4574 results about "Refrigeration plant" patented technology

The invention discloses a refrigeration equipment control method and system for a communication machine room, and relates to the field of heat dissipation control, and the method comprises the steps: obtaining machine room indoor temperature and equipment heating data of the communication machine room, and determining a preset refrigeration index according to the machine room indoor temperature and the equipment heating data; the operation parameters of the air conditioning equipment are adjusted to refrigeration operation parameters; when the temperature difference value between the indoor temperature of the machine room and the outdoor environment temperature is higher than a preset starting threshold value, starting parameters of the natural cold energy exchange unit are determined; the natural cold energy exchange unit is controlled to operate according to the starting parameters, and operating parameters of the air conditioning equipment are adjusted to be optimized operating parameters; determining a temperature change trend curve of the outdoor environment temperature based on the weather forecast information, and determining an optimization adjustment node according to the temperature change trend curve; and when the adjusting nodes are optimized, the starting parameters of the natural cold energy exchange unit and the operation parameters of the air conditioning equipment are adjusted. By implementing the application, the energy use of the refrigeration equipment in the communication machine room can be saved.

The utility model discloses a rotary compressor and refrigeration equipment, and relates to the technical field of compressors, the rotary compressor comprises a motor, the motor comprises a stator and a rotor, the stator comprises a stator iron core and a stator winding, the stator iron core comprises an annular yoke part and a plurality of tooth parts arranged in the yoke part, the plurality of tooth parts are spaced along the circumferential direction of the yoke part, and the stator winding is arranged in the yoke part; a stator groove is formed between every two adjacent tooth parts, the stator winding is wound in the stator grooves, and the rotor comprises a rotor iron core; the pump body part comprises a crankshaft, an upper bearing and a cylinder; the number of the stator grooves is Q, the number of poles of the rotor is P, the maximum outer circle contour radius of the rotor core is R1, the maximum outer circle contour outer diameter is D1, D1 = 2 * R1, the outer diameter of the part, matched with the upper bearing, of the crankshaft is D2, GCD (Q, P) is the largest common divisor of Q and P, and GCD (Q, P) is larger than or equal to # imgabs0 # 5 and smaller than or equal to 6. The rotary compressor disclosed by the utility model is beneficial to improving the energy efficiency of the rotary compressor and reducing the electric energy consumption during operation.

The utility model relates to the technical field of household appliances, and provides a door body assembly and refrigeration equipment. The door body assembly comprises a box door rotationally connected to a box body and suitable for opening or closing a storage space of the box body. And the door plate is arranged on the outer side of the box door in a sliding manner. The first driven sliding door mechanism and the driving sliding door mechanism are arranged on the box door in a non-coaxial mode, and the driving sliding door mechanism is configured in the mode that in the opening or closing process of the box door, the traction mechanism drives the driving sliding door mechanism, so that the driving sliding door mechanism drives the door plate to move relative to the width direction of the box door; the first driven sliding door mechanism is configured to cooperatively guide the door plate to move relative to the box door. According to the door body assembly, the driving sliding door mechanism is arranged on the box door, and the driving sliding door mechanism can drive the door plate to slide relative to the box body under the auxiliary cooperation of the first driven sliding door mechanism, so that the door plate can avoid obstacles in the closing or opening process of the box door.

The invention relates to the technical field of refrigeration equipment control, in particular to an air conditioner control method and system. Firstly, a refrigerant flow prediction model is established by combining the advantages of LSTM and XGBoost, a time sequence and static characteristics are accurately captured, prediction precision and system adaptability are improved, reliable data support is provided for intelligent regulation and control, refrigerant distribution is optimized, energy efficiency is improved, and energy consumption is reduced; secondly, the opening degree of an electronic expansion valve and the frequency of a compressor are controlled in a feedforward mode through a multivariable cooperative control algorithm, the load and the flow are accurately matched, the system efficiency is improved, it is ensured that all assemblies operate in a coordinated mode, energy waste is reduced, and stability and comfort are optimized; finally, PID feedback control is combined, the frequencies of the electronic expansion valve and the compressor are finely adjusted in real time, the optimal energy efficiency and stability of the system are ensured, closed-loop control is achieved, the temperature control precision is further improved, fluctuation is reduced, and the energy efficiency is optimized.

