Electronic expansion valve
AssigneeZhejiang Sanhua Co., Ltd.
InventorMing LV
Life of this patent
Estimating the term…
Abstract
An electronic expansion valve is provided, a valve rod of which is provided with an axial through-hole in communication with a valve port, and a lateral wall of the axial through-hole of the valve seat is sealed with respect to the valve rod. An end surface of the valve rod includes a sealing surface in sealing contact with an end surface at the valve port, the sealing surface includes a first sealing surface to bear an action force of refrigerant at one connecting port and a second sealing surface to bear an action force of refrigerant at another connecting port, and the effective pressure-bearing area of the first sealing surface is equal to that of the second sealing surface. Further provided is an electronic expansion valve in line contact seal with the valve seat.
Claims20
An electronic expansion valve, wherein a valve rod is provided inside a valve cavity of the electronic expansion valve, the valve rod is axially movable along an axial through-hole of a valve seat of the electronic expansion valve, to open or close a valve port arranged in the valve seat in order to allow or prevent the communication between two connecting ports of the electronic expansion valve, wherein the valve rod is provided with an axial through-hole in communication with the valve port, a lateral wall of the axial through-hole of the valve seat is sealed with respect to the valve rod, an end surface of the valve rod comprises a sealing surface able to be in contact seal with an end surface at the valve port, the sealing surface comprises a first sealing surface configured to bear an acting force of a refrigerant at one connecting port, and a second sealing surface configured to bear an acting force of a refrigerant at another connecting port;
- and the first sealing surface has an effective pressure-bearing area equal to an effective pressure-bearing area of the second sealing surface.
An electronic expansion valve, a valve cavity of which being provided with a valve rod, the valve rod is axially movable along an axial through-hole of a valve seat of the electronic expansion valve to open or close a valve port arranged in a valve seat, so as to allow or prevent the communication between two connecting ports of the electronic expansion valve, wherein the valve rod is provided with an axial through-hole in communication with the valve port;
- the valve rod is in a line contact with the valve seat when the valve rod closes the valve port;
- and
- a refrigerant at one of the two connecting ports applies a pressure on an upper surface and a lower surface of the valve rod respectively, and an effective pressure-bearing area of the upper surface is equal to an effective pressure-bearing area of the lower surface;
- a refrigerant at another connecting port of the two connecting ports applies a pressure on an upper surface and a lower surface of the valve rod respectively, and an effective pressure-bearing area of the upper surface is equal to an effective pressure-bearing area of the lower surface.
Dependencies are inferred from the claim text.