83 results about "Effects heat" patented technology

The invention discloses a waste alkali liquor incineration treatment and energy recovery system for a propylene epoxidation device, and belongs to the field of energy conservation and environmental protection. Sodium salt in a molten state formed in the incineration process is fully cooled and dried into a solid state through a cold fluid mixing and membrane wall heat transfer coupling cooling technology, solid alkaline residues and alkaline ash formed in the cooling process are captured and conveyed in a closed mode through a sodium salt dispersing and collecting method, energy recovery of incineration heat release is achieved through a multi-effect heat exchange network, and the energy recovery efficiency is improved. By means of the system and method, up-to-standard emission of smoke generated in the incineration process is achieved.

The invention provides a conjugated frame encapsulated graphene functionalized polymer anti-corrosion anti-impact double-effect heat-conducting coating and a preparation method thereof, the method comprises the following steps: step S1, mixing graphene with a bromine source to prepare brominated graphene; step S2, adding a halogen monomer, a conjugated alkyne monomer, a catalyst and the brominated graphene obtained in the step S1 into a mixed solution, and inducing a conjugated frame to perform in-situ packaging on the surface of the graphene in an inert gas atmosphere to prepare conjugated frame packaged graphene; s3, performing high-temperature carbonization treatment on the conjugated frame packaged graphene obtained in the step S2, and permeating a corrosion-resistant matrix to prepare a conjugated frame packaged graphene functional polymer; and step S4, loading a heat conduction material and a thickening agent on the graphene functionalized polymer obtained in the step S3 to prepare the graphene functionalized polymer coating. The coating prepared by the invention has the characteristics of continuous conjugate frame, hierarchical pore structure and corrosion resistance and impact resistance, and is suitable for the field of protection of efficient heat exchange equipment.

The invention provides an ultra-clean converter one-time dry dust removal method which comprises the following steps: S1, constructing an ultra-clean converter one-time dry dust removal system which comprises a high-effect heat exchanger, a banana bend separator, a rotational flow heat recovery device, a water-cooling chain conveyor, an electrostatic dust collector, a high-temperature-resistant explosion-proof ultra-clean dust collector, a cooling replacement fan, a coal gas axial flow fan and a coal gas washing dehydrator; s2, purification; S3, recovery: passing the qualified coal gas through a recovery cup valve and then conveying the qualified coal gas to a coal gas cabinet; and S4, unqualified coal gas passes through a diffusion cup valve and then is sent to a diffusion chimney for ignition and diffusion. A converter gas waste heat recovery process is adopted, and meanwhile, an ultra-clean dust remover process is adopted, so that the concentration of an outlet of a dust remover can be stably maintained below 5mg / Nm < 3 >.

The invention belongs to the technical field of heat pump rectification, and particularly relates to a double-effect heat pump rectification system which comprises a first-effect rectification tower feeding pump connected with a preheater, the preheater is connected with a first-effect rectification tower, the first-effect rectification tower is connected with a gas-liquid separator through a screw compressor, and the gas-liquid separator is connected with a tail gas condenser through a second-effect falling film reboiler. The second-effect falling film reboiler is connected with a first-effect reflux discharge pump through a first-effect reflux tank, and the first-effect reflux discharge pump is connected with the preheater; the first-effect rectifying tower is respectively connected with a first-effect falling film reboiler and a first-effect falling film circulating pump; the first-effect rectifying tower is connected with a second-effect rectifying tower through a first-effect tower kettle discharging pump; the first-effect falling film reboiler is connected with a second-effect reflux discharge pump through a second-effect reflux tank; the second-effect falling film reboiler is connected with a second-effect falling film circulating pump and a second-effect rectifying tower, the second-effect falling film reboiler is connected with a second-effect rectifying tower kettle discharging pump through the second-effect rectifying tower, and the second-effect rectifying tower is connected with the first-effect falling film reboiler. According to the invention, double-effect rectification and heat pump rectification are successfully combined, and the cost is low.

