JPH0465683B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vacuum cleaner using a non-commutator motor as a drive source for a vacuum fan, particularly vacuum cleaners for stores, commercial use, and central cleaners. be.

Conventional technology This type of vacuum cleaner for stores, commercial use, etc.
A high degree of vacuum is required, and therefore commutator motors, which can easily rotate at high speed, have been generally used as the drive source for vacuum fans.

Problems to be Solved by the Invention However, a drawback of this commutator motor is that it requires a commutator and brushes.

The brushes are worn out due to contact with the commutator, and their lifespan is generally about 500 to 1000 hours, and if the brush is used for longer than that, it will be necessary to replace the brushes. Naturally, the commutator also wears out, and generally, if the brushes are replaced twice, the commutator will almost reach the end of its service life, and if the motor is to be used for any longer than that, the motor itself must be replaced.

For this reason, the above-mentioned maintenance is required for products that are used frequently and for a long period of time, such as those used in stores and businesses, which poses problems such as being troublesome and increasing costs.

In addition, central cleaners are often installed under floors or in storerooms, making maintenance themselves difficult.

The present invention solves these conventional problems and provides a highly reliable vacuum cleaner that requires virtually no maintenance.

Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention provides a dust box that is open at the top and has a suction port formed in a part of the peripheral wall, and a dust box that can be freely attached and detached from the open upper part of the dust box. A fan motor is installed above the dust box and includes a non-commutator motor and a fan section driven by the non-commutator motor. Mainly the vacuum cleaner installed,
A part of the vacuum cleaner has an intake port for cooling air, and is provided at a distance above the main body of the vacuum cleaner, and contains a container in which a control circuit for driving the commutatorless motor is installed, and a dust box. The air protector is attached to the bulkhead of the vacuum cleaner that closes the upper opening and communicates with the container through a cooling air introduction path, and the air protector is located downstream of the dust collection filter in the dust case. It consists of a valve seat that opens into the valve seat, and a valve body that is biased toward the valve seat via a spring, and further has a vent hole formed in the valve body.

Effect In the above configuration, when the fan motor is in operation, not only air that has passed through the dust collection filter but also air that has bypassed the filter is sucked into the fan section. The bypass air flows from the container to the air protector communicated via the cooling air introduction path, and in the flow process, the control circuit for driving the commutatorless motor is cooled. The vent holes in the valve body of the air protector function to regulate the amount of bypass air to the minimum necessary for cooling the drive control circuit, and to prevent a decrease in dust collection efficiency by the filter as much as possible. Of course, if the dust filter becomes clogged and the degree of vacuum on the suction side of the fan reaches a predetermined value, the valve body of the air protector will fully open.

Embodiments Hereinafter, embodiments will be described with reference to the accompanying drawings.

In FIG. 1, a vacuum cleaner main body 2 is placed on top of a dust box 1, and a container 3 is further placed on top of this vacuum cleaner main body 2.

The dust box 1 has an upwardly open shape, and a suction port 4 is formed in a part of the peripheral wall. The dust collection filter 5 located in a concave shape inside the dust box 1 is
The opening part is dust box 1 and vacuum cleaner main body 2
It is held between the partition wall 6 and the expander 7, and its shape is maintained by the expander 7.

A fan motor 8 is installed inside the main body 2 of the vacuum cleaner and is supported in a vibration-proof manner with the fan portion 9 facing downward. The motor 10 that is the drive source for the fan section 9 is of a non-commutator type.

Further, the container 3 is located above the main body 2 of the vacuum cleaner at a distance, and contains a control circuit 11 for driving the commutatorless motor 10.

Reference numeral 12 indicates a cooling air intake port formed on the top surface of the container 3, and reference numeral 13 indicates an air protector.

The air protector 13 is a vacuum cleaner main body 2.
a valve seat 14 that is attached to the partition wall 6 of the valve seat 14 and whose lower opening faces the inside of the dust collection filter 5, that is, the downstream side;
The valve body 16 is configured to open and close the valve seat 14 and is biased in the closing direction by a spring 15, and a valve frame 17. The valve body 16 further includes a vent hole 1.
8 is formed.

The bottom of the container 3 and the valve seat 14 of the air protector 13 are communicated through a cooling air introduction path 19.

In the above configuration, dust-containing air is sucked as shown in A from the suction port 4 during normal cleaning work.
This dust-containing air is filtered when passing through a dust collecting filter 5, and separated dust is collected in a dust box 1. On the other hand, the purified air flows through the fan section 9 and the commutatorless motor 10, reaches the vacuum cleaner main body 2, and is discharged from a predetermined exhaust section.

At the same time, the valve body 1 in the air protector 13
The suction force of the fan unit 9 works through the ventilation holes 18 of 6 to cause the container 3 → cooling air introduction path 19 → air protector 13 → fan motor 8 and external air (arrow B)
will be introduced. Therefore, the drive control circuit 11 of the commutatorless motor 10 facing inside the container 3 is effectively cooled by the external air flow.

The external air introduced through the air protector 13 is a bypass that does not pass through the dust collection filter 5, and is unrelated to dust collection. However, the amount is regulated by the vent hole 18 of the valve body 16, and is designed to be sufficient for cooling the drive control circuit 11 and not to have much effect on the dust collection efficiency of the dust collection filter 5. .

Of course, if the dust filter 5 becomes clogged and the degree of vacuum exceeds a predetermined value, the valve body 16
The valve seat 14 is fully opened by overcoming the spring 15, and the bypass air amount is increased.

Effects of the Invention As described above, since the present invention is equipped with a fan motor using a non-commutator motor, no maintenance is required even during long-term use, and the drive control circuit is effectively cooled. This temperature rise can be prevented and reliability can be significantly improved. In particular, the container that constitutes the cooling space for this drive control circuit is located separately from the main body of the vacuum cleaner and at a distance from the main body of the vacuum cleaner, so it is located in a place where it will not be affected by the heat from the fan motor. This allows the drive control circuit to be cooled even more reliably.

In addition, this drive control circuit cooling air can be set to the minimum amount necessary, so it does not have a negative effect on the dust collection characteristics of the vacuum cleaner. If the air protector exceeds this value, the air protector will fully demonstrate its original function.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a vacuum cleaner showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of an air protector portion. 1...Dust box, 2...Basic vacuum cleaner, 3
... Container, 4 ... Suction port, 5 ... Dust collection filter, 6 ... Partition wall, 8 ... Fan motor, 9 ... Fan section, 10 ... Commutatorless motor, 11 ... Drive control circuit, 12...Intake port, 13...Air protector, 14...Valve seat, 15...Spring, 16
...Valve body, 18...Vent hole.

Claims (1)

[Claims] 1. A dust box that is open at the top and has a suction port formed in a part of the peripheral wall; a dust collection filter that is detachably attached to the open upper part of the dust box and faces the inside of the dust box; The main body of the vacuum cleaner is equipped with a fan motor, which consists of a non-commutator motor and a fan section driven by the non-commutator motor, and a part of the vacuum cleaner has an intake port for cooling air. They are provided at intervals above the main body of the vacuum cleaner,
Inside, there is a container in which a control circuit for driving the commutatorless motor is installed, and a container is attached to the main bulkhead of the vacuum cleaner that closes the upper opening of the dust box, and is communicated with the container via a cooling air introduction path. The air protector includes a valve seat that opens downstream from the dust collection filter in the dust case, and a valve body that is biased toward the valve seat via a spring. A vacuum cleaner with ventilation holes formed in its body.