Ventilation treatment device

Abstract

The invention discloses ventilation treatment equipment which comprises a shell, an air inlet cavity located in the shell and a fan located in the shell and further comprises an air outlet cavity located in the air inlet cavity. And the fan is used for conveying air in the air inlet chamber into the air outlet chamber. The internal space of the portable breathing machine is fully utilized, and more space is utilized as much as possible in a limited space to serve as an anechoic chamber; not only is the upstream air inlet path of the fan muffled, but also the downstream air outlet path of the fan is muffled.

Description

Technical Field

[0001] The invention relates to a ventilation therapy device, belonging to the technical field of ventilation therapy devices, and in particular to a portable ventilation therapy device (portable ventilator). Background Art

[0002] Ventilation therapy equipment, also known as ventilators, is mainly used to assist in the treatment of sleep apnea syndrome. Because it is a device that assists sleep, noise level is one of the most important performance indicators of ventilators.

[0003] In order to meet the travel needs of some patients, ventilator manufacturers have also developed small portable ventilators. Noise is the biggest problem facing portable ventilators. Because of their small size, there is not enough space for silencing, such as not enough space to build a special anechoic chamber, which makes noise control always a design difficulty for portable ventilators. The fan is the noise source of the ventilator. The main paths of noise propagation include the inlet noise caused by the return along the inlet path, the noise transmitted to the outside through the shell, and the outlet noise propagated along the outlet path. How to reduce noise while taking into account the basic performance of portable ventilators has always been a technical problem that R&D personnel have been committed to solving. Summary of the invention

[0004] In order to overcome the problems existing in the prior art, the present invention provides a ventilation treatment device that can fully utilize the internal space of a portable ventilator and significantly reduce the noise of the portable ventilator. The specific technical solution is as follows.

[0005] A ventilation therapy device, comprising a housing, an air inlet chamber located in the housing, and a fan located in the housing, characterized in that:

[0006] It also includes an air outlet chamber, which is located in the air inlet chamber; the fan is used to transport the air in the air inlet chamber to the air outlet chamber.

[0007] By adopting the above technical solution, the air in the environment enters the air inlet chamber through the air inlet or air inlet pipe arranged on the shell, the air in the air inlet chamber is sucked into the fan, and the pressurized air generated by the fan enters the air outlet chamber, and the air outlet chamber acts as a silencing chamber, thereby reducing the conducted noise transmitted along the air outlet path. The limited space of the portable ventilator is fully utilized to set the air outlet chamber in the air inlet chamber, effectively reducing the noise while meeting the portable function of the portable ventilator.

[0008] Furthermore, the air inlet chamber includes a first air inlet chamber, a second air inlet chamber, and a third air inlet chamber. The first air inlet chamber is arranged adjacent to the third air inlet chamber, and the second air inlet chamber is connected to both the first air inlet chamber and the third air inlet chamber. The air outlet chamber is located in the second air inlet chamber, and the fan is located in the third air inlet chamber and is configured to receive air from the third air inlet chamber. Preferably, the air inlet of the portable ventilator is located at one end of the first air inlet chamber away from the second air inlet chamber. The air in the environment first enters the first air inlet chamber through the air inlet, and then the air enters the second air inlet chamber, and then enters the third air inlet chamber again. The third air inlet chamber is also a fan chamber. The fan sucks in the air in the third air inlet chamber, pressurizes it, and then transports it to the air outlet chamber. The air after being silenced by the air outlet chamber is inhaled by the user through the pipeline. By adopting the above-mentioned three air inlet chambers, on the one hand, the air travel route is increased as much as possible, and within the limited space of the portable ventilator, the air inlet path before entering the fan is extended, and the air outlet path of the air coming out of the fan is extended; on the other hand, it is convenient to fully utilize the space of the first air inlet chamber, the second air inlet chamber, the third air inlet chamber and the air outlet chamber as a silencing chamber, and the three air inlet chambers play the role of triple air inlet silencing; in addition, the layout of the three air inlet chambers and the air outlet chamber makes the air travel path roughly present two 180-degree turns, which greatly reduces the noise caused by the fan along the air inlet path and transmitted back to the air inlet. Those skilled in the art are aware that: when the airway resistance is large, the fan needs a higher speed to achieve the same working pressure, which will cause greater noise; and small airway resistance will make the noise easier to transmit. The layout of the first air inlet chamber, the second air inlet chamber, the third air inlet chamber and the air outlet chamber is convenient for a good balance between airway resistance and noise control, so that airway resistance control and noise control reach a balance.

