A three-pass microchannel compact heat exchanger and methods of use and design thereof

Abstract

The present application relates to heat exchange technical field, specifically to a kind of three-way flow microchannel compact heat exchanger and its use method and design method, comprising: heat exchange component and import and export component, the X-axis flow channel, Y-axis flow channel and Z-axis flow channel are arranged in the heat exchange component, the import and export of the X-axis flow channel and the import and export of the Y-axis flow channel are communicated with the import and export component;Multi-functional three-way flow microchannel compact heat exchanger provided by the present application realizes the efficient flow heat exchange of multiple working medium in three directions by the stacking welding of upper and lower cover plate and intermediate several layers X-axis flow channel plate and Y-axis flow channel plate, and adopts two-way communicating vessel and three-way communicating vessel to flexibly adjust working medium flow and direction, compact structure and strong adaptability, can simultaneously satisfy the heat exchange demand of multiple working medium, effectively improve heat exchange efficiency, reduce equipment volume and operating cost, widely applicable in nuclear power station, thermal power station and aeroengine etc.

Description

Technical Field

[0001] The present invention relates to the field of heat exchange technology, and in particular to a three-way flow microchannel compact heat exchanger and a use method and a design method thereof. Background Art

[0002] Heat exchangers are general process equipment used to allocate energy between different logistics and complete heat transfer. They are widely used in a large number of industries such as power generation, chemical industry, power, metallurgy, etc., especially in power circulation systems using supercritical carbon dioxide as the working fluid. Heat exchangers play an important role in transferring and allocating energy between working fluids.

[0003] With the continuous improvement of science and technology, people are paying more and more attention to the special application scenarios of power systems involved in nuclear power plants, thermal power plants, and aircraft engines. Reducing the size of equipment, improving efficiency, and reducing equipment manufacturing and operating costs and natural resource consumption are one of the future development directions of heat exchangers.

[0004] The heat exchangers currently used in conventional industrial fields mainly include shell and tube heat exchangers, double-tube heat exchangers, plate heat exchangers, and plate-fin heat exchangers. These cannot simultaneously meet the requirements of large heat transfer surface area, high welding strength, and small size. In recent years, with the improvement of industrial manufacturing levels, compact heat exchangers, mainly printed circuit board heat exchangers, have gradually entered the application stage. Their small microchannel size, high compactness, and welded joint strength close to the strength of the parent material have obvious advantages.

[0005] However, existing printed circuit board heat exchangers can only exchange heat between two working fluids. In actual applications, in order to meet the heat exchange requirements between multiple logistics, the number of heat exchangers must be increased. Increasing the number of heat exchangers will lead to problems such as increased costs and increased failure rates. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the heat exchanger can only perform heat exchange between two working fluids. The purpose is to provide a three-way flow microchannel compact heat exchanger and its use method and design method, which solves the problem of single function and few heat exchange directions of the heat exchanger.

[0007] The present invention is achieved through the following technical solutions:

[0008] A three-way flow microchannel compact heat exchanger, comprising: a heat exchange component and an inlet and outlet component, wherein the heat exchange component is provided with an X-axis flow channel, a Y-axis flow channel, and a Z-axis flow channel, and the inlet and outlet component is connected to the inlet and outlet of the X-axis flow channel and the inlet and outlet of the Y-axis flow channel;

[0009] The inlet and outlet components include:

[0010] An annular tube, wherein the inlet and outlet of the X-axis flow channel and the inlet and outlet of the Y-axis flow channel are both connected to the interior of the annular tube;

[0011] Inlet and outlet pipes, the four inlet and outlet pipes are all connected to the interior of the annular pipe and are distributed corresponding to the inlet and outlet of the X-axis flow channel and the inlet and outlet of the Y-axis flow channel;

[0012] The switch assembly is arranged in the annular tube and is located at the connection between the inlet and outlet connecting pipes and the inlet and outlet of the X-axis flow channel or the inlet and outlet of the Y-axis flow channel.

[0013] Specifically, the heat exchange component includes:

[0014] A heat exchange core having a first side surface, a second side surface, a third side surface, a fourth side surface, a fifth side surface, and a sixth side surface, wherein the first side surface is opposite to the second side surface, the third side surface is opposite to the fourth side surface, and the fifth side surface is opposite to the sixth side surface;

[0015] an interface assembly, the interface assembly being fixedly connected to the first side surface, the second side surface, the third side surface, the fourth side surface, the fifth side surface, and the sixth side surface, and being sealed with the side surface of the heat exchange core;

[0016] In which, the X-axis flow channel, the Y-axis flow channel and the Z-axis flow channel are provided inside the heat exchange core, the X-axis flow channel penetrates and connects the first side surface and the second side surface, the Y-axis flow channel penetrates and connects the third side surface and the fourth side surface, the Z-axis flow channel penetrates and connects the fifth side surface and the sixth side surface, and the X-axis flow channel, the Y-axis flow channel and the Z-axis flow channel are not connected.

[0017] Optionally, setting the interface component includes: a first interface connected to the first side surface, a second interface connected to the second side surface, a third interface connected to the third side surface, a fourth interface connected to the fourth side surface, a fifth interface connected to the fifth side surface, and a sixth interface connected to the sixth side surface;

[0018] The first interface, the second interface, the third interface, the fourth interface, the fifth interface, and the sixth interface all include: a head and a pipe;

[0019] The head is a shell covering the X-axis flow channel, the Y-axis flow channel, and the Z-axis flow channel, and the head is sealed and connected to the side of the heat exchange core. One end of the connecting pipe is sealed and connected to the head, and the connecting pipe is connected to the interior of the head.

[0020] Optionally, the heat exchange core comprises: a cover plate, an X-axis flow channel plate and a Y-axis flow channel plate;

[0021] A plurality of X-axis flow channel plates and a plurality of Y-axis flow channel plates are stacked between the two cover plates, a plurality of X-axis flow channels are arranged on the upper side of the X-axis flow channel plates, and a plurality of Y-axis flow channels are arranged on the upper side of the Y-axis flow channel plates;

[0022] The Z-axis flow channel is a plurality of through holes coaxially arranged and passing through the cover plate, the X-axis flow channel plate and the Y-axis flow channel plate.

