JPH03165727A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To feed the heat generated by a blower into a dust collection chamber and destroy ticks in the dust by reversing the blower while a suction port is blocked by a cover body made of a filter material, and generating an air stream fed through an exhaust port and discharged through the suction port via a blower chamber and the dust collection chamber. CONSTITUTION:An opening section 21 is formed on the front section of a main body case 12, and it is openably closed by a dust collection chamber cover body 13. A nearly cylindrical suction port 25 communicating a dust collection chamber 15 to the outside of a cleaner main body 11 is formed at its center section, and a suction port cover body 26 openably closing the suction port 25 is rotatably supported on the front face of the outside. The suction port 26 is constituted of a frame material 27 made of an elastic body and a spongy filter material 28 fitted on its inner periphery side and having air permeability. An operation switch 41 for controlling an electric motor 36 is provided on the rear of the upper face of the main body case 12, and a pair of interlocking moving contacts 56, 56 are provided. An exhaust cover body 46 openably and airtightly closing part of an exhaust port 17 is rotatably supported by a support shaft 47 on the rear face of the main body case 12.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a vacuum cleaner, and in particular, the present invention relates to a vacuum cleaner that uses heated exhaust air from an electric blower to collect dust in a dust collection chamber. Concerning substances that kill and injure dust mites, etc.

(Prior Art) Conventionally, as described in, for example, Japanese Patent Publication No. 64-7774 or Japanese Patent Application Laid-Open No. 1-119220,
In order to kill insects in the dust collected in the dust collection chamber of the vacuum cleaner, the heated exhaust air from the electric blower is returned to the dust collection chamber to raise the temperature of the dust collection chamber, thereby killing mites. Vacuum cleaners are known that use heat to kill humans. The vacuum cleaner described in Japanese Patent Publication No. 64-7774 has a structure in which an exhaust port is formed in the main body of the vacuum cleaner to which the other end of the hose can be connected, one end of which is connected to the suction port of the main body of the vacuum cleaner. The dust collection chamber is heated by creating a circulating airflow from the electric blower that returns to the electric blower through the exhaust port, hose, suction port, and dust collection chamber. In addition, in the vacuum cleaner described in Japanese Patent Application Laid-open No. 1-119220, a return air path is formed inside the vacuum cleaner itself for returning the exhaust air from the electric blower to the dust collection chamber through the suction port, and The structure is such that the return air path is opened and closed using a shutter that opens and closes the inlet from the outside and a hose that is removably connected to the inlet as a switching valve. The dust collection chamber is heated by creating a circulating air flow that returns to the electric blower through the electric blower.

However, in the structure described in Japanese Patent Publication No. 64-7774, the hose, which is flexible and relatively weak against heat, is exposed to high heat, so that the hose is easily deteriorated and damaged. In addition, in the structure described in JP-A-1-119220, since a return air passage is provided inside the vacuum cleaner body, the vacuum cleaner body becomes large and it is difficult to maintain airtightness.
Exhaust air leaks from the suction port to the outside during normal cleaning, or outside air enters the suction port during circulation of exhaust air, that is, hot air.

(Problem to be solved by the invention) As mentioned above, in a conventional vacuum cleaner.

With hoses that send exhaust air from an electric blower into the dust collection chamber, there is a problem that the hoses tend to deteriorate;
Even with vacuum cleaners that send exhaust air into the dust collection chamber through a dedicated recirculation air path within the vacuum cleaner body, there are problems such as the vacuum cleaner itself becoming larger.

The present invention aims to solve these problems, and uses the heat generated by the electric blower to remove dust in the dust collection chamber without deteriorating the hose or the like and without increasing the size of the vacuum cleaner itself. The purpose of the present invention is to provide a vacuum cleaner that can kill dust mites and the like inside.

