191results about How to "Reduce condensing pressure" patented technology

Method for the rejection of nitrogen from condensed natural gas which comprises (a) introducing the condensed natural gas into a distillation column at a first location therein, withdrawing a nitrogen-enriched overhead vapor stream from the distillation column, and withdrawing a purified liquefied natural gas stream from the bottom of the column; (b) introducing a cold reflux stream into the distillation column at a second location above the first location, wherein the refrigeration to provide the cold reflux stream is obtained by compressing and work expanding a refrigerant stream comprising nitrogen; and (c) either (1) cooling the purified liquefied natural gas stream or cooling the condensed natural gas stream or (2) cooling both the purified liquefied natural gas stream and the condensed natural gas stream, wherein refrigeration for (1) or (2) is obtained by compressing and work expanding the refrigerant stream comprising nitrogen. The refrigerant stream may comprise all or a portion of the nitrogen-rich vapor stream from the distillation column.

The invention discloses an air conditioner control method and device and an air conditioner. The air conditioner control method comprises the steps that a compressor halt signal sent by a user is received in a compressor operation mode; and the compressor frequency is controlled to be gradually reduced for responding to the compressor halt signal received in the compressor operation mode. Due to the fact that the compressor frequency is slowly reduced under the condition that the compressor halt signal sent by the user is received in the compressor operation mode, condensation pressure is slowly reduced, the front-back pressure difference of a whole electronic expansion valve is slowly changed, and therefore whole machine noise produced during mode switching is reduced.

A high temperature self-adapting air conditioner comprises a refrigerating circle which is composed by a compressor, a condenser, main capillary, an evaporator. The refrigerating circle is parallel connected by a subsidiary throttle sidecut which is composed by a filter, an unloading valve and subsidiary capillary. Due to the subsidiary throttle sidecut, upon the side condenser's pressure exceeds the safety limit, the unloading valve opens and the subsidiary sidecut got through; then the flux index of the capillary will be increased, refrigerant flux will be increased; then lower down the pressure of the condenser; then the compressor will be protected for a continuous running.

A cooling module for a vehicle may include a main radiator, a sub-radiator, a water-cooled condenser and an air-cooled condenser. The main radiator may be disposed at a front region of an engine room and supplies cooled cooling water to an engine. The sub-radiator may be disposed substantially in parallel with the main radiator and in front of the main radiator, have header tanks at both sides and supply the cooled cooling water to an intercooler or electric components. The water-cooled condenser may be disposed in one of the header tanks and primarily condenses a refrigerant by using the cooling water as a heat exchange medium. The air-cooled condenser may be in fluidic communication with the water-cooled condenser to be introduced with the refrigerant condensed in the water-cooled condenser and may be disposed in front of the sub-radiator to secondarily condense the refrigerant.

The invention discloses an air-conditioning system of an automobile for improving the condensing effect by gasifying liquefied natural gas (LNG). An LNG precooler is arranged in front of a condenser. External air passes through the LNG precooler before entering the condenser, and the temperature falls, so that LNG is used for cooling the air passing through the condenser, the condensing effect of a refrigerant in the condenser can be improved, the temperature of the refrigerant at the outlet of the condenser is lowered, the refrigerating quantity and COP (Coefficient Of Performance) of a refrigerating system can be increased, and a small-power compressor and a small condenser can be used.

The invention discloses a refrigerant supercooling heat reusing and recovering air processing unit, an air processing method and an adjusting and control method for all components. The air processing unit comprises a fresh air box, an exhaust air box and a heat pump unit. The fresh air box and the exhaust air box are arranged adjacently. The heat pump unit is arranged in the fresh air box and the exhaust air box. Compared with the prior art, the air processing unit utilizes heat released by refrigerant supercooling under the summer operation working condition, and low-temperature air is heated to the proper air feeding temperature; and the air processing unit utilizes heat released by refrigerant supercooling under the winter operation working condition, outdoor low-temperature air is preheated, return air is prevented from being directly mixed with outdoor fresh air and generating condensed water, and an electric heater which wastes high-grade energy and extra heat sources required by heating of hot water and steam does not need to be arranged; and meanwhile, the heat pump unit of the air processing unit is used for recovering heat of indoor exhaust air, and efficient operation of the air processing unit in summer and winter is achieved.

An environmental-protective cryogen for substituting CFC-12 consists of HFC-161 and1,1-HFC-152a and hydrocarbon, which is selected from one or above one of HC-600a, HC-600 and HC-290. The ODP value of cryogen is zero, GWP value is much less than CFC-12 and HFC-134a. It has excellent environmental and thermal performances, thermal-power parameter, and it saves energy. It can be used for crude HFC-134a, ester oil system, crude CFC-12 and mineral oil system or CFC-12 substitute.

