TWI696439B - Liguid suction device, wet cleaning device having the same, and method for sucking out liquid by the cleaning device - Google Patents

Abstract

The invention relates to a liquid suction device (1), which comprises a suction head (2) having a suction slit (4) defined by two lips (3), a dirty liquid tank (5), and an exhaust fan (6), wherein the suction slit (4), the dirty liquid tank (5) and the exhaust fan (6) are communicated with one another by means of an exhaust/suction channel (7), so that the liquid may be sucked into the dirty liquid tank (5) from a surface to be cleaned through the suction slit (4). In order to provide a liquid suction device (1) that does not leave any trace of liquid on the surface, the invention suggests that the liquid suction device (1) is provided with an air channel (8), which is connected with the pressure side of a fan, particularly with the pressure side of the exhaust fan (6) away from the exhaust/suction channel (7), and is also connected with the suction slit (4), so as to delivery the blowing/washing air generated by the fan, particularly the exhaust fan (6), into the suction slit (4). Furthermore, the invention also relates to a wet cleaning device (13) having the aforementioned liquid suction device (1), and a method for sucking out liquid on a surface to be cleaned by means of the aforementioned liquid suction device (1).

Description

Liquid suction device, wet cleaning device with the liquid suction device, and method for cleaning device to absorb liquid

The invention relates to a liquid absorbing device, especially for absorbing liquid on a hard floor surface and/or a window surface. The liquid absorbing device has: a suction head including a suction gap defined by two lips and a liquid A tank and a suction fan, wherein the suction slit, the dirty liquid tank and the suction fan are connected to each other by a suction channel, so that the suction slit can draw liquid into the dirty liquid tank from the surface to be cleaned.

In the prior art, liquid suction devices of the type described above are widely known. The liquid suction device is usually used in conjunction with the cleaning element inside the wet cleaning device. The wet cleaning device first applies liquid to the surface to be cleaned by the liquid application device, treats the surface with the cleaning element, and then, by the liquid absorption device Aspirate the remaining liquid on the face. For a description of such a wet cleaning device with a liquid suction device, see for example EP 1 611 830 A2. The liquid suction device described in this case has a suction head including two flexible lips, which are arranged before and after the suction slit along the normal movement direction of the wet cleaning device. The suction fan applies negative pressure to the dirty liquid tank, so that the liquid carrying dirt can be sent into the dirty liquid tank from the surface to be cleaned through the suction channel.

The disadvantage of this liquid suction device is that the suction head will leave liquid marks on the surface to be cleaned, especially on the gap end area of the suction slit, because the strength of the negative pressure applied to the gap end area is lower than that of the suction slit. It is closer to the center of the gap of the suction channel.

In view of this, the object of the present invention is to provide a liquid suction device that does not leave liquid traces such as drops or bands on the surface to be cleaned.

In order to achieve this object, the present invention proposes that the liquid suction device has an air duct, which is connected to the pressure side of the fan on one hand, in particular, connected to the pressure side of the suction fan away from the suction channel, and connected to the suction slit on the other hand So that the blowing air generated by the fan, especially the exhaust fan, can be sent into the suction slit.

The present invention supports the suction and removal of liquid by blowing blowing air into the suction slit. For this purpose, the fan used may be a suction fan of the liquid suction device for applying negative pressure to the suction head, or may be an additional fan. Using a fan, the liquid droplets attached to the lip of the suction slit are sent into the suction slit from the outside, so that these droplets will not drip from the suction head when the suction head is lifted off the surface to be cleaned, but will be It is sent into the suction channel and then into the dirt tank. This prevents or at least reduces the retention of droplets and/or liquid bands on the surface to be cleaned. In principle, the blowing air can be blown into the suction slot in different directions at different positions, and is particularly suitable for applying the blowing air to one or both sides of the gap end area of the suction slot.

The present invention further proposes that the air duct has two sub air ducts connected in parallel along the flow direction, and these sub air ducts are respectively connected to the gap end regions of the suction slits, so as to remove the blown air generated by the fan, especially the exhaust fan The slit end region is applied to the suction slit in the direction of the center of the slit provided in the slit end regions. In this way, the two slit end regions of the suction slit (that is, the lateral free end regions of the suction slit) are applied with purge air from the outside to the inside in the same manner, so that, in particular, the droplets adhering to the slit end region face The direction of the center of the gap of the suction slit is conveyed, and when the suction head is lifted away from the surface to be cleaned, no liquid trace will be formed due to dripping at the end of the gap. In addition, the suction slit is symmetrically applied with purge air from the direction of the two slit end regions due to the separation of the air channels, thereby preventing liquid dripping over the entire length of the suction slit.

