Abstract: A thermal expansion valve comprises a valve body and a valve core member. The valve body is provided with a first connecting chamber, a lower cavity with a transmission member built in, and a first sealing member for separating the first connecting chamber and the lower cavity. A fifth pressure-bearing surface and a sixth pressure-bearing surface, pressed by a cold medium in the first connecting chamber in opposite directions, are disposed on a side wall of the valve core member. The first sealing member comprises a first flexible sealing element, disposed between the transmission member and an upper end portion of the valve core member and having a first edge portion connected to the valve body in a sealing manner.

Abstract: A thermostatic expansion valve and a refrigerating system comprising the thermostatic expansion valve. The thermostatic expansion valve comprises a valve body arranged with an air box on the top, and the inner chamber of the air box is divided into an upper chamber and a lower chamber by a diaphragm. Within the inner chamber of the valve body there are provided a valve plug component and a valve port matched with the valve plug component. The inner chamber of the valve body is divided into a first interface chamber and a second interface chamber by a sealing line or sealing face between the valve port and the valve plug component. At the lower end part of the valve body there is provided a balance chamber to balance the valve plug component. The upper end part of the valve plug component is arranged within the lower chamber and the lower end part thereof is arranged within the balance chamber (14) of the valve body.

Abstract: An expansion valve is disclosed herein and includes a valve body having a chamber; a valve seat and a valve core are provided in the chamber; a first opening and a second opening in communication with the chamber, wherein the valve core moves relative to the valve seat to control a size of a flow channel between the first opening and the second opening, wherein the valve core includes a valve core head portion facing the valve seat, the valve head portion is provided with an axial through hole, a piston is provided in the axial through hole, the piston is connected with the valve body. The piston which is connected with the valve body is provided in the axial through hole of the valve core head portion of the expansion valve.

Abstract: A method of treating a surface for an electronic or optoelectronic component to be bonded with adhesive, and a substrate comprising a ceramic surface for an electronic or optoelectronic component. A coating is applied to the surface that causes a reduction in the surface energy of the surface.