The invention relates to the technical field of intelligent control of refrigeration equipment, in particular to an artificial intelligence-based screw compressor running state control system and method, which comprises a signal acquisition unit, a disturbance identification unit and a compressor control unit, the signal acquisition unit acquires a refrigeration house door opening and closing state time sequence signal and three-dimensional temperature field change data, the disturbance identification unit synchronously locks the door opening moment through a timestamp, divides a core influence area and a stable conduction area, analyzes the correlation between the temperature change rate and the door opening angle and the temperature fluctuation amplitude, and determines the temperature change rate of the door opening angle. And the door opening disturbance or equipment abnormity identification factor is output, and the compressor control unit executes differential regulation according to the door opening disturbance or equipment abnormity identification factor, so that the problems of disturbance misjudgment and regulation rigidity in traditional control are solved, and the operation stability and energy consumption control precision of the compressor are improved.

The invention provides a distributed energy-saving control method and system for refrigeration equipment, and the method comprises the steps: obtaining physical parameters in an environment, fusing the preprocessed data, and generating an environment thermal field model through the mapping of an environment thermal field; according to a time sequence input sequence of the environment thermal field model, obtaining corresponding temperature field time sequence data, performing correction processing on the temperature field time sequence data, generating corresponding future temperature distribution, and forming a predicted future thermal field model; temperature deviation calculation analysis is conducted on future temperature distribution, the cooling capacity demand and the global cooling capacity demand of unit volume air are obtained, and an optimal refrigeration power distribution scheme is designed by minimizing the total energy consumption and meeting the power distribution constraint; and executing the optimal refrigeration power distribution scheme, determining the overall load balance degree of the system according to the current load ratio of each device, performing global optimization scheduling according to the overall load balance degree, and generating a final refrigeration device power distribution scheme.

The invention belongs to the technical field of refrigeration, and discloses an intelligent control method and system for small refrigeration equipment. On one hand, working condition parameters and operation parameters are monitored through various sensors, and a multi-dimensional database is established; establishing an agent model of the refrigeration equipment based on the multi-dimensional database, and performing intelligent matching control on the operation of a compressor and a fan in combination with real-time monitoring data; and on the other hand, a bid evaluation index of the period COPcyc is established to comprehensively measure energy loss in the refrigeration period and the defrosting period, the indicated defrosting amount is determined, and defrosting is started when the accumulated frosting amount reaches the indicated defrosting amount. On the basis that the refrigeration requirement of the refrigeration space is met, the temperature control precision in the refrigeration space is improved by optimizing part operation, inhibiting frost layer growth and starting defrosting according to needs, the operation energy consumption of the refrigeration equipment is reduced, and a new thought and method are provided for precise temperature control and energy conservation of the refrigeration equipment.

The invention belongs to the technical field of dry filters, and particularly relates to an easy-to-clean dry filter for refrigeration equipment, the easy-to-clean dry filter comprises a shell, a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are mounted on two sides of the shell, two convex plates are mounted in the shell, mesh plates I are slidably mounted on the two convex plates respectively, spacer sleeves are mounted on the mesh plates I, and the spacer sleeves are mounted on the mesh plates II; the area between the two protruding plates is divided into a transmission cavity and a drying cavity through the spacer sleeve, and a speed reduction tooth set is installed in the transmission cavity and connected with the first mesh plate. After the air cylinder is started, under the condition that a sliding rod on the second mesh plate is in sliding fit with a chute, the first mesh plate drives the second mesh plate to rotate, so that through holes in the second mesh plate gradually coincide with through holes in the first mesh plate, the flow speed of a refrigerant passing through the second mesh plate and the first mesh plate is increased, and meanwhile, under the action of a speed reduction tooth set, the refrigerant is prevented from falling off. And the space between the drying cavities is gradually increased, so that the refrigerant passes through each part of the drying agent, and small pulverized particles of the drying agent are brought out.

