KR100346499B1 - Electric cleaner - Google Patents

Abstract

An electric vacuum cleaner in which exhaust from an electric blower incorporated in a cleaning main body is refluxed through a hose and a pipe to a suction device, etc., provides an electric vacuum cleaner capable of reducing the temperature rise of the refluxed air.

The lower case 3 constituting the cleaning base 1 is mounted with a separating wall 7 made of a material having high thermal conductivity at intervals between the rear surface of the lower case 3 and the separating wall ( The vacuum cleaner which formed the space between 7) and the lower case 3 into the reflux path which returns a part of exhaust of the electric blower 14. As shown in FIG.

Description

Electric vacuum cleaner {ELECTRIC CLEANER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly, to an exhaust reflux (circulating) type vacuum cleaner in which exhaust from an electric blower embedded in a cleaning main body is returned to a suction device or the like through a hose and a pipe.

In the general floor moving type vacuum cleaner, the exhaust from the electric blower built in the cleaning main body is discharged to the outside from the exhaust port formed on the back side of the main body, so that the entire amount of exhaust from the electric blower is discharged. And the exhaust air is blown away by the dust that has stagnated on the floor or the carpet, and diffuses into the room.

Therefore, in order to reduce the exhaust wind discharged from the exhaust port or to improve the dust collecting effect, for example, as disclosed in Japanese Unexamined Patent Publication No. 39-36553 or Japanese Unexamined Patent Publication No. 9-135795 BACKGROUND ART An electric vacuum cleaner in which a hose, a pipe, and a suction device connected to the main body are provided with an intake passage and an exhaust passage for refluxing the exhaust from the electric blower is proposed.

However, the exhaust gas refluxed from the electric blower to the suction mechanism increases in temperature as it passes through the electric blower. Since the air continues to be refluxed, the temperature of the refluxed air gradually rises, depending on the operating conditions. In some cases, there is a problem that adversely affects the durability of the components, in particular the hose.

SUMMARY OF THE INVENTION The present invention provides an electric vacuum cleaner which can reduce the temperature rise of refluxed air in an electric vacuum cleaner configured to return exhaust gas from an electric blower incorporated in a cleaning body to a suction mechanism or the like through a hose and a pipe. It is a task.

1 is a cross-sectional view of a cleaning base body according to an embodiment of the present invention.

2 is. Bottom view of the cleaning body.

3 is an enlarged cross-sectional view of a state in which a hose is connected to a hose connecting portion of the main body.

Fig. 4 is a side view of the hose breaking part of the above.

5 is a cross-sectional view of the grip portion.

6 is a longitudinal sectional view of the connecting pipe;

7 is a horizontal sectional view of the connecting pipe.

Fig. 8 is a side sectional view showing an overall configuration of the vacuum cleaner.

(Explanation of symbols for the main parts of the drawing)

1: basic body of cleaning 7: isolation wall

14: electric blower 21: hose

22: outer hose 23: inner hose

32: connecting pipe 33: suction mechanism

A2 to A6: intake passage B1 to B6: exhaust passage

The present invention provides a cleaning main body having a built-in electric blower, a flexible hose connected to the cleaning main body, a connecting pipe connected to the hose, an intake mechanism connected to the connecting pipe, and an exhaust of the electric blower. An electric vacuum cleaner having a reflux path for refluxing a mechanism, comprising: a connection port to which a hose is connected to the cleaning base, a dust collection chamber for communicating with the connection port to remove dust and the like drawn from the connection port; An electric blower chamber for sucking the removed air, and a reflux path for refluxing at least a part of the exhaust of the electric blower housed in the electric blower chamber, and a separation wall dividing the reflux path from the outside of the cleaning body with a thermal conductivity. It is formed by this high material. It is characterized by the above-mentioned.

The present invention also provides a cleaning main body having a built-in electric blower, a flexible hose connected to the cleaning main body, a connecting pipe connected to the hose, a suction mechanism connected to the connecting pipe, and an exhaust of the electric blower. In the vacuum cleaner having a reflux path for refluxing the suction mechanism, the cleaning main body is formed into an upper case and a lower case, and the dust collecting chamber and the electric blower chamber are formed in a space surrounded by the upper case and the lower case. At the same time, the lower case is equipped with an isolation wall formed of a material having high thermal conductivity at intervals between the rear surface of the lower case, and the space between the isolation wall and the lower case to reflux part of the exhaust of the electric blower. It is characterized in that formed in the reflux furnace.

The isolation wall is preferably formed of a material having a thermal conductivity of 2.5 (10 ⁻⁴ cal / cm · s · deg) or more.

