Noise reduction structure of intermittent pneumatic pressure therapeutic apparatus

Abstract

The utility model discloses a noise reduction structure of an intermittent pneumatic pressure therapeutic apparatus, the intermittent pneumatic pressure therapeutic apparatus comprises a housing and an electromagnetic pump arranged in the housing, and the outside of the electromagnetic pump is wrapped with a damping assembly composed of a first damping cover and a second damping cover. A gas inlet of the electromagnetic pump is communicated with a gas input pipe, a silencer is arranged at the tail end, away from the electromagnetic pump, in the gas input pipe, one end of the silencer is provided with a gas outlet nozzle connected with the gas input pipe, and the other end of the silencer is provided with a gas inlet nozzle communicated with the gas outlet nozzle; the outer portion of the air inlet nozzle is sleeved with first silencing cotton, the outer portion of the silencer is further provided with second silencing cotton arranged on the outer portion of the first silencing cotton in a sleeving mode, and a cavity is formed between the periphery of the end, away from the silencer, of the first silencing cotton and the inner wall of the second silencing cotton. The noise reduction structure disclosed by the utility model can effectively reduce the vibration of the equipment and reduce the noise generated by the equipment at the same time.

Description

A noise reduction structure for an intermittent pneumatic pressure therapy device Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a noise reduction structure for an intermittent pneumatic pressure therapy device. Background Technology

[0002] Currently, most pneumatic pressure therapy devices are used as the main equipment for intermittent pneumatic pressure therapy. However, the vibration and noise generated by existing pneumatic pressure therapy devices during operation have been a problem that has plagued patients and medical institutions.

[0003] The main noise-generating components of a pneumatic pressure therapy device are the electromagnetic pump and the electromagnetic valve assembly. The electromagnetic pump, as the air source generator, is the main noise-generating component. It generates noise during the intake of air and also produces significant vibration during operation, which also generates noise. The electromagnetic valve assembly, as the air source control output device, lacks proper noise reduction treatment at its exhaust port, resulting in noticeable noise during exhaust and degassing. Furthermore, the bottom of the pneumatic pressure therapy device's casing is usually made of soft rubber as feet. While soft rubber can reduce vibration, it is not very effective at reducing the noise generated by the device's vibration. Summary of the Invention

[0004] The purpose of this invention is to overcome the existing technical defects and provide a noise reduction structure for an intermittent pneumatic pressure therapy device, which can effectively reduce equipment vibration and reduce the noise it generates.

[0005] To solve the above-mentioned technical problems, this utility model provides a noise reduction structure for an intermittent pneumatic pressure therapy device. The intermittent pneumatic pressure therapy device includes a shell and an electromagnetic pump disposed inside the shell. The electromagnetic pump is surrounded by a shock-absorbing assembly consisting of a first shock-absorbing cover and a second shock-absorbing cover. A gas input pipe is connected to the air inlet of the electromagnetic pump. A silencer is provided at the end of the gas input pipe away from the electromagnetic pump. One end of the silencer is provided with an air outlet connected to the gas input pipe. The other end of the silencer is provided with an air inlet connected to the air outlet. A first sound-absorbing cotton is fitted outside the air inlet. A second sound-absorbing cotton is also provided at one end of the silencer, fitted outside the first sound-absorbing cotton. A cavity is formed between the outer periphery of the first sound-absorbing cotton away from the silencer and the inner wall of the second sound-absorbing cotton.

[0006] Furthermore, the first sound-absorbing cotton is made of nano foam, the second sound-absorbing cotton is made of expanded foam, and the pore size of the second sound-absorbing cotton is larger than that of the first sound-absorbing cotton.

[0007] Furthermore, the muffler includes a housing with an internal gas flow chamber and sound-absorbing cotton disposed within the gas flow chamber. The two ends of the housing are respectively provided with an air inlet and an air outlet communicating with the gas flow chamber.

[0008] Furthermore, both the first and second shock absorber covers are made of foam plastic.

[0009] Furthermore, the first shock absorber is a semi-enclosed structure with a semi-circular inner cavity. The top surface, bottom surface, and arc-shaped inner wall of the semi-circular inner cavity are all provided with a plurality of first shock absorber ribs that abut against the outer wall of the electromagnetic pump. The rear end of the first shock absorber and the front end of the second shock absorber are both provided with a plurality of second shock absorber ribs that abut against the inner wall of the outer shell. The bottom of the first shock absorber is recessed and provided with a third shock absorber rib that abuts against the inner bottom surface of the outer shell.

