Exhaust pipe assembly for noise reduction of magnetic suspension centrifugal refrigerating unit

Abstract

The utility model relates to the technical field of exhaust pipe design, and discloses an exhaust pipe assembly for noise reduction of a magnetic suspension centrifugal refrigerating unit, the exhaust pipe assembly comprises a taper pipe, an elbow and a straight pipe which are connected in sequence, the taper of the taper pipe is 6-9 degrees, and the elbow is a long-radius reducing elbow, a long-radius elbow or a short-radius elbow. The exhaust pipe assembly adopts the form of the taper pipe, the elbow and the straight pipe, so that the noise of the exhaust pipe can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust pipe design technical field, specifically, relate to a kind of exhaust pipe assembly for magnetic suspension centrifugal refrigerating unit noise reduction. BACKGROUND

[0002] At present, the exhaust pipe of magnetic suspension centrifugal refrigerating unit generally faces the technical pain point of airflow noise exceeding standard, and the conventional scheme of the industry is the straight pipe+elbow+straight pipe mode of equal-diameter exhaust outlet or the form connected to condenser using sudden expansion type variable diameter+elbow+straight pipe. Such design generally leads to larger noise, and when the sound is larger, it can reach more than 100 decibels. The noise of such refrigeration equipment is difficult for users to use satisfactorily. SUMMARY

[0003] The utility model provides a kind of exhaust pipe assembly for magnetic suspension centrifugal refrigerating unit noise reduction in view of the deficiency of prior art, effectively control exhaust pipe noise by the form of taper pipe+elbow+straight pipe.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] An exhaust pipe assembly for magnetic suspension centrifugal refrigerating unit noise reduction, the exhaust pipe assembly comprises a taper pipe, an elbow and a straight pipe connected in sequence, the taper of the taper pipe is 6-9°, the taper is the conical angle of the taper when the taper pipe is viewed from the side, and the end of the elbow connected with the taper pipe is the taper pipe end, and the end connected with the straight pipe is the straight pipe end.

[0006] The gradually expanding taper pipe gradually increases the pipe cross-sectional area, smoothly reduces the gas velocity, and can effectively reduce the noise caused by airflow impact and vortex.

[0007] Preferably, the nominal diameter of the taper pipe end is DN50-DN200.

[0008] Preferably, the nominal diameter of the straight pipe end is DN80-DN250.

[0009] Preferably, the curvature radius of the elbow is 120-375mm.

[0010] Preferably, the length of the taper pipe is 300-450mm.

[0011] Preferably, when the elbow is a long-radius reducing elbow, the nominal diameter of the long-radius reducing elbow is in a gradually changing form, the nominal diameter of the straight pipe end is 1.2-1.6 times the nominal diameter of the taper pipe end, and the curvature radius of the elbow is 1.5 times the nominal diameter of the straight pipe end. The reducing elbow can further effectively reduce the noise of the exhaust pipe.

[0012] Preferably, the straight pipe end nominal diameter is 1.5 times the taper pipe end nominal diameter.

[0013] Preferably, when the elbow is a long radius elbow, the straight pipe end nominal diameter is 1.0 times the taper pipe end nominal diameter, and the elbow radius of curvature is 1.5 times the straight pipe end nominal diameter.

[0014] Preferably, when the elbow is a short radius elbow, the straight pipe end nominal diameter is 1.0 times the taper pipe end nominal diameter, and the elbow radius of curvature is 1.0 times the straight pipe end nominal diameter.

[0015] The utility model provides a kind of exhaust pipe assembly for magnetic suspension centrifugal refrigerating unit noise reduction, the exhaust pipe assembly adopts the form of taper pipe+elbow+straight pipe, elbow adopts long radius reducing elbow, long radius elbow or short radius elbow, the exhaust pipe assembly of this form can effectively reduce exhaust pipe noise. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic view of exhaust pipe assembly for example 1.

[0017] Figure 2 It is the structural schematic view of exhaust pipe assembly for example 2.

[0018] Figure 3 It is the structural schematic view of exhaust pipe assembly for example 3. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments will be described clearly and completely in combination with the utility model embodiments, and obviously, the described embodiments are only part of the utility model embodiments, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0020] In the description of the present application, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0021] As Figures 1-3As shown, an exhaust pipe assembly for noise reduction in a magnetic levitation centrifugal chiller unit includes a tapered pipe 1, an elbow 2, and a straight pipe 3 connected in sequence. The tapered pipe 1 has a taper of 6-9° and a length of 300-450 mm. The elbow 2 is connected to the tapered pipe 1 at one end (tapered end 21) and to the straight pipe 3 at the other end (straight pipe end 22). The nominal diameter of the tapered pipe end 21 is DN50-DN200, the nominal diameter of the straight pipe end 22 is DN80-DN250, and the radius of curvature of the elbow 2 is 120 mm-375 mm.

