89results about How to "Reduce exhaust temperature" patented technology

The invention provides a micro-pressure air fryer which comprises a sealed cooking cavity and a hot air assembly, the hot air assembly comprises a heating piece and a hot air fan, the hot air assembly conveys hot air into the cooking cavity to cook food, the cooking cavity is provided with a steam exhaust channel, steam generated in the cooking cavity is exhausted through the steam exhaust channel, and the volume of the cooking cavity is 3-10 L. The relation between the sectional area S of the steam exhaust channel and the power density phi of the air fryer meets S = K * phi, the value of K is 0.03-1 mm < 2 > / (W / L) so that the working pressure intensity of the cooking cavity can be maintained at 80-960 pa, and the power density is the ratio of the power of the heating piece to the volume of the cooking cavity. According to the air fryer, the influence of the volume of the cooking cavity, the heating power and the sectional area of the steam exhaust channel on the working pressure of the cooking cavity is fully considered, so that the working pressure of the air fryer designed according to the application tends to be consistent, and a user can adopt the same cooking process when cooking the same food material by using different types of air fryers; different types of air fryers have good cooking consistency.

The invention provides a symmetrical-tooth variable-pitch twin-screw rotor and a vacuum pump, and belongs to the technical field of vacuum pumps, the symmetrical-tooth variable-pitch twin-screw rotor comprises a male rotor and a female rotor which are meshed with each other, the end face molded lines of the male rotor and the female rotor are completely the same and are formed by connecting 12 sections of curves connected end to end, and the six sections of curves sequentially comprise a tooth crest arc ab, a first section of epicycloid bc, a second section of epicycloid bd and a third section of epicycloid bd; a first section of epicycloid, a second section of epicycloid cd, a tooth bottom arc de, a third section of epicycloid ef and a fourth section of epicycloid fg, and the other six sections of curves are arranged in central symmetry with the six sections of curves; the screw pitches of the male rotor and the female rotor are reduced from the suction end to the exhaust end in the circumferential direction. The design can improve the overall stability and operation balance of the rotor and effectively reduce the vibration of the rotor during high-speed operation, so that the bearing load is reduced, and the service life of the vacuum pump is prolonged.

The invention relates to a heat pump system and a control method thereof, the heat pump system is provided with a liquid spraying enthalpy increasing branch, a refrigerant in a refrigerant circulation loop can be shunted between a first throttling element and a main path of an economizer, and the refrigerant flows into an air supplementing opening of a compressor through an auxiliary path of the economizer for air supplementing and enthalpy increasing. An air supply throttling element is arranged on the liquid spraying enthalpy increasing branch, and the controller obtains the exhaust superheat degree according to the exhaust temperature and the exhaust pressure, determines the optional adjusting mode of the opening degree of the air supply throttling element according to the exhaust superheat degree and obtains the superheat degree of the economizer according to the side road inlet temperature and the side road outlet temperature. According to the method, the target adjusting mode is determined from the selectable adjusting modes based on the superheat degree of the economizer, the opening degree of the air supply throttling element is controlled through the target adjusting mode, and the reliability of the compressor can be guaranteed while the exhaust temperature is reduced and the refrigerating and heating capacity is improved. And the heat exchange capacity of the economizer can be fully utilized, the refrigerant can be ensured to obtain sufficient supercooling degree, and the heat absorption capacity of the evaporator is improved.

The two-stage compression oil piston type electric air compressor comprises a motor, an air cylinder, an end cover and a box body, the end cover is fixedly installed at the top end of the air cylinder, the air cylinder is fixedly installed at the upper end of the box body, a crankshaft is arranged in the box body, the right side end of the crankshaft is connected with a coupler, and the output end of the motor is connected with the other end of the coupler. A first-stage compression cavity and a second-stage compression cavity are distributed in the air cylinder, pistons capable of moving up and down are arranged in the first-stage compression cavity and the second-stage compression cavity respectively, the bottom end sides of the pistons are connected to the crankshaft, an interstage cooler is fixed between the box body and the motor, an air guide cover is installed at the upper end of the interstage cooler, and a centrifugal fan is fixedly installed on the coupler. The centrifugal fan is located on the inner side of the interstage cooler, the position, located on the first-stage compression cavity, of the air cylinder communicates with the interstage cooling pipe, the interstage cooling pipe extends to the position between the centrifugal fan and the interstage cooler, and the other end of the interstage cooling pipe communicates with a second-stage compression cavity in the air cylinder. The invention has the advantages of simple and reliable structure, high working efficiency, low noise, small vibration and long service life.

