# US 11,906,055 B2 · Electronic expansion valve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,055 B2 - Document ID: US11906055B2 - Status: Granted - Kind: B2 - Application number: 17/604,070 - Filed: 2020-06-28 - Published: 2022-04-07 - Granted: 2024-02-20 - Earliest claimed: 2019-06-28 - Assignees: Zhejiang Sanhua Intelligent Controls Co., Ltd. - Applicants: Zhejiang Sanhua Intelligent Controls Co., Ltd - Inventors: Xianrang Wei - Web page: https://patentgrep.com/patent/US11906055B2 ## CPC - F16K 1/487: {by a fixing element extending in the axial direction of the spindle, e.g. a screw} - F16K 1/32: Details (details of more general applicability F16K25/00 - F16K51/00) - F16K 1/34: Cutting-off parts, e.g. valve members, seats (F16K1/06, F16K1/12, F16K1/14, F16K1/26 take precedence) - F16K 1/42: Valve seats (for double-seat valves F16K1/44) - F16K 31/0655: {Lift valves} - F16K 31/50: with screw-spindle {or internally threaded actuating means} - F25B 41/35: by rotary motors, e.g. by stepping motors - Y02B 30/70: Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract An electronic expansion valve includes the valve needle screw assembly which also includes an outer edge guide section, the electronic expansion valve includes an inner edge guide section matched with the outer edge guide section, in the process of the action of the valve needle of the electronic expansion valve, the outer edge guide section of the valve needle screw assembly is matched with the inner edge guide section of the electronic expansion valve, to provide the guide for the valve needle, relatively reducing the deviation of the valve needle relative to the valve port, thereby reducing the eccentric wear of the valve needle. ## Claims ### Claim 1 An electronic expansion valve, comprising a valve needle screw rod assembly, wherein the valve needle screw rod assembly comprises a valve needle, a valve needle sleeve, a spring washer portion, a spring and a screw rod assembly; the valve needle is fixedly connected to the valve needle sleeve, the valve needle sleeve comprises a peripheral wall portion and a matching portion, an inner diameter of the matching portion is smaller than an inner diameter of the peripheral wall portion; the screw rod assembly comprises a screw rod, a lower stop portion, a upper stop portion and a valve needle support portion, wherein the lower stop portion is between the upper stop portion and the valve needle support portion, the screw rod is connected with the lower stop portion, the upper stop portion and the valve needle support portion, the valve needle support portion is abuttable against the matching portion of the valve needle sleeve; wherein the lower stop portion is able to abut against the spring washer portion, the spring is mounted around the screw rod, one end of the spring abuts against the upper stop portion, and another end of the spring abuts against the spring washer portion; the valve needle screw rod assembly further comprises an outer edge guide section, the electronic expansion valve comprises an inner edge guide section that cooperates with the outer edge guide section. ### Claim 2 (depends on 1) The electronic expansion valve according to claim 1, wherein the valve needle comprises a valve needle upper guide section, the outer edge guide section comprises at least part of the valve needle upper guide section and/or at least part of an outer wall of the peripheral wall portion of the valve needle sleeve. ### Claim 3 (depends on 2) The electronic expansion valve according to claim 2, further comprising a valve seat assembly, wherein the valve seat assembly comprises a valve seat, a first connecting pipe portion, a second connecting pipe portion and a guide seat, the guide seat is fixedly connected with the valve seat, the guide seat defines the inner edge guide section, the first connecting pipe portion and the second connecting pipe portion are fixedly connected to the valve seat. ### Claim 4 (depends on 3) The electronic expansion valve according to claim 3, wherein the valve needle further comprises a valve needle lower guide section, the guide seat comprises a small inner edge guide section that cooperates with the valve needle lower guide section. ### Claim 5 (depends on 3) The electronic expansion valve according to claim 3, further comprising a nut assembly, wherein the nut assembly comprises a nut and a nut connecting portion, the nut is fixedly connected to the nut connecting portion, the nut further comprises a nut guide section, an inner wall of the nut guide section cooperates with an outer wall of the guide seat; the nut connecting portion is fixedly connected to the valve seat; or, the valve seat assembly further comprises a connecting seat, the connecting seat is fixedly connected to the valve seat, the nut connecting portion is fixedly connected to the connecting seat. ### Claim 6 (depends on 2) The electronic expansion valve according to claim 2, further comprising a valve seat assembly, wherein the valve seat assembly comprises a valve seat, a first connecting pipe portion, a second connecting pipe portion and a connecting seat, the connecting seat is fixedly connected to the valve seat, the first connecting pipe portion and the second connecting pipe portion are fixedly connected to the connecting seat, the inner wall of the valve seat cooperates with the outer wall of the valve needle, the valve seat defines the inner edge guide section. ### Claim 7 (depends on 6) The electronic expansion valve according to claim 6, further comprising a nut assembly, wherein the nut assembly comprises a nut and a nut connecting portion, the nut is fixedly connected to the nut connecting portion, the nut connecting portion is fixedly connected to the connecting seat, the nut further comprises a nut guide section, the inner wall of the nut guide section cooperates with the outer wall of the valve seat. ### Claim 8 (depends on 2) The electronic expansion valve according to claim 2, further comprising a valve seat, a first connecting pipe portion and a second connecting pipe portion, the first connecting pipe portion and the second connecting pipe portion are fixedly connected to the valve seat, the inner wall of the valve seat cooperates with the outer wall of the valve needle, the valve seat defines the inner edge guide section. ### Claim 9 (depends on 8) The electronic expansion valve according to claim 8, further comprising a nut assembly, wherein the nut assembly comprises a nut and a nut connecting portion (32), the nut is fixedly connected to the nut connecting portion, the nut connecting portion is fixedly connected to the valve seat. ### Claim 10 (depends on 2) The electronic expansion valve according to claim 2, wherein the inner diameter of the outer edge guide section is 0.02-0.15 mm greater than the inner diameter of the inner edge guide section. ### Claim 11 (depends on 1) The electronic expansion valve according to claim 1, wherein the valve needle comprises a stepped portion, the stepped portion is fixedly connected to the valve needle sleeve, the outer edge guide section comprises at least part of the outer wall of the peripheral wall portion. ### Claim 12 (depends on 1) The electronic expansion valve according to claim 1, wherein the valve needle support portion comprises a valve needle support washer or a suspension engagement portion or a sleeve washer, the valve needle support washer or the suspension engagement portion or the sleeve washer is abuttable against the matching portion of the valve needle sleeve.