RU2676605C2 - Linen care device with deflecting element - Google Patents

Abstract

FIELD: personal and household goods.SUBSTANCE: present invention relates to a laundry care device with a pumping system, which comprises a tank for receiving a washing solution thereto, the tank for the washing solution comprising an inlet and an outlet; pipeline connecting the inlet to the outlet, and a pump for pumping the washing solution from the outlet through the pipeline to the inlet. Pumping system contains a deflecting element with a deflecting section for redirecting the flow of the washing solution pumped out of the inlet to the tank for the washing solution.EFFECT: device for clothes care is offered.13 cl, 3 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a laundry care appliance with a deflecting element.

State of the art

In order to be able to carry out the laundry care process efficiently, conventional laundry care appliances include a pumping system that allows the detergent solution to be drained from the detergent solution tank and re-connected to the detergent solution tank. The pumping system includes an outlet in the tank for the washing solution, through which the washing solution can flow out and then pumped through the pipeline by means of a pump. The pumped-out washing solution is passed through a pipeline to the sprayer, which allows the washing solution to be fed back into the washing solution tank.

DE 3704079 A1 describes a washing machine with a bypass pipe through which the washing solution can flow back into the sump of the washing machine.

In the laid out (not accepted) application EP 2348152 A1 shows a washing machine with a bypass device.

US 2005/0034488 A1 shows a washing machine in the laid-out (non-accepted) application.

In the laid out (not accepted) application EP 2471992 A1 shows a washing machine.

In the laid out (not accepted) application US 2010/064444 A1 shows a washing machine.

In the laid out (non-accepted) application EP 1505191 A1 shows a washing machine.

In the laid out (non-accepted) application EP 1679401 A2 shows a washing machine.

Disclosure of the invention

The task underlying the invention is to indicate a laundry care device with a pumping system that does not become clogged due to deposits of contaminants.

This problem is solved by objects with features according to the independent claim. Preferred embodiments of the invention are the subject of description, figures and dependent clauses.

According to one aspect of the invention, the problem is solved by a laundry care device with a pumping system, which comprises a tank for receiving washing solution therein, the washing solution tank comprising an inlet and an outlet, a pipe connecting the inlet and the outlet, and a pump for pumping the cleaning solution from the outlet through the pipeline into the inlet, the pumping system comprising a deflecting element with a deflecting portion for redirecting the flow of mine cleaning solution pumped from the inlet into the tank for cleaning solution.

Due to this, a technical advantage is achieved, namely, that it is possible to efficiently redirect the flow of the washing solution pumped out of the inlet through the deflecting element without narrowing the cross section of the inlet and injecting it into the tank for the washing solution, so that the inlet does not become clogged with impurities in a washing solution.

The washing solution is pumped in the direction of flow through the pipeline and is discharged through the inlet of the washing solution tank. An exiting cleaning solution in the form of a jet of cleaning solution is sprayed onto the deflecting portion of the deflecting element. When a jet of washing solution enters the deflecting section, the deflecting section turns the jet of washing solution into the washing solution tank. It is possible to redirect the jet of washing solution with a deflecting section at a certain deflection angle, which allows you to inject a jet of washing solution into the tank for washing solution in a certain direction of flow, which is changed by the deflecting section.

In the process of washing the laundry, for example, the nap is separated from the laundry and they enter the washing solution. Contaminants drain along with the cleaning solution from the washing solution tank through the outlet, are pumped by the pump through the pipeline, and again fed to the washing solution tank through the inlet. In order to ensure reliable operation of the pumping system during the entire service life of the laundry care appliance, it is necessary to make special demands on the geometric characteristics of the inlet. As a result of pumping the laundry, it is possible to deposit contaminants at certain places in the pumping system of the laundry care appliance and, as a result, clogging certain areas of the pumping system.

The deflecting portion may be placed at a certain distance from the inlet to avoid clogging the gap between the inlet and the deflecting portion with contaminants. Thus, it is possible to operate a laundry care appliance with a pumping system that efficiently delivers the washing solution to the washing solution tank and which does not become clogged due to deposits of contaminants.