[0010] Furthermore, the housing is also equipped with a solenoid valve group consisting of multiple solenoid valves, the air inlet of the solenoid valve group is connected to the air outlet of the solenoid pump through a pipeline; a third sound-absorbing cotton is provided at the exhaust port of the solenoid valve group.

[0011] Furthermore, the housing also includes an air tank and a circuit board. The circuit board has two pressure sensors. The outlet of the electromagnetic pump is connected to the inlet of the air tank via a first pipe. The outlet of the air tank is connected to the first port of a four-way valve via a second pipe. A one-way valve is provided on the second pipe. The second and third ports of the four-way valve are connected to the two pressure sensors via a third and a fourth pipe, respectively. The fourth port of the four-way valve is connected to the inlet of the electromagnetic valve assembly via a fifth pipe.

[0012] Furthermore, at least one air nozzle seat is fixedly provided at the rear end of the housing by a fixing bracket. The air nozzle seat is provided with multiple air nozzles that are connected to the air outlets of the solenoid valve assembly one by one through the sixth pipeline. The solenoid valve assembly is fixed on the fixing bracket and located in front of the air nozzle seat. A space for accommodating the third sound-absorbing cotton is formed between the exhaust port at the rear end of the solenoid valve assembly and the air nozzle seat.

[0013] Furthermore, the outer shell includes a front shell and a rear shell. The inner bottom of both the front and rear shells are provided with at least two threaded posts that are connected front and rear. The bottom of the first shock absorber is recessed at the position corresponding to one of the threaded posts for it to pass through. The second shock absorber is located at the upper end of the threaded post, and the bottom of the second shock absorber is provided with a plurality of fourth shock-absorbing ribs that abut against the threaded post. The inner side of the upper end of the rear shell is provided with at least one first positioning post that presses against the upper end of the first shock absorber. The inner side of the lower end of the rear shell is also provided with at least one second positioning post located on one side of the first shock absorber. The other side of the first shock absorber abuts against the inner wall of the rear shell. The fixing bracket is fixed to the upper end of the rear shell, and the circuit board and the gas tank are fixed to the front shell.

[0014] Furthermore, the bottom of the outer casing is also provided with multiple foot pads made of foam material.

[0015] This utility model has the following beneficial effects:

[0016] First, a silencer is installed at the air inlet of the electromagnetic pump, and a first sound-absorbing cotton and a second sound-absorbing cotton are sequentially fitted outside the air inlet of the silencer. This allows the air to pass through the second and first sound-absorbing cottons in sequence when entering the silencer, thereby using the two sound-absorbing cottons to reduce or eliminate the noise problem caused by high-frequency failure at the air inlet of the silencer. If a silencer is only installed at the air inlet of the electromagnetic pump, the internal cavity diameter of the silencer is larger than the diameter of its air inlet end, and the sound waves propagating at its air inlet end (narrow beam) do not come into contact with the sound-absorbing material inside the silencer, causing low frequencies to shift to high frequencies, resulting in high-frequency failure and noise generation. Therefore, the noise reduction effect of installing a silencer alone is not good.

[0017] Secondly, by encasing the electromagnetic pump with shock-absorbing components, the vibration of the electromagnetic pump can be effectively reduced, further reducing the noise generated by the vibration of the equipment. Moreover, the shock-absorbing components are made of foamed materials (such as foam plastic), which can absorb the sound generated when the electromagnetic pump is working, thereby reducing noise while reducing vibration, which is more effective in reducing noise. Furthermore, the shock-absorbing components are equipped with several shock-absorbing ribs that cooperate with the electromagnetic pump and the outer shell, which can better achieve the shock absorption effect of the electromagnetic pump and reduce the vibration energy transmitted from the electromagnetic pump to the outer shell.

[0018] In addition, sound-absorbing cotton is also provided at the exhaust port of the solenoid valve assembly, so that the gas ejected from the exhaust port of the solenoid valve assembly during exhaust and venting will pass through the sound-absorbing cotton to reduce the noise of the pressurized gas ejected from the solenoid valve assembly; and multiple feet made of foam material are provided at the bottom of the housing, which can effectively reduce or eliminate the vibration noise generated by the vibration of the whole machine.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 is a schematic diagram of the intermittent pneumatic pressure therapy device in the embodiment;

[0022] Figure 2 is a side sectional view of the intermittent pneumatic pressure therapy device in the embodiment;

[0023] Figure 3 is a front sectional view of the intermittent pneumatic pressure therapy device in the embodiment;

[0024] Figure 4 is a half-sectional view of the intermittent pneumatic pressure therapy device in the embodiment;

[0025] Figure 5 is a half-sectional view of the intermittent pneumatic pressure therapy device in the embodiment from another perspective;

[0026] Figure 6 is a schematic diagram of the internal structure of the intermittent pneumatic pressure therapy device in the embodiment.

