KR20020038266A - Exhaust air feed back vacuum cleaner - Google Patents

Abstract

PURPOSE: An exhaust air reflux vacuum cleaner is provided to increase relatively a suction function or an air cleaning function by refluxing selectively at least a part of air exhausted from a suction pump to an absorbing side of a suction pump. CONSTITUTION: An exhaust air reflux vacuum cleaner comprises a casing(10) having a first and a second air inlet(12a,12b) and an exhaust port(17), a suction pump(20) for generating an absorbing force, a filter member(30) for blocking a waste material, a filter casing(40) for collecting the waste material, a first absorbing passage(21) formed to interconnect the first air inlet(12a) and the filter casing(40), an exhaust air reflux passage(23) formed to reflux the air exhausted from the suction pump(20) to the absorbing side of the filter casing(40), and a reflux switching valve(50) for opening and closing the exhaust air reflux passage(23).

Description

EXHAUST AIR FEED BACK VACUUM CLEANER}

The present invention relates to an exhaust reflux vacuum cleaner, and more particularly, by selectively refluxing at least a portion of the fluid discharged from the suction pump to the suction side of the suction pump, thereby increasing either of the suction function and the air cleaning function. An exhaust reflux vacuum cleaner is provided.

In general, a vacuum cleaner includes a casing having a suction port and an exhaust port, a suction pump accommodated in the casing to generate suction force, and a filter member disposed at the suction side of the suction pump to block foreign substances sucked with the fluid. Equipped.

The exhaust reflux vacuum cleaner is a kind of vacuum cleaner in which at least part of the fluid discharged from the suction pump is refluxed to the suction side.

1 is a longitudinal sectional view of a conventional exhaust reflux vacuum cleaner. As shown, the exhaust reflux cleaner includes a main body casing 111 having an accommodation space therein, a suction casing 113 disposed below the main body casing 111, and a main body casing 111. It is configured to include a suction pump 115 to be accommodated, and a filter member 117 disposed on the suction side of the suction pump 115 to receive foreign matter therein. The upper portion of the main body casing 111 is formed so that the handle 119 is extended upward, the control unit 121 is provided on the upper side of the filter member 117.

Meanwhile, a suction port 123 is formed at the bottom of the suction casing 113 to communicate with the outside so as to suck the fluid from the outside, and the suction port 123 has a filter member 117 having a bag shape. Suction passage 125 is formed to be introduced into the inside of). An exhaust reflux path 127 is formed at one side of the suction pump 115 to return the fluid discharged from the suction pump 115 to the suction port 123.

By this configuration, when the suction pump 115 is driven by the control unit 121, the fluid and foreign matter is sucked from the outside through the suction port 123, the sucked fluid and foreign matter is introduced into the filter member 117. . The foreign matter is collected inside the filter member 117, and the fluid passes through the filter member 117 and flows along the exhaust reflux path 127 via the suction pump 115. The fluid returned to the inlet 123 is circulated while being sucked along the suction path 125 together with the fluid sucked from the outside of the suction casing 113 and refluxed through the exhaust reflux path 127. Will be removed by suction.

However, in such a conventional exhaust reflux vacuum cleaner, the fluid suctioned from the outside of the suction casing 113 to the suction port 123 side and the fluid refluxed through the exhaust reflux path 127 and injected into the suction port 123 region are in conflict. As a result, the suction force is substantially lowered, which makes it difficult to inhale / remove foreign particles having a relatively large particle size.

Accordingly, an object of the present invention is to provide an exhaust reflux vacuum cleaner capable of relatively increasing either of the suction function and the air cleaning function by selectively returning at least a portion of the fluid discharged from the suction pump to the suction side of the suction pump. To provide.

