# US 2019/0170443 A1 · Circular Electric Furnace, and Electrode Arrangement Structure Thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170443 A1 - Document ID: US20190170443A1 - Status: Published application - Kind: A1 - Application number: 16/304,650 - Filed: 2017-05-15 - Published: 2019-06-06 - Earliest claimed: 2016-05-30 - Assignees: Beijing Zhongkaihongde Technology Co., Ltd - Applicants: Beijing Zhongkaihongde Technology Co., Ltd. - Inventors: John Tung CHAO; Wenheng MU; Jibin LIU; Cunhu WANG; Lei CHEN; Han WEN - Web page: https://patentgrep.com/patent/US20190170443A1 ## CPC - F27D 11/10: Disposition of electrodes - F27B 3/085: {Arc furnaces} - H05B 7/10: Mountings, supports, terminals or arrangements for feeding or guiding electrodes - H05B 7/144: Power supplies specially adapted for heating by electric discharge; Automatic control of power, e.g. by positioning of electrodes - F27D: DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE - F27B: FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract The present disclosure provides a circular electric furnace, and electrode arrangement structure thereof. The electrode arrangement structure of the circular electric furnace comprises: 2n electrodes (11-16) and n single-phase transformers (40) each including two output ends, wherein the 2n electrodes (11-16) are respectively connected to the output ends of the n single-phase transformers (40), and n is an integer≥2. The electrode arrangement structure of the circular electric furnace of the present disclosure comprises 2n electrodes (11-16) and n single-phase transformers, with n≥2. That is, the structure comprises at least 4 electrodes and 2 single-phase transformers (40), and one single-phase transformer (40) is connected to two electrodes. In this way, the numbers of electrodes and transformers in the circular electric furnace are effectively increased, and the restriction of a conventional circular electric furnace which can only accommodate three electrodes and one transformer is eliminated, thus effectively increasing the electric power of a circular electric furnace. ## Claims ### Claim 1 An electrode arrangement structure of a circular electric furnace, characterized by comprising: 2n electrodes; and n single-phase transformers each including two output ends, the 2n electrodes being respectively connected to the output ends of the n single-phase transformers, wherein n is an integer≥2. ### Claim 2 (depends on 1) The electrode arrangement structure of the circular electric furnace according to claim 1, characterized in that, n is 3. ### Claim 3 (depends on 2) The electrode arrangement structure of the circular electric furnace according to claim 2, characterized in that, six electrodes are arranged in parallel along the circumference of the electric furnace. ### Claim 4 (depends on 3) The electrode arrangement structure of the circular electric furnace according to claim 3, characterized in that, the centers of six electrodes are located on a single circle, which forms an electrode center circle of the six electrodes. ### Claim 5 (depends on 4) The electrode arrangement structure of the circular electric furnace according to claim 4, characterized in that, the center of the electrode center circle coincides with the center of a furnace chamber of the electric furnace. ### Claim 6 (depends on 4) The electrode arrangement structure of the circular electric furnace according to claim 4, characterized in that, the two electrodes connected to the same single-phase transformer are in-phase electrodes, and the two electrodes being in-phase are arranged adjacent to each other. ### Claim at position 7 7-13. (canceled) ### Claim 14 (depends on 5) The electrode arrangement structure of the circular electric furnace according to claim 5, characterized in that, the two electrodes connected to the same single-phase transformer are in-phase electrodes, and the two electrodes being in-phase are arranged adjacent to each other. ### Claim 15 (depends on 6) The electrode arrangement structure of the circular electric furnace according to claim 6, characterized in that, the angles between the lines connecting the centers of two adjacent electrodes being out-of-phase with the center of the electrode center circle are all β. ### Claim 16 (depends on 14) The electrode arrangement structure of the circular electric furnace according to claim 14, characterized in that, the angles between the lines connecting the centers of two adjacent electrodes being out-of-phase with the center of the electrode center circle are all β. ### Claim 17 (depends on 15) The electrode arrangement structure of the circular electric furnace according to claim 15, characterized in that, the angles between the lines connecting the centers of two adjacent electrodes being in-phase with the center of the electrode center circle are all α, α+β=120°. ### Claim 18 (depends on 16) The electrode arrangement structure of the circular electric furnace according to claim 16, characterized in that, the angles between the lines connecting the centers of two adjacent electrodes being in-phase with the center of the electrode center circle are all α, α+β=120°. ### Claim 19 (depends on 17) The electrode arrangement structure of the circular electric furnace according to claim 17, characterized in that, the ratio B/A of the distance B between the centers of two adjacent electrodes being out-of-phase to the distance A between the centers of two adjacent electrodes being in-phase is not smaller than 1. ### Claim 20 (depends on 18) The electrode arrangement structure of the circular electric furnace according to claim 18, characterized in that, the ratio B/A of the distance B between the centers of two adjacent electrodes being out-of-phase to the distance A between the centers of two adjacent electrodes being in-phase is not smaller than 1. ### Claim 21 (depends on 19) The electrode arrangement structure of the circular electric furnace according to claim 19, characterized in that, the ratio B/A of the distance B between the centers of two adjacent electrodes being out-of-phase to the distance A between the centers of two adjacent electrodes being in-phase is greater than or equal to 1.1 and smaller than or equal to 1.3. ### Claim 22 (depends on 20) The electrode arrangement structure of the circular electric furnace according to claim 20, characterized in that, the ratio B/A of the distance B between the centers of two adjacent electrodes being out-of-phase to the distance A between the centers of two adjacent electrodes being in-phase is greater than or equal to 1.1 and smaller than or equal to 1.3. ### Claim 23 (depends on 5) The electrode arrangement structure of the circular electric furnace according to claim 5, characterized in that, the ratio d/D of the diameter d of the electrode center circle to the inner diameter D of the furnace chamber is not greater than 0.5. ### Claim 24 (depends on 23) The electrode arrangement structure of the circular electric furnace according to claim 23, characterized in that, the ratio d/D of the diameter d of the electrode center circle to the inner diameter D of the furnace chamber is greater than or equal to 0.25 and smaller than or equal to 0.33. ### Claim 25 (depends on 1) A circular electric furnace, characterized by comprising the electrode arrangement structure of the circular electric furnace according to claim 1. ### Claim 26 (depends on 2) A circular electric furnace, characterized by comprising the electrode arrangement structure of the circular electric furnace according to claim 2.