40results about How to "Guaranteed heat transfer efficiency" patented technology

A highly integrated wide- and narrow-band RF transceiver module includes a housing made of aluminum alloy with a flat structure. An upper cavity is formed with an opening on the housing's surface, and a lower cavity is formed with an opening on the lower surface of the housing. An upper control card and an upper partition are located at the bottom of the upper cavity, with the upper partition fixed to the bottom of the upper cavity by screws. Multiple compartments are formed on the upper partition. An upper cover is fixed to the upper end of the upper cavity. A lower control card and a lower partition are located at the bottom of the lower cavity, with the lower partition located below the lower control card and fixed to the bottom of the lower cavity. Multiple holes are formed on the lower partition, with electronic components on the lower control card located within each hole. A lower cover is fixed to the lower end of the lower cavity. This invention's dual-cavity design evenly distributes the gain in the RF link across both sides, achieving physical isolation and increasing electromagnetic shielding. Simultaneously, power amplifiers and RF front-end circuits arranged on the same side are physically isolated through the upper and lower partitions, ensuring electromagnetic shielding effectiveness.

The utility model relates to the technical field of civil air defense engineering, in particular to a civil air defense filtering absorber with a ventilation conversion function, which comprises a shell, a cooling cavity is arranged in the shell, cooling water is stored in the cooling cavity, a water replenishing pipe is arranged on the outer side of the shell, and an air cooling mechanism is arranged in the shell. The air cooling mechanism comprises an air guiding pipe fixedly connected to the top end of the shell, a plurality of sets of cooling coiled pipes are arranged on the two sides of the cooling cavity, the bottom end of the shell is fixedly connected with a coolant storage box, the coolant storage box is communicated with the cooling coiled pipes, and a circulating pump is installed at the bottom end of the coolant storage box. The shell is matched with the air cooling mechanism, filtered clean air is guided into the snakelike passing pipe through the air guiding pipe, heat exchange is conducted between the snakelike passing pipe and cooling water in the cooling cavity, and therefore the heat exchange efficiency of the cooling water in the cooling cavity is guaranteed, and damage caused by high-temperature air is avoided.

The utility model belongs to the technical field of ethylene cracking equipment, and discloses a quenching heat exchanger. The quenching heat exchanger comprises a barrel, an upper tube plate, a lower tube plate, an inlet seal head, an outlet seal head and a plurality of heat exchange tubes, the upper tube plate and the lower tube plate are connected to the two ends of the barrel respectively in the vertical direction and jointly define a shell pass cavity, cooling water circulates in the shell pass cavity, the inlet end socket is connected to the end, away from the barrel, of the lower tube plate, the outlet end socket is connected to the end, away from the barrel, of the upper tube plate, and the heat exchange tubes are evenly distributed in the barrel. One end of the heat exchange tube penetrates through the lower tube plate and is communicated with the inlet seal head, and the other end of the heat exchange tube penetrates through the upper tube plate and is communicated with the outlet seal head, so that high-temperature cracking gas circulates in a tube pass chamber in the heat exchange tube; the upper tube plate is provided with an exhaust mechanism, and the exhaust mechanism is used for exhausting water vapor accumulated on the upper tube plate; the lower tube plate is provided with a sewage discharging mechanism which is used for discharging dirt accumulated on the lower tube plate. The quenching heat exchanger can discharge stains and water vapor, and the reliability of the quenching heat exchanger is improved.

