5064results about "Heat transfer modification" patented technology

The invention relates to the technical field of finned heat exchangers, and discloses an adjustable finned heat exchanger which comprises a shell, air passing openings are formed in the two sides of the shell, a plurality of heat exchange modules used for heat transfer are arranged in the shell, the heat exchange module located in the middle is fixed to the shell, and the air passing openings are formed in the air passing openings. The other heat exchange modules are slidably connected with the shell through guide mechanisms, the distance between the heat exchange modules can be adjusted through adjusting mechanisms, the heat exchange modules are communicated through second corrugated pipes, and fans are fixed to the inner sides of the two ends of the shell through bolts. According to the heat exchanger, through the movable heat exchange module, auxiliary shaking can be conducted on water drops, the water drops fall off from the heat exchange module, the retention time of the water drops on the heat exchange module is shortened, corrosion of the water drops to the heat exchange module is reduced, and the service life of the heat exchanger is prolonged.

A heat sink comprising a heat exchange device having a large-scale morphology over a scale range and a small-scale texture over a scale range, wherein at least one of the large-scale morphology and the small scale texture has a fractal-like self-similarity over a scale range. The large-scale morphology and small-scale texture may be defined and implemented independently, or be provided with a transitional range. The large-scale morphology may be algorithmically optimized according to a set of geometrically constraints. The small-scale texture may be optimized according to aerodynamic parameters and constraints. The heat sink may be dynamically varying, and / or operated in conjunction with a dynamically varying heat transfer medium supply.

The invention discloses a heat exchange device which comprises a heat exchange base body, at least one side of the heat exchange base body is provided with a heating surface, a cooling channel capable of conducting heat with the heating surface is arranged in the heat exchange base body, and at least one section of channel in the cooling channel is a vortex channel; a spiral blade extending in the extending direction of the vortex channel is arranged in the vortex channel so that fluid can flow in a spiral mode. In the using process, due to the existence of the spiral blades, fluid rotates and advances in the flow channel, and the fluid can damage a boundary layer around the flow channel in the rotating process, so that the heat exchange capacity higher than that of a traditional structure is obtained, the heat exchange base body can be applied to occasions with higher heat flow density, and the heat exchange efficiency is improved. The heat exchange device can effectively solve the problem that an existing heat exchange device is poor in heat exchange effect.

The invention relates to a cooling tower device for recovering heat from waste steam, which adopts three layers of transversely arranged heat exchange tube groups, realizes cascade recovery of heat energy of waste steam through communication of an air inlet and an air outlet, and is additionally provided with fins on the surfaces of heat exchange tubes to enhance the gas-liquid mass transfer efficiency. The core innovation lies in that a built-in mechanical cleaning mechanism is arranged, a driving assembly is in linkage with multiple sets of bidirectional adapters through a rotating shaft, brush rods distributed in the circumferential direction are driven to conduct high-frequency physical scraping on heat exchange pipes and fins, scale deposition is effectively restrained, and compared with traditional chemical cleaning, the shutdown maintenance time is shortened; the steam latent heat recovery rate can be increased, meanwhile, secondary pollution is avoided through a full-mechanical cleaning scheme, modular layout is adopted in structural design, interlayer fluid distribution of the heat exchange pipe set is achieved through a U-shaped pipe and a straight pipe, it is ensured that the resistance coefficient of the system is lower than that of similar equipment, and the device has remarkable energy-saving benefits in industrial scenes such as chemical engineering and metallurgy.

A fairing assembly 10 installed about a heat exchanger, such as a radiator R, to reduce the drag on the vehicle, comprising: a frame installed about the heat exchanger, the frame having a curved contour; a panel mounted in the frame, the panel and fairing assembly defining an air passage for air flow to the heat exchanger; a cover installed in the frame and movable to control air flow through the passage to the heat exchanger; and, moving means for moving the cover over the frame to expose a portion of the opening and allow air to flow into the heat exchanger, the frame and cover thereby reducing the amount of drag on the vehicle while still allowing air flow into the heat exchanger; wherein the panel comprises a first overlapping part and a second overlapping part; and wherein the first overlapping part is moveable from an extended position to a retracted position when the fairing is impacted.

