The invention relates to refrigeration, and particularly to evaporators of refrigerating machines. The evaporator includes at least two plate-fin package. The packages are arranged in an alternating channels for the cooling medium and the channels for the refrigerant. In these channels placed corrugated insert, forming a parallel cells. Channels for the refrigerant are connected respectively from the bottom to the dealer, and the top to collect the collectors. Between packages formed standpipe cavity to drain not evaporated portion of the refrigerant from collecting collector at a dealer. Standpipe cavity connected to said collectors. In collecting manifold installed the bumper, located above the standpipe cavity and connected to paratwada the pipe, installed in the collecting reservoir. Each cell channels for the refrigerant is made with a hydraulic diameter lying in the range of 0.5 to 3.0 mm, and a standpipe cavity made with a minimum cross-sectional dimension of at least 10 mentioned hydraulic diameters. 4 C.p. f-crystals, 6 ill.The invention relates to refrigeration, in particular, to the evaporators of refrigerating machines. x environments.The evaporator can find the most widely used in cryogenics, energy, gas and chemical industry, food machinery, etc.,Known evaporators containing plate-fin package, having arranged in an alternating channels for the cooling medium and the channels for the refrigerant corrugated surfaces inside, forming parallel posted by cell, distributing and collecting manifolds connected to the channels for the refrigerant (see, for example, U.S. patent No. 3151676, CL 165-166, 1970).In this evaporator standpipe cavity is absent, the cell size is not specified.The technical result set by the invention, the evaporator is not achieved, because the conditions for the free circulation missing. There is also no data about the size of the cells, providing an intensification of heat transfer.Also known evaporators containing at least two plate-fin package, having arranged in an alternating channels for the cooling medium and the channels for the refrigerant, and the channels for the refrigerant are installed corrugated insert, forming parallel spaced cells. The evaporator has a distributing and collecting collec).This evaporator is chosen for the prototype. However, in this evaporator is missing standpipe cavity and there is no data about the size of the cells.Thus, in this evaporator the technical result set by the invention is not achieved.The objective of the invention is to provide a reliable in operation of the evaporator with reduced dimensions and weight characteristics.The technical result achieved by the invention, - the enhancement of boiling heat transfer to the refrigerant and providing conditions for free circulation of the latter.This technical result is achieved in that the evaporator includes at least two plate-fin package, having arranged in an alternating channels for the cooling medium and the channels for the refrigerant corrugated surfaces inside, forming parallel posted by cell, distributing and collecting manifolds connected respectively top and bottom channels for the refrigerant, and also formed between packages standpipe cavity to drain not evaporated portion of the refrigerant from collecting collector to dealer, also connected to said collectors, collecting manifold installed the bumper, located n is eat each cell channels for the refrigerant is made with a hydraulic diameter, lying in the range of 0.5 to 3.0 mm, and a standpipe cavity made with a minimum cross-sectional dimension of at least 10 mentioned hydraulic diameters.In private cases, the technical result is achieved by the fact that in the evaporator, characterized by the above features, the axis of the channels for the cooling medium is made perpendicular to the axes of the channels for refrigerants with the formation of cross-exact flow of the refrigerant and the cooling medium; the axis of the channels for the cooling medium is made parallel to the axes of the channels for the refrigerant with the formation of a counter-current flow of the refrigerant and the cooling medium; plate-fin packets are parallel; plate-fin packets counter is inclined at an angle not exceeding 3with the formation of a standpipe cavity uniformly extending from the collecting reservoir to the dealer.The evaporator illustrated in the drawings, which depict the evaporator with two packages. In the evaporator can be used any number of packages. Options inside tilted packages are not illustrated, since small angle makes them visually indistinguishable from parallel.In Fig.1 shows a dapc inlet and one outlet manifolds for refrigerated environment.In Fig.2 is a longitudinal section of the channel for the refrigerant with a corrugated insert of Fig.1.In Fig.3 is a longitudinal section of the channel for a cooling medium with a corrugated insert of Fig.1.In Fig.4 depicts a perspective view of the same evaporator, but with two inlet and two outlet manifolds for refrigerated environment.In Fig.5 - describe the evaporator is a perspective view with cross-accurate scheme in the absence of collectors for cooling medium.In Fig.6 - the same evaporator, as shown in Fig.5, but with manifolds for refrigerated environment.The evaporator includes two plate-fin package 1. Each package is placed in an alternating channels 2 for the refrigerant channels 3 for the cooling medium. In each channel 2, 3 placed corrugated surface 4 forming placed parallel to the cells 5, 6. The channels 2 are respectively top and bottom of the connected dealer 7 and collecting 8 collectors refrigerant. Between packages formed standpipe cavity 9, is also connected to the collectors 7, 8. In the collecting reservoir 8 installed bumpers, located