Noise reduction device for air pump of atomization cooling sprayer

Abstract

The invention belongs to the technical field of air pump fixing devices, and particularly relates to a noise reduction device of an atomization cooling sprayer air pump. An air pump is mounted in the shell; the air pump comprises a motor and a box body, the motor is fixedly installed on the outer surface of the box body, and the output end of the motor drives elements in the box body to move; an air inlet and an air outlet are formed in the outer surface of the box body; a circuit board is fixedly mounted in the shell, and a control unit is mounted on the surface of the circuit board; the end, away from the box body, of the motor and the end, away from the motor, of the box body are sleeved with rubber rings. A cavity is formed in the rubber ring; a silencing device is fixedly mounted on the rubber ring on the box body, and the silencing device is connected with the air inlet and the air outlet in the box body in a sleeving manner; the air pump is simple in structure, mechanical vibration noise generated between the air pump and the shell is reduced by arranging the rubber ring, and airflow noise generated by high-speed flowing airflow at the air inlet and the air outlet is reduced by arranging the silencing device.

Description

Technical Field

[0001] This invention belongs to the technical field of air pump fixing devices, specifically a noise reduction device for an air pump of an atomizing cooling sprayer. Background Technology

[0002] Medical nebulizers are mainly used to treat various diseases of the upper and lower respiratory systems. When in use, the nebulizer cup is connected to the air compressor through a connecting tube. The air pump is used to atomize the liquid medicine in the nebulizer cup into tiny particles. The medicine enters the respiratory tract and lungs through inhalation, thereby achieving the purpose of painless and effective treatment.

[0003] During treatment, the vibration of the air pump itself and the noise generated by the high-speed flow of gas within the confined pump body can easily cause patients to feel unwell. This is especially true for critically ill patients who have undergone tracheotomy and are unable to care for themselves, as well as young children who require nebulization therapy. The noise from medical nebulizers has a greater impact on these patients, easily leading to resistance, reduced treatment effectiveness, and wasted medication. Therefore, how to reduce the noise generated by the air pump during nebulization therapy and reduce patients' resistance is an urgent problem that technicians in this field need to solve.

[0004] In view of this, the present invention proposes a noise reduction device for the air pump of an atomizing cooling sprayer to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a noise reduction device for the air pump of a nebulizer for cooling and atomizing, thus solving the technical problem that the noise generated by the air pump during operation causes patients to have psychological resistance to nebulization therapy.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] This invention proposes a noise reduction device for the air pump of an atomizing cooling sprayer, comprising:

[0008] case;

[0009] An air pump is installed inside the housing;

[0010] The air pump includes a motor and a housing. An impeller is rotatably mounted inside the housing, and a motor is fixedly mounted on the outer surface of the housing. The output end of the motor drives the impeller inside the housing to move, thereby causing changes in airflow. An air inlet and an air outlet are provided on the outer surface of the housing.

[0011] A circuit board is fixedly installed inside the housing, and a control unit is installed on the surface of the circuit board;

[0012] Rubber rings are fitted onto the rear end cover of the motor and the side of the housing away from the motor.

[0013] The rubber ring has a cavity inside.

[0014] Springs, wherein evenly distributed springs are fixedly installed inside the cavity;

[0015] A noise reduction device is fixedly installed on the rubber ring on the housing. The noise reduction device is connected to the air inlet and air outlet on the housing. The noise reduction device is controlled by the control unit on the circuit board. The noise reduction device reduces noise at the air inlet and air outlet.

[0016] Preferably, the silencing device includes:

[0017] A connecting plate, which is fixedly installed on a rubber ring at one end face of the housing;

[0018] A sleeve is fixedly installed on the outer surface of the connecting plate;

[0019] A vibration sensor is fixedly installed inside the cavity, and the vibration sensor is electrically connected to the circuit board;

[0020] A magnetic coil is fixedly installed inside the sleeve, and the magnetic coil is electrically connected to the circuit board.