The invention further proposes that these sub-air ducts-with reference to the connection from the center of the slit to the end regions of the slits-are connected to the outwardly facing end surfaces of the slit end regions. According to this technical solution, the blowing air of the fan is blown into the suction slit through the lateral end surface of the slit end region, that is, along the direction corresponding to the longitudinal extension of the suction slit. Thereby, the flow direction of the blowing air is substantially perpendicular to the suction air that applies negative pressure to the surface to be cleaned and sucks the liquid into the suction channel. By this, the liquid deviates from the lateral end region of the suction slit and enters the suction head.

The invention further proposes that the suction channel is connected to the suction slit in the area of the central part of the slit. In this way, the suction side end region of the suction channel is beneficially located in the region of the suction head, and the liquid is sent into this region after leaving the suction slit end region. With this, the liquid transported by the blowing air can be sucked into the suction channel with the best effect and enter the dirt tank.

The invention further proposes that the suction head and the suction channel are connected to each other by a rotary joint and can be relatively deflected. Since the suction head can be deflected relative to the suction channel, even when the suction device (and suction channel) is inclined to different degrees relative to the surface to be cleaned, the suction head can contact the surface to be cleaned, and the suction seam The inlet is advantageously at a constant angle to the surface to be cleaned. When the user increases the angle between the suction device and the surface to be cleaned, the suction head deflects with respect to the suction channel, so that the suction slit continues to maintain the previous angle with respect to the surface, so that it can still Liquid is drawn into the sump tank with the best effect. Among them, the rotary joint beneficially corresponds to a spring whose restoring force always presses the suction head toward the surface to be cleaned, thereby ensuring the best suction effect of the liquid suction device. The swivel joint may advantageously have a swivel shaft, which is constructed as a hollow cylinder which is connected to the end region of the suction channel in a non-rotatable manner. On the end surface of the hollow cylinder, channel extensions that can rotate relative to the hollow cylinder can be advantageously provided, and these channel extensions are connected to the suction head in a non-rotatable manner. With this, the liquid sucked through the suction slit can be sent through the suction head and the channel extension Into the rotating shaft of the rotary joint, and finally into the suction channel and sewage tank.

In addition to the liquid suction device of the present invention, a wet cleaning device especially for wet cleaning hard floor surfaces and/or window surfaces is provided, which has: a cleaning element corresponding to the cleaning element for applying liquid to Cleaning element and/or liquid application device on the surface to be cleaned, liquid absorption device for absorbing liquid on the surface to be cleaned, wherein the liquid absorption device has: a suction device including a suction gap defined by two lips The head and the suction slit are fluidly connected to the dirty liquid tank and the exhaust fan through the suction channel, so that the liquid can be sucked into the dirty liquid tank from the surface to be cleaned through the suction slit, and the wet cleaning device further has an air channel , Which is connected to the pressure side of the fan on one hand, especially the pressure side of the suction fan away from the suction channel, and on the other hand to the suction slit, so that the blowing air generated by the fan, especially the blower, can be sent into The suction slit.

The wet cleaning device of the present invention may be, for example, a hard surface cleaning device or a window cleaning device. A cleaning roller, cleaning cloth or the like can be provided as a cleaning element. The cleaning element and/or the surface to be cleaned is supplied with liquid by the liquid application device to carry out the cleaning process. During and/or after cleaning, the liquid on the surface is sent to the dirty liquid tank by a fan (in particular, an exhaust fan) of the wet cleaning device. For this purpose, this wet cleaning device has a suction head which is advantageously arranged behind the cleaning element along the direction of movement of the wet cleaning device. The suction head advantageously has several flexible lips, at least one of which passes tightly across the face, and in the process collects liquid in the area of the suction slit. Then, by the negative pressure generated by the exhaust fan, the liquid is sucked into the dirty liquid tank through the suction channel. In addition, the blowing air of the exhaust fan is applied to the suction slit, so that the liquid is further blown into the suction slit from the outside. Thereby, support is provided to draw liquid into the suction head, so that when the suction head is lifted off the surface, no droplets or liquid bands are left on the surface.

