679results about "Subcoolers" patented technology

The invention provides a magnetic suspension centrifugal water chilling unit, and belongs to the field of refrigeration equipment. The magnetic suspension centrifugal water chilling unit comprises a magnetic suspension compressor, a condenser and an evaporator, the magnetic suspension compressor is connected with the condenser through an exhaust pipeline, and the condenser is connected with the magnetic suspension compressor and the evaporator through a liquid supply pipeline assembly; the system further comprises a natural process control module, the natural process control module is used for dynamically adjusting the starting sequence of a plurality of magnetic suspension compressors in the water chilling unit by determining the energy efficiency health index of the water chilling unit and calculating the energy efficiency health index, and the natural process control module is electrically connected with the central controller. And a natural process control module is arranged, a multi-dimensional energy efficiency health index model is constructed, and the starting sequence of the compressors is dynamically adjusted by integrating the actual energy efficiency ratio, the evaporation efficiency, the compressor aging coefficient, the pressure fluctuation and the environment humidity correction term.

The utility model discloses an anti-cavitation device and a fluorine pump air conditioning system.The anti-cavitation device is used for the fluorine pump air conditioning system and comprises a bypass pipeline, and one end of the bypass pipeline is connected with an outlet of a fluorine pump of the fluorine pump air conditioning system; and the other end of the connecting pipe is connected to a reflux inlet of a liquid storage tank of the fluorine pump air-conditioning system or connected to a liquid storage tank inlet pipe of the liquid storage tank. According to the anti-cavitation device and the fluorine pump air-conditioning system, the bypass pipeline is arranged between the fluorine pump outlet of the fluorine pump air-conditioning system and the liquid storage tank, and the refrigerant flows back into the liquid storage tank from the fluorine pump outlet by utilizing the high pressure of the fluorine pump outlet, so that the refrigerant in the liquid storage tank is not gasified due to the fact that the pressure in the liquid storage tank is not easy to drop quickly; therefore, the cavitation phenomenon of the fluorine pump can be reduced, the cutoff resistance and the cavitation resistance of a fluorine pump refrigerating circuit are greatly improved, the operation efficiency of the fluorine pump is improved, and the service life of the fluorine pump is long.

The utility model discloses an air-cooled heat pump evaporation spraying system controlled by supercooling degree, which comprises a refrigerating system and a spraying system, and an atomizing nozzle of the spraying system is aligned with a condenser of the refrigerating system. The spraying system comprises a water storage tank, an electronic water treatment instrument, a constant pressure pump, a countercurrent heat exchanger A, a countercurrent heat exchanger B and an atomizing nozzle which are sequentially connected with a water outlet of the water storage tank through a pipeline, an outdoor environment temperature sensor, and an exhaust temperature sensor mounted on an exhaust port pipeline of the compressor; the upstream temperature sensor and the pressure sensor are installed on a pipeline in front of the electronic expansion valve, and the constant pressure pump, the environment temperature sensor, the exhaust temperature sensor, the upstream temperature sensor and the pressure sensor are electrically connected with the controller and are monitored and controlled by the controller. By means of the mode, whether spraying is needed or not is determined according to the degree of supercooling, and the condensation area and the evaporation area of a refrigerating system are increased.

The utility model relates to a liquid air production device which comprises a raw material air compression system, an air cooling and drying system, a circulating pressurization system, an expansion refrigeration system, a heat exchange cold box and a liquid air storage tank. The raw material air compression system comprises a gas feeding air compressor and an air cooler; the air cooling and drying system comprises a freezing dryer and an adsorption dryer; and the circulating supercharging system comprises a circulating supercharger and a supercharging cooler. According to the production method, efficient production of liquid air is achieved through the steps of multi-stage compression, cooling, drying, pressurization, expansion refrigeration and the like. By optimizing energy utilization, low-temperature air cooling capacity is recycled, compression work and power consumption are saved, and the production cost is remarkably reduced. The device is suitable for the fields of energy storage, metal smelting, precision manufacturing and the like.

