Nozzle of vortex tube

A technology of vortex tubes and nozzles, which is applied in the field of refrigeration, and can solve the problems of large energy loss, small unit cooling capacity, and low energy separation efficiency

Inactive Publication Date: 2005-10-26
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of large energy loss, small unit cooling capacity and low energy separation efficiency of the existing vortex tube, the present invention proposes a vortex tube nozzle, which can improve the cooling temperature effect of the vortex tube on the one hand; on the other hand, It can increase the cold flow rate when the vortex tube reaches the maximum cooling temperature effect, thereby increasing the unit cooling capacity and refrigeration coefficient of the vortex tube

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In this implementation, compared with the existing common nozzles, only the profile line of the nozzle runner 1 is changed, as shown in the attached Figure 8 , with Figure 9 As shown, the nozzle 6 of the present invention is integrated with the cold end pipe 4 of the vortex tube, and as a replaceable part, it is loaded into the corresponding position of the vortex tube. The Mach number at the outlet of the nozzle flow channel is 0.57, and the Mach number at the inlet is 0.19.

[0048] Ordinary rectangular nozzle size: cold air hole diameter 5.6mm, vortex chamber diameter 13mm, nozzle outer circumference diameter 20mm, nozzle runner groove width L=2mm, nozzle runner groove depth H=1mm, nozzle material is plexiglass.

[0049] Archimedes spiral nozzle: the size and material are the same as ordinary rectangular nozzles

[0050] The size of the nozzle of the present invention: the groove width L at the inlet of the nozzle flow channel e =3mm, groove width L at the outle...

Embodiment 2

[0054] At the same time, change the shape of the nozzle flow channel 1 and the shape of the flow channel before the nozzle intake. For details, see the attached image 3 , 4 , 5, the number of nozzle runners is 3, and the slot width at the inlet of runner 2 before air intake is L 0 ' is 7.2mm, and the nozzle 6 and the cold end pipe 4 are connected by threads. The assembly of the nozzle and other parts of the vortex tube is as attached Figure 10 shown. Other dimensions of the nozzle: the same as in Embodiment 1.

[0055] Effect:

[0056] When the inlet pressure is 0.4MPa (absolute pressure), the inlet temperature is 24°C, the length of the hot end pipe is 140mm, and the number of nozzle flow channels is 3. The nozzle vortex tube of the present invention has a cold flow rate of 56.2%, reaching the lowest cold end temperature of -5.5°C; and under the same test conditions, using a common rectangular nozzle, the vortex tube reaches the lowest cold end temperature when the co...

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PUM

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Abstract

The invention is the vortex tube nozzle and belongs to the refrigeration field. The characteristics are: the flow channel (1) of the nozzle adopts the geometrical symmetry, which is that the central axis line of the flow channel is designed by the equal Mach grads and makes the air flow increase along the axis line to reduce the lost of the air flow; the air intake front channel (2) of the nozzle adopts the design of the same plane with the nozzle channel (1) and the equal air speed, which is to ensure the speed of the normal face of the central line of the air channel consistent to the intake of the vortex tube. The invention improves the refrigeration temperature effect of the vortex tube and increases the chill flow ratio of the maximum refrigeration to improve the unit refrigeration volume and the refrigeration coefficient.

Description

technical field [0001] The invention belongs to the refrigeration field, and in particular relates to a vortex tube nozzle. Background technique [0002] The vortex tube is a separation device that converts pressure energy into velocity energy, and then divides the intake air flow into two streams of cold and hot air with different total temperatures through vortex transformation. It consists of a pipe with two ends open, nozzles, vortex Chamber, the hot end tube and the cold end outlet located on both sides of the vortex chamber, the hot end valve located at the end of the hot end tube, the hot end outlet, and the cold end orifice plate between the cold end outlet and the vortex chamber. Among them, the nozzle is the key component that converts pressure energy into velocity energy in the vortex tube. The higher the velocity at the outlet of the nozzle, the lower the thermodynamic temperature at the outlet, so the cooling performance of the vortex tube is better. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/04
CPCF25B9/04
Inventor 马重芳吴玉庭何曙葛满初
Owner BEIJING UNIV OF TECH
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