A liquid cooled heat exchanger includes first and second heat exchange chambers that are in thermal communication. The first heat exchange chamber is downstream of the second heat exchanges chamber and receives heat from a heat generating device, such as an electronic circuit. Heat in the first heat exchange chamber can be transferred to the second heat exchange chamber to increase the temperature of a subcooled liquid working fluid in the second heat exchange chamber. This can render a pressure drop across the heat exchanger that is relatively insensitive to a fraction of liquid that is vaporized in the first heat exchange chamber.

An air / oil heat exchanger arranged in a vein. The exchanger includes internal parietal corridors and / or external parietal corridors and central corridors, the radial height of the internal and / or external parietal corridors increasing from the inlet of the exchanger to its outlet.

The utility model discloses a shell-and-tube efficient heat exchanger which comprises a heat exchanger body and a first liquid inlet tube, the bottom of the first liquid inlet tube is fixedly installed on the top of a tube box, the first liquid inlet tube comprises a communicating tube, a connecting tube, a pressing block, a filter plate, a connecting block and a clamping mechanism, and the bottom of the communicating tube is fixedly installed on the top of the tube box. The inner wall of the bottom of the connecting pipe and the top of the communicating pipe are slidably mounted, the top of the pressing block and the inner surface of the connecting pipe are fixedly mounted, the top of the pressing block and the interior of the communicating pipe are slidably mounted, the outer surface of the filter plate and the interior of the communicating pipe are clamped, the side face of the top of the connecting block and the outer surface of the connecting pipe are fixedly mounted, and the clamping mechanism is arranged on the surface of the communicating pipe. A clamping mechanism is arranged, a pull rod is transversely pulled, a U-shaped rod and a clamping column are driven to horizontally move and are separated from the interior of a connecting block, then a connecting pipe is moved upwards, the connecting pipe is separated from a communicating pipe, impurities on the surface of a filter plate are cleaned, and the situation that the filter plate is blocked after the impurities are accumulated, and the injection rate of fluid is affected is avoided.

The invention discloses a vibration type battery liquid cooling device and a method thereof.The vibration type battery liquid cooling device comprises a sealing box body containing cooling liquid, a battery, a temperature adjusting assembly, a water pump, a vibration assembly and a controller, a gas cavity is formed between the upper surface of the cooling liquid and the inner top wall of the sealing box body, and the battery is detachably installed in the sealing box body and immersed in the cooling liquid; the temperature adjusting assembly is arranged on the inner wall of the sealing box body, the vibration assembly is arranged at the bottom of the outer side of the sealing box body, a water inlet and a water outlet lower than the water inlet are formed in the two sides of the sealing box body respectively, and the water inlet and the water outlet are connected with the water pump through pipelines respectively to form a circulating water path. The controller is in signal connection with the temperature adjusting assembly, the water pump and the vibration assembly. On the basis of circulating water cooling of a traditional battery, vibration generated by the vibration exciter installed below the sealed box body promotes instability of a temperature boundary layer in cooling liquid, the convection heat exchange efficiency of flowing is improved along with enhancement of vibration strength, and the cooling efficiency is improved.

A heat exchanger includes a fluid flow passage with a wavy fin turbulizer. The turbulizer includes sidewalls extending lengthwise along a fluid flow direction between its first and second ends, and the sidewalls are spaced apart across the width of the turbulizer. Each flow channel of the turbulizer is defined between two adjacent sidewalls. Each sidewall has a smoothly and continuously curved profile with repeating wave forms being defined along the length of the turbulizer. The continuously curved profile of the sidewalls is defined by a non-circular shape, such as elliptical, sinusoidal, parabolic and hyperbolic shapes. The radius of curvature changes constantly and reaches a maximum at or near the inflection point between adjacent crests and troughs of the profile, to provide improved particle pass-through, lower pressure drop, and enhanced plateability of internal surfaces.

