78results about How to "Avoid excessive temperature rise" patented technology

The invention discloses a method for processing ethylene tar, which selects an appropriate cutting point to fractionate the ethylene tar into a light fraction and a heavy fraction aiming at the characteristics of high content of arene, colloid and carbon residue in the ethylene tar. The light fraction passes through a hydrogenation protection reaction zone, a hydrofining reaction zone and a hydrocracking reaction zone sequentially to obtain a gasoline fraction and a diesel oil fraction; and the heavy fraction is used as a universal type carbon fiber asphalt stock. The method for processing the ethylene tar makes full use of the total fraction of the ethylene tar and increases the additional value of the ethylene tar. In addition, the method enables the arene after hydrostturation in the ethylene tar to open ring, crack moderately and / or isomerize by selecting two types of hydrocracking catalysts to perform grading loading so as to obtain the diesel oil fraction with condensation point less than -40 DEG C in high yield and obtain a side product high-octane gasoline fraction at the same time.

The invention discloses an electric automobile battery pack heat management and temperature balancing control method. According to the electric automobile battery pack heat management and temperaturebalancing control method, a battery module, a battery box, a BMS and a warning device are provided; a heating film is arranged at the periphery of the battery module; a plurality of temperature sensors are distributed in the battery box equidistantly and a plurality of fans capable of controlling rotation angles are arranged in the battery box; and the BMS evaluates the stage of the battery by monitoring the temperature of the battery pack through the temperature sensors, and performs heat management on the battery pack by taking 0 DEG C, 33 DEG C and 53 DEG C as temperature control thresholdvalues and combining temperature increasing rate and temperature difference as judgment conditions, wherein the temperature of the battery pack is maintained within the work range by the measures of selectively heating the heating film as well as accurately controlling the rotation angle of the fans, the starting time and the cooling air quantity. By the method, too high temperature increment andtoo large temperature difference of the battery are effectively avoided, battery temperature change stability and balanced characteristics are guaranteed and the service life of the lithium battery isprolonged.

The invention discloses an electric rice cooker capable of supplementing heat, which comprises an upper cover component, a cooker body component and an inner pot. The cooker body component is hinged with the upper cover component, and the inner pot is placed in the cooker body component. The electric rice cooker is characterized in that an air inlet, a hot air system and a hot air outlet are arranged in the upper cover component, and the hot air system supplements heat for the inner pot. As the hot air system is used for supplementing heat for food in the inner pot of the electric rice cooker, particularly, shortcomings that heat and cooking degree of rice on the upper portion of the electric rice cooker during rice cooking in the prior art are insufficient are overcome, furthermore, rice cooking time does not to be prolonged, power of an upper cover heater either does not need to be increased, energy is saved, and the problem that the temperature of an upper cover rises over high is avoided. Besides, the electric rice cooker is simple in structure and safe in use.

The invention discloses a method for hydrogenating ethylene tar, which selects an appropriate cutting point to fractionate the ethylene tar into a light fraction and a heavy fraction aiming at the characteristics of high content of arene, colloid, carbon residue and asphaltene in the ethylene tar. The light fraction passes through a hydrogenation protection catalyst, a hydrofining catalyst, a hydrogenation and carbon residue-removing catalyst and a hydrocracking catalyst sequentially to obtain a gasoline fraction and a diesel oil fraction; and the heavy fraction passes through the hydrogenation protection catalyst, the hydrogenation and carbon residue-removing catalyst and a hydro-conversion catalyst sequentially to obtain a gasoline fraction and a diesel oil fraction. According to the component characteristics of the light fraction and the heavy fraction of the ethylene tar, the method selects different hydrogenation schemes so as to convert the ethylene tar into fuel oil to a great extent, increase the additional value of the ethylene tar and make the device operate for a long time.