The invention relates to a third-generation converter gas dry dust removal system which comprises a high-effect heat exchanger, a banana bend dust remover, a rotational flow heat recovery device, a water cooling roller, a raw gas pipe, a high-temperature-resistant explosion-proof ultra-clean dust remover, a fine ash bin, a clean gas pipe, a gas axial flow fan and a gas cooling dehydrator. A banana bend dust remover is arranged between the high-effect heat exchanger and the rotational flow heat recovery device, and the rotational flow heat recovery device is connected with the high-temperature-resistant explosion-proof ultra-clean dust remover through a raw gas pipe. A clean gas pipe is arranged at an outlet of the high-temperature-resistant explosion-proof ultra-clean dust remover, clean gas is conveyed to a gas switching station through a gas axial flow fan, and the gas which is detected to be qualified is conveyed to a gas cabinet after being washed and cooled through a gas cooling dehydrator; unqualified coal gas is sent to a diffusion chimney to be ignited and diffused. The problem that high-quality heat is not recycled is solved, the problem that a dry dust removal system is prone to explosion venting is also solved, and the application prospect is wide.

The utility model relates to the technical field of air conditioners, and discloses a fresh air reheating dehumidification air conditioning system. The four-way valve assembly comprises a system four-way valve and a reheating four-way valve, the system four-way valve is arranged on the first exhaust branch and communicated with the first air suction branch, and the reheating four-way valve is arranged on the second exhaust branch and communicated with the second air suction branch; the outdoor heat exchanger is communicated with the system four-way valve; the indoor heat exchange assembly comprises a dehumidification heat exchanger and a reheating heat exchanger, one end of the dehumidification heat exchanger communicates with the outdoor heat exchanger, the other end of the dehumidification heat exchanger communicates with the system four-way valve, one end of the reheating heat exchanger communicates with the reheating four-way valve, and the other end of the reheating heat exchanger communicates with the dehumidification heat exchanger. The reheating dehumidification fresh air conditioning system further comprises a full-effect heat exchanger, so that indoor inlet air flows through the full-effect heat exchanger to become fresh air, and then flows through the indoor heat exchange assembly. According to the fresh air reheating dehumidification air conditioning system, constant-temperature dehumidification of fresh air is achieved.

The utility model discloses an auxiliary cooling type transformer iron core, which relates to the technical field of transformer iron cores, and comprises a positioning frame, a plurality of groups of silicon steel inserts and partition plates, a plurality of groups of silicon steel inserts are arranged on one side of the positioning frame, the partition plates are arranged on one sides of the silicon steel inserts, a positioning mechanism is arranged on the outer side of the positioning frame, and the positioning mechanism is arranged on the outer side of the positioning frame. The positioning mechanism is used for fastening the multiple sets of silicon steel inserting pieces and the positioning frame so that the silicon steel inserting pieces can be conveniently separated and assembled, the heat dissipation mechanism is arranged on the outer side of the separation plate piece, the heat dissipation mechanism accelerates air flow near the silicon steel inserting pieces, the heat exchange efficiency of the heat dissipation pieces is improved, and the heat dissipation effect is enhanced. In the using process, the two sets of silicon steel inserting pieces are separated through the partition plate arranged in the middle, and then the situation that in the running process of the multiple sets of silicon steel inserting pieces, heat is accumulated in the middle, and then the heat cannot be effectively dissipated is avoided.

The utility model relates to a multistage flash evaporation and vacuum low-temperature negative-pressure black liquor concentration system based on industrial waste heat, which belongs to the technical field of flash evaporation and comprises at least one heat exchange unit and at least two flash evaporation units sequentially connected in series. The concentration medium outlet of the flash evaporation unit located at the last effect is communicated with the concentration medium inlet of the heat exchange unit equivalent to the flash evaporation unit of the last effect located at the last effect, and when the number of the heat exchange units is at least two, the heat exchange units are sequentially connected in series. The flash evaporation unit located at the first effect communicates with the heat exchange unit equivalent to the flash evaporation unit located at the first effect through a heating unit. The concentration medium generated by the last-effect flash evaporation unit flows back to the previous-effect heat exchange unit to serve as a heat source, energy recycling is achieved, the requirement for external heat input is reduced, and therefore the energy efficiency of the whole system is improved; the plurality of heat exchange units which are sequentially connected in series can more effectively utilize temperature gradient to transfer heat, so that the heat can be more uniformly transferred to each flash evaporation unit, and the heat transfer effect is enhanced.