The separating wall may be formed as a material made of synthetic resin.

Further, the isolation wall may be formed of a metal material.

(Example)

Embodiment of this invention is described in detail below based on drawing.

1 is a cleaning main body, and as shown in FIG. 1, the upper case 2, the lower case 3, the dust collection lid 4, and the isolation wall 7 mentioned later attached to the lower case 3 are mentioned. The hose connection port 5 to which the main body side hose connection part 17 mentioned later is connected is formed in the front side of the cleaning base body 1, and the exhaust port not shown is formed in the rear wheel 6. As shown in FIG.

The lower case 3 is equipped with a separating wall 7 formed of a material having a relatively high thermal conductivity at intervals between the rear surface of the lower case 3, and the separating wall 7 is a cleaning main body 1. The exhaust passage B1 is formed between the rear face of the lower case 3 and the isolation wall 7 so as to communicate with the hose connecting port 5.

In the present embodiment, the isolation wall 7 is made of polypropylene.

The polypropylene has a thermal conductivity of 2.8 (10 ⁻⁴ cal / cm · s · deg), and as a result of repeated experiments by the present applicant, if the thermal conductivity of the polypropylene is greater than or equal to the thermal conductivity of the polypropylene, in the hose 21 to be described later, The temperature rise of the air passing through the main body side hose connecting portion 17 side of the outer hose 22 can be suppressed to within 20 ° C.

Therefore, even in summer, the surface temperature of the outer hose 22 on the main body side hose connecting portion 17 side can be suppressed to within 50 ° C., which the user feels hot, thereby reducing the user's discomfort.

8 is a partition wall which stands upward from the bottom face of the said lower case 3, and divides the inside of the cleaning base body 1 back and forth.

9 is a dust collection chamber formed in the front side of the said partition wall 8, The hose insertion opening 9a is formed in the front side concentrically with the said hose connection opening 5.

In this dust collecting chamber 9, a dust collecting stand installation case 11 for freely fixing the dust collecting table 10 is also detachably stored therein, and the opening of the dust collecting table 10 is mounted in a mounted state. The hose insertion port 9a of the dust collecting chamber 9 is opposed.

12 is a fine filter attached to the said partition wall 8, and is located in the back side of the said dust collector 10, and remove | eliminates fine dust.

13 is an electric blower storage chamber formed at the rear side of the partition wall 8, and the electric blower 14 is enclosed and enclosed in the motor cover 15 therein.

The blower 14b is formed in the fan cover 14a, and the said electric blower 14 discharges a part of exhaust from the blower 14b, and transmits the remaining exhaust through the inside of the motor part 14c. The base 14c is cooled and then discharged.

On the lower side of the motor cover 15, openings 13a and 13b are formed so that the electric blower accommodating chamber 13 and the exhaust passage B1 and the external exhaust passage C communicate with each other.

16 is the filter arrange | positioned at the said opening opening 13b.

The exhaust from the blower port 14b is guided to the hose joint 5 side from the opening 13a through the exhaust flow path B1 by the driving of the electric blower 14, and at the same time, the electric blower 14 The exhaust gas passing through the electric motor portion 14c of the exhaust gas is discharged from the exhaust port to the outside of the cleaning main body 1 from the opening through the external exhaust flow path C and an exhaust filter not shown in the exhaust port.

17 is a main body side hose connection part connected to the hose 21 and attached to the hose connection port 5 mentioned later. As shown in FIG. 3, it consists of a cylindrical outer pipe 18 and an inner pipe 19. As shown in FIG. The part to which the hose 21 is connected is covered with the cover.

In the outer pipe 18, an outer rib 18b formed in a threaded shape at one end is inclined in the same direction as the winding direction of the outer hose 22. As shown in FIG.

On the other end side of the outer pipe 18, which is attached to the cleaning main body 1, a locking member 18a formed in the hose connecting port 5 is formed, and the locking member 18a is attached to the pressing plate 18b. It is not to fall out.

The inner pipe 19 is formed separately from the outer pipe 18, and one end of the inner pipe 19 is formed to be inclined in the same direction as the winding direction of the inner hose 23 is formed in the outer rib 19b.

The other end side connected to the hose connection port 5 of the inner pipe 19 is formed longer than the outer pipe 18 so as to protrude from the hose insertion hole 9a into the dust collecting chamber 9.

In addition, a plurality of support ribs 19a are formed on the outer circumference of the inner pipe 19 so as to be in contact with the inner circumference of the outer pipe 18, and the outer pipe 18 and the inner pipe 19 are screwed 18c. The fixing portion 19c to be fixed with is formed.

