KR20000015590U - Unit plate of a parallel heat exchanger - Google Patents

Abstract

The present invention discloses an improvement of a component plate constituting a parallel heat exchanger.

In order to promote the heat exchange efficiency, the present invention improves the heat exchange efficiency by increasing the surface area of the flow path by forming the curved path ribs.

As a result, there is an effect of providing a heat exchanger capable of low fuel consumption and small size and light weight.

Description

Components of Parallel Heat Exchanger {UNIT PLATE OF A PARALLEL HEAT EXCHANGER}

The present invention relates to a single-type gas boiler system, and more particularly to a unit component plate constituting a parallel type heat exchanger in the plate heat exchanger used as the hot water heat exchanger.

A boiler is a device that provides heating or hot water by using heated water or steam generated by heating water. These boilers use a variety of fuels, and can be classified into instant heating type and low boiling type according to the heating characteristics of the fuel.

Low-boiling boilers heat water using briquettes or oil barrels and store them in hot water storage tanks to provide heating or hot water as needed. In contrast, instantaneous heating boilers may be provided with a main heat exchanger and / or a hot water heat exchanger in the boiler body to immediately supply heating or hot water if necessary. Gas boilers correspond to instantaneous heating boilers. Recently, the gas boilers are widely used as household heating boilers due to the widespread use of city gas and ease of use.

Gas boilers are also divided into single type and dual type according to the supply method of heating water and hot water, that is, the configuration of the heat exchanger. In the single-type system, the main heat exchanger performs only heat exchange of the heating water, and the hot water is heated using a separate secondary heat exchanger or a hot water heat exchanger using the heating water heated in the main heat exchanger.

On the other hand, the dual type system simultaneously heats the heating water and hot water in the main heat exchanger.

1 schematically shows a gas boiler system employing the above-described single method. In FIG. 1, a heat exchanger X is provided above burner B to heat the heating water. In an open system equipped with a supplementary tank (not shown), the circulating water supplied from the supplementary tank is preheated by circulating the preheating tube P installed at the outer circumference of the heat exchanger X, and then the heating tube inside the heat exchanger X Heated through (H), then heated via a three-way valve (V).

On the other hand, the downstream side of the three-sided (V) is connected to the secondary heat exchanger (X2) through the hot water heating tube (W), the secondary heat exchanger (X2) is a sandwich (sandwitch) of the heating water pipe and the direct water pipe Is crossing. When the user opens the hot water valve, the three-way valve (V) cuts off the supply to the heating pipe, converts the heating water heated in the heat exchanger (X) into the hot water heating pipe (W), and heats the direct water with hot water. Is returned to the heat exchanger (X) via the refill tank.

In such a single-type gas boiler system, a secondary heat exchanger (X2), that is, a conventional heat exchanger was mainly used as a hot water heat exchanger. However, in recent years, the plate heat exchanger illustrated in FIG. It is used.

In FIG. 2, one component plate U of the plate heat exchanger is formed with two through holes H1 and H2 at intervals of 90 °, and one through hole H2 is formed in the circular rib R3 to form another through hole H1. ) And a step by the height of the ribs R1 to R3 is formed.

When the plurality of component plates U having such a configuration are alternately stacked by 90 °, the through holes H2 in the circular ribs R3 of the component plates U have the through holes H1 of the component plates U above. ) And the component plates U constitute a plate heat exchanger in communication with each other. At this time, the inlet and the outlet on each path have a space of 180 °, and the circulating water flowing into the through hole H1, which is the inlet, flows through a complicated path in the space formed by the ribs, and then the circular rib of the upper component plate U. Through-hole H2 in R3 flows out to the downstream side of an upper layer or a lower layer as an exit.

As a result, the heat from the heat exchanger X introduced into the plate heat exchanger X and the direct water from the direct pipe are not mixed with each other, and are heat-exchanged and discharged as return water to the replenishment tank and hot water to the hot water pipe.

In such a heat exchanger, the path from the heated water to the return water and the path from the direct water to the hot water cross each other in complex but each has a single path. Therefore, such a heat exchanger is called a direct type.

However, since the series heat exchanger has a complicated path as described above, the pipe resistance is large and the pressure loss is large. Accordingly, the series heat exchanger has a problem that it is difficult to use in a low pressure range with low direct pressure and has a low heat exchange efficiency.

This problem of pressure loss prevents the supply of sufficient hot water, especially in the upper floors of low-rise apartments without direct pressure facilities, and it is easy for users to judge this problem as being caused by the boiler system, which greatly impairs the reliability of the boiler system. .

