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

The invention provides a low-condensing-pressure deep supercooling efficient dehumidifier. The low-condensing-pressure deep supercooling efficient dehumidifier comprises an air flue, a first draught fan and a refrigerating and dehumidifying system. The refrigerating and dehumidifying system comprises an evaporator, a first condenser, a second condenser, a compressor and a throttling device. According to the low-condensing-pressure deep supercooling efficient dehumidifier, a bypass airflow channel is additionally arranged in the air flue between the first condenser and the second condenser, so that the ventilation quantity of the first condenser is increased, and the condensing pressure of refrigerating fluid gas in the condensers is reduced; the first condenser is used for heat release and cooling of a sensible heat portion of the overheated refrigerating fluid gas and heat release, condensation and liquefaction of the refrigerating fluid gas, and the second condenser is used for cooling and supercooling of refrigerating fluid; since a finned thermal bridge between the first condenser and the second condenser is disconnected, the supercooling degree of the refrigerating fluid at the tail end of the second condenser is improved, the vaporization ratio of the refrigerating fluid in the throttling device can be lowered, the evaporation and heat absorption capacity of the refrigerating fluid in the evaporator is improved, and the energy efficiency ratio of the dehumidifier is increased substantially.

The present invention makes it possible to integrate and control in one circuit the systems, such as electric power components, a driving motor, a stack, and an AC condenser which have the maximum enthalpy under similar operational temperature and use conditions, by using an integrated radiator. Therefore, it is possible to minimize air-through resistance of the radiator for cooling the stack and the electric power components and ensure smooth and stable cooling performance of the stack, electric power components, and AC condenser while improving fuel efficiency by reducing the condensation pressure of the air conditioner. Further, it is possible to improve cooling efficiency by non-repeatedly arranging heat exchangers, and reduce the weight of a vehicle, volume of the parts, and the manufacturing cost, by avoiding using too many parts, such as a radiator, a water pump, and a reservoir tank.

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.

A clothes treating apparatus having a heat pump cycle for performing a washing cycle and a drying cycle is provided. The clothes treating apparatus may include a drum configured to accommodate a item to be treated; a heat pump cycle having a first evaporator, a compressor, a condenser, and an expansion valve to heat air introduced into the drum; a circulation duct configured to form a circulation passage of air that has passed through the drum; a circulation fan configured to circulate the air; and a controller configured to drive the heat pump cycle and the circulation fan during the washing cycle to preheat at least one of the drum or the circulation duct.

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 discloses an efficient fresh air dehumidifier based on heat recovery and double-evaporation temperature of a heat pump. The efficient fresh air dehumidifier comprises two parts including an inner machine and an outer machine. Compared with outdoor air, the temperature and humidity of exhaust air in an air conditioning room are low, and the exhaust air in the air conditioning room is a cold source with a certain grade. According to the efficient fresh air dehumidifier, a heat recovery mode of the heat pump is adopted, the indoor exhaust air passes through a heat recovery exchanger under the action of an exhaust fan, so that refrigerant is condensed by the exhaust air, and then the refrigerating capacity in the exhaust air is transferred to an evaporator so as to cool fresh air by virtue of a refrigerating cycle, so that the effect of recovering energy is achieved. On the other hand, the heat recovery exchanger is used, so that the heat exchange on the condensing side of a refrigerating system is improved, and the condensing pressure of the whole system is reduced. Under the synthetic action of the heat recovery exchanger and the refrigerating system, the energy efficiency ratio of the fresh air dehumidifier can be effectively increased.

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 present invention is an energy-storage circulating cooling technology for a water-cooled condenser in a cold storage. An ice accumulator is installed in the circulating water pool of the refrigeration system. One or more sets of ice storage pipes are connected to the input end of the compression condensing unit in the cold storage refrigeration system through the ammonia liquid separator, and form an independent cold storage system with the cooling tower. The advantages of the present invention: the ice storage device is installed in the circulating water pool to reduce the cooling water temperature in summer by 10°C on average, reaching 25°C; the condensation pressure is reduced by 0.2mpα on average, reaching 1.0mpα, the comprehensive energy consumption is reduced by 15-30%, and the efficiency ratio is COP The value is increased by about 30%. It uses the national peak and valley electricity price policy to store the circulating cooling water of the condenser during the low-valley electricity price period, and convert energy during the peak electricity period, thereby reducing the condensation pressure, increasing the efficiency ratio COP value, and achieving the safe use of the refrigeration system in high-temperature seasons , and reduce power consumption by 15-30%.

The invention provides an ultra-efficient direct expansion heat recovery type dehumidification fresh air machine which comprises an air supply channel of outdoor air, an exhaust channel of indoor air, and an outdoor unit. The air supply channel is provided with a first heat exchanger, a third heat exchanger and a reheating condenser which have the condensation and evaporation functions. The exhaust channel is provided with a second heat exchanger which has the condensation and evaporation functions. The second heat exchanger and the third heat exchangerare further connected with a fourth heat exchanger. In the refrigerating process, a high-temperature refrigerant is condensed through indoor low-temperature exhausted air, the condensation temperature of the fresh air machine is reduced, and the sensible heat energy of the indoor exhausted air is utilized. In the heating process, indoor high-temperature exhausted air serves as a heat source, the evaporation temperature of the fresh air machine is increased, due to the facts that the dew point temperature of the indoor exhausted air is high, and the evaporation temperature is lower than the dew point temperature of the exhausted air, so that condensed water is separated out of the surface of the second heat exchanger, and at the moment, both the sensible heat energy of the indoor exhausted air and the latent heat energy of the indoor exhausted air are recycled.

