A high-pressure, low-noise diaphragm air pump

Abstract

This utility model belongs to the field of diaphragm air pumps, specifically relating to a high-pressure, low-noise diaphragm air pump, comprising a pressurization chamber, a one-way base, a piston fixing seat, and a base connected in sequence; a piston is fixed on the piston fixing seat, and the piston has a bladder with a variable cavity; the one-way base has an air outlet corresponding to the bladder, and is equipped with an air outlet one-way valve for controlling the one-way opening and closing of the air outlet; the pressurization chamber is connected to the one-way base, forming an air outlet chamber between them, the air outlet chamber having an air outlet buffer chamber connected to the air outlet and an air outlet flow chamber connected to the air outlet buffer chamber, the pressurization chamber having an air outlet connected to the air outlet flow chamber, and the width of the air outlet buffer chamber being greater than the width of the air outlet flow chamber. This utility model uses a wider air outlet buffer chamber and a narrower, linear air outlet flow chamber to form the air outlet chamber, creating a contracting design from large to small, thus reducing noise.

Description

Technical Field

[0001] This utility model belongs to the field of diaphragm air pumps, specifically relating to a high-pressure, low-noise diaphragm air pump. Background Technology

[0002] Air pumps, as an indispensable product in pressurization devices, are used in a wide range of industries and play a crucial role. Conventional air pumps have low output pressure, with a maximum pressure between 60 and 120 kPa, or high output pressure but short lifespan, which cannot meet the needs of applications with large pressure loads. For example, the maximum working pressure of the air pump for gas water heaters is required to be greater than 150 kPa. Under such high pressure load conditions, the pump must meet the requirements of a long lifespan and low noise. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a high-pressure, low-noise diaphragm air pump.

[0004] The technical solution adopted by this utility model is as follows: a high-pressure, low-noise diaphragm air pump, comprising a pressurization chamber, a one-way base, a piston fixing seat, and a base connected in sequence;

[0005] A piston is fixed on the piston mounting seat, and the piston is provided with a bladder with a variable cavity.

[0006] The one-way base is provided with an air outlet hole corresponding to the bladder body, and is equipped with an air outlet one-way valve to control the one-way opening and closing of the air outlet hole.

[0007] The pressurization chamber is connected to the one-way base, and an air outlet chamber is formed between the two. The air outlet chamber has an air outlet buffer chamber connected to the air outlet through hole and an air outlet flow chamber connected to the air outlet buffer chamber. The pressurization chamber is provided with an air outlet connected to the air outlet flow chamber. The width of the air outlet buffer chamber is greater than the width of the air outlet flow chamber.

[0008] The piston is provided with several bladders, and the one-way base is provided with several one-way valve seats corresponding to the number and position of the bladders. The one-way valve seat is provided with an air outlet hole. The one-way valve for air outlet cooperates with the one-way valve seat to control the one-way opening and closing of the air outlet hole. The air outlet chamber has an air outlet buffer chamber corresponding to the number and position of the one-way valve seats. The air outlet flow chamber is connected between the air outlet buffer chambers.

[0009] The number of exhaust flow chambers corresponds to the number of exhaust buffer chambers. The exhaust flow chambers are linear. Several exhaust flow chambers form a confluence point at the center between several exhaust buffer chambers. The exhaust port is located at the confluence point.

[0010] The pressurization chamber protrudes towards the one-way base to form a closed annular first partition ring. The end of the first partition ring abuts against the surface of the one-way base, so that an air outlet chamber is formed within the first partition ring between the pressurization chamber and the one-way base.

[0011] The upper surface of the unidirectional base is provided with a first annular groove that is adapted to the first spacer ring. The end face of the first spacer ring and the bottom surface of the first groove are in a sealing fit.

[0012] The bladder extends into the cavity formed between the piston fixing seat and the bottom shell and divides the cavity between the piston fixing seat and the bottom shell into an outer piston cavity and an inner piston cavity. The outer piston cavity is connected to an air inlet, and the outer piston cavity and the inner piston cavity are connected by a one-way air intake channel equipped with a one-way air intake valve.

