238results about "Superheaters" patented technology

The utility model provides a high-power refrigerating and heating device, which belongs to the technical field of refrigerating and heating and comprises a power mechanism, a multi-linkage transmission mechanism and a plurality of solid elastic clamping heat regenerators. The multi-linkage transmission mechanism is provided with a power input end and a plurality of power output ends, and the power input end is connected with the power mechanism; and the plurality of solid elastic clamping heat regenerators are respectively connected with different power output ends on the multi-linkage transmission mechanism so as to refrigerate or heat under the driving of the power output ends. According to the multi-linkage transmission mechanism, a set of power mechanism can be utilized to drive a plurality of solid elastic clamping heat regenerators suitable for operation of elastic clamping materials to conduct refrigeration or heating, then the solid elastic clamping heat regenerators are gathered, and enough heating capacity or refrigerating capacity can be obtained; in this way, the problem that materials cannot bear the heat due to the fact that the solid elastic clamping heat regenerator is designed to be too large can be solved, enough heating capacity or refrigerating capacity can be provided, and the requirements in practical application are met.

The utility model provides an easy-to-assemble heat regeneration device of a solid elastic card and a refrigerating and heating device.The easy-to-assemble heat regeneration device of the solid elastic card comprises a sleeve, a plurality of solid elastic card material plates stacked in the sleeve and a pressing head for applying stress to the solid elastic card material plates, the sleeve is composed of a plurality of parts, and the pressing head is connected with the sleeve. When being unfolded, the plurality of solid elastic clamping material plates are inspected or assembled and disassembled; each solid elastic clamping material plate is provided with a flow cavity after being stacked, a heat-conducting medium exchanges heat with the solid elastic clamping material plates through the flow cavities when heat or cold is generated, and the heat-conducting medium flows into a heat exchanger through a liquid through hole in the pressure head for heat exchange. According to the utility model, the sleeve is designed into a plurality of detachable parts or folding parts, so that a plurality of solid elastic clamping material plates can be conveniently put in and aligned during assembly, even if a certain solid elastic clamping material plate goes wrong in the loading and unloading process, the solid elastic clamping material plate can be conveniently opened for inspection, the assembly efficiency is improved, and the fault solving efficiency is also improved.

The invention relates to the technical field of sample storage, particularly provides a cascade refrigeration system and a control method of an ultralow-temperature sample library, and aims to solve the problem that normal operation of a unit is affected due to abnormal oil return of an existing cascade refrigeration system. In order to achieve the purpose, the cascade refrigeration system comprises a high-temperature-stage refrigeration unit, a low-temperature-stage refrigeration unit and an intermediate heat exchanger, the low-temperature-stage refrigeration unit comprises a low-temperature compressor, an oil separation device and a heat exchange device, the oil separation device comprises a plurality of oil separators arranged in sequence, and a heat exchanger is arranged between every two adjacent oil separators; the low-temperature compressor, the oil separation device, the intermediate heat exchanger and the heat exchange device are communicated with one another to form a low-temperature-stage refrigerant circulation loop, and the high-temperature-stage refrigeration unit and the intermediate heat exchanger are communicated with one another to form a high-temperature-stage refrigerant circulation loop. The oil separation efficiency can be improved, deep oil removal is achieved, and oil return is remarkably improved.

A combined heat exchanger, a heat exchange system, and an optimization method thereof are provided. The heat exchange system includes: an enhanced vapor injection compressor, a condenser, an expansion valve and an evaporator, which are located in a main circuit; wherein the heat exchange system further includes a first branch branched from the main circuit to an vapor injection port of the compressor at a branch point P downstream of the condenser, and a first heat exchange unit and a second heat exchange unit are further provided in the main circuit between the branch point P and the expansion valve; and wherein a refrigerant leaving the condenser is divided at the branch point P into a first portion passing through the first heat exchange unit and the second heat exchange unit from the main circuit, and a second portion passing through the first branch to the vapor injection port.

The utility model provides a top pressure power transmission mechanism and a refrigerating and heating device, and belongs to the technical field of transmission equipment. The jacking power transmission mechanism comprises a driving rod and a pressing head, and the jacking head is arranged at one end of the driving rod; the pressing head is provided with a bearing groove, and the jacking head can abut against the bottom of the bearing groove so that jacking power can be transmitted to the pressing head through the driving rod. The refrigerating and heating device comprises a power mechanism, the top pressure power transmission mechanism and a solid elastic clamping heat regenerator. The power mechanism is used for outputting power. The jacking power transmission mechanism is matched with the power mechanism so as to receive power output by the power mechanism; and the solid elastic clamping heat regenerator is connected with a pressure head of the jacking power transmission mechanism so as to refrigerate or heat under the driving of the pressure head. Under the working conditions of large bearing capacity and long-term abrasion, the conditions of fracture and failure cannot occur, and therefore stable transmission of jacking power can be achieved.

