129results about How to "Guaranteed energy efficiency" patented technology

The invention discloses an air conditioner and a combined control method for a compressor in the air conditioner and an outdoor draught fan. The combined control method comprises the following steps that a user control instruction is received; a motor of the compressor is controlled according to the user control instruction so as to adjust the rotating speed of the motor of the compressor; the current rotating speed of the motor of the compressor is acquired, and the target rotating speed of a motor of the outdoor draught fan is worked out according to the current rotating speed of the motor of the compressor; and the motor of the outdoor draught fan is controlled according to the target rotating speed of the motor of the outdoor draught fan so that the rotating speed of the motor of the outdoor draught fan can be matched with the rotating speed of the motor of the compressor, and combined control of the compressor and the outdoor draught fan is achieved. The mismatching degree of the compressor and the outdoor draught fan is effectively decreased, and the energy efficiency of the air conditioner is ensured. In addition, the combined control method is simple and easy to achieve and has high universality and practicality.

The invention relates to an outer drying steam triple-effect heat exchange system. A flow divider is arranged in the liquid phase space of a water-bath-type saturated steam generator, and a steam discharge pipeline of the flow dividier is sequentially provided with a steam water separator and a steam drying heat exchanger; overheated steam enters the flow divider through a pressure control valve; wet saturated steam from the saturated steam generator is heated into dry saturated steam by overheated steam; the dry saturated steam enters a main steam heat exchanger and becomes high-temperature condensation water after materials are heated for the third time; flash steam of the high-temperature condensation water heats the materials in the flash steam heat exchanger for the second time; condensed flash steam enters the condensation water heat exchanger; the condensation water in the high-temperature condensation water continuously releases sensible heat to heat the material for the first time; the condensation water after temperature reduction enters a water collecting tank, and is pumped into the saturated steam generator by a water supplying pump; and the aperture of the pressure control valve is regulated by a PLC (programmed logic controller) according to the material outlet temperature. The system achieves cascading utilization of steam heat energy, guarantees that the steam heat energy can be used up, and improves the energy efficiency.

The invention discloses an air-conditioning system. The air-conditioning system comprises a compressor with two interdependently compressing cylinders, a reversing unit, an indoor heat exchanger, a first throttling unit, a gas-liquid separator, a second throttling unit and an indoor heat exchanger which are sequentially connected to form a refrigerant circulating loop and is characterized by further comprising a controller, the controller calculates the refrigerant throttling degrees of the first throttling unit and the second throttling unit according to the operating parameters of the air-conditioning system and determines the refrigerant throttling degree of the second throttling unit or the first throttling unit according to the proportion value between the first throttling unit and the second throttling unit. The invention further discloses a control method of the air-conditioning system. The operating energy effect of the air-conditioning system can be ensure, and the air-conditioning system can rapidly meet the operating demand.

The invention relates to a membrane protecting coating for preventing a dendrite short circuit of a metal negative electrode and a preparation method thereof. Slurry is prepared through adding an adhesive and a solvent which have adhesivity and ion adsorption action to a carbon material or a high polymer which has strong chelation action and strong adsorption action but does not have adhesivity on metal ions; and the protecting coating coats or sprays the single surface or double surfaces of a battery membrane, and the surface and the edge are covered with the protecting coating, so that the process complexity and dangerousness of direct modification of the high-activity metal surface are avoided, and the effect of preventing the short circuit of the battery due to the fact that metallic dendrites puncture the membrane is achieved. The preparation method is simple and feasible, and is widely applied to a secondary battery system which directly takes high-capacity and high-activity metal as the negative electrode; the charge-discharge efficiency of the metal negative electrode is improved; and a guarantee is provided for long-cycle life of the battery.

The invention discloses a multi-ion-field indoor air purifier. The multi-ion-field indoor air purifier comprises a power source, a suction opening, a filter, a plasma reactor, a suction device and an exhaust port. The plasma reactor comprises a plurality of pole plates which are arranged in a layering manner, and the positive electrodes and the negative electrodes of the pole plates are arranged in a staggered manner. The polarities of the vertically adjacent pole plates are opposite. After all sets of electrodes of the multi-ion-field low-temperature plasma reactor form ion field units, a plurality of ion fields are formed among the ion field units. Under the same electric power, the efficiency of the reactor is improved in a multiplied manner, and energy consumption is saved in a multiplied manner. An upper-suction and lower-exhaust air processing structure is adopted, the height of the machine type is more than 1,000 mm and is close to the suspension height of polluted air, the phenomenon of the air short circuit is avoided, and the indoor space is rapidly purified completely. An airflow channel of the multi-ion field low-temperature plasma reactor is designed to be of the structure vertically circulating with the multi-hole pole plates, and the circulation amount is large while blockage cannot happen. The airflow channel can be easily taken out to be cleaned and recycled, and the using cost is greatly reduced.

