226results about How to "Avoid temperature difference" patented technology

A fuel cell stack includes power generation cells, terminal plates, first cooling cells, and second cooling cells. The terminal plates are electrically connected to the power generation cells. The first cooling cells are interposed between the terminal plates, and a cooling liquid is supplied to the first cooling cells for cooling the power generation cells. The second cooling cells are interposed between the terminal plates. A predetermined number of power generation cells are interposed between the first cooling cell and the second cooling cell. A cooling air is supplied to the second cooling cell for cooing the power generation cells.

An interferometer and method for performing preliminary and main measurements quickly and with high precision are provided. Laser light and white light are successively introduced to the same interferometer booth. Laser light is introduced from a laser light source, and the interference fringe with a reference mirror as a reference is detected using a CCD and a personal computer. By setting the interference fringe to a preset value, the position of a work is adjusted. White light from a halogen lamp is then introduced, a corner cube moving mount is moved, interference fringe with a reference mirror as a reference is detected, and preliminary measurement of the work is performed. Next, laser light is introduced, interference fringe with a reference mirror as a reference is detected, and the main measurement of the work is performed. Because the preliminary and main measurements are performed within the same interferometer booth, the number of steps is reduced and high precision preliminary measurement can be performed.

A cooling apparatus of supplying driving power to a cooling element from a power supply unit, to drive it, includes a driving power changing part changing a power value of the driving power supplied to said cooling element from the power supply unit, by a predetermined power value at each predetermined time interval.

The present invention relates to a heat exchanger which can suitably regulate the quantity, the feeding position or the feeding order of heat exchange medium fed into tubes to adjust heat exchange performance according to cooling and heating load. The heat exchanger comprises a plurality of tubes placed at least one header, each tube having both ends fixed to the header, medium-distributing means installed at the header for feeding heat exchange medium to the specific tubes, a tank placed over the medium-distributing means, the tank having a medium-inlet pipe, a medium-outlet pipe and distribution passages for feeding heat exchange medium to specific regions of the medium-distributing means, and medium-regulating means installed at the tank and operated in response to a control signal for adjusting the feed of the heat exchange medium.

The invention relates to an intelligent welding method, system and device and a storage medium. The method comprises the steps of determining pre-marked reference points and all welding discs on a circuit board according to printing information of the circuit board to be welded, reading parameter information of each welding disc and determining relative position information between the welding discs; determining the welding discs to be welded on the circuit board, reading parameter information of the welding discs to be welded and the information about the relative positions between the welding discs to be welded and the reference points, generating welding parameter information and welding pulse information, and according to the welding parameter information and the welding pulse information, welding the circuit board; the parameter information of the welding discs to be welded on the circuit board and the information about the relative positions between the welding discs to be weldedand the reference points are obtained, the welding parameter information and the welding pulse information are generated, the circuit board is precisely welded, different soldering tin amounts are applied according to different welding discs, the manual debugging workloads at the early period are greatly reduced, work efficiency and product quality are improved, and the automation degree is high.

The invention relates to a differential current sensor for measuring the differential current ([delta] I) between an electric current (IH) flowing through a feed conductor (H) and an electric current (IR) flowing through a return conductor (R), said sensor comprising: two low-resistance current measuring resistors (RH, RL) for measuring the currents (IH, IR) in the feed conductor (H) and the return conductor (R); two measuring devices (MEH, MEL), each of which has a transducer for measuring the current drops (UH, UL) across the two current measuring resistors (RH, RL); and two voltage references (UREFH, UREFL) for calibrating the measuring devices (MEH, MEL). According to the invention, the two transducers measure in succession both the voltage drop (UH) across their respective current measuring resistor (RH) and the associated voltage references (UREFH, UREFL).

