TW201906666A - Powder controlled release device - Google Patents

Abstract

The invention relates to a device for feeding a powder into a fluid flow, with a dosing element (2), which can be driven in rotation in a storage volume (1) about an axis of rotation and has dosing chambers (3) open to the storage volume (1), wherein the dosing chambers (3) are filled with the powder (4) stored in the storage volume during the rotation of the dosing element (2) and are emptied into the fluid flow at an emptying point. The powder (4) is moved by means of an agitator (11) arranged and driven in rotation in the storage volume (1). The wall (5) of the storage volume (1) is assigned movement influencing means (6, 16), with which the movement of an agitator arm (12) or an actuation extension (13) fastened to the agitator arm (12) is influenced in such a way that a radial and/or axial movement deflection of the agitator arm (12) or the actuation extension (13) are/is brought about.

Description

   Powder controlled release device   

The invention relates to a device for feeding powder into a fluid flow, comprising a metering element having a metering chamber open towards its storage volume which can be driven in rotation in a storage volume around a rotation axis, wherein During the rotation of the metering element, the metering chambers are filled with the powder stored in the storage volume and the fluid flow is discharged at the emptying position.

CN 201737998 U describes a dosing element in the form of a disc, which contains a dosing chamber arranged in a circle to surround the center of the disc, which is filled during the rotation of the dosing disc powder. In the emptying position, the fluid flow, in particular the air flow, can blow out the powder conveyed in the metering chamber. Through the rotation speed of the metering element, the mass flow of the aerosol can be generated.

CN 201511132 U, CN 201512581 U and JPH 09253476 disclose stirring devices or vibrating elements for affecting powders stored in storage volumes.

The purpose of the present invention is to improve the dosing device that works by rotating the dosing disc, thereby improving the dosing accuracy.

The solution of the present invention to achieve the above-mentioned object is the invention given in the scope of patent application, in which the appended items are not only the better technical solutions of the invention given in the independent item, but also the independence to achieve the above-mentioned object solution. The features of the ancillary items can be combined with each other in any form. The present invention first and substantially proposes that a stirring device is provided in the storage volume, and the powder stored in the storage volume is moved by the stirring device. For this, the stirring device has at least one stirring arm. The at least one stirring arm preferably passes through the storage volume in a circular motion. The storage volume may have a wall portion that extends into the metering channel in the shape of a funnel, wherein the metering channel extends on a circular arc. The components of the stirring arm preferably extend to the bottom of the metering channel or to the bottom of the metering channel. The bottom of the metering channel is formed by a metering element or has a metering element, and the metering element can be formed by a circular disk or a ring. The dosing element has several dosing chambers arranged around the axis of rotation of the dosing element on a circular arc. The dosing rooms can be rounded. However, the dosing chamber can also be open towards the periphery of the dosing element. In essence, for example, a dosing chamber with a circular profile is open towards the storage volume, so that powder can enter the dosing chamber. The stirring device above the dosing chamber and in particular the stirring arm or the operating protrusion formed by the stirring arm allow the powder to move in the area directly above the dosing chamber to fill the dosing chamber in a reproducible way powder. The rotational movement of the metering element conveys the filled metering chamber to the emptying position, where a fluid flow, such as a gas flow, passes through the metering chamber. For this purpose, the metering chambers are preferably open both towards the storage volume and towards the bottom through which the metering element slides. The bottom has an opening in the evacuation position, and the air flow conveying the powder can pass through the opening to leave. Within the storage volume, movement influencing means are preferably provided, which are in particular fixedly connected to the wall of the storage volume. These movement influence means constitute a mechanical obstacle, and the moving stirring arm or the operation protrusion fixed on the stirring arm must circumvent these obstacles. Preferably, the stirring arm or the operating protrusion is moved in a circular motion, wherein the center of the circle can be the center of the rotational movement of the metering element. By means of various motion influencing means, the motion of the stirring arm or the operating protrusion is deviated from the circular motion. This can be radial deflection or axial deflection, but also azimuthal deflection. In order to realize the radial motion deflection, the stirring arm or the operation protrusion is deflected in the radial direction by motion influencing means. In this case, the motion influencing means may be a radial protrusion located on the wall of the storage volume. As far as the axial movement deflection is concerned, the stirring arm or the operating protrusion is deflected in a direction from a plane of movement. In particular, as far as the deflection of the azimuth angle is concerned, the movement of the stirring arm or the operating protrusion is first decelerated. For this purpose, the stirring arm or the operating protrusion runs towards the obstacle. Deformation occurs based on the elasticity of the stirring arm or manipulation protrusion until the stirring arm or manipulation protrusion crosses the obstacle. In this case, the acceleration of the stirring arm or the operating protrusion occurs again. The stirring device and the metering element can be driven by the same rotary drive. Therefore, the stirring device can be driven to rotate by the metering element. The stirring arm may have a spiral shape or a spiral shape or a combination of the two shapes. A manipulating protrusion can be provided on the free end of the stirring arm. However, the stirring arm may also have a grid plate, which is plowed by the powder in the rotating motion of the stirring device. A gear ring may be provided, and a pinion gear is clamped thereon, so as to rotate and drive the stirring device independently of the metering element. Manipulating the protrusion or another section of the stirring arm can also slide over the metering element. Thereby, the edge of the manipulating protrusion sliding through the opening of the metering element can act as a scraper. By this scraper function, the filling of the metering chamber of the metering element can be optimized separately. The stirring arm or the operating protrusion can slide through the metering chamber under the urging force towards the metering element.