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of permanent magnet motors, stator teeth and stator slots on the inner circumference of a stator core are alternately distributed, windings are arranged in the stator slots, the number of the stator slots is Q, the diameter of the maximum outer circle contour of the stator core is D1, the diameter of the maximum circle contour defined by the slot bottoms of the plurality of stator slots is D2, the diameter of the minimum inner circle outline of the stator core is D3, the rotor is rotatably mounted in the stator, the number of pole pairs of the rotor is P, and GCD (Q, P) * (D1-D2) / 2) / ((D1-D3) / 2) is greater than or equal to 1.4 and less than or equal to 2.6, and ((D2-D3) / 2) / (D3 / 2) is greater than or equal to 0.3 and less than or equal to 0.42, and GCD (Q, P) is the largest common divisor of Q and P. The technical scheme provided by the invention aims at balancing the rigidity and temperature of the stator, and ensuring the low-noise operation of the motor and the operation reliability of the motor at the same time.

The invention discloses an efficient heat exchange structure of energy-saving refrigeration equipment, and relates to the technical field of heat exchangers. Comprising a heat exchanger body, the heat exchanger body comprises a heat exchanger support, and a plurality of heat exchange pipes are arranged in the heat exchanger support; and a plurality of heat exchange fins are arranged on the heat exchange tube. Through the design of the gradient-thickness heat exchange fins and the synergistic effect of the gradient-thickness heat exchange fins and the super-hydrophobic coating and the high-temperature heat insulation coating, random nucleation of condensate water is restrained, condensate water is preferentially formed by the condensation collection grooves in the outer edges of the heat exchange fins due to low heat resistance and fast heat dissipation, and the heat dissipation efficiency is improved by combining the annular condensation collection grooves and millimeter-level flow guide burrs. The guide plate and the Y-shaped guide rib I are combined, a hydrophilic coating II is used for adsorbing water flow, a hydrophobic coating II is matched for blocking airflow interference, and the condensate water is ensured to quickly flow into a bottom condensate water collecting box along a preset path; and the influence of the condensate water on the heat exchange tube is avoided.

The invention discloses an efficient refrigerating machine room performance optimization method and device, and relates to the technical field of intelligent energy-saving optimizing.The efficient refrigerating machine room performance optimization method comprises the steps that operation data of refrigerating equipment are collected through various sensors and preprocessed; based on the preprocessed operation data, constructing an MT-LSTM model to predict a future cold load demand, and generating a cold load demand prediction value; on the basis of the cold load demand predicted value, generating an optimal scheduling strategy through an NSGA-II optimization algorithm; and according to the optimal scheduling strategy, equipment starting and closing and load proportion distribution are executed through IoT, operation data are monitored in real time, and the operation state of the refrigeration equipment is dynamically adjusted and optimized. According to the method, the future cold load demand is predicted by constructing the MT-LSTM model, and accurate demand prediction is realized.

The embodiment of the utility model discloses a motor, a rotary compressor and refrigeration equipment, the motor is characterized in that a rotor is installed in a stator, the stator comprises a stator iron core and a stator winding, the stator iron core comprises a yoke part and a plurality of tooth parts, the yoke part is annular, the plurality of tooth parts are distributed at intervals in the circumferential direction of the yoke part, and the stator winding is wound on the stator iron core. Two adjacent tooth parts and the yoke part jointly define a stator groove, and the stator winding is arranged in the stator groove; wherein the maximum distance between the outer wall of the yoke part and the circle center of the stator is R1, the maximum distance between the bottom of each stator groove and the circle center of the stator is R2, the number of the stator grooves is Q, and the number of poles of the rotor is P. The motor provided by the embodiment of the utility model can improve the structural strength of the motor, ensure the operation reliability of the motor, prolong the service life of the motor, and improve the reliability of the motor. The noise generated during the operation of the motor is reduced, the user experience can be improved, the use effect is better, and the application range is wider.

The invention provides a temperature control system for a rechargeable catering storage platform, and belongs to the technical field of temperature control. The system comprises an acquisition module used for acquiring and acquiring basic parameter data of a catering storage platform, the basic parameter data including internal temperature data, environment humidity parameters, power parameters of heating equipment and refrigeration equipment, energy related parameters of the platform and historical state data of a heat preservation cover body of the catering storage platform; the control module is used for calculating energy revenue and expenditure according to the basic parameter data and selecting a corresponding control strategy; and the heating and refrigerating execution module is used for regulating and controlling the heating equipment and the refrigerating equipment according to the selected control strategy. According to the invention, the problems of temperature control misalignment and out-of-control energy consumption caused by frequent access and sudden environment change are effectively solved, and accurate temperature control and efficient energy management in a complex scene are realized.

