KR100390500B1 - Vacuum cleaner - Google Patents

Abstract

The present invention relates to a vacuum cleaner, comprising: a casing configured to form a receiving space therein and having a first suction opening and a second suction opening at a bottom thereof so as to communicate with the outside; A suction pump accommodated in the casing and generating suction force; An exhaust reflux tube having one end coupled to the discharge side of the suction pump to reflux a portion of the fluid discharged from the suction pump; An ejector nozzle unit formed at a distal end of the exhaust reflux pipe so that fluid flowing along the exhaust reflux pipe is injected at a relatively high speed; An ejector chamber portion having a cylindrical shape and arranged to receive the ejector nozzle portion therein along the ejecting direction of the fluid of the ejector nozzle portion; One end thereof is connected to the ejector chamber part so as to be in communication with each other, and at least one of the first suction port and the second suction port is accommodated so as to be exposed to the outside, and at least part of the edge of the exposure area along the circumferential direction is provided. It characterized in that it comprises an ejector suction nozzle having a concave-convex cross-sectional shape. Thereby, a vacuum cleaner is provided in which pressure loss can be suppressed to increase the suction power of the ejector.

Description

Vacuum Cleaner {VACUUM CLEANER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner capable of suppressing pressure loss and increasing suction power of an ejector.

In general, the vacuum cleaner is coupled to the casing is formed in the inlet and outlet, the suction pump accommodated to generate a suction force in the casing, and the lower portion of the casing in communication with each other to suck the foreign matter of the bottom surface with the fluid It has a suction head.

Some of these vacuum cleaners have a vacuum cleaner in which an exhaust reflux path is formed so that a part (or all) of the exhaust discharged from the suction pump can be returned to the suction side so that an air cleaning function is added.

Meanwhile, an ejector nozzle and an ejector having an ejector chamber part are formed to form a relatively low pressure region around the ejector nozzle so that the fluid can be injected at a relatively high speed in the exhaust return path of the vacuum cleaner, and the ejector chamber part is externally mounted. The flow path system of the vacuum cleaner, which is in communication with, has been previously filed in the name of the applicant.

1 is a view showing an ejector area of a conventional vacuum cleaner. As shown, the ejector of the vacuum cleaner is formed in the distal region of the exhaust reflux tube 115 for refluxing part of the fluid flowing out of the discharge region of the suction pump (not shown) to eject the refluxed fluid at low pressure and high pressure It has a nozzle portion 121 and an ejector chamber portion 123 disposed around the ejector nozzle portion 121 to form a low pressure space therein. An outlet tube 125 is formed at the outlet side end of the ejector chamber 123 so that the flow cross-sectional area is gradually increased, and the ejector suction tube 127 is coupled to the opposite end in communication with each other.

The ejector suction pipe 127 is coupled with the ejector suction nozzle 129 downwardly opened, and the ejector suction nozzle 129 has a suction port 112 penetrated to the bottom of the suction head 111 to suck fluid from the outside. It is installed to surround.

By the way, in the conventional vacuum cleaner, the ejector suction nozzle 129 is provided to surround the suction port 112 inside the suction head 111, the suction head 111 is the bottom surface by a moving wheel (not shown) The foreign material is sucked to the outside in a predetermined distance from the state, the pressure loss is generated relatively, due to this there is a problem that the suction force acting on the ejector suction nozzle 129 is relatively weak.

It is therefore an object of the present invention to provide a vacuum cleaner which can suppress pressure loss and increase the suction force of the ejector.

1 is a view showing an ejector area of a conventional vacuum cleaner,

2 is a longitudinal sectional view of the vacuum cleaner according to an embodiment of the present invention;

3 is an enlarged cross-sectional view of the main part of FIG. 2;

4 is an enlarged perspective view of the ejector suction nozzle region of FIG. 3;

FIG. 5 is a plan sectional view taken along the line VV of FIG. 4.

