An annular cooler

Abstract

The present invention belongs to the technical field of compressor coolers, and particularly relates to an annular cooler. The annular cooler of the present invention includes an annular working fluid side end plate, a plurality of intermediate plates, and a cooling medium side end plate that are connected in sequence; the working fluid side end plate and the plurality of intermediate plates are provided with a plurality of cooling medium side flow channels, and both the plurality of intermediate plates and the cooling medium side end plate are provided with a cooling medium side inlet through groove and a cooling medium side outlet through groove, and the plurality of cooling medium side inlet through grooves, the plurality of cooling medium side flow channels, and the plurality of cooling medium side outlet through grooves are communicated; the cooling medium side end plate and the plurality of intermediate plates are provided with a plurality of working fluid side flow channels, and both the plurality of intermediate plates and the working fluid side end plate are provided with a working fluid side inlet through groove and a working fluid side outlet, and the plurality of working fluid side inlet through grooves, the plurality of working fluid side flow channels, and the plurality of middle holes are communicated. The purpose of the present invention is to provide an annular cooler that is arranged between stages of a multi-stage centrifugal compressor to cool the working fluid in flow.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor coolers, and particularly relates to an annular cooler. Background Art

[0002] Compressors are power-consuming devices. The inlet temperature of the impeller has a great influence on the power consumption of the unit. To improve the efficiency of the compressor, inter-stage cooling is often used to reduce the inlet temperature of the latter stages of the compressor, thereby reducing the compression power consumption of the latter stages and achieving the purpose of improving the compressor efficiency. To cool the working medium of the previous stages, at present, a volute is mainly arranged at the outlet of the previous stages to lead the working medium out of the unit, and is connected to a cooler through a pipeline outside, and then re-connected to the inlet of the latter stages of the unit through a pipeline after cooling. Since this form needs to lead the working medium out of the unit from the previous stages, an additional exhaust volute needs to be provided, or a split-shaft or segmented arrangement is adopted, thus increasing the volume of the unit. At the same time, due to the increase of external pipelines, the loss of the working medium increases.

[0003] For a cantilever unit with fewer stages, such as a two-stage cantilever, due to the compact structure of the unit, if the volute is used to lead out the exhaust at the first stage for cooling, the volume of the unit will inevitably increase. At the same time, if the volute is used to lead out the exhaust at the first stage, the cantilever amount will increase, resulting in safety problems of the unit. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide an annular cooler arranged between stages of a multi-stage centrifugal compressor to cool the flowing working medium.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An annular cooler includes a working medium side end plate, a plurality of intermediate plates, and a cooling medium side end plate connected in sequence. Middle holes are provided in the middle of the working medium side end plate, the plurality of intermediate plates, and the cooling medium side end plate; a plurality of cooling medium side flow channels are provided on the cooling medium side of the working medium side end plate and the plurality of intermediate plates, and a cooling medium side inlet through groove and a cooling medium side outlet through groove are provided on the plurality of intermediate plates and the cooling medium side end plate, and the plurality of cooling medium side inlet through grooves, the plurality of cooling medium side flow channels, and the plurality of cooling medium side outlet through grooves are communicated; a plurality of working medium side flow channels are provided on the working medium side of the cooling medium side end plate and the plurality of intermediate plates, and a working medium side inlet through groove and a working medium side outlet are provided on the plurality of intermediate plates and the working medium side end plate. The working medium side outlet is located at the middle hole, and the plurality of working medium side inlet through grooves, the plurality of working medium side flow channels, and the plurality of middle holes are communicated.

[0007] The working fluid is distributed to the corresponding working fluid side channels between the plates through the working fluid side inlet grooves. After the working fluid exchanges heat with the cooling medium through the working fluid side channels, the temperature of the working fluid decreases and the working fluid is discharged from the working fluid side outlet of the cooler. The cooling medium is distributed to the corresponding cooling medium side channels between the plates through the cooling medium side inlet grooves. After the cooling medium exchanges heat with the working fluid through the cooling medium side channels, the temperature of the cooling medium increases and the working fluid flows into the cooling medium side outlet grooves and is finally discharged from the cooler.