The utility model provides a heat regeneration device and a refrigerating and heating device, the heat regeneration device comprises a sleeve and solid elastic clamping material plates, the inner wall of the sleeve comprises protrusions, the multiple solid elastic clamping material plates are stacked in the sleeve, each solid elastic clamping material plate comprises a groove, a space formed by stacking the multiple grooves is used for containing the protrusions on the inner wall of the sleeve, and the protrusions are arranged on the inner wall of the sleeve. After the grooves are stacked, gaps between the grooves and the protrusions form flow cavities for heat conduction fluid to flow through. The protrusions are arranged on the inner wall of the sleeve and extend into the grooves of the solid elastic clamping material plate, the position of the solid elastic clamping material plate can be fixed, flow resistance of gaps between the grooves and the protrusions is small, and heat conduction efficiency is improved. In addition, the contact area between the flow cavity and the solid elastic clamping material is large, and the heat conduction efficiency of the heat conduction fluid is further improved.

The system comprises a power generation system and a heat supply system, the power generation system comprises a boiler, a carbon dioxide turbine, a heat regenerator, a precooler, a compressor and a motor generator, an outlet of the boiler is connected with an inlet of the turbine, an outlet of the turbine is connected with a hot side inlet of the heat regenerator, and an outlet of the compressor is connected with a hot side inlet of the precooler. An outlet of the precooler is connected with an inlet of the compressor, an outlet of the compressor is connected with a cold-side inlet of the heat regenerator, a cold-side outlet of the heat regenerator is connected with an inlet of the boiler, and the compressor and the turbine are respectively connected with the motor generator. The heat supply requirement can be met, complete thermoelectric decoupling is achieved, and the flexibility of the supercritical carbon dioxide cycle generator set is fully exerted while stable heat supply is achieved.

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 a pulse tube refrigeration device based on a semiconductor refrigeration ring. The device comprises a compressor, a precooler, a heat regenerator, a cold-end heat exchanger, a pulse tube, a hot-end heat exchanger, a reducing cavity, an adjusting tube and an air reservoir which are communicated in sequence. The semiconductor refrigeration sleeve is arranged outside the heat regenerator, and the surfaces of the semiconductor refrigeration sleeve and the heat regenerator are tightly attached. The semiconductor refrigeration sleeve is formed by overlapping a plurality of annular semiconductor refrigeration sheets, the hot surface of each semiconductor refrigeration sheet faces upwards, the cold surface of each semiconductor refrigeration sheet faces downwards, and the cold and hot surfaces of every two adjacent semiconductor refrigeration sheets are connected through heat-conducting silicone grease. Temperature sensors are arranged at the top and the bottom of the semiconductor refrigeration sleeve to monitor the temperature difference in real time, and the control system adjusts the input current of the semiconductor refrigeration piece and adjusts the refrigeration power of the semiconductor refrigeration piece. Through the stacked structure of the semiconductor refrigeration rings, step-by-step reduction of the temperature is achieved, the cooling efficiency is remarkably improved, and accurate temperature control can be conducted. The device is compact in structure, high in reliability and suitable for the working environment with the high requirement for equipment stability.

The invention relates to the technical field of ultralow-temperature treatment equipment, in particular to a cascade refrigeration system for a cold therapy instrument, which comprises a first-stage compression cycle module, a second-stage compression cycle module, a third-stage compression cycle module, a fourth-stage compression cycle module, a fifth-stage compression cycle module and a sixth-stage compression cycle module, the first-stage compression circulation module is connected with the second-stage compression circulation module in parallel through the first heat exchanger, and a second heat exchanger and a composite evaporator are arranged on the second-stage compression circulation module; and the third-stage compression circulation module is connected with the second-stage compression circulation module in parallel through the second heat exchanger, and the third-stage compression circulation module is communicated with the composite evaporator. The air conditioner has the effect of increasing the refrigerating temperature range.

