Phase change heat exchanger

Abstract

The utility model belongs to the technical field of heat exchangers, and discloses a phase change heat exchanger which comprises an inner copper pipe and an outer pipe which is coaxially distributed with the inner copper pipe and located on the outer ring of the inner copper pipe. A pipe cavity of the inner copper pipe serves as a first flowing cavity of a refrigerant, the inner wall of the inner copper pipe is provided with chamber grains used for improving the turbulent flow capacity, and the chamber grains prevent the refrigerant from forming an oil film on the inner wall of the inner copper pipe; and a second flowing cavity for flowing of to-be-cooled fluid is formed between the outer ring of the inner copper pipe and the inner ring of the outer pipe. In order to prevent an oil film for hindering heat transfer from being formed on the surface of the inner copper pipe when a refrigerant flows through the inner copper pipe, the inner wall of the inner copper pipe is provided with the chamber grains for improving the turbulent flow capacity, and the chamber grains can hinder the formation of the oil film or reduce the thickness of the oil film to a certain extent, so that the problem is solved; by adjusting the depth, the width, the angle and the distance of the chamber grains, the proper turbulent flow capacity can be obtained, and meanwhile the influence on the flowability and the distribution of the refrigerant is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and in particular relates to a phase change heat exchanger. Background Art

[0002] In a refrigeration system, the main function of a heat exchanger is to achieve heat exchange between the refrigerant and the object being cooled. As the main component of a heat exchanger, copper tubes have better thermal conductivity and corrosion resistance than other materials. However, when the refrigerant flows through the copper tube, an oil film will form on the surface of the copper tube, which will hinder the transfer of heat and reduce the heat exchange efficiency. Utility Model Content

[0003] In view of the problems raised by the above background technology, the purpose of the present utility model is to provide a phase change heat exchanger.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0005] A phase change heat exchanger comprises an inner copper tube, and an outer tube coaxially distributed with the inner copper tube and located on the outer circle of the inner copper tube;

[0006] The tube cavity of the inner copper tube serves as the first flow cavity of the refrigerant, and the inner wall of the inner copper tube is provided with a bore pattern for improving the flow disturbance capability, and the bore pattern prevents the refrigerant from forming an oil film on the inner wall of the inner copper tube;

[0007] A second flow cavity for the fluid to be cooled to flow is formed between the outer ring of the inner copper tube and the inner ring of the outer tube;

[0008] The inner copper tube serves as a medium for heat conduction between the fluid to be cooled and the refrigerant.

[0009] It is further defined that the outer tube includes a first sub-lobe and a second sub-lobe, and the first sub-lobe and the second sub-lobe are combined to form the outer tube. The inner walls of the first sub-lobe and the second sub-lobe are provided with a semicircular baffle, and the inner ring size of the baffle is adapted to the diameter of the inner copper tube. Such a structural design, in which the first sub-lobe and the second sub-lobe are used to form the outer tube, allows the outer tube to be separated and combined, which is conducive to later cleaning and maintenance. If the outer tube is processed as a whole, it is difficult to process the inside of the outer tube. The baffle is used to standardize the flow path of the fluid to be cooled, prolong the residence time of the fluid to be cooled, and prolong the heat exchange time with the refrigerant, thereby improving the heat exchange effect. In addition, the baffle can also play a role in assisting in fixing the inner copper tube.

[0010] It is further defined that the baffles in the outer tube are alternately distributed along the axial direction. Such a structural design and alternating distribution allow the fluid to move forward only in a circuitous and alternating manner.

[0011] It is further defined that the baffle is provided with a plurality of through holes. With such a structural design, the through holes are used to neutralize the obstruction effect of the baffle on the cooling fluid, thereby avoiding excessive obstruction of the fluid flow and resulting in a lower passing effect.

[0012] It is further defined that two limiting rings are provided on the circumference of the inner copper tube, and the inner spacing between the two limiting rings is equal to the length of the outer tube. With such a structural design, the limiting rings are used to regulate the specific position of the outer tube in the axial direction of the inner copper tube.

[0013] It is further defined that the first temperature sensor is connected to one side of the input end of the inner copper tube, and the second temperature sensor is connected to one side of the output end of the inner copper tube. With such a structural design, the temperature difference between the first temperature sensor and the second temperature sensor represents the temperature change before and after the heat exchange of the refrigerant, thereby indicating the efficiency of the heat exchange.

[0014] It is further defined that the outer tube is provided with a fluid inlet and a fluid outlet, the fluid inlet is connected to an input pipeline, the input pipeline is connected to a third temperature sensor, the fluid outlet is connected to an output pipeline, and the output pipeline is connected to a fourth temperature sensor. With such a structural design, the temperature difference between the third temperature sensor and the fourth temperature sensor represents the temperature change before and after the heat exchange of the fluid to be cooled, thereby indicating the efficiency of the heat exchange.

