JPH0321214A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent a temperature rise to enhance the safety by providing, one the blow-off side of an incorporated fan motor, a temperature protector made of temperature sensing ferrite, which detects a temperature of blow-off air so as to open and close an opening formed in the body of a vacuum cleaner. CONSTITUTION:A temperature protector 8 is mounted in an opening 9 formed in a body 1, corresponding to an blow-off passage of a fan motor chamber 5, and has a temperature sensing ferrite plate 11 which is removably coupled to a permanent magnet 10 secured at the periphery of the opening. When a paper bag 2 is fully filled with dust during operation, the volume of air sucked from a suction member decreases so that the temperature T of blow-off air becomes high. If T=T0, the magnetic force of the temperature sensing ferrite plate 11 disposed in the blow-off passage decreases so that the binding force between itself and the permanent magnet 10 decreases. Accordingly, it is moved downward by the urging force of a spring 12, resulting in opening of the opening 9 so that the blow-off air flows through the opening 9 and is then discharged to the outside of the body 1. Further, when the temperature sensing ferrite plate 12 is moved, a switch 15 is actuated so that a power source for the fan motor 4 is turned off to interrupt the operation of the vacuum cleaner.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to household electric cleaners (1), in particular to temperature protectors thereof.

BACKGROUND OF THE INVENTION Conventionally, this type of vacuum cleaner has an M4 type vacuum cleaner as shown in FIGS. 7 and 8. In FIGS. 7 and 8, a temperature protector 42 is provided in a dust collection chamber 41 provided at the front of the vacuum cleaner body, and this temperature protector 42 is connected to an opening provided in the front wall of the dust collection chamber 41. A lid 44 that opens and closes the lid 43 and a spring 45 that biases the lid 44 toward the opening 43.
When the paper bag 46 is full of garbage, the dust collection chamber 41
The internal pressure is lowered, and the force greater than the biasing force of the spring 45 is increased.
4 moves, the opening 43 becomes open, and air flows into the dust collection chamber 41 from the outside.

Problems to be Solved by the Invention However, with such a structure, the pressure inside the collecting rIJ chamber 41 is detected, but when dust accumulates in the M bag 46, the suction tool into the dust collecting chamber 41 The air inflow from the cotton removal machine becomes smaller, the temperature of the exhaust air increases, and the
There is a problem in that the exhaust side may be thermally deformed by exceeding the allowable temperature limit of the WB material.

The present invention has been made to solve these conventional problems, and an object of the present invention is to provide a vacuum cleaner equipped with a temperature protector designed to improve safety.

Sl! ! Means for Solving the Problems In order to solve the above problems, the vacuum cleaner of the present invention has an opening provided on the exhaust side of the built-in fan motor that detects the exhaust temperature and opens and closes the opening provided in the main body of the electric cotton remover. It is equipped with a temperature protector made of operating temperature-sensitive ferrite.

Effect With the above configuration, during cleaning work, when the paper bag becomes full of debris and the suction fffffi from the suction tool decreases, the exhaust temperature rises, and the exhaust temperature is set at a certain constant temperature below the heat resistance temperature of the resin. When the temperature rises above, the magnetic force of the temperature-sensitive ferrite, which is the actuator of the temperature protector, disappears and the elastic body moves relative to the biased direction, causing the opening provided on the exhaust side to ffll. The passage is widened, the flow of exhaust air becomes smoother, temperature rise can be suppressed, and the vacuum cleaner body made of resin parts does not deform due to heat, improving safety.

It is also a temperature protector operating element! When the magnetic force of the ig ferrite disappears, the integrated operator moves by moving relative to the direction biased by the elastic body, and the opening provided in the dust collection chamber is opened. , 8i It is possible to prevent outside air from flowing into the dust chamber and increase the temperature inside the vacuum cleaner, and the vacuum cleaner body made of resin parts is not thermally deformed, thereby improving safety.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

