30results about "Subcoolers" patented technology

A method is provided. The method comprises: identifying, by a processing device, first temperature data indicative of a temperature difference between a bulk fluid at a first inlet of a heat exchanger and the bulk fluid at a first outlet of the heat exchanger, fluidly coupled to the first inlet by one or more fluid channels of the heat exchanger, wherein the first outlet of the heat exchanger is fluidly coupled to a high-pressure inlet of a pressure exchanger (PX); determining, based on the first temperature data, a target adjustment of a first valve fluidly coupled to the first outlet of the heat exchanger and to a secondary fluid inlet of the heat exchanger; and causing, based on the target adjustment, actuation of the first valve.

An apparatus (1) for use in a refrigeration or heat pump system. The apparatus includes an outer casing comprising a longitudinally cylindrical shell (2) and end plates (3a, 3b) disposed at both ends of the shell, and at least three units of a refrigeration or heat pump system disposed inside the same common outer casing, the units being selected from a collection of an evaporator, a superheater, an economizer, a condenser, a desuperheater, a subcooler, and an oil cooler.

A heat source optimization system capable of alternating configurations between an air exchange system and a geothermal system and / or earth loop systems depending on an instantaneous need and / or desire for taking in or discharging heat, while simultaneously remaining operational and without reversing valving or changing the rotational direction of a refrigerant compressor. The system manages refrigerant, and, via a processor and / or controller system, determines where to obtain refrigerant and also the quantity of refrigerant to be obtained. Additionally, the system, via a processor and / or controller system, both determines the optimal location or locations from which to take in heat or to which heat is to be rejected.

To stably obtain a desired refrigeration capacity, while suppressing increase in size, an energy consumption and an environmental load.SOLUTION: A refrigeration device 10 comprises a high temperature side refrigeration circuit 20 and a low temperature side refrigeration circuit 30. A water cooler 38 is provided between a compressor and a condenser in the low temperature side refrigeration circuit 30. The refrigeration device 10 is operated in such following relations that when a refrigeration capacity of an evaporator of the low temperature side refrigerating circuit 30 is defined as CL (Kw), a compression power of the compressor of the low temperature side refrigeration circuit 30 is defined as PA (Kw), a cooling capacity of the water cooler 38 is defined as CW (Kw), a refrigeration capacity of an evaporator of the high temperature side refrigerating circuit 20 is defined as CH (Kw), a refrigerant circulation amount in the high temperature side refrigeration circuit 20 is defined as F1 (Kg / hour), and a refrigerant circulation amount of the low temperature side refrigeration circuit 30 is defined as F2 (Kg / hour), 0.25×(CL+PA)≤CW≤0.4×(CL+PA), 0.6×(CL+PA)≤CH≤0.75×(CL+PA), 0.5×PA≤CW, and F1≤F2.SELECTED DRAWING: Figure 1

An air conditioner according to an embodiment of the present disclosure comprises: a plurality of indoor units having an indoor heat exchanger; and an outdoor unit having an outdoor heat exchanger and connected to the indoor units, wherein the outdoor unit comprises: a compressor; an accumulator connected to the compressor; a supercooler for supercooling a refrigerant; a supercooling electronic expansion valve for adjusting the flow rate of the refrigerant flowing through the supercooler; a plurality of temperature sensors; a first refrigerant pipe connecting the supercooler and the accumulator to each other; a first valve provided on the first refrigerant pipe; a second refrigerant pipe connecting the supercooler and the compressor to each other; a second valve provided on the second refrigerant pipe; and a control unit for diagnosing a failure of the supercooling electronic expansion valve on the basis of temperature data measured by the plurality of temperature sensors in a state in which the first valve or the second valve is opened.

This utility model relates to an improved heat pump device for a heat source tower, comprising a compressor. The compressor's exhaust port passes sequentially through an oil separator, a condenser, a subcooler, an expansion valve, and an evaporator before being connected to the compressor's suction port, forming a refrigerant circulation loop. The cooling water inlet and outlet of the condenser are connected to the heat source tower. The chilled water inlet and outlet of the evaporator are also connected to the heat source tower. Furthermore, the cooling water inlet and outlet of the condenser, and the chilled water inlet and outlet of the evaporator, are also connected to a client. The coolant inlet and outlet of the subcooler are connected to an external recyclable cold source via a first input pipe and a first output pipe, respectively, forming a coolant loop. Therefore, this utility model can effectively achieve the subcooling effect of high-pressure refrigerant and the cooling effect of refrigeration oil, achieving energy saving and cost reduction, and fully meeting market demands.

