44results about How to "Increase condensing pressure" patented technology

The invention relates to a waste heat recovery system of a marine diesel engine, specifically to a waste heat power generation system of a marine diesel engine based on the organic Rankine cycle, comprising a waste gas boiler which is installed on a ship and takes the waste heat of the marine diesel engine as a heat source. The waste gas boiler is equipped with an evaporator which takes hot water in the boiler as a heat source, wherein the evaporator can heat an organic working medium circulating through the evaporator and generate steam. A medium steam outlet of the evaporator passes through a steam turbine and connects to a booster pump inlet through a cooling medium reflux inlet of the steam turbine, and a booster pump outlet is connected to a medium inlet of the evaporator. The steam turbine drives a generator to make electricity. The waste heat power generation system provided by the invention can improve the efficiency in utilizing the waste heat of marine diesel engines, having a compact structure and reliable operation.

The invention relates to an electric car heat pump air-conditioning system with an adjustable refrigerant charging amount, and belongs to the technical field of air-conditioning and cars. According to the electric car heat pump air-conditioning system, the rotary speeds of a compressor, an external heat exchanger fan and an internal heat exchanger fan can be adjusted at any time according to temperature signals of an external temperature sensor and an internal temperature sensor, therefore the system is enabled to be in an optimal working condition; a two-position three-way solenoid valve can be switched according to a pressure signal of an exhaust pressure sensor of the compressor to achieve storage and release of a refrigerant so as to achieve matching of refrigerant charging amounts in refrigerating and heating modes; a system condensing pressure is reduced in the refrigerating mode to achieve a pressure protection effect; and the system condensing pressure is increased in the heating mode to increase the system heating capacity and improve the heating efficiency of a heat pump air conditioner. Therefore, the energy consumption is reduced, the travel distance of an electric car is prolonged, and an application of the electric car is promoted.

The process of recovering organic matter component from exhaust organic gas is suitable for the conditions of relatively small exhaust amount to be recovered and treated, relatively high flow and concentration fluctuation, and dispersed exhaust source. The recovering and treating system includes site parts and movable part. The site parts are set in the gas exhaust sites to accept exhausted gas and adsorb the organic component onto the adsorbent. The movable part may be used to desorb and regenerate saturated absorbent and collect desorbed organic component for several site parts.

The invention relates to the technical field of air conditioners, in particular to a return oil control method for an air conditioner, and is intended to solve the problem that an existing technical scheme to improve the return oil effect of a fixed frequency compressor is unable to basically solve the poor return oil issue. To this end, the return oil control method for the air conditioner comprises: calculating compression ratio E and/or suction vapor overheat delta T of a fixed frequency compressor; if the compression ratio E is less than minimum allowable compression ratio Emin and/or thesuction vapor overheat delta T is less than zero, controlling the air conditioner to enter a return oil mode. During operation of the fixed frequency compressor, when the compression ratio E is less than the minium allowable compression ratio Emin and/or the suction vapor overheat delta T is less zero, the air conditioner is controlled to enter the return oil mode; through the above control manner, the return oil control method for the air conditioner can provide improved return oil effect for the compressor, reduced failure rate for the compressor and extended life for the compressor.

The invention discloses an outdoor unit refrigerant pipeline system, an air conditioner and a refrigeration control method for the air conditioner. The outdoor unit refrigerant pipeline system comprises a compressor, an outdoor heat exchange device and a first throttling device and further comprises a supercooling heat exchange device and a bypass. The supercooling heat exchange device comprises a first heat exchange assembly, a second heat exchange assembly and a second throttling device. One end of the bypass is connected with an exhaust opening of the compressor, and the other end of the bypass is connected with the first end of the first heat exchange assembly. The bypass is provided with a first electromagnetic valve. According to the outdoor unit refrigerant pipeline system, the air conditioner and the refrigeration control method for the air conditioner, the supercooling heat exchange device and the bypass are arranged, when low-temperature refrigerating is conducted, the first electromagnetic valve on the bypass is started, and the supercooling heat exchange device is directly connected with the exhaust opening of the compressor; then, refrigerants discharged out from the exhaust opening directly enter the supercooling heat exchange device which is used as a condenser, the condensing pressure can be improved effectively, and the operating stability of the outdoor unit refrigerant pipeline system is ensured.

