163results about How to "Reduce cooling costs" patented technology

The invention relates to the technical field of refrigeration control, in particular to a high-low temperature box refrigeration power closed-loop control method and device. The method comprises the following steps: acquiring multi-dimensional monitoring parameters of a high-low temperature box according to a multi-source sensor; performing three-dimensional temperature distribution analysis on the multi-dimensional monitoring parameters of the high and low temperature box, performing three-dimensional modeling on the environment in the box, and constructing a three-dimensional parameter feature model; performing dynamic refrigeration airflow dynamic analysis on the three-dimensional parameter characteristic model according to a high-low temperature box, performing three-dimensional track distribution rendering, and constructing a refrigeration flow digital twinborn model; performing multi-stage temperature change trend calculation on the refrigeration flow digital twin model, and performing dynamic refrigeration demand calculation to obtain refrigeration demand characteristics of each stage; and performing refrigeration flow property simulation based on the refrigeration demand characteristics of each stage, performing compressor refrigeration power demand planning, and constructing a dynamic power demand planning strategy. According to the invention, efficient and accurate refrigeration closed-loop control is realized.

The explosion-proof cooling device for the underground coal mine comprises a frame, an air-cooled condenser, a compressor unit, a shell-and-tube evaporator and a base are installed in the frame, and a programmable control box is installed at the left end of the frame; the air-cooled condenser is used for heat dissipation and cooling of coolant compressed gas; the compressor unit is used for compressing a gas refrigerant and comprises an oil separator, a double-screw compressor, a first motor, a double-loop reversible vacuum electromagnetic starter, a liquid storage tank, a first drying filter and a second drying filter; the shell-and-tube evaporator is used for heat exchange between high-temperature nitrogen and a low-temperature refrigerant. According to the cooling device, a refrigerant used when the cooling device works can be recycled, the investment of resources and cost of the part is reduced, the refrigeration cost is saved, nitrogen in the device can rapidly and continuously release low-temperature nitrogen, the air temperature in a large range of a mining area is efficiently achieved, air is inerted, the oxidation spontaneous combustion rate of coal is reduced, and gas explosion is restrained; the mining area safety is improved.

The present application relates to the field of heat dissipation units, and in particular to a power converter and energy storage system with an air-liquid composite heat dissipation unit. The power converter includes a housing, a power converter and an air-liquid composite heat dissipation unit. Among them, the power conversion circuit includes a circuit board and a power tube, the circuit board and the upper cover plate of the housing are stacked and arranged, and there is a gap for air circulation between the top of the circuit board and the upper cover plate of the housing, and the power tube is located between the bottom of the circuit board and the lower cover plate of the housing. The air-liquid composite heat dissipation unit includes a fan and a cold plate, the cold plate is fitted with the side of the power tube, the fan is arranged between the bottom of the circuit board and the lower cover plate of the housing, and there is a gap for air circulation between the fan and the side plate of the housing. The power converter with an air-liquid composite heat dissipation unit disclosed in the present application dissipates heat for power tubes with high heat dissipation requirements through a cold plate, and dissipates heat for air in the equipment through a fan, which helps to improve heat dissipation efficiency and reduce heat dissipation costs.

The invention discloses a biological bacterial fertilizer preparation pelletizer, and relates to the technical field of biological bacterial fertilizer pelletizers, the biological bacterial fertilizer preparation pelletizer comprises a machine body, one side of the machine body is provided with heat dissipation holes at equal intervals, the biological bacterial fertilizer preparation pelletizer further comprises a cleaning protection mechanism and an auxiliary heat dissipation mechanism, the auxiliary heat dissipation mechanism is driven by the cleaning protection mechanism, and the cleaning protection mechanism is used for cleaning the heat dissipation holes. The auxiliary heat dissipation mechanism is used for assisting heat dissipation of the machine body, through insertion of cleaning balls and air blown out of air holes of the cleaning balls, impurities on the outer sides of heat dissipation hole bodies can be effectively cleaned, meanwhile, impurities in the heat dissipation hole bodies and impurities entering the heat dissipation hole bodies under the action of external force can be cleaned, and the phenomenon that when a worker wipes the machine body, the heat dissipation hole bodies are damaged is avoided. The problem that dust particles are extruded by an external wiping tool, and generated extrusion force pushes part of impurities to penetrate through the heat dissipation hole bodies to enter the machine body is solved, the cleaning effect of the heat dissipation hole bodies is improved, the heat dissipation stability of the heat dissipation hole bodies is guaranteed, and then the stability of biological bacterial fertilizer granulation is improved.

