54results about How to "Stable temperature difference" patented technology

The invention discloses a testing apparatus and testing method of a thermoelectric conversion efficiency of a thermoelectric module group. A heating bench protection fence encircles the side surface of an electric heating bench; a measuring assembly for installing a thermoelectric module group is installed on the electric heating bench; and a compression assembly for compressing the measuring assembly is fixed on upper sides of support rods. An outer cover is arranged on a base plate. A gap of internal space between the base plate and the outer cover is filled with a thermal insulation material. The thermoelectric module group is heated and a cold end of the thermoelectric module group is cooled. The compression device applies pressures to guarantee the good contact among all contact surfaces, so that a stable temperature difference between the two ends of the thermoelectric module group is kept and an electromotive force is generated. With a peripheral circuit, calculation is carried out based on temperature values measured by an upper standard measuring block and a lower standard measuring block, thereby obtaining input powers of the thermoelectric module group on different conditions and a heat flow rate inputted into a hot end and thus obtaining a conversion efficiency. According to the invention, various thermoelectric performance parameters of the thermoelectric module group under different pressures and different temperature differences can be tested comprehensively and thus a basis is provided for evaluating the performance of the thermoelectric module group comprehensively.

The invention relates to the technical field of clothes nursing, and discloses an ironing machine supplementing water rapidly and conveniently. The ironing machine comprises an ironing machine body, abase, and a large water tank. The base is provided with a groove. The ironing machine body is internally provided with a small water tank, a steam generation assembly, and a pump body. A water absorption pipe is communicated between the pump body and the small water tank. The pump body is communicated with a water outlet pipe. The large water tank is provided with a water supplementing cover. Thewater supplementing cover is provided with a water outlet. The water outlet is provided with a valve body. The base is internally provided with a first water supplementing joint. The base is providedwith a trench. A water guiding pipe is communicated between the trench and the first water supplementing joint. The ironing machine body is provided with a second water supplementing joint. One end of the water supplementing joint is communicated with the small water tank. When the ironing machine body is placed in the groove, the first water supplementing joint and the second water supplementingjoint are abutted and communicated, and water in the large water tank flows into the small water tank through the water guiding pipe. When the ironing machine body is separated from the groove, the first water supplementing joint and the second water supplementing joint are separated and communication is stopped. The ironing machine is advantaged by convenient and rapid water supplement.

Various types of automobile exhaust waste heat generation devices at present are complex in process, high in cost, low in integration level, large in size and low in heat-electricity conversion efficiency. The invention discloses a thermopile which is high in integration level, simple in structure, low in cost and high in reliability; the invention also discloses an automobile exhaust waste heat generation and refrigeration device employing the thermopile as a core part for generation and refrigeration. P-type thermocouple arms formed in the shape of a rectangular cylinder and N-type thermocouple arms are arranged in a staggered manner. A heat-insulation and insulting film material is arranged between the adjacent thermocouple arms in an attaching manner for isolation, so that the convection of air is eliminated, the defect of the reduction of the temperature difference between cold and hot surfaces caused by radiation is overcome, and the heat-electricity conversion efficiency is improved. The electric connection between the thermocouple arms is achieved through flexible heat-conduction and electric-conduction materials, so that a thermal stress is alleviated, the adverse effect of the thermal stress on a product is eliminated, and the problem that the reliability and the service life of the product are affected seriously, caused by the deformation and cracking of the thermopile and falling of welding spots between the thermocouple arms which are caused by the thermal stress, is solved.

The invention relates to a multi-stage thermoelectric module with a phase change energy storage layer, which comprises a high-temperature layer, a middle-temperature layer and a low-temperature layer.Energy storage layers made of phase change material are located between the high-temperature layer, the middle-temperature layer and a low-temperature layer. The temperature difference between the hot and cold junctions of the thermoelectric module is stabilized by the heat absorption and heat release during the phase transition of the phase change material, and the temperature of each thermoelectric material is adjusted to be in the temperature range of its optimal performance to improve the overall thermoelectric conversion efficiency of the thermoelectric module.