The invention discloses an ultrahigh-temperature compressed air energy storage system and method, and relates to the technical field of heat energy engineering. The system comprises a compression energy storage subsystem, an expansion power generation subsystem, a heat regenerator and a fused salt heat storage loop. The compression energy storage subsystem comprises a compressor unit and a heat storage heat exchanger unit, and the expansion power generation subsystem comprises a heat release heat exchanger unit and an expansion unit which alternately operate in time; the heat storage heat exchanger set, the heat regenerator and the compressor set which are used for storing compression heat in the compression process, and the heat release heat exchanger set, the heat regenerator and the expansion set which are used for releasing heat to heat air in the expansion process can be integrated into the same physical equipment set. According to the invention, ultrahigh-temperature compression can be realized, a heat storage temperature area is perfectly matched with binary nitrate solar salt, a low-temperature heat storage system is omitted, the problems of low energy storage efficiency, complex system and high cost of existing compressed air are solved, step-type improvement of efficiency is realized, the system is simplified, and the cost is obviously reduced.

Disclosed is a heat pump system for a vehicle that includes: a compressor which compresses and discharges a refrigerant; an indoor heat exchanger which is provided in an air-conditioning case and exchanges heat with air discharged into the indoor space of the vehicle; an outdoor heat exchanger which is provided on the outer portion of the air-conditioning case and exchanges heat with external air; and a first expansion valve which expands the refrigerant, and the heat pump system carries out heating and cooling of the indoor space of the vehicle through the indoor heat exchanger while controlling the flow of the refrigerant discharged from the compressor, wherein the indoor heat exchanger is divided into a plurality of columns on an air passage in the air-conditioning case and includes a refrigerant direction switching portion which controls the flow of the refrigerant.

The spherical hinge structure comprises a connecting assembly and a plugging assembly, the connecting assembly comprises a first connecting piece and a second connecting piece, the plugging assembly comprises a first plugging piece and a second plugging piece, and a sealing ring is arranged in an annular groove of the second connecting piece, so that the sealing ring is arranged in the annular groove of the second connecting piece; the matching sizes of the sealing ring, the groove and the inner wall of the cavity are controlled to form uniform and moderate compression amount, so that local stress concentration is avoided, and the surface friction loss of the sealing ring is greatly reduced. Moreover, a floating gap exists between the plugging assembly and the connecting assembly, so that the sealing ring can automatically adjust the position relation in the moving process, the sealing ring is prevented from bearing too large lateral force, a stable working environment is provided for the sealing ring, and it is ensured that the sealing ring can still maintain reliable sealing performance under the working condition of long-term reciprocating motion.

The present application relates to the technical fields of refrigeration and low temperature engineering, and provides a kind of refrigerator, including first refrigeration unit, second refrigeration unit, connecting plate and flexible connecting piece, the two sides of connecting plate are formed room temperature side and low temperature side respectively, first refrigeration unit is connected with connecting plate, and the two ends of first refrigeration unit are arranged in room temperature side and low temperature side respectively, second refrigeration unit is connected with connecting plate, and the two ends of second refrigeration unit are arranged in room temperature side and low temperature side respectively, flexible connecting piece is arranged in one side of room temperature side, one end of flexible connecting piece is connected with first refrigeration unit or second refrigeration unit, and the other end of flexible connecting piece is connected with connecting plate.The deformation of the parts of first refrigeration unit and second refrigeration unit can be compensated by the deformation of flexible connecting piece in room temperature side, so as to avoid serious deformation, and the low temperature side does not need to use redundant flexible connecting mechanism, to realize the increase of heat transfer efficiency and the improvement of refrigeration performance.

The application discloses a magnetic pressure coupling refrigeration device, which comprises a water piston, a hot-end heat exchanger, a cold-end heat exchanger, a magnetic pressure regenerator, a first driving member and a second driving member. The water piston comprises a piston cylinder, a pear-shaped workpiece and two pistons arranged in the piston cylinder. The two pistons are symmetrically arranged on the two sides of the pear-shaped workpiece and abut against the pear-shaped workpiece. The left cavity and the right cavity of the water piston are sequentially communicated with the hot-end heat exchanger, the cold-end heat exchanger and the magnetic pressure regenerator through pipelines. A plurality of electromagnetic valves are arranged on the pipelines. The outer periphery of the magnetic pressure regenerator is sleeved with double-layer concentric Halbach magnets. The first driving member is connected to the pear-shaped workpiece and the inner-layer concentric Halbach magnet. The second driving member is connected to the pear-shaped workpiece and used for driving the pear-shaped workpiece to move horizontally along the piston cylinder. The device combines the magnetic heat effect and the pressure heat effect, adopts a clever structure design, realizes the magnetic pressure coupling refrigeration, reduces the volume of the refrigeration device and improves the refrigeration efficiency of the refrigeration device.