[0009] Preferably, the first air inlet chamber, the second air inlet chamber and the air outlet chamber are all provided with sound-absorbing cotton, which is more conducive to improving the noise reduction effect by absorbing noise.

[0010] Further, the air outlet chamber is connected to the fan through a first pipe, and the air outlet chamber is connected to the outside of the housing through a second pipe; the first pipe and the second pipe are not coaxially arranged. Preferably, the first pipe and the second pipe are arranged in parallel and not coaxially. The non-coaxial arrangement of the first pipe and the second pipe is conducive to improving the sound elimination effect of the air outlet chamber.

[0011] Furthermore, the air outlet chamber is an irregular polygon in a horizontal section. The irregular polygon can help improve the sound-absorbing effect of the air outlet chamber. Preferably, in a horizontal section, the area occupied by the air outlet chamber is at least 30% of the area occupied by the second air inlet chamber. By expanding the area (volume) of the air outlet chamber, it is helpful to improve the sound-absorbing effect of the air outlet chamber.

[0012] Further, the second air inlet chamber and the third air inlet chamber are connected through the first fan cask inlet and / or the second fan cask inlet. Preferably, the first fan cask inlet and the second fan cask inlet are respectively located on both sides of the air outlet chamber. By setting the first fan cask inlet and the second fan cask inlet, the gas is allowed to enter the third air inlet chamber (fan cask) from different directions to eliminate the rotation of the gas at the fan air inlet caused by the rotation of the fan impeller, thereby avoiding or reducing the increase in resistance and noise caused by the rotation of the air flow. By setting the first fan cask inlet and the second fan cask inlet on both sides of the air outlet chamber, the air in the second air inlet chamber is divided into two paths and enters the third air inlet chamber through the first fan cask inlet and the second fan cask inlet respectively. The lengths of these two air inlet paths are different, so that the sound waves transmitted back along the air paths of different lengths will produce a phase difference after meeting, thereby canceling or weakening each other.

[0013] Furthermore, the outer shell of the third air inlet chamber adopts a multi-layer structure, including an inner flexible material layer and an outer hard material layer. Preferably, the flexible material layer is made of silicone, sponge, etc., and the hard material layer is made of engineering plastics, etc. The fan is the largest noise source, so by adopting a multi-layer structure of the outer shell, it is helpful to reduce the noise directly transmitted from the third air inlet chamber (fan compartment).

[0014] Furthermore, reinforcing ribs are provided on the inner walls of the first air intake chamber and the second air intake chamber. The reinforcing ribs can increase the rigidity of the shell, thereby reducing the noise propagating outward through the shell constituting the air intake chamber.

[0015] Compared with the prior art, the present invention has the following beneficial effects.

[0016] 1. Make full use of the internal space of the portable ventilator and use as much space as possible as a anechoic chamber within the limited space; not only the air intake path upstream of the fan is silenced, but also the air outlet path downstream of the fan is silenced.

[0017] 2. The air intake path upstream of the fan and the air outlet path downstream of the fan are extended as much as possible within the limited space of the portable ventilator, and two 180-degree turns of the air route are achieved, which is conducive to achieving a balance between noise control and airway resistance.

[0018] 3. By providing the first air intake chamber, the second air intake chamber, and the third air intake chamber, triple air intake silencer of the air intake path is achieved.

[0019] 4. By setting the first fan compartment inlet and the second fan compartment inlet, it is helpful to avoid or reduce the increase in resistance and noise caused by the rotation of the airflow. The sound waves transmitted back along the air paths of different lengths will produce a phase difference after meeting, thereby offsetting or weakening each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an overall schematic diagram of the ventilation therapy device of the present invention;

[0021] Figure 2 It is a schematic diagram of the ventilation therapy device after removing the upper cover;

[0022] Figure 3 is a schematic diagram of the air flow path;

[0023] Figure 4 is a schematic diagram of a ventilation therapy device having a first blower compartment inlet and a second blower compartment inlet;

[0024] Figure 5 is a schematic diagram of an air flow path of a ventilation therapy device having a first blower compartment inlet and a second blower compartment inlet.