The invention relates to a method and a device for reducing metal dust in the electric wire and cable drawing process. A heating tube is mounted in front of a wire inlet of drawing equipment, two ends of the heating tube are sealed with sealing pads made of high-temperature-resistant materials, in-out ports matched with the diameter of a metal pole required to be drawn in size are reserved in the sealing pads at two ends, and the metal pole required to be drawn directly enters a first die of the drawing equipment after heated in the heating tube. The temperature in the heating tube is set to range from 300 DEG C to 350 DEG C if the metal pole is made of copper and set to range from 300 DEG C to 320 DEG C if the metal pole is made of an aluminum and aluminum alloy. With the adoption of the method and device, production of the metal dust is avoided essentially, the safety performance is improved, harm of the metal dust to the body health of a worker and serious accidents are avoided, the work efficiency is improved, the production cost is saved, the product quality is guaranteed, and the method and the device have great usage value.

The invention relates to the field of cooling mechanisms, and discloses a film cooling roller. The film cooling roller comprises a roller and a cooling pipe, wherein discharge holes are formed in both ends of the roller, the roller is rotatably connected to the cooling pipe, a helical blade is arranged on the inner wall of the roller, and a helical flow channel is formed by the helical blade between the cooling pipe and the roller; a plurality of through holes are formed in the cooling pipe, a sliding rod is connected to the interior of the cooling pipe in a sliding mode, a diversion hole is formed in the sliding rod, an outlet of the diversion hole is located in the cooling pipe and faces towards one side, in which the through hole is formed, of the cooling pipe, an inlet of the diversion hole is located outside the cooling pipe, and the sliding rod is driven by a crank-connecting rod mechanism to do a reciprocal rectilinear motion in the cooling pipe, so that the diversion hole in the sliding rod is aligned with different through holes, and cooling water is led to different positions of the helical flow channel in the roller so as to uniformly cool the roller and eliminate the temperature difference of the roller. The invention aims to provide the film cooling roller so as to guarantee the cooling efficiency of the roller and eliminate the temperature difference of the surface of the roller.

Method for production of an optical disc with a detachable module, where a standard mould is provided with an insert insertable into said standard mould. The insert restricting the internal dimensions of the mould cavity for shaping the optical disc into dimensions different from a standard optical disc. The insert comprises a line restrictor for providing a groove along at least one breaking line between the optical disc and the detachable module.

The invention relates to a novel manufacturing process of an impeller. The novel manufacturing process is characterized by comprising the following specific process steps of S1, carrying out 3D printing on an impeller prototype; S2, manufacturing a casting system with a riser to form a module; S3, manufacturing a shell; S4, dewaxing and demolding treatment; and S5, carrying out casting molding. According to the novel manufacturing process of the impeller, compared with a traditional casting or forging method, the method has great advantages that a corresponding mold is needed when the castingor forging method is used, raw materials and time are wasted, the tedious procedures are omitted through the 3D printing technology, computer related software can be helped to directly generate the impeller, and any complex impeller can be quickly printed, so that the generation period is shortened, the cost is reduced, the advantage of greatly reducing the raw material loss in the research and development process is achieved, meanwhile, the impeller produced by using the process can greatly improve the overall shock absorption and noise reduction capabilities of a pumping set, actual production reference is provided for the rapid low-pressure investment casting production process of castings, and the feasibility of the process is verified.

The invention discloses a fresh air machine and air conditioner linkage system, a method and a device for controlling the fresh air machine and air conditioner linkage system and a storage medium. Thefresh air machine and air conditioner linkage system comprises a fresh air machine, an air conditioner, a drying device, a detection device, a first temperature sensor, a second temperature sensor and a control device. High-humidity fresh air can be dried by the drying device, the outdoor humidity can be detected by the detection device, the indoor temperatures can be detected by the first temperature sensor, the outdoor temperatures can be detected by the second temperature sensor, and the detection device, the first temperature sensor and the second temperature sensor are electrically connected with the control device; the fresh air machine comprises an air outlet, an air inlet and an air channel, the air outlet is formed in an indoor environment, and the air inlet is formed in an outdoor environment and is communicated with the air outlet via the air channel. The fresh air machine and air conditioner linkage system, the method, the device and the storage medium have the advantagesthat the fresh air machine and the air conditioner can run under the control of the control device according to detection data of the detection device, the first temperature sensor and the second temperature sensor, so that outdoor fresh air can be led into the indoor environment by the fresh air machine after being dried and heated under the condition of refrigeration modes of the air conditioner, air exchange can be carried out between the outdoor fresh air and indoor air, the freshness of the indoor air can be improved, and the comfort can be enhanced for human bodies.