1‧‧‧Storage volume

2‧‧‧Dosing components

3‧‧‧Dosing room

4‧‧‧ powder

5‧‧‧ (cylindrical) wall

5'‧‧‧ (tapered) wall

6‧‧‧ (sports) influence means

7‧‧‧fluid channel

8‧‧‧ (bottom) exit

9‧‧‧Bottom

10‧‧‧rotation axis

11‧‧‧Stirring device

12‧‧‧Mixing arm

13‧‧‧manipulation protrusion

14‧‧‧Gear ring

15‧‧‧Grid plate

16‧‧‧ (Sports) influence means; manipulation protrusion

17‧‧‧Cone section

18‧‧‧pinion

19‧‧‧ring element

FIG. 1 is a schematic cross-sectional view of the first embodiment.

Fig. 2 is a perspective sectional view of the first embodiment.

Fig. 3 is a cross-sectional perspective view of a second embodiment.

4 is a schematic cross-sectional view taken along line IV-IV in FIG. 3.

5 is a perspective perspective view of the components of the storage volume 1. FIG.

6 is a cross-sectional view of a third embodiment of the invention.

The embodiments of the present invention will be described below with reference to the drawings. The embodiment shown in FIGS. 1 and 2 is a powder dispenser with a storage volume 1 which is surrounded by a cylindrical wall 5 and a tapered wall 5 ′ connected to the wall. In addition, a tapered section 17 is provided in the center of the storage volume 1, so that the storage volume 1 has a ring shape in the lower region and has a tapered section toward the bottom.

The metering element 2 is provided in the area of the bottom 9. The metering element is a disk with a substantially circular or circular ring shape, and it has a plurality of windows arranged on a circular arc line. Each of these windows forms a dosing room. The metering element 2 rotates around the axis of rotation 10 above the bottom 9. During the rotation of the metering element 2, the metering chamber 3 is filled with powder 4 stored in the storage volume 1.

The bottom 9 has an outlet 8 in a circumferential direction. However, the bottom 9 may also have outlets 8 at several circumferential positions. During the rotational movement of the metering element 2, the metering chamber 3 successively enters the overlapping position with the outlet 8. The outlet 8 corresponds to the fluid channel 7, the mouth of which is arranged on the wide surface of the metering element 2 opposite the bottom 9 in alignment with the outlet 8, so the fluid flowing through the fluid channel 7 The metering element 3 is passed to flow, and the powder conveyed to the outlet 8 in the metering chamber 3 is sent out from the metering chamber 3. The fluid flow may be a gas flow.

