Air type damper

Abstract

The utility model discloses an air type damper which comprises an outer sleeve piece and an inner sleeve piece, and the outer sleeve piece and the inner sleeve piece are each of a straight-pipe-shaped structure. One end part of the outer sleeve piece is of a closed structure, and the other end part of the outer sleeve piece is of an open structure, so that the outer sleeve piece integrally forms a cylindrical structure of which only one end part is communicated outwards; the inner sleeve part is implanted into the bottom of the outer sleeve part, a gap is formed between the inner wall of the outer sleeve part and the outer wall of the inner sleeve part, and the whole inner sleeve part linearly moves in a middle cavity where the outer sleeve part is located; and the ratio of the gap to the diameter of the inner sleeve piece is about 1 / 200 to 1 / 100. In the application, the gap is reserved between the outer sleeve part and the inner sleeve part, so that when the outer sleeve part and the inner sleeve part move relative to each other, air can pass through the gap to form larger resistance, and therefore, the rapid change of displacement is reduced to reduce fluctuation.

Description

Technical Field

[0001] This utility model belongs to the field of shock absorber technology, specifically relating to an air-type damper. Background Technology

[0002] Air conditioners are a common household appliance that can maintain indoor comfort by cooling or heating. In addition to regulating the temperature, air conditioners can also adjust the air volume and direction of airflow, usually through external ducts. However, the problem of air duct swaying can be caused by a variety of factors, including insecure duct installation, improper connection between the duct and the fan, problems with the duct material or structure, and unstable airflow in the duct system.

[0003] Currently, in order to fix the oscillation of the air duct, it is usually necessary to use a buffer (spring) for relative fixation. The elastic force changes non-linearly, so it is prone to fluctuations. Over time, these fluctuations can cause the air duct to detach.

[0004] Chinese patent application publication number CN102777528B discloses an air damper device, comprising a rod with its inner end serving as a piston, and a cylinder housing the rod for reciprocating movement. As the rod advances, it compresses a venting portion connecting the space between the piston and the cylinder and the external space to apply the required resistance to the rod's movement. While this device can replace traditional spring-based fixing, its damping is relatively high, making it difficult to effectively fix the duct in fluctuating conditions. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an air damper that solves the above-mentioned technical problems existing in the prior art.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] An air-type damper includes an outer sleeve and an inner sleeve, both of which have a straight tubular structure;

[0008] The outer sleeve has a closed structure at one end and an open structure at the other end, so that the outer sleeve as a whole forms a cylindrical structure with only one end open to the outside.

[0009] The inner sleeve is inserted into the bottom of the outer sleeve, and a gap is formed between the inner wall of the outer sleeve and the outer wall of the inner sleeve, so that the inner sleeve moves linearly along the central cavity of the outer sleeve.

[0010] The distance between the gap and the diameter of the inner sleeve is 1 / 200 to 1 / 100.

[0011] Furthermore, the inner sleeve includes an extension rod and a piston, the piston being inserted into the interior of the outer sleeve and sliding therethrough, while a gap is formed between the inner wall of the outer sleeve and the outer wall of the piston.

[0012] One end of the extension rod is connected to the piston, and the other end extends outward from the opening side of the outer sleeve.

[0013] Furthermore, one end of the extension rod is fixed to the central axis of the piston component by a locking bolt, and the other end extending out of the outer sleeve component is bent.

[0014] Furthermore, the position of the extended end of the extension rod relative to the centerline of the piston component has a degree of freedom.

[0015] Furthermore, an end cap is provided at the open end of the outer sleeve, and a connecting hole is provided at the center of the end cap, so that the extension rod passes through the connecting hole where the end cap is located, and moves synchronously in the up and down directions.

[0016] Furthermore, the inner sleeve is a cylindrical structure with one end closed, and the open end of the inner sleeve is inserted into the bottom of the outer sleeve, while a gap is formed between the outer wall of the inner sleeve and the inner wall of the outer sleeve.

[0017] Furthermore, the inner sleeve is provided with a second connecting part on the outer side of the end of the closed section, so that the second connecting part and the inner sleeve are integrally formed cavity structures.

[0018] Furthermore, a coating layer, which is a polytetrafluoroethylene layer, is attached to the inner wall of the outer sleeve and the outer wall of the inner sleeve.

[0019] Furthermore, a first connecting portion is provided at the outer end of the outer sleeve component, thereby realizing that the end cap and the outer sleeve component are an integral cavity structure.

[0020] Furthermore, a pin hole is provided in the circumferential direction where the first connecting part and the second connecting part are located, and the pin hole is used to connect to the external connecting parts respectively.

