CN221975884U - Rotary heat exchanger and heat exchange system - Google Patents

Abstract

The application relates to a rotary heat exchanger and a heat exchange system. The rotary heat exchanger comprises a heat exchange tube and a central rotating shaft, wherein a cavity is formed in the central rotating shaft, the heat exchange tube is communicated with the internal cavity of the central rotating shaft, heat exchange medium can flow into the heat exchange tube from the internal cavity of the central rotating shaft, and the heat exchange tube can rotate around the central rotating shaft. The application has the technical effects of low noise, low running power consumption and capability of realizing full heat exchange.

Description

Rotary heat exchanger and heat exchange system

Technical Field

The application relates to a rotary heat exchanger and a heat exchange system, which are suitable for the technical field of heat exchange equipment.

Background

The forced convection heat exchanger is a heat exchanger that performs heat exchange by forced convection, and it is necessary to generate a flow of an energy substance by means of a pump or a fan, etc., thereby generating a liquid flow or a gas flow, and heat exchange with the heat exchanger occurs. The heat exchange efficiency of forced convection mainly depends on the heat exchange efficiency of the heat exchange medium in the pipe and the energy source substance outside the pipe, and if the heat exchange coefficient of any one is too small, the heat exchange coefficient of the whole system is directly related to the smaller heat exchange coefficient. Therefore, strengthening the heat exchange efficiency inside and outside the tube is always an important means for promoting the improvement of the overall heat exchange efficiency of the heat exchanger.

A small-channel pipeline heat exchanger with a flow equivalent diameter smaller than 4mm or a micro-channel pipeline heat exchanger with a flow equivalent diameter smaller than 1mm is a main research direction for strengthening heat exchange in a pipe in recent years. Because the equivalent diameter of circulation is reduced, the micro-channel effect of the heat exchange medium in the tube can occur during heat exchange, thereby greatly improving the heat exchange coefficient in the tube. While the heat exchange efficiency in the pipe is improved, the problem is that the improvement of the heat exchange coefficient outside the pipe lacks an effective means. Because the effective means for enhancing heat exchange outside the tube at present generally only increases the flow rate of the energy material outside the tube, that is, the flow rate of the energy material passing through the heat exchanger needs to be increased, additional problems such as noise and electric power consumption can be brought to the pump or the fan at the moment, and particularly, the noise generated by the fan while generating a large flow of air flow can not be born.

Therefore, there is an urgent need in the art for a heat exchanger and a heat exchange system that have low noise, low operating power consumption, and can achieve sufficient heat exchange and have a forced convection heat exchange effect.

Disclosure of utility model

The application provides a rotary heat exchanger and a heat exchange system, which have the technical effects of low noise, low operation power consumption and capability of realizing full heat exchange.

The application relates to a rotary heat exchanger, which comprises a heat exchange tube and a central rotating shaft, wherein a cavity is arranged in the central rotating shaft, the heat exchange tube is communicated with the internal cavity of the central rotating shaft, a heat exchange medium can flow into the heat exchange tube from the internal cavity of the central rotating shaft, and the heat exchange tube can rotate around the central rotating shaft.

The heat exchange tube comprises a central rotating shaft, wherein the central rotating shaft comprises a collecting inlet tube and a collecting outlet tube, a partition piece can be arranged in the central rotating shaft to separate the inner cavities of the central rotating shaft from each other to form the collecting inlet tube and the collecting outlet tube respectively, and at least two channels of the heat exchange tube can be mutually independent or form a whole through a connecting piece; at least two heat exchange tubes can be arranged in parallel and integrated by a connecting piece, a middle collecting pipe is arranged at the far end far away from the central rotating shaft, one end of each heat exchange tube is connected to the middle collecting pipe, and the other end is connected to the collecting inlet pipe or the collecting outlet pipe; the heat exchange tube, the middle header and the connecting piece can form a fan-blade-shaped heat exchange surface; the central rotating shaft can be provided with a sealing component at the openings of the heat exchange medium inflow and outflow of the collecting pipe and the collecting pipe; the sealing assembly can comprise a first sealing element and a second sealing element, wherein a port for flowing in a heat exchange medium is formed in the first sealing element, a port for flowing out the heat exchange medium is formed in the second sealing element, an opening which is respectively communicated with the first sealing element and the second sealing element is formed in the central rotating shaft, a rotary seal is formed between the first sealing element and the opening of the collecting pipe, and a rotary seal is formed between the second sealing element and the opening of the collecting pipe; a sealing component can be arranged at one end of the heat exchange tube far away from the central rotating shaft, and a rotary seal is formed between the sealing component and the heat exchange tube; a current collecting channel can be arranged in the sealing assembly, an outflow port is further arranged on the sealing assembly, and the current collecting channel is communicated with the outflow port; the heat exchange tube can be provided with a channel bayonet, and the equivalent diameter of the channel bayonet is smaller than that of the heat exchange tube; dividing walls may be provided at the channel bayonets along an axial direction of the rotary heat exchanger, the inside and outside of the dividing walls being respectively formed with flow passages.

