Dry powder dispersing head and dry powder disperser including the same

Abstract

The present invention relates to a dry powder dispersing head and a dry powder disperser including the same. The dry powder dispersing head comprises: a body having a slide and a first air guide channel, the slide runs through the upper surface of the body to the lower surface, the first air guide channel is connected to the slide from the outside of the body; a flap installed on the lower surface of the body in a manner that can pivot between a closed first position and an open second position; a flap retaining device installed on the body, which can releasably retain the flap in the first position by magnetic force; and a piston having a limiting portion at the first end and an extension portion at the second end, which is airtightly inserted in the slide in a slidable and removable manner, and has a second air guide channel from the side to the second end, when the flap is in the first position, the extension portion defines a dry powder accommodating space between the second end of the piston and the flap, when the flap is in the second position, the limiting portion abuts against the body to define the position of the piston, and the second air guide channel is connected to the first air guide channel.

Description

Technical Field

[0001] The present invention relates to the technical field of dry powder particle analysis; in particular, the present invention relates to a dry powder dispersing head and a dry powder disperser comprising the same. Background Art

[0002] In the case of particle size and shape analysis of dry powder particles, a dry powder disperser is needed to quickly and evenly separate the aggregated or even somewhat sticky dry powder. In the prior art, a thin film disperser is used for dry powder dispersers. The thin film is a consumable material and needs to be replaced with a new one each time the dispersion is performed. The pressure of the film breaking during dispersion by the thin film disperser is related to the thickness of the film. However, for some brittle and fragile dry powder samples, such as urea, even with the thinnest film, the dry powder may break during dispersion.

[0003] The technical problem to be solved by the present invention is to make brittle dry powder or fragile dry powder less likely to be broken during dispersion through the design of a dry powder dispersion head and a dry powder disperser; no consumables are required when dispersing dry powder particles; and / or the operation is simple and convenient. Summary of the invention

[0004] In view of this, the present invention provides a dry powder dispersing head and a dry powder disperser including the same, so as to solve or at least alleviate one or more of the above-mentioned technical problems and other problems existing in the prior art.

[0005] First, according to one aspect of the present invention, a dry powder dispersing head is provided, wherein the dry powder dispersing head comprises: a body, the body having a slide and a first air guide channel, the slide extending from the upper surface of the body to the lower surface of the body, and the first air guide channel connected to the slide from the outside of the body; a flap, the flap being mounted on the lower surface of the body in a manner capable of pivoting between a first position and a second position, in the first position, the flap closing the lower opening of the slide, and in the second position, the flap opening the lower opening of the slide; a flap retaining device, the flap retaining device being mounted on the body, the flap retaining device being capable of pivoting between a first position and a second position, The flap is held in the first position in a releasable manner by magnetic force; and a piston, wherein a limiting portion is formed at the first end of the piston, and the piston is inserted into the slideway in an airtight manner in a slidable and removable manner, and an extension portion is formed at the second end of the piston, and the piston has a second air guide channel leading from its side to the second end, wherein when the flap is in the first position, the extension portion defines a space for accommodating dry powder between the second end of the piston and the flap, and when the flap is in the second position, the limiting portion defines the position of the piston by abutting against the body, and the second air guide channel is connected to the first air guide channel. This design of the dispersing head avoids the use of film consumables and alleviates the problem that brittle dry powder or fragile dry powder is easy to break during dispersion.

[0006] Optionally, in the dry powder dispersing head as described above, the flap has a magnetic component, and the flap holding device is a magnet with a magnetic force adjustment device. With the flap holding device designed in this way, when the flap is in the first position, the flap closes the lower opening of the slideway under the adsorption effect of the magnetic force.

[0007] Optionally, in the dry powder dispersing head as described above, the magnetic force adjustment device is a screw screwed into a through hole of the body, the through hole guides the end of the screw toward the magnetic attraction component, and the magnet is attached to the end of the screw. With the magnetic force adjustment device designed in this way, the screw can be rotated to adjust the size of the magnetic gap between the flap and the magnet, thereby adjusting the size of the magnetic force between the flap and the magnet.

[0008] Optionally, in the dry powder dispersing head as described above, the magnet is an electromagnet having an electromagnetic coil, and the magnetic force regulating device is a current regulating device of the electromagnetic coil.

[0009] Optionally, in the dry powder dispersing head as described above, the dry powder dispersing head has a cylindrical guide attached to the lower surface of the body, and the guide provides a turning cavity for the flap.

