34results about How to "Guaranteed heating capacity" patented technology

The invention discloses a frostless air handling unit and a proportion-integration-differential control method of the frostless air handling unit. The frostless air handling unit comprises a circulating working return circuit and a controllable silicon power adjuster, wherein the circulating working return circuit is composed of a compressor assembly, a condenser, an electronic expansion valve and an evaporator assembly, the compressor assembly, the condenser, the electronic expansion valve and the evaporator assembly are sequentially connected along the refrigerating fluid flowing direction. When a calculation controller receives an outdoor temperature parameter transmitted by a temperature-humidity sensor and the temperature parameter is lower than 0 DEG C, the calculation controller carries out calculation according to received air temperature and humidity parameters, an air pressure parameter and an evaporator surface temperature parameter, controls the opening degree of the electronic expansion valve according to the calculation results, and adjusts evaporator surface temperature through increase or reduction of the opening degree of the electronic expansion valve. Meanwhile, the controllable silicon power adjuster judges an air suction superheat degree of a compressor through received compressor air suction temperature and air suction pressure, adjusts increase or reduction of electric heater power, and maintains the air suction superheat degree of the compressor to be kept in a preset value range. According to the frostless air handling unit and the proportion-integration- differential control method of the frostless air handling unit, the aim of maintaining safe and high-efficiency operation of the system is achieved.

The invention discloses a frost-less air-source heat pump hot water unit and a proportional-integral-differential control method for the same. The proportional-integral-differential control method includes performing computation according to received air temperature and humidity parameters, received air pressure parameters and received surface temperature parameters of an evaporator when outdoor temperature parameters which are transmitted by a temperature and humidity sensor and are received by a computation controller are lower than 0 DEG C, controlling the opening of an electronic expansion valve according to a computation result and regulating the surface temperature of the evaporator by means of increasing or reducing the opening of the electronic expansion valve so that the surface temperature of the evaporator is constantly higher than a frost formation point; and enabling a silicon-controlled power regulator to judge a suction superheat degree of a compressor according to received suction temperature and suction pressure of the compressor, increasing or reducing the power of an electric heater and maintaining that the suction superheat degree of the compressor only varies within a set value range. The frost-less air-source heat pump hot water unit and the proportional-integral-differential control method have the advantage that adjustment for the opening of the electronic expansion valve is matched with adjustment for the power of the electronic heater, so that the purpose of maintaining safe and efficient running of a system is achieved.

The invention discloses a transcritical CO based on a precooler 2 The heat pump system and the waterway two-way valve control method, the conventional transcritical CO 2 The heat pump system is assisted by a pre-cooler system; the circulating water circuit is divided into two parts in the system through the three-way water diversion valve and the three-way water collection valve, and connected by the two-way water channel regulating valve and the water channel bypass valve; The ambient temperature sensor, evaporator fin temperature sensor and evaporation pressure sensor are used, and the programmable logic controller is used as the core of acquisition, calculation and control. Through the above system configuration and a well-developed joint control method of temperature, pressure and time, transcritical CO 2 The promotion of heat pump systems to the heating field can make up for the impact of high return water temperature on transcritical CO 2 System performance degradation, proper control of units entering and exiting defrost, and addressing transcritical CO 2 The heat pump system stops heating during a relatively long defrosting time, and the average temperature of the circulating water system drops rapidly.

The invention relates to the technical field of air conditioning control, in particular to an air conditioner defrosting control method and device. The air conditioner defrosting control method comprises the steps that S0, an air conditioner enters a defrosting mode; S1, defrosting is conducted by selecting a to-be-defrosted heat exchange branch from a plurality of heat exchange branches connected in parallel, the defrosted heat exchange branch communicates with a refrigerant pipeline of an air conditioner, and the rest of the heat exchange branches are disconnected with the refrigerant pipeline; S2, the actual pressure of the defrosted heat exchange branch is obtained; S3, the actual pressure of the defrosted heat exchange branch is compared to the preset pressure of the heat exchange branch, if the actual pressure of the defrosted heat exchange branch is higher than the preset pressure of the heat exchange branch, defrosting is completed, and the step S4 is carried out, and otherwise, the step S2 is conducted; S4, whether a to-be-defrosted heat exchange branch exists is judged, if yes, the process returns to step S1, and if defrosting of all the to-be-defrosted heat exchange branches is completed, the step S5 is conducted; and S5, the defrosting mode of the air conditioner is stopped. Defrosting is thorough, and the defrosting speed is high.

The invention discloses a heat pump humidifying device and a working method. The device comprises: a heat pump system, a solar heat collector and a spray air supply system. The method is based on the atmospheric temperature T 0 and the inlet and outlet water temperature difference ΔT of the solar heat collector are divided into three working modes, namely: A, T 0 ≥15℃, △T≥30℃ working mode, B, T 0 ≥15°C, △T<30°C working mode, C, T 0 <15°C, △T<30°C working mode; the invention couples the heat pump technology with the solar heat collection technology, realizes the series / parallel operation of the heat pump and the solar heat collector, and improves the steam production and production efficiency; compared with the existing With a humidifying device, the present invention has many advantages of high steam output, good energy efficiency, economical operation and wide application range.