The invention discloses a high energy efficiency power control method which takes energy harvest into consideration in an ultra-dense network. The method comprises following steps of 1, setting a double-layer heterogeneous network scene; 2, distributing subchannels; 3, carrying out initial power distribution on each subchannel of a macro base station and each home base station; 4, judging whether the power distribution of all home base stations is converged or not, or whether the number of iterations exceeds an upper limit or not; 5, solving the optimum transmitting power distribution of the home base stations; 6, stopping iteration of this time; finishing distribution of wireless resources of each home base station; and waiting for scheduling of next time. According to the method, the QoS demands of the users of the home base stations are taken into consideration, and moreover, the energy efficiency of the heterogeneous network is improved greatly by using an energy harvest technique.

The invention provides a constant-temperature constant-humidity air conditioner. The constant-temperature constant-humidity air conditioner comprises an indoor unit, an outdoor unit and a control system, and further comprises a compressor, an outdoor heat exchanger forming a condenser of the air conditioner, and an indoor heat exchanger forming an evaporator of the air conditioner, which are sequentially communicated in a circulating mode, wherein an indoor re-heating heat exchanger which is in parallel connected with the outdoor heat exchanger is further arranged between the compressor and the indoor heat exchanger; and the indoor re-heating heat exchanger comprises a micro-channel heat exchanger. The indoor re-heating heat exchanger comprises the micro-channel heat exchanger, is relatively small in inside volume and free of influence on refrigerant circulation quantity while being switched between two modes of the air conditioner due to low occupied refrigerant amount, thereby guaranteeing the energy efficiency and the cooling capacity of the air conditioner. An electronic expansion valve is arranged behind each of the outdoor heat exchanger and the indoor re-heating heat exchanger; by virtue of control of the double electronic expansion valves, heat quantity of the outdoor heat exchanger and the indoor re-heating heat exchanger is intelligently distributed, thereby precisely controlling indoor refrigerating capacity and achieving a purpose of precisely controlling the indoor environment temperature.

The invention discloses an energy efficiency optimization method based on a full-duplex bidirectional relay D2D network. The method comprises a cellular user, a pair of full-duplex D2D users multiplexing the frequency band of the cellular user, and one full-duplex bidirectional relay user assisting with D2D communication. By use of a double-layer alternative iteration optimization algorithm, the transmission power of the cellular user and the full-duplex D2D users and the amplification gain of the full-duplex bidirectional relay user can be dynamically adjusted, the influences exerted by interference between the users and self-interference of the full-duplex users on network performance are effectively alleviated, and the energy efficiency of a system can be maximized under the constraints of minimum frequency spectrum efficiency. During communication of the cellular user, the full-duplex relay-assisted D2D users can share the frequency band of the cellular user for direct communication, by use of cellular network basis configuration, same-time same-frequency D2D communication and cellular communication are realized, power consumption of the cellular communication is reduced, the energy efficiency of a cellular network is effectively improved, and the method is applied to communication environment with requirements for high density and low power consumption.

The invention discloses a control method for air conditioner defrosting and belongs to the technical field of air conditioners. The control method comprises the steps that a first temperature variablequantity of an external coil within the standard defrosting interval time is obtained; according to the first temperature variable quantity, the defrosting interval compensation time is determined; and when the accumulated time after the defrosting process of the last time of an air conditioner is finished reaches the sum of the standard defrosting interval time and the defrosting interval compensation time, the air conditioner is controlled to start the defrosting process. According to the control method for air conditioner defrosting, the time interval between two times of the continuously-executed defrosting processes is determined according to the temperature variable quantity, detected by a defrosting sensor, of the external coil, thus, the change, caused by the factors such as air conditioner operating and the external environment, of the air conditioner frosting situation can be considered so that the time interval of two adjacent times of the defrosting processes can meet thepractical defrosting need, control is more accurate, and the operating energy efficiency of the air conditioner under the severe cold and low-temperature weather is ensued.

