JPS58124420A - 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 The present invention relates to a vacuum cleaner that includes an east chamber having a suction port, a filter, and an electric blower.

Conventionally, in this type of vacuum cleaner, it has been seen that an alarm device for notifying an operator of clogging of the filter is provided in the passage between the filter and the electric blower. As the vacuum cleaner is used, the filter becomes clogged and the negative pressure in the passage increases, and an alarm device is activated to notify the operator that the filter is clogged. However, if the suction port is frequently blocked, for example when cleaning a carpet, the negative pressure in the passage becomes high and the alarm system is activated even though the filter is not clogged, causing serious problems. Not only is it noisy, but the operator can't tell if the filter is actually clogged! I couldn't discuss it.

This invention was made based on the above circumstances, and provides an air passage whose one end communicates with the dust collection chamber and whose other end opens to the outside, and provides a sounding body on the open side of the air passage. , in the air passage inside the sounding body,
When cleaning carpets, etc., by installing a valve that closes the air passage when the pressure difference between the dust collection chamber and the outside is above a certain level, and opens the air passage when the pressure difference is less than a certain level. Another object of the present invention is to provide a vacuum cleaner equipped with an alarm device that does not operate unless the filter is clogged.

An embodiment of the present invention shown in FIGS. 1 and 2 will be described below.

FIG. 1 shows a vacuum cleaner, which is composed of a main body case 1 and a dust collection case 2, and the dust collection case 2 is detachably attached to the front surface of the main body case 1. Inside the main body case 1 there is an electric blower 13 and a cord winder @
@4 is R1, and a rear wheel 5 for running is installed outside of it. The front surface of the dust collection case 2 is provided with a suction port 6 to which a hose (not shown) is connected, and the lower surface is provided with a front wheel 7 for running, and the rear opening is provided with a coarse filter 8 and a fine filter. A filter 9 is removably arranged.

In addition, the suction port 6 and the coarse filter 8 in the dust collection case 2
A dust collection chamber 10 is provided between the dust collection meter 1 and
1 communicates with the dust collection chamber 10 through a small hole 10a provided in the front wall of the dust collection case 2.

The dust collecting meter 11 includes a connecting part 11a whose rear end is connected to the dust collecting case 2, a meter part 11b extending downward from the lower surface of the connecting part 11a, and an inner circumferential surface of the meter part 11b that moves up and down. possible pointers 110;
The valve of the present invention is also constituted by the pointer 11C. The connecting portion 11a is provided with a ring-shaped stopper 11d for the pointer 11C at the connecting portion with the meter portion 11b. Further, the meter section 11b is made of transparent synthetic resin so that it can be visually seen from the outside, and an inflow hole 11e is provided at its lower end so that air can flow in from the outside, and a through hole 11f is provided at the lower side of the meter section 11b. is provided, and the meter section 1
1b and the alarm device f12 are communicated. Alarm device 12
A reed 13 is provided as a sounding body.

Further, the dust collection meter 11 and the alarm device 12 are covered by a dust collection meter cover 14, and a plurality of air holes 14a are provided in the upper part of the dust collection meter cover 14, so that air can flow in from the outside. Furthermore, a see-through section 14b made of transparent synthetic resin is provided at the center so that the meter section 11b of the dust collection meter 11 can be visually observed.

In the structure configured as above, the dust collection meter 11
And the operation of the alarm device 12 will be explained. First, when a hose is connected to the suction port 6 and the switch is turned on, the electric blower lll3 is driven and the inside of the dust collection chamber 10 is brought into a negative pressure state, so that dust is sucked in from the suction port 6 along with air. Further, the pointer 11G of the dust collection meter 11 also rises due to the air flow flowing in from the inflow hole 11e, comes into contact with the stopper 11d, and stops at the upper end of the meter section 11b. As a result, the guideline 110
acts as a valve to close the air passage from the through hole 11f through the meter section 11b to the small hole 10a, prevent the alarm device 12 from operating, and confirm through the transparent section 14b that the filter is not clogged. be able to. At this time, even if the suction port 6 is blocked while cleaning a carpet, etc., the negative pressure inside the dust collection chamber 10 will not decrease, so the dust collection meter 11 and alarm device 12 will not malfunction. .

