JPH0810192A - Electric vacuum cleaner - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object to provide an electric vacuum cleaner capable of efficiently cooling an electric blower. A cooling fan motor 40 driven by a voltage of a field coil of an electric blower 23 is installed in an electric blower chamber 23a.
And an outer wall 30a, and is an electric vacuum cleaner that constantly cools the electric blower 23 with a cooling pipe 41.

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 used in homes and the like.

[0002]

2. Description of the Related Art A conventional vacuum cleaner has a structure as shown in FIG. Reference numeral 23 is an electric blower configured as shown in FIG. In the electric vacuum cleaner 30, when the volume of the collected dust increases, the amount of air sucked by the electric blower 30 decreases, and the cooling air that cools the electric blower 23 decreases accordingly. For this reason, the temperature of the armature coil 21, the field coil 22, and the like that form the electric blower 23 may rise abnormally.

In order to prevent such an abnormal temperature rise of the electric blower 23, an air protector for detecting the time when the amount of air blown by the electric blower 23 falls below a certain value and forcibly taking in the amount of cooling air. 31 (not shown),
An overheat prevention device such as a thermo protector 32 for detecting that the temperature of the electric blower has reached a certain value or more and forcibly cutting off the power supply to the electric blower 23 is built in.

The air protector 31 is an electric blower 2
When the amount of intake air by 3 decreases, the valve opens to guide the outside air to the intake port of the electric blower 23. The thermo protector 32 is fixed to the side wall 35 of the cord reel 34 around which the power cord 33 is wound with a screw or the like (not shown), and the electric blower 2
It operates so as to stop the power supply to 3.

The electric blower 23 is constructed as shown in FIG. That is, 1 is an armature having a commutator 2, and bearings 4 are press-fitted at both ends of a shaft 3, and the bearings 4 are supported by a load side bracket 5 and an anti-load side bracket 6 made of a resin material. 7 is a carbon brush 8
Is a brush holder having a built-in, and is held by the anti-load side bracket 6. 9 is a field core. 10 is
It is an air guide made of a resin material formed between the load side bracket 5 and the impeller 11 which is a load. Impeller 1
A casing 12 having an intake port 12a corresponding to the intake port 11a of the impeller 11 covers the upper part of 1.
The impeller 11 includes a spacer 13, a washer 14, and a nut 1.
It is fixed to the shaft 3 by 5. Further, the air guide 10 is fixed to the load side bracket 5 using a screw or the like not shown. The load-side bracket 5 and the anti-load-side bracket 6 are similarly fixed using screws or the like (not shown). 16 is the intake port 1 of the casing 12
The intake lid is made of a resin material or the like for forming 2a and is fixed to the casing 12 by welding or the like.

The impeller 11 has a structure in which a plurality of blades 17 are arranged between an umbrella-shaped front shroud 18 having a suction port 11a in the center and a flat plate-shaped rear shroud 19.

Reference numerals 21 and 22 are an armature coil and a field coil respectively wound around the armature 1 and the field core 9.

[0008]

Recently, the electric vacuum cleaner 30 has been used.
The suction performance of the electric fan has been dramatically improved, and the input to the electric blower 23 has also been increased. Also, with the spread of fuzzy control and the like, the suction force is being controlled over a wide range from strong to weak. In the case of the electric vacuum cleaner 30 which requires such a wide range of control, in order to prevent the temperature of the electric blower 23 from rising excessively, the range from “strong” to “medium” is covered by the air protector 31, The range from "medium" to "weak" is covered by the thermo protector 32.

However, the conventional vacuum cleaner has the following problems. That is, even if the temperature of the electric blower 23 is prevented from rising excessively in the range of medium to low suction force by the thermo protector 32, the cord reel 34 to which the thermo protector 32 is attached is prevented.
The temperature gradient is very large in the vicinity. That is, when the thermo protector 32 detects a predetermined temperature, the electric blower 23 may have risen in temperature above the upper limit temperature.