The invention discloses an energy efficiency optimization method suitable for a large-scale multiple-input-multiple-output system. The method comprises the steps: firstly creating an energy efficiency optimization model of a joint optimization base station antenna number, an antenna subset and transmission power; secondly proposing a low-complexity iterative search method, supposing that the base station antenna number is M, and carrying out the traversal of the base station antenna number from one to M; thirdly selecting one antenna number and then employing a suboptimal antenna selection algorithm based on a channel matrix norm for the selection of an antenna subset, wherein the energy efficiency is a quasi-concave function of transmission power after the antenna number and the antenna subset are determined, so the optimal transmission power can be solved through employing a convex optimization theory, and at this moment the energy efficiency corresponding to the optimal transmission power is the optimal energy efficiency under the current antenna number; finally comparing the energy efficiencies of M times, and obtaining the optimal energy efficiency of the system, the optimal antenna number, the antenna subset, and the transmission power. The method can reduce the cost of the system while improving the energy efficiency.

The invention provides a carrier aggregation cell processing method, a processing device, a terminal and a base station. The method comprises steps: battery power of a terminal supporting the carrier aggregation cell is detected; according to the detected battery power and a service data volume requested by the terminal, a decision for carrying out activation and / or deactivation operation on a cell under service of the terminal is determined; and the determined decision is sent to the base station, wherein the decision is used for enabling the base station to carry out activation and / or deactivation operation on the cell under service of the terminal. Thus, the problem of how to manage the carrier aggregation cell in related technology is solved, and effects of effectively ensuring the energy efficiency of the terminal supporting the carrier aggregation cell, optimizing the data performance of the terminal, and improving the user experience can be achieved.

The invention provides a heat pump drying system and a control method. The heat pump drying system comprises a compressor (1), a drying device (100), a drying condenser (21), an outdoor evaporator (41) and an indoor evaporator (42). The drying condenser (21) is connected with the exhaust end of the compressor (1) and can heat air in the drying device (100). The outdoor evaporator (41) can be connected to the air suction end of the compressor (1) so that evaporation heat absorbing can be conducted on the outer portion of the drying device (100). The indoor evaporator (42) can also be connectedto the air suction end of the compressor (1) so that evaporation heat absorbing and dehumidification can be conducted on air in the drying device (100). Through the heat pump drying system and the control method, it can be guaranteed that the system can recycle indoor moisture exhausting latent heat, the material drying temperature rise process requirement can be met as well, and the drying temperature can be controlled while heat waste and surrounding environment pollution are effectively avoided.

The invention provides an exhaust device, a refrigerating air-conditioning unit and a non-condensable gas exhaust method. The exhaust device comprises an exhaust compressor and a heat exchanger, wherein a gas suction opening of the exhaust compressor is connected with a condenser of the refrigerating air-conditioning unit, so that a mixed gas consisting of a gaseous refrigerant and a non-condensable gas is introduced into the exhaust compressor by the condenser to be compressed; a gas inlet of the heat exchanger is connected with an exhaust opening of the exhaust compressor; a liquid outlet ofthe heat exchanger is connected with an evaporator or the condenser of the refrigerating air-conditioning unit; the heat exchanger is provided with a cold source inlet and a cold source outlet whichallow a cold source to flow; the compressed mixed gas enters the heat exchanger to exchange heat with the cold source, a gaseous refrigerant is condensed into a liquid refrigerant which is then discharged into the evaporator or the condenser, and a gas outlet allows the separated non-condensable gas to be discharged out of the heat exchanger. According to the exhaust device, the non-condensable gas in the refrigerating air-conditioning unit can be effectively separated and discharged, so that safe and efficient running of the exhaust device is guaranteed.

