109results about How to "Increase evaporating pressure" patented technology

The invention relates to a multi-condenser and double-return-air bypass dehumidification fresh air unit and an air conditioning method. The multi-condenser and double-return-air bypass dehumidification fresh air unit comprises an air feed channel and an exhaust channel. A first heat exchanger and an air feeder are sequentially arranged at the position of the air feed channel. A second heat exchanger and an exhaust fan are sequentially arranged at the position of the exhaust channel. The second heat exchanger is connected with an auxiliary heat exchanger. A first return air bypass valve and a second return air bypass valve are arranged between the air feed channel and the exhaust channel. According to the multi-condenser and double-return-air bypass dehumidification fresh air unit, during refrigerating, the second heat exchanger serves as a condenser, a refrigerant is condensed through the indoor low-temperature exhaust air, the condensation temperature of the unit is reduced, and reheating is conducted through mixing of bypass return air and low-temperature fed air on the air feed side so that cooling capacity losses caused by cold and heat offset can be avoided; in a heating inner circulation mode, an outdoor unit can be started to rapidly increase the indoor environment temperature; and in an outer circulation mode, the second heat exchanger serves as an evaporator, the refrigerant is made to be evaporated through the heat of indoor exhaust air, the evaporation pressure and the heating capacity of the unit are increased, the power consumption of the unit is reduced, and the frosting risk of the unit is avoided.

The invention discloses an MVR continuous evaporation system. The system can be applied to the requirements on different evaporation pressures, and automatic control of continuous and stable feeding and continuous discharging can be realized. The system disclosed by the invention comprises a raw material balance tank, a main body evaporator, a gas-liquid separator, a condensate storage tank, a steam compressor, a vacuum system and at least three heat exchange devices which are connected by virtue of pipelines, control valves and related pumps, wherein the bottom of the raw material balance tank is connected with the inlet of a feeding pump and is connected with an interval inlet of the top end of the main body evaporator by virtue of a heat exchange device; multiple evaporation intervals are contained in the main body evaporator; a gas-liquid collection cavity is formed in the bottom end of the main body evaporator and is connected with the next evaporation interval by virtue of a booster pump; the concentrated solution in the final evaporation interval is used for preheating the raw materials by virtue of the heat exchange devices; the shell pass of the main body evaporator is connected with the condensate storage tank; and steam condensate is connected with the heat exchange devices by virtue of the condensate storage tank, and the raw materials can be preheated.

The invention provides an air conditioning system which independently controls temperature and humidity and a refrigeration /dehumidifying method. A cooling media circulation system, a water circulation system and an air supply system of an air duct machine are assembled to realize independent control of the temperature and the humidity, thus greatly improving comfort of a user and realizing energy saving.

The invention provides an air-conditioner system and a control method of the air-conditioner system. The air-conditioner system comprises a refrigerating system. A first port of a second four-way valve is connected to a pipeline between a first four-way valve and an indoor heat exchanger, and a second port of the second four-way valve is connected to a first position of a pipeline between the indoor heat exchanger and an outer heat exchanger. A first port of a first channel of an auxiliary heat exchanger communicates with a fourth port of the second four-way valve, a second port of the first channel is connected to a second position of the pipeline between the indoor heat exchanger and the outdoor heat exchanger, a first port of a second channel is connected to a third position of the pipeline between the indoor heat exchanger and the outdoor heat exchanger, and a second port of the second channel is connected to a pipeline between the outdoor heat exchanger and an air return port of a compressor. A first throttling component is arranged on a pipeline of the first channel. A second throttling component is arranged on a pipeline between the first port of the second channel and the third position.

The invention discloses a liquid phase-change heat transfer type pumping cooling system which comprises an evaporator system (2), a liquid feeding pump (6), a condenser (5), a pipeline system and a booster pump (3). The evaporator system (2) is arranged in electrical equipment (1); the liquid feeding pump (6) is used for feeding liquid to the evaporator system (2); cooling media can evaporate in the evaporator system (2) to generate steam; the condenser (5) is used for condensing the steam exhausted from the evaporator system so as to generate single-phase liquid; the booster pump (3) is arranged in the pipeline system at an outlet of the evaporator system and is used for reducing the evaporating pressure and increasing the condensing pressure simultaneously. The evaporator system (2) can comprise one evaporator or a plurality of evaporators, each evaporator comprises heat pipes (7) and a heat exchanger (9), the evaporator system is used for dissipating heat by the evaporators to cool the electrical equipment, and the heat is generated in the electrical equipment. The liquid phase-change heat transfer type pumping cooling system has the advantage that the electrical equipment with distributed heat sources can be cooled by the cooling system efficiently.