The invention relates to a device (1) for determining and/or monitoring the temperature (T) of a medium (5). The device (1) includes at least one first temperature sensor (13) for determining the temperature (T) of the medium (5); a reference element (8) for the in situ calibration and/or validation of the device (1), said reference element (8) at least partly consisting of a material which undergoes at least one phase transition at at least one specified phase transition temperature (Tph) within a temperature range which is relevant to the operation of the device (1), said material remainingin the solid phase during the phase transition, wherein at least one first (11) and a second (12) electrically conductive electrode is arranged on the reference element (8), said first (11) and secondelectrode (12) being electrically insulated from each other; a first connection line (9a) for contacting the first electrode (11), in particular in an electric manner, and a second connection line (9b) for contacting the second electrode (12), in particular in an electric manner. According to the invention, a third connection line (9c) is provided which consists of a material that differs at least from the material of the first (9a) or second connection line (9b). The third connection line (9c) is arranged such that the third connection line together with the first (9a) or the second (9b) connection line forms the first temperature sensor (13) in the form of a first thermoelement. The invention additionally relates to a method for the in situ calibration and/or validation of a device according to the invention.

The invention discloses a constant-temperature motherwort powdering processing device which comprises a base. A powdering tank is connected to the top part of the base through a bolt; a cover plate isconnected to the top end of the powdering tank through a bolt; a feed hopper is connected to the top end of the cover plate through a bolt; an upper grinding ring is connected to the top end of the inner part of the powdering tank through a bolt; a feed chute port is formed in the top end of the upper grinding ring; a grinding chamber with a tapered structure is arranged at the bottom end of theupper grinding ring; a grinding pattern groove is formed in the inner wall of the grinding chamber; and a water bath chamber is formed among the upper grinding ring, the powdering tank and the cover plate. According to the constant-temperature motherwort powdering processing device provided by the invention, in the powdering process, heat-preservation hot water is fed into the inner part of the water bath chamber through a water bath pipe, so that a constant-temperature constant-humidity environment in the grinding chamber is kept. According to the constant-temperature motherwort powdering processing device provided by the invention, the temperature environment of the inner part of the grinding chamber is kept by directly utilizing a water bath manner, so that the temperature variation existed in the grinding and powdering process is avoided, and the motherwort processing quality is improved.

The invention discloses an electroplating groove including a main groove body, an overflow groove, a varying temperature groove and a varying temperature pump. An overflow outlet is formed in the outer wall of the main groove body, the overflow outlet is in communication with the overflow groove, and the varying temperature groove includes an inlet, an outlet and a varying temperature pipe. The overflow groove and the main groove are both in communication with a liquid inlet of the varying temperature pump, and a liquid outlet of the varying temperature pump is in communication with the inlet.The varying temperature pipe is arranged in the varying temperature groove, the outlet is in communication with the main groove body, and the inlet and the outlet of the varying temperature pipe arecorrespondingly in communication with a varying temperature liquid pipe. The liquid is prevented from splashing out by arranging the overflow outlet and the overflow groove. In order to avoid the temperature difference between the electroplating liquid due to the deep groove, the varying temperature groove is arranged. The electroplating liquid in the overflow groove and the main groove body is sent into the varying temperature groove for heat exchange by the varying temperature pump, so that firstly, the temperature of the electroplating liquid can be adjusted, and secondly it is ensured thatthe temperature of the electroplating liquid in the main groove body is all equal through continuous circulation so as to avoid the temperature difference.