[0021] The air inlet and outlet of the sleeve correspond to those of the housing; the control unit on the circuit board controls the magnitude of the magnetic field generated by the magnetic coil by receiving the vibration frequency generated by the air pump when it is working, which is sensed by the vibration sensor.

[0022] The magnetic coil is covered with a sheath, and the inside of the sheath is filled with magnetorheological fluid.

[0023] Preferably, the sleeve has a receiving cavity inside, and the magnetic coil is located inside the receiving cavity;

[0024] Preferably, the receiving cavity has uniformly distributed through holes, which are located in the inner ring of the sleeve;

[0025] The through holes are oblique holes located at both ends of the sleeve; the through holes are arched in the receiving cavity; the through holes divert airflow to achieve noise reduction.

[0026] Preferably, the interior of the receiving cavity has uniformly distributed pits.

[0027] Preferably, the cavity consists of two parts: an oil cavity and a sound-absorbing cavity.

[0028] The interior of the oil cavity is filled with lubricating oil;

[0029] The outer wall of the sound-absorbing cavity is provided with evenly distributed sound-absorbing holes.

[0030] Preferably, the cross-section of the sound-absorbing hole is trumpet-shaped; the trumpet-shaped design of the sound-absorbing hole allows noise to enter the interior of the sound-absorbing cavity through the larger end of the sound-absorbing hole and makes it difficult for noise to escape from the sound-absorbing cavity.

[0031] Preferably, the spring is made of plastic material;

[0032] Preferably, the sleeve is filled with carbonyl iron powder;

[0033] Preferably, the outer wall of the rubber ring is coated with a wear-resistant coating; the wear-resistant coating may be GT700, which has a longer lifespan and better resistance to acids and alkalis, heat, wear, impact, and temperature changes compared to traditional and ordinary similar products.

[0034] The beneficial effects of this invention are as follows:

[0035] 1. The noise reduction device for the air pump of the atomizing cooling sprayer of the present invention involves placing a rubber ring on the motor and the housing, so that the oil cavity of the rubber ring contacts the outer surface of the housing and the motor, and then using a housing to encapsulate the motor and the housing; since the rubber sleeve isolates the air pump from the inside of the housing, the cavity inside the rubber sleeve acts as a buffer, thereby avoiding direct contact between the air pump and the housing, and reducing the mechanical vibration noise generated between the air pump and the housing during operation.

[0036] 2. The noise reduction device of the air pump of the atomizing cooling sprayer of the present invention, when the air pump is working, the vibration of the air pump itself is transmitted to the cavity. The vibration sensor inside the cavity transmits the detected vibration frequency of the air pump to the control unit on the circuit board. The control unit outputs current to the magnetic coil according to the detected vibration frequency. After the magnetic coil is energized, the properties of the magnetorheological fluid inside the sheath change (i.e., high viscosity and low flow characteristics), thereby increasing the overall rigidity of the sheath and enhancing the sound insulation effect of the sheath, thereby reducing the airflow noise generated by a large amount of gas flowing at high speed in the air pump. Attached Figure Description

[0037] The invention will now be further described with reference to the accompanying drawings.

[0038] Figure 1 This is an exploded view of the present invention;

[0039] Figure 2 This is a structural diagram of the air pump;

[0040] Figure 3 This is a structural diagram of the rubber ring on the motor;

[0041] Figure 4 This is a structural diagram of the rubber ring on the box;

[0042] Figure 5 This is a structural diagram of the silencer device;

[0043] Figure 6 This is a structural diagram of a magnetic coil.

