JPH0646976A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide a cheap vacuum cleaner which can procure a high dust collecting efficiency with a simple constitution. CONSTITUTION:A dust collecting chamber 7 is provided in communication with a suction port 5 inside a body case 2 of a vacuum cleaner M1. An electromotive fan 8 for air suction is provided on the downstream of the dust collecting chamber 7. A pressure receiving chamber 9 is provided above the electromotive fan 8 and communicates with the suction side of the electromotive fan 8 through a tube 10 to receive air pressure on the suction side. A tact switch 17 to control the electromotive fan 8 is provided and faced to the pressure receiving chamber 9. When a vacuum degree on the suction side of the electromotive fan 8 rises up to a prescribed value, the tact switch 17 increases power supply to the electromotive fan 8, whereby the maximum suction workability of the vacuum cleaner M1 is raised up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly to a cleaner body case having an intake port to which a suction tool is connected, and a dust collection chamber communicating with the intake port in the main body case. And an electric suction blower provided in the main body case on the downstream side of the dust collection chamber.

[0002]

2. Description of the Related Art Conventionally, an electric vacuum cleaner of this type generally has a cleaner body case having an intake port to which a suction tool is connected,
The main body case includes a dust collection chamber that communicates with the intake port, and an electric suction blower provided in the main body case on the downstream side of the dust collection chamber.

In such an electric vacuum cleaner, a suction tool is connected to the suction port of the main body case through a bellows hose and an extension pipe, and an electric blower is driven to generate an air flow for suction. , Clean by sucking dust from the suction tool into the dust collection chamber.

[0004]

When cleaning is performed by such an electric vacuum cleaner, if the amount of dust in the dust collection chamber increases, the dust becomes an air resistance, and therefore, the suction tool, the extension pipe, and the bellows hose are used to intervene. The amount of air sucked into the dust collection chamber is reduced. Therefore, the dust collection efficiency is reduced and the pressure on the suction side of the electric blower is reduced, which may adversely affect the electric blower.

Therefore, the pressure on the suction side of the electric blower is detected by a pressure sensor, and based on the output of this pressure sensor, the input to the electric blower is increased to increase the suction force and improve the dust collection efficiency. An electric vacuum cleaner having the above structure was proposed.

However, in the vacuum cleaner having such a structure, an expensive pressure sensor is used, so that the cost becomes high, and the product price of the vacuum cleaner may be expensive.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an inexpensive electric vacuum cleaner which can secure a high dust collecting efficiency while having a simple structure. It is in.

[0008]

Means for Solving the Problem and Its Function The electric vacuum cleaner of the present invention has the following two forms. A first form thereof is a cleaner main body case having an intake port to which a suction tool is connected, a dust collection chamber communicating with the intake port in the main body case,
An electric blower for suction provided on the downstream side of the dust collection chamber in the main body case, and a pressure receiving chamber that is provided in communication with the suction side of the electric blower and receives air pressure on the suction side, and An electric vacuum cleaner comprising a control switch for controlling an electric blower, a diaphragm for closing an opening of a pressure receiving chamber, and a float for operating the control switch by displacement of the diaphragm.

The pressure receiving chamber receives the pressure of air on the suction side of the electric blower. The control switch controls the rotation speed and the like of the electric blower. The diaphragm is displaced when the pressure of the air in the pressure receiving chamber reaches a constant value, and can move the float. The movement of the float activates the control switch.

According to a second aspect of the present invention, a cleaner main body case having an intake port to which a suction tool is connected, a dust collection chamber communicating with the intake port in the main body case, and a dust collection chamber in the main body case. An electric blower for suction provided on the downstream side of the electric blower, and a pressure receiving chamber that is provided in communication with the suction side of the electric blower and receives the pressure of air on the suction side, and further supplies electric power to the electric blower. A first control switch for increasing the power, and a second control switch for decreasing the power supplied to the electric blower,
The vacuum cleaner is provided with a diaphragm that closes an opening of the pressure receiving chamber, and a first float and a second float that operate the first control switch and the second control switch, respectively, by the displacement of the diaphragm.

The pressure receiving chamber receives the pressure of air on the suction side of the electric blower. The first control switch increases the electric power supplied to the electric blower. The second control switch reduces the electric power supplied to the electric blower. The diaphragm is displaced when the pressure of the air in the pressure receiving chamber reaches a constant value, and can move the first float and the second float. The movement of these floats operates the first control switch and the second control switch.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to two embodiments shown in the drawings. The present invention is not limited to these.