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.

The present application discloses a refrigeration device, wherein the ice moving device includes a box body, a first refrigeration compartment, a second refrigeration compartment, an ice-making assembly, an ice-taking assembly, and an ice-moving assembly. The ice-making assembly is arranged in the first refrigeration compartment; the ice-taking assembly is arranged on the second door body; the ice-moving device includes an ice-moving channel, an ice-moving part, and an ice-moving assembly. The ice-moving part is arranged in the first refrigeration compartment, and the ice-moving channel includes a first sub-channel and a second sub-channel connected in sequence. The second sub-channel is arranged in the second door body and connected to the ice-taking assembly. The first sub-channel is connected to the ice-moving part, and the ice-moving assembly drives the ice cubes from the ice-moving part to the ice-moving channel. The refrigeration device of the present application avoids occupying the space of the second refrigeration compartment by making and storing ice in the second refrigeration compartment. By arranging the second sub-channel in the second door body, the internal space of the second refrigeration compartment is not occupied, thereby further improving the volume ratio of the refrigeration device. The refrigeration device also includes a sealing assembly that can isolate the first refrigeration compartment and the second refrigeration compartment when ice is not being moved.

The invention provides a self-lubricating crankshaft and refrigeration equipment, and relates to the field of refrigeration equipment, an annular concave main shaft oil storage groove is formed by main shaft part sections where oil storage section oil grooves are distributed, the oil storage space is increased, and the lead of the oil storage section oil grooves is smaller than that of other sections of spiral oil grooves, so that the speed of refrigerating machine oil is slower during backflow; the eccentric oil storage groove formed in the end face of the connecting rod shaft is communicated with the eccentric section oil groove through the oil outlet hole, the function of storing the refrigerating machine oil is achieved, and when restarting is conducted after shutdown, the stored refrigerating machine oil can be put into use rapidly and can be supplied to the eccentric part and the main shaft part in time to provide initial lubrication. Dry friction at the starting moment is reduced, the reliability of the crankshaft during starting is improved, and poor lubrication caused by insufficient oil supply is avoided.

The invention provides a control method and device, refrigeration equipment, electronic equipment and a readable storage medium, and relates to the technical field of refrigeration equipment. When the chamber temperature is larger than the preset temperature threshold value, the inverter compressor is controlled to be started, and the inverter compressor is made to reduce the chamber temperature at the first rotating speed; when the chamber temperature is smaller than or equal to the preset temperature threshold value, the inverter compressor is controlled to stop, the chamber temperature rises under the action of the environment temperature till the chamber temperature is larger than the preset temperature threshold value again, and one-time circulation is formed; the first rotating speed is determined based on the power-on duration ratio in the last circulation. According to the technical scheme, the first rotating speed of the next cycle is dynamically adjusted based on the startup duration ratio in the previous cycle, so that the output power of the inverter compressor is precisely matched with the refrigeration requirement, the inverter compressor operates under the working condition of the optimal rotating speed or operates under the working condition close to the optimal rotating speed, energy consumption of refrigeration equipment is reduced, and the refrigeration efficiency is improved. And the energy-saving effect is better.

The invention discloses a radiation refrigeration cement-based material with a metasurface and a preparation method and application thereof.The radiation refrigeration cement-based material with the metasurface is prepared from, by mass, cementitious material particles, water and an additive according to the mass fraction ratio of (1-2): (0.4-0.6): (0.01-0.02). Bubbles are guided to be spontaneously arranged and grow on the surface of cement-based material slurry which is not completely hardened, complete hardening of a matrix and stability of surface microbubbles are finally achieved by combining the rheological property of the cement-based material, the super-surface cement-based material which is excellent in optical performance and provided with orderly-arranged cavities in the surface is finally obtained, passive cooling can be efficiently achieved, and the service life of the super-surface cement-based material is prolonged. Use of active refrigeration equipment such as an air conditioner is reduced, and the system is suitable for being applied to building walls which are under sun irradiation for a long time in medium and low latitude areas and have cooling requirements, contributes to reduction of building energy consumption, and realizes low-carbon sustainable development.