A thermal circulation system includes a working fluid that circulates in a loop comprising a compressor (10), a condenser (11a, 11b), an expander unit (130), and an evaporator (14). The expander unit (130) is configured to generate rotary mechanical motion. The expander unit (130) is connected between the outlet of the condenser (11a, 11b) and the inlet of the evaporator (14). The pressure drop of the working fluid through the condenser is less than about 5 bar.

The utility model discloses a water chilling unit, including compressor, condenser, evaporimeter, liquefied heat exchanger, the compressor includes first cooling device, motor, the first cooling device is used for the motor cooling heat dissipation, including first port, second port, is used respectively for input condensed refrigerant, and exports the refrigerant after cooling, the liquefied heat exchanger includes refrigerant passage, heat transfer medium channel, the refrigerant passage includes third port, fourth port, its respectively with second port, evaporimeter is connected, and the refrigerant after cooling is cooled liquefaction and returns evaporimeter, the heat transfer medium channel includes fifth port, sixth port, its respectively with the heat transfer medium inlet of evaporimeter, heat transfer medium outlet is connected, the utility model discloses the refrigerant after cooling is condensed liquefaction as liquid state and is delivered to evaporimeter, prevents the refrigerant after cooling and influences evaporimeter's heat exchange efficiency and compressor suction liquid, improves heat exchange efficiency and protects compressor, prolongs compressor life.

The present disclosure provides a cooling system comprising a primary refrigerant circuit wherein a primary refrigerant fluid is circulated through a heat exchanger and one or more of: an evaporator, a compressor, a metering device and a condenser; and a secondary refrigerant circuit wherein a secondary refrigerant fluid is circulated through the heat exchanger and a fluid cooler, wherein the secondary refrigerant circuit uses carbon dioxide as the secondary refrigerant fluid and does not include any compression components in order to provide passive subcooling to the primary refrigerant fluid.

A first circuit (2) for the first refrigerant fluid and a second circuit (3) for the second refrigerant fluid, A first heat exchanger (4) is positioned on the first circuit (2) for heat exchange between a first refrigerant fluid and a first heat transfer fluid, A first compressor (5) is located downstream of the first heat exchanger (4) on the first circuit (2), A second heat exchanger (6) interposed between a first circuit (2) and a second circuit (3) for heat exchange between a first refrigerant fluid and a second refrigerant fluid, the second heat exchanger (6) being located downstream of the first compressor (5) on the first circuit (2), A first expansion valve (7) is located downstream of the second heat exchanger (6) on the first circuit (2), A second compressor (8) is located downstream of the second heat exchanger (6) on the second circuit (3), A third heat exchanger (9) is located downstream of the second compressor (8) on the second circuit (3) for heat exchange between the second refrigerant fluid and the second heat transfer fluid, A heat pump module (1) including the following.

The present invention relates to a carbon dioxide liquefaction system for a ship and, more specifically, to a carbon dioxide liquefaction system for a ship, comprising: a capture cycle in which carbon dioxide is captured from exhaust gas; and a liquefaction cycle in which the carbon dioxide captured in the capture cycle is liquefied. The liquefaction cycle comprises: an evaporator which evaporates a refrigerant; a compressor which compresses the refrigerant; a condenser which condenses the refrigerant in a gas state; and an expansion valve for expanding the refrigerant in a liquid state. The carbon dioxide liquefaction system for a ship enables the carbon dioxide captured by the evaporator to be liquefied, thereby storing the carbon dioxide captured from exhaust gas of a ship with a minimized volume, while as much carbon dioxide as possible is liquefied and stored by using the same amount of refrigerant.

The purpose of the present invention is to reduce a noise that is caused by the flow of a refrigerant. This air conditioner is provided with: a compressor that compresses a refrigerant; a heat exchanger (9) that exchanges heat between the refrigerant and another medium; an expansion valve that expands the refrigerant; a supercooling heat exchanger (20) that supercools the refrigerant; and refrigerant supply lines (30, 40) that supply the refrigerant to the supercooling heat exchanger (20). The refrigerant supply lines (30, 40) has: branch pipes (32) which cause the refrigerant to branch into a plurality of branch parts; first turbulence inhibition pipes (33, 43) each having one end connected to one of the plurality of branch parts; and second turbulence inhibition pipes (34, 44) each having one end connected to one of the plurality of branch parts. The other ends of the first turbulence inhibition pipes (33, 43) and the second turbulence inhibition pipes (34, 44) are connected to the supercooling heat exchanger (20).