The invention relates to a heating device (40) for heating a gas flow, comprising a heating element (1) adapted to effect heat exchange with the gas flow, in which the heating element (1) comprises at least one resistive element (10) comprising a plate-shaped base body (20) comprising first and second opposing surfaces (21, 22) connected by third and fourth opposing surfaces (23, 24), wherein the heating element (1) is connectable to a power source such that the heating element (1) can be heated by resistive heating. Since the resistive element (10) comprises at least one projection (30) projecting from the first and / or second surface (21, 22) of the base body (20), improved heat transfer properties and increased service life of the heating device (40) are achieved.

The invention relates to the technical field of waste heat recovery of Bayer process aluminum oxide production, in particular to a seven-effect five-flash condensate water waste heat grading system and an aluminum oxide production device. According to the system, the first-effect condensate water and the second-effect condensate water are divided into two independent loops according to the thought of'temperature alignment and stepped recovery ', namely the first-effect condensate water and the second-effect condensate water, and the condensate water cooled by the two loops finally converges into the same recovery tank and then is pumped back to a boiler or a deaerator. Due to the fact that heat needed by the stock solution, the washing water and the secondary steam condensate water is all borne by original directly-discharged first-effect waste heat and second-effect waste heat, the amount of new steam needing to be supplemented by the evaporator is correspondingly reduced. And meanwhile, the first-effect heat transfer temperature difference of the evaporator is reduced, the system can maintain the seven-effect total temperature difference under the lower new steam pressure, and closed-loop energy saving of replacing new steam with waste heat is achieved.

The utility model relates to the technical field of cement production, and discloses a ground cement cooling device of a cement grinding mill. The ground cement cooling device of the cement grinding mill comprises a bottom plate, a supporting rod is fixedly installed above the bottom plate, a limiting pipe is fixedly installed above the supporting rod, a feeding port is fixedly formed in the upper portion of the limiting pipe, a limiting frame is fixedly installed at the left end of the limiting pipe, a driving pipe is movably installed in the center of the limiting pipe, and the driving pipe is fixedly installed at the left end of the limiting pipe. The heat conduction area between the heat pipe and air flow can be increased through the heat dissipation fins, the air flow is generated between the heat dissipation fins through the fans on the front side and the rear side, heat of the heat pipe is taken away through the air flow, and therefore water in the water tank can be rapidly cooled; the temperature difference between the cement and the circulating water is too small, so that the heat conduction efficiency is influenced, and the cooling effect is influenced, which are caused by too high temperature of the circulating water discharged out of the water tank due to long-time operation, is avoided.

The invention provides a vehicle-mounted air conditioning system and an automobile, and the vehicle-mounted air conditioning system comprises an air conditioning module with a double-effect heat exchanger; a first valve port of the four-way reversing valve is connected with the double-effect heat exchanger; the first end of a first heat exchange runner of the first heat exchanger is connected with a second valve port of the four-way reversing valve, and the second end is connected in series with the first regulating valve and connected with the double-effect heat exchanger; the second heat exchange runner is sequentially connected in series with the second three-way node, the motor, the third heat exchanger, the second three-way valve and the first booster pump and returns to the first heat exchanger; the first end of a third heat exchange runner of the second heat exchanger is connected with a third valve port through a one-way valve and connected to a fourth valve port in series with a gas-liquid separator and a compressor, and the second end of the second heat exchanger is sequentially connected with a second regulating valve and the second end of the first heat exchange runner; the fourth heat exchange runner is sequentially connected with a four-way water valve, a second booster pump and a battery in series and returns to the second heat exchanger. The number of cores in the air conditioner module can be reduced.