[0023] Specifically, the X-axis flow channel is a flow channel groove provided on the upper side of the X-axis flow channel plate, and the Y-axis flow channel is a flow channel groove provided on the upper side of the Y-axis flow channel plate;

[0024] The flow channel groove is an arc groove, a rectangular groove or a special-shaped groove. In the length direction of the flow channel, the flow channel groove is a straight line, an S shape or a sine curve shape; the through hole is a circular hole, a rectangular hole, a semicircular hole or a special-shaped hole;

[0025] The X-axis flow channel plate and the Y-axis flow channel plate are periodically arranged in sequence;

[0026] The upper side of the X-axis flow channel plate is sealed and connected to the lower side of the previous flow channel plate to form the X-axis flow channel, and the Y-direction offset between two adjacent X-axis flow channels is 0.5-10 mm;

[0027] The upper side of the Y-axis flow channel plate is sealed and connected to the lower side of the previous flow channel plate to form the Y-axis flow channel. The X-direction offset between two adjacent Y-axis flow channels is 0.5-10 mm.

[0028] Optionally, the pipe of the first interface, the pipe of the second interface, the pipe of the third interface, and the pipe of the fourth interface are all connected to and communicated with the annular pipe, and the pipes are coaxially arranged with the corresponding inlet and outlet pipes;

[0029] The switch assembly includes: two two-way communicating vessels and two three-way communicating vessels, the two-way communicating vessels and the three-way communicating vessels include: a ball head disposed inside the annular tube and an adjustment handwheel disposed outside the annular tube and connected to the ball head, the ball head being located at the intersection of the connecting pipe, the inlet and outlet connecting pipes, and the annular tube;

[0030] One of the two-way communicating devices is provided at the fourth interface, and the other one of the two-way communicating devices is provided at the second interface;

[0031] One of the three-way communicating devices is provided at the first interface, and the other of the two-way communicating devices is provided at the third interface;

[0032] A "I"-shaped through hole is provided in the ball head of the two-way communicating vessel, and a "T"-shaped through hole is provided in the ball head of the three-way connector; the plane where the "I"-shaped through hole and the "T"-shaped through hole are located coincides with the plane where the annular tube is located.

[0033] Optionally, the two-way communicating vessel has a first state and a second state; the three-way communicating vessel has a first state, a second state and a third state;

[0034] When the bidirectional communicating device is in the first state, the "I"-shaped through hole communicates with the connecting pipe and the inlet and outlet connecting pipes;

[0035] When the bidirectional communicating vessel is in the second state, the "I"-shaped through hole is connected to the annular tube;

[0036] When the three-way connecting pipe is in the first state, the "T"-shaped through hole is connected to the connecting pipe, the inlet and outlet connecting pipes and the annular pipe;

[0037] When the three-way communicating vessel is in the second state, the "T"-shaped through hole communicates with the inlet and outlet connecting pipes and the annular pipe;

[0038] When the three-way communicating vessel is in the third state, the "T"-shaped through hole communicates with the connecting pipe and the annular pipe.

[0039] Optionally, the ball head is dynamically sealed at the connection between the annular tube, the connecting pipe and the inlet and outlet connecting pipes, the adjusting hand wheel is fixedly connected to the ball head through a rotating shaft, the rotating shaft passes through the annular tube and is sealed to the annular tube, the outer side surface of the ball head is provided with a ball head sealing layer, and the outer side surface of the rotating shaft is provided with a shaft sealing layer.

[0040] A method for using a three-way flow microchannel compact heat exchanger, based on the three-way flow microchannel compact heat exchanger described above, the method comprising:

[0041] Determine the heat dissipation method, "1-1-1" or "2-1"; the method of determining the heat dissipation method includes: judging and If yes, then use the "1-1-1" formula; if no, use the "2-1" formula; where, is the heat of the working fluid on the tertiary side, is the specific heat capacity of the tertiary side working fluid, is the specific heat capacity of the primary side working medium, the tertiary side working medium is the working medium flowing through the Z-axis flow channel, the primary side working medium is the working medium flowing through the X-axis flow channel, and the secondary side working medium is the working medium flowing through the Y-axis flow channel;

[0042] If it is "1-1-1", the two-way communicating device is controlled to be in the first state and the three-way communicating device is controlled to be in the first state;

[0043] If it is the "2-1" type, the two-way communicating device is controlled to be in the first state and the three-way communicating device is controlled to be in the third state.

[0044] A design method for a three-way flow microchannel compact heat exchanger includes determining the angle between an X-axis flow channel and a Y-axis flow channel; determining the lengths of the X-axis flow channel, the Y-axis flow channel, and the Z-axis flow channel; and designing the corresponding three-way flow microchannel compact heat exchanger. The method includes:

[0045] Obtain thermal parameters of each heat transfer medium, including: inlet temperature , outlet temperature , allowable voltage drop ,flow ,in, , is the primary side working fluid, is the secondary side working medium, It is the tertiary side working medium;

[0046] The preset angle between the X-axis flow channel and the Y-axis flow channel is and use the average logarithmic temperature difference method to calculate the required heat transfer area , ,in, To exchange heat, is the overall heat transfer coefficient, is the temperature difference correction curve caused by cross flow, is the mean logarithmic temperature difference;

[0047] Determine whether the outlet temperature of each working fluid meets the requirements. If so, set the angle to And select the corresponding size of heat exchanger according to the heat exchange area. If it is not satisfied, reduce the angle to ;

[0048] The required heat exchange area is calculated again using the average logarithmic temperature difference method , ;

[0049] Determine whether the outlet temperature of each working fluid meets the requirements. If so, set the angle to ; If the outlet temperature requirement is not met, continue to iterate the angle Until satisfied;

[0050] Determine the flow area based on the total number of X-axis flow channels, Y-axis flow channels, and Z-axis flow channels and the flow area corresponding to each flow channel;

[0051] Based on the flow area, the flow rate of each working fluid is calculated, and the pressure drop along the process is calculated to determine whether the pressure drop along the process of each working fluid meets the requirements. If so, the design is completed; if not, the cover plate, X-axis flow channel plate and Y-axis flow channel plate are changed and the flow area is recalculated until the design is completed.

[0052] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0053] The multifunctional three-way flow microchannel compact heat exchanger provided by the present invention realizes efficient flow heat exchange of multiple working fluids in three directions through the stacking and welding of upper and lower cover plates and several layers of X-axis flow channel plates and Y-axis flow channel plates in the middle, and adopts two-way and three-way communicating vessels to flexibly adjust the flow and direction of the working fluid. It has a compact structure and strong adaptability, can meet the heat exchange needs of multiple working fluids at the same time, effectively improves the heat exchange efficiency, reduces the equipment volume and operating costs, and is widely applicable to nuclear power plants, thermal power plants, aircraft engines and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation of the embodiments of the present invention.