A refrigeration apparatus includes: a first injection flow passage branching off from a main circuit to allow a refrigerant to pass through a subcooler and be injected into a region of a compressor that is midway through a compression process; a first injection regulating valve disposed upstream of the subcooler in the first injection flow passage; a first valve control unit configured to control the first injection regulating valve such that a degree of superheat of the refrigerant injected through the first injection flow passage reaches a target degree of superheat; a reception unit configured to receive a refrigeration request degree; and a target superheat degree control unit configured to set the target degree of superheat to a first value when the refrigeration request degree received by the reception unit is a first refrigeration request degree and set the target degree of superheat to a second value higher than the first value when the received refrigeration request degree is a second refrigeration request degree lower than the first refrigeration request degree.

The invention relates to a refrigeration system (10) for a motor vehicle (100) that is at least partially driven electrically or by an internal combustion engine, comprising a refrigerant compressor (12); a heat exchanger module (14) with a first heat exchanger surface (16), a second heat exchanger surface (18), in particular a subcooling section, and a refrigerant reservoir (20) connected to the two heat exchanger surfaces (16, 18); a first heat exchanger (22), in particular an evaporator, for conditioning interior air; a second heat exchanger (24; 28), wherein the refrigeration system (10) is configured to be operated in a cooling mode and at least one heat pump mode, including the heat exchanger module (14) and / or the second heat exchanger (24).It is provided that the refrigerant reservoir (20) assigned to the heat exchanger module (14) is fluidically integrated into the refrigeration system (10) in such a way that it can be used as a high-pressure side refrigerant reservoir (20) and / or as a low-pressure side refrigerant reservoir (20). Furthermore, a motor vehicle (100) with such a refrigeration system is described.

A method for controlling a three-way valve that diverts return refrigerant from a first compressor to a second compressor or a third compressor, the second and third compressor in parallel includes obtaining a temperature of the return refrigerant indicating a degree of superheat of the return refrigerant. The method also includes determining if the three-way valve should be transitioned into a first position, transitioned into a second position, or maintained in a current one of the first position or the second position. The method also includes transitioning the three-way valve into the first position or the second position, or maintaining the three-way valve in the first position or the second position. In the first position, the first compressor provides the return refrigerant to the second compressor through the three-way valve and in the second position, the first compressor provides the return refrigerant to the third compressor through the three-way valve.

A heating, ventilation, air conditioning, and refrigeration (HVAC&R) system includes a working fluid circuit configured to circulate a working fluid therethrough, an evaporator disposed along the working fluid circuit, where the evaporator is configured to place the working fluid in a heat exchange relationship with a conditioning fluid, and a vessel disposed along the working fluid circuit, where the vessel includes an accumulator section and a subcooling section. The working fluid circuit is configured to direct a first flow of the working fluid from the evaporator to the accumulator section of the vessel, the accumulator section is configured to separate the first flow of working fluid into a vapor working fluid and a liquid working fluid, the vessel is configured to direct the liquid working fluid from the accumulator section to the subcooling section, and the subcooling section of the vessel is configured to place the liquid working fluid in a heat exchange relationship with a second flow of working fluid received via the working fluid circuit.

A refrigeration cycle device includes a refrigerant circuit and a control device to control an expansion valve. The control device includes a supercooling level controller, a discharge temperature controller and a first maximum selector. The supercooling level controller calculates a first opening degree of the expansion valve such that a supercooling level of the refrigerant follows a target value and to output a calculation result. The discharge temperature controller calculates a second opening degree of the expansion valve such that temperature of a refrigerant discharged from a compressor follows a predetermined upper limit and to output a calculation result. The first maximum selector outputs a maximum value out of the output of the supercooling level controller and the output of the discharge temperature controller. The control device controls the expansion valve by using the value outputted from the first maximum selector.