The utility model relates to the technical field of tail gas heat energy utilization of turbine fans of paper mills, in particular to a tail gas heat energy recovery system of a turbine multistage centrifugal pump of a paper machine. The system comprises a waste gas filtering device, a heat energy recycling device, a clear water circulating device and a waste gas treatment device, the heat energy recycling device comprises a heat exchanger, the waste gas treatment device comprises a spraying tower, the waste gas treatment device comprises a filtering box and a turbine multi-stage centrifugal pump, the turbine multi-stage centrifugal pump is connected to the filtering box through a pipeline, and the spraying tower is connected to the spraying tower. The bottom end of the heat exchanger is connected to the filter box, the top end of the heat exchanger is connected to the bottom end of the spray tower through a pipeline, and the clear water circulating device is connected to the heat exchanger through a water pipe. According to the utility model, the turbine multistage centrifugal pump exhausts air to heat the clear water of the paper machine, so that the waste heat is effectively utilized, the temperature of the papermaking clear water is increased, the energy consumption is saved, the exhaust temperature is reduced, the amount of water exhausted into the atmosphere is reduced, and the environment protection is facilitated.

The invention relates to the technical field of compressed air energy storage, in particular to an industrial waste heat coupling isothermal non-afterburning compressed air energy storage system which comprises an isothermal compression energy storage module, an isothermal compression heat recovery module, an industrial waste heat conversion module and an expansion power generation module. The isothermal compression energy storage module achieves multi-section compression of air and stores compressed air through electric energy in the valley period, and the isothermal compression heat recovery module is used for collecting compression heat generated by the isothermal compression energy storage module during multi-section compression of the air. The expansion power generation module receives the industrial waste heat stored by the industrial waste heat conversion module and is used for compressed gas expansion power generation; the isothermal compressor technology is adopted for compressing air, the compressed air energy storage efficiency is improved, the compression power consumption is reduced, meanwhile, industrial waste heat is fully utilized for heating the compressed air in the expansion stage, the problem that compression heat is insufficient in the isothermal compression process is solved, and the energy storage efficiency and the energy-saving effect are higher.

The invention discloses an atomization oil injection CO2 scroll compressor under a large pressure difference working condition, and relates to the technical field of compressors, the atomization oil injection CO2 scroll compressor comprises a cylinder body, a lower end cover and a static scroll plate, the lower end cover is connected with the cylinder body through a bolt, a first annular sealing groove is formed in the contact surface of the lower end cover and the cylinder body, and the static scroll plate is connected with the cylinder body through a bolt; a second annular sealing groove is formed in the face, making contact with the barrel, of the static vortex disc, the static vortex disc is located above the barrel, the lower end cover is located below the barrel, the static vortex disc comprises an end plate, an involute type vortex body and a rotational flow cone straight nozzle, the involute type vortex body is composed of the sealing groove and a kidney-shaped exhaust port, and nozzles are symmetrically formed in the end plate. According to the atomization oil injection CO2 scroll compressor under the large pressure difference working condition, the superheat degree of a refrigerant can be reduced, an oil film is formed in a leakage channel, the leakage amount of the refrigerant can be reduced, and therefore the exhaust temperature is reduced, and reliable and efficient operation of the scroll compressor is guaranteed.

