Noise reduction structure and oxygen generator

Abstract

The utility model provides a noise reduction structure and an oxygen generator. The noise reduction structure comprises a noise reduction cylinder, a wind shielding piece and an elastic piece, wherein the noise reduction cylinder is internally provided with a first inner cavity for airflow to circulate; the wind shielding piece and the elastic piece are arranged in the first inner cavity; the air blocking piece is located on a flowing path of airflow, and the elastic piece is arranged between the air blocking piece and the cavity wall of the first inner cavity in a matched mode. The air blocking piece is constructed to be capable of being pushed by air flow to enable the elastic piece to deform so as to buffer the air flow. Based on the technical scheme, the airflow is buffered and the kinetic energy of the airflow is reduced by utilizing the matching structure of the wind shielding piece and the elastic piece, so that the impact strength of the airflow in the exhaust structure can be reduced, the local pressure is further reduced, and the noise generated when the airflow is exhausted is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen concentrators, in particular to a noise reduction structure and an oxygen concentrator. Background Art

[0002] At present, oxygen concentrators are gradually entering the public's field of vision, and people's demand for oxygen concentrators is increasing. Most of the oxygen concentrators on the market use high-pressure air to pass through molecular sieves to adsorb nitrogen, which increases the oxygen concentration in the air and discharges high-concentration oxygen, and then desorbs the adsorbed nitrogen and discharges it. However, a relatively strong noise is generated when nitrogen is discharged.

[0003] Most existing oxygen generators use sound insulation and sound absorption structures to reduce the noise intensity when nitrogen is discharged, but they do not take into account that the noise intensity is also related to factors such as the flow rate of nitrogen when it is discharged, because a faster flow rate has greater kinetic energy and will produce greater impact force at the exhaust structure. Therefore, the improvement effect of existing oxygen generators on noise is not ideal. Utility Model Content

[0004] In order to solve the problem that the existing noise reduction method for exhaust noise does not consider the influence of factors such as gas kinetic energy on noise intensity and thus has an unsatisfactory noise reduction effect, the utility model proposes a noise reduction structure and an oxygen concentrator.

[0005] In the first aspect, the utility model provides a noise reduction structure, comprising:

[0006] A noise reduction cylinder, wherein a first inner cavity is provided inside the cylinder for airflow to flow; and

[0007] A windshield member and an elastic member both disposed in the first inner cavity, the windshield member being located on the flow path of the airflow, and the elastic member being cooperatively disposed between the windshield member and the cavity wall of the first inner cavity;

[0008] Wherein, the wind shielding member is configured to be pushed by the airflow to cause the elastic member to deform so as to buffer the airflow.

[0009] In one embodiment, the edge of the windshield is in sliding contact with the cavity wall of the first inner cavity, and a ventilation hole is provided on the windshield; or, the edge of the windshield is not in contact with the cavity wall of the first inner cavity and a ventilation gap is formed therebetween. Through this embodiment, the windshield blocks the airflow to a certain extent, but does not completely block the flow of the airflow.

[0010] In one embodiment, a guide bayonet is provided at the edge of the windshield, and a guide ridge that is consistent with the flow direction of the airflow is provided on the cavity wall of the first inner cavity, and when the edge of the windshield is in sliding contact with the cavity wall of the first inner cavity, the guide bayonet cooperates with the guide ridge. Through this embodiment, the cooperation between the guide ridge and the guide bayonet is utilized to further limit the cooperation between the windshield and the first inner cavity, and to guide the movement of the windshield.

[0011] In one embodiment, a protruding first connection portion is provided on one side of the windshield, a protruding second connection portion is provided on the wall surface of the first inner cavity, the elastic member is a spring, and the two ends of the spring are respectively sleeved on the first connection portion and the second connection portion. Through this embodiment, the first connection portion and the second connection portion are used to improve the stability of the cooperation between the elastic member, the windshield and the first inner cavity.

[0012] In one embodiment, the noise reduction cylinder is further provided with a second inner cavity connected to the first inner cavity, and the airflow flows through the first inner cavity and the second inner cavity in sequence before being discharged. In this embodiment, the second inner cavity is a buffer cavity, which further buffers the airflow before being discharged, thereby further reducing the noise that may be generated by the airflow.

