UA110292C2 - Cooling radiator with liquid cooling - Google Patents

Abstract

The invention relates to a cooling radiator (1), which includes the upper (2) and lower (3) manifolds, as well as at least one module (4) of the cooling elements connected via the respective separate distribution pipes (5) with the upper and , respectively, the lower collectors (2, 3), and the modules (4) contain pipes (6), provided on their outer side respectively by the ribs (7), characterized in that the modules (4) are located perpendicular and transverse to the longitudinal direction of the collectors ( 2, 3), for the passage of air pipe (6) modules (4) of the solution stitched in parallel at a distance (22) from each other.

Description

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1. The field of technology

The invention relates to a cooling radiator, in particular a cooling radiator of the tank of the active part of the transformer, and the cooling radiator is made with cooling elements that flow around the heated active part with a cooling liquid due to the force of gravity from above along the collector or distribution pipe, the so-called collector, down to the lower distributor, the so-called the lower collector, and the cooled liquid through the lower distributor flows back into the transformer, and at least one cooling radiator is located at a distance from or directly on the transformer or its tank.

Cooling radiators of this kind include, in addition to the upper and lower collectors, at least one module of cooling elements, which are connected by means of appropriate separate distribution pipes to the upper and lower collectors, and the modules contain pipes equipped on their outer side with ribs. 2. Level of technology

Cooling elements of transformers or other electrical devices consist of flat ones that are wrapped around, as a rule, oil as a cooling liquid of cooling elements or of corrugated sheet, as is known from OE 102009015377 A. Cooling radiators consisting of several such stacked or arranged in a row/one by one of the cooling elements, made in the form of a welded structure. To increase the service life, they are varnished or subjected to hot-dip galvanizing due to complex immersions.

Compared to this, at the same time gas- or oil-tight connection of cooling elements with collectors should be simplified manufacturing and, in particular, improved heat transfer or heat transfer. 3. The task of the invention

The task of the invention is to create a cooling radiator, which, on the one hand, would have a simple design, and, on the other hand, would provide increased heat transfer with its same external dimensions. This problem is solved, according to the 3rd invention, with the help of a cooling radiator with the features of clause 1 of the formula. Preferred variants of the invention are set forth in the dependent clauses of the claims.

From 4. The essence of the invention

According to the invention, the modules are located perpendicularly and across the longitudinal direction of the collectors, and the pipes of the modules for the passage of air are located at a distance parallel to each other. Due to this, a cooling radiator was created, which, from several that go one after the other in a row and with an air gap from each other, being placed in the holes of the upper and lower collectors, ensures particularly good passage of air through itself and on the corresponding cooling elements.

Thus, all cooling elements of the cooling radiator contribute to the heat transfer from the cooling medium, mainly oil, which flows through the cooling radiator, to the surrounding air, which flows around the cooling radiator, to the same extent. As a result, a cooling radiator with a width of up to 540 mm, preferably up to 520 mm, and a height of up to 2 m, preferably up to 1.80 m, provides a particularly high energy dissipation of up to 38.00 kWh, preferably up to 39.80 kWh. A cooling radiator with a height of 0.5-3.60 m is preferred. In the case of optimized cross-sections of the upper and lower collectors, as well as module pipes, oil consumption through the cooling radiator can be achieved up to 2700 kg/h, preferably up to 2800 kg/h.

Tests have shown that fluid, particularly oil flowing from top to bottom with the best cooling effect, is subjected to the least resistance if the optimized cross-section of the cooling radiator elements is maintained. Since there are only minimal possible resistances, the system can operate in free convection; no pumps are needed.

Thus, the cooling radiator has the form of a compact assembly, which consists of an arbitrary number of modules located at a distance from each other, connected by means of separate distribution pipes to the collectors. The cooling radiator as a whole or its modules can be completely surrounded by ambient air in transverse and longitudinal directions, if necessary, with the support of fans. Cooling or heat dissipation/heat transfer becomes very efficient due to this.