The invention provides a vertical power module heat dissipation device and method and an aircraft, and belongs to the technical field of aircrafts, and the heat dissipation device comprises a heat exchanger fairing and a heat exchanger; the heat exchanger fairing is in a streamline shape with two sharp ends and a wide middle, the two ends of the heat exchanger fairing are fixedly arranged on the power arm body, and heat exchanger heat dissipation openings are formed in the top of the heat exchanger fairing and located below the forward-rotating propeller and the reverse-rotating propeller. Driving motor modules of the forward-rotating propellers and the reverse-rotating propellers are located in the heat exchanger fairing, and heat exchanger heat dissipation channels are formed between the inner side wall of the heat exchanger fairing and the two sides of the top of the power arm body; the heat exchanger is arranged in the heat exchanger fairing, and cooling fins of the heat exchanger are arranged at heat dissipation openings of the heat exchanger. And a hot liquid inlet and a cold liquid outlet of the heat exchanger are respectively connected with a cooling liquid outlet pipe and a cooling liquid inlet pipe of the driving motor module. The problem that in the prior art, a heat dissipation structure is arranged outside a power arm, and flight resistance is caused to cruise flight of an aircraft can be solved.

This invention provides a fan assembly and a ducted air conditioner. The fan assembly includes a fan blade side cover; at least two blades; and a blade drive device. The fan assembly and ducted air conditioner provided by this invention utilize the blade drive device to move the blades between a first orientation and a second orientation, ensuring airflow under different air outlet conditions. This guarantees the heat exchange efficiency of the ducted air conditioner, effectively overcoming the problem in existing ducted air conditioners where heat exchange efficiency is high in cooling mode but low in heating mode. This allows the ducted air conditioner to achieve waterfall-style cooling and rapid heating, improving the user experience.

The utility model relates to fuel cell heat exchange technical field discloses fuel cell cooling water loop temperature equalization type spiral heat exchange pipe, including battery case, the right side fixed coupling of battery case has the supporting plate, the inboard fixed coupling of battery case has the polar plate, the inboard of polar plate is provided with heat pipe mechanism, the top of battery case is provided with temperature measuring mechanism, the top of supporting plate is provided with flow channel control mechanism, flow channel control mechanism is used for the flow rate of different heat pipe flow channel of selection adjustment, the top right end rear side of battery case is provided with filter mechanism, filter mechanism is used for filtering the impurity in coolant. In the utility model, the control of each branch flow channel coolant flow, according to temperature balance each flow channel flow, improve the temperature difference of different area of battery, effectively reduce the phenomenon that some area temperature is too high, effectively keep fuel cell cooling water loop overall temperature equalization.

The present application relates to the technical field of noble metal production, and discloses a drying method for preparing beta-type ruthenium trichloride, which adopts a drying and stirring device and comprises the following steps: step 1, beta-type ruthenium trichloride solution is added into a tank; step 2, a driving motor drives a stirring shaft to stir the solution at a rotating speed of 150-180 r / min, and meanwhile, an infrared lamp is used to heat the solution until the solution is skinned; step 3, when the solution is skinned, the rotating speed of the driving motor is adjusted to 100-120 r / min, the infrared lamp continues to heat, and the solution is slurried; step 4, when the solution is slurried, the rotating speed of the driving motor is adjusted to 50-80 r / min, the infrared lamp continues to heat, and the solution is agglomerated. Different rotating speeds of the motor are adopted at different stages of the material, the heat transfer efficiency of the material is ensured, the drying efficiency is accelerated, and the material consumption and energy consumption are reduced.

The application relates to the technical field of air conditioner intelligent control, and specifically discloses a multi-heat-exchanger intelligent defrosting control method and device based on multi-parameter fusion and heat load prediction and a storage medium, which comprises the following steps: collecting multi-dimensional operation data; performing feature calculation on the collected original data to obtain fin temperature change rate, evaporation pressure fluctuation rate and air enthalpy difference absolute value; constructing a fuzzy reasoning system to generate a frost formation confidence value; constructing a feedforward neural network model to generate an optimal defrosting cycle prediction value; generating a defrosting trigger instruction or a continuous monitoring instruction according to the confidence interval and the cycle achievement situation; detecting and pre-adjusting the pressure difference between the high-pressure side and the low-pressure side to execute switching between the running heat exchanger and the defrosting heat exchanger; collecting fin temperature data of the defrosted heat exchanger to generate a defrosting completion judgment result. Through improvement of the defrosting method, accurate frost formation state sensing, self-adaptive adjustment of the defrosting cycle, optimization of the judgment strategy and smooth control of the switching process are realized.

