JPH0138498B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vacuum cleaner equipped with a valve device for preventing an excessive rise in temperature of an electric blower and a lamp for notifying the amount of collected dust.

(Prior art) In general, in vacuum cleaners, when the amount of dust collected in the dust collector increases and the air volume of the electric blower decreases, the electric blower overheats. A passage is provided to communicate the sealed space with the outside, and a valve device that responds to the pressure difference is installed in this passage.When the negative pressure in the sealed space increases and the air volume decreases, the valve device opens and allows outside air to flow in. Accordingly, the air volume of the electric blower is increased to prevent the electric blower from overheating (see Japanese Utility Model Publication No. 54-22288).

In addition, conventionally, when the amount of dust collected in the dust collection device reaches a predetermined amount, a lamp for indicating the amount of dust collected is turned on, and this lamp is lit to encourage the disposal of dust. Conventionally, there is no valve system that uses a valve device to prevent excessive temperature rises for control, and in the past, for example, a switch was installed to notify changes in exhaust air volume, and a lamp was turned on when the exhaust air volume fell below a predetermined amount. (Refer to Utility Model Publication No. 38-19228).

(Problem to be Solved by the Invention) Conventionally, when a vacuum cleaner is equipped with a valve device for preventing excessive temperature rise and a lamp for notifying the amount of collected dust, the valve device, the lamp, and the control device are required. It is necessary to individually incorporate devices such as switches into the vacuum cleaner main body, which makes the assembly work of the vacuum cleaner main body complicated and increases the cost.

However, in the present invention, the above-mentioned problems are solved by controlling the lamp for indicating the amount of dust collected by using the movement of the valve body of the valve device, and by assembling the valve device and the lamp, etc. It is.

(Means for Solving Problems) The content of the present invention is to connect a pressure detection passage (in the illustrated embodiment, a negative pressure passage 10 and an atmospheric pressure a side passage 11), a valve device in the passage that opens and closes depending on the pressure difference between the sealed space and the outside, and a valve device in the dust collector in the dust collector. In a vacuum cleaner equipped with a lamp that indicates that the amount of collected dust has reached a predetermined amount, a magnet is provided on the valve body of the valve device, and a reed switch that controls the lamp is fixed on a board that fixes the lamp. The circuit board is attached to the valve device, the magnet and the reed switch are arranged in a predetermined positional relationship, and the reed switch is controlled by the magnet that responds to opening and closing of the valve body.

(Function) In the above configuration, as the amount of dust collected in the dust collector increases, the negative pressure in the closed space increases and the air volume decreases. Eventually, when the amount of dust collected reaches a predetermined amount, the pressure difference between the closed space and the outside expands to more than a predetermined value, and as a result, the valve element of the valve device opens, and at the same time, the magnet that responds to the valve element opens the valve. Close the reed switch and turn on the lamp.

Therefore, while outside air flows in through the valve device, the air volume of the electric blower increases and excessive temperature rise is prevented, the lighting of the lamp prompts the user to throw away the dust.

In addition, by fixing the lamp and reed switch on the same board and attaching the base to the valve device, they can be assembled into an assembly. The assembly work for the machine body is simplified, and the structure of the machine body is also simplified.

(Embodiment) In FIG. 1, reference numeral 1 denotes a vacuum cleaner body consisting of a front body 3 equipped with a dust collector 2, an electric blower 4, and a rear body 6 equipped with a cord reel 5. Reference numeral 7 denotes a valve device provided in the vacuum cleaner body 1, which opens and closes by detecting the pressure inside the vacuum cleaner body 1, which changes depending on the amount of dust collected. A valve body 13 with a magnet 12 attached between the negative pressure passage 10 and the atmospheric pressure side passage 11 connected by
A board 15 on which a reed switch 14 and a lamp 16 are fixed is arranged on top (see FIGS. 2 and 3). This reed switch 14 moves the valve body 13 downward when more than a predetermined amount of dust accumulates in the dust collector 2, that is, when the negative pressure in the space 8 increases due to the electric blower. It is designed to be closed by a magnet 12.
In addition, when the electric blower 4 is stopped or the electric blower 4
Even if the dust collector 2 is driven, if a predetermined amount or more of dust has not accumulated in the dust collector 2, the valve body 13 is positioned upward by the spring 17, and the reed switch 14 is not closed.

