Constant pressure air pump

Abstract

The utility model discloses a constant pressure air pump. Including casing, pump core device, drive assembly, air inlet channel, air outlet nozzle. Pump core device is located in the casing, and drive assembly is located on the casing and is driven to be connected with pump core device, and air inlet channel, air outlet nozzle all are located on the casing, and air inlet channel, air outlet nozzle are communicated dynamically through pump core device, and constant pressure device includes constant pressure cover, spring, plug, and in this constant pressure air pump, drive assembly drives pump core device to work, and the cavity in the casing forms volume difference, and gas is input from air inlet channel and is output from air outlet nozzle. Use the plug and spring to form pressure relief module, and pressure is stable and can be adjusted. The spring force makes the pressure relief pressure gentle and does not produce larger airflow noise. The constant pressure air pump has good protectivity to application terminal, and the safety performance is improved, and it avoids the overpressure of the inflation container.

Description

Technical Field

[0001] This utility model relates to the field of pump equipment, specifically to a constant pressure air pump. Background Technology

[0002] Air pumps are widely used in various industries for purposes such as evacuation, inflation, vacuuming, pressurization, and gas circulation. However, air pump assembly is relatively complex and costly. Miniature air pumps, with their advantages of simple structure, small size, light weight, and low energy consumption, are widely used in the field of medical device technology. Miniature air pumps are also closely related to human living environments.

[0003] Existing air pumps lack a pressure relief / constant pressure structure, which may lead to excessive inflation pressure in the air bag during operation, shortening its lifespan. Alternatively, some pressure relief structures use resistance created by foam buildup, resulting in excessive airflow noise during pressure relief, affecting the user experience. Utility Model Content

[0004] According to one aspect of the present invention, a constant pressure air pump is provided, comprising: The casing is fixed in place. The pump core assembly is located inside the housing; A drive assembly, mounted on the housing and driven by the pump core assembly, is configured to provide driving force to the pump valve assembly. The air intake channel and air outlet are both located on the housing. A constant pressure device is installed on the housing, and the housing is provided with a pressure relief hole. The constant pressure device is connected to the inside of the housing through the pressure relief hole. The constant pressure device includes a constant pressure cover, a spring, and a plug. The constant pressure cover is placed over the pressure relief hole. The plug is fitted inside the constant pressure cover and located above the pressure relief hole. The spring is placed inside the constant pressure cover and located between the constant pressure cover and the plug. The end face of the constant pressure cover is provided with an air outlet.

[0005] This invention provides a constant pressure air pump. In this constant pressure air pump, the drive assembly drives the pump core device to work, and a volume difference is formed in the cavity inside the housing. Gas enters from the air inlet channel and exits from the air outlet. A pressure relief module is composed of a plug and a spring, and the pressure is stable and adjustable. The spring force makes the pressure relief smooth and does not produce large airflow noise. The constant pressure air pump provides good protection for the application terminal, improves safety performance, and avoids overpressure of the inflation container.

[0006] In some embodiments, the plug is spherical; or, the plug is cylindrical.

[0007] Therefore, spherical and cylindrical plugs have relatively good sealing performance.

[0008] In some embodiments, the housing includes a cover, a sealing sheet, a main body, an upper bracket, and a lower bracket. The cover is located at the upper end of the main body, the sealing sheet is located on the main body and acts between the cover and the main body, the upper bracket is located at the lower end of the main body, and the lower bracket is located at the lower end of the upper bracket.

[0009] Therefore, the shell is composed of the above-described structure.

[0010] In some embodiments, the cover body is provided with an air chamber, the air outlet is connected to the pressure relief hole through the air chamber, the cover body is provided with an installation groove, the pressure relief hole is provided on the cover body and located on the bottom surface of the installation groove, and the constant pressure device is provided on the installation groove.

[0011] Therefore, the constant pressure device is embedded in the cover.

[0012] In some embodiments, a first thread is provided in the mounting groove, and a second thread that mates with the first thread is provided on the outer wall of the constant pressure cover.

[0013] Therefore, by turning the constant pressure knob, the compression spring, that is, the spring force, can be adjusted, and the maximum pressure inside the housing can be adjusted.

[0014] In some embodiments, the housing further includes several buckles, and multiple sides of the cover, main body, upper bracket, and lower bracket are provided with matching slots. One of the buckles is embedded in the matching slot of the cover, main body, upper bracket, and lower bracket, and the multiple buckles fasten the cover, main body, upper bracket, and lower bracket.

[0015] Thus, the cover, main body, upper bracket, and lower bracket are connected and installed using several clips.

