Air pump with external pressure relief valve

Abstract

An air pump with an external pressure relief valve includes an air pump body, a flow channel seat, and at least one air valve. The air pump body includes a drive motor and at least one airbag assembly for generating airflow. The flow channel seat is provided with an airflow channel and a pressure relief channel connected to the airflow channel and extending to any side wall of the flow channel seat. A mounting hole for the outlet of the pressure relief channel is provided on the side wall, and a pressure relief component is configured to be placed in the pressure relief channel through the mounting hole. The present invention provides the air pump with the pressure relief channel and extends the pressure relief channel to any side wall, so that the air pump can be connected to different objects to be inflated respectively, and at the same time, the assembler can more easily adjust the output air pressure of each air pump.

Description

Technical Field

[0001] The present invention relates to an air pump with an external pressure relief valve, and in particular to an air pump which utilizes a pressure relief channel that can extend to any side wall of a flow channel seat to facilitate users to adjust the air pump pressure. Background Art

[0002] Due to the limited assembly space within a car seat, the automotive electronics industry currently employs air pumps that often incorporate a combined solenoid valve to reduce bulk. Specifically, the combined solenoid valve comprises at least one solenoid valve and at least one check valve corresponding to the solenoid valve. Related technologies for air pumps incorporating such combined solenoid valves are disclosed in Chinese Patent No. CN102161321B and others. The air pump comprises at least one fluid chamber and a valve assembly communicating with the at least one fluid chamber. The valve assembly comprises a check valve and a solenoid valve. While the patent discloses that the air pump incorporates the check valve and the solenoid valve, it eliminates the need for additional pressure control and avoids unnecessary bulk. However, each air pump serves a different function for the inflatable object. Therefore, the present invention incorporates a pressure relief channel and a pressure relief assembly to facilitate assembly, allowing assemblers to adjust the output pressure of each air pump to meet the pressure requirements of each inflatable object during assembly. Summary of the Invention

[0003] The main purpose of the present invention is to solve the problem that although the existing air pump has a solenoid valve and a check valve to control the air flow, it still cannot avoid the over-saturation of the inflatable object.

[0004] To achieve the above-mentioned purpose, the present invention provides an air pump with an external pressure relief valve, the air pump comprising an air pump body, a flow channel seat and at least one air valve, the flow channel seat being connected to the air pump body, the air pump body comprising a driving motor and at least one air bag group actuated by the driving motor and generating an airflow, the flow channel seat being provided with an air flow channel for receiving an output airflow of the air bag group and having at least one airflow outlet, and a pressure relief channel connected to the air flow channel and extending to any side wall of the flow channel seat, an installation hole for the pressure relief channel outlet being provided on the side wall, and a pressure relief component to be placed in the pressure relief channel being configured by the installation hole, the air valve being connected to the flow channel seat and connected to the airflow outlet for receiving the output airflow.

[0005] In one embodiment, the pressure relief channel has a connecting section, a movable section and a mounting section with different inner diameters from the position connected to the air flow channel to the mounting hole, and the order of the inner diameters is connecting section < movable section < mounting section.

[0006] In one embodiment, the pressure relief assembly includes a fixed part arranged in the installation section and a movable part arranged in the movable section and abutting the fixed part with an elastic part. The outer diameter of the movable part is larger than the inner diameter of the connecting section and smaller than the inner diameter of the installing section, so that the movable part has a closed position for closing the connecting section and a pressure relief position for allowing the air in the air flow channel to pass through the connecting section and be discharged to the outside through the installation hole due to the pressure change in the air flow channel caused by the elastic part.

[0007] In one embodiment, an air stopper is further provided between the movable member and the connecting section to assist in closing the passage of airflow.

[0008] In one embodiment, a breathable member is provided on the fixing member to connect the mounting section with the outside so that the decompressed air flow can be discharged to the outside.

[0009] In one embodiment, the flow channel seat is further provided with at least one first connecting portion for accommodating the air valve at the position of the air flow outlet.

[0010] In one embodiment, the flow channel seat is further provided with a control circuit board for providing electrical signals to the drive motor and the air valve, and a second connecting portion for accommodating the control circuit board.

[0011] In one embodiment, the flow channel seat is further provided with a cover for covering the air valve and the control circuit board. The cover is provided with at least one output hole for connecting the air valve and one wiring hole for connecting the control circuit board.