[0015] It is further defined that a sealing ring is installed at the sealing point between the inner copper tube and the outer tube, and the inner ring and the outer ring of the sealing ring are both provided with a plurality of barrier rings. With such a structural design, the sealing ring is used to prevent leakage, and the plurality of barrier rings improve the sealing effect.

[0016] The beneficial effects of the utility model are as follows: in order to prevent the formation of an oil film on the surface of the inner copper tube which hinders heat transfer when the refrigerant flows through the inner copper tube, the inner wall of the inner copper tube is provided with a bore groove for improving the flow disturbance capability. The presence of the bore groove can hinder the formation of the oil film or reduce the thickness of the oil film to a certain extent, thereby solving the above-mentioned problem. In addition, by adjusting the depth, width, angle and spacing of the bore groove, it is possible to obtain appropriate flow disturbance capability while avoiding the formation of excessive resistance, which would affect the fluidity and distribution of the refrigerant. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the phase change heat exchanger of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the inner copper tube in the embodiment of the phase change heat exchanger of the utility model;

[0020] Figure 3It is a schematic diagram of the structure of the first sub-petal and the second sub-petal of the phase change heat exchanger embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the sealing ring in the embodiment of the phase change heat exchanger of the utility model;

[0022] The main component symbols are described as follows:

[0023] 1. Inner copper tube; 11. Limit ring; 12. Chamber pattern;

[0024] 2. outer tube; 21. first sub-petal; 211. baffle; 212. through hole; 22. second sub-petal;

[0025] 3. Sealing ring; 31. Barrier ring;

[0026] 4. A first temperature sensor;

[0027] 5. Second temperature sensor;

[0028] 6. Output pipeline;

[0029] 7. Input pipeline;

[0030] 8. Fourth temperature sensor;

[0031] 9. The third temperature sensor. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] like Figure 1-4 As shown, the phase change heat exchanger of the utility model comprises an inner copper tube 1, and an outer tube 2 coaxially distributed with the inner copper tube 1 and located at the outer circle of the inner copper tube 1;

[0034] The tube cavity of the inner copper tube 1 serves as the first flow cavity of the refrigerant. The inner wall of the inner copper tube 1 is provided with a bore groove 12 for improving the flow disturbance capability. The bore groove 12 prevents the refrigerant from forming an oil film on the inner wall of the inner copper tube 1.

[0035] A second flow cavity for the fluid to be cooled to flow is formed between the outer ring of the inner copper tube 1 and the inner ring of the outer tube 2;

[0036] The inner copper tube 1 serves as a medium for heat conduction between the fluid to be cooled and the refrigerant.

[0037] In this embodiment:

[0038] The fluid to be cooled flows in the space between the outer ring of the inner copper tube 1 and the inner ring of the outer tube 2, and the refrigerant flows in the tube cavity of the inner copper tube 1. The inner copper tube 1 is used as a medium for heat conduction between the fluid to be cooled and the refrigerant, so as to realize the transfer of heat from the high-temperature object to the low-temperature object, that is, the transfer from the fluid to be cooled to the refrigerant, so as to achieve the purpose of cooling the fluid to be cooled;

[0039] In order to prevent the formation of an oil film that hinders heat transfer on the surface of the inner copper tube 1 when the refrigerant flows through the inner copper tube 1, the inner wall of the inner copper tube 1 is provided with a bore groove 12 for improving the flow disturbance capability. The existence of the bore groove 12 can hinder the formation of the oil film or reduce the thickness of the oil film to a certain extent, thereby solving the above-mentioned problem. In addition, by adjusting the depth, width, angle and spacing of the bore groove 12, it is possible to obtain appropriate flow disturbance capability while avoiding the formation of excessive resistance that affects the fluidity and distribution of the refrigerant.

[0040] Preferably, the outer tube 2 includes a first sub-petal 21 and a second sub-petal 22, which are combined to form the outer tube 2. The inner walls of the first sub-petal 21 and the second sub-petal 22 are both provided with a semicircular annular baffle 211, and the inner ring size of the baffle 211 is adapted to the diameter of the inner copper tube 1. With such a structural design, the outer tube 2 is composed of two components, the first sub-petal 21 and the second sub-petal 22, so that the outer tube 2 can be separated and combined, which is conducive to later cleaning and maintenance. If the outer tube 2 is processed as a whole, it is difficult to process the inside of the outer tube 2. The baffle 211 is used to standardize the flow path of the fluid to be cooled, prolong the residence time of the fluid to be cooled, prolong the heat exchange time with the refrigerant, and thus improve the effect of heat exchange. In addition, the baffle 211 can also play a role in assisting the fixing of the inner copper tube 1. In fact, other structural shapes of the outer tube 2 can also be considered according to specific circumstances.

[0041] Preferably, the baffles 211 in the outer tube 2 are alternately distributed along the axial direction. Such a structural design and alternating distribution can only allow the fluid to advance in a circuitous and alternating manner. In fact, other distribution forms of the baffles 211 can also be considered according to specific circumstances.

