Printed circuit board heat exchanger shunt device

Abstract

The application discloses a printed circuit board type heat exchanger shunt device, which comprises a pipeline converter, a frequency conversion equalizer and a flow channel extender connected in sequence; the pipeline converter is a hollow pipeline; the frequency conversion equalizer comprises a square hose, a square tube, a reciprocating horizontal motion mechanism and a bottom-hollow shell; the rear end of the flow channel extender is fixedly connected with a printed circuit board type heat exchanger body; fluid microchannels with diameters equal to those of microchannels in the heat exchanger body are uniformly distributed in the flow channel extender; fluid flows into the flow channel extender from the front end of the pipeline converter, flows out of the flow channel extender from the rear end and then flows into the microchannels in the heat exchanger body; and the reciprocating horizontal motion mechanism is used for accurately controlling the fluid flow direction and the shunt time of each layer of microchannels, so that the complete and uniform shunt of each layer of microchannels is realized, and the energy efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat exchangers, and particularly relates to a printed circuit board type heat exchanger flow distribution device. BACKGROUND

[0002] A printed circuit heat exchanger (PCHE) is a kind of compact plate heat exchanger with fine channels, which is formed by stacking heat exchange plates with a certain structure processed by electrochemical etching process and diffusion welding. Micro channels are formed between various plates, and working fluid flows in the micro channels formed between two plates, and a partition plate separates the fluid and exchanges heat through the plate. The PCHE has many advantages such as high temperature resistance (700℃), high pressure resistance (50MPa), super G effect (up to 98%), low pressure drop, high tightness (1 / 6-1 / 4 of traditional shell-and-tube heat exchanger), corrosion resistance, long service life, etc., and has good application potential in oil and gas industry, fuel processing, refrigeration, power industry, chemical industry and other fields.

[0003] The micro channel size of the printed circuit heat exchanger is small (the cross section is usually a semicircle with a diameter of 0.5-2.0mm), and the number is large. When the heat exchanger works, the fluid flows into each fluid channel through an inlet, and due to the influence of gravity and other factors, there is usually a problem of uneven distribution of inlet flow and fluid pressure of each micro channel, so that a large number of micro channels far from the center of the fluid inlet cannot be effectively utilized, greatly reducing the actual heat exchange efficiency, and the heat transfer deviation caused by uneven flow also easily forms internal thermal stress of the heat exchanger core, reducing the safety and stability of the heat exchanger.

[0004] In the prior art, the method for solving the uneven distribution of inlet fluid mainly adds flow guiding, flow straightening or flow disturbing structure at the fluid inlet.

[0005] Patent CN 208952771U discloses a flow guiding device inside the head of a printed circuit board heat exchanger. This device, through a perforated flow guiding plate and a flow guiding side plate installed inside the head of the heat exchanger, changes the flow field structure inside the head, uniformly distributing the fluid entering the head to each microchannel inlet of the heat exchanger core, making the fluid flow rate in each microchannel essentially equal. Patent CN 112097566 A discloses a flow rectification structure for a printed circuit board heat exchanger, solving the problem of uneven inlet flow distribution in printed circuit board heat exchangers by using an impeller and frame clamped inside the channel inlet of the heat exchanger head. Patent CN112361851B provides a printed circuit board heat exchanger with a spiral structure component installed in the inlet channel, converting the vertical flow of fluid in the inlet channel into spiral flow, reducing the angle between the fluid flow velocity direction and the heat exchange plates, and generating centrifugal force. Under centrifugal force, the fluid enters each layer of fluid channels, reducing the inlet resistance and improving the uneven flow rate in each channel. While the above solutions, including perforated plates, impellers, and helical rectifier structures, have a flow-diverting effect, they all increase fluid flow resistance to varying degrees, reduce fluid pressure at the microchannel inlet, and decrease energy efficiency. Furthermore, these solutions utilize the physical characteristics of the flow-diverting structure for spontaneous flow diversion; however, due to the limitations of the flow-diverting structure, there is still a certain difference in flow rate at the microchannel inlet far from and near the center of the fluid inlet, failing to achieve a completely uniform flow rate.