1 is a longitudinal sectional view of a conventional exhaust reflux vacuum cleaner,

Figure 2 is a longitudinal cross-sectional view of the exhaust reflux vacuum cleaner according to an embodiment of the present invention,

3 is an enlarged view illustrating main parts of FIG. 2;

4 is a view showing the main parts of the exhaust reflux vacuum cleaner according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

11: suction casing 12a: first suction port

12b: second inlet 13: main body casing

14 suction tube 17 exhaust port

19: exhaust pipe 20: suction pump

21: first suction passage 23: exhaust reflux furnace

25: second suction passage 30: filter member

41: ejector nozzle 43: ejector chamber

44: connecting member 50: reflux opening and closing valve

53: valve driving part

According to the present invention, there is provided a housing space therein, the inlet and the exhaust port is formed with a casing; A suction pump accommodated in the casing and generating suction force; A filter member disposed on a suction side of the suction pump to suppress foreign substances from flowing into the suction pump; A filter casing connected to the suction side of the suction pump to collect the foreign matter blocked by the filter member so that the filter member is accommodated therein; A first suction path having one end connected to the suction port and the other end communicating with the filter casing; An exhaust reflux path having one end connected to the discharge side of the suction pump and the other end connected to the inflow side of the filter casing so that at least a part of the fluid discharged from the suction pump is introduced into the filter casing; It is achieved by an exhaust reflux vacuum cleaner disposed in the exhaust reflux path and including a reflux path opening and closing valve for selectively opening and closing the exhaust reflux path.

Here, further comprising a valve driving means for driving the reflux path opening and closing valve between the blocking position for inhibiting the inflow of fluid into the exhaust reflux path and the open position for the fluid to flow through the exhaust reflux path. It is preferable.

The ejector nozzle is formed so that the velocity of the fluid is injected into the exhaust reflux path and the ejector nozzle is formed so that the downstream region of the ejector nozzle communicates with the outside of the exhaust reflux path in the peripheral area of the ejector nozzle. It is effective to configure to include more chambers.

In addition, it is preferable that the one end is in communication with the outside of the casing and the other end is configured to further include a second suction path is formed to be in communication with the ejector chamber to be able to suck the fluid from the outside.

In addition, it is effective to configure the outlet side end portion of the exhaust reflux passage to merge with the first suction passage before entering the interior of the filter casing.

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 exhaust reflux vacuum cleaner according to an embodiment of the present invention, Figure 3 is an enlarged view of the main portion of FIG. As shown in these figures, the present exhaust reflux vacuum cleaner includes a casing 10 and a casing (10) in which an accommodating space is formed, and the first and second inlets 12a and 12b and the exhaust port 17 are formed. 10 is disposed around the suction member 20, the filter member 30 disposed on the suction side of the suction pump 20 to block foreign matters, and the filter member 30. A filter casing 40 for collecting foreign substances, a first suction path 21 formed to interconnect the first suction port 12a and the filter casing 40 so that fluid may be sucked and flow therein, and a suction pump 20 The exhaust discharge path 23 is formed to return the fluid discharged from the filter to the suction side of the filter casing 40, and the reflux path opening and closing valve 50 for opening and closing the exhaust reflux path (23).

The casing 10 includes a suction casing 11 having a first suction opening 12a and a second suction opening 12b formed on the bottom thereof, and a main body casing disposed above the suction casing 11, respectively. Has (13). The suction pump 20 is accommodated in the upper region of the main body casing 13, and the filter casing 40 is detachably coupled to the suction side of the suction pump 20 at the same time.

One end of the filter casing 40 is connected to the first suction port 12a and the connection member 44 having an almost “T” shape in communication with the suction pipe 14 forming the first suction path 21 therein. Outflow side ends of the are coupled to communicate with each other, the inside of the filter casing 40, the filter member 30 having a cylindrical shape is accommodated.

An exhaust port 17 is formed at the discharge side of the suction pump 20, and one end of an exhaust pipe 19 having an exhaust return path 23 formed therein is coupled to the exhaust port 17 so as to communicate with each other. The ejector nozzle 41 is formed in the other end region of the side 19 so that the flow cross-section is gradually reduced so that the fluid flowing along the exhaust reflux path 23 can be injected at a relatively high speed. The ejector chamber 43 is formed in the circumferential region of the ejector nozzle 41 so as to form a low pressure region in which the internal space is relatively low in pressure.

