Abstract: Means for a thermally conductive and electrically insulating material 1 containing an AlN crystal 150 mainly comprising AlN, and a production method thereof. In production, a molten aluminum layer is formed on an AlN substrate 11 with at least its surface comprising AlN in an atmosphere of a non-oxidizing gas, and the molten aluminum layer is then heated in an atmosphere of N2 gas to form an AlN crystal 150 which mainly comprises an AlN layer 125. The means are also a thermally conductive and electrically insulating material having an AlN crystal and an Al gradient layer, and a production method thereof. In production, a heating step of forming a molten aluminum layer 15 on the AlN layer 125 and heating it in an atmosphere of N2 gas is repeated at least twice or more. At this time, the amount of the N2 gas dissolved in the molten aluminum layer is decreased as the heating step is repeated.

Abstract: A flow passage through which a heat exchange medium flows is formed at least at a part of each airflow duct 3 to 6, and the heat exchange medium flowing through the passage (t) is allowed to cool or heat air flowing through the airflow duct 3 to 6. Alternatively, a heat generation film H is formed at a part of an inner surface of an air passage of each airflow duct 3 to 6 and is allowed to heat air flowing through the airflow duct 3 to 6. Because the airflow ducts 3 to 6 per se are first cooled or heated by the heat exchange medium flowing through the passage (t), the heat exchange loss with the airflow ducts, that has occurred in the prior art, can be eliminated. Because air conditioning wind is cooled or heated inside the airflow ducts 3 to 6, too, instantaneous cooling/warming performance can be improved.

Abstract: A heat exchange member comprising a liquid layer and a solid layer capable of conducting a heat exchange reaction with the liquid layer upon their solid-liquid contact at an interface between the solid layer and the solid layer, wherein the solid layer further comprises on a surface thereof which is contacted with the liquid layer a surface coating layer capable of reducing a difference of the vibration between a thermal vibration of the solid and a thermal vibration of the liquid, and the surface coating layer comprises a plurality of fibrous structures arranged on a surface of the solid layer, and a heat exchange apparatus using the heat exchange member.

Abstract: An Al—AlN composite material, a heat exchanger and a related manufacturing method are disclosed. The Al—AlN composite material aluminum is manufactured by melting aluminum to allow a layer of melted aluminum to flow in an area over one surface of an AlN plate under an inactive gas atmosphere after which the layer of melted aluminum is solidified to form an Al plate bonded to the AlN plate. The heat exchanger includes the Al—AlN composite material forming at least part of a cooling medium flow passage with the AlN plate held in thermal contact with a heating body. The manufacturing method comprises melting aluminum to allow a layer of melted aluminum to flow in an area over one surface of an AlN plate under inactive gas atmosphere, and solidifying the layer of melted aluminum to form the Al plate bonded to the AlN plate.

Abstract: Means for a thermally conductive and electrically insulating material 1 containing an AlN crystal 150 mainly comprising AlN, and a production method thereof. In production, a molten aluminum layer is formed on an AlN substrate 11 with at least its surface comprising AlN in an atmosphere of a non-oxidizing gas, and the molten aluminum layer is then heated in an atmosphere of N2 gas to form an AlN crystal 150 which mainly comprises an AlN layer 125. The means are also a thermally conductive and electrically insulating material having an AlN crystal and an Al gradient layer, and a production method thereof. In production, a heating step of forming a molten aluminum layer 15 on the AlN layer 125 and heating it in an atmosphere of N2 gas is repeated at least twice or more. At this time, the amount of the N2 gas dissolved in the molten aluminum layer is decreased as the heating step is repeated.

Abstract: A heat transport medium includes a single solvent and fine particles 1 of a predetermined material dispersed in the solvent, and transports heat transferred from a heat transfer surface 5. Fine particles 1 includes one or more atoms, and structural substances 3 are arranged on a surface of fine particles 1 to protect it. Furthermore, structural substances 3 having a functional group capable of adsorbing onto fine particles 1 are floated around fine particles 1 in a state where structural substances are not adsorbed onto the fine particle. Also, structural substances 3 adsorbed onto the surface of fine particles 1 are arranged so as to form spaces which enable the floating structural substances 3 to adsorb around the fine particle.

Abstract: A heat transport medium comprises a single solvent and fine particles 1 of a predetermined material dispersed in the solvent, and transports heat transferred from a heat transfer surface 5. The fine particles 1 consist of one or more atoms, and have a structural substances 3 arranged on the surfaces to protect the fine particles 1. The heat transport medium satisfies a relationship among a diameter A, a length B and an average clearance distance C, which is represented by the expressions A?B, and B?C/2, wherein the diameter A is the diameter of a solvent molecule 2 composing the solvent, the length B is a length of a structural substance 3 extending from a functional group 3a to be adsorbed on the fine particles 1, and the average clearance distance C is an average distance between the fine particles dispersed in the solvent.

Abstract: A heat transport fluid includes a solvent, particles dispersed in the solvent, coating agents attached to surfaces of the particles, and organic components dispersed in the solvent. The heat transport fluid can be used for a heat transport structure that includes a first member having a first temperature, a second member having a second temperature higher than the first temperature, and a circulation device for circulating the heat transport fluid through the first member and the second member.

Abstract: A heat transport medium for transporting heat transferred from a heat transfer surface includes a liquid medium, and fine particles of a predetermined material dispersed into the liquid medium. The fine particles are contained in the liquid medium in volume content to provide an improvement rate of a heat transfer coefficient of about 1.0 or more. Here, the heat transfer coefficient is an index representing ease of heat transfer of the medium between the heat transfer surface and the medium by addition of the fine particles.