[0013] The piston includes several bladders and a fixing plate connecting the bladders into one piece. The fixing plate is positioned between the piston fixing seat and the one-way base. The piston fixing seat has mating holes corresponding to the number and position of the bladders for the bladders to pass through, and a fourth air inlet hole located near the mating holes. The piston has a fifth air outlet hole with a larger diameter than the fourth air inlet hole, and an air inlet one-way valve corresponding to the fourth air inlet hole is provided in the fifth air outlet hole. A groove is provided at the connection between the fifth air outlet hole and the bladder.

[0014] The intake one-way valve is an intake one-way diaphragm with one edge fixedly connected to the inner wall of the fifth exhaust port. The thickness of the intake one-way diaphragm is less than the thickness of the fifth exhaust port.

[0015] The intake check valve and piston are integrally formed from an elastic material.

[0016] The pressurization chamber protrudes towards the one-way base to form a first and second partition ring, both of which are closed annular rings. The first partition ring is located within the area enclosed by the second partition ring. The ends of the first and second partition rings abut against the surface of the one-way base, dividing the chamber between the pressurization chamber and the one-way base into an air inlet chamber between the first and second partition rings and an air outlet chamber within the first partition ring. The pressurization chamber has an air inlet located in the area between the first and second partition rings and an air outlet located in the area corresponding to the area within the first partition ring. The one-way base has a first air inlet hole corresponding to the air outlet chamber. The piston has a second air inlet hole corresponding to the first air inlet hole. The piston fixing seat has a third air inlet hole corresponding to the second air inlet hole. The first, second, and third air inlet holes are sequentially connected to form a continuously connected air inlet channel that keeps the air inlet chamber connected to the piston outer cavity.

[0017] This invention employs a wider outlet buffer chamber and a narrower, linear outlet flow chamber in the diaphragm air pump to form an outlet cavity, creating a contraction design where the outlet cavity shrinks from large to small, thus reducing noise. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0019] Figure 1 This is an exploded view of one embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of one embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the piston structure in one embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the pressurization chamber in one embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a unidirectional base in one embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the piston fixing seat in one embodiment of the present invention;

[0025] Figure 7 for Figure 3 An enlarged schematic diagram of part A in the middle;

[0026] Figure 8 This is an exploded view of the pressurized one-way sealing structure in one embodiment of the present invention;

[0027] In the diagram, the components are: self-tapping screw-1, pressurization chamber-2, air inlet-201, air outlet-202, first spacer ring-203, second spacer ring-204, air outlet buffer groove-205, air outlet flow groove-206, air outlet check valve-3, one-way base-4, first partition groove-401, second partition groove-402, one-way valve fixing hole-403, air outlet through hole-404, first air inlet through hole-405, boss-406, piston-5, bladder-501, and fixing plate. -502, Pull foot -503, First sealing strip -504, Fifth air outlet -505, One-way air inlet diaphragm -506, Groove -507, Stop block -508, Second air inlet -509, Second sealing strip -5010, Piston fixing seat -6, Mating hole -601, Third air inlet -602, Fourth air inlet -603, Turntable -7, Bearing -8, Eccentric wheel -9, Machine thread screw -10, Bottom shell -11, Motor -12;

[0028] Intake chamber - A, outer piston chamber - B, inner piston chamber - C, exhaust chamber - D. Detailed Implementation

[0029] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0030] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0031] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0032] A high-pressure, low-noise diaphragm air pump, such as Figure 1 , Figure 2 As shown, it includes a self-tapping screw 1, a pressure chamber 2, an exhaust one-way valve 3, a one-way base 4, a piston 5, a piston fixing seat 6, a turntable 7, a bearing 8, an eccentric wheel 9, a machine thread screw 10, a bottom shell 11, and a motor 12.