The invention relates to the technical field of heat pump / refrigeration and low-temperature waste heat utilization, in particular to a composite absorption heat pump combining a first-class double-effect heat pump and a second-class heat pump. The composite absorption heat pump combining the first-class double-effect heat pump and the second-class heat pump comprises a first-class double-effect heat pump unit and a second-class heat pump unit which are both connected with a steam-water separator; the medium-temperature heat source is connected between the first evaporator and the first generator; the second absorber is communicated with the shell side of the first generator; the first absorber heat transfer tube bundle is communicated with the shell of the steam-water separator; the heat transfer tube bundle of the high-pressure generator is communicated with the shell of the steam-water separator; a steam outlet of the steam-water separator is communicated with an external user; the first refrigerant pump is connected between the first condenser and the first evaporator. Through multi-stage absorption heat exchange of a lithium bromide solution-water working medium pair, a low-grade medium-temperature heat source is utilized in a gradient mode, all heat of the medium-temperature heat source is used for heating a low-temperature heat source to a high temperature, a steam-water separator is combined, part of high-grade steam can be generated, and one machine has two purposes.

This invention discloses an adaptive control system for a triple-effect heat recovery flue gas desulfurization unit. This invention relates to the field of heat energy recovery technology and solves the problem of excessive heat waste caused by the lack of analysis of different heat transfer loss scenarios. This invention collects and analyzes past parameters generated by the corresponding heat exchanger. Based on the analysis results, it identifies corresponding parameter packages, each with an optimal point corresponding to a specified optimal heat energy parameter. Subsequently, based on the corresponding demand parameters, it identifies the range to which such demand parameters belong and selects the corresponding optimal heat energy conversion value. Then, based on the optimal heat energy conversion value, it performs heat energy allocation to minimize heat loss, ensuring full utilization of waste heat and improving the overall waste heat recovery and utilization rate.

The utility model relates to the technical field of engine parts, in particular to a cylinder head heat dissipation structure which comprises a double-powerful-effect heat dissipation assembly, the double-powerful-effect heat dissipation assembly comprises a heat dissipation channel, an installation ring, an installation frame, heat dissipation fins and a fixing frame, the installation ring is fixedly connected with the heat dissipation channel and located above the heat dissipation channel, and the installation frame is fixedly connected with the installation ring and located above the heat dissipation channel. The mounting frame is fixedly connected with the heat dissipation channel and located above the center of the heat dissipation channel, the heat dissipation fins are detachably connected with the mounting ring and located below the mounting ring, and the fixing frame is fixedly connected with the mounting ring and located above one side of the mounting ring. Therefore, the original beneficial effects are kept, and meanwhile the problems that heat accumulation is caused by the fact that a traditional cylinder head heat dissipation mode is not high enough in heat dissipation efficiency and unreasonable in heat dissipation structure design, and the heat dissipation performance of the cylinder head cannot provide effective heat dissipation for an engine along with continuous improvement of the power density of the engine are actively and effectively solved.

This invention discloses a dual-source, low-dew-point, closed-loop water-cooled double-effect heat recovery unit and its control method. The unit includes: a main circuit, a first heat exchanger, a first three-way valve, a second three-way valve, a humidifier, a control module, and a second heat exchanger. The main circuit includes a compressor, a four-way valve, a water-cooled heat exchanger, a throttling structure, and an evaporator connected in sequence. The control module determines the operating mode based on environmental information and regulates the main circuit, the humidifier, the first three-way valve, the second three-way valve, the first heat exchanger, and the second heat exchanger. Utilizing externally input chilled water, the system adjusts the temperature of the air output from the third chamber at the air outlet while simultaneously adjusting the return temperature of the chilled water and outputting treated chilled water back to the outside. This satisfies the varying indoor heat load requirements due to different air supply temperature differences, achieving double-effect heat recovery and solving the problem of high energy consumption and large electric reheat requirements in dual-source, low-dew-point applications, making the unit more efficient, stable, and simple.