[0010] Optionally, in the dry powder dispersing head as described above, the direction of the slideway is parallel to the axial direction of the turnover chamber.

[0011] Optionally, in the dry powder dispersing head as described above, the slideway and the piston respectively have marks for circumferentially aligning the first air guiding channel and the second air guiding channel.

[0012] Optionally, in the dry powder dispersing head as described above, the air inlet portion of the second air guide channel is an annular groove that is open along the entire circumference of the outer side of the piston. Thus, when the piston is inserted into the slideway from any circumferential direction, the first air guide channel and the second air guide channel can communicate with each other.

[0013] Optionally, in the dry powder dispersing head as described above, in the second position, the flap is suspended due to gravity.

[0014] Optionally, in the dry powder dispersing head as described above, the flap comprises a plurality of flaps that are split into two halves, thereby making it possible to disperse the dry powder more evenly, rather than dispersing toward only one side.

[0015] Optionally, in the dry powder dispersing head as described above, the protruding portion is located at the periphery of the second end of the piston, and the terminal end of the protruding portion is a pointed end.

[0016] Optionally, in the dry powder dispersing head as described above, the number of the protruding parts is two, and the two protruding parts are respectively located at two ends of the diameter of the piston parallel to the pivot axis of the flap, thereby minimizing the amount of dry powder pressed.

[0017] Secondly, according to another aspect of the present invention, a dry powder disperser is provided, wherein the dry powder disperser includes the dry powder dispersing head.

[0018] From the following detailed description in combination with the accompanying drawings, the principles, characteristics, features and advantages of the various technical solutions according to the present invention can be clearly understood. The solution of the present invention can overcome or at least alleviate the defects or deficiencies existing in the existing thin film dispersing head, especially avoid the use of thin film consumables, reduce the possibility of brittle dry powder or fragile dry powder breaking during dispersion and / or improve the simplicity and convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] With reference to the accompanying drawings, other features and advantages of the present invention will become more apparent through the following detailed description of exemplary embodiments of the present invention; however, it should be understood that the accompanying drawings are only for illustrative purposes and do not limit the scope of the present invention.

[0020] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the dry powder dispersing head of the present invention, which is installed in a dry powder disperser;

[0021] Figure 2 for Figure 1 A schematic cross-sectional view of an embodiment of a dry powder dispersing head, wherein the piston is not shown;

[0022] Figure 3 for Figure 1 A schematic cross-sectional view of an embodiment of a dry powder dispersing head of FIG. 1 , wherein a piston is shown and a flap is in a closed position; and

[0023] Figure 4 for Figure 1 A schematic cross-sectional view of an embodiment of a dry powder dispersing head is shown, wherein a piston is shown and a flap is in an open position. DETAILED DESCRIPTION

[0024] The exemplary embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. The components and structures in the accompanying drawings are only schematic and are not necessarily drawn to scale. It should be understood that unless otherwise specifically stated, the relative arrangement of the components and steps described in these embodiments is only illustrative and is not intended to limit the scope of the present invention.

[0025] In this document, the terms “first” and “second” are only used for the purpose of distinguishing between the two but are not intended to indicate their order and relative importance.

[0026] In addition, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the drawings, the present invention still allows any combination or addition or deletion between these technical features (or their equivalents) without any technical obstacles, so it should be considered that these more embodiments according to the present invention are within the scope of the description of this article. In addition, for the sake of brevity, general matters that are already known to those skilled in the art will not be described in detail in this article.

[0027] Figure 1 The cross-sectional structure diagram of an embodiment of the dry powder dispersing head of the present invention is installed in a dry powder disperser. In the illustrated example, the dry powder dispersing head 8 can be assembled to the dry powder disperser. As a component of the dry powder disperser, its function is to hold the sample and release and disperse the sample onto the test sample plate 10 in a timely manner when the vacuum chamber 9 generates negative pressure. The assembly of the dry powder dispersing head 8 to the dry powder disperser can be basically airtight to ensure the vacuum pressure in the vacuum chamber 9 during dispersion.

[0028] from Figure 1As can be seen in the figure, the dry powder dispersing head 8 of this embodiment of the present invention is usually arranged on the top of the dry powder disperser, and the axial direction of the dry powder dispersing head can be optionally parallel to the axial direction of the vacuum chamber 9. The side of the disperser housing 91 can be provided with a negative pressure channel 92, through which a vacuum pump (not shown) is connected to the vacuum chamber 9, and is used to put the vacuum chamber 9 in a negative pressure state when dispersing dry powder. Figures 2 to 4 And its description will be clearer.