[0016] In some embodiments, the upper end face of the main body is provided with a mounting post, the lower end face of the cover is provided with a limiting groove, the sealing sheet is provided with a limiting hole, and the mounting post penetrates the limiting hole and is inserted into the limiting groove.

[0017] Therefore, by inserting the mounting post through the limiting hole into the limiting groove, the cover, sealing plate, and main body are limited and connected, thereby ensuring a stable connection between the cover, sealing plate, and main body.

[0018] In some embodiments, a first sealing ridge is provided on the lower end face of the cover, and a second sealing ridge is provided on the upper end face of the main body, wherein the first sealing ridge and the second sealing ridge clamp the sealing sheet.

[0019] Thus, an air outlet chamber is formed inside the first and second sealing ridges, and an air inlet chamber is formed outside the first and second sealing ridges; the air outlet chamber is connected to the air outlet nozzle, and the air inlet chamber is connected to the air inlet channel. The air outlet and air inlet are dynamically connected through a pump core device.

[0020] In some embodiments, the pump core assembly includes a piston and a plurality of umbrella valves, the piston being disposed within a housing and drivenly connected to a drive assembly, and the plurality of umbrella valves being disposed within the housing and embedded in the piston.

[0021] Therefore, the pump core assembly consists of the above-described structure.

[0022] In some embodiments, the drive assembly includes a motor, an eccentric wheel, a swing frame, and a drive shaft. The motor is located at the lower end of the housing, the eccentric wheel is located at the drive end of the motor, the swing frame is connected to the eccentric wheel via the drive shaft, and the swing frame is drivenly connected to the pump core device.

[0023] Therefore, the drive component consists of the structure described above. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a constant pressure air pump according to one embodiment of the present invention.

[0025] Figure 2 for Figure 1 The diagram shows a three-dimensional structure of a constant pressure air pump in an explosion state.

[0026] Figure 3 for Figure 1 The diagram shows a three-dimensional cross-sectional structure of the housing in a constant pressure air pump.

[0027] Figure 4 for Figure 1 The diagram shows a three-dimensional cross-sectional structure of a portion of the casing of a constant pressure air pump.

[0028] Figure 5 for Figure 1 The diagram shows a three-dimensional structural representation of the exploded state of a portion of the casing in a constant pressure air pump.

[0029] Figure 6 for Figure 1 The diagram shows a three-dimensional structural representation of the explosion state of the pump core in a constant pressure air pump.

[0030] Figure 7 for Figure 1 The diagram shows a three-dimensional structural representation of the explosion state of the drive component in a constant pressure air pump.

[0031] The diagram labels are as follows: 100-shell, 110-cover, 111-first sealing ridge, 1111-inner groove, 1112-outer groove, 112-limiting groove, 113-mounting groove, 114-pressure relief hole, 120-sealing plate, 121-limiting hole, 122-first vent, 123-second vent, 130-body, 131-second sealing ridge, 1311-inner ring, 1312-outer ring, 132-exhaust hole, 133-intake hole, 134-mounting post, 140-upper bracket, 141-mounting hole, 150-lower bracket. 160-Snap fastener, 101-Slot, 200-Pump core assembly, 210-Piston, 211-Groove, 212-Allowing hole, 220-Umbrella valve, 300-Drive assembly, 310-Motor, 320-Eccentric wheel, 330-Swing frame, 340-Drive shaft, 400-Intake channel, 401-First intake hole, 402-Second intake hole, 500-Outlet nozzle, 600-Constant pressure device, 610-Constant pressure cover, 611-Outlet hole, 620-Spring, 630-Plug, a-Intake chamber, b-Outlet chamber, c-Diaphragm chamber. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings.

[0033] Figure 1-3 The diagram schematically illustrates a constant pressure air pump according to one embodiment of the present invention, including a housing 100, a pump core device 200, a drive assembly 300, an air inlet channel 400, and an air outlet 500. The housing 100 is fixedly installed; the pump core device 200 is disposed within the housing 100; the drive assembly 300 is disposed on the housing 100 and drivenly connected to the pump core device 200, configured to provide driving force to the pump valve device; the air inlet channel 400 and the air outlet 500 are both disposed on the housing 100, and are dynamically connected through the pump core device 200; under the drive of the drive assembly 300, the pump core device 200 operates, creating a volume difference inside the housing 100, allowing gas to enter through the air inlet channel 400 and exit through the air outlet 500.