A vehicle air conditioning apparatus can ensure that the temperature of the air supplied to the vehicle interior is a preset temperature by securing the quantity of heat release for the radiator during a cooling and dehumidifying operation. The valve opening of the condensing pressure regulating part of the first control valve is smaller when the calculated opening SW of the air mix damper is equal to or more than the predetermined value than when the opening SW is smaller than the predetermined value. Accordingly, when the quantity of heat release is not sufficient in the radiator, it is possible to increase the condensing pressure of the refrigerant in the radiator to raise the temperature of the refrigerant in the radiator. Consequently, it is possible to secure the amount of heating, and therefore to ensure that the temperature of the air supplies to the vehicle interior is a preset temperature.

The invention provides a control method and device for an electronic expansion valve at an indoor unit evaporator inlet. The method comprises the steps that the system capability requirement and the system indoor unit starting capacity are acquired; the electronic expansion valve at the indoor unit evaporator inlet is controlled according to the system capability requirement; or the electronic expansion valve at the indoor unit evaporator inlet is controlled according to the system indoor unit starting capacity. According to the control method and device for the electronic expansion valve at the indoor unit evaporator inlet, the condensation pressure of a condenser is increased and the heat exchange efficiency of the condenser is enhanced by controlling the electronic expansion valve at the indoor unit evaporator inlet, therefore, the supercooling degree of an outlet of the condenser is improved, the refrigerant flowing speed is promoted, the refrigerant flowing uniformity is improved,and then the refrigerant flowing noise of an indoor unit is reduced.

Adsorption process is adopted in recovering hydrocarbon component from hydrocarbon containing gas. The working day is divided into two job stages, in the first stage, the first adsorption tank is in adsorption state while the second one in regeneration state; and in the second stage, the second adsorption tank is in adsorption state while the first one in regeneration state. These two long job stages are utilized fully for vacuum and stripping desorption regeneration of these two adsorption tanks and recovering the desorbed hydrocarbon component. Prolonging the desorption regeneration time can reduce the size of the regeneration and recovery parts, lower the investment and the running power consumption.

The invention relates to a cool double-effect lithium bromide spray absorption type refrigeration cycle system. A refrigerant water passage of a condenser is divided into three paths; in the first path, the condenser is communicated with an evaporator; in the second path, one end of the second refrigerant water passage is communicated with the condenser, and the other end of the second refrigerant water passage passes through a first absorber to be communicated with a second absorber; in the third path, a liquid storage device is communicated with the condenser, one end of a second connecting pipe is communicated with the liquid storage device, the other end of the second connecting pipe is communicated with a boiler, one end of a first connecting pipe is communicated with a boiler, the other end of the first connecting pipe is communicated with the condenser, the other end of the connecting pipe is communicated with an ejector, one end of a first refrigerant water vapor pipeline is communicated with the ejector, the other end of the first refrigerant water vapor pipeline is communicated with a generator, the first absorber is communicated with an evaporator, one end of a medium concentration solution pipeline is communicated with the first absorber, the other end of the medium concentration solution pipeline is communicated with the second absorber, one end of a first dilute solution pipeline and one end of a first concentrated solution pipeline are both communicated with the second absorber, and the other ends of the first dilute solution pipeline and the first concentrated solution pipeline are both communicated with the generator. The system is used in an absorption type water source heat pump system.

