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
The invention relates to refrigeration equipment used in installations for conducting environmental tests in a wide temperature range from -80°C to +200°C, which determines the specificity of this equipment. Due to the fact that the evaporator of the refrigeration unit is placed in the climatic chamber volume (Russian Federation Patent No. 2076350, CL G05D 23/30), where the temperature can reach +200°C, the gas pressure in the evaporator exceeds the allowable limits, which significantly reduces the uptime of the evaporator and a refrigeration unit for which the evaporator is loading.
The closest in technical essence and the achieved result for the proposed device is a plate evaporator (see A.S. SU 1759118 A1, Plate evaporator. Medvedev Z.P., CL F25B 39/02)containing packages of flat sheets, forming channels for the cooling medium and the channels for the refrigerant. The disadvantage of this vaporizer is that a cooled environment, the temperature of which reaches up to +200°C, in direct contact with the channels, which evaporates the refrigerant, which leads to unacceptable increase in pressure in these channels, and hence in the refrigeration unit.
The aim of the invention is to increase uptime of the evaporator and the refrigerating unit through which the devices normal temperature mode.
A heat exchanger comprising a housing and an evaporator, characterized in that the housing of the heat exchanger is divided into a primary partition on the input and output camera input camera input has an input branch, and installed inside the bumper retainer, the output of the output of the camera is set to output branch, and installed inside the evaporator and an additional partition, and the input and output chambers are connected by gap made between the primary baffle and the housing of the heat exchanger.
Between the input diversion and case fan installed, and between the input and output taps installed bypass.
The drawing shows a diagram of the heat exchanger.
The purpose of the invention is achieved by the installation of the evaporator 9 in the heat-insulated housing 6, separated primary partition 5 on input 2 and the output 7 of the camera to input 1 and output 10 taps, installation of the bumper 3 and the additional 8 partitions and the gap 4 between the primary baffle and the housing, and the bumper 3 and an additional 8 partitions installed in such a way that the incoming input allocation 1 the air is pre-cooled in the inlet chamber 2 before it reaches the evaporator 9.
To improve heat transfer between the input tap 1 and the housing 6 of the heat exchanger installation of the fan, and between input 1 and output 10 taps sets forth the tsya bypass, that increases the efficiency of the heat exchanger.
The heat exchanger works as follows. The air flow circulating in a climatic chamber, flows through the input tap 1 in the input chamber 2 and reflected from the bumper of wall 3 through the gap 4 between the main wall 5 and the housing 6 of the heat exchanger, flows into the output chamber 7 having an extra partition 8, pre-cooled air is supplied to the evaporator 9 and then output through the outlet 10 is fed back into the climate chamber.
1. A heat exchanger comprising a housing and an evaporator, characterized in that the housing of the heat exchanger is divided into a primary partition on the input and output camera input camera input has an input branch, and installed inside the bumper retainer, the output of the output of the camera is set to output branch, and installed inside the evaporator and an additional partition, and the input and output chambers are connected by gap made between the primary baffle and the housing of the heat exchanger.
2. The heat exchanger according to claim 1, characterized in that between the input diversion and case fan installed, and between the input and output taps installed bypass.
SUBSTANCE: invention relates to heat exchange apparatus and can be used in power engineering, gaseous, metallurgical, chemical and food industrial sectors. The shell-and-tube heat exchanger contains a system of different-type partitions, alternating among themselves along the shell forming chambers in the tube side, part of which is installed with a circular clearance relative to the shell, and the others are adjacent to the shell and are supplied with a central hole. In the chambers there are longitudinal spiral partitions with opposite spin angle, aligned to them and adjacent ends to the edges of the perpendicular partition. The pipes are provided with fins, and the fins are made in such sizes and shapes, that a helical cavity is formed on the inner surface of the heat-exchanger shell. The fins can be made from different-type partitions, alternating among themselves along the shell forming chambers in the tube side, depending on the versions of implementing the fins. The heated medium is directed either tangentially along the helical cavity, or turned by 180°. To improve contact of the fins with the pipe, a "skirt" is formed.
EFFECT: intense heat transfer.
FIELD: heat-exchanging equipment, particularly tube-and-shell heat-exchangers.
SUBSTANCE: heat-exchanger comprises shell adapted to receive the first fluid and deflecting partitions installed at an angle to longitudinal heat-exchanger axis and shaped as quadrants. The partitions guide the first fluid flow into helical structure with uniform velocity. Each partition has corresponding pair of opposite flat or curved sides and a number of spaced apart orifices receiving a number of axial tubes adapted to circulate the second fluid flow. In the second embodiment heat-exchanger comprises quadrant deflecting partitions crossed with tube bundle carrying the second fluid flow and adapted to guide the first fluid flow along helical path across tube bundle. Said heat-exchanger also has reinforcing unit, which selectively unites tube bundle carrying the second fluid flow to minimize vibration and increase supporting thereof. Tube-and-shell heat-exchanger made in accordance with the third embodiment comprises the first row of quadrant deflecting partitions and the second row of quadrant deflecting partitions, which define double helical structure crossed with tube bundle carrying the second fluid flow and extending at an angle to longitudinal heat-exchanger axis to direct the first fluid flow into helical structure with substantially uniform velocity.
EFFECT: improved heat-exchanging efficiency, increased uniformity of fluid flow velocity as fluid flow passes along helical path.
20 cl, 4 dwg
FIELD: heat power engineering.
SUBSTANCE: device comprises sealing member made of Z-shaped metallic wire grids. The bends of the member are arranged at the sites of diverging and converging of the space between the tube bank and casing of the heat exchanger.
EFFECT: enhanced efficiency.
FIELD: heat-exchangers, particularly submersible ones.
SUBSTANCE: heat-exchanger comprises body perforated with orifices located at cylindrical inlet chamber height, tube plate, tube bundle arranged so that coolant is directed transversely to the tube bundle. Heat exchanger also has displacers and spacing grid. Hexahedral collector is formed on tube bundle at inlet chamber height so that the collector is coaxial to the body. The hexahedral collector perimeter is free of tubes. Radial channels extend from collector corners to tube bindle perimeter. The radial channels are also free from tubes. Displacers are installed in spacing grid below inlet chamber.
EFFECT: possibility of uniform coolant flow over each heat-exchanging tube, provision of equal temperature characteristics at each tube outlet and reduced vibration of tubes in tube bundle.
FIELD: the invention is meant for heat-exchanging and may be used in compact heat-exchangers made of pipes and a housing which are applied at flying vehicles.
SUBSTANCE: the limiter of flow-over of the heat-carrying agent between pipes and the housing in the heat-exchanging apparatus is fulfilled in the form of radial bulkheads installed in parallel to the axis of the housing. The limiter has elements in the form of balls located between the housing, pipes and radial bulkheads, the diameter of elements exceeds the magnitude of gaps between pipes. At that mentioned elements are fulfilled out of polymeric materials.
EFFECT: the invention allows to improve heat-exchanging.
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.
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
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 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: 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