[0044] In the diagram: 1. Housing; 2. Air pump; 21. Motor; 22. Box; 23. Circuit board; 3. Rubber ring; 4. Cavity; 41. Spring; 42. Oil cavity; 43. Sound absorption cavity; 44. Sound absorption hole; 5. Silencing device; 51. Connecting plate; 52. Sleeve; 53. Vibration sensor; 54. Magnetic coil; 6. Receiving cavity; 61. Through hole; 62. Recess. Detailed Implementation

[0045] This invention provides a noise reduction device for the air pump of a nebulizer cooling sprayer, solving the technical problem that the noise generated by the air pump during operation causes patients to have psychological resistance to nebulizer treatment;

[0046] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0047] Example 1:

[0048] like Figures 1 to 6 As shown:

[0049] The noise reduction device for the air pump of the atomizing cooling sprayer includes:

[0050] Casing 1;

[0051] Air pump 2 is installed inside the housing 1;

[0052] The air pump 2 includes a motor 21 and a housing 22. An impeller is rotatably mounted inside the housing 22, and the motor 21 is fixedly mounted on the outer surface of the housing 22. The output end of the motor 21 drives the impeller inside the housing 22 to move, thereby causing changes in airflow. An air inlet and an air outlet are provided on the outer surface of the housing 22.

[0053] Circuit board 23, a control unit is mounted on the surface of the housing 1;

[0054] Rubber ring 3 is fitted on the rear end cover of the motor 21 and the side end face of the housing 22 away from the motor 21.

[0055] Cavity 4: A cavity 4 is provided inside the rubber ring 3;

[0056] Spring 41, the cavity 4 is fixedly installed with springs 41 evenly distributed;

[0057] Silencing device 5, a silencing device 5 is fixedly installed on the rubber ring 3 on the housing 22;

[0058] The silencing device 5 includes:

[0059] Connecting plate 51, the connecting plate 51 is fixedly installed on the rubber ring 3 on one end face of the housing 22.

[0060] Sleeve 52, the outer surface of the connecting plate 51 is fixedly installed with sleeve 52;

[0061] Vibration sensor 53 is fixedly installed inside the cavity 4, and the vibration sensor 53 is electrically connected to the circuit board 23.

[0062] A magnetic coil 54 is fixedly installed inside the sleeve 52, and the magnetic coil 54 is electrically connected to the circuit board 23.

[0063] in:

[0064] a. The sleeve 52 is fitted onto the air inlet and air outlet of the housing 22; both the sleeve 52 and the connecting plate 51 are made of rubber material.

[0065] b. Vibration sensor 53 is used to sense the vibration frequency generated by air pump 2 when it is working. The control unit on circuit board 23 controls the current magnitude according to the vibration frequency sensed by vibration sensor 53, and then controls the magnitude of the magnetic force generated by magnetic coil 54.

[0066] c. The magnetic coil 54 is covered with a protective sleeve made of rubber material, and the inside of the protective sleeve is filled with magnetorheological fluid.

[0067] d. The sleeve 52 is filled with carbonyl iron powder, which can improve the magnetorheological effect of the magnetic coil 54.

[0068] During operation, the rubber ring 3 is placed on the motor 21 and the housing 22, so that the rubber ring 3 contacts the outer surface of the housing 22 and the motor 21. The sleeve 52 covers the air inlet and air outlet on the housing 22. Then, the housing 1 is used to encapsulate the motor 21 and the housing 22. By setting the rubber ring 3, the air pump 2 does not make direct contact with the housing 1, reducing the mechanical vibration noise generated between the air pump 2 and the housing 1 during operation.

[0069] Meanwhile, when the air pump 2 is working, the vibration of the air pump 2 itself is transmitted to the cavity 4. The vibration sensor 53 inside the cavity 4 transmits the detected vibration frequency of the air pump 2 to the control unit on the circuit board 23. The control unit adjusts the current flowing through the magnetic coil 54 according to the detected vibration frequency. After the magnetic coil 54 is energized, the properties of the magnetorheological fluid inside the sheath change (i.e., high viscosity and low flow characteristics), thereby increasing the overall rigidity of the sleeve 52 and enhancing the sound insulation effect of the sleeve 52, thereby reducing the airflow noise generated by a large amount of gas flowing at high speed in the air pump 2.

[0070] As the output power of the air pump 2 increases, the vibration frequency of the air pump 2 detected by the vibration sensor 53 will also increase, which will increase the current obtained by the magnetic coil 54, thereby increasing the magnetic flux at the magnetic coil 54 and increasing the frequency range of the sound insulation of the sleeve 52.