The utility model discloses a flat plate heat exchanger and water purifier thereof, include: center plate, the middle part has the heat exchange area, and the heat exchange area is the corrugated board structure with ridge portion and groove portion and the ridge portion and groove portion in it are the U type structure of the arrangement in turn alternation, first side plate is set up in one side of center plate and forms the cold water channel between both, and first side plate is provided with cold water inlet and cold water outlet respectively in the both ends corresponding cold water channel, second side plate is set up in the other side of center plate and forms the hot water channel between both, and second side plate is provided with hot water inlet and hot water outlet respectively in the both ends corresponding hot water channel. The utility model discloses flat plate heat exchanger effectively increased water channel length, increased heat exchange time, improved heat exchange efficiency, corresponding water purifier's cold water first preheats after, then heats through instant heating type heating body, effectively improved hot water outlet flow rate, avoided water repeatedly heating simultaneously, guaranteed drinking water health.

The utility model relates to the field of textile, concretely relates to a leveling mechanism of cloth inspecting machine, include: body and be located the rear side of body for cloth guide's guide roller, be located the preheating pipe of body and be located guide roller one side, the inside detachable mounting of preheating pipe has immersion type tubular heater. The utility model through atomizing nozzle even spraying hot water mist, avoid the cloth damage caused by ironing board contact, especially adapt sensitive material, spiral flow guide plate and immersion type heater realize water flow even fast heating in cooperation, guarantee temperature stability, make cloth heat sufficient, stress release even, significantly improve leveling quality and stability, and non - contact type spraying mode fundamentally avoided the problem that fiber fluff adheres sintering forms the dirt of scale on the surface of high -temperature ironing board, prevent the cloth hook silk, scratch and so on defects caused by dirt, reduce the equipment cleaning maintenance frequency simultaneously, improved the continuous operation reliability of cloth inspecting machine.

The invention relates to the technical field of gas separation, in particular to an SCR (Selective Catalytic Reduction) denitration reaction treatment method and equipment for galvanizing line flue gas. The method comprises the following steps: collecting flue gas flow, dust concentration, flue gas temperature, catalyst temperature and nitrogen oxide concentration; constructing an activity recovery necessity index, a denitration efficiency index and a waste heat utilization potential index; the real-time heat exchange efficiency is calculated, and the power of the heating device at the collection moment is adjusted for the first time; whether the power of the heating device continues to be adjusted is judged, and if yes, the power of the heating device at the collection moment is adjusted for the second time; and the power of the heating device is repeatedly adjusted until the super-cooling starting stage is started. According to the invention, the heating power can be adaptively set, and the energy consumption of the SCR denitration reaction is reduced.

The invention relates to the technical field of data center server heat dissipation, in particular to a multi-phase-change-point composite phase change capsule and an immersed server liquid cooling box, comprising a capsule shell and a plurality of capsule cores arranged in the capsule shell; phase-change materials with different phase-change temperature points are arranged in the plurality of capsule cores, and an electric insulation type cooling liquid is arranged in the box body. The capsule limiting plates are uniformly arranged in the box body; and the cooler is arranged at the top of the box body and is used for cooling the boiling electric insulation type cooling liquid. Phase-change materials with different phase-change temperature points are packaged in capsules to form a composite phase-change unit with multiple phase-change points and quick response, graded heat absorption can be realized in multiple temperature sections, a wider temperature control band, a higher response speed and a higher energy efficiency ratio are realized, part of high-cost fluorinated liquid is replaced, and the energy efficiency is improved. And the total cost of the system is reduced on the premise of not influencing the cooling performance.