The utility model relates to an oil way system, a cascade unit, energy-saving equipment and refrigeration equipment, the oil way system comprises a first heat exchanger, a first oil tank and a second oil tank, a first channel and a second channel are arranged in the first heat exchanger, and heat exchange can be conducted between the first channel and the second channel; two ends of the first oil tank are respectively communicated with the first channel to form a first circulating oil path; the two ends of the second oil tank communicate with the second channel to form a second circulating oil way. According to the oil way system, when the oil temperature in the first oil tank and the oil temperature in the second oil tank have a large temperature difference, the oil temperature of one oil tank is too low, and the oil temperature of the other oil tank is too high or too high, heat exchange between the two circulating oil ways can be achieved through the first heat exchanger; and therefore, the conditions of too low oil temperature and too high oil temperature are relieved synchronously, and normal operation of an oil way can be guaranteed. No extra heating assembly or oil cooling assembly is needed, and the power consumption and the manufacturing cost of the oil way system can be obviously reduced.

The invention discloses a stator assembly, a compressor and refrigeration equipment, and relates to the technical field of motors. The stator assembly comprises a stator core formed by stacking a plurality of amorphous alloy sheets, the stator core comprises a yoke part, a tooth part and a shoe part, and the stator core is formed by stacking a plurality of amorphous alloy sheets, so that the iron loss of the stator assembly can be reduced. For a motor, the area of a stator slot is expected to be as large as possible to increase the winding wire diameter so as to reduce copper loss, and the smaller the minimum width of a tooth part is, the better is, but the smaller the width of the tooth part is, the more likely to cause magnetic field saturation. In order to reasonably design the minimum tooth width of the tooth part so as to reduce the problem of magnetic voltage drop increase caused by magnetic field saturation, the minimum tooth width Wt of the tooth part is set in a range of 2piD / 9Q to 2piD / 3Q, so that the area of the stator slot can be effectively increased, the problem of magnetic voltage drop increase caused by magnetic field saturation can be improved, the magnitude of current can be reduced, and the service life of the stator slot can be prolonged. The working efficiency of the motor is improved.

The refrigerant charging and discharging device for the refrigeration equipment comprises a discharging mechanism, a charging mechanism and a quasi-discharging detection mechanism, the quasi-discharging detection mechanism comprises a transfer box, the end, away from a vacuum pump, of a discharging pipeline communicates with the transfer box, and a detection air storage cylinder is arranged above the transfer box; a detection outlet pipe is communicated between the detection air storage cylinder and the transfer box, a detection piston plate in sliding sealing connection with the detection air storage cylinder is arranged in the detection air storage cylinder, an elastic lifting rope is fixedly connected between the detection piston plate and the inner wall of the top end of the detection air storage cylinder, and one end, away from the discharge pipeline, of the transfer box is communicated with a continuous discharge pipe; according to the refrigerant charging and discharging device, before the refrigerant is discharged officially, discharging simulation detection can be carried out firstly, so that the normal sealing performance of the discharging mechanism is ensured, the refrigerant leakage phenomenon in the refrigerant discharging process can be effectively avoided, and the safety and reliability of the device are greatly improved.

The utility model relates to refrigeration equipment, which comprises a box body, a refrigeration chamber and an evaporation bin are formed in the refrigerator body; an evaporator is arranged in the evaporation bin; the drain pipe is arranged in the box body, and the upper end of the drain pipe is communicated with the evaporation bin; the water receiving box is arranged below the drainage pipe, and a water receiving cavity is formed in the water receiving box; the lifting mechanism comprises a lifting cover and a driving part; the lifting cover is arranged below the drainage pipe and connected with the driving end of the driving part, and the driving part can drive the lifting cover to ascend or descend so that the top face of the lifting cover can block or open the lower end opening of the drainage pipe. According to the refrigeration equipment, when water vapor in the water receiving cavity flows back to the evaporation bin through the drainage pipe, the water vapor flowing back to the evaporation bin can be prevented from frosting again on the evaporator, the frosting amount on the evaporator can be reduced, the starting interval of a defrosting program of the evaporator can be prolonged, and the defrosting efficiency of the evaporator is improved. And therefore, the power consumption of the refrigeration equipment can be reduced.