The invention discloses a control method of a multi-split air conditioning system. The multi-split air conditioning system comprises an outdoor unit and a plurality of indoor units, wherein the outdoor unit comprises a compressor, an outdoor heat exchanger and a main throttling element. The control method of the multi-split air conditioning system comprises the following steps that a current operation mode of the multi-split air conditioning system is acquired, when the current operation mode of the multi-split air conditioning system is a pure refrigeration mode or a hybrid operation mode, anoutdoor ambient temperature T1 is obtained, wherein the number of the indoor units in a refrigeration state is M; when the outdoor ambient temperature T1 is less than a first preset temperature, an evaporation temperature T2 of the M indoor units in the refrigeration state is obtained; and when the evaporation temperature T2 of N indoor units in the M indoor units in the refrigeration state is less than a second preset temperature, the N indoor units are controlled to generate heat to enable the N indoor units to enter in an anti-freezing mode, wherein N is less than or equal to M. Accordingto the control method of the multi-split air conditioning system, the indoor units entering in the anti-freezing mode can quickly exit the anti-freezing mode.

The invention provides a semiconductor refrigeration camera and a semiconductor refrigeration device of the semiconductor refrigeration camera. The semiconductor refrigeration device comprises a cooling fin bottom plate, a semiconductor chilling plate, a heat dissipation end cooling fin and a refrigeration end cooling fin, wherein the semiconductor chilling plate is installed on the cooling fin bottom plate, and the heat dissipation face of the semiconductor chilling plate is in close contact with the cooling fin bottom plate; the heat dissipation end cooling fin is installed on the outer side face of the cooling fin bottom plate and is in close contact with the cooling fin bottom plate; the refrigeration end cooling fin is installed on the refrigeration face of the semiconductor chilling plate and is in close contact with the refrigeration face of the semiconductor chilling plate; the semiconductor refrigeration camera is installed in a protective cover of the semiconductor refrigeration device. According to the semiconductor refrigeration camera and the semiconductor refrigeration device of the semiconductor refrigeration camera, since electric energy is used for driving semiconductor refrigeration, video surveillance on a high-temperature industrial occasion and a special occasion is realized, the installation efficiency and use efficiency of the high-temperature camera are improved, energy consumption is lowered, and the semiconductor refrigeration camera and the semiconductor refrigeration device of the semiconductor refrigeration camera are environmentally friendly.

The invention discloses special equipment and preparation method of a contact strip compound solder for a low-voltage appliance. The equipment consists of mechanisms, such as a contact strip unwrapping device, a compound solder contact strip wrapping device, a solder strip unwrapping device, a strip surface processing device, strip heating front-roller wheel electrode pairs, a compound solder atmosphere protective tube, strip heating back-rolling wheel electrode pairs and the like. The invention has the advantages of high speed of contact strip compound solder, high utilization ratio of energy sources, even and stable solder layers and low contact resistance of a solder layer and a contact layer.

The invention discloses a control method for relieving frosting of an air conditioner outdoor unit, and belongs to the technical field of air conditioners. The control method comprises the following steps of acquiring the temperature of an outer coil pipe; determining the temperature change condition of the temperature of the outer coil pipe; and when the temperature of the outer coil pipe is higher than the outdoor dew point temperature and the temperature change rate of the temperature of the outer coil pipe is increased, controlling a frosting relieving device to be started. According to the control method for relieving frosting of the air conditioner outdoor unit, the operation state of the frosting relieving device is determined according to the change situation of the temperature ofthe outer coil pipe detected by a defrosting sensor, the change of the micro frosting condition of an air conditioner caused by factors such as external environment can be taken into consideration, and therefore the operation state of the frosting relieving device can be matched with the actual defrosting requirement, control is more accurate, and the operation energy efficiency of the air conditioner in severe cold and low temperature weather is guaranteed.

The invention discloses a heat pump system and a control method of the heat pump system. The heat pump system comprises a compressor, a condenser and an evaporator. A throttling unit is arranged on a flow path between the condenser and the evaporator. The throttling unit comprises at least two throttling branches connected in parallel. Each throttling branch is provided with a throttling component. The evaporation temperature range of the compressor is sufficiently utilized by selecting the number of the connected throttling branches in the heat pump system. The at least two throttling components connected in parallel are arranged in the heat pump system, so that one or two or more throttling components can carry out throttling according to specific working conditions, and therefore the operation range of the compressor is sufficiently utilized.