[0006] Patent CN114166047A provides a printed circuit board type heat exchanger, in which a first flow guiding structure is set at the inlet end cap of the heat exchanger body. The first flow guiding structure can bend and deform under the control of a controller, thereby maintaining a uniform flow effect under various operating conditions. The deformable flow guiding structure realizes autonomous control of the fluid pressure at the heat exchanger inlet, but the main problem solved by this structure is to make the fluid pressure the same under various operating conditions, and it does not solve the problem of uneven flow distribution at the inlet of each microchannel. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a printed circuit board type heat exchanger flow distribution device. This device offers a novel approach to uniform flow distribution in heat exchangers. It employs an automatically controlled reciprocating translational mechanism to precisely control the fluid flow direction and the flow distribution time of each microchannel layer. This not only achieves completely uniform flow distribution across each microchannel layer but also minimizes energy loss during the flow distribution process. The pipe converter also acts as a pressurizer, increasing the fluid pressure flowing into the microchannels and reducing the fluid pressure requirement at the inlet of the heat exchanger head channel, thereby improving energy efficiency.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A printed circuit board type heat exchanger flow distribution device, characterized in that it comprises: a pipe converter, a frequency converter, and a flow channel extender connected in sequence; the pipe converter is a hollow pipe; the pipe converter and the frequency converter are arranged vertically; fluid flows in from the front end of the pipe converter, flows out from the rear end of the flow channel extender, and flows into the microchannel of the heat exchanger body; the frequency converter includes a square hose, a square tube, a reciprocating translation mechanism, and a shell with a hollow bottom; a rectangular opening is opened on the top surface of the shell, the upper side of the rectangular opening is fixedly connected to the outlet of the pipe converter, and the lower side is fixedly connected to the front end of the square hose; the front end of the square tube is fixedly connected to the rear end of the square hose; the square hose and the square tube are disposed inside the shell; the reciprocating translation mechanism is fixedly connected to the square tube of the frequency converter, and is used to operate the square tube of the frequency converter to reciprocate at a uniform speed inside the shell; the flow channel extender has uniformly distributed fluid microchannels with the same diameter as the microchannel of the heat exchanger body, and corresponding one-to-one, with its front end... The end is fixedly connected to the bottom surface of the variable frequency distributor housing, and the rear end is fixedly connected to the heat exchanger body. The cross-section of the variable frequency distributor housing is the same as the cross-section of the flow channel extender, and this cross-section is larger than the cross-section of the heat exchanger body perpendicular to the fluid flow direction. The cross-sections of the variable frequency distributor square hose, the variable frequency distributor square tube, and the variable frequency distributor housing rectangular opening are the same, and the width of this cross-section is 1-2 times the microchannel diameter of the heat exchanger body, and the length of this cross-section is equal to the width of the heat exchanger body. The length direction of the variable frequency distributor square hose, the variable frequency distributor square tube, and the variable frequency distributor housing rectangular opening is parallel to the transverse array direction of the microchannels inside the flow channel extender. The reciprocating translation direction of the variable frequency distributor square tube is parallel to the longitudinal array direction of the microchannels inside the flow channel extender, and the reciprocating translation stroke is equal to the thickness of the heat exchanger body. During the reciprocating translation process, the rear end face of the variable frequency distributor square tube is parallel to the front end face of the flow channel extender, and the distance remains unchanged, the distance being 0.1-2mm.

[0010] Preferably, the pipe converter includes a front inlet circular pipe section, a rear outlet rectangular pipe section, and a transition section connecting the circular pipe section and the rectangular pipe section; the rectangular pipe section of the pipe converter has the same cross-section as the rectangular opening of the variable frequency splitter housing, and the length direction of the cross-section is parallel to the transverse array direction of the microchannels inside the flow channel extender.

[0011] More preferably, the pipe converter transition section includes a fixedly connected round pipe-square pipe transition section and a six-sided conical pipe transition section.

[0012] Preferably, several flow dividers are uniformly fixed inside the square tube of the frequency converter, and the flow dividers are arranged parallel to the fluid flow direction.

[0013] More preferably, a plurality of flow dividers are uniformly fixed inside the pipeline converter, and the flow dividers are arranged parallel to the fluid flow direction; the flow dividers of the pipeline converter correspond one-to-one with the flow dividers of the frequency converter.