The invention discloses a phase change heat transfer motor stator heat dissipation structure and a design method, and belongs to the technical field of motor heat management, the structure comprises a stator iron core, a copper wire winding and a flattening type phase change heat transfer device, the copper wire winding is arranged on the inner side of the stator iron core, and the flattening type phase change heat transfer device is arranged on the outer side of the stator iron core; the flattening type phase change heat transfer device is arranged in a groove, in contact with the stator core, in the radial interior of the copper wire winding. The invention further discloses a design method of the heat dissipation structure. By adopting the heat dissipation structure and the design method, the thermal control technology of the motor stator winding is researched and developed based on the phase change heat transfer device, and the purposes of greatly reducing the peak temperature of the motor, enhancing the temperature uniformity of the motor and realizing high-overload-multiple safe operation are achieved.

The utility model relates to the technical field of illumination, and discloses a light emitting piece which is a rotational symmetric body and comprises a first end part, a first light reflecting part, a second end part, a second light reflecting part and a third end part, the first end part is provided with a light outlet; the first reflecting part is formed by extending the first end part upwards in an arc-shaped manner in the direction far away from the light outlet, and is provided with a reflecting surface; the second end part is the top end of the light emitting part; the second end part obliquely extends downwards in the direction close to the light outlet to form the second light reflecting part, and the second light reflecting part is provided with a polarization surface; the third end part is arranged at the other end of the second light reflecting part; and the first end part, the first light reflecting part, the second end part, the second light reflecting part and the third end part jointly encircle to form a light emitting cavity. The light entering the light outlet cavity is emitted from the light outlet after being collimated and reflected by the first light reflecting part and deflected and reflected by the second light reflecting part, so that the direct light is avoided, the glare condition is effectively controlled, and the light outlet effect is good. The utility model further provides a light emitting structure comprising the light emitting piece and a lamp.

The invention relates to the technical field of additive manufacturing, in particular to an electron beam additive manufacturing cooling method and electron beam additive manufacturing equipment. The electron beam additive manufacturing cooling method comprises the following steps that a vacuum forming chamber is filled with mixed cooling gas, the mixed cooling gas comprises helium and balance gas, and the balance gas comprises argon and / or neon; after the mixed cooling gas fully exchanges heat in the vacuum forming chamber, the temperature in the vacuum forming chamber is detected and obtained; when the obtained temperature in the vacuum forming chamber is higher than a preset temperature; and if yes, the mixed cooling gas filled in the vacuum forming chamber is pumped out, and the mixed cooling gas is filled in the vacuum forming chamber again. According to the electron beam additive manufacturing cooling method provided by the invention, the mixed cooling gas is circularly filled into the vacuum forming chamber, so that the cooling efficiency of the vacuum forming chamber is effectively improved. In addition, mixed cooling gas is filled into the vacuum forming chamber, so that the cooling cost is reduced, and the cooling efficiency is also ensured.

The invention discloses a flame detection probe cooling system, method and device, electronic equipment and a storage medium, and relates to the technical field of flame detection probe cooling, and the main technical scheme comprises a cooling module, a control module and a temperature monitoring module; the cooling module is connected with the control module, the control module is connected with the temperature monitoring module, and the temperature monitoring module is placed around a flame detection probe; the cooling module is used for generating cooling air so as to cool the flame detection probe by using the cooling air; the temperature monitoring module is used for monitoring the temperature of the flame detection probe and transmitting the temperature to the control module; and the control module adjusts the air volume of the cooling air generated by the cooling module based on the temperature. Compared with the prior art, according to the embodiment of the invention, the air volume of the cooling air generated by the cooling module in the flame detection probe cooling system is adjusted according to the temperature change of the flame detection probe, so that the cooling cost of the flame detection probe is reduced.

