# US 8,739,565 B2 · Machine for producing and dispensing liquid and semi-liquid consumer food products > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,565 B2 - Document ID: US8739565B2 - Status: Granted - Kind: B2 - Application number: 12/320,303 - Filed: 2009-01-23 - Published: 2009-08-06 - Granted: 2014-06-03 - Earliest claimed: 2008-01-31 - Assignees: Carpigiani Group - Ali S.P.A. - Applicants: Gino Cocchi; Gianni Zaniboni; Roberto Lazzarini - Inventors: Gino Cocchi; Gianni Zaniboni; Roberto Lazzarini - Web page: https://patentgrep.com/patent/US8739565B2 ## CPC - A23G 9/22: Details, component parts or accessories of apparatus insofar as not peculiar to a single one of the preceding groups - A23G 9/28: for portioning or dispensing - A23G: COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF ## Abstract A machine for producing liquid and semi-liquid consumer food products comprises one or more containers (2) for a basic product of the consumer product to be made; a refrigeration system (3) acting on the containers (2) to reduce the temperature of the basic product; the refrigeration system (3) comprising a predetermined refrigerant; the refrigerant being carbon dioxide and the refrigeration system (3) being set up to carry out a transcritical refrigeration cycle on the refrigerant. ## Claims ### Claim 1 A machine for producing liquid and semi-liquid consumer food products, comprising: at least one container for containing a basic product of at least one chosen from a liquid and a semi-liquid consumer food product; a refrigeration system including a compressor, the refrigeration system acting on the container for lowering a temperature of the basic product; the refrigeration system comprising carbon dioxide as a refrigerant; the refrigeration system performing a transcritical refrigeration cycle on the refrigerant; a heating circuit connected to the at least one container for increasing the temperature of the basic product; wherein the refrigeration system comprises an evaporator in contact with the container, in fluid communication with the compressor, in which the compressed refrigerant is heated, absorbing heat from the container; wherein the heating circuit comprises a branch in fluid connection with a compressor delivery side; wherein the heating circuit is in fluid communication with the evaporator; and further comprising at least one valve positioned in each of the refrigeration system and the heating circuit to selectively isolate the heating circuit for the evaporator from the refrigerator system for the evaporator; wherein the refrigeration system also comprises a control system for preventing a pressure of the refrigerant from exceeding a predetermined safety value, the control system including a pressure sensor for measuring a pressure of the refrigerant output from the compressor, the control system acting on the compressor to reduce a thermal power supplied to the refrigerant during compression to prevent the pressure of the refrigerant from exceeding the predetermined safety value. ### Claim 2 (depends on 1) The machine according to claim 1, wherein the refrigeration system comprises at least a compressor for compressing a flow of refrigerant from a first pressure which is lower than a refrigerant critical pressure to a second pressure which is higher than the refrigerant critical pressure. ### Claim 3 (depends on 2) The machine according to claim 2, wherein the compressor is a single-stage type. ### Claim 4 (depends on 3) The machine according to claim 3, comprising a plurality of single-stage compressors mounted in tandem. ### Claim 5 (depends on 2) The machine according to claim 2, wherein the compressor is an intercooler two-stage type. ### Claim 6 (depends on 5) The machine according to claim 5, wherein the compressor comprises an electric motor and an inverter connected to the electric motor for continuously controlling a motor speed of rotation. ### Claim 7 (depends on 6) The machine according to claim 6, wherein the compressor comprises an electric motor; the electric motor being an asynchronous type. ### Claim 8 (depends on 6) The machine according to claim 6, wherein the compressor comprises an electric motor; the electric motor being a brushless type. ### Claim 9 (depends on 8) The machine according to claim 8, wherein the refrigeration system comprises a gas-cooler located downstream of the compressor for increasing/lowering a temperature of the flow of compressed refrigerant. ### Claim 10 (depends on 9) The machine according to claim 9, wherein the gas-cooler comprises at least a radiator and a fan for generating an air flow to remove heat from the flow of compressed refrigerant. ### Claim 11 (depends on 9) The machine according to claim 9, wherein the gas-cooler comprises at least a hydraulic circuit for removing heat from the flow of compressed refrigerant. ### Claim 12 (depends on 11) The machine according to claim 11, wherein the refrigeration system also comprises an intermediate heat exchanger located upstream of the compressor for cooling the flow of refrigerant entering the compressor. ### Claim 13 (depends on 12) The machine according to claim 12, wherein the refrigeration system also comprises a throttling element located upstream of the evaporator and in fluid communication with the compressor for causing the compressed refrigerant to expand. ### Claim 14 (depends on 13) The machine according to claim 13, wherein the throttling element also comprises an expansion valve. ### Claim 15 (depends on 14) The machine according to claim 14, wherein the expansion valve is a thermostatic expansion valve. ### Claim 16 (depends on 15) The machine according to claim 15, wherein the thermostatic expansion valve comprises an external equalizer. ### Claim 17 (depends on 13) The machine according to claim 13, wherein the throttling element comprises a fixed capillary tube. ### Claim 18 (depends on 13) The machine according to claim 13, wherein the throttling element comprises an adjustable automatic valve. ### Claim 19 (depends on 13) The machine according to claim 13, wherein the throttling element comprises a pulse valve. ### Claim 20 (depends on 13) The machine according to claim 13, wherein the throttling element comprises an electronic valve. ### Claim 21 (depends on 1) The machine according to claim 1, comprising a plurality of containers for a basic product of the consumer product to be made, each of the containers being connected to a respective evaporator. ### Claim 22 (depends on 21) The machine according to claim 21, wherein it is a machine for whipping and freezing. ### Claim 23 (depends on 21) The machine according to claim 21, wherein it is a self-pasteurizing soft ice cream machine for producing and distributing ice creams. ### Claim 24 (depends on 21) The machine according to claim 21, wherein it is a crushed-ice drink maker. ### Claim 25 (depends on 21) The machine according to claim 21, wherein it is a pasteurizing machine. ### Claim 26 (depends on 21) The machine according to claim 21, wherein it is a cream whipping machine. ### Claim 27 (depends on 21) The machine according to claim 21, wherein it is a cream cooking machine. ### Claim 28 A method for producing liquid and semi-liquid consumer food products, comprising: providing at least one container for containing a basic product of at least one chosen from a liquid and a semi-liquid consumer food product; providing a refrigeration circuit acting on the container for lowering a temperature of the basic product; the refrigeration circuit comprising carbon dioxide as a refrigerant; the refrigeration circuit performing a transcritical refrigeration cycle on the refrigerant; providing a heating circuit connected to the at least one container for increasing the temperature of the basic product; and using compressed and heated refrigerant from the refrigeration circuit in the heating circuit for the increasing of the temperature of the basic product; providing the refrigeration system with a control system for preventing a pressure of the refrigerant from exceeding a predetermined safety value, the control system including a pressure sensor for measuring a pressure of the refrigerant output from a compressor of the refrigeration circuit for compressing the refrigerant, the control system acting on the compressor to reduce a thermal power supplied to the refrigerant during compression to prevent the pressure of the refrigerant from exceeding the predetermined safety value. ### Claim 29 (depends on 28) The method according to claim 28, wherein the temperature of the basic product is heated sufficiently to pasteurize the basic product. ### Claim 30 (depends on 28) The method according to claim 28, and further comprising providing at least one valve in each of the refrigeration circuit and the heating circuit to selectively isolate the heating circuit from the refrigeration circuit.