# US 11,906,233 B2 · Defrost control method in a refrigeration installation and associated control device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,233 B2 - Document ID: US11906233B2 - Status: Granted - Kind: B2 - Application number: 17/610,757 - Filed: 2020-05-12 - Published: 2022-08-18 - Granted: 2024-02-20 - Earliest claimed: 2019-05-14 - Assignees: Eliwell Controls S.R.L. Con Unico Socio - Applicants: Eliwell Controls S.R.L. Con Unico Socio - Inventors: Antonello Tollot; Carlo Tona; Devis Marcon; Angelo Soccal; Vito Russo - Web page: https://patentgrep.com/patent/US11906233B2 ## CPC - F25D 21/006: {with electronic control circuits} - F25B 47/02: Defrosting cycles - F25D 21/008: {by timer} - F25B 2347/02: Details of defrosting cycles - F25D 2400/361: Interactive visual displays - F25D 2600/02: Timing - F25D 2600/06: Controlling according to a predetermined profile - F25D 2700/10: Sensors measuring the temperature of the evaporator - F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B) - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS ## Abstract A method to manage defrosting of a refrigeration plant provided with at least one compressor and at least one evaporator, including defining a plurality of defrosting modes, which can be selected by the manufacturer and/or by the end user, which are based on one or more functioning parameters of the refrigeration plant; such functioning parameters are detected by detection probes provided in the refrigeration plant such as pressure switches, thermostats, timing devices or other, associated with the compressor and/or the evaporator, or other; and memorizing the plurality of defrosting modes in an electronic device to manage the defrosting. ## Claims ### Claim 1 A method to manage defrosting of a refrigeration plant provided with at least one compressor and at least one evaporator, the method comprising: defining a plurality of defrosting modes, which can be selected by the end user in a non-exclusive manner, which are based on one or more functioning parameters of the refrigeration plant, said functioning parameters being detected by means of detection probes provided in the refrigeration plant comprising at least one of pressure switches, thermostats, and timing devices associated with said compressor and/or said evaporator; and memorizing said plurality of defrosting modes in an electronic device to manage the defrosting, said electronic device being configured by the end user through means able to select said plurality of defrosting modes, in which the functioning parameters of the refrigeration plant are selected and adjustable by the end user for each of the defrosting modes memorized in the electronic device, such that said defrosting modes are activated individually or in a modular manner. ### Claim 2 (depends on 1) The method as in claim 1, further comprising the selection of at least one defrosting mode based on a functioning time of the compressor of the refrigeration plant. ### Claim 3 (depends on 1) The method as in claim 1, further comprising the selection of at least one defrosting mode based on a functioning time of the refrigeration plant. ### Claim 4 (depends on 1) The method as in claim 1, further comprising the selection of at least one defrosting mode based on detection of a stoppage of the compressor. ### Claim 5 (depends on 1) The method as in claim 1, further comprising the selection of at least one defrosting mode based on a functioning time during which the compressor has remained activated. ### Claim 6 (depends on 1) The method as in claim 1, further comprising the selection of at least one defrosting mode based on the detection of the temperature of the evaporator below a certain set value. ### Claim 7 (depends on 1) The method as in claim 1, further comprising the selection of at least one defrosting mode based on a temperature range defined by the temperature difference detected by at least two probes in two distinct zones of the refrigeration plant. ### Claim 8 (depends on 1) The method as in claim 1, further comprising the selection of at least one defrosting mode based on time periods or time intervals set by the user. ### Claim 9 An electronic device to manage defrosting of a refrigeration plant comprising: a compressor; an evaporator; and means to configure the electronic device and to select a plurality of defrosting modes, which can be selected in a mutually non-exclusive manner by the end user, which are based on one or more functioning parameters of the refrigeration plant, said functioning parameters being detected by detection probes provided in the refrigeration plant comprising at least one of pressure switches, thermostats, and timing devices associated with said compressor and/or with said evaporator, said defrosting modes being activated individually or in a modular manner by the end user and the functioning parameters of the refrigeration plant being selected and adjustable by the end user for each of the defrosting modes memorized in the electronic device.