334results about "Superheaters" patented technology

The invention discloses a pressure storage and heat storage coupled regenerative heat pump power storage system and a regulation and control method thereof. The system is composed of an electric-power generation integrated unit, an energy storage compression and energy release expansion integrated unit, an energy storage expansion and energy release compression integrated unit, a high-temperature heat exchanger, a backheating heat exchanger, a cold energy absorption heat exchanger, a heat storage and cold storage storage tank, a high-pressure gas storage tank and the like. And an energy storage / energy release loop, a heat storage / heat release loop, a cold storage / cold release loop and a pressure heat coupling loop are formed by connecting pipelines. In the energy storage mode, the compressor unit is driven by electric energy to conduct multi-stage compression, and compression heat and expansion cold are stored in the high-temperature storage tank and the low-temperature storage tank correspondingly. In the energy release mode, the heat storage medium and the cold storage medium are sequentially released to supply heat or cold to the circulating working medium, and the expansion unit is driven to drive the generator to generate electricity. According to the method, bidirectional operation of energy storage and energy release is achieved through valve switching and circulation control, and power output and load change are adjusted within a second level through a pressure-heat coupling mechanism.

The invention discloses a two-section compression type transcritical carbon dioxide heat pump system and a control method thereof. An outlet of a second compressor sequentially passes through a high-temperature heat exchanger and a flow divider and then is divided into two paths; wherein one path is communicated with an inlet of a first expansion machine through a heat flow stream inlet valve of the first heat regenerator, the hot side of the first heat regenerator and the hot side of the second heat regenerator, and the other path is communicated with an inlet of a second expansion machine through a heat flow stream inlet valve of the third heat regenerator and the hot side of the third heat regenerator in sequence; the outlet of the second expansion machine is communicated with the inlet of the mixer through the cold side of the second heat regenerator, the cold stream inlet valve of the first heat regenerator and the cold side of the second heat regenerator in sequence; an outlet of the first expansion machine communicates with an inlet of the mixer through the low-temperature heat exchanger, a cold stream inlet valve of the third heat regenerator, the cold side of the third heat regenerator and the first compressor, an outlet of the mixer communicates with an inlet of the second compressor, and the comprehensive energy efficiency of the carbon dioxide heat pump system can be improved.

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.

The application provides a single magnetic field operated high-efficiency regenerative full solid-state magnetic refrigeration device, which comprises at least one refrigeration unit, and the refrigeration unit comprises parallel arranged refrigeration layers and regenerative layers, wherein the refrigeration layer comprises a plurality of refrigeration pieces which are embedded in a first heat insulation material at intervals; the regenerative layer comprises a plurality of regenerative pieces which are embedded in a second heat insulation material, wherein refrigeration piece / regenerative piece=1, and the refrigeration unit is arranged so that the refrigeration layer and the regenerative layer make reciprocating translational motion respectively during operation, and the refrigeration pieces and the regenerative pieces have heat conduction therebetween. The magnetic refrigeration device of the application can operate under a single simple continuous magnetic field, the requirement for magnets is reduced, the device is more economical and environmentally friendly, and the device uses a plurality of regenerative pieces, the plurality of regenerative pieces simultaneously perform heat conduction at two motion terminals of cold and hot ends, the regenerative efficiency is greatly improved, and thus the regenerative factor and the refrigeration power density are improved.

The invention relates to the technical field of physical energy storage, and discloses a compressed carbon dioxide energy storage multi-combined supply system capable of continuously supplying cold and an operation method of the compressed carbon dioxide energy storage multi-combined supply system. In the carbon dioxide loop, the energy storage route comprises a low-pressure air bag, a first heat regenerator, a compressor, a cooler, a condenser and a high-pressure storage tank which are connected in sequence; the energy release route comprises a high-pressure storage tank, a second heat regenerator, a heater, a turbine, a radiator and a low-pressure air bag which are connected in sequence; the heat storage loop absorbs heat to the cooler through a heat storage medium and releases heat to the heater through the heat storage medium; and the refrigerating circuit releases heat to the first heat regenerator and the second heat regenerator through a refrigerating working medium. In the off-peak electricity period, waste heat of the refrigerating loop is used for increasing the temperature of carbon dioxide at an inlet of the compressor, and the heat storage temperature can be increased; in the peak electricity period, waste heat of the refrigerating loop is used for meeting heat needed in the carbon dioxide gasification process, and consumption of the heat storage loop is reduced.