According to the solar heat pump heat supply system based on quasi-two-stage compression and the heat supply method of the solar heat pump heat supply system, the concept is novel, the design is optimized and ingenious, the condensation heat exchange amount can be effectively increased through an air supply enthalpy increasing compressor, the exhaust temperature of the compressor can be effectively reduced through the air supply technology, and efficient and stable operation of the system under the ultralow-temperature large-temperature-area variable working condition is achieved; meanwhile, the air supply enthalpy increasing compressor and the heat storage water tank are arranged, the condensation heat exchange amount can be effectively increased, and therefore circulating air with the higher temperature can be obtained; solar energy is adopted as an auxiliary heat source, the evaporation temperature of the heat pump system can be increased, then the efficiency of the whole solar heat pump heat supply system is improved, efficient heating is achieved, and meanwhile uninterrupted supply of domestic hot water can be achieved; a solar heat collection technology and a quasi-two-stage compression heat pump technology are coupled, advantage complementation of the two systems is achieved, the energy efficiency ratio of the whole solar heat pump heat supply system is improved, the service life of equipment is prolonged, and the annual operation efficiency, reliability and economical efficiency of a solar heat pump unit are improved.

The present invention discloses an over-compression elimination device and a variable pitch screw vacuum pump, comprising a valve body, a valve stem movably connected in the valve body; the valve body has an inlet and an outlet; a valve cover is installed on one side of the outlet of the valve body, one end of the valve stem is connected to the valve cover, and the other end of the valve stem extends along the axial direction of the valve body to the inlet side of the valve body; the inlet end of the valve body of the elimination device is connected to the pressure chamber of an external mechanism. The over-compression elimination device of the present invention keeps the valve stem and the valve body sealed at all times by a retaining member. When the pressure in the pump chamber connected thereto is over-pressured, the pressure of the compressed air offsets the restoring force of the retaining member to drive the valve stem to move, so as to achieve communication with the outside world, thereby achieving pressure relief. This structure effectively reduces the exhaust temperature and shaft power consumption of the variable pitch screw vacuum pump, and improves the operating efficiency, reliability and air extraction performance.

The invention relates to a treatment method and a treatment device for VOCs-containing waste gas, the VOCs-containing waste gas is heated and then enters a catalytic oxidation reactor, the reactor takes a fluidized bed as a main body and is filled with a particle catalytic oxidation catalyst, and the waste gas and the particle catalyst are subjected to a fluidized oxidation reaction; a cylindrical fixed bed is radially arranged in the fluidized bed and filled with a regular catalytic oxidation catalyst, and the lower end of the fixed bed penetrates through the bottom of the reactor and is gathered at an exhaust pipe; a gas-solid separator is arranged at the upper part of the fluidized bed, fluidized and oxidized waste gas passes through the gas-solid separator, catalyst particles carried by the waste gas are intercepted, separated gas enters from the top of the fixed bed and is continuously oxidized, and high-temperature purified gas is exhausted through an exhaust pipe. According to the method and the device, the reaction temperature of catalytic oxidation is effectively homogenized, high-temperature hot spots of a catalyst bed layer and influences on the service life of the catalyst are avoided, and meanwhile deep treatment of waste gas and effective utilization of heat are achieved.

The invention relates to a method for controlling air conditioning equipment. According to the method, the heating capacity of the air conditioning equipment when the external environment temperature is too low and the refrigerating capacity of the air conditioning equipment when the external environment temperature is too high are guaranteed by conducting liquid return and / or air return on a compressor. In addition, the invention further relates to the air conditioning equipment, and the air conditioning equipment can execute the method.

The utility model provides a double-heat-source heat pump air conditioning system. The utility model discloses a double-heat-source heat pump air-conditioning system. The air-conditioning system comprises a solar heating system, a cascade air-conditioning system, a geothermal source heating system and a user side energy supply system, wherein the solar heating system exchanges heat with the cascade air conditioning system, and the cascade air conditioning system exchanges heat with the user side energy supply system, so that heat obtained by the solar heating system is transferred to the user side energy supply system; and the geothermal source heating system exchanges heat with the cascade air conditioning system. The double-heat-source heat pump air-conditioning system can effectively improve the heat exchange efficiency of solar energy and a geothermal source, provides hot water with higher temperature for users, and meets the use requirements of the users.

