62results about How to "Small thermal hysteresis" patented technology

The invention relates to a surface heating light source, comprising a first electrode, a second electrode and a carbon nano-tube film; the first electrode and the second electrode are arranged on the carbon nano-tube film; the first electrode and the second electrode have a certain distance and electrically contact with the surface of the carbon nano-tube film; the carbon nano-tube film internally comprises carbon nano-tubes which enwind each other. The invention also relates to a preparation method used for preparing surface heating light source, comprising the steps as follows: carbon nano-tube raw material is provided; the carbon nano-tube raw material is added in solvent and carries out flocking disposal, thus gaining a carbon nano-tube floceulent structure; the carbon nano-tube floceuelent structure is separated from the solvent and shapes the carbon nano-tube floceulent structure so as to gain a carbon nano-tube film; the first electrode and the second electrode are provided; the first electrode and the second electrode are intermittently arranged on the surface of the carbon nano-tube film and form electric contact on the surface of the carbon nano-tube, thus gaining a surface heat light source. The invention also relates to a method used for heating the article by adopting the surface heat light source and comprises the steps as follows: an article to be heated is provided; the article is provided with a surface; the carbon nano-tube film in the surface heat light source is arranged closely to the surface of the article to be heated; voltage is applied to the electrodes in the surface heat light source so as to heat the article.

The invention relates to a heating device and a manufacturing method thereof. The heating device comprises a first electrode, a second electrode and a heating element, wherein the first electrode and the second electrode are arranged at interval; the heating element comprises a first substrate, a second substrate, a first bonding layer, a second bonding layer and a carbon nanotube structure; the carbon nanotube structure is arranged between the first substrate and the second substrate and is combined with the first substrate and the second substrate respectively through the first bonding layer and the second bonding layer; and the carbon nanotube structure is electrically connected with the first electrode and the second electrode.

The invention discloses a high-stability length expansion die quartz temperature sensor provided with non-contact electrodes and relates to the field of sensors. The sensor comprises a packaging bodyand a resonance component located in the packaging body, wherein the resonance component is made of a quantity crystal; and the resonance component is of an integrated structure and comprises a base with two I-shaped beams, a supporting frame, m comb pieces and n resonance arms, wherein the m comb pieces and the n resonance arms are located in the supporting frame, m and n are both positive integers, m is greater than n, and the quantity of the metal electrodes on the m comb pieces is 2n. A new structure of the multi-resonance-arm length expansion die quartz temperature sensor which is provided with the non-contact electrodes and can prevent and suppress leakage of resonance energy of the resonance arms is disclosed, a non-contact electrode structure which is made of a high-temperature-resistant and aging-resistant four-layer composite metal thin film is groped, therefore, the maximum working temperature can reach 300 DEG C or above, thermal hysteresis is lowered, and the long-term stability of the sensor is improved.

The invention relates to a sounding device which comprises an electromagnetic wave signal input device and a sounding element, wherein the electromagnetic wave signal input device comprises an electromagnetic wave generation device and a modulation device; the sounding element corresponds to the electromagnetic wave signal input device and is arranged at an interval to the electromagnetic wave signal input device; the modulation device is arranged between the electromagnetic wave generation device and the sounding element and positioned on the transmission path of an electromagnetic wave signal; the sounding element comprises at least one carbon nanometer tube linear structure; the electromagnetic wave signal input device is used for transmitting the electromagnetic wave signal to the at least one carbon nanometer tube linear structure; and the carbon nanometer tube linear structure generates sound wave by receiving the signal generated from the electromagnetic wave signal input device. The sounding device can be used in devices such as earphones, sound boxes, and radios which are capable of producing sound.

The invention relates to an alloy magnetocaloric material for magnetic refrigeration at a room temperature as well as a preparation method and application thereof. A chemical general formula of the material is MnCo1-xTixGe, wherein x is 0.02 to 0.08; the atomic percentage of a manganese element in the material is 33.3 to 34.4 percent; the atomic percentage of a cobalt element is 32.8 to 33.3 percent; the atomic percentage of a titanium element is 0.6 to 2.7 percent; and the atomic percentage of a germanium element is 30.2 to 32.7 percent. During preparation, reactants are added into a vacuum electric arc furnace; the vacuum electric arc furnace is vacuumized to 10<4> Pa or below, and high-purity argon gas is introduced; samples are melted for 2 to 5 times repeatedly; samples are taken out and cooled, and then put into a high-temperature resistant quartz glass test tube for vacuumizing; the high-purity argon gas is introduced to clean the gas and then put into a furnace type box; and the samples are taken out and annealed to obtain a finished product. Compared with the prior art, the alloy magnetocaloric material disclosed by the invention is a secondary phase change material, and has the characteristics of small heat stagnation and large regulated temperature zones; moreover, the problem of the heat stagnation caused by a primary phase change material can be effectively avoided; and a preparation process has simple steps, the condition controllability is good, and the material has good application prospect.

The invention relates to a sounding device comprising an electromagnetic wave signal input device and a sounding element, wherein the sounding element and the electromagnetic wave signal input device are arranged at intervals; the sounding element comprises at least one carbon nano tube film, and the carbon nano tube film includes a plurality of carbon nano tubes which are wound with each other; and the electromagnetic wave signal input device transmits an electromagnetic wave signal to the carbon nano tube film, thus the carbon nano tube film emits heat by absorbing the electromagnetic wave signal so as to heat an air medium to send sound waves.

The invention discloses an instant electric water heater; a vertical shunting clapboard is arranged in the middle part between the front and back sides of a box body to form a first cavity and a second cavity, a group of stream guidance holes are arranged at top part of the shunting clapboard, a group of stainless steel thermal energy pipes are uniformly distributed in the first cavity and the second cavity horizontally or vertically, and ports of the stainless steel thermal energy pipes are welded with the corresponding side plates of a box body in a penetrating way, a group of carbon fiber far infrared heating tubes are respectively arranged in the group of the stainless steel thermal energy pipes and are fixed by fixed clamping plates, a power supply input end of each carbon fiber far infrared heating tube body is electrically connected with an automatic thermostat by a wiring groove circuit board. the instant electric water heater has rapid heating, low power consumption, high hotwater yield, high electric-heating conversion efficiency, good safety and long service life and is energy saving and environmental protection.