1074results about "Ice removal" patented technology

A three-way heat exchanger includes panel assemblies arranged in series. Each panel assembly includes a frame defining a heat transfer fluid channel and a vapor-permeable membrane positioned on the frame to define a desiccant channel separated from the heat transfer fluid channel. The three-way heat exchanger also includes clamping assemblies for exerting a clamping force on the panel assemblies. Each clamping assembly includes a tie rod extending through the frames of the panel assemblies and including opposite ends, retainers connected to the opposite ends of the tie rod, and a resilient element positioned between one of the retainers and one of the panel assemblies at one of the ends of the tie rod. The resilient element is deformable to accommodate size variations of the panel assemblies.

The invention relates to the technical field of finned heat exchangers, and discloses an adjustable finned heat exchanger which comprises a shell, air passing openings are formed in the two sides of the shell, a plurality of heat exchange modules used for heat transfer are arranged in the shell, the heat exchange module located in the middle is fixed to the shell, and the air passing openings are formed in the air passing openings. The other heat exchange modules are slidably connected with the shell through guide mechanisms, the distance between the heat exchange modules can be adjusted through adjusting mechanisms, the heat exchange modules are communicated through second corrugated pipes, and fans are fixed to the inner sides of the two ends of the shell through bolts. According to the heat exchanger, through the movable heat exchange module, auxiliary shaking can be conducted on water drops, the water drops fall off from the heat exchange module, the retention time of the water drops on the heat exchange module is shortened, corrosion of the water drops to the heat exchange module is reduced, and the service life of the heat exchanger is prolonged.

The invention discloses an efficient heat exchange structure of energy-saving refrigeration equipment, and relates to the technical field of heat exchangers. Comprising a heat exchanger body, the heat exchanger body comprises a heat exchanger support, and a plurality of heat exchange pipes are arranged in the heat exchanger support; and a plurality of heat exchange fins are arranged on the heat exchange tube. Through the design of the gradient-thickness heat exchange fins and the synergistic effect of the gradient-thickness heat exchange fins and the super-hydrophobic coating and the high-temperature heat insulation coating, random nucleation of condensate water is restrained, condensate water is preferentially formed by the condensation collection grooves in the outer edges of the heat exchange fins due to low heat resistance and fast heat dissipation, and the heat dissipation efficiency is improved by combining the annular condensation collection grooves and millimeter-level flow guide burrs. The guide plate and the Y-shaped guide rib I are combined, a hydrophilic coating II is used for adsorbing water flow, a hydrophobic coating II is matched for blocking airflow interference, and the condensate water is ensured to quickly flow into a bottom condensate water collecting box along a preset path; and the influence of the condensate water on the heat exchange tube is avoided.

The utility model provides a heat exchanger and relates to the technical field of heat exchangers. The heat exchanger comprises a shell, two tube plates are arranged in the shell, a plurality of heat exchange tubes are arranged between the two tube plates, a cleaning mechanism is arranged on the side, away from the heat exchange tubes, of one tube plate in the shell, the cleaning mechanism comprises a support, a plurality of telescopic tubes are arranged on the side, close to the heat exchange tubes, of the support, and push blocks are arranged at the ends, close to the heat exchange tubes, of the telescopic tubes. The push blocks are in a cylinder shape with the outer diameter matched with the inner diameter of the heat exchange pipes, the positions of the telescopic pipes correspond to the positions of the heat exchange pipes, the telescopic pipes stretch out and draw back to drive the push blocks to enter and exit the corresponding heat exchange pipes, the push blocks coaxially slide with the telescopic pipes in the heat exchange pipes, and the telescopic pipes are driven by a hydraulic system to stretch out and draw back. According to the utility model, the blockage can be cleaned without stopping the operation.

A spacer device for incorporation into a bent-tube heat exchanger that includes a spine and a plurality of fingers that protrude from one side of the spine. The number of fingers in the spacer device is less than the number of tubes that are folded in a region to form the bent-tube heat exchanger. The plurality of fingers are configured to exert a force against the tubes and to provide and maintain a separation between the tubes in the folded region. A heat exchanger that includes the spacer device may also include a coating on the tubes in the folded region in order to reduce corrosion and increase the life-time of the heat exchanger. The method of forming the heat exchanger includes placing the spacer device between the tubes, such that the fingers lay on the tubes in the region to be folded and assist in the folding process.