[0008] After the plates are connected, the working fluid side flow channel and the cooling medium side flow channel are separated and will not flow into each other. The working fluid and cooling medium flow on both sides of the plate respectively, thereby cooling the working fluid in the interstage flow. The cooler is directly arranged between the two stages, effectively utilizing the original returner space. Compared with the unit with an external intercooler, the unit body size does not change much, and avoids the large loss of working fluid caused by the increase of external pipelines.

[0009] As a preferred solution of the present invention, the working fluid side of the working fluid side end plate is also provided with a working fluid side flow channel, and the working fluid side flow channel on the working fluid side end plate is also connected to a number of working fluid side inlet grooves and a number of middle holes, and a working fluid side cover plate is connected to the side of the working fluid side end plate away from the middle plate body, and the working fluid side cover plate covers the area where the working fluid side flow channel is provided on the working fluid side end plate, and a working fluid side inlet is formed between the edge of the working fluid side cover plate and the working fluid side inlet groove area of ​​the working fluid side cover plate, and the working fluid side inlet is connected to the working fluid side inlet groove. When the working fluid side flow channel is provided on the working fluid side end plate, the working fluid side end plate needs to be blocked. The working fluid side flow channel on the working fluid side end plate is covered by the working fluid side cover plate to prevent leakage of the working fluid. The working fluid enters the cooler from the working fluid side inlet, and the working fluid is distributed to the corresponding working fluid side flow channels between each plate body through the working fluid side inlet groove. After the working fluid exchanges heat with the cooling water through the working fluid side flow channel, the temperature is reduced and the working fluid is discharged from the cooler from the working fluid side outlet.

[0010] As a preferred embodiment of the present invention, the cooling medium side of the cooling medium side end plate is also provided with a cooling medium side flow channel, and the cooling medium side flow channel on the cooling medium side end plate is also connected to a plurality of cooling medium side inlet through grooves and a plurality of cooling medium side outlet through grooves, and a cooling medium side cover plate is connected to the side of the cooling medium side end plate away from the middle plate body, and the working medium side cover plate covers the area where the cooling medium side flow channel is provided on the working medium side end plate. When the cooling medium side flow channel is provided on the cooling medium side of the cooling medium side end plate, the cooling medium side end plate needs to be blocked. The cooling medium side flow channel on the cooling medium side end plate is covered by the cooling medium side cover plate to prevent leakage of the cooling medium.

[0011] As a preferred embodiment of the present invention, a cooling medium side inlet, a cooling medium side annular cavity, a cooling medium side outlet through groove radial hole, and a cooling medium side outlet are provided on the cooling medium side cover plate. The cooling medium side inlet is communicated with the cooling medium side inlet through groove. The cooling medium side outlet through groove, the cooling medium side annular cavity, the cooling medium side outlet through groove radial hole, and the cooling medium side outlet are communicated in sequence. The cooling medium enters the cooler from the cooling medium side inlet, and the cooling medium is distributed to the corresponding cooling medium side flow channels between the plates through the cooling medium side inlet through groove. After the cooling medium exchanges heat with the working medium through the cooling medium side flow channel, the temperature rises and flows into the cooling medium side outlet through groove, and uniformly flows into the cooling medium side annular cavity along the axis. After being mixed in the cooling medium side annular cavity, it flows radially, passes through the cooling medium side outlet radial hole, and is discharged from the cooler at the cooling medium side outlet.

[0012] As a preferred embodiment of the present invention, the cooling medium side inlet and the cooling medium side outlet are located in the same orientation or opposite orientations on the cooling medium side cover plate. The cooling medium side inlet and the cooling medium side outlet are not limited to being arranged on the same side of the cooler, and can also be respectively arranged on both sides of the cooler.

[0013] As a preferred embodiment of the present invention, the working medium side flow channels and the cooling medium side flow channels on the same intermediate plate body, or the working medium side end plate, or the cooling medium side end plate are staggered to reduce the processing difficulty and avoid the communication between the working medium side flow channels and the cooling medium side flow channels.