Furthermore, the purpose of this vacuum cleaner is to prevent dust from leaking from the dust collection chamber to the outside when the vacuum cleaner is reversed, and to more effectively kill mites and the like.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the former object, the present invention provides a suction port that includes a dust collection chamber and an electric blower chamber therein, communicates the dust collection chamber with the outside, and the electric blower. A vacuum cleaner body having an exhaust port that communicates the chamber with the outside, a dust collection filter built in the dust collection chamber, an electric blower built in the electric blower chamber that communicates with the dust collection chamber, and this electric blower. In the vacuum cleaner, the vacuum cleaner is equipped with a lid made of a filter material having air permeability that freely opens and closes the suction port, and the electric blower is controlled by the switch to control the dust collection chamber side It is possible to switch between a forward rotation state in which an airflow is generated from the electric blower chamber to the electric blower chamber side, and a reverse rotation condition in which an airflow is generated from the electric blower chamber side toward the dust collection chamber side.

Furthermore, in order to achieve the latter objective, a current limiting element is added that is electrically connected in series between the electric blower and its power source when the electric blower is reversed; It may be arranged in the air path including the dust collection chamber and the electric blower chamber in the vacuum cleaner main body, and upstream of the dust collection chamber at the time of the reverse rotation.

(Function) In the vacuum cleaner according to claim 1 of the present invention, during normal cleaning, the switch is operated to operate the electric blower in a normal rotation state and keep the suction port open.

At this time, an airflow is generated that is sucked into the suction port from outside the vacuum cleaner, passes through the vacuum cleaner's dust collection chamber and the electric blower chamber, and is discharged from the exhaust port to the outside of the vacuum cleaner. Dust is sucked in through the suction port and guided into the dust collection chamber, where it is captured by the dust collection filter.

Moreover, the air filtered by this dust collection filter passes through an electric blower in the electric blower room and is discharged from an exhaust port.

On the other hand, when killing mites etc. in the dust accumulated in the dust collection chamber, close the suction port with a lid made of breathable filter material, and operate the switch.
Operate the electric blower in reverse. At this time, contrary to when cleaning, an airflow is generated which is drawn from outside the vacuum cleaner body into the exhaust port, passes sequentially through the electric blower chamber and the dust collection chamber, and is discharged from the suction port to the outside of the vacuum cleaner body. Therefore, air heated by the electric blower is sent into the dust collection chamber as hot air, thereby killing mites and the like in the dust collection chamber. Note that the lid made of filter material that blocks the suction port prevents the dust in the dust collection chamber from leaking out of the vacuum cleaner body through the suction port, and the air filtered by the filter material flows into the vacuum cleaner body. Expelled outside.

Furthermore, in the vacuum cleaner of claim 2, when the electric blower is reversed, a current limiting element is electrically connected in series between the electric blower and its power source, thereby reducing the rotation of the electric blower, Dust in the dust collection chamber is more reliably prevented from leaking out of the vacuum cleaner body via the filter material blocking the suction port. In addition, the current limiting element generates heat when energized, and the heat generated by this current limiting element is transmitted to Because it is located on the side, it is sent into the dust collection chamber along with the airflow, thereby increasing the temperature inside the dust collection chamber and reliably killing mites and the like inside the dust collection chamber.

(Example) Hereinafter, the configuration of an example of the vacuum cleaner of the present invention will be described based on the drawings.

In FIGS. 1 and 2, reference numeral 11 denotes a vacuum cleaner body, and the vacuum cleaner body 11 is composed of a main body case 12, which constitutes most of its outer shell, a dust collection chamber lid 13, and the like. Inside the main body case 12, a dust collection chamber 15 is defined at the front by a ventilation grid 14, and an electric blower chamber 16 is connected to the dust collection chamber 15 through the ventilation grid 14. It is sectioned at the rear. Further, a lattice-shaped exhaust port 17 is formed in the rear surface of the main body case 12 to face the electric blower chamber 16 and communicate the electric blower chamber 16 to the outside of the cleaner main body 11.