The main body side hose connecting portion 17 hangs and fastens the locking member 18a to the hose connecting portion 5 of the cleaning base 1 so that the inner pipe 19 of the main body side hose connecting portion 17 is fixed to the home. It protrudes into the truth 9 and communicates with the inside of the dust collecting chamber 9, and the inside of the inner pipe 19 is formed by the intake flow path A2.

In addition, the outer pipe 18 communicates with the exhaust flow path B1 in the cleaning main body 1, so that the outer pipe 18 and the inner pipe 19 are formed as the exhaust flow path B2.

21 is a hose which is attached to the main body side hose connection part 17 and the hose connection part 27 mentioned later, and is formed in the double structure which consists of the outer hose 22 and the inner hose 23 as shown in FIG. .

The outer hose 22 is formed in a tubular shape by spirally winding a long member made of a styrene-based elastomer, and joining the joint 22a at the widthwise end of the long member with a binder made of polypropylene. Spiral protrusions 22b and 22c are formed in substantially the center part of the width direction of this joining part 22a and the elongate member, respectively.

Conductive coils 22d and 22e as signal lines are incorporated in the projections 22b and 22c, and the strength of the hose 21 is improved by the projections 22b and 22c and the coils 22d and 22e. I'm making it.

In addition, the outer hose 22 is formed to be translucent, and the inner hose 23 is visible through the outer hose 22, thereby improving the design.

However, by making the outer hose 22 translucent, the coils 22d and 22e can be seen from the outer side, which may cause anxiety to the user. Therefore, the binder is added with a milky colorant to the polypropylene. The coils 22d and 22e are hard to see from the outside of the outer hose 22.

On the other hand, the inner hose 23 is spirally wound around a long member made of a styrene-based elastomer, and joins the joint 23a at the widthwise end of the long member with a binder made of polypropylene to form an annular shape. Spiral protrusions 23d and 23e are respectively formed in the substantially center portion of the joint portion 23a and the elongate member in the width direction.

The inner hose 23 is made opaque by adding a colorant to the styrene elastomer.

The hose 21 couples the outer ribs 18b of the outer pipe 18 to the outer hose 22, returns the outer pipe 18 to the outer hose 22, and at the same time, the inner hose 23. The outer ribs 19b of the inner pipe 19 are coupled to each other, and the inner hose 23 is screwed into the inner pipe 19.

Then, the screw 22 for fixing the pressing plate is screwed to the fixing portion 19c to fix the outer pipe 18 and the inner pipe 19.

As described above, by forming the outer pipe 18 and the inner pipe 19 separately, the work can be separately attached to the outer hose 22 and the inner hose 23, so the workability can be improved. At the same time, the hoses 22 and 23 can be prevented from being stressed due to torsion when the pipes 18 and 19 and the hoses 22 and 23 are mounted, thereby improving the durability of the hoses. I can do it.

The inner hose 23 communicates with the intake flow path A2 of the main body side hose connecting portion 17 to form the intake flow path A3, while between the outer hose 22 and the inner hose 23, the main body side hose connection portion ( It communicates with the exhaust flow path B2 of 17), and becomes the exhaust flow path B3.

In addition, since the winding direction of the inner hose 23 and the winding direction of the outer hose 22 are in the same direction, the inner hose 23 and the outer hose 22 are easily bent or twisted. This is the same direction.

Therefore, when the hose 21 is twisted or bent while using the cleaning main body 1, the outer hose 22 and the inner hose 23 are twisted or curved while following each other, so that the outer hose 22 and the inner hose are twisted or bent. The hose 23 is not mutually resisted against each torsion or bending, and the flexibility of the hose 21 is secured.

24 is a handle part, the bent pipe 25 to which the connection pipe mentioned later is mounted, the handle part integrally formed in the bent pipe 25, and one end is attached to the said bent pipe 25, and is provided in the other end side. It consists of the hose connection part 27 with which the hose 21 is mounted.

The hose connecting portion 27 is formed in a double structure consisting of a cylindrical outer pipe 28 and a cylindrical inner pipe 29 formed separately from the outer pipe, and the side on which the hose 21 is mounted is formed. The cover 31 is provided so that it may cover.

At one end of the outer pipe 28, similar to the outer ribs 18B of the outer pipe 18 of the main body side hose connecting portion 17, the outer ribs 28a to which the outer hoses 22 are coupled are the outer hoses 22. ) Is inclined in the same direction as the winding direction.