[0022] When elbow 2 is a long-radius reducing elbow, the nominal diameter of the straight pipe end 22 is 1.2 to 1.6 times the nominal diameter of the tapered pipe end 21, and the radius of curvature of elbow 2 is 1.5 times the nominal diameter of the straight pipe end 22.

[0023] When elbow 2 is a long radius elbow, the nominal diameter of the straight pipe end 22 is 1.0 times the nominal diameter of the tapered pipe end 21, and the radius of curvature of elbow 2 is 1.5 times the nominal diameter of the straight pipe end 22.

[0024] When elbow 2 is a short radius elbow, the nominal diameter of the straight pipe end 22 is 1.0 times the nominal diameter of the tapered pipe end 21, and the radius of curvature of elbow 2 is 1.0 times the nominal diameter of the straight pipe end 22.

[0025] The design of tapered pipe + elbow + straight pipe can effectively reduce the noise of the exhaust pipe assembly.

[0026] Example 1

[0027] like Figure 1 As shown, elbow 2 is a long-radius reducing elbow, tapered pipe 1 has a taper of 6° and a length of 300mm, straight pipe 3 has a length of 450mm, straight pipe end 22 has a nominal diameter of 150mm, tapered pipe end 21 has a nominal diameter of 100mm, and elbow 2 has a radius of curvature of 225mm.

[0028] Example 2

[0029] like Figure 2 As shown, elbow 2 is a long radius elbow, tapered pipe 1 has a taper of 6° and a length of 300mm, straight pipe 3 has a length of 500mm, elbow 2 has a nominal diameter of 100mm (i.e., nominal diameter of straight pipe end 22 = nominal diameter of tapered pipe end 21 = 100mm), and a radius of curvature of 150mm.

[0030] Example 3

[0031] like Figure 3As shown, the elbow 2 adopts a short radius elbow, the taper of the taper pipe 1 is 6°, the length is 300mm, the length of the straight pipe 3 is 500mm, the nominal diameter of the elbow 2 can be 100mm (i.e. the nominal diameter of the straight pipe end 22=taper pipe end 21=100mm), and the curvature radius can be 100mm.

[0032] Tests show that the noise of the embodiment 1 is reduced by 10% and 15% compared with the embodiment 1 and the embodiment 2.

[0033] The above is the description of the embodiments of the present application, through the above description of the disclosed embodiments, the person skilled in the art can realize or use the present application. Various modifications of these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An exhaust pipe assembly for a magnetic levitation centrifugal chiller unit for noise reduction, characterized in that, The exhaust pipe assembly comprises a taper pipe (1), an elbow (2), and a straight pipe (3) connected in sequence, the taper of the taper pipe (1) is 6-9°, the elbow (2) is connected with the taper pipe (1) at one end as a taper pipe end (21), and is connected with the straight pipe (3) at the other end as a straight pipe end (22).

2. The exhaust pipe assembly for noise reduction of a magnetic levitation centrifugal refrigeration unit according to claim 1, characterized in that, The nominal diameter of the taper pipe end (21) is DN50-DN200.

3. The exhaust pipe assembly for a magnetic levitation centrifugal chiller unit according to claim 1, wherein, The nominal diameter of the straight pipe end (22) is DN80-DN250.

4. The exhaust pipe assembly for a magnetic levitation centrifugal chiller unit according to claim 1, wherein, The curvature radius of the elbow (2) is 120mm-375mm.

5. The exhaust pipe assembly for a magnetic levitation centrifugal chiller unit noise reduction of claim 1, wherein, The length of the taper pipe (1) is 300-450mm.

6. The exhaust pipe assembly for a magnetic levitation centrifugal chiller unit noise reduction of claim 1, wherein, When the elbow (2) is a long radius reducer, the nominal diameter of the long radius reducer is in a gradual change form, the nominal diameter of the straight pipe end (22) is 1.2-1.6 times of the nominal diameter of the taper pipe end (21), and the curvature radius of the elbow (2) is 1.5 times of the nominal diameter of the straight pipe end (22).

7. The exhaust pipe assembly for noise reduction of a magnetic levitation centrifugal refrigeration unit according to claim 6, characterized in that, The nominal diameter of the straight pipe end (22) is 1.5 times of the nominal diameter of the taper pipe end (21).

8. The exhaust pipe assembly for a magnetic levitation centrifugal chiller unit noise reduction of claim 1, wherein, When the elbow (2) is a long radius elbow, the nominal diameter of the straight pipe end (22) is 1.0 times of the nominal diameter of the taper pipe end (21), and the curvature radius of the elbow (2) is 1.5 times of the nominal diameter of the straight pipe end (22).

9. The exhaust pipe assembly for a magnetic levitation centrifugal chiller unit noise reduction of claim 1, wherein, When the elbow (2) is a short radius elbow, the nominal diameter of the straight pipe end (22) is 1.0 times of the nominal diameter of the taper pipe end (21), and the curvature radius of the elbow (2) is 1.0 times of the nominal diameter of the straight pipe end (22).

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