1193 results about "Thermoelectric element" patented technology

An improved efficiency thermoelectric system and method of making such a thermoelectric system are disclosed. Significant thermal isolation between thermoelectric elements in at least one direction across a thermoelectric system provides increased efficiency over conventional thermoelectric arrays. Significant thermal isolation is also provided for at least one heat exchanger coupled to the thermoelectric elements. In one embodiment, the properties, such as resistance or current flow, of the thermoelectric elements may also be varied in at least one direction across a thermoelectric array. In addition, the mechanical configuration of the thermoelectric elements may be varied, in one embodiment, according to dynamic adjustment criteria.

A thermoelectric system and method provides distributed localized heating, cooling, or both heating and cooling. The thermoelectric system includes a plurality of thermoelectric assemblies. Each thermoelectric assembly comprises a plurality of thermoelectric elements, and each thermoelectric assembly is in thermal communication with a first working fluid and in thermal communication with a region corresponding to the thermoelectric assembly. Each thermoelectric assembly is selectively operable either to heat the region corresponding to the thermoelectric assembly by transferring heat from the first working fluid to the region corresponding to the thermoelectric assembly or to cool the region corresponding to the thermoelectric assembly by transferring heat from the region corresponding to the thermoelectric assembly to the first working fluid. Each thermoelectric assembly is operable independently from operation of other thermoelectric assemblies of the plurality of thermoelectric assemblies.

A thermoelectric heat pump module of the type used in small cooling applications and appliances, such as a thermoelectric picnic cooler. The module comprises an array of thermoelectric elements with cold-side connectors directly bonded to a large, unitary cold sink for support, and hot-side connectors each having an integrated heat exchange fin to form a small, lightweight, but efficient hot sink array directly bonded to the elements without thermal stress. The cold sink is larger than the hot sink array. The cold-side connectors and at least portions of the thermoelectric elements are sealed and supported with a layer of potting material built up from the surface of the cold sink, and optionally insulated with an additional layer of sealed foam, eliminating moisture vapor transmission, condensation, and corrosion in the module. In a preferred form, the elements and their finned hot-side connectors are arranged in an elongated, narrow-depth array designed to be placed perpendicular to a flow of cooling air, and allowing multiple modules to be used in a distributed pattern with a single air-mover such as a fan.

Some embodiments provide a waste heat recovery apparatus including an exhaust tube having a cylindrical outer shell configured to contain a flow of exhaust fluid; a first heat exchanger extending through a first region of the exhaust tube, the first heat exchanger in thermal communication with the cylindrical outer shell; a second region of the exhaust tube extending through the exhaust tube, the second region having a low exhaust fluid pressure drop; an exhaust valve operatively disposed within the second region and configured to allow exhaust fluid to flow through the second region only when a flow rate of the exhaust fluid becomes great enough to result in back pressure beyond an allowable limit; and a plurality of thermoelectric elements in thermal communication with an outer surface of the outer shell.

A thermoelectric device with an improved thermal efficiency has an object to be heated or cooled having a surface, at least one electrically conductive lower pad bonded directly to the surface of the object using a thermally conductive dielectric material, at least one thermoelectric element coupled on one end to the electrically conductive pad, at least one electrically conductive upper pad coupled to an opposite end of the thermoelectric element, and electrical power connections coupled to the device.

A thermoelectric device having at least one thermoelectric unit including at least one thermoelectric pair of n-type and p-type thermoelements, a first header coupled to one side of the thermoelectric pair, and a second header coupled to a second side of the thermoelectric pair. The thermoelectric pair has a thermal conduction channel area smaller than an area of the first header or the second header such that the thermal conduction area is a fraction of the area of the first header or the second header.

A thermoelectric system is provided which includes at least one tubular conduit configured to be in thermal communication with at least one first fluid flowing through the at least one tubular coolant conduit in a first direction. A plurality of thermoelectric elements can be in thermal communication with the at least one tubular conduit. A heat exchanger in thermal communication with the plurality of thermoelectric elements is configured to be in thermal communication with at least one second fluid and to surround at least a portion of the tubular conduit and plurality of thermoelectric elements. The heat exchanger can include at least one coating configured to catalyze reactions of at least one portion of the second fluid.

A thermoelectric cooling apparatus which includes a Peltier device or a thermoelectric element coupled to a hot source and a cold sink. The hot source dissipates heat produced by the thermoelectric element. The cold sink is coupled to a mass to be cooled. A means for supplying power to the thermoelectric element is provided and a means for selectively thermally coupling the thermoelectric element to the hot source is provided. Selectively thermally switching the thermoelectric element to the hot source allows heat to be dissipated to the hot source when the thermoelectric element possesses excess heat. Dissipating the excess heat when the excess heat is present allows higher efficiencies to be attained in thermoelectric cooling.

To keep a temperature of an interior of an automotive vehicle at least at a level of an external atmospheric temperature even if the vehicle is parked with an engine being stopped for a long time, an automotive air-conditioning apparatus is composed of a cooling device 12 to be controlled by a controller 13, a pre-cooling device 20 for pre-cooling the interior of the vehicle, and a sub-controller 18 for controlling the pre-cooling device. The pre-cooling device is composed of a cooling thermoelectric element module 22, a ventilation fan 23, a solar battery 21 and a pre-cooling storage battery 24 charged by the solar battery. The sub-controller always operates the pre-cooling device 20 while the vehicle is stopped with the engine being stopped and starts the pre-cooling device 20, for example, one hour prior to a time when the vehicle starts to movement during parking for a long time in an interior parking lot or the like with the engine being stopped so that the temperature of the interior of the vehicle is kept at a temperature that does not so much exceed a set temperature, i.e., at least at the level of the external atmospheric temperature, until the engine is started.