Explanation of symbols on the main parts of the drawings

11 body casing 21 suction head

23: first inlet 24: second inlet

25: nozzle lifting guide 26: suction nozzle

27: rod portion 28: suction pipe

29: lifting operation handle 30a, 30b: rod accommodation

31: suction pump 33: filter member

35: filter casing 37: exhaust reflux pipe

39: ejector nozzle portion 41: ejector chamber portion

43: ejector suction nozzle 44: first uneven portion

45: second uneven portion 48: ejector suction pipe

According to the present invention, a casing for forming a receiving space therein and the first suction port and the second suction port is formed in the bottom so as to communicate with the outside; A suction pump accommodated in the casing and generating suction force; An exhaust reflux tube having one end coupled to the discharge side of the suction pump to reflux a portion of the fluid discharged from the suction pump; An ejector nozzle unit formed at a distal end of the exhaust reflux pipe so that fluid flowing along the exhaust reflux pipe is injected at a relatively high speed; An ejector chamber portion having a cylindrical shape and arranged to receive the ejector nozzle portion therein along the ejecting direction of the fluid of the ejector nozzle portion; One end thereof is connected to the ejector chamber part so as to be in communication with each other, and at least one of the first suction port and the second suction port is accommodated so as to be exposed to the outside, and at least part of the edge of the exposure area along the circumferential direction is provided. It is achieved by a vacuum cleaner comprising an ejector suction nozzle having a concave-convex cross-sectional shape.

Here, the ejector suction nozzle is preferably provided to be liftable between the exposed position where the suction region is exposed from the casing and the retracted position that is withdrawn to be accommodated in the casing.

And, it is effective to further include a nozzle lifting guide portion disposed inside the casing to receive the ejector suction nozzle to guide the lifting.

It is preferable that the ejector suction nozzle further comprises a nozzle lifting means for elevating between the exposed position and the retracted position.

In addition, the ejector suction nozzle is provided with a first uneven portion and a second uneven portion disposed to face each other along the advancing edge of the casing, and the first uneven portion and the second uneven portion are formed in the casing. It is effective that recesses and convex portions are alternately formed with respect to the direction.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

2 is a longitudinal cross-sectional view of the vacuum cleaner according to an embodiment of the present invention, FIG. 3 is an enlarged cross-sectional view of the main part of FIG. 2, FIG. 4 is an enlarged perspective view of the ejector suction nozzle region of FIG. 3, and FIG. 5 is of FIG. 4. This is a cross sectional view along the VV line. As shown in these figures, the vacuum cleaner includes a suction head 21 having a first suction port 23 and a second suction port 24 formed in the bottom area so as to communicate with the outside, and an upper side of the suction head 21. A casing having a main body casing 11 disposed therein to form a receiving space therein, a suction pump 31 accommodated inside the main body casing 11 to generate suction force, and a fluid discharged from the suction pump 31. An exhaust reflux tube 37 having one end coupled to the discharge side of the suction pump 31 and a fluid flowing along the exhaust reflux tube 37 in an end region of the exhaust reflux tube 37 so that a portion of the reflux can be refluxed Ejector nozzle portion 39 is formed to be injected at a relatively high speed, the ejector chamber portion having a cylindrical shape and arranged to receive the ejector nozzle portion 39 therein along the ejection direction of the fluid of the ejector nozzle portion 39 41 and one end communicate with the ejector chamber 41. Is connected to the second suction port 24 so that at least the suction area can be exposed to the outside, and the first uneven part 44 and the second uneven part 45 are disposed to face each other along the circumferential direction at the edge of the exposed area. It has an ejector suction nozzle 43 formed.

The handle 13 is installed in the upper rear region of the main body casing 11 to extend in the vertical direction, and the suction pump 31 is provided in the upper front region. The lower side of the suction pump 31 is provided with a filter member 33 to block foreign substances, the filter casing to collect the foreign matter blocked by the filter member 33 in the peripheral region of the filter member (33) 35) is detachably coupled.

