Refrigerant flow path unit and refrigeration apparatus

Patent metadata

Field	Value
Publication number	US-11946677-B2
Application number	US-202318476601-A
Country	US
Kind code	B2
Filing date	Sep 28, 2023
Priority date	Mar 31, 2021
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

A refrigerant flow path unit includes: a unit body that includes plates that are laminated together, and has an interior in which a refrigerant flow path is formed; a refrigerant pipe; and a first brazing filler metal that joins the unit body to the refrigerant pipe. The plates of the unit body include: a first plate that has a first opening and is disposed at an end of the unit body in a first direction in which the plates are laminated; and a second plate that has a second opening that communicates with the first opening and is disposed second from the end of the unit body in the first direction. The refrigerant pipe is inserted into the first opening and the second opening.

First claim

What is claimed is:

1. A refrigerant flow path unit comprising:
a unit body that:
comprises plates that are laminated together, and
has an interior in which a refrigerant flow path is formed;

a refrigerant pipe; and
a first brazing filler metal that joins the unit body to the refrigerant pipe, wherein
the plates of the unit body include:
a first plate that has a first opening and is disposed at an end of the unit body in a first direction in which the plates are laminated; and
a second plate that has a second opening that communicates with the first opening and is disposed second from the end of the unit body in the first direction,

the refrigerant pipe is inserted into the first opening and the second opening,
the first brazing filler metal joins an inner peripheral surface of the first opening and an inner peripheral surface of the second opening to an outer peripheral surface of the refrigerant pipe, and
the first plate is thinner than the second plate.

2. The refrigerant flow path unit according to claim 1 , wherein the refrigerant pipe is connected to another refrigerant pipe that is connected to a compressor of an air conditioner.

3. The refrigerant flow path unit according to claim 1 , further comprising a second brazing filler metal that joins the first plate to the second plate.

4. The refrigerant flow path unit according to claim 3 , wherein a melting point of the first brazing filler metal is equal to a melting point of the second brazing filler metal.

5. The refrigerant flow path unit according to claim 1 , wherein the first plate comprises a cylindrical protrusion that:
protrudes in a direction in which the first plate and the second plate are laminated, and
forms the first opening.

6. A refrigeration apparatus comprising the refrigerant flow path unit according to claim 1 .

7. A refrigerant flow path unit comprising:
a unit body that:
comprise plates that are laminated together, and
has an interior in which a refrigerant flow path is formed;

a refrigerant pipe; and
a first brazing filler metal that joins the unit body to the refrigerant pipe, wherein
the plates of the unit body include:
a first plate that has a first opening; and
a second plate that has a second opening that communicates with the first opening and is laminated to the first plate,

the refrigerant pipe is inserted into the first opening and the second opening,
the first brazing filler metal joins an inner peripheral surface of the first opening and an inner peripheral surface of the second opening to an outer peripheral surface of the refrigerant pipe,
the refrigerant pipe comprises:
a first refrigerant pipe; and
a second refrigerant pipe having a diameter smaller than a diameter of the first refrigerant pipe, and

the first refrigerant pipe has a greater joint length to be joined to the first plate and the second plate in a pipe axis direction than that of the second refrigerant pipe.

8. The refrigerant flow path unit according to claim 7 , wherein the refrigerant pipe is connected to another refrigerant pipe that is connected to a compressor of an air conditioner.

9. The refrigerant flow path unit according to claim 7 , further comprising a second brazing filler metal that joins the first plate to the second plate.

10. The refrigerant flow path unit according to claim 9 , wherein a melting point of the first brazing filler metal is equal to a melting point of the second brazing filler metal.

11. The refrigerant flow path unit according to claim 7 , wherein the first plate comprises a cylindrical protrusion that:
protrudes in a direction in which the first plate and the second plate are laminated, and
forms the first opening.

12. A refrigeration apparatus comprising the refrigerant flow path unit according to claim 7 .

Assignees

• Daikin Ind Ltd

Inventors

• Hamadate Junichi
• Koike Fumiaki
• Ono Asahi
• Kubo Ayumi
• Okuno Masato
• Yakura Naritaka

Classifications

• B23K1/20

  Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating · CPC title

• B23K1/19

  taking account of the properties of the materials to be soldered · CPC title

• B23K1/0012

  Brazing of heat exchangers · CPC title

• B23K1/00

  Soldering, e.g. brazing, or unsoldering (B23K3/00 takes precedence) · CPC title

• F25B41/40 Primary

  Fluid line arrangements · CPC title