US 11,879,556 B2 · Check valve unit and air-conditioning apparatus, and method for manufacturing check valve unit

Abstract

A check valve unit 1 includes: a container body 2 including a valve body housing portion 21, a valve seat 22, and a protruding portion 23, the valve body housing portion 21 having a cylindrical shape, the valve seat 22 being formed at one end portion of the valve body housing portion 21 and protruding from an inner peripheral surface of the valve body housing portion 21, the protruding portion 23 being formed at the other end portion of the valve body housing portion 21 and protruding from the inner peripheral surface of the valve body housing portion 21; and a valve body 3 including a valve portion 31 and a guide portion 32 and disposed in the container body 2, the valve portion 31 coming into contact with the valve seat 22 at a time of preventing backflow of refrigerant, the guide portion 32 including a plurality of blades.

Claims7

Dependent claims

A method for manufacturing a check valve unit, the method comprising:

disposing a tube stock in a state of being clamped by outer dies;
fixing the tube stock by pushing shaft pushing tools into the tube stock from both ends of the tube stock;
filling the tube stock with fluid;
forming a valve seat on an inner peripheral surface of the tube stock by further pushing the shaft pushing tools into the tube stock from both ends of the tube stock;
cutting the tube stock to cause the valve seat to form one end portion;
inserting a valve body into the tube stock;
and
forming a protruding portion that protrudes inward at an other end portion, the other end portion being on a side opposite to the valve seat.

5 more elements

Dependencies are inferred from the claim text.

Check valve unit and air-conditioning apparatus, and method for manufacturing check valve unit

Life of this patent

Check valve unit and air-conditioning apparatus, and method for manufacturing check valve unit

Life of this patent

Abstract

Claims7