The invention discloses a method for hydrotreating ethylene tar, which comprises the following steps of: performing fractional distillation on the ethylene tar by selecting a proper cutting point to obtain light and heavy fractions; making the light fraction contact a hydrogenation protective agent, a hydrogenation refining catalyst, a hydrogenation carbon residue catalyst and a hydrocracking catalyst in turn, reacting to obtain products, and separating the products to obtain gasoline and diesel fractions; and making the heavy fraction contact a hydrogenation protecting catalyst, a hydrogenation carbon residue removing catalyst and a hydro-conversion catalyst in turn to obtain hydro-conversion generated oil, wherein partial hydro-conversion generated oil is circulated to enter a hydrogenation reaction area, and the rest hydro-conversion generated oil is separated to form gasoline and diesel fractions. In the method, according to composition characteristics of the light and heavy fractions of the ethylene tar, different hydrotreating schemes are selected, so that the ethylene tar is converted into fuel oil to the greatest extent, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved, the running period of the device is prolonged, full fractions of the ethylene tar are fully utilized and the added value of the ethylene tar is improved.

The invention relates to a permanent magnetic traction motor, to be specific, relates to a high speed train totally enclosed type permanent magnetic traction motor, which is used to solve the problems of the conventional totally enclosed type permanent magnetic motors such as poor cooling effect and inability of controlling internal even temperature rising of motor. The technical scheme provided by the invention is that a base is provided with axial air vents; end covers are provided with internal air ducts, which are connected with the base in a sealed manner, and the end covers, the internal air ducts, and the base air vents are used to form cooling wind paths in an encircled manner; the end covers are provided with cooling air inlet holes, and the outer sides are provided with cooling air outlet holes; two ends of a rotating shaft are fixedly provided with sealing discs, which are disposed between the end covers and the base, and are connected with the end covers in a sealed manner, and blades are fixedly disposed on the sealing discs between the cooling air outlet holes and the cooling air inlet holes; and self-circulation sectors are fixedly disposed on permanent magnet baffle plate clamping rings. The high speed train totally enclosed type permanent magnetic traction motor is advantageous in that 1, the three wind paths are used for the independent temperature control of the integral body of the motor; 2, the internal temperature rising of the motor is controlled in a balanced manner, and the overhigh temperature rising or the uneven temperature rising of the motor is prevented; 3, the independent cooling wind paths are designed for bearings, and then failure caused by the overhigh temperature of the bearings caused by thermal radiation and heat conduction is prevented.

The invention relates to a pump, in particular to a centrifugal pump applicable to high-temperature and high-freezing point media and a use method thereof, which is characterized in that: before the pump is started, steam higher than the freezing point of the media is input in a pump cavity and a steam heating jacket from a steam heating inlet and a steam blowing inlet for heating the pump and blowing off residual media in the pump cavity; when the pump operates, the steam heating jacket is used for controlling the media temperature of the pump to be higher than the freezing point; after the pump stops operating, a pump accessing valve is closed; the steam is input in the pump cavity from the steam blowing inlet; the frozen residual media in the pump cavity is liquefied and cleared from the pump cavity, thereby solving the difficulties caused by high temperature and high freezing point. The pump of the invention brings sealing and flushing media of a working pump to a sealing cavity and a pump cavity of a stand-by pump, causes the media of the stand-by pump to be in flowing state and improves the using performance of the centrifugal pump of the high-temperature and high-freezing point media.

An intravascular ultrasound (IVUS) device that includes a flexible elongate member having a proximal portion and a distal portion; a controller coupled to the distal portion of the flexible elongate member; an ultrasound transducer disposed at the distal portion of the flexible elongate member and in communication with the controller; a pressure transducer disposed at the distal portion of the flexible elongate member and in communication with the controller; and plurality of conductors extending from the controller to the proximal portion of the catheter, at least one conductor of the plurality of conductors being configured to carry both the signals representing information captured by the ultrasound transducer and information captured by the pressure transducer.

