JPH06105767A - Control circuit for piping type vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide a piping type vacuum cleaner which can secure the rate of air flow in a piping even though clog is generated with sucked objects or a suction hole and can prevent remaining or stagnation of dust in the piping. CONSTITUTION:A piping type vacuum cleaner is equipped with a rate-of-flow sensor 20 for the air installed in a hose 4 and a valve 21 which can shut the inside of the hose 4 from the outside and generate ventilation. The valve 21 is so arranged that its degree of closing is variable according to the degree of blocking of the suction hole 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an industrial and domestic pipe-type vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, in this type of pipe-type vacuum cleaner, the main body provided with a blower electric motor and a dust collector is a stationary type housed in an outdoor or indoor storage room, storage room, etc. It is something that will not be forgotten. The hose can be cleaned by connecting the hose to the hose insertion port provided in each room and controlling the hand switch on the hose side. Therefore, it is very easy to handle, and the exhaust air does not come out into the room, so it is clean.

[0003]

However, if the control is performed in the same way as the control of the hand switch which is performed in a general floor moving type electric vacuum cleaner, the following problems occur.

That is, the main body and the hose insertion port are guided by pipes, and the length of the pipes varies greatly from 5 to 80 m depending on the size of the house and the floor plan. When the suction force of the vacuum cleaner is reduced by the switch or the suction port is closed, the air flow rate in the pipe is reduced, and the dust in the pipe is often not conveyed to the main body and remains in the pipe. The dust remaining in the pipe is difficult to move from the pipe to the main body dust collecting portion, which causes a problem that the pipe is clogged with dust.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cleaner that does not clog dust in the pipe even when the suction port is closed by the object to be cleaned.

[0006]

In order to solve this problem, the piping type vacuum cleaner of the present invention comprises an air flow sensor inside the hose and a valve capable of opening and venting the inside and outside of the hose. There is.

Furthermore, in the second aspect of the invention, the valve can change the opening degree according to the air flow rate inside the hose.

[0008]

With this configuration, when the suction port is blocked by the object to be cleaned and the air flow rate in the pipe decreases, the air flow rate in the hose also decreases. If the air flow rate detected by the air flow rate sensor falls below a certain value, the valve To increase the air flow rate in the pipe.

Further, according to the second aspect of the invention, since the valve can be changed, the bypass air flow rate can be smoothly controlled by the degree of blockage of the suction port.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a main body of a pipe type vacuum cleaner 1
Has a blower motor 8 and a dust collector 9, and is connected to a pipe 2. A hose insertion port 3 is attached to the tip of the pipe 2 distributed to each room. A shutter 11 is attached to the hose insertion port 3 and is closed when the hose 4 is not inserted. The hose 4 is provided with a hand operation unit 5. The extension pipe 6 and the suction port 7 are attached to the hand operation unit 5. The hand switch 10 is also arranged on the hand operation unit 5.

An air flow sensor 20, a valve 21, and a sensor circuit 22 are arranged in the hand-side operation section 5. The sensor circuit 22 is a circuit for receiving a signal from the air flow sensor 20 and proportionally controlling the opening degree of the valve 21.

The air flow sensor 20 is arranged upstream of the valve 21. Although the air flow sensor 20 is of the hot wire type in this embodiment, it goes without saying that other types such as an ultrasonic type may be used.

The operation of the hot wire type air flow sensor 20 will be described below. When a wind hits a heating wire heated to a certain temperature, the heat is taken away and it is cooled. In order to keep the cooled heat ray at a constant temperature again,
A current for self-heating flows. The current deviation at this time is converted into an air flow rate.

FIG. 2 is a diagram showing the relationship between the degree of blockage of the suction port 7 and the flow rate of air in the valve 21 and the pipe 2 in another embodiment of the present invention.

The operation of the electric vacuum cleaner configured as described above will be described below. A pipe 2 connected to the electric vacuum cleaner body 1 is provided in each room, and a hose insertion port 3 with a shutter 10 is attached to the tip thereof. The shutter 10 of any hose insertion port 3 is opened and the hose 4 is inserted. Next, by operating the hand switch 11 on the hand operation unit 5 of the hose 4, the electric vacuum cleaner body 1
The blower electric motor 9 is operated to suck air together with dust from the suction port 7. The dust-containing air passes through the extension pipe 6, the hose 4 and the pipe 2 to generate dust, which reaches the device 9 where the dust is captured and the clean air is exhausted.

When the suction port 7 is blocked by a cloth or the like to be cleaned and the passing air flow rate decreases during cleaning, the air flow rate sensor 20 detects it, and the sensor circuit 22 causes the valve 2 to operate.
1 is opened to increase the air flow rate in the pipe 2.

Further, the valve 21 has its opening degree varied according to the degree of blockage of the suction port 7 so that the air flow rate in the pipe 2 becomes a constant amount (for example, 0.5 m ^{3 /} sec) or more.

As described above, according to this embodiment, the hose 4
By providing the air flow rate sensor 20, the valve 21, and the sensor circuit 22 in the, by-pass air flows into the pipe 2 from the valve 21 even if the suction port 7 is blocked by the cloth or the like to be cleaned, and the air flow rate in the pipe 2 is reduced. It is possible to secure and prevent the accumulation of dust.

Further, since the opening degree of the valve 21 is changed according to the degree of blockage of the suction port 7, smooth operation can be achieved.

[0021]

As is apparent from the above description of the embodiments, according to the present invention, in a house-installed pipe type vacuum cleaner, a hose connected to a hose insertion port provided in each room By providing the air flow rate sensor and the valve capable of ventilating the inside and outside of the hose inside, it is possible to prevent clogging of dust and retention in the pipe even when the suction port is blocked by the object to be cleaned.

Further, according to the second aspect of the invention, since the opening degree of the valve is changed according to the closing degree of the suction port, smooth operation can be achieved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a pipe-type vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram showing the operation of another embodiment of the present invention.

[Explanation of symbols]

 1 Vacuum cleaner body 2 Piping 3 Hose insertion port 4 Hose 5 Hand operation part (included in hose 4) 6 Extension pipe 7 Suction port 8 Blower electric motor 9 Dust collector 10 Hand switch 11 Shutter 20 Air flow sensor 21 Valve 22 Sensor circuit

Claims (2)

[Claims] 1. A pipe-type vacuum cleaner incorporated into a house, wherein an air flow rate sensor is provided inside a hose or extension pipe connected to a hose insertion port provided in each room, and inside the hose or extension pulp. A control device for a pipe-type vacuum cleaner, comprising: a valve capable of opening and ventilating the outside. 2. The control device for a pipe-type vacuum cleaner according to claim 2, wherein the valve has a variable opening degree according to the degree of blockage of the suction port.