7results about How to "Improve heating energy efficiency" patented technology

The invention relates to an oil outlet control assembly, a rotary machine, a compressor and an air conditioner in the technical field of air conditioners, the oil outlet control assembly comprises a shell, a control part and a damping assembly, and the damping assembly is designed to limit the corresponding position of the control part in a high-speed rotating state and a low-speed rotating state; therefore, the control piece can close part of the oil hole sets in the high-speed rotating state to reduce the oil spitting amount of the compressor, namely, the oil spitting amount of the compressor is ingeniously controlled along with frequency conversion of the compressor through cooperation of the control piece and the damping assembly, so that the oil spitting amount is not affected when the compressor operates at low and medium frequencies, and the service life of the compressor is prolonged. The mass flow rate of refrigerants in the compressor and the refrigerating capacity of the compressor are correspondingly kept, when the compressor operates at high frequency, the oil spitting amount is reduced, oil lubrication of a pump body assembly of the compressor can be normally maintained, meanwhile, refrigerant oil participating in circulation in the air conditioning system is reduced, an oil film covering the inner wall of an air conditioning system pipeline is reduced, and the heat exchange efficiency of the air conditioning system is effectively improved.

The utility model relates to a kind of PV / T phase change energy storage water source heat pump heating system, including heat collection circulation loop, heat transfer circulation loop, heating circulation loop;Heat collection circulation loop includes cyclically communicated PV / T photovoltaic photo-thermal plate and phase change water tank;Heat transfer circulation loop includes cyclically communicated phase change water tank and double-source heat pump;Heating circulation loop includes cyclically communicated double-source heat pump and fan-coil unit.Wherein, phase change water tank includes shell, and the first spiral pipe heat exchanger and second spiral pipe heat exchanger of shell inside being set;First spiral pipe heat exchanger is connected with PV / T photovoltaic photo-thermal plate closed loop, and second spiral pipe heat exchanger is connected with double-source heat pump closed loop.Compared with prior art, the PV / T photovoltaic photo-thermal plate of the utility model system is collected solar heat while generating electricity, and the electric energy generated can drive heat pump to operate, and heat energy is used for auxiliary heating or storage;Heat pump utilizes double-source to improve heating energy efficiency, and phase change energy storage reduces energy loss.

The utility model provides a cascade type high-temperature heat pump system which comprises a first-stage heat pump system, a second-stage heat pump system and a water supply system, the first-stage heat pump system comprises an enthalpy spraying compressor, a four-way valve, a first-stage heat exchanger, an evaporation assembly, a first-stage throttler and a separator, and the enthalpy spraying compressor is provided with an exhaust port, an air return port and an enthalpy spraying port. The evaporation assembly comprises a fin type heat exchanger with a fan, the fin type heat exchanger is provided with a supercooling heat exchanger, and an exhaust port of an enthalpy spraying compressor, a four-way valve, a first-stage heat exchanger, a first-stage throttler, the fin type heat exchanger, a separator and an air return port of the enthalpy spraying compressor are communicated and form a first-stage refrigerant circulation main path. And enthalpy spraying openings of the first-stage heat exchanger, the supercooling heat exchanger and the enthalpy spraying compressor are communicated and form an air suction loop. The environment sensible heat is fully utilized for heat exchange, the preheating effect is remarkable, a traditional electric auxiliary heating mode is replaced, the energy utilization rate is increased, the use cost is reduced, meanwhile, freezing and icing are effectively prevented, and the device is suitable for being used in the ultralow-temperature environment.

The invention discloses a vehicle thermal management system and a control method thereof, a vehicle and a storage medium, and relates to the technical field of vehicles, the vehicle thermal management system comprises an electric drive water way, a coupling water way system and a heat pump system, and the heat pump system comprises a refrigerant loop and an air conditioner water way; the refrigerant loop and the air-conditioning waterway are respectively provided with a cabin heat exchanger, and the refrigerant loop is in heat exchange connection with a battery; the coupling water path system comprises an engine water path, a heat exchange water path and an air conditioner water path which are connected with one another, and the heat exchange water path, the electric drive water path and the refrigerant loop are all in heat exchange connection through a heat exchange device. The invention aims to improve the heating energy efficiency of the vehicle.

The utility model provides a direct-current variable-frequency high-temperature heat pump system which comprises a first-stage heat pump system, a second-stage heat pump system and a water supply system which is respectively connected with the first-stage heat pump system and the second-stage heat pump system. An intermediate heat exchanger capable of overlapping the first-stage heat pump system and the second-stage heat pump system and enabling heat absorbed by the first-stage heat pump system to be transmitted to the second-stage heat pump system is connected between the first-stage heat pump system and the second-stage heat pump system, and the intermediate heat exchanger is connected with a refrigerant storage circulation branch for the first-stage heat pump system to store part of refrigerant. The refrigerant circulation branch is connected to the first-stage heat pump system, the first-stage heat pump system is connected with an enhanced vapor injection loop, and the second-stage heat pump system is provided with an economizer used for supercooling heat exchange with the enhanced vapor injection loop. The two-stage cascade heat pump system adopting the structure is high in operation stability, the heating energy efficiency is greatly improved, the system performance is improved, and high-temperature hot water can still be continuously discharged in a low-temperature environment.

The application relates to the technical field of heat pumps, and particularly discloses a water pan anti-freezing device, a water pan anti-freezing method and a heat pump system. The device comprises a first heat exchange assembly, a second heat exchange assembly, a first distributor and a second distributor. The first heat exchange assembly comprises a first heat pipe condenser, a first refrigerant input pipeline, a first heat pipe evaporator and a first refrigerant output pipeline. The first heat pipe condenser is used for heat exchange connection with a first water pan, and the first heat pipe evaporator is used for heat exchange connection with a first control mainboard. The second heat exchange assembly comprises a second heat pipe condenser, a second refrigerant input pipeline, a second heat pipe evaporator and a second refrigerant output pipeline. The second heat pipe condenser is used for heat exchange connection with a second water pan, and the second heat pipe evaporator is used for heat exchange connection with a second control mainboard. The first distributor is used for distributing the flow of refrigerant medium to the first heat pipe condenser and the second heat pipe condenser. The second distributor is used for distributing the flow of refrigerant medium to the first heat pipe evaporator and the second heat pipe evaporator. The water pan anti-freezing device has good anti-freezing effect on the water pan and is energy-saving and environment-friendly.

The invention relates to the technical field of casting machines, in particular to a casting machine head heating device which comprises a heat preservation shell, the heat preservation shell is used for wrapping the periphery of a casting machine head, a plurality of heating rods are arranged in the heat preservation shell and used for heating the casting machine head, and a supporting assembly is arranged in the heat preservation shell and used for supporting the casting machine head. The supporting assembly is used for supporting the multiple heating rods, so that the heat preservation shell can be evenly distributed when installed on the periphery of the machine head of the casting machine, heating dead corners and temperature differences caused by asynchronous installation of a traditional device are reduced, it is ensured that the overall temperature of the machine head is balanced, the problems that due to local cooling, fluidity of materials becomes poor, and solidification and blockage occur are solved, and the casting quality is improved.