The invention provides an air conditioning system for a two-stage enthalpy-added vehicle and a control method. The air conditioning system for the two-stage enthalpy-added vehicle includes a compressor (1), an indoor heat exchanger (6), an outdoor heat exchanger (2) and a main throttling device (3), wherein the compressor (1) includes a medium pressure air supplementing port (12) and is a variablecapacity compressor; a pipe between the indoor heat exchanger (6) and the main throttling device (3) is further provided with an air-supplementing and enthalpy-increasing component, and medium pressure refrigerant gas generated by the air-supplementing and enthalpy-increasing component is communicated with the medium pressure air supplementing port (12). High heating capacity can be provided forthe vehicle air conditioning system in a volume ratio variable air-supplementing and enthalpy-increasing mode, the shortcoming of low heating capacity in automobiles, and particularly in electric automobiles are overcome, the energy efficiency can be effectively improved, the power consumption can be reduced, the heating capacity and energy efficiency under the low temperature operating conditionscan be ensured, and the energy efficiency under normal operating conditions is ensured.

The invention provides a heat pump unit and a control method thereof. The control method of the heat pump unit includes: when the heat pump system controls the compressor to return oil, the heat pump system selects different control modes to control the compressor according to the current target outlet water temperature of the heat exchange unit. In the first control mode, directly Increase the frequency of the compressor to the first frequency, and continue to run at the first frequency until the oil return process is over; in the second control mode, first control the compressor to stop for a period of time, then restart the compressor and control the compressor to run to second frequency, and then control the compressor to continue to run at the second frequency until the oil return process ends. The heat pump unit provided by the present invention can select different control methods to control the compressor according to the target outlet water temperature when the compressor is returning oil, so that the energy efficiency of the unit can be guaranteed and the energy efficiency of the unit can be reduced during the oil return process of the compressor. Small indoor temperature fluctuations improve user comfort.

The invention provides a support structure of a refrigerator door and a refrigerator. The support structure of the refrigerator door comprises a rolling assembly and a support frame; the rolling assembly is arranged at the free end of the refrigerator door; the support frame is fixed on the housing of the refrigerator and located on the lower end of the rolling assembly; the rolling assembly is supported on the support frame and capable of rolling on the support frame. According to the support structure of the refrigerator door, in the process of closing the refrigerator door, the rolling assembly is capable of rolling on the support frame, and therefore, the smooth of the refrigerator door in the closing process is guaranteed; besides, the rolling assembly can be supported on the support frame so that the two ends of the refrigerator door can be supported when the refrigerator door is in the closed, and consequently, the refrigerator door is effectively prevented from tilting towards the free end under the action of the gravity, and furthermore, the quality of the product is improved.

The invention provides a compressor lubricating oil backflow structure and a compressor. The compressor lubricating oil backflow structure comprises an outer housing. An upper support and a crankshaftare arranged in the outer housing. A bottom oil pool is arranged at the bottom of the outer housing; and the crankshaft is connected to the upper support in a rotatable mode. An oil storage cavity isformed in the upper support; the oil storage cavity is used for storing lubricating oil pumped by the crankshaft from the bottom oil pool; an oil return assembly is arranged on the oil storage cavity; and the oil return assembly comprises an oil return pipeline, wherein one end of the oil return pipeline is located in the oil storage cavity, and the other end of the oil return pipeline is locatedunder the liquid level of the lubricating oil in the bottom oil pool. According to the compressor lubricating oil backflow structure and the compressor, disturbance of exhaust refrigerants to the lubricating oil in the lubricating oil backflow falling process can be effectively reduced, then the amount of the lubricating oil carried by the exhaust refrigerants is reduced, and therefore, it is guaranteed that the amount of the lubricating oil in the bottom oil pool is sufficient.

The invention discloses a control method of an air conditioning system. The air conditioning system comprises a compressor, the compressor is connected with an air exhaust pipeline and an air return pipeline, and at least one of the air exhaust pipeline and the air return pipeline is provided with a pressure adjusting device. The control method of the air conditioning system comprises the following steps of acquiring air exhaust temperature of the air exhaust pipeline; adjusting operating parameters of the pressure adjusting device according to the air exhaust temperature of the air exhaust pipeline so as to adjust pressure of the pipeline refrigerant in the pressure adjusting device. The invention further discloses a control device of the air conditioning system and a computer readable storage medium, the air exhaust temperature is adjusted by adjusting the pressure adjusting device, the operation frequency of the compressor can be adjusted while the energy efficiency of an air conditioner is ensured, so that the noise caused by the fact that the compressor is at a higher frequency is reduced.

