An electromagnetic valve and a dry powder inhaler assisted inhalation device comprising the same

Abstract

The application discloses an electromagnetic valve and a dry powder inhaler auxiliary inhalation device containing the electromagnetic valve, and the electromagnetic valve comprises a valve shell, a valve core, a spring and an electromagnet which are arranged in the valve shell; the spring is arranged between the valve core and the electromagnet; the valve shell is a cavity with an open upper end and a closed lower end or a blocking structure for blocking the iron core. The electromagnetic valve provided by the application has the advantages of simple structure, small size, sealing when no power supply, opening when power supply, and opening when the air inlet needle is inflated. The application further provides the dry powder inhaler auxiliary inhalation device with the electromagnetic valve, which can supplement air flow for the dry powder inhaler, assist in drug inhalation, expand the use range of the dry powder inhaler, and can be used by people with bronchial diseases, children and the old.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical devices, and particularly relates to an electromagnetic valve and a dry powder inhaler auxiliary inhalation device containing the same. BACKGROUND

[0002] A dry powder inhaler (DPI) is one of the most commonly used pulmonary inhalation drug delivery devices on the market today. The dry powder inhaler contains solid micronized drugs or a mixture of micronized drugs and carriers. Under the action of the patient's respiratory airflow or the auxiliary action of a power source in the device, the micronized drug particles are aerosolized through airflow shearing, collision and drag separation from the carrier, and enter the target site in the lung along with the airflow.

[0003] Prior art patent CN118662736B discloses a low-residual inhalation drug delivery device, which is provided with an air inlet needle at the bottom to realize ventilation during inhalation. However, the structure design has high inhalation resistance. Generally, the airflow required for inhalation of a dry powder inhaler is about 30-60 liters per minute. Some patients with bronchial diseases, children and the elderly cannot form the required inhalation airflow, thus limiting the use of such devices in this population.

[0004] An electromagnetic valve is a commonly used fluid control actuator, and an electromagnet is the core structure thereof. A typical direct-acting normally closed electromagnetic valve is composed of a coil assembly, an armature, a valve seat, a spring and the like. When the coil is energized, a magnetic field is generated inside the electromagnetic valve, and the armature moves under the action of the electromagnetic force. After the power is turned off, the electromagnetic force disappears, and the armature is reset under the action of the spring force, thereby realizing the control of the on-off state. SUMMARY

[0005] In order to overcome the deficiencies of the prior art, the application provides an electromagnetic valve and a dry powder inhaler auxiliary inhalation device containing the same. The flexible control of inflation and deflation is realized, and auxiliary airflow is provided for the use of the dry powder inhaler.

[0006] As a first aspect of the application, an electromagnetic valve is provided, which comprises a valve housing and a valve core, a spring and an electromagnet arranged inside the valve housing, the spring being arranged between the valve core and the electromagnet; the valve housing is a cavity with an open upper end, and the space above the valve core inside the valve housing is an air passage for air inlet and air outlet;

[0007] The valve core comprises a circular truncated cone-shaped base and a protruding portion fixedly connected above the base; a slope with a shrinking inner diameter from bottom to top is arranged on the inner wall of the valve housing and matched with the side surface of the base, so that the slope can be attached to the base, the side surface of the slope and the base are in surface contact, and the sealing performance is improved.

[0008] A plurality of air holes are arranged on the side wall of the valve housing below the slope.

[0009] The first sealing ring is arranged inside the side wall of the valve housing top, and the second sealing ring is arranged outside the side wall, and both are made of elastic material, which can be silica gel or rubber.

[0010] Preferably, the convex part of the spool in the electromagnetic valve is one piece, or comprises a base and two lugs fixedly connected above the base. The two lugs are arranged at the edges of the top of the base.

[0011] As a second aspect of the present application, there is provided a dry powder inhaler auxiliary inhalation device comprising the electromagnetic valve.

