JPH04329916A - Electric vacuum cleaner - Google Patents

Abstract

PURPOSE:To supply an electric vacuum cleaner which can exterminate sufficiently harmful insects like ticks even if dust in the room increases. CONSTITUTION:The shutter 51 is slid backward, the detection switch 53 of the open or closed shutter is closed, and further, the motor-driven fan 21 is turned on when exterminating harmful insects like ticks in the dust collected in the collection chamber 13. The exhausted air heated from the electric fan 21 is recycled to the dust collection chamber 13 through the recycling air way 28 at the body side and the recycling air way 58 at the cover side. The negative pressure of the recycling air way 58 is detected by a negative pressure detector 65 and the output of the motor-driven fan 21 is decreased because of the lower negative pressure when the dust in the dust collection chamber 13 is little. The output is increased because of the higher negative pressure when the dust in the dust collection chamber 13 to securely exterminate harmful insects like ticks in the dust chamber 13. When the temperature of exhaust air gets to about 50 deg.C, the output of phase controller 74 is halted by a thermo-sensor 64 to stop the motor-driven fan 21.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner that uses the heat of exhaust air from an electric blower to kill pests such as mites sucked into a dust collection chamber.

0003

[Prior Art] Conventionally, exhaust air from an electric blower is circulated through a recirculation air path into a dust collection chamber, and the heat of the exhaust air is used to remove pests such as mites that are sucked into the dust collection chamber along with dust. Vacuum cleaners configured to kill off are known.

0004

[Problems to be Solved by the Invention] However, in the case of conventional vacuum cleaners that circulate exhaust air, the electric blower is driven with a constant output regardless of the amount of dust collected in the dust collection chamber. When the amount of dust in the dust collection chamber increases, the air volume decreases, and the amount of heat that is circulated also decreases, causing the problem that sufficient effects cannot be obtained when there are many pests such as mites to be killed.

The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide a vacuum cleaner that can sufficiently kill pests such as mites even if the amount of dust in the dust collection chamber increases. .

[Configuration of the invention]

[0007]

[Means for Solving the Problems] The vacuum cleaner of the present invention includes:
a dust collection chamber, an electric blower storage chamber that communicates with the dust collection chamber and stores an electric blower, and a circulation air path that includes a return air path that recirculates exhaust air from the electric blower storage chamber to the dust collection chamber; The apparatus includes negative pressure detection means for detecting negative pressure in the air passage, and control means for controlling the output of the electric blower in proportion to the negative pressure detected by the negative pressure detection means.

[0008]

[Operation] The present invention detects the negative pressure in a circulation air passage including a dust collection chamber, an electric blower storage room, and a recirculation air passage with a negative pressure detection means, and is proportional to the negative pressure detected by this negative pressure detection means. By controlling the output of the electric blower with the control means, when the amount of dust in the dust collection chamber is small, the output of the electric blower is lowered to suppress unnecessary power consumption and reduce the amount of dust in the dust collection chamber. When the amount is large, increase the output of the electric blower to ensure the destruction of dust mites and other pests in the dust collection chamber.

[0009]

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

In FIG. 1, 1 is a vacuum cleaner body, and this vacuum cleaner body 1 includes a main body case 3 having an opening 2 at the upper front side, and a lid that covers the opening 2 of the main body case 3 so as to be openable and closable from above. It consists of 4 bodies. The main body case 3 also includes a lower main case member 5 and a lower main case member 5.
It consists of an upper body case member 6 fixed to the rear upper side of the body. A steering wheel 8 is located in front of the lower part of the main body case 3.
is rotatably attached to change direction, and a driven wheel 9 is rotatably attached to the rear.

Inside the main body case 3, a dust collection chamber 13 facing the opening 2 is defined at the front by a partition wall 12 having lattice holes 11, and an electric blower chamber 14 is defined at the rear. ing. In the dust collection chamber 13, a dust collection bag holder 15 is pivotally attached to the upper part, and a dust collection bag 16 having a function as a main dust collection filter is detachably attached to the dust collection bag holder 15. Retained. This dust collection bag 16 is replaced as needed through the opening 2. Furthermore, an auxiliary filter 17 is attached to the front side of the partition wall 12 to cover the lattice holes 11.

On the other hand, inside the electric blower chamber 14, an electric blower 21 is installed between the upper body case member 6 and the lower body case member 5.
It is supported by support walls 22, 23, 24 formed in the same direction via rubber holding members 25, 26. The electric blower 21 has an intake side and an exhaust side that are airtightly partitioned by an annular holding member 25 on the front side, but the intake side of the electric blower chamber 14 communicates with the dust collection chamber 13 through the grid hole 11. ing. On the other hand, the exhaust side of the electric blower 21 is communicated with the outside via an exhaust filter and an exhaust port 27 to an exhaust port (not shown) formed on the rear surface of the main body case 3 or the like.

[0013] Furthermore, in the rear upper part of the main body case 3, a main body side recirculation air passage 28 communicating with the exhaust side of the electric blower 21 is formed at the joint of the upper main body case member 6 and the lower main body case member 5. One downstream end of this body-side recirculation air passage 28 opens at the upper part of the front support wall 22.