[0034] Combination Figure 4-5 The constant pressure device 600 includes a constant pressure cover 610, a spring 620, and a plug 630. The constant pressure cover 610 covers the pressure relief hole 114, and the plug 630 is fitted inside the constant pressure cover 610 and located above the pressure relief hole 114. The spring 620 is located inside the constant pressure cover 610 and between the constant pressure cover 610 and the plug 630, that is, both ends of the spring 620 are in contact with the top inner wall of the constant pressure cover 610 and the upper surface of the plug 630, respectively; the end face of the constant pressure cover 610 is provided with an air vent. In this embodiment, the plug 630 is made of rubber.

[0035] This invention provides a constant pressure air pump. In this constant pressure air pump, the drive assembly 300 drives the pump core device 200 to work, and a volume difference is formed in the cavity within the housing 100. Gas is input from the air inlet channel 400 and output from the air outlet 500. A pressure relief module is formed by using a plug 630 and a spring 620, and the pressure is stable and adjustable. The force of the spring 620 makes the pressure relief smooth and does not produce large airflow noise. The constant pressure air pump provides good protection for the application terminal, improves safety performance, and avoids overpressure of the inflation container.

[0036] Combination Figure 2 The housing 100 includes a cover 110, a sealing plate 120, a main body 130, an upper support 140, and a lower support 150. The cover 110 is located at the upper end of the main body 130, the sealing plate 120 is located on the main body 130 and acts between the cover 110 and the main body 130, the upper support 140 is located at the lower end of the main body 130, and the lower support 150 is located at the lower end of the upper support 140. The housing 100 is composed of the above structure.

[0037] Combination Figure 3 In this embodiment, the air outlet 500 is integrally formed on the cover 110. The air intake channel 400 is formed on the housing 100. The sealing plate 120, main body 130, and upper bracket 140 are provided with first air intake holes 401, and the lower end face of the lower bracket 150 is provided with a second air intake hole 402. When the sealing plate 120, main body 130, and upper bracket 140 are connected, the first air intake holes 401 at the same position on the sealing plate 120, main body 130, upper bracket 140, and lower bracket 150 are interconnected and communicate with each other, thereby forming the air intake channel 400. Multiple first air intake holes 401 can be provided on a single component, meaning multiple air intake channels can be provided.

[0038] Combination Figure 4-5 The cover 110 has a mounting groove 113, and a pressure relief hole 114 is located on the cover 110 and on the bottom surface of the mounting groove 113. A constant pressure device 600 is mounted on the mounting groove 113. The constant pressure device 600 is embedded in the cover 110. A first thread is provided in the mounting groove 113, and a second thread that mates with the first thread is provided on the outer wall of the constant pressure cover 610. By rotating the knob on the constant pressure cover 610, the compression spring 620 can be adjusted, i.e., the elastic force of the spring 620 can be adjusted, thereby regulating the maximum internal pressure of the housing 100.

[0039] Combination Figure 4 The plug 630 is either spherical or cylindrical. Both spherical and cylindrical plugs 630 offer relatively good sealing performance.

[0040] Preferably, when the plug 630 is cylindrical, a limiting block is provided on the upper end face of the plug 630. The limiting block is embedded and cooperates with the spring 620, which can improve the force stability of the plug 630 on the spring 620.

[0041] Combination Figure 2 The housing 100 also includes several snap fasteners 160. Matching slots 101 are provided on multiple sides of the cover 110, main body 130, upper bracket 140, and lower bracket 150. One snap fastener 160 is inserted into the matching slot 101 of the cover 110, main body 130, upper bracket 140, and lower bracket 150, and the multiple snap fasteners 160 fasten the cover 110, main body 130, upper bracket 140, and lower bracket 150. The cover 110, main body 130, upper bracket 140, and lower bracket 150 are connected and installed through the multiple snap fasteners 160.

[0042] Combination Figure 5-6 The upper end face of the main body 130 is provided with a mounting post 134, the lower end face of the cover 110 is provided with a limiting groove 112, and the sealing sheet 120 is provided with a limiting hole 121. The mounting post 134 penetrates the limiting hole 121 and inserts into the limiting groove 112. By inserting the mounting post 134 through the limiting hole 121 into the limiting groove 112, the cover 110, the sealing sheet 120, and the main body 130 are connected in a limiting manner, thereby ensuring a stable connection between the cover 110, the sealing sheet 120, and the main body 130.