[0033] The pressurization chamber 2, one-way base 4, piston fixing seat 6, and bottom shell 11 are connected sequentially by self-tapping screws 1. The pressurization chamber 2 is provided with an air inlet 201 and an air outlet 202. A partition ring structure is provided between the pressurization chamber 2 and the one-way base 4. The partition ring structure divides the chamber between the pressurization chamber 2 and the one-way base 4 into an air inlet chamber A and an air outlet chamber D. The air inlet 201 and the air outlet 202 are respectively connected to the air inlet chamber A and the air outlet chamber D. Figure 3 As shown, the piston 5 includes several bladders 501 and a fixing plate 502 that connects the several bladders 501 into one piece. The bottom of the bladder 501 is provided with a pull foot 503. The fixing plate 502 is limited between the piston fixing seat 6 and the one-way base 4. The bladder 501 passes through the piston fixing seat 6 and extends into the cavity formed between the piston fixing seat 6 and the bottom shell 11, and divides the cavity formed between the piston fixing seat 6 and the bottom shell 11 into the piston outer cavity B and the piston inner cavity C. The motor 12 is connected to the outer end of the bottom shell 11 by a machine screw 10, and its drive shaft passes through the bottom shell 11 and extends into the center hole of the eccentric wheel 9 to form a circumferential linkage with the eccentric wheel 9. The eccentric wheel 9 is eccentrically set relative to the center hole and the inclined drive shaft is engaged with the turntable 7 through a bearing 8. The pull foot 503 at the bottom of the bladder 501 is fixedly connected to the turntable 7. The upper surface of the fixing plate 502 is provided with a raised first sealing strip 504, which abuts against the bottom surface of the one-way base 4 to seal and isolate the inner cavities C of adjacent pistons.

[0034] like Figure 4 As shown, the pressurization chamber 2 protrudes towards the one-way base 4 to form a first partition ring 203 and a second partition ring 204, both of which are closed annular rings. The first partition ring 203 is located within the area enclosed by the second partition ring 204. The ends of the first partition ring 203 and the second partition ring 204 abut against the surface of the one-way base 4, thereby dividing the chamber between the pressurization chamber 2 and the one-way base 4 into an air inlet chamber A between the first partition ring 203 and the second partition ring 204 and an air outlet chamber D within the first partition ring 203. The air inlet 201 is set in the area between the first partition ring 203 and the second partition ring 204, and the air outlet 202 is set in the area within the first partition ring 203.

[0035] like Figure 5As shown, the upper surface of the one-way base 4 is provided with a first annular groove 401 and a second groove 402 that are respectively adapted to the first spacer ring 203 and the second spacer ring 204. The end faces of the first spacer ring 203 and the second spacer ring 204 are respectively in abutting and sealing fit with the bottom surfaces of the first groove 401 and the second groove 402. The one-way base 4 is provided with a plurality of one-way valve seats 402 in the groove 401. The number and position of the one-way valve seats 402 correspond to the bladder body 501. The one-way valve seats 402 are provided with one-way valve fixing holes 403 and air outlet holes 404 located on the outer periphery of the one-way valve fixing holes 403. The air outlet one-way valve 3 is an umbrella-shaped valve plate, the umbrella foot of which is fixed in the one-way valve fixing hole 403 and its umbrella-shaped sealing surface is fitted with the air outlet hole 404. The one-way base 4 is provided with a first air inlet hole 405 outside the groove 401.

[0036] like Figure 6 As shown, the piston fixing seat 6 is provided with mating holes 601 corresponding to the number and position of the bladder 501 for the bladder 501 to pass through, third air inlets 602 corresponding to the number and position of the first air inlets 405, and a fourth air inlet 603 located near the mating holes 601, as shown. Figure 7 As shown, the piston 5 has a fifth exhaust port 505 with a larger diameter than the fourth exhaust port 603, and an intake one-way valve corresponding to the fourth exhaust port 603 is provided in the fifth exhaust port 505. Specifically, the intake one-way valve is an intake one-way diaphragm 506 with one edge fixedly connected to the inner wall of the fifth exhaust port 505. The thickness of the intake one-way diaphragm 506 is less than the thickness of the fifth exhaust port 505, allowing it to swing up and down in the fifth exhaust port 505 to block or open the fourth exhaust port 603. A groove 507 is provided at the connection between the fifth exhaust port 505 and the bladder 501, so that an air passage is formed between the piston 5 and the one-way base 4, connecting the fifth exhaust port 505 and the piston cavity C. Specifically, as shown... Figure 3 , Figure 7As shown, the number of fifth vent holes 505 corresponds to the number of bladder bodies 501. Each fifth vent hole 505 is located in the middle area formed by several bladder bodies 501. The first sealing strip 504 surrounds the bladder bodies 501, grooves 507, and fifth vent holes 505 that form a connection, so that each piston inner cavity C is isolated from each other. It is unidirectionally connected to the piston outer cavity B through the fifth vent hole 505 and unidirectionally connected to the vent cavity D through the vent hole 404. Meanwhile, the piston 5 is provided with a second air inlet 509 corresponding to the first air inlet 405. The first air inlet 405, the second air inlet 509, and the third air inlet 602 are connected in sequence to form a continuously connected air inlet channel that keeps the air inlet chamber A connected to the piston outer chamber B. The fourth air inlet 603, the fifth air outlet 505, and the air passage form a one-way connected air inlet channel from the piston outer chamber B to the piston inner chamber C under the action of the one-way diaphragm 506. The air outlet 404 forms a one-way connected air outlet channel from the piston inner chamber C to the air outlet chamber D under the action of the one-way valve 3.

