Ceiling air pipe elbow

Abstract

The ceiling air pipe elbow comprises a vertical pipe and a transverse pipe, a pipe connecting section and an oval pipe section used for being connected with an air pipe are formed on the transverse pipe, one end of the pipe connecting section is connected with the upper end of the vertical pipe, the other end corresponding to the pipe connecting section is communicated with the oval pipe section, a short shaft of the oval pipe section is vertically arranged, and the oval pipe section is arranged close to the lower portion relative to the pipe connecting section. According to the ceiling air pipe elbow, the situation that the space occupied by the ceiling air pipe elbow in the vertical direction is increased due to the fact that the ventilation sectional area of the oval pipe section is increased can be avoided, and therefore an air pipe with the large ventilation sectional area can be arranged above a ceiling.

Description

Technical Field

[0001] The utility model relates to the field of air duct elbows, in particular to a ceiling air duct elbow. Background Art

[0002] At present, in indoor ventilation applications (such as internal circulation or external circulation, or bathroom heater, heating system, etc.), air ducts (usually hoses) need to be arranged above the ceiling, ventilation holes are opened on the ceiling, and ventilation interfaces are installed at the ventilation holes. Since the air flow flows through the ventilation holes in the ceiling in the vertical direction, but the air duct needs to be arranged horizontally, a duct elbow must be set on the upper side of the ventilation hole, one end (lower end) of the air duct elbow is connected to the ventilation interface, and the other end of the air duct elbow is connected to the air duct. However, since the distance from the ceiling to the roof of the house is limited, if the inner diameter of the other end corresponding to the above-mentioned air duct elbow is set larger, it will interfere with the top of the ceiling or the roof of the house, which is not conducive to the arrangement of air ducts with a larger ventilation cross-sectional area above the ceiling. Therefore, it is necessary to improve the air duct elbow structure of the existing technology. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a ceiling air duct elbow, which is conducive to arranging an air duct with a larger ventilation cross-sectional area above the ceiling.

[0004] The purpose of this utility model is achieved through the following technical solutions.

[0005] The ceiling air duct elbow disclosed in the present utility model includes a vertical pipe and a horizontal pipe, wherein the horizontal pipe is formed with a connecting pipe section and an elliptical pipe section for connecting the air duct, one end of the connecting pipe section is connected to the upper end of the vertical pipe, and the other end corresponding to the connecting pipe section is connected to the elliptical pipe section, the short axis of the elliptical pipe section is arranged upright, and the elliptical pipe section is arranged lower than the connecting pipe section.

[0006] Preferably, the connecting pipe section is set as a cylindrical pipe section, and the cross tube forms a variable cross-section pipe section between the connecting pipe section and the elliptical pipe section. The top of the elliptical pipe section is set flush with the top of the connecting pipe section, and the short axis of the elliptical pipe section is larger than the diameter of the connecting pipe section.

[0007] Preferably, circumferentially extending ribs are formed on the outer wall of the elliptical tube segment.

[0008] Preferably, a support rod is screwed onto the lower side of one end of the variable cross-section pipe section that is relatively close to the elliptical pipe section.

[0009] Preferably, an outer rounded corner is formed between the connecting pipe section and the vertical pipe.

[0010] Compared with the prior art, the utility model has the following beneficial effects: a connecting pipe section and an elliptical pipe section for connecting the air duct are formed by arranging a horizontal pipe, one end of the connecting pipe section is connected to the upper end of the vertical pipe, and the other end corresponding to the connecting pipe section is connected to the elliptical pipe section. The short axis of the elliptical pipe section is arranged upright, and the elliptical pipe section is arranged lower than the connecting pipe section, which can avoid increasing the space occupied by the ceiling air duct elbow in the upper and lower directions due to increasing the ventilation cross-sectional area of ​​the elliptical pipe section, thereby facilitating the arrangement of an air duct with a larger ventilation cross-sectional area above the ceiling, making the installation of internal circulation or external circulation or bathroom heater, warm air and other systems more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the ceiling air duct elbow and ceiling combination of the present utility model.

[0012] Figure 2 This is an exploded schematic diagram of the ceiling air duct elbow and ceiling ventilation interface of the present utility model.

[0013] Figure 3 It is a side view of the ceiling air duct elbow of the present utility model.

[0014] Figure 4 It is a schematic diagram of the three-dimensional structure of the ceiling air duct elbow of the present utility model.