[0014] Preferably, sliders are fixed on both sides of the square tube of the frequency converter, and a slide rail is fixed on the inner side of the housing of the frequency converter. The sliders are nested in the slide rail and used to guide the movement of the square tube of the frequency converter within the housing of the frequency converter.

[0015] Preferably, the reciprocating translational mechanism includes a swing voice coil motor, a ball screw, a screw nut, an operating rod, and a nut guide rail; both ends of the ball screw are supported on bearing seats, and the rear end is fixedly connected to the output shaft of the swing voice coil motor; the nut guide rail is fixed in the same direction as the ball screw, and a slider is fixed on the screw nut, the slider being nested inside the nut guide rail; the rear end of the operating rod is fixed to the screw nut, and its front end passes through a hole in the inverter distributor housing and is fixedly connected to the inverter distributor square tube; the swing voice coil motor rotates, causing the screw nut to reciprocate along the nut guide rail, thereby driving the inverter distributor square tube at the front end of the operating rod to reciprocate.

[0016] More preferably, the cross-section of the variable frequency splitter square hose, the variable frequency splitter square tube, and the rectangular opening of the variable frequency splitter housing is one of the following: waist-shaped, rectangular, or chamfered rectangular.

[0017] Preferably, the flow channel extender is a circular arc bend structure.

[0018] Preferably, the pipe converter, flow channel extender, frequency converter square tube, and frequency converter housing are made of stainless steel.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention employs a reciprocating translational mechanism of a lead screw and nut controlled by a swing voice coil motor to precisely control the fluid flow direction and the diversion time of each layer of microchannels, resulting in high diversion accuracy.

[0021] 2. This invention employs a vertically arranged pipe converter and frequency converter, and by switching the cross-section of the pipe converter, it increases the fluid pressure and improves the fluid dynamics; the inlet section of the pipe converter uses a circular pipe to improve the adaptability of the diversion device, and the outlet section uses a square pipe to improve the diversion efficiency and diversion accuracy.

[0022] 3. The pipeline converter and frequency converter of this invention are arranged vertically, which converts the gravity of the fluid into kinetic energy, thereby improving energy efficiency. By adjusting the bending angle of the flow channel extender (such as a 90° arc bend), the flow direction of the fluid is changed, which weakens the influence of gravity on the uniformity of the fluid flow distribution and improves the flow distribution accuracy. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a printed circuit board type heat exchanger flow distribution device according to an embodiment of the present invention;

[0024] Figure 2This is a schematic diagram of the internal splitter plate structure of the pipeline converter and frequency converter according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the longitudinal section of the flow channel extender according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the square flexible tube structure of the frequency converter in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the reciprocating translational mechanism according to an embodiment of the present invention;

[0028] In the diagram: 1. Pipe converter, 2. Variable frequency splitter, 3. Flow channel extender, 11. Circular pipe section of pipe converter, 12. Circular-square pipe transition section of pipe converter, 13. Hexagonal conical pipe transition section of pipe converter, 14. Rectangular pipe section of pipe converter, 15. Diverter plate of pipe converter, 21. Square flexible hose of variable frequency splitter, 22. Square tube of variable frequency splitter, 23. Reciprocating translation mechanism, 24. Housing of variable frequency splitter, 25. Diverter plate of variable frequency splitter, 26. Slide rail, 231. Oscillating voice coil motor, 232. Ball screw, 233. Screw nut, 234. Operating lever, 235. Nut guide rail, 236. Bearing seat. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following embodiments are described in detail with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this invention, but does not constitute a limitation of this invention.

[0030] It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two elements. When two elements are "fixedly connected" or "rotationally connected," the two elements can be directly connected or there may be an intermediate element. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The fixed or fixed connection method can be screwed, welded, riveted, plugged, or connected through a third component. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0032] like Figure 1 As shown in this embodiment, a flow distribution device for a printed circuit board heat exchanger is used to precisely control the fluid flow rate into each layer of microchannels in the body of the printed circuit board heat exchanger, thereby achieving a uniform flow distribution effect (the microchannel distribution area is defined as the heat exchanger body). The flow distribution device includes a pipe converter 1, a frequency converter 2, and a flow channel extender 3 connected in sequence. Fluid flows in from the inlet at the front end of the pipe converter 1, is uniformly distributed by the frequency converter 2, and then changes its flow direction (or does not change its flow direction) by the flow channel extender 3, so that the fluid flow rate into each microchannel of the heat exchanger body is uniform. The pipe converter 1 and the frequency converter 2 are arranged vertically, converting the fluid gravity into kinetic energy. At the same time, the pipe converter 1 also increases the fluid pressure and improves the fluid dynamics by changing the area of ​​the fluid inlet and outlet. This flow distribution device changes the traditional passive flow distribution method and adopts a reciprocating translational mechanism for active flow distribution. The energy loss during the flow distribution process is small, and the flow distribution is reliable, stable, and smooth, which significantly improves the heat exchange effect of fluid in the flow heat exchange process.