The invention relates to the technical field of coolers, and provides a plate type cooler which comprises a box body and a spraying pipe and further comprises a plurality of heat exchange plates, the heat exchange plates are arranged in the box body at intervals and located below the spraying pipe, every two adjacent heat exchange plates are communicated, each heat exchange plate comprises a plate body, each plate body is provided with a cavity, and heat exchange water is introduced into each cavity; the multiple turbulent flow strips are arranged in the cavity at intervals, each turbulent flow strip is provided with a baffling part and a turbulent flow part, one end of each baffling part is arranged on the inner wall of the plate body, and each turbulent flow part is rotationally arranged at the other end of the corresponding baffling part; the control piece penetrates through one side of the plate body and extends out of the box body, the control piece is provided with a connecting end, the connecting end is arranged on the turbulent flow part, and the control piece is used for driving the turbulent flow part to rotate. By means of the technical scheme, the problems that in the prior art, due to the fact that channels between the plates of a traditional plate cooler are very narrow, the phenomenon of blockage after scaling is prone to occurring, and the heat exchange effect is affected are solved.

The invention is an apparatus for amplifying cooling through interaction with electromagnetic radiation for optical of objects and / or object surfaces with essentially three layers, which are a bottom layer that is comprised of a single or multi layered material configured to emit IR radiation; a middle layer that is comprised of a single or multi layered material configured to respond in anti-Stokes fluorescence upon absorption of electromagnetic radiation; and a top layer that is comprised of a single or multi layered material configured to reflect selected spectral band(s) and / or amplify selected spectral band(s) of the electromagnetic radiation transmittable to the middle layer.

A system for dissipating heat from a component includes a heat pipe assembly and an adsorption bed. The heat pipe assembly may include a pair of walls defining an inter-wall volume between opposing faces of the pair of walls. The heat pipe assembly may be configured to be thermally coupled to the component such that the pair of walls extends away from the component. The adsorption bed may at least partially occupy the inter-wall volume. The adsorption bed may include an adsorbent medium and a phase change material. The phase change material is configured to dissipate heat away from the component by a phase change from a first phase to a second phase.

A composite radiative cooling material includes a first layer including a reflective material, a second layer including a porous material, and a third layer including an emissive material. The optical properties of the respective materials and the arrangement of the respective layers cause the radiative cooling material to exhibit a total solar reflectance greater than 85%, and a thermal emissivity greater than 85% in a wavelength range of 8 to 13 μm. The layers may be in a vertically stacked arrangement, with the third layer capable of directly facing the sky when the composite radiative cooling material is installed for cooling a load, the second layer arranged under the third layer, and the first layer arranged under the second layer. The composite radiative cooling material may be thermally coupled to a cooling load to provide radiative cooling to the cooling load.

The present invention relates to the technical field of geothermal systems, and specifically discloses a buried high-efficiency heat exchanger in a medium-deep geothermal well, comprising: an outer sleeve, an inner sleeve coaxially embedded in the outer sleeve, and a heat storage slow-flow unit located at the lower end of the inner sleeve; the heat storage slow-flow unit effectively separates a heat exchange flow channel and a return flow channel through a flow partition to prevent direct mixing of cold and hot fluids and avoid thermal short circuits; the spiral diverter and the slow-flow unit are used for dynamic adjustment to extend the fluid's underground residence time, enhance turbulence intensity, and improve heat exchange efficiency; the kinetic energy of the fluid is used to drive turbine blades and a rotating shaft to drive the diverter and reciprocating parts to move, and dynamic adjustment of the fluid path can be achieved without external energy; the slow-flow structure and the flexible capsule reduce the impact of the fluid on the formation and reduce reservoir disturbance; the closed-loop design avoids the extraction of groundwater and prevents pollution, and the inner sleeve insulation cavity blocks radial heat transfer and reduces heat loss in the return flow channel.

The invention relates to a cooling device for cooling an electrical and / or electronic assembly (2), said cooling device comprising: a top plate (3) and a bottom plate (4), the bottom plate (4) being a deep-drawn component having a depression (40), the top plate (3) and the bottom plate (4) being arranged such that, due to the depression (40) a cooling channel (5) is formed between the top plate (3) and the bottom plate (4), the top plate (3) and the bottom plate (4) being connected to one another at a contact region (8) outside the depression (40), it being possible for a cooling fluid flow of a cooling fluid to flow through the cooling channel (5) along the longitudinal direction (11), the cooling device (1) also comprising at least one turbulator (6) that is arranged inside a turbulator section (56) of the cooling channel (5). According to the invention, a turbulence portion (61) for generating local turbulence in the flow of the cooling fluid and a blocking region (62) for locally blocking the flow of the cooling fluid are formed on the turbulator (6).