[0071] Example 2:

[0072] like Figure 5 As shown:

[0073] Unlike implementation one:

[0074] The sleeve 52 has a receiving cavity 6 inside, and the magnetic coil 54 is located inside the receiving cavity 6;

[0075] The receiving cavity 6 is provided with uniformly distributed through holes 61, which are located in the inner ring of the sleeve 52.

[0076] in:

[0077] a. Through hole 61 is an oblique hole, located at both ends of sleeve 52;

[0078] b. The through hole 61 is arched in the receiving cavity 6; the through hole 61 diverts the airflow to achieve the effect of noise reduction.

[0079] c. The interior of the receiving cavity 6 has evenly distributed pits 62.

[0080] During operation, when the airflow enters the sleeve 52 from the air outlet on the housing 22, a portion of the airflow enters the cavity 6 through the through hole 61 at the end of the sleeve 52 near the connecting plate 51. After entering the cavity 6, the airflow collides with the pit 62 and the magnetic coil 54 in the cavity 6, thereby canceling the kinetic energy of the airflow and reducing the flow rate of the airflow entering the cavity 6, thus achieving the purpose of noise reduction. Afterwards, the airflow is discharged from the cavity 6 through the through hole 61 at the end of the sleeve 52 away from the connecting plate 51, thereby achieving the purpose of diversion and noise reduction.

[0081] When the airflow enters the air inlet on the housing 22 through the sleeve 52, the same applies.

[0082] Example 3:

[0083] like Figures 3 to 4 As shown:

[0084] The cavity 4 consists of two parts: an oil cavity 42 and a sound-absorbing cavity 43.

[0085] The interior of the oil cavity 42 is filled with lubricating oil;

[0086] The outer wall of the sound-absorbing cavity 43 is provided with evenly distributed sound-absorbing holes 44.

[0087] in:

[0088] a. The rubber ring 3 is interference-fitted with the outer surfaces of the motor 21 and the housing 22; the outer wall of the rubber ring 3 is coated with a wear-resistant coating; the wear-resistant coating can be GT700, which has a longer lifespan and better resistance to acids and alkalis, heat resistance, wear resistance, impact resistance and temperature change resistance compared to traditional and ordinary similar products.

[0089] b. The cross-section of the sound-absorbing hole 44 is trumpet-shaped; the trumpet-shaped design of the sound-absorbing hole 44 allows noise to enter the interior of the sound-absorbing cavity 43 through the large end of the sound-absorbing hole 44 and makes it difficult for noise to escape from the sound-absorbing cavity 43.

[0090] After the atomizer is turned on, the interior of the housing 1 will be filled with the noise generated by the air pump 2. The noise enters the interior of the sound absorption chamber 43 through the sound absorption hole 44 on the rubber ring 3. At this time, the sound absorption chamber 43 is equivalent to a perforated plate sound absorption structure. Since the sound absorption hole 44 is funnel-shaped, it is easy for sound waves to enter but difficult to leave, making it difficult for sound waves to escape after entering the sound absorption chamber 43. After the sound enters the interior of the sound absorption chamber 43 through the sound absorption hole 44, it excites the air inside the sound absorption chamber 43 to resonate, so that the sound energy is converted into heat energy, thereby achieving the purpose of sound absorption and noise reduction.

[0091] Pure lubricating oil is filled inside the oil cavity 42 to cool down the heat generated inside the sound absorption cavity 43, thereby reducing the situation where the heat in the sound absorption cavity 43 cannot be released after the rubber ring 3 covers the air pump 2, which may lead to the air pump 2 overheating.

