A stabilization and noise reduction structure for a ventilator

Abstract

This utility model discloses a flow stabilization and noise reduction structure for a ventilator. The ventilator includes a ventilator base (2) with an air inlet (2.1) on it; it also includes a first air inlet channel (8) and a second air inlet channel (9); the first air inlet channel (8) is connected to the air inlet (2.1); the first air inlet channel (8) is stacked above the second air inlet channel (9), and one end of the first air inlet channel (8) away from the air inlet (2.1) is connected to the second air inlet channel (9); the ventilator base (2) is provided with a guide strip (2.2), which is located inside the second air inlet channel (9) and extends from the side wall of the ventilator base (2) towards the air inlet direction. This utility model significantly reduces airflow turbulence by providing guide strips and guide columns, which is beneficial for reducing noise.

Description

Technical Field

[0001] This utility model relates to a flow stabilization and noise reduction structure for a ventilator, belonging to the field of ventilator technology. Background Technology

[0002] In modern clinical medicine, ventilators, as an effective means of artificially replacing spontaneous ventilation, are widely used in respiratory failure caused by various reasons, anesthetic respiratory management during major surgery, respiratory support therapy, and emergency resuscitation, occupying a very important position in the field of modern medicine. A ventilator is a crucial medical device that can prevent and treat respiratory failure, reduce complications, and save and prolong patients' lives.

[0003] Most existing ventilators assist patients' breathing by using a fan to move air. However, existing ventilators generate significant vibration and noise during use, affecting patient experience, especially with smaller ventilators. Utility Model Content

[0004] In order to reduce the noise generated by the airflow inside the ventilator and improve the user experience, the present invention provides a flow stabilization and noise reduction structure, the specific technical solution of which is as follows.

[0005] A flow stabilization and noise reduction structure for a ventilator, the ventilator including a ventilator base, the ventilator base being provided with an air inlet; characterized in that it further includes a first air inlet channel and a second air inlet channel;

[0006] The first air inlet channel is connected to the air inlet; the first air inlet channel is stacked above the second air inlet channel, and the end of the first air inlet channel away from the air inlet is connected to the second air inlet channel;

[0007] The ventilator base is provided with a guide strip, which is located in the second air inlet channel and extends from the side wall of the ventilator base in the air inlet direction.

[0008] Furthermore, three guide strips are arranged in parallel, with the middle guide strip being higher than the guide strips on both sides.

[0009] Furthermore, a vertically extending guide column is also provided in the second air inlet channel, the guide column being located directly below the air resistance pipe; the guide column includes a baffle, a first guide vane and a second guide vane; the first guide vane is fixed to the side of the baffle facing the air inlet direction, and the second guide vane is fixed to the side of the baffle away from the air inlet direction.

[0010] Furthermore, several of the first guide vanes are arranged in parallel, and several of the second guide vanes are arranged radially.

[0011] Furthermore, the number of the first guide vanes is greater than the number of the second guide vanes.

[0012] Compared with the prior art, this invention significantly reduces airflow turbulence by setting guide strips and guide columns, which helps to reduce noise. Attached Figure Description

[0013] Figure 1 This is an exploded view of the ventilator of this utility model;

[0014] Figure 2 This is a schematic diagram of the ventilator base;

[0015] Figure 3 yes Figure 2 Enlarged view of region A in the middle;

[0016] Figure 4 This is a bottom view of the wind turbine nacelle cover;

[0017] Figure 5 This is a longitudinal cross-sectional view of the ventilator;

[0018] Figure 6 yes Figure 5 A schematic diagram of airflow in cross-sectional view;

[0019] Figure 7 This is another longitudinal cross-sectional view of the ventilator;

[0020] Figure 8 This is a schematic diagram of airflow in a cross-sectional view of a ventilator.

[0021] Figure 9 This is a velocity contour map of the airway cross section when the three guide strips are at the same height;

[0022] Figure 10 This is a velocity contour map of the airway cross section when the middle guide bar is higher;

[0023] Figure 11 This is a turbulent kinetic energy cloud diagram of the air passage cross-section when the three guide strips are at the same height.

[0024] Figure 12 This is a turbulent kinetic energy cloud diagram of the air passage cross-section when the middle guide bar is higher;

[0025] Figure 13 This is a turbulent kinetic energy cloud diagram of the axial cross-section of a drag duct without a guide column;

[0026] Figure 14 It is a turbulent kinetic energy cloud diagram of the axial cross section of the wind resistance pipe using a guide column.