The invention relates to the technical field of compressors, and particularly discloses a vortex electric compressor which comprises a machine body, a machine cover, a static disc, a movable disc, a rotating shaft and a bearing seat, the bearing seat is arranged in the machine body, the rotating shaft is embedded in the machine body, the two ends of the rotating shaft are matched with the machine body and the bearing seat correspondingly, and the static disc is detachably connected with the bearing seat through a positioning pin; the static disc is arranged in the machine body and located on one side of the bearing seat, the static disc is embedded in the machine body, a cavity is formed between the static disc and the bearing seat, the movable disc is arranged in the cavity, the vortex type line of the movable disc is meshed with the vortex type line of the static disc, the machine cover is detachably connected with the machine body through the screw rod, and the machine cover covers the machine body. Leakage of a sealing surface of a compression cavity of the pump body is reduced, compression efficiency is improved, exhaust temperature is reduced, the compressor is integrally optimized and improved, and circulation of lubricating oil in the pump body is achieved.

The utility model discloses a compressor exhaust gas recovery system which is used in a tail gas recovery operation scene of a degassing system of a polyethylene device, and a first-stage gas inlet tank, a first-stage exhaust tank, a second-stage gas inlet tank and a second-stage exhaust tank are sequentially communicated with the tail section of the degassing system; the two ends of the first-stage return line fixedly communicate with an air inlet of the first-stage air inlet tank and an air outlet of the first-stage exhaust tank correspondingly, and the compressor body communicates with the first-stage air inlet tank, the first-stage exhaust tank, the second-stage air inlet tank and the second-stage exhaust tank correspondingly. According to the application, the primary return line is communicated with the gas inlet of the primary gas inlet tank and the gas outlet of the primary exhaust tank, so that tail gas subjected to primary exhaust operation flows back to the gas inlet of the primary gas inlet tank again, and the exhaust temperature of the compressor between the secondary gas inlet tank and the secondary exhaust tank is at a low temperature level; the exhaust temperature of the compressor is reduced, so that the working load of the compressor is enhanced.

The utility model discloses a refrigerator defrosting water evaporation structure which comprises a condenser, a fan, a defrosting water temperature rising disc and an evaporation disc, the defrosting water temperature rising disc and the evaporation disc are stacked up and down, a high-temperature pipe is arranged in the evaporation disc, and the fan conveys hot air generated when the condenser works to the position between the defrosting water temperature rising disc and the evaporation disc and to the position above the defrosting water temperature rising disc. According to the defrosting water evaporation structure of the refrigerator, defrosting water with the temperature ranging from 0 DEG C to 5 DEG C discharged from the refrigerator firstly falls into the defrosting water temperature rising disc on the uppermost layer, the temperature of the defrosting water is increased to be equal to the temperature of the condenser through hot air of the fan, the temperature of the defrosting water is increased greatly at the stage, and part of the defrosting water is evaporated under the action of the hot air.

The present invention relates to the field of heat exchange materials for heat pumps, and discloses a working fluid suitable for ultra-high temperature heat pump systems, a preparation method thereof, and an application thereof. The working fluid is a binary mixed working fluid composed of 1,2-propylene oxide and n-pentane; in the working fluid, the mass proportion of 1,2-propylene oxide is 56% to 58%, the mass proportion of n-pentane is 42% to 44%, and the sum of the mass proportions of 1,2-propylene oxide and n-pentane is 100%. The working fluid can meet the heating temperature requirements of ultra-high temperature heat pumps above 140°C without further compressing and heating low-parameter steam with a water vapor compressor, and also has the advantages of small temperature glide, high heating capacity per unit mass and energy efficiency ratio, and environmental protection, and can achieve low inlet superheat and low exhaust temperature at the same time within a wide range of compressor isentropic efficiency.