[0055] Figure 1 It is a schematic diagram of the overall structure of a three-way microchannel plate heat exchanger according to the present invention.

[0056] Figure 2 Schematic diagram of the structure of the inlet and outlet components according to the present invention.

[0057] Figure 3 Schematic diagram of an explosion of the heat exchange assembly according to the present invention.

[0058] Figure 4 It is a schematic top view of an orthogonal heat exchange component according to the present invention.

[0059] Figure 5 It is a schematic structural diagram of an orthogonal X-axis flow channel plate and head and an orthogonal Y-axis flow channel plate and head according to the present invention.

[0060] Figure 6 This is a schematic top view of an oblique heat exchange component according to the present invention.

[0061] Figure 7 It is a schematic structural diagram of an oblique X-axis flow channel and head and an orthogonal Y-axis flow channel plate and head according to the present invention.

[0062] Figure 8 It is a schematic top view of another oblique heat exchange component according to the present invention.

[0063] Figure 9 It is a schematic structural diagram of another oblique X-axis flow channel plate and head and an orthogonal Y-axis flow channel plate and head according to the present invention.

[0064] Figure 10 This is a schematic diagram of a "1-1-1" method of using a three-way microchannel plate heat exchanger according to the present invention.

[0065] Figure 11 This is a schematic diagram of a "2-1" method of using a three-way microchannel plate heat exchanger according to the present invention.

[0066] Figure 12 It is a structural schematic diagram of a two-way communicating vessel in an inlet and outlet assembly of a three-way microchannel plate heat exchanger according to the present invention.

[0067] Figure 13 It is a structural schematic diagram of a three-way communicating vessel in an inlet and outlet assembly of a three-way microchannel plate heat exchanger according to the present invention.

[0068] Figure 14 The present invention is a flow chart of a microchannel design method for a three-way microchannel plate heat exchanger.

[0069] Figure 15 It is a schematic diagram of the decomposition of the oblique microchannel flow in the microchannel design method of a three-way microchannel plate heat exchanger according to the present invention.

[0070] Figure markings: 100-heat exchange assembly, 200-inlet and outlet assembly, 1-heat exchange core, 2-first interface, 3-second interface, 4-third interface, 5-pipe, 6-head, 7-cover, 8-Y-axis flow plate, 81-Y-axis flow channel, 9-X-axis flow plate, 91-X-axis flow channel, 10-Z-axis flow channel, 21-two-way communicating vessel, 22-three-way communicating vessel, 23-annular pipe, 24-inlet and outlet pipes, 122-secondary side collecting channel, 211-adjusting handwheel, 212-ball head, 213-axis sealing layer, 214-ball head sealing layer, 215-channel. DETAILED DESCRIPTION

[0071] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the relevant content and are not intended to limit the present invention.

[0072] It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0073] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0074] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0075] In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0076] Example 1

[0077] like Figure 1 As shown, a three-way flow microchannel compact heat exchanger is provided, including: a heat exchange component 100 and an inlet and outlet component 200, wherein an X-axis flow channel 91, a Y-axis flow channel 81 and a Z-axis flow channel 10 are provided in the heat exchange component 100, and the inlet and outlet component 200 is connected to the inlet and outlet of the X-axis flow channel 91 and the inlet and outlet of the Y-axis flow channel 81; in the present invention, the X-axis flow channel 91 is set as the primary side (the Aa flow channel in the figure), the Y-axis flow channel 81 is set as the secondary side (the Bb flow channel in the figure), and the Z-axis flow channel 10 is set as the tertiary side (the Cc flow channel in the figure), that is, the primary side working medium is the working medium flowing through the X-axis flow channel 91, the secondary side working medium is the working medium flowing through the Y-axis flow channel 81, and the tertiary side working medium is the working medium flowing through the Z-axis flow channel 10.

[0078] The heat exchange assembly 100 is used to realize a highly efficient flow and heat exchange process of multiple working fluids in three directions in space, and to ensure the integrity of the pressure boundaries of the multiple working fluids without leakage or cross-flow.

[0079] The inlet and outlet assembly 200 is used to guide various working fluids into or out of the heat exchange assembly 100, or to change the direction of the working fluids flowing through the heat exchange assembly 100, and can also achieve separate flow regulation of the various working fluids.

[0080] like Figure 2 As shown, the inlet and outlet assembly 200 includes: an annular pipe 23, an inlet and outlet connecting pipe 24 and a switch assembly.

[0081] The inlet and outlet of the X-axis flow channel 91 and the inlet and outlet of the Y-axis flow channel 81 are both connected to the interior of the annular tube 23; the four inlet and outlet pipes 24 are all connected to the interior of the annular tube 23, and are distributed corresponding to the inlet and outlet of the X-axis flow channel 91 and the inlet and outlet of the Y-axis flow channel 81; the switch assembly is arranged in the annular tube 23 and is located at the connection between the inlet and outlet pipes 24 and the inlet and outlet of the X-axis flow channel 91 or the inlet and outlet of the Y-axis flow channel 81.

[0082] Annular tube 23 connects to X-axis flow channel 91 and Y-axis flow channel 81, and a switch assembly controls the on / off connection with heat exchange assembly 100. Annular tube 23 and inlet and outlet pipes 24 are welded together, and switch assemblies are placed inside the pipes at the four joints. Finally, the entire assembly is placed over the exterior of heat exchange assembly 100 and welded to pipe 5 of heat exchange assembly 100, forming a single unit. Only the switch assembly can rotate.

[0083] Example 2

[0084] like Figure 3 As shown, the left side is a structural diagram and the right side is an exploded view. The heat exchange component 100 includes: a heat exchange core 1 and an interface component.

[0085] The heat exchange core 1 has a first side surface, a second side surface, a third side surface, a fourth side surface, a fifth side surface and a sixth side surface, wherein the first side surface is opposite to the second side surface, the third side surface is opposite to the fourth side surface, and the fifth side surface is opposite to the sixth side surface.