The present application provides a vapor compression heat pump and compression-ejection heat pump system, belonging to the technical field of heat pump. The compressor has a refrigerant vapor passage connected with a heat supplier, the heat supplier also has a condensate pipeline connected with a distribution chamber through a nozzle, the distribution chamber has a refrigerant vapor passage connected with the high-pressure steam inlet of an ejector, the distribution chamber also has a condensate pipeline connected with an evaporator through a throttle valve, the evaporator also has a refrigerant vapor passage connected with the low-pressure steam inlet of the ejector, the ejector also has a medium-pressure refrigerant vapor passage connected with the compressor; the heat supplier also has a heated medium passage connected with the outside, the evaporator also has a low-temperature heat medium passage connected with the outside, forming a vapor compression heat pump.

The invention belongs to the technical field of oil gas recovery, and discloses an ultralow-temperature condensation and ultralow-emission oil gas recovery system and method.A component self-adaptive gradient matching mixed working medium is adopted to be matched with a single-stage inverter compressor, oil gas component online detection and an AI algorithm are combined, the working medium ratio can be dynamically adjusted so as to accurately meet the refrigeration requirements of oil gas with different components, and the oil gas recovery efficiency is improved. A complicated cascade refrigeration structure is not needed, so that the operation stability is improved while the system is simplified; due to the design of the integrated composite heat exchanger, the heat exchange structure is optimized, the cold energy loss is reduced, the heat exchange efficiency is improved, a stable ultralow-temperature cold source is provided for oil-gas deep condensation separation, and oil-gas deep separation is guaranteed from the refrigeration end; the pre-separation module integrates multiple pretreatment functions, strictly controls the cleanliness of oil gas through a secondary pretreatment mechanism, removes impurities in the oil gas, prevents the impurities from blocking, abrading and other influences on the system in an ultralow-temperature environment, and guarantees continuous operation of the system.

This invention improves the cycle performance of a refrigeration cycle device that has an accumulator. This invention comprises: a compressor (31) for intaking, then compressing and discharging, a refrigerant; a heat radiator (15) for dissipating heat of the refrigerant discharged from the compressor (31); a decompression unit (32) for decompressing the refrigerant for which heat has been dissipated by the heat radiator (15); an evaporation unit (14) for causing the refrigerant that has been decompressed at the decompression unit (32) to evaporate; an accumulator for separating out the gas and liquid of the refrigerant evaporated by the evaporation unit (14) and draining out the gas-phase refrigerant; and a superheating unit (34) for superheating the refrigerant drained out from the accumulator by heat exchange with a heating medium of a higher temperature than the refrigerant drained out from the accumulator (33).

The invention provides a catalyst regeneration energy recovery heat pump device, and belongs to the technical field of refrigeration and heat pumps. An air channel outside is communicated with the charring-regeneration system through a heat source regenerator, the charring-regeneration system is further provided with a smoke channel which is communicated with the outside through a heat exchanger and the heat source regenerator, and a compressor is provided with a circulating working medium channel which is communicated with an expansion machine through the heat exchanger. The expansion machine is divided into two paths after being communicated with a heat supply device through a circulating working medium channel, the first path is communicated with a heat regenerator through a second expansion machine, the second path is directly communicated with the heat regenerator, then the heat regenerator is communicated with an evaporator through a condensate pipeline and a throttling valve, and the evaporator is communicated with the heat regenerator through a circulating working medium channel; the heat regenerator communicates with the compressor through a cycle working medium channel. The heat supplier communicates with the outside through a heated medium channel, the evaporator communicates with the outside through a low-temperature heat medium channel, the expansion machine and the second expansion machine are connected with the compressor and transmit power, and the catalyst regeneration energy recovery heat pump device is formed.

The invention provides a fourth-class thermally-driven injection-absorption heat pump, and belongs to the technical field of refrigeration and heat pumps. An absorber is communicated with a generator through a solution pump and a solution heat exchanger, the generator is communicated with the absorber through the solution heat exchanger, the generator is communicated with a low-pressure steam inlet of an ejector, the ejector is communicated with a condenser, the condenser is communicated with a steam generator through a booster pump, and the steam generator is communicated with a high-pressure steam inlet of the ejector. The condenser is communicated with the evaporator through a throttling valve, the evaporator is communicated with the absorber, a low-temperature heat medium channel is arranged outside the evaporator and communicated with the compressor, the compressor is communicated with the second compressor through the low-temperature heat medium channel and the evaporator, and the second compressor is communicated with the expansion machine through the low-temperature heat medium channel and the condenser. The expansion machine is communicated with the outside through a low-temperature heat medium channel, the steam generator and the generator are communicated with the outside through high-temperature heat medium channels, the absorber and the condenser are communicated with the outside through heated medium channels, and the fourth-class thermally-driven injection-absorption heat pump is formed.