In a refrigeration apparatus, an outdoor unit includes a first refrigeration cycle which includes a compressor and in which a first working medium circulates. An indoor unit includes at least an indoor heat exchanger and second piping of a second refrigeration cycle which includes a refrigerant pump and in which a second working medium circulates. A relay unit independent of the outdoor unit and the indoor unit includes at least the refrigerant pump and a relay heat exchanger located between the refrigeration cycles to effect heat exchange between the refrigeration cycles. At least a flammable refrigerant is used as a refrigerant component of the first working medium, and at least a fluoroolefin is used as a refrigerant component of the second working medium.

The present application belongs to the field of chemical industry, and particularly relates to a method for inhibiting the scaling of a first effect heat exchanger in the evaporation and concentration process of sulfuric acid method titanium dioxide waste acid. The titanium dioxide waste acid is sent into a multi-effect evaporation and concentration system, and the feature is that only the circulating acid returned from the first effect concentration is sent into the first effect heat exchanger for heating, and the feeding position of fresh titanium dioxide waste acid is set at the rear end of the first effect heat exchanger outlet, so as to avoid the mixing of the circulating acid and the fresh titanium dioxide waste acid and then entering the first effect heat exchanger. The fresh titanium dioxide waste acid is mixed with the circulating acid flowing out of the heat exchanger after being heated, and the mixed acid is sent into an evaporation chamber for evaporation and concentration. The feeding temperature of the fresh titanium dioxide waste acid mixed with the circulating acid is 10-110 DEG C.

The utility model relates to a lithium bromide absorption unit of double-effect refrigeration and single-effect heating, which is based on a steam double-effect lithium bromide absorption water chiller with solution parallel circulation, a heat pump generator is additionally arranged in the low-pressure generator and the condenser cylinder, the heat pump generator is arranged between the low-pressure generator and the condenser, a condensate heat exchanger for the heat pump is separately arranged, and switching and adjusting valves are additionally arranged between the pipelines connecting the components. Through the switching and adjusting of the valves, the double-effect refrigeration cycle and the single-effect heating cycle can be safely, stably and reliably operated on the same unit, the initial investment of the equipment is reduced, the management cost of the equipment is saved, the land occupation of the equipment is saved, the annual operation rate of the unit is improved, the unit has wider adaptability and can be designed in a large size. The unit can meet the air conditioning and production process use through double-effect refrigeration in summer and can recover waste heat for heating through single-effect heat pump in winter, is very energy-saving and environment-friendly, and has very good economic and social benefits.

The utility model relates to the technical field of air energy heat pumps, and discloses an anti-freezing air energy heat pump which comprises a refrigerant pipe located on a heat exchanger, moving rings are rotatably connected to the positions, close to the two ends, of the refrigerant pipe respectively, a plurality of fan blades are connected to the peripheries of the moving rings respectively, and a first annular cavity is connected to the interior of each moving ring. A brush plate is connected between the opposite movable rings, a plurality of bristles are connected to the side, close to the refrigerant pipe, of the brush plate, the bristles abut against the refrigerant pipe, and a ventilation assembly capable of spraying air to the outer wall of the refrigerant pipe is connected to the brush plate. Compared with the prior art, the utility model has the advantages that the direct contact between air and the refrigerant pipe is facilitated to avoid the influence on heat absorption, the surface of the refrigerant pipe is conveniently and automatically brushed by the bristles to prevent icing, and efficient preheating and deicing are facilitated.

An integrated linear generator system includes, for example, a generator assembly, a control system, a frame system, an exhaust system, an intake system, a cooling system, a bearing system, one or more auxiliary systems, or a combination thereof. The generator system is configured to generate power, as controlled by the control system. The generator assembly may include an opposed- and free-piston linear generator, configured to operate on a two-stroke cycle. The intake and exhaust systems are configured to provide reactants to and remove products from the generator assembly, respectively. The cooling system is configured to effect heat transfer, material temperature, or both, of components of the integrated linear generator system. The bearing system is configured to constrain the off-axis motion of translators of the generator assembly without applying significant friction forces. The frame system is configured to manage rigidity, flexibility, and alignment of components of the integrated linear generator system.

