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 discloses an air conditioner capable of improving low-temperature heating capacity, comprising a compressor and an air-supplying enthalpy-increasing device connected between an exhaust pipe and a return pipe of the compressor. The exhaust pressure is improved through an air-supplying enthalpy-increasing circuit under low outdoor ambient temperature so as to improve low-temperature heating capacity and obtain better low-temperature heating effect. The invention also discloses a control method of the air conditioner capable of improving the low-temperature heating capacity. When the outdoor ambient temperature is lower than a certain temperature t1, the air-supplying enthalpy-increasing device is turned on, the high-pressure high-temperature gas in the exhaust pipe of the compressor is changed into the low-pressure high-temperature gas after pressure reduction through the air-supplying enthalpy-increasing circuit; the low-pressure high-temperature gas returns to a return air inlet of the compressor through the air-supplying enthalpy-increasing circuit; because relative high-temperature gaseous refrigerant at the return air inlet of the compressor is increased, the return pressure of the compressor rises, and the exhaust pressure further rises. In the invention, the exhaust pressure rises, the condensing pressure is improved, the condensing temperature is improved, and the heating capacity is increased.

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 invention provides a variable frequency air conditioner and a control method thereof. The control method of the variable frequency air conditioner comprises the following steps: acquiring exhaust temperature of a compressor of the variable frequency air conditioner; judging whether the exhaust temperature of the compressor is less than a preset temperature threshold; and if so, carrying out repeated switching operation on the outdoor fan of the variable frequency air conditioner in the preset period. According to the variable frequency air conditioner, when APF energy efficiency testing is performed, the heat exchange air flow of the air conditioner outdoor unit heat exchanger is reduced, thereby enhancing the exhaust temperature and condensing pressure of the compressor; and thus, the compressor operates under reasonable compression ratio, so that the energy consumption of the air conditioner is enhanced, and the exhaust temperature fluctuation is reduced, thereby avoiding the abnormal sound of the compressor and enhancing the stability of the air conditioner during APF energy efficiency testing.

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.

The invention provides an air conditioner control method. In a heating mode, acquiring the outdoor environment temperature T of the outer ring, the outer disk temperature change value delta T the outer disc; according to the acquired outdoor environment temperature T of the outer ring, the outer disk temperature change value delta T of the air conditioner outer disc judging whether frosting; whenjudging that the air conditioner is frosted, control the opening degree of an expansion valve open large upsilon according to a certain speed rate, wherein the speed rate based at least on the outer disc is the temperature change value delta T outer disc into index change. Thus, in the detected by frosting of the outdoor condenser, the expansion valve opening degree of severity of the frosting time response adjustment, refrigerant flow is increased, thereby increasing the system pressure, evaporation and condensation, thereby inhibiting frosting process for inhibiting air-conditioning heatingcapacity attenuation.

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.

The invention discloses an independent temperature and humidity control air conditioner system. The independent temperature and humidity control air conditioner system comprises an absorption-compression composite refrigerating system, a solution dehumidification circulatory system and a chilled water system. Sensible heat loads and latent heat loads of air can be borne by the absorption-compression composite refrigerating system and the solution dehumidification circulatory system respectively to achieve independent temperature and humidity control over the indoor air. By increasing the evaporation temperature of absorption type refrigeration and enlarging the deflation range of absorption type refrigeration, the absorption type refrigeration cycle energy efficiency ratio is increased. In addition, the absorption-compression composite refrigerating system can reasonably adjust the generation temperature and condensation temperature, reduce the generation pressure and temperature by consuming a small amount of electric energy, decrease the generation temperature on the basis of ensuring the refrigeration effect and enlarges the utilization range of a low-temperature heat source; and meanwhile, a compressor is used for increasing the condensation pressure of the composite refrigerating system to increase the condensation temperature, and all condensation heat is recycled to be used for regenerating a dilute solution of the solution dehumidification circulatory system. The method can decrease the generation temperature of the absorption type refrigerating system, increase the evaporation temperature and greatly improve the system energy efficiency on the basis of ensuring the air conditioning effect.