[0027] Figure 7 is a schematic diagram of Figure 6 after removing the solenoid valve assembly and the air nozzle seat;

[0028] Figure 8 is a cross-sectional view of the muffler combined with the two sound-absorbing cottons in the embodiment;

[0029] Figure 9 is a schematic diagram of the first shock absorber in the embodiment;

[0030] Figure 10 is a schematic diagram of the first shock absorber from another perspective in the embodiment;

[0031] Figure 11 is a schematic diagram of the second shock absorber in the embodiment;

[0032] Figure 12 is a schematic diagram of the second shock absorber from another perspective in the embodiment;

[0033] Figure 13 is an exploded view of the solenoid valve assembly, the nozzle seat and the fixing frame in the embodiment. Detailed Implementation

[0034] To better understand the technical content of this utility model, the following will further introduce and explain this utility model in conjunction with the accompanying drawings and specific embodiments. It should be noted that if there are descriptions such as "first" and "second" in the text, they are used to distinguish different components, etc., and do not represent the order of priority, nor do they limit "first" and "second" to be different types.

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0036] Example

[0037] As shown in Figures 1 to 13, the noise reduction structure of the intermittent pneumatic pressure therapy device in this embodiment includes a housing 1 and an electromagnetic pump 2 disposed within the housing 1 for generating and delivering gas. The electromagnetic pump 2 is externally encased in a shock-absorbing assembly consisting of a first shock-absorbing cover 21 and a second shock-absorbing cover 22. Encasing the electromagnetic pump with this shock-absorbing assembly effectively reduces its vibration, further reducing noise generated by vibration. A gas input pipe 23 is connected to the air inlet of the electromagnetic pump 2. A silencer 3 is connected to the end of the gas input pipe 23 furthest from the electromagnetic pump 2. One end of the silencer 3 has an outlet 31 connected to the gas input pipe 23. The other end of the muffler 3 is provided with an air inlet 32 ​​that communicates with the air outlet 31. The air inlet 32 ​​is covered with a first sound-absorbing cotton 33. The air inlet end of the muffler 3 is also provided with a second sound-absorbing cotton 34 that is covered with the first sound-absorbing cotton 33, so that both the first sound-absorbing cotton and the second sound-absorbing cotton 34 are formed into a cap-shaped structure, so that when the air enters the muffler, it first passes through the second sound-absorbing cotton and the first sound-absorbing cotton in sequence. In this way, the two sound-absorbing cottons are used to reduce or eliminate the noise problem caused by high-frequency failure at the air inlet of the muffler. Furthermore, a cavity 37 is formed between the outer periphery of the end of the first sound-absorbing cotton 33 away from the muffler 3 and the inner wall of the second sound-absorbing cotton 34. This cavity can further eliminate the problem of high-frequency failure at the air inlet.

[0038] In one embodiment, both the first damping cover 21 and the second damping cover 22 are made of foam plastic. Utilizing the properties of foam material, it can absorb the sound generated when the electromagnetic pump is working, thereby reducing vibration and noise, which is more effective in reducing noise.

[0039] In one embodiment, the first sound-absorbing cotton 33 is made of nano foam, and the second sound-absorbing cotton is made of foamed cotton. That is, both the first sound-absorbing cotton 33 and the second sound-absorbing cotton 34 are provided with air holes for gas flow, and the pore diameter of the second sound-absorbing cotton 34 is larger than that of the first sound-absorbing cotton 33, thereby forming a gas flow channel with progressively smaller pore diameters at the air inlet end, which can further reduce the intake noise.

[0040] In another embodiment, as shown in FIG8, the muffler 3 includes a housing 35 having a gas flow chamber 30 inside and a sound-absorbing cotton 36 disposed in the gas flow chamber 30. The two ends of the housing 35 are respectively provided with an air inlet 32 ​​and an air outlet 31 communicating with the gas flow chamber 20.

[0041] In one embodiment, as shown in Figures 2 to 12, the first damping cover 21 is a semi-enclosed structure with a semi-circular inner cavity 24. The rear half of the electromagnetic pump 2 is placed inside the semi-circular inner cavity 24. The top surface, bottom surface, and arc-shaped inner wall of the semi-circular inner cavity 24 are all provided with a plurality of first damping ribs 25 that abut against the outer wall of the electromagnetic pump 2, so that the electromagnetic pump 2 is suspended and can achieve a better damping effect on the electromagnetic pump. The front end of the second damping cover 22 and the rear end of the first damping cover 21 are respectively provided with a plurality of second damping ribs 26 that abut against the front and rear inner walls of the outer shell 1. The bottom of the first damping cover 21 is recessed and provided with a third damping rib 27 that abuts against the inner bottom surface of the outer shell 1, so that a soft contact is formed between the damping component and the outer shell, reducing the vibration transmission effect between the damping component and the outer shell, and further improving the damping effect.