Embodiment 1 In FIG. 1, M ₁ is a so-called canister type vacuum cleaner. The electric vacuum cleaner M ₁ includes a cleaner main body 1. The cleaner body 1 includes a cleaner body case 2 made of plastic, various components provided in the body case 2, and wheels 3 provided at a lower portion of the body case 2.
4 and.

An intake port 5 is provided in the front part of the main body case 2. A joint 6 forming a part of the bellows hose is detachably fitted into the intake port 5. And
The suction device is detachably connected via the bellows hose and the extension pipe.

Inside the main body case 2, a dust collection chamber 7 is provided so as to communicate with the intake port 5. In addition, a blower housing chamber 40 that houses the electric suction blower 8 is formed on the downstream side (rear side) of the dust collection chamber 7. 41 is a blower storage room 40
It is an electrical equipment storage chamber formed above. The electric component storage chamber 41 has a control unit 1 for controlling the drive of the electric blower 8.
1, a control circuit board, and the like are provided.

The control unit 11 has a structure as shown in FIG. That is, the control unit 11 controls the upper case 12,
A lower case 13, a diaphragm 15 sandwiched between the upper and lower cases 12 and 13, a float 14 attached to the diaphragm 15, and a substrate 16 airtightly attached to the upper case 12 via a packing 18 are provided.

Reference numeral 9 is a pressure receiving chamber surrounded by the upper case 12 and the diaphragm 15. This pressure-receiving chamber 9 is the upper case 1
The tube 10 connected to the connecting portion 12a formed on
Is connected to the intake side (suction side) of the electric blower 8. Then, when the pressure on the intake side of the electric blower 8 is reduced, that is, when the dust collection chamber 7 is filled with dust, the pressure in the pressure receiving chamber 9 is a certain value less than the pressure in the electrical component storage chamber 41 communicating with the atmosphere. Get lower. Then, the diaphragm 15 is displaced by a certain amount toward the pressure receiving chamber 9 side.

Reference numeral 17 denotes a tact switch as a control switch formed on the substrate 16 and arranged so as to face the pressure receiving chamber 9. The tact switch 17 controls the output of the electric blower 8. That is, when the tact switch 17 operates, the power supplied to the electric blower 8 increases.

The upper case 12 and the lower case 13 have a circular cylindrical structure as shown in FIGS. 3 and 4, respectively. The upper case 12 is fitted in the upper part of the lower case 13. A circular diaphragm 15 as shown in FIG. 7 is arranged at the joint between the upper case 12 and the lower case 13. The float 14 has a structure as shown in FIG. 5, and the upper half part is inside the upper case 12 and the lower half part is inside the lower case 13 in a state where the float 14 is tightly fitted in the circular opening of the diaphragm 15. positioned.

As shown in FIG. 8, the substrate 16 is a substantially rectangular plate. Then, the packing 18 shown in FIG.
Is attached to the upper surface of the upper case 12 via
The upper case 12 is completely sealed. A tact switch 17 is attached to the lower surface of the board 16. The tact switch 17 projects downward from the opening of the upper case 12, and the operating portion 17a thereof has a float 1 position.
4 is opposed to the upper surface of the central protrusion 14a.

In the electric vacuum cleaner M ₁ constructed as described above, the electric blower 8 operates and the air pressure (vacuum degree) on the suction side of the electric blower 8 changes. And
When the vacuum level rises to a constant value, the diaphragm 15
Is displaced upward by a certain amount, and the float 14 can be moved upward. The movement of the float 14 pushes up the actuating portion 17a of the tact switch 17 to activate the tact switch 17. When the tact switch 17 operates, the electric power supplied to the electric blower 8 increases. Then, the maximum suction power of the electric vacuum cleaner M ₁ increases.

The electric vacuum cleaner M ₁ has a control unit 11
A board 16 with a tact switch 17 is attached to the upper case 12 via a packing 18. Therefore, air leakage is eliminated, and the change in the degree of vacuum on the suction side of the electric blower 8 can be accurately transmitted to the tact switch 17.

Thus, in this electric vacuum cleaner M ₁ , the air pressure on the suction side of the electric blower 8 can be detected and the electric blower 8 can be controlled according to the pressure with a simple and inexpensive structure. Therefore, the dust collection efficiency can be improved.