The invention relates to the technical field of air-conditioner devices, and discloses an air-conditioner device which comprises a shell, an outdoor heat exchanger, an outdoor volute, an indoor heat exchanger, an indoor volute and a compressor, wherein the outdoor heat exchanger, the outdoor volute, the indoor heat exchanger, the indoor volute and the compressor are arranged in the shell. Outdoor fan blades are arranged in the outdoor volute and correspond to the outdoor heat exchanger, an indoor wind wheel is arranged in the indoor volute and corresponds to the indoor heat exchanger, and a wind deflector is arranged between the outdoor volute and the outdoor heat exchanger. Outdoor condensation temperature and condensation pressure are increased in a low-temperature environment, so that the temperature of the outdoor heat exchanger is increased, and an air-conditioner system normally and continuously runs. The air-conditioner device has the advantages of simple structure, convenience in use and the like.

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 discloses an air conditioner, comprising a throttling device. The throttling device is provided with a cooling capillary tube and a heating capillary tube, the heating capillary tube is parallelly connected with a one-way valve and then serially connected with the cooling capillary tube, the direction of the one-way valve is the same with the flow direction of the refrigerant in the cooling capillary tube; the throttling device also comprises at least one auxiliary heating throttling branch which is provided with an auxiliary heating capillary tube and a controllable valve connected with each other in parallel; the heating capillary tube is serially connected with the auxiliary heating capillary tube branch and then parallelly connected with the one-way valve. By adopting the invention, the air conditioner can improve the low temperature heating performance under the prerequisite of satisfying the cooling and heating performance of the air conditioner at the same time.

The invention provides a high-temperature heat pump drying machine started with heating and operating in a high heating load state. The machine comprises a heat pump drying system, a wind inlet passage, a wind outlet passage, and a drying chamber for connecting the wind inlet passage with the wind outlet passage; the heat pump drying system comprises a condenser arranged in the wind inlet passage, and an evaporator arranged in the wind outlet passage; a heater is arranged between the condenser and the drying chamber; air enters from a wind inlet of the wind inlet passage, and becomes high-temperature dried air after passing through the condenser and the heater in sequence, and then the high-temperature dried air is conveyed into the drying chamber and is used for drying operation and turned into humid air; the humid air is discharged and is guided onto the evaporator, and after moisture in the humid air is condensed, the air is discharged through the wind outlet passage. The heater is additionally arranged for increasing the drying operation starting speed of the drying system and the temperature of the dried air and improving the heat and mass transfer intensity of the drying operation, so that the heat absorption intensity of the evaporator is improved; moreover, the heat absorption intensity of the evaporator is improved, so that the heat release intensity of the condenser is improved, and the heat pump drying system can enter a high heating load operation state.

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 refrigeration cycle system of a lithium bromide jetting and absorbing type for condensation boosting, and relates to an absorption refrigeration cycle system. A condenser is communicated with an evaporator through a first refrigerant passage, the evaporator is communicated with an absorber through a second refrigerant steam pipeline, one ends of a first dilute solution pipeline and a first concentrated solution pipeline are both communicated with the absorber, and the other ends of the first dilute solution pipeline and the first concentrated solution pipeline are both communicated with a generator; a solution heat exchanger is arranged on the first dilute solution pipeline and the first concentrated solution pipeline; one end of a first connecting pipe is communicated with an ebullator, and the other end of the first connecting pipe is communicated with an ejector; one end of the first refrigerant steam pipeline is communicated with the generator, and the other end of the first refrigerant steam pipeline is communicated with the ejector; one end of a third connecting pipe is communicated with the condenser, and the other end of the third connecting pipe is communicated with the ejector; one end of a second connecting pipe is communicated with the ebullator, and the other end of the second connecting pipe is communicated with a solution storing device which is arranged below the condenser; a refrigerant pump is arranged on the second connecting pipe. The cycle system disclosed by the invention is used for 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.