure, with the horizontal axis representing time.

In FIG. 10, the load fluctuation ΔH during a predetermined time T
If there is no rotation speed N1 of the electric blower 2, the suction performance is maintained at the static pressure H1. If one or more fluctuations ΔH exceeding a predetermined judgment value are counted in each detection period T,
As shown in (A) of the figure, in order to achieve high suction performance, the engine is operated with the rotational speed set to N[ and the static pressure raised to Hll. If the fluctuation ΔH is not counted from this state, (B) in the figure
Return the rotation speed to the original N1 to achieve low suction performance. This control is based on this control, but if switching between (A) and (B) shown in the figure is repeated frequently for each period T, sudden changes in suction performance will be repeated in a short period of time, resulting in whirring. Since problems such as fluctuations in noise and vibrations of the vacuum cleaner may occur, control may be performed to lower the suction performance if the period T without load fluctuations continues for 0 times nXT.

Further, as shown in FIGS. 11 and 12, the amount of increase in suction performance may be increased or decreased in proportion to the number of fluctuations during the detection period T, or may be increased or decreased in a secular manner as a predetermined function of the number of fluctuations. At this time, if there is no long-term load fluctuation, the initial low suction performance H1 is
By setting a + n as the minimum suction performance value when the number of operations is low at the level of one fluctuation, and HM^X as the maximum suction performance value when the suction port is operated many times at high speed, it can be adjusted to suit the user's sense. It is also possible to automatically control the suction performance.

Furthermore, the above-mentioned control air volume range is the air volume Q (b) in Fig. 8,
Although we have shown the example of the range between Q (d), it is not limited to this air volume range, but by controlling the suction performance in response to the presence or absence of load fluctuations due to suction port operation and the number of times over the entire air volume range. Needless to say, power saving and noise reduction can be achieved when the suction mouth is not operated, ie, when not cleaning. Furthermore, the same effect as described above can be obtained by controlling the suction performance in accordance with the frequency of operation of the suction port.

〔Effect of the invention〕

According to the present invention, when the suction port is not operated and the suction port is not being cleaned, the suction performance can be lowered to save power and reduce noise.

It is possible to detect load fluctuations caused by operating the suction port and automatically increase suction performance to obtain performance suitable for cleaning.

It becomes possible to automatically control suction performance in accordance with the frequency of operation of the suction port.

Compatible with suction ports with a large opening area and suction ports with a small opening area, suction performance is automatically increased when operating small opening area suction ports with large load fluctuations due to suction port operation only within the specified air volume range. It is controllable, and the optimal operation control that matches the mouthpiece can be automatically performed by determining the mouthpiece.

[Brief explanation of the drawing]

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 perspective view showing the external appearance of the suction port, and Fig.
Figures 8 through 8 are aerodynamic characteristic diagrams showing the relationship between the output characteristics of the electric blower and the load characteristics of the suction port, etc. Figures 9 through 1 and 2 are the relationships between temporal changes during automatic control of aerodynamic characteristics. FIG. ]...Vacuum cleaner. Electric blower, ...control device. Fig. Fig. Fig. Fig. (1) Lice Q-1 - Fig. 5 Section Fig. Fig. Air volume Q - Fig. Air volume Q→ Fig. 0 Fig. 0 Time - Section 1 Air volume Q→ Fig. 2 0 time t-4

Claims (1)

[Claims] 1. Static pressure and air volume that vary by operating the suction port;
In a vacuum cleaner having 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, the control device is configured to: A vacuum cleaner characterized by increasing suction performance and reducing suction performance when the operation of the suction port is stopped. 2. The vacuum cleaner according to claim 1, wherein the control device is capable of setting an upper limit value for increasing suction performance and a lower limit value for reducing suction performance. 3. Static pressure and air volume that fluctuate by operating the suction port,
In a vacuum cleaner that has a detection device that detects a variable factor such as current and a control device that controls the suction performance of an electric blower in response to the detected amount, the control device causes the suction to stop when the suction port is not operated for a certain period of time or more. A vacuum cleaner characterized by reducing its performance to a predetermined level. 4. Depending on whether or not the suction port is operated at regular intervals, if there is operation, the suction performance per predetermined amount will be cumulatively increased, and if there is no operation, the suction performance per predetermined amount will be cumulatively decreased. The vacuum cleaner according to claim 1, characterized in that: 5. The vacuum cleaner according to claim 4, wherein an upper limit value for increasing the suction performance and a lower limit value for reducing the suction performance are set. 6. The vacuum cleaner according to claim 2, wherein when the suction port is not operated for a certain period of time or more, the vacuum cleaner is controlled to be reduced to a second lower limit value so that the suction performance exceeds the lower limit value and reaches a predetermined low suction performance. 7. Depending on whether or not the suction port is operated at a certain time interval, if there is operation, the suction performance per amount will be cumulatively increased in proportion to the number of operations, and if there is no operation, the suction performance per predetermined amount will be cumulatively decreased. The vacuum cleaner according to claim 1, characterized in that: 8. The vacuum cleaner according to claim 7, wherein an upper limit value for increasing the suction performance and a lower limit value for reducing the suction performance are set. 9. Depending on whether or not the suction port is operated at regular intervals, if there is an operation, the suction performance is controlled to a value that is proportional to the number of operations or a predetermined function, and if there is no operation, the suction performance is controlled at a value that is proportional to the number of operations or a predetermined function. 2. The vacuum cleaner according to claim 1, wherein the vacuum cleaner cumulatively reduces the suction performance by a predetermined function amount. 10. The vacuum cleaner according to claim 9, wherein an upper limit value for increasing the suction performance and a lower limit value for lowering the suction performance are set.