The invention proposes that the liquid application device and the cleaning element are jointly constructed to have The face of the tank abuts the element. For example, the one-sided abutment element itself can be constructed as a liquid tank, and the cleaning element (preferably a cleaning cloth) is tensioned on the liquid tank, wherein an opening and a nozzle are provided between the liquid tank and the cleaning element Or similar, so that a certain amount of liquid can be continuously released onto the cleaning element. This type of liquid application device does not need to be provided with a liquid pipe leading from a separate liquid tank to the liquid application device or the cleaning element, so this embodiment is particularly easy to manufacture and can reliably wet the cleaning element.

Advantageously, the suction head and the suction channel, and/or the suction head and the cleaning element, and/or the cleaning element and the suction channel are connected to each other by a rotary joint, and can be relatively deflected. In this way, the suction head and/or the cleaning element have the maximum degree of mobility, so that the wet cleaning device can clean the surface and absorb the liquid on the surface when the angle of the wet cleaning device is different from the surface to be cleaned. When the user tilts the wet cleaning device relative to the surface to be cleaned, the suction head and/or cleaning element is deflected relative to the suction channel under the contact pressure acting in the direction of the surface to be cleaned. Among them, the suction slit of the suction head can beneficially maintain a constant angle, so that no matter what operating angle the wet cleaning device is, the best liquid suction effect can be obtained. The same applies to the cleaning element, as long as it is not a rotationally symmetrical cleaning element, such as a cleaning drum, it advantageously always has the same orientation with respect to the surface to be cleaned. In order to ensure the necessary contact pressure to bring the cleaning element or suction head into contact with the surface to be cleaned, the cleaning element or suction head is advantageously exerted by a spring. The spring may be a spiral spring, which is arranged between the suction head/cleaning element and the suction channel. The suction channel advantageously has a rotating shaft configured as a hollow cylinder on which the suction head and/or the cleaning element can be rotated without affecting each other. Among them, the hollow cylindrical rotating shaft advantageously has channel extensions provided at the ends, and these channel extensions provide a flow path that can be connected to the suction head and thus also to the suction slit. In this way, the air blown into and/or sucked into the suction slit can flow into the hollow through the channel extensions A cylindrical rotating shaft and a suction channel connected non-rotatably to the rotating shaft. In addition, the suction head and the cleaning element can move without affecting each other, thereby also making it possible to compensate for unevenness or height deviation of the surface as appropriate, otherwise it will cause the cleaning element or the suction head to separate from the surface.

The invention proposes that the air duct has two sub-air ducts connected in parallel along the flow direction, and these sub-air ducts are respectively connected to the gap end areas of the suction slits, so as to remove the blown air generated by the fan, especially the exhaust fan, from the gaps The end area is applied to the suction slit in the direction of the center of the slit provided at the end portion of the slit. That is to say, the air duct is divided into two sub air ducts from the pressure side of the fan, wherein each sub air duct is applied with purge air for one of the slit end areas of the suction slit. The purge air flow discharged on the pressure side of the exhaust fan is beneficially collected in the funnel-shaped section of the air duct, and is guided from the outside between the two lips of the suction slit through the two sub air ducts. Through this lateral purge air flow, the sucked liquid flows symmetrically from both sides to the lips, and enters the central part of the suction slit.

Advantageously, these sub-air ducts-with reference to the connection from the center of the slit to the end regions of the slits-are connected to the outwardly facing end surfaces of the slit end regions. Thereby, the blowing air is applied to the suction slit from outside to inside (ie, toward the center of the slit) along the longitudinal extension of the suction slit. In this way, the droplets on the end area of the slit are blown toward the center of the slit, so that the droplets can reach the suction channel smoothly, and will not drip when the suction head is lifted off the surface to be cleaned.

The invention further proposes that the suction channel is connected to the suction slit in the area of the central part of the slit. In this way, the droplets located on the gap end area of the suction slit are transported in the direction of the suction channel to which negative pressure is applied, so that these droplets can be drawn into the dirty liquid tank particularly easily. This point provides support for transferring liquid from the outside to the inside on the suction seam.