The lid body 4 includes a lid cover 31 and this lid cover 3.
a back plate 32 fixedly attached to the lower side or back side of 1;
The outer shell is made up of these. For example, a rear end portion of the lid cover 31 is supported by the main body case 3 via a fulcrum portion 33 so as to be vertically movable. Further, in order to hold the lid body 4 in a closed state, a locking claw portion 34 is formed at the front end of the back plate 32, and this locking claw portion 34 is removably engaged. A lock receiving portion 35 is formed at the front end of the main body case 3. Note that a back plate 32 of the opening 2 of the main body case 3 is provided when the lid 4 is closed.
A seal packing 36 is attached which is pressed into contact with.

Further, the lid cover 31 and the back plate 32 are formed with an outer opening 41 and an inner opening 42, respectively, which face each other. A box-shaped rotating body cover 43 with an open bottom is disposed within the lid 4 between the outer opening 41 and the inner opening 42 . The rotating body cover 43 is sandwiched and fixed between the lid cover 31 and the back plate 32, and has an intermediate opening 44 on its upper surface that faces the outer opening 41 with a slight distance therebetween. A rotating body 45, which serves as an insertion port, is rotatably held between the rotating body cover 43 and the back plate 32. This rotating body 45 consists of an upper moving body member 47 and a lower moving body member 48 that are connected to each other via a rotating body packing 46.
It has a substantially cylindrical insertion port 49 that is coaxial with the rotation axis. This insertion port 49 faces the intermediate opening 44 of the rotating body cover 43 and is connected to the back plate 32 of the dust collection chamber 13.
The two are in communication via the inner opening 42 of the two. Note that a socket packing 50 is attached to the peripheral edge of the inner opening 42, and the lower end peripheral part of the socket 49 is in slidable contact with the socket packing 50.

[0016] A hose insertion tube (not shown) is removably fitted into the insertion port 49.

Further, a plate-shaped shutter 51 is supported between the back surface of the lid cover 31 and the top surface of the rotating body cover 43 so as to be slidable in the front and rear directions. The shutter 51 opens and closes the outer opening 41 of the lid cover 31 and covers the insertion opening 49 of the rotating body 45 from above. A knob 52 is formed at the rear end of the shutter 51 and projects upwardly and outwardly from the outer opening 41. Further, a shutter opening/closing detection switch 53 is attached to the front end of the shutter 51 to detect opening/closing of the shutter 53.

Further, in the rear part of the lid body 4, there is a lower duct member 56 integrally formed extending rearward from the lower part of the rotating body cover 43, and an upper duct member 57 fixed on the lower duct member 56. A lid side return air passage 58 is formed by this. This lid body side return air passage 58 has a front end opening between the outer opening 41 of the lid cover 31 and the upper surface of the rotating body 45 and a downstream opening 59 communicating with the insertion port 49, and a rear end. is an upstream opening 60 opened at the rear surface of the lid body 4 facing the main body case 3. Note that an air passage packing 61 is attached to this upstream opening 60 and is pressed against the peripheral edge of the main body side return air passage 28 when the lid body 4 is closed. In this way, a circulating air passage 62 is formed by the body side return air passage 27, the lid body side return air passage 58, the dust collection chamber 13, the electric blower chamber 14, and the like.

Furthermore, the cover side recirculation air passage 5 of the circulation air passage 62
8 is attached with a pressure sensor 63 and a temperature sensor 64 for detecting wind pressure. Further, the circulation air passage 62 is provided with a pressure sensor 65 as a negative pressure detection means for detecting the negative pressure within the circulation air passage 62.

A flap 66 for opening and closing the lid-side return air passage 58 is provided at the front of the lid-side return air passage 58. The flap 66 is supported by the upper duct member 56 and the lower duct member 57 at fulcrum portions 67 protruding from both left and right sides of the upper portion thereof, so as to be rotatable back and forth within an acute angle range.

[0021] Also, on the inner peripheral surface of the lid side return air passage 58,
A flange-shaped receiving portion 68 is formed protrudingly located in front of the flap 66, that is, on the side of the downstream opening 59, and with which the outer peripheral portion of the flap 66 abuts from the rear when the flap 66 closes the lid-side return air passage 58. There is.

Further, on the upper surface of the lid-side recirculation air passage 58, adjacent to the rear of the fulcrum portion 67, when the flap 66 falls backward, that is, toward the upstream opening 60 and opens, this flap 66 is placed. Concave flap storage section 69 to be stored
is formed. When the flap 66 is stored in the flap storage portion 69, one surface of the flap 66 protrudes into the lid-side return air passage 58 and forms a part of the return air passage 58. ing.

Further, the shutter 51 and the flap 66 are interlocked. That is, when the shutter 51 closes, the flap 66 rotates rearward and upward to open, and when the shutter 51 opens, the flap 66 rotates forward and downward to close.