This utility model relates to the technical field of waste heat recovery devices, and discloses a high-efficiency industrial pipeline waste heat recovery device, including a waste heat recovery machine. Both ends of the waste heat recovery machine are fixedly connected to connecting pipes. A waste heat recovery pipe is fixedly connected inside the waste heat recovery machine. A cleaning component is installed inside the waste heat recovery machine. A maintenance cover is slidably connected inside the waste heat recovery machine. A disassembly and assembly component is installed inside the maintenance cover. The cleaning component includes an air pipe and a nozzle. The outer wall of the air pipe is fixedly connected inside the waste heat recovery machine, and one end of the air pipe is fixedly connected to one end of the nozzle. In this utility model, the motor drives the rotating rod and slip ring, and in conjunction with the swing rod, the nozzle swings inside the waste heat recovery machine, thereby conveniently and thoroughly cleaning the internal waste heat recovery pipe, keeping the interior clean, solving the problem of excessive dust on the pipe surface affecting heat transfer, and improving the efficiency of heat transfer.

The invention relates to the field of aero-engine heat transfer and mass transfer analysis, and discloses a method and a system for processing cooling effect heat exchange experimental data under a curved surface structure of an aero-engine. The method comprises the following steps: expanding a whole curved surface cloud picture into a two-dimensional image containing real arc length coordinate points, reconstructing the expanded two-dimensional image into a grid matrix, performing identification assignment operation on the grid matrix by using a respe function, and accurately mapping physical quantity data to corresponding positions of the grid matrix, thereby forming a two-dimensional image type grid cloud picture. According to the method, data are displayed in a more intuitive and ordered manner, a polygonal region is drawn to select an invalid data range, and a createMask function is used to generate a binary mask region, so that the range of invalid data is clearly identified, corresponding physical quantity data is marked as invalid data, and interference is eliminated for subsequent deep analysis of valid data.

The utility model relates to the technical field of heat collecting tubes, and provides a nano-molecule-level special-effect heat collecting tube which comprises a vacuum glass outer tube and a nano-molecule composite layer, the inner wall of the vacuum glass outer tube is fixedly connected with a hardening layer, the inner wall of the hardening layer is fixedly connected with an anti-reflection layer, the inner wall of the anti-reflection layer is fixedly connected with the nano-molecule composite layer, and the nano-molecule composite layer is fixedly connected with the nano-molecule composite layer. Internal elements can be protected through the vacuum glass outer tube, the purpose of light condensation can be achieved, the toughness of the device can be improved through the hardening layer, the situation that the device bursts due to the fact that the device cannot bear heat and cold alternation is avoided, sunlight can be prevented from being reflected through the anti-reflection layer, the hardness of the device can be improved through the nano-molecule composite layer, and the service life of the device is prolonged. And meanwhile, the heating speed of the device can be increased. By means of the technical scheme, the problems that in the prior art, an existing heat collecting pipe is poor in heat collecting efficiency, long-time heating is needed, and the practicability of the device is reduced are solved.

The utility model discloses a piece alkali concentration two -effect two -time steam recycling system, and two -effect heat exchanger's material inlet communicates with material input pipeline, and two -effect heat exchanger's material outlet communicates with two -effect evaporation chamber's material inlet, and two -effect evaporation chamber's material outlet communicates with the material inlet of final heat exchanger, and the material outlet of final heat exchanger communicates with the material inlet of final evaporation chamber, and the material outlet of final evaporation chamber communicates with the inlet of flash tank, and the steam outlet of final evaporation chamber communicates with the steam inlet of two -effect heat exchanger, and the steam outlet of two -effect heat exchanger communicates with the hot medium inlet of surface condenser, and the hot medium outlet of surface condenser communicates with the inlet pipeline of condensate recovery tank, and the water outlet of sewage adjusting pool is connected with the inlet pipeline of self -induction jar, and the outlet of self -induction jar communicates with the cold medium inlet pipeline of surface condenser through circulating pump, and the cold medium outlet of surface condenser is connected with the inlet pipeline of radiator, and the radiator is placed in sewage adjusting pool.