When the jet of washing solution enters the deflecting section, significant tangential forces occur in the washing solution, as a result of which the jet of washing solution is divided into many drops of washing solution. By forming the deflecting section, it is possible to set the desired geometric characteristics of the jet of washing solution, for example, in the form of a fan-shaped jet. The resulting droplets of the cleaning solution form a mixture of cleaning solution and air, fog from the cleaning solution, which is injected into the tank for cleaning solution. Due to the spreading of the drops of the washing solution, it is possible to moisten the washing solution with a large area of the tank for the washing solution, which as a result allows the washing solution to be supplied to the laundry, distributing the latter in a preferred manner. As a result, it becomes possible to effectively wet the laundry.

Under the device for care of linen refers to the device used for the care of linen. In particular, such a laundry care appliance is understood to mean a household laundry care appliance. That is, such a device for the care of linen, which is used in the process of housekeeping and which processes linen in quantities that are common for domestic use.

The fact that the pipeline connects the inlet to the outlet means, in particular, that the pipeline starts at the outlet and ends at the inlet. This means, for example, that in an embodiment, the first end of the conduit is formed by an inlet. This means, for example, that in an embodiment, the second end of the conduit is formed by an outlet. That is, the pipeline does not protrude into the tank for the cleaning solution. Thus, the cleaning solution from the pipeline flows directly through the inlet into the tank for the cleaning solution. After the detergent solution passes through the inlet, it is in the free tank for the detergent solution.

In an embodiment, the detergent solution tank does not have a piping section protruding into the detergent solution tank.

Due to the fact that the pipe ends at the inlet, that is, there is no portion of the pipe protruding into the tank for the washing solution in the washing solution tank, a technical advantage is achieved, consisting in particular in that it is possible to effectively seal the pipe in the inlet. This is an advantage especially compared to the case in which the inlet pipe extends into the washing solution tank.

In an embodiment, an inlet is formed in the wall of the washing solution tank, wherein the inlet is made in the form of an opening on the inside of the wall of the washing solution tank to the outside of the wall of the washing solution tank. The conduit preferably terminates at an opening on the outside.

In an embodiment, the cross section of the inlet corresponds to the cross section of the pipeline.

In an embodiment, the cross section of the inlet corresponds to the cross section of the pipeline in the pipeline immediately before the inlet, with respect to the direction of flow of the washing solution. This means that the section of the pipeline, which is located directly in front of the inlet with respect to the direction of flow of the washing solution, is not narrowed, that is, it does not have a narrowing.

The cleaning solution pumped out of the inlet is the cleaning solution that exits the pipeline through the inlet and is inside the tank for cleaning solution. Then this pumped-out washing solution is rotated by means of a deflection section.

In an embodiment, the deflecting portion is located at a distance from the inlet.

In an embodiment, the deflecting element is located in or mounted on the washing solution tank. This means that the deflecting element in the embodiment is located on or fixed to the inner wall of the washing solution tank. Due to this, a technical advantage is achieved, consisting, for example, in that it is possible to mount the deflecting element independently of the inlet.

In an embodiment, the pumped washing solution forms a stream of water, in particular a conical stream, that is, a circular stream of water. In a conical stream, the water stream has, in particular, a certain advantageous direction, or a main direction.

In a preferred embodiment of the laundry care appliance, the deflecting portion is located at a distance from the inlet, the distance being greater than the diameter of the pipe.

Due to this, a technical advantage is achieved, consisting in the fact that by selecting the distance between the deflecting section and the inlet, clogging of the gap between the deflecting section and the inlet is prevented.

During the pumping process, the contaminants are pumped by the pumping system. The size of the contaminants is limited by the diameter of the pipeline, since contaminants that are larger than the diameter of the pipeline cannot be pumped through the pipeline. In order to avoid clogging of the inlet, the inlet does not constrict, and the deflecting portion of the deflecting element is placed at a distance from the inlet that is larger than the diameter of the pipe. This helps to prevent clogging of the gap between the inlet and the deflecting section with those contaminants that are large enough to pass through the pipeline. As a result, it is possible to operate the laundry care appliance with a pumping system that does not become clogged due to deposits of contaminants.

In a further preferred embodiment of the laundry care appliance, the deflecting portion comprises a pad that makes it possible to spray it with the pumped-out washing solution in order to inject the washing solution into the washing solution tank.