The invention discloses a control method for the rotating speed of an outdoor fan of an air conditioner, the air conditioner and a storage medium. The method comprises the steps that the pipe temperature of a first inner pipe at the current moment is recorded when the operation of the air conditioner meets a differential pressure condition and the current operation frequency reaches a preset threshold value, and the rotating speed of the outdoor fan of the air conditioner is reduced by one preset value; the pipe temperature of a second inner pipe is recorded after the rotating speed of the outdoor fan of the air conditioner is reduced, and when the difference value between the pipe temperature of the first inner pipe and the pipe temperature of the second inner pipe is larger than or equalto a first preset temperature value, the operating frequency reduced by one preset value is kept unchanged. According to the control method for the rotating speed of the outdoor fan of the air conditioner, the air conditioner and the storage medium, the condensing pressure is increased by reducing the rotating speed of the outdoor fan of the air conditioner, and the pressure difference is increased, so that the refrigerant flow is increased; and the optimal rotating speed value is determined by reducing the pipe temperature of the inner pipes before and after the rotating speed of the outer fan is reduced, and therefore the refrigerating capacity is improved.

The invention relates to low temperature stage mixed refrigerant applicable to two-stage cascade refrigeration systems. The mixed refrigerant comprises ethane and monofluoro-methane, and is formed through physical mixture, wherein the molarity of ethane is 50 to 75 percent, and the balance is monofluoro-methane. The mixed refrigerant can also comprises ethane, monofluoro-methane and perfluoroethane, and is formed through physical mixture, wherein the molarity of ethane is 40 to 70 percent; the molarity of monofluoro-methane is 5 to 40 percent; the balance is perfluoroethane. The mixed refrigerant has high efficiency and high evaporation pressure, as well as good refrigeration capacity under the same compressor displacement, has zero ODP, greatly decreases GWP than R503 and R508B, and has good intersolubility with lubricating oil.

The invention relates to an ORC magnetic levitation power generation system capable of achieving gradient utilization of residual pressure of medium and low temperature geotherm. The ORC magnetic levitation power generation system comprises an evaporator for evaporating a working medium, a condenser for condensing the working medium, cooling equipment for cooling the condenser, and a power generator; the power generator comprises a primary turbine and a secondary turbine; the cooling equipment is connected with the secondary turbine; a working medium steam outlet of the evaporator is connectedwith an inlet of the power generator; an outlet of the power generator is connected with the condenser; and an outlet of the condenser is connected with a liquid working medium inlet of the evaporator. The gaseous working medium respectively performs expansion work in the two turbines, wherein the priamry turbine drives the power generator to generate power through a coupling; the secondary turbine drives an impeller to rotate through the coupling to accelerate an air flow on the surface of the condenser, strengthen the heat exchange capacity of the condenser and reduce the condensation temperature and condensation pressure, so that the pressure difference and temperature difference between the inlet and the outlet of the magnetic levitation power generator are increased and the power generation efficiency of the magnetic levitation power generator is improved.

According to the air conditioning system and the control method, an outdoor unit liquid storage device, an indoor unit liquid storage device and a heating belt are designed, a refrigerant in the outdoor unit liquid storage device enters the indoor unit liquid storage device through a by-pass pipe, the refrigerant in the indoor unit liquid storage device is heated through the heating belt, the pressure of the refrigerant in the indoor unit liquid storage device is increased, namely, the condensing pressure of the system is increased, and the air conditioning efficiency is improved. Smooth starting and normal operation of the air-conditioning system are guaranteed, and ultralow-temperature normal operation of the air-conditioning system is achieved.

A condenser (100), comprising a shell (112), an inlet pipe (120), and an anti-impact plate (204). The shell (112) has an accommodating cavity (202). The inlet pipe (120) is a circular pipe having a gradually increasing inner diameter from the inlet to the outlet. The inlet pipe (120) is arranged to pass through the upper end of the shell (112), the outlet of the inlet pipe (120) being accommodated in the accommodating cavity (202). The anti-impact plate (204) is accommodated in the accommodating cavity (202), and the anti-impact plate (204) is positioned below the outlet of the inlet pipe (120). There is a gap between the anti-impact plate (204) and the outlet through which fluid flowing from the outlet can flow. The condenser (100) can reduce the friction loss and local resistance of the refrigerant gas flowing into the inlet pipe (120), such that the dynamic pressure of the refrigerant gas entering the condenser (100) is partially converted into static pressure, and reduce the static pressure loss of the refrigerant gas entering the cylinder from the inlet, thereby increasing the condensing pressure of the refrigerant gas in the condenser (100) to enhance the heat exchange performance.