The invention relates to the technical field of thermal resistors, and discloses a multi-point thermal resistor based on an air floatation support heat dissipation structure, which comprises a junction box, the junction box is detachably provided with an insulation framework through an upper connecting pipe arranged at the bottom of the junction box, and the bottom of the insulation framework is fixedly connected with a resistor body. The outer surface of the circumference of the upper connecting pipe is in threaded connection with a protection pipe used for protecting the resistor body, and an air floating piece used for supporting the resistor body is arranged in the protection pipe. The multi-point type thermal resistor based on the air floatation supporting heat dissipation structure can effectively solve the problems that in the prior art, a mechanical supporting structure can hinder full contact between a temperature sensing element and a measured medium, the heat transfer speed is affected, and in the long-term use process of the thermal resistor, due to friction and vibration effects between the thermal resistor and a measured object, the thermal resistor is prone to damage. And mechanical wear is easy to generate, so that the supporting structure is loosened or damaged, and the normal work of the thermal resistor is influenced.

The invention relates to a temperature control device (120) for an analytical device for analyzing a sample contained in a microfluidic cartridge (105). The temperature control device (120) comprises a supply device (240) designed to alternately supply a hydraulic working medium at a first working temperature (T1) or a second working temperature (T2) different from the first working temperature (T1). The temperature control device (120) further comprises a heat transfer device (230) fluidically connected to the supply device (240). The working medium can flow through the heat transfer device (230) and, when the microfluidic cartridge (105) is coupled to the analytical device, is thermally coupled to a section (207) of the microfluidic cartridge (105) to be temperature-controlled.The heat transfer device (230) is designed to effect heat transfer between the working medium and the section (207) of the microfluidic cartridge (105) to be tempered.

The outdoor heat exchanger (13) has a liquid-side header (52) and heat transfer tubes (53). The liquid-side header (52) guides the refrigerant. The heat transfer tubes (53) are connected to the liquid-side header (52) to effect heat exchange between the refrigerant and the medium. The liquid-side header (52) has an inner plate (62), an inner plate (63), and an outer plate (61). The inner plate (62) has a surface (622). The inner plate (63) has a surface (631) opposed to the surface (622). The outer plate (61) has a surface (614). The surface (614) intersects the surface (622) and the surface (631) and joins the inner plate (62) and the inner plate (63). The surface (622) and the surface (631) are joined by solder having a first thickness. The surface (614) and the inner plate (62) are joined by solder having a second thickness. The surface (614) and the inner plate (63) are joined by solder having a third thickness. The first thickness is smaller than the second thickness. The first thickness is smaller than the third thickness. The first thickness is 0.2 mm or less.

A refrigeration apparatus includes a first heat exchanger, a compressor, and an expansion valve that are located in an outdoor space and connected to first piping that allows a first working medium to circulate through the first heat exchanger, the compressor, and the expansion valve (outdoor-side circuit). The refrigeration apparatus includes a second heat exchanger located in an indoor space and connected to second piping that allows a second working medium to circulate through the second heat exchanger (indoor-side circuit). The refrigeration apparatus further includes a secondary heat exchanger located between the first piping and the second piping and in the outdoor space to effect heat exchange between the first working medium and the second working medium. The first working medium contains at least a fluoroolefin, and the second working medium contains no fluoroolefin.

An indoor unit (1), in particular for a split heat pump, comprises: a housing (2) defining a housing compartment (3) inside; a fluid circuit (6); a refrigerant circuit (4); and a heat exchanger (5) in which the refrigerant circuit extends between two end bodies (7) configured to convey refrigerant through the heat exchanger to effect heat exchange with a fluid, in which each end body comprises a shut-off valve (8) designed to interrupt a flow of refrigerant circulating through the end body, in which the shut-off valve (8) is configured to shut off the flow of refrigerant circulating through the end body, and in which the shut-off valve (8) is configured to shut off the flow of refrigerant circulating through the end body. Each shut-off valve comprises an interruption cavity (9) and an interruption member configured to interrupt refrigerant circulating through the shut-off cavity (9), where each shut-off valve comprises an end conduit (10), where the end conduit is shaped to enable a fluid tight connection between the shut-off cavity and an external refrigerant circuit (19) and is formed as a single piece with the shut-off cavity.