[0013] In one embodiment, a sound-absorbing component is disposed in the first inner cavity and / or the second inner cavity, and the sound-absorbing component includes a sound-absorbing lining layer disposed on the wall of the corresponding inner cavity and / or a sound-absorbing groove opened on the wall of the corresponding inner cavity. According to this embodiment, the sound-absorbing component increases the number of reflections during the transmission of sound waves and reduces their energy to achieve noise reduction and sound absorption.

[0014] In one embodiment, a vent connector is provided at both the air inlet and air outlet of the noise reduction tube, and the vent connector includes an end cover and a plug-in portion connected to the end cover, and when the plug-in portion is plugged into the noise reduction tube, the end cover is buckled onto the end surface of the noise reduction tube. Through this embodiment, the vent connector is used to partially close the end of the noise reduction tube and to connect the corresponding pipeline for air intake or exhaust.

[0015] In one embodiment, the vent joint further includes a first sealing ring and a second sealing ring, wherein the first sealing ring is sleeved on the plug-in portion, and the second sealing ring is embedded in a position on the end cover that can be engaged with the end surface of the noise reduction tube. Through this embodiment, the first sealing ring and the second sealing ring are used to maintain the seal inside the noise reduction tube to prevent airflow from leaking out.

[0016] In one embodiment, the end cover is provided with an assembly hole, and the assembly hole is used to cooperate with a fastener that can be connected to the screw hole at the end of the noise reduction cylinder.

[0017] In a second aspect, the utility model provides an oxygen concentrator, which includes the above-mentioned noise reduction structure and thus has all the technical effects thereof.

[0018] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the utility model can be achieved.

[0019] The noise reduction structure and oxygen concentrator provided by the utility model have at least the following beneficial effects compared with the prior art:

[0020] The utility model discloses a noise reduction structure and an oxygen concentrator, which utilize the matching structure of a wind shield and an elastic member to buffer the airflow and reduce the kinetic energy of the airflow, thereby reducing the impact intensity of the airflow in the exhaust structure, thereby reducing the local pressure and thus reducing the noise generated when the airflow is discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0022] Figure 1 A cross-sectional view showing the noise reduction structure of the utility model;

[0023] Figure 2 An exploded view of the noise reduction structure of the utility model is shown;

[0024] Figure 3 The figure shows the appearance of the noise reduction structure of the utility model.

[0025] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0026] Reference numerals:

[0027] 1-noise reduction cylinder, 11-first inner cavity, 111-second connecting part, 112-guide ridge, 12-second inner cavity, 2-wind shield, 21-ventilation hole, 22-guide bayonet, 23-first connecting part, 3-elastic part, 4-ventilation joint, 41-end cover, 42-plug-in part, 5-first sealing ring, 6-second sealing ring. DETAILED DESCRIPTION

[0028] The utility model will be further described below in conjunction with the accompanying drawings.

[0029] Example 1

[0030] An embodiment of the utility model provides a noise reduction structure, including a noise reduction cylinder 1 with a first inner cavity 11 arranged therein, and a wind shield 2 and an elastic member 3 both arranged in the first inner cavity 11. The first inner cavity 11 is used for airflow circulation, the wind shield 2 is in the flow path of the airflow, and the elastic member 3 is cooperatively arranged between the wind shield 2 and the cavity wall of the first inner cavity 11.

[0031] The wind shield 2 is configured to be pushed by the airflow to deform the elastic member 3 so as to buffer the airflow.

[0032] Specifically, the main purpose of the utility model is to buffer the airflow and reduce the kinetic energy of the airflow, so as to reduce the impact intensity of the airflow on the inside of the exhaust structure, thereby reducing the local pressure and thus reducing the noise generated when the airflow is discharged.