[0043] Combination Figure 5-6 A first sealing ridge 111 is provided on the lower end face of the cover 110, and a second sealing ridge 131 is provided on the upper end face of the main body 130. The first sealing ridge 111 and the second sealing ridge 131 clamp the sealing sheet 120. An air outlet chamber b is formed on the inner side of the first sealing ridge 111 and the second sealing ridge 131, and an air inlet chamber a is formed on the outer side of the first sealing ridge 111 and the second sealing ridge 131. The air outlet chamber b is connected to the air outlet nozzle 500, and the air inlet chamber a is connected to the air inlet channel 400. The air outlet chamber b and the air inlet chamber a are dynamically connected through the pump core device 200.

[0044] Combination Figure 4-6 The pump core device 200 includes a piston 210 and several umbrella valves 220. The piston 210 is disposed inside the housing 100 and is drivenly connected to the drive assembly 300. The several umbrella valves 220 are all disposed inside the housing 100 and embedded in the piston 210. The pump core device 200 is composed of the above structure.

[0045] In this embodiment, a clearance hole 212 matching the first air inlet 401 is also provided on the piston 210; the end face of the piston 210 is clamped between the upper bracket 140 and the main body 130, so it is necessary to connect the first air inlet 401 on the bracket 140 and the main body 130, therefore a clearance hole 212 is provided on the piston 210 (e.g., Figure 3 (As shown).

[0046] The piston 210 is made of an elastic material, such as rubber. The top of the piston 210 is hollowed out to form three grooves 211. The upper bracket 140 is provided with four mounting holes 141 for mounting the piston 210. The outer wall of the grooves 211 can pass through the four mounting holes 141. The driving end of the piston 210 has four independent conical structures. The lower end of the piston 210 passes through the upper bracket 140 and extends into the lower bracket 150. The Y-shaped structure at the top of the swing frame 330 is correspondingly fitted onto the four conical structures at the driving end of the piston 210.

[0047] Combination Figure 4-6 A first sealing ridge 111 is provided on the lower end face of the cover 110, dividing the main body 130 into an inner groove 1111 and an outer groove 1112. The outer groove 1112 forms the air intake chamber a, while the inner groove 1111 forms the air outlet chamber b. The main body 130 is placed on the upper support 140. A second sealing ridge 131 is provided on the top of the main body 130, dividing the main body 130 into an inner ring 1311 and an outer ring 1312. The outer ring 1312 forms the air intake chamber a, while the inner ring 1311 forms the air outlet chamber b. The sealing sheet 120 is provided with a first vent hole 122 and a second vent hole 123, thereby connecting the cover 110 and the air outlet chamber b of the main body 130 through the first vent hole 122, and connecting the cover 110 and the air intake chamber a of the main body 130 through the second vent hole 123.

[0048] The inner ring 1311 on the top surface of the main body 130 is provided with four discharge holes 132 at intervals, and the discharge holes 132 are matched with vent holes; the outer ring 1312 on the top surface of the main body 130 is provided with four sets of suction holes 133 at intervals, and the four sets of suction holes 133 are arranged circumferentially along the four discharge holes 132; the top edge of the piston 210 is pressed between the upper support 140 and the main body 130, so that the upper support 140 and the main body 130 form a sealing structure; the piston 210 is covered at the bottom end of the main body 130, and the four grooves 21 1. Four independent diaphragm chambers c are formed at the bottom of the main body 130. Each diaphragm chamber c contains an umbrella valve 220. Each umbrella valve 220 is in the shape of an inverted umbrella. The upper ends of the four umbrella valves 220 are movably inserted into the mounting post 134 of the main body 130. The lower ends of the four umbrella valves 220 are movably covered on the four sets of suction holes 133, thereby controlling the four sets of suction holes 133 to open and close in one direction. The check valve is covered on the discharge hole 132, and the check valve controls the four discharge holes 132 to open and close in one direction.

[0049] In this application, four sets of suction holes 133, four umbrella valves 220, and four discharge holes 132 are provided. The number of suction holes 133 in each set is not limited and can be two, three, four, five, etc. Setting multiple suction holes 133 can accelerate the flow of gas.

[0050] Combination Figure 7 The drive assembly 300 includes a motor 310, an eccentric wheel 320, a swing frame 330, and a drive shaft 340. The motor 310 is located at the lower end of the lower bracket 150, the eccentric wheel 320 is located at the drive end of the motor 310, and the swing frame 330 is connected to the eccentric wheel 320 via the drive shaft 340. The swing frame 330 is drivenly connected to the pump core device 200. The motor 310 is fixed to the lower end of the lower bracket 150 by bolts. The lower bracket 150 is hollow inside, and the eccentric wheel 320, the swing frame 330, and the drive shaft 340 are all located in the hollow inner cavity of the lower bracket 150.