above the measuring chamber 9 and is connected to paratwada the pipe 10, is also installed in the collecting reservoir 8. In the particular case of the bump morainic may be very different, for example, in the form of screens, grids, etc., Each cell 5 channels of the refrigerant is made with a hydraulic diameter lying in the range of 0.5 to 3.0 mm, and a standpipe cavity 9 is made with a minimum cross-sectional dimension of at least 10 mentioned hydraulic diameters.When running on counterflow evaporator can have one for the cooling medium supply manifold 12 and one outlet manifold 13 for the cooling medium. A possible variant, in which each packet has to be cooled environment its inlet 14 and its outlet 15 collectors (see Fig.4).Plate-fin packets may be slightly (up to 3) oppositely inclined with education standpipe cavity is uniformly expanding in the direction from the collecting reservoir to the dealer.The proposed evaporator operates as follows.The refrigerant, such as freon, ammonia, flows from the distributing manifold 7 in the channels 2, i.e. in cell 5, and the cooled medium flows from the supply reservoir (12 or 14) in the channels 3, that is, in cell 6. Thus, the refrigerant receives heat from the cooling medium through the walls of the channels and cells. As a result, the refrigerant boils, evaporates and as a PA is the path which is the bumper, not evaporated portion of the mixture through a standpipe cavity is returned to the reservoir 7, thereby providing for free circulation of the refrigerant. The evaporated portion of the mixture flows into paratwada pipe 10 and then to the corresponding device belonging to the technological scheme, such as a compressor (not shown). As the cooling medium may be air, liquid fuel (gasoline), liquid coolants (antifreeze / coolants, Ecosol), etc., by cooling the atmospheric air inlet and outlet headers are missing, the air using fan blows the appropriate channels 3.When using the above-mentioned liquid media the last act in the manifolds 12, 14 and are removed through the collectors 13, 15.Depending on the technology use of the evaporator can be applied as a counter-current and cross-accurate scheme for the movement of the refrigerant and the cooling medium.The use of inlet and outlet manifolds for each package with a thermal point of view is more advantageous, however, for constructional reasons, in some cases, you have to use the scheme with two collectors.The choice of the optimal cell size of 5 and a minimum cross-sectional dimension Aviemore high intensity boil, when the cell size is 5 commensurate with the size of the tear in the bladder, under conditions of relatively low hydraulic resistance and the free circulation of the refrigerant.
Claims1. The evaporator containing at least two plate-fin package, having arranged in an alternating channels for the cooling medium corrugated surfaces inside forming placed parallel to the cells and channels for refrigerant corrugated surfaces inside, forming parallel placed cells connected respectively from the bottom to the dealer, and the top to collect the collectors, and also formed between packages standpipe cavity to drain not evaporated portion of the refrigerant from collecting collector to dealer, also connected to said collectors, collecting manifold installed the bumper, located above the standpipe cavity and connected to paratwada the pipe, installed in the collecting manifold, with each cell channels for the refrigerant is made with a hydraulic diameter lying in the range of 0.5 to 3.0 mm, and a standpipe cavity made with a minimum size of the cross-the cross of the cooling medium is made perpendicular to the axes of the channels for the refrigerant with the formation of cross-exact flow of the refrigerant and the cooling medium.3. Evaporator under item 1, characterized in that the axis of the channels for the cooling medium is made parallel to the axes of the channels for the refrigerant with the formation of a counter-current flow of the refrigerant and the cooling medium.4. Evaporator under item 1, characterized in that the plate-fin packets are parallel.5. Evaporator under item 1, characterized in that the plate-fin packets counter is inclined at an angle not exceeding 3with the formation of a standpipe cavity is uniformly expanding in the direction from the collecting reservoir to the dealer.
FIELD: mechanical engineering.
SUBSTANCE: wire-tubular evaporator is provided with guide plate whose body is extended lengthwise and at least one tubular clip for securing the plate to evaporator tube. Tubular clip is mounted on bracket extending aside from plate body.
EFFECT: enhanced accuracy of fitting the guide plate along center line of evaporator.
8 cl, 3 dwg
FIELD: cooling and air conditioning system components, particularly evaporators.
SUBSTANCE: evaporator comprises of the first elongated flat multi-channel pipe having serpentine configuration defined by elbow members bent across the minor dimension thereof. The pipe has a number of spaced apart parallel parts extending between ends of the first pipe. Inlet member of clamping means is connected to the first pipe end, outlet member thereof is fastened to the second end thereof. Ribs are located between neighboring parts of the first pipe. The second elongated flat multi-channel pipe forms suction radiator loop. The second pipe is connected to the first one so that side wall of the second pipe defining major pipe dimension is connected to side wall of the first pipe directly upstream of the outlet member of the clamping means to provide improved heat exchange between the pipes. The second pipe ends are also fitted with inlet and outlet members of clamping means.
EFFECT: increased compactness.
20 cl, 8 dwg
FIELD: refrigeration equipment.