This invention discloses a flue gas purification device for rubber production and processing, relating to the field of rubber processing flue gas purification technology. It includes a separation heat exchange cylinder, a dust collector, and a catalytic processor. The separation heat exchange cylinder has a top cover and further includes a hollow spiral cooling plate fixed inside the cylinder. A column is fixed in the middle of the hollow spiral cooling plate, which is filled with flowing coolant. Adjacent spirals of the hollow spiral cooling plate cooperate with the inner wall of the separation heat exchange cylinder to form a flue gas spiral flow channel. Two sealing plates are fixed on the inner wall of the separation heat exchange cylinder, located at opposite ends of the flue gas spiral flow channel. This invention integrates flue gas spiral heat exchange, centrifugal oil-gas separation, wall anti-clogging, and self-driven enhanced heat exchange into a single unit, meeting the comprehensive requirements of high-efficiency separation, waste heat recovery, long-term anti-clogging, and low-consumption operation in rubber flue gas treatment.

The utility model discloses a cleaning system for an MTO washing water cooler, relates to the technical field of online cleaning of coolers, and is mainly used for solving the problem that a washing water channel of the washing water cooler is blocked by oil sludge. The input end and the output end of the reagent conveying pipe are both communicated with a washing water channel of the washing water cooler, and a reagent recycling valve, a recycling settling tank, a recycling pump, a reagent tank, a reagent pump and a reagent output valve are sequentially arranged on the reagent conveying pipe in the reagent conveying direction; and a flushing reagent is filled in the reagent tank. The utility model provides a cleaning system for an MTO (Methanol To Olefins) washing water cooler, which can automatically clean oil sludge in a washing water channel, ensures the heat exchange efficiency of the washing water cooler, does not need excessive manual participation, and reduces the labor intensity and the maintenance cost.

The utility model provides a kind of multi-functional titanium tube heat exchanger, including shell and heat exchange coil, the cavity of accommodating the heat exchange coil is formed in the shell, the heat exchange coil has medium inlet pipe and medium outlet pipe, at least part of medium inlet pipe and medium outlet pipe is set out of the cavity arrangement;Water inlet pipe and water outlet pipe are provided on the shell and communicate with the cavity, water inlet pipe and water outlet pipe are respectively spaced along the height direction of the shell;First detection component is provided on the shell, first detection component is close to the water outlet pipe setting, and first detection component is used to detect the water outlet pipe water outlet state.Titanium tube heat exchanger, the water outlet state of water outlet pipe is detected by being provided with detection component, so as to avoid the fluid interruption in shell, cannot form circulation and cause titanium tube local overheating, heat exchange does not go out, compressor overload and other conditions, effectively guarantee the safe operation of titanium tube heat exchanger, prolong the service life of equipment.

The application provides a condenser assembly and a refrigerating device for an airplane, wherein the condenser assembly is applied to the airplane and comprises a condenser body having a first air port at a top end thereof and a second air port at a bottom end thereof, a heat exchange airflow flowing into the condenser body through one of the first air port and the second air port and flowing out through the other one of the first air port and the second air port, and a water collecting tray comprising a shell having a water collecting area at a bottom thereof and a ventilation area at an upper area of the water collecting area, wherein the ventilation area is arranged at least partially around a bottom end area of the condenser body, a water collecting depth of the water collecting area decreases from a middle to side edges, and a drain pipe is arranged in the water collecting area. The defrosting water collected in the water collecting area is not easy to overflow through the ventilation area at a higher position, so that the water collecting effect of the water collecting tray on the defrosting water is ensured, and the defrosting water on the condenser body can be reliably collected in the water collecting area of the shell under an inclined working condition.