The invention discloses a corrosion inhibition type supercritical water oxidation reactant mixing and pre-oxidizing device. The device is composed of a plurality of reactant mixing-pre-oxidizing device core tubes and outer tubes in a series connection mode along the way, and a core tube channel and an outer tube channel are formed. The core tube channel is sequentially provided with a plurality of reactant A injection ports along the way, the reactant A injection ports are used for injecting reactants A into the outer tube channel in a grading mode, and the outer tube channel is used for stage-by-stage mixing of the reactants A and reactants B and supercritical water oxidation reaction. The mixing and oxidizing process of organic waste and an oxidizing agent is effectively controlled, ultra-high-temperature damage caused by local concentrated heat release is avoided, and intensified corrosion of the high-concentration oxidization agent on equipment materials is relieved. The corrosion inhibition type supercritical water oxidation reactant mixing-pre-oxidizing device is arranged on an entrance of a supercritical water oxidation reactor, the service environment harshness of the supercritical water oxidation reactor is remarkably reduced, the service life of the reactor is prolonged easily, overall maintenance cost in the later stage of the supercritical water oxidation reactor is reduced, and the corrosion inhibition type supercritical water oxidation reactant mixing and pre-oxidizing device can be widely applied to performing supercritical water oxidation reactant on various heavy-pollution industrial wastewater and sludge.

The invention belongs to the technical field of high-voltage power supply and particularly relates to a current-limiting hybrid power controller. The current-limiting hybrid power controller combines a current limiter and a hybrid switch. Under the condition of normal operation, the current limiter amounts to a lead, and the circuit is connected and disconnected by the hybrid switch composed of a solid-state switch and a mechanical switch in parallel. Under the condition of current surge in load short-circuit, capacitor electrifying and the like, the current limiter works at the current limit state, the circuit current is limited, a direct-current contact reliably cuts off load when in load short-circuit, the capacitor can be charged in a current limiting mode when being charged, and overhigh surge current or temperature rise of the solid-state switch is avoided.

An exhaust gas purifying device for an engine according to the present invention includes a NOx absorbing catalytic converter provided in an exhaust path of the engine, an exhaust light oil adding injector which supplies a reducing agent component into the exhaust path, a control unit which executes the rich spike operation that controls an air-fuel ratio to the rich side per predetermined time, which adds the HC component to the NOx absorbing catalytic converter, and which heats to an S purge temperature or higher so as to eliminate a sulfur component absorbed by the NOx absorbing catalytic converter, and a catalyst temperature measuring sensor which measures the temperature of the NOx absorbing catalytic converter, wherein the control unit controls an operation cycle of the rich spike operation based on the deviation of the S purge temperature with respect to the temperature measured by the catalyst temperature measuring sensor.

Disclosed is a servo motor. The servo motor comprises a motor shell, a stator, a rotor, a motor rotating shaft, end covers, an encoder and a cooling frame, wherein the encoder is mounted at the rear end of the motor rotating shaft, each end cover comprises an end cover body and a projecting portion with a shaft hole, and the cooling frame is arranged between the motor shell and the stator. Each end cover body is provided with a bearing cover mounting hole and a bearing mounting hole, a bearing is mounted in the bearing mounting hole, a bearing cover for covering the bearing is fixedly arranged in the bearing cover mounting hole, a through hole is formed in the center of the bearing cover, and a press ring projecting inwardly is arranged on the inner wall of the bearing cover, extends into the bearing mounting hole and abuts against the inner wall of the bearing mounting hole and an outer race of the bearing. Each end cover body is provided with an axially projecting flanged portion, and a plurality of clamping openings are formed in the inner wall of the end cover body. Step portions are arranged at the two ends of the motor shell, the inner walls of the end cover bodies abut against and are connected with end faces of the step portions by clamping, and the flanged portions abut against step faces of the step portions and are fixedly locked by screws.

