# US 12,635,707 B2 · System and method for automatically cleaning and washing ice cream or yogurt machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,635,707 B2 - Document ID: US12635707B2 - Status: Granted - Kind: B2 - Application number: 18/413,004 - Filed: 2024-01-15 - Published: 2024-08-15 - Granted: 2026-05-26 - Earliest claimed: 2021-05-10 - Applicants: Lingyu Dong - Inventors: Lingyu Dong - Web page: https://patentgrep.com/patent/US12635707B2 ## CPC - A23G 9/30: Cleaning; Keeping clean; Sterilisation - A23G 7/00: Other apparatus {or process} specially adapted for the chocolate or confectionery industry - A23G: COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF ## Abstract A system for automatically cleaning and washing an ice cream machines includes a liquid container for storing raw materials; a freezing cylinder connected with the liquid container through a cleaning pathway; a water tank for storing rinse water to rinse the freezing cylinder and the cleaning pathway; a detergent tank for storing detergents to clean and wash the freezing cylinder and the cleaning pathway; a pump arranged on the cleaning pathway to selectively pump the raw material, the rinse water or the detergent; and a control panel adapted to control an on/off and cleaning. ## Claims ### Claim 1 A cleaning and washing system for automatically cleaning and washing a pipeline and a freezing cylinder of an ice cream or yogurt machine, comprising: a thermal exchange arrangement; a rinse containing device arranged to store at least one rinse water and at least one detergent; and a control module adapted to control an on/off and a cleaning operation that, the at least one rinse water and the at least one detergent for selectively feeding into the pipeline and the freezing cylinder to clean and wash the freezing cylinder and the pipeline, wherein the thermal exchange arrangement is connected to the freezing cylinder and operated as a heating unit to melt and drain one or more residues in the pipeline and the freezing cylinder, wherein firstly, the at least one rinse water is passing through the pipeline and the freezing cylinder while operating the thermal exchange arrangement to heat the at least one rinse water feeding through the pipeline and the freezing cylinder to melt and absorb the one or more residues in the pipeline and the freezing cylinder and drain the one or more residues absorbed by the rinse water from the pipeline and the freezing cylinder, and secondly, the at least one rinse water and the at least one detergent are passing through the pipeline and the freezing cylinder to clean and wash the pipeline and the freezing cylinder while the thermal exchange arrangement is operated to heat the at least one rinse water feeding through the freezing cylinder, and finally, the at least one rinse water is fed through the pipeline and the freezing cylinder in order to remove and drain out any remaining detergent residue in the pipeline and the freezing cylinder. ### Claim 2 (depends on 1) The cleaning and washing system, as recited in claim 1, wherein when the thermal exchange arrangement is operated as the heating unit and controlled by the control module, the one or more residues frozen in in the pipeline and the freezing cylinder is heated up and melted and then drained out through the dispensing device. ### Claim 3 (depends on 2) The cleaning and washing system, as recited in claim 2, wherein the at least one detergent and the at least one rinse water fed into the freezing cylinder are also heated up by the heating unit. ### Claim 4 (depends on 3) The cleaning and washing system, as recited in claim 3, wherein the heating unit is the thermal exchange arrangement which is controlled by the control module and switched from refrigeration function to heating function to heat up the detergent and the rinse water during the cleaning operation activated by the control module. ### Claim 5 (depends on 4) The cleaning and washing system, as recited in claim 4, wherein the rinse containing device includes a tank for storing at least one of the at least one rinse water and the at least one detergent for cleaning and washing the pipeline and the freezing cylinder. ### Claim 6 (depends on 3) The cleaning and washing system, as recited in claim 3, wherein the rinse containing device includes a tank for storing at least one of the at least one rinse water and the at least one detergent for cleaning and washing the pipeline and the freezing cylinder. ### Claim 7 (depends on 2) The cleaning and washing system, as recited in claim 2, wherein the heating unit is the thermal exchange arrangement which is controlled by the control module and switched from refrigeration function to heating function to heat up the residues of the ice cream or yogurt during the cleaning operation activated by the control module. ### Claim 8 (depends on 1) The cleaning and washing system, as recited in claim 1, wherein the heating unit is the thermal exchange arrangement which is controlled by the control module and switched from refrigeration function to heating function to heat up the residues of the ice cream or yogurt during the cleaning operation activated by the control module. ### Claim 9 (depends on 8) The cleaning and washing system, as recited in claim 8, wherein the rinse containing device