Finally, the present invention also relates to a method for absorbing liquid on a surface to be cleaned by a liquid suction device. The surface to be cleaned is particularly a hard floor surface and/or a window surface. The liquid suction device includes: a suction head including a suction slit defined by two lips, a dirt liquid tank and an exhaust fan, wherein the liquid is sucked into the dirt liquid tank through the suction slit by the exhaust fan, and is characterized in that: During liquid removal, the blow air of the fan, especially the blow air of the exhaust fan, is applied to the suction slit, in particular, to one or both of the slit end regions of the suction slit, so as to feed the liquid into the suction head.

The present invention will be described in detail below in conjunction with examples.

1‧‧‧Liquid suction device

2‧‧‧Sucker

3‧‧‧ Lips

4‧‧‧Sucking

5‧‧‧sewage tank

6‧‧‧Exhaust fan

7‧‧‧Suction channel

8‧‧‧Wind

9‧‧‧ Zifeng Road

10‧‧‧Gap end area

11‧‧‧Gap center

12‧‧‧Rotary joint

13‧‧‧Wet cleaning device

14‧‧‧Cleaning components

15‧‧‧Liquid application device

16‧‧‧switch

17‧‧‧handle

18‧‧‧Spring

19‧‧‧spindle

20‧‧‧channel extension

1 is a perspective perspective view of the wet cleaning device of the present invention; FIG. 2 is a side view of the wet cleaning device shown in FIG. 1. FIG.

The figure shows a wet cleaning device 13, here constructed as a hand-held window cleaning device, with a liquid suction device 1, together with a cleaning element 14 and a liquid application device 15. The cleaning element 14 and the liquid application device 15 are jointly constructed as a surface abutment element with a liquid tank. The liquid tank has a cleaning element 14 on its side facing the surface to be cleaned, this cleaning element 14 being constructed here as a cleaning cloth. The liquid applicator 15 and the cleaning element 14 are connected to each other through the opening in the wall of the liquid applicator 15 so that the liquid is continuously released from the liquid tank of the liquid applicator 15 to the cleaning element 14 and then released to be cleaned On the surface, for the cleaning process.

The liquid suction device 1 of the wet cleaning device 13 has a suction head 2 constructed here as a flat double-walled element, between which the liquid can be guided. The suction head 2 has two lips 3 on its side facing the surface to be cleaned. These lips 3 form a straight suction slit 4 whose longitudinal extension is perpendicular to the normal movement direction of the wet cleaning device 13. The suction head 2 is connected to the suction channel 7 through the rotary joint 12, through which the liquid can pass The suction slit 4 flows to the exhaust fan 6. Between the suction fan 6 and the suction channel 7 is provided a dirty liquid tank 5 which contains the liquid sucked from the surface to be cleaned. The rotary joint 12 provided between the suction channel 7 and the suction head 2 has a rotary shaft 19 which is constructed as a hollow cylinder extending parallel to the longitudinal direction of the suction slit 4. Wherein, the suction head 2 is rotatably arranged on the rotary shaft 19 of the rotary joint 12 through the channel extension 20 installed at the end on the rotary shaft 19, and the corresponding spring 18 presses the suction head 2 toward The surface to be cleaned, so that no matter what angular position exists between the wet cleaning device 13 and the surface to be cleaned, it can ensure that the surface is in contact with the suction slit 4 of the suction head 2. No matter what angular position exists between the suction head 2 and the surface to be cleaned, the channel extension 20 can fluidly connect the suction head 2 to the rotating shaft 19 and the suction channel 7.

An air duct 8 is provided on the pressure side of the exhaust fan 6, and the blowing air leaving the exhaust fan 6 is sent to the suction slit 4 of the suction head 2 through the air duct 8. The air duct 8 is divided into two parallel sub-air ducts 9, wherein each sub-air duct 9 applies purge air to the slit end region 10 of the suction slit 4 so that the purge air starts from the two slit end regions 10 It is conveyed symmetrically toward the center 11 of the gap of the suction slit 4. During this period, the droplets attached to the gap end region 10 are washed away and sent into the suction head 2, and this part of the droplets finally passes through the channel extension 20, the rotating shaft 19 and the suction channel 7 at the tip Enter the sewage tank 5. In this way, the liquid present on the gap end region 10 is always blown into the suction head 2 so that no liquid accumulation will form in this region.