[0027] In the diagram: 1. Ventilator top cover; 2. Ventilator base; 2.1. Air inlet; 2.2. Guide strip; 3. Humidifier; 4. Fan assembly; 5. Fan compartment top cover; 6. Guide column; 6.1. Baffle; 6.2. First guide vane; 6.3. Second guide vane; 7. Air resistance tube; 8. First air inlet channel; 9. Second air inlet channel; 9. First part; 9.1. Second part; 9.2. Transition chamber; 10. Fan compartment chamber; 11. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] See Figures 1-8 The ventilator includes a ventilator cover 1, a ventilator base 2, and a humidifier 3. A fan assembly 4 and a fan chamber cover 5 are disposed between the ventilator cover 1 and the ventilator base 2.

[0030] The ventilator base 2 is provided with an air inlet 2.1. The air intake channel of the ventilator includes a first air intake channel 8 and a second air intake channel 9, a transition chamber 10 and a fan chamber 11.

[0031] The first air inlet channel 8 is connected to the air inlet 2.1; the first air inlet channel 8 is stacked above the second air inlet channel 9, and the end of the first air inlet channel 8 away from the air inlet 2.1 is connected to the second air inlet channel 9; the second air inlet channel 9 includes a first part 9.1 and a second part 9.2 arranged in an L-shape;

[0032] The transition chamber 10 is located above the second air inlet channel 9, and the transition chamber 10 and the second air inlet channel 9 are connected by a vertically arranged air resistance pipe 7; the fan compartment chamber 11 is connected to the transition chamber 10; wherein, the air resistance pipe 7 is a conventional component in the ventilator, and an air resistance plate (not shown) is usually installed inside the air resistance pipe 7.

[0033] like Figure 5 , Figure 7 As shown, the ventilator base 2 is provided with a guide strip 2.2, which is located within the first part 9.1 of the second air inlet channel 9. The guide strip 2.2 extends from the side wall of the ventilator base 2 towards the air inlet direction, which refers to the direction of airflow in the second air inlet channel 9. Preferably, three guide strips 2.2 are arranged in parallel, with the middle guide strip 2.2 being higher than the two side guide strips 2.2. The purpose is to make the airflow velocity at the outlet of the three guide strips 2.2 similar, avoiding excessive velocity differences that could cause airflow separation and generate new noise sources. Figure 9 The velocity contour plot of the airway cross section at the same height is shown in Figure 2.2 for three guide vanes. Figure 10 The velocity contour plot of the airway section at a higher height in the middle of guide strip 2.2; from Figure 9It can be observed that the airflow velocity in the right air intake is significantly higher than that in the left air intake when the guide bar is of equal height. However, in the air intake cross-section with the middle guide bar heightened design, the velocity difference between the four air intakes is very small. Figure 10 As shown. Figure 11 This is a turbulent kinetic energy cloud map of the air passage cross-section using a guide vane with equal height design. Figure 12 By using the design of raising the middle guide strip in the cross-section of the air passage turbulent kinetic energy cloud diagram, a significant decrease in turbulent kinetic energy can be observed.

[0034] In a preferred embodiment, such as Figure 2 , Figure 3 As shown, a vertically extending guide column 6 is also provided in the second part 9.2 of the second air inlet channel 9, located directly below the wind resistance pipe 7. The guide column 6 includes a baffle 6.1, a first guide vane 6.2, and a second guide vane 6.3. The connection between the first part 9.1 and the second part 9.2 is called the connection end 9.3. The first guide vane 6.2 is fixed to the side of the baffle 6.1 facing the air inlet direction, and the second guide vane 6.3 is fixed to the side of the baffle 6.1 away from the air inlet direction. Preferably, a plurality of first guide vanes 6.2 are arranged in parallel, and a plurality of second guide vanes 6.3 are arranged radially. Preferably, the number of first guide vanes 6.2 is greater than the number of second guide vanes 6.3.