The application also relates to a heat exchange system, which comprises a heat exchanger, a pump and a valve which are sequentially connected in series, wherein the heat exchanger is a rotary heat exchanger as described above, and the heat exchanger is respectively connected with the pump and the valve through pipelines of heat exchange media.

The application also relates to a heat exchange system, which comprises a first heat exchanger, a compressor, a second heat exchanger and a valve which are sequentially connected in series, wherein at least one of the first heat exchanger and the second heat exchanger is a rotary heat exchanger as described above, and the rotary heat exchanger is respectively connected with the compressor and the valve through pipelines of heat exchange media. Wherein the compressor may be connected to the line for the heat exchange medium via a reversing valve.

The application can directly drive the rotary heat exchanger to rotate through the motor, and realize the heat exchange with the forced convection effect of the energy substances directly by utilizing the high rotating speed of the rotary heat exchanger, thereby reducing the secondary links and loss of the motor driving the fan to generate air flow and then quicken the heat exchange, and reducing the noise of the system. The rotary heat exchanger does not need to be provided with a fan, saves the space size of the whole heat exchange circulating system, and reduces the manufacturing, installation and transportation costs. The rotary heat exchanger can change the physical state of the heat exchange medium by utilizing centrifugal force, thereby fundamentally changing the whole heat exchange circulation system.

Drawings

Fig. 1 is a schematic view of a rotary heat exchanger of the present application.

Fig. 2 is a schematic view of a rotary heat exchanger provided with fins.

Fig. 3 is a schematic view of another rotary heat exchanger provided with fins.

Fig. 4a is a schematic cross-sectional view of another rotary heat exchanger.

Fig. 4b is a schematic side view of another rotary heat exchanger.

Fig. 4c is a perspective view of another rotary heat exchanger.

Fig. 5 is a schematic view of a fan-like rotary heat exchanger.

Fig. 6 is a schematic view of a rotary heat exchanger provided with a plurality of fan blades.

Fig. 7a is a schematic diagram of a heat exchange system of the present application.

Fig. 7b is a schematic view of another heat exchange system of the present application.

Fig. 7c is a schematic view of yet another heat exchange system of the present application.

Fig. 8 is a schematic view of a shaft seal structure of the rotary heat exchanger of the present application.

Fig. 9 is a schematic view of an end seal structure of the rotary heat exchanger of the application.

Fig. 10 is a schematic view of the rotary heat exchanger of fig. 9 from another perspective.

Fig. 11a is a schematic view of a heat exchange system including the rotary heat exchanger of fig. 9.

Fig. 11b is a schematic view of another heat exchange system including the rotary heat exchanger of fig. 9.

Fig. 12 is another modified embodiment of the rotary heat exchanger shown in fig. 10.

Fig. 13 is a schematic view of a heat exchange system including the rotary heat exchanger of fig. 12.

Fig. 14 is a modified embodiment of the rotary heat exchanger shown in fig. 12.

Fig. 15 is a schematic view of a heat exchange system including the rotary heat exchanger of fig. 14.

Fig. 16 is a schematic view of another construction of the rotary heat exchanger of the application.

Fig. 17 is a schematic view showing a specific structure of the heat exchange tube of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.