[0042] In one embodiment, as shown in Figures 6 and 13, the outer casing 1 is further provided with a solenoid valve group 4 consisting of multiple solenoid valves connected in parallel. Each solenoid valve group 4 has an air outlet 41 at the position corresponding to each solenoid valve, that is, the number of air outlets is the same as the number of solenoid valves. Each solenoid valve is used to control whether its corresponding air outlet is opened or closed. The solenoid valves on the solenoid valve group 4 share a common air inlet. The air inlet 43 of the solenoid valve group 4 is connected to the air outlet of the solenoid pump 2 through a pipeline. A third sound-absorbing cotton 44 is provided at the exhaust port 42 at the rear end of the solenoid valve group 4.

[0043] In one embodiment, as shown in Figures 1 to 13, two air nozzle seats 6 are fixedly mounted on the rear end of the outer casing 1 by a fixing frame 5. Each of the two air nozzle seats 6 is provided with multiple air nozzles 61 exposed to the outside. The multiple air nozzles are connected to the air outlets 41 on the solenoid valve assembly 4 one-to-one through the sixth pipe 62, that is, the number of air nozzles 61 is the same as the number of air outlets 41 on the solenoid valve assembly 4. The solenoid valve assembly 4 is fixed on the fixing frame 5 and located in front of the air nozzle seats 6. A space for accommodating the third sound-absorbing cotton 44 is formed between the exhaust port 42 at the rear end of the solenoid valve assembly 4 and the air nozzle seat 6.

[0044] In one embodiment, the third sound-absorbing cotton 44 is made of nano foam or expanded foam.

[0045] In one embodiment, as shown in Figures 4 to 7, the outer casing 1 is further provided with a gas storage tank 7 and a circuit board 8. The circuit board 8 is provided with two pressure sensors 81. The outlet of the electromagnetic pump 2 is connected to the inlet of the gas storage tank 7 through a first pipeline 63. The outlet of the gas storage tank 7 is connected to the first port of the four-way valve 9 through a second pipeline 64. A one-way valve 65 is provided on the second pipeline 64. The second and third ports of the four-way valve 9 are connected to the two pressure sensors 81 through a third pipeline 66 and a fourth pipeline 67, respectively, for measuring the gas pressure transmitted in the pipeline. The fourth port of the four-way valve 9 is connected to the inlet 43 of the electromagnetic valve group 4 through a fifth pipeline 68.

[0046] In one embodiment, as shown in Figures 2 to 9, the outer shell 1 includes a front shell 10 and a rear shell 11. Both the front shell 10 and the rear shell 11 have two threaded posts 12 that are connected front-to-back and distributed left-to-right on their inner bottom sides. The bottom of the first shock absorber 21 has a positioning groove 29 recessed at the position corresponding to the left threaded post 12 for it to pass through. The second shock absorber 22 is located at the upper end of the left threaded post 12 to support and limit the electromagnetic pump using the threaded post. The bottom of the second shock absorber 21 has a protrusion with multiple fourth shock-absorbing ribs 211 that abut against the threaded post. The upper inner side of the rear shell 11 has a protrusion... There is at least one first positioning post 13 pressing on the upper end of the first shock absorber 21, and at least one second positioning post 14 protruding from the lower inner side of the rear shell 11 located on the right side of the first shock absorber 21. The other side of the first shock absorber 21 abuts against the inner wall of the rear shell 11, thereby using the threaded post and the two positioning posts to form a positioning assembly and limit of the shock absorber and the electromagnetic pump, reducing the problem of large vibration transmission caused by the screw fixing between the electromagnetic pump and the shell, and further improving the shock absorption effect; the fixing bracket 5 is fixed to the upper end of the rear shell 11, and the circuit board 8 and the air tank 7 are fixed to the front shell 10.

[0047] In one embodiment, as shown in Figures 2 to 5, the bottom of the outer casing 1 is also provided with a plurality of foot pads 15 made of foam material. By utilizing the properties of foam material, vibration noise generated by the vibration of the whole machine can be effectively reduced or eliminated.

[0048] In other embodiments, an air pump may be used instead of an electromagnetic pump.