The utility model discloses a heat conduction device of a railway turnout snow melting system. The heat conduction device comprises a heat conduction plate, an insulating layer and a heat preservation layer. The heat conduction device is characterized in that graphite is used as a heat conduction plate in the heat conduction device, a mica insulation layer and a polyurethane heat preservation layer are arranged on the surface, making contact with air, outside the graphite, a metal buckle is arranged outside the heat conduction device, the heat conduction device is installed on the two sides of the sliding bed table through the metal buckle, and the heat conduction device and the sliding bed table are connected together; and the metal buckle is fixed through the hexagonal head bolt and the hexagonal head nut. The heat conduction device provided by the utility model can transfer heat which is originally lost in the air by the heating strip to the slide table, the slide plate and the switch rail, so that the heat efficiency and the snow melting efficiency of the snow melting system are improved, the use of electric energy is reduced, and resources are saved; the thermal uniformity of graphite is good, so that the strength of the sliding table is effectively prevented from being influenced by over-high temperature at a certain position; when individual heat conduction devices are damaged due to extrusion and collision, the heat conduction devices on the sides of the slide plate can be independently disassembled, the practicability is good, and maintenance is convenient.

This invention discloses a waste heat recovery device for flue gas from a thermal oil aluminum melting furnace, relating to the field of baking furnace technology. The device includes a furnace, with a support rod fixedly connected to the outer wall of the furnace and an exhaust pipe fixedly connected to the top of the furnace. A furnace opening and closing door is provided on the front of the exhaust pipe, and a waste heat recovery mechanism is installed inside the exhaust pipe. By setting up the waste heat recovery mechanism, while heat is exchanged through inclined heat-conducting plates, the rotation of the inclined heat-conducting plates dynamically disturbs and redistributes the uneven heat distribution of the high-temperature flue gas within the exhaust pipe, continuously reconstructing the flue gas flow field. Through the continuous rotation of each inclined heat-conducting plate within the exhaust pipe, it is ensured that each inclined heat-conducting plate uniformly contacts and exchanges heat with the flue gas at all locations within the exhaust pipe, significantly improving the overall heat transfer efficiency and waste heat recovery rate.

The utility model provides a side air outlet window type air conditioner which comprises an air conditioner shell, an indoor side space and an outdoor side space are arranged in the air conditioner shell, a first fan used for driving indoor side airflow to flow through an indoor side heat exchanger is arranged in the indoor side space, and a second fan is arranged in the outdoor side space. The first fan comprises a centrifugal volute and centrifugal fan blades located in the centrifugal volute, the first motor is used for independently driving the centrifugal fan blades to rotate, the second motor is used for independently driving the second fan to rotate, and by taking the using direction of the side air outlet window type air conditioner as a reference, the axial projection of the rotating shaft of the first fan is larger than the axial projection of the rotating shaft of the second fan. A side air outlet is formed in the area, located on the left side or the right side of the indoor heat exchanger, of the air conditioner shell. According to the utility model, the rotating shaft for driving the first fan and the indoor heat exchanger can be centered left and right, so that the heat exchange efficiency of the indoor heat exchanger is ensured to be at a higher level.

This invention provides a method for constructing refractory bricks. The refractory bricks are installed onto L-shaped hooks pre-installed on a water-cooled wall. Filler is then placed between adjacent refractory bricks, and finally, self-flowing castable refractory is poured between the refractory bricks and the water-cooled wall. This method allows the refractory bricks to be fixed to the side of the water-cooled wall in contact with flue gas (i.e., the heat exchange surface) using hooks. This not only prevents high-temperature corrosion of the water-cooled wall by flue gas but also effectively ensures the heat exchange efficiency of the water-cooled wall and extends its service life.

The utility model discloses a kind of ducted fan, the ducted fan includes: fan cavity and return air cover, the fan cavity one side is air inlet, for by the air inlet return air, the fan cavity is equipped with the fan for return air;The return air cover is communicated with the fan cavity by auxiliary return air through-hole, for by auxiliary return air through-hole auxiliary fan return air, make the fan cavity one side by the air inlet return air, the other side by the auxiliary return air through-hole auxiliary return air, realize bidirectional return air.The utility model's fan cavity one side by air inlet return air, the other side by auxiliary return air through-hole auxiliary return air, realize bidirectional return air, greatly improve return air area, improve return air quantity, better satisfy the return air demand under different scenes, simultaneously by improving return air quantity avoid fan speed too high, improve the durability and operating stability of fan, reduce equipment noise, improve user experience.