The invention discloses a novel heating station system having both large-temperature-difference heat exchange and concentrated heat refrigeration functions, and relates to the technical field of heating devices. The novel heating station system comprises an absorption heat pump, a compression heat pump, a cooling tower, a first heat exchanger and a heat exchanger; the absorption heat pump includes a generator, a first evaporator, an absorber and a first condenser; the compression heat pump includes a second evaporator and a second condenser; under the working conditions in winter, the large-temperature-difference heat exchange is realized through the absorption heat pump and the compression heat pump, the heating network water return temperature is lowered, and the heating network conveying capacity is improved; under the working conditions in summer, high-temperature heating network water supplied by a concentrated heating resource is used for driving the absorption heat pump to realize concentrated heat refrigeration; meanwhile, the compression heat pump is converted to a refrigeration working condition; the absorber and the first condenser are connected with the second condenser in series for heating; the cooling tower is matched for cooling; and the first evaporator and the second evaporator are serially connected for cooling to realize frozen water supply of a cold supply terminal, so that the utilization rate of heat pump / refrigerator equipment is increased.

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 relates to an energy-saving electric heating humidification system for an air conditioner and a control method thereof. The electric heating humidification system comprises a compressor, an electric heating humidifier, a condenser and a heat retriever, wherein an exhaust outlet of the compressor is connected with two branches, one branch is communicated with one end of the condenser, and the other branch is communicated with the heat retriever; a refrigerant inlet, a refrigerant outlet, a water inlet and a water outlet are respectively arranged on the heat retriever, the refrigerant inlet is communicated with the exhaust outlet of the compressor, the refrigerant outlet is communicated with one end of the condenser, the water inlet is communicated with a water supply pipe which supplies water for the electric heating humidifier, and the water outlet is communicated with a water inlet pipe of the electric heating humidifier. A first solenoid valve and a second solenoid valve are arranged between the two branches, the first solenoid valve and the second solenoid valve are respectively and electrically connected with a main controller of the air conditioner, and the first solenoid valve is serially connected between the exhaust outlet of the compressor and the refrigerant outlet of the heat retriever. The invention has the characteristics of low manufacture cost, flexible operation and low power consumption.

The invention relates to an air-cooled heat pump water cooler set, in which is disposed a water sprayer made up of a magnetic valve, a water filter, a water atomizer and a spray-transfer device connected in order. The spray-transfer device is used as the outlet of the system and the magnetic valve is used as the inlet of the system. Outside the casing is disposed a moisture-temperature sensor connected with a electric control system. The inventive water sprayer can act for reducing the air intake temperature on the condenser side can be reduced by the spray evaporation to increase heat-exchange temperature difference between the condenser and the air, so as to improve the heat-exchange environment and effect of the condenser side.

The invention provides a direct-evaporating type ice cold accumulation refrigerating system and a refrigerating method thereof, relating to the technical field of refrigerating air conditioners. The refrigerating system comprises a refrigerating unit, an end device, an ice making unit, a heat exchanging device and an ice accumulation tank, wherein an evaporator of the ice making unit is arranged in the ice accumulation tank, the ice accumulation tank is connected with a clod fluid channel of the heat exchanging device, a hot fluid channel of the heat exchanging device is connected with the end device, a pipeline is arranged on a loop between a condenser of the ice making unit and the evaporator of the refrigerating unit and a corresponding circulating pump and control valve are arranged on the pipeline. Cooling water of the condenser of the ice making unit is supplied after being precooled to 2-20 DEG C by the refrigerating unit. The problem that the conventional refrigerating unit cannot work on an ice making operation condition and the problem that an air-cooling ice maker has a large compression ratio, is high in cost and is complicated to control can be overcome, the cost of a refrigerating system can be reduced and ice making efficiency and operational stability can be improved.

The invention discloses a frostless air source heat pump system based on humidity adjustment and evaporative cooling. The frostless air source heat pump system based on humidity adjustment and evaporative cooling comprises a refrigerant circuit, a water and humidity adjustment solution circuit and an air circuit. The refrigerant circuit comprises a compressor, a four-way valve, a first heat exchanger, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, a heat exchanger, a liquid accumulator, a drying and filtering device, an electronic expansion valve, a finned tube exchanger and an air-liquid separator; the water and humidity adjustment solution circuit comprises a humidity adjustment device, a first valve, a second valve, a third valve, a fourth valve, a first solution pump, a second solution pump, a fluid reservoir, a heat exchanger and a regenerating device; and the air circuit comprises the finned tube exchanger , the humidity adjustment device and a fan. When the system provided by the invention runs at a heating mode in winter, the frosting can be avoided, when the system runs at a cooling mode in summer, the condensing temperature can be lower through evaporative cooling, and higher cooling efficiency is achieved, so that dual efficient running of the system in winter and summer is realized.

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.