[0014] As a preferred embodiment of the present invention, the working medium side inlet through groove is located on the side of the working medium side flow channel close to the outer extension; the cooling medium side inlet through groove is located on the side of the cooling medium side flow channel close to the outer extension, and the cooling medium side outlet through groove is located on the side of the cooling medium side flow channel close to the center.

[0015] As a preferred embodiment of the present invention, the shapes of the cooling medium side flow channel and the working medium side flow channel are spiral, or a spiral shape with bends, or a rectangular shape with bends.

[0016] As a preferred embodiment of the present invention, a plurality of working medium side flow channels or a plurality of cooling medium side flow channels on the same intermediate plate body, or the working medium side end plate, or the cooling medium side end plate are evenly distributed.

[0017] As a preferred embodiment of the present invention, a plurality of working medium side inlet through grooves, or a plurality of cooling medium side inlet through grooves, or a plurality of working medium side outlets, or a plurality of cooling medium side outlet through grooves on the intermediate plate body are evenly distributed; a plurality of working medium side inlet through grooves on the working medium side end plate are evenly distributed, and a plurality of cooling medium side inlet through grooves on the cooling medium side end plate are evenly distributed.

[0018] The beneficial effects of the present invention are as follows:

[0019] After the plate bodies of the present invention are connected, the working medium side flow channel and the cooling medium side flow channel are separated and will not flow into each other. The working medium and the cooling medium flow on both sides of the plate body respectively, so as to cool the working medium in the inter-stage flow. The cooler is directly arranged between two stages, effectively utilizing the original refluxer space. Compared with the unit adopting an external intercooler, the size of the unit body does not change much, and the large loss of the working medium caused by the increase of external pipelines is avoided. Brief Description of the Drawings

[0020] Figure 1 is a partial structural diagram of the present invention;

[0021] Figure 2 is an assembly drawing of the present invention;

[0022] Figure 3 is a front view of the present invention;

[0023] Figure 4 is a sectional view of the present invention;

[0024] Figure 5 is a schematic structural diagram of the working medium side of the intermediate plate body;

[0025] Figure 6 is a schematic structural diagram of the cooling medium side of the intermediate plate body;

[0026] Figure 7 is a schematic structural diagram of the working medium side of the end plate on the cooling medium side;

[0027] Figure 8 is a schematic structural diagram of the cooling medium side of the end plate on the working medium side;

[0028] Figure 9 is a schematic diagram of a bent spiral shape;

[0029] Figure 10 is a schematic diagram of a bent rectangle;

[0030] Figure 11 is a schematic diagram when the working medium side flow channel and the cooling medium side flow channel adopt a 90° spiral line.

[0031] In the figure: 1 - cover plate on the working medium side; 2 - end plate on the working medium side; 3 - intermediate plate body; 4 - end plate on the cooling medium side; 5 - cover plate on the cooling medium side; a - inlet on the working medium side; b - inlet through groove on the working medium side; c - outlet on the working medium side; d - inlet on the cooling medium side; e - inlet through groove on the cooling medium side; f - outlet through groove on the cooling medium side; g - radial hole at the outlet on the cooling medium side; h - outlet on the cooling medium side; i - working medium side flow channel; j - cooling medium side flow channel; k - annular cavity on the cooling medium side. Detailed Embodiment