In one preferred embodiment, it is proposed that the pipes and manifolds, preferably the upper and lower manifolds, as well as individual distribution pipes, consist of a material processed by extrusion, such as, in particular, aluminum or aluminum alloys, magnesium, or the like, suitable for extrusion pressing of light metals. These materials have, on the one hand, good heat transfer properties, and, on the other hand, are corrosion resistant due to oxide layers,

which are formed so that varnishing or similar coating or surface treatment may not be required, and moreover are easily amenable to extrusion, and most preferably with the required arbitrary geometry.

The holes necessary for the connection of individual components of the cooling radiator are precisely manufactured mainly by milling or laser processing, so that the places of precise micro-connections are achieved mainly by laser welding with a gas- or oil-tight connection.

Preferably, if each module includes up to 12, preferably up to 10 pipes. Due to this, a cooling radiator was created, the active surface of which, streamlined, if necessary, completely with the surrounding air, with the help of particularly simple means is adapted to the properties required by the cooling radiator.

In this regard, it is also preferable if the pipes of the corresponding modules have a flattened, preferably rectangular section, in particular a rectangular section with rounded corners. Especially preferably, if such pipes have at least one internal jumper, preferably two internal jumpers. At the same time, the width of the pipes is preferably up to 130 mm, preferably up to 120 mm. In particular, preferably, if the distance between the pipes of each module is up to 30 mm, preferably up to 27 mm. Due to this, a cooling radiator was created, which, on the one hand, ensures sufficient flow of cooling media, such as oil, through the pipes of each module, and on the other hand, contains pipes of sufficient dimensional stability. Finally, due to the selection of a sufficient distance between the pipes, there is an optimal passage of air through the cooling radiator, which allows to optimize the cooling capacity.

In addition, preferably, if the ribs provided on the outside of the pipes are longitudinal ribs, which pass mainly along the entire length of the pipes, that is, along the entire length of the cooling radiator. In particular, it is preferable if up to 15, especially preferably up to 12 longitudinal ribs are provided for each pipe. In this regard, in particular, preferably, if the longitudinal ribs have a height, that is, the length from the outer side of the pipes to the outside, up to 15 mm, preferably up to 12 mm. The distance between the longitudinal ribs should be up to 25 mm, preferably up to 20 mm, in order to create not only an active surface for a cooling radiator with high heat radiation, but also simultaneously optimize

There is also the transfer of heat from the cooling medium to the flow-through cooling radiator and the ambient air that flows through it.

In another version, preferably, if up to 10, preferably up to 8 modules are provided in the cooling radiator. These modules, connected to each other by separate upper and lower distribution pipes, thereby provide a particularly large active surface with a simultaneously compact design of the cooling radiator.

In this regard, it is also preferable if at least the upper collector, preferably also the lower collector, has a rectangular section, preferably 20x80 mm. In addition, preferably, if at least the upper collector, preferably the upper and lower collectors, are located at one end of separate distribution pipes and, thereby, do not interfere with the flow of air flowing, in particular, from the bottom up through the cooling radiator along the modules. Only due to the location of the upper collector at a distance from the middle of the separate distribution pipes at their end, it was possible to achieve an improved 38 95 air inflow to the cooling radiator and air exit from it.

One preferred option involves a pre-fabricated cooling radiator design in which the upper and lower headers are longitudinally arranged and, viewed lengthwise, have any number of holes spaced one after the other, and in the case of oval tubes as a cooling element, corresponding to shape, elongated holes are made across the longitudinal length. The cooling elements are connected to the module in the holes connected to the upper and lower collectors of separate distribution pipes, which, like the collectors, have the shape of a rectangle or a square. Modules consisting of upper and lower separate distributors with connected cooling elements, their separate distribution pipes, passing across the collectors and being one of their openings in flow connection with the opening of the collectors, are oil-tightly connected to them, preferably laser welded , namely: in such a way that the collectors overlap the modules located across them, either in the middle, or preferably with an offset to the side and to the ends of individual distribution pipes. 5. Brief description of drawings