[0012] Preferably, the dry powder inhaler auxiliary inhalation device comprises a gas supplement box and a telescopic air bag in the gas supplement box, the telescopic air bag is open at one end facing the electromagnetic valve and closed at the other end, the top end of the valve housing of the electromagnetic valve extends out of the top of the gas supplement box and the top of the telescopic air bag, the vent hole is located below the top cover of the gas supplement box and in the cavity of the telescopic air bag, and the top of the telescopic air bag is fixed to the inner wall of the top of the gas supplement box.

[0013] Further, the second sealing ring of the valve housing of the electromagnetic valve extends out of the top of the gas supplement box and the telescopic air bag for sealing connection.

[0014] The bottom of the telescopic air bag is fixedly connected to the inner wall of the bottom of the gas supplement box by a compression spring. Before the telescopic air bag is inflated, the compression spring is in an extended state.

[0015] The gas supplement box comprises an air bag compartment containing the telescopic air bag and a power supply compartment containing a battery, the power supply compartment is provided with a switch for controlling the opening and closing of the power supply of the electromagnetic valve, and the battery supplies power to the electromagnetic valve. When the switch of the power supply compartment is pressed, the power is turned on, and when it is not pressed, the power is automatically turned off.

[0016] The air bag compartment of the gas supplement box containing the telescopic air bag is provided with a transparent observation window and a pressure indication scale, and the telescopic air bag is provided with a pressure indication line, which is used to observe the internal condition of the cavity of the gas supplement box and indicate the pressure.

[0017] Preferably, the cross section of the telescopic air bag is circular or square.

[0018] The bottom of the gas supplement box is provided with a vent hole.

[0019] As a third aspect of the present application, there is provided a method for using the dry powder inhaler auxiliary inhalation device, based on the dry powder inhaler auxiliary inhalation device, comprising the following steps:

[0020] Step 1, insert the air inlet needle connected to the air source into the valve housing of the electromagnetic valve at the airway position, the air inlet needle compresses the lower spring through the spool along the airway, inflates the telescopic air bag, when the target pressure is reached, the pressure indication line points to the target pressure indication scale, at this time the inflation is completed, and the air inlet needle is pulled out;

[0021] Step 2: After the capsule of the dry powder inhaler is cut, the auxiliary inhalation device of the dry powder inhaler is connected to the lower part of the capsule chamber fixing cavity of the dry powder inhaler through the valve shell.

[0022] Step 3: The user inhales through the mouthpiece of the dry powder inhaler and simultaneously turns on the switch on the air replenishment box. The valve core moves downward under the action of the electromagnet, and the gas in the telescopic airbag is delivered into the dry powder inhaler through the solenoid valve under its own large air pressure and the compression of the spring, thus achieving the air replenishment effect.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. This invention provides a solenoid valve with a simple structure and small size, which can achieve sealing when not energized and opening when energized, thus realizing effective and flexible control of airflow inflation and deflation.

[0025] 2. The present invention provides an inhalation assistance device with the solenoid valve, which supplements the airflow of the dry powder inhaler, assists in drug inhalation, expands the range of users of the dry powder inhaler, and can also be used by people with bronchial diseases, children and the elderly.

[0026] 3. In the inhalation aid device with the solenoid valve provided by the present invention, the gas pre-filled by the telescopic airbag is stored. When it is needed, the solenoid valve is energized, and the valve opens. The compressed gas in the airbag enters the connected dry powder inhaler through the telescopic airbag and the solenoid valve under the pressure of the compression spring to realize the gas replenishment function.

[0027] 4. The suction assist device with the solenoid valve provided by the present invention is small in size and easy to carry.