Due to this, a technical advantage is achieved, consisting in the fact that the platform of the deflecting section allows to achieve effective injection of the washing solution into the tank for washing solution. When the jet of washing solution hits the pad of the deflecting section, the jet of washing solution deviates from the pad at a certain angle of deviation. As a result, a jet of cleaning solution is injected into the tank for cleaning solution with a flow direction that is changed by the deflecting portion. When a jet of detergent solution enters the site, a lot of drops of detergent solution are formed, which are injected into the tank for the detergent solution in the direction of flow changed by the deflecting portion. Changing the position of the platform of the deflecting section allows you to influence the geometric characteristics of the jet of washing solution, as a result of which, for example, a fan stream is formed from the outgoing conical stream, which makes it possible to moisten the laundry in the washing drum on a plane. As a result, an effective supply of the washing solution to the washing solution tank without clogging the inlet is ensured.

In a further preferred embodiment of the laundry care appliance, the deflecting area pad is at an angle of 25 ° to 65 ° to the direction of the jet of the sprayed washing solution pumped out of the inlet.

Due to this, a technical advantage is achieved, consisting in the fact that it allows to achieve effective injection of the cleaning solution into the tank for cleaning solution. If the jet of washing solution is directed to the site of the deflecting section, then the jet of washing solution deviates from the site at a certain angle of deviation. Effective deflection of the jet of washing solution is possible only if the platform of the deflecting section is at an angle to the direction of flow of the washing solution pumped out of the inlet. Particularly preferable to achieve an effective deviation of the direction of the jet of the washing solution when it is injected into the tank for the washing solution has been shown to be the angle of inclination of the pad from 25 ° to 65 ° to the direction of flow of the washing solution pumped out of the inlet for the washing solution. In a preferred embodiment, the angle of the pad relative to the direction of flow of the washing solution pumped out of the inlet is about 45 °.

In a further preferred embodiment of the laundry care appliance, the deflecting element is in the form of a curved metal plate, a rubber plate or a plate of synthetic material.

Due to this, a technical advantage is achieved in that the use of a curved metal plate, a curved rubber plate or a curved plastic plate leads to a preferred pattern of deflection of the jet of washing solution. The implementation of the deflecting element in the form of a plate provides a sufficiently large surface on which it is possible to redirect the jet of washing solution pumped from the inlet. In particular, it is possible to prevent the passage of part of the washing solution past the deflecting portion of the deflecting element. It is possible, in particular, to incorporate elements of metal, rubber or synthetic material into the pumping system of the laundry care appliance, since in this case the materials used are not damaged by the washing solution during operation of the laundry care appliance. This ensures effective injection of the cleaning solution into the washing solution tank during operation of the laundry care appliance.

In a further preferred embodiment of the laundry care appliance, the surface of the deflecting portion comprises a recess, a groove or a rib.

Due to this, a technical advantage is achieved, consisting in the fact that due to the use of the recess, groove or ribs on the surface of the deflecting section, an effective deflection of the washing solution is achieved with which the deflecting section is sprayed. Due to the presence of a recess, a groove or rib, the surface of the deflecting section is not flat, but has an unevenness, which, when the washing solution is deflected, leads to an irregular nature of the injection of the washing solution into the washing solution tank. This allows you to achieve the preferred nature of the spray jet of washing solution supplied to the surface of the deflecting section. In this case, a lot of drops of the washing solution arise, which are effectively injected into the tank for the washing solution in the direction of flow movement changed by the deflecting section.

In a further preferred embodiment of the laundry care appliance, the deflecting member comprises a support region that connects the conduit to the deflecting portion.

Due to this, a technical advantage is achieved in that the supporting region of the deflecting element allows to stably strengthen the deflecting section in the pipeline so as to be able to place the deflecting section at a preferred distance from the inlet. It is possible to carry out the support region in such a way that it does not block the spray path of the washing solution pumped out of the pipeline, but is fastened with one end on the outer region of the pipeline and the other end on the deflecting section. As a result, a stable fastening of the deflecting element on the pipeline is achieved without blocking the supporting region of the jet of washing solution pumped out of the pipeline, or without creating an obstacle to it. As a result of this, an effective hit of the jet of washing solution on the deflecting section is ensured.

In a further preferred embodiment of the laundry care appliance, the support region is in the form of a rod, a jumper or a plate.