The invention discloses a heat exchanger system for generating and strengthening negative pressure. The heat exchanger system comprises a waste gas flow equalizing pipe, connection branch pipes, guideblade fixing plates, waste gas channels and nozzles; the multiple guide blade fixing plates are installed around the same center of a circle in the circumferential direction and internally comprise the waste gas channels, industrial waste gas is guided into the waste gas flow equalizing pipe, thus, the waste gas uniformly flows into the waste gas channels in the guide blade fixing plates throughthe uniformly-distributed connection branch pipes at the same flow speed, the waste gas exchanges heat with external hot gas flow in the process of circulating in the waste gas channels, and finally,the waste gas is injected out through the waste gas nozzles in the tangential direction of waste gas outlets. The guide blade fixing plates of the heat exchanger system have the function of flow guiding and the function of a heat exchanger, the large heat exchange area and the long heat exchange time are ensured to the greatest extent through the waste gas channels in the guide blade fixing plates, by heating the external gas flowing through the system, the larger and stable temperature difference is provided, and higher negative pressure and the stable negative pressure zone are formed.

The invention discloses a method for planting collybia radicata in winter. At an earlier stage, through scientific and sterile mycelium culture, excellent hyphae are obtained, then after cultivation,a strict management method is implemented, wherein through accurate temperature and humidity control, the best growth conditions of mushrooms are guaranteed, meanwhile, the feature of low temperaturein winter is considered, in combination with kinds of anti-cold procedures which include laying and scattering of quick lime for increase in temperature and further include steam pipeline laying whichcan provide sufficient heat energy for the interior of a mushroom greenhouse at night, meanwhile, air humidity is kept, a warm-keeping quilt covers the exterior of the greenhouse additionally to ensure the stability of temperature difference at night in winter jointly, in daytime, according to sunlight, black thin films are set up to improve the effect of heat absorbing and realize sun shieldingappropriately to keep moisture on the surfaces of mushroom beds, and all the procedures jointly guarantee that collybia radicata grow well in winter; powerful technical supports are provided for anti-season planting of collybia radicata, meanwhile, the all-the-year demands for collybia radicata in the market are met, and the economic benefits of production families are increased.

The invention relates to a quasi-differential isothermal heat treatment method of a large-size rolling roller and belongs to the technical field of heat treatment. The treatment method comprises the steps that a suitable chamber type electric resistance furnace is selected according to the size and the requirement of the rolling roller needing to be treated; after ceramic fiber is utilized for protecting the roller neck of the rolling roller, the rolling roller is fixed to a supporting pad workpiece in the chamber type electric resistance furnace; firstly, heating is carried out according to the first preset temperature rising rate until the first stage temperature is reached, and heat is preserved for first preset time at the first stage temperature; then heating is carried out accordingto the second preset temperature rising rate, after the quenching temperature is reached, the heat is preserved for second preset time, and then the rolling roller is discharged from a furnace; and after the rolling roller is discharged from the furnace, mist spraying cooling is carried out to the second stage temperature within 10 min, after spraying quenching is finished, blowing cooling is carried out with the first preset wind pressure, and after temperature return is finished and the temperature does not exceed the third stage temperature, the rolling roller can be loaded into the furnaceand tempered. According to the method, after quasi-differential isothermal heat treatment is carried out on the large-size rolling roller, while quenching of the surface of the roller body is completed at a certain thickness, the roller neck and the core portion still have a certain toughness treatment effect.