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0034] As Figures 1 - 6 shown, the annular cooler of this embodiment includes a working fluid side end plate 2, several intermediate plate bodies 3, and a cooling medium side end plate 4 connected in sequence. Middle holes are provided in the middle of the working fluid side end plate 2, several intermediate plate bodies 3, and the cooling medium side end plate 4; several cooling medium side flow channels j are provided on the cooling medium side of the working fluid side end plate 2 and the cooling medium sides of several intermediate plate bodies 3. A cooling medium side inlet through groove e and a cooling medium side outlet through groove f are provided on several intermediate plate bodies 3 and the cooling medium side end plate 4. Several cooling medium side inlet through grooves e, several cooling medium side flow channels j, and several cooling medium side outlet through grooves f are connected; several working fluid side flow channels i are provided on the working fluid side of the cooling medium side end plate 4 and the working fluid sides of several intermediate plate bodies 3. A working fluid side inlet through groove b and a working fluid side outlet c are provided on several intermediate plate bodies 3 and the working fluid side end plate 2. The working fluid side outlet c is located at the middle hole. Several working fluid side inlet through grooves b, several working fluid side flow channels i, and several middle holes are connected. The working fluid side inlet through groove b, the cooling medium side inlet through groove e, and the cooling medium side outlet through groove f all penetrate the plate body.

[0035] The cooler of the present invention has an integral circular ring structure. After the plate bodies are connected, the working fluid side flow channels i and the cooling medium side flow channels j are separated and will not cross-flow. The working fluid and the cooling medium flow on both sides of the plate body respectively, thereby cooling the working fluid in the inter-stage flow. The cooler is directly arranged between two stages, effectively utilizing the original refluxer space. Compared with the unit using an external intercooler, the size of the unit body does not change much, and the problem of large working fluid loss caused by the increase of external pipelines is avoided.

[0036] To ensure the relative independence of the working fluid side and the cooling medium side, the working fluid side end plate 2 needs to block or not process the cooling medium side inlet through groove e and the cooling medium side outlet through groove f, and the cooling medium side end plate 4 needs to block or not process the working fluid side inlet through groove b. In this embodiment, the working fluid side end plate 2 does not process the cooling medium side inlet through groove e and the cooling medium side outlet through groove f, and the cooling medium side end plate 4 does not process the working fluid side inlet through groove b.

[0037] As Figure 7 and Figure 8 shown, the working fluid side of the working fluid side end plate 2 can also be provided with a working fluid side flow channel i and covered with a working fluid side cover plate 1; the cooling medium side of the cooling medium side end plate 4 can also be provided with a cooling medium flow channel and covered with a cooling medium side cover plate 5. The working fluid side cover plate 1, the working fluid side end plate 2, the intermediate plate body 3, the cooling medium side end plate 4, and the cooling medium side cover plate 5 are arranged axially, and each component is firmly connected by welding or bonding technology, and the flow channels are closed and do not cross-flow with each other.

[0038] The working fluid side flow channel i on the working fluid side end plate 2 is also connected to a number of working fluid side inlet through grooves b and a number of middle holes. On the side of the working fluid side end plate 2 facing away from the intermediate plate body 3, there is a working fluid side cover plate 1. The working fluid side cover plate 1 covers the area where the working fluid side flow channel i is provided on the working fluid side end plate 2. Between the edge of the working fluid side cover plate 1 and the area of the working fluid side inlet through groove b of the working fluid side cover plate 1, there is a working fluid side inlet a, and the working fluid side inlet a is connected to the working fluid side inlet through groove b. When the working fluid side of the working fluid side end plate 2 is provided with a working fluid side flow channel i, the working fluid side end plate 2 needs to be blocked. By covering the working fluid side flow channel i on the working fluid side end plate 2 with the working fluid side cover plate 1, the leakage of the working fluid is avoided. The working fluid enters the cooler from the working fluid side inlet a, and the working fluid is distributed to the corresponding working fluid side flow channels i between the plates through the working fluid side inlet through groove b. After the working fluid exchanges heat with the cooling water through the working fluid side flow channel i, the temperature decreases and is discharged from the working fluid side outlet c of the cooler.

[0039] The cooling medium side flow channel j on the cooling medium side end plate 4 is also connected to a number of cooling medium side inlet through grooves e and a number of cooling medium side outlet through grooves f. On the side of the cooling medium side end plate 4 facing away from the intermediate plate body 3, there is a cooling medium side cover plate 5. The cooling medium side cover plate 5 covers the area where the cooling medium side flow channel j is provided on the working fluid side end plate 2. When the cooling medium side of the cooling medium side end plate 4 is provided with a cooling medium side flow channel j, the cooling medium side end plate 4 needs to be blocked. By covering the cooling medium side flow channel j on the cooling medium side end plate 4 with the cooling medium side cover plate 5, the leakage of the cooling medium is avoided.