An integrated rectangular disc finned tube comprises a base tube and a plurality of parallel rectangular disc fins which are located on the outer contour of the base tube and form an integrated structure with the base tube. The gap between every two adjacent rectangular disc fins is 0.2-50 times of the thickness of each rectangular disc fin, and the diameter of each rectangular disc fin does not exceed 10 times of the diameter of the base tube. According to the integrated rectangular disc finned tube, the rectangular section is easy to manufacture, the flow equalizing effect is good, the heat exchange efficiency is good, machining forming is facilitated, the production efficiency is high, machining stress is reduced, working media are evenly distributed, the heat exchange uniformity is improved, dust accumulation is reduced or even avoided, contact thermal resistance is eliminated, the heat transfer efficiency is high, stability is high, and the service life is long; and a self-rectification effect is achieved on smoke, and airflow flowing is facilitated. The heat exchanger can be widely applied to the technical field of heat exchangers.

The utility model provides a kind of engine cooling system, including engine, air inlet cover, air duct and heat exchanger, air duct is arranged between air inlet cover and heat exchanger, air duct is respectively communicated with the cold air inlet end of air inlet cover and heat exchanger, one end of engine is provided with fan, fan is set in air duct, the heat dissipation port of engine is communicated with the heat exchange air inlet of heat exchanger, at least one air guide channel and at least two first sound attenuation components are provided in air duct, first sound attenuation component is provided on the both sides of air guide channel, first sound attenuation component includes first air deflector and first sound attenuation cotton, first cavity is provided in first air deflector, a plurality of first perforations are set on the surface of first air deflector, first perforation is communicated with first cavity, and first sound attenuation cotton is set in first cavity;The utility model has the advantages of simple structure, high cooling efficiency and low noise.

The utility model relates to heat exchanger technical field, concretely for a kind of heat exchanger of controllable support angle, including the outside of the heat exchanger main part is provided with angle adjusting support frame component group, the angle adjusting support frame component group is used to support heat exchanger main part, the angle adjusting support frame component group includes push handle, the side of push handle is provided with sliding block.The utility model can let the angle of heat exchanger main part be adjusted, when heat exchanger main part is in angle inclination state, residual water liquid on the surface blade of heat exchanger main part can flow under the action of gravity, to avoid the case of manual wiping by personnel, improve the maintenance efficiency to heat exchanger main part.

This utility model discloses a flue gas heat recovery device for a gas-fired boiler, belonging to the field of flue gas heat recovery technology. It includes a storage tank, with a lower heat exchange tank fixedly connected to its top surface. In this utility model, the high-temperature water after heat exchange is stored in the storage tank, while the high temperature of the flue gas is used to keep the high-temperature water in the storage tank warm. Furthermore, a lower heat exchange tank, a middle heat exchange tank, and an upper heat exchange tank are arranged at the top of the storage tank. Flue gas and water exchange heat in these three tanks respectively. As the flue gas rises, its temperature gradually decreases, resulting in water at different temperatures in the lower, middle, and upper heat exchange tanks. When the water temperature in the upper tank reaches a predetermined value, the water moves down to the next tank for further heating, ensuring efficient heat exchange between the water and the flue gas, thus guaranteeing the quality of heat recovery from the flue gas. This method is highly practical.

The present disclosure provides a heat dissipation module, which includes a heat conducting member, a locking member, and at least one elastic member. The heat conducting member is movably floated on a circuit board and has a convex ring portion and a through hole penetrating the convex ring portion. The locking member is threaded through the through hole and fixed to the circuit board. The at least one elastic member is connected to the heat conducting member and abuts against the circuit board. The convex ring portion can move along the locking member to be adjacent to or away from the circuit board, so as to compress or release the elastic member.