[0086] The interface assembly is fixedly connected to the first side surface, the second side surface, the third side surface, the fourth side surface, the fifth side surface and the sixth side surface, and is sealed with the side surface of the heat exchange core 1;

[0087] Among them, multiple X-axis flow channels 91, Y-axis flow channels 81 and Z-axis flow channels 10 are arranged inside the heat exchange core 1. The X-axis flow channel 91 penetrates and connects the first side and the second side, the Y-axis flow channel 81 penetrates and connects the third side and the fourth side, and the Z-axis flow channel 10 penetrates and connects the fifth side and the sixth side. The X-axis flow channel 91, the Y-axis flow channel 81 and the Z-axis flow channel 10 are not connected.

[0088] The three flow channels are arranged perpendicular to each other and are not connected, so as to realize three-way heat exchange and enable the flow of up to three different working fluids in the heat exchanger.

[0089] Through the interface assembly, cold mass or hot mass can be introduced into the X-axis flow channel 91 , the Y-axis flow channel 81 and the Z-axis flow channel 10 to realize the heat exchange function.

[0090] This embodiment illustrates the specific structure of the interface receiver, and sets the interface component to include: a first interface 2 connected to the first side, a second interface 3 connected to the second side, a third interface 4 connected to the third side, a fourth interface connected to the fourth side, a fifth interface connected to the fifth side, and a sixth interface connected to the sixth side.

[0091] The above six interfaces all have similar structures. The purpose of the interfaces is to connect the flow channels and maintain sealing to prevent the working fluid from flowing out from the side of the heat exchange core 1.

[0092] like Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown, the first interface 2, the second interface 3, the third interface 4, the fourth interface, the fifth interface, and the sixth interface all include: a head 6 and a pipe 5;

[0093] The head 6 is a shell covering the X-axis flow channel 91, the Y-axis flow channel 81, and the Z-axis flow channel 10, and the head 6 is sealed and connected to the side of the heat exchange core 1, one end of the connecting pipe 5 is sealed and connected to the head 6, and the connecting pipe 5 is connected to the interior of the head 6.

[0094] The end cap 6 is a shell that encloses the X-axis flow channel 91, the Y-axis flow channel 81, and the Z-axis flow channel 10. The end cap 6 is sealed to the side of the heat exchange core 1. One end of the pipe 5 is sealed to the end cap 6, and the pipe 5 and the interior of the end cap 6 are in communication. The pipe 5 and the end cap 6 can be made of not only stainless steel but also metal materials such as carbon steel and titanium alloy, and non-metallic materials such as ceramics. The connection between the pipe 5 and the end cap 6 can be made using various welding methods including argon arc welding, brazing, and plasma welding, or a mechanical connection method using threaded engagement.

[0095] The shape of the head 6 includes various geometric shapes such as flap type, cylindrical, square, etc., as long as the wall thickness meets the pressure requirements. In addition, the number and position of the pipes 5 on the head 6 are not just one and located in the center. There can be multiple pipes 5 or they can be located in an eccentric position.

[0096] Of course, a gap needs to be provided between the inner side surface of the head 6 and the side surface of the heat exchange core 1 so that the working medium entering through the interface can flow into multiple flow channels.

[0097] Example 3

[0098] The heat exchange core 1 includes: a cover plate 7, an X-axis flow channel plate 9, and a Y-axis flow channel plate 8; multiple X-axis flow channel plates 9 and multiple Y-axis flow channel plates 8 are stacked and arranged between two cover plates 7, multiple X-axis flow channels 91 are arranged on the upper side of the X-axis flow channel plate 9, and multiple Y-axis flow channels 81 are arranged on the upper side of the Y-axis flow channel plate 8;

[0099] The Z-axis flow channel 10 is a plurality of through holes coaxially arranged and passing through the cover plate 7, the X-axis flow channel plate 9 and the Y-axis flow channel plate 8. The through holes are circular holes, rectangular holes, semicircular holes or special-shaped holes.

[0100] In fact, the X-axis flow plate 9 and the Y-axis flow plate have the same structure. The difference lies in the different placement angles. The cover plate 7, the X-axis flow plate 9 and the Y-axis flow plate 8 are all metal plates of the same size. The cover plate 7 is only placed on the top and bottom, and the middle is all flow plates. The flow plate materials include stainless steel, carbon steel, ceramics and other machinable materials.

[0101] The X-axis flow channel 91 is a flow channel groove arranged on the upper side of the X-axis flow channel plate 9, and the Y-axis flow channel 81 is a flow channel groove arranged on the upper side of the Y-axis flow channel plate 8; the flow channel groove is an arc groove, a rectangular groove or a special-shaped groove, and in the length direction of the flow channel, the flow channel groove is a straight line, an S shape or a sine curve shape; and forms a through flow channel with the adjacent flow channel plates.

[0102] The X-axis flow channel plate 9 and the Y-axis flow channel plate 8 are arranged periodically in sequence, that is, they include various periodic arrangement forms such as "I-II-I" and "I-II-II-I".

[0103] The upper side of the X-axis flow channel plate 9 is sealed and connected to the lower side of the previous flow channel plate to form an X-axis flow channel 91. The Y-axis offset between two adjacent X-axis flow channels 91 is 0.5-10 mm.

[0104] The upper side of the Y-axis flow channel plate 8 is sealed and connected to the lower side of the previous flow channel plate to form a Y-axis flow channel 81 . The two adjacent Y-axis flow channels 81 are offset in the X direction by 0.5-10 mm.

[0105] The flow channel groove is processed by machining or chemical etching, and the cover plate 7, the X-axis flow channel plate 9 and the Y-axis flow channel plate 8 are processed by vacuum diffusion welding.

[0106] In actual production, a large number of flow channels can be processed on metal sheets using layered forming technology or chemical etching, mechanical cutting and other methods according to the design to obtain X-axis flow channel plates 9, Y-axis flow channel plates 8 and cover plates 7, and then Z-axis flow channels 10 can be processed on the plates; the X-axis flow channel plates 9, Y-axis flow channel plates 8 and cover plates 7 are further stacked in sequence and strictly aligned, and are integrally formed into a heat exchange core 1 through high-temperature vacuum diffusion welding; at the same time, multiple groups of pipes 5 and heads 6 belonging to multiple working fluids are connected to each other through welding, and the inlet and outlet pipes 24 and heads 6 are respectively welded to the heat exchange core 1 to obtain the finished product.