[0015] Explanation of reference numerals: vertical pipe 1; screw-on protrusion 101; outer rounded corner portion 11; horizontal pipe 2; connecting pipe section 21; variable cross-section pipe section 22; mounting block 221; elliptical pipe section 23; convex rib 231; support rod 3; ceiling ventilation interface 98; screw-on groove 981; ceiling 99; air duct 97. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] The ceiling duct elbow of the utility model is as follows Figures 1 to 4As shown, it includes a vertical pipe 1 and a horizontal pipe 2. The horizontal pipe 2 is formed with a connecting pipe section 21 and an elliptical pipe section 23 for connecting the air duct 97. In other words, the cross-section of the elliptical pipe section 23 is elliptical in shape. One end of the connecting pipe section 21 is connected to the upper end of the vertical pipe 1. For example, the ceiling air duct elbow can be made of plastic, so the connecting pipe section 21 and the vertical pipe 1 can be connected as one piece, and the other end corresponding to the connecting pipe section 21 is connected to the elliptical pipe section 23. The short axis of the elliptical pipe section 23 is set upright, that is, in actual application, the long axis of the elliptical pipe section 23 is set horizontally, that is, the elliptical pipe section 23 is lying, and the elliptical pipe section 23 is set lower relative to the connecting pipe section 21, that is, the top of the elliptical pipe section 23 does not exceed the top of the connecting pipe section 21 upward. For example, the connecting pipe section 21 is set as a cylindrical pipe section; if the minor axis of the elliptical pipe section 23 is equal to the diameter of the connecting pipe section 21, the top of the elliptical pipe section 23 can be flush with the top of the connecting pipe section 21 and the bottom of the elliptical pipe section 23 is flush with the bottom of the connecting pipe section 21; if the minor axis of the elliptical pipe section 23 is larger than the diameter of the connecting pipe section 21, the bottom of the elliptical pipe section 23 protrudes downward relative to the bottom of the connecting pipe section 21, and the top of the elliptical pipe section 23 can be flush with the top of the connecting pipe section 21 or slightly lower than the top of the connecting pipe section 21; in addition, the minor axis of the elliptical pipe section 23 can also be slightly smaller than the diameter of the connecting pipe section 21. In this case, in the vertical direction, the elliptical pipe section 23 is located within the corresponding range of the connecting pipe section 21. Figure 1 As shown, since the minor axis of the elliptical tube segment 23 is arranged vertically, the ventilation cross-section of the elliptical tube segment 23 can be expanded laterally, thereby avoiding increasing the space occupied by the ceiling duct elbow in the vertical direction due to increasing the ventilation cross-sectional area of ​​the elliptical tube segment 23. In addition, since the elliptical tube segment 23 is arranged lower than the connecting tube segment 21, the total height of the ceiling duct elbow is relatively reduced. Figure 3 The diagram schematically shows a structure in which the end of the air duct 97 is sleeved outside the elliptical pipe section 23. When the air duct 97 is a hard pipe, the cross-sectional shape of the air duct 97 can be set to an elliptical shape. When the air duct 97 is a soft pipe, the end of the air duct 97 can be flattened and sleeved onto the elliptical pipe section 23, and the body of the air duct 97 can also be flattened (approximately elliptical) and set between the ceiling 99 and the roof of the house. The air duct 97 described above can have a larger ventilation cross-sectional area. Therefore, the ceiling air duct elbow of the present invention is conducive to the arrangement of air ducts with a larger ventilation cross-sectional area above the ceiling, which is conducive to enhancing the ventilation effect and making the installation of internal circulation or external circulation or bathroom heaters, warm air and other systems more flexible and convenient.

[0018] In some embodiments, as Figure 3 and Figure 4As shown, the connecting pipe section 21 is set as a cylindrical pipe section, that is, the cross-section of the connecting pipe section 21 is circular, and the cross pipe 2 is formed with a variable-section pipe section 22 between the connecting pipe section 21 and the elliptical pipe section 23. That is to say, one end of the variable-section pipe section 22 is circular, and the other end corresponding to the variable-section pipe section 22 is elliptical. The top of the elliptical pipe section 23 is set flush with the top of the connecting pipe section 21, and the short axis of the elliptical pipe section 23 is larger than the diameter of the connecting pipe section 21, so that the bottom of the elliptical pipe section 23 protrudes relatively downward from the bottom of the connecting pipe section 21. Since the top of the elliptical pipe section 23 is set flush with the top of the connecting pipe section 21, the space of the ceiling duct elbow in the upper and lower directions can be fully utilized to set the short axis of the elliptical pipe section 23 as long as possible. Setting the connecting pipe section 21 as a cylindrical pipe section is beneficial to reducing wind resistance and also helps to make the shape of the connecting pipe section 21 close to the elliptical pipe section 23, avoiding the difficulty in manufacturing the variable cross-section pipe section 22; therefore, the outer shape of the vertical pipe 1 is correspondingly set to be cylindrical, and the axis of the vertical pipe 1 intersects the axis of the connecting pipe section 21 at right angles.