[0042] Preferably, the baffle 211 is provided with a plurality of through holes 212. With such a structural design, the through holes 212 are used to neutralize the obstruction of the baffle 211 on the cooling fluid, thereby avoiding excessive obstruction of the fluid flow and resulting in a low flow effect. In fact, other structural shapes that can avoid too slow a flow rate can also be considered according to specific circumstances.

[0043] Preferably, two limiting rings 11 are provided on the circumference of the inner copper tube 1, and the inner spacing of the two limiting rings 11 is equal to the length of the outer tube 2. With such a structural design, the limiting rings 11 are used to regulate the specific position of the outer tube 2 in the axial direction of the inner copper tube 1. In fact, other structural shapes for determining the position of the outer tube 2 can also be considered according to specific circumstances.

[0044] Preferably, the input end of the inner copper tube 1 is connected to the first temperature sensor 4, and the output end of the inner copper tube 1 is connected to the second temperature sensor 5. With this structural design, the temperature difference between the first temperature sensor 4 and the second temperature sensor 5 represents the temperature change before and after the refrigerant heat exchange, and further indicates the efficiency of the heat exchange. In fact, other structural shapes for detecting the heat exchange efficiency can also be considered according to specific circumstances.

[0045] Preferably, the outer tube 2 is provided with a fluid inlet and a fluid outlet, the fluid inlet is connected to the input pipeline 7, the input pipeline 7 is connected to the third temperature sensor 9, the fluid outlet is connected to the output pipeline 6, and the output pipeline 6 is connected to the fourth temperature sensor 8. With such a structural design, the temperature difference between the third temperature sensor 9 and the fourth temperature sensor 8 represents the temperature change before and after the heat exchange of the fluid to be cooled, and further indicates the efficiency of the heat exchange. In fact, other structural shapes for detecting the heat exchange efficiency can also be considered according to specific circumstances.

[0046] Preferably, a sealing ring 3 is installed at the sealing point between the inner copper tube 1 and the outer tube 2, and the inner and outer rings of the sealing ring 3 are both provided with a plurality of barrier rings 31. With such a structural design, the sealing ring 3 is used to prevent leakage, and the plurality of barrier rings 31 improve the sealing effect. In fact, other sealing structures can also be considered according to specific circumstances.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A phase change heat exchanger, characterized in that: It comprises an inner copper tube (1), and an outer tube (2) coaxially distributed with the inner copper tube (1) and located on the outer circle of the inner copper tube (1); The tube cavity of the inner copper tube (1) serves as a first flow cavity for the refrigerant, and the inner wall of the inner copper tube (1) is provided with a bore groove (12) for improving the flow disturbance capability, and the bore groove (12) prevents the refrigerant from forming an oil film on the inner wall of the inner copper tube (1); A second flow cavity for the flow of the fluid to be cooled is formed between the outer ring of the inner copper tube (1) and the inner ring of the outer tube (2); The inner copper tube (1) serves as a medium for heat conduction between the fluid to be cooled and the refrigerant.

2. The phase change heat exchanger according to claim 1, characterized in that: The outer tube (2) comprises a first sub-petal (21) and a second sub-petal (22), wherein the first sub-petal (21) and the second sub-petal (22) are combined to form the outer tube (2), and the inner walls of the first sub-petal (21) and the second sub-petal (22) are both provided with a semicircular annular baffle (211), and the inner ring size of the baffle (211) is adapted to the diameter of the inner copper tube (1).

3. The phase change heat exchanger according to claim 2, characterized in that: The baffles (211) in the outer tube (2) are alternately distributed along the axial direction.

4. The phase change heat exchanger according to claim 3, characterized in that: The baffle plate (211) is provided with a plurality of through holes (212).

5. The phase change heat exchanger according to claim 2, characterized in that: Two limiting rings (11) are provided on the circumference of the inner copper tube (1), and the inner distance between the two limiting rings (11) is equal to the length of the outer tube (2).

6. The phase change heat exchanger according to claim 1, characterized in that: One side of the input end of the inner copper tube (1) is connected to a first temperature sensor (4), and one side of the output end of the inner copper tube (1) is connected to a second temperature sensor (5).

7. The phase change heat exchanger according to claim 1, characterized in that: The outer tube (2) is provided with a fluid inlet and a fluid outlet, the fluid inlet is connected to an input pipeline (7), the input pipeline (7) is connected to a third temperature sensor (9), the fluid outlet is connected to an output pipeline (6), and the output pipeline (6) is connected to a fourth temperature sensor (8).

8. The phase change heat exchanger according to claim 1, characterized in that: A sealing ring (3) is installed at the sealing point between the inner copper tube (1) and the outer tube (2), and the inner ring and the outer ring of the sealing ring (3) are both provided with a plurality of barrier rings (31).

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