A heat exchanger includes: a plurality of flat heat transfer tubes each having an elongated cross-sectional shape, each including refrigerant flow passages therein, and arranged apart from and in parallel with each other; and corrugated fins each provided between associated adjacent ones of the flat heat transfer tubes. Each of the corrugated fins has fin portions each having a plate shape, and is bent into a wave shape such that the fin portions are arranged alongside of each other in an axial direction of the flat heat transfer tubes. The fin portions include louvers. The louvers are made as different types of louvers to have different configurations, such that the different types of louvers are provided at respective selected sets of fin portions, to thereby cause different amounts of frost to be formed on the fin portions.

The invention belongs to the technical field of closed cooling towers, and discloses a countercurrent closed cooling tower and a cooling method.The countercurrent closed cooling tower comprises a tower body, a draught fan is fixedly connected to the top of the tower body, an air inlet is formed in the side wall of the bottom of the tower body, a water collecting tank is formed in the bottom of the tower body, and a pair of coil pipes is fixedly connected to the middle of the tower body; through cooperation of structures such as an annular shell, an annular spraying pipe and a concave panel, the possibility that scale is generated by the coil pipe is reduced, the heat exchange effect can be improved, during heat exchange, water in a collecting groove of the annular spraying pipe moving in a reciprocating mode is pumped and pressurized, the surface of the coil pipe is scoured in an annular mode, and the scale forming risk is reduced; and meanwhile, the sliding columns continuously extrude the wave-shaped grooves, so that the whole annular shell rotates in a reciprocating mode, close-distance washing can be more uniform, and therefore the heat exchange effect and durability of the coil pipe are efficiently improved.

A thermal distillation apparatus including vertical, planar evaporation surfaces on which a solution flows as thin films and which are the external surfaces of a first heat exchanger within which flows a first fluid that supplies heat to convert at least some of the volatile solvent of the solution to a vapor, vertical, planar condensation surfaces that are external surfaces of a second heat exchanger within which flows the first fluid or a second fluid that absorbs the thermal energy that is released as vapors of the solvent condensed on the condensation surfaces, air at ambient pressure between the condensation surfaces and the evaporation surfaces, means for supplying the solution to the evaporation surfaces, means for collecting the condensed vapors from the condensation surfaces, and means for collecting the unevaporated portion of the solution from the evaporation surfaces.

A decentralized supply and extract unit, with waste heat recovery, is claimed, said supply and extract unit being designed to be mounted into the external wall of a building, and having an indoor module (10) located on the inside of the wall of the building and having, adjoined to said indoor module, a heat-exchange module (20), comprising a cylindrical corrugated heat exchanger (4) with a plurality of heat-exchange air ducts (5) located along the axis of symmetry (2) of said heat exchanger, said air ducts being cross-sectionally similar and adjoining each other, forming a continuous corrugated volume of heat-exchange segments, a first separator and a second separator (6, 7) for separating and directing extraction and supply air flows (12, 13) in opposite directions in the heat-exchange air ducts (5), wherein the first separator and the second separator (6, 7) adjoin the heat exchanger (4), at both end surfaces thereof, and are installed on the axis of symmetry (2) of said heat exchanger. In addition, the unit comprises a first fan and a second fan (8, 9), housings (16, 17) which adjoin the first separator and the second separator (6, 7), at the ends of the separators facing away from the heat exchanger (4), wherein the axis (11) of one of the fans (6, 7) is located parallel with the axis of the other fan (6, 7) and is not aligned with said axis.

The present invention relates to a header tank provided in a heat exchanger having a two-row structure in which core parts are provided in two rows, and to a header tank having a structure in which a first tank is coupled to a header, and a second tank is coupled to be spaced apart from the first tank at a predetermined interval, such that condensate water condensed on surfaces of the core parts may be discharged between the first tank and the second tank, thereby satisfying all of pressure resistance of the header tank, temperature distribution of the core parts, and cooling performance of the heat exchanger.

A heat exchanger includes heat transfer tubes and a fin disposed between the heat transfer tubes. The fin includes a fin portion defining a flat surface and one or more heat transfer promoter groups including heat transfer promoters. The heat transfer promoters extend from one adjacent heat transfer tube to the other adjacent heat transfer tube and slope relative to the fin portion. The heat transfer promoters include a first heat transfer promoter disposed most upstream in the air flow direction. A first drain space is provided between the first heat transfer promoter and an air upstream part of the fin portion that is located closest to and upstream of the first heat transfer promoter in the air flow direction. A second drain space is provided between the heat transfer promoters that are adjacent. The first drain space has a larger area than the second drain space.