[0037] Furthermore, such as Figure 7 As shown, the side of the one-way diaphragm 506 connected to the inner wall of the fifth air outlet 505 is located near the side of the bladder 501. A stop block 508 is provided in the middle of the groove 507, and the upper end face of the stop block 508 abuts against the lower end face of the one-way base 4.

[0038] Furthermore, the intake unidirectional diaphragm 506 and the piston 5 are integrally formed from an elastic material, resulting in a simplified structure and convenient assembly.

[0039] Furthermore, the upper surface of the fixing piece 502 is provided with a second sealing strip 5010, the two ends of the second sealing strip 5010 are connected to the first sealing strip 504, and the second air inlet hole 509 is located outside the area enclosed by the first sealing strip 504 and within the area enclosed by the second sealing strip 5010 and the first sealing strip 504.

[0040] Furthermore, such as Figure 4 As shown, the area enclosed by the first partition ring 203 is provided with a plurality of air outlet buffer grooves 205 corresponding to the position of the air outlet one-way valve 3, and an air outlet flow groove 206 connected between the plurality of air outlet buffer grooves 205. The air outlet flow groove 206 is a straight groove. The air outlet flow groove 206 forms a confluence point between the plurality of air outlet buffer grooves 205. The air outlet 202 is set at the confluence point. The width of the air outlet flow groove 206 is smaller than the width of the air outlet buffer groove 205, so that the air outlet chamber forms an air outlet buffer chamber with a larger width and a straight air outlet flow chamber with a smaller width, realizing a shrinking design of the air outlet chamber from large to small, reducing noise.

[0041] like Figure 5As shown, a boss 406 is provided on the upper surface of the one-way base 4 at a position corresponding to the air outlet buffer groove 205. The one-way valve seat 402 is located on the upper surface of the boss 406. The boss 406 extends into the air outlet buffer groove 205 and is a certain distance away from the ground of the air outlet buffer groove 205, providing sufficient space for the one-way valve 3 to move.

[0042] Specifically, in this embodiment, the piston 5 has four bladders 501 that are evenly spaced at the four corners, the air outlet groove 206 has a cross-shaped structure, and the first air inlet holes 405 have four holes that are distributed in the middle of adjacent protrusions 406.

[0043] The working principle of this embodiment is as follows: Under normal conditions, the air inlet 201, air inlet chamber A, and piston outer chamber B remain continuously connected. The one-way diaphragm 506 blocks the fourth air inlet hole 603, and the one-way valve 3 blocks the air outlet hole 404. The motor 12 drives the eccentric wheel 9 to swing, causing the four bladders 501 of the piston 5 to alternately expand and contract continuously. When the bladder 501 expands, the air pressure in the piston inner chamber C decreases, making it less than the pressure in the piston outer chamber B and less than the pressure in the air outlet chamber D. When the pressure is applied, the one-way diaphragm 506 actuates, exposing the fourth air inlet 603. Gas from the piston outer cavity B enters the piston inner cavity C. The one-way valve 3 remains blocked from the outlet 404. When the bladder 501 contracts, the air pressure in the piston inner cavity C increases, making it greater than the pressure in the piston outer cavity B and less than the pressure in the outlet cavity D. The one-way diaphragm 506 blocks the fourth air inlet 603, and the one-way valve 3 actuates, opening the outlet 404. Gas from the piston inner cavity C enters the outlet cavity D and is discharged through the outlet 202.