A refrigerant circuit for a thermal management system and a method of operating the same are disclosed. The refrigerant circuit comprises a compressor, a condenser, an economizer, and an evaporator. The compressor has a discharge side, a suction side, and an injection side. A first bypass recirculation discharge fluid line for selectively providing fluid communication between the discharge side and the injection side of the compressor, and a second bypass recirculation discharge fluid line for selectively providing fluid communication between the discharge side and the suction side of the compressor.

The present application relates to air conditioning technical field, especially a kind of heat exchanger and air conditioning system, heat exchanger includes gas collector, heat exchange tube, liquid collector and supercooling tube, heat exchange tube is vertically arranged, the upper end of heat exchange tube is communicated with gas collector, the lower end of heat exchange tube is communicated with liquid collector, supercooling tube is set in the outside of liquid collector, and supercooling tube is surrounded with liquid collector and is set out heat exchange chamber, supercooling tube is equipped with the first pipe opening and second pipe opening communicated with heat exchange chamber, one of first pipe opening and second pipe opening is suitable for the refrigerant of heat exchange chamber input and liquid collector heat exchange, another is suitable for the refrigerant of heat exchange chamber output and liquid collector heat exchange.In heating state, supercooling tube can further raise the temperature of the bottom of the heat exchanger where liquid collector is located, prevent water vapor in air from condensing and icing in the bottom of heat exchanger in low temperature environment, avoid the problem of difficult drainage caused by icing, and with the passage of time, ice layer height gradually increases, seriously affect the heat exchange efficiency of microchannel heat exchanger.

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. In situations where a build-up 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.

The utility model provides a sectional type big temperature difference water source heat pump unit relates to heat pump unit technical field, including heat pump module, heat pump module includes first stage heat pump unit and second stage heat pump unit, and each stage heat pump module is equipped with cold water inlet and hot water inlet, and cold water inlet and hot water inlet all are connected to external water source pipeline through mechanical valve group, and mechanical valve group contains series connection mode interface and parallel mode interface, and through manual operation switches waterway series connection topology structure. The utility model has realized through the cold water inlet, hot water inlet of each stage heat pump module through mechanical valve group connection, and contains series connection and parallel interface and switches waterway through valve handle operation, and when series connection, low temperature water source flows through multistage evaporator and gradually reduces temperature, and when parallel, high temperature water source shunts to each stage evaporator, adapts small temperature difference demand, reaches the effect of improving application range, increases energy efficiency.

A cold storage cold storage and subcooling refrigeration system and control method are disclosed. The refrigeration system includes a compressor, oil separator, condenser, liquid storage tank, dryer filter, cold storage unit, subcooler, evaporator, gas-liquid separator, water tank, water pump, electronic expansion valve, shut-off valve, control device, and information acquisition device. The information acquisition device collects load-related parameters in real time, calculates the real-time load of the cold storage, compares it with the design load, and determines the system operating status. The control device meets the cooling demand of the cold storage by adjusting the start-stop and operating frequency of the compressor unit and the opening degree of the electronic expansion valve. It also achieves intelligent switching between three modes: normal cooling, combined cold storage and subcooling cooling, by dynamically adjusting the shut-off valve, electronic expansion valve, and water pump. This system, through the coordinated operation of cold storage and subcooling, stores cold energy during low-load periods and releases cold energy during high-load periods to increase the subcooling degree of the refrigerant, significantly improving system energy efficiency and operational stability, and is suitable for the high-efficiency and energy-saving operation of cold storage.

The application belongs to the technical field of refrigeration and heat pump, and discloses a magnetic coupling carbon dioxide refrigeration cycle system and a control method thereof; wherein the magnetic coupling carbon dioxide refrigeration cycle system comprises a compressor, a gas cooler, a magnetic supercooler, a throttling valve, an evaporator and a liquid accumulator; the magnetic supercooler comprises a cold-end heat exchanger, a hot-end heat exchanger, an active magnetic regenerator and a reciprocating fluid driving unit; the outlet of the compressor is connected in sequence with the refrigerant channel of the gas cooler, the refrigerant channel of the cold-end heat exchanger, the throttling valve, the evaporator, the liquid accumulator and the inlet of the compressor; the active magnetic regenerator is filled with a magnetic heat material, and the magnetic heat material is adapted to the working temperature range of the heat exchange medium. The application solves the matching problem of the magnetic supercooler and the transcritical carbon dioxide cycle, can improve the overall energy efficiency of the system, is suitable for stable operation in multiple scenes, and has high engineering application value.