[0051] The swing frame 330 is connected to the eccentric wheel 320 via the drive shaft 340. The swing frame 330 is inclined relative to the eccentric wheel 320. The piston 210 assembly is connected to the swing frame 330. The movement of the swing frame 330 drives the piston 210 assembly to perform piston 210 movement. When the eccentric wheel 320 rotates, the drive shaft 340 rotates simultaneously, driving the swing frame 330 to rotate. The swing frame 330 swings up and down, driving the piston 210 assembly to perform piston 210 movement, thereby realizing the intake or exhaust action.

[0052] The above are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A constant pressure air pump, characterized in that, include Housing (100), fixedly installed; The pump core assembly (200) is located inside the housing (100); A drive assembly (300), disposed on the housing (100) and drivenly connected to the pump core assembly (200), is configured to provide driving force to the pump valve assembly. The air intake channel (400) and the air outlet (500) are both located on the housing (100). A constant pressure device is installed on the housing (100), and the housing (100) is provided with a pressure relief hole. The constant pressure device is connected to the inside of the housing (100) through the pressure relief hole. The constant pressure device (600) includes a constant pressure cover (610), a spring (620), and a plug (630). The constant pressure cover (610) is placed over the pressure relief hole (114). The plug (630) is fitted inside the constant pressure cover (610) and located above the pressure relief hole (114). The spring (620) is located inside the constant pressure cover (610) and between the constant pressure cover (610) and the plug (630). The end face of the constant pressure cover (610) is provided with an air outlet (611).

2. The constant pressure air pump according to claim 1, characterized in that, The housing (100) includes a cover (110), a sealing plate (120), a main body (130), an upper bracket (140), and a lower bracket (150). The cover (110) is located at the upper end of the main body (130), the sealing plate (120) is located on the main body (130), and the sealing plate (120) acts between the cover (110) and the main body (130). The upper bracket (140) is located at the lower end of the main body (130), and the lower bracket (150) is located at the lower end of the upper bracket (140).

3. A constant pressure air pump according to claim 2, characterized in that, The cover (110) is provided with an installation groove (113), the pressure relief hole (114) is provided on the cover (110) and located on the bottom surface of the installation groove (113), and the constant pressure device (600) is provided on the installation groove (113).

4. A constant pressure air pump according to claim 3, characterized in that, The mounting groove (113) is provided with a first thread, and the outer wall of the constant pressure cover (610) is provided with a second thread that matches the first thread.

5. A constant pressure air pump according to claim 2, characterized in that, The plug (630) is spherical; or, the plug (630) is cylindrical.

6. A constant pressure air pump according to claim 2, characterized in that, The housing (100) also includes several buckles (160). The cover (110), the main body (130), the upper bracket (140), and the lower bracket (150) are provided with matching slots (101) on multiple sides. One of the buckles (160) is embedded in the matching slot (101) of the cover (110), the main body (130), the upper bracket (140), and the lower bracket (150). The multiple buckles (160) fasten the cover (110), the main body (130), the upper bracket (140), and the lower bracket (150).

7. A constant pressure air pump according to claim 2, characterized in that, The upper end face of the main body (130) is provided with a mounting post (134), the lower end face of the cover (110) is provided with a limiting groove (112), the sealing sheet (120) is provided with a limiting hole (121), and the mounting post (134) penetrates the limiting hole (121) and is inserted into the limiting groove (112).

8. A constant pressure air pump according to claim 2, characterized in that, The lower end face of the cover (110) is provided with a first sealing ridge (111), and the upper end face of the main body (130) is provided with a second sealing ridge (131). The first sealing ridge (111) and the second sealing ridge (131) clamp the sealing sheet (120).

9. A constant pressure air pump according to any one of claims 1-8, characterized in that, The pump core device (200) includes a piston (210) and a plurality of umbrella valves (220). The piston (210) is located inside the housing (100) and is drivenly connected to the drive assembly (300). The plurality of umbrella valves (220) are all located inside the housing (100) and embedded in the piston (210).

10. A constant pressure air pump according to any one of claims 1-8, characterized in that, The drive assembly (300) includes a motor (310), an eccentric wheel (320), a swing frame (330), and a transmission shaft (340). The motor (310) is located at the lower end of the housing (100), the eccentric wheel (320) is located at the drive end of the motor (310), the swing frame (330) is connected to the eccentric wheel (320) through the transmission shaft (340), and the swing frame (330) is drivenly connected to the pump core device (200).

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