The invention provides an air conditioner energy-saving waste heat recycling device which comprises an outer box body, a cold water tank, a heat preservation box, a waste heat heating assembly, a waste heat heat preservation assembly, a refrigerant main pipeline and a refrigerant auxiliary pipeline, the refrigerator main pipeline is arranged on the side face of the outer box body, and the cold water tank is arranged at the top in the outer box body; a cold water inlet is formed in the top of the outer box body, the cold water inlet is connected with the cold water tank, the waste heat heating assembly is arranged at the bottom of the cold water tank, the heat preservation box is arranged at the bottom of the waste heat heating assembly, and the waste heat heat preservation assembly is arranged in the heat preservation box. The waste heat temperature rising assembly and the waste heat heat preservation assembly are connected with the refrigerant main pipeline through refrigerant auxiliary pipelines. According to the waste heat heating assembly, the utilization efficiency of air conditioner waste heat is improved by slowing down the water flow speed, and waste heat loss is avoided.

Hybrid evaporative and radiative cooling panel systems having increased cooling efficiency while minimizing water consumption are provided. The disclosed hybrid systems include a cooling panel that enables the improved cooling and water consumption via a reflector layer which reflects solar radiation, an evaporative and infrared-emitting layer that is solar-transparent and water-rich, and an insulation layer that is vapor-permeable. infrared-transparent. and solar-reflecting. The cooling panel is configured to be in fluid communication with a heat exchanger. The cooling panel is further configured to cool a heat transfer fluid by way of both evaporative cooling and radiative cooling. The cooling panel is also configured such that the heat transfer fluid passes at least one of through or across the cooling panel and flows to the heat exchanger. Various configurations of such panels and panel systems. and methods of implementing the principles associated with the same. are also disclosed.

The invention discloses a micro-channel flow boiling enhanced heat transfer device based on a bionic structure. The device comprises a micro-channel structure base body, a channel inner surface wettability regulation and control layer, a working medium inlet and a working medium outlet. A bionic structure microchannel is arranged in the microchannel structure base body, the inner wall of the microchannel structure base body is provided with a micron-scale or nanometer-scale texture structure, the bionic structure microchannel is composed of a main channel and branch channels of at least three levels of fractal hierarchical structures, the width ratio of the branch channels is 1: 0.2-0.5, and the length range of the branch channels is 2-10 mm. And the contact angle gradient of the wettability regulation and control layer on the inner surface of the channel is 5-120 degrees. The tail end of each branch channel is provided with a bubble capturing groove with the diameter of 5-10 mm and the depth of 5 mm. The device can improve the boiling heat transfer coefficient, reduce the flow resistance and improve the bubble generation and desorption process, and is suitable for the fields of heat dissipation of high-heat-flux electronic equipment, aerospace heat management, chemical reaction and the like.

The invention discloses a high-temperature radiation furnace tube for enhancing heat transfer as well as a preparation method and application of the high-temperature radiation furnace tube. The heat-transfer-enhanced high-temperature radiation furnace tube comprises a high-temperature radiation furnace tube, namely a thick tube, of which the inner surface is subjected to roughness treatment and / or a high-temperature radiation furnace tube, namely a streaming terminal, of which the inner surface is sequentially subjected to roughness treatment and streaming structure surfacing treatment, and the roughness parameter Ra of the inner surface of the thick tube is 3.2-40.5 m; and the streaming structure is in one or more forms of a sphere, a raindrop shape and a strip shape. According to the invention, the heat conduction effect and the temperature and airflow uniformity of the furnace tube can be obviously improved through combination of slight increase of the inner surface area and a micron-scale inner surface streaming structure within a certain range, meanwhile, the filling volume of a catalyst in the furnace tube is not influenced, and obvious pressure drop at the outlet end of the furnace tube is avoided.