The invention relates to a method and a device for preparing hydrogen and high-purity carbon monoxide by efficient synthesis gas separation. Continuous rectification is performed by a methane washing tower (C1 tower) with an intermediate heat exchanger and a tower bottom reboiler, a deoxidation-methane tower (C2 tower) with an overhead condenser and a tower pot reboiler and a denitrification tower (C3 tower) with an overhead condenser and a tower pot reboiler to prepare the hydrogen and the high-purity carbon monoxide. According to the method and the device for preparing the hydrogen and the carbon monoxide by efficient synthesis gas separation, the methane washing tower with the reboiler and an intermediate cooler are applied, synthesis gas in which hydrogen content is smaller than 0.5% can be obtained by a single tower pot, hydrogen content of the tower pot is low so that a stripping tower is never required, meanwhile, the hydrogen and the carbon monoxide can be prepared by low energy consumption, 99.9% and over 99.999% of carbon monoxide products can be prepared, and a carbon monoxide compressor is never required when the pressure is larger than 0.2MPa during carbon monoxide preparation so that purposes of saving energy and investments and enhancing operation safety can be achieved.

The invention discloses an air conditioner outdoor unit, an air conditioning unit and a refrigeration control method and a heating control method thereof. The air conditioner outdoor unit comprises an outdoor unit shell and a wind valve, wherein the wind valve covers an intake port of the outdoor unit shell. The air conditioner outdoor unit is provided with the wind valve for covering the intake port of the outdoor unit shell, so that the intake quantity of the outdoor unit shell can be adjusted through the wind valve, that is, the heat exchange quantity of an outdoor heat exchanger with external environment can be adjusted; and in particular, in low-temperature refrigeration and high-temperature heating of the air conditioning unit, the heat exchange quantity of the outdoor heat exchanger with the external environment is reduced, so that the low-temperature refrigeration operation stability and the high-temperature heating operation stability of the air conditioning unit are improved, and the service life of a compressor can be prolonged.

The invention discloses a solar auxiliary heat pump sludge drying system which comprises a drying box, a solar heat collector, a heat pump system, a dehumidifier, an air duct system and a control valve, wherein a low-temperature evaporator of the dehumidifier, an air-energy heat exchanger and a high-temperature evaporator are connected in parallel to constitute the heat pump system. The working process comprises the following steps: sludge enters the drying box through a sludge feed port, is uniformly and flatly laid on a conveyer belt of a sludge conveyer drying device, and slowly moves downwards under the driving action of the conveyer belt, wherein the conveyer belt is composed of a stainless steel screen which is flexibly and air-permeable; dry hot air enters the drying box via the bottom of the drying box, heats the sludge and takes away vapor evaporated in the sludge, and wet air is discharged from the top of the drying box, is subjected to moisture content reduction through an evaporator, a condenser and an electric heater, and returns to the drying box to continue drying the sludge; and the sludge moves downwards in the conveyer belt, and the finally dried finished product is collected at the bottom of the drying box.

The invention discloses a control method of low temperature refrigeration of a rooftop air conditioning unit. The method includes the steps that a first mechanical pressure switch with an off value P1 and an on value P2 is additionally arranged on an exhaust pipe; a second mechanical pressure switch with an off value P3 and an on value P4 is additionally arranged on an air returning pipe; the unit performs refrigeration operation, and two fans operate simultaneously when a exhaust pressure value is larger than or equal to P2; when the exhaust pressure value is equal to or smaller than P1, the first mechanical pressure switch is off, and a first fan stops the service; when an air returning pressure value is equal to or smaller than P3, the second mechanical pressure switch is off, and an indoor fan stops the service; when the air returning pressure value is equal to or larger than P4, the second mechanical pressure switch is on, an alternating current contactor of a second fan pulls in, and the second fan operates alone. According to the control method of the low temperature refrigeration of the rooftop air conditioning unit, refrigerants which are not evaporated completely can be prevented from entering and damaging a compressor during the low temperature refrigeration operation.