Furthermore, an opening 21 is formed in the front part of the main body case 12 facing the dust collection chamber 15;
is closed by the dust collection chamber cover 13 so as to be openable and closable. Further, this dust collection chamber cover 13 is detachably attached to the front surface of the main body case 12. In order to lock the dust collection chamber cover 13 in the closed state, clamps 2 are attached to the front portions of the upper and lower surfaces of the main body case 12.
2 are each pivoted by a support shaft 23, and
Engagement receivers 24 with which these clamps 22 are removably engaged are formed at both upper and lower ends of the dust collecting chamber lid 13, respectively.

Incidentally, one end portion of the dust collecting chamber cover 13 may be pivoted to the cleaner main body case 12. Further, a substantially cylindrical suction port 25 is formed in the center of the dust collection chamber lid 13 to communicate the dust collection chamber 15 to the outside of the cleaner body 11.

Furthermore, a suction port 2S is provided on the outer front surface of the dust collection chamber lid body 13.
A suction port cover 26, which is located near the top of the suction port 25 and closes the suction port 25 in an openable and closable manner, is rotatably supported with the front-rear direction as the rotation axis direction. Note that this suction port cover body 26 may be supported so as to be vertically slidable. The suction port cover body 26 is made up of a frame material 27 made of an elastic material or the like, and a sponge-like filter material 28 having air permeability attached to the inner circumferential side of the frame material 27. When the filter material 26 is rotated toward the suction port 25, the filter material 28 is positioned facing the suction port 25 from the front.

Further, a limit switch 29 is provided on the outer front surface of the dust collection chamber cover 13, located near the lower part of the suction port 25. The limit switch 29 has a switch 30 that projects upward and is biased upward, and is turned off when the switch 30 is raised and turned on when it is lowered.

Further, the opening/closing element 30 is pressed down by the suction port cover body 26 that has descended to close the suction port 25 .

In addition, a dust collection bag 3 as a dust collection filter is inserted into and removed from the dust collection chamber 15 of the vacuum cleaner main body 11 through the opening 21! is attached removably.

This dust collection bag 31 is a bag-like filter material 3 having air permeability.
2 and a mouth frame 33 glued to the opening side of the bag-like filter material 32, and the rear end of the suction port 25 is removably inserted into the opening of the mouth frame 33. The outer periphery of the mouth frame 33 is detachably held between the front surface of the main body case 12 and the dust collection chamber cover I3.

Furthermore, a rotary electric blower 36 is disposed within the electric blower chamber 1G of the main body case 12. This electric blower 3
6 consists of an AC series-wound commutator motor 37, a fan (not shown) rotationally driven by this motor 37, and an annular fan cover 38 that covers this fan, and a rubber support 39 at the front and rear. .40.

And, the electric blower chamber is secured by the annular front rubber support 39! The intake side and exhaust side of the electric blower 36 are airtightly partitioned within the dust collection chamber 15 and the exhaust port 17, respectively.

Furthermore, an operation switch 41 for controlling the electric blower 36 is provided at the rear of the upper surface of the main body case 12 . This operation switch 41 is operated by the user. Furthermore, a power cord 42 with a plug is led out from the lower rear surface of the main body case 12, and is detachably connected to an external AC power source and supplies power to the electric blower 36. In addition, a deceleration resistor 43 as a current limiting element is disposed at the lower part of the electric blower chamber 16 that forms an air path from the suction port 25 to the exhaust port 17 together with the dust collection chamber 15 within the vacuum cleaner main body jl. has been done.

Furthermore, the main body case! On the rear surface of the exhaust port 2, an exhaust port cover 46 that airtightly closes a part of the exhaust port 17 thereon is rotatably supported by a support shaft 47 with the front-rear direction as the rotation axis direction. Note that a knob 48 is provided on the free end side of the exhaust port cover body 46.

