The invention relates to heat-exchange equipment and can be used for heating or cooling of liquids and gaseous media.

Already known heat exchanger, the design of which involves planning at least one unit of a node of a spiral heat transfer tube, which consists of a folded heat transfer tube having a complex lengthwise cut of the pipe wall, wound in the form of a spiral, the plate is located between the links of the spiral heat transfer tube, which are separated by one from one, or a plate with a wound flat lid, is usually used for each node of a spiral heat transfer tube and is concentrically inserted between adjacent folded heat exchange tubes by the multi-stage spiral heat transfer, and this multi-stage body of the spiral heat transfer tube is located in the container and at the ends of the central side of the tube, and the ends of the outer tube each of the spiral tubes of the heat exchangers are arranged successively in the container, and the inner part of the container is used as one flow system and the inner part each of the spiral heat exchange tube blocks is used as another flow system accordingly, so it is possible to carry out the heat exchange on the counter-flow in the case of a crossover flow or an inexpensive flow between two fluid media. (Patent JPS5188865 (U), publ.1976-07-16).

The closest to the proposed is a spiral heat exchanger, in the design of which the spiral path (7) is made between the spiral partitions (3), equipped with a vessel; a plurality of spiral tubes (4) which are in contact with the spiral path (7), are arranged vertically; and heat exchanges between the second fluid medium flowing through the spiral tubes (4) and the first fluid medium flowing through the spiral path (7) outside the spiral tubes (4).The width of the flow path (FP) of the spiral road (7), through which the first fluid medium flows outside of the spiral tubes (4) in the direction parallel to the central direction of the spiral tubes spiral(4), is equivalent to the width of the passage path (PP) of the spiral path (7) , through which the first fluid flows from the outside of the spiral tubes (4) in a direction perpendicular to the central direction of the spiral tubes (4). (Patent WO2015020047 (A1), publ. 2015-02-12).

The technical aim of the invention is the creation of three-contour spiral heat exchanger with the possibility of heating or cooling of heat exchange media in independent temperature modes.

This task is achieved due to a new construction of the three-contour spiral heat exchanger, which includes a housing with input and output pipe for passage of the first heat exchange medium and a guide of its flow, made in the form of a spiral separating wall twisted in the direction from the side walls of the housing to the center, while the channel for passing the second heat exchange medium serves a bundle of spiral tubes, located in the space between the turns of the spiral separating wall, and the ends of each of the spiral tubes of the channel of the second heat exchange medium are connected to the inlet and outlet collectors, is characterized by the free space formed between the spiral separating walls and the bundle of the spiral tubes of the channel of the second heat exchange medium is divided by a length by a shutter node into two parts, where the first part serves as a channel for passage of the first heat exchange medium with the inlet pipe and the outlet pipe, and the second part performs the function of the channel for passage of the third heat exchange medium with the inlet pipe and outlet pipe.

In accordance with claim item 1 the three-contour spiral heat exchanger comprises an additional outlet pipe for the first heat exchange medium, while the shutter node comprising a shutter valve.

Description of figures: Fig. 1 - shows three-contour spiral heat exchanger in a cutaway A - A.

Fig. 2 - shows three-contour spiral heat exchanger in a cutaway B - B. where: 1 - heat exchanger housing; 2 - spiral separation wall; 3 - channel for the passage of the first heat exchange medium; 4 - channel for the passage of the second heat exchange medium; 5 - pipe for the inlet of the first heat exchange medium; 6 - pipe for the outlet of the first heat exchange medium; 7 -collector inlet of the second heat exchange medium; 8 -collectors for the outlet of the second heat exchange medium; 9 - pipe for the inlet of the third heat exchange medium; 10 - pipe for the outlet of the third heat exchange medium; 11 - shutter node; 12 - shutter valve; 13 - channel for the passage of the third heat exchange medium; 14 - additional outlet pipe for the first heat exchange medium.

The technical aim of the invention is creating a three-contour spiral heat exchanger with the possibility of heating or cooling of heat exchange media in independent from one another temperature regimes.

This set goal is achieved due to a new construction of the three-contour spiral heat exchanger comprising a housing 1 with an inlet and outlet pipes for passage of the first heat exchange medium and with a guide of its flow, made in the form of a spiral separation wall 2 twisted from the side walls of the housing 1 towards the center, while a channel 4 for the passage of the second heat exchange medium serves a bundle of spiral tubes located in the gap between the turns of the spiral separation wall 2, and the ends of each of the spiral tubes of the channel 4 of the second heat exchange medium are connected to the input 7 and the output 8 collectors, characterized by the free space formed by a free space between the spiral separating walls 2 and a bundle of spiral tubes of the channel 4 of the second heat exchange medium, separated by the length by a shutter node 11 in two parts, where the first part performs the function of the channel 3 for passage of the first heat exchange medium with the inlet pipe 5 and the outlet pipe 6, and the second part serves as a channel 13 for passage the third heat exchange medium with the inlet pipe 9 and outlet pipe 10.

In accordance with claim item 1 the three-contour spiral heat exchanger comprises an additional outlet pipe 14 for the first heat exchange medium, while the shutter node 11 comprising a shutter valve 12. Three-contour spiral heat exchanger works like this:

Along the pipe 5 into the three-contour spiral heat exchanger comes the first heat exchange medium, which passes through the channel 3 and goes out of three-contour spiral heat exchanger via the pipe 6, with the additional outlet pipe for the first heat exchange medium 14 is blocked. The third heat exchange medium enters into a third heat exchange medium by the pipe 9, which passes through the channel 13 and flows from the three-contour spiral heat exchanger through the pipe 10.The second heat exchange medium enters the three- contour spiral heat exchanger through the collector 7, which passes through the channel 4 located inside the channels 3 and 13, and comes from a three- contour spiral heat exchanger through collector 8. During the passage of heat exchange media along the three-contour spiral heat exchanger, through the wall of spiral pipe of 4 channel between the first and the second also between the second and the third heat exchange medium, the heat exchange process occurs. During the same time, the shutter node 11 separates channels 3 and 13 among themselves.

In accordance with claim item 2, three-contour spiral heat exchanger can operate in two modes. The first mode of operation is according to the first part of the formula. When working in the second mode - the shutter valve 12 is opened, the pipes 6, 9 and 10 are closed, an additional outlet pipe

14 is opened, while the heat transfer happens only between the first and the second heat exchange media along the entire length of the channel 4 of the three-contour spiral heat exchanger.