5results about How to "Increase evaporating pressure" patented technology

The application relates to a fresh air dehumidification heat pump system based on a new compressor series-parallel transformation step suction and exhaust, a refrigerant circulation flow path comprising a first air inlet coil, a first throttling device, a supply air coil, a first check valve, a return air coil, an exhaust air coil, a first four-way reversing valve and a first compressor which are sequentially connected; further comprising a second four-way reversing valve, a second compressor, a second air inlet coil and a second throttling device which are sequentially connected; further comprising a second check valve which is connected in parallel to the two ends of the supply air coil and the first check valve; the transformation of the series-parallel relationship of the compressors in the cold / heat mode is realized through the first four-way reversing valve and the second four-way reversing valve, so that the step suction / step exhaust forms correspondingly. Compared with the prior art, the two four-way reversing valves are switched skillfully, the switching of the two compressors in series and parallel is completed in the refrigeration and heating modes, and the switching of the step suction and the step exhaust is further realized, so that the unit performance is improved.

The utility model belongs to the field of heat management technology discloses an indirect heat management system based on hot water backflow, this heat management system includes compressor, high pressure water heat exchanger, low pressure water heat exchanger, PTC heater and first three -way valve, through increasing first three -way valve connecting pipeline between high pressure water heat exchanger and low pressure water heat exchanger, the working medium after PTC heater heating enters low pressure water heat exchanger through first three -way valve, thereby make the evaporation pressure of the working medium that enters compressor under extremely low temperature environment improve, avoid the forced shutdown of compressor due to the evaporation pressure below the protection threshold of compressor, make compressor still can keep the stability of operation in extremely low temperature environment. And, only through increasing first three -way valve and introducing the working medium after PTC heater heating into low pressure water heat exchanger, can realize the improvement of evaporation pressure, make the whole heat management system simple structure, low in cost, high stability.

The present application relates to heat exchanger performance testing technical field, specifically to a kind of ORC system condenser thermal performance testing device and testing method.The ORC system includes condenser to be measured, working medium storage tank, cooling water tank;From working medium storage tank side, working medium inlet pipeline is sequentially provided with evaporator and pressure regulating valve;Cooling water tank is connected with the cooling system of working medium storage tank by cold water main, and test water circulating pump is arranged on cold water inlet pipeline, and between test water circulating pump and condenser to be measured, cold water inlet pipeline is also connected with the cooling system of working medium storage tank by cold water branch;Cold water inlet pipeline and cold water branch are respectively provided with cut-off valve for adjusting the flow direction of cold water, and working medium storage tank is connected with pressure regulating system, and evaporator is connected with heat regulating system.The testing device provided by the present application can carry out wide-range, multi-condition ORC condenser testing work, and can meet the thermal performance testing requirements of condenser in ORC system.

The present application belongs to the technical field of air conditioning and building design, and more particularly relates to a three-dimensional air supply air conditioner host and equipment platform. The air conditioner host comprises a finned tube heat exchanger assembly, a shell, an air conditioner compressor, a gas-liquid separator and a fan; the finned tube heat exchanger assembly comprises at least two finned tube heat exchangers, the finned tube heat exchanger comprises a horizontal C-shaped finned tube heat exchanger and / or a vertical V-shaped finned tube heat exchanger; all the finned tube heat exchangers of the finned tube heat exchanger assembly are connected with the same air conditioner compressor. At least one air conditioner host is arranged in the equipment platform in the transverse direction; the equipment platform is provided with an outer facade for ventilation, and the air inlet and air distribution channel of the air conditioner host is close to the outer facade; the air conditioner host is provided with an air outlet chamber above, and the air outlet of the air outlet chamber is arranged and / or close to the outer facade. The present application constructs an air conditioner host high-efficiency heat exchange air path structure to improve the energy density; facilitates the detection and maintenance of the air conditioner host; and realizes the construction of a side-in and side-out air path structure of the outer facade of the equipment platform.

This application provides a refrigeration system and refrigeration equipment. The refrigeration system includes: a compressor; a condenser, the inlet of which is connected to the compressor's discharge pipe; a refrigeration evaporator for cooling the freezer compartment; a cryogenic evaporator for cooling the cryogenic compartment; a first throttling device connected between the condenser outlet and the refrigeration evaporator inlet; a second throttling device connected between the condenser outlet and the cryogenic evaporator inlet; and an electronically controlled valve including a first valve, a second valve, and a third valve, wherein the first valve is connected to the refrigeration evaporator outlet, the second valve is connected to the cryogenic evaporator outlet, and the third valve is connected to the compressor's intake pipe. When the cryogenic compartment is cooled independently, the refrigeration evaporator can store some refrigerant, reducing the evaporation pressure and temperature within the evaporator, thus facilitating the achievement of lower temperatures. Consequently, the compressor's speed can be reduced, resulting in energy savings.