[0107] like Figure 4 and Figure 5As shown, in this embodiment, the primary side microchannel is a straight semicircular flow channel in the X direction, and the secondary side microchannel is a straight semicircular flow channel in the Y direction. They form a closed space with the metal surfaces of the adjacent flow channel plates. The tertiary side microchannel holes at the same position on the XY plane are circular holes with the center of the overlapping area as the center of the circle after the metal wall surfaces of the microchannels on both sides are projected in the Z direction. After a large number of flow channel plates are stacked, a closed space of circular microchannels in the Z direction is formed for the flow of tertiary side working fluids. Therefore, at most three working fluids can flow and exchange heat in the space.

[0108] like Figure 6 and Figure 7 As shown, the direction of the secondary side microchannel may not be parallel to the Y axis, but may be a group of parallel lines in any direction on the XY plane. At this time, there are two Y-direction microchannels on both sides of the Y-axis flow channel plate 8 as the secondary side collecting channels 122, which are responsible for connecting all the secondary side microchannels intersecting therewith to achieve uniform distribution of the secondary side working fluid flow on the entire flow channel plate. This arrangement can also achieve efficient flow and heat exchange between the primary and secondary side working fluids and the tertiary side working fluids. The arrangement method of the tertiary side microchannel holes is the same as above.

[0109] like Figure 8 and Figure 9 As shown, the shapes of the X-axis flow channel plate 9, the Y-axis flow channel plate 8 and the cover plate 7 can also be changed to any parallelogram, and the sides in two directions are parallel to the primary side microchannel and the secondary side microchannel respectively. This arrangement omits the secondary side collecting channel 122, and each secondary side microchannel is completely parallel and equal in length. In principle, the problem of uneven flow distribution between each microchannel is eliminated, which can improve the flow and heat transfer capacity of the heat exchanger.

[0110] Example 4

[0111] To achieve installation and on / off control of the switch assembly, the pipe 5 of the first interface 2, the pipe 5 of the second interface 3, the pipe 5 of the third interface, and the pipe 5 of the fourth interface are all connected to and communicate with the annular pipe 23, and the pipe 5 is coaxially arranged with its corresponding inlet and outlet pipes 24;

[0112] like Figure 12As shown, the switch assembly includes: two two-way communicating vessels 21 and two three-way communicating vessels 22. The two-way communicating vessels 21 and the three-way communicating vessels 22 include: a ball head 212 arranged in the annular tube 23 and an adjusting handwheel 211 arranged outside the annular tube 23 and connected to the ball head 212. The ball head 212 is located at the intersection of the connecting pipe 5, the inlet and outlet connecting pipes 24 and the annular tube 23. In order to control the on and off, it is necessary to ensure the sealing. The ball head 212 is dynamically sealed at the connection between the annular tube 23, the connecting pipe 5 and the inlet and outlet connecting pipes 24. The adjusting handwheel 211 is fixedly connected to the ball head 212 through a rotating shaft. The rotating shaft passes through the annular tube 23 and is sealed with the annular tube 23. The outer side surface of the ball head 212 is provided with a ball head sealing layer 214, and the outer side surface of the rotating shaft is provided with a shaft sealing layer 213.

[0113] The structures of the two-way communicating vessel 21 and the three-way communicating vessel 22 are basically the same. The difference is whether the channel 215 in the ball head 212 is a straight line connecting two directions or a T-shaped channel connecting three directions. The diameter of the ball head 212 is similar to the inner diameter of the annular tube 23. The adjusting handwheel 211 is inserted into the top of the ball head 212 and welded to fix it so that it does not slide relative to each other. Then, the shaft sealing layer 213 and the ball head sealing layer 214 are respectively put on the rotating shaft of the adjusting handwheel 211 and the upper and lower parts of the ball head 212. After the communicating vessel is placed in the annular tube 23, due to the presence of the sealing layer, the working fluid will not leak from a position outside the channel 215. The ball head 212 inside the inlet and outlet assembly 200 can be rotated by rotating the adjusting handwheel 211.

[0114] One of the two-way communicating vessels 21 is set at the fourth interface, and the other two-way communicating vessel 21 is set at the second interface 3; one of the three-way communicating vessels 22 is set at the first interface 2, and the other two-way communicating vessel 21 is set at the third interface 4; that is, the two ends of the primary side channel and the secondary side channel are respectively connected to a two-way communicating vessel 21 and a three-way communicating vessel 22.

[0115] In order to achieve the function of two-way connection or three-way connection, a "I"-shaped through hole is provided in the ball head 212 of the two-way connecting device 21, and a "T"-shaped through hole is provided in the ball head 212 of the three-way connector; the plane where the "I"-shaped through hole and the "T"-shaped through hole are located coincides with the plane where the annular tube 23 is located.

[0116] When the ball head 212 rotates, the two-way communicating vessel 21 has a first state and a second state; the three-way communicating vessel 22 has a first state, a second state and a third state;

[0117] When the bidirectional communicating vessel 21 is in the first state, the "I"-shaped through hole connects the connecting pipe 5 and the inlet and outlet connecting pipes 24;

[0118] When the bidirectional communicating vessel 21 is in the second state, the “I”-shaped through hole is connected to the annular tube 23 ; at this time, the bidirectional communicating vessel is in a closed state.

[0119] When the three-way connecting pipe 22 is in the first state, the "T"-shaped through hole connects the connecting pipe 5, the inlet and outlet connecting pipes 24 and the annular pipe 23;

[0120] When the three-way connecting tube 22 is in the second state, the "T"-shaped through hole connects the inlet and outlet pipes 24 and the annular pipe 23;

[0121] When the three-way communicating vessel 22 is in the third state, the “T”-shaped through hole connects the connecting pipe 5 and the annular pipe 23 , and the three-way communicating vessel 22 is in a closed state.

[0122] Example 5

[0123] like Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 and Figure 15 As shown, a method for using a three-way flow microchannel compact heat exchanger is provided. Based on the above three-way flow microchannel compact heat exchanger, the method for using includes:

[0124] Determine the heat dissipation method, "1-1-1" or "2-1";

[0125] The "1-1-1" formula is: two different working fluids are used on the primary and secondary sides, and are cooled / heated by the working fluid on the tertiary side at the same time. The straight flow channel of the three-way communicating vessel 22 (22) of the working fluid on the primary and secondary sides is rotated to open (first state). At this time, the two working fluids flow through the heat exchanger independently, which is suitable for energy transfer between the three working fluids.