The invention discloses a heat pump dryer system. A heating system comprises an air injection enthalpy increasing compressor, a four-way reversing valve, a heating coiler, a thermostatic expansion valve, a refrigerating coiler and a gas-liquid separating device; an economizer system comprises a flash evaporator and a jetting electromagnetic valve; the dehumidification system comprises an electronic expansion valve, a dehumidification electromagnetic valve and a dehumidification coiler; a defrosting system is a singly-arranged defrosting electromagnetic valve; the flash evaporator and the electronic expansion valve are connected between the thermostatic expansion valve and the refrigerating coiler in series, the flash evaporator is arranged on the side close to the thermostatic expansion valve, and the flash evaporator is further connected to the input end of the enthalpy increasing compressor through the jetting electromagnetic valve; the dehumidification electromagnetic valve and the dehumidification coiler are connected to the two ends of the refrigerating coiler in parallel, and the dehumidification electromagnetic valve is arranged on one side close to the electronic expansion valve; and the dehumidification electromagnetic valve is connected to the two ends of the flash evaporator and the electronic expansion valve in parallel. By means of the heat pump dryer system, the compressor efficiency and the internal dehumidification and defrosting effects can be improved, the structure is simple and effective, and the heat pump dryer system is worthy of popularization.

The invention discloses an exhaust air heat recovery fresh air unit equipped with moisture absorption heat exchangers, the unit is provided with two heat exchangers (an evaporator and a condenser) with moisture absorption materials in a refrigeration system, one heat exchanger is to realize the purposes of evaporation cooling and dehumidification, the other one is to realize the functions of condensation heating and regeneration, and the two heat exchanges can be switched over between the evaporation and the condensation for realizing the continuous operation. Compared with the prior art, the exhaust air heat recovery fresh air unit increases the function of regulating the air humidity, the latent heat exhaust air and fresh air condensed water with low temperature and low moisture can be utilized for cooling a refrigerant on the high pressure side of the refrigeration system in summer, thereby decreasing the condensing pressure and providing the energy efficiency ratio of the unit; the exhaust air with high temperature and high moisture can be utilized for heating the refrigerant on the low pressure side of the refrigeration system in winter, thereby improving the evaporation pressure, and further improving the heating capacity; the condensed water in the exhaust air can humidify the fresh air and improve the moisture content in the supplied air; furthermore, the device has simple structure and can save the production cost.

The invention discloses an improved self-cascading refrigeration cycle system and a control method thereof, which are applied to low-temperature systems such as low-temperature freezers, low-temperature refrigerators, medical low-temperature refrigeration instruments, etc. Compared with the traditional self-cascade system, the regenerator and throttle device are added between the condenser and thegas-liquid separator. The system can not only make the two fluids exchange heat more fully in the evaporative condenser, but also prevent the compressor from sucking in the liquid, raise the evaporative pressure of the whole system, reduce the pressure ratio of the compressor, and improve the efficiency of the compressor, so as to increase the refrigeration capacity of the system and improve theperformance of the circulating system. As such, that present invention has significant advantage over conventional self-cascade cycle using regenerator and throttle valves in front of the gas-liquid separator.

The invention relates to a spraying and falling film combined absorption tower and an absorption refrigeration system and an operation method thereof, and belongs to the technical field of waste heat utilization, the spraying and falling film combined absorption tower comprises a tower body, a falling film absorber, at least one group of solution spraying absorbers and at least one group of spraying cooling absorption pipes are arranged in the tower body, and the spraying cooling absorption pipes are partially located in the falling film absorber; outlets of the group of solution injection absorbers are connected with inlets of the group of injection cooling absorption pipes, the solution injection absorbers inject gaseous refrigerants into the injection cooling absorption pipes by utilizing external mixed solution flow, a barren liquor spray head is arranged at the top of the tower body, and barren liquor sprayed by the barren liquor spray head cools the solution injection absorbers and then enters the falling film absorber. According to the invention, the solution jet absorber, including the falling film cooling absorption pipe, and the falling film absorber are installed in the same equipment, so that the absorption rate of the absorption equipment is improved, the equipment structure is optimized, and the cost is reduced.