The invention is explained in more detail below with reference to the drawings showing preferred embodiments of the invention. The drawings show: 60 Fig. 1 - front view of the cooling radiator;

Fig. 2 - a view from the end of the cooling radiator from Fig. 1;

Fig. C is a top view of the cooling radiator from Fig. 1 and 2;

Fig. 4 - a separate distribution pipe for the cooling radiator;

Fig. 5 - section of the collector of the cooling radiator;

Fig. 6 - cross-section of the pipe of the module in the first version;

Fig. 7 - cross-section of the pipe of the module in the second version;

Fig. 8 - perspective view of the cooling radiator from top to bottom.

Detailed description of drawings

In Fig. 1 shows the front view of the pre-assembled cooling radiator 1, prepared for installation on the transformer and dismantling from it. The radiator 1 includes the upper 2 and lower C collectors, which can be connected to the transformer (not shown) with the help of the corresponding flanges 2a, 3a to form a closed oil circuit with it. A large number of modules 4 are connected between the upper 2 and lower Z collectors, which pass respectively perpendicular to and across the longitudinal extent of the collectors 2, Z in the plane of the drawing. Modules 4, in turn, are provided with separate distribution pipes 5, which are watertightly connected to collectors 2, C and the pipes of modules 4, thereby ensuring the passage of a cooling medium, such as oil, through the entire radiator 1. Finally, with the collectors 2, Sensors 20, 21 are connected to C to measure the flow rate, as well as the inlet and outlet temperatures of the cooling medium through the radiator 1.

In Fig. 2 radiator 1 from Fig. 1 is shown in a side view, thereby allowing to see the front or first module 4. Multiple, sequentially spaced modules 4, connected to the collectors 2, 3, form the radiator 1 of Fig. 1. Having considered together

Fig. 1 and 2, it can be stated that the radiator 1 and its modules 4 or elements made in this example in the form of oval pipes 6 (Fig. b) can be completely surrounded by ambient air.

Heated coolant (oil) coming from the consumer along the upper arrow in Fig. 1, is particularly effectively cooled by this on its way down. There, the coolant flows along the lower arrow back to the consumer (the tank is the active part of the transformer). The radiator can be connected to the consumer, if necessary, with the help of pipelines, with the help of flanges 2a, for collectors 2, 3.

From Fig. With radiator 1 from Fig. 1 and 2 is shown in a top view. Modules 4 with cooling elements located in separate distribution pipes 5 are located across and perpendicular to the upper collector 2 and covered by it in the middle of the modules 4. Each module 4 consists of five pipes 6 connected by one common separate distribution pipe 5, mainly rectangular section A distance 22 is provided between the pipes 6 for the passage of cooling air through the corresponding modules 4.

In Fig. 4, as a detail, a separate distribution pipe 5 is shown on its side with holes 23.

A watertight and gastight connection of a separate distribution pipe 5 with pipes (not shown) for the passage of the cooling medium passes through them.

In Fig. 5 shows a detail of the collector 2 from its side with holes 24. Through them there is a connection and a water- and gas-tight welding of the collector 2 with separate distribution pipes 5 (not shown).

In Fig. 6 shows a cross-section of pipe 6, mainly of rectangular cross-section and with rounded corners. On the outer side of the pipe b, however, at least on its longitudinal sides, longitudinal ribs 7 are equidistantly located, which significantly increase the active surface of the pipe 6, i.e. the contact surface of the pipe 6 with the surrounding air that flows around it. To stabilize the pipe 6, an internal bridge 8 is located inside it.

In Fig. 7 shows the second version of pipe b as part of the cooling radiator module. The pipe 6 has, basically, a rectangular section with rounded corners, and on each longitudinal side of the pipe there are cooling ribs 7 at the same distance from each other. Also, their height, that is, their length from the outer side of the pipe 6 to the outside, is the same along the entire periphery of the pipe 6 to ensure, due to this, the same conditions of heat transfer through it. Internal jumpers 8a, 86 are provided to stabilize the pipe 6 and to divide its cross-section into three basically identical chambers, which run along the entire length of the pipe 6.