Within the storage volume 1 a stirring device 11 is provided, which has a stirring arm 12. In the embodiment shown in FIGS. 1 and 2, the stirring arm 12 is constituted by a single spiral elastic body. However, several stirring arms 12 with other technical solutions can also be provided. In the embodiment shown in FIGS. 1 and 2, the stirring arm 12 is driven by the rotational movement of the metering element 2. However, the stirring device 11 may also have its own driver. The stirring device 11 can be rotationally driven so that its rotational movement is in the same direction as the rotational movement of the metering element 2. However, the metering element 2 and the stirring device 11 can also rotate in opposite directions of rotation.

The free end of the stirring arm 12 forms an actuating protrusion 13 having a sweeping bottom of the storage volume 1 or a lower end of the metering element 2 during the rotational movement of the stirring device 11. The widened lower section of the operating projection 13 slides over the metering chamber 3.

At least one influencing means 6 is provided for influencing the uniform movement of the operating protrusion 13 in other situations. In the embodiment shown in FIGS. 1 and 2, the influence means 6 are formed through the end of the fluid channel 7 extending into the storage volume 1. The obstacle thus formed makes it necessary to displace the manipulation protrusion 13 in the axial direction to pass the influence means 6. The axial displacement of the steering protrusion 13 is also related to the effect of azimuth movement. First, the deceleration is performed, and the acceleration is accelerated while passing over the influence means 6.

The embodiment shown in FIGS. 3 to 5 has a stirring device 11 which has a gear ring 14 in the upper region thereof, which is rotationally driven by a pinion 18, which can be rotationally driven by an electric motor. The stirring device 11 forms a total of four stirring arms 12 which are connected to the ring element 19. The ring element 19 is located in the conical area of the storage volume 1. An operating protrusion 13 is fixed on the ring element 19. The manipulation protrusion 13 is a leaf spring-shaped elastic element, which can be deformed in the radial direction in this embodiment. The free end of the actuating projection 13 projects until it is directly above the metering element 2 arranged in the bottom area of the storage volume 1. In an alternative technical solution, the leaf spring-like elastic elements can be deformed in the circumferential direction.

At four circumferential positions, a fluid channel 7 is connected above the dosing element 2 and above the outlet 8 to blow out the powder fed into the dosing chamber 3 through the outlet 8. The mouth of the fluid channel 7 is spatially located in a radially inward protrusion forming the influence means 6.

As shown in FIG. 4, the influence means 6 has a wall portion that extends in an arc shape in the plane of rotation, and the lower section of the manipulation protrusion 13 can slide along the wall portions, so that the manipulation protrusion 13 is radially self-circular Line deviation. The wall of the influence means 6 thus forms a control surface for controlling the movement of the manipulation protrusion 13. Between the influence means 6, the wall portion of the storage volume 1 extends on a circular arc in the rotation plane shown in FIG. To some extent, the influence means 6 form an arch that extends radially into the storage volume 1.

The embodiment shown in FIG. 6 is similar to the embodiment shown in FIGS. 3 to 5. This embodiment also has a tapered section 17, so that the storage volume 1 is ring-shaped in the area directly above its bottom, where the radial distance of the two ring walls decreases towards the bottom.

During the rotational movement of the stirring arm 12, the operating projection 13 slides over the metering element 2 and deviates from the circular movement trajectory in other cases in the area of the influence means 6. The end of the manipulation protrusion 13 directed to the metering element 2 constitutes a scraping edge, which slides through the metering chamber 3 and helps to uniformly fill the metering chamber 3 with powder.

The foregoing embodiments are used to illustrate the inventions included in the entire application. These inventions independently constitute improvements to the prior art through at least the following feature combinations. One or all of them are combined with each other, that is, an apparatus characterized by being provided with a stirring device 11 provided in the storage volume 1 and rotatably driven, and the stirring device includes at least one stirring arm 12 for moving the powder 4.

An apparatus, characterized in that it is provided with motion influencing means 6, 16 fixedly corresponding to the wall 5 of the storage volume 1, and these motion influencing means are used to influence the stirring arm 12 or the manipulation protrusion fixed on the stirring arm 12 The movement of 13.