One end of the connection member 44 is formed at the outlet end of the ejector chamber 43 so that the flow cross-sectional area is gradually increased to gradually increase the pressure of the fluid. The suction pipe 14 is connected.

The other end portion region of the ejector chamber 43 is connected to the second suction opening 12b formed along the vertical direction and formed in the bottom region of the suction casing 11 so that fluid can be sucked from the outside into the ejector chamber 43. The second suction passage 25 is formed.

On the other hand, the exhaust pipe 19 is provided with a reflux path opening and closing valve 50 to open and close the exhaust flow path 23, one side of the exhaust pipe 19, the reflux path opening and closing valve 50 in the flow direction of the fluid. The valve accommodating part 22 is formed so that it may retract horizontally and open the exhaust flow path 23. One side of the valve accommodating part 22 has a valve driving part for driving between a shutoff position at which the reflux path opening and closing valve 50 blocks the exhaust reflux path 23 and an open position withdrawn inside the valve accommodating part 22 ( 53).

The valve driving part 53 includes a magnetic rod 55 having one end integrally coupled to one side of the reflux opening / closing valve 50 and the other end extending to be exposed to the outside of the valve accommodation part 22, and the magnetic rod 55. The tubular bobbin 57 disposed around the periphery, the coil 59 wound around the bobbin 57, and the inside of the bobbin 57 are accommodated, and the reflux opening / closing valve 50 is provided with a valve accommodating part ( It is configured to include a spring member 61 for applying an elastic force to the magnetic rod (55) to be withdrawn to 22).

By such a configuration, when power is supplied to the suction pump 20 to start driving, suction of the fluid and the foreign matter is made through the first suction port 12a, and the sucked fluid and the foreign matter are transferred to the first suction path 21. As a result, the filter casing 40 flows into the interior. The foreign matter introduced into the filter casing 40 is blocked by the filter member 30 to be collected in the filter casing 40, and the fluid passing through the filter member 30 is discharged to the exhaust port 17.

When the air cleaning function is to be strengthened, when the operation switch (not shown) is placed in the open position, the power is cut off to the coil 59 so that the reflux opening / closing valve 50 is in contact with the magnetic rod 55. By the elastic force of 61, it is withdrawn inside the valve accommodation part 22 in an open position.

When the exhaust reflux path 23 is opened, a part of the fluid discharged to the exhaust chamber 15 flows into the exhaust pipe 19 and flows at high speed toward the inside of the connecting member 44 through the ejector nozzle 41. Sprayed.

As a result, the inside of the ejector chamber 43 has a relatively low pressure compared to the outside of the suction casing 11 to form a low pressure region, and the second suction connecting the ejector chamber 43 and the second suction port 12b to each other. The suction of the fluid from the outside of the suction casing 11 is made through the furnace 25. Fluid and foreign matter introduced into the ejector chamber 43 are introduced into the connecting member 44 through a gap between the ejector nozzle 41 and the connecting member 44 and sucked into the first suction path 21. Joined with the foreign matter is introduced into the filter casing (40).

On the other hand, when the cleaning function is to be strengthened, power is applied to the coil 59 by operating an operation switch (not shown) so that the suction force of the fluid can be relatively increased. When power is applied to the coil 59, the magnetic rod 55 is moved so that the spring member 61 is compressed along the axial direction by the magnetic force, so that the reflux opening and closing valve 50 is the exhaust reflux passage 23. Will block. Accordingly, all of the fluid discharged from the suction pump 20 is discharged to the outside through the exhaust port 17, so that the suction force is relatively increased, so that foreign substances can be easily sucked / removed.

4 is a view showing the main parts of the exhaust reflux vacuum cleaner according to another embodiment of the present invention. The same reference numerals are given to the same and equivalent parts as the above-described and illustrated embodiments, and detailed description thereof will be omitted. As shown, in the exhaust pipe 19 of the exhaust reflux vacuum cleaner of the present embodiment, the reflux path opening and closing valve 70 is rotatably provided to open and close the exhaust reflux path 23. The reflux path opening and closing valve 70 has a disc shape, and a pivot shaft 73 is formed along the radial direction so as to be received relative to the exhaust pipe 19 and rotate relative to the central region.