The invention relates to a screw extractor, in particular to a heating vibration screw extractor. The invention solves the problem that the existing screw extractor is hard to disassemble some shaft fastening pieces with tight fitness. The heating vibration screw extractor comprises a mandrel and a falcula connected with the mandrel, wherein a vibrator with adjustable vibration frequency is arranged on the top of the mandrel; the screw extractor also comprises a group of high frequency induction heaters, wherein a magnet is arranged on one end of each high frequency induction heater. When in use, the high frequency induction heaters heat the outer surfaces of the parts to be disassembled so as to reduce the interference degree between the parts to be disassembled; and the parts to be disassembled perform strong resonance vibration under the action of the vibrator so as to greatly reduce the friction force between the parts to be disassembled. In order to solve the situation that the friction force between the parts to be disassembled is too large, the vibrator is installed on the mandrel of the screw extractor of the invention to perform forced vibration of the parts to be disassembled and the heating device is added on the screw extractor, thus greatly reducing the friction force between the parts to be disassembled and solving the condition that the original screw extractor is hard to be used for disassembly.

A water-cooling heat pump typed multi-connected air-conditioning unit comprises a compressor, an oil separator, a four-way valve, an outdoor heat exchanger, an outdoor electronic expansion valve, a liquid receiver, a liquid valve, a gas valve, a plurality of indoor electronic expansion valves, a plurality of indoor heat exchangers and a gas-liquid separator which are connected through pipes. The multi-connected air-conditioning unit is characterized in that the outdoor heat exchanger is a water-cooling heat exchanger; the pump unit comprises an oil-return device in the outdoor heat exchanger,and a subcooler. The outdoor heat exchanger of the invention adopts a water-cooled heat exchanger, which significantly increases the energy efficiency ratio of the pump unit, reduces the external dimension of the pump unit. The oil-return device in the outdoor heat exchanger ensures the pump unit to have good oil-return characteristics in thermo-producing conditions, thus realizing the safe and reliable running of the pump unit. The subcooler can prevent instantaneous vaporization of the refrigerant during long-range transmission, thus maintaining the stable and reliable economic running of the pump unit under high head drop of a long connecting pipe.

The invention provides a heat storage type air source heat pump water cooling and heating system and an operation method thereof, and belongs to the field of heat pump technologies and refrigerating air conditioners. The system comprises an outdoor source side, a heat pump host, a user side and a heat storage module. The outdoor source side comprises a refrigerating medium pump, an air cooling heat exchanger and source side valves. An outlet of the refrigerating medium pump is sequentially connected with the air cooling heat exchanger and the source side valves through pipelines and then returns to an inlet of the refrigerating medium pump through a first liquid cooling type heat exchanger of the heat pump host. A heat storage side mainly comprises a first valve, a second valve, a heat storage box, a third valve and a fourth valve. One side of the heat storage box is sequentially connected with the first valve and the source side valves on the source side through pipelines and then returns to the heat storage box through the second valve. The other side of the heat storage box is sequentially connected with the third valve and the user side valve on the user side through pipelines and then returns to the heat storage box through the fourth valve. By adopting the heat storage type air source heat pump water cooling and heating system, the capacity of a heat pump system supplying heat in winter can be greatly reduced, the primary investment is lowered, and the operation efficiency of the heat pump is improved.

The present invention proposes an air conditioning system, its control method and device, and storage medium. The refrigerant inlet of each indoor unit is provided with a first electronic expansion valve. The outdoor unit includes an outdoor heat exchanger and a first compressor. For compressing the first cold medium, the second compressor of the hydraulic module is used to compress the second cold medium, and the outlet of the outdoor heat exchanger is connected to the inlet of the first cold medium of the first heat exchanger. The control method includes the following steps: identification The air conditioning system is mainly in cooling operation, and the indoor unit in heating operation is used as a candidate indoor unit; the condensation temperature of the candidate indoor unit is detected, and the candidate indoor unit with insufficient heating capacity is obtained according to the condensation temperature; the candidate indoor unit with insufficient heating capacity As the target indoor unit, and perform heating protection for the target indoor unit; control the second compressor to reduce to a preset frequency and control the second electronic expansion valve to reduce to a preset opening to ensure the heating capacity of the heating indoor unit.

The invention relates to an air-cooled PVT air conditioner outdoor unit and its operation method. The air-cooled PVT outdoor unit includes a fan, a PVT condensation / evaporation coil branch, a PVT heat exchange plate, a conventional condensation / evaporation coil branch, and a PVT Water coil. Combining the air conditioner condenser / evaporator and PVT components, integrating the entire outdoor unit to work and install together, making full use of daytime solar energy and nighttime long-wave radiation energy, and adopting different cooling / heating / power supply schemes for different seasons and time periods, to achieve The advantages of PVT components and the condenser / evaporator of the air conditioning unit complement each other to improve the utilization rate of the system throughout the year and around the clock. In the present invention, the PVT assembly and the air-cooled outdoor unit can work independently and jointly, which is more convenient to ensure the cooling / heating capacity of the system in all seasons and different outdoor environments, and achieve the purpose of energy saving.