Due to this, a technical advantage is achieved, consisting in the fact that when the support region is made in the form of a rod, jumper or plate, it is possible to stabilize the deflecting section on the pipeline without blocking the reference region of the washing solution pumped out of the pipeline or without creating an obstacle for it.

In a further preferred embodiment of the laundry care appliance, an inlet is located on the front or top side of the washing solution tank, and an outlet is located on the lower side of the washing solution tank.

Thanks to this, a technical advantage is achieved consisting in the possibility of efficiently supplying the washing solution to the washing solution tank due to the corresponding placement of the outlet and the inlet. An outlet is located on the underside of the detergent solution tank and, as a result, is positioned in a preferred manner, allowing the detergent solution to be drained from the detergent solution tank. The inlet is located on the upper or front side of the laundry care appliance, for example, in the vicinity of the sealing collar. As a result, the washing solution can be supplied from the pipeline to the washing solution tank from the top or side through the inlet, which allows efficient pumping of the washing solution in the pumping system.

In a further preferred embodiment of the laundry care appliance, the deflecting element is located on the front or top side of the washing solution tank.

Due to this, a technical advantage is achieved consisting in the possibility of efficiently injecting the washing solution into the washing solution tank due to the corresponding placement of the deflecting element on the front or upper side of the washing solution tank. When the jet of washing solution is pumped out of the pipeline and encounters a deflecting portion of the deflecting element in the interior of the tank for the washing solution, the jet of washing solution rotates, and this leads to spraying of the washing solution. Due to the location of the deflecting element in the interior of the washing solution tank, the sprayed washing solution enters completely into the washing solution tank and the possibility of the washing solution leaving the washing solution tank when sprayed is prevented.

In a further preferred embodiment of the laundry care appliance, the pumping system comprises a fill level sensor, the fill level sensor being configured to detect the level of the washing solution in the washing solution tank, the pump being configured to control the capacity depending on the recorded fill level.

Due to this, a technical advantage is achieved consisting in the ability to control the amount of washing solution injected into the washing solution tank by adjusting the pump performance depending on the detected level of washing solution in the washing solution tank. If the level of filling of the detergent solution tank with the detergent solution is high, it is possible to increase the pump capacity to drain more detergent from the detergent solution tank through the outlet, pump it through the pipeline and inject it into the detergent solution tank with a deflecting element. With a low fill level in the washing solution tank, pump performance may be reduced to prevent the washing solution tank from running dry. As a result, effective control of the pumping system is achieved depending on the detected level of the washing solution in the washing solution tank.

In a further preferred embodiment of the laundry care appliance, a flow sensor is arranged in the pipeline, the flow sensor being configured to detect the flow rate of the washing solution in the pipeline in a certain time interval, the pump being configured to control its performance depending on the flow rate recorded during time interval.

Due to this, a technical advantage is achieved consisting in the ability to control the amount of detergent injected into the tank for the detergent solution, and to control the nature of the injection of the detergent solution by taking into account the recorded flow rate. Since at a high flow rate in the pipeline a large amount of washing solution is transported over a time interval, accordingly, a large amount of washing solution is injected into the washing solution tank through a deflecting element, compared with its quantity at a low flow rate. The flow rate of the washing solution in the pipeline also affects the nature of the injection of the washing solution, since at a high flow rate in the pipeline the jet of washing solution encounters the deflecting section at a high speed and as a result, more intensive spraying of the washing solution is manifested. As a result of this, the washing solution is highly atomized, which makes it possible to efficiently inject the washing solution into the washing solution tank. As a result, effective wetting of the laundry in the washing drum is achieved.

In a further preferred embodiment of the laundry care appliance, the pump is configured to change the frequency of its operation, or the pressure generated by the pump, or the pump, in order to control the pump performance.

Due to this, a technical advantage is achieved consisting in the ability to control the flow rate of the washing solution in the pipeline by changing the frequency of the pump, or created by the pump pressure, or pumping, and thereby controlling the amount of washing solution supplied to the tank for washing solution. If it is required to inject a small amount of washing solution through the deflecting element into the tank for the washing solution, then it is possible to reduce the pump performance. If you want to inject a large amount of washing solution through the deflecting element into the tank for the washing solution, then it is possible to increase the productivity of the pump. As a result of this, the amount of the washing solution that is really necessary for the laundry care process is supplied to the washing solution tank, and the nature of the injection of the washing solution into the washing solution tank is possible.