[0033] Based on the above purpose, as shown in the attached figure Figure 1 As shown, the utility model sets a windshield 2 and an elastic member 3 in the first inner cavity 11 of the noise reduction cylinder 1, and the windshield 2 is in the flow path of the airflow, so that when the airflow flows through the first inner cavity 11, it will impact the windshield 2 and push the windshield 2 to move, and then the windshield 2 will also drive the elastic member 3 to move, so that the elastic member 3 will be deformed (stretched or compressed); in this embodiment, in the direction of airflow, the elastic member 3 is set downstream of the windshield 2, so it will be compressed by the windshield 2. At this time, part of the kinetic energy of the airflow will be converted into the elastic potential energy of the elastic member 3, the kinetic energy of the airflow is reduced, and the speed is reduced, so that the buffering effect on the high-speed airflow is achieved, and the noise generated by the airflow is effectively reduced.

[0034] Example 2

[0035] An embodiment of the utility model provides a noise reduction structure, including a noise reduction cylinder 1 with a first inner cavity 11 arranged therein, and a wind shield 2 and an elastic member 3 both arranged in the first inner cavity 11. The first inner cavity 11 is used for airflow circulation, the wind shield 2 is in the flow path of the airflow, and the elastic member 3 is fitted between the wind shield 2 and the cavity wall of the first inner cavity 11.

[0036] The wind shielding member 2 can be pushed by the airflow to cause the elastic member 3 to deform, so as to buffer the airflow.

[0037] Furthermore, since the airflow needs to flow through the first inner cavity, the windshield needs to achieve a certain degree of blocking of the airflow, but cannot completely block the flow of the airflow. Therefore, the structure of the windshield and the matching structure between the windshield and the first inner cavity need to be specially designed. The following two structural designs are proposed in this embodiment:

[0038] (1) As shown in the attached figure Figure 1 and Figure 2As shown, the edge of the windshield 2 is in sliding contact with the cavity wall of the first inner cavity 11, and a ventilation hole 21 is provided on the windshield 2. In this structure, the overall area of ​​the projection of the windshield 2 in the airflow direction is equivalent to the flow area of ​​the first inner cavity 11, the edge of the windshield 2 is in sliding contact with the first inner cavity 11, and the airflow flows through the multiple ventilation holes 21 on the windshield 2. In this structure, the windshield 2 has the largest contact surface with the airflow, the windshield buffering effect is good, and the edge of the windshield 2 and the cavity wall of the second inner cavity 12 are mutually limited and constrained, which can ensure the stability of the windshield 2 during the activity process. This embodiment preferably adopts this structure.

[0039] (2) The edge of the windshield 2 does not contact the wall of the first inner cavity 11 and a ventilation gap is formed between the two. This structure is not shown in the drawings. This structure is relatively simple in structural design. It only needs to design the windshield 2 to be smaller than the inner diameter of the first inner cavity 11, and no additional design is required for the structure of the windshield 2. However, since there is no limit fit relationship between the windshield 2 and the wall of the first inner cavity 11, the stability of the windshield 2 during the activity is slightly poor.

[0040] Furthermore, a guide slot 22 is provided on the edge of the wind shield 2, and a guide ridge 112 consistent with the airflow direction is provided on the cavity wall of the first inner cavity 11. When the edge of the wind shield 2 slides in contact with the cavity wall of the first inner cavity 11, the guide slot 22 cooperates with the guide ridge 112.

[0041] Specifically, as shown in the attached figure Figure 1 and Figure 2 As shown, for the matching structure of the edge of the windshield 2 and the cavity wall of the first inner cavity 11 in sliding contact, a plurality of guide ridges 112 are provided on the cavity wall of the first inner cavity 11 to further limit the matching of the windshield 2 and the first inner cavity 11 and guide the movement of the windshield 2. The plurality of guide ridges 112 are evenly distributed on the cavity wall of the first inner cavity 11 along the circumferential direction, and the edges of the windshield 2 are respectively provided with a plurality of guide bayonet holes 22 corresponding to the guide ridges 112 one by one and the two are matched with each other.

[0042] Example 3

[0043] An embodiment of the utility model provides a noise reduction structure, including a noise reduction cylinder 1 with a first inner cavity 11 arranged therein, and a wind shield 2 and an elastic member 3 both arranged in the first inner cavity 11. The first inner cavity 11 is used for airflow circulation, the wind shield 2 is in the flow path of the airflow, and the elastic member 3 is fitted between the wind shield 2 and the cavity wall of the first inner cavity 11.

[0044] The wind shielding member 2 can be pushed by the airflow to cause the elastic member 3 to deform, so as to buffer the airflow.