The present invention discloses a flow channel separation type liquid cooling plate, which relates to the technical field of liquid cooling plates, and comprises a cooling plate body, and also comprises: a uniform heat dissipation mechanism and a separate isolation mechanism, wherein the uniform heat dissipation mechanism is located at the top of the cooling plate body, and the separate isolation mechanism is located at the corner of the cooling plate body, and the uniform heat dissipation mechanism is used to make the flow path of the cooling liquid the same, and to dismantle part of the pipeline for replacement after a failure of the device occurs, and through the setting of the uniform heat dissipation mechanism, the flow path of the cooling liquid in the cooling plate body is designed as a plurality of independent flow channel bodies to prevent the mixing or leakage of the cooling liquid, and at the same time, the multi-flow channel design can increase the contact area between the cooling liquid and the heat source, and each flow channel works independently, which is helpful for the heat distribution on the heating element to be absorbed and dissipated more uniformly, and the heat dissipation efficiency can be improved, and through the gradual bending treatment of the flow channel body, it is ensured that the total path of each flow channel is the same, thereby improving the heat exchange effect.

The present invention discloses an energy-saving and cooling system for a communication room and an application method thereof. The energy-saving and cooling system for a communication room includes a refrigerant storage container, a refrigerant channel, an air supply channel, a heat exchanger and a control unit. The refrigerant storage container forms a refrigerant circulation loop with the refrigerant channel through two connecting ports. The refrigerant channel is connected in series with a circulating pump, a refrigerator and a heat exchange channel of a heat exchanger. Another heat exchange channel of the heat exchanger is connected in series with the air supply channel. The control ends of the circulating pump and the refrigerator are respectively connected to the control unit. The application method is to control the working mode of the energy-saving and cooling system for the communication room, including a refrigerant cold storage mode and a fresh air cooling mode. The present invention can utilize refrigerants to realize energy scheduling of natural temperature differences and tiered electricity prices, and realize a cold storage effect similar to battery energy storage. The use of cold storage can realize energy-saving and cooling of the communication room through fresh air cooling, which can reduce the cooling cost of the communication room.

The invention relates to a waste heat recovery system and method for combined operation of a computing power center and a thermal power plant, a heat pump unit is arranged between the computing power center of the thermal power plant and a low-pressure heating system, the computing power center is provided with a water cooling circulation device, and the high-temperature water output end of the water cooling circulation device is communicated with the waste heat absorption end of the heat pump unit through a heat preservation pipe; the low-temperature output end of the heat pump unit is communicated with the low-temperature water filling end of the water-cooling circulating device through a cooling water pipe, the recovery pipeline is communicated with the low-temperature heating end of the heat pump unit through a branch recovery pipeline, and the high-temperature output end of the heat pump unit is communicated with the liquid inlet end of the low-pressure heater system through a waste heat utilization pipeline; the water-cooling circulating device arranged in the computing power center is used for recycling heat during operation of each computing unit, and a closed circulating system is formed, so that waste heat output can be efficiently recycled while the computing power center is cooled.

The embodiment of the invention discloses a constant-voltage transmitting circuit and a laser radar. The constant-voltage transmitting circuit comprises a constant-voltage power adjustable module and a constant-voltage transmitting module, the constant-voltage power adjustable module comprises an energy storage element, the input end of the constant-voltage power adjustable module is used for being connected with a constant-voltage emission power supply outputting constant voltage so as to charge the energy storage element through the constant voltage, and the constant-voltage power adjustable module can adjust the energy stored by the energy storage element; the constant-voltage transmitting module comprises a laser, the laser is connected with the energy storage element, the laser is used for transmitting laser when the energy storage element releases energy, and different energies stored in the energy storage element correspond to different laser transmitting powers. The constant-voltage transmitting circuit can drive the laser to emit light through the constant-voltage power supply outputting the constant high voltage, energy loss is low, laser of different powers can be emitted based on the constant high voltage, and the overall use reliability of the constant-voltage transmitting circuit is guaranteed.

This invention relates to the field of lithium battery heat dissipation technology, specifically disclosing a heat dissipation device for lithium battery packs, comprising a support plate and a top plate. The support plate and the top plate are arranged longitudinally symmetrically in parallel. Multiple sets of coaxially corresponding mounting holes 1 and 2 are arrayed along the length direction on their opposite end faces. Hollow sealing rings are fixedly installed on the inner walls of both mounting holes 1 and 2. Two symmetrically arranged side plates 1 and 2 are fixedly connected to the two side edges of the support plate and the top plate. The support plate, the top plate, the side plates 1 and 2 together form a cavity structure for accommodating the lithium battery pack and heat dissipation components. Several fan support frames are arrayed along the length direction of the side plates 1 facing the inner side of the cavity, and each of the fan support frames is equipped with a corresponding heat dissipation fan. The air outlet direction of the heat dissipation fan faces the inner cavity. This invention addresses the problem of the single heat dissipation function of lithium batteries.