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 application discloses a carbon dioxide refrigeration heat pump system and a composite control method of the carbon dioxide refrigeration heat pump system. The carbon dioxide refrigeration heat pump system comprises a first compressor, a second compressor, a third compressor, a water cooler, a first regenerator, a first throttling valve, a flash tank, a second throttling valve, an evaporator, a liquid storage barrel, a flash bypass valve and a second regenerator which are connected and matched with each other. The carbon dioxide refrigeration heat pump system and the composite control method have the advantages that the design is scientific, the working condition of the carbon dioxide refrigeration heat pump system can be accurately controlled, the control precision is improved, the working condition energy efficiency is obviously improved, the operation efficiency of the working condition is ensured, and the application has great practical significance. The composite control method of the carbon dioxide refrigeration heat pump system specially designed by the application is a dimension reduction decoupling control method for coping with the operation of a complex system with variable working conditions.

The invention belongs to the related technical field of refrigerating and heating equipment, and discloses a carbon dioxide air conditioner heat pump system integrated with a multi-way valve, which comprises the multi-way valve, an ejector, a first indoor heat exchanger, a second indoor heat exchanger, a gas-liquid separator, an outdoor heat exchanger, a compressor, a throttle valve and a four-way reversing valve, four valve ports of the four-way reversing valve are respectively connected to an inlet of the outdoor heat exchanger, an exhaust port of the compressor, an outlet of the throttle valve and an inlet of the second indoor heat exchanger; a gas outlet of the gas-liquid separator is connected to a gas suction port of the compressor; the multi-way valve is an eight-way valve and is provided with eight connectors which are connected with the ejector, the gas-liquid separator, the first indoor heat exchanger, the outdoor heat exchanger and the second indoor heat exchanger correspondingly, the communication state between the connectors of the multi-way valve is changed by adjusting a valve element of the multi-way valve, and the flow direction of refrigerants is changed. Therefore, the system can be switched between a refrigerating mode and a heating mode. According to the invention, the complexity and cost of the system are reduced.

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 application provides a heat pump unit and a control method and a storage medium thereof. The method is applied to the field of heat pumps. The heat pump unit comprises a gas-liquid separator, a first evaporator, a second evaporator, an ejector, a four-way valve, a regenerator, an air cooler, a first valve body and a second valve body. The method comprises the following steps: obtaining an operation mode of the heat pump unit; if the operation mode is a defrosting mode, controlling the first valve body to be closed, the second valve body to be opened, and the refrigerant heated by the regenerator to be transported to the gas-liquid separator through the ejector, the four-way valve and the second evaporator. The problem that the high-low pressure difference on both sides of the four-way valve is large, resulting in the failure of the four-way valve adjustment, is avoided during defrosting.

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 utility model relates to a low-temperature unit, which comprises an absorption type unit and a compressor unit, the compressor unit at least comprises a compressor, a siphon type evaporator and a throttling component, the siphon type evaporator comprises a gas-liquid separator and an evaporator which are communicated through a pipeline, and the gas-liquid separator is positioned above the evaporator. The compressor, a heat exchange pipeline of the absorption type unit, the throttling component and the siphon type evaporator are sequentially communicated through pipelines to form a main circulation loop of refrigerants so as to prepare low-temperature chilled water. After refrigerant liquid is throttled, one part of liquid refrigerant is flashed into gaseous refrigerant and gas-liquid refrigerant enters the gas-liquid separator, the gas-liquid separator is located above the evaporator and supplies liquid to the evaporator by means of gravity, and the liquid refrigerant absorbs heat of chilled water in the evaporator and is partially gasified, so that liquid at an inlet and an outlet of the evaporator generates density difference; the mass flow rate and the circulation ratio of the refrigerant in the tube pass of the evaporator are improved, the heat exchange efficiency of the refrigerant in the siphon evaporator is improved, and chilled water with the temperature below-30 DEG C is prepared.

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.