[0045] Furthermore, a protruding first connection portion 23 is provided on one side of the wind shield 2, a protruding second connection portion 111 is provided on the wall surface of the first inner cavity 11, and the elastic member 3 is a spring and both ends of the spring are respectively sleeved on the first connection portion 23 and the second connection portion 111.

[0046] Specifically, as shown in the attached figure Figure 1 As shown, the two ends of the elastic member 3 are respectively matched with the windshield member 2 and the cavity wall of the first inner cavity 11; in this embodiment, the end of the elastic member 3 is matched with the windshield member 2 and the cavity wall of the first inner cavity 11 by abutting. In order to improve the stability of the matching between the elastic member 3 and the windshield member 2 and the first inner cavity 11, a first connecting portion 23 and a second connecting portion 111 are respectively arranged on one side of the windshield member 2 and the wall surface of the first inner cavity 11, and they are opposite to each other. The first connecting portion 23 and the second connecting portion 111 are both cylindrical structures (the channel in the center is used for wind passing), and the elastic member 3 is a spring, and the two ends of the spring are respectively tightly sleeved on the first connecting portion 23 and the second connecting portion 111, and the ends of the spring are abutted against the corresponding parts of the wall of the windshield member 2 and the first inner cavity 11.

[0047] Furthermore, a second inner cavity 12 communicating with the first inner cavity 11 is provided inside the noise reduction cylinder 1, and the airflow flows through the first inner cavity 11 and the second inner cavity 12 in sequence and then is discharged to the outside.

[0048] Specifically, as shown in the attached figure Figure 1 As shown, a first inner cavity 11 and a second inner cavity 12 are sequentially arranged inside the noise reduction cylinder 1 on the flow path of the airflow, and the components for buffering the airflow are mainly arranged in the first inner cavity 11. No corresponding components are arranged inside the second inner cavity 12, and the whole is a cavity. Its main function is to serve as a buffer cavity to further buffer the airflow before it is discharged, thereby further reducing the noise that may be generated by the airflow.

[0049] Optionally, a sound-absorbing component (not shown in the drawings) is provided in the first inner cavity 11 and / or the second inner cavity 12, and the sound-absorbing component includes a sound-absorbing lining layer provided on the inner cavity wall and / or a sound-absorbing groove opened on the inner cavity wall. The sound-absorbing component is mainly used to increase the number of reflections in the process of sound wave transmission and reduce its energy to achieve noise reduction and sound absorption.

[0050] Example 4

[0051] An embodiment of the utility model provides a noise reduction structure, including a noise reduction cylinder 1 with a first inner cavity 11 arranged therein, and a wind shield 2 and an elastic member 3 both arranged in the first inner cavity 11. The first inner cavity 11 is used for airflow circulation, the wind shield 2 is in the flow path of the airflow, and the elastic member 3 is fitted between the wind shield 2 and the cavity wall of the first inner cavity 11.

[0052] The wind shielding member 2 can be pushed by the airflow to cause the elastic member 3 to deform, so as to buffer the airflow.

[0053] Furthermore, a vent connector 4 is provided at both the air inlet and air outlet ends of the noise reduction tube 1. The vent connector 4 includes an end cover 41 and a plug-in portion 42 connected to the end cover 41. When the plug-in portion 42 is plugged into the noise reduction tube 1, the end cover 41 is buckled onto the end surface of the noise reduction tube 1.

[0054] Specifically, the vent connector is mainly used to partially seal the end of the noise reduction cylinder and to connect the corresponding pipeline for air intake or exhaust, wherein the air intake end of the noise reduction cylinder corresponds to one end of the first inner cavity, and the air outlet end corresponds to one end of the second inner cavity. The vent connector is detachably connected to the noise reduction cylinder through the plug-in part, and the rear end cover of the connection is buckled on the end surface of the noise reduction cylinder mouth.

[0055] Furthermore, the vent joint 4 also includes a first sealing ring 5 and a second sealing ring 6 . The first sealing ring 5 is sleeved on the plug-in portion 42 , and the second sealing ring 6 is embedded in a position on the end cover 41 that can be engaged with the end surface of the noise reduction tube 1 .