[0049] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A noise reduction structure for an intermittent pneumatic pressure therapy device, the intermittent pneumatic pressure therapy device comprising a housing and an electromagnetic pump disposed within the housing, characterized in that, The electromagnetic pump is externally encased in a shock-absorbing assembly consisting of a first shock-absorbing cover and a second shock-absorbing cover. A gas input pipe is connected to the air inlet of the electromagnetic pump. A silencer is provided at the end of the gas input pipe away from the electromagnetic pump. One end of the silencer is provided with an air outlet connected to the gas input pipe, and the other end of the silencer is provided with an air inlet connected to the air outlet. A first sound-absorbing cotton is fitted outside the air inlet. A second sound-absorbing cotton is also fitted outside the first sound-absorbing cotton, and a cavity is formed between the outer periphery of the first sound-absorbing cotton away from the silencer and the inner wall of the second sound-absorbing cotton.

2. The noise reduction structure of the intermittent pneumatic compression therapy apparatus according to claim 1, wherein, The first sound-absorbing cotton is made of nano foam, the second sound-absorbing cotton is made of expanded foam, and the pore size of the second sound-absorbing cotton is larger than that of the first sound-absorbing cotton.

3. The noise reduction structure of the intermittent pneumatic compression therapy apparatus according to claim 1 or 2, characterized in that, The silencer includes a housing with an internal gas flow chamber and sound-absorbing cotton disposed inside the gas flow chamber. The housing has an air inlet and an air outlet respectively communicating with the gas flow chamber at both ends.

4. The noise reduction structure of the intermittent pneumatic compression therapy apparatus according to claim 3, wherein, Both the first and second shock absorbers are made of foam plastic.

5. The noise reduction structure of the intermittent pneumatic pressure therapy device as described in claim 4, characterized in that, The first shock absorber is a semi-enclosed structure with a semi-circular inner cavity. The top surface, bottom surface and arc-shaped inner wall of the semi-circular inner cavity are provided with a number of first shock absorber ribs that abut against the outer wall of the electromagnetic pump. The rear end of the first shock absorber and the front end of the second shock absorber are provided with a number of second shock absorber ribs that abut against the inner wall of the outer shell. The bottom of the first shock absorber is recessed and provided with a third shock absorber rib that abuts against the inner bottom surface of the outer shell.

6. The noise reduction structure of the intermittent pneumatic compression therapy apparatus according to claim 5, wherein, The housing is also equipped with a solenoid valve group consisting of multiple solenoid valves. The air inlet of the solenoid valve group is connected to the air outlet of the solenoid pump through a pipeline. A third sound-absorbing cotton is provided at the exhaust port of the solenoid valve group.

7. The noise reduction structure of the intermittent pneumatic compression therapy apparatus according to claim 6, wherein, The housing also includes an air tank and a circuit board. The circuit board has two pressure sensors. The outlet of the electromagnetic pump is connected to the inlet of the air tank through a first pipeline. The outlet of the air tank is connected to the first port of a four-way valve through a second pipeline. A one-way valve is installed on the second pipeline. The second and third ports of the four-way valve are connected to the two pressure sensors through a third and a fourth pipeline, respectively. The fourth port of the four-way valve is connected to the inlet of the electromagnetic valve assembly through a fifth pipeline.

8. The noise reduction structure of the intermittent pneumatic compression therapy apparatus according to claim 7, wherein, At least one air nozzle seat is fixedly mounted on the rear end of the housing via a fixing bracket. The air nozzle seat is provided with multiple air nozzles that are connected to the air outlets of the solenoid valve assembly through a sixth pipeline. The solenoid valve assembly is fixed on the fixing bracket and located in front of the air nozzle seat. A space for accommodating the third sound-absorbing cotton is formed between the exhaust port at the rear end of the solenoid valve assembly and the air nozzle seat.

9. The noise reduction structure of the intermittent pneumatic compression therapy apparatus according to claim 8, wherein, The outer casing includes a front shell and a rear shell. Both the front and rear shells have at least two corresponding threaded posts at their inner bottom. The bottom of the first shock absorber has a positioning groove at the position corresponding to one of the threaded posts, allowing it to pass through. The second shock absorber is located at the upper end of the threaded post, and its bottom has a plurality of fourth shock-absorbing ribs that abut against the threaded post. The upper inner side of the rear shell has at least one first positioning post that presses against the upper end of the first shock absorber. The lower inner side of the rear shell also has at least one second positioning post located on one side of the first shock absorber. The other side of the first shock absorber abuts against the inner wall of the rear shell. The fixing bracket is fixed to the upper end of the rear shell, and the circuit board and gas tank are fixed to the front shell.

10. The noise reduction structure of the intermittent pneumatic compression therapy apparatus according to claim 9, wherein, The bottom of the outer casing is also provided with multiple foot pads made of foam material.

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