Embodiment 2 Referring to FIG. 9, a cleaner body 20 of an electric vacuum cleaner M _{2 comprises} a cleaner body case 2 made of plastic, various components provided in the body case 2, and a body case 2 And wheels 3 and 4 provided on the lower part of.

Inside the main body case 2, a dust collection chamber 7 is provided in communication with the intake port 5. In addition, a blower housing chamber 40 that houses the electric suction blower 8 is formed on the downstream side (rear side) of the dust collection chamber 7. 41 is a blower storage room 40
It is an electrical equipment storage chamber formed above. The electric component storage chamber 41 has a control unit 2 for controlling the drive of the electric blower 8.
1, a control circuit board, and the like are provided.

The control unit 21 has a structure as shown in FIG. That is, the control unit 21 controls the upper case 2
2, the lower case 23, the diaphragm 25 sandwiched between the upper and lower cases 22 and 23, the second float 34 attached to the diaphragm 25, the first float 24 attached to the second float 34, and the packing 28 on the upper case 22.
And a substrate 26 airtightly attached via.

Reference numeral 19 denotes an upper case 22 and a diaphragm 25.
It is a pressure receiving room surrounded by and. The pressure receiving chamber 19 communicates with the intake side (suction side) of the electric blower 8 by the tube 10 connected to the connection portion 22a formed in the upper case 22. When the pressure on the intake side of the electric blower 8 drops, that is, when the dust collection chamber 7 is filled with dust, the pressure receiving chamber 19
The internal pressure becomes lower than the internal pressure of the electrical component storage chamber 41 communicating with the atmosphere by a constant value. Then, the diaphragm 25 is displaced toward the pressure receiving chamber 19 side by a certain amount.

The pressure receiving chamber 19 is formed on the substrate 26.
It is a first tact switch as a first control switch arranged in a state of facing the above. Reference numeral 37 denotes a second tact switch as a second control switch which is formed on the substrate 26 and is arranged so as to face the pressure receiving chamber 19. These two tact switches 27 and 37 control the output of the electric blower 8. That is, the first tact switch 27 increases the electric power supplied to the electric blower 8. Second
The tact switch 37 reduces the electric power supplied to the electric blower 8.

The second float 34 is located in the upper case 22 in the upper half and in the lower case 23 in the lower half with the second float 34 closely fitted in the circular opening of the diaphragm 25.
The first float 24 is biased upward by a coil spring 29 arranged between the first float 24 and the diaphragm 25. The projecting portion 24a projects upward from an opening provided in the upper portion of the second float 34.

That is, the first tact switch 27 projects downward from the first opening of the upper case 22, and the operating portion 27a thereof faces the upper surface of the protrusion 24a of the first float 24. The second tact switch 37 has a shorter length than the first tact switch 27 and projects downward from the second opening of the upper case 22, and its operating portion 37a faces the upper surface of the protruding portion 34a of the second float 34. is doing.

In the electric vacuum cleaner M ₂ configured as described above, the electric blower 8 operates and the air pressure (vacuum degree) on the suction side of the electric blower 8 changes. And
When the degree of vacuum rises to a constant value, the diaphragm 25
Is displaced upwards by a certain amount as shown in FIG.
The float 24 and the second float 34 can be moved upward.

Then, the protrusion 24a of the first float 24
Since the upper surface of the push-up pushes up the operating portion 27a of the first tact switch 27, the first tact switch 27 operates. First
When the tact switch 27 operates, the electric power supplied to the electric blower 8 increases. Then, the maximum suction power of the electric vacuum cleaner M ₂ increases.

When the degree of vacuum further rises to a predetermined value, the diaphragm 25 is displaced upward by a predetermined amount as shown in FIG. 12, and the second float 34 can be moved upward.

Then, the protrusion 34a of the second float 34
The upper surface of the upper part pushes up the actuating portion 37a of the second tact switch 37, so that the second tact switch 37 operates. Second
When the tact switch 37 operates, the electric power supplied to the electric blower 8 decreases. Then, the maximum suction power of the electric vacuum cleaner M ₂ decreases.

Thus, in this electric vacuum cleaner M ₂ , the air pressure on the suction side of the electric blower 8 can be detected with a simple and inexpensive structure, and the electric blower 8 can be controlled according to the pressure. Therefore, the dust collection efficiency can be improved. Furthermore, this electric vacuum cleaner M ₂ is provided with a dust collecting chamber 7
In the event of an abnormal situation in which the dust inside has become full and the pressure on the suction side of the electric blower 8 has dropped abnormally,
The tact switch 37 operates. And electric blower 8
Input to the electric blower 8 to protect the electric blower 8 and prevent the cleaner body 20 from being deformed due to pressure drop.