[0029] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of an embodiment of a dry powder dispersing head, wherein the piston is not shown. As shown in the figure, the dry powder dispersing head 8 may include a body 1, a cylindrical guide 2, a flap 3, and a flap holding device 6, and the dry powder 5 is placed on the flap 3.

[0030] According to the diagram, in this embodiment, the body 1 may have a slide 11 and a first air guiding channel 12, the slide 11 runs from the upper surface of the body 1 to the lower surface of the body 1, and the first air guiding channel 12 is connected to the slide 11 from the outside of the body 1. In other optional embodiments, the slide 11 and the first air guiding channel 12 may have various appropriate shapes. For example, they may be inclined. Depending on the specific circumstances, the slide 11 may also be substantially vertical, and the first air guiding channel 12 may also be substantially vertical. The first air guiding channel 12 may also be curved. In the illustrated example, the slide 11 and the first air guiding channel 12 are both straight channels.

[0031] In this embodiment, the dry powder dispersing head 8 further includes a flap 3, which is mounted on the lower surface of the body 1 in a manner that allows it to pivot between a closed first position and an open second position. Specifically, the first end of the flap 3 can be pivotally connected to the lower surface of the body 1 or fixed to the lower surface of the body 1 in other ways, so that the second end of the flap 3 can be flipped with the first end as a pivot. When the flap 3 is in the first position, as shown in FIG. Figure 2 or Figure 3 As shown, the flap 3 closes the lower opening of the slideway 11. In the second position, as shown in FIG. Figure 4 As shown, the flap 3 opens the lower opening of the slide 11. In an optional embodiment, the flap 3 can fully open the lower opening of the slide 11, for example, vertically hang under the action of gravity, so that the piston 7 extends from the slide 11, thereby avoiding obstruction of the dry powder falling.

[0032] In this embodiment, the dry powder dispersing head 8 also includes a flap holding device 6, which is installed on the body 1. Figure 2 or Figure 3 As shown, the flap holding device 6 can retain the flap 3 in the first position in a releasable manner by magnetic force. Figure 4As shown, the flap can be released to the second position by axial rotation. In a specific example, the flap retaining device 6 can be adjustable, and can be in the form of a magnet attached to a screw as shown in the figure, or in the form of an electromagnet. A flap retaining device with non-adjustable magnetic force is not excluded here.

[0033] In this embodiment, the dry powder dispersing head 8 further includes a piston 7 . Figure 3 and Figure 4 FIG1 is a schematic diagram of the cross-sectional structure of an embodiment of the dry powder dispersing head, in which a piston is shown, and the flap is located in the closed position and the open position respectively. The piston 7 can be made of plastic or metal, and has basic airtightness with the body 1. For example, the piston used in this embodiment can be a plastic piston, and its outer surface is as close to the surface of the slide 11 as possible. When the piston 7 is inserted into the slide 11, it can play an airtight role. Here, the airtightness can also have a slight gap, so that when Figure 1 The vacuum chamber 9 is shown in a negative pressure state. When the piston 7 slides downward under the negative pressure, although air is sucked in through the gap between the piston 7 and the body 1, a reverse negative pressure is instantly generated, which can push the flap 3 open. Therefore, the required operation can be achieved even if there is a slight gap that leaks air. Therefore, the downward sliding of the piston 7 does not rely entirely on gravity, but can also rely on the suction force of the negative pressure to be attracted downward and slide down.

[0034] In this embodiment, a limiting portion 71 is formed at the first end of the piston 7, which can prevent the piston 7 from falling down from the slide 11 into the vacuum chamber 9. The piston 7 can be inserted into the slide 11 in a slidable and removable manner in a substantially airtight manner to prevent pressure release between the two during vacuuming. As shown in the figure, a protruding portion 72 can be formed at the second end of the piston 7. At the same time, a second air guide channel 73 is provided in the piston 7 from its side to the second end. When the flap 3 is in the first position, as shown in FIG. Figure 3 As shown, the extension 72 defines a space for accommodating dry powder between the second end of the piston 7 and the flap 3, and when the flap 3 is in the second position, as shown in FIG. Figure 4 As shown, the limiting portion 71 limits the position of the piston by abutting against the body 1, so that the piston will not be sucked in by the suction force of the negative pressure. Figure 1 In the vacuum chamber 9 shown.