The present invention relates to a heat exchanger (100) that includes a first heat exchanger core (1) and a second heat exchanger core (2) arranged side by side. The first heat exchanger core (1) includes a first main segment (10, 10A, 10B), a first connection segment (19, 19A, 19B) connected with the first main segment (10, 10A, 10B), and a first header (13). The first main segment (10, 10A, 10B) includes a plurality of first heat exchange tubes (11, 11A, 11B) arranged in a second direction (2) perpendicular to a first direction (D1). The second heat exchanger core (2) includes a second main segment (20), a second connection segment (29) connected with the second main segment (20), and a second header (23). The second main segment (20) includes a plurality of second heat exchange tubes (21) arranged in the second direction (D2). The first main segment (10, 10A, 10B) includes a first wind resistance region (17, 17A, 17B) and a second wind resistance region (18, 18A, 18B) arranged in a third direction (D3) perpendicular to the first direction (D1) and the second direction (D2), the second wind resistance region (18, 18A, 18B) being adjacent to the first header (13), and a wind resistance of the second wind resistance region (18, 18A, 18B) is smaller than that of the first wind resistance region (17, 17A, 17B), thereby improving the performance of the heat exchanger (100).

The utility model discloses a brazed plate heat exchanger, including box body, detachable cover plate, sealing plug board and absorbent sponge, said box body inside is provided with heat exchanger main body, said box body inside bottom end is provided with the recess, said recess inside is fixedly connected with a plurality of water level sensor, said box body one side is provided with detachable cover plate, said box body one side is provided with the sealing plug board, said box body is provided with the absorbent sponge. A sealing groove is formed in one side of the box body, a partition plate is fixedly connected to the interior of the sealing groove, a sealing insertion plate is fixedly connected to the outer ring of one side of the detachable cover plate, the sealing insertion plate and the sealing groove are matched in an inserted mode, and a water absorption sponge is inserted into a sunken groove. According to the utility model, the detachable cover plate, the sealing detachable plate, the partition plate and the sealing groove are arranged, the bolts penetrate through the detachable cover plate and the box body and are in threaded fastening with the threaded holes, and the sealing insertion plate on one side of the detachable cover plate is inserted into the sealing groove and abuts against the partition plate in a sealing manner, so that stronger sealing fit is achieved, and the box body is in sealing fit with the detachable cover plate.

The invention discloses an all-welded heat exchanger convenient to maintain and a maintenance method thereof, and belongs to the technical field of heat exchangers. An all-welded heat exchanger convenient to maintain comprises an installation box used for refrigerant circulation and further comprises a heat exchange pipe fixedly installed in the installation box, a top pipe opening of the heat exchange pipe extends to the position above the installation box, and a bottom pipe opening of the heat exchange pipe extends to the position below the installation box. The two sides of the mounting box are fixedly connected with a liquid inlet pipe and a liquid outlet pipe correspondingly, and the inner diameter of the heat exchange pipe is not smaller than 100 MM; the inner diameter of the heat exchange pipe is set to be not smaller than 100 MM, compared with a traditional heat exchanger pipeline, the diameter of the pipeline is increased, the cleaning and maintaining difficulty is reduced, the increased inner diameter of the pipeline is matched with the conical ring, the pressure of airflow passing through the heat exchange pipe is increased, meanwhile, the contact area of the airflow and the heat exchange pipeline is increased, and the heat exchange efficiency is improved. Therefore, the heat exchange effect of the airflow and the heat exchange medium is improved.

The utility model discloses a wide-channel plate type low-temperature economizer drainage device, and relates to the technical field of economizers. Comprising a water collecting tank arranged at the bottom of the economizer, the top face of the water collecting tank is fixedly connected and communicated with a plurality of water inlet assemblies, each water inlet assembly corresponds to and is communicated with one heat exchange plate, the center of the bottom of the water collecting tank is fixedly connected and communicated with a drainage pipe, and a first control valve is installed on the drainage pipe. The water collecting tank can be communicated with the bottoms of the heat exchange plates through the water inlet assembly, when the coal economizer is shut down, water in all the heat exchange plates installed in the coal economizer can be discharged by opening the first control valve, the water in heat exchange plate cavities can be discharged when the coal economizer is shut down, and the heat exchange plate cavities are prevented from being blocked. Water stored in the heat exchange plate cavity is effectively prevented from corroding the heat exchange plate cavity, and the service life of the economizer is effectively prolonged.