A cooling and heating control method of a multi type air conditioner in which a target pressure of a compressor is adjusted based on conditions of respective indoor units so as to reduce power consumption is provided. The cooling control method includes determining the indoor unit desired to execute power saving control, judging whether or not a difference between a temperature of a space in which the indoor unit desired to execute power saving control is located and a set temperature of the indoor unit is less than a reference value, raising a target evaporation temperature of the indoor unit upon judging that the difference is less than the reference value, comparing an evaporation temperature of the indoor unit with the raised target evaporation temperature, and raising an evaporation pressure of a compressor, when the evaporation temperature of the indoor unit is lower than the raised target evaporation temperature.

The invention discloses a variable frequency fluorine pump air conditioner. The variable frequency fluorine pump air conditioner comprises an air conditioner indoor unit, a variable frequency fluorine pump energy conservation module, an air conditioner outdoor unit and a central controller. The variable frequency fluorine pump energy conservation module comprises a liquid storage tank with an input port connected with a refrigerating fluid refrigeration and circulation output port of the air conditioner outdoor unit, a first branch with one end connected with an output port of the liquid storage tank, and a second branch with one end connected with the output port of the liquid storage tank. The other end of the first branch and the other end of the second branch are both connected to a refrigerating fluid refrigeration and circulation input port of the air conditioner indoor unit. The first branch is provided with a variable frequency fluorine pump and a frequency converter connected with the variable frequency fluorine pump. A sixth branch is further arranged on a compressor inside the air conditioner indoor unit in parallel. One end of the sixth branch is connected to an output port of the evaporator, and the other end of the sixth branch is connected to the refrigerating fluid refrigeration and circulation input port of the air conditioner outdoor unit. According to the variable frequency fluorine pump air conditioner, three refrigeration modes are used in cooperation for running, and the full-year energy efficiency ratio is overall 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 an air conditioner without dripping water. The air conditioner comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, a throttling mechanism, an indoor heat exchanger, a liquid two-way valve, a steam three-way valve, a liquid pipe, a gas pipe, a liquid pipe joint, a gas pipe joint, an indoor unit water basin, a water pipe joint, a water pipe, a water pipe plug connector, a water distributor and an outdoor unit water basin, wherein one end of the indoor heat exchanger is connected with one end of the gas pipe through the gas pipe joint; the other end of the gas pipe is connected with the four-way reversing valve through the steam three-way valve; the other end of the indoor heat exchanger is connected with one end of the liquid pipe through the liquid pipe joint; the other end of the liquid pipe is connected with the throttling mechanism through the liquid two-way valve; the indoor unit water basin is connected to one end of the water pipe through the water pipe joint; the other end of the water pipe is connected with the water distributor through the water pipe plug connector; the outdoor unit water basin is arranged on the lower part of the outdoor heat exchanger. According to the air conditioner, the situation that an adverse effect is caused to the daily life of neighbors downstairs due to water dripping of the air conditioner can be avoided.

The invention discloses an ice storage refrigeration system and a refrigeration method thereof, which relate to the technical field of refrigeration air conditioners. The ice storage refrigeration system comprises a refrigeration unit, a tail end device, an ice making unit, a heat exchange device and an ice storage device, wherein an evaporator of the ice making unit, the ice storage device and acold fluid flow passage in the heat exchange device are connected by a pipeline loop; a hot fluid flow passage in the heat exchange device is connected with the loop of the tail end device via a pipeline; a loop between the condenser of the ice making unit and the evaporator of the refrigeration unit is provided with a pipeline; and the cooling water of the condenser of the ice making unit is supplied after being precooled to 2-20 DEG C by the refrigeration unit. According to the ice storage refrigeration system, the problems that the traditional refrigeration unit can not work under the ice making working condition and a refrigeration unit of double working conditions has big compression ratio, high cost and the like and is complex to control under the ice making working condition are solved, the cost of the refrigeration system can be lowered, and ice making efficiency and operation stability are improved.