[0033] The pipe converter 1 is a hollow pipe, consisting of a front inlet circular pipe section 11, a circular-to-square pipe transition section 12, a hexagonal conical pipe transition section 13, and a rear outlet rectangular pipe section 14, which are fixedly connected in sequence. Several diverter plates 15 are uniformly fixed within the hexagonal conical pipe transition section 13 and the rectangular pipe section 14. Figure 2 As shown, the flow divider 15 makes the lateral flow of fluid flowing into the frequency converter 2 more uniform; the front inlet is set as a round pipe mainly to adapt to the most commonly used round pipes on the market and improve the practicality of the flow divider.

[0034] The flow channel extender 3 has a rectangular cross-section, with uniformly distributed fluid microchannels inside that are equal in diameter to and correspond one-to-one with the microchannels inside the heat exchanger body. Its front end is fixedly connected to the variable frequency distributor housing 24, and its rear end is connected to the printed circuit board type heat exchanger body. When the heat exchanger body is horizontally arranged, the flow channel extender 3 is configured as a 90° arc-shaped bend, with its internal microchannels distributed as follows... Figure 3 As shown; at this time, with the pipe converter 1 and the frequency converter 2 arranged vertically, the front end of the flow channel extender 3 is vertical and the rear end is horizontal, changing the fluid flow direction from vertical to horizontal. The fluid flow direction at the outlet of the flow channel extender is consistent with the fluid flow direction in each layer of the microchannels of the heat exchanger body, which can reduce the influence of gravity on the uniformity of fluid flow distribution and improve the flow distribution accuracy. When the heat exchanger body is arranged vertically or inclined, the arc angle of the flow channel extender 3 can be adjusted to adapt to the fluid flow direction in the microchannels inside the heat exchanger body.

[0035] The frequency converter 2 includes a square flexible tube 21, a square tube 22, a reciprocating translational mechanism 23, and a hollow rectangular shell 24 with a hollow bottom. A rectangular opening is formed on the top surface of the shell 24. The upper side of the rectangular opening is parallel to and fixedly connected to the rectangular outlet of the pipe converter, and the lower side of the rectangular opening is parallel to and fixedly connected to the front end of the square flexible tube 21. The cross-section of the shell 24 is equal to the cross-section of the flow channel extender 3, and this cross-section is larger than the cross-section of the heat exchanger body perpendicular to the fluid flow direction, so as to cover all microchannels within the heat exchanger body. This cross-section can be set as either a rectangle or a chamfered rectangle. The square tube 22 is fixed to the rear end of the square flexible tube 21, and both are housed within the shell 24. Several flow dividers 25, corresponding one-to-one with the flow dividers 15 of the pipe converter, are uniformly fixed inside the square tube 22 of the frequency converter. Figure 2 As shown, this makes the fluid distribution more uniform.

[0036] The cross-sections of the rectangular pipe section 14 of the pipe converter, the square hose 21 of the frequency converter, the square tube 22 of the frequency converter, and the rectangular opening of the outer shell 24 of the frequency converter are all identical. These cross-sections can be one of the following: waist-shaped, rectangular, or chamfered rectangular. The width of the cross-section is 1-2 times the diameter of the microchannel in the heat exchanger body, and the length of the cross-section is the width of the heat exchanger body plane (the width of the fluid layer perpendicular to the flow direction), covering a transverse array of microchannels. The arrangement direction of the rectangular pipe section 14, the square hose 21, and the rectangular opening of the outer shell 24 of the pipe converter is parallel to the transverse distribution direction of the microchannels within the flow channel extender.

