(57) Abstract:Usage: in air conditioning systems, mainly vehicles. The inventive cooler contains at least one multi-channel flat tube 1 with outer fins 2, is connected to the input and output manifolds 3, 4, respectively. Pipe 1 provided with a heat-generating element 6, which is placed in one of its channels 5, for example, on average, the pipe 1 may be provided with an additional heat-generating element 6, and thus fuel elements 6 are placed at the channels of the pipe 1, the outer wall of each extreme of the channel 5 of the tube 1 along its entire length can be performed longitudinal slot. 3 C.p. f-crystals, 4 Il. The invention relates to refrigeration and can be used in air conditioning systems, mainly vehicles.Known cooler, consisting of along the air flow sections, composed of parallel to each other in a number of plate fin and tube for refrigerant inserted in the above-mentioned ribs at right angles. Between sections made certain period, within which is placed testi evaporator frost (Japan's bid N 3-41749, CL F 25 B 47/02, F 25 D 21/08).However, this cooler has a low heat transfer capability due to the use of single-channel tubes, and therefore large dimensions compared to coolers, made of multi-channel flat tubes. The presence of a fuel element in this cooler increases the intensity of the process of thawing frost during its operation, however, when the above placement of the fuel element is sufficiently large thermal resistance between the surfaces of these elements, and heat exchanger tubes, resulting in increased electricity costs and time for defrosting frost.Known the cooler containing the coil in the form of multi-channel pascavale pipes connected to the input and output manifolds, provided with at least one mixer, common to all channels (ed. St. USSR N 1267133, CL F 25 B 39/02, 1986, B N 40). This cooler is compact, has a sufficiently high efficiency of heat transfer, but in the process of operation, if necessary, thawing of frost requires large expenditures of time and electricity to drive the compressor Widia, in such cases, produced by the discharge of the compressor in the cooler the hot steam of the refrigerant bypassing the condenser.The purpose of the invention to develop a compact cooler with high heat transfer capability, requiring a minimum investment of time and energy for defrosting the frost, and also easy to manufacture and convenient in operation, and reduced thermal resistance between the heat exchange surface and the frost when it is defrosting.The objective is achieved by the fact that in the cooler that contains at least one multi-channel flat tube with outer fins connected to the input and output manifolds, according to the invention, the said pipe is provided with a fuel element placed in one of its channels; fuel element is placed in the middle channel of the pipe; the multi-channel tube provided with an additional heat-generating element; and these fuel elements placed in its extreme channels in the outer wall at each channel of the pipe along its entire length is made a longitudinal slot.The presence of the fuel element, and its time is tyuleniy heat exchange between the surface and the frost when it is defrosting due to the direct heating surface of the pipe.During defrost the evaporator hot vapour refrigerant pumped by the compressor to the evaporator, bypassing the condenser, in the channels of the cooler is a heat exchange between the vapor and the wall of the pipe. The heat transfer coefficient of this heat transfer is small (about 50 W/m2K), and hence the component of thermal resistance of heat transfer between the vapor refrigerant and the frost on the outer fins very large. This ultimately leads to the need for additional time and electricity to drive the compressor.The placement of the fuel element directly in the channel of the multichannel tubes eliminates component convective heat transfer from vapor refrigerant, which reduces the total thermal resistance, which ultimately leads to the reduction of energy consumption and time defrost frost.By placing heat-generating element in the middle channel of the multichannel tubes in that case, if the latter is equipped with only one mentioned element, there is a uniform distribution of the heat flow from the latter in the transverse direction from the middle of the pipe to its edges, contributing to the implementation of time for defrosting frost.The supply pipe additional fuel element and placing each fuel element in one of its extreme feeds also promotes uniform distribution of the heat flux from the mentioned elements from each edge of the pipe to the middle of it, but due to the presence of additional fuel element amplifies the intensity of the heat flux, and consequently, the more reduced the time needed for defrosting frost.Execution of longitudinal slots in the outer wall of the outermost channels of the pipe increases the manufacturability of the air cooler, and increases the convenience of operation by facilitating the extraction of the fuel element from the channel and its installation in the last failure and the need for its replacement.In Fig.1 presents the cooler, made in the form of a coil; Fig. 2, a cooler, made a series of flat tubes United by a common inlet and outlet manifolds; Fig.3 pipe cooler with placement of the fuel element in the middle channel of the pipe, the cross section of Fig. 4 is the same, with slots in the outer walls of the extreme channels and two fuel EU in the form of a coil tube 1 (Fig.1) or multiple parallel one above the other rectangular multi-channel tube 1 (Fig.2), provided with an outer fins 2. Each pipe 1 is connected to input 3 and output 4 to collectors. The pipe 1 has a longitudinal channels 5, the average of which (Fig.3) or the two extreme (Fig.4) posted fuel elements 6, which are made in the form of a flexible electric heaters. For ease of installation and replacement of fuel elements in case of failure in the exterior walls of the extreme channels 5 of the pipe 1 along the entire length of the last executed longitudinal slits.The air cooler works as follows.The liquid refrigerant from the condenser of the refrigeration machine is choked in the control valve and enters through an inlet manifold 3 into the tube of the cooler 1. In the channels 5 of the pipe 1 is a refrigerant. The resulting steam through outlet 4 outlet absorbed by the compressor of the refrigeration machine. Passing the outer fins 2, the air is cooled, the surface of the fins is formed frost. Upon reaching a sufficiently large layer of frost, which reduces the efficiency of heat transfer, refrigeration compressor turns off and turns on the electric heater 6 is placed in one or two channels of the pipe. The surface of the pipe heats up quickly, frost thaws out and beats the ASS="ptx2">Thus, the present invention can significantly reduce electricity costs and time for defrosting frost during its operation. In addition, the installation of electric heaters directly into the channels of the multichannel tubes eliminates additional equipment that is required to enter into the scheme of the refrigeration machine in case of defrosting frost steam, namely, solenoid valves, steam piping, accumulator, which ultimately increases the reliability of the refrigeration machine. 1. The cooler that contains at least one multi-channel flat tube with outer fins connected to the input and output manifolds, characterized in that the said pipe is provided with a fuel element placed in one of its channels.2. The cooler under item 1, characterized in that the fuel element is placed in the middle channel of the said pipe.3. The cooler under item 1, characterized in that the said pipe is provided with additional fuel element, these elements are located in its extreme channels.4. The cooler under item 1 or 3, characterized in that Nar is
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