Heat exchanger

Abstract

The invention refers to a heat exchanger that can be used to heat liquids as well as in other areas of thermoenergetics, using electric heat sources. The heat exchanger, according to the invention, consists of: metal body, equipped with channels A, B, C, D, E, F. The liquid supply takes place through the supply connection mounted in channel A. In channel B and C, thermal jackets are mounted, and in technological holes - are mounted plugs. The electric heaters, which are supplied with electricity through contacts, are mounted in a hole and in the thermal jackets. The evacuation of the heated liquid takes place through channel F, in which the exhaust connection is mounted. Channel D ensures the movement of liquid from channel A to channel B, and channel E ensures the movement of liquid from channel B to channel C. The plug, closes from the outside the technological holes, as they were formed due to the technological process of execution of channel D and E.

Description

[0001] The invention refers to a heat exchanger that can be used to heat liquids as well as in other areas of thermoenergetics, using electric heat sources.

[0002] The convective heat exchanger, used to cool the Roentgen emitter, which consists of two main parts - the anode and the cathode, which are under different voltages, is known. The most thermally stressed part, which requires cooling, is the anode. Autonomously, without the application of potentials to the anode and cathode, such a heat exchanger cannot operate. Both the heat exchanger and the synchronously linked Roentgen emitter require an external high voltage source [1].

[0003] The disadvantages of this heat exchanger consist in the use of only one pair of electrodes, which allows obtaining a very weak convection, and the use in it of electrodes with sharp protrusions, which leads to a rapid degradation of the dielectric liquid.

[0004] The convective heat exchanger is known, which contains a body with heat inlet and outlet areas, wire-shaped electrodes placed in pairs, covered with dielectric material and connected to the negative poles of the voltage source, and uncovered electrodes, connected to the positive poles of the source [2].

[0005] The presented technical solution has the disadvantage consisting in the location of the heat inlet and outlet areas. The heat inlet area is at the top and the exhaust area is at the bottom. Such location of the heat inlet and outlet areas completely excludes natural convection.

[0006] The closest solution is the convective electrohydrodynamic exchanger, which contains downward channels with a heat inlet area and upward with a heat outlet area, a voltage source and emitting electrodes, connected to the external high voltage source [3].

[0007] The disadvantages of this heat exchanger are the need for an external high voltage source, the need for connection conductors and low and high voltage converters. As a result, such heat exchangers are not cost-effective in terms of their energy consumption and working efficiency.

[0008] The purpose of the invention is to increase the efficiency of heat transfer from the electrical resistance to the product, by using a low overall construction and low energy consumption. At the same time, the reduced thickness of the liquid layer that comprises the thermal jacket during its movement through the body of the heat exchanger, allows to increase the working efficiency for a relatively wide range of liquid flow inside it. Also, the outer surface of the thermal jackets allows to increase the distance traveled by the liquid inside the heat exchanger, as it is rifled in the form of a spiral. This leads to rapid heating of the liquid and reduced energy consumption.

[0009] The problem formulated is solved by the fact that the heat exchanger consists of a metal body, equipped with channels A, B, C, D, E, F. The liquid supply takes place through a supply connection, which is mounted in channel A. In channel B and C, some thermal jackets are mounted, and in the technological holes - some plugs. The electric heaters, which are supplied with electricity through the contacts, are mounted in the hole and in the thermal jackets. The evacuation of the heated liquid takes place through channel F, in which an exhaust connection is fitted. Channel D ensures the movement of liquid from channel A to channel B, and channel E ensures the movement of liquid from channel B to channel C. With the help of the plug, the technological holes are closed from the outside, as they were formed due to the technological process of execution of channel D and E.

[0010] The essence of the invention consists of the following: The heat exchanger ensures the increase of the efficiency of heat transfer from the electrical resistance to the liquid, by using a low overall construction and low energy consumption. At the same time, the reduced thickness of the liquid layer comprising the thermal jacket during movement through the body of the heat exchanger allows to increase the working efficiency for a wider range of liquid flow inside it. Also, the outer surface of the thermal jackets allows to increase the distance traveled by the liquid inside the heat exchanger, as it is rifled in the form of a spiral. This leads to rapid heating of the liquid and reduced energy consumption. At the same time, in order to increase the working efficiency of the heat exchanger, a preventive heating of the liquid is carried out by the first electric heater, after which the final heating is provided by the other electric heaters.

[0011] The following is an embodiment of the invention with reference to Figures: fig. 1, 3D overview; fig. 2, 3D overall view with transparent section body; fig. 3, overall 3D view; fig. 4, 3D sectional body view; fig. 5, 3D section overview;

[0012] The heat exchanger, according to the invention, consists of: metal body 1, equipped with channels A, B, C, D, E, F. The liquid supply takes place through the supply connection 2 mounted in channel A. In channel B and C, thermal jackets 3 are mounted, and in technological holes 4 - plugs 5. The electric heaters 6, which are supplied with electricity through the contacts 7, are mounted in the hole 8 and in the thermal jacket 3. The evacuation of the heated liquid takes place through channel F, in which the exhaust connection 9 is mounted. Channel D ensures the movement of liquid from channel A to channel B, and channel E ensures the movement of liquid from channel B to channel C. The plug 5, closes from the outside the technological holes 4, as they were formed due to the technological process of execution of channel D and E.

[0013] The heat exchanger, works as follows: Initially, the liquid supply takes place through the supply connection 2 mounted in channel A, where through the body 1, its preheating takes place with the help of the electric heater 6 mounted in hole 8. Subsequently, it hits through channel D into channel B, where the thermal jacket 3 in which the electric heater 6 is mounted, connected to the network through the contacts 7. Due to the spiral outer surface of the thermal jacket 3 and the small gap between it and channel B, the liquid is heated very quickly.

[0014] Then the liquid through channel E passes into channel C, where identical as in channel B is the thermal jacket 3 in which the electric heater 6 is mounted, after which it is discharged through the outlet connection 9, which is mounted in channel F.

[0015] For a reduced liquid flow, its preheating takes place using the electric heater 6 through the body 1, then the final heating with the electric heater 6 mounted in the thermal jacket 3 in channel B.

[0016] For increased liquid flow, the electric heater 6 mounted in the thermal jacket 3 in channel C is connected.Bibliographical references:

[0017] 1. 2, 1985, p. 48-50. 2. 47, 3, 2011, p. 55-59. 3. Short-term patent. Convective heat exchanger. MD 577 Z 2012.12.31.

Claims

1. The heat exchanger consists of a metal body 1 equipped with channels A, B, C, D, E, F. The liquid supply takes place through the supply connection 2 mounted in channel A. In channel B and C, thermal liners 3 are mounted, and in technological holes 4 - plugs 5. The electric heaters 6, which are supplied with electricity through the contacts 7, are mounted in the hole 8 and in the thermal jacket 3. The evacuation of the heated liquid takes place through channel F, in which the exhaust connection 9 is mounted. Channel D ensures the movement of liquid from channel A to channel B, and channel E ensures the movement of liquid from channel B to channel C. The plug 5, closes from the outside the technological holes 4, as they were formed due to the technological process of execution of channel D and E.

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