includes a tank for storing at least one of the at least one rinse water and the at least one detergent for cleaning and washing the pipeline and the freezing cylinder. ### Claim 10 (depends on 1) The cleaning and washing system, as recited in claim 1, wherein the rinse containing device includes a tank for storing at least one of the at least one rinse water and the at least one detergent for cleaning and washing the pipeline and the freezing cylinder. ### Claim 11 A method of cleaning and washing a pipeline and a freezing cylinder of an ice cream or yogurt machine, comprising steps of: (a) turning off a normal operation of the freezing cylinder to stop feeding raw materials from a liquid container to the freezing cylinder and to stop a thermal exchange device to function for refrigeration, and activating a cleaning operation module to turn on a cleaning operation automatically; (b) activating the thermal exchange device to function as a heating unit to produce heat, heating the freezing cylinder through the thermal exchange device to warm up and melt a residue of the ice cream or yogurt inside the freezing cylinder, and draining out the residue of the ice cream or yogurt inside the freezing cylinder via a dispensing pipeline of the pipeline and a dispensing device; (c) feeding a water from a water tank by a pump into a feeding channel of the freezing cylinder through a feeding pipeline of the pipeline to absorb the residue of the ice cream or yogurt in the pipeline and the freezing cylinder, and draining the residue of the ice cream or yogurt absorbed by the water from the pipeline and the feeding channel of the freezing cylinder through the dispensing pipeline of the pipeline and the dispensing device, while the thermal exchange device continuously being operated as the heating unit to heat the water feeding through the feeding channel of the freezing cylinder; (d) passing the water from the water tank and one or more detergents contained in a detergent tank by the pump through the feeding pipeline of the pipeline for being fed into and through the feeding channel of the freezing cylinder and dispensed through the dispensing pipeline of the pipeline so as to clean and wash the pipeline and the freezing cylinder, while the thermal exchange device being operated as the heating unit to heat the water feeding through the feeding channel of the freezing cylinder; (e) feeding the water from the water tank only by the pump through the pipeline and freezing cylinder to clean and drain out one or more residues of the one or more detergents in the feeding pipeline and dispensing pipeline of the pipeline and the feeding channel of the freezing cylinder by the water to prevent the one or more detergents remained inside the pipeline and the freezing cylinder; and (f) turning off the cleaning operation and turning on the normal operation of the freezing cylinder. ### Claim 12 (depends on 11) The method, as recited in claim 11, wherein in the step (b), during the cleaning operating of the pipeline and the freezing cylinder, the thermal exchange device is activated to function in a reverse way as the heating unit to produce heat and the inlet of the freezing cylinder is switched to connect a refrigerant duct which has one end connected to the thermal exchange device to collect a heating refrigerant and another end connected to the inlet of the freezing cylinder, such that the heating refrigerant is fed into the exchange channel of the freezing cylinder to heat up the residue of the ice cream or yogurt in the feeding channel of the freezing cylinder. ### Claim 13 (depends on 12) The method, as recited in claim 12, wherein the cleaning operation is turned on and turned off by the cleaning operation module according to predetermined times. ### Claim 14 (depends on 12) The method, as recited in claim 12, wherein the cleaning operation is turned on and turned off by the cleaning operation module according to a predetermined number of usage loads of the raw materials pumped to the freezing cylinder. ### Claim 15 (depends on 14) The method, as recited in claim 14, wherein a sensor is connected to the freezing cylinder for detecting the usage loads of the liquid containers. ### Claim 16 (depends on 15) The method, as recited in claim 15, wherein the step (d) further comprises a step of heating the water and the one or more detergents passing through the feeding channel of the freezing cylinder by the heating unit. ### Claim 17 (depends on 11) The method, as recited in claim 11, wherein the cleaning operation is turned on and turned off by the cleaning operation module according to predetermined times. ### Claim 18 (depends on 11) The method, as recited in claim 11, wherein the cleaning operation is turned on and turned off by the cleaning operation module according to a predetermined number of usage loads of the raw materials pumped to the freezing cylinder. ### Claim 19 (depends on 18) The method, as recited in claim 18, wherein a sensor is connected to the freezing cylinder for detecting the usage loads of the liquid containers. ### Claim 20 (depends on 11) The method, as recited in claim 11, wherein the step (d) further comprises a step of heating the water and the one or more detergents passing through the feeding channel of the freezing cylinder by the heating unit.