# US 2021/0277577 A1 · Heating control system of multi-drum washing machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277577 A1 - Document ID: US20210277577A1 - Status: Published application - Kind: A1 - Application number: 16/471,779 - Filed: 2017-12-21 - Published: 2021-09-09 - Earliest claimed: 2016-12-21 - Assignees: Qingdao Haier Drum Washing Machine Co., Ltd. - Applicants: Qingdao Haier Drum Washing Machine Co., Ltd. - Inventors: Wenwei LI; Jun WU; Haibo WANG; Guangfeng WANG; Yubao WANG; Guanghui PAN - Web page: https://patentgrep.com/patent/US20210277577A1 ## CPC - D06F 33/30: Control of washing machines characterised by the purpose or target of the control (controlling processes of washer-dryers D06F33/50) - D06F 31/00: Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies - D06F 39/04: Heating arrangements - D06F 34/10: Power supply arrangements, e.g. stand-by circuits - D06F 34/14: Arrangements for detecting or measuring specific parameters - D06F 2103/16: Washing liquid temperature - D06F 2103/52: related to electric heating means, e.g. temperature or voltage - D06F 2105/28: Electric heating - D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES ## Abstract A multi-drum washing machine comprises at least two sets of heating devices, and at least two detection units which are correspondingly connected with the heating devices. Each detection unit is used for detecting heating information of the corresponding heating device and controlling at least one other heating device to be turned on/off according to the heating information. The heating control system of the multi-drum washing machine solves the problem that it is difficult to detect heating devices in a multi-drum washing machine, thus increasing the calculation burden of a processor. The disclosure realizes real-time detection of the heating devices through simple detection circuit hardware connection on a circuit of each heating device. The circuits are detected by using connection structures of circuit hardware, thereby saving cost, improving the sensitivity of the detection circuits and prolonging the service life of the processor of the multi-drum washing machine. ## Claims ### Claim 1 A heating control system of a multi-drum washing machine having at least two sets of heating devices, comprising, at least two detection units which are correspondingly connected with the heating devices, wherein one of the detection units is used for detecting heating information of one of the heating device, and, at least one other heating device is controlled to be turned on/off according to the heating information. ### Claim 2 (depends on 1) The heating control system of the multi-drum washing machine according to claim 1, wherein a first detection unit, corresponding to a first heating device, in the control system detects heating information of the first heating device, and a second heating device is controlled to be turned on/off according to the heating information of the first heating device; wherein the first heating device and the second heating device are arranged in parallel. ### Claim 3 (depends on 1) The heating control system of the multi-drum washing machine according to claim 1, wherein each heating device comprises at least one heating unit and a control unit corresponding to the heating unit, one end of the heating unit is connected with a first power supply, another end of the heating unit is connected with one end of the control unit, and another end of the control unit is connected with a second power supply; wherein the control unit is used for controlling the heating unit to be turned on/off. ### Claim 4 (depends on 3) The heating control system of the multi-drum washing machine according to claim 3, wherein the detection unit is arranged in parallel with the control unit and is used for detecting electric potential information of at least one end of the control unit. ### Claim 5 (depends on 3) The heating control system of the multi-drum washing machine according to claim 3, wherein the heating unit comprises one or more than one element selected from a group consisting of a heating pipe, a heating wire, a heating rod and an electromagnetic induction heating ring. ### Claim 6 (depends on 3) The heating control system of the multi-drum washing machine according to claim 3, wherein the detection unit is a first detection circuit, and an input end of the first detection circuit is arranged between and connected with the heating unit and the control unit. ### Claim 7 (depends on 6) The heating control system of the multi-drum washing machine according to claim 6, wherein a connecting relation of the first detection circuit is as follows: one end of a first resistor R is connected with the input end, another end of the first resistor R is connected with an output end and a capacitor C, and another end of the capacitor C is grounded. ### Claim 8 (depends on 3) The heating control system of the multi-drum washing machine according to claim 3, wherein the detection unit is a second detection circuit, and the second detection circuit is connected in parallel with the control unit; wherein one end of the second detection circuit is arranged between the heating unit and the control unit, and another end of the second detection circuit is arranged between the control unit and the second power supply and, the second detection circuit and the corresponding control unit form a closed loop. ### Claim 9 (depends on 8) The heating control system of the multi-drum washing machine according to claim 8, wherein a connecting relation of the second detection circuit is as follows: the second detection circuit comprises a second resistor R1 and a diode D, the resistor R1 and the diode D are connected and form a closed loop with the control unit; the second detection circuit further comprises an optical coupler OC, the optical coupler OC is reversely connected with the diode D, a C pole of the optical coupler OC is connected with a third resistor R3 and an external power supply V+, and an E pole of the optical coupler OC is grounded. ### Claim 10 (depends on 3) The heating control system of the multi-drum washing machine according to claim 3, wherein the control unit comprises a knife switch and/or a relay switch. ### Claim 11 (depends on 2) The heating control system of the multi-drum washing machine according to claim 2, wherein each heating device comprises at least one heating unit and a control unit corresponding to the heating unit, one end of the heating unit is connected with a first power supply, another end of the heating unit is connected with one end of the control unit, and another end of the control unit is connected with a second power supply; wherein the control unit is used for controlling the heating unit to be turned on/off. ### Claim 12 (depends on 5) The heating control system of the multi-drum washing machine according to claim 5, wherein the heating unit is a heating pipe. ### Claim 13 (depends on 4) The heating control system of the multi-drum washing machine according to claim 4, wherein the heating unit comprises one or more than one element selected from a group consisting of a heating pipe, a heating wire, a heating rod and an electromagnetic induction heating ring. ### Claim 14 (depends on 4) The heating control system of the multi-drum washing machine according to claim 4, wherein the detection unit is a first detection circuit, and an input end of the first detection circuit is arranged between and connected with the heating unit and the control unit. ### Claim 15 (depends on 5) The heating control system of the multi-drum washing machine according to claim 5, wherein the detection unit is a first detection circuit, and an input end of the first detection circuit is arranged between and connected with the heating unit and the control unit. ### Claim 16 (depends on 4) The heating control system of the multi-drum washing machine according to claim 4, wherein the detection unit is a second detection circuit, and the second detection circuit is connected in parallel with the control unit; wherein one end of the second detection circuit is arranged between the heating unit and the control unit, and another end of the second detection circuit is arranged between the control unit and the second power supply and, the second detection circuit and the corresponding control unit form a closed loop. ### Claim 17 (depends on 5) The heating control system of the multi-drum washing machine according to claim 5, wherein the detection unit is a second detection circuit, and the second detection circuit is connected in parallel with the control unit; wherein one end of the second detection circuit is arranged between the heating unit and the control unit, and another end of the second detection circuit is arranged between the control unit and the second power supply and, the second detection circuit and the corresponding control unit form a closed loop.