Air conditioner

Patent metadata

Field	Value
Publication number	US-10648716-B2
Application number	US-201715710539-A
Country	US
Kind code	B2
Filing date	Sep 20, 2017
Priority date	Oct 20, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

An air conditioner includes a stainless steel pipe having one end connected to a compressor and the other end connected to a refrigeration cycle component to form a single pipe between the compressor and the refrigeration cycle component, the stainless steel pipe partially having a corrugated part to attenuate vibration transferred from the compressor to the refrigeration cycle component, wherein the corrugated part is integrally formed with the other portion of the stainless steel pipe as at least a portion of the stainless steel pipe is processed.

First claim

The invention claimed is:

1. A refrigeration circuit comprising:
a compressor to compress a refrigerant;
a refrigeration cycle component disposed at and communicably coupled to at least one of an upstream side and a downstream side of the compressor, the refrigeration cycle component comprising a heat exchanger and a valve; and
a stainless steel pipe having a first end thereof coupled to the compressor and a second end thereof coupled to one of the heat exchanger and the valve, the stainless steel pipe forming a single pipe between the compressor and the one of the heat exchanger and the valve, the stainless steel pipe having a corrugated part to attenuate vibration transferred from the compressor to the one of the heat exchanger and the valve,
wherein at least a portion of the stainless steel pipe comprises the corrugated part, the corrugated part of the stainless steel pipe being integrally formed with a remaining portion of the stainless steel pipe,
wherein the stainless steel is composed of, percent by weight, C: 0.03% or less, Si: exceeding 0 to 1.7% or less, Mn: 1.5 to 3.5%, Cr: 15.0 to 18.0%, Ni: 7.0 to 9.0%, Cu: 1.0 to 4.0%, Mo: 0.03% or less, P: 0.04% or less, S: 0.04% or less, N: 0.03% or less, and a balance: residue: Fe, and incidental impurities, and
wherein the stainless steel has an austenite matrix structure and an average diameter of 30 to 60 μm.

2. The refrigeration circuit of claim 1 , wherein the corrugated part is thinner than a region of the stainless steel pipe in which the corrugated part does not exist, the corrugated part having a thickness that is less than or equal to 5% of the thickness of the region of the stainless steel pipe in which the corrugated part does not exist.

3. The refrigeration circuit of claim 1 , wherein the corrugated comprises a plurality ridges and valleys that are alternately disposed,
wherein a thickness (T 1 ) of the stainless steel pipe at each of the plurality of ridges, a thickness (T 2 ) of the stainless steel pipe at each of the plurality of valleys, and a thickness (T 3 ) of the stainless steel pipe between each of the alternatively disposed plurality of ridges and valleys have differences of exceeding 0 to 2% or less.

4. The refrigeration circuit of claim 1 , wherein the corrugated part comprises a plurality of ridges and valleys that are alternately disposed,
wherein the plurality of ridges comprise 2 to 5 ridges that each have a length of 1 cm in a length direction of the stainless steel pipe.

5. The refrigeration circuit of claim 1 , wherein the corrugated part comprises a plurality of ridges and valleys that are alternately disposed,
wherein a distance D between two adjacent ridges is 8 mm or less.

6. The refrigeration circuit of claim 1 , wherein the stainless steel pipe includes a bent region at which at least a partial region of the stainless steel pipe is bent,
wherein the bent region comprises at least a portion of the corrugated part.

7. The refrigeration circuit of claim 1 , wherein the stainless steel pipe comprises:
a linear region; and
a bent region at which at least a partial region of the stainless steel pipe is bent,
wherein the linear region and the bent region each comprises at least a portion of the corrugated part.

8. The refrigeration circuit of claim 1 , wherein the corrugated part comprises a plurality of ridges and valleys that are alternately disposed,
wherein the plurality of ridges are spaced apart from each other, and the plurality of valleys are spaced apart from each other.

9. The refrigeration circuit of claim 1 , wherein the corrugated part comprises a plurality of ridges and valleys that are alternately disposed,
wherein each of the ridges protrudes in a direction perpendicular to an outer circumferential surface of the stainless steel pipe.

10. The refrigeration circuit of claim 1 , wherein the corrugated part comprises a plurality of ridges and valleys that are alternately disposed,
wherein a distance difference between an external diameter at each of the ridges and an external diameter at each of the valleys is 2.8 to 3.2 mm.

11. The refrigeration circuit of claim 1 , wherein the corrugated part comprises a plurality of ridges and valleys that are alternately disposed,
wherein an external diameter (O 2 ) at each of the valleys has a difference of exceeding 0 to 2% or less than an external diameter (O 1 ) at a region in which the corrugated part does not exist,
wherein an internal diameter (I″) at each of the valleys has a difference of exceeding 0 to 2% or less than an inner diameter (I 1 ) at the region in which the corrugated part does not exist.

12. The refrigeration circuit of claim 1 , wherein the stainless steel pipe has a copper junction part ( 430 f , 430 g ) at at least one end portion thereof,
wherein the copper junction part is made of a copper material having a shape of a linear pipe, and is coupled to an outer circumferential surface or an inner circumferential surface of the end portion.

13. The refrigeration circuit of claim 1 , wherein an American Society for Testing and Materials (ASTM) grain size number of the stainless steel is 5.0 to 7.0.

14. The refrigeration circuit of claim 1 , wherein the stainless steel has an austenite matrix structure of 99% or greater based on a grain size area thereof.

15. The refrigeration circuit of claim 14 , wherein the stainless steel has a δ-ferrite matrix structure of 1% or less based on the grain size area thereof.

16. A refrigeration circuit comprising:
a compressor to compress a refrigerant; and
a stainless steel pipe that is coupled to the compressor, the stainless steel pipe having a corrugated part,
wherein the stainless steel pipe comprises an austenite matrix structure having an average diameter of 30 to 60 μm, and
wherein the stainless steel has an austenite matrix structure of 99% or more based on a grain size area thereof, and has a δ-ferrite matrix structure of 1% or less based on the grain size area thereof.

17. The refrigeration circuit of claim 16 , wherein the corrugated part is integrated with the stainless steel pipe.

18. The refrigeration circuit of claim 16 , wherein the corrugated part comprises a plurality of ridges and valleys that are alternately disposed.

Assignees

• Lg Electronics Inc

Inventors

• Hong Seokpyo

Classifications

• F25B2500/06

  Damage · CPC title

• C22C38/58

  with more than 1.5% by weight of manganese · CPC title

• C22C38/42

  with copper · CPC title

• F25B1/08

  using vapour under pressure · CPC title

• F24F5/001 Primary

  Compression cycle type · CPC title