In addition, the electric blower 4 is cooled by sucking dust and using clean air filtered by the dust collector 2, but the amount of dust sucked increases and the dust collector 2
If the air blower becomes clogged, the air volume will decrease and the electric blower 4
The cooling effect becomes worse. However, since the area of the joint between the valve body 13 and the valve support body 18 is set large, the movement of the valve body 13 causes atmospheric air to flow in as shown by the arrow, cooling the electric blower 4 and preventing excessive temperature rise. can be done. That is, as shown in FIG. 2, the lower end of the valve body 13 is shaped like a pot lid, and the magnet 12 is provided at the tip of the central protruding rod. The valve support body 18 is made of a cylindrical elastic material, and has a rib-shaped guide 18a formed on its inner periphery. The valve body 13 is inserted into the valve support 18 so as to be vertically slidable along the guides 18a. This valve body 13 is always urged upward by a spring 17, and the opening 18b of the valve support body 18
is blocked. When the valve body 13 descends against the urging force of the spring 17, the hole 18b opens and outside air flows in through the gap between the ribs 18a as shown by the arrow. Since the diameters of the hole 18b and the valve support body 18 are quite large, a large amount of air can flow in through the hole 18b to cool the electric blower 4. Note that A is the angle for attaching the board 15 to the valve device 7 and assembling them.
The magnet 12 and reed switch 14 are attached so as to have a predetermined positional relationship.

When the negative pressure in the space 8 increases, the reed switch 14 closes and the lamp 16 lights up.The lamp 16 is powered by the voltage (usually 500W class) across the stator winding 19 of the electric blower 4 (see Figure 4). 12 for electric blower
~14V), a low-voltage yet bright lamp can be obtained without the need for a transformer. The lamp 16 is a so-called fuse type lamp and is used to display oil in automobiles. This lamp 16 operates at about 14V and 150mA
Although it requires a certain amount of current, it can provide about 10 times the amount of light as a neon lamp.

Now, to explain the operation of the present invention, when the electric blower 4 is driven and the suction operation is started,
When the amount of dust in the dust collector is less than a predetermined amount, the negative pressure in the vacuum cleaner body 1 is not so large and the valve body 13 is in close contact with the valve support 18 by the spring 17, so the reed switch 14 is not closed. However, when more than a predetermined amount of dust accumulates in the dust collector, the pressure difference becomes large and the valve body 13 slides downward, closing the reed switch 14. Then, the lamp 16 connected to the stator winding 19 of the electric blower 4 is turned on to notify that it is time to throw away the garbage, and atmospheric air flows into the electric blower 4 to provide a cooling effect.

As described above, the above embodiment has the effect of increasing the cooling effect of the electric blower at the same time as the pressure switch detects the pressure inside the vacuum cleaner body that changes depending on the amount of dust collected, and lights the lamp. It does not require a separate transformer and is inexpensive in terms of cost.
Moreover, it is possible to provide a bright lamp, which is easy for the user to understand, and has the remarkable effect of notifying the user when it is time to throw out the garbage.

(Effects of the Invention) As described above, according to the present invention, by controlling the lamp for notifying the amount of collected dust by using the movement of the valve device for preventing excessive temperature rise, the amount of collected dust is determined to be a predetermined amount. When the temperature reaches the maximum temperature, outside air is allowed to flow in to prevent the electric blower from overheating, and at the same time, a lamp is lit to encourage dust disposal.Furthermore, the valve device, lamp, reed switch, etc. can be assembled into one unit, making it easier to clean the vacuum cleaner itself. Since the vacuum cleaner body can be assembled all at once, and there is no need for individual assembly as in the conventional case, the assembly work of the vacuum cleaner main body can be significantly simplified, and it is also superior in terms of structure and cost.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the structure of a vacuum cleaner according to an embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views and top views showing essential parts of the vacuum cleaner, and FIG. 4 is a circuit diagram of the vacuum cleaner. It is a diagram. 2: Dust collector, 4: Electric blower, 7: Valve device, 8: Closed space, 12: Magnet, 13: Valve body, 1
4: reed switch, 15: board, 16: lamp.

Claims (1)

[Claims] 1. A pressure detection passageway for communicating the sealed space between the electric blower and the dust collector with the outside, a valve device located within the passageway that opens and closes depending on the pressure difference between the sealed space and the outside, and the above-mentioned A lamp is provided to notify that the amount of dust collected in the dust collector has reached a predetermined amount, and a magnet is provided on the valve body of the valve device, and the lamp is controlled on a substrate to which the lamp is fixed. The reed switch is fixed, the board is attached to the valve device, the magnet and the reed switch are arranged in a predetermined positional relationship, and the reed switch is controlled by the magnet that responds to the opening and closing of the valve body. A vacuum cleaner with special features.