51 is a suction hose, and one end of this hose 51 has a connecting pipe 52 that is detachably connected to the suction port 25.
is provided. Although not shown, a suction port body is detachably connected to the other end of the hose 51 via an extension pipe.

Next, the electric blower 36 is placed in a forward rotation state in which an airflow is generated from the dust collection chamber 15 side to the electric blower chamber 16 side, and in a reverse rotation state in which an airflow is generated from the electric blower chamber 16 side in the dust collection chamber 15 side. The structure of the electric circuit for enabling switching will be explained with reference to FIGS. 3 to 5.

The operation switch 41 has a pair of interlocking movable contacts 56.
．． 57 and these movable contacts 56.5
7 are in contact with each other in a movable manner. Two pairs of fixed contacts 58.
59.60.61. When one movable contact 56 contacts the fixed contact 58, the other movable contact 57 contacts the fixed contact 6o, and when one movable contact 56 contacts the fixed contact 59, the other movable contact 57 contacts the fixed contact. 61, and when one movable contact 56 is not in contact with any fixed contact 58.59, the other movable contact 57 also does not contact the fixed contact 60.61.

The fixed contact 58 is connected to one pole of the power cord 42 which is connected to both poles of the AC power supply, and the limit switch 29 and the deceleration switch are connected between the fixed contact 58 and the fixed contact 61. A resistor 43 is connected in series. Also, both rotating contacts 56.5 of the operation switch 41? In between is the electric motor 3 of the electric blower 36.
7 field coils 62 are connected. Further, a timer switch 63 is connected between the fixed contacts 59 and 60. This timer switch 63 is turned off when a predetermined period of time has elapsed after the start of energization. Further, the electric motor 37 is connected between the fixed contact 60 and the other pole of the power cord 42.
A rotor 64 is connected thereto.

Next, the operation of the above embodiment will be explained.

As shown in FIG. 3, the movable contact 56 of the operation switch 41
．． 57 is away from all the fixed contacts 58, 59, 60, 61, no current flows through the motor 37 of the electric blower 36, so the electric blower 36 is stopped.

During normal cleaning, the suction port cover 26 is rotated upward to open the suction port 25, and the connection pipe 52 of the hose 51 is connected to the suction port 25, as shown in FIG. Further, a suction port body is connected to the other end of the hose 51 via an extension pipe. Furthermore, the exhaust port cover body 46 is rotated downward to open all the exhaust ports 17. In addition, the suction port 25
In the open state, the suction port cover body 26 rises and separates from the switch 30 of the limit switch 29, thereby turning off the limit switch 29.

Then, as shown in FIG. 4, by operating the operation switch 41, the movable contacts 56, 57 are connected to the fixed contacts 58, 57 on the A side.
60, current flows from the field coil 62 of the electric motor 37 to the rotor 64, the rotor 64 rotates in the forward direction, and the fan of the electric blower 36 also rotates in the forward direction. By operating the electric blower 36 in the forward rotation state, air is sucked from the outside into the suction port body, and is passed through the extension pipe, hose 51, dust collection chamber 15 in the vacuum cleaner body II, ventilation grid 14 and electric blower chamber 16 in this order. Pass sequentially through exhaust port 17
An airflow is generated that is discharged from the vacuum cleaner body 11 to the outside. This airflow sucks dust through the suction port, guides it into the dust collection chamber 15 through the extension pipe and hose 51, and traps it in the dust collection bag 31 of the dust collection chamber 15. on the other hand,
The air filtered by the dust bag 31 passes through the electric blower 36 in the electric blower room 16 and is sent out from the exhaust port 17. In addition, depending on the operation, the electric motor 3 of the electric blower 36
7 generates fever.

In addition, when killing mites and the like in the dust accumulated in the dust collection bag 31, immediately after cleaning, as shown in FIG. The suction port cover body 26 is rotated downward to cover and close the suction port 25 with the suction port cover body 26. Further, the exhaust port cover 4G is rotated upward to airtightly close a portion of the upper exhaust port 17 with the exhaust port cover 46.