Cooling module (22) for an electric or hybrid motor vehicle (10), through which cooling module (22) an air flow (F) is intended to pass, comprising: —a set of heat exchangers (23) comprising: —a first heat exchanger (24) configured to be a condenser connected within an air conditioning circuit (A), and —a second heat exchanger (26) configured to be a low-temperature radiator connected within a thermal management circuit (B), —a tangential-flow turbomachine (30) configured so as to generate the air flow (F), the set of heat exchangers (23) further comprising a third heat exchanger (28) configured to be a sub-cooler connected within the air conditioning circuit (A), the third heat exchanger (28) being arranged within the set of heat exchangers (23) furthest upstream in the direction of the air flow (F).

The utility model discloses an outdoor unit of a high-capacity multi-split air conditioning system, which belongs to the technical field of air conditioners and is provided with four electromagnetic valve structures, specifically, one end of a third electromagnetic valve is connected among a four-way valve, a first one-way valve and a second one-way valve, and the other end of the third electromagnetic valve is connected to a first gas-liquid separator and a second gas-liquid separator; one end of the first electromagnetic valve is connected to the first outdoor heat exchange assembly, the other end is connected to the third electromagnetic valve, one end of the second electromagnetic valve is connected to the second outdoor heat exchange assembly, the other end is connected to the third electromagnetic valve, one end of the fourth electromagnetic valve is connected to the supercooling assembly, and the other end is connected to the first gas-liquid separator and the second gas-liquid separator. The four-way valve is not reversed during heating and defrosting, a large-displacement compressor and a large-volume gas-liquid separator can be selected, and the operation modes of the system are variable according to load changes.

The utility model discloses a plate heat exchanger, a vehicle heat management device, a vehicle heat management system and a vehicle, the plate heat exchanger is provided with a first refrigerant flow channel and a plurality of first flow channels which are mutually independent, and the plurality of first flow channels comprise a second refrigerant flow channel and a first water cooling flow channel; the first refrigerant flow channel is used for receiving the refrigerant flowing out of the second refrigerant flow channel. According to the technical scheme, the space occupied by the thermal management device for the vehicle is reduced.

The invention relates to the technical field of compression refrigeration, in particular to an air conditioner heat pump system and an air conditioner. The air conditioner heat pump system comprises a heat regenerator and a throttling component. The heat regenerator is provided with a first heat regeneration pipe and a second heat regeneration pipe; the throttling component is arranged on a refrigerant channel between the condenser and the evaporator and communicates with the first heat return pipe and the second heat return pipe. And under the refrigerating working condition and the heating working condition, the refrigerant before throttling enters the first heat return pipe, and the refrigerant after throttling enters the second heat return pipe, so that the refrigerant in the first heat return pipe exchanges heat with the refrigerant in the second heat return pipe. According to the heat exchanger, through the throttling component, a refrigerant before throttling can enter the first heat return pipe, the refrigerant after throttling can enter the second heat return pipe, and the refrigerant in the first heat return pipe exchanges heat with the refrigerant in the second heat return pipe, so that the refrigerant in the first heat return pipe is reduced, and the supercooling degree of the refrigerant is improved; the problem that in the prior art, an air conditioner heat pump system cannot improve the supercooling degree of a refrigerant under the heating working condition is solved.

The invention discloses an energy-saving temperature and humidity decoupling control cold and hot dual-function air conditioning system and a control method thereof, and belongs to the technical field of air conditioning, the system comprises a precise air conditioning system, an air handling unit and a control unit, the control unit is connected with the precise air conditioning system and the air handling unit, and the precise air conditioning system is connected with the air handling unit. The control method comprises the following steps that S1, the air conditioning system switches operation modes; s2, adjusting parallel air ducts of the air conditioning system through the air valve matrix; s3, the decoupling economizer carries out decoupling control; s4, any one of five working conditions of pure refrigeration regulation, low-temperature and constant-humidity regulation, medium-temperature and constant-humidity regulation, high-temperature and constant-humidity regulation and pure heat supply regulation is operated; and S5, the air handling unit is controlled to execute air volume adjustment, air filtration, surface cooling and reheating. The system can meet various complex air treatment requirements of a user, and has a wide temperature and humidity application range and precise temperature and humidity regulation and control precision.