The invention provides a control method and device for air conditioner frosting delay and an air conditioner, and relates to the technical field of air conditioners. The control method comprises the steps that the outer coil pipe temperature of the air conditioner is continuously sampled; according to the situation of changing of the air conditioner outer coil pipe temperature along with the time, whether the frosting delay condition is met or not is judged; and when the frosting delay condition is met, a heating element is controlled to heat a heat exchanger, and frosting delay operation is conducted. The first-order derivative is solved for the outer coil pipe temperature to judge the changing tendency of the outer coil pipe temperature, the inflection point where a frost layer enters the worsening period is found according to the judgment condition, and the frosting delay operation is started. The heating element is used for eliminating the frost layer and condensate water, the air conditioner frosting time is prolonged, accordingly, the time when the air conditioner enters the automatic defrosting mode is prolonged, and the heating effect and the air conditioner usage comfort are guaranteed.

The invention discloses a photovoltaic photo-thermal energy-storage heat pump system and belongs to the field of solar heat-collection and energy-storage heat pumps. According to the photovoltaic photo-thermal energy-storage heat pump system, a photovoltaic photo-thermal evaporator is combined with an energy-storage heat pump, cold and hot water can be supplied indoors under a refrigeration operation condition by connecting the photovoltaic photo-thermal energy-storage heat pump system with a four-way reversing valve and a plurality of throttle valves, heat and hot water can be supplied indoors under a heating operation condition, and meanwhile, the conversion efficiency of photovoltaic cells is improved by reducing the working temperature of the photovoltaic cells. The photovoltaic photo-thermal energy-storage heat pump system has the advantages of environment protection, energy saving, safety and energy efficiency higher than that of the conventional single system, and improves the photovoltaic conversion efficiency, the photo-thermal conversion efficiency and the energy efficiency of the heat pump system.

The invention discloses a modular solar chemical adsorption heat storage and release and temperature-raising system. The system comprises a heat collecting and energy storage device, a condenser, a liquid storage device, an evaporator, a heat exchange unit and an adsorbate, wherein a heat exchange coiled pipe in a condensation pipe is connected with a low-temperature fluid source when the system collects and stores heat; an evaporator heat exchange coiled pipe in the evaporator is connected with a hot fluid source when the system releases heat; the adsorbate can flow in the heat collecting and energy storage device, the condenser, the liquid storage device, the evaporator and the heat exchange unit which are connected with one another sequentially; and when the system collects and stores heat, a heat storage module which can be controlled and adopts a tube cylinder structure is arranged in the heat collecting and energy storage device, one end of the heat storage module is closed and the other end of the heat storage module is open/closed, a chemical heat storage material is filled between the inner wall and the outer wall of the tube cylinder, a heat-absorbing coating is coated on the outer wall, and a channel is formed in the center of the tube cylinder. The invention also provides a modular solar chemical adsorption heat storage and release and temperature-raising method. According to the system and the method, trans-regional and seasonal heat storage and release can be realized, and high-temperature heat can be provided by increasing evaporation pressure.

Provided is a condensed steam source heat pump driven steam boiler with an economizer. The condensed steam source heat pump driven steam boiler is a trans-boundary product for the condensed steam source heat pump industry and the waste heat steam boiler industry; the economizer can increase the energy efficiency ratio of a condensed steam source heat pump, and an oil cooler is used for recovering sensible heat of exhaust of a compressor; siphon circulation is utilized for driving heat pump working media to extract heat released by a condensed steam source in a back-flow mode, so that rising film evaporation is achieved, and heat pump evaporation pressure is increased; siphon circulation is used for driving softened supplemented water to extract heat released by condensation of the heat pump working media in a back-flow mode, so that rising film evaporation is achieved, and heat pump boiler evaporation pressure is increased; heat is released through condensation in a sectional back-flow mode, so that heat pump condensation pressure is lowered; and the differential pressure, displacement, investment and electricity consumption of the compressor are lowered.

The invention provides an evaporator of a turbine refrigerator and a turbine refrigerator having the evaporator at a low cost, and the evaporator can improve heat conductivity. The evaporator has a heat conduction tube (35) in which a cooled fluid flows, and a gas-liquid separator (41) which is configured in a tank body (31) and separates refrigerant gas from refrigerant liquid. The gas-liquid separator (41) has a flow path unit (42) in which a gas-liquid refrigerant flow path (45) is formed, and a refrigerant gas guiding component (50) connected with the flow path unit (42). A refrigerant gas flow path (51) communicated with the gas-liquid refrigerant flow path (45) is formed inside the refrigerant gas guiding component (50), and extends upwards along an inner surface of the tank body (31).