In a further preferred embodiment of the laundry care appliance in the washing solution tank, there is a recess at the outlet for sedimentation.

Due to this, a technical advantage is achieved, consisting in the possibility of efficient accumulation of contaminants, for example, pile, deposited in the recess in the tank for washing solution, and their removal from the pumping system. If contaminants are deposited in the recess of the washing solution tank, the pump is prevented from pumping contaminants through the pipeline. As a result, clogging of the pumping system with contaminants is prevented.

In a further preferred embodiment of the laundry care appliance, the pumping system comprises a filter unit, the filter unit being located in a conduit or outlet, and the filter unit preferably comprising a foreign body trap for removing foreign objects.

Due to this, a technical advantage is achieved consisting in the ability to effectively remove contaminants or foreign bodies from the washing solution through the filter unit. In particular, it is possible to filter out impurities from the pipeline or from the washing solution tank near the outlet of the washing solution tank, thereby preventing clogging of the pipeline or the inlet of the pumping system with impurities.

Brief Description of the Drawings

Embodiments of the invention are presented in the drawings and are described in more detail below.

Showing:

FIG. 1 is a schematic view of a laundry care appliance;

FIG. 2 is a schematic view of a pumping system with a washing solution tank, and

FIG. 3 is a schematic view of a deflecting member in a pumping system.

The implementation of the invention

In FIG. 1 is a schematic view of a general type laundry treating apparatus 100, such as a washing machine. The laundry care appliance 100 comprises a receiver 101 that can be filled with detergents or other liquid substances. The laundry care apparatus 100 includes a door 103 for loading laundry with the laundry care appliance 100.

In FIG. 2 shows a pumping system 105 in a laundry care device 100 with a detergent solution tank 107 that includes an inlet 109 and an outlet 111. The inlet 109 is connected to the outlet 111 through a pipe 113. The pipe 113 includes a pump 115 that is integrated into the wire 113. The pump 115 pumps the washing solution through the outlet 111 from the tank 107 for the washing solution into the pipe 113 and pumps the washing solution through the inlet 109 again into the tank 107 for the washing solution. This allows for efficient pumping of the washing solution in the pumping system 105.

In FIG. 3 shows a view of the deflecting member 117 in the pumping system 105. The deflecting member 117 comprises a deflecting portion 119 and a support region 121. The pipe 113 flows into the washing solution tank 107 through the inlet 109. This allows the washing solution to be pumped through the pipe 113 to tank 107 for the washing solution. The supporting region 121 is fixed at one end of the pipe 113 near the inlet 109. The supporting region 121 is connected to the deflecting section 119. The supporting region 121 allows for stable mounting of the deflecting element 117 in the pipe 113.

The washing solution is conducted through a pipe 113 in the direction 123 of the flow. The washing solution exits through the inlet 109 of the conduit 113 in the form of a jet of washing solution and runs into the deflecting element 117. The support region 121 is arranged so that it does not interfere with the flow of the washing solution, so that the jet can enter the deflecting section 119. When the washing solution enters to the deflecting portion 119, the flow of the washing solution changes direction and is injected into the tank 107 for the washing solution in the deflected direction 125 of the flow.

When the washing solution enters the deflecting element 117, not only does the initial direction 123 of the washing solution jet move, but also the flow of the washing solution under the influence of tangential forces is divided into drops of the washing solution, so that a mixture of the washing solution with air is formed, which is injected into the tank 107 for washing solution. As a result of this, an effective distribution of the injected washing solution to the laundry located in the washing solution tank 107 is achieved.

To achieve an effective deviation of the direction 125 of the flow of the washing solution, the pipe 113 must have a diameter 127 (d1), which is less than the distance 129 (d2) between the inlet 109 and the place of the deflecting section 119, which is connected to the supporting region 121. Due to that the distance 129 (d2) is greater than the diameter 127 (d1) of the pipe 113, clogging is prevented by contaminants passing through the pipe 113 and leaving the inlet 109, the intermediate space between the inlet 109 and the deflecting section 119.