SUBSTANCE: cooling agent evaporator comprises cooling agent pipeline and surface connected to the pipeline through heat-conductive connection. The surface is used as heat-exchanger and is covered with water-repellent oil film. The evaporator may be of lamella type (plate type).
EFFECT: decreased noise during evaporator operation.
3 cl, 1 dwg
FIELD: cooling equipment and other industry, for instance, chemical industry.
SUBSTANCE: evaporator comprises panels or coil pipe batteries, as well as liquid and vapor manifolds with coolant. Panels or coil pipe batteries or manifold batteries extend in horizontal direction one under another and are shifted one from another. The panels or coil pipe batteries or manifold batteries are enclosed with iron sheet having varying height. Panels or coil pipe batteries or manifold batteries are inserted in metal frame fixedly connected with metal tray and hermetically closed with plastic sheets along perimeter thereof.
EFFECT: provision of necessary heat carrier temperature and continuous temperature maintenance, decreased power inputs and heat carrier volume, reduced device costs and increased safety.
1 cl, 1 dwg
SUBSTANCE: milk refrigerating unit contains square reservoir with external heat-insulating coating, evaporator, force-suction manifold of compressor-condenser device. Evaporator is of slot type and represents two halves of V-shaped bottom with injector and suction header each, which are connected accordingly with force and suction manifolds of compressor-condenser device, at that slot evaporator is made with seam welding with seam width of at least 4 mm, pitch of seams of not more than 35 mm, depth rolling of slots of not more than 3 mm.
EFFECT: exclusion of evaporator damage during its flushing with hot water.
SUBSTANCE: invention relates to refrigerating equipment used in climate tests. The proposed heat exchanger comprises a housing and evaporator. The heat exchanger housing is separated by the main baffle into inlet and outlet chambers. The inlet chamber inlet accommodates deflecting baffle. The outlet chamber outlet accommodates the outlet pipe-bend and houses the evaporator and additional baffle. The inlet and outlet chambers communicate via a gap arranged between the main baffle and heat exchanger housing. The fan is arranged between the inlet pipe-bend and the housing. The bypass is provided for between the inlet and outlet pipe-bends.
EFFECT: longer faultless operation of evaporator.
2 cl, 1 dwg
FIELD: personal demand items.
SUBSTANCE: refrigerator with a freezing chamber includes a through internal container with a freezing chamber and a storage compartment for cooled products, which are rigidly connected to each other. There is no connection line or broken edge, at that, evaporator (9) is installed on compartment (6) of the freezing chamber. Evaporator is made in the form of a box with winding, which envelopes the freezing chamber in a circumferential direction on its four sides.
EFFECT: providing more effective cooling of products.
8 cl, 3 dwg
FIELD: heating systems.
SUBSTANCE: anti-frost evaporation tube of refrigerator with drawers consists of internal housing wherein there provided is food storage compartment for arranging drawer-container, and in the latter, low temperature is maintained by means of evaporation tube for cooling agent circulation, which is located around external part of internal housing. Evaporation tube includes curved parts located on both side surfaces of internal housing and straight tube part located on upper surface of internal housing and connected to curved tube parts.
EFFECT: use of this invention allows eliminating frost formation on roof surface of refrigerator internal housing.
5 cl, 7 dwg
FIELD: heating systems.
SUBSTANCE: invention refers to cryogenic equipment, and namely to cryogenic liquid evaporators, and can be used in gasification plants. Cryogenic liquid evaporator includes housing with cryogenic liquid supplying assembly and cooling agent output assembly and heat exchange assembly made in the form of a tube bank, inter-tube space of which includes dump packing. In addition, heat exchange assembly is equipped with gas distributing grid located in lower part of tube bank and having the shape of flattened cone installed with smaller base upwards. Dump packing is located on gas distributing grid.
EFFECT: use of invention will allow more efficient use of thermal and physical properties of heat exchange assembly of cryogenic liquid evaporator owing to arrangement of dump packing with section having constant resistance, and creating conditions of uniform distribution and passing of warm gas vapours through the head piece.
SUBSTANCE: invention concerns refrigerating engineering. A heat exchanger (301) is designed to be connected to an evaporator (201) of a heat-transfer system wherein a working medium used is compressed and evaporated. The heat exchanger comprises a first tube (107) with its first end (303) shaped in such a way to be attached to an outlet fitting (204) of the evaporator and to transfer the medium from said outlet fitting, and the second tube (108) with its first shaped in such a way to be connected to the inlet fitting of the evaporator and to transfer the medium to said inlet fitting. The second tube is mounted inside of the first tube, or in thermal contact thereto, herewith ensuring the relations (109, 110) of the respective lengths of the first and second tubes to enable heat exchange between the mediums in these tubes. The first tube is made of the steel alloy consisting of ingredients reducing hardness of said steel alloy, thereby easing bend of the tube and enabling to bend the first tube in installation in the heat transfer system.
EFFECT: application of the invention allows reducing cost of the heat exchanger.
31 cl, 10 dwg