[0056] Specifically, as shown in the attached figure Figure 2 and Figure 3 As shown, the first sealing ring 5 is sleeved on the plug-in portion, and can be in sealing contact with the cavity wall of the first inner cavity 11 or the second inner cavity 12, and the first sealing ring 5 and the cavity wall of the inner cavity are squeezed against each other, and the friction force can be used to keep the ventilation joint 4 pre-fixed on the noise reduction cylinder 1; the second sealing ring 6 is embedded on the inner side surface of the end cover 41, and is used to be in sealing contact with the end surface of the noise reduction cylinder 1. The first sealing ring 5 and the second sealing ring 6 are used to keep the inside of the noise reduction cylinder 1 sealed to prevent airflow leakage.

[0057] Furthermore, an assembly hole is provided on the end cover 41 , and the assembly hole is used to cooperate with a fastener that can be connected to a screw hole at the end of the noise reduction cylinder 1 , thereby fixing the vent joint 4 on the noise reduction cylinder 1 .

[0058] Example 5

[0059] An embodiment of the utility model provides an oxygen concentrator, which includes a noise reduction structure arranged on a nitrogen exhaust pipeline. The noise reduction structure can refer to the solution of any one of embodiments 1 to 4 or a solution after combining multiple embodiments.

[0060] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0061] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.

Claims

1. A noise reduction structure, characterized in that: include: A noise reduction cylinder, wherein a first inner cavity is provided inside for air flow to flow; as well as A windshield member and an elastic member both disposed in the first inner cavity, the windshield member being located on the flow path of the airflow, and the elastic member being cooperatively disposed between the windshield member and the cavity wall of the first inner cavity; Wherein, the wind shielding member is configured to be pushed by the airflow to cause the elastic member to deform so as to buffer the airflow.

2. The noise reduction structure according to claim 1, characterized in that: The edge of the wind shield is in sliding contact with the cavity wall of the first inner cavity, and a ventilation hole is provided on the wind shield; or, the edge of the wind shield is not in contact with the cavity wall of the first inner cavity and a ventilation gap is formed therebetween.

3. The noise reduction structure according to claim 2, characterized in that: The edge of the wind shield is provided with a guide slot, and the cavity wall of the first inner cavity is provided with a guide ridge consistent with the flow direction of the airflow. When the edge of the wind shield slides in contact with the cavity wall of the first inner cavity, the guide slot cooperates with the guide ridge.

4. The noise reduction structure according to claim 1, characterized in that: A protruding first connection portion is provided on one side of the wind shield, a protruding second connection portion is provided on the wall surface of the first inner cavity, the elastic member is a spring, and two ends of the spring are respectively sleeved on the first connection portion and the second connection portion.

5. The noise reduction structure according to claim 1, characterized in that: The noise reduction tube is further provided with a second inner cavity connected with the first inner cavity, and the airflow flows through the first inner cavity and the second inner cavity in sequence and then is discharged to the outside.

6. The noise reduction structure according to claim 5, characterized in that: A sound-absorbing component is arranged in the first inner cavity and / or the second inner cavity, and the sound-absorbing component includes a sound-absorbing lining layer arranged on the wall of the corresponding inner cavity and / or a sound-absorbing groove opened on the wall of the corresponding inner cavity.

7. The noise reduction structure according to any one of claims 1 to 6, characterized in that: A vent connector is provided at both the air inlet and the air outlet of the noise reduction tube. The vent connector includes an end cover and a plug-in portion connected to the end cover. When the plug-in portion is plugged into the noise reduction tube, the end cover is buckled onto the end surface of the noise reduction tube.

8. The noise reduction structure according to claim 7, characterized in that: The ventilation joint also includes a first sealing ring and a second sealing ring. The first sealing ring is sleeved on the plug-in portion, and the second sealing ring is embedded in a position on the end cover that can be buckled with the end surface of the noise reduction tube.

9. The noise reduction structure according to claim 7, characterized in that: The end cover is provided with an assembly hole, and the assembly hole is used to cooperate with a fastener that can be connected to the screw hole at the end of the noise reduction cylinder.

10. An oxygen concentrator, characterized in that: The noise reduction structure comprises the noise reduction structure as claimed in any one of claims 1 to 9.

Images