[0012] As disclosed above, the present invention has the following features compared to the prior art: the present invention is provided with the pressure relief channel by the air pump, and the pressure relief channel extends to the either side wall of the flow channel seat. In addition, the installation hole is opened on the side wall surface, and the assembler can insert the pressure relief group through the installation hole, which makes it more convenient for the assembler to operate the pressure relief component to adjust the pressure of the air pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 , a schematic diagram of the appearance of an embodiment of the present invention.

[0014] Figure 2 , a schematic diagram of the structural decomposition of an embodiment of the present invention (1).

[0015] Figure 3 , a schematic diagram of the structural decomposition of an embodiment of the present invention (II).

[0016] Figure 4 , a cross-sectional schematic diagram of an embodiment of the present invention (1).

[0017] Figure 5 , a schematic diagram of the implementation status of an embodiment of the present invention (1).

[0018] Figure 6 , schematic diagram of the implementation status of an embodiment of the present invention (2).

[0019] Figure 7 , a cross-sectional schematic diagram of an embodiment of the present invention (II).

[0020] Figure 8 , a cross-sectional schematic diagram of an embodiment of the present invention (III).

[0021] The accompanying drawings are denoted as follows:

[0022] 10.............Air pump body

[0023] 11. Drive motor

[0024] 12.............Airbag assembly

[0025] 13.............electrical wires

[0026] 121.............Exhaust hole

[0027] 20.............Runner seat

[0028] 21..............airflow channel

[0029] 211.............Airflow outlet

[0030] 22.............Pressure relief channel

[0031] 221.............Connection section

[0032] 222.............Activity section

[0033] 223.............Installation section

[0034] 23................Mounting hole

[0035] 24..............Pressure relief assembly

[0036] 241.............Fixtures

[0037] 242.............Elastic parts

[0038] 243.............moving parts

[0039] 244.............Ventilation hole

[0040] 245.............Breathable parts

[0041] 246.............Limiting arm

[0042] 247.............Air stop

[0043] 25..............Fasteners

[0044] 26..................First connection part

[0045] 261................Limit block

[0046] 27...............Control circuit board

[0047] 271...............Electrical pins

[0048] 28...............Second connection part

[0049] 281...............Assembly convex block

[0050] 29...............LID

[0051] 291...............Support plate

[0052] 292...............Output hole

[0053] 293...............Connection hole

[0054] 294...............Connection hole

[0055] 30................Air valve

[0056] 31...............Silencers

[0057] 32..................Check valve

[0058] 321...............Limiting hole

[0059] 100...............Air pump DETAILED DESCRIPTION

[0060] The detailed description and technical content of the present invention are now described as follows with reference to the accompanying drawings:

[0061] See also Figures 1 to 3 The present invention provides an air pump 100 with an external pressure relief valve. The air pump 100 includes an air pump body 10, a flow channel seat 20, and at least one air valve 30. The flow channel seat 20 is provided on the air pump body 10, and the air valve 30 is connected to the flow channel seat 20. Specifically, the air pump body 10 includes a driving motor 11 and at least one air bag assembly 12 driven by the driving motor 11 and generating an output air flow. The air bag assembly 12 has an exhaust hole 121, which is connected to the air bag assembly 12 and outputs the output air flow. The implementation of the driving motor 11 and the air bag assembly 12 can refer to Chinese Patent Publication No. CN 206290397U and Chinese Patent Application No. CN 201810141741.X filed by the applicant, and will not be repeated here. On the other hand, the flow channel seat 20 is provided with an air flow channel 21 for receiving the output air flow and a pressure relief channel 22 connected to the air flow channel 21 and extending to any side wall of the flow channel seat 20. Figure 2 and Figure 3 , one end of the air flow channel 21 is connected to the exhaust hole 121, and an air flow outlet 211 is provided at the other end for the output air flow to be discharged, and the pressure relief channel 22 is provided on the flow channel seat 20, and in order to enable the pressure relief channel 22 to quickly discharge the output air flow, the pressure relief channel 22 can be provided in the center of the air flow channel 21, and can extend in any direction of the flow channel seat 20 where the air flow outlet 211 is not provided. In other words, the extension direction of the pressure relief channel 22 can be adjusted according to the use requirements and is not limited to that shown in the figure. In addition, in order for the pressure relief channel 22 to be exposed on the side wall surface, a mounting hole 23 for the pressure relief channel 22 to flow must be provided on the side wall surface, and a pressure relief component 24 can be placed in the pressure relief channel 22 through the mounting hole 23. Furthermore, the at least one air valve 30 is installed on the flow channel seat 20 and connected to the air flow outlet 211 to discharge the output air flow to inflate an object to be inflated.