The invention relates to the technical field of smoke exhaust waste heat recovery devices, and discloses a waste heat utilization and recovery device and method applied to boiler combustion smoke, and the waste heat utilization and recovery device applied to the boiler combustion smoke comprises a bottom frame, and a heat absorption mechanism, a middle section partition plate and a heat release assembly which are fixedly mounted at the top of the bottom frame in sequence; through the arrangement of the heat buffering assembly, when the temperature of smoke is high, the heat absorbing fins can absorb part of heat and conduct the heat to the medium storage cavity, a medium in the medium storage cavity absorbs the heat to be evaporated into gas, and the gas is filled with an inflatable heat conduction film through a gas flowing cavity; the inflatable heat conduction film is expanded to store the gaseous medium, the gaseous medium is dissipated when the smoke temperature is low, the gaseous medium is condensed into liquid after heat dissipation, then the liquid is absorbed by the liquid absorption core plate and returns to the medium storage cavity, and therefore heat transfer and buffering are facilitated, and damage of thermal shock to device parts is reduced.

An information handling system includes a processor, a memory device, and a PMU to provide power to the processor and memory device. The information handling system further includes an emitter-assisted heatpipe including an enclosed hollow chamber to house a working fluid capable of being vaporized upon application of heat at an evaporator end of the heatpipe, an ion emitter placed at the evaporator end of the heatpipe where the working fluid is vaporized upon application of heat to create a vapor within the enclosed hollow chamber of the heatpipe, the ion emitter to create ions within the vapor, an ion collector placed at a condenser end of the emitter-assisted heatpipe where the vapor condenses into a liquid, and an ionic driving circuit operatively coupled to the ion emitter, the generated ions to be attracted to the ion collector creating an ionic airflow of the vapor within the emitter-assisted heatpipe.

Battery module (1) comprising at least one battery cell (3) and at least one heat pipe (4) which is in thermal contact with the at least one battery cell (3), wherein the heat pipe (4) has an evaporator section (10) and a condenser section (12), wherein at least one surface-enhancing element (13, 26) is arranged on the evaporator section (10) and / or the condenser section (12), wherein the battery module (1) has at least one actuator (20), wherein the at least one surface-enhancing element (13, 26) is displaceable relative to the heat pipe (4) by means of the at least one actuator (20), wherein the at least one surface-enhancing element (13, 26) is made of a material with good heat conductivity.

The invention provides a heat exchanger with an internal bypass function, belongs to the technical field of refrigeration equipment, and solves the problems that in the prior art, in order to meet the low-pressure-drop requirement of high-viscosity fluid, a plate heat exchanger has to increase the number of runners and reduce the flow speed of the fluid; and the heat transfer performance of the plate heat exchanger is greatly abundant, the cost is high, and the size is large. The heat exchanger with the internal bypass function comprises a sealing plate and a bottom plate, multiple layers of heat exchange plates are arranged between the sealing plate and the bottom plate and used for heat exchange between a refrigerant and liquid, a bypass liquid inlet is fixedly formed in the sealing plate, and a bypass liquid outlet matched with the bypass liquid inlet is fixedly formed in the bottom plate. And a plurality of closed flow channels are formed between the adjacent heat exchange plates through the convex structures and the concave structures. The method has the advantage that the cost of the plate heat exchanger can be reduced.

To enhance the heat transfer effect of a riser heat exchanger.SOLUTION: A riser heat exchanger includes: a riser body, wherein an upper flange is fixedly mounted on the outer side of an upper end of the riser body, an inner cylindrical sleeve is provided in the riser body, a heat exchange pipe body positioned in the riser body is provided on the outer side of the inner cylindrical sleeve, the heat exchange pipe body has a drainage port provided at the front side of an upper end thereof and a water supply port provided at the front side of a lower end thereof; an auxiliary assembly is mounted in the inner cylindrical sleeve and located on the inner side of the heat exchange pipe body, the auxiliary assembly including a first mounting plate, a support block, a fixing plate, a heat conduction fin, a fixing bolt and a threaded hole; and an upper fixing ring mounted at an inner upper end of the riser body. The double-coiled riser heat exchanger, in order to improve overall heat transfer enhancement effect, enables functioning to effectively disturb raw gas entering the riser body, with the heat conduction fin assisting in heat conduction, and also enables avoiding unifying an entire heat conduction structure.SELECTED DRAWING: Figure 1