The invention discloses a microbial fuel cell based on a trimethylamine oxide medium, and belongs to the field of biological fuel cells. The microbial fuel cell based on the trimethylamine oxide medium comprises a reactor, a cell positive electrode and a cell negative electrode, wherein the reactor is arranged in a shell, the cell positive electrode and the cell negative electrode are arranged outside the shell, the bottom of the cell positive electrode is connected to one end of the reactor, and the bottom of the cell negative electrode is connected to the other end of the reactor. The microbial fuel cell based on the trimethylamine oxide medium has the advantages that the electrode surface activation area is large, the electrostatic interaction between microorganisms and the electrode surfaces is enhanced, microorganism adsorption performance is improved, catalysis performance is good, and therefore the cell yield is increased and the production cost is reduced.

The invention discloses a liquid cooling cooling-water machine provided with an adjustable supercooler unit. The heat exchange temperature adjustable supercooler unit is connected between a condenserand a throttling element in the cooling-water machine in series. The supercooler unit comprises a motor, a driving screw rod, a driven screw rod and a supercooler. The supercooler comprises a top cover, a cooling pipe, a corrugated pipe, springs, limiting sleeves, spacer sheets, a supporting sleeve and a liquid trap which form multiple series-connected cavities. By changing the internal volumes ofthe multiple cavities, the internal heat exchange area and internal temperature of the supercooler are adjusted, so that the supercooling capacity of a coolant at an inlet of the throttling element is controlled dynamically, the specific volume of the volume occupied by flash gas in the throttling element is controlled, the cooling capacity is increased, and the energy efficiency of the cooling-water machine is improved. In addition, the supercooler can conduct effective superheating on the coolant at an outlet of an evaporator, so that part of residual liquid at the outlet of the evaporatoris further evaporated through superheating, the phenomenon of gas suction liquid carrying of a compressor is effectively inhibited, and normal operation of the compressor is ensured.

The embodiment of the invention discloses a heat pump defrosting exit control method and device, electronic equipment and a storage medium. According to the technical scheme provided by the embodiment of the invention, a condition parameter threshold value for identifying that a heat pump exits a defrosting program is preset, a defrosting exiting moment of each defrosting period of the heat pump is determined based on the condition parameter threshold value, interval time between two adjacent defrosting periods is determined by combining a defrosting entering moment of each defrosting period, whether the interval time is shortened or not is judged by comparing two adjacent interval time, and if the interval time is shortened, the condition parameter threshold value is corrected according to a set correction value. By the adoption of the technical means, the defrosting exit condition of the heat pump can be adaptively corrected, the situation that a frost layer of an evaporator can be removed as far as possible is ensured, the situation that the frost layer is accumulated and expanded due to incomplete defrosting is avoided, then the energy efficiency of the heat pump is guaranteed, and operation faults are avoided.

The invention discloses a speed distribution method in a wireless body area network based on a Stankelberg game. Under the limitation of a network capacity, a coordinator serving as a game leader adjusts the data transmission speeds of sensor nodes in the same network through formulating speed prices, so that the own earning is maximized; and then, the sensor nodes serving as game followers acquire the respective optimal transmission speeds according to the best response function of the speed prices. According to the method, during the process of designing the utility function, the heterogeneity of data collected by the sensor nodes with different functions in the network is considered to meet the diverse requirements of the different data on transmission speeds, and the satisfaction of the user is improved. Furthermore, the instantaneity of abnormal data transmission is ensured through dividing priorities for each sensor node according to the abnormity of the data collected by the node and the energy efficiency of the node, and the service life of the network is prolonged.

The invention relates to micro laser projection display technologies, particularly provides an optical structure, system and method for eliminating laser projection speckles, and aims at overcoming the defect that the energy efficiency is reduced when the spatial differences are increased to eliminate the speckle phenomenon in current micro laser projection display technologies. The optical structure includes a laser light source, a light mixing stick, a digital micro-mirror device and a DMD array, laser beams emitted by the laser light source is subjected to multiple total reflection in the light mixing stick, emergent lights formed by the multiple total reflection are incident on the digital micro-mirror device which is loaded with digital holography source information, and laser beams emitted from the digital micro-mirror device go through the DMD array and reach a display terminal. On the premise of effectively eliminating the speckle phenomenon, the optical structure, system and method solve the contradiction between speckle elimination and energy efficiency in the current laser projection display technologies. Meanwhile, the optical structure, system and method have the advantages of being simple in structure and easy to implement.