In Fig. 8 shows a general perspective view of the cooling radiator 1 from top to bottom. It contains the upper 2 and lower C radiators, which connect eight separate distribution pipes 5.

The latter are connected, in turn, to seven pipes 6, along the entire length of which longitudinal ribs 7 pass. In order to ensure, mainly, the unhindered passage of cooling air through the radiator 1, the collectors 2, C are located with an offset from the middle position on separate distribution pipes 5 (fig. C) to their ends. because List of reference positions

1 - cooling radiator 2 - upper collector 2a - flange

C is the lower collector

Za - rlanets 4 - module 5 - separate distribution pipe b - pipe 7 - longitudinal ribs 8 - internal bridge 20 - measuring sensor 21 - measuring sensor 22 - distance between pipes 23 - hole in a separate distribution pipe 24 - hole in the collector

Claims (17)

FORMULA OF THE INVENTION 1. Cooling radiator (1), which includes an upper collector (2) and a lower collector (3), as well as at least one module (4) of cooling elements connected by means of appropriate separate distribution pipes (5) to the upper and, accordingly, the lower collectors (2, 3), and the modules (4) contain pipes (6), equipped on their outer side with ribs (7), which is characterized by the fact that the modules (4) are located perpendicular to and across the longitudinal direction collectors (2, 3), while for air passage, pipes (6) of modules (4) are located parallel at a distance (22) from each other. 2. The radiator according to claim 1, which is characterized by the fact that at least the pipes (6) of the modules (4) are made of aluminum or an aluminum alloy. C. The radiator according to one of the previous items, which is characterized by the fact that each module (4) contains up to 12, preferably up to 10 pipes (6). Zo 4. The radiator according to one of the preceding points, which is characterized by the fact that the pipes (6) of the modules (4) have a flattened, mostly rectangular section, in particular with rounded corners. 5. The radiator according to one of the previous points, which is characterized by the fact that the pipes (b) have at least one internal bridge (8), preferably two internal bridges (8). b. The radiator according to one of the preceding points, which is characterized by the fact that the width of the pipes (6) is up to 130 mm, preferably 120 mm. 7. The radiator according to one of the previous items, which is characterized by the fact that the distance between the pipes (6) of each module (4) is up to 30 mm, preferably up to 27 mm. 8. The radiator according to one of the previous items, which is characterized in that the pipes (6) contain longitudinal ribs (7), preferably up to 15, especially preferably up to 12 longitudinal ribs (7). 9. The radiator according to claim 8, which is characterized by the fact that the longitudinal ribs (7) have a height of up to 15 mm, preferably up to 12 mm. 10. The radiator according to one of claims 8 or 9, which differs in that the distance between the longitudinal ribs (7) is up to 25 mm, preferably up to 20 mm. 11. The radiator according to one of the previous items, which differs in that it provides up to 10, preferably up to 8 modules (4). 12. The radiator according to one of the previous items, which is distinguished by the fact that its width is up to 540 mm, preferably up to 520 mm. 13. The radiator according to one of the previous items, which differs in that its height is 0.5-3.60 m, preferably up to 2.00 m. 14. A radiator according to one of the previous items, which is characterized by the fact that the oil consumption through it is up to 2700 kg/h, preferably up to 2800 kg/h. 15. The radiator according to one of the previous items, characterized in that the energy removal through it is up to 38.00 kWh, preferably up to 39.80 kWh. 16. The radiator according to one of the previous items, which is characterized by the fact that at least the upper collector (2) has a rectangular section, preferably 20x80 mm in size. 17. The radiator according to one of the preceding points, which is characterized in that at least the upper collector (2), preferably the upper collector (2) and the lower collector (3), are located at one end of separate distribution pipes (5).