[0037] The square tube 22 of the frequency converter is fixed with sliders on both sides, and a slide rail 26 is fixed on the inner side of the outer shell 24. The sliders are nested in the slide rail 26 for guiding the movement of the square tube 22 within the outer shell 24. The square flexible hose 21 is telescopic and bendable to achieve parallel movement of the square tube 22 of the frequency converter in the same plane. Its structure is as follows: Figure 4 As shown; during the reciprocating translation process, the rear end face of the variable frequency distributor square tube 22 is parallel to the front end face of the flow channel extender 3, and the distance between them remains unchanged. This distance is set to a small gap of 0.1-2mm to ensure the accuracy of fluid distribution.

[0038] The reciprocating translation mechanism 23 is fixedly connected to the variable frequency distributor square tube 22, and is used to operate the variable frequency distributor square tube 22 to reciprocate at a uniform speed within the housing 24. The reciprocating translation direction of the variable frequency distributor square tube 22 is parallel to the longitudinal array direction of the microchannels within the flow channel extender 3 (perpendicular to the transverse array direction). Its structure is as follows: Figure 5 As shown, the device includes a oscillating voice coil motor 231 (including a gearbox), a ball screw 232, a screw nut 233, an operating lever 234, and a nut guide rail 235. The ball screw 232 is supported at both ends on bearing seats 236, and its rear end is fixedly connected to the output shaft of the oscillating voice coil motor 231. The nut guide rail is fixed in the same direction as the ball screw 232, and a slider is fixed on the screw nut 233, nested within the nut guide rail 235. The operating lever 234 is fixed to the screw nut 233, passes through a hole in the housing 24 of the frequency converter, and is fixedly connected to the square tube 22 of the frequency converter. The rotation of the oscillating voice coil motor 231 causes the screw nut 233 to reciprocate along the nut guide rail 235, which in turn drives the square tube 22 of the frequency converter at the front end of the operating lever 234 to reciprocate. The reciprocating translational stroke of the operating lever 234, i.e. the stroke of the lead screw nut, is the total thickness of the heat exchanger body (the total thickness of the fluid layer perpendicular to the flow direction); the oscillating voice coil motor 231 rotates forward at a constant speed for N revolutions, causing the operating lever 234 to move forward one stroke, and then rotates backward at a constant speed for N revolutions, causing the operating lever 234 to move backward one stroke. In this way, the variable frequency distributor square tube 22 sweeps through each layer of microchannels at a constant speed, and the amount of fluid flowing into each layer and each microchannel in the flow channel extender 3 and the heat exchanger body is approximately equal.

[0039] The housings, pipes, and connectors (such as the square tube 22 of the frequency converter 1, the variable frequency distributor 2, and the housing 24 of the frequency converter 3) in the pipe converter 1, the variable frequency distributor 2, and the flow channel extender 3 are preferably made of stainless steel, such as 316L stainless steel, to improve their strength and corrosion resistance.