Accordingly, attempts have been made to reduce the size of parallel heat exchangers, which are mainly used for large-scale industrial boilers, and to use them as hot water heat exchangers for domestic gas boiler systems.

As shown in FIG. 3, the parallel heat exchanger includes two through-holes H1 and two through-holes H2 in the shielding rib R3 in each component plate U to enter the heated water inlet. One heated water is discharged to the return water outlet through a plurality of paths, and the direct water entering the direct inlet is also discharged to the hot water outlet through a plurality of paths.

Accordingly, the pipe resistance is greatly reduced compared to the series type, and the heat exchange efficiency is improved, thereby reducing the size of the heat exchanger.

Figure 4 shows an example of the actual configuration of such a parallel heat exchanger, which is a utility model registration application No. 95-39048 (parallel heat exchanger), 96-21854 (of heat exchanger) Nipple coupling structure) and design registration No. 212841 (heat transfer fin of heat exchanger).

The heat exchanger is composed of a stack of a plurality of component plates (U1 ~ U3), each component plate (U1 ~ U3) is basically composed of a rectangular bowl shape surrounded by a flange (F) bent its outer periphery Through-holes H (forming H1 or H2 depending on the arrangement) are formed at four corners, and shielding ribs R3 surround two through-holes H of the four through-holes H.

On the other hand, the body of the component plates (U1 ~ U3) is arranged in the form of fishbone (V-shaped path ribs R4) is separated between the direct water and hot water between the laminated plates (U1 ~ U3) The path V is formed.

Meanwhile, a nipple (N) is preferably coupled to the uppermost component plate (U3) for connection with an external pipe. For this purpose, a nipple (N) is formed around the through hole (H) of the uppermost component plate (U3). A sleeve S is formed to be in contact with the inside.

On the other hand, the through hole (H) is not formed in the lowermost component plate (U2) to shield the path.

In this case, all of the shielding ribs R3 and the ones having the same are indicated by the same component plate U1, which forms the shielding ribs R3 at one of the four through holes H or two of the diagonals. When the component plates U1 are stacked alternately in opposite directions, such a configuration can be obtained.

On the other hand, the component plates (U1 ~ U3) are configured by blanking the plate material by a series of progressive molds (forming) and forming (piercing). Accordingly, the U2 component plate is taken out before drilling the through hole H in the manufacturing process of the U1 component plate, and the U3 component plate is taken out during the expansion of the through hole H. U3) can be obtained from one progressive mold.

Each of the component plates U1 to U3 and the nipples N are coated or placed with a suitable bonding material such as a paste at the contact portion thereof, and laminated as shown in FIG. 4 (A), and then laminated to a brazing furnace. When input and heated, as shown in FIG. 4B, each of the component plates U1 to U3 and the nipples N are integrally joined to form a parallel plate heat exchanger. The configuration shown represents the direct inlet or hot water outlet side of this plate heat exchanger.

Figure 5 illustrates a component plate U1 constituting the body of such a heat exchanger, which is in particular according to the aforementioned design registration No. 212841.

As described above, the component plate U1 forms a through-hole H at four corners and a shielding rib R3 at two diagonal through-holes H, and has a directional rib in between. (R4) is formed and stacked alternately in the opposite direction as shown in Fig. 4 (A), (B), the heat exchange in which the direct and hot water path and the heating water and return path are separated as shown in FIG. The group can be configured.

Such pre-registered designs of the present inventors have two protruding ribs R3 in the diagonal direction of the four through holes H in the conventional fishbone-type structural plates U1 to U3 having a simple V-shaped path rib R4. It is possible to manufacture a plate heat exchanger by alternating stacking of a single type of component plates (U1 to U3), and the heat exchanged by arranging guide ribs (R1, R2) around the through hole (H). It is configured to induce the movement between floors smoothly.

Here, the flow of the water of the heated water-returned water and the direct water-hot water flows in a turbulent state because the flow path is complicated as will be described later. This heat exchange efficiency is mainly determined by the surface area of the flow path.

Based on these considerations, an object of the present invention is to provide a component plate of a parallel heat exchanger capable of significantly improving heat exchange efficiency.

1 is a system diagram of a single gas boiler using a plate heat exchanger.

Figure 2 is a schematic cross-sectional view showing the purification of the in-line heat exchanger of the plate heat exchanger.

Figure 3 is a schematic cross-sectional view showing the circulation of the parallel heat exchanger.

4 is a view showing an example of the actual configuration of a parallel heat exchanger, (A) is an exploded state. (B) is a cross-sectional view of the assembled state.