[0021] The beneficial effects of this utility model are:

[0022] 1. The air damper used in this device consists of an outer sleeve and an inner sleeve that work together to facilitate overall assembly.

[0023] 2. The device has a gap between the outer sleeve and the inner sleeve, which allows air to pass through the gap evenly when the outer sleeve and the inner sleeve move relative to each other, achieving a linear change in volume per unit time. This ensures the uniformity of the movement between the sleeves, creates greater damping, and reduces rapid changes in displacement to lower fluctuations.

[0024] 3. The device forms a coating between the contact surfaces of the outer sleeve and the inner sleeve, which is a polytetrafluoroethylene layer. This design reduces friction and wear during operation, ensuring operational accuracy and service life. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0027] Figure 2 This is an embodiment of the present utility model. Figure 1 A partial structural diagram at point A in the middle;

[0028] Figure 3 This is a schematic diagram of the outer sleeve structure according to Embodiment 1 of this utility model;

[0029] Figure 4 This is a schematic diagram of the inner sleeve structure of Embodiment 1 of this utility model;

[0030] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0031] Figure 6 This is a schematic diagram of the outer sleeve structure of Embodiment 2 of this utility model;

[0032] Figure 7 This is a schematic diagram of the inner sleeve structure of Embodiment 2 of this utility model. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the 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 scope of protection of the present utility model.

[0034] This utility model embodiment provides an air-type damper, including an outer sleeve 1 and an inner sleeve 2, both of which have a straight tubular structure;

[0035] The outer sleeve 1 has a closed structure at one end and an open structure at the other end, so that the outer sleeve 1 as a whole forms a cylindrical structure with only one end connected to the outside, and the other end is a closed structure.

[0036] The inner sleeve 2 is inserted into the bottom of the outer sleeve 1, and a gap 101 is formed between the inner wall of the outer sleeve 1 and the outer wall of the inner sleeve 2, so that the inner sleeve 2 moves linearly along the middle cavity where the outer sleeve 1 is located, and the movement between the outer sleeve 1 and the inner sleeve 2 at the same time produces a damping effect.

[0037] The distance between the gap 101 and the diameter of the inner sleeve 2 is 1 / 200 to 1 / 100.

[0038] A coating 102 is attached to the inner wall of the outer sleeve 1 and the outer wall of the inner sleeve 2. The coating 102 is a polytetrafluoroethylene layer. This coating 102 can reduce the friction and wear generated when the outer sleeve 1 and the inner sleeve 2 come into contact, so as to improve the accuracy and also improve the overall service life.

[0039] Based on the usage requirements, this application is designed in two ways. Example

[0040] like Figure 1-4 As shown, in this embodiment: the inner sleeve 2 includes an extension rod 21 and a piston 22. The piston 22 is inserted into the inner sleeve 1 and slides, while a gap 101 is formed between the inner wall of the outer sleeve 1 and the outer wall of the piston 22.

[0041] At this time, one end of the extension rod 21 is connected to the piston component 22 and fixed to the central axis of the piston component 22 by a locking bolt. This fixing method ensures that the direction of movement of the piston component 22 pulled by the extension rod 21 remains consistent, and also allows for disassembly and reassembly for easy assembly. The other end of the extension rod 21 extends outward from the opening side of the outer sleeve component 1. Furthermore, the other end of the extension rod 21 extending outward from the outer sleeve component 1 is bent. This bent structure facilitates connection with external connectors and avoids the detachment that can easily occur with a straight rod connection.

[0042] An end cap 11 is provided at the open end of the outer sleeve 1. A connecting hole 111 is provided at the center of the end cap 11, and the extension rod 21 passes through the connecting hole 111 of the end cap 11, so as to realize the up and down movement simultaneously.

[0043] At this time, the outer end of the outer sleeve 1 is provided with a first connecting part 12 protruding outward, and the connecting part 11 and the outer sleeve 1 are formed into an integral cavity structure by mechanical or adhesive means, which can ensure the overall structural strength of the outer sleeve 1. During use, the volume between the outer sleeve 1 and the inner sleeve 2 changes rapidly, forming relative resistance (i.e., relative resistance due to pressure difference on both sides). Through this pressure difference resistance, the damping between the outer sleeve 1 and the inner sleeve 2 is completed. Example

[0044] like Figures 5-7 As shown, in this embodiment, the inner sleeve 2 is a cylindrical structure with one end closed (similar to the outer sleeve 1), and the open end of the inner sleeve 2 is inserted into the bottom of the outer sleeve 1, while a gap 101 is formed between the outer wall of the inner sleeve 2 and the inner wall of the outer sleeve 1.

