RU221288U1 - Plate heat exchanger - Google Patents

Abstract

The utility model relates to heat exchangers, namely plate-type heat exchangers with turbulators for liquid cooling, installed, in particular, on an internal combustion engine for oil cooling. The plate heat exchanger contains at least one section consisting of a pair of elongated plates and a core. The oblong plates are fastened along the perimeter and spaced from each other to form a liquid flow channel. The plates have inlet and outlet holes to set the direction of fluid flow. The core is located between the plates in the path of fluid flow, and is a corrugated metal sheet, while the corrugations of the core are in contact with the elongated plates. There are holes in the walls of the corrugations, and the walls of the corrugations between the holes are made at an angle to the fluid flow. Protrusions are molded into the oblong plates. 1 salary f-ly, 6 ill.

Description

The utility model relates to heat exchangers, namely plate-type heat exchangers with turbulators for liquid cooling, installed, in particular, on an internal combustion engine for oil cooling.

It is known from the prior art that plate heat exchangers have at least one pair of spaced apart plates connected to each other at the edges. Each pair of plates forms a fluid flow channel having an inlet and an outlet. To increase heat transfer in the fluid flow channel, a core is installed between the plates to increase turbulence in the fluid flowing through the channel.

The heat exchanger design of US Patent No. 10408543 is known, in which a preferred example of a core is a plate of thin metal sheet in which corrugations are molded. The walls of the corrugations have holes and offset ribs to ensure increased flow turbulence. However, when the corrugations are located along the fluid flow, the holes in the corrugations and displaced fins cannot always provide the required turbulence, and the thermal power of the heat exchanger may be insufficient. When the corrugations are located across the flow, the hydraulic resistance increases, which can lead to depressurization of the channel.

The closest analogue of the proposed heat exchanger is a liquid-oil heat exchanger according to US patent No. 4945981, containing a pair of elongated plates fastened at the edges and spaced from each other to form an oil flow channel, while the plates have inlet and outlet holes to set the direction of oil flow and oil a core disposed between the plates that contacts the plates and is in the path of oil flow to transfer heat from the oil to the plates, consisting of a corrugated metal sheet having a plurality of substantially flat ribs arranged side by side and connected at bends, the bends providing thermal contact with the plates, and many notches in each fin to create turbulence in the oil flow. However, cuts in the fins cannot always provide the required turbulence, and the thermal power of the heat exchanger may be insufficient.

The problem to be solved by the claimed utility model is efficient liquid cooling.

The technical result is to increase the energy efficiency of heat exchange and thus provide the required thermal power of the heat exchanger.

The problem is solved by a plate heat exchanger containing at least one section consisting of a pair of elongated plates and a core. The oblong plates are fastened along the perimeter and spaced from each other to form a liquid flow channel. The plates have inlet and outlet holes to set the direction of fluid flow. The core is located between the plates in the path of fluid flow and is a corrugated metal sheet, while the corrugations of the core are in contact with the elongated plates. There are holes in the walls of the corrugations, and the walls of the corrugations between the holes are made at an angle to the fluid flow. The presence of holes in the walls of the corrugations and the location of the side walls at an angle to the fluid flow creates the necessary flow turbulence. This allows you to increase the thermal power of the heat exchanger by 10-15%.

Protrusions are molded into the oblong plates. Protrusions formed in oblong plates, when the sections are combined, form stops that provide structural rigidity, prevent deformation of the gaps and failure of the heat exchanger, providing the necessary thermal power.

The inventive plate heat exchanger is illustrated by the following drawings.

In fig. 1 shows a plate heat exchanger;

in fig. Figure 2 shows a section A-A of a plate heat exchanger;

in fig. Figure 3 shows a section of a plate heat exchanger in isometry;

in fig. Figure 4 shows a sectional fragment of the liquid flow channel of a plate heat exchanger;

in fig. 5 shows a fragment of the core in isometry; Fig. Figure 6 shows a fragment of the core, top view.

Plate heat exchanger 1 contains at least one pair of elongated plates 2, fastened at the edges and spaced from each other to create a fluid flow channel 3, and forming a section 4. The plates 2 have inlet 5 and outlet 6 holes to set the direction of fluid flow. Protrusions 7 are molded into the elongated plates. A core 8 is installed between the plates 2. The core 8 consists of a corrugated metal sheet. The upper 9 and lower 10 walls of the corrugations 11 are in contact with the plates 2, forming a liquid flow channel 3 for transferring heat from the liquid to the plates. There are holes 13 in the side walls 12 of the corrugations 11 of the core 8. The side walls 12 of the corrugations 11 between the holes are made at an angle of 14 to the fluid flow. The location of the side walls at an angle to the fluid flow creates the necessary flow turbulence. This allows you to increase the thermal power of the heat exchanger by 10...15%.

The heat exchanger can be assembled from several sections 4, forming liquid flow channels. Sections 4 are combined with each other along the inlet 5 and outlet 6 holes and protrusions 7 in the oblong plates, while a gap 15 is formed between the sections. When the sections are combined along the inlet 5 holes and outlet 6 holes, an inlet channel 16 and an outlet channel 17 are formed, respectively. Gap 15 is provided by spacer washers 18 located around the inlet and outlet holes, as well as protrusions 7 formed in oblong plates, thereby forming channels for air flows and ensuring the direction of air flow.

Protrusions formed in oblong plates, when the sections are combined, form stops that provide structural rigidity, prevent deformation of the gaps and failure of the heat exchanger, providing the necessary thermal power.

The inventive plate heat exchanger operates as follows. The heat exchanger is connected to the oil circulation system using flanges 19. The oil enters the inlet channel 16 of the heat exchanger and flows through the heat exchanger flow channels 3 through the cores 8, which increase the turbulence of the oil flow, to the outlet channel 17 of the heat exchanger. Arrow 20 shows the direction of fluid movement. The heat exchanger is installed in a cavity connected to the engine cooling system. The coolant flow washes the heat exchanger sections along gaps 15 and cools the oil.

The inventive plate heat exchanger can be made using existing technical means on existing equipment.

The proposed plate heat exchanger design has high heat transfer efficiency. The heat exchanger is characterized by a simple design, small overall dimensions and low cost, combined with ease and manufacturability of installation and maintenance during operation.

Claims (2)

1. A plate heat exchanger containing at least one section consisting of a pair of elongated plates and a core, with the elongated plates fastened along the perimeter and spaced from each other to form a liquid flow channel, the plates have inlet and outlet holes to set the flow direction liquid, and the core is located between the plates in the path of liquid flow and is a corrugated metal sheet, while the corrugations of the core are in contact with the elongated plates, characterized in that there are holes in the walls of the corrugations, and the walls of the corrugations between the holes are made at an angle to the fluid flow . 2. Plate heat exchanger according to claim 1, characterized in that protrusions are formed in the elongated plates.