[0040] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. A printed circuit board type heat exchanger diversion device, characterized in that, include: The pipeline converter (1), frequency converter (2), and flow channel extender (3) are connected in sequence; the fluid flows in from the front end of the pipeline converter (1), flows out from the rear end of the flow channel extender (3), and flows into the microchannel of the heat exchanger body; Among them, the pipe converter (1) is a hollow pipe; The pipeline converter (1) and frequency converter (2) are arranged vertically; The frequency converter (2) includes a square hose (21), a square tube (22), a reciprocating translation mechanism (23), and a shell (24) with a hollow bottom surface. The top surface of the shell (24) has a rectangular opening, the upper side of which is fixedly connected to the outlet of the pipe converter (1), and the lower side is fixedly connected to the front end of the square hose (21). The front end of the square tube (22) is fixedly connected to the rear end of the square hose (21). The square hose (21) and the square tube (22) are arranged inside the shell (24). The reciprocating translation mechanism (23) is fixedly connected to the square tube (22) of the frequency converter and is used to operate the square tube (22) of the frequency converter to reciprocate at a uniform speed inside the shell (24). The flow channel extender (3) has fluid microchannels that are uniformly distributed inside and have the same diameter as the microchannels in the heat exchanger body, and correspond one-to-one. Its front end is fixedly connected to the bottom surface of the variable frequency distributor shell (24), and its rear end is fixedly connected to the heat exchanger body. The cross-section of the variable frequency distributor housing (24) is the same as the cross-section of the flow channel extender (3), and the cross-section is larger than the cross-section of the heat exchanger body perpendicular to the fluid flow direction; The rectangular openings of the variable frequency distributor square hose (21), the variable frequency distributor square tube (22), and the variable frequency distributor housing (24) have the same cross-section, and the width of the cross-section is 1-2 times the diameter of the microchannel of the heat exchanger body, and the length of the cross-section is equal to the width of the heat exchanger body. The rectangular openings of the variable frequency distributor square hose (21), the variable frequency distributor square tube (22), and the variable frequency distributor housing (24) are all parallel to the transverse array direction of the microchannels inside the flow channel extender (3) in the length direction of the rectangular openings; the reciprocating translation direction of the variable frequency distributor square tube (22) is parallel to the longitudinal array direction of the microchannels inside the flow channel extender (3), and the reciprocating translation stroke is equal to the thickness of the heat exchanger body; during the reciprocating translation process, the rear end face of the variable frequency distributor square tube (22) is parallel to the front end face of the flow channel extender (3), and the spacing remains unchanged, the spacing being 0.1-2mm; Several flow dividers (25) are uniformly fixed inside the square tube (22) of the frequency converter, and the flow dividers (25) are arranged parallel to the fluid flow direction; Several flow dividers (15) are uniformly fixed inside the pipeline converter (1), and the flow dividers (15) are arranged parallel to the fluid flow direction; the flow dividers (15) of the pipeline converter correspond one-to-one with the flow dividers (25) of the frequency converter.

2. The printed circuit board type heat exchanger diversion device according to claim 1, characterized in that, The pipe converter (1) includes a front inlet circular pipe section (11), a rear outlet rectangular pipe section (14), and a transition section connecting the circular pipe section (11) and the rectangular pipe section (14); the rectangular pipe section (14) of the pipe converter has the same cross-section as the rectangular opening of the variable frequency splitter housing (24), and the length direction of the cross-section is parallel to the transverse array direction of the microchannel inside the flow channel extender (3).

3. The printed circuit board type heat exchanger diversion device according to claim 2, characterized in that, The transition section of the pipeline converter includes a fixedly connected round pipe-square pipe transition section (12) and a six-sided conical pipe transition section (13).

4. The printed circuit board type heat exchanger diversion device according to claim 1, characterized in that, The variable frequency divider square tube (22) has sliders fixed on both sides, and the variable frequency divider housing (24) has a slide rail (26) fixed on the inner side. The sliders are nested in the slide rail (26) for guiding the movement of the variable frequency divider square tube (22) in the variable frequency divider housing (24).

5. A printed circuit board type heat exchanger diversion device according to claim 1, characterized in that, The reciprocating translational mechanism (23) includes a oscillating voice coil motor (231), a ball screw (232), a screw nut (233), an operating lever (234), and a nut guide rail (235). The ball screw (232) is supported at both ends on bearing seats (236), and its rear end is fixedly connected to the output shaft of the oscillating voice coil motor (231). The nut guide rail (235) is fixed in the same direction as the ball screw (232), and a screw nut (233) is fixed with… The slider is nested inside the nut guide rail (235); the rear end of the operating lever (234) is fixed on the lead screw nut (233), and its front end passes through the hole on the variable frequency divider housing (24) and is fixedly connected to the variable frequency divider square tube (22); the oscillating voice coil motor (231) rotates, causing the lead screw nut (233) to move back and forth along the nut guide rail (235), which drives the variable frequency divider square tube (22) at the front end of the operating lever (234) to move back and forth.

6. A printed circuit board type heat exchanger diversion device according to claim 1, characterized in that, The cross-section of the rectangular opening of the variable frequency divider square hose (21), variable frequency divider square tube (22), and variable frequency divider housing (24) is one of waist-shaped, rectangular, or chamfered rectangular.

7. A printed circuit board type heat exchanger diversion device according to claim 1, characterized in that, The flow channel extender (3) is a circular arc bend structure.

8. A printed circuit board type heat exchanger diversion device according to claim 1, characterized in that, The pipe converter (1), flow channel extender (3), frequency converter square tube (22), and frequency converter housing (24) are made of stainless steel.

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