US 10,295,064 B2 · Electronic expansion valve

Abstract

An electronic expansion valve includes an electromagnetic coil, a valve body provided with a valve port, and a valve needle. The valve needle includes a main body section and a first conical surface portion arranged adjacent to the main body section. The valve port includes a straight section portion having equal diameters. When the electromagnetic coil applies a zero pulse, the straight section portion is not in contact with the valve needle, and an intersecting surface of a plane, where a top end of the straight section portion is located, and the valve needle is on the first conical surface portion. With the electronic expansion valve, flow can be precisely adjusted at a low-pulse stage, and during assembly, a position of the 0 pulse can be directly obtained by adjusting relative positions of the valve needle and the valve port and by using a flow meter.

Claims19

Dependent claims

An electronic expansion valve, comprising:

an electromagnetic coil configured to apply a pulse to allow the electronic expansion valve to operate in response to the pulse;
a valve body provided with a valve port;
and
a valve needle configured to cooperate with the valve port to adjust a flow of the electronic expansion valve;
wherein the valve needle comprises a main body section and a first conical surface portion which is arranged adjacent to the main body section,
wherein the valve port comprises a straight section portion having equal diameters;
and
wherein when the electromagnetic coil applies a zero pulse for a zero pulse position of the valve needle, the flow is the smallest but is greater than zero, the straight section portion is not in contact with the valve needle, and an intersecting surface of a second plane and the valve needle are on the first conical surface portion, and, a top end of the straight section portion is located on the second plane.

5 more elements

An electronic expansion valve, comprising:

an electromagnetic coil configured to apply a pulse to allow the electronic expansion valve to operate in response to the pulse;
a valve body provided with a valve port;
and
a valve needle configured to cooperate with the valve port to adjust a flow of the electronic expansion valve;
wherein the valve needle comprises a main body section, a first valve needle conical surface and a second valve needle conical surface, which are adjacently arranged in sequence,
wherein the first valve needle conical surface has a taper angle larger than a taper angle of the second valve needle conical surface,
wherein the valve port comprises a straight section portion having equal diameters, and
wherein when the electromagnetic coil applies a zero pulse for a zero pulse position of the valve needle, a flow is the smallest but is greater than zero, the straight section portion is not in contact with the valve needle, and an intersecting surface of a second plane and the valve needle is on the second valve needle conical surface, and a top end of the straight section portion is located on the second plane.

5 more elements

Dependencies are inferred from the claim text.

Electronic expansion valve

Life of this patent

Electronic expansion valve

Life of this patent

Abstract

Claims19