[0035] The piston 7 slides from the first position to the second position due to gravity and / or vacuum suction. The piston 7 pushes open the flap 3 during the downward sliding process. At this time, as the magnetic gap increases, the magnetic force will weaken faster, causing the piston 7 to continue to move downward and the flap 3 to open further. Figure 4 When the flap 3 is in the position shown, the flap 3 is completely opened, and at the same time, the second air guide channel 73 is connected to the first air guide channel 11. When the air path is connected, the external air flows in the following manner: Figure 1 The negative pressure in the vacuum chamber 9 shown in the figure quickly enters and blows the dry powder 5 to be dispersed through the first air guide channel 11 and the second air guide channel 73. The piston 7 of this design can open the flap 3 on the one hand, and ventilate the dry powder to quickly disperse it on the other hand.

[0036] In this embodiment, the flap 3 has a magnetic component, and its material can be stainless steel. The magnetic component can be a magnet or a metal suitable for being attracted by a magnet. In an optional embodiment, according to specific needs, the flap holding device 6 can also be set as a magnet or a metal suitable for being attracted by a magnet, and a component with adjustable magnetic force can be set on the flap 3.

[0037] In an alternative embodiment, the material of the flap 3 may be corrosion-resistant plastic. In order to achieve magnetic attraction to the flap 3, an iron block may be attached to it, or a small magnet may be placed under it, so that magnetic adsorption with the flap holding device 6 can be achieved. Thus, the flap 3 replaces the film, and the film consumables do not need to be replaced every time the film is dispersed, which saves the use cost.

[0038] exist Figures 2 to 4 In the embodiment, the flap holding device 6 is a magnet 61 with a magnetic force regulating device. The magnet can be an aluminum iron boron magnet, which has relatively good magnetic properties. Other magnet materials are not excluded here. With the flap holding device 6 designed in this way, there is a magnetic force between the magnetic attraction component on the flap 3 and the magnet 61. When the flap 3 is in the first position, as shown in FIG. Figure 2 or Figure 3 As shown, under the adsorption effect of magnetic force, the flap 3 can close the lower opening of the slideway 11.

[0039] In this embodiment, the magnetic force adjustment device can be a screw 62 screwed into a through hole of the body 1, the through hole guides the end of the screw 62 toward the magnetic attraction component on the flap 3, and the magnet 61 is attached to the end of the screw 62. By adjusting the screw 62, the magnetic attraction force can be adjusted, thereby adjusting the vacuum suction force required to open the flap 3, thereby changing the airflow intensity for dispersing the dry powder 5.

[0040] For example, if the dry powder 5 to be dispersed is not completely dispersed or there is still some dry powder 5 to be dispersed on the flap 3, the adjusting screw 62 is appropriately rotated clockwise before the next dispersion to appropriately reduce the gap between the magnet 61 and the flap 3. In this way, the magnetic force is further enhanced, and thus the dispersion pressure will be appropriately increased.

[0041] In addition, in this embodiment, if it is found that the dry powder 5 to be dispersed is broken before being blown away by the gas ejected from the air guide channel due to excessive dispersion pressure, the adjustment screw 62 is appropriately rotated counterclockwise before the next dispersion to appropriately increase the gap between the magnet 61 and the flap 3, and the magnetic force is further weakened, thereby appropriately reducing the dispersion pressure.

[0042] In an alternative embodiment, the magnet 61 may be an electromagnet with an electromagnetic coil, and the magnetic force regulating device may be a current regulating device of the electromagnetic coil. The magnitude of the magnetic force may be adjusted by adjusting the magnitude of the current, thereby changing the dispersion pressure. If the dry powder 5 to be dispersed is not completely dispersed or there is still residue of the dry powder 5 to be dispersed on the flap 3, the current may be appropriately increased before the next dispersion, thereby increasing the dispersion pressure appropriately. In addition, if it is found that the dry powder 5 to be dispersed is broken before being blown away by the gas ejected from the air guide channel due to excessive dispersion pressure, the current may be appropriately reduced before the next dispersion, thereby reducing the dispersion pressure appropriately.

[0043] In this embodiment, if Figures 2 to 4 As shown in FIG. 1 , the dry powder dispersing head 8 further has a cylindrical guide 2 attached to the lower surface of the body 1, and the guide 2 provides a flip chamber 4 for the flap 3 to flip therein without affecting the dry powder dispersion in the vacuum chamber 9. The guide 2 can be fixed to the lower surface of the body 1 by any appropriate means such as bonding or welding. When the flap 3 is opened, the dispersed dry powder is released through the flip chamber 4 under the guidance of the guide 2 and dispersed to the vacuum chamber 9. Figure 1 On the test sample plate 10 shown.