The invention provides a paraffin phase change heat storage temperature adjusting device for semiconductor technology temperature control equipment, and belongs to the technical field of temperature control equipment. The paraffin phase change heat storage temperature adjusting device comprises a shell and multiple temperature adjusting units located in the shell. A compressor exhaust heat exchange cavity is formed between every two adjacent temperature adjusting units, and a compressor exhaust heat exchange cavity is formed between each temperature adjusting unit and the shell. Each temperature adjusting unit comprises a refrigerating medium heat exchange cavity in the middle and paraffin heat storage cavities located in the two sides of the refrigerating medium heat exchange cavity. The upper end and the lower end of each paraffin heat storage cavity communicate through a paraffin communicating pipe. The two ends of each refrigerating medium heat exchange cavity are provided with a refrigerating medium liquid outlet pipe connector and a refrigerating medium liquid inlet pipe connector correspondingly. The two ends of each compressor exhaust heat exchange cavity are provided with a compressor exhaust gas inlet pipe connector and a compressor exhaust gas outlet pipe connector correspondingly. According to the device, heat in compressor exhaust waste heat is stored in paraffin, the paraffin achieves heating and temperature adjusting on a refrigerating medium in the phase change process, and the temperature control equipment is more economical and environment-friendly and saves more energy; and loads of a cooling-water machine attached to a semiconductor enterprise can be reduced, and energy consumption is further reduced.

The invention discloses a method for producing light fuel oil from ethylene tar. The method is as below: fractionating ethylene tar into a light fraction and a heavy fraction; mixing the heavy fraction with a conventional coking raw material, and subjecting the mixture to delayed coking to obtain coker gasoline, coker diesel and coker gas oil; mixing the coker gasoline and the coker diesel with the light fraction of the ethylene tar, and subjecting the mixture to a hydrofining reaction; distilling the product to obtain a gasoline fraction I and a fraction heavier than the gasoline; subjecting the fraction heavier than the gasoline to a hydrogenation treatment to obtain light fuel oil, and distilling to obtain a gasoline fraction II and a diesel product; and mixing the gasoline fraction I and the gasoline fraction II to obtain a final gasoline product. The method provided by the invention utilizes the characteristics of high contents of ethylene tar aromatic hydrocarbons, colloid, carbon residue and glial and asphaltene of ethylene tar to fractionate the ethylene tar into the light fraction and the heavy fraction; different processing methods are employed to improve the added value of ethylene tar, increase yield of gasoline and diesel, improve product quality of light fuel oil and realize long-period stable operation of devices.

The invention discloses a distributed winding flexible transformer formed by the mixed winding of magnetic conductive leads and electric leads. A magnetic core of the transformer adopts a stranded wire structure or a magnetic strip layered structure, and each magnetic conductive lead is insulated from the magnetic strip. A coil of the transformer adopts the distributed winding structure; the number of winding layers of the coil is much less than that of a traditional winding transformer, and the coil windings are uniformly distributed along the length direction of the magnetic core. The winding method of a primary winding and a secondary winding can coil in screw way along a surface of the magnetic core, and also can cross in two-dimensional grid structure along the surface of the magnetic core. A warp thread and a weft of the two-dimensional grid are a primary winding lead and a secondary winding lead respectively. The integral structure of the transformer can adopt a duplex or triple helix structure, as well as a disk-like structure or others. The transformer is mainly used for a signal transformer and a low power transformer working at low frequency, and the transformer has the main advantages of excellent heat emission and flexible design of the integral structure.

The invention discloses a battery charging circuit and charging method. The circuit comprises a charging power circuit, a charging control unit and a battery management system, wherein the battery management system is used for collecting terminal voltage data of a battery and is connected with the charging control unit through a communication interface; the charging control unit sends control signals to the charging power circuit according to the battery terminal voltage information; and the charging power circuit outputs a plurality of charging modes according to the control signals to chargethe battery. The method has the advantages that a charging machine is controlled to output different charging modes by adopting a mode of monitoring the terminal voltage in real time, so that the charging process is subjected to a small-current charging stage, a pulse charging stage and a constant-voltage charging stage separately; and according to the charging method which performs charging by different charging modes according to different terminal voltages, the battery can be better protected in the rapid charging process so as to prolong the service life.