[0028] 5. The suction assist device with the solenoid valve provided by the present invention is electrically activated and responds quickly. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0030] Figure 1 This is a schematic diagram of the overall structure of the solenoid valve provided in Embodiment 1 of the present invention;

[0031] Figure 2 This is a schematic diagram of the solenoid valve charging state provided in Embodiment 1 of the present invention;

[0032] Figure 3 This is a schematic diagram of the valve core structure in the solenoid valve provided in Embodiment 1 of the present invention; wherein, a is a valve core structure, and b is a valve core structure with a sealing layer;

[0033] Figure 4 The schematic diagram of the spool structure of the electromagnetic valve provided in embodiment 2 of the present application; wherein a is the spool with two protruding structures, and b is the spool with one protruding part;

[0034] Figure 5 The schematic diagram of the overall structure of the dry powder inhaler auxiliary inhalation device provided in embodiment 3 of the present application;

[0035] Figure 6 The schematic diagram of the structure of the inflatable and retractable air bag in the dry powder inhaler auxiliary inhalation device provided in embodiment 3 of the present application;

[0036] Figure 7 The schematic diagram of the structure of the retractable air bag in the dry powder inhaler auxiliary inhalation device provided in embodiment 3 of the present application; wherein a is the retractable air bag with a circular cross section, and b is the retractable air bag with a square cross section.

[0037] Figure 8 The schematic diagram of the bottom view angle of the dry powder inhaler auxiliary inhalation device provided in embodiment 3 of the present application.

[0038] Figure 9 The schematic diagram of the assembly of the dry powder inhaler auxiliary inhalation device and the dry powder inhaler provided in embodiment 3 of the present application.

[0039] Wherein, 101-valve housing, 102-spool, 103-spring, 104-electromagnet;

[0040] 1011-inclined surface, 1012-vent hole, 1013-first sealing ring, 1014-second sealing ring;

[0041] 1021-base, 1022-protruding part, 1023-protruding block, 1024-sealing layer;

[0042] 1041-iron core, 1042-electromagnetic coil;

[0043] 201-gas supplement box, 202-retractable air bag, 203-air bag compartment, 204-compression spring, 205-fixing plate, 206-switch, 207-transparent observation window, 208-pressure indication scale, 209-vent hole, 210-power supply compartment, 211-pressure indication line;

[0044] 2011-gas supplement box top cover, 2021-retractable air bag outer frame.

[0045] 301-air inlet needle, 302-airway;

[0046] 41-base body, 42-capsule compartment; 4102-capsule compartment fixing cavity; 4203-adjustable bottom groove, 4207-air inlet rod. DETAILED DESCRIPTION

[0047] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0048] It is also important to note that the terms "including", "comprising", and / or "having" as used herein are specifically intended to be open-ended and also to mean including, comprising, and / or having other components, in addition to the listed components. It is also important to note that the use of relational terms, if any, such as first, second, third, and / or the like, are used solely to distinguish one from another entity or action without necessarily implying an actual such relationship or order between such entities or actions.

[0049] Prior patent CN118662736B discloses a low residual inhalation administration device, the bottom is provided with an air inlet needle to realize ventilation during the inhalation process, in order to overcome the problem that the structure needs large suction force and the use of patients is limited, the present application provides an electromagnetic valve and a dry powder inhaler auxiliary inhalation device with the electromagnetic valve.

[0050] Example 1, an electromagnetic valve

[0051] As shown in Figure 1 and Figure 2 , including valve housing 101 and valve core 102, spring 103 and electromagnet 104 arranged inside valve housing 101, the electromagnet 104 includes core 1041 and its outer electromagnetic coil 1042; the spring 103 is arranged between the valve core 102 and the electromagnet 104; the valve housing 101 is an open cavity at the upper end, the lower end is closed or provided with a blocking structure to block the core 1041. The space inside the valve housing 101, the upper space of the valve core 102 is the airway 302 for air intake and air outlet. The valve core 102 is made of iron, nickel, cobalt, manganese or other magnetic metal materials.

[0052] The structure of the valve core 102 is as shown in Figure 3 As shown in Figure 3 , including the base 1021 of the circular truncated cone shape, the convex part 1022 fixedly connected above the base 1021, the inner wall of the valve housing 101 is provided with a slope 1011 with a shrinking inner diameter from bottom to top, the slope 1011 has the same angle with the base circular truncated cone structure, the slope 1011 is in close contact with the base 1021 circular truncated cone, which is a surface contact, improving the sealing performance.

