# US 2004/0069481 A1 · On-vehicle air-conditioner for air-conditioning > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2004/0069481 A1 - Document ID: US20040069481A1 - Status: Published application - Kind: A1 - Application number: 10/258,084 - Filed: 2002-10-04 - Published: 2004-04-15 - Earliest claimed: 2001-02-13 - Assignees: Sanyo Electric Co., Ltd. - Inventors: Toshiyuki Ebara; Hirokazu Izaki; Tetsuya Masuda; Kazuaki Mizukami - Web page: https://patentgrep.com/patent/US20040069481A1 ## CPC - F25B 9/008: {the refrigerant being carbon dioxide} - B60H 1/00907: {where the flow direction of the refrigerant changes and an evaporator becomes condenser} - B60H 1/3227: {characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator (condensed liquid drainage means B60H1/3233)} - B60K 11/04: Arrangement or mounting of radiators, radiator shutters, or radiator blinds - B60K 11/085: {with adjustable shutters or blinds} - B60H 2001/00961: {comprising means for defrosting outside heat exchangers} - B60H 2001/3277: {to control the air flow} - F25B 9/002: {characterised by the refrigerant} - F25B 13/00: Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) - F25B 2309/061: with cycle highest pressure above the supercritical pressure - F25B 2400/12: Inflammable refrigerants - Y02T 10/88: Optimized components or subsystems, e.g. lighting, actively controlled glasses - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An on-vehicle air conditioner for air conditioning, comprising a refrigerating circuit having a refrigerant outside heat exchanger installed so as to perform a heat exchange with outside air and usable for both cooling and heating, a coolant circuit having a coolant outside heat exchanger installed so as to perform a heat exchange with the outside air and allowing the coolant of an engine to circulate therein, and at least one opening/closing duct for inflow air regulation installed on the forward outside and/or rearward inside of the refrigerant outside heat exchanger, wherein the opening and closing of the duct can be controlled properly according to the situations, whereby cabin cooling, cabin heating, and defrosting can be performed efficiently and sufficiently even if, for example, CO2 refrigerant is used in the cars such as hybrid cars using electricity and gasoline as energy sources and idle stop-capable cars. ## Claims ### Claim 1 An on-vehicle air-conditioner for air-conditioning comprising: a refrigeration circuit provided with a refrigerant car exterior heat exchanger installed for exchanging heat with the car exterior air that can be used for cooling and for heating, and at least one opening and closing duct for air inflow rate regulation installed in front of and/or behind said refrigerant car exterior heat exchanger. ### Claim 2 (depends on 1) The on-vehicle air-conditioner for air-conditioning of claim 1, wherein at least one of said ducts installed in front of and/or behind said refrigerant car exterior heat exchanger is controlled to close, for defrosting the frost deposited on said refrigerant car exterior heat exchanger by using the refrigeration circuit for heating during the travel in winter or others. ### Claim 3 (depends on 2) The on-vehicle air-conditioner for air-conditioning of claim 2, wherein at least one of said ducts installed in front of and/or behind said refrigerant car exterior heat exchanger is controlled to close, and the air used for cooling an engine, a motor or a motor driving circuit and increased in temperature is sent by lowering the speed of rotations through the reverse rotation of a fan so as to pass through said refrigerant car exterior heat exchanger, for defrosting the frost deposited on said refrigerant car exterior heat exchanger by using the refrigeration circuit for heating during the travel in winter or others. ### Claim 4 (depends on 2) The on-vehicle air-conditioner for air-conditioning of claim 2, wherein at least one of said ducts installed in front of and/or behind said refrigerant car exterior heat exchanger is controlled to close, and the said fan is stopped, for defrosting the frost deposited on said refrigerant car exterior heat exchanger by using the refrigeration circuit for heating during the travel in winter or others. ### Claim 5 (depends on 1) The on-vehicle air-conditioner for air-conditioning of claim 1, wherein at least one of said ducts installed in front of and/or behind said refrigerant car exterior heat exchanger is controlled to half-open, during the use of the refrigeration circuit for cooling during a summer hot traffic congestion or others. ### Claim 6 (depends on 1) The on-vehicle air-conditioner for air-conditioning of claim 1 wherein at least one of said ducts installed in front of and/or behind said refrigerant car exterior heat exchanger is controlled to half-open, in case where the direct sunshine affects adversely the heat exchange of said refrigerant car exterior heat exchanger, during the use of the refrigeration circuit for cooling. ### Claim 7 (depends on 1, 2, 3, 4, 5, 6) The on-vehicle air-conditioner for air-conditioning of any of claims 1 to 6, wherein the refrigerant is CO2. ### Claim 8 (depends on 1, 2, 3, 4, 5, 6) The on-vehicle air-conditioner for air-conditioning of any of claims 1 to 6, wherein the refrigerant is a hydrocarbon system refrigerant.