The invention discloses an electronic power soft starter, and relates to the technical field of power equipment soft start, the electronic power soft starter comprises a silicon controlled rectifier heat dissipation system, a silicon controlled rectifier trigger system and a soft start control system, the silicon controlled rectifier heat dissipation system adopts a double heat dissipation mode of oil immersion and water cooling, and three-phase six silicon controlled rectifier elements are immersed in insulating oil; the bottom of the oil box is placed in the water box; according to the silicon controlled rectifier trigger system, two silicon controlled rectifiers in each phase are connected in anti-parallel and are connected with relay coils through buttons, and contacts of relays are connected with control electrodes of the silicon controlled rectifiers. According to the electronic type electric power soft starter, a contactless spark design is adopted, sparks generated by a traditional mechanical contact type starter are effectively avoided, and the safety production level is improved; and meanwhile, the short-circuit instantaneous breaking protection circuit breaker is adopted, so that the safety protection performance of the equipment is further enhanced. The heat dissipation mode is innovative, oil immersion and water cooling are combined, the heat dissipation cost is reduced, and hot water can be recycled.

This invention relates to the field of charging technology and discloses a power distribution circuit and electronic device. The power distribution circuit includes a power conversion circuit, a power sharing control circuit, and a power output circuit. The power conversion circuit includes at least two power conversion modules, and the power output circuit includes at least one power output module. When an external device is detected connected to a power output module, the power sharing control circuit obtains the demand parameters corresponding to the connected external device. Based on the demand parameters and the shared output power provided by each power conversion module, the power output power of the power output module is controlled to be supplied to the external device. The demand parameters include a communication protocol and the required power. The sum of the shared output power of all power conversion modules equals the required power of the external device. Therefore, implementing this invention enables dynamic adjustment of output power, improving the flexibility and reliability of output power adjustment while reducing circuit development costs.

The utility model belongs to the technical field of building equipment, and particularly relates to an assembly type green building construction wall which comprises a construction wall body, and installation assemblies are arranged on the two sides of the construction wall body. The mounting assembly comprises a mounting block, and the mounting block is fixedly connected to one side of the construction wall body. According to the utility model, the mounting assembly is arranged, and the mounting block is matched with the mounting groove, so that during mounting, the mounting block of one construction wall body is aligned with the mounting groove of the other construction wall body to be inserted, and then the screw rod, the gasket and the nut are used for fixing. Compared with a complex installation structure of a traditional fabricated construction wall, the design is simpler to operate, common constructors can master the installation method through simple training, dependence on professional technicians is greatly reduced, meanwhile, installation time and labor cost are reduced, construction efficiency is improved, and the construction cost is reduced. And the modern fast-paced building construction requirements can be better met.

The invention relates to the technical field of wire and cable production, in particular to a wire and cable processing extruder which comprises an extruder body, extrusion screw tubes for melting and extruding materials are arranged at the top of the extruder body, and the discharge ends of the extrusion screw tubes are detachably connected with die heads for processing outer cladding layers of wire and cables. The feeding end of the die head is provided with a connecting disc and is connected with the discharge end of the extrusion solenoid through the connecting disc; an appropriate number of extruders are selected according to the number of outer cladding layers of a wire cable, die heads at the discharge ends of the extruders are connected in series, the die heads in each group are connected in series in a butt joint mode, each group of extruders extrude corresponding outer cladding materials, and cladding, cooling and shaping treatment of the materials in each layer are sequentially completed in the conveying process of the wire. And on the premise of not influencing the production of the multi-clad cable, the configuration of the die head is optimized, the structure is simple, the use and maintenance cost is reduced, and meanwhile, the extrusion units can be unfolded and arranged.