The invention relates to the technical field of household appliances, in particular to a control method of a heat pump system and the heat pump system, and aims to solve the problem that the safety of a compressor is poor in the two-phase injection circulation process of an existing heat pump system. Therefore, the heat pump system comprises a compressor, a condenser, an economizer, a first expansion valve, an evaporator, a gas-liquid separator, a first branch, a second branch and a second expansion valve installed on the first branch, and the control method comprises the steps that the opening degree of the first expansion valve is controlled so that the superheat degree of the evaporator can be within a first preset interval; the opening degree of the second expansion valve is controlled so that the target temperature difference T can be larger than zero degree and smaller than the set temperature; the target temperature difference T is equal to T1-T2, T1 is the temperature of the mixing point in the compressor, and T2 is the saturation temperature corresponding to the pressure of the branch outlet. Through the control, the mixing point in the compressor can be always in an overheat area, the compressor is protected, and the exhaust temperature of the compressor is prevented from being too high.

The present invention discloses a three-condition system with an ejector, aiming to provide a three-condition system in which a single-stage compression refrigeration system is used in air conditioning working condition, a quasi-two-stage compression refrigeration system with an ejector and intermediate air supply is used in ice making working condition, and a quasi-two-stage compression heat pump system with an ejector and intermediate air supply is used in winter heating working condition, so as to reduce the initial investment cost of the system, reduce energy consumption and operating costs, and save energy. The system includes a compressor with intermediate air supply, a four-way reversing valve, an outdoor heat exchanger, an indoor heat exchanger, an ice making evaporator, an economizer, an ejector, a throttling device, a regulating valve group and a plurality of valves. The switching of the single-stage compression refrigeration system, the quasi-two-stage compression refrigeration system with an ejector and the quasi-two-stage compression heat pump system with an ejector and intermediate air supply is realized by opening and closing a plurality of valves, thereby reducing the initial investment of the system.

The present invention discloses a refrigeration system, a defrost control method and a refrigeration device. The refrigeration system includes: a refrigeration cycle loop, which is formed by connecting a compressor unit, a condenser and an evaporator unit, the compressor unit includes a first compressor and a second compressor arranged in series, and the refrigerant discharged from the first compressor is sent to the air intake of the second compressor; a heat recovery defrost loop, which is formed by connecting a compressor unit, an evaporator unit, an auxiliary heat exchanger and a heat regenerator, the refrigerant flowing out of the condenser is sent to the evaporator unit for refrigeration through the first heat exchange pipeline of the heat regenerator, and the refrigerant flowing out of the defrost of the evaporator unit is sent back to the air intake of the first compressor through the auxiliary heat exchanger and the second heat exchange pipeline of the heat regenerator, and the auxiliary heat exchanger is used to cool the refrigerant discharged from the first compressor. The present invention introduces the liquid refrigerant that undergoes phase change after defrosting into the auxiliary heat exchanger and the heat regenerator, eliminates the hidden danger of liquid hammer, and reduces the exhaust temperature of the compressor unit, reduces the work of the compressor, and improves the refrigeration efficiency.

The utility model provides a compressor cylinder cover and a compressor. In order to solve the problem that an exhaust cavity of an existing compressor cylinder cover is insufficient in strength and prone to damage, a first supporting arm and a second supporting arm are arranged in the exhaust cavity of the cylinder cover, connection between a boss on the inner wall of the exhaust cavity and a U-shaped groove is established, reinforcing ribs are additionally arranged, the U-shaped groove is supported from three positions, the strength of the U-shaped groove is improved, and the strength of the U-shaped groove is improved. And the damage to the U-shaped groove during exhaust impact is reduced.

The utility model provides a kind of heat pump air conditioning system, including through pipeline connection formation refrigerant circulation loop's compressor unit, four-way valve, first heat exchanger, economizer air supplement structure and second heat exchanger, wherein, compressor unit includes multiple parallelly arranged compressor, and the multiple air supplement pipes of economizer air supplement structure are connected with the air injection port of multiple compressor one-to-one corresponding;The heat pump air conditioning system provided by the utility model is equipped with economizer air supplement structure, and each air supplement pipe of the economizer air supplement structure respectively guides air supplement airflow to the air injection port of each compressor, so that air supplement airflow is mixed with main airflow inside compressor, and then effectively reduces the exhaust temperature of each compressor.