Disclosed in embodiments of the present application is a heating, ventilation and air conditioning device. The heating, ventilation and air conditioning device comprises an indoor assembly, an outdoor assembly, a gas pipe assembly, and a liquid pipe assembly; the indoor assembly comprises at least one indoor unit; the outdoor assembly comprises at least one outdoor unit; and the gas pipe assembly is connected to the indoor unit and the outdoor unit, and the liquid pipe assembly is connected between the indoor unit and the outdoor unit, such that the indoor unit and the outdoor unit form refrigerant circulation by means of the gas pipe assembly and the liquid pipe assembly.

A refrigeration apparatus includes a main refrigeration circuit in which a first refrigerant is sealed, a supercooling refrigeration circuit in which a second refrigerant is sealed and connected to a supercooling heat exchanger, and a controller. The supercooling heat exchanger supercools the first refrigerant in the main refrigeration circuit. In superheating degree setting control, the controller sets a target value of a degree of superheat of the second refrigerant on an outlet side of the supercooling heat exchanger to a first value when a refrigeration request degree is a first request value, and sets the target value of the degree of superheat to a second value larger than the first value when the refrigeration request degree is a second request value lower than the first request value. In superheating degree control, the controller controls a second expansion mechanism based on the target value of the degree of superheat.

A refrigerant circuit for a heat management system and a method for operating the same are disclosed. The refrigerant circuit comprises a compressor, a condenser, a preheater, and an evaporator. The compressor has an outlet side, an intake side, and an injection side. A first bypass recirculation outlet fluid line provides selective fluid communication between the outlet side and the injection side of the compressor, and a second bypass recirculation outlet fluid line provides selective fluid communication between the outlet side and the intake side of the compressor.

The present application belongs to the technical field of heat pump system, and particularly relates to a kind of injection type air supplementing and enthalpy increasing system with economizer.The existing air supplementing and enthalpy increasing technology is difficult to balance "heating capacity, energy efficiency" under extremely cold working conditions, and it is difficult to improve the all-weather adaptability and low-temperature endurance performance of new energy vehicles.In view of the above problems, the present application provides a kind of injection type air supplementing and enthalpy increasing system with economizer, which comprises a heating system and a refrigeration system, and the heating system and the refrigeration system realize mode free switching through a reversing valve;The present application systematically solves the industry problem that the existing air supplementing and enthalpy increasing technology is difficult to balance "heating capacity, energy efficiency, cost, reliability" under extremely cold working conditions through the coupling design of ejector and economizer, the function deconstruction of double gas-liquid separator and the collaborative control of valve group, and provides a feasible and effective solution to improve the all-weather adaptability and low-temperature endurance performance of new energy vehicles.

The present application relates to air conditioning technical field, especially a kind of air conditioning system, including heat exchanger and indoor heat exchange unit, heat exchanger includes gas collector, heat exchange tube, liquid collector and supercooling tube, heat exchange tube is vertically arranged, the upper end of heat exchange tube is communicated with gas collector, the lower end of heat exchange tube is communicated with liquid collector, supercooling tube is sleeved on the outside of liquid collector, and supercooling tube is surrounded with liquid collector and is set out heat exchange chamber, supercooling tube is equipped with first pipe opening and second pipe opening communicated with heat exchange chamber, first pipe opening is suitable for heat exchange chamber input refrigerant, second pipe opening is suitable for heat exchange chamber output refrigerant, liquid collector is equipped with connecting pipe, connecting pipe is arranged in supercooling tube and is communicated with liquid collector, connecting pipe is also communicated with indoor heat exchange unit, connecting pipe and indoor heat exchange unit are communicated with the pipeline, and branch pipeline is also communicated with the pipeline, branch pipeline is communicated with first pipe opening, and branch pipeline is equipped with first expansion valve. Avoid the problem that drainage difficulty caused by icing seriously influence microchannel heat exchanger heat exchange efficiency.