[0019] like Figure 1 and Figure 2 As shown, for example, the lower end of the vertical pipe 1 is formed with a screw-lock protrusion 101, and four screw-lock protrusions 101 are evenly distributed around the circumference. The upper end of the ceiling ventilation interface 98 is formed with a screw-lock groove 981, and the screw-lock protrusions 101 are engaged with corresponding screw-lock grooves 981. The ceiling ventilation interface 98 is set through the ceiling 99.

[0020] Further, if Figure 4 As shown, the outer wall of the elliptical tube section 23 is formed with circumferentially extending ribs 231. Figure 3 As shown, when the air duct 3 is sleeved outside the elliptical tube section 23, a throat clamp is used to tie the end of the air duct 3, and the ribs 231 can axially block the throat clamp to prevent the air duct 3 from separating from the elliptical tube section 23.

[0021] Further, if Figure 1 and Figure 2 As shown, the lower side of one end of the variable cross-section pipe section 22 relatively close to the elliptical pipe section 23 is screwed with a support rod 3, specifically, as shown in FIG. Figure 3 As shown, a mounting block 221 is formed at the bottom of the variable cross-section pipe section 22, and the upper portion of the support rod 3 is screwed to the mounting block 221, as shown in FIG. Figure 1As shown, the lower end of the support rod 3 can contact the ceiling 99 or the keel (note that the keel is not shown in the various figures). Therefore, the ceiling 99 or the keel can better support the weight of the elliptical tube segment 23, thereby preventing the gravity of the elliptical tube segment 23 from exerting a large torque on the ceiling ventilation interface 98 and preventing the ceiling ventilation interface 98 from being tilted. When the support rod 3 is rotated, the height position of the support rod 3 can be adjusted, thereby slightly adjusting the height position of the elliptical tube segment 23. The support rod 3 can be a hexagonal bolt, that is, the support rod 3 includes a hexagonal head that can contact the ceiling 99 or the keel.

[0022] Further, if Figure 3 As shown, an outer rounded corner portion 11 is formed between the connecting pipe section 21 and the vertical pipe 1. In other words, the outer rounded corner portion 11 is provided on the outside of the corner between the connecting pipe section 21 and the vertical pipe 1. Due to the inertia of the airflow, when the airflow flows from the connecting pipe section 21 to the vertical pipe 1 (or from the vertical pipe 1 to the connecting pipe section 21), the airflow scours the outside of the corner between the connecting pipe section 21 and the vertical pipe 1 to a greater extent. Therefore, by providing the outer rounded corner portion 11, the airflow can be reversed more smoothly, which is beneficial to reducing wind resistance.

Claims

1. A ceiling air duct elbow, comprising a vertical pipe (1) and a horizontal pipe (2), characterized in that: The horizontal pipe (2) is formed with a connecting pipe section (21) and an elliptical pipe section (23) for connecting to the air duct (97). One end of the connecting pipe section (21) is connected to the upper end of the vertical pipe (1), and the other end of the connecting pipe section (21) is connected to the elliptical pipe section (23). The short axis of the elliptical pipe section (23) is arranged upright, and the elliptical pipe section (23) is arranged lower than the connecting pipe section (21).

2. The ceiling duct elbow according to claim 1, characterized in that: The connecting pipe section (21) is configured as a cylindrical pipe section, and the transverse pipe (2) forms a variable cross-section pipe section (22) between the connecting pipe section (21) and the elliptical pipe section (23). The top of the elliptical pipe section (23) is flush with the top of the connecting pipe section (21), and the minor axis of the elliptical pipe section (23) is greater than the diameter of the connecting pipe section (21).

3. The ceiling duct elbow according to claim 1 or 2, characterized in that: A circumferentially extending convex rib (231) is formed on the outer wall of the elliptical tube section (23).

4. The ceiling duct elbow according to claim 2, characterized in that: A support rod (3) is screwed to the lower side of one end of the variable cross-section pipe section (22) that is relatively close to the elliptical pipe section (23).

5. The ceiling duct elbow according to claim 1 or 2, characterized in that: An outer rounded corner portion (11) is formed between the connecting pipe section (21) and the vertical pipe (1).

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