The embodiment of the invention discloses a wireless network connection method and wireless broadband equipment, relating to the field of communication. In order to avoid overlarge temperature rise of miniaturized wireless broadband equipment at the same time of ensuring the normal work of the miniaturized wireless broadband equipment, the invention provides the following technical scheme comprising the steps of: acquiring the temperature and the data transmission rate of the wireless broadband equipment in a specified moment; and configuring a modulation mode according to the acquired temperature and transmission rate. The invention is suitable for wireless network communication.

The invention discloses a low-eddy-current-loss primary structure of a tooth groove type cylindrical linear motor. The low-eddy-current-loss primary structure comprises primary teeth, a primary yoke and a plurality of ring windings; the primary teeth and the primary yoke are separated components and are tightly sleeved together to form a primary iron core; one or more circular ring windings are embedded between every two primary tooth components; each annular primary tooth component is formed by arranging a plurality of tooth iron core blocks of the same specification in an array mode along the side length of an equilateral polygon, and each iron core block is formed by laminating silicon steel sheets in the circumferential direction; and the primary yoke component is formed by laminating silicon steel sheets along the motion direction of the motor, and each lamination is uniformly provided with a plurality of yoke shallow slots along the circumferential direction so as to block an eddy current path along the direction. According to the low-eddy-current-loss primary structure of the tooth groove type cylindrical linear motor of the invention, the primary iron core is combined by adopting a mode of tooth and yoke separation and lamination in different directions, so that the eddy current loss of the tooth groove type cylindrical linear motor can be effectively reduced, the efficiency of the motor is improved, and meanwhile, the motor can maintain relatively high thrust density.

The invention provides a constant-power output intelligent frequency modulating and speed regulating frequency conversion system and a control method thereof. The system comprises a master control device, a PWM control device, an AC / DC circuit, a DC / AC circuit, a protection circuit, a current detecting circuit and a voltage detecting circuit. The AC / DC circuit and the DC / AC circuit are connected with the PWM control device. The protection circuit is connected with the DC / AC circuit. The protection circuit, the current detecting circuit and the voltage detecting circuit are connected with the master control device. The DC / AC circuit, the current detecting circuit and the voltage detecting circuit are connected with a motor. Optimal efficiency can be achieved for the motor, the temperature rise of the motor and the temperature rise of a frequency converting control device are controlled, and therefore the constant-power output intelligent frequency modulating and speed regulating frequency conversion system and the control method have the advantages that energy can be saved, consumption can be reduced, and the service life of equipment can be prolonged.

The invention relates to a heating device for liquid heating. The heating device comprises a sealing support, a heating body, a water inlet and a water outlet. The sealing support and the heating body are in sealed connection. A cavity is defined by the sealing support and the heating body. A sealing body is arranged inside the cavity. A sealing water channel with the certain capacity is defined by the sealing body and the heating body. The sealing water channel is communicated with the external world through the water inlet and the water outlet. Liquid entering the water inlet is sealed and limited inside the sealing water channel and flows out of the water outlet along the sealing water channel. According to the heating device, the starting-up preheating waiting time can be shortened, the continuous water outlet temperature is stable, and the temperature of cast aluminum does not need to be maintained by means of heating during standby; meanwhile, the problems that water outlet steam and non-continuous water outlet are caused by gasification due to the water circulating problem caused by a gap between a liquid flow pass and a stainless steel thick film heater can be avoided.