[0053] The convex part 1022 and the base 1021 are integrally formed or fixedly connected.

[0054] As a further improvement of the structure, as shown in Figure 3As shown in Figure b, a sealing layer 1024 is provided on the outer side of the valve core 102 base 1021. The sealing layer 1024 is made of elastic materials such as silicone and rubber, and can be fixed to the base 1021 by means of bonding, etc., to further improve the sealing effect.

[0055] Several vent holes 1012 are provided on the valve housing 101 on the side wall below the inclined surface 1011.

[0056] The valve housing 101 has a first sealing ring 1013 inside the side wall at the top and a second sealing ring 1014 outside the side wall, both made of elastic material. In this embodiment of the invention, the elastic material can be silicone, rubber, or other materials.

[0057] The valve housing 101 is made of a hard material, which can be hard plastic or metal.

[0058] Example 2,

[0059] As a modification to the structure of Embodiment 1, the valve core 102 structure of the solenoid valve is as follows: Figure 4 As shown.

[0060] As one implementation method, such as Figure 4 As shown in Figure a, the device includes a base 1021 and two protrusions 1023 fixedly connected to the top of the base 1021. The two protrusions 1023 are symmetrically arranged on the top edge of the base 1021. In use, the two protrusions 1023 contact the bottom end of the air intake needle 301, and the gap between the two protrusions 1023 and the air intake needle 301 forms a gas channel.

[0061] As another implementation method, such as Figure 4 As shown in Figure b, the device includes a base 1021 and a protrusion 1022 fixedly connected above the base 1021. In this embodiment, the protrusion 1022 is a cuboid. When in use, the air intake needle 301 partially contacts the cuboid-shaped protrusion 1022, and gas channels are formed on both sides of the protrusion 1022.

[0062] Example 3: A dry powder inhaler auxiliary inhalation device including the solenoid valve described in Example 1.

[0063] like Figure 5 and Figure 7 As shown, the device includes an air supply box 201 and a telescopic air bladder 202 located within the air supply box 201. The telescopic air bladder 202 is made of elastic material, with one end open facing the solenoid valve and the other end closed. The top of the solenoid valve housing 101 provided in Embodiment 1 extends from the top of the air supply box 201, and the vent 1012 is located inside the cavity of the telescopic air bladder 202.

[0064] The air supplement box 201 includes a cavity containing the telescopic air bag 202, and a power supply compartment 210 containing a battery, and the power supply compartment 210 is provided with a switch 206 to control the opening and closing of the power supply, and the battery supplies power to the electromagnetic valve. When the power supply compartment switch 206 is pressed, the power is turned on, and when it is not pressed, it is automatically disconnected. When the power is turned on, the valve core 102 drops, and the gas in the telescopic air bag 202 enters the dry powder inhaler connected thereto through the air hole 1012 to achieve the air supplement effect.

[0065] The air supplement box 201 includes a box body and an air supplement box top cover 2011 located at the top of the box body. The air supplement box top cover 2011 can be integrally formed with the air supplement box, or can be a plate-shaped structure and be separately installed. In one embodiment, the air supplement box top cover 2011 can be located at the top of the air bag compartment 203. In another embodiment, the air supplement box top cover 2011 can cover the top of the air bag compartment 203 and the power supply compartment 210.

[0066] The telescopic air bag outer frame 2021 at the top of the telescopic air bag 202 is fixed on the four edges of the inner wall of the air supplement box top cover 2011 by bonding or screws, and is sealed around the telescopic air bag outer frame 2021.