[0035] The first guide vane 6.2 is located on the windward side, and the second guide vane 6.3 is located on the windward side. All the first guide vanes 6.2 are perpendicular to the baffle 521, while some of the second guide vanes 6.3 are inclined relative to the baffle 6.1. There are more first guide vanes 6.2 than second guide vanes 6.3. On the one hand, the flow rate entering the wind resistance pipe 7 through the first guide vane 6.2 is larger, and the turbulent kinetic energy is also greater. Therefore, more guide vanes are needed for rectification and turbulence elimination. On the other hand, appropriately increasing the resistance at the front end helps to guide the airflow to the rear end. However, the flow rate entering the wind resistance pipe through the direction of the second guide vane 6.3 is smaller, and the turbulent kinetic energy is also smaller. If too many second guide vanes 6.3 are added, it will not only fail to significantly reduce the turbulent kinetic energy, but will also significantly increase the air resistance in the direction of the second guide vane 6.3, increasing the fan load. Before entering the transition chamber 10 through the second part 9.2 of the second air intake channel 9, the external air will pass through the guide strip 2.2 and the guide column 6. The guide strip 2.2 can effectively reduce the turbulent noise originally generated at the 180° turn by rectifying the flow. The guide column 6 can restrict the flow of air in the direction outside the axial direction of the wind resistance pipe 7 by dividing the air intake section of the wind resistance pipe 7, thereby reducing turbulent kinetic energy and reducing pressure fluctuation at the pressure port. Figure 13 The image shows the turbulent kinetic energy cloud diagram of the axial cross-section of the drag duct 7 without the guide column 6. Figure 14 The image shows the turbulent kinetic energy cloud diagram of the axial section of the wind resistance tube 7 with the guide column 6. It can be seen that the turbulent kinetic energy inside the wind resistance tube 7 decreases significantly after the guide column 6 is adopted.

[0036] like Figure 6 , Figure 8 As shown, the air intake sequence of the ventilator in this embodiment is as follows: external air enters the first air intake channel 8 through the air intake 2.1, and enters the first part 9.1 of the second air intake channel 9 at the end of the first air intake channel 8. In the first part 9.1, it turns and enters the second part 9.2. The guide strip 2.2 plays a role in stabilizing the flow and reducing noise here. Then it enters the transition chamber 10 through the wind resistance pipe 7, and then enters the fan chamber 11. The fan assembly 4 pressurizes the air and delivers it to the downstream humidifier 3 to increase the humidity, and then it is discharged to the outside of the ventilator.

[0037] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention is not limited to the specific embodiments described above; these embodiments are merely illustrative and not limiting. Those skilled in the art, under the guidance of the present invention, can make many modifications without departing from the spirit and scope of the claims, and all such modifications fall within the protection scope of the present invention.

Claims

1. A flow stabilization and noise reduction structure for a ventilator, the ventilator including a ventilator base (2), wherein an air inlet (2.1) is provided on the ventilator base (2); characterized in that, It also includes a first air intake channel (8) and a second air intake channel (9); The first air inlet channel (8) is connected to the air inlet (2.1); the first air inlet channel (8) is stacked above the second air inlet channel (9), and the end of the first air inlet channel (8) away from the air inlet (2.1) is connected to the second air inlet channel (9); The ventilator base (2) is provided with a guide strip (2.2), which is located in the second air inlet channel (9) and extends from the side wall of the ventilator base (2) in the air inlet direction.

2. The current stabilization and noise reduction structure for a ventilator according to claim 1, characterized in that, The guide strips (2.2) are arranged in parallel in three places, and the middle guide strip (2.2) is higher than the guide strips (2.2) on both sides.

3. The current stabilization and noise reduction structure for a ventilator according to claim 1, characterized in that, The second air inlet channel (9) is also provided with a vertically extending guide column (6), which is located directly below the wind resistance pipe (7); the guide column (6) includes a baffle (6.1), a first guide vane (6.2) and a second guide vane (6.3); the first guide vane (6.2) is fixed to the side of the baffle (6.1) facing the air inlet direction, and the second guide vane (6.3) is fixed to the side of the baffle (6.1) away from the air inlet direction.

4. The current stabilization and noise reduction structure for a ventilator according to claim 3, characterized in that, A plurality of the first guide vanes (6.2) are arranged in parallel, and a plurality of the second guide vanes (6.3) are arranged radially.

5. The current stabilization and noise reduction structure for a ventilator according to claim 4, characterized in that, The number of the first guide vanes (6.2) is greater than the number of the second guide vanes (6.3).

Images