The implementation of the deflecting element 117 allows for the effective injection of the washing solution into the tank 107 for the washing solution. In particular, the geometric shape of the inlet 109 may affect the spraying behavior without clogging the gap between the inlet 109 and the deflecting section 119 of the pipe 113. The clogging of the inlet 109 is prevented because the spray pattern of the water jet is not realized by narrowing the inlet 109, but counting the distance 129 (d2) between the inlet 109 and the deflecting portion 119. Thus, a pumping system 105 is provided that allows efficient pumping of the washing solution, n e without exposing the detergent solution to the detergent tank 107 at risk of clogging.

All the features explained and shown in combination with the individual embodiments of the invention can be provided in the subject invention in various combinations in order to simultaneously realize their preferred effects.

The scope of the invention is defined by the claims and is not limited to the features explained in the description or shown in the figures.

Designations

100 laundry care appliance

101 receiver

103 door

105 pumping system

107 tank for cleaning solution

109 inlet

111 outlet

113 pipeline

115 pump

117 deflecting element

119 deflection section

121 reference area

123 direction of flow of the washing solution

125 deviated flow direction of the wash solution

127 pipe diameter

129 distance between inlet and deflection section

Claims (14)

1. The device (100) for the care of linen with a pumping system (105), which contains a tank (107) for receiving detergent solution, and the tank (107) for the washing solution contains an inlet (109) and an outlet (111) , a pipe (113) connecting the inlet (109) to the outlet (111), and a pump for pumping the washing solution from the outlet (111) through the pipe (113) to the inlet (109), characterized in that the pumping system (105) contains a deflecting element (117) with a deflecting section (119) for redirecting the flow of the washing solution pumped from the inlet (109) to the tank (107) for the washing solution, and the deflecting section (119) is located at a distance ( 129) from the inlet (109), the distance (129) being greater than the diameter (127) of the pipe (113), the deflecting element (117) having a support region (121) that connects the pipe (113) to the deflecting section (119) ), while the supporting region (121) is made in such a way that it is not blocking There is a spray trajectory of the washing solution pumped out of the pipeline (113), and is fixed at one end on the outer region of the pipeline (113) and the other at the deflecting section (119). 2. A laundry care device (100) according to claim 1, characterized in that the deflecting section (119) contains a pad that makes it possible to spray it with the pumped-out washing solution in order to inject the washing solution into the washing solution tank (107). 3. A laundry care device (100) according to claim 2, characterized in that the deflecting portion (119) is at an angle of 25 ° to 65 ° to the direction of the jet of the injected washing solution pumped out of the inlet (109). 4. The device (100) for the care of linen according to one of the preceding paragraphs, characterized in that the deflecting element (117) is made in the form of a curved metal plate, rubber plate or plate of synthetic material. 5. The device (100) for care of linen according to one of the preceding paragraphs, characterized in that the surface of the deflecting section (119) contains a recess, groove or rib. 6. The device (100) for care of linen according to one of the preceding paragraphs, characterized in that the supporting region (121) is made in the form of a rod, bridge or plate. 7. Laundry care appliance (100) according to one of the preceding claims, characterized in that the inlet (109) is located on the front or top side of the washing solution tank (107), and the outlet (111) is located on the lower side of the tank (107) for the cleaning solution. 8. A laundry care device (100) according to one of the preceding claims, characterized in that the deflecting element (117) is located on the front or top side of the washing solution tank (107). 9. A laundry care device (100) according to one of the preceding claims, characterized in that the pumping system (105) comprises a fill level sensor, the fill level sensor being configured to detect a level of the washing solution in the washing solution tank (107), and the pump (115) is configured to control performance depending on the recorded fill level. 10. A laundry care device (100) according to one of the preceding paragraphs, characterized in that a flow sensor is located in the pipe (113), the flow sensor being configured to detect the flow rate of the washing solution in the pipe in a certain time interval, and the pump is made with the possibility of regulating its performance depending on the flow rate recorded in the time interval. 11. Laundry care device (100) according to claim 10, characterized in that the pump (115) is configured to change the frequency of the pump (115), or the pressure it creates, or the pump, to control the pump performance. 12. The device (100) for the care of linen according to one of the preceding paragraphs, characterized in that in the tank (107) for the washing solution at the outlet (111) there is a recess for sedimentation of contaminants. 13. A laundry care device (100) according to one of the preceding claims, characterized in that the pumping system (105) comprises a filter unit, the filter unit being located in the pipe (113) or in the outlet (111), wherein the filter unit preferably contains a trap for foreign bodies, which serves to remove foreign objects.

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