An air outlet pipe

Abstract

An air outlet duct includes an air outlet duct body with a spiral groove formed on its outer peripheral wall. A first retaining ring, a second retaining ring, and a fixing ring are installed on the air outlet duct body. The first and second retaining rings are sleeved on the outside of the air outlet duct body and confined within the spiral groove. The fixing ring is sleeved on the outer periphery of the first and second retaining rings and fixed between them. The advantages of this invention are: during installation, users can adjust the number of pleats between the first and second retaining rings according to their kitchen environment, achieving length adjustment without cutting the air outlet duct. The structure is highly reliable, ensuring the air outlet duct does not become elongated during range hood operation, solving the problem of difficult length adjustment associated with glue-filled range hood interfaces. Furthermore, rotating the fixing ring allows the entire module to move along the spiral direction of the air outlet duct, making operation very convenient.

Description

Technical Field

[0001] This utility model relates to an air outlet pipe. Background Technology

[0002] The air outlet of a conventional range hood is generally installed on an exhaust hood, which houses the exhaust pipe through which cooking fumes are expelled. To ensure a tight seal and prevent noise caused by excessive pipe length and swaying, the exhaust pipe of conventional range hoods is typically fixed using one of two methods: First, the aluminum foil exhaust pipe is a separate material, cut to the appropriate length by a service technician, ensuring it is taut when connected to the exhaust hood. The pipe joint is then sealed with tape or other sealing materials. Second, the aluminum foil exhaust pipe and exhaust hood are pre-sealed with adhesive before leaving the factory. The service technician only needs to fix the exhaust hood to the range hood; no pipe cutting is required. Excess aluminum foil pipe length is usually compressed and temporarily secured with tape.

[0003] However, the aforementioned fixing and limiting methods have significant drawbacks. For the method of cutting the flue pipe and sealing it with tape, the sealing effect of the tape is difficult to guarantee effectively. With long-term use, grease can easily seep from the joint, affecting the cleanliness of the kitchen environment and potentially contaminating other components. For the method of sealing the outlet pipe and outlet hood with glue without cutting the flue pipe, compressing the excess pipe length and securing it with tape, the adhesive strength of the tape gradually becomes insufficient to withstand the strong airflow pressure as the maximum static pressure performance of range hoods continues to increase, leading to tape detachment. Furthermore, the unclamped aluminum foil pipe will sway under the influence of airflow, not only producing noise and disturbing the user's daily life, but also potentially causing the flue pipe to break due to contact with sharp objects during swaying, affecting the range hood's smoke extraction efficiency and lifespan, posing a significant safety hazard. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an air outlet pipe that is easy to adjust in length and has high structural reliability, in light of the above-mentioned existing technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an air outlet pipe, including an air outlet pipe body, wherein a spiral groove is formed on the outer peripheral wall of the air outlet pipe body, characterized in that: a first retaining ring, a second retaining ring and a fixing ring are installed on the air outlet pipe body, the first retaining ring and the second retaining ring are sleeved on the outside of the air outlet pipe body, the first retaining ring and the second retaining ring are limited in the spiral groove of the air outlet pipe body, and the fixing ring is sleeved on the outer peripheral part of the first retaining ring and the second retaining ring and fixed between the first retaining ring and the second retaining ring.

[0006] The first retaining ring and the second retaining ring can have various installation structures. Preferably, the outer ends of the first retaining ring and the second retaining ring have a spiral structure that limits them within the spiral groove, and the inner ends of the first retaining ring and the second retaining ring are limited on the fixing ring.

[0007] In order to make the first retaining ring and the second retaining ring abut against the fixed ring, the inner peripheral wall of the fixed ring is provided with a first annular boss and a second annular boss protruding inward. The inner end of the first retaining ring abuts against the first annular boss, and the inner end of the second retaining ring abuts against the second annular boss.

[0008] Further preferably, the outer peripheral wall of the fixing ring has a radially concave annular groove, and correspondingly, the first annular boss and the second annular boss are formed on the inner peripheral wall of the fixing ring.

[0009] There are various ways to secure the retaining ring and the snap ring. Preferably, the retaining ring and the first snap ring, as well as the retaining ring and the second snap ring, are connected by threads. This arrangement, with the threaded connection between the retaining ring and the snap ring, provides better reliability and can withstand greater airflow pressure.

[0010] To facilitate adjustment of the number of pleats in the air outlet pipes within the first and second retaining rings, detachable buckles are provided at both ends of the first and second retaining rings.

[0011] In order to ensure that the first and second retaining rings can be smoothly fitted onto the air outlet pipe body, the inner diameter of the first and second retaining rings is larger than the outer diameter of the air outlet pipe body.

[0012] Compared with existing designs, the advantages of this utility model are as follows: When installing the air outlet duct, users can adjust the number of pleats between the first and second retaining rings according to their own kitchen environment. The length of the air outlet duct can be adjusted without cutting the length of the air outlet duct. Moreover, the structure has high reliability, ensuring that the air outlet duct will not be blown too long when the range hood is running. This solves the problem of difficult length adjustment of the range duct duct corresponding to the glue-filling solution for the range duct interface. Furthermore, rotating the fixing ring can move the entire module along the spiral direction of the air outlet duct, making the operation very convenient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the air outlet pipe according to an embodiment of the present utility model;

[0014] Figure 2 for Figure 1 An exploded view of the air outlet duct shown.