The suction head 21 is provided below the main body casing 11, and the first suction port 23 and the second suction port 24 are spaced apart from each other by a predetermined distance in the bottom region of the suction head 21 along the front and rear directions. It is penetrated. A suction nozzle 26 is provided at the first suction port 23, and the other end of the suction pipe 28 connected to the inlet side of the filter casing 35 is connected to the suction nozzle 26 so as to communicate with each other.

Meanwhile, an exhaust port 32 is formed at one side of the suction pump 31 to discharge the sucked fluid, and at one side of the exhaust port 32, an exhaust reflux pipe 37 may return some of the discharged fluid. One end of) is combined.

The exhaust reflux tube 37 extends downward along the up and down direction of the main body casing 11, and the fluid flowing along the exhaust reflux tube 37 can be injected at a low pressure and high pressure in the distal region of the exhaust reflux tube 37. The ejector nozzle 39 is formed.

An ejector chamber part 41 is provided along the up and down direction in the circumferential region of the ejector nozzle part 39 so that the ejector nozzle part 39 is accommodated therein, and at the upper end of the ejector chamber part 41. Expansion tube 42 is coupled so that the flow cross-sectional area is gradually increased. The expansion pipe 42 is connected to the inlet side 28 in communication with the suction pipe 28 before the inlet of the filter casing 35.

On the other hand, one end of the ejector suction tube 48 is connected to the lower side of the ejector chamber 41, the ejector suction tube 48, the lower end of the ejector suction tube 48, the ejector suction accommodated so as to be able to lift inside the second suction port 24 The nozzles 43 are connected in communication with each other.

The ejector suction nozzle 43 has a substantially rectangular cylindrical shape that is downwardly opened, and the edges 46a and convex portions along the circumferential direction are provided at edges that are mutually disposed along the advancing direction of the suction head 21 and the main body casing 11. The first uneven portion 44 and the second uneven portion 45 each of which 46b) are alternately formed are formed. As shown in FIG. 5, the first uneven portion 44 and the second uneven portion 45 have a recess 46a and a convex portion 46b with respect to the advancing direction of the main body casing 11 and the suction head 21. Are formed so as to alternate with each other.

The ejector suction nozzle 43 is accommodated in the second suction opening 24 so that the ejector suction nozzle 43 receives the first uneven portion 44 and the second uneven portion 45 through the second suction opening 24. The nozzle elevating guide portion 25 is formed to guide the elevating between the exposed position exposed to the exposed position and the withdrawn position withdrawn into the suction head 21.

The rod part 27 is fixed to the rear edge of the nozzle elevating guide part 25 and the suction head 21 so that one end can be lifted up and down integrally with the ejector suction nozzle 43 and the other end is exposed to the outside of the suction head 21. The rod accommodation hole (30a, 30b) is formed to have a long hole shape in the vertical direction to pass through). An elevating operation knob 29 is integrally formed in the exposed end region of the rod portion 27 so as to elevate the ejector suction nozzle 43 which extends along the width direction and is integrally connected to the rod portion 27.

By such a configuration, when power is applied to the suction pump 31, suction of the fluid is started from the outside through the first suction port 23, and the fluid and the foreign substance sucked through the first suction port 23 are suction pipes 28. It flows upward along the flow into the filter casing (35).

The foreign matter introduced into the filter casing 35 is blocked by the filter member 33 and collected in the filter casing 35, and is sucked into the suction pump 31 through the filter member 33 and discharged. Some of the fluid is discharged to the outside through the exhaust port 32, and some flows along the exhaust reflux tube 37 and is injected at a low pressure and high speed through the ejector nozzle 39.

Accordingly, the inside of the ejector chamber portion 41 has a relatively low pressure compared to the surrounding area, and the inside of the ejector chamber portion 41 sucks fluid and foreign matter from the outside through the ejector suction nozzle 43. Fluid and foreign matter sucked into the ejector chamber part 41 are sucked into the filter casing 35 through the suction pipe 28 via the expansion pipe 42.