[0040] Furthermore, a cooling medium side inlet d, a cooling medium side annular cavity k, a cooling medium side outlet through groove f radial hole, and a cooling medium side outlet h are provided on the cooling medium side cover plate 5. The cooling medium side inlet d is communicated with the cooling medium side inlet through groove e, and the cooling medium side outlet through groove f, the cooling medium side annular cavity k, the cooling medium side outlet through groove f radial hole, and the cooling medium side outlet h are communicated in sequence. The cooling medium enters the cooler from the cooling medium side inlet d, and the cooling medium is distributed to the corresponding cooling medium side flow channels j between the plates through the cooling medium side inlet through groove e. After the cooling medium exchanges heat with the working medium through the cooling medium side flow channel j, the temperature rises and flows into the cooling medium side outlet through groove f, and uniformly flows into the cooling medium side annular cavity k along the axis. After mixing in the cooling medium side annular cavity k, it flows radially through the cooling medium side outlet h radial hole g and is discharged from the cooling medium side outlet h of the cooler.

[0041] Among them, the cooling medium side inlet d and the cooling medium side outlet h are located in the same orientation or opposite orientations on the cooling medium side cover plate 5. The cooling medium side inlet d and the cooling medium side outlet h are not limited to being arranged on the same side of the cooler, and can also be respectively arranged on both sides of the cooler.

[0042] The cooling medium side outlet h radial hole g is not limited to being radially opened, and can also be a groove or other shapes, as long as the two sides are connected. The working medium side inlet through groove b, the cooling medium side inlet through groove e, and the cooling medium side outlet through groove f all penetrate the intermediate plate 3 and their respective side end plates at the corresponding spiral positions, forming a flow channel with one end blocked. So that the working medium can enter the corresponding flow channels of each plate after flowing along the through groove.

[0043] When the working medium side flow channel i and the cooling medium side flow channel j are processed, they can be staggered by a certain angle, thereby increasing the number of flow channels and the heat exchange area; or the working medium side flow channel i and the cooling medium side flow channel j are mirror images. The same or different types of flow channels can be used on both sides. In this embodiment, the working medium side flow channel i and the cooling medium side flow channel j on the same intermediate plate 3 or the working medium side end plate 2 or the cooling medium side end plate 4 are staggered, reducing the processing difficulty and avoiding the connection between the working medium side flow channel i and the cooling medium side flow channel j.

[0044] The shapes of the cooling medium side flow channel j and the working medium side flow channel i are spiral or spiral shapes with bends or rectangular shapes with bends. Figure 9 It is a schematic diagram of a spiral shape with bends. Figure 10 It is a schematic diagram of a rectangular shape with bends. When the shapes of the cooling medium side flow channel j and the working medium side flow channel i are spiral, the spiral lines of the working medium side flow channel i and the cooling medium side flow channel j are not limited to rotating 360°, and according to the structural arrangement, can be set to any angle, such as 90°, 45°, etc. and smaller angles, or 540°, 720°, etc. and larger angles. Figure 11Schematic diagram when the working fluid side flow channel i and the cooling medium side flow channel j adopt a 90° spiral line.

[0045] The working fluid side flow channel i and the cooling medium side flow channel j are not limited to adopting a semi-circular cross-section, and can also adopt a rectangular, hexagonal, or triangular cross-section.

[0046] The number of the intermediate plate bodies 3 is not limited to 10, and can be increased or decreased according to the structural requirements.

[0047] The cooling medium on the cooling medium side is not limited to water, and can also adopt Freon, organic cooling gas, air, or other liquid or gaseous cooling media.

