Package plate heat exchanger

 

(57) Abstract:

The invention can be used in ventilation systems and air conditioning for the heat exchange between the supply air and exhaust air. The package is assembled from plates to ensure traffic flows environments, similar to the counter, have the shape of a convex quadrilateral such a configuration, in which the straight lines drawn through the middle of its opposite sides are not perpendicular to each other. Plates stacked on top of each other to form between facing each other with the surfaces alternating between the channels for production environments. Channels are limited on the other two sides opposite each other by the walls adjacent to the opposite sides of the rectangle of each of two adjacent plates. The wall bounding one of the two adjacent channels adjacent to said sides of one pair located opposite each other of the sides of the rectangle and the bounding another channel to the sides of the other pair of its opposite sides. This embodiment of the heat exchanger enables transfer of heat from one working environment to another when povodok while maintaining this low hydraulic resistance to the flow of working medium and full use of the heat transfer surface. 4 C.p. f-crystals, 5 Il.

The invention relates to heat-exchange equipment, implements the exchange of thermal energy between the two working environments through the wall, and can be used in ventilation systems and air conditioning for the heat exchange between the supply air and exhaust air.

Known plate heat exchanger package with folding plates used in the heat exchanger for U.S. patent N 5029639 (IPC F 28 D 9/00). This package consists of separate plates hexagonal shape. Two opposite sides of each plate is provided with walls which serve to guide the movement of the working environments, equipped with four other limb, the opposite of which are bent in opposite directions at the 90oand are used to organize input, output and distribution environments through appropriate channels. This device provides a high temperature lift between work environments through the implementation of their mutual motion on the most effective "counter-current", which results in a slight increase in the amount of heat transferred from one working environment to another in comparison with other schemes movement ceteris paribus. However, th drastic changes in the cross-section of the channel width and the formation of closed vortices in the detachment zone of the fluid flow during rotation. This leads to increased hydraulic resistance to the flow of working environments and reduce effectively used for the heat exchange surface, and the latter, in turn, reduces the amount of transferred heat. The manufacturability of such a package is reduced due to the necessity of its Assembly of individual plates rather complicated form.

Also known package of plates used in the heat exchanger on the application Germany N 4142177 (IPC F 28 F 3/02). This package consists of separate plates having the shape of a rectangle. For the formation of channels between every two adjacent plates placed placed opposite each other on the two l-shaped in plan wall adjacent its elongated areas along the entire length of the large sides of the plates, and shorter - half length located opposite each other their smaller sides. In each subsequent channel mentioned walls are mirrored location relative to the previous one. Input media channels devices are installed for uniform flow distribution of the working environments across the width of the plate. Thus, in the described package is a counter-current flow of the working media, blogeee increase the amount of heat transferred from one working environment to another in comparison with other schemes movement ceteris paribus. However, due to sudden changes in the channel cross section width and despite a device for uniform flow distribution in the channels formed zones of closed vortices, which leads to underutilization of the heat transfer surface, and hence to reduce the number of transferred heat. Change the width of the channels and devices for distribution environments increase the hydraulic resistance to flow of the working media. In addition, the adaptability of this design is reduced due to the fact that the package is assembled from separate plates and must be installed in each channel devices for uniform flow distribution.

Closest to the claimed package is the package plate heat exchanger according to the U.S. patent N 5072790 (IPC F 28 F 3/08) containing a set of plates having the shape of a square and stacked on top of each other to form between facing each other with the surfaces of adjacent plates alternating between the channels for production environments. These channels are limited on the other two sides facing each other of the walls, prima is providing one of the two adjacent channels, adjacent to said sides of one pair are located at opposite sides of the square, and the bounding another channel to the sides of the other pair of opposite sides. Wall of the described package is made in one piece with the plates made of rigid sheet material. This package plate heat exchanger has a low hydraulic resistance by providing rectilinear movement of the working media in the channels and the lack of zones of vortex formation; the latter also promotes proper use of a heat-transfer surface. However, this package provides the low temperature pressure between environments compared with a scheme of "counterflow", because it carries reciprocal movement of the working media are perpendicular to each other in the plane of the plate, i.e. on a "cross-talk", which, in turn, leads to a decrease in the quantity of heat transferred from one working environment to another.