On the other hand, when cleaning an object requiring a relatively large suction force, such as a carpet, the elevator operation knob 29 is moved downward to expose the ejector suction nozzle 43 to the outside through the second suction opening (24). Be sure to Then, each of the convex portions 46b of the first concave-convex portion 44 and the second concave-convex portion 45 is in contact with the target surface so that a proper suction force acts on the inside of the ejector suction nozzle 43, and each concave portion 46a is provided. Through the fluid and foreign matter is sucked in from the outside.

At this time, the first concave-convex portion 44 and the second concave-convex portion 45 are formed such that the concave portion 46a and the convex portion 46b are alternately disposed with respect to the advancing direction of the suction head 21 so that the object Effectively inhale foreign matter.

In the above-described and illustrated embodiments, the case in which the ejector suction nozzle is configured to be elevated by manual operation has been described as an example. However, it is possible to provide a driving means such as an electric motor or a solenoid to be easily elevated by a switch operation. Of course.

As described above, according to the present invention, an ejector nozzle portion which forms a first suction port and a second suction port at the bottom of the suction head, and injects the fluid flowing back from the suction pump in the second suction port region at high speed; By disposing the ejector chamber portions arranged around each other, the ejector suction nozzles having one end connected to the ejector chamber portion and the contact area of the target surface having an uneven section are arranged at the second inlet port, thereby suppressing the pressure loss and thus the suction force of the ejector chamber portion. A vacuum cleaner that can increase the number is provided.

Further, according to the present invention, the ejector suction nozzle is configured to be lifted with respect to the suction head, and when the floor surface such as the floor is cleaned, the ejector suction nozzle is withdrawn to the inside of the suction head and a relatively large suction force such as a carpet is applied. If necessary, by exposing the ejector suction nozzles, there is provided a vacuum cleaner that can effectively suppress the pressure loss and effectively absorb the foreign matter.

In addition, the vacuum cleaner according to the present invention allows the recesses and the convex portions to be alternately formed at the edges disposed before and after the suction head in the exposed end region of the ejector suction nozzle, so that foreign matter is effectively sucked from the object.

Claims (5)

A casing for forming a receiving space therein and having a first suction hole and a second suction hole formed at a bottom thereof so as to communicate with the outside; A suction pump accommodated in the casing and generating suction force; An exhaust reflux tube having one end coupled to the discharge side of the suction pump to reflux a portion of the fluid discharged from the suction pump; An ejector nozzle unit formed at a distal end of the exhaust reflux pipe so that fluid flowing along the exhaust reflux pipe is injected at a relatively high speed; An ejector chamber portion having a cylindrical shape and arranged to receive the ejector nozzle portion therein along the ejecting direction of the fluid of the ejector nozzle portion; One end thereof is connected to the ejector chamber part so as to be in communication with each other, and at least one of the first suction port and the second suction port is accommodated so as to be exposed to the outside, and at least part of the edge of the exposure area along the circumferential direction is provided. A vacuum cleaner comprising an ejector suction nozzle having an uneven section shape. The method of claim 1, And the ejector suction nozzle is installed to be liftable between an exposed position where the suction region is exposed from the casing and a withdrawn position that is withdrawn so as to be accommodated inside the casing. The method of claim 2, And a nozzle lifting guide part disposed inside the casing to receive the ejector suction nozzle and guide the lifting and lowering. The method of claim 3, And a nozzle elevating means for elevating said ejector suction nozzle between said exposed position and said retracted position. The method according to any one of claims 1 to 4, The ejector suction nozzle has a first uneven portion and a second uneven portion disposed to face each other along edges of the casing, and the first uneven portion and the second uneven portion are formed in the advancing direction of the casing. And a recess and an iron portion are alternately formed with respect to each other.