The utility model discloses a microchannel heat exchanger and heating and ventilation equipment with the microchannel heat exchanger, the microchannel heat exchanger comprises a first microchannel flat tube, a second microchannel flat tube, a connecting assembly, a first fin group and a second fin group, in a first direction, the first microchannel flat tube and the second microchannel flat tube are arranged at an interval; the connecting assembly is connected with the first micro-channel flat pipe and the second micro-channel flat pipe, the first fin set and the second fin set are arranged in the first direction, each fin set comprises a plurality of fins arranged at intervals in the second direction, the first fin set is installed on the first micro-channel flat pipe, the second fin set is installed on the second micro-channel flat pipe, and the first fin set and the second fin set are arranged in the first direction. The first direction is perpendicular to the second direction. According to the micro-channel heat exchanger, the heat exchange performance of the micro-channel heat exchanger is improved, meanwhile, the assembling difficulty of the micro-channel heat exchanger can be reduced, and the assembling efficiency is improved.

The peak closed type condensation cooler comprises a box body, and an air mixing chamber is arranged on the upper portion of an inner cavity of the box body; two connected fog dispersal modules are arranged in the box body, a resistance reducing shutter and a water distribution device are sequentially arranged between the fog dispersal modules and the side wall of the box body, and the two fog dispersal modules, the resistance reducing shutter and the water distribution device divide a lower cavity of the box body into a first cavity, a second cavity and a third cavity; the fog dispersal module is provided with a cold air channel and a hot air channel which communicate with the air mixing chamber. Through the structural design of bottom air inlet, the sufficient fresh air introduction area can be achieved on the premise that the height of equipment is not increased, then the air path resistance is reduced, the fan operation pressure head and energy consumption are reduced, and the overall energy-saving performance of the equipment is improved. Meanwhile, on the premise that the vertical size of the equipment is not increased, the lift requirement of the spraying water pump is reduced, the energy consumption and the operation burden of the water pump are reduced, and the operation economical efficiency and the structure compactness of the whole equipment are improved.

The invention discloses a multi-stage evaporative condenser and a condensing unit thereof, and belongs to the technical field of condensers, the multi-stage evaporative condenser comprises a condensing pipe, a condenser control box and a compressor are arranged on the condensing pipe, a steam circulating mechanism is arranged behind the condensing pipe, and a shunting partition plate is arranged in the end part of the condensing pipe. Through the arrangement of the upper through partition plate, the lower through partition plate and the two-way partition plate, low-temperature water flow and high-temperature steam can flow reversely, the scientific and effective heat exchange principle is followed, a low-temperature side inlet just meets low-temperature side steam, a high-temperature side outlet corresponds to a high-temperature side steam inlet, and the reasonable temperature difference and sufficient heat exchange in the whole process are guaranteed; meanwhile, due to the arrangement of the suction assembly and the suction base, tiny impurities in water flow can be deposited around the bottom through centrifugal force by means of the centrifugal impeller, then the collected high-concentration impurity water flow is automatically discharged out of the system through the negative pressure suction system below the elastic membrane ring, and formation of water scale is inhibited from the source.

The utility model discloses an air temperature type vaporizer defrosting device, which relates to the technical field of defrosting devices and comprises a fixing frame, two cross rods are fixed at the bottom of the fixing frame, two universal wheels are mounted at the bottoms of the cross rods, a defrosting mechanism is arranged at the bottom of the fixing frame, and the defrosting mechanism is arranged on the fixing frame. The defrosting mechanism comprises a fan, an air inlet pipe, a heating box, a ventilation pipe, a round shell, an air conveying pipe, an annular shell and two air outlet pipes, and a transmission mechanism is arranged in the defrosting mechanism. According to the air temperature type vaporizer defrosting device, the transmission mechanism is arranged, the draught fan and the heating box are started, the draught fan sucks external air, the air enters the heating box, and the heated air is conveyed into the round shell, so that the air pushes the blade plate and the rotating rod to rotate and then enters the annular shell through the air conveying pipe; and then the air enters an air outlet pipe and is discharged from an air outlet hole to heat and defrost the air temperature type vaporizer, meanwhile, a rotating rod drives a connecting rod to rotate, and the connecting rod drives the air outlet pipe to rotate.