[0126] The "2-1" formula is: the primary and secondary sides use the same working fluid, which is cooled / heated by the tertiary side working fluid. The two-way communicating vessels 21 of the primary and secondary side working fluids are opened, and the 90° bent flow channel of the three-way communicating vessels 22 of the primary and secondary side working fluids is rotated to open (the second state). At this time, the working fluid flows through the heat exchanger in the X-axis flow channel 91, and then switches to the Y-axis flow channel 81 through the three-way communicating vessel 22 to flow through the heat exchanger again, exchanging heat with the tertiary side working fluid twice, which is suitable for efficient energy transfer between the two working fluids.

[0127] The method for determining the heat dissipation method includes: judging and, if yes, using the "1-1-1" formula; if no, using the "2-1" formula; wherein, is the heat of the tertiary side working medium, is the specific heat capacity of the tertiary side working medium, is the specific heat capacity of the primary side working medium, the tertiary side working medium is the working medium flowing through the Z-axis flow channel 10, the primary side working medium is the working medium flowing through the X-axis flow channel 91, and the secondary side working medium is the working medium flowing through the Y-axis flow channel 81;

[0128] If it is "1-1-1", the two-way communicating device 21 is controlled to be in the first state, and the three-way communicating device 22 is controlled to be in the first state;

[0129] If it is the “2-1” formula, the two-way manifold 21 is controlled to be in the first state, and the three-way manifold 22 is controlled to be in the third state.

[0130] The specific method is:

[0131] like Figure 10 As shown, if the "1-1-1" mode is used, first rotate the two-way communicating vessel 21 connecting the primary side working fluid inlet (a) and the secondary side working fluid inlet (b) to the first state, and then rotate the three-way communicating vessel 22 connecting the primary side working fluid outlet (A) and the secondary side working fluid outlet (B) to the first state. After the primary and secondary side working fluids enter, they can cross into the heat exchanger for flow heat exchange and flow out. This mode is suitable for situations where the tertiary side working fluid has a large specific heat capacity and a large heat content or cooling capacity, and two working fluids are required to cool or heat it at the same time.

[0132] like Figure 11 As shown, if the "2-1" mode is used, first rotate the two-way communicating tube 21 connecting the primary side working fluid inlet (a) and the secondary side working fluid inlet (b) to the first state, and then rotate the three-way communicating tube 22 connecting the primary side working fluid outlet (A) and the secondary side working fluid outlet (B) to the third state. At this time, the primary side working fluid enters the first three-way communicating tube 22 along the X direction, turns 90°, enters the second three-way communicating tube 22, and then turns 90° to enter the heat exchanger again along the Y direction, realizing two-pass heat exchange with the tertiary side working fluid. This mode is suitable for situations where the specific heat capacity of the tertiary side working fluid is small and the heat content or cooling capacity is small. It is necessary to guide the working fluid on the XY plane to enter the heat exchanger multiple times to obtain sufficient heat or cooling capacity from the tertiary side working fluid.

[0133] Example 6

[0134] like Figure 12 、 Figure 13 、 Figure 14 and Figure 15 As shown, a design method for a three-way flow microchannel compact heat exchanger is provided, namely, determining the angle between the X-axis flow channel and the Y-axis flow channel; determining the lengths of the X-axis flow channel, the Y-axis flow channel, and the Z-axis flow channel; and designing a corresponding three-way flow microchannel compact heat exchanger;

[0135] Obtain the thermal parameters of each heat exchange working fluid, including inlet temperature, outlet temperature, allowable pressure drop, flow rate, etc.; then preliminarily select the flow angle of the primary and secondary side working fluids as 90°, and the shape of the flow channel plate as a rectangle; next, use the average logarithmic temperature difference method to calculate the required heat exchange area according to the inlet and outlet parameters, and under the premise that cross flow is adopted between the working fluids, calculate whether the outlet temperature of each working fluid meets the input requirements. If it does, proceed to the next step. If not, use the flow decomposition method to calculate the maximum value of the flow angle α of the primary and secondary side working fluids (α<180°), and then recalculate the required heat exchange area and check until it meets the requirements; next, calculate the required flow area, and use the widely used flow relationship to check whether the pressure drop of each working fluid meets the requirements. If not, change the shape of the flow channel plate to a parallelogram parallel to the direction of the microchannel to reduce the flow resistance, and iterate until the requirements are met. At this point, the microchannel design is completed.

[0136] Specific methods include:

[0137] Obtain thermal parameters of each heat transfer medium, including: inlet temperature , outlet temperature , allowable voltage drop ,flow ,in, , is the primary side working fluid, is the secondary side working medium, It is the tertiary side working medium;

[0138] The preset angle between the X-axis flow channel and the Y-axis flow channel is , and the shape of the channel plate is rectangular, and the average logarithmic temperature difference method is used to calculate the required heat transfer area , ,in, To exchange heat, is the overall heat transfer coefficient (obtained by searching the engineering manual based on the working fluid type), is the temperature difference correction curve caused by cross flow ( and function, which is always less than 1 and can be obtained by looking up the diagram in the engineering manual). is the mean logarithmic temperature difference;

[0139] Determine whether the outlet temperature of each working fluid meets the requirements. If so, set the angle to And select the corresponding size of heat exchanger according to the heat exchange area. If it is not satisfied (indicating that the current heat exchange capacity is still insufficient), reduce the angle to When the flow angle between the primary and secondary sides is not 90°, the flow decomposition method should be used to solve the problem: the flow direction of a certain working fluid is decomposed and the flow direction is perpendicular or in the same direction as the flow direction of another working fluid. The flow values ​​are respectively the original flow values. and times, and then consider the cross flow and countercurrent (or cocurrent) heat exchange between the "sub-fluids" under these two flow rates and another working fluid respectively. The two heat transfer rates are added together to obtain the actual heat transfer rate of the working fluid. Under the premise that the rated heat transfer rate is known, the angle can be calculated to complete the heat transfer design.

[0140] When the flow angle between the primary and secondary working fluids is any When the flow direction of the primary side working medium (a / A) is taken as the horizontal axis and the vertical direction as the vertical axis, the flow rate of the secondary side working medium (b / B) is , the angle between the direction and the horizontal axis is ,Will Decomposed into horizontal axis and vertical ,at this time and It is a co-current counter-current heat exchange, and its heat transfer capacity is stronger than that of cross-flow heat exchange. and It is still a cross-flow heat exchange, which is equivalent to increasing the partial heat transfer capacity. At this time, the average logarithmic temperature difference method is used to calculate the required heat transfer area. , ;

[0141] Determine whether the outlet temperature of each working fluid meets the requirements. If so, set the angle to ; If the outlet temperature requirement is not met, continue to iterate the angle Until satisfied;

[0142] The flow area is determined based on the total number of X-axis flow channels, Y-axis flow channels, and Z-axis flow channels and the flow area corresponding to each flow channel. The specific method includes:

[0143] Determine the number of X-axis flow plate, the number of microchannels on a single flow plate, and the flow area corresponding to a single microchannel;

[0144] The size of a single channel plate and the width of the ribs between channels are preset according to thermal parameters (design temperature and design pressure of each working fluid) and based on public mechanical design criteria (such as pressure vessel standards such as GB150).