A thermoelectric cooling and heating device including a substrate, a plurality of thermoelectric elements arranged on one side of the substrate and configured to perform at least one of selective heating and cooling such that each thermoelectric element includes a thermoelectric material, a Peltier contact contacting the thermoelectric material and forming under electrical current flow at least one of a heated junction and a cooled junction, and electrodes configured to provide current through the thermoelectric material and the Peltier contact. As such, the thermoelectric cooling and heating device selectively biases the thermoelectric elements to provide on one side of the thermolectric device a grid of localized heated or cooled junctions.

A thermoelectric generator has a high temperature heat source part provided on a first passage through which a first fluid for cooling an engine flows, a low temperature heat source part provided on a second passage through which a second fluid having a temperature lower than that of the first fluid flows, and a thermoelectric element for producing electric power by a temperature difference produced between the high temperature heat source part and the low temperature heat source part. The first passage is included in a first circuit in which the engine and a first radiator for cooling the first fluid are connected in loop through a main passage. Further, the first passage is in parallel to the first radiator in the first circuit. The second passage is included in a second circuit that is separate from the first circuit and includes a second radiator for cooling the second fluid.

A thermoelectric transducer includes a thermoelectric element module in which a plurality of pairs of P-type and N-type thermoelectric elements are arranged to be electrically connected in series. The thermoelectric element module includes a first terminal connected to an electric power input side of the thermoelectric elements, a second terminal connected to an electric power output side of the thermoelectric elements, and a third terminal arranged at one position or plural positions between the first terminal and the second terminal and used for detecting electric potential at the one position or plural positions. A control device controls the thermoelectric element module on the basis of voltage between the respective terminals determined by electric potentials from the respective terminals when electric power is applied between the first terminal and the second terminal.

There is provided a thermoelectric device capable of improving a power generation performance while keeping a hermetic sealing after a heat cycle is applied, and also achieving simplification of a structure and improvement in productivity and reliability of a device by reducing the number of articles, and a method of manufacturing the same.

A thermoelectric device, includes a metal substrate 2, a thermoelectric element 3 mounted on a center portion of a surface of the metal substrate 2, a metal lid 4 for covering an upper surface and side surfaces of the thermoelectric element 3, and a joining metal member 5 provided to a peripheral portion of a surface of the metal substrate 2 to hermetically seal a space between the metal substrate 2 and the lid 4.

A thermoelectric apparatus is composed of a heat-absorbing-side heat-exchanging base and a heat-dissipating-side heat-exchanging base having good thermal conductivity and arranged in a mutually opposing relationship with a group of thermoelectric elements interposed therebetween. The thermoelectric apparatus comprises a frame made of a synthetic resin material and holding one of the heat-absorbing-side heat-exchanging base and the heat-dissipating-side heat-exchanging base at an outer peripheral portion thereof. The frame and the other heat-exchanging base, which is not held by the frame, are both provided with extended portions extending substantially along and substantially in the same direction as a stacked direction of the heat-absorbing-side heat-exchanging base, the group of thermoelectric elements and the heat-dissipating-side heat-exchanging base. The extended portions are joined together.

A thermoelectric device is provided that includes a top plate with surface including a first and second portion. A first plurality of thermoelectric elements are coupled to the first portion, and a second plurality of thermoelectric elements are coupled to the second portion. A base plate is coupled to the first and second plurality of thermoelectric elements. The first and second plurality of thermoelectric elements are operable to transfer thermal energy from the top plate to the base plate when an electrical current is passed through the first and second plurality of thermoelectric elements. The second plurality of thermoelectric elements receives a higher electrical current density than the first plurality of thermoelectric elements, and the second plurality of thermoelectric elements transfer more thermal energy per unit area of the top plate than the first plurality of thermoelectric elements.

The present invention provides a thermoelectric element comprising an electrically conductive substrate, a p-type thermoelectric material, and an n-type thermoelectric material; the p-type thermoelectric material being positioned on the substrate via an electrically conductive thermal buffer material, and the n-type thermoelectric material being positioned on the substrate via an electrically conductive thermal buffer material; wherein each thermoelectric material comprises a specific oxide and each electrically conductive thermal buffer material comprises an electrically conductive material having a thermal expansion coefficient between that of the thermoelectric material to which the thermal buffer material is bonded and that of the substrate. The invention also provides a thermoelectric module comprising a plurality of the thermoelectric elements. The thermoelectric element and the thermoelectric module have both a high thermoelectric conversion efficiency and excellent properties in terms of thermal stability, chemical durability, etc.

A vertical, monolithic, thin-film thermoelectric device is described. Thermoelectric elements of opposing conductivity types may be coupled electrically in series and thermally in parallel by associated electrodes on a single substrate, reducing the need for mechanisms to attach multiple substrates or components. Phonon transport may be separated from electron transport in a thermoelectric element. A thermoelectric element may have a thickness less than an associated thermalization length. An insulating film between an electrode having a first temperature and an electrode having a second temperature may be a low-thermal conductivity material, a low-k, or ultra-low-k dielectric. Phonon thermal conductivity between a thermoelectric element and an electrode may be reduced without a significant reduction in electron thermal conductivity, as compared to other thermoelectric devices. A phonon conduction impeding material may be included in regions coupling an electrode to an associated thermoelectric element (e.g., a liquid metal).