The circuit configuration of this vacuum cleaner is shown in FIG. That is, the commercial AC power supply 7
1, an electric blower 21 having a control means 72 is connected in series through a plug and an outlet (not shown). The control means 72 includes a triac 73 connected in series to the electric blower 21 and a phase control section 74 that controls the phase of the triac 73. The phase control section 74 also includes a negative pressure detection means 65 and a temperature sensor 6.
4 and a series circuit of a shutter open/close detection switch 53 are connected.

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

During normal cleaning, the shutter 51 is slid forward and opened, and the insertion port of the rotating body 45 inside the lid body 4 is opened through the open outer opening 41 of the lid cover 31 of the lid body 4. Connect by inserting the hose insertion tube connected to the suction port into 49. At this time, as the shutter 51 opens, the shutter 51 separates from the flap 66, so the flap 66 rotates forward and downward and closes. In this state, the outer peripheral portion of the flap 66 abuts the flange-shaped receiving portion 68 in the lid return air passage 58 from the rear. Note that the tip of the hose insertion tube passes through the inner opening 42 of the back plate 32 and is inserted into the dust collection bag 16. Further, by sliding the shutter 51 forward and opening it, the shutter opening/closing detection switch 53 is opened and the temperature sensor 64 is turned off.

[0027] After that, when an operation switch provided on the grip tube of the hose is turned on, the triac 73 is controlled at a predetermined phase angle and the electric blower 21 is driven with a predetermined output, thereby blowing the dust out of the air. At the same time, it is sucked into the suction port body from the outside and passed through the extension pipe and hose.
The dust is guided into the dust collection chamber 13 of the cleaner body 1 and captured in the dust collection bag 16. On the other hand, the air filtered by the dust collection bag 16 passes through the auxiliary filter 17, the grid holes 11 and the electric blower 21, and then passes through the exhaust filter to the exhaust port 2.
7 to the outside of the vacuum cleaner body 1.

Furthermore, when killing pests such as mites in the dust trapped in the dust collection chamber 13, the hose insertion tube is removed from the insertion port 49, and the shutter 51 is slid backward. The lid cover 51 is closed to close the outer opening 41 of the lid cover 51. When the shutter 51 is closed in this manner, first, the shutter 51 pushes the flap 66 rearward, causing the flap 66 to rotate rearward and upward and open.
It enters the flap storage section 69. By sliding the shutter 51 forward and opening it, the shutter opening/closing detection switch 53 is closed and the electric blower 21 is turned on.

By driving this electric blower 21, air is sucked into the electric blower 21 from inside the dust collection chamber 13, and
The exhaust air from this electric blower 21 is transferred to the main body side recirculation air passage 2
8 and is introduced into the lid-side reflux air passage 58, and is further refluxed from the lid-side reflux air passage 58 into the dust collection chamber 13. When air passes through the electric blower 21, this electric blower 2
1 is heated by removing the heat generated by the dust collecting chamber 13, but as the circulating air circulates between the electric blower 21 and the dust collecting chamber 13 as described above, the temperature inside the dust collecting chamber 13 rises. Dust mites and the like in the dust collection chamber 13 are killed by the heat.

Furthermore, in the pressure sensor 65, the circulation air path 58
The phase control unit 74 controls the phase of the triac 73 in proportion to the negative pressure detected by the pressure sensor 65, thereby controlling the output of the electric blower 21. That is, when the amount of dust in the dust collection chamber 13 is small, the output of the electric blower 21 is lowered because the negative pressure is small, thereby suppressing power consumption more than necessary, and when the amount of dust in the dust collection chamber 13 is large. At this time, since the negative pressure is large, the output of the electric blower 21 is increased to ensure that pests such as mites in the dust collection chamber 13 are exterminated.

For example, when the temperature of the exhaust air reaches about 50° C., the phase control section 74 is activated by the temperature sensor 64.
The output of the electric blower 21 is stopped, and the electric blower 21 is automatically stopped.

[0032]

[Effect of the invention] According to the vacuum cleaner of the present invention, the dust collection chamber,
Negative pressure in the electric blower storage chamber and the circulation air passage including the return air passage is detected by a negative pressure detection means, and the output of the electric blower is controlled by the control means in proportion to the negative pressure detected by the negative pressure detection means. By doing this, when the amount of dust in the dust collection chamber is small,
Since the negative pressure is small, the output of the electric blower is reduced, thereby reducing unnecessary power consumption, and when the amount of dust in the dust collection chamber is large, the output of the electric blower is increased due to the large negative pressure. To reliably kill pests such as mites in the dust collection room.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a vacuum cleaner of the present invention.

FIG. 2 is a block diagram of the same as above.

[Explanation of symbols]

13 Dust collection chamber 14 Electric blower room 21 Electric blower 28 Main body side return air passage 58 Lid side return air passage 62 Circulation air passage 65 Sensor 72 as load detection means
control means

Claims (1)

[Claims] 1. A circulating air system comprising a dust collection chamber, an electric blower storage chamber that communicates with the dust collection chamber and stores an electric blower, and a return air passage that circulates exhaust air from the electric blower storage chamber to the dust collection chamber. a negative pressure detection means for detecting the negative pressure of the circulation air passage; and a control means for controlling the output of the electric blower in proportion to the negative pressure detected by the negative pressure detection means. A vacuum cleaner with special features.