The invention provides a refrigerant circulation loop control method, a photovoltaic heat pump system and a photovoltaic air conditioning system. The refrigerant circulation loop control method comprises the steps that the exhaust temperature and the suction superheat degree of a compressor in a refrigerant circulation loop and the pipe wall temperature of an evaporator are detected in real time, and the refrigerant circulation loop comprises the compressor, a condenser, a throttling device and the evaporator which are connected through a pipeline; and under the condition that it is determined that preset conditions are met according to the exhaust temperature, the suction superheat degree and the pipe wall temperature, a refrigerant at an inlet of the compressor and a refrigerant at an outlet of the condenser are controlled to conduct heat exchange.

The utility model discloses a regenerator, cryopump and refrigerator, including admission plug, regenerator casing, exhaust plug, said regenerator casing one end is fixedly connected with admission plug, the other end is detachably fixed with exhaust plug, admission plug, regenerator casing, exhaust plug fixed enclosure form the cavity, be equipped with internal packing. According to the utility model, through a detachable connection mode, the quantity, the weight, the type and the like of the filler in the regenerator can be simply adjusted, the regenerator does not need to be reprocessed, and the adjustment of the cooling capacity can be realized.

The invention provides a catalyst regeneration energy recovery heat pump system, and belongs to the technical field of refrigeration and heat pumps. An air channel outside is communicated with the charring-regeneration system through a heat source regenerator, the charring-regeneration system is further communicated with the outside through a smoke channel via a heat exchanger and the heat source regenerator, the charring-regeneration system is further communicated with the heating furnace through a CO-rich smoke channel, and the heating furnace is further communicated with the outside through a smoke channel via the heat exchanger and the heat source regenerator. The compressor is provided with a circulating working medium channel which is communicated with the expansion machine through the heat exchanger and the heating furnace, the expansion machine is further provided with the circulating working medium channel which is divided into two paths, the first path is communicated with the heat supplier, and the second path is communicated with a high-pressure steam inlet of the ejector. The ejector communicates with the compressor through a medium-pressure cycle working medium channel. And the heat supplier and a heated medium channel, and the evaporator and a low-temperature heat medium channel are respectively communicated with the outside to form a catalyst regeneration energy recovery heat pump system.

A method is directed to controlling superheat in a refrigerant circuit containing working fluid. The method includes directing a suction stream of the working fluid from the evaporator through the suction heat exchanger and directing the working fluid compressed by the compressor to the suction heat exchanger. The method also includes controlling a flowrate of the compressed working fluid through the suction heat exchanger. The controlling includes modulating a working fluid control valve based on a determined target saturation temperature for the compressed working fluid. A refrigerant circuit includes a main flow path, a bypass flow path, a working fluid control valve, and a controller for the refrigerant circuit. The controller configured to determine a target saturation temperature for the working fluid flowing through the suction heat exchanger in the bypass flow path, and modulate the working fluid control valve based on the target saturation temperature.

COOLING SYSTEM FOR A HIGH-SPEED COMPRESSOR The invention relates to a cooling system for a high-speed compressor (60) comprising a refrigerant inlet and outlet, said system comprising: a network of circulating pipes for said refrigerant; a condenser (20) fluidly connected to said refrigerant outlet of said centrifugal compressor by said network of pipes; an evaporator (40) fluidly connected to said condenser by said network of pipes; said cooling system being characterized in that it further comprises a heat exchanger, referred to as a superheat exchanger (50) fluidly connected by said network of pipes to said evaporator on the one hand, and to said refrigerant inlet of the high-speed compressor (60) on the other hand, so as to ensure superheating of said refrigerant upstream of said high-speed compressor (60). Figure for the abstract: Figure 1

The invention discloses a chilled water heat exchange system and method.The system comprises a flash valve, a compressor, a first recovery device, a second recovery device and a third recovery device, the first recovery device, the second recovery device and the third recovery device are sequentially communicated and used for circulating chilled water, and the first recovery device comprises a first heat exchanger and a second heat exchanger which are arranged in parallel; the first recovery device comprises at least one heat utilization device with chilled water as a heat source, the second recovery device comprises at least one heat utilization device with chilled water as a heat source, the third recovery device comprises a third heat exchanger, and the first heat exchanger, the second heat exchanger, the third heat exchanger, the flash valve and the compressor are communicated in sequence to form a heat exchange loop for butene circulation, the butene is used to heat the chilled water flowing through the first heat exchanger and the second heat exchanger and to cool the chilled water flowing through the third heater. According to the application, effective utilization of low-grade heat energy of the quenched water can be realized.

