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An asymmetric multi-tooth internal thread copper pipe

An internal thread, asymmetric technology, applied in the direction of tubular components, lighting and heating equipment, heat exchange equipment, etc., can solve the problems of low heat exchange rate of refrigerant and increase of refrigerant flow resistance, so as to reduce refrigerant flow resistance and improve The effect of heat exchange rate

Active Publication Date: 2016-10-05
ZHEJIANG NAILE COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the prior art that the thread on the inner wall of the copper tube causes the increase of the flow resistance of the refrigerant and the low heat exchange rate of the refrigerant in different parts of the heat transfer tube, the invention provides a method that can effectively reduce the flow resistance of the refrigerant and strengthen the copper tube body. Internal turbulence, turbulent flow, asymmetrical multi-tooth internal thread copper tube that improves the heat exchange rate inside and outside the copper tube body

Method used

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  • An asymmetric multi-tooth internal thread copper pipe
  • An asymmetric multi-tooth internal thread copper pipe
  • An asymmetric multi-tooth internal thread copper pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: as figure 1 The shown asymmetric multi-tooth type internally threaded copper pipe includes a copper pipe body 1, and the inner wall of the copper pipe body is provided with four sets of spirally distributed tooth ribs along the circumferential direction, respectively tooth ribs A2, tooth ribs B3, Tooth rib a4, tooth rib b5, on any section of the copper pipe body, the arc surfaces of tooth rib A, tooth rib B, tooth rib a, and tooth rib b each occupy a central angle of 90°, of which tooth rib A and tooth rib a The cross-section is a rectangular structure, the cross-sections of rib B and rib b are triangular, the ratio of the tooth width of rib A to the width of rib a is 1:1.5, the tooth tip angle of rib B and the tooth width of rib b The ratio of the top angle is 1:1.5, the tooth top angles of tooth rib B and tooth rib b are rounded, and the angle β between tooth rib A, tooth rib B, tooth rib a, tooth rib b and the axis of the copper pipe body is 30 °, the ...

Embodiment 2

[0026] Embodiment 2: as figure 2The shown asymmetric multi-tooth type internally threaded copper pipe includes a copper pipe body 1, and the inner wall of the copper pipe body is provided with four sets of spirally distributed tooth ribs along the circumferential direction, respectively tooth ribs A2, tooth ribs B3, Tooth rib a4, tooth rib b5, on any cross section of the copper pipe body, the arc surfaces where tooth rib A, tooth rib B, tooth rib a, and tooth rib b respectively occupy 90°central angles, among which tooth rib A, tooth rib a The cross-section is a rectangular structure, the cross-sections of rib B and rib b are triangular, the ratio of the tooth width of rib A to the width of rib a is 1:1.2, the tooth tip angle of rib B and the tooth width of rib b The ratio of the apex angle is 1:2, the tooth top angles of tooth rib B and tooth rib b are rounded, the tooth top of tooth rib a4 is provided with V-shaped grooves 40 distributed along tooth rib a, tooth rib b and t...

Embodiment 3

[0027] Embodiment 3: as Figure 4 The shown asymmetric multi-tooth type internally threaded copper pipe includes a copper pipe body 1, and the inner wall of the copper pipe body is provided with four sets of spirally distributed tooth ribs along the circumferential direction, respectively tooth ribs A2, tooth ribs B3, Tooth rib a4, tooth rib b5, on any cross section of the copper pipe body, the arc surfaces where tooth rib A, tooth rib B, tooth rib a, and tooth rib b respectively occupy 90°central angles, among which tooth rib A, tooth rib a The cross-section is a rectangular structure, the cross-sections of rib B and rib b are triangular, the ratio of the tooth width of rib A to the width of rib a is 1:1.3, the tooth tip angle of rib B and the tooth width of rib b The ratio of the top angle is 1:1.8, the tooth top angles of tooth rib B and tooth rib b are rounded, and the included angle β between tooth rib A, tooth rib B, tooth rib a, tooth rib b and the axis of the copper pi...

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Abstract

The invention relates to the technical field of inner grooved copper tubes and discloses an asymmetric multi-tooth inner grooved copper tube. The inner grooved copper tube comprises a copper tube body, wherein four groups of spirally-distributed tooth ribs are sequentially arranged on the inner wall of the copper tube body along the circumferential direction; the cambered surfaces of tooth ribs A, tooth ribs B, tooth ribs a and tooth ribs b occupy a 90-degree central angle, respectively; the cross sections of the tooth ribs A and the tooth ribs a are rectangular structures; the cross sections of the tooth ribs B and the tooth ribs b are triangular; the ratio of the tooth width of the tooth ribs A to the tooth width of the tooth ribs a is (1 to 1.5) to (1 to 2); the ratio of the tooth top angle of the tooth ribs B to the tooth top angle of the tooth ribs b is (1 to 1.5) to (1 to 2); V-shaped grooves distributed along the tooth ribs a are formed in the tops of the teeth of the tooth ribs a; the ratio of the tooth distance of the tooth ribs b to the tooth distance of the tooth ribs B is (1 to 1.2) to (1 to 1.5); the ratio of the tooth distance of the tooth ribs A to the tooth distance of the tooth ribs a is (1 to 1.3) to (1 to 1.8). Consequently, the asymmetric multi-tooth inner grooved copper tube has the beneficial effects that the refrigerant flow resistance can be effectively reduced, and the heat exchange rate between refrigerants of different parts in the copper tube body is increased.

Description

technical field [0001] The invention relates to the technical field of heat transfer copper pipes, in particular to an asymmetrical multi-tooth internal thread copper pipe. Background technique [0002] The condenser and evaporator in the air conditioner are made of internally threaded copper tube coils. In the field of heat transfer tube technology, the upgrade from light tubes to internally threaded copper tubes is a major technological innovation, which greatly improves the cooling performance of air conditioners. , heating performance, the current internally threaded copper pipes are generally a single spiral groove or helical teeth, and there are also many documents or patents that disclose helical teeth with different cross-sectional shapes, such as M-shaped, Y-shaped, trapezoidal, semicircular Teeth, various tooth shapes are nothing more than to increase the heat transfer surface area, but for internally threaded copper pipes, only changing the cross-sectional shape o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F1/40F25B39/00
Inventor 刘晋龙罗奇梁梁子浩
Owner ZHEJIANG NAILE COPPER