FIG. 5 is a perspective view showing a configuration of a pre-registered design 212841 of the present application as an example of the component plate of FIG. 4. FIG.

Figure 6 is a perspective view showing the configuration of the present invention.

7 (A) and (B) are path diagrams of hot water comparing the action of the pre-registered chairman and the component plate of the present application.

<Explanation of symbols for main parts of drawing>

1: construction plate (of heat exchanger)

H; H1.H2: Through hole (of component board)

R1.R2: guide rib

R3: Shielded Rib

4: Path rib

P: flow path

In order to achieve the above object, the component plate according to the present invention is characterized in that the path ribs arranged to form a V-shape as a whole is bent to form a wave (wave).

Accordingly, the surface area of the flow paths formed between the respective component plates is significantly increased, and thus, the heat exchange efficiency can be remarkably improved.

As a result, the present invention provides a parallel heat exchanger having a low fuel consumption and a small size.

Such specific features and advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

In FIGS. 6 and 7, the component plate 1 according to the present invention is formed in a substantially long direction so that through holes H; H1 and H2 are formed at four corners, and two through holes H in a diagonal direction. When the shielding rib R3 is formed in and overlaps the component plates 1 with each other, the flow paths of the heating water return water and the direct water hot water are alternately formed. Symbols R 1 and R 2 are induction ribs which respectively promote the flow of water between the layers.

In such a configuration, the path ribs 4 are arranged in a substantially V-shape, that is, in the form of a fishbone, as in the prior art, and each path rib 4 is bent into a waveform according to the present invention.

Here, the path ribs 4 are formed by deep drawing molding a blank of the component plate 1 together with other bent portions by means of a mold, which is formed by forming in the uniaxial direction. Even if the bend waveform is complex, there is no manufacturing problem.

As described above, the component plates 1 having the curved wave ribs 4 are alternately stacked in the opposite directions as shown in FIG. 8 and then bonded to each other to form a heat exchanger. Here, the bonding method may be performed by a brazing bonding method in which a thin plate of a thin copper-based bonding material is laminated between the component plates 1 and then charged and heated in a high temperature bonding furnace.

In order to explain the functions and effects of the inventive heat exchanger configured as described above, FIG. 9 is shown in comparison with the flow path by the conventional component plate (U).

9 (A) and (B) show only one of the flow paths of both the hot water-returned water or the hot water-hot water, and the other flow path is the component plate 1 for the path shown. ) Is bounded by and becomes the form which meshes with each other.

First, shown in FIG. 9 (A) is a flow path P 'by the filing application and registration proposal of FIG. 5, which flow path P' is arranged on the path ribs R4 of the component plate U which are alternately arranged. When viewed from the top to form a lattice (lattice) to cross each other, three-dimensionally viewed the upper path (P1) of the trapezoidal cross section inclined to one side and the lower path (P2) of the inverted trapezoidal cross section inclined to the other side at each other Intersect in the form of communication.

As such, the flow path P 'is complicated, so that the flowing water flows into the turbulent state, and thus, the possibility of promoting heat exchange efficiency by the change of the flow state such as the acceleration of turbulence is low.

In comparison with this, the flow path P according to the present invention shown in FIG. 9 (B) is similar to the conventional configuration of FIG. 9A in its basic form, but the flow path (B) by the wave bend of the path rib 4 A bend is formed on the surface of P).

As a result, the surface area of the flow path P is greatly increased as compared with the related art, and consequently, the turbulence of the flow is further increased, and as a result, the heat exchange efficiency is greatly improved.

According to the development test of the applicant conducted in the configuration step of the present application, in the case of the heat exchanger constituted by the structural plate 1 of the present invention, the heat exchange efficiency of 10% compared to the heat exchanger by the pre-application and the registration structural plate (U) of FIG. Improvements were recorded.

These results indicate that the present invention not only can reduce fuel consumption by 10% in a gas boiler or the like, but also can reduce the size of the heat exchanger by 10% compared with the conventional heating capacity.

Therefore, the present invention has an effect of improving the heat exchange efficiency, thereby reducing the size and weight of the heat exchanger and reducing the fuel consumption rate, and is particularly suitable for use in domestic gas boilers.

Claims (1)

In the component plate constituting a parallel heat exchanger is a plurality of V-shaped ribs are arranged and stacked in plurality to alternately form a flow path of hot water-return water and hot water-hot water, Parallel path heat exchanger component plate, characterized in that the path ribs (4) are bent in a wave form.