[0044] In addition, in the illustrated embodiment, the direction of the slideway 11 can be parallel to the axial direction of the flip chamber 4. Therefore, the piston 7 inserted into the slideway 11 can maximize the effect of gravity and the suction of negative pressure on it, and efficiently connect the air channel to achieve dry powder dispersion.

[0045] According to a specific embodiment, in order to ensure the conduction of the first air guiding channel 11 and the second air guiding channel 73 each time the piston 7 is inserted into the slide 11, the slide 11 and the piston 7 may respectively have marks (not shown) for circumferentially aligning the first air guiding channel 11 and the second air guiding channel 73. In this way, the marks on the piston 7 are circumferentially aligned with the marks on the slide 11 each time the piston 7 is inserted, so that the first air guiding channel 11 and the second air guiding channel 73 can be circumferentially aligned. Before inserting the piston 7, the marks of the first air guiding channel 11 and the second air guiding channel 73 are circumferentially aligned. When the piston 7 slides to the position where the limiting portion 71 abuts the body 1, as shown in FIG. Figure 4 As shown, it can be ensured that the first air guiding channel 11 and the second air guiding channel 73 are connected.

[0046] In an alternative embodiment, the air inlet portion of the second air guide channel 73 may be an annular groove that is open along the entire circumference of the outer side of the piston 7. One end of the annular groove leads downward to the second end of the piston 7 in a direction parallel to the axial direction of the slideway 11. Figure 3 or Figure 4 As shown, when the piston 7 is inserted into the slideway 11 from which direction, the first air guide channel 11 and the second air guide channel 73 can communicate with each other.

[0047] like Figure 4 As shown, the flap 3 can be suspended in the second position due to gravity. In this way, the piston 7 can be extended from the slide 11, and the flap 3 completely leaves the dry powder dispersion path, which is conducive to the full dispersion of dry powder particles. In this embodiment, when it is necessary to restore the magnetic attraction between the flap 3 and the magnet 61, the dry powder dispersion head 8 can be removed and the flap 3 can be restored to the original position by hand. Figure 2 The first position shown in the figure, or the dry powder dispersing head 8 is inverted, the flap 3 is turned over by gravity and is magnetically attracted by the magnet 61 again to restore to the original position. Figure 2 First position shown.

[0048] In an alternative embodiment, more than one flap 3 may be provided, for example, it may be provided as two or more flaps that open opposite each other. When provided as two or more flaps that open opposite each other, each flap may have a magnetic component, and a flap retaining device may be provided on the body 1 corresponding to each flap. According to different embodiments, each flap may correspond to a flap retaining device, or multiple or all flaps may correspond to a flap retaining device. With such a design, the dry powder 5 to be dispersed will be dispersed more evenly, rather than being dispersed only to one side.

[0049] In this embodiment, the extension 72 may be located at the periphery of the second end of the piston 7, and the end of the extension 72 may be a tip. There are two extensions 72, and the two extensions 72 are respectively located at the two ends of the diameter of the piston 7 parallel to the pivot axis of the flap 3. The two tips of the extension 72 push against the flap 3. Because when the dry powder 5 to be dispersed is placed on the flap 3 in the first position, as shown in FIG. Figure 2 As shown, it cannot be guaranteed that the powder will not be on both sides of the flap 3. In the embodiment where the protruding portion 72 is arranged in a ring shape, the dry powder to be dispersed that falls on the periphery is easily crushed by the annular protruding portion 72. After crushing, the dry powder may be crushed into slag, and the roundness value measured at this time may change. Therefore, through such a design, it is ensured that even if part of the dry powder is crushed, it is only a small part, which does not affect the measurement and analysis of the dry powder particles.

[0050] Based on the above description, combined with the attached Figure 1 , Figure 2 , Figure 3 and Figure 4 The dry powder dispersing head and the dry powder disperser including the same can be understood that each embodiment of the dry powder disperser including the dry powder dispersing head can achieve at least one of the following beneficial effects: automatic dispersion of fragile dry powder; simple and convenient operation; realization of adjustable pressure dispersion of dry powder; no need to install consumables such as films during dispersion; improved dispersion efficiency; and saved use costs.