On the contrary, if the operation set temperature of the thermo protector 32 is lowered, the thermo protector 32 operates before the temperature of the electric blower 23 rises, and the electric blower 2
The situation occurs in which item 3 stops and cannot be used.

SUMMARY OF THE INVENTION The present invention is intended to solve the problems of the conventional structure as described above, and a first object of the present invention is to provide an electric vacuum cleaner capable of preventing an excessive temperature rise of an electric blower. I am trying. The second to seventh objects are to provide second to seventh means for achieving the first object.

[0012]

The first means for achieving the first object of the present invention is to provide an electric blower provided in an electric blower chamber for sucking dust, and a field coil voltage of the electric blower. The electric vacuum cleaner includes a cooling fan motor provided between an operating electric blower chamber and an outer wall, and a cooling pipe for cooling the electric blower connected to the cooling fan motor.

The second means of the present invention for achieving the second object is, in particular, an electric vacuum cleaner in which a cooling fan motor is arranged between a power cord chamber for accommodating a power cord of the electric vacuum cleaner and an outer wall. It is what

A third means of the present invention for achieving the third object is, in particular, an electric vacuum cleaner in which a cooling fan motor is provided in the vicinity of a phase control circuit board on which a circuit for controlling an electric blower is mounted. It is what

A fourth means of the present invention for achieving the fourth object is, in particular, an electric vacuum cleaner in which a cooling fan motor is driven by a control circuit controlled by suction pressure of an electric blower.

Further, a fifth means of the present invention for achieving the fifth object is, in particular, an electric vacuum cleaner in which a cooling fan motor is driven by a control circuit which is controlled by the air volume of an electric blower.

A sixth means of the present invention for achieving the sixth object is, in particular, an electric vacuum cleaner in which a cooling fan motor is driven by a control circuit which is controlled by the temperature rise of an electric blower.

Further, the seventh means of the present invention for achieving the seventh object is, in particular, that a substantially disk-shaped cooling plate concentric with the shaft of the electric blower is provided on the commutator element of the electric blower. The vacuum cleaner is brought into contact with the vacuum cleaner.

[0019]

According to the first means of the present invention, the cooling air from the cooling fan motor provided between the electric blower chamber and the outer wall of the main body is sent to the electric blower by the cooling pipe to cool each part of the electric blower. It is a thing.

The second means of the present invention is that the cooling fan motor provided between the power cord chamber and the outer wall functions to cool the power cord and prevent an abnormal temperature rise of the power cord. .

A third means of the present invention is that the cooling fan motor acts to cool the substrate for the phase control circuit having a triac or the like, so that an abnormal temperature rise of elements such as the triac can be prevented.

According to the fourth means of the present invention, the cooling fan motor is driven by the control circuit for detecting and controlling the suction pressure of the electric blower, and particularly when it is driven when the suction pressure is low and the cooling capacity is low, it is efficient. It functions so as to cool each part of the electric blower.

In the fifth means of the present invention, the cooling fan motor is driven by a control circuit for detecting and controlling the air volume of the electric blower. Especially, when the cooling fan motor is driven when the air volume is small and the cooling capacity is low, the cooling efficiency of the electric blower is improved. It acts so as to cool each part.

In the sixth means of the present invention, the cooling fan motor is driven by a control circuit which directly detects and controls the temperature rise of the coils of the electric blower, and acts so as to exert the cooling effect with extremely high accuracy. To do.

The seventh means of the present invention is that a substantially disk-shaped cooling plate provided concentrically with the shaft of the electric blower acts to radiatively cool the heat generated by the commutator / carbon brush.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. The same parts as those of the conventional vacuum cleaner are designated by the same reference numerals and the description thereof will be omitted.