[0062] In accordance with the above, and Figure 4 and Figure 5To describe the pressure relief passage 22 in detail, the pressure relief passage 22 is divided into a connecting section 221, a movable section 222, and a mounting section 223. In one embodiment, the connecting section 221, the movable section 222, and the mounting section 223 each have different inner diameters, wherein the order of inner diameters is connecting section 221 < movable section 222 < mounting section 223. Furthermore, the pressure relief assembly 24 will be described in more detail. The pressure relief assembly 24 includes a fixing member 241 disposed within the mounting section 223, and a movable member 243 disposed within the movable section 222 and abutted against the fixing member 241 by an elastic member 242. Specifically, to facilitate user operation of the fixing member 241 while securing it to the mounting section 223, the fixing member 241 is threadedly connected to the mounting section 223. In other words, the fixing member 241 can be adjusted by a user by twisting the knob. Furthermore, the ends of the elastic member 242 respectively abut against the movable member 243 and the fixed member 241. That is, the elastic member 242 is acted upon by the fixed member 241 and pushes against the movable member 243. Furthermore, the movable member 243, in response to pressure changes within the pressure relief passage 22, has a closed position that seals the connecting section 221 and a pressure relief position that allows air within the airflow passage 21 to escape through the connecting section 221. In other words, during the development process, the outer diameter of the movable member 243 must be larger than the inner diameter of the connecting section 221 so that the movable member 243 can completely seal the connecting section 221 and prevent airflow within the airflow passage 21 from escaping. Furthermore, to allow the movable member 243 to fit within the movable section 222, its outer diameter must be smaller than the inner diameters of the mounting section 223 and the mounting hole 23, allowing the movable member 243 to enter through the mounting hole 23 during assembly. In one embodiment, the fixing member 241 has a vent 244 connecting the mounting section 223 with the outside. This vent 244 allows the decompressed air to be discharged to the outside. Furthermore, the vent 244 is covered with a breathable member 245, which can be made of a cotton material. In other words, during the assembly process, the breathable member 245 is placed on the fixing member 241, and during the operation, the breathable member 245 allows the output air to be discharged to the outside.

[0063] Next, the embodiment of the pressure relief assembly 24 will be described. It is assumed that the movable member 243 is located in the closed position by the elastic member 242 due to the pressure change in the air flow channel 21. Figure 5 As shown, on the other hand, when the movable member 243 is not affected by the elastic member 242 and is located at the pressure relief position, Figure 6Specifically, to prevent the air pump 100 from over-inflating the object to be inflated, the degree of tightening of the fixing member 241 on the mounting section 223 can be used to act on the elastic member 242, thereby limiting the pressure of the output airflow. In other words, the gas pressure of the output airflow can be adjusted by the fixing member 241, and the gas pressure must not be greater than the pushing force applied by the elastic member 242 to the movable member 243. In other words, the maximum gas pressure will be equal to the degree of compression of the elastic member 242, and the degree of compression of the elastic member 242 is determined by the force applied by the fixing member 241 to the elastic member 242. Therefore, the force applied by the fixing member 241 to the elastic member 242 is first adjusted, and the output airflow is generated by the drive motor 11 and the airbag assembly 12, and the output airflow is output along the airflow channel 21 to the pressure relief channel 22. When the gas pressure is less than the pushing force exerted by the elastic member 242 on the movable member 243, the movable member 243 will be in the closed position. At this point, the connecting section 221 will be closed, and the output airflow will be discharged only from the airflow outlet 211. Thereafter, as the air pump 100 continues to operate, the gas pressure will continue to increase. Once the gas pressure exceeds the pushing force exerted by the elastic member 242 on the movable member 243, the movable member 243 will move from the closed position away from the connecting section 221. At this point, the connecting section 221 will transition from closed to open, allowing a portion of the output airflow to pass through the connecting section 221 and be discharged externally through the mounting hole 23, thereby reducing the gas pressure within the airflow channel 21. Once the gas pressure drops below the pushing force exerted by the elastic member 242 on the movable member 243, the movable member 243 will return to the closed position.

[0064] The present invention provides the fixing member 241 on the mounting hole 23, allowing the user to easily operate the fixing member 241. By adjusting the force applied by the fixing member 241 to the elastic member 242, the force applied by the elastic member 242 to the movable member 243 is determined to adjust the pressure of the output airflow. Compared to conventional air pumps, the present invention provides the air pump 100 with the pressure relief channel 22, and the pressure relief channel 22 can extend toward the side wall surface, so that the pressure relief component 24 can be exposed on the air pump 100. Through the present invention, each air pump 100 can correspond to a different object to be inflated, and the assembler can easily adjust the pressure of the air pump 100 during the assembly process to respond to the gas pressure required by the different objects to be inflated.