In addition, on the inner circumference of the other end side of the outer pipe 28, a positioning projection 28b is formed at a position at a predetermined distance from the end.

As for the inner pipe 29, the inner rib 29a to which the inner hose 23 is rotated is made to the outer periphery of one end like the outer rib 19b of the inner pipe 19 of the main body side hose connection part 17. It is formed to be inclined in the same direction as the winding direction of the inner hose (23).

Moreover, on the outer periphery of the other end side of the said inner pipe 29, the support rib 29b which abuts on the inner periphery of the outer pipe 28 in the axial direction of a pipe | tube is formed, and the support rib 29b is made into the outer pipe ( The inner pipe 29 is positioned in contact with the projection 28b and the bent pipe 25 of the 28, and the inner pipe 29 is rotatably supported.

The hose connecting portion 27 is assembled in the same manner as the main body side hose connecting portion 17 and improves assembly workability by forming the outer pipe 28 and the inner pipe 29 separately.

In addition, since the outer pipe 28 and the inner pipe 29 are configured to rotate freely, the torsion due to the aging change of the inner hose 23 with respect to the outer hose 22, manufacturing errors, etc. can be eliminated, and the hose It is possible to prevent the stress due to the torsion of the 21 to improve the durability of the hose 21.

In addition, when the length of the outer hose 22 and the inner hose 23 is different, the outer hose 22 and the inner hose (by adjusting the insertion clearance to the outer pipe 28 and the inner pipe 29) are adjusted. 23) the length can be adjusted.

An exhaust passage B4 is formed between the outer pipe 28 and the inner pipe 29 to communicate with the exhaust passage B3 of the hose 21.

In addition, an intake passage A4 is formed in the inner pipe 29 to communicate with the intake passage A3 in the hose 21.

The bent pipe 25 is provided with a mounting hole 25a to which a connecting pipe 32 to be described later is mounted, and a clamp 25b is provided above the mounting hole 25a.

In addition, a cylindrical portion 30 is formed inside the bent tube 25 to communicate with a mounting hole 25a and to insert an end portion of the inner pipe 29 into an inner portion of the cylindrical portion 30. The inner pipe 29 and the outer pipe are formed between the outer side of the cylindrical portion 30 and the outer edge of the handle portion 24 while being in communication with the intake passage A4 of the pipe 29 to form the intake passage A5. The exhaust flow path B5 is formed in communication with the exhaust flow path B4 formed by 28.

32 is a connection pipe which is fixed to the clamp 25b and is attached to the mounting opening 25a of the handle portion 24, and is formed by connecting two pipes 32a.

The connecting pipe 32 has an outer cylindrical portion 32b having a substantially circular cross section, and an inner cylindrical portion having an upper portion integrally formed with the outer cylindrical portion 32b eccentrically with the outer cylindrical portion 32b. It is comprised as 32c, and the crescent-shaped space is formed by the inner side cylindrical part 32c and the outer side cylindrical part 32b.

When the connecting pipe 32 is attached to the handle portion 24, the inner cylindrical portion 32c communicates with the intake passage A5 of the handle portion 24 to form an intake passage A6 therein. At the same time, between the outer cylindrical portion 32b and the inner cylindrical portion 32c communicates with the exhaust passage B5 of the handle portion 24 to form the exhaust passage B6.

In addition, since the exhaust gas passing through the exhaust passage B6 is clean air from which dust is removed through the dust collecting table 10 and the dust filter 12 of the cleaning main body 1, the inner cylindrical portion 32c and In view of the fact that the cross section is not required to be formed in a substantially circular shape in consideration of dust clogging as described above, in this embodiment, as described above, the cross section of the exhaust flow path B6 has a substantially crescent shape, and the outer cylindrical portion ( The cross section of 32b) is formed to be substantially circular.

33 is a suction mechanism connected to the connecting pipe 32. The rotary brush 33a is rotatably housed therein, and exhaust gas returned through the hose 21 and the connecting pipe 32 is rotated by the rotary brush 33a. The rotary brush 33a is rotated by blowing on the blade of the blade.

In the use of the vacuum cleaner configured as described above, the air mixed with the dust sucked from the suction mechanism 33 is sucked by the electric blower 14 so that the air intake passage A5 of the connecting pipe 32 and the hose ( 21 is introduced into the cleaning main body 1 through the intake passage A3.

In the cleaning main body 1, dust is removed from the dust collecting stand 10, and the air cleaned by the dust filter 12 is sucked into the electric blower 14 to cool the electric blower 14.