[0025] In the figure: upper cover 1, lower cover 2, first air inlet chamber 3, second air inlet chamber 4, third air inlet chamber 5, flexible material layer 5.1, hard material layer 5.2, side wall 6, fan 7, air outlet chamber 8, air inlet 9, connecting channel 10, first fan compartment inlet 11, diverter plate 11.1, second fan compartment inlet 12, first pipeline 13, second pipeline 14, reinforcing rib 15. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] See also Figure 1-Figure 3 The ventilation therapy device includes an upper cover 1 and a lower cover 2, which form a sealed shell. The upper cover 1 and the lower cover 2 can be fixed together by fasteners such as screws. A sealing ring (not shown) is provided at the joint between the upper cover 1 and the lower cover 2 to ensure the sealing performance of the shell and prevent the internal noise of the shell from being transmitted from the joint.

[0028] Figure 2The internal structure of the ventilation therapy device with the upper cover 1 removed is shown in the figure. The housing includes a first air inlet chamber 3, a second air inlet chamber 4, a third air inlet chamber 5 and an air outlet chamber 8. The first air inlet chamber 3 is in the shape of a long strip. The first air inlet chamber 3 and the third air inlet chamber 5 are arranged side by side and adjacent to each other. The two have a common side wall 6. The third air inlet chamber 5 is also a fan compartment. The fan 7 is installed in the third air inlet chamber 5. The first air inlet chamber 3 and the third air inlet chamber 5 are both located at the same end of the ventilation therapy device (that is, Figure 2 The second air inlet chamber 4 is located at the other end of the ventilation treatment device (that is, Figure 2 The second air inlet chamber 4 is connected to both the first air inlet chamber 3 and the third air inlet chamber 5; the air outlet chamber 8 is located in the second air inlet chamber 4, and the air outlet chamber 8 exists independently inside the second air inlet chamber 4 and is not directly connected to the second air inlet chamber 4 (that is, the air outlet chamber 8 is sealed relative to the second air inlet chamber 4). The first air inlet chamber 3, the second air inlet chamber 4, the third air inlet chamber 5 and the air outlet chamber 8 together roughly occupy the entire area of ​​the lower cover 2.

[0029] In a preferred embodiment, the first air inlet chamber 3 and the second air inlet chamber 4 are connected through a connecting channel 10, and the connecting channel 10 can be arranged with a sound-absorbing material and / or a sound-absorbing structure to reduce the noise penetration. The second air inlet chamber 4 and the third air inlet chamber 5 are connected through the first fan compartment inlet 11, and the fan 7 is connected to the air outlet chamber 8 through the first pipe 13, and the air outlet chamber 8 is connected to the outside of the lower cover 2 through the second pipe 14; preferably, the first pipe 13 and the second pipe 14 are arranged in parallel and not coaxially, and there is a certain interval between the two.

[0030] The air inlet 9 is located at one end of the first air inlet chamber 3 away from the second air inlet chamber 4. The air in the environment first enters the first air inlet chamber 3 through the air inlet 9, then enters the second air inlet chamber 4, and then enters the third air inlet chamber 5. The third air inlet chamber 5 is also a fan compartment. The fan 7 sucks the air in the third air inlet chamber 5, pressurizes it, and then transports it to the air outlet chamber 8. The air after being silenced by the air outlet chamber 8 is inhaled by the user through an external pipe (not shown) connected to the second pipe 14.

[0031] By adopting the above-mentioned arrangement of the three air inlet chambers, on the one hand, the air travel route is increased as much as possible, and within the limited space of the portable ventilator, both the air inlet path before the air enters the fan 7 and the air outlet path of the air coming out of the fan 7 are extended; on the other hand, it is convenient to fully utilize the space of the first air inlet chamber 3, the second air inlet chamber 4, the third air inlet chamber 5 and the air outlet chamber 8 as a silencing chamber, and the three air inlet chambers play a triple air inlet silencing role; in addition, the layout of the three air inlet chambers and the air outlet chamber 8 makes the air travel path roughly present two 180-degree turns (such as Figure 3 As shown in the figure, where the arrow indicates the direction of air flow), this will greatly reduce the noise caused by the fan 7 and transmitted back to the air inlet 9 along the air inlet path. The first air inlet chamber 3, the second air inlet chamber 4, and the third air inlet chamber 5 have different shapes and sizes, which can cope with noise in different frequency ranges. The first air inlet chamber 3, the second air inlet chamber 4, the third air inlet chamber 5 and the air outlet chamber 8 are all relatively closed spaces formed by various inner wall structures (wall structures), which limit the flow direction of air inside the ventilation therapy device.