The invention discloses an efficient heat dissipation and cooling system for a liquid cooling charging pile group, and relates to the technical field of liquid cooling charging piles, the efficient heat dissipation and cooling system comprises a liquid cooling module, a heat dissipation module and a temperature control module, the liquid cooling module comprises a liquid cooling plate, a water pump, a water tank and a cooling box, and a cooling liquid circulating pipeline is arranged in the liquid cooling plate; the input end of the cooling liquid circulating pipeline is fixedly connected with the output end of the water pump, the output end of the cooling liquid circulating pipeline is fixedly connected with the input end of the water tank, the input end of the water pump is fixedly connected with the output end of the water tank, the bottom of the water tank is fixedly connected with the cooling box, and the heat dissipation module comprises a liquid nitrogen cooling module and a heat conduction plate. The heat conduction plate is located on the outer wall of the cooling box, and the liquid nitrogen cooling module is located on the outer side of the heat conduction plate. Through mutual cooperation of the liquid cooling module and the heat dissipation module, rapid cooling and heat dissipation of cooling water of the liquid cooling charging pile are achieved, so that the low-temperature state of the cooling liquid every time is guaranteed, and normal heat dissipation is guaranteed.

The invention discloses cold shock induced autolytic saccharomyces cerevisiae as well as a construction method and application thereof. The cold shock induced autolytic saccharomyces cerevisiae expresses a gene for coding and decomposing a cell wall component, and the gene for coding and decomposing the cell wall component comprises a coding gene bgl2 of incision beta-1, 3-glucanase, a coding gene cts1 of chitinase and a coding gene manA of beta-mannase; the promoter for coding the gene for decomposing the cell wall component is a cold shock inducible promoter. According to the prepared cold shock induced autolysis saccharomyces cerevisiae, engineering bacteria can be induced to generate obvious autolysis through one-time cold shock, meanwhile, reaction products do not need to be sterilized at high temperature, and the browning phenomenon caused by the Maillard reaction of polysaccharide and protein in filtrate under the high-temperature condition is avoided.

The invention relates to an energy storage ceramic material prepared from shells, a method and green refrigeration equipment. The energy storage ceramic material comprises a ceramic skeleton containing honeycomb holes and fused salt packaged in part of the honeycomb holes of the ceramic skeleton through a packaging agent. Wherein the raw materials of the ceramic skeleton comprise a main material and a binder accounting for 2-6% of the mass of the main material; the main materials comprise the following components in percentage by mass: 68-80% of a mixture, 2-6% of a lubricant and 14-30% of water; the mixture comprises shells, spoil, sludge and diatomite. The obtained energy storage ceramic material is high in unit volume heat storage capacity and large in molten salt phase change latent heat, and a long-time constant-temperature heat source can be provided; fused salt is uniformly packaged in only part of honeycomb holes, the rest of honeycomb holes are still through holes, heat convection and heat release are facilitated, the heat exchange efficiency is improved, and the energy storage ceramic material is of a honeycomb structure, can stably work for a long time, is long in service life and is low in refrigeration cost when being used in green refrigeration equipment.

The invention relates to the field of battery heat dissipation, in particular to a high-specific-energy battery with a circulating heat dissipation shell, which comprises a lower shell, an upper shell is arranged above the lower shell, and the upper shell and the lower shell form a closed space. The air cooling radiator is used for heat dissipation when the heat of the battery pack is low, and when the temperature is high, the water inlet pipe conveys a water source into the water tanks, the water source flows in the water tanks through the connecting pipes and is finally conveyed out through the water outlet pipe, so that circulation of the water source is formed, and the heat of the battery pack is transferred to the heat dissipation frame in the circulation process; heat is transferred to the surface of the water tank through the heat dissipation frame, so that an internal water source takes away the heat, the heat dissipation effect is achieved, a valley-peak staggered heat dissipation mode is adopted, certain heat dissipation cost can be saved, the heat dissipation structure is simple, modular design is adopted, and therefore the cost and complexity of later maintenance are reduced, and the heat dissipation effect is good. Therefore, the problem that the heat dissipation cost of the battery is relatively high is solved.

This invention relates to the field of drinking water equipment control technology, specifically disclosing a refrigeration system and a drinking water device. The refrigeration system includes: a temperature sensor mounted on the base of the drinking water device for detecting the temperature of the environment in which the drinking water device is located; a refrigeration unit including a compressor mounted on the base; and a control device connected to both the temperature sensor and the compressor. The control device controls the compressor to perform an ice-making operation at a first operating frequency based on the temperature information. After the ice-making operation is completed, if no cold water or ice-retrieving command is received within a first preset time period, the control device controls the compressor to operate at a second operating frequency. The second operating frequency is lower than the first operating frequency to achieve energy saving, reduce the refrigeration power consumption and cost of the drinking water device, and improve the user experience.