The invention discloses a double-conductor equipment wire clamp, which comprises a wire clamp body and a crimping pipe, wherein the crimping pipe and the wire clamp body are connected in an interpolating mode. The invention adopts the crimping pipe interpolation welding, effectively increases the welding area and improves the overall strength of a welding seam. After the welding area is increased,the overall current carrying capacity of the wire clamp is improved, and the problem of excessive temperature rise of fittings caused by insufficient current carrying area is effectively prevented. In actual operation, an external force is transmitted from conductors to the crimping pipe, a distance between a direct force-receiving portion of the crimping pipe and a welding seam fixed point is just a distance in a non-crimping region, the force arm is short, the stress state is good, the wire clamp can prevent welding snap under the action of a higher external force, and long-term operation is guaranteed; the material of the double-conductor equipment wire clamp is changed from pure aluminum in the traditional scheme to aluminum alloy, thus the tensile property and bending resistance aregreatly improved; and water leaking holes can be formed directly under accumulative water positions of the fittings and are directly processed in a fitting production factory, the working procedures on the construction site are reduced, the installation efficiency is improved, and the fittings are effectively prevented from spalling due to the accumulative water.

The invention discloses a hydrogenation method for ethylene tar, which comprises the following steps of: performing fractional distillation on the ethylene tar by selecting a proper cutting point to obtain light and heavy fractions; making the light fraction contact a hydrogenation protecting catalyst, a hydrogenation refining catalyst, a hydrogenation carbon residue removing catalyst and a hydrocracking catalyst in turn, and reacting to obtain hydrocracking generated oil, wherein partial hydrocracking generated oil is circulated and mixed with the light fraction of the ethylene tar to enter a hydrogenation reaction area, and the rest hydrocracking generated oil is separated to form gasoline and diesel fractions; and making the heavy fraction contact a hydrogenation protecting catalyst, a hydrogenation carbon residue removing catalyst and a hydro-conversion catalyst preferably in turn, and separating to obtain gasoline and diesel fractions. In the method, according to composition characteristics of the light and heavy fractions of the ethylene tar, different hydrotreating schemes are selected, so that the ethylene tar is converted into fuel oil to the greatest extent, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved, the running period of the device is prolonged, full fractions of the ethylene tar are fully utilized and the added value of the ethylene tar is improved.

An exhaust purification system includes: an NOx reduction type catalyst; an MAF sensor; an SOx purge control unit that uses an air system control having an intake air amount feedback-controlled based on a target intake air amount and an injection system control for a target injection increase amount set based on the target intake air amount, and a fuel injection amount feedback-controlled based on the target injection increase amount; an SOx purge prohibition processing unit that prohibits an SOx purge control; and a warming mode control unit that open-loop controls an air system when the SOx purge control is prohibited, controls the fuel injection amount, and maintains the exhaust gas at a temperature. The SOx purge control unit executes the injection system control by switching the target intake air amount into an actual intake air amount when starting the SOx purge control after a warming mode control is ended.

The invention provides a motor. The motor comprises a rear bearing (1) and a brake, wherein a first bearing chamber (2) is arranged on the brake, and the rear bearing (1) is arranged in the first bearing chamber (2) in a limitation way. According to the motor, the cooling efficiency of the motor brake can be improved, and excessively high temperature rise of the motor is prevented.

The invention discloses a method for hydrotreating ethylene tar, which comprises the following steps of: performing fractional distillation on the ethylene tar by selecting a proper cutting point to obtain light and heavy fractions; making the light fraction contact a hydrogenation protective agent, a hydrogenation refining catalyst, a hydrogenation carbon residue catalyst and a hydrocracking catalyst in turn, reacting to obtain products, and separating the products to obtain gasoline and diesel fractions; and making the heavy fraction contact a hydrogenation protecting catalyst, a hydrogenation carbon residue removing catalyst and a hydro-conversion catalyst in turn to obtain hydro-conversion generated oil, wherein partial hydro-conversion generated oil is circulated to enter a hydrogenation reaction area, and the rest hydro-conversion generated oil is separated to form gasoline and diesel fractions. In the method, according to composition characteristics of the light and heavy fractions of the ethylene tar, different hydrotreating schemes are selected, so that the ethylene tar is converted into fuel oil to the greatest extent, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved, the running period of the device is prolonged, full fractions of the ethylene tar are fully utilized and the added value of the ethylene tar is improved.