When the vacuum cleaner is used, dust adheres to the coarse filter 8 and the fine filter 9 and the filters become clogged, and the negative pressure inside the dust collection chamber 1o gradually decreases.
The pressure difference between the inside and outside of the dust collection chamber 10 becomes less than a certain level. Then, the pointer 11c descends within the meter section 11b due to its own weight and is located at the lower end, opening the air passage. That is, as shown in FIG. 2, the lead 1 is
3. An air flow path leading to the dust collection chamber 10 is created via the through hole 11f, the meter section 11b, the connecting section 11a, and the small hole 10a.

Then, due to the inflow of air, the reed 13 vibrates and generates a sound, notifying the operator that the filter is clogged. Further, the pointer 11c of the dust collection meter 11 is connected to the dust collection meter cover 1.
The clogging of the filter is displayed through the transparent section 14b of No. 4.

Therefore, in this embodiment, the dust collection meter 11 and the alarm device 112 do not malfunction, and the movement of the pointer 11c of the dust collection meter 11 is due to its own weight and pressure difference, so the structure is simple and inexpensive. It is easy to manufacture, and variations in the operation of the dust collection meter 11 and the alarm 1ij12 are also reduced.

Note that in order to bias the pointer 11c in one direction, the pointer 110
As shown in Fig. 3, there is no problem even if a tension spring 15 is used instead of using the own weight of the dust meter 11. In this case, the 111 dust meter 11 can be installed anywhere, which is very flexible in terms of design. I become nervous.

Further, even if a compression spring is provided on the dust collection chamber 10 side of the pointer 11C in the meter section 11b, the same effect as in the embodiment described above can be obtained.

As described above, the present invention provides an air passage whose one end communicates with the dust collection chamber and whose other end opens to the outside, provides a sounding body on the opening side of the air passage, and provides a sounding body inside the sounding body. By installing a valve in the air passage that closes the air passage when the pressure difference between the room and the outside is above a certain level, and opens the air passage when the pressure difference is less than a certain level, it is possible to prevent carpets, etc. Even when cleaning, the alarm device no longer malfunctions like in the past, and only issues an alarm when the filter actually becomes clogged, so the effects are extremely large, such as being able to clearly recognize clogging.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a vacuum cleaner embodying an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along line A-A in FIG. 1, and FIG. 3 is a diagram showing another embodiment. FIG. 3 is an enlarged sectional view of a main part of an example. Explanation of symbols 6 is a suction port, 8 is a coarse filter, 9 is a fine filter, 10 is a dust collection chamber, 11 is a dust collection meter, 11c is a valve (pointer), and 13 is a sounding body (part). patent applicant

Claims (1)

[Claims] 1. A dust collection chamber having a suction port, a filter, and an electric feeder
m, an air passage having one end communicating with the dust collection chamber and the other end opening to the outside;
A sounding body is provided in the opening flange of the air passage, and the air passage is closed in the air passage inside the sounding body when the pressure difference between the dust collection chamber and the outside exceeds a certain level;
An electric cleaning device characterized by being provided with a valve that opens the air passage when the pressure difference is less than a certain value. 2. The vacuum cleaner according to claim 1, wherein the air passage is made of a transparent or semi-transparent material, and the valve is a dust collection meter that is visible from the outside. 3. The air passage is provided to extend in the vertical direction, and the inner peripheral surface of the air passage can be vibrated up and down, and when the pressure difference is above a certain level, it rises to close the air passage, and 2. The vacuum cleaner according to claim 1, further comprising a valve that lowers due to its own weight to open the air passage when the pressure difference is less than a certain value.