[0065] In one embodiment, please refer to Figure 5 and Figure 6During implementation, to ensure that the movable member 243, when in the closed position, can more reliably seal the connecting section 221 and prevent the output gas from leaking out, the pressure relief assembly 24 further includes a gas stopper 247. This gas stopper 247 is positioned between the movable member 243 and the connecting section 221 to assist in sealing the output gas flow. The outer diameter of the gas stopper 247 must be larger than the inner diameter of the connecting section 221 but smaller than the inner diameter of the mounting section 223. This allows the gas stopper 247 to be inserted into the movable section 222 and seal the connecting section 221. In other words, during assembly, the assembler must first insert the gas stopper 247 into the movable section 222 to seal the connecting section 221, and then insert the movable member 243 to complete the assembly. In addition, during the implementation process, when the movable part 243 is located at the pressure relief position due to the air flow pressure, the air stop part 247 will also be displaced away from the connecting section 221 due to the air flow pressure. When the air flow pressure decreases, the air stop part 247 will also return with the movable part 243 and close the connecting section 221 again.

[0066] In one embodiment, please refer to Figure 2 and Figure 3 In order to effectively cover the breathable member 245 on the breathable hole 244, the fixing member 241 may be provided with at least one limiting arm 246. During the assembly process, the assembler may use the limiting arm 246 to fix the breathable member 245 and prevent the breathable member 245 from falling off during the implementation process.

[0067] In one embodiment, please refer to Figure 1 In order to strengthen the connection strength between the flow channel seat 20 and the air pump body 10, at least one fastener 25 may be provided on the flow channel seat 20. The fastener 25 is used to strengthen the connection strength between the flow channel seat 20 and the air pump body 10, thereby preventing the flow channel seat 20 from being separated from the air pump body 10 due to the vibration generated by the gas during use of the air pump 100.

[0068] On the other hand, see Figures 1 to 3 The flow channel seat 20 is further provided with a first connecting portion 26 for accommodating at least one air valve 30. The first connecting portion 26 is located at the position of the air flow outlet 211, so that the air valve 30 can be assembled on the first connecting portion 26 and receive the output air flow output by the air flow outlet 211. More specifically, the air valve 30 can be set on the first connecting portion 26 in a snap-fit ​​manner, allowing the assembler to easily connect the air valve 30 to the first connecting portion 26. In addition, when the air valve 30 needs to be repaired or replaced, the maintenance personnel can also easily replace the air valve 30. In addition, please refer to Figure 8The air valve 30 may be further provided with a silencer 31. When the air pump 100 is deflated, the airflow may be redirected by the silencer 31, thereby buffering the airflow and reducing the noise generated by the airflow.

[0069] As described above, the air valve 30 may further include a check valve 32 to prevent reverse flow of the output airflow when the air valve 30 is inflating the inflatable object. Furthermore, the check valve 32 is connected to the air valve 30 and is engaged with the first connecting portion 26. More specifically, the first connecting portion 26 has a stopper 261, and the check valve 32 is provided with a stopper hole 321 corresponding to the stopper block 261. During assembly, when the air valve 30 is installed on the first connecting portion 26, the stopper block 261 is inserted into the stopper hole 321 to hold the air valve 30 in place and prevent it from being detached from the first connecting portion 26. Furthermore, the number of air valves 30 provided can be as shown in the figure, with two air valves 30 as an embodiment, but this number can also be adjusted based on usage requirements.

[0070] See also Figure 2 In one embodiment, the air pump body 10 may be provided with an electrical wire 13, and the flow channel seat 20 may be further provided with a control circuit board 27 for providing electrical signals to the drive motor 11 and the air valve 30. In other words, the electrical wire 13 can be used to provide power to the drive motor 11, enabling the drive motor 11 to operate. On the other hand, the drive motor 11 and the air valve 30 receive electrical signals from the control circuit board 27 to determine whether to open or close the drive motor 11 and the air valve 30. More specifically, the control circuit board 27 includes at least one electrical pin 271, which is used to connect to a port and receive electrical control signals transmitted by the port. Furthermore, to ensure that the control circuit board 27 can be securely assembled to the flow channel seat 20, the flow channel seat 20 is provided with a second connecting portion 28 for accommodating the control circuit board 27. Specifically, the second connecting portion 28 is disposed opposite the first connecting portion 26.