[0015] Figure 3 for Figure 1 The sectional view of the air outlet duct shown;

[0016] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figures 1 to 4 As shown, the air outlet duct of this embodiment includes an air outlet duct body 1, which is a conventional aluminum foil smoke duct. A spiral groove 11 is formed on the outer peripheral wall of the air outlet duct body 1. A first retaining ring 21, a second retaining ring 22, and a fixing ring 3 are installed on the air outlet duct body 1. The first retaining ring 21 and the second retaining ring 22 are sleeved on the outside of the air outlet duct body 1, and the inner diameter of the first retaining ring 21 and the second retaining ring 22 is larger than the outer diameter of the air outlet duct body 1. The outer ends of the first retaining ring 21 and the second retaining ring 22 have matching spiral structures 23, which are confined within the spiral groove 11. Typically, the spiral structure pitch is 15mm, which matches the thickness of a single layer of pleats (wire diameter + two layers of aluminum foil) in a conventional air outlet duct. Utilizing the spiral characteristics of a conventional aluminum foil smoke duct and using a spiral structure for confinement is relatively reliable and not easily detached.

[0019] The fixing ring 3 is sleeved on the outer periphery of the first retaining ring 21 and the second retaining ring 22 and fixed between the first retaining ring 21 and the second retaining ring 22. In this embodiment, the fixing ring 3 is engaged with the first retaining ring 21 and the fixing ring 3 is engaged with the second retaining ring 22 by the thread 4, which has better reliability, can withstand greater airflow pressure, and does not require auxiliary tools during installation, making the operation very convenient.

[0020] The inner ends of the first retaining ring 21 and the second retaining ring 22 are positioned on the fixing ring 3. Specifically, the outer peripheral wall of the fixing ring 3 has a radially concave annular groove 33, and correspondingly, a first annular boss 31 and a second annular boss 32 are formed on the inner peripheral wall of the fixing ring 3. The inner end of the first retaining ring 21 abuts against the first annular boss 31, and the inner end of the second retaining ring 22 abuts against the second annular boss 32.

[0021] In addition, both ends of the first retaining ring 21 and the second retaining ring 22 are provided with detachable buckles 24.

[0022] During installation, the connection ring 5 between the exhaust duct body 1 and the exhaust hood is sealed with glue to prevent oil from leaking out of the connection interface. Operators do not need to cut the exhaust duct; simply adjust it to the appropriate length and adjust the number of pleats in the upper and lower retaining rings according to kitchen conditions to keep the exhaust duct taut and secure. When adjusting the number of pleats at the limit position, the detachable clips 24 at both ends of the retaining rings can be used for quick fixing or disassembly. When adjusting the vertical, horizontal, and vertical position of the entire limit module within the exhaust duct body 1, the fixing ring 3 can be rotated by hand to move the entire module along the spiral direction of the exhaust duct body 1.

[0023] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An air outlet duct, comprising an air outlet duct body (1), wherein a spiral groove (11) is formed on the outer peripheral wall of the air outlet duct body (1), characterized in that: A first retaining ring (21), a second retaining ring (22), and a fixing ring (3) are installed on the air outlet duct body (1). The first retaining ring (21) and the second retaining ring (22) are sleeved on the outside of the air outlet duct body (1). The first retaining ring (21) and the second retaining ring (22) are limited in the spiral groove (11) of the air outlet duct body (1). The fixing ring (3) is sleeved on the outer periphery of the first retaining ring (21) and the second retaining ring (22) and fixed between the first retaining ring (21) and the second retaining ring (22).

2. The air outlet duct according to claim 1, characterized in that: The outer ends of the first retaining ring (21) and the second retaining ring (22) have a spiral structure (23) that is limited within the spiral groove (11), and the inner ends of the first retaining ring (21) and the second retaining ring (22) are limited on the fixing ring (3).

3. The air outlet duct according to claim 2, characterized in that: The inner circumferential wall of the fixing ring (3) is provided with a first annular boss (31) and a second annular boss (32) protruding inward. The inner end of the first retaining ring (21) abuts against the first annular boss (31), and the inner end of the second retaining ring (22) abuts against the second annular boss (32).

4. The air outlet duct according to claim 3, characterized in that: The outer peripheral wall of the fixing ring (3) has a radially concave annular groove (33), and correspondingly, the first annular boss (31) and the second annular boss (32) are formed on the inner peripheral wall of the fixing ring (3).

5. The air outlet duct according to claim 1, characterized in that: The fixed ring (3) and the first retaining ring (21) are connected by threads (4), as are the fixed ring (3) and the second retaining ring (22).

6. The air outlet duct according to claim 5, characterized in that: The first retaining ring (21) and the second retaining ring (22) are provided with detachable buckles (24) at both ends.

7. The air outlet duct according to any one of claims 1 to 6, characterized in that: The inner diameter of the first retaining ring (21) and the second retaining ring (22) is larger than the outer diameter of the air outlet pipe body (1).

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