The present invention relates to the field of motors, and in particular to a three-phase asynchronous motor with a self-dust removal and heat dissipation structure, comprising a mounting seat, a controller, a fan, a cleaning mechanism and a lubricating mechanism. A casing is fixedly arranged on the top of the mounting seat, a casing is fixedly arranged on one end of the casing by a plurality of bolts, a plurality of air inlet holes are opened on the outer wall of the casing, the cleaning mechanism comprises a cleaning brush and a driving assembly, the lubricating mechanism comprises an oil tank, a transmission assembly, a rotating assembly, an extrusion assembly and two atomizing nozzles, the extrusion assembly is inserted into an oil receiving pipe, the rotating assembly is arranged between the transmission assembly and the extrusion assembly, the two atomizing nozzles are symmetrically arranged inside the casing, and the driving assembly is electrically connected to the controller. The three-phase asynchronous motor with a self-dust removal and heat dissipation structure of the present invention can make the cleaning mechanism and the lubricating mechanism operate synchronously to realize linkage, that is, while cleaning, lubricating oil is sprayed on the machine shaft and two bearings synchronously to improve lubricity and reduce wear.

The invention relates to the technical field of photovoltaic product processing, and discloses a discharging and cooling device of a laminating machine for photovoltaic cell production. A hollow sponge hanging pad capable of storing water and evaporating in real time is arranged below an air inlet of an axial flow fan, water is pumped through a water pump set and conveyed into a water injection transverse pipe frame and a water seepage longitudinal pipe frame, and then the water is evenly and slowly released into the hollow sponge hanging pad through seepage thin pipes; the hollow sponge hanging pad can be continuously filled with water in real time while continuously evaporating, so that the hollow sponge hanging pad continuously evaporates to absorb heat and release cold, the temperature of airflow extracted by the axial flow fan from the lower part is stably lower than the environment temperature, and photovoltaic cells which are arranged on the upper part and circulate on the synchronous belt can receive low-temperature air cooling heat dissipation; the purposes of reducing the air cooling temperature and improving the air cooling effect are achieved, the arranged equipment is simple, the power consumption is low, the effects of reducing the power consumption and reducing the cooling cost are achieved, and efficient heat dissipation of the battery assembly discharged by the laminating machine is greatly facilitated.

The invention provides a domain controller and a vehicle, the domain controller comprises a bottom shell and a top cover, a first heating element is arranged in an inner cavity of the bottom shell, the top cover is connected to the bottom shell, and a heat dissipation air channel with an air inlet and an air outlet is formed between the top cover and the bottom shell; any one of the air inlet and the air outlet is provided with a fan assembly, the fan assembly is connected to the bottom shell, a heat dissipation module and a first fin set are arranged in the heat dissipation air channel, and the heat dissipation module and the first fin set are distributed in the axial direction of the fan assembly at intervals; the heat dissipation module is connected to the bottom shell and is used for conducting heat generated by the first heating element and dissipating the heat; the first fin set is connected to the bottom shell and comprises a plurality of first fins distributed at intervals, and the extending direction of each first fin is consistent with the axial direction of the fan assembly. According to the domain controller, the heat dissipation cost is relatively low, and the installation steps of the domain controller on the whole vehicle are relatively simplified.

The present invention provides a flat-panel CT machine, including a ray emitter and a flat-panel detector, which adopts 360° scanning or 180° scanning. The flat-panel detector uses a larger length and width than the flat-panel detector used for DSA, can cover a single part of the human body, and no longer needs spiral scanning; the scanning time is greatly reduced, which can effectively reduce motion artifacts; the radiation dose of the patient is greatly reduced; the spatial resolution and the number of longitudinal scanning layers are greatly improved, and it is a gapless scanning. The pulse control technology of X-ray emission is adopted to make the data obtained by the CT machine complete and without missing, and the image is clearer. Through pulse control technology or 180° scanning mode, the scanning frequency is reduced by half; pulse control technology can reduce the requirement for the mobility of the detector thin film transistor by about 10 times; by redesigning the number of detector array elements to further reduce the frequency, and control the inverter frequency of the ray emitter within an achievable range, the CT machine has the possibility of practical application.