[0067] As shown in Figure 6 The bottom of the telescopic air bag 202 is fixedly connected to the inner wall of the bottom of the air supplement box 201 through a compression spring 204 and a fixed plate 205. In another embodiment, the bottom of the telescopic air bag 202 is directly fixedly connected to the inner wall of the bottom of the air supplement box 201 through a compression spring. Before the telescopic air bag is inflated, the compression spring 204 is in an extended state.

[0068] The part of the air supplement box 201 containing the telescopic air bag 202 is provided with a transparent observation window 207 and a pressure indication scale 208, which are used to observe the internal condition of the cavity of the air supplement box 201 and indicate the pressure.

[0069] The bag body of the telescopic air bag 202 is provided with a pressure indication line 211. As shown in Figure 5 In this embodiment, the pressure indication line 211 is a red line. The position of the red pressure indication line 211 is observed through the transparent observation window 207, so that the inflation condition of the telescopic air bag can be generally understood. Further, during assembly, the pressure value in the telescopic air bag when the red pressure indication line 211 is at different positions is detected by a pressure detection device and marked on the pressure indication scale 208, so that the pressure condition in the telescopic air bag 202 can be understood during use. The pressure of the compressed air in the telescopic air bag can be conveniently adjusted by inflation or deflation according to the needs of the user, so as to supplement different sizes of air flow.

[0070] As shown in Figure 7As shown, the cross-section of the telescopic airbag 202 can be circular or square. When the cross-section is square, it is slightly smaller than the internal dimensions of the air replenishment box, allowing it to extend and retract freely, reducing or avoiding friction between the airbag and the air replenishment box wall during inflation and deflation. Due to the limitations of the air replenishment box, a square cross-section can accommodate more compressed air.

[0071] After the airbag is inflated, it can only expand and contract along a vertical square, not along a horizontal square, so there will be no friction between it and the wall of the air replenishment box after inflation.

[0072] like Figure 8 As shown, an exhaust port 209 can be provided at the bottom of the airbag compartment of the air replenishment box 201 to keep the inside of the air replenishment box connected to the atmosphere and avoid interference from the pressure in the air replenishment box when the telescopic airbag is extended or retracted.

[0073] This structure is designed to be compatible with "a low-residue inhalation drug delivery device" provided in patent CN118662736B, such as Figure 9 As shown, the base of the device includes a base body 41 and a capsule chamber fixing cavity 4102 and a capsule chamber 42 disposed on the base body. The capsule chamber 42 also includes a capsule chamber body 4202 and an adjustable bottom groove 4203. An air inlet needle is disposed at the bottom of the adjustable bottom groove 4203. The air inlet needle includes an upper air outlet portion and an air inlet rod 4207 connected to the lower part of the air outlet portion. It is understood that the inner or outer diameter of the valve housing of the solenoid valve provided by the present invention needs to be adapted to the lower part of the capsule chamber fixing cavity 4102 of the inflated air inlet needle or the dry powder inhaler (low residual inhalation drug delivery device). Therefore, during inflation, the air inlet needle can be fitted inside the solenoid valve air passage to achieve a sealed connection through the first sealing ring. In use, as Figure 9 As shown, the valve housing 101 can be fitted inside the lower part of the capsule chamber fixing cavity 4102 of the dry powder inhaler, and a sealed connection is achieved through the second sealing ring 1014.

[0074] The working principle is explained as follows:

[0075] 1. For example Figure 2 As shown, first insert the air inlet needle 301 of the air pump into the valve housing 101 of the solenoid valve. The operator pushes the air inlet needle 301 to compress the lower spring 103 through the valve core 102, and then inflates the telescopic airbag 202. Gas is injected into the telescopic airbag through the vent 1012, as shown. Figure 6 As shown, the telescopic airbag expands downwards, expelling excess air from the air supply box through the exhaust port at the bottom. Once the target pressure is reached (the pressure indicator line points to the target pressure mark), the air intake needle is withdrawn. The valve core moves upwards under the action of the spring, blocking the air passage 302. At this time, the telescopic airbag 202 is in the extended state, and the compression spring 204 is in the compressed state.

