449results 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 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 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 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.

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.

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

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).

The invention discloses an energy-saving air conditioner with a waste heat recovery mechanism, relates to the technical field of air conditioning equipment, and aims at the operation process of heating and ventilation of an air conditioner, a water circulation heat exchange process is additionally added, and the water circulation heat exchange process is essentially based on media such as heat conduction liquid. High-temperature and high-pressure gas is subjected to secondary heat exchange with the heat conduction liquid through the spiral flow channel after being subjected to the heat exchange process of the heating and ventilation pipe, residual heat in the high-temperature and high-pressure gas is transferred into media such as the heat conduction liquid, and after the temperature in the heat conduction liquid rises to a numerical value meeting the requirement, the heat conduction liquid is subjected to synchronous movement through the two piston blocks; media such as heat conduction liquid which accumulates enough heat are supplemented into a heat exchange groove plate, the flowing mode of the media such as the heat conduction liquid is further limited, and the purpose is that heat left in the heat exchange process is supplemented into a heating and ventilation pipe assembly again, and the waste heat recovery purpose is achieved in a water circulation mode.

The present disclosure provides a multi-split air conditioning system and a control method thereof, comprising a compressor, an outdoor heat exchanger, a first gas side pipe, a second gas side pipe and a liquid side pipe, the first gas side pipe, the second gas side pipe and the liquid side pipe are all communicated between the indoor side and the outdoor side, and the first gas side pipe is communicated with the exhaust end of the compressor; further comprising at least one indoor unit, at least one heat storage module, at least one constant temperature dehumidification indoor unit, at least one hot water module, at least one floor heating module, and a photovoltaic module capable of absorbing solar energy and generating electric energy for supply to the multi-split air conditioning system. According to the present disclosure, the effects of constant temperature dehumidification, heat storage defrosting, air conditioning demand, floor heating demand, domestic hot water demand and photovoltaic application can be realized simultaneously through a set of system, the actual needs of users are solved, and each module can be selected to be connected to the system or not according to actual needs.

The invention relates to the technical field of refrigerating systems, and discloses a single-machine double-system type hot fluorine defrosting refrigerating system which comprises a main machine refrigerating system, an auxiliary machine refrigerating system and two gas-liquid separators, the main machine refrigerating system comprises a first-stage compressor, a first-stage condenser, a first-stage expansion valve and a first-stage evaporator, and the auxiliary machine refrigerating system comprises a second-stage compressor, a second-stage condenser, a second-stage expansion valve and a second-stage evaporator; the auxiliary machine refrigeration system comprises a second-stage compressor, a second-stage condenser, a second-stage expansion valve, a second-stage evaporator, a third-stage condenser, a third-stage expansion valve and a third-stage evaporator. According to the technical scheme, the double refrigeration circulation paths are introduced into the refrigeration system, during refrigeration, the main machine refrigeration system is responsible for refrigeration, the auxiliary machine refrigeration system supplies liquid to the main machine refrigeration system for undercooling, the heat load is relieved, and the unit refrigeration capacity is improved; in the defrosting process, the auxiliary machine refrigeration system is adopted for generating high-temperature and high-pressure hot fluorine for defrosting, the energy consumption of hot defrosting is reduced, fire hazards caused by aging of electric heating elements are avoided, and the safety coefficient of system operation is improved.

The utility model discloses a supercooling integrated gas-liquid separator which belongs to the technical field of air conditioners and comprises a tank body, an air inlet pipe and an air outlet pipe, the top of the tank body is connected with the air outlet pipe and the air inlet pipe, one end of the air outlet pipe and one end of the air inlet pipe are both located inside the tank body, the other end of the air outlet pipe and the other end of the air inlet pipe are both located outside the tank body, and a supercooling double pipe and an auxiliary path inlet pipe are arranged in the tank body. The upper portion of the supercooling double pipe is connected with the upper portion of the auxiliary path inlet pipe through a tee joint, and the lower portion of the supercooling double pipe is connected with the lower portion of the auxiliary path inlet pipe through an electronic expansion valve. The supercooling coil is arranged in the gas-liquid separator, the supercooling function and the gas-liquid separation function are integrated into the gas-liquid separator, the space of the tank body is fully utilized, secondary heat exchange of a high-pressure side refrigerant and a low-pressure side refrigerant is achieved, the supercooling degree of the high-pressure side refrigerant is increased, the superheat degree of the low-pressure side refrigerant is improved, and the system performance is improved.

According to the efficient steam heat pump system with the subcooler and the control method, the outlet end of a compressor is connected with the inlet end of a condenser, the outlet end of the condenser is connected with a refrigerant inlet of the subcooler through a liquid storage device, and a refrigerant outlet of the subcooler is connected with an inlet of an evaporator through an electronic expansion valve; the evaporator outlet is connected with the inlet end of the compressor; the flow of cold water entering the subcooler is controlled through the proportional three-way adjusting valve, the water outlet end of the subcooler is connected with the water inlet end of the condenser, the flow of the cold water entering the condenser is adjusted through the flow adjusting valve, and redundant flow enters the redundant heat storage box through the electric valve. The supercooler and the redundant heat storage box are additionally arranged, so that the supercooling degree of a refrigerant is accurately controlled, the system efficiency is improved, the comprehensive utilization rate of energy can be effectively improved, and the system operation cost is reduced.

A system includes a pressure exchanger (PX) configured to receive a first fluid, receive a second fluid, and exchange pressure between the first fluid and the second fluid. The system further includes a first gas cooler, configured to provide working fluid to a first inlet of a heat exchanger and a second inlet of a heat exchanger. The heat exchanger is configured to exchange heat between fluid provided via the first inlet and fluid provided via the second inlet. A first outlet of the heat exchanger provides the first fluid to the PX. A second outlet of the heat exchanger provides the second fluid to the PX. The system further includes a receiver, configured to receive the first fluid and the second fluid from the PX. The system further includes a first compressor, configured to provide working fluid to the first gas cooler.