A refrigeration system (10) for a motor vehicle that is at least partially electrically powered is described, comprising a refrigerant compressor (12), a first heat exchanger (18) having a condensation section (18kv) and a subcooling section (18sc), a second heat exchanger (22) designed as an evaporator, a third heat exchanger (26), in particular a heating coil, wherein the first heat exchanger (18) has a first refrigerant connection (K1) connected to the condenser (18kv) and a refrigerant outlet (K3) connected to the subcooling section (18sc).The first heat exchanger (18) is provided to have a second refrigerant connection (K2) connected to the condensing section (18kv), with a refrigerant flow in an associated circuit of the refrigeration system (10) directly between the first refrigerant connection (K1) and the second refrigerant connection (K2), bypassing the subcooling section (18sc), such that the first heat exchanger (18) has a heat pump function, and the condensing section (18kv) serves to evaporate the refrigerant. Furthermore, a motor vehicle with such a refrigeration system (10) is described.

The invention discloses heating and ventilation equipment. The heating and ventilation equipment comprises an outdoor unit and an indoor unit. The outdoor unit comprises a liquid pipeline and a gas pipeline; the indoor unit comprises an indoor unit, a load liquid pipe and a load gas pipe, the load liquid pipe communicates with the indoor unit and the liquid pipeline, and the load gas pipe communicates with the indoor unit and the gas pipeline; wherein at least parts of the liquid pipeline, the gas pipeline, the load liquid pipe and the load gas pipe are steel pipes. According to the technical scheme, the cost of the heating and ventilation equipment can be reduced.

The invention relates to a heat pump device that makes it possible to utilize waste heat from technical processes or from the environment to simultaneously generate useful steam (12) and useful heat. The heat pump device comprises a heat pump module (1), a low-pressure steam generator (2) for generating low-pressure steam (11), a steam jet compressor (3) for generating useful steam (12) from high-pressure steam (10) and the low-pressure steam (11), and a first heat exchanger (4) for providing the useful heat. The heat pump device is suitable for applications where there is a simultaneous demand for both steam and heat.

Lyophilization plant configured to remove a substance from a product to be lyophilized, comprising a lyophilization tank and a closed-loop refrigeration system, coupled to the lyophilization tank and operated by a carrier fluid. The refrigeration system includes a carrier fluid expansion unit, a first heat exchanger, a carrier fluid compression unit, and a main flow regulating member of the carrier fluid. The main flow regulating member has an inlet opening in fluid communication with the compression unit, a first discharge opening connected to a first branch and a second discharge opening connected to a second branch, parallel to the first branch. The main flow regulating member is configured to regulate and determine respective amounts of carrier fluid conveyed in the first branch and in the second branch so as to obtain a plurality of operating configurations of the lyophilization plant.

A water heater and a method for controlling the same are provided. The water heater may include a compressor and a condenser disposed on an outlet side of the compressor and configured to perform heat exchange with water and may constitute a branch passage by branching an outlet-side passage of the condenser, and a cooling unit of an electronic component unit may be constituted in the branch passage. The temperature of the refrigerant introduced into the cooling unit may be lowered by installing a cooling expansion device on an inlet side of the cooling unit of the electronic component unit. With this configuration, the cooling of the electronic component unit by the cooling unit may be performed efficiently.

A multi-temperature air conditioning system, a control method thereof and a transport refrigeration vehicle. The multi-temperature air conditioning system includes an outdoor unit; a first indoor unit; and a second indoor unit; a number of a first four-way valves corresponds to the number of the first indoor units, and a number of a second four-way valves corresponds to the number of the second indoor units; and a section flow path which could be connected or disconnected is further included, which connects the first indoor unit between the first throttling element and the first on-off valve, and connects the second indoor unit between the second throttling element and the second on-off valve.