Part of the exhaust from the electric blower 14 is discharged to the outside from the exhaust port of the cleaning main body 1, and the rest passes through the exhaust flow path B1 of the cleaning main body 1, and the exhaust flow path B1. ) Is formed of a material having a relatively high thermal conductivity, so that the heat of the exhaust gas passing through the exhaust flow path B1 is transferred to the outside through the isolation wall 7. Since the temperature of the exhaust gas to be refluxed decreases due to heat dissipation, the temperature of the exhaust gas to be refluxed can be suppressed gradually with the passage of the use time.

Therefore, since the temperature rise of the hose 21 and the connection pipe 32 can be suppressed, the user's discomfort can be reduced, and the durability of the hose 21 and the like can be improved.

By refluxing a part of the exhaust gas as described above, the exhaust wind discharged to the outside is reduced and weakened, so that dust in the room can be effectively suppressed during cleaning.

In this embodiment, although the isolation wall 7 is formed of polypropylene, a synthetic resin material having a higher thermal conductivity, polyvinyl chloride (thermal conductivity of 5 to 18 (10 ^-4 cal / cm · s · deg)), It may be used such as an acrylonitrile butadiene styrene [thermal conductivity ^{4.5~8.0 (10 -4 cal / cm ·} s · deg)].

Moreover, you may use synthetic resins, such as a polystyrene and an acetal homopolymer.

By constructing the isolation wall 7 with a synthetic resin having high thermal conductivity, the appearance discomfort with the upper case 2 or the lower case 3 can be eliminated, and even if the temperature of the isolation wall 7 rises, the metal or the like is removed. Since the thermal conductivity is low in comparison, there is an effect that does not feel hot even when the user inadvertently contacts.

In addition, when the temperature of the refluxed air is high due to the performance of the electric blower or the configuration of the reflux path, or when the temperature of the refluxed air is to be further reduced, the isolation wall 7 is made of metal such as aluminum or iron. In addition, since the isolation wall 7 is disposed on the bottom surface of the cleaning main body 1, the user does not come into contact during cleaning, and there is no problem of the user getting burned even if the thermal conductivity is high.

In general, since metals have a thermal conductivity of 10 times or more that of synthetic resins, the use of metals can more effectively dissipate the refluxed air.

In this embodiment, although the isolation wall 7 was made into a separate component, the isolation wall 7 is integrally formed with the lower case 3, and the lower case 3 whole is made of a material having high thermal conductivity. You may also do it.

Also in this structure, the effect similar to embodiment mentioned above can be exhibited.

Moreover, in this structure, it is preferable to make the wall surface which partitions the electric blower chamber 13 and the exhaust flow path B1, and the wall surface which partitions the dust collecting chamber 9 and the exhaust flow path B1 into separate components.

According to the present invention, heat of refluxed air can be dissipated through the isolation wall, and thus the temperature of the hose or the like can be reduced, so that discomfort can be reduced even when the user touches the hose or the like, and the durability of the hose or the like is improved It is effective to make it.

Claims (5)

The cleaning main body is formed with a connection port, a dust collection chamber communicating with the connection port to remove dust and the like drawn from the connection port, and an electric blower chamber that sucks air from which dust is removed from the dust collection chamber. An electric vacuum cleaner comprising: a flexible hose connected to a connection port of a; a connecting pipe connected to the hose; a suction device connected to the connection pipe; and a reflux path for returning exhaust of the electric blower to the suction device. A reflux path for refluxing at least a part of the exhaust of the electric blower accommodated in the electric blower chamber, and an outer wall of the cleaning base body constituting one side wall of the reflux path is formed of a material having high thermal conductivity. vacuum cleaner. A cleaning main body having a built-in electric blower, a flexible hose connected to the cleaning main body, a connecting pipe connected to the hose, an intake mechanism connected to the connecting pipe, and exhaust of the electric blower to the suction mechanism. In the vacuum cleaner having a reflux path, The cleaning main body is formed of an upper case and a lower case, and a dust collecting chamber and an electric blower chamber are formed in a space surrounded by the upper case and a lower case, and spaced between the lower case and the rear surface of the lower case. It is equipped with a separating wall formed of a material having high thermal conductivity, A vacuum cleaner comprising a space between the separation wall and the lower case as a reflux path for refluxing part of the exhaust of the electric blower. The method according to claim 1 or 2, The separator is formed of a material having a thermal conductivity of 2.5 (10 ⁻⁴ cal / cm · s · deg) or more. The method according to claim 1 or 2, And said isolation wall is formed of a material made of synthetic resin. The method according to claim 1 or 2, And said isolation wall is formed of a metal material.