The rotary heat exchanger comprises a heat exchange tube 11, a collecting inlet tube 12 and a collecting outlet tube 13, wherein two ends of the heat exchange tube 11 are respectively communicated with the collecting inlet tube 12 and the collecting outlet tube 13, at least one of the collecting inlet tube 12 and the collecting outlet tube 13 is arranged at a central rotating shaft of the heat exchanger, and the heat exchange tube 11 can rotate around the central rotating shaft of the heat exchanger. As shown in fig. 1, the collecting pipe 12 and the collecting pipe 13 may be both disposed inside a central rotating shaft, in which a partition is provided to separate the inner cavities thereof from each other, and the heat exchange pipe 11 protrudes from the central rotating shaft and is rotatable about the central rotating shaft. In the cross-sectional view shown in fig. 1, the number of heat exchange tubes 11 may be at least one. Multiple rows of heat exchange tubes can be arranged along the length direction of the central rotating shaft. The heat exchange medium flows from the collecting pipe 12 into the heat exchange pipe 11, flows through the heat exchange pipe 11, exchanges heat with the energy material by forced convection effect through the rotating heat exchange pipe 11, and finally flows back to the collecting pipe 13. The two channels of the heat exchange tubes 11 can be independent of each other, and the two heat exchange tubes 11 can be connected to form a whole through the connecting piece so as to improve the integrity, thereby being convenient for storage and increasing the heat exchange area. The connecting piece can be made of a material with excellent heat conduction performance, and a uniform temperature field is easy to form in the area of the connecting piece.

According to the application, heat exchange is directly realized with energy materials through rotation of the heat exchanger, and according to the linear speed of the heat exchanger which is the product of the rotating speed and the radius of the heat exchanger, the larger linear speed is obtained through the lower rotating speed, and the larger heat exchange efficiency is obtained outside the tube. For example, assuming that the radius of rotation of the heat exchanger is 0.25 m, if the heat exchanger is rotated at a rotational speed of 3000 rpm, the linear velocity of the outermost side of the heat exchanger can reach 12.5 m/s, which is far greater than the flow velocity of the air flow generated by the conventional fan at the heat exchange surface, thereby bringing about the effect of forced convection.

Preferably, as shown in fig. 2, fins 15 may be further added to the heat exchange tube 11 to increase the heat exchange area. The fins 15 may be disposed at equal intervals or at unequal intervals in the axial direction of the heat exchange tube 11. The fins 15 may have equal lengths or different lengths. The different linear speeds of the fins 15 due to different distances from the central rotating shaft of the heat exchanger further affect the difference of heat exchange efficiency. Therefore, the fins 15 can be arranged in an irregular shape as shown in fig. 3, so that the forced convection effect generated when the heat exchanger rotates is more uniform, and the distance between the center of mass of the structure formed by the heat exchange tube 11 and the fins 15 and the central rotating shaft of the heat exchanger can be reduced, and the torque when the heat exchanger rotates is reduced.

In order to keep balance when the heat exchanger rotates and prevent the motor from running and generating faults to the motor during running, the heat exchange tubes 11 on the heat exchanger can be symmetrically arranged on two sides by taking the central rotating shaft of the heat exchanger as a reference. Meanwhile, in order to obtain a larger heat exchange area, a plurality of heat exchange tubes 11 can be arranged on the collecting inlet tube 12 and the collecting outlet tube 13, and the plurality of heat exchange tubes 11 are symmetrically arranged by taking the central rotating shaft of the heat exchanger as a reference, as shown in fig. 4a-4 c.

In order to reduce the larger power consumption caused by larger torque generated by the mass of the heat exchanger when the heat exchanger rotates, the heat exchange tube 11, the connecting piece 14 and the fins 15 are preferably made of lighter materials, for example, the equivalent diameter of the heat exchange tube 11 can be selected to be below 4mm, and even micro-channels below 1mm can be used as pipelines; materials with the thickness of less than 1mm can be selected as the materials of the connecting piece 14 and the fin 15, and only the requirements of strength and rigidity required by the rotation of the heat exchanger are met.