The invention discloses a solar vacuum heat-collecting tube with a fluid mixer. The solar vacuum heat-collecting tube comprises an external glass tube, a metal tube packaged in the external glass tube and a packaging device. The packaging device further comprises metal corrugated tubes and kovar alloy tubes. Vacuum cavities are formed by the external glass tube and the metal tube. A sunlight selective-absorption coating is coated on the surface of the metal tube. The fluid mixer is arranged on the metal tube. The fluid mixer plays a role in disturbing and mixing of fluid in the solar vacuum heat-collecting tube to facilitate temperature of the fluid in the solar vacuum heat-collecting tube to be uniform, so that pipeline bending damages to the heat-collecting tube caused by an overlarge temperature difference between a condensation side and a non-condensation side are prevented, and bending and cracking of the insulating glass tube are avoided. With the technology of the fluid mixer, service life of the heat-collecting tube can be prolonged, and heat-collecting efficiency of a heat collector can be improved.

The invention relates to a wear-resisting small eccentric V-ball regulating valve special for salt chemical engineering. The wear-resisting small eccentric V-ball regulating valve comprises a valve body, a packing box is machined on the valve body, a packing seal assembly, a packing gland and a packing pressing plate are sequentially arranged in the packing box and connected with the valve body in a fastening mode; a small eccentric valve ball is concentric with a transmission shaft and a driven shaft, the small eccentric valve ball is connected with the transmission shaft and the driven shaft and arranged in the valve body, an upper bush and the transmission shaft are arranged in the valve body from the top, a lower bush and the driven shaft are arranged in the valve body from the bottom, and a valve seat and a pressing ring are arranged in the valve body from the side face; a first distance adjustment pad and a second distance adjustment pad are arranged on the upper end face and the lower end face of the small eccentric valve ball; a first C-shaped seal ring is arranged in a clamping groove between the valve body and the first distance adjustment pad; a first supporting ring is arranged between the upper bush and the lower bush, and a second supporting ring is arranged between the first C-shaped seal ring and a second C-shaped seal ring. According to the wear-resisting small eccentric V-ball regulating valve, blocking of a flow channel of the valve body can be effectively prevented, corrosion of a cavity by crystals can be effectively prevented; the adjustment accuracy of the valve can be improved; scouring and corrosion of media on the valve body and components in the valve can be reduced; particle media can be prevented from entering valve shaft gaps, the adjustment accuracy of the valve can be greatly improved, and the service life of the valve can be greatly prolonged.

The invention belongs to the field of tea processing, and particularly discloses a tea leaf enzyme deactivation device. The device comprises a frame; an enzyme deactivation barrel is fixed on the frame; first air bags and second air bags are staggered on the inner wall of the enzyme deactivation barrel; the upper part of each first air bag is provided with a first projection; a first spring is fixedly arranged between the two inner side walls at each first projection and in each first air bag; each first projection is provided with a first magnetic block; the inner wall of the upper end of each first air bag is provided with a first air inlet hole; the outer wall of the upper end of each first air bag is provided with a first air outlet hole; the outer wall of the lower end of each secondair bag is provided with a second air inlet hole; the outer wall of the lower end of each second air bag is provided with a second air outlet hole; a stirring shaft is rotatably connected onto the frame; the stirring shaft is provided with some supporting rods which are close to the first projections and the second projections and are uniformly distributed in circumferential direction; and one ends, far from the stirring shaft, of the supporting rods are fixedly connected to an electromagnet for repelling first magnetic blocks and second magnetic blocks. The adopted scheme of the invention solves the problem that the tea leaves are easy to heap up during the enzyme deactivation process.

The present invention relates to a multiblade diffusion fan assembly for attachment to a ceiling cassette air conditioner, which is to be attached to an indoor unit of the ceiling cassette air conditioner, the multiblade diffusion fan assembly being driven without power by receiving a discharge air current, generating an air current in an outwardly radial direction by introducing discharged air in the direction of a hub shaft, and inducing the discharge air current to be diffused widely in an indoor space. The purpose of the present invention is to overcome a limitation of the air current discharge structure of an indoor unit of a conventional ceiling cassette air conditioner. The present invention forms a multiblade diffusion fan for attachment to an indoor unit of a ceiling cassette air conditioner, which can be attached without changing the structure of the indoor unit of the ceiling cassette air conditioner, is driven without power by receiving a discharge air current, discharged from a discharge port of the indoor unit of the air conditioner, and generates an air current in an outwardly radial direction by introducing discharged air in the direction of a hub shaft and induces the discharge air current to be diffused widely in an indoor space.