The embodiment of the invention provides a heat recovery system based on a subcooler and an air conditioner and hot water all-in-one machine. The heat recovery system comprises a compression module, a first heat exchanger, the subcooler, a second heat exchanger and a water tank. The first heat exchanger, the subcooler and the second heat exchanger are sequentially connected in series. The compression module is connected to the first heat exchanger and the second heat exchanger. The water tank is connected to the subcooler, and the subcooler exchanges heat with the refrigerant condensed by the first heat exchanger or the second heat exchanger so as to transfer heat to the water tank. The first heat exchanger, the subcooler and the second heat exchanger are sequentially connected in series, so that the first heat exchanger serves as a condenser and the second heat exchanger serves as an evaporator in the refrigerating process, the second heat exchanger serves as a condenser and the first heat exchanger serves as an evaporator in the heating process, and separation of the condenser and the subcooler is achieved; the energy efficiency ratio of the system is improved; the subcooler is connected with the water tank, so that integration of an air conditioner and a hot water system is achieved, and the multiple requirements of users for refrigeration, heating and hot water supply are met.

The utility model relates to the related technical field of barrel type economizers, in particular to an adjustable flow control device of a barrel type economizer, which comprises a flow control device, an adjusting mechanism and a sealing mechanism are arranged in the flow control device, the flow control device comprises a pipeline, a display and a detector, and the pipeline is connected with the display and the detector. A display is arranged at one end of the pipeline, and a detector is arranged at one end of the pipeline. According to the adjustable flow control device of the barrel type economizer, through the arrangement of the first valve, the ball valve, the second valve and the flow adjusting plate and the rotary structural design of the first valve and the ball valve, flow adjustment is more flexible and convenient, the size of the flow adjusting plate is matched with the inner wall of the ball valve, the smoothness of fluid passing is guaranteed, fluid resistance is reduced, and the service life of the flow adjusting plate is prolonged. And due to the arrangement of the second valve, the accuracy and reliability of flow control are further improved, the simplicity and convenience of operation are ensured, and the stability and efficiency of the system are improved.

A thermodynamic system 1 for cooling or heating at least a first container 11 containing food products of the liquid or semi-liquid type, comprising a circuit employing a heat exchanger fluid, preferably transcritical, having at least: - a compressor 2 provided with a first inlet "I1" and a first outlet "U1" for the heat exchanger fluid and with a second inlet "I2" and a second outlet "U2" for said heat exchanger fluid; - a first heat exchanger 4 comprising an inlet 4a for the heat exchanger fluid, connected to the second outlet "U2" of the compressor 2, and an outlet 4b for the heat exchanger fluid, the first heat exchanger 4 further comprising an inlet 4c for the service fluid and an outlet 4d for the service fluid; - a second heat exchanger 5 associated with at least a first container 11; - an inlet branch 35 for the heat exchanger fluid, extending from the outlet 4b for the heat exchanger fluid of the first heat exchanger 4 to an inlet 5a of the second heat exchanger 5; - an outlet branch 36 for the heat exchanger fluid, extending from the outlet 5b of the second heat exchanger 5 to the first inlet "I1" of the compressor 2; - a control and drive unit 8;

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 invention discloses an energy storage type heat pump-heat and power cogeneration system, and belongs to the technical field of energy storage. Comprising a heat pump cycle, a power generation cycle and a storage tank, and when electric energy is sufficient, the system operates in a reverse Rankine cycle heat pump mode; when the electric energy is in shortage, the system operates in a forward circulation discharge mode. According to the system, high electricity-electricity conversion efficiency can be achieved, residual energy can be converted into heat to be stored to achieve heat supply, and therefore ultrahigh energy utilization efficiency is achieved.

The present invention discloses a sub-Kelvin temperature range refrigeration mechanism, comprising a pulse tube refrigeration unit, a first pre-cooling heat exchanger, a throttling refrigeration unit, a second pre-cooling heat exchanger, an adsorption refrigeration unit, a third pre-cooling heat exchanger, and a dilution refrigeration unit. The pulse tube refrigeration unit includes a pulse tube refrigeration unit, which is connected to the throttling refrigeration unit via the first pre-cooling heat exchanger to pre-cool the throttling refrigeration unit. The throttling refrigeration unit includes a throttling refrigeration unit, which is connected to the adsorption refrigeration unit via the second pre-cooling heat exchanger to pre-cool the adsorption refrigeration unit. The adsorption refrigeration unit includes an adsorption refrigeration unit, which is connected to the dilution refrigeration unit via the third pre-cooling heat exchanger to pre-cool the dilution refrigeration unit. The dilution refrigeration unit includes a dilution refrigeration unit, which serves as the refrigeration terminal of the sub-Kelvin temperature range refrigeration mechanism. Compared to the prior art, the refrigeration mechanism of the present invention can achieve lower cooling temperatures and greater cooling capacity.

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.