FIG. 1 is a sectional view of a vacuum cleaner according to an embodiment of the present invention, and FIG.
Figures 1 and 3 are enlarged cross-sectional views of essential parts for explaining the operation of the vacuum cleaner. This is the main body of the machine, and the front part of the wooden body 1 is provided with a dust collection chamber 3 in which a paper bag 2 is attached, and the rear part is provided with a fan motor chamber 5 in which a fan 71 and a fan 4 are kept. The fan motor 4 is air-tightly attached to the partition wall 7 between the dust collection chamber 2 and the fan motor chamber 5 by an elastic motor revolver 1 and rubber 6. It is attached to an opening 9 provided in the main body 1 corresponding to the exhaust passage of the motor chamber 5.
It has a temperature-sensitive ferrite 11 that is detachably coupled to a permanent magnet 10 fixed around the TnD section. this! l
The temperature of the hot ferrite 11 is To (the heat-resistant temperature of the resin is T
1, the structure is such that the magnetic force decreases when To<11>, and the opening 9 is held by the spring 12 having a spring force weaker than the bonding force between the permanent magnet 10 and the temperature-sensitive ferrite 11. It is biased in the direction of opening and is normally in the position shown in FIG. A base 13 holds the spring 12, and is provided with a vent 14 communicating with the exhaust passage. Further, the base 13 is provided with a switch section 15, and the temperature-sensitive ferrite 11 causes the spring 12 to become
The fan motor 4 is electrically connected in series to a control circuit 16 that controls the fan motor 4.

When this control circuit 16 is operated by the switch section 15, fl! to (for example, to is set within 15 minutes), then turn off the power to the fan motor 4.
is configured to do so.

In this actual box example, temperature-sensitive ferrite 11 can be used.
Although the permanent magnet 10 was installed on the fixed side, it is also possible to install the permanent magnet on the movable side, in short, by using a thirst-sensitive light,
Any configuration that detects temperature may be used.

Next, the operation of the above configuration will be explained. When the paper bag 2 becomes full of garbage during sweeping work, the exhaust air temperature T rises as the suction air volume from the suction device decreases, and T=To.
When this happens, the magnetic force of the temperature-sensitive ferrite 12 installed in the exhaust passage decreases, and the bonding force with the permanent magnet 10 weakens, so it moves downward due to the biasing force of the spring 12 and comes to the position shown in FIG. . Therefore, the opening 9 is opened and the exhaust gas is exhausted out of the main body 1 through the opening 9. Further, when the temperature sensing light 12 moves, the switch section 15 operates and the power to the fan motor 4 is turned off after to time.
The vacuum cleaner will stop operating.

FIG. 4 is a sectional view of a vacuum cleaner according to another embodiment of the present invention, and FIGS. 5 and 6 are enlarged sectional views of essential parts for explaining the operation of the same vacuum cleaner. In Figures 4 to 6, 2
Reference numeral 1 denotes the outer shell of a vacuum cleaner.-4 A cotton removing machine main body, a dust collection chamber 23 equipped with a paper bag 22 is provided at the front of the main body 21, and a fan motor chamber holding a fan motor 24 is provided at the rear. 25 are provided.

The fan motor 24 is tightly attached to a partition wall 27 between the dust collection chamber 22 and the fan motor chamber 25 by means of an elastic motor sabot rubber 26. The temperature protector 28 is connected to the supply wall 2 in the exhaust passage of the fan motor chamber 25.
Permanent magnet 3 attached to 7 and fixed to the stocking wall 27
It has a temperature-sensitive ferrite 31 that is detachably coupled to 0. This temperature-sensitive ferrite 31 has a temperature To as described above.
(Assuming the heat-resistant temperature of the resin is 11, To<TI is set), the magnetic force decreases, and the spring has a spring force weaker than the bonding force between the permanent magnet 30 and the temperature-sensitive ferrite 31. 32 in a direction away from the permanent magnet 30, and is normally in the position shown in FIG. 3
Reference numeral 3 designates a base that holds this spring 32, and is provided with a vent hole 34 that communicates with the exhaust passage and through which the exhaust gas passes. Reference numeral 35 denotes an operator integrally attached to the temperature-sensitive ferrite 31, which is made of resin parts, etc., and extends toward the dust collection chamber 23 through a member passage hole 36 provided in the supply wall 27. The dust collection chamber 2 is connected to the operator 35 in the through hole 36.
3 and the fan motor chamber 25 are provided with a packing 37 for airtightly sealing the fan motor chamber 25. 38 is an opening provided in the wooden body 21 corresponding to the dust collection chamber 23, and normally the operator 35
It is configured so that the lid can be closed by.