[0048] In this embodiment, the working fluid side inlet through groove b is located on the side of the working fluid side flow channel i close to the outer extension; the cooling medium side inlet through groove e is located on the side of the cooling medium side flow channel j close to the outer extension, and the cooling medium side outlet through groove f is located on the side of the cooling medium side flow channel j close to the center. In some embodiments, the working fluid can also enter from the cooling medium side outlet h and flow out from the cooling medium side medium inlet, so as to form a countercurrent arrangement of the coolant and the working fluid.

[0049] A plurality of working fluid side flow channels i or a plurality of cooling medium side flow channels j on the same intermediate plate body 3, working fluid side end plate 2, or cooling medium side end plate 4 are evenly distributed. A plurality of working fluid side inlet through grooves b, a plurality of cooling medium side inlet through grooves e, a plurality of working fluid side outlets c, or a plurality of cooling medium side outlet through grooves f on the intermediate plate body 3 are evenly distributed; a plurality of working fluid side inlet through grooves b on the working fluid side end plate 2 are evenly distributed, and a plurality of cooling medium side inlet through grooves e on the cooling medium side end plate 4 are evenly distributed.

[0050] The cooler is not limited to inter-stage cooling, and can also be used for inlet cooling of the unit, exhaust heat regeneration, etc.

[0051] Working principle:

[0052] The working fluid enters the cooler from the working fluid side inlet a, and the working fluid is distributed to the corresponding working fluid side flow channels i between the plates through the working fluid side inlet through groove b. After the working fluid exchanges heat with the cooling water through the working fluid side flow channel i, the temperature decreases and is discharged from the working fluid side outlet c of the cooler.

[0053] The cooling medium enters the cooler from the cooling medium side inlet d, and the cooling medium is distributed to the corresponding cooling medium side flow channels j between the plates through the cooling medium side inlet through groove e. After the cooling medium exchanges heat with the working fluid through the cooling medium side flow channel j, the temperature increases, flows into the cooling medium side outlet through groove f, and uniformly flows axially into the cooling medium side annular cavity k. After being mixed in the cooling medium side annular cavity k, it flows radially, passes through the radial hole g of the cooling medium side outlet h, and is discharged from the cooling medium side outlet h of the cooler.

[0054] The annular cooler of the present invention can cool the working medium after pre-stage compression, thereby reducing the inlet temperature of the post-stage, decreasing the power consumption of the post-stage compressor, and improving the efficiency of the unit. The present invention adopts multiple spiral grooves processed on both sides, which can effectively increase the heat exchange area of the cooler and reduce the volume of the cooler. The annular cooler adopts a circular ring structure, and the outlet of the diffuser of the unit is directly connected to the inlet of the intercooler, reducing the flow loss of the volute and the external pipeline. The cooler is directly arranged between the two stages, effectively utilizing the space of the original return device. Compared with the unit adopting an external intercooler, the size of the unit body does not change much. The annular cooler of the present invention is an integral annular structure, which is convenient for axial installation and positioning. Under a fixed volume, the heat exchange area of the annular cooler of the present invention is larger than that of a conventional plate-type or tube-type cooler, and the volume of the cooler can be effectively reduced.

[0055] The present invention is not limited to the above optional embodiments. Any person can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present invention, they all fall within the protection scope of the present invention.