The utility model provides a jet synergy type enhanced vapor injection high-efficiency heat pump, the system is composed of a conventional heat pump module, an enhanced vapor injection module and a jet module, the enhanced vapor injection module comprises a flash tank and a jet electronic expansion valve, and the jet module comprises a jet, an electromagnetic valve and other parts. Refrigerant flashed from the flash tank enters the ejector through the ejection electronic expansion valve and is ejected to a middle pressure cavity of the compressor through the ejector, and the enhanced vapor injection effect is generated. Besides, in order to improve the ejection effect of the ejector and control the working temperature of the compressor, an ejection coil pipe is designed in the gas-liquid separator, high-temperature and high-pressure refrigerants are introduced from the high-pressure side, and heat exchange with return gas refrigerants is achieved in gas separation, so that on one hand, the temperature of the refrigerants in the low-pressure section of a compressor cavity can be increased, and the compressor is prevented from running with liquid; meanwhile, the intermediate cavity temperature and the exhaust temperature of the compressor can be reduced, the whole cavity temperature of the compressor is moderate, and safe and reliable operation of the compressor is guaranteed.

The utility model discloses a double cooling snow making is with sliding vane type air compressor, including mainframe shell, mainframe shell one end installs middle oil cooler, middle oil cooler side surface is connected motor cooling fan, motor cooling fan side surface installs drive motor, drive motor one end is equipped with rear air cooler, middle oil cooler side surface is connected oil gas separator. This double cooling snow making is with sliding vane type air compressor, through installing middle oil cooler in mainframe shell one end, simultaneously in middle oil cooler side surface is connected motor cooling fan, and in motor cooling fan side surface installs drive motor, and the layout is reasonable compact, utilizes motor fan and carries out air cooling, need not for air cooler alone design air duct or installation position, when using, it is more convenient in the snow making site deployment and transportation of limited space, not only reduced manufacturing cost also reduced operating energy consumption, improved the economy and reliability of system.

This utility model discloses a high-efficiency venting structure for die-casting molds, relating to the field of mold technology. It includes: a fixed mold and a moving mold; the fixed mold has a cavity at the top center, and the moving mold has a mold base fixedly installed at the bottom, inserted into the cavity; a venting groove is located at the bottom center of the mold base, and a venting hole penetrating the mold base and the moving mold is located at the top of the venting groove; a venting assembly is located inside the venting groove; and a cooling assembly is fixedly installed at the top of the venting pipe. This utility model achieves automatic venting, preventing molten metal leakage and ensuring venting efficiency. It also extends the flow path of high-temperature gas within the venting stack. Combined with circulating cold water and heat dissipation fins in the water tank, it can quickly absorb gas heat, reduce the venting temperature, prevent direct venting of high-temperature gas from scalding operators, and reduce the impact on the workshop environment temperature.

The present invention provides a frost-free air source air-increasing heat pump for solution dehydration, including an air-increasing heat-increasing heating cycle and an ice-dehydration cycle; the ice-dehydration cycle includes a solution heat exchange pipeline, a storage liquid circulation pipeline and a solution regeneration pipeline, wherein the solution heat exchange pipeline includes a first evaporator, a heat exchange tower, a second stop valve and a first pump; the storage liquid circulation pipeline includes a dilute solution discharge pipeline and a concentrated solution circulation pipeline, the dilute solution discharge pipeline includes a second pump and a first liquid storage tank, and the concentrated solution circulation pipeline includes a second liquid storage tank and a first pump; the solution regeneration pipeline includes a first expansion valve, a dehydrator, a first liquid storage tank and a third pump. The present invention not only reduces the exhaust temperature of the compressor, but also can realize three operating modes such as heating + ice-dehydration + deicing, ensure the continuous operation of heating and the regeneration effect of the solution, occupy a low area and investment cost, is simple to operate, saves the consumption of heat energy, and improves the energy efficiency of the frost-free air source heat pump system.