A sub-cooler for a sub-cooling cryogenic refueling system is disclosed herein. The sub-cooler includes a first valve to separate flowing cryogenic fuel into a primary flowline and an auxiliary flowline, a second valve to reduce the saturated pressure and temperature of the cryogenic fuel in the auxiliary flowline, a cryogenic heat exchanger to transfer heat from the primary flowline to the auxiliary flowline, a temperature sensor to measure the temperature of the sub-cooled cryogenic fuel in the primary flowline, and a sub-cooler controller to control the effective areas of the primary flowline inlet and the auxiliary flowline inlet at the first valve.

The embodiment of the present application provides a heat energy conversion device, which includes: a base, a first module, a second module and an electric control module, the top of the base has a first area, a second area and a third area; the first module is arranged in the first area of ​​the base, the first module includes a compressor, a condenser and a heat exchanger, the hot side inlet and the hot side outlet of the heat exchanger are connected with the lubricating medium inlet and the lubricating medium outlet of the compressor to form a lubricating medium circulation loop; the second module is arranged in the second area of ​​the base, the second module includes a first throttling element and an evaporator, the compressor, the condenser, the first throttling element and the evaporator are connected through a refrigerant pipeline to form a refrigerant circulation loop; the electric control module is arranged in the third area of ​​the base, and the electric control module is at least electrically connected to the compressor and the first throttling element. In this way, it is conducive to improving the modularization level and the convenience of production and maintenance of the heat energy conversion device, and is conducive to miniaturization and machine series.

The utility model provides a stand-alone system air suspension frequency conversion centrifugal water chilling unit which comprises a circulation main loop formed by connecting an evaporator, an air suspension centrifugal compressor, a condenser and an economizer through refrigerant pipelines so as to form a refrigeration circulation loop; wherein throttling pipelines are respectively arranged on a refrigerant pipeline between the condenser and the economizer and a refrigerant pipeline between the economizer and the evaporator, so that secondary throttling is carried out on a liquid refrigerant in the refrigerant pipelines; one end of the air supply pipeline is communicated with the economizer, and the other end of the air supply pipeline is communicated with the air suspension centrifugal compressor; the variable-frequency cooling pipeline comprises a frequency converter, one end of the frequency converter is communicated with the condenser through a frequency converter cooling liquid inlet pipeline, and the other end of the frequency converter is communicated with the evaporator through a frequency converter cooling air return pipeline. The unit provided by the utility model can effectively improve the refrigeration efficiency and performance, and reduce the energy consumption and operation cost, thereby realizing the efficient, energy-saving and environment-friendly refrigeration effect.

The present application discloses a condenser, comprising a housing, at least one liquid guide plate layer, a condenser tube bundle, a supercooling channel, and a supercooling tube bundle. The liquid guide plate layer is configured to guide refrigerant liquid obtained by condensation of the condenser tube bundle on the upper part of the liquid guide plate layer into the supercooling channel, so as to exchange, in the supercooling channel, heat with a cooling medium in the supercooling tube bundle. According to the condenser of the present application, the supercooling channel is directly provided in the condenser, and at least some of the supercooling tube bundles are directly provided in the supercooling channel, so that the number of the supercooling tube bundles at the bottom of the housing is reduced, thereby lowering the liquid refrigerant height required for immersing the supercooling tube bundles at the bottom of the housing, and thus reducing the refrigerant charge required for the condenser.

A compressor unit includes a first case, a first compressor, a cascade heat exchanger, a second compressor, a first connecting port, and a second connecting port. The first compressor, the cascade heat exchanger, and a heat source heat exchanger accommodated in a second case constitute a first refrigerant cycle. The second compressor, the cascade heat exchanger, and a utilization heat exchanger accommodated in a third case constitute a second refrigerant cycle. The first connecting port is connected to the heat source heat exchanger via a first connection piping. The second connecting port is connected to the utilization heat exchanger via a second connection piping.