The invention discloses a fin, a preparation method thereof and a heat exchanger, and relates to the technical field of heat exchange. The fin comprises a fin base body and a hydrophobic coating, wherein the surface of the fin base body is coated with the hydrophobic coating; the fin base body comprises a heat transfer section and a drainage section which are arranged in the first direction of the fin base body, and the drainage section is arranged close to the windward side of the fin base body. The heat transfer section is provided with a pipe hole for a heat exchange pipe to penetrate through, and the drainage section is provided with a drainage groove. The designed fins can improve the heat exchange efficiency of the heat exchanger and reduce frosting on one hand, and can prolong the service life of the heat exchanger and maintain the heat exchange efficiency of the heat exchanger at a high level for a long time on the other hand.

The invention provides a peak closed type condensation cooling device with water-saving, energy-saving and fog-dissipation functions. The peak closed type condensation cooling device comprises a box body, and an air mixing chamber is arranged on the upper portion of an inner cavity of the box body; an inner cavity of the box body is sequentially connected with a fog dispersal module, a resistance reduction shutter and a water distribution device, the fog dispersal module divides the lower inner cavity of the box body into a first cavity and a second cavity, the fog dispersal module is provided with a cold air channel and a hot air channel which are communicated with the air mixing chamber, the first cavity is communicated with the cold air channel, and the second cavity is communicated with the hot air channel; an evaporation coil pipe is mounted at the position, close to the side wall of the box body, of the second cavity, and water dripped from the water distribution device can fall on the heat exchange wall surface of the evaporation coil pipe; damp and hot air at an outlet of the evaporation coil pipe is partially condensed through the rhombic fog dissipation filler, the condensed damp and hot air is mixed with cold air after heat exchange, the moisture content is reduced, the relative humidity is reduced, the temperature is reduced, then the air is discharged into the atmosphere to be in contact with environment low-temperature air, and the rime fog phenomenon is not prone to being generated.

A cooling apparatus including an evaporator through which a refrigerant moves to absorb heat from a cooling target fluid that is a fluid to be cooled, wherein the evaporator includes a first evaporator module, a second evaporator module, a surface heating element extending along a plane perpendicular to a first direction and arranged between the first evaporator module and the second evaporator module, and a sensor module including a voltage electrode arranged between the first evaporator module and the second evaporator module and a ground electrode arranged to be spaced apart from the voltage electrode with any one of the first evaporator module and the second evaporator module between the ground electrode and the voltage electrode.

The invention belongs to the field of textile, and particularly relates to a dehumidification device for textile workshop cooling equipment, which comprises a device box, filter assemblies are arranged on the front and rear side surfaces of the device box, air supply structures are arranged in the filter assemblies, a support frame is fixedly connected to the lower surface of the device box, and a plurality of air holes are formed in the surface of the support frame. The inner side face of the device box is fixedly connected with a condensation pipe through a supporting column. A condensation pipe is arranged in the device, row brushes are arranged on the two sides of the condensation pipe, rotation of a first reciprocating lead screw is controlled through a third motor, then the row brushes are controlled to reciprocate on the two sides of the condensation pipe, air entering the device can condense water vapor into water drops, the water drops are attached to the surface of the condensation pipe, and the water drops are scraped by the row brushes, so that the condensation effect is improved. Water drops can be scraped off to wait for treatment, and meanwhile water vapor can be prevented from entering air again.

The invention discloses a total heat exchanger, which belongs to the field of heat exchangers and comprises a total heat exchanger body, a heat exchange cavity is arranged in the total heat exchanger body, and a first air inlet cover and a second air outlet cover are detachably arranged on one side of the total heat exchanger body. According to the total heat exchanger, after the humidity sensor in the total heat exchanger body detects that the humidity value in the total heat exchanger body reaches the preset value, the signal can be transmitted to the driving motor, so that the output end of the driving motor outputs the signal, and the output end of the driving motor can drive the driving wheel to rotate after outputting the signal; the first scraping frame and the connecting plate can scrape off water drops on the whole heat exchange machine core in the front-back direction, part of the water drops on the heat exchange machine core can be pushed towards the edge of the heat exchange machine core while the water drops on the heat exchange machine core are scraped off, and finally the water drops fall off from the edge of the heat exchange machine core.

This heat exchanger (27) comprises: a plurality of fins (43) that are disposed at interval in the thickness direction; and a plurality of flat cross-sectional shape heat transfer pipes (41) that respectively extend through the plurality of fins (43) in the thickness direction and are disposed at intervals in a direction perpendicular to the thickness direction. Each fin (43) is provided with: a plurality of cutout portions (53) that extend in an insertion direction orthogonal to the direction in which the plurality of heat transfer pipes (41) are disposed, and into which at least a portion of the heat transfer pipes (41) are inserted; and a plurality of pipe peripheral beads (55) that are offset in the thickness direction of the fins (43) and follow the flat cross-sectional shape of the heat transfer pipes (41) along each of the plurality of cutout portions (53).