As shown in fig. 5, in order to further reduce the flow resistance of the heat exchange medium, a plurality of heat exchange tubes 11 may be arranged in parallel, and the heat exchange tubes are fixed into a whole by using a connecting piece 14, and the other ends of the plurality of heat exchange tubes 11 are connected with a middle header 16, so as to further reduce the flow path length. The heat exchange medium flows from the header 12, along the heat exchange tube 11, into the middle header 16 to change the flow direction, into the heat exchange tube 11, and finally out of the header 13. As shown in fig. 6, in order to make the heat exchanger and the energy material form better surface heat exchange, the heat exchange surface formed by the plurality of heat exchange tubes 11 and the connecting piece 14 may be made into a spiral curved surface in the shape of a fan blade according to the basic principles of fluid flow and disturbance. The collecting and feeding pipes 12 and the collecting and feeding pipes 13 are respectively arranged at the middle positions of the spiral curved surfaces, so that the heat exchange pipes on each spiral curved surface are communicated with the collecting and feeding pipes 12 and the collecting and feeding pipes 13. The rotary heat exchanger shown in fig. 6 can not only utilize the existing fan blade design scheme fully taking the fluid dynamics principle into consideration, but also fully exert the forced convection effect generated by the rotary heat exchanger of the application, and has unique technical advantages.

As shown in fig. 7a-7c, the rotary heat exchanger of the present application may be connected to other heat exchange components to form a circulating heat exchange system. As shown in fig. 7a, the heat exchange system may mainly consist of a rotary heat exchanger 1, a pump 2, a valve 4 and a storage tank 6. As shown in fig. 7b, the phase change heat exchange system may also be constituted mainly by the rotary heat exchanger 1, the compressor 2', the conventional heat exchanger 3 and the valve 4. In the phase-change-free heat exchange system, a collecting pipe and a collecting pipe of the rotary heat exchanger 1 are respectively connected with the pump 2 and the valve 4 through pipelines of heat exchange media, and the storage tank 6 is used for storing the heat exchange media. In the phase change heat exchange system, a collecting pipe and a collecting pipe of the rotary heat exchanger 1 are respectively connected with a compressor 2 'and a valve 4 through pipelines of heat exchange media, and the compressor 2' can be also connected with a reversing valve 5. As shown in fig. 7c, two rotary heat exchangers can be respectively used as heat exchangers for evaporation and condensation to form a phase change heat exchange system, and a reversing valve 5 is additionally arranged to realize the switching of the rotary heat exchangers for evaporation or condensation.

As shown in fig. 8, the collecting inlet pipe 12 and the collecting outlet pipe 13 are both arranged at the central rotating shaft, and a sealing component 7 can be additionally arranged at the openings of the heat exchange medium flowing in and out of the collecting inlet pipe 12 and the collecting outlet pipe 13. The seal assembly 7 includes a first seal 71 and a second seal 72, the first seal 71 and the second seal 72 respectively communicating with and forming a rotary seal with the inlet header 12 and the outlet header 13, respectively. As shown, the first seal 71 and the second seal 72 are provided with ports 74 and 73, respectively, for the flow of heat exchange medium in and out. The rotating shafts are respectively provided with openings communicated with the first sealing piece 71 and the second sealing piece 72, the first sealing piece 71 forms a rotary seal with the opening of the collecting pipe 12, and the second sealing piece 72 forms a rotary seal with the opening of the collecting pipe 13. The heat exchange medium can flow in from the port 74 of the first sealing member 71, then flows into the collecting pipe 12 through the opening on the collecting pipe, further flows into the heat exchange pipe 11 of the rotary heat exchanger, flows out of the heat exchange pipe 11 and then flows back into the collecting pipe 13, then flows into the second sealing member 72 through the opening on the collecting pipe, and finally flows out through the port 73.

As shown in fig. 9-10, on the basis of the above-mentioned rotary heat exchanger, the collecting pipe is used as a flowing channel of heat exchange medium, and the other end of the heat exchange pipe 11 is provided with a sealing component 7, and a rotating bearing can be arranged between the sealing component and the heat exchange pipe to form good rotating end face seal, so that the heat exchange medium in the heat exchange pipe is prevented from leaking. Meanwhile, the heat exchange medium in the heat exchange tube is further collected into a current collecting channel 75 formed by the sealing component, the current collecting channel 75 is communicated with the port 73, and the circulating flow of the heat exchange medium can be realized after the port 73 is externally connected with a pipeline. With this structure, the heat exchanger can be rotated by the motor 8, and the sealing assembly 7 does not rotate but can realize good sealing with the heat exchanger, so as to prevent the heat exchange medium in the heat exchanger from leaking.