The utility model provides a door body and refrigeration equipment, the door body comprises a door body, a vertical beam which is connected with the door body and rotates around an axis, a connecting piece which connects the door body and the vertical beam, and an elastic piece of which two ends are respectively fixed on the vertical beam and the connecting piece, and the elastic piece extends or contracts along with the rotation of the vertical beam. According to the door body, the vertical beams and the connecting pieces are connected through the elastic pieces, on one hand, the influence of the diameter size and the material of the torsional spring on springback does not need to be considered, on the other hand, the elastic pieces do not need to penetrate through a fixing structure for fixing, and disassembly is convenient.

The invention relates to the technical field of refrigeration houses for storage, and provides a refrigeration house for fruit storage and a storage method.The refrigeration house for fruit storage comprises a refrigeration house body, a plurality of independent refrigeration house box bodies are arranged in the refrigeration house body, refrigeration equipment is installed in the refrigeration house body, and the air inlet end of the refrigeration equipment communicates with the outside through a pipeline; the output end of the refrigeration equipment communicates with a ventilation pipeline, the multiple storage racks are arranged in each refrigeration storage box, the ventilation box bodies are fixedly installed in each storage rack, each ventilation box body is provided with a ventilation structure, the air uniformizing assembly is installed at the top of each refrigeration storage box body, and the air uniformizing assembly is connected with the storage racks. By means of the technical scheme, the technical problems that in the related technology, when fruits stored in a refrigeration house are taken out, the phenomenon of local cold damage is likely to occur in the temperature returning process, temperature returning is difficult to conduct on part of fruits in batches according to the requirements, and consequently high-value fruits are difficult to supply according to the requirements in a graded mode are solved.

The invention discloses a motor, a compressor and refrigeration equipment, the motor comprises a stator assembly and a rotor assembly, the stator assembly comprises a plurality of stator punching sheets stacked in the axial direction, the rotor assembly is located at the radial inner side of the stator assembly, and the rotor assembly comprises a plurality of rotor punching sheets stacked in the axial direction. The rotor punching sheet is provided with a plurality of magnetic steel groove groups which are circumferentially arranged at intervals, each magnetic steel groove group is internally provided with magnetic steel with the same magnetic pole, the magnetic poles of the magnetic steel in two adjacent magnetic steel groove groups are opposite, and the radial outer side of each magnetic steel groove group is provided with a magnetic barrier group. And each groove is arranged between two adjacent magnetic steel groove groups, so that the distribution of a magnetic field is changed, the magnetic field is more uniform, the iron loss is reduced, the torque is improved, the stator saturation is relieved, the rotor magnetic field is fully utilized, harmonic waves are reduced, and the efficiency is further improved.

The broiler processing refrigeration warehouse comprises a refrigeration warehouse body, a warehouse door is installed on the surface of the refrigeration warehouse body, a controller is arranged on one side of the warehouse door, a gas tank is arranged outside the refrigeration warehouse body, a transmission device is arranged on the other side of the warehouse door, and a temperature sensor is installed beside the transmission device; an in-warehouse bin is formed in the refrigeration warehouse, a partition layer is installed in the in-warehouse bin, a door groove is formed in the wall of the in-warehouse bin, a ladder stand is erected on the partition layer, refrigeration equipment is installed in the in-warehouse bin, and a refrigeration evaporator is placed beside the refrigeration equipment. In the using process, the transmission device is started, and the transmission shaft drives the linkage screw to rotate; the linkage screw drives the first cam on the linkage screw to rotate, then the second cam is pushed through the linkage effect, the movement of the second cam promotes the bracket plate to do vertical displacement along the limiting sliding rod, and finally the scraping cover is driven to scrape and remove ice blocks on the fins. The process can effectively avoid the problem that the heat exchange efficiency is greatly reduced due to the fact that ice accumulated between the fins hinders airflow.