Cooling arrangement (7) for cooling an electrical unit (10), wherein the cooling arrangement comprises: a heat sink (5), a substrate (6), wherein the heat sink comprises: a cooling channel (35) through which coolant can flow in a predetermined direction, a cooling wall (50) on the side of the cooling channel facing the electrical unit (10) to be cooled, wherein the substrate is positively connected to the heat sink at the cooling wall, and is designed so that the electrical unit can be mechanically fixed to it on the side facing away from the heat sink, wherein the cooling arrangement is designed so that, in operation, the coolant is guided through the cooling channel at a predetermined operating pressure which is higher than the ambient pressure which is present on the substrate on the side of the electrical unit to be cooled, and wherein a distance (D) between the cooling channel (35) and the cooling wall (50) is selected to be so small,that the heat sink, without the positively connected substrate, cannot ensure sufficient dimensional stability and / or sealing at the specified operating pressure, and the substrate and its positively connected connection to the heat sink on the cooling wall are designed such that the cooling arrangement can ensure this sufficient dimensional stability and sealing, and wherein the heat sink is monolithic. Also disclosed are an electronic assembly with such a cooling arrangement, an electrical power converter with such an electronic assembly, and methods for assembling these devices.

The invention provides a geothermal heat storage enhanced heat exchange device, and mainly relates to the technical field of geothermal energy collection equipment. A geothermal heat storage enhanced heat exchange device comprises an upper water tank and a lower water tank symmetrical to the upper water tank. A plurality of evenly-distributed heat exchange pipes are fixedly installed between the upper water tank and the lower water tank, the upper water tank and the lower water tank are communicated through the heat exchange pipes, the top face of the upper water tank is fixedly communicated with a liquid inlet pipe, the bottom of the lower water tank is fixedly communicated with a liquid outlet pipe, and a scraping plate is arranged between the upper water tank and the lower water tank. The scraping plate is driven by a lifting assembly to move, and the heat exchange pipes vertically penetrate through the scraping plate and are in sliding fit with the scraping plate. The heat exchange device has the beneficial effects that the heat exchange area is obviously increased by arranging the multiple heat exchange pipes which are evenly distributed, so that the heat exchange efficiency is improved, the scraping plate can be driven by the stepping motor to accurately ascend and descend, impurities attached to the surfaces of the heat exchange pipes are effectively removed, and the adverse effect of the impurities on the heat exchange efficiency is avoided.

The invention belongs to the technical field of heat exchange equipment, and particularly relates to a double-layer coil pipe type multi-stage heat exchanger and a heat exchange method thereof.The double-layer coil pipe type multi-stage heat exchanger comprises multiple heat exchanger bodies which are sequentially connected in series, each heat exchanger body comprises an outer cylinder, an inner cylinder, a first-layer coil pipe and a second-layer coil pipe, and each outer cylinder is arranged on the outer wall of the corresponding inner cylinder in a sleeving mode and provided with a fluid inlet and a fluid outlet; a fluid inlet and a fluid outlet which are communicated are formed in the inner cylinders, the fluid outlet of the upper-stage inner cylinder is communicated with the fluid inlet of the lower-stage inner cylinder, and the first-layer coil pipe and the second-layer coil pipe are both arranged in an annular cavity formed by the outer cylinder and the inner cylinders.

A chamber, e.g. in a heat exchanger or flowing electrolytic half-cell, for through flow of a fluid which is capable of elastic turbulence has an internal structure with obstructions to compel flow to undergo successive changes of direction thereby applying stress to the flow of fluid through the chamber. The internal structure comprises an upstream portion in which the applied stress induces elastic turbulence to begin and a downstream portion which applies less stress per unit length and sustains the elastic turbulence while providing economy of pressure to propel the fluid. Configuration of the upstream portion may be planned with computer modeling so as to avoid formation of stagnant zones.

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.