In addition, the housing of the wet cleaning device 13 has in a conventional manner: a switch 16 for starting or closing the wet cleaning device 13 and a user who can hold the wet cleaning device 13 to manipulate the wet during the cleaning process Handle of the type cleaning device 13. The dirty liquid tank 5 is detachably provided in the wet cleaning device 13 so that the liquid contained in the dirty liquid tank 5 can be removed. As an alternative, it can also be provided as follows: the dirty liquid tank 5 has an opening through which liquid can be poured out. Similarly, the liquid application device 15 can also have Note the opening for pouring liquid.

The working principle of the present invention is as follows: the user fills the liquid tank of the liquid application device 15 with liquid. Then, the user activates the exhaust fan 6 through the switch 16. During the subsequent cleaning process, the user controls the wet cleaning device 13 to move on the surface to be cleaned, during which the liquid is released from the liquid tank of the liquid application device 15 onto the cleaning element 14. The liquid reaches the surface to be cleaned via the cleaning element 14 (here a cleaning cloth), and removes dirt on the surface to be cleaned based on the moving movement of the wet cleaning device 13. The user pulls the wet cleaning device 13 toward himself to realize the return stroke of the wet cleaning device 13, whereby the suction slit 4 comes into contact with the liquid on the surface to be cleaned, thereby being able to pass through the suction slit 4 The negative pressure above draws the liquid into the suction head 2. Next, the liquid passes through the channel extension 20, the rotating shaft 19, and the suction channel 7 from the suction head 2, and enters the dirty liquid tank 5. At the same time, the blowing air flows from the pressure side of the exhaust fan 6 to the suction slit 4 through the sub-air channel 9. In particular, the blowing air is applied to the slit end region 10 of the suction slit 4 so that the liquid located in the suction slit 4 is transported from the outside to the inside, that is, from the slit end region 10 to the slit central portion 11. The negative pressure of the suction fan 6 causes the liquid to turn in the direction of the channel extension 20, which means that it also turns in the direction of the suction channel 7 at the same time. This generally results in the gap end region 10 remaining free of liquid, so that no liquid will drip when the suction head 2 is lifted away from the surface to be cleaned.

Through the rotary joint 12 provided between the suction channel 7 and the suction head 2, the angular position between the suction head 2 and the suction channel 7 can be changed. In this way, no matter what angular position exists between the wet cleaning device 13 and the surface to be cleaned, the suction head 2 and the suction slit 4 can form a constant angle with the surface, thereby obtaining a constant suction effect. In addition to the suction head 2, the liquid application device 15 can also be rotatably provided on the rotating shaft 19. Therefore, regardless of the angular position of the wet cleaning device 13, the liquid application device 15 can also be placed against the surface to be cleaned. If you want to clean If the surface has unevenness or height deviation, both the liquid application device 15 and the suction head 2 can rotate around the rotation axis 19 without affecting each other, so as to stand on the surface with the best effect.

After the cleaning process is completed, the user turns off the wet cleaning device 13 through the switch 16. Then, the user can remove the liquid sucked from the surface of the dirty liquid tank 5 and discard the remaining liquid in the liquid applying device 15 as appropriate.

Although in the illustrated embodiment, the blow air is applied to the suction slit 4 by the exhaust fan 6, an additional fan may be used for this.

1‧‧‧Liquid suction device

2‧‧‧Sucker

3‧‧‧ Lips

4‧‧‧Sucking

5‧‧‧sewage tank

6‧‧‧Exhaust fan

7‧‧‧Suction channel

8‧‧‧Wind

9‧‧‧ Zifeng Road

10‧‧‧Gap end area

11‧‧‧Gap center

12‧‧‧Rotary joint

13‧‧‧Wet cleaning device

14‧‧‧Cleaning components

15‧‧‧Liquid application device

16‧‧‧switch

17‧‧‧handle

18‧‧‧Spring

19‧‧‧spindle

20‧‧‧channel extension

Claims (11)