[0032] Those skilled in the art know that: when the airway resistance is large, the fan 7 needs a higher speed to achieve the same working pressure, which will cause greater noise; while when the airway resistance is small, the noise is easier to transmit. The layout of the first air inlet chamber 3, the second air inlet chamber 4, the third air inlet chamber 5 and the air outlet chamber 8 is convenient for balancing the airway resistance and noise control, so that the airway resistance control and noise control are balanced.

[0033] Preferably, sound-absorbing cotton (not shown) is arranged in the first air inlet chamber 3, the second air inlet chamber 4 and the air outlet chamber 8. The sound-absorbing cotton is arranged to further improve the noise reduction effect.

[0034] In order to improve the sound-absorbing effect of the air outlet chamber 8, the air outlet chamber 8 is an irregular polygon in horizontal section, such as Figure 2 As shown, the air outlet chamber 8 is a trapezoidal structure, and the irregular polygon can help improve the sound-absorbing effect of the air outlet chamber 8. More advantageously, in the horizontal section, the area occupied by the air outlet chamber 8 is at least 30% of the area occupied by the second air inlet chamber 4. By expanding the area (volume) of the air outlet chamber 8, it is helpful to improve the sound-absorbing effect of the air outlet chamber 8. Among them, the horizontal section is roughly parallel to the connecting seam of the upper cover 1 and the lower cover 2. Among them, the area occupied by the second air inlet chamber 4 refers to the area occupied by the air outlet chamber 8 and the second air inlet chamber 4 together.

[0035] In order to further reduce noise, reinforcing ribs 15 are provided on the inner walls of the first air inlet chamber 3 and the second air inlet chamber 4. The reinforcing ribs 15 can increase the rigidity of the chamber shell, thereby reducing the noise propagating outward through the shell.

[0036] In the above technical solution, the first air inlet chamber 3, the second air inlet chamber 4, and the third air inlet chamber 5 constitute the air inlet chamber, but those skilled in the art can understand that the air inlet chamber can also be of other forms of layout and structure. As long as the air outlet chamber 8 is arranged inside the air inlet chamber, the limited space can be cleverly and fully utilized to perform noise reduction treatment on the air downstream of the fan.

[0037] In another embodiment, if Figure 4-Figure 5 As shown, based on the above embodiment, the second air inlet chamber 4 and the third air inlet chamber 5 are connected through the first fan chamber inlet 11 and the second fan chamber inlet 12 at the same time. Preferably, the first fan chamber inlet 11 and the second fan chamber inlet 12 are respectively located on both sides of the air outlet chamber 8. By setting the first fan chamber inlet 11 and the second fan chamber inlet 12, the gas enters the third air inlet chamber 5 (fan chamber) from different directions to eliminate the rotation of the gas at the fan inlet caused by the rotation of the impeller of the fan 7, thereby avoiding or reducing the increase in resistance and noise caused by the rotation of the airflow. Figure 5 As shown, Figure 5 The arrows in the figure indicate the direction of air flow. By arranging the first fan chamber inlet 11 and the second fan chamber inlet 12 on both sides of the air outlet chamber 8, the air in the first air inlet chamber 3 is divided into two paths and enters the third air inlet chamber 5 through the first fan chamber inlet 11 and the second fan chamber inlet 12 respectively. The lengths of the two air inlet paths are different, so that the sound waves transmitted back along the air paths of different lengths will produce a phase difference after meeting, thereby canceling or weakening each other, and the noise at the air inlet 9 can be further reduced. Preferably, a diverter plate 11.1 is arranged in the first fan chamber inlet 11 and / or the second fan chamber inlet 12, and the diverter plate 11.1 radiates from the center of the first fan chamber inlet 11 and / or the second fan chamber inlet 12 to the surroundings. As shown in Figure 4, the cross-section of the diverter plate 11.1 is cross-shaped. The diverter plate 11.1 is conducive to improving the flow field distribution of the airflow in the air inlet chamber 5 (fan chamber) and the fan chamber inlet, thereby reducing noise.