An electric blower chamber 23a in the main body 30 is provided with an electric blower 23 for sucking dust. Further, a cooling fan motor 40 that operates by the field coil voltage of the electric blower is provided between the electric blower chamber 23a and the outer wall 30a of the main body 30. The cooling air blown by the cooling fan motor 40 flows through the cooling pipe 41 connected to the cooling fan motor 40. The cooling pipe 41 is
The electric blower 23 is connected to the electric blower room 23a.
Commutator, carbon brush, shaft, bearing, armature coil,
The field coil and the like are cooled.

Although not shown, as in the conventional case, an air protector forcibly taking in cooling air when the amount of air blown by the electric blower 23 decreases below a predetermined value, and the temperature of the electric blower 23 rises above a certain value. Electric blower 2 when rising
It is equipped with a thermo protector that shuts off the power supply to 3.

FIG. 2 is a circuit diagram showing the electrical connection of this embodiment. The cooling fan motor 40 is connected between arbitrary terminals 22a and 22b of the field coil 22 of the electric blower 23, and is driven by this voltage.

The operation of this embodiment will be described below. The voltage of the field coil 22 is applied to the cooling fan motor 40 while the user is operating the electric blower 23 using the electric vacuum cleaner. That is, the cooling fan motor 40 constantly blows cooling air while the user is using the electric vacuum cleaner. This cooling air flows through the cooling pipe 41.
Is guided to the electric blower chamber 23a by means of which the commutator, carbon brush, shaft, bearing, armature coil, field coil, etc. of the electric blower 23 are cooled.

Therefore, according to this embodiment, the electric blower 23
It is possible to prevent an abnormal temperature rise in each part.

Next, the second embodiment of the present invention will be described with reference to FIG.
Will be explained. In this embodiment, the cooling fan motor 40
Is provided between the power cord chamber 33a of the main body 30 and the outer wall 30a.

Therefore, the cooling air blown by the cooling fan motor 40 cools the power cord 33 in the power cord chamber 33a.

In other words, the present embodiment prevents the abnormal temperature rise of the power cord 33. Subsequently, a third embodiment of the present invention will be described. In this embodiment, the cooling fan motor 40 is provided in the vicinity of the phase control circuit board using a triac equipped with a circuit (not shown) for controlling the electric blower 23.

Therefore, this embodiment can prevent an abnormal temperature rise of the high heat generating element such as a triac.

Next, fourth to sixth embodiments of the present invention will be described with reference to FIG. In the fourth embodiment, the cooling fan motor 40 is controlled by the control circuit 60 that controls the cooling fan motor 40 according to the suction pressure of the electric blower 23.

With the above construction, the control circuit 60 drives the cooling fan motor 40 when the suction pressure of the electric blower 23 decreases. Therefore, the present embodiment works effectively especially when the suction pressure is lowered and the cooling capacity is low.

In the fifth embodiment, the control circuit 60 controls the cooling fan motor 40 according to the amount of air blown by the electric blower 23.

Therefore, according to this embodiment, it works effectively especially when the air flow rate is small and the cooling capacity is low.

In the sixth embodiment, the control circuit 60 detects the temperature rise of the coil or the like which constitutes the electric blower 23, and when the temperature rise value exceeds a predetermined value, the cooling fan motor 40 is turned on. I'm trying to control it. Therefore, according to the present embodiment, the cooling effect can be exhibited with extremely high accuracy.

Next, the seventh embodiment of the present invention will be described with reference to FIG.
It will be described based on. Reference numeral 90 denotes a substantially disc-shaped cooling plate provided concentrically with the shaft 3 of the electric blower 23. Cooling plate 90
Is formed so as to be in contact with the child piece 2a of the commutator 2.

As described above, in this embodiment, since the cooling plate 90 is formed in contact with the child piece 2a of the commutator 2, the cooling plate 90 is formed.
The heat generated by the commutator 2 and the carbon brush 8 can be dissipated via the air conditioner, and the electric blower 23 can be effectively cooled.