Similar to fig. 7a-7c, the rotary heat exchanger shown in fig. 9 can be connected to other heat exchange components to form a circulating heat exchange system. As shown in fig. 11a, the heat exchange system may mainly consist of a rotary heat exchanger 1, a compressor 2', a conventional heat exchanger 3 and a valve 4. In the phase change heat exchange system, a collecting inlet pipe and a collecting outlet pipe of the rotary heat exchanger 1 are respectively connected with a compressor 2', a conventional heat exchanger 3 and a valve 4 through pipelines of heat exchange media, and the compressor 2' can be also connected with a reversing valve 5 to realize the switching of the rotary heat exchanger for evaporation or condensation. Further, as shown in fig. 11b, the phase change heat exchange system may be constituted by two rotary heat exchangers as heat exchangers for evaporation and condensation, respectively.

As shown in fig. 12, a narrow channel bayonet 17 may be disposed in the middle of the heat exchange tube 11, so that the heat exchange medium forms a pressure difference therein, so as to further change the physical working condition of the heat exchange medium, for example, the heat exchange medium may generate a temperature change, which will positively affect the heat exchange effect. The pressure difference is mainly formed by that the rotating heat exchanger generates centrifugal force in the rotating process, the linear velocity of the heat exchange medium close to the central rotating shaft of the heat exchanger is small, the centrifugal force is small, thus the pressure generated on the channel section of the heat exchange tube is small, the linear velocity of the heat exchange medium far away from the central rotating shaft of the heat exchanger is large, the centrifugal force is large, thus the pressure is generated on the channel section of the heat exchange tube, and the pressure difference is generated by the heat exchange medium. Preferably, the ratio of the equivalent diameter of the channel bayonet 17 to the equivalent diameter of the heat exchange tube 11 may be less than 0.1, preferably may be 0.02-0.1. As shown in fig. 13, the rotary heat exchanger 1 is driven to rotate by the motor 8, so that a pressure difference is generated between the port 73 of the sealing assembly and the collecting pipe at the central rotating shaft, and the heat exchange medium can be circulated in the heat exchanger without compressor driving but only with motor driving.

As shown in fig. 14, a partition wall 9 may also be provided at the distal end of the channel bayonet 17 in the axial direction of the rotary heat exchanger to physically isolate the heat exchange fluid inside and outside the channel bayonet 17, i.e. to effect condensation inside the channel bayonet 17 and evaporation outside the channel bayonet 17, and vice versa. As shown in fig. 15, there are shown different flow paths isolated from each other by heat exchange fluid formed inside and outside the partition wall 9, respectively.

As shown in fig. 16, the heat exchanger center rotating shaft where the collecting pipe 12 and the collecting pipe 13 are located is also connected with a supporting plate 10 for reducing hysteresis loss and eddy current loss, and the material of the supporting plate is silicon steel sheet. The heat exchange tube 11 may be wound around the support plate 10 to form a rotor coil. The stator coil may be formed by winding the support plate 10 around the outer ring of the rotor with the heat exchange tube 11. The heat exchange tubes 11 wound on the stator and the rotor are communicated with the inner cavity of the central rotating shaft, so that heat exchange medium can circularly flow. The specific circulation mode of each heat exchange tube and the collecting inlet tube or the collecting outlet tube can be designed according to the flow path of the heat exchange medium. When the heat exchange tube 11 on the rotor coil and the stator coil is electrified, a shearing magnetic field is formed like a motor, so that the rotor coil rotates, and air flow in a channel formed by the stator coil is disturbed to exchange heat with the heat exchange tube 11 on the rotor coil and the stator coil. Thus, the rotary heat exchanger 1 can automatically rotate to exchange heat under the condition that the heat exchange tube 11 is electrified.

As shown in fig. 17, in order to avoid the possibility of electrification of the entire system after the heat exchange tube 11 is electrified, an insulating coating may be applied to the heat exchange tube 11 and a shunt may be formed at the end of the heat exchange tube 11. Wherein, one path of the heat exchange tube body 111 is welded with an insulating material pipeline 112, and the insulating material pipeline 112 is further welded with a metal pipeline 113 connected with the collecting pipe 12 and the collecting pipe 13 to form a heat exchange medium passage; the other path of the heat exchange tube body 111 is further connected to a solid wire 114 to form an electrical path.