The end of the operator 35 is held by the fitting part 39 and the opening 38
It is designed to ensure the benefit of the public.

In the embodiment, the temperature-sensitive ferrite 31 is on the movable side and the control element 35 is attached to it, but the permanent magnet 30 may be made on the movable side and the control element is attached to it. Any configuration that can detect this will suffice.

Next, the operation of the above configuration will be explained. When the paper bag 22 becomes full of gourd during the removal work, the exhaust air temperature T rises as the suction air from the suction tool decreases, and T=T.
o, the magnetic force of the temperature-sensitive ferrite 31 placed in the exhaust passage decreases, and the bonding force with the permanent magnet 30 weakens.
The temperature-sensitive ferrite 31 moves due to the biasing force of the spring 32,
Come to the position shown in Figure 6. Therefore, temperature-sensitive fly 1
-31 is also moved, and the opening 38 provided in the dust collection chamber 23 is opened, allowing air to flow into the dust collection chamber 23 from outside the vacuum cleaner. This acts to lower the exhaust gas temperature T.

Effects of the Invention As described above, according to the present invention, if a temperature protector is provided on the exhaust side to detect the exhaust temperature using a temperature-sensitive ferrite, and its operating temperature To is set to below the heat-resistant temperature T1 of the resin,
Heat resistance f: A The opening provided in the vacuum cleaner body is opened before the temperature reaches T1 to prevent thermal deformation of the fan motor chamber of the vacuum cleaner due to a rise in exhaust temperature, thereby improving safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a vacuum cleaner showing an embodiment of the present invention;
2 and 3 are enlarged sectional views of main parts for explaining the operation of the electric vacuum cleaner, FIG. 4 is a sectional view of a vacuum cleaner showing another embodiment of the present invention, and FIG. 5 6 is an enlarged sectional view of the main parts to explain the operation of the same vacuum cleaner, FIG. 7 is a sectional view of a conventional electric vacuum cleaner, and FIG. 8 is the same main part of the conventional vacuum cleaner. It is an enlarged view of the part. 1.21... Vacuum cleaner body, 2.22... Paper bag, 3.
23... Dust collection chamber, 4.24... Fan motor, 5.
25...Fan motor chamber, 8, 28...Temperature protector, 9゜゜゜opening, 10j...Permanent magnet, 11.
...@Temperature ferrite, 12...Spring, 30...Permanent magnet, 31...Temperature-sensitive ferrite, 32...Spring, 3
5... Operator, 36... i through hole, 38... opening.

Claims (1)

[Claims] 1. The exhaust side of the fan motor built into the vacuum cleaner body is equipped with a temperature protector that detects the exhaust temperature using a temperature-sensitive ferrite and opens and closes an opening provided in the vacuum cleaner body. vacuum cleaner. 2. An opening is provided on the exhaust side of the vacuum cleaner body, and a temperature-sensitive ferrite and a permanent magnet that detect the exhaust temperature and vary the magnetic force are used as a fixed side and the other as a movable side that opens and closes the opening. and a temperature protector configured such that its movable side is biased in the direction of opening the opening by an elastic body made of a spring or the like having a force weaker than the bonding force between the permanent magnet and the temperature-sensitive ferrite. Vacuum cleaner. 3. An opening is provided on the dust collection chamber side of the vacuum cleaner body, and a temperature-sensitive ferrite and a permanent magnet that detect the exhaust temperature and vary the magnetic force are configured, one on the fixed side and the other on the movable side. An operator that extends toward the dust collection chamber and opens and closes the opening is integrally attached to the movable side, and the movable side is made of an elastic material such as a spring whose force is weaker than the bonding force between the permanent magnet and the temperature-sensitive ferrite. A vacuum cleaner comprising a temperature protector configured to be biased by the body in a direction to open the opening.