The rotation shaft 73 extends along the axial direction so that one end thereof can be exposed to the outside of the main body casing 13, and at the exposed side end, the return flow opening / closing valve 70 can be rotated between the blocking position and the open position. The operation handle 75 is coupled to be able to.

The stopper 77 is formed in the operation knob 75 so as to prevent the operation knob 75 from being accidentally rotated. The stopper 77 is protruded and retractably coupled along the axial direction of the rotational shaft 73, and a spring member 79 that applies an elastic force to protrude the stopper 77 is coupled to the rear of the stopper 77. .

Correspondingly, in the main body casing 13, a position accommodating the exposed end of the stopper 77 so as to interact with the stopper 77 to prevent the operation knob 75 from being accidentally rotated in the blocking position and the open position. Fixing grooves 24 are recessed, respectively.

By this configuration, when the cleaning function is to be strengthened, the operation knob 75 is rotated to the blocking position. When the operation knob 75 is rotated, the stopper 77 is retracted while contacting the edge of the position fixing groove 24, and when the operation knob 75 reaches the position fixing groove 24 formed at the blocking position, the spring member 79 Protruding by the elastic force of the ()) is accommodated in the position fixing groove 24 to prevent the operation knob (75) from being accidentally rotated. At the same time, the reflux path opening and closing valve 70 is disposed horizontally in the flow direction of the fluid to block the exhaust reflux path 23 so that the suction force acting on the first intake port 12a and the second intake port 12b is relatively increased. Be sure to

On the other hand, when the air cleaning function is to be enhanced, the operation knob 75 is rotated in the opposite direction to be fixed in the open position. Then, the reflux path opening and closing valve 70 rotates about the rotation shaft 73 to open the exhaust reflux path 23, and a part of the fluid discharged through the exhaust port 17 passes to the filter casing 40. By refluxing again, the dust collection efficiency can be improved to enhance the air cleaning function.

As described above, according to the present invention, by providing an exhaust reflux path opening and closing member that can open and close the exhaust reflux path to block or open the exhaust reflux path, one of the suction function and the air cleaning function can be selectively increased. Exhaust reflux vacuum cleaner is provided.

Claims (5)

A casing which forms an accommodation space therein and each of which has an intake port and an exhaust port; A suction pump accommodated in the casing and generating suction force; A filter member disposed on a suction side of the suction pump to suppress foreign substances from flowing into the suction pump; A filter casing connected to the suction side of the suction pump to collect the foreign matter blocked by the filter member so that the filter member is accommodated therein; A first suction path having one end connected to the suction port and the other end communicating with the filter casing; An exhaust reflux path having one end connected to the discharge side of the suction pump and the other end connected to the inflow side of the filter casing so that at least a part of the fluid discharged from the suction pump is introduced into the filter casing; And a reflux path opening and closing valve disposed in the exhaust reflux path to selectively open and close the exhaust reflux path. The method of claim 1, And a valve driving means for driving the reflux path opening / closing valve between a shutoff position for suppressing the inflow of fluid into the exhaust reflux path and an open position for allowing fluid to flow through the exhaust reflux path. Exhaust reflux vacuum cleaner. The method of claim 1, An ejector nozzle which is formed so that the velocity of the fluid may be injected into the exhaust reflux path, and an ejector chamber in which a downstream region of the ejector nozzle is in communication with the outside of the exhaust reflux path in a peripheral region of the ejector nozzle An exhaust reflux vacuum cleaner further comprising. The method of claim 3, And a second suction path having one end in communication with the outside of the casing and the other end in communication with the ejector chamber, the second suction path being configured to suck fluid from the outside. The method according to any one of claims 1 to 4, And an outlet side end portion of the exhaust reflux path merges with the first suction path before being introduced into the filter casing.