Although the embodiments of the present application are described above, the embodiments are only used for facilitating understanding of the present application, and are not intended to limit the present application. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.

Claims (15)

1. The utility model provides a rotatory heat exchanger, its characterized in that includes heat exchange tube and center pivot, the inside of center pivot is equipped with the cavity, the heat exchange tube with the inside cavity intercommunication of center pivot, heat exchange medium can follow the inside cavity inflow of center pivot in the heat exchange tube, the heat exchange tube can round the center pivot is rotatory.

2. The rotary heat exchanger according to claim 1, comprising a collecting pipe and a collecting pipe, wherein a partition is provided in the central shaft to separate the inner cavities thereof from each other, forming the collecting pipe and the collecting pipe, respectively.

3. The rotary heat exchanger according to claim 2, wherein at least two channels of the heat exchange tube are independent of each other or are formed integrally by a connection member.

4. The rotary heat exchanger according to claim 2, wherein at least two of the heat exchange tubes are arranged in parallel and integrally formed with a connector, a middle header is provided at a distal end remote from the central rotation axis, one end of the heat exchange tube is connected to the middle header, and the other end is connected to the collecting inlet tube or the collecting outlet tube.

5. The rotary heat exchanger of claim 4 wherein the heat exchange tubes, the middle header and the connector form a fan-like heat exchange surface.

6. The rotary heat exchanger according to claim 2, wherein the central rotating shaft is provided with a sealing assembly at openings of the heat exchange medium flowing in and out of the collecting inlet pipe and the collecting outlet pipe.

7. The rotary heat exchanger according to claim 6, wherein the seal assembly comprises a first seal member and a second seal member, wherein the first seal member is provided with a port through which the heat exchange medium flows, the second seal member is provided with a port through which the heat exchange medium flows, the central rotating shaft is provided with an opening which is respectively communicated with the first seal member and the second seal member, the first seal member and the opening of the collecting pipe form a rotary seal, and the second seal member and the opening of the collecting pipe form a rotary seal.

8. The rotary heat exchanger according to claim 1, wherein a seal assembly is provided at an end of the heat exchange tube remote from the central axis of rotation, the seal assembly forming a rotary seal with the heat exchange tube.

9. The rotary heat exchanger according to claim 8, wherein a collecting channel is provided in the interior of the seal assembly, and an outflow port is further provided on the seal assembly, the collecting channel communicating with the outflow port.

10. The rotary heat exchanger according to claim 8 or 9, wherein the heat exchange tube is provided with a channel bayonet, and the equivalent diameter of the channel bayonet is smaller than that of the heat exchange tube.

11. The rotary heat exchanger according to claim 10, wherein a partition wall is provided at the channel bayonet in the axial direction of the rotary heat exchanger, the partition wall being formed with flow passages at the inside and outside thereof, respectively.

12. A heat exchange system comprising a heat exchanger, a pump and a valve connected in series in sequence, characterized in that the heat exchanger is a rotary heat exchanger according to any one of claims 1-11, which heat exchanger is connected to the pump and the valve, respectively, by means of a conduit for a heat exchange medium.

13. A heat exchange system comprising a first heat exchanger, a compressor, a second heat exchanger and a valve connected in series in sequence, characterized in that at least one of the first heat exchanger and the second heat exchanger is a rotary heat exchanger according to any one of claims 1-11, which is connected to the compressor and the valve, respectively, by a line of a heat exchange medium.

14. The heat exchange system of claim 13, wherein the compressor is connected to the line of heat exchange medium by a reversing valve.

15. The utility model provides a rotatory heat exchanger, its characterized in that includes heat exchange tube and center pivot, the inside of center pivot is equipped with the cavity, the heat exchange tube with the inside cavity intercommunication of center pivot, still be connected with the backup pad in the center pivot and form the rotor, the winding has the heat exchange tube in the backup pad the outer lane of rotor still is equipped with the backup pad and regard as the stator, also twine the heat exchange tube on the stator.