The utility model relates to the field of motors, in particular to a motor with a temperature controller. The motor comprises a stator, the stator is provided with an iron core, and a framework and a winding are installed on the iron core. A containing groove is formed in the framework, the temperature controller is arranged in the containing groove, and the detection end of the temperature controller abuts against the winding; an adapter plate is arranged at the top end of the framework, an interface mechanism is arranged on the adapter plate, the interface mechanism comprises a temperature control interface arranged corresponding to the temperature controller, and the temperature controller is electrically connected with the temperature control interface. According to the invention, the temperature controller is embedded into the accommodating groove of the framework and is directly abutted against the winding, and the temperature conducting glue is used for filling, so that the heat transfer efficiency is ensured, the temperature detection sensitivity is improved, mechanical limiting is realized through a three-side closed structure of the groove body, and the temperature controller is prevented from deviating due to vibration. The thermal resistance of air gaps is further eliminated due to the temperature conduction characteristic of the glue, and the data real-time performance is guaranteed.

The utility model relates to the technical field of chemical equipment discloses a phenolic resin polycondensation reaction kettle, including kettle body, the top fixed mounting of kettle body has the kettle cover, the top fixed mounting of kettle cover has the manhole and the feed pipe, the bottom fixed mounting of kettle body has the discharge pipe, the inside of kettle body is provided with stirring mechanism and foam breaking mechanism, the bottom mounting of kettle body has supplementary defoaming mechanism, the utility model discloses through the cooperation and cooperation of stirring mechanism, foam breaking mechanism and scraper, can realize in material stirring process: physical broken rising foam, prevent its in kettle body upper portion and kettle cover inner wall accumulation break, significantly reduce the difficulty of cleaning, synchronous scraping off the adhesion of kettle body inner wall, keeps the heat transfer efficiency, cooperates the foam intercepting function of multilayer stainless steel wire net, finally makes resin adhesion amount to reduce below 1%, dehydration efficiency improves 40% or above, especially suitable for the production of high viscosity phenolic resin.

This utility model discloses a diamond flocked grinding disc, including a grinding disc body. A positioning hole is formed around the top surface of the grinding disc body, and a grinding disc cutter head is positioned above the grinding disc body. With this utility model, pulling a pull ring on one side of the grinding disc body moves a connected insert rod to the through hole position, at which point the positioning block at the bottom of the grinding disc cutter head is inserted into the positioning hole of the grinding disc body. After releasing the pull ring, the spring on the outside of the insert rod automatically passes through the positioning block and enters the insertion hole, achieving quick and easy installation of the grinding disc cutter head. When a damaged grinding disc cutter head needs to be replaced, pulling the pull ring again completely removes the insert rod from the insertion hole and enters the through hole, allowing the grinding disc cutter head to be moved upwards, disengaging the positioning block from the positioning hole, thus completing the disassembly of a single grinding disc cutter head. This enables modular replacement of grinding disc cutter heads, significantly reducing usage costs while improving the practicality and economy of the product, effectively overcoming the shortcomings of the original fixed structure.

The utility model discloses a small pipe diameter evaporator, including multiple heat exchange fins and heat exchange tube coil subassembly, the transverse pipe portion of heat exchange tube coil subassembly is clamped in the corresponding through -hole of all heat exchange fins, heat exchange tube coil subassembly includes at least two groups of heat exchange coil, heat exchange coil is composed of multiple transverse pipe portions and multiple U-shaped elbow pipe portions, the length of every heat exchange coil is consistent, the import end of all heat exchange coils is at the same side, and the export end of all heat exchange coils is at the same side of another side. Its heat exchange tube coil subassembly is composed of multiple heat exchange coils, all heat exchange coils are equipped with an import and an export, thereby making its refrigerant flow be big, guaranteeing heat exchange efficiency, and, the pipe diameter of the heat exchange coil that it adopts is small, makes its improved heat exchange coefficient, and its volume reduces, weight reduces, cost reduces.