The invention relates to an impedance matching circuit, a related circuit and a circuit system. The impedance matching circuit is connected between a signal source circuit and a surface acoustic wave chip, and comprises an MCU controller, a temperature measurement circuit and an impedance matching network, the impedance matching network comprises a matching inductor combination and a matching capacitor combination, the matching inductor combination comprises a plurality of matching inductors which are connected in series and have different inductance values, and an inductor switch which is connected in parallel to each matching inductor; the matching inductor combination comprises a plurality of matching capacitors which are connected in parallel and have different capacitance values, and a capacitor switch which is connected in series with each matching capacitor; the temperature measuring circuit is connected with the MCU controller and is used for measuring temperature data of the surface acoustic wave chip in real time and sending the temperature data to the MCU controller; and the MCU controller is connected with each inductance switch and each capacitance switch and is used for outputting a control signal according to the received temperature data so as to control the corresponding inductance switches and capacitance switches to be switched off or switched on.

The invention relates to the field of laser processing, and discloses a gain optical fiber with low numerical aperture and stable absorptivity, an optical fiber laser and laser processing equipment, the gain optical fiber comprises a gain fiber core, a step layer and a cladding, the refractive index of the gain fiber core, the refractive index of the step layer and the refractive index of the cladding are sequentially reduced, the gain optical fiber has stable pump light absorptivity at the wave band of 900-1000 nm, and the step layer and the gain fiber core form a low numerical aperture structure. The gain optical fiber with low numerical aperture and stable absorptivity has high absorptivity for pump light in a wide wavelength range, the influence of the fluctuation of the central wavelength of the pump light on the light output power of the gain optical fiber is reduced, and the stability of the power output by the gain optical fiber is improved; the step layer is arranged between the cladding and the gain fiber core, so that the numerical aperture of the gain fiber core is reduced, the laser output with high beam quality is maintained, the unstable power threshold of a transverse mode is increased, and the optical coupling efficiency and the stability of the transverse mode output by the gain fiber are improved.

The utility model relates to the technical field of production and machining equipment, and provides automobile part machining equipment which comprises a shell, a fixing block is fixedly connected to the outer surface of the shell, a first supporting plate is fixedly connected to the outer surface of the shell, a motor is fixedly connected to the top of the first supporting plate, and a first rotating shaft is arranged on the motor through an output shaft; two first belt wheels are fixedly mounted on the outer surface of the first rotating shaft, the outer surfaces of the two first belt wheels are in transmission connection with two transmission belts, the inner surfaces of the multiple transmission belts are in transmission connection with second belt wheels, and second rotating shafts are fixedly mounted on the inner surfaces of the multiple second belt wheels; and eccentric blocks are fixedly mounted on the outer surfaces of the multiple second rotating shafts correspondingly, and connecting rods are movably embedded in the outer surfaces of the multiple eccentric blocks correspondingly, so that the problem that cooling is not uniform due to the fact that the amount of water making contact with all positions of the rod-shaped materials is not uniform is solved, the product quality of the rod-shaped materials is guaranteed, meanwhile, the utilization rate of water resources is increased, and the cooling cost is reduced.

The utility model discloses a capacitor pool heat dissipation structure and a converter, the capacitor pool heat dissipation structure comprises a capacitor pool group arranged in a converter cabinet body, and the capacitor pool group comprises a capacitor pool shell and a capacitor; a heat dissipation air duct is arranged in the capacitor pool shell, and the heat dissipation air duct is isolated from the inner cavity of the converter cabinet body; the capacitor shell of the capacitor is at least partially located in the heat dissipation air channel, the capacitor pool shell is further provided with a shell air inlet and a shell air outlet which are both communicated with the heat dissipation air channel, and the shell air inlet and the shell air outlet are both used for being communicated with the external environment. According to the capacitor pool heat dissipation structure, air cooling heat dissipation of the capacitor is realized, and the heat dissipation cost of the capacitor is reduced; and the air flowing through the heat dissipation air channel is prevented from influencing devices in the inner cavity of the converter cabinet body, so that the protection performance of the converter is improved, and the protection cost of the converter is also reduced. Therefore, the heat dissipation structure of the capacitor pool meets the requirements of the converter on low cost and high protection.