[0051] The above exemplary embodiments of the dry powder dispersing head and the dry powder disperser including the same according to the present invention are described. Without departing from the scope and spirit of the described embodiments, those skilled in the art can make additions, subtractions or modifications to the embodiments and the features therein. All equivalent technical solutions should belong to the scope of the present invention and are considered to fall within the scope of the present invention.

[0052] Reference numerals list

[0053] 8 Vacuum Dispersing Head

[0054] 9 Vacuum Chamber

[0055] 91 Diffuser housing

[0056] 10 Test sample

[0057] 92 Negative pressure channel

[0058] 1 body

[0059] 11 Slide

[0060] 12. First air channel

[0061] 2 Guide

[0062] 3 Flip

[0063] 4. Flip cavity

[0064] 5 Dry powder to be dispersed

[0065] 6 Flap retaining device

[0066] 61 Magnet

[0067] 62 Adjustment screw

[0068] 7 Piston

[0069] 71 Limiting part

[0070] 72 Extension

[0071] 73 Second air guide channel.

Claims

1. A dry powder dispersing head, characterized in that: The dry powder dispersing head comprises: A body (1), the body (1) having a slideway (11) and a first air guide channel (12), the slideway (11) penetrating from the upper surface of the body (1) to the lower surface of the body (1), and the first air guide channel (12) communicating from the outside of the body (1) to the slideway (11); a flap (3), the flap (3) being mounted on the lower surface of the body (1) in a manner capable of pivoting between a first position and a second position, wherein in the first position the flap (3) closes the lower opening of the slideway (11), and in the second position the flap (3) opens the lower opening of the slideway (11); a flap retaining device (6), the flap (3) retaining device being mounted on the body (1), the flap retaining device being capable of retaining the flap (3) in the first position in a releasable manner by means of magnetic force; and A piston (7), wherein a limiting portion (71) is formed at a first end of the piston (7), the piston (7) is inserted in the slideway in an airtight manner in a slidable and removable manner, and a protruding portion (72) is formed at a second end of the piston (7), and a second air guide channel (73) is provided in the piston (7) from a side thereof to the second end, wherein: When the flap (3) is located at the first position, the protruding portion (72) defines a space for accommodating dry powder between the second end of the piston (7) and the flap (3), and When the flap (3) is located at the second position, the limiting portion (72) limits the position of the piston (7) by abutting against the body (1), and the second air guide channel (73) is in communication with the first air guide channel (12).

2. The dry powder dispersing head according to claim 1, wherein: The flap (3) is provided with a magnetic attraction component, and the flap holding device (6) is a magnet (61) with a magnetic force adjustment device.

3. The dry powder dispersing head according to claim 2, wherein: The magnetic force adjustment device is a screw (62) threaded into a through hole of the body (1), the through hole guides the end of the screw (62) toward the magnetic component, and the magnet (61) is attached to the end of the screw (62).

4. The dry powder dispersing head according to claim 2, wherein: The magnet (61) is an electromagnet having an electromagnetic coil, and the magnetic force regulating device is a current regulating device of the electromagnetic coil.

5. The dry powder dispersing head according to claim 1, wherein: The dry powder dispersing head (8) has a cylindrical guide (2) attached to the lower surface of the body (1), and the guide (2) provides a turning cavity (4) for the flap (3).

6. The dry powder dispersing head according to claim 5, wherein: The direction of the slideway (11) is parallel to the axial direction of the turnover chamber (4).

7. The dry powder dispersing head according to claim 1, wherein: The slideway (11) and the piston (7) respectively have markings for circumferentially aligning the first air guide channel (12) and the second air guide channel (73).

8. The dry powder dispersing head according to claim 1, wherein: The air inlet portion of the second air guide passage (73) is an annular groove that is open along the entire circumference of the outer side of the piston (7).

9. The dry powder dispersing head according to claim 1, wherein: In the second position, the flap (3) is suspended by gravity.

10. The dry powder dispersing head according to claim 1, wherein: The flap (3) comprises a plurality of flaps that are split into two.

11. The dry powder dispersing head according to claim 1, wherein: The protruding portion (72) is located at the periphery of the second end of the piston (7), and the distal end of the protruding portion (72) is a pointed tip.

12. The dry powder dispersing head according to claim 1, wherein: The number of the protruding portions (72) is two, and the two protruding portions (72) are respectively located at two ends of the diameter of the piston (7) parallel to the pivot axis of the flap (3).

13. A dry powder disperser, characterized in that: The dry powder disperser comprises a dry powder dispersing head as claimed in any one of claims 1 to 12.

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