Claims

1. A ring cooler, Features: The invention comprises a working medium side end plate (2), a plurality of intermediate plates (3), and a cooling medium side end plate (4) which are connected in sequence, wherein the working medium side end plate (2), the plurality of intermediate plates (3), and the cooling medium side end plate (4) are all provided with a central hole in the middle; the cooling medium side of the working medium side end plate (2) and the cooling medium side of the plurality of intermediate plates (3) are both provided with a plurality of cooling medium side flow channels (j); the plurality of intermediate plates (3) and the cooling medium side end plate (4) are both provided with a cooling medium side inlet through groove (e) and a cooling medium side outlet through groove (f); if A dry cooling medium side inlet groove (e), a plurality of cooling medium side flow channels (j), and a plurality of cooling medium side outlet grooves (f) are connected; a plurality of working medium side flow channels (i) are provided on the working medium side of the cooling medium side end plate (4) and the working medium side of the plurality of intermediate plates (3); a working medium side inlet groove (b) and a working medium side outlet (c) are provided on the plurality of intermediate plates (3) and the working medium side end plate (2); the working medium side outlet (c) is located at the middle hole; and a plurality of working medium side inlet grooves (b), a plurality of working medium side flow channels (i), and a plurality of middle holes are connected; The working fluid side of the working fluid side end plate (2) is also provided with a working fluid side flow channel (i), and the working fluid side flow channel (i) on the working fluid side end plate (2) is also connected to a plurality of working fluid side inlet through grooves (b) and a plurality of middle holes. A working fluid side cover plate (1) is connected to a side of the working fluid side end plate (2) away from the middle plate body (3), and the working fluid side cover plate (1) covers a region of the working fluid side end plate (2) where the working fluid side flow channel (i) is provided. A working fluid side inlet (a) is formed between an edge of the working fluid side cover plate (1) and a region of the working fluid side inlet through groove (b) of the working fluid side cover plate (1), and the working fluid side inlet (a) is connected to the working fluid side inlet through groove (b); The cooling medium side of the cooling medium side end plate (4) is also provided with a cooling medium side flow channel (j), and the cooling medium side flow channel (j) on the cooling medium side end plate (4) is also connected to a plurality of cooling medium side inlet through grooves (e) and a plurality of cooling medium side outlet through grooves (f). A cooling medium side cover plate (5) is connected to the side of the cooling medium side end plate (4) facing away from the intermediate plate body (3), and the cooling medium side cover plate (5) covers the area of ​​the working medium side end plate (2) where the cooling medium side flow channel (j) is provided.

2. A ring cooler according to claim 1, Features: The cooling medium side cover plate (5) is provided with a cooling medium side inlet (d), a cooling medium side annular cavity (k), a cooling medium side outlet slot radial hole (g) and a cooling medium side outlet (h); the cooling medium side inlet (d) is connected to the cooling medium side inlet slot (e), and the cooling medium side outlet slot (f), the cooling medium side annular cavity (k), the cooling medium side outlet slot radial hole (g) and the cooling medium side outlet (h) are connected in sequence.

3. A ring cooler according to claim 2, Features: The cooling medium side inlet (d) and the cooling medium side outlet (h) are located at the same position or opposite positions of the cooling medium side cover plate (5).

4. The annular cooler according to claim 1, It is characterized in that: The working fluid side flow channels (i) and the cooling medium side flow channels (j) on the same intermediate plate body (3), or the working fluid side end plate (2), or the cooling medium side end plate (4) are staggered.

5. An annular cooler according to claim 1, It is characterized in that: The working fluid side inlet through groove (b) is located on the side of the working fluid side flow channel (i) close to the outer extension; the cooling medium side inlet through groove (e) is located on the side of the cooling medium side flow channel (j) close to the outer extension, and the cooling medium side outlet through groove (f) is located on the side of the cooling medium side flow channel (j) close to the center.

6. An annular cooler according to claim 1, It is characterized in that: The shapes of the cooling medium side flow channels (j) and the working fluid side flow channels (i) are spiral, or spiral shapes with bends, or rectangular shapes with bends.

7. An annular cooler according to claim 1, It is characterized in that: A plurality of working fluid side flow channels (i) or a plurality of cooling medium side flow channels (j) on the same intermediate plate body (3), or the working fluid side end plate (2), or the cooling medium side end plate (4) are evenly distributed.

8. An annular cooler according to claim 1, It is characterized in that: A plurality of working fluid side inlet through grooves (b), or a plurality of cooling medium side inlet through grooves (e), or a plurality of working fluid side outlets (c), or a plurality of cooling medium side outlet through grooves (f) on the intermediate plate body (3) are evenly distributed; a plurality of working fluid side inlet through grooves (b) on the working fluid side end plate (2) are evenly distributed, and a plurality of cooling medium side inlet through grooves (e) on the cooling medium side end plate (4) are evenly distributed.

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