Abstract: A heat exchanger cap, and method of manufacture of a heat exchanger cap configured to conform to a human head the cap comprising a first element for covering one side of the head; a second element for covering the other side of the head; and an intermediate joining element joined to, and which spaces apart, the first element and second element. Each of the elements define a single passageway for the passage of fluid through the cap. Each of the elements are provided with a flow interface in the region where the elements are joined. The flow interface defines an inlet for the passage of fluid into the passageway of one of the elements, and an outlet for the passage of fluid from the passageway out of the same element.

Abstract: A temperature control system comprising a first peripheral fluid circuit for the passage of a first heat exchanger fluid. The first peripheral fluid circuit comprises a first fluid connection for fluidly connecting a first peripheral heat exchanger in series with a first peripheral-evaporator heat exchanger. There is also provided a first peripheral pump for pumping the first heat exchanger fluid around the first peripheral fluid circuit. There is also provided a first evaporator circuit for the passage of an evaporator heat exchanger fluid through the first peripheral-evaporator heat exchanger. The first evaporator circuit comprises a first evaporator pump for pumping the evaporator heat exchanger fluid around the first evaporator circuit. The first evaporator circuit is fluidly isolated from the first peripheral fluid circuit. The first peripheral-evaporator heat exchanger is configured to permit heat exchange between the heat exchanger fluids.

Abstract: A heat exchanger, and method of manufacture of a heat exchanger configured to be placed into contact with an object to regulate the temperature of the object. The heat exchanger comprises a layer of material defining a passage through which a heat transfer fluid may flow. The material layer has a first side for contact with the object; and a second side which, in use, will face away from the object. The first side has a relatively high coefficient of thermal conduction. The second side has a relatively low coefficient of thermal conduction compared to the first side.

Abstract: A temperature control system (300) comprising a first peripheral fluid circuit (312) for the passage of a first heat exchanger fluid. The first peripheral fluid circuit (312) comprises a first fluid connection (314) for fluidly connecting a first peripheral heat exchanger (310) in series with a first peripheral-evaporator heat exchanger (316). There is also provided a first peripheral pump (318) for pumping the first heat exchanger fluid around the first peripheral fluid circuit (312). There is also provided a first evaporator circuit (320) for the passage of an evaporator heat exchanger fluid through the first peripheral-evaporator heat exchanger (316). The first evaporator circuit (320) comprises a first evaporator pump (322) for pumping the evaporator heat exchanger fluid around the first evaporator circuit (320). The first evaporator circuit (320) is fluidly isolated from the first peripheral fluid circuit (312).

Abstract: A heat exchanger, and method of manufacture of a heat exchanger configured to be placed into contact with an object to regulate the temperature of the object. The heat exchanger comprises a layer of material defining a passage through which a heat transfer fluid may flow. The material layer has a first side for contact with the object; and a second side which, in use, will face away from the object. The first side has a relatively high coefficient of thermal conduction. The second side has a relatively low coefficient of thermal conduction compared to the first side.

Abstract: A heat exchanger cap, and method of manufacture of a heat exchanger cap configured to conform to a human head the cap comprising a first element for covering one side of the head; a second element for covering the other side of the head; and an intermediate joining element joined to, and which spaces apart, the first element and second element. Each of the elements define a single passageway for the passage of fluid through the cap. Each of the elements are provided with a flow interface in the region where the elements are joined. The flow interface defines an inlet for the passage of fluid into the passageway of one of the elements, and an outlet for the passage of fluid from the passageway out of the same element.