The invention discloses a double-protection spray gun for a Maerz kiln. The double-protection spray gun comprises a stainless steel spray gun inner pipe, a stainless steel spray gun outer pipe and a ceramic protection layer of the stainless steel spray gun outer pipe. The stainless steel spray gun outer pipe covers the stainless steel spray gun inner pipe, and the stainless steel spray gun outer pipe and the stainless steel spray gun inner pipe are in hollow structures. By means of structural design that the stainless steel spray gun outer pipe in the hollow structure covers the stainless steel spray gun inner pipe in the hollow structure, overhigh temperature of the spray gun can be prevented, and strength of the stainless steel pipes are improved; by the ceramic protection layer of the stainless steel spray gun outer pipe, the spray gun can be protected from friction of materials; due to the fact that high temperature resistance and abrasion resistance of the ceramic protection layer are both better than those of the heat-resistant stainless steel pipes, service time of the spray gun for the Maerz kiln can be prolonged, damages are reduced, equipment cost is saved, and benefits are increased.

The invention discloses a distributed winding flexible transformer formed by the mixed winding of magnetic conductive leads and electric leads. A magnetic core of the transformer adopts a stranded wire structure or a magnetic strip layered structure, and each magnetic conductive lead is insulated from the magnetic strip. A coil of the transformer adopts the distributed winding structure; the number of winding layers of the coil is much less than that of a traditional winding transformer, and the coil windings are uniformly distributed along the length direction of the magnetic core. The winding method of a primary winding and a secondary winding can coil in screw way along a surface of the magnetic core, and also can cross in two-dimensional grid structure along the surface of the magnetic core. A warp thread and a weft of the two-dimensional grid are a primary winding lead and a secondary winding lead respectively. The integral structure of the transformer can adopt a duplex or triple helix structure, as well as a disk-like structure or others. The transformer is mainly used for a signal transformer and a low power transformer working at low frequency, and the transformer has themain advantages of excellent heat emission and flexible design of the integral structure.

The invention provides a water purifier. The water purifier comprises a casing, a water pump and a sound-absorbing device, wherein the water pump is arranged in the casing; the sound-absorbing deviceis arranged in the casing and near the water pump; the sound-absorbing device comprises a sound-absorbing shell and a microperforated panel; the sound-absorbing shell is provided with an opening, andthe opening faces the water pump; the microperforated panel covers the opening of the sound-absorbing shell; a through hole in the microperforated panel is communicated with a cavity of the sound-absorbing shell. The water purifier of the invention is characterized in that when an air unit in the through hole in the microperforated panel vibrates, energy of a sound field is dispersed, so that noise produced when the water pump vibrates is reduced and the purpose of reducing noise is achieved. Compared with sound-absorbing cotton, the microperforated panel is much more environmentally friendly;when the microperforated panel is installed on the water purifier, no harm is caused to human health; at the same time, the microperforated panel does not need to be connected through glue, and thus,reliability is high and stability is great; in addition, when the microperforated panel absorbs sounds, heat dissipation of the water pump is not affected, thereby avoiding the problem that the waterpump can not work normally because of over high temperature increase.

The invention provides a single stator framework, a chain type motor stator and a motor. The single stator framework comprises an inner ring wall, an outer ring wall and a connecting wall positioned between the inner ring wall and the outer ring wall; and the outer ring wall is arranged on the end plane of the stator iron core, and the end plane of the stator iron core is partially exposed from the peripheral side of the outer ring wall. According to the single stator framework, the chain type motor stator and the motor provided by the invention, the matching area between the stator iron coreand the stator framework can be reduced, the heat dissipation area of the stator iron core can be enlarged, heat dissipation of the motor stator can be better facilitated, and temperature rise of themotor is lowered.