Note that when the suction port 25 is closed, the lowered suction port cover body 26 presses the switch 30 and turns on the limit switch 29.

Then, as shown in FIG. 5, by operating the operation switch 41, the movable contacts 56, 57 are connected to the fixed contacts 59, 57 on the B side.
61 respectively, the limit switches 29,
Motor 3 via resistor 43 and timer switch 63
Current flows from the field coil 62 of No. 7 to the rotor 64, causing the rotor 64 to rotate. However, since the polarity of the field coil 62 is reversed from the normal rotation state, the rotor 64 rotates. rotates in the opposite direction, and therefore the fan of the electric blower 36 also rotates in the opposite direction. At the same time, since the deceleration resistor 43 is electrically connected in series between the electric motor 37 and its power source, the voltage applied to the electric motor 37 is lower than during normal rotation, and the electric blower 36
rotation becomes lower.

By operating the electric blower 36 in the reversed state, air is sucked into the exhaust port 17 from outside the vacuum cleaner main body 11 and passes through the electric blower chamber 16, the ventilation grid 14, and the dust collection chamber 15 in this order, contrary to the cleaning operation. As a result, an airflow is generated which is discharged from the suction port 25 to the outside of the vacuum cleaner main body II. Therefore, the electric blower 36
Air heated by the electric motor 37 is sent into the dust collection chamber 15 as hot air. In this way, the heat generated by the electric motor 37 is transferred into the dust collection chamber 15, the temperature inside the dust collection chamber 15 rises, and the pests such as mites in the dust inside the dust collection bag 3I are killed and injured by the heat. Ru.

At this time, the suction port cover 26 that closes the suction port 25 prevents the dust in the dust collection bag 31 from blowing out of the vacuum cleaner body 11 through the suction port 25, and the filter material 28 of the suction port cover 26 Only the filtered air is discharged into the vacuum cleaner body I+. However, during reverse operation, the rotational speed of the electric blower 36 is reduced by the deceleration resistor 43. The dust, especially the fine dust, in the dust collection bag 31 is more reliably prevented from leaking out of the cleaner body 11 through the gap or the like.

Furthermore, since the rotational speed of the electric blower 3G is similarly reduced by the deceleration resistor 43, the operating noise is lower than during normal cleaning, and the noise is lower when killing mites and the like.

Furthermore, the resistor 43, which is a current limiting element, generates heat due to aTi, but since this resistor 43 is located in the electric blower chamber 16, which is upstream of the dust collection chamber 15 during reverse operation, the deceleration resistor 43 The generated heat is also transferred to the dust collection chamber 15 along with the airflow.
sent inside. In this way, since the heat generated by the deceleration resistor 43 is also used to raise the temperature of the air, the temperature inside the dust collection chamber 15 further increases, and the mites and the like inside the dust collection bag 31 are reliably killed.

Further, during reverse operation, if a part of the exhaust port 17 is airtightly closed by the exhaust port cover 46 as described above, the amount of air sucked from the exhaust port 17 is reduced, and the load on the electric blower 36 is reduced. As a result, a large current flows through the electric motor 37 and the deceleration resistor 43, and the amount of heat generated therefrom increases, so that the dust collection chamber 15 is heated even more effectively. Therefore, the temperature rise becomes higher and insects can be killed even more effectively.

Then, even if the operation switch 41 is not operated, the timer switch 63 is turned off and the electric blower 36 is automatically stopped after a predetermined period of time has elapsed after the electric blower 36 started to operate in reverse. This prevents overheating.

Note that it is usually effective to kill insects by the above-mentioned reverse operation when the electric blower 36 is already hot immediately after cleaning.

By the way, when the suction port 25 is not closed by the suction port cover 26, the electric blower 36 cannot be operated in reverse because the limit switch 29 is off as described above. Therefore, dust in the dust collection chamber 15 will not be blown out to the outside by accidentally operating the electric blower 3Il in reverse with the suction port 25 open.