The utility model discloses a motor, a compressor and refrigeration equipment, the motor comprises a stator, the stator comprises a stator iron core and a winding, the stator iron core is provided with a plurality of stator teeth, the winding is wound on the stator teeth, and a stator slot is defined between two adjacent stator teeth; the rotor is arranged in an inner cavity of the stator, the rotor comprises a rotor iron core and magnets, the rotor iron core is provided with a plurality of installation grooves, the installation grooves are arranged at intervals in the circumferential direction of the rotor iron core, the magnets are suitable for being installed in the installation grooves, the number of stator grooves is Q, the number of poles of the rotor is 2p, the phase number of the winding is m, the outer diameter of the stator is D1, the inner diameter of the stator is D2, and GCD (Q, G, D) is smaller than Q; 2p) is the largest common divisor of the number of the stator slots and the number of the poles of the rotor and satisfies Q / (2pm) lt; 1, 11.2 < = (D2 / D1) (GCD (Q, 2p)) 2 < = 16.5. According to the motor provided by the embodiment of the utility model, the power density of the motor can be improved and the vibration noise of the motor can be reduced by limiting the largest common divisor of the stator slots and the rotor poles and the inner and outer diameters of the stator.

The invention discloses an electric field fresh-keeping device, an electric field control method, a controller and refrigeration equipment, in the fresh-keeping process of food materials, under the condition that an air door is opened, a power supply is controlled to apply first voltage to a plate-shaped electrode and a needle-shaped electrode, the plate-shaped electrode provides an electric field to keep the food materials fresh, and meanwhile, the point of the needle-shaped electrode discharges to ionize air; when the air door is closed, the power supply is controlled to apply a second voltage to the plate-shaped electrode and the needle-shaped electrode, so that the food materials in the storage assembly can be sterilized and deodorized, and the electric field fresh-keeping function and the ionization sterilization function can be realized; and when the air door is closed, the power supply is controlled to apply a second voltage to the plate-shaped electrode and the needle-shaped electrode, so that the food materials can be sterilized. The plate-shaped electrode and the needle-shaped electrode provide an electric field to keep food fresh, and the electric field fresh-keeping function is achieved, so that the electric field fresh-keeping device can achieve electric field fresh-keeping and ionization sterilization through one electric field assembly, and can work in combination with the opening and closing state of the air door to achieve the effects of fresh-keeping, sterilization and odor removal.

The invention relates to an evaporator defrosting system and a defrosting control method. The system is applied to the refrigeration equipment with a compressor, the system comprises an evaporation coil, a liquid storage device, the compressor, a heater and a controller, and the liquid storage device comprises an upper connecting port and a lower connecting port; an outlet of the evaporation coil is configured to be connected to the upper connector from the upper part of the liquid storage device; the compressor is connected to an inlet of the evaporation coil and used for providing power for refrigerant circulation. The heater is arranged around or below the body of the evaporation coil; the controller is used for controlling the heater to heat the evaporation coil, so that the liquid refrigerant generates bubbles with liquid in a pipe opening of the evaporation coil; and controlling the compressor to extract the liquid-carrying bubbles accumulated at the pipe orifice of the evaporation coil pipe.

The utility model provides a two-stage jet flow reflection mixing flow guide distributor, a heat exchange device and refrigeration equipment. The two-stage jet flow reflection mixing flow guide distributor comprises a cavity, a liquid inlet pipe, a two-stage jet flow reflection mixing component and a plurality of branch pipes. The two-stage jet flow reflection mixing component comprises a first-stage reflection mixing plate, a second-stage jet flow hole plate and a second-stage reflection mixing plate which are sequentially distributed in the cavity at intervals in the flowing direction of the refrigerant. The first-stage reflecting and mixing plate is distributed opposite to the inflow end of the cavity so as to reflect and mix a refrigerant injected into the cavity from the liquid inlet pipe, and a plurality of overflowing holes are formed in the first-stage reflecting and mixing plate. The second-stage jet flow hole plate and the first-stage reflection mixing plate define a jet flow cavity, and a second-stage jet flow hole is formed in the jet flow cavity. The second-stage reflection mixing plate is opposite to the second-stage jet flow holes and is provided with a plurality of flow guide holes of which the number is the same as that of the shunting branch pipe holes; and each flow guide hole is basically coaxial with the corresponding shunting branch pipe hole. And the plurality of branch pipes are respectively welded and connected in the plurality of shunting branch pipe holes in the outflow end of the cavity.