The electric vacuum cleaner M ₂ has a control unit 21.
A board 26 with a first tact switch 27 and a second tact switch 37 is attached to the upper case 22 via a packing 28. Therefore, air leakage is eliminated, and changes in the degree of vacuum on the suction side of the electric blower 8 can be accurately transmitted to the first tact switch 27 and the second tact switch 37.

[0037]

According to the electric vacuum cleaner of the first aspect of the present invention, the pressure of air on the suction side of the electric blower is detected with a simple and inexpensive structure, and the electric blower is controlled according to the pressure. It is possible to improve the dust collection efficiency. According to the electric vacuum cleaner of claim 2 of the present invention, it is possible to detect the pressure of air on the suction side of the electric blower and control the electric blower according to the pressure with a simple and inexpensive structure. It becomes possible to improve the dust collection efficiency.

Further, according to the electric vacuum cleaner of the second aspect, when an abnormal situation occurs such that the pressure on the suction side of the electric blower is abnormally lowered, the second tact switch is actuated to drive the electric vacuum cleaner. It is possible to protect the blower and prevent the cleaner body from being deformed due to pressure drop.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view of an electric vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is a structural explanatory view of a control unit in the electric vacuum cleaner.

FIG. 3 is a structural explanatory view of an upper case that constitutes the control unit.
(A) is a top view, (b) is a side view, (c) is a bottom view, and (d) is a cross section.

FIG. 4 is a structural explanatory view of a lower case which constitutes the control unit.
(A) is a top view, (b) is a side view, (c) is a bottom view, and (d) is a cross section.

FIG. 5 is an explanatory diagram of a configuration of a float that constitutes the control unit.
(A) is a top view, (b) is a side view, and (c) is a cross section.

FIG. 6 is a structural explanatory view of a packing that constitutes the control unit.

FIG. 7 is a structural explanatory view of a diaphragm which constitutes the control unit.

FIG. 8 is a structural explanatory view of a substrate that constitutes the control unit.
(A) is a side view, (b) is a top view.

FIG. 9 is a structural explanatory view of the electric vacuum cleaner according to the second embodiment of the present invention.

FIG. 10 is an explanatory diagram of a configuration of a control unit in the electric vacuum cleaner.

FIG. 11 is a structural explanatory view showing a state in which the control unit is operating.

FIG. 12 is a structural explanatory view showing a state during operation of the control unit.

[Explanation of symbols]

 1 Vacuum Cleaner Main Body 2 Main Body Case 5 Intake Port 7 Dust Collection Chamber 8 Electric Blower 9 Pressure Chamber 10 Tube 11 Control Part 12 Upper Case 13 Lower Case 14 Float 15 Diaphragm 16 Board 17 Tact Switch (Control Switch) 18 Packing 20 Vacuum Cleaner Main Body 21 Control Part 22 Upper Case 23 Lower Case 24 First Float 25 Diaphragm 26 Substrate 27 First Tact Switch (First Control Switch) 28 Packing 34 Second Float 37 Second Tact Switch (Second Control Switch)

Claims (2)

[Claims] 1. A cleaner main body case having an intake port to which a suction tool is connected, a dust collection chamber communicating with the intake port in the main body case, and provided in the main body case downstream of the dust collection chamber. An electric blower for suction, and a pressure receiving chamber that is provided in communication with the suction side of the electric blower and receives the pressure of air on the suction side, and further includes a control switch for controlling the electric blower and an opening of the pressure receiving chamber. An electric vacuum cleaner comprising a diaphragm that is closed and a float that operates a control switch by the displacement of the diaphragm. 2. A cleaner main body case having an intake port to which a suction tool is connected, a dust collection chamber communicating with the intake port in the main body case, and provided in the main body case on the downstream side of the dust collection chamber. An electric blower for suction, and a pressure receiving chamber that communicates with the suction side of the electric blower and receives the pressure of air on the suction side, and further includes a first control switch that increases the power supplied to the electric blower. Second, to reduce the power supply to the electric blower
An electric vacuum cleaner comprising: a control switch; a diaphragm that closes an opening of a pressure receiving chamber; and a first float and a second float that operate a first control switch and a second control switch by displacement of the diaphragm, respectively.