Branch pipe end jet flow structure, distributor branch pipe and distributor

Abstract

The utility model provides a kind of branch pipe end jet structure, distributor branch pipe and distributor.The branch pipe end jet structure is formed in the downstream end of the branch pipe of distributor and includes the transmission pipe section, jet portion and assembly pipe section being arranged in the downstream of branch pipe body.The jet portion is arranged in the vicinity of the downstream end of transmission pipe section or downstream side to accelerate refrigerant, and jet portion forms jet throat at minimum inside diameter, the inside diameter of jet throat is less than the inside diameter at the downstream end of transmission pipe section, and the inside diameter difference Δd of jet throat and the downstream end of transmission pipe section satisfies:0.03mm≤Δd≤1.65mm, and the axial length L1 of jet portion is ≤350mm.The upstream end of assembly pipe section is connected to transmission pipe section or jet portion, and the outside diameter of downstream end of assembly pipe section is greater than the outside diameter of transmission pipe section to match external pipeline welding.

Claims

1. A jet structure at the end of a branch pipe, characterized in that, The jet structure at the end of the branch pipe, formed at the downstream end of the distributor, includes: The transmission pipe section is located downstream of the branch pipe body; A jet section is provided near or on the downstream side of the transmission pipe section to accelerate the refrigerant. A jet throat is formed at the minimum inner diameter of the jet section. The inner diameter of the jet throat is smaller than the inner diameter at the downstream end of the transmission pipe section, and the difference Δd between the inner diameter of the jet throat and the inner diameter at the downstream end of the transmission pipe section satisfies: 0.03mm≤Δd≤1.65mm. The axial length L1 of the jet section is ≤350mm. An assembly pipe section is connected upstream to a transmission pipe section or a jet section, and the outer diameter of the downstream end of the assembly pipe section is larger than the outer diameter of the transmission pipe section to match the welding of external pipelines.

2. The branch pipe end jet structure according to claim 1, characterized in that, The axial length L2 of the assembled pipe section is less than or equal to 35 mm. The axial length of the assembled pipe section refers to the total axial length from its upstream end face to its downstream end face.

3. The branch pipe end jet structure according to claim 1, characterized in that, The assembly pipe section is integrally formed at the downstream end of the transmission pipe section, and the jet section is embedded and welded to the downstream end of the transmission pipe section or inside the assembly pipe section.

4. The branch pipe end jet structure according to claim 3, characterized in that, The jet section is a jet pipe embedded in the assembly pipe section and welded to the downstream end of the transmission pipe section; Alternatively, the jet section is a jet orifice plate, which is embedded and welded to the downstream end of the transmission pipe section or inside the assembly pipe section. Jet holes are formed on the jet orifice plate, and a jet throat is formed at the minimum inner diameter of the jet holes.

5. The branch pipe end jet structure according to claim 1, characterized in that, The assembly pipe section is welded to the downstream end of the transmission pipe section, and the jet section is located at the downstream end of the transmission pipe section or embedded in the assembly pipe section.

6. The branch pipe end jet structure according to claim 5, characterized in that, The jetting section is a jetting nozzle integrally formed or welded to the downstream end of the transmission pipe section. The jetting nozzle extends into the assembly pipe section and its downstream end forms a jetting throat.

7. The branch pipe end jet structure according to claim 5, characterized in that, The jetting section is embedded near the downstream end of the transmission pipe section or embedded in the assembly pipe section. The jetting section is a jetting pipe or a jetting orifice plate. A jetting hole is formed on the jetting orifice plate, and a jetting throat is formed at the minimum inner diameter of the jetting hole.

8. The branch pipe end jet structure according to claim 4 or 7, characterized in that, The jet hole is a flanged hole that extends from the hole wall toward the downstream end of the assembly pipe section, and a jet throat is formed at the downstream end of the flanged hole.

9. The branch pipe end jet structure according to claim 4 or 7, characterized in that, The jet hole is a through hole formed based on the axial thickness of the jet hole plate, and the jet hole is a constant diameter hole with a basically unchanged diameter; Alternatively, the jet orifice includes a jet throat and a guide orifice section, wherein the guide orifice section is located upstream of the jet throat and its orifice diameter is larger than that of the jet throat; Alternatively, the jet orifice is a Venturi orifice, which includes a guide orifice section, a jet throat, and a diffuser orifice section distributed sequentially along the refrigerant flow direction, wherein the orifice diameters of the guide orifice section and the diffuser orifice section are both larger than the orifice diameter at the jet throat.

10. The branch pipe end jet structure according to claim 1, characterized in that, The jet section is a jet pipe, with its upstream end connected to the transmission pipe section and its downstream end connected to the assembly pipe section.

11. The branch pipe end jet structure according to claim 1, characterized in that, The transmission pipe section, the jet section, and the assembly pipe section are distributed sequentially along the refrigerant transmission direction and are integrally formed.

12. The branch pipe end jet structure according to claim 1, characterized in that, The branch pipe end jet structure also includes an outer liner welded to the assembly pipe section, the outer liner being configured to increase the outer diameter of the assembly pipe section to match the welding of external pipelines.

13. A branch pipe end jet structure, characterized in that, The jet structure at the end of the branch pipe, formed at the downstream end of the distributor, includes: The transmission pipe section is located downstream of the main branch pipe; The assembly pipe section is located downstream of the transmission pipe section to match the welding of external pipelines; The jetting section is located downstream of the assembly pipe section or embedded within the assembly pipe section. The jetting throat is formed at the minimum inner diameter of the jetting section. The inner diameter of the jetting throat is smaller than the inner diameter at the downstream end of the transmission pipe section and the inner diameter of the assembly part on the assembly pipe section, respectively. The difference Δd between the inner diameter of the jetting throat and the inner diameter at the downstream end of the transmission pipe section satisfies: 0.03mm≤Δd≤1.65mm. The axial length L1 of the jetting section is ≤350mm.

14. The branch pipe end jet structure according to claim 13, characterized in that, The transmission pipe section, assembly pipe section, and jet section are arranged sequentially along the refrigerant transmission direction and are integrally formed.

15. A distributor branch pipe, characterized in that, include: Branch pipe body; The branch pipe end jet structure according to any one of claims 1 or 13.

16. A dispenser, characterized in that, include: The distributor body has multiple branch pipe holes at its liquid outlet end; At least one distributor branch pipe as described in claim 15 is welded to the branch pipe hole.

Images