Further, according to the above configuration, by switching the wiring connection of the electric motor 37 and reversing the electric motor 37, the electric blower 3
Since the exhaust air from the electric blower 31 is sent into the dust collection chamber 15, there is no need to provide a dedicated recirculation air path in the vacuum cleaner body 11 for recirculating the exhaust air from the electric blower 31 into the dust collection chamber 15. This vacuum cleaner main body 11 can be made compact. Of course, the hose 51, which is not heat resistant, will not deteriorate due to heat.
Highly reliable.

〔Effect of the invention〕

According to the present invention, the following effects can be obtained.

In the vacuum cleaner according to claim 1, the suction port to the dust collection chamber of the vacuum cleaner body can be closed by a lid made of a filter material,
The electric blower inside the vacuum cleaner body can be rotated in forward and reverse directions, so by rotating the electric blower in reverse with the suction port closed by the lid, the air blower passes from the exhaust port of the vacuum cleaner body through the electric blower room and the dust collection chamber. By creating an airflow that is discharged from the suction port, the heat generated by the electric blower can be sent into the dust collection chamber, killing mites, etc. in the dust inside the dust collection chamber, making it hygienic. . Additionally, since there is no need for a dedicated return air path to return the exhaust air from the electric blower to the dust collection chamber, this hose will not deteriorate due to heat, unlike when the return air path is used as a hose. With,
Unlike the case where a return air passage is provided inside the vacuum cleaner body, the vacuum cleaner body does not become bulky, and reliability is improved and the vacuum cleaner body can be made smaller.

Furthermore, in the vacuum cleaner of claim 2, a current limiting element is added which is connected in series between the electric blower and the power supply when the electric blower is reversed, so that the rotation of the electric blower becomes lower when the electric blower is reversed. It is possible to more reliably prevent dust from leaking out of the vacuum cleaner body from the dust collection chamber through the suction port, and to install the current limiting element in the air path inside the vacuum cleaner body and away from the dust collection chamber during reverse rotation. Since it is disposed on the upstream side, the heat generated by the current limiting element is also used to heat the dust collection chamber, thereby making it possible to more effectively kill mites and the like in the dust collection chamber.

[Brief explanation of the drawing]

1 and 2 are sectional views showing one embodiment of the vacuum cleaner of the present invention, and FIGS. 3 to 5 are circuit diagrams of the same. 11. Vacuum cleaner body, 15. Dust collection chamber, 16. Electric blower chamber, 17. Exhaust port, 25. Suction port, 26. Lid body that blocks the suction port, 28. This lid body. filter material, 31...dust collection bag as a dust collection filter, 36...electric blower, 41...switch, 43...deceleration resistor as a current limiting element. 1989 ■ Date Inventor Masado Nakanishi Hiroshi Iwase

Claims (2)

[Claims] (1) A vacuum cleaner body having a dust collection chamber and an electric blower chamber therein, and a suction port that communicates the dust collection chamber with the outside, and an exhaust port that communicates the electric blower chamber with the outside; A built-in dust collection filter, an electric blower built in the electric blower chamber communicating with the dust collection chamber, and a switch for controlling the electric blower, and the suction port is made of air-permeable filter material. The electric blower can be closed and opened freely by a lid body, and the electric blower
The switch is capable of switching between a normal rotation state in which airflow is generated from the dust collection chamber side to the electric blower chamber side, and a reverse rotation state in which airflow is generated from the electric blower chamber side to the dust collection chamber side. A vacuum cleaner. (2) A current limiting element is provided which is electrically connected in series between the electric blower and its power source when the electric blower is reversed; 2. The vacuum cleaner according to claim 1, wherein the vacuum cleaner is disposed in an air path including a blower chamber and upstream of a dust collection chamber at the time of said reverse rotation.