This application discloses a condensing device and a heat pump system including the same. The condensing device includes: a shell; and at least two sets of heat exchange tube bundles, where each set of heat exchange tube bundles includes a condensing tube bundle and a subcooling tube bundle, and the subcooling tube bundle is arranged below the corresponding condensing tube bundle, where the at least two sets of heat exchange tube bundles are configured to circulate the cooling medium independently, to enable the cooling medium in each set of heat exchange tube bundles to perform heat exchange with the refrigerant in the heat exchange accommodating cavity independently. Two subcoolers are arranged in a same shell of the condensing device of this application, where one subcooler may be used in an independent refrigeration mode, and the other subcooler may be used in a water heating mode. In the independent refrigeration mode, the subcooler can improve the refrigeration performance of the heat pump system. In the water heating mode, in addition to improving the performance of the heat pump system, the subcooler can further reduce the size of an economizer in the heat pump system, and finally reduce the occupied area of the unit.

A suction-capillary tube assembly 1 includes: a main pipe 10 including a suction hole 11 and a capillary hole 12 formed in a longitudinal direction; a first terminal suction pipe 20 disposed at one end of the suction hole 11 of the main pipe 10 to communicate with the suction hole; and a first terminal capillary pipe 40 disposed at one end of the capillary hole 12 of the main pipe 10 to communicate with the capillary hole 12.

A dehumidification system includes a compressor, a primary evaporator, a primary condenser, a secondary evaporator, and a secondary condenser. The secondary evaporator receives an inlet airflow and outputs a first airflow to the primary evaporator. The primary evaporator receives the first airflow and outputs a second airflow to the secondary condenser. The secondary condenser receives the second airflow and outputs a third airflow to the primary condenser. The primary condenser receives the third airflow and outputs a dehumidified airflow. The compressor receives a flow of refrigerant from the primary evaporator and provides the flow of refrigerant to the primary condenser.

A heating system (110) for heating a main fluid, a first circuit (2) for a first refrigerant fluid and a second circuit (3) for a second refrigerant fluid, a first heat exchanger (4) arranged on the first circuit (2) for heat exchange between the first refrigerant fluid and a first heat transfer fluid, a first compressor (5) arranged downstream of the first heat exchanger (4) on the first circuit (2), a second heat exchanger (6) interposed between the first circuit (2) and the second circuit (3) for heat exchange between the first refrigerant fluid and the second refrigerant fluid, the second heat exchanger (6) being arranged downstream of the first compressor (5) on the first circuit (2), a first expansion valve (7) arranged downstream of the second heat exchanger (6) on the first circuit (2), a second compressor (8) arranged downstream of the second heat exchanger (6) on the second circuit (3), a third heat exchanger (9) arranged downstream of the second compressor (8) on the second circuit (3) for heat exchange between the second refrigerant fluid and a second heat transfer fluid, at least one heat pump module (1) including, a heat exchange device (101) operatively associated with at least the second heat transfer fluid, a heating system (110) including, a distribution network (120) for distributing the main fluid to a plurality of users, a district heating plant (100) including.

The embodiment of the application provides a supercooling degree control method and device, a storage medium and a refrigeration equipment. In the case that the supercooling degree at the fluorine pump inlet is less than a first preset supercooling degree, a flow regulating valve arranged in a bypass pipeline is opened to a preset opening degree, the bypass pipeline is used for connecting the outlet and the inlet of the fluorine pump; after the flow regulating valve is opened to the preset opening degree for a preset time length, it is judged whether the supercooling degree at the fluorine pump mixing inlet between the fluorine pump and the inlet is greater than or equal to the first preset supercooling degree; if not, the target bypass flow of the refrigerant is determined, and the target opening degree of the flow regulating valve corresponding to the target bypass flow is determined according to a preset mapping relationship, the preset mapping relationship includes a plurality of bypass flows and the flow regulating valve opening degrees corresponding to the bypass flows; the flow regulating valve is opened to the target opening degree, the opening degree of the flow regulating valve corresponding to the bypass flow to be adjusted is obtained through the preset mapping relationship, the time for supercooling degree adjustment is saved, and the reliability of fluorine pump operation is ensured.

A system includes a pressure exchanger configured to receive a first fluid via a high-pressure input (HPIN) port, receive a second fluid via a low-pressure input (LPIN) port, exchange pressure between the first and second fluids, and supply the first fluid via a low-pressure output (LPOUT) port and the second fluid via a high-pressure output (HPOUT) port. The system also includes a main gas cooler coil configured to provide a main gas cooler coil outlet flow split into a first flow and a second flow. The system further includes a first heat exchanger configured to: subcool the first flow and supply the first flow to the high-pressure input of the pressure exchanger; and convert the second flow into a two-phase liquid-gas mixture and supply the two-phase liquid-gas mixture to the first heat exchanger to absorb heat from the first flow and subcool it.