This application provides a Stirling heat pump system and its control method, including a Stirling compressor and a gas handling device. The Stirling compressor has a cold end and a hot end capable of heat exchange with a working fluid. The gas handling device is disposed on the outer wall of the Stirling compressor and includes a cold-end heat exchanger capable of heat exchange with the cold end and a hot-end heat exchanger capable of heat exchange with the hot end. The gas first flows through the cold-end heat exchanger for cooling and dehumidification, and then flows through the hot-end heat exchanger for heating. The Stirling compressor provided in this application, combined with the gas handling device disposed on the outer wall of the Stirling compressor, enables the working fluid to absorb heat from the gas through the cold-end heat exchanger, causing the moisture in the gas to liquefy and condense, thereby achieving cooling and dehumidification. Simultaneously, the working fluid also releases heat to the gas through the hot-end heat exchanger, causing the gas to heat up, achieving high-temperature heating. That is, the Stirling heat pump system can simultaneously achieve both low-temperature dehumidification and high-temperature heating.

This invention discloses a refrigeration system and a refrigerator. The refrigeration system includes a compressor, a condenser, a throttling device, a gas-liquid separator, and a first evaporator. The compressor has an exhaust port, a first return port, and a second return port. The condenser is connected to the exhaust port, and the throttling device is connected to the outlet of the condenser. The gas-liquid separator includes a housing, an input pipe, a first output pipe, and a second output pipe. The input pipe is connected to the middle of the housing, with its outer end connected to the outlet of the throttling device and its inner end located within the inner cavity of the housing. The first output pipe is connected to the lower end of the housing and communicates with the inner cavity. The first evaporator is connected to the first output pipe and communicates with the first return port via a pipe. The second output pipe is connected to the upper end of the housing, with its lower end located within the inner cavity and offset from the inner end of the input pipe. The upper end of the second output pipe communicates with the second return port. By using a gas-liquid separator to separate liquid and gaseous refrigerant, the refrigeration capacity can be improved.

The heat exchanger is provided with a low-pressure flow channel and a high-pressure flow channel which do not communicate with each other, the low-pressure flow channel comprises a first branch flow channel, a second branch flow channel and a third branch flow channel, and one end of the first branch flow channel, one end of the second branch flow channel and one end of the third branch flow channel communicate with each other to form a confluence area; the low-pressure flow channel comprises a first low-pressure inlet, a second low-pressure inlet and a low-pressure outlet, the first low-pressure inlet, the second low-pressure inlet and the low-pressure outlet are communicated with the other ends of the first branch flow channel, the second branch flow channel and the third branch flow channel respectively, and at least one of the first branch flow channel and the second branch flow channel comprises a flow blocking flow channel section. When the flow blocking flow channel section is applied to the heat management system, the problem that refrigerants flow backwards in the heat management system can be solved, and the operation efficiency of the heat management system can be improved.

The invention provides a friction-free running all-solid-state magnetic refrigeration device which comprises at least one refrigeration unit, and the refrigeration unit comprises a plurality of refrigeration pieces and a plurality of heat return pieces which are vertically and alternately arranged; wherein the multiple heat regeneration pieces are positioned in the thickness direction in a spaced arrangement mode, and the interval size is larger than the thickness of the refrigeration piece; and one refrigeration sheet is accommodated in each interval. Wherein the refrigeration pieces do up-down reciprocating motion in the interval space of every two adjacent heat regeneration pieces in the vertical direction under the alternate leading action of magnetic attraction force and gravity, and in the moving process, each refrigeration piece and the two adjacent heat regeneration pieces conduct periodic heat conduction so as to achieve refrigeration. According to the design of the all-solid-state magnetic refrigeration device which does not slide in the tangential direction and can be separated in the normal direction, the problem that the service life is shortened due to surface abrasion of a refrigeration piece and a heat regeneration piece in a previously designed device is solved, and weakening of the refrigeration capacity of the device due to extra heat generated by friction is avoided.