[0145] Then, based on the size of the flow channel plate, processing limit, microchannel size and rib wall width between microchannels, the number of microchannels on a single flow channel plate is determined (that is, the number of X-axis flow channels and Y-axis flow channels, and the number of Z-axis flow channels is determined based on the overlapping X-axis flow channel plates and Y-axis flow channel plates). The number is multiplied by the area of ​​a single flow channel (that is, the cross-sectional perimeter multiplied by the microchannel length) to obtain the heat exchange area A0 of a single flow channel plate. Then, the number of flow channel plates can be determined = A / A0.

[0146] According to the preset number of microchannels on a single flow channel plate and based on the cross-sectional size of the microchannel (taking a semicircle as an example, the diameter is d), the flow area of ​​a single microchannel can be obtained = π / 8*d 2 , multiplied by the number of microchannels and the number of required flow plates, the flow area of ​​the heat exchanger can be obtained.

[0147] Based on the flow area, the flow rate of each working fluid can be calculated, and the pressure drop along the process can be calculated according to the commonly used formula to determine whether the pressure drop along the process of each working fluid meets the requirements. If so, the design is completed; if not, the cover plate, X-axis flow plate and Y-axis flow plate are changed and the flow area is recalculated until the design is completed.

[0148] Widely used flow relationships such as the DB relationship and the Blasius relationship are used to calculate the pressure drop along the flow path of each working fluid and compare whether it is less than or equal to the allowable pressure drop. If the requirements are not met, the flow channel plate is changed from a rectangle to a parallelogram, and the local resistance is reduced by omitting the secondary side collector until the requirements are met. At this point, the design of all microchannels is completed.

[0149] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0150] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0151] It should be understood by those skilled in the art that the above embodiments are merely for the purpose of illustrating the present invention clearly, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. A three-way flow microchannel compact heat exchanger, characterized in that: include: A heat exchange component (100) and an inlet and outlet component (200), wherein an X-axis flow channel (91), a Y-axis flow channel (81), and a Z-axis flow channel (10) are provided in the heat exchange component (100), and the inlet and outlet component (200) is in communication with the inlet and outlet of the X-axis flow channel (91) and the inlet and outlet of the Y-axis flow channel (81); The inlet and outlet assembly (200) comprises: an annular tube (23), wherein the inlet and outlet of the X-axis flow channel (91) and the inlet and outlet of the Y-axis flow channel (81) are both in communication with the interior of the annular tube (23); Inlet and outlet pipes (24), the four inlet and outlet pipes (24) are all in communication with the interior of the annular pipe (23), and are arranged to correspond to the inlet and outlet of the X-axis flow channel (91) and the inlet and outlet of the Y-axis flow channel (81); a switch assembly, which is arranged in the annular tube (23) and is located at the connection between the inlet and outlet pipes (24) and the inlet and outlet of the X-axis flow channel (91) or the inlet and outlet of the Y-axis flow channel (81); The heat exchange component (100) comprises: A heat exchange core (1) having a first side surface, a second side surface, a third side surface, a fourth side surface, a fifth side surface and a sixth side surface, wherein the first side surface is arranged opposite to the second side surface, the third side surface is arranged opposite to the fourth side surface, and the fifth side surface is arranged opposite to the sixth side surface; An interface component, the interface component is fixedly connected to the first side surface, the second side surface, the third side surface, the fourth side surface, the fifth side surface and the sixth side surface, and is sealed with the side surface of the heat exchange core (1); The heat exchange core (1) is provided with the X-axis flow channel (91), the Y-axis flow channel (81) and the Z-axis flow channel (10), the X-axis flow channel (91) penetrates and connects the first side surface and the second side surface, the Y-axis flow channel (81) penetrates and connects the third side surface and the fourth side surface, the Z-axis flow channel (10) penetrates and connects the fifth side surface and the sixth side surface, and the X-axis flow channel (91), the Y-axis flow channel (81) and the Z-axis flow channel (10) are not connected.

2. The three-way flow microchannel compact heat exchanger according to claim 1, characterized in that: The interface assembly is configured to include: a first interface (2) connected to the first side surface, a second interface (3) connected to the second side surface, a third interface (4) connected to the third side surface, a fourth interface connected to the fourth side surface, a fifth interface connected to the fifth side surface, and a sixth interface connected to the sixth side surface; The first interface (2), the second interface (3), the third interface (4), the fourth interface, the fifth interface, and the sixth interface all include: a sealing head (6) and a connecting pipe (5); The head (6) is a shell covering the X-axis flow channel (91), the Y-axis flow channel (81), and the Z-axis flow channel (10), and the head (6) is sealed and connected to the side of the heat exchange core (1), one end of the connecting pipe (5) is sealed and connected to the head (6), and the connecting pipe (5) is communicated with the interior of the head (6).

3. The three-way flow microchannel compact heat exchanger according to claim 1, characterized in that: The heat exchange core (1) comprises: a cover plate (7), an X-axis flow channel plate (9) and a Y-axis flow channel plate (8); A plurality of the X-axis flow channel plates (9) and a plurality of the Y-axis flow channel plates (8) are stacked and arranged between the two cover plates (7), a plurality of the X-axis flow channels (91) are arranged on the upper side of the X-axis flow channel plate (9), and a plurality of the Y-axis flow channels (81) are arranged on the upper side of the Y-axis flow channel plate (8); The Z-axis flow channel (10) is a plurality of through holes coaxially arranged and penetrating the cover plate (7), the X-axis flow channel plate (9) and the Y-axis flow channel plate (8).