The present invention improves the efficiency of liquefying a material gas. This liquefaction device comprises: a material pipe through which a material gas flows; a magnetic body which is connected to the material pipe and is capable of adsorbing the material gas supplied from the material pipe, the temperature of the magnetic body decreasing when application of a magnetic field is stopped; and a magnet which applies the magnetic field to the magnetic body. The magnet stops applying the magnetic field to the magnetic body in a state in which the magnetic body has adsorbed the material gas, whereby the magnetic body cools the adsorbed material gas.

A heat pump system having a common refrigerant flow path split coupled to heating mode first and second refrigerant streams. In the common refrigerant flow path, a compressor is coupled to receive refrigerant from the heating mode first refrigerant stream and the heating mode second refrigerant stream. A refrigerant-to-refrigerant heat exchanger couples heat between the heating mode first refrigerant stream and the heating mode second refrigerant stream. A first refrigerant-air heat exchanger and a second refrigerant-air heat exchanger in a second air flow conduit is coupled to receive a first air flow from a first refrigerant-air heat exchanger in a first air flow conduit.

To further save energy in addition to energy saving by using a supercooling heat exchanger.SOLUTION: A refrigeration device 10 includes: a main refrigeration circuit 15 filled with a first refrigerant; a supercooling refrigeration circuit 16 filled with a second refrigerant and connected to a supercooling heat exchanger 14; and a controller 100. The supercooling heat exchanger 14 supercools the first refrigerant in the main refrigeration circuit 15. In superheating degree setting control, the controller 100 sets a target value of a superheating degree of the second refrigerant on an outlet side of the supercooling heat exchanger 14 to a first value when a refrigeration request level is a first request value, and sets the target value of the superheating degree to a second value larger than the first value when the refrigeration request level is a second request value lower than the first request value. In the superheating degree setting control, the controller 100 controls a second expansion mechanism 13 on the basis of the target value of the superheating degree.SELECTED DRAWING: Figure 1

The present invention discloses a low-pressure refrigerant liquid supply system and a control method thereof, which belongs to the technical field of steam compression cycle chilled water (heat pump) units, including a chilled water unit system and a bearing liquid supply system. The chilled water unit system includes a refrigerant pump, an evaporator, a condenser, a compressor, a power saver, a throttling mechanism, and a PLC control box. The bearing liquid supply system includes a first bearing lubrication liquid supply path from the condenser liquid collection bag to the compressor bearing and a second bearing lubrication liquid supply path from the condenser liquid collection bag to the compressor bearing. Through the design of the bearing liquid supply system, the influence of the vaporization of the refrigerant on the liquid supply of the refrigerant pump can be avoided as much as possible, the along-the-line / local resistance loss of the pipeline can be reduced, the cavitation margin before the refrigerant pump and the supercooling of the refrigerant can be guaranteed, the low-frequency operation of the refrigerant pump, the insulation of the bearing liquid supply pipeline and the exhaust of the pipeline after the refrigerant pump can effectively solve the adverse effects of pipeline vaporization on the liquid supply.

Provided are a heat exchange component (1) and a heating and cooling control device (1000). The heat exchange component comprises a heat exchanger (11) and an external assembly, wherein a first flow channel (111) and a second flow channel (112), which are independent of each other, are provided in the heat exchanger (11); and the external assembly is mounted on the heat exchanger (11), and comprises a communication device (13) and a throttling device (12). The communication device (13) comprises a first connection port (1321), a second connection port (1322) and a third connection port (1323), every two of which are in communication with each another, wherein the first connection port (1321) is in communication with the first flow channel (111), and the second connection port (1322) is in communication with the second flow channel (112) by means of the throttling device (12).