The embodiment of the utility model provides a kind of water-cooled muffler, relate to silencing device technical field.Water-cooled muffler includes muffler body, inlet pipe, exhaust pipe, inlet pipe and outlet pipe.Water-cooled muffler is provided with sound attenuation chamber and cooling chamber in muffler body.Inlet pipe, exhaust pipe, inlet pipe and outlet pipe are set to the outside of muffler body.Inlet pipe, exhaust pipe and sound attenuation chamber are communicated.Cooling chamber is provided with cooling element.Inlet pipe, outlet pipe are respectively communicated with cooling element.The utility model can cool muffler, reduce exhaust temperature, improve the infrared function of equipment.

The present invention provides a flue gas dust removal and mist elimination heat recovery system, including a flue gas mist elimination heat recovery box, a water storage tank connected to three heat exchangers through water pipes, a spray circulation pump is also provided between the water storage tank and the heat exchanger, the heat exchanger is also connected to a spray pipe, a spray head is provided at the upper end of the spray pipe, and the upper ends of the three spray pipes are respectively located in the primary operation area, the secondary operation area and the desulfurization tower; the outlet pipe of the heat exchanger is also connected to a high-temperature water tank, a preheating water tank, and a coal washing water pipeline, and the high-temperature water tank provides heating water to the outside through a hot water frequency conversion supply pump. Its beneficial effect is that the multi-stage water film spraying in the system can greatly reduce the temperature of the discharged high-temperature flue gas, and the condensed water and the spray water are stored at the bottom of the box body. After heat exchange by the heat exchanger, hot water resources can be provided for various heat-demanding units in the mining area, such as bathing water, heating water, and preheating of gas or water for equipment.

This invention relates to the field of multi-split air conditioning system technology, specifically to a disturbance control method for the outer loop electronic expansion valve of an air conditioning system. The problem this invention addresses is how to actively eliminate oil and refrigerant blockage and reduce exhaust temperature during defrosting or oil return processes through forced disturbance control of the outer loop electronic expansion valve. To solve this problem, this invention provides a control method comprising: acquiring the operating status parameters of the air conditioning system; determining whether the air conditioning system has triggered a disturbance program based on the status parameters; correcting the reference setting based on the exhaust temperature, compressor return superheat, and oil separator return oil temperature during the execution of the disturbance mode; determining whether to exit the disturbance program based on the exhaust temperature and the execution duration of the disturbance program during defrosting and oil return modes; and automatically exiting the disturbance program when the air conditioning system exits the defrosting or oil return mode.

The utility model discloses a kind of heating furnace shell structures with high-efficiency heat insulation interlayer, including radiation chamber, the top of the radiation chamber is provided with convection chamber, the top of the convection chamber is provided with flue gas pipe, the inside of the radiation chamber is provided with waste heat insulation component, vacuum heat insulation component is arranged between the radiation chamber and waste heat insulation component, the inside of the waste heat insulation component is provided with burner;The utility model passes through the interoperation between heat insulation lining, flow-through cavity, fan, heat exchange tube, flow guide pipe and exhaust pipe, so that device can extract airflow and exhaust heat exchange when using, reduce exhaust temperature, exhaust waste heat can be effectively utilized simultaneously, hot gas can pass through flow-through cavity after heat exchange, hot gas can form insulation layer outside combustion chamber at this time, to prevent heat loss, improve the heat insulation performance of device.

The present invention relates to a diesel-methanol dual-fuel system and a control method thereof for a medium- and high-speed marine diesel engine. The diesel-methanol dual-fuel system comprises: the original marine diesel engine and the original fuel system, and a diesel ECU; and further comprises: a methanol supply system, an alcohol injector assembly, an intake air temperature control system, a methanol electronic control system, and a DOC catalytic oxidizer directly installed on the basis of the original engine; the present invention applies the diesel-methanol combined combustion technology on the marine diesel engine to effectively achieve efficient combustion and greatly improve the thermal efficiency of the engine under medium and large load conditions.