A liquid absorbing device, especially for absorbing liquid on a hard floor surface and/or a window surface, the liquid absorbing device (1) has: including a suction slit (4) defined by two lips (3) A suction head (2), a sewage tank (5) and an exhaust fan (6), wherein the suction slit (4), the sewage tank (5) and the exhaust fan (6) are The suction channels (7) are connected to each other, so that through the suction slit (4) liquid can be sucked into the dirty liquid tank (5) from the surface to be cleaned, characterized in that the liquid suction device (1) has a The air duct (8) is connected on the one hand to the pressure side of the fan, in particular, to the pressure side of the suction fan (6) away from the suction channel (7), and on the other hand to the suction slit (4), Therefore, the blowing air generated by the fan, especially the exhaust fan (6) can be sent into the suction slit (4). The liquid suction device according to claim 1, wherein the air duct (8) has two sub air ducts (9) connected in parallel along the flow direction, and these sub air ducts (9) are respectively connected to one of the suction slits (4) Slit end region (10), so that the blowing air generated by the fan, especially the exhaust fan (6), is directed from the slit end region (10) to one of the slit end regions (10) The suction slit (4) is applied in the direction of the center of the slit (11). The liquid suction device according to claim 2, wherein, with reference to the connection from the center part (11) of the gap to the end regions (10) of the gaps, the sub air ducts (9) are connected to the end regions of the gaps (10) The end face facing outward. The liquid suction device according to claim 1 or 2, wherein the suction channel (7) is connected to the suction slit (4) in the area of the central portion (11) of the slit. The liquid suction device according to claim 1 or 2, wherein the suction head (2) and the suction channel (7) are connected to each other by a rotary joint (12) and can be relatively deflected. A wet cleaning device, especially used to wet hard floor surface and/or window surface Type cleaning, having: a cleaning element (14), a liquid application device (15) corresponding to the cleaning element (14) for applying liquid to the cleaning element (14) and/or the surface to be cleaned, for A liquid suction device (1) for absorbing liquid on the surface to be cleaned, and the cleaning element (14) is particularly for cleaning rollers and/or cleaning cloths, wherein the liquid suction device (1) has: A suction head (2) of a suction slit (4) defined by a lip (3), the suction slit (4) is fluidly connected to a dirt tank (5) and a fluid tank through a suction channel (7) Exhaust fan (6), so that through the suction slit (4), liquid can be sucked into the dirty liquid tank (5) from the surface to be cleaned, characterized in that an air duct (8) is provided, which is connected to the fan on the one hand The pressure side, in particular, connects the pressure side of the suction fan (6) away from the suction channel (7), and on the other hand connects the suction slit (4), so that the fan, especially the suction fan ( 6) The generated purge air is sent into the suction slit (4). The wet cleaning device according to claim 6, wherein the suction head (2) and the suction channel (7), and/or the suction head (2) and the cleaning element (14), and/or the cleaning element (14) and the suction channel (7) are connected to each other by a rotary joint (12) and can be relatively deflected. The wet cleaning device according to claim 6 or 7, wherein the air duct (8) has two sub air ducts (9) connected in parallel along the flow direction, and these sub air ducts (9) are respectively connected to the suction slit (4) ) One of the slit end regions (10), so that the blowing air generated by the fan, especially the exhaust fan (6), is directed from the slit end regions (10) toward the slit end regions (10) The central part (11) of one of the gaps is applied to the suction slit (4). The wet cleaning device according to claim 8, wherein the sub air ducts (9) are connected to the slit ends with reference to the connection from the slit central portion (11) to the slit end regions (10) The outward facing end of the zone (10). The wet cleaning device according to claim 8, wherein the suction channel (7) is attached to the slit The area of the central part (11) of the gap is connected to the suction slit (4). A method for absorbing liquid on a surface to be cleaned by a liquid absorbing device, the surface to be cleaned in particular is a hard floor surface and/or a window surface, the liquid absorbing device (1) has: including two lips ( 3) A suction head (2), a dirty liquid tank (5) and a suction fan (6) of a suction slit (4) defined, wherein liquid is passed through the suction slit by the suction fan (6) (4) The suction liquid tank (5) is characterized in that during the liquid suction, the blow air of the fan, especially the blow air of the exhaust fan (6) is applied to the suction slit (4) In particular, it is applied to one or both slit end regions (10) of the suction slit (4) in order to feed liquid into the suction head (2).

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