Abstract: A heat transport medium transports heat transferred from a heat transfer surface 5, the medium comprising a single solvent and containing microparticles 1 of a predetermined substance, wherein the microparticle 1 comprises one or more atoms, structures 3 for protecting the microparticle 1 are arranged on the microparticle surface and, if the diameter of a solvent molecule 2 constituting the medium is a and the length from a functional group 3a of the structure 3, which adsorbs to the microparticle 1, is b, the diameter a and the length b are set to satisfy the relationship a?b.

Abstract: A plurality of angle portions 2c of the fins on an upstream side and those on a downstream side of an air flow are provided so as to be substantially symmetrical with each other. Due to this, bending forces are continuously exerted on a thin plate-like fin material in a direction where the bending deformation of the fin material is cancelled, during the fin forming process. Accordingly, when the angle portions 2c are formed it can be prevented in advance that the fin material 11 is deformed in a state where the repeated deformations of the fin material 11 are accumulated in the same direction.

Abstract: A plurality of angle portions 2c of the fins on an upstream side and those on a downstream side of an air flow are provided so as to be substantially symmetrical with each other. Due to this, bending forces are continuously exerted on a thin plate-like fin material in a direction where the bending deformation of the fin material is cancelled, during the fin forming process. Accordingly, when the angle portions 2c are formed it can be prevented in advance that the fin material 11 is deformed in a state where the repeated deformations of the fin material 11 are accumulated in the same direction.

Abstract: Fins such as corrugated fins or plate fins are formed with meandering projections. A fluid such as air strikes bent parts of the meandering projections or grooves at the back sides while flowing along the fins and becomes turbulent and therefore flows while meandering so as to be directed toward the surfaces of tubes, so flows not only contacting the front and back surfaces of the fins without leaving any dead space, but also striking the surfaces of the tubes. Due to this, no boundary layers are formed at the surfaces of the fins or tubes, so heat conduction is promoted and therefore the heat exchange efficiency between a first fluid such as a refrigerant flowing through the insides of the tubes and a second fluid such as air flowing outside is remarkably improved.

Abstract: In a heat exchanger for cooling air, tubes are disposed vertically and header tanks are connected to the ends of the tubes. The lower side header tank is formed with drains, which are depressions, at positions between the tubes so that condensed water, which accumulates on the lower side header tank, drains away through the drains. Each of the drains has substantially a V-shaped cross-section to facilitate drainage of the water.

Abstract: A heat exchanger for heating comprises a plurality of heat transfer plate members (34) arranged in parallel with each other at predetermined intervals; and connecting portions (35, 36) for integrally connecting the plurality of heat transfer plate members (34) to each other, wherein air passages (37) are formed between the plurality of heat transfer plate members (34), inner fluid passages (31) are formed in the heat transfer plate members (34), fluid, for heating air which passes in the air passages (37), flows in the inner fluid passages (31), and an electric heat generating film (40), for heating the air which passes in the air passages (37), is formed on surfaces of the plurality of heat transfer plate members (34).

Abstract: An electrical heater includes plural heating body plates arranged in parallel with each other to define an air passage between adjacent two thereof, a positive electrode member joined to one end side of each heating body plate, and a negative electrode member joined to the other end side of each heating body plate. In the electrical heater, the heating body plates are arranged to directly heat air passing through the air passage when electrical power is supplied to the heating body plates through the electrode members. Accordingly, the electrical heater can effectively heat air with a simple structure.

Abstract: A heat-transmitting plate member has a pair of heat-transmitting plates. Each of the plates is made from a resin material. The heat-transmitting plate member has an inner passage through which inner fluid flows and a tank portion communicating with the inner passage. The tank portion has a thickness thicker than that of a portion corresponding to the inner passage in the heat-transmitting plate member, so that desired heat-exchange characteristic at the inner passage can be obtained while desired ability to withstand pressure at the tank portion is obtained.

Abstract: A flow passage through which a heat exchange medium flows is formed at least at a part of each airflow duct 3 to 6, and the heat exchange medium flowing through the passage (t) is allowed to cool or heat air flowing through the airflow duct 3 to 6. Alternatively, a heat generation film H is formed at a part of an inner surface of an air passage of each airflow duct 3 to 6 and is allowed to heat air flowing through the airflow duct 3 to 6. Because the airflow ducts 3 to 6 per se are first cooled or heated by the heat exchange medium flowing through the passage (t), the heat exchange loss with the airflow ducts, that has occurred in the prior art, can be eliminated. Because air conditioning wind is cooled or heated inside the airflow ducts 3 to 6, too, instantaneous cooling/warming performance can be improved.

Abstract: A radiator for a vapor-compression refrigerant cycle and a condenser for a Rankine cycle are integrated to construct a heat exchanger. The heat exchanger includes a core portion for performing a heat exchange, and is disposed to have a first function portion used as the radiator and a second function portion used as the condenser. A function ratio changing ratio includes a displacement member such as a plunger disposed in a header tank of the heat exchanger, and changes a ratio between the first function portion and the second function portion. For example, the displacement member partitions an inner space of the header tank into two space parts when both the vapor-compression refrigerant cycle and the Rankine cycle are operated, and does not partition the inner space when only one of the vapor-compression refrigerant cycle and the Rankine cycle is operated.

Abstract: In a vehicle air conditioning system, a cold accumulator is disposed between a downstream air side of a cooling heat exchanger and an upstream air side of a heating heat exchanger to be cooled by cold air having passed through the cooling heat exchanger. Further, the cold accumulator is disposed at the upstream air side of an air mixing door.