The invention provides a laterally-arranged heat pump clothes drying cabinet of a deep dehumidification device. The laterally-arranged heat pump clothes drying cabinet comprises a drying room and a refrigeration and dehumidification device. The refrigeration and dehumidification device is arranged on the side face of the drying room to form a high-position air suction and low-position air exhaust mode or a low-position air suction and high-position air exhaust mode. The drying room air inlet is provided with an air bag, and drying air flows into the drying room through through-holes formed in the air bag. The refrigeration and dehumidification device comprises a first condenser, a second condenser, a third condenser and an evaporator, wherein wet air is divided into two ways, one way of wet air flows through the first condenser and the second condenser to perform heating and temperature rise so as to obtain high-temperature drying air, the other way of wet air flows through the evaporator to perform temperature reduction and passes through the third condenser to perform heating and temperature rise so as to obtain high-temperature drying air, and two ways of drying air are input into the drying room after being mixed. By means of the refrigeration and dehumidification device, the problem that condensation pressure and condensation temperature of a traditional heat pump clothes drying machine at a speed-reduction drying phase are continuously improved, accordingly power consumption, pressure difference and compression ratio of a compressor are improved, energy efficiency ratio is reduced, the working condition is severely worsened, and even the compressor is burned down is solved.

The invention discloses a control method of an air conditioner and the air conditioner, relates to the technical field of air conditioners, and solves the problems that the cost is high, and the stability of the air conditioner is poor when condensing pressure of the multi-connected split air conditioner is reduced. According to the specific scheme, when a heating mode is operated, an operation frequency of a compressor is determined according to the current outdoor environment temperature; the compressor is controlled to operate according to the operation frequency, and an outdoor fan is controlled to operate at a preset rotating speed; and after the compressor runs for a preset time period, the rotating speed of the outdoor fan is adjusted according to the temperature of an indoor coil.The method is used in the process of reducing the condensing pressure of the air conditioner.

The invention discloses a refrigerating system of an air conditioner, which comprises an indoor unit of the air conditioner and an air-cooled condenser, wherein an air exhaust opening of a compressor of the indoor unit of the air conditioner is connected with an air inlet of the air-cooled condenser; and a water-cooled condenser is connected in series to a pipeline between the air exhaust opening of the compressor of the indoor unit of the air conditioner and the air inlet of the air-cooled condenser. By adopting the refrigerating system, the heat exchange efficiency of the refrigerating system of the air conditioner is greatly improved, and condensing pressure and the workload of a condensing fan are reduced, so that high temperature alarming caused by a heat island effect produced by a plurality of outdoor air-cooled condensers is relieved; and meanwhile, the refrigerating system simultaneously has the advantage of noise reduction.

The invention relates to a drying system and method for fruit and vegetable slices by utilizing exhaust steam heat of a residual heat recovery system, and belongs to the field of energy saving. The system comprises a drying box (2), a first condenser (4), a first turbine (5), a gas-liquid separator (6), a compressor (7), a feed pump (11), an evaporator (12), a second turbine (14), a preheater (16) and a second condenser (17). According to the system, recovery of residual heat is coupled with drying of fruits and vegetables together, so that graded utilization of heat energy is realized, and the drying system can be used for drying the fruits and vegetables while outputting mechanical work outwards; low-temperature condensation water (9) separated from condensation and expanding from the drying system can enable condensation pressure in the residual heat recovery system to be reduced, so that the output work of the second turbine (14) is increased. A heat source (13) of the system can be low grade heat, such as sunlight heat, geothermal heat, industrial flue gas waste heat, steam waste heat and the like.

The invention relates to a ternary mixing refrigerant used in an air-conditioner/heat-pumping system, wherein the ternary mixing refrigerant comprises, by mass, 10-40% of 1,1,1,2-tetrafluoroethane, 10-40% of 2,3,3,3-hexafluoropropylene, and 20-50% of propane. According to the present invention, the thermodynamic properties of the refrigerant of the present invention are similar to the thermodynamic properties of R407C, such that the R407C can be replaced through the direct filling of the ternary mixing refrigerant after the original R407C system is slightly changed so as to provide the low replacement cost; and the ternary mixing refrigerant has advantages of environmental protection and good circulation performance compared to the R407C so as to be used as the ideal R407C substitute.

The invention discloses an air conditioner and a high-temperature protecting method and device thereof. The method includes the following steps that a current input voltage of the air conditioner is acquired, and according to the current input voltage, it is recognized that the air conditioner enters a low voltage running state; a current actual rotating speed of an outdoor draught fan in the airconditioner is acquired; and according to the current input voltage and the current actual rotating speed, the running frequency of a compressor in the air conditioner is limited. According to the high-temperature protecting method, according to the current input voltage of the air conditioner and the current actual rotating speed of the outdoor draught fan, the running frequency of the compressoris limited, and therefore when the input voltage is low, the system load is reduced, by lowering the running frequency of the compressor, the condensing pressure is lowered, and reliable running of the system is guaranteed.