The invention solves the problem of secure transmission of heat from one working environment to another at a raised temperature head between them due to the approximation of the mutual flow of working medium to the d and full use of the heat transfer surface.

To achieve this, the technical result in the package plate heat exchanger, containing a set of plates having the shape of a convex quadrilateral and stacked on top of each other to form between facing each other with the surfaces of adjacent plates alternating between the channels for production environments, bounded on the other two sides facing each other of the walls adjacent to the opposite sides of the rectangle of each of two adjacent plates, and these walls bounding one of the two adjacent channels adjacent to said sides of one pair are located at opposite sides of the quadrilateral, and limiting other channel - mentioned sides of the other pair of opposite sides, according to the invention, the quadrilateral has such a configuration in which the straight lines drawn through the middle of its opposite sides are not perpendicular to each other.

The execution of a plate in the form of a quadrangle such a configuration, in which the straight lines drawn through the middle of its opposite sides are not perpendicular to each other due to the fact that these straight lines are parallel to the directions of p is. close to the scheme of movement of the working environments "backflow". This quality provides a high temperature pressure between environments compared to the cross-shock, ceteris paribus, which in turn provides an increase in the amount of heat transferred from one working environment to another in comparison with the cross-current. This lack of turns and abrupt contractions and expansions of channels contributes to the preservation of qualities such as low hydraulic resistance to the flow of working medium and full use of a heat-transfer surface due to the absence of the vortex.

A special case of the implementation of the package plate heat exchanger is the implementation of a quadrangular plate of such configuration that the specified quadrilateral symmetrical with respect to one of its diagonals. Such execution, ensuring the achievement of the technical result, at the same time contributes to increased manufacturability of the package due to the ease of manufacture of the plates, because this simplifies cutting and cutting sheet material from which they are made (in the manufacture of a few plates by determining the relative position of the plates.

More optimal special case of the implementation of the package plate heat exchanger is the implementation of the rectangular plate in the form of a rhombus, i.e., equal to each other and pairs of parallel opposite sides of the quadrilateral. This embodiment also ensures the achievement of the technical result, while helping to even more high-tech due to the greater ease of manufacture of the plates, since simplifies and accelerates cutting and cutting sheet material from which they are made (in the manufacture of a few plates), due to the adhesion of workpiece plates to each other. In addition, it simplifies the Assembly of the package of plates, because faster is determined by their mutual arrangement thus reduces the complexity of manufacturing the package. This form of the plates also has a positive effect on the reduction of hydraulic resistance, because it provides a uniform rectilinear motion of the flow in the channel.

Even more optimal special case of the implementation of the package plate heat exchanger is one in which the value of the larger angle between the straight lines drawn through the middle of p is e 110omutual flows only marginally different from the movement in the scheme "cross-talk" and does not lead to a noticeable increase in temperature difference between work environments, and hence to a marked increase in the quantity of heat transferred from one working environment to another. Increasing the angle more than 160oleads to multiple excess of one linear dimension of the plate above the other, which entails an increase in the complexity of operations with such plates. In addition, excessive growth of the size of the heat exchanger package of plates specified angle which exceeds 160othat leads to a substantial increase of the hydraulic resistance to flow of the working media.

The manufacture of laminations from a sheet of polymeric material of cellular structure contributes to further increase the manufacturability of the package, because it allows one to reduce the need for cutting and the cutting plates and the Assembly of them in the package. In addition, the presence between adjacent plates jumpers, passing parallel to the flow, leads to increased heat transfer surface area between environments, which also provides an increased amount of heat transferred from one working environment to another.

In Fig. 1,3,5 shows the General types of plate heat exchanger package with different options perform plates, Fig. 2 is a view of the plate in plan, corresponding to the execution of the package of Fig. 1, and Fig. 4 is a corresponding execution of the package of Fig. 3.