A device characterized in that the movement influencing means 6, 16 are constructed and arranged such that they cause a radial and / or axial movement deflection of the stirring arm 12 or the operating protrusion 13.

A device characterized in that the stirring arm 12 is elastically deformable and / or has an elastically deformable operating protrusion 13, wherein the stirring arm 12 and / or the operating protrusion 13 form a scraper that slides through the metering chambers 3 Wipe the edges.

A device characterized in that the motion influencing means 6, 16 causes the axial, radial and / or azimuth acceleration and deceleration of the stirring arm 12 or the motion protrusion 13.

A device characterized in that the stirring device 11 is driven by the dosing element 2 in rotation, or has its own rotary drive.

A device, characterized in that the stirring device 11 has a stirring arm 12 extending in a spiral shape and / or a spiral shape, wherein a moving protrusion 13 is provided on one end of the stirring arm 12 in particular, which is abutted against量 件 2。 On the amount of components 2.

A device characterized in that the stirring device 11 has a gear ring 14.

A device characterized in that the operating protrusion 13 is an elastic element in particular a leaf spring shape, which is fixed on the stirring arm 12 in a manner that can be elastically constructed in the radial, axial and / or azimuth directions.

All the disclosed features (as a single feature or a combination of features) are the essence of the invention. Therefore, the contents disclosed in this application also include all the contents disclosed in the relevant / attached priority files (copies of previous applications), and the features described in these files are also included in the scope of patent applications in this application. The subsidiary item describes the characteristics of the present invention's improvement scheme with respect to the prior art with its characteristics, and its main purpose is to make a divisional application based on these claims. In addition, the inventions given in each claim can have one or more of the features disclosed in the foregoing description, particularly indicated by element symbols and / or given in the description of element symbols. The invention also covers embodiments that do not realize the individual features of the aforementioned features, especially if these features are not indispensable for specific uses or can be replaced by other equivalent means.

Claims (9)

    A device for feeding powder into a fluid flow, comprising a plurality of dosing chambers (3) open to the storage volume (1) which can be driven to rotate around a rotation axis in a storage volume (1) ) Of a metering element (2), wherein during the rotation of the metering element (2), the metering chambers (3) are filled with powder (4) stored in the storage volume (1), and The fluid flow is discharged at the emptying position, and further includes a rotatably driven stirring device (11) arranged in the storage volume (1) having at least one stirring arm (12) for moving the powder (4), The utility model is characterized in that a motion influencing means (6, 16) is provided, which is arranged on the elastically deformable stirring arm (12) or an elastically deformable actuating protrusion fixed on the stirring arm (12) ( In the motion trajectory of 13), the motion influencing means is used to influence the motion of the stirring arm (12) or the manipulation protrusion (13).         The device of claim 1, wherein the motion influencing means is fixedly arranged on the wall portion (5) of the storage volume (1).         The device of claim 1, wherein the motion influencing means (6, 16) is constructed and arranged such that it causes radial and / or axial movement of the stirring arm (12) or the operating protrusion (13) Motion deflection.         The device according to claim 1, wherein the stirring arm (12) and / or the manipulation protrusion (13) form a scraping edge that slides over the dosing chambers (3).         The device of claim 1, wherein the motion influencing means (6, 16) causes the axial, radial and / or azimuth acceleration of the stirring arm (12) or the motion protrusion (13) and slow down.         The device according to claim 1, wherein the stirring device (11) is driven by the dosing element (2) in rotation, or has its own rotary drive.         The device according to claim 1, wherein the stirring device (11) has a spirally and / or spirally extending stirring arm (12), and / or, a movement is provided on one end of the stirring arm (12) A protrusion (13), which bears against the metering element (2).         The device according to claim 1, wherein the stirring device (11) has a gear ring (14).         The device according to claim 1, wherein the manipulation protrusion (13) and / or an elastic element in the form of a leaf spring is fixed to the elastically constructed way in the radial, axial and / or azimuth directions On the stirring arm (12).