[0076] 2. Put the capsule into the dry powder inhaler according to the method described in the

[63] paragraph of patent CN118662736B, and complete the cutting. Note that do not inhale through the mouthpiece at this time.

[0077] 3. The outer diameter of the vent valve is slightly smaller than the inner diameter of the capsule compartment fixing cavity 4102 at the bottom of the dry powder inhaler, and the outer side of the vent valve is provided with a second sealing ring 1014, the outer diameter of which is slightly larger than the inner diameter of the capsule compartment fixing cavity 4102. After aligning the lower part of the capsule compartment fixing cavity 4102 of the dry powder inhaler with the vent valve, press the dry powder inhaler downward, and the second sealing ring provided on the vent valve makes the two seal and connect.

[0078] 4. Press the air supplement box switch 206 at the same time or slightly delayed while the user inhales through the mouthpiece, the circuit is connected, the valve core 102 moves downward under the action of the electromagnet, the airway 302 is opened, the compression spring 204 compresses the expansion air bag 202 to make the compressed air in the expansion air bag pass through the air inlet rod through the electromagnetic valve to form the required air flow, thereby assisting the user to complete the inhalation of dry powder medicine, and realizing the air supplement effect.

[0079] 5. After use, turn off the switch 206 on the air supplement box, and separate the dry powder inhaler from the dry powder inhalation aid device of the application; before next use, if necessary, the dry powder inhalation aid device can be recharged according to step 1.

[0080] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dry powder inhaler assisted inhalation device, characterized by, The electromagnetic valve, the air supplement box and the telescopic air bag in the air supplement box are included. The electromagnetic valve includes a valve shell, a valve core, a spring and an electromagnet arranged in the valve shell, and the spring is arranged between the valve core and the electromagnet; the valve shell is a cavity with an open upper end, and a space above the valve core in the valve shell is a gas passage for air inlet and outlet; the valve core includes a circular truncated cone-shaped base and a protruding part fixedly connected above the base, and an inclined surface with a decreasing inner diameter from bottom to top is arranged on the inner wall of the valve shell and matched with the side surface of the base. The telescopic air bag is open at one end facing the electromagnetic valve and closed at the other end; the top end of the valve shell of the electromagnetic valve is provided with a second sealing ring part extending from the top of the air supplement box and the telescopic air bag, and a vent hole is arranged below the top cover of the air supplement box and in the cavity of the telescopic air bag; the top of the telescopic air bag is fixed to the inner wall of the top of the air supplement box. A plurality of vent holes are arranged on the side wall below the inclined surface of the valve shell.

2. A dry powder inhaler assisted inhalation device according to claim 1, wherein, A first sealing ring is arranged in the inner wall of the side wall of the top of the valve shell, and a second sealing ring is arranged outside the side wall.

3. A dry powder inhaler assisted inhalation device according to claim 1, wherein, The protruding part is one piece or two protruding blocks fixedly connected above the base, and the two protruding blocks are arranged at the edges of the top of the base.

4. A dry powder inhaler assisted inhalation device according to claim 1, wherein, The bottom of the telescopic air bag is fixedly connected to the inner wall of the bottom of the air supplement box through a compression spring, and the compression spring is in an extended state before the telescopic air bag is inflated.

5. A dry powder inhaler assisted inhalation device according to claim 1, wherein, The air supplement box includes an air bag compartment containing the telescopic air bag and a power supply compartment containing a battery, and the power supply compartment is provided with a switch to control the opening and closing of the power supply, and the battery supplies power to the electromagnetic valve.

6. A dry powder inhaler assisted inhalation device according to claim 1, wherein, The air bag compartment of the air supplement box containing the telescopic air bag is provided with a transparent observation window and a pressure indication scale, and the telescopic air bag is provided with a pressure indication line.

7. A dry powder inhaler assisted inhalation device according to claim 1, wherein, The cross section of the telescopic air bag is circular or square.

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