4. The three-way flow microchannel compact heat exchanger according to claim 3, characterized in that: The X-axis flow channel (91) is a flow channel groove provided on the upper side of the X-axis flow channel plate (9), and the Y-axis flow channel (81) is a flow channel groove provided on the upper side of the Y-axis flow channel plate (8); The flow channel groove is an arc groove, a rectangular groove or a special-shaped groove. In the length direction of the flow channel, the flow channel groove is a straight line, an S shape or a sine curve shape; the through hole is a circular hole, a rectangular hole, a semicircular hole or a special-shaped hole; The X-axis flow channel plate (9) and the Y-axis flow channel plate (8) are periodically arranged in sequence; The upper side of the X-axis flow channel plate (9) is sealed and connected to the lower side of the previous flow channel plate to form the X-axis flow channel (91), and the Y-direction offset between two adjacent X-axis flow channels (91) is 0.5-10 mm; The upper side of the Y-axis flow channel plate (8) is sealed and connected to the lower side of the previous flow channel plate to form the Y-axis flow channel (81), and the X-direction offset between two adjacent Y-axis flow channels (81) is 0.5-10 mm.

5. The three-way flow microchannel compact heat exchanger according to claim 2, characterized in that: The pipe (5) of the first interface (2), the pipe (5) of the second interface (3), the pipe (5) of the third interface (4), and the pipe (5) of the fourth interface are all connected to and communicate with the annular tube (23), and are all coaxially arranged with the corresponding inlet and outlet pipes (24); The switch assembly comprises: two two-way communicating vessels (21) and two three-way communicating vessels (22); the two-way communicating vessels (21) and the three-way communicating vessels (22) comprise: a ball head (212) disposed inside the annular tube (23) and an adjusting hand wheel (211) disposed outside the annular tube (23) and connected to the ball head (212); the ball head (212) is located at the intersection of the connecting pipe (5), the inlet and outlet connecting pipes (24), and the annular tube (23); One of the two-way communicating devices (21) is arranged at the fourth interface, and the other one of the two-way communicating devices (21) is arranged at the second interface (3); One of the three-way communicating devices (22) is arranged at the first interface (2), and the other two-way communicating device (21) is arranged at the third interface (4); A "I"-shaped through hole is provided in the ball head (212) of the two-way communicating vessel (21), and a "T"-shaped through hole is provided in the ball head (212) of the three-way connector; the plane where the "I"-shaped through hole and the "T"-shaped through hole are located coincides with the plane where the annular tube (23) is located.

6. The three-way flow microchannel compact heat exchanger according to claim 5, characterized in that: The two-way communicating vessel (21) has a first state and a second state; the three-way communicating vessel (22) has a first state, a second state and a third state; When the bidirectional connecting vessel (21) is in the first state, the "I"-shaped through hole connects the connecting pipe (5) and the inlet and outlet connecting pipes (24); When the bidirectional communicating vessel (21) is in the second state, the "I"-shaped through hole is connected to the annular tube (23); When the three-way connecting vessel (22) is in the first state, the "T"-shaped through hole connects the connecting pipe (5), the inlet and outlet connecting pipes (24) and the annular pipe (23); When the three-way connecting vessel (22) is in the second state, the "T"-shaped through hole connects the inlet and outlet connecting pipes (24) and the annular pipe (23); When the three-way connecting vessel (22) is in the third state, the "T"-shaped through hole connects the connecting pipe (5) and the annular pipe (23).

7. The three-way flow microchannel compact heat exchanger according to claim 5, characterized in that: The ball head (212) is dynamically sealed at the connection between the annular tube (23), the connecting pipe (5) and the inlet and outlet connecting pipes (24); the adjusting hand wheel (211) is fixedly connected to the ball head (212) via a rotating shaft; the rotating shaft passes through the annular tube (23) and is sealed to the annular tube (23); a ball head sealing layer (214) is provided on the outer side surface of the ball head (212); and a shaft sealing layer (213) is provided on the outer side surface of the rotating shaft.

8. A method for using a three-way flow microchannel compact heat exchanger, characterized in that: Based on a three-way flow microchannel compact heat exchanger according to any one of claims 1 to 7, the method of use comprises: Determine the heat dissipation method, "1-1-1" or "2-1"; the method is: judge and If yes, then use the "1-1-1" formula; if no, use the "2-1" formula; where, is the heat of the working fluid on the tertiary side, is the specific heat capacity of the tertiary side working fluid, is the specific heat capacity of the primary side working medium, the tertiary side working medium is the working medium flowing through the Z-axis flow channel, the primary side working medium is the working medium flowing through the X-axis flow channel, and the secondary side working medium is the working medium flowing through the Y-axis flow channel; If it is "1-1-1", the two-way communicating device is controlled to be in the first state and the three-way communicating device is controlled to be in the first state; If it is "2-1", the two-way communicating device is controlled to be in the first state and the three-way communicating device is controlled to be in the third state.

9. A design method for a three-way flow microchannel compact heat exchanger, characterized in that: For designing a three-way flow microchannel compact heat exchanger as claimed in any one of claims 1 to 7, determining the angle between the X-axis flow channel and the Y-axis flow channel; Determine the lengths of the X-axis flow channel, the Y-axis flow channel, and the Z-axis flow channel; And design a corresponding three-way flow microchannel compact heat exchanger; the method includes: Obtain thermal parameters of each heat transfer medium, including: inlet temperature , outlet temperature , allowable voltage drop ,flow ,in, , is the primary side working fluid, is the secondary side working medium, It is the tertiary side working medium; The preset angle between the X-axis flow channel and the Y-axis flow channel is and use the average logarithmic temperature difference method to calculate the required heat transfer area , ,in, To exchange heat, is the overall heat transfer coefficient, is the temperature difference correction curve caused by cross flow, is the mean logarithmic temperature difference; Determine whether the outlet temperature of each working fluid meets the requirements. If so, set the angle to And select the corresponding size of heat exchanger according to the heat exchange area. If it is not satisfied, reduce the angle to ; The required heat exchange area is calculated again using the average logarithmic temperature difference method , ; Determine whether the outlet temperature of each working fluid meets the requirements. If so, set the angle to ; If the outlet temperature requirement is not met, continue to iterate the angle Until satisfied; Determine the flow area based on the total number of X-axis flow channels, Y-axis flow channels, and Z-axis flow channels and the flow area corresponding to each flow channel; Based on the flow area, the flow rate of each working fluid is calculated, and the pressure drop along the process is calculated to determine whether the pressure drop along the process of each working fluid meets the requirements. If so, the design is completed; if not, the cover plate, X-axis flow channel plate and Y-axis flow channel plate are changed and the flow area is recalculated until the design is completed.

Images