[0092] The specific heat capacity of water is 4.2 × 10³ J / (kg℃), and that of oil is 1.87-1.88 × 10³ J / (kg℃). Although, according to the heat absorption formula: Qabsorbed = cm(t-t0) and the heat release formula: Qreleased = cm(t0-t), water has a higher heat absorption efficiency than oil within the same unit time. However, the possibility of damage to the oil cavity 42 during use cannot be ruled out due to the rubber ring 3. If the oil cavity 42 is damaged, internal lubricating oil may flow out from the damaged area and enter... Inside the housing 1, because pure lubricating oil has a certain degree of insulation, even if the lubricating oil flows out from the damaged area, it will not cause a short circuit in the internal circuit of the housing 1. If the oil cavity 42 is filled with water, it is very easy to cause a short circuit after the water flows out from the damaged area. At the same time, the water will also cause some corrosion to the electrical components inside the housing 1, which will increase the difficulty of subsequent repairs. Therefore, in this design, pure lubricating oil is chosen to be filled inside the oil cavity 42, instead of water.

Claims

1. A noise reduction device for the air pump of an atomizing cooling sprayer, including: Shell (1); An air pump (2) is installed inside the housing (1); The air pump (2) includes a motor (21) and a housing (22). An impeller is rotatably mounted inside the housing (22), and the motor (21) is fixedly mounted on the outer surface of the housing (22). The output end of the motor (21) drives the impeller inside the housing (22) to move, thereby causing changes in airflow. An air inlet and an air outlet are provided on the outer surface of the housing (22). Circuit board (23), the circuit board (23) is fixedly installed inside the housing (1), and a control unit is installed on the surface of the circuit board (23); Rubber rings (3) are fitted on the rear end cover of the motor (21) and the side end face of the housing (22) away from the motor (21); Its features are: Cavity (4), the inside of the rubber ring (3) is provided with cavity (4); Springs (41), evenly distributed springs (41) are fixedly installed inside the cavity (4); A silencing device (5) is fixedly installed on the rubber ring (3) on the housing (22). The silencing device (5) is connected to the air inlet and the air outlet on the housing (22). The silencing device (5) is controlled by the control unit on the circuit board (23). The silencing device (5) reduces noise at the air inlet and the air outlet.

2. The noise reduction device for the air pump of the atomizing cooling sprayer according to claim 1, characterized in that: The silencing device (5) includes A connecting plate (51) is fixedly installed on a rubber ring (3) on one side end face of the housing (22); Sleeve (52), the outer surface of the connecting plate (51) is fixedly installed with sleeve (52); Vibration sensor (53), a vibration sensor (53) is fixedly installed inside the cavity (4), and the vibration sensor (53) is electrically connected to the circuit board (23); A magnetic coil (54) is fixedly installed inside the sleeve (52), and the magnetic coil (54) is electrically connected to the circuit board (23).

3. The noise reduction device for the air pump of the atomizing cooling sprayer according to claim 2, characterized in that: The sleeve (52) has a receiving cavity (6) inside, and the magnetic coil (54) is located inside the receiving cavity (6).

4. The noise reduction device for the air pump of the atomizing cooling sprayer according to claim 3, characterized in that: The receiving cavity (6) is provided with uniformly distributed through holes (61), which are located in the inner ring of the sleeve (52).

5. The noise reduction device for the air pump of the atomizing cooling sprayer according to claim 3, characterized in that: The interior of the receiving cavity (6) is provided with evenly distributed pits (62).

6. The noise reduction device for the air pump of the atomizing cooling sprayer according to claim 1, characterized in that: The cavity (4) consists of two parts: an oil cavity (42) and a sound-absorbing cavity (43); The interior of the oil cavity (42) is filled with lubricating oil; The sound-absorbing cavity (43) has evenly distributed sound-absorbing holes (44) on its outer wall.

7. The noise reduction device for the air pump of the atomizing cooling sprayer according to claim 6, characterized in that: The cross-section of the sound-absorbing hole (44) is trumpet-shaped.

8. The noise reduction device for the air pump of the atomizing cooling sprayer according to claim 1, characterized in that: The spring (41) is made of plastic material.

9. The noise reduction device for the air pump of the atomizing cooling sprayer according to claim 2, characterized in that: The sleeve (52) is filled with carbonyl iron powder.

10. The noise reduction device for the air pump of the atomizing cooling sprayer according to claim 1, characterized in that: The outer wall of the rubber ring (3) is coated with a wear-resistant coating.

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