[0038] Preferably, if Figure 5 As shown, the outer shell of the third air inlet chamber 5 adopts a multi-layer structure, including an inner flexible material layer 5.1 and an outer hard material layer 5.2. Preferably, the flexible material layer 5.1 is made of silica gel, sponge, etc., and the hard material layer 5.2 is made of engineering plastics, etc. The fan 7 is the largest noise source, so by adopting a multi-layer structure outer shell, it is helpful to reduce the noise directly transmitted from the third air inlet chamber 5 (fan compartment).

[0039] The embodiments of the present invention are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention is not limited to the above-mentioned specific implementations, which are merely illustrative and not restrictive. Under the enlightenment of the present invention, those skilled in the art can also make many forms without departing from the scope of protection of the present invention and the claims, all of which belong to the protection scope of the present invention.

Claims

1. A ventilation therapy device comprising a housing, an air inlet chamber located in the housing, and a fan (7) located in the housing, Features: It also comprises an air outlet chamber (8), wherein the air outlet chamber (8) is located in the air inlet chamber; the fan (7) is used to transport the air in the air inlet chamber to the air outlet chamber (8).

2. The ventilation therapy device according to claim 1, It is characterized in that The air inlet chamber comprises a first air inlet chamber (3), a second air inlet chamber (4), and a third air inlet chamber (5); the first air inlet chamber (3) and the third air inlet chamber (5) are arranged side by side and adjacent to each other; the second air inlet chamber (4) is connected to both the first air inlet chamber (3) and the third air inlet chamber (5); the air outlet chamber (8) is located in the second air inlet chamber (4); the fan (7) is located in the third air inlet chamber (5) and is configured to receive air from the third air inlet chamber (5).

3. The ventilation therapy device according to claim 2, It is characterized in that The air inlet is located at one end of the first air inlet chamber (3) away from the second air inlet chamber (4).

4. The ventilation therapy device according to claim 2, It is characterized in that The first air inlet chamber (3), the second air inlet chamber (4) and the air outlet chamber (8) are all provided with sound-absorbing cotton.

5. The ventilation therapy device according to claim 1, It is characterized in that The air outlet chamber (8) is connected to the fan (7) via a first pipe (13), and the air outlet chamber (8) is connected to the outside of the shell via a second pipe (14); the first pipe (13) and the second pipe (14) are not coaxially arranged.

6. The ventilation therapy device according to claim 5, It is characterized in that The first pipeline (13) and the second pipeline (14) are arranged in parallel and are not coaxial.

7. The ventilation therapy device according to claim 1, It is characterized in that The air outlet chamber (8) is in an irregular polygonal shape in a horizontal section.

8. The ventilation therapy device according to claim 2, It is characterized in that In a horizontal cross section, the area occupied by the air outlet chamber (8) is at least 30% of the area occupied by the second air inlet chamber (4).

9. The ventilation therapy device according to claim 2, It is characterized in that The second air intake chamber (4) and the third air intake chamber (5) are in communication with each other via the first fan compartment inlet (11) and / or the second fan compartment inlet (12).

10. The ventilation therapy device according to claim 9, It is characterized in that A flow divider plate (11.1) is arranged in the first fan compartment inlet (11) and / or the second fan compartment inlet (12).

11. The ventilation therapy device according to claim 9, It is characterized in that The first fan compartment inlet (11) and the second fan compartment inlet (12) are respectively located on two sides of the air outlet chamber (8).

12. The ventilation therapy device according to claim 2, It is characterized in that The outer shell of the third air inlet chamber (5) adopts a multi-layer structure, comprising an inner flexible material layer (5.1) and an outer hard material layer (5.2).

13. The ventilation therapy device according to claim 2, It is characterized in that Reinforcement ribs (15) are provided on the inner walls of the first air intake chamber (3) and the second air intake chamber (4).

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