Systems and methods for regenerative ejector-based cooling cycles that utilize an ejector as the motivating force in a cooling loop to regeneratively sub-cool a refrigerant in a single-stage cooling cycle.

A vapour compression refrigeration system has a main refrigerant circuit having a main gas cooler or condenser arranged in a high pressure branch, a first main evaporator arranged in a first low pressure branch, a main compressor fluidically connecting the first low pressure branch to the high pressure branch, and an expansion device connecting the high pressure branch to an intermediate pressure branch. The system has a by-pass branch connecting the high-pressure branch to the intermediate pressure branch and provided with a by-pass valve, a secondary refrigerant circuit having a secondary gas cooler or condenser arranged in a secondary high pressure branch, a secondary evaporator arranged in a secondary low pressure branch, and a secondary expansion device connecting the secondary high pressure branch to the secondary low pressure branch. A rotary pressure exchanger is fluidically connected to the by-pass branch downstream of the by-pass valve and the secondary refrigerant circuit.

The invention discloses a subcooler and a deep subcooler for a refrigerating system and a control method of the subcooler and the deep subcooler, and belongs to the technical field of refrigeration. The deep subcooler comprises a subcooling heat exchange unit, an independent cold source loop and a pressure control valve; the supercooling heat exchange unit is connected between the high-pressure liquid reservoir and the throttling device in series, and the primary liquid refrigerant is deeply cooled to be equal to or close to the target value of the evaporation temperature through low-temperature cooling capacity provided by a low-pressure evaporation system or an independent cold source loop. The independent cold source is driven by a compressor with the minimum refrigerating capacity in the system, and an air return pipeline of the independent cold source is bridged with air return pipelines of other compressors of the system through an outlet pressure balance valve, so that the surplus refrigerating capacity is fully utilized. The evaporation pressure of a cold source loop is changed by monitoring the supercooled liquid temperature and feeding back and adjusting the opening degree of a pressure control valve, precise closed-loop control over the supercooled temperature is achieved, throttling flash gas can be remarkably reduced or even eliminated, the effective refrigerating capacity of unit refrigerant and the heat exchange efficiency of an evaporator are improved, and the system energy efficiency is greatly improved.

The application provides a control method, a control device and a heat pump system, and the control method comprises the following steps: obtaining the exhaust temperature of a compressor; determining whether the exhaust temperature of the compressor meets a first set temperature condition; obtaining the supercooling degree of the economizer; and adjusting the main electronic expansion valve and / or the auxiliary electronic expansion valve according to the interval range of the supercooling degree of the economizer. The application provides a control method, a control device and a heat pump system, and the supercooling degree of the economizer is detected and determined when the exhaust temperature is too high and needs to be inhibited, the supercooling degree of the economizer is detected, the auxiliary valve is adjusted while the main valve is closed, the supercooling degree of the economizer is increased, the air supplement is increased, and the exhaust temperature is reduced.

This refrigerator is provided with a refrigeration cycle, a sensor, and a control device. The refrigeration cycle has a circulation line, a first compression part, a middle stage part, a second compression part, an injection pipe, a supercooling heat exchanger, a supercooling expansion valve, a main expansion valve, an evaporator, a bypass pipe, and a bypass valve. The control device has: an acquisition part for acquiring a physical quantity related to the refrigeration cycle; a determination part for determining whether or not a supercooling degree of a refrigerant of the circulation line having passed through the supercooling heat exchanger is lower than a target value, on the basis of the physical quantity related to the refrigeration cycle; and a valve control part for controlling the bypass valve to open the bypass pipe, when the supercooling degree of the refrigerant of the circulation line having passed through the supercooling heat exchanger is lower than the target value.

The purpose of the present invention is to adjust a predetermined temperature of a vehicle-mounted device while suppressing power consumption. A vehicle air-conditioning system (1) is provided with: a heat pump unit (2) that circulates a refrigerant by repeating gas-liquid phase changes; an air-conditioning unit (3) that generates air-conditioned air, the temperature of which has been adjusted by heat exchange with a heat medium that exchanges heat with the refrigerant, and that blows the air-conditioned air out of the vehicle interior; and a device temperature adjustment means (5) for adjusting the temperature of a predetermined in-vehicle device (X) mounted on the vehicle. The heat pump unit (2) generates, for the refrigerant, at least a high-temperature refrigerant (Rh) of a first temperature, a low-temperature refrigerant (Rc) of a second temperature lower than the first temperature, and an intermediate-temperature refrigerant (Rm) of a third temperature between the first temperature and the second temperature, and the device temperature adjustment unit (5) adjusts the temperature of the in-vehicle device (X) using the intermediate-temperature refrigerant (Rm).

A method of controlling the performance of a refrigeration system includes operating first and second heat exchangers, the first to remove heat from one or both of a space where the first heat exchanger is disposed or a component within the space where the first heat exchanger is disposed. The first heat exchanger has a first set of parallel tubes between manifolds, the second heat exchanger has a second set of parallel tubes between manifolds the first and second tubes alternating in spaces between each other; Refrigerant that flows through the first set of tubes additionally flows through the second set of tubes before the refrigerant again flows through the first set of tubes. Operating a second heat exchanger that is fluidly connected with both of the first set of tubes and the second set of tubes. Insituations where a buildup of frost occurs upon one or more surfaces of the first heat exchanger during operation, continuing to operate the first heat exchanger to transfer heat from the refrigerant to the first medium thereby performing a defrost function upon the one or more surfaces of first heat exchanger.