[0071] Please refer to Figure 2In one embodiment, to protect the air valve 30 and the control circuit board 27, a cover 29 is provided on the flow channel seat 20 to cover the air valve 30 and the control circuit board 27. The purpose of the cover 29 is to prevent the air valve 30 and the control circuit board 27 from breaking due to stress. Furthermore, since the air valve 30 is exposed when installed on the flow channel seat 20, that is, there are no protective structures on both sides of the air valve 30, the cover 29 can be further provided with a plurality of support plates 291. The two support plates 291 are arranged on both sides of the air valve 30 to protect the air valve 30 from collisions and to limit the position of the air valve 30 to prevent the air valve 30 from displacement due to the vibration generated by the air pump 100 during operation. In addition, to enable the air valve 30 to inflate the inflatable object and facilitate wiring to the control circuit board 27, the cover 29 may be provided with at least one output hole 292 for connecting the air valve 30 and one wiring hole 293 for connecting the control circuit board 27. The output hole 292 is provided on the cover 29 primarily to protect the outlet nozzle of the air valve 30 from breakage. Furthermore, the design of the output hole 292 and the wiring hole 293 need only meet the requirements of the air valve 30 for inflating the inflatable object and facilitate wiring to the control circuit board 27, and are not limited to the design shown in the figure. Furthermore, during assembly, the cover 29 is placed on the flow channel seat 20. To prevent the cover 29 from falling off the flow channel seat 20, in one embodiment, the second connecting portion 28 may be provided with a mounting protrusion 281, and the cover 29 may be provided with a mounting hole 294 corresponding to the mounting protrusion 281. That is, when the cover 29 is mounted on the flow channel seat 20, the assembly protrusion 281 will be inserted into the assembly hole 294. In addition, the arrangement positions of the assembly hole 294 and the assembly protrusion 281 are not limited to those shown in the figure.

Claims

1. An air pump with an external pressure relief valve, characterized in that include: An air pump body comprising a driving motor and at least one air bag assembly driven by the driving motor to generate airflow; a flow channel seat connected to the air pump body, the flow channel seat being provided with an air flow channel for receiving an output air flow of the airbag assembly and having at least two air flow outlets, and a pressure relief channel connected to the air flow channel and extending to any side wall of the flow channel seat, a mounting hole for the pressure relief channel outlet being opened on the side wall, and a pressure relief component configured to be placed in the pressure relief channel through the mounting hole, the pressure relief component adjusting the pressure of the air pump, the pressure relief channel being provided in the center of the air flow channel, and having a connecting section, a movable section, and a mounting section with different inner diameters from the position connected to the air flow channel to the mounting hole, and the order of the inner diameters being connecting section < movable section < mounting section; At least two air valves are connected to the flow channel seat and are respectively connected to the air flow outlets for receiving the output air flow.

2. The air pump with an external pressure relief valve according to claim 1, characterized in that: The pressure relief assembly includes a fixed part arranged in the installation section and a movable part arranged in the movable section and abutting the fixed part with an elastic part. The outer diameter of the movable part is larger than the inner diameter of the connection section and smaller than the inner diameter of the installation section, so that the movable part is affected by the pressure change in the air flow channel by the elastic part to have a closed position for closing the connection section and a pressure relief position for allowing the air in the air flow channel to pass through the connection section and be discharged to the outside through the installation hole.

3. The air pump with an external pressure relief valve according to claim 2, wherein: An air stopper is further provided between the movable part and the connecting section to assist in closing the passage of air flow.

4. The air pump with an external pressure relief valve according to claim 3, wherein: The fixing piece is provided with an air vent which connects the installation section with the outside so that the decompressed air flow can be discharged to the outside.

5. The air pump with an external pressure relief valve according to any one of claims 1 to 4, characterized in that: The flow channel seat is located at the air flow outlet and is further provided with at least one first connecting portion for accommodating the air valve.

6. The air pump with an external pressure relief valve according to claim 5, characterized in that: The flow channel seat is further provided with a control circuit board for providing electrical signals to the driving motor and the air valve, and a second connecting portion for accommodating the control circuit board.

7. The air pump with an external pressure relief valve according to claim 6, wherein: The flow channel seat is further provided with a cover body for covering the air valve and the control circuit board. The cover body is provided with at least one output hole for connecting the air valve and one wiring hole for connecting the control circuit board.

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