The invention relates to a fin, a fin type heat exchanger and a heat pump system, the fin is applied to the fin type heat exchanger, and the fin is provided with a first edge, a second edge, a drainage groove and a mounting through hole; the first seamed edge and the second seamed edge are sequentially distributed in the air flow direction; the drainage groove comprises a water diversion part and a drainage part, the water diversion part extends in the flow direction of the airflow, the water diversion part is provided with a first end and a second end, the first end is close to or located on the first edge, the drainage part extends downwards in an inclined mode, the drainage part is provided with a third end and a fourth end, the third end is communicated with the second end, and the fourth end is communicated with the third end. The fourth end is close to or located on the second edge; the installation through holes are formed in the positions, where the drainage grooves are not formed, of the fins. By the adoption of the heat exchanger, the drainage capacity of the fins can be improved, then the frosting speed of the fins is delayed, and the overall heat exchange performance of the heat exchanger is improved.

The utility model discloses a condensate separating mechanism for a shell-and-tube heat exchanger, which relates to the technical field of shell-and-tube heat exchange, and comprises a shell and a support arranged on the shell, and further comprises a heat inlet pipe arranged on the shell and fixedly connected with the shell; the flange is arranged on the shell and is fixedly connected with the shell; the heat pipe cavity is arranged in the shell; the heat flow pipe assembly is arranged in the shell; the distance fixing assembly is arranged on the shell; the heat outlet pipe is arranged on the shell and is fixedly connected with the shell; the cold inlet pipe is arranged on the shell and is fixedly connected with the shell; the cold outlet pipe is arranged on the shell and is fixedly connected with the shell; by arranging the filtering assembly, solid impurities in condensate can be effectively removed through the condensate separating mechanism in the heat exchange process, the condensate is repeatedly used, and the use cost is greatly reduced.

The utility model relates to the technical field of evaporator defrosting, and discloses an evaporator vibration defrosting mechanism which comprises a frame, vibration motors are arranged on the two sides of the frame, output shafts of the vibration motors are fixedly connected with silk screens, and refrigerant pipes are arranged on the two sides of the frame. According to the vibration defrosting mechanism for the evaporator, the vibration motor, the silk screen, the refrigerant pipe and the connecting pipe are used, frost on the surface of the evaporator can be removed more comprehensively under the action of the external airflow direction, and the vibration motor and the silk screen can be fixed and supported through the moving wheels, the springs, the spring limiting columns and the bolts; and meanwhile, the vibration amplitude is limited, the equipment is prevented from being damaged, the defrosting effect is improved, the problem of how to efficiently defrost is solved, the effect of more thorough defrosting can be achieved, the influence on the equipment is avoided during defrosting, more efficient use of the whole device in practice is facilitated, and application and popularization of the device are facilitated.

To provide a condenser structure for a dehumidifier that reduces noise and energy consumption and does not have irreversible effects on the environment. [Solution] The condenser structure for a dehumidifier includes an upper cover assembly 1 having an upper chamber, and a lower cover assembly 2 having a lower chamber, and between the upper cover assembly and the lower cover assembly, a first suction pipe assembly consisting of a plurality of converged first thin-walled suction pipes 31 and a second suction pipe assembly consisting of a plurality of converged second thin-walled suction pipes 41 are provided, both of which communicate with the upper chamber in the upper cover assembly, and the lower cover assembly is provided with a hot air inlet 211 communicating with the first suction pipe assembly and a cold air outlet 212 communicating with the second suction pipe assembly. A complete circulation space is formed by the upper cover assembly, the lower cover assembly, the first suction pipe assembly, and the second suction pipe assembly, and the thin-walled suction pipes increase the heat exchange speed and the water condensation speed, and no refrigerant or compressor is required.

The disclosure relates to the field of ventilation systems, specifically to ventilation systems in residential and non-residential (commercial) buildings. Specifically, the invention relates to decentralized supply and extract units with waste heat recovery and can be used for transmitting heat and power from an extraction air flow, i.e. from a flow of air extracted from a building, to a supply air flow, i.e. a flow of fresh air being drawn into a building, for the purpose of replacing spent air from the building.