The plate heat exchanger package contains a set of plates 1 having the shape of a convex quadrilateral, having a plan such a configuration, in which the straight lines drawn through the middle of its opposite sides (lines cd and ef in Fig. 2,4), not perpendicular to each other. Plates stacked on top of each other to form between facing each other with their surfaces alternating between the channels 2 for production environments, and on the other two sides referred to the limited channels facing each other with walls 3 adjacent to the opposite sides of the rectangle of each of two adjacent plates. The wall bounding one of the two adjacent channels adjacent to said sides of one pair are located at opposite sides of the rectangle and the bounding another channel to the sides of the other pair of its opposite sides. To increase techno is and the above-mentioned configuration, comply with additional conditions under which the quadrilateral symmetrical with respect to one of its diagonals, for example the diagonal ab (Fig. 2). The most optimal form of the plate 1 is such that when the quadrangle is in the shape of a rhombus (Fig. 3,4 and 5). To ensure movement of the working media in the channels 2, approaching the counter, the plates are made so that the value of the larger angle between the straight lines cd and ef (Fig. 2 and 4), drawn through the middle of the opposite sides of the above-mentioned quadrangle, is, for example, 115o(Fig. 2) or 130o(Fig. 4).

Plate 1 can be made of sheet material, such as galvanized steel (Fig. 1). However, to increase the area of heat transfer surface is the most appropriate execution of plates made of polymer material of honeycomb structure, which can be used, for example, polycarbonate honeycomb structure (Fig. 3 and 5). For the formation of channels 2 plate 1 distanceunits from each other with walls 3, which may be performed, for example, in one piece with the plate 1 in the form of bends on one of the pairs of opposite sides of each of R to them along these opposite sides of a quadrilateral with rivets (not shown). When performing a wafer 1 made of polycarbonate panels (Fig. 3 and 5) to form channels for one of the working environments of the wall 3 in one of the variants (Fig. 3) can be made in the form of inserts, made, for example, from polycarbonate, and attached to the plates by means of glue, and alternating with them channels for different working environment as walls 3 can be used jumpers available in polycarbonate honeycomb structure. In another embodiment (Fig. 5) when carrying plates of polycarbonate panels for the formation of alternating between the channels 2 for both working environments plate 1 distanceunits from each other using the above-mentioned panels, lintels, the extreme of which is a wall 3.

Package plate heat exchanger operates as follows. The package is installed in the housing of the heat exchanger (not shown) provided with connections for supply and discharge of working medium to the package accordingly. The flow of working medium, the first of which is, for example, supply air, and the second, for example, exhaust air, under the action of the pressure generated by the blower (not shown), or otherwise received through the respective nozzles is Tenkai 3, is the transfer of heat through the plate from the more hot exhaust air to the cooler inlet, and this process scheme, similar to the scheme "counter-current", i.e. with a high temperature pressure between environments that provides increased compared with the cross flow temperature pressure between environments and leads to an increase in the quantity of heat transferred from exhaust air to supply air. This lack of turns and abrupt contractions and expansions of channels 2 contributes to the preservation of such qualities of service as a reduced hydraulic resistance to the flow of working medium and full use of a heat-transfer surface due to the absence of the vortex. In case of fulfillment of plates made of polycarbonate panels transfer of heat occurs through the heat transfer surface area of which is increased due to the presence of jumpers between the plates, available in the honeycomb structure. It also has a positive effect on increasing the amount of heat transferred from exhaust air to supply air. When the movement of these air flows through the channels 2 formed by the plates 1 having the shape of a rhombus, going on nominee rectilinear motion in 2 channels.

After completion of the process of heat transfer in the channels of the supply air and exhaust air out of the housing of the heat exchanger through the respective nozzles.

1. Package plate heat exchanger, containing a set of plates having the shape of a convex quadrilateral, stacked on top of each other to form between facing each other with the surfaces of adjacent plates alternating between the channels for production environments, bounded on the other two sides facing each other of the walls adjacent to the opposite sides of the rectangle of each of two adjacent plates, and these walls bounding one of the two adjacent channels adjacent to said sides of one pair located opposite each other of the sides of the quadrangle, and the other of said sides, the other pair of opposite sides, characterized in that what quadrilateral has such a configuration in which the straight lines drawn through the middle of its opposite sides are not perpendicular to each other.

2. The package p. 1, characterized in that the quadrilateral symmetrical with respect to one of its diagonals.

3. The package p. 1, characterized in that chetyrekh is between straight lines, drawn through the middle of the opposite sides of the quadrangle, is 110 - 160.

5. The package according to any one of paragraphs.1 to 4, characterized in that the plates are made of a polymeric material of cellular structure.

 

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