[0045] The inner sleeve 2 is provided with a second connecting part 23 on the outer side of the end of the closed section, so that the second connecting part 23 and the inner sleeve 2 are integrally formed.

[0046] A first connecting part 12 protruding outward is provided at the outer end of the outer sleeve 1, and the connecting part 11 and the outer sleeve 1 are formed into an integral cavity structure by mechanical or adhesive means, which can ensure the overall structural strength of the outer sleeve 1. Since a long contact surface (non-time contact) is formed between the outer wall of the inner sleeve 2 and the inner wall of the outer sleeve 1, when the relative position of the inner sleeve 2 and the outer sleeve 1 changes, the gas can only overflow through the gap between the inner sleeve 2 and the outer sleeve 1. At this time, the contact surface between the inner sleeve 2 and the outer sleeve 1 is long, which causes the gas overflow speed to change (i.e., lengthen), thus forming a large damping. At this time, the gap between the inner sleeve 2 and the outer sleeve 1 is always maintained, so the friction between the two is very small, and only air friction exists.

[0047] A pin hole 201 is provided in the circumferential direction where the first connecting part 12 and the second connecting part 23 are located, and the parts are respectively connected to external connectors through the pin holes 201. This method can effectively realize the connection with external components and reduce the risk of detachment.

[0048] In this embodiment, the dimensions described in Table 1 are used, thereby ensuring that the inner sleeve 2 can change linearly along the inner wall of the outer sleeve 1 throughout the entire operation, which solves the problem of nonlinear changes caused by fluctuations in the traditional solution.

[0049]

[0050] This method ensures the uniformity of the duct's movement when connected to air conditioning ducts, reducing duct fluctuations that often occur when the airflow velocity changes within the duct.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An air-type damper, comprising an outer sleeve (1) and an inner sleeve (2), characterized in that, Both the outer sleeve (1) and the inner sleeve (2) have a straight tubular structure; The outer sleeve (1) has a closed structure at one end and an open structure at the other end, so that the outer sleeve (1) as a whole forms a cylindrical structure with only one end connected to the outside. The inner sleeve (2) is inserted into the bottom of the outer sleeve (1), and a gap (101) is formed between the inner wall of the outer sleeve (1) and the outer wall of the inner sleeve (2), so that the inner sleeve (2) moves linearly along the central cavity where the outer sleeve (1) is located. The distance between the gap (101) and the diameter of the inner sleeve (2) is 1 / 200 to 1 / 100.

2. The air-type damper according to claim 1, characterized in that, The inner sleeve (2) includes an extension rod (22) and a piston (21). The piston (21) is inserted into the inner sleeve (1) and slides, while a gap (101) is formed between the inner wall of the outer sleeve (1) and the outer wall of the piston (21). One end of the extension rod (22) is connected to the piston (21), and the other end extends outward from the opening side of the outer sleeve (1).

3. The air-type damper according to claim 2, characterized in that, One end of the extension rod (22) is fixed to the central axis of the piston (21) by means of a locking bolt, and the other end extending out of the outer sleeve (1) is set in a bent shape.

4. The air-type damper according to claim 2, characterized in that, The extended end of the extension rod (22) has a degree of freedom in its position relative to the centerline of the piston (21).

5. The air-type damper according to claim 2, characterized in that, An end cap (11) is provided at the open end of the outer sleeve (1), and a connecting hole (111) is provided at the center of the end cap (11), so that the extension rod (22) can pass through the connecting hole (111) of the end cap (11) and move in the up and down directions simultaneously.

6. The air-type damper according to claim 1, characterized in that, The inner sleeve (2) is a cylindrical structure with one end closed, and the open end of the inner sleeve (2) is inserted into the bottom of the outer sleeve (1), while a gap (101) is formed between the outer wall of the inner sleeve (2) and the inner wall of the outer sleeve (1).

7. The air-type damper according to claim 6, characterized in that, The inner sleeve (2) is provided with a second connecting part (23) on the outer side of the end of the closed section, so that the second connecting part (23) and the inner sleeve (2) are integrally formed.

8. The air-type damper according to claim 1, characterized in that, A coating (102) is attached to the inner wall of the outer sleeve (1) and the outer wall of the inner sleeve (2), and the coating (102) is a polytetrafluoroethylene layer.

9. The air-type damper according to claim 5, characterized in that, A first connecting part (12) is provided at the outer end of the outer sleeve (1), and the end cap (11) and the outer sleeve (1) are integrated into a cavity structure.

10. The air-type damper according to claim 9, characterized in that, A pin hole (201) is provided in the circumferential direction where the first connecting part (12) and the second connecting part (23) are located, and the pin hole (201) is used to connect to the external connecting parts respectively.

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