The invention relates to a control system for an internal flow field of a mesh-belt kiln. A kiln tail air inlet is arranged at the tail of a low box in a cooling section of the mesh-belt kiln, a plurality of low box suction hoods are arranged on the top wall of the low box, an upper end opening of each low box suction hood is connected with a low box branch air duct, a low box air duct electric adjusting valve is arranged in each low box branch air duct, an upper end opening of each low box branch air duct is connected into a low box main air duct, the low box main air duct is connected with a suction opening of a cooling fan, an air outlet of the cooling fan is connected into a high box main air duct, the high box main air duct is positioned above the low box and extends along the height direction of a high box, a plurality of high box air outlet hoods are arranged on the top wall of the cooling fan, an upper end opening of each high box air outlet hood is connected with a high box branch air duct, a high box air duct electric adjusting valve is arranged in each high box branch air duct, and an upper end opening of each high box branch air duct is connected with the high box main air duct. By the aid of the control system for the internal flow field of the mesh-belt kiln, the temperature in the mesh-belt kiln can be more accurately controlled, and the manufacturing quality of denitration catalysts is improved.

The embodiment of the invention discloses a thermoelectric generation device comprising a heat insulation board and a heat conduction assembly mounted on the heat insulation board. Four assembling holes are formed in the upper surface of the heat insulation board; and a thermoelectric piece is installed in each of the four assembling holes. The heat conduction assembly includes a plurality of heatconducting sheets that are connected in series to form a crawler belt shape; one end of the heat conduction assembly is connected to a heat generating source and the other end is connected with heatconducting surfaces of the four thermoelectric pieces so as to transfer the heat from the heat generating source to the heat insulation board. Besides, cold conducting surfaces of the four thermoelectric pieces are connected with a water cooling device externally, so that the temperatures of the heat conducting surfaces of the four thermoelectric pieces are higher than those of the cold conductingsurfaces and thus obvious and stable temperature differences are formed between the two sides of the four thermoelectric pieces. In addition, the embodiment of the invention also provides a power storage system comprising the thermoelectric generation device, a boosting module, a storage battery and an inverter; and the boosting module carries out boosting on the voltage generated by the thermoelectric generation device and the boosted power is stored into the storage battery, so that power supply of some electric appliances at home is realized conveniently.

The invention provides an ink supply method. The ink supply method comprises the steps that a first sensor assembly obtains first temperature information and first negative pressure information of ink and transmits the first temperature information and the first negative pressure information to a controller, and a second sensor assembly obtains second temperature information and second negative pressure information of the ink and transmits the second temperature information and the second negative pressure information to the controller; a first difference value between the first temperature information and the second temperature information is calculated, the first difference value is compared with a first preset value, if the first difference value is larger than the first preset value, the controller controls a heater to reduce the power, and if the first difference value is smaller than the first preset value, the controller controls the heater to increase the power; and a second difference value between the first negative pressure information and the second negative pressure information is calculated, the second difference value is compared with a second preset value, if the second difference value is larger than the second preset value, the controller controls a circulating pump to reduce the power, and if the second difference value is smaller than the second preset value, the controller controls the circulating pump to increase the power. According to the ink supply method, the printing quality of an ink-jet printing head can be improved, and the situations of ink interruption, line pulling and the like of the ink-jet printing head are reduced.

The invention provides an efficient water and electricity co-production device which comprises a hardware box, a water and electricity co-production chamber and a purified water storage box, a water and electricity co-production module is arranged in the water and electricity co-production chamber and comprises a plurality of water and electricity co-production units, each water and electricity co-production unit comprises a thermoelectric piece, a blue film and CS/PVA aerogel, the blue film is attached to the hot end of the thermoelectric piece, and the CS/PVA aerogel is attached to the hot end of the thermoelectric piece. The cold end of the thermoelectric piece is provided with CS/PVA aerogel, the hot end of the thermoelectric piece faces upwards, the cold end of the thermoelectric piece faces downwards, the shower nozzle sprays water to the water and electricity cogeneration module from bottom to top, the blue film absorbs solar energy, then heat energy is transmitted to the CS/PVA aerogel through the thermoelectric piece, water to be evaporated is provided for the CS/PVA aerogel in a spraying water supply mode, and the water to be evaporated is evaporated through the temperature difference between the two ends of the thermoelectric piece. Purified water and electric energy can be generated simultaneously; the jet water supply mode not only can increase the output of purified water and electric energy of the water and electricity cogeneration module, but also can solve the problems of surface salt deposition, pore channel blockage and the like of the photo-thermal material.