[0044] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A large pressure low noise diaphragm air pump characterized by, It includes a pressurization chamber, a one-way base, a piston fixing seat, and a base connected in sequence; A piston is fixed on the piston mounting seat, and the piston is provided with a bladder with a variable cavity. The one-way base is provided with an air outlet hole corresponding to the bladder body, and is equipped with an air outlet one-way valve to control the one-way opening and closing of the air outlet hole. The pressurization chamber is connected to the one-way base, and an air outlet chamber is formed between the two. The air outlet chamber has an air outlet buffer chamber connected to the air outlet through hole and an air outlet flow chamber connected to the air outlet buffer chamber. The pressurization chamber is provided with an air outlet connected to the air outlet flow chamber. The width of the air outlet buffer chamber is greater than the width of the air outlet flow chamber.

2. The high-pressure, low-noise diaphragm air pump according to claim 1, characterized in that: The piston is provided with several bladders, and the one-way base is provided with several one-way valve seats corresponding to the number and position of the bladders. The one-way valve seat is provided with an air outlet hole. The one-way valve for air outlet cooperates with the one-way valve seat to control the one-way opening and closing of the air outlet hole. The air outlet chamber has an air outlet buffer chamber corresponding to the number and position of the one-way valve seats. The air outlet flow chamber is connected between the air outlet buffer chambers.

3. The high-pressure, low-noise diaphragm air pump according to claim 2, characterized in that: The number of exhaust flow chambers corresponds to the number of exhaust buffer chambers. The exhaust flow chambers are linear. Several exhaust flow chambers form a confluence point at the center between several exhaust buffer chambers. The exhaust port is located at the confluence point.

4. The high-pressure, low-noise diaphragm air pump according to any one of claims 1-3, characterized in that: The pressurization chamber protrudes towards the one-way base to form a closed annular first partition ring. The end of the first partition ring abuts against the surface of the one-way base, so that an air outlet chamber is formed within the first partition ring between the pressurization chamber and the one-way base.

5. The high-pressure, low-noise diaphragm air pump according to claim 4, characterized in that: The upper surface of the unidirectional base is provided with a first annular groove that is adapted to the first spacer ring. The end face of the first spacer ring and the bottom surface of the first groove are in a sealing fit.

6. The high-pressure, low-noise diaphragm air pump according to any one of claims 1-3, characterized in that: The bladder extends into the cavity formed between the piston fixing seat and the bottom shell and divides the cavity between the piston fixing seat and the bottom shell into an outer piston cavity and an inner piston cavity. The outer piston cavity is connected to an air inlet, and the outer piston cavity and the inner piston cavity are connected by a one-way air intake channel equipped with a one-way air intake valve.

7. The high-pressure, low-noise diaphragm air pump according to claim 6, characterized in that: The piston includes several bladders and a fixing plate connecting the bladders into one piece. The fixing plate is positioned between the piston fixing seat and the one-way base. The piston fixing seat has mating holes corresponding to the number and position of the bladders for the bladders to pass through, and a fourth air inlet hole located near the mating holes. The piston has a fifth air outlet hole with a larger diameter than the fourth air inlet hole, and an air inlet one-way valve corresponding to the fourth air inlet hole is provided in the fifth air outlet hole. A groove is provided at the connection between the fifth air outlet hole and the bladder.

8. The high-pressure, low-noise diaphragm air pump according to claim 7, characterized in that: The intake one-way valve is an intake one-way diaphragm with one edge fixedly connected to the inner wall of the fifth exhaust port. The thickness of the intake one-way diaphragm is less than the thickness of the fifth exhaust port.

9. The high-pressure, low-noise diaphragm air pump according to claim 8, characterized in that: The intake check valve and piston are integrally formed from an elastic material.

10. The high-pressure, low-noise diaphragm air pump according to claim 6, characterized in that: The pressurization chamber protrudes towards the one-way base to form a first and second partition ring, both of which are closed annular rings. The first partition ring is located within the area enclosed by the second partition ring. The ends of the first and second partition rings abut against the surface of the one-way base, dividing the chamber between the pressurization chamber and the one-way base into an air inlet chamber between the first and second partition rings and an air outlet chamber within the first partition ring. The pressurization chamber has an air inlet located in the area between the first and second partition rings and an air outlet located in the area corresponding to the area within the first partition ring. The one-way base has a first air inlet hole corresponding to the air outlet chamber. The piston has a second air inlet hole corresponding to the first air inlet hole. The piston fixing seat has a third air inlet hole corresponding to the second air inlet hole. The first, second, and third air inlet holes are sequentially connected to form a continuously connected air inlet channel that keeps the air inlet chamber connected to the piston outer cavity.

Images