[0043]

The first means of the present invention is provided between the electric blower provided in the electric blower chamber for sucking dust, and the electric blower chamber operated by the field coil voltage of the electric blower and the outer wall. (EN) An electric vacuum cleaner capable of preventing an excessive temperature rise of an electric blower as a configuration including a cooling fan motor and a cooling pipe for cooling the electric blower connected to the cooling fan motor.

In the second means of the present invention, in particular, the cooling fan motor is arranged between the power cord chamber for accommodating the power cord of the vacuum cleaner and the outer wall, and the abnormal temperature rise of the power cord is prevented. It realizes a possible electric vacuum cleaner.

In the third means of the present invention, in particular, the cooling fan motor is provided in the vicinity of the phase control circuit board on which the circuit for controlling the electric blower is mounted, thereby preventing an abnormal temperature rise of elements such as triacs. It realizes a possible electric vacuum cleaner.

In the fourth means of the present invention, particularly, the cooling fan motor is driven by the control circuit which controls the suction pressure of the electric blower, and the electric blower is efficiently cooled particularly when the suction pressure is low and the cooling capacity is small. It realizes a possible electric vacuum cleaner.

The fifth means of the present invention is an electric cleaning system capable of efficiently cooling an electric blower when the air flow rate is small and the cooling capacity is low, particularly as a structure in which a cooling fan motor is driven by a control circuit which controls the air flow rate of the electric blower. To realize the machine.

The sixth means of the present invention realizes an electric vacuum cleaner capable of cooling an electric blower with extremely high precision, particularly as a constitution in which a cooling fan motor is driven by a control circuit for controlling the temperature rise of the electric blower. Is.

The seventh means of the present invention realizes an electric vacuum cleaner which efficiently cools an electric blower with a substantially disk-shaped cooling plate which is concentric with the shaft of the electric blower.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an electric vacuum cleaner including an electric blower according to a first embodiment of the present invention.

[Fig. 2] Electric wiring diagram of the electric vacuum cleaner

FIG. 3 is a cross-sectional view of an electric vacuum cleaner including an electric blower according to a second embodiment of the present invention.

FIG. 4 is an electric wiring diagram of an electric vacuum cleaner showing fourth to sixth embodiments of the present invention.

FIG. 5 is a partially cutaway side view of an electric blower showing a seventh embodiment of the present invention.

FIG. 6 is a sectional view of a conventional vacuum cleaner.

FIG. 7 is a partially broken side view of the electric blower.

[Explanation of symbols]

 23 Electric Blower 23a Electric Blower Room 30 Electric Vacuum Cleaner Main Body 30a Outer Wall 33 Power Cord 33a Power Cord Chamber 40 Cooling Fan Motor 41 Cooling Pipe 60 Control Circuit 90 Cooling Plate

Claims (7)

[Claims] 1. An electric blower provided in an electric blower chamber for sucking dust, a cooling fan motor provided between an electric blower chamber operated by a field coil voltage of the electric blower and an outer wall, and a cooling fan motor. An electric vacuum cleaner having a cooling pipe for cooling the connected electric blower. 2. The electric vacuum cleaner according to claim 1, wherein the cooling fan motor is arranged between a power cord chamber for accommodating a power cord of the electric vacuum cleaner and an outer wall. 3. The electric vacuum cleaner according to claim 1, wherein the cooling fan motor is provided in the vicinity of the phase control circuit board on which a circuit for controlling the electric blower is mounted. 4. The electric vacuum cleaner according to claim 1, wherein the cooling fan motor is driven by a control circuit which is controlled by the suction pressure of the electric blower. 5. The electric vacuum cleaner according to claim 1, wherein the cooling fan motor is driven by a control circuit that controls the air flow rate of the electric blower. 6. The electric vacuum cleaner according to claim 1, wherein the cooling fan motor is driven by a control circuit that controls the temperature of the electric blower. 7. The electric cleaning according to claim 1, wherein a substantially disk-shaped cooling plate that is concentric with the shaft of the electric blower is brought into contact with a child piece of a commutator of the electric blower. Machine.