Double-pipe heat exchanger and heat pump heat exchange system

Abstract

The utility model relates to a double-pipe heat exchanger and a heat pump heat exchange system.The double-pipe heat exchanger comprises a flow dividing pipe, a flow collecting pipe and a plurality of heat exchange sleeve units, and each heat exchange sleeve unit is provided with a first medium opening and a second medium opening. The first medium openings in the multiple heat exchange sleeve units are all connected with the flow dividing pipe, and the second medium openings in the multiple heat exchange sleeve units are all connected with the flow collecting pipe, so that each heat exchange sleeve unit forms a heat exchange module capable of independently exchanging heat. According to the double-pipe heat exchanger, the problems that when a conventional double-pipe heat exchanger goes wrong or is damaged in the production or use process, the whole double-pipe heat exchanger needs to be maintained or dismantled and replaced, so that the material loss is large, and the cost is high are solved.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange settings, and in particular to a shell-and-tube heat exchanger and a heat pump heat exchange system. Background Art

[0002] The shell and tube heat exchanger has a simple structure and high heat exchange efficiency, so it is often used in heat pump heat exchange systems. Common shell and tube heat exchangers are usually made of a relatively long heat exchange shell spirally coiled and connected to the heat pump heat exchange system. However, during the production or use process, the shell and tube heat exchanger has problems or is damaged, and it is necessary to repair or dismantle and replace the entire shell and tube heat exchanger, which leads to large material losses and high costs. Utility Model Content

[0003] Based on this, it is necessary to provide a shell and tube heat exchanger and a heat pump heat exchange system to solve the problem that when a conventional shell and tube heat exchanger has problems or is damaged during production or use, the entire shell and tube heat exchanger needs to be repaired or dismantled and replaced, resulting in large material losses and high costs.

[0004] In order to solve the above technical problems, this application provides the following technical solutions:

[0005] The shell and tube heat exchanger includes a shunt pipe, a header and a heat exchange shell unit. The number of the heat exchange shell units is configured to be multiple, and each of the heat exchange shell units is provided with a first medium port and a second medium port; the first medium port on each of the heat exchange shell units is connected to the shunt pipe, and the second medium port on each of the heat exchange shell units is connected to the header, so that each of the heat exchange shell units forms a heat exchange module that can independently exchange heat.

[0006] In one embodiment, each of the heat exchange sleeve units includes at least one heat exchange sleeve, and the heat exchange sleeve includes an inner tube and an outer tube, the outer tube is sleeved on the inner tube, and a heat exchange channel is formed between the inner circumferential wall of the outer tube and the outer circumferential wall of the inner tube; wherein the first medium port includes a first inlet and a first outlet, and the second medium port includes a second inlet and a second outlet, the first inlet and the first outlet are opened on the outer tube and are respectively connected to the heat exchange channel, and the second inlet and the second outlet are opened on the inner tube.

[0007] It can be understood that, with such an arrangement, in each heat exchange sleeve, the medium in the inner tube exchanges heat with the medium in the heat exchange channel.

[0008] In one embodiment, the shunt pipe includes a first shunt pipe and a second shunt pipe, and the header includes a first header and a second header;

[0009] The first inlet of each heat exchange sleeve unit is connected to the first diverter pipe, and the first outlet of each heat exchange sleeve unit is connected to the first collecting pipe; the second inlet of each heat exchange sleeve unit is connected to the second diverter pipe, and the second outlet of each heat exchange sleeve unit is connected to the second collecting pipe. It can be understood that, with such an arrangement, the refrigerant in the first diverter pipe flows into the corresponding multiple heat exchange channels through multiple first inlets respectively, and then is gathered from the corresponding multiple heat exchange channels into the first collecting pipe through multiple first outlets; the refrigerant in the second diverter pipe is diverted into the corresponding multiple inner tubes through multiple second inlets, and then is gathered from the corresponding multiple inner tubes into the second collecting pipe through multiple second outlets.

[0010] In one embodiment, a first protrusion or a first recess is provided on the inner circumferential wall of the outer tube, and the first protrusion or the first recess is located in the heat exchange channel; and / or a second protrusion or a second recess is provided on the outer circumferential wall and / or the inner circumferential wall of the inner tube, and the second protrusion or the second recess located on the outer circumferential wall of the inner tube is located in the heat exchange channel. It is understandable that, in such a configuration, the first protrusion or the first recess, and / or the second protrusion or the second recess can disturb the medium in the heat exchange channel and the inner tube, thereby improving the heat exchange effect between the refrigerant and the secondary coolant.

[0011] In one embodiment, the first protrusion or the first recessed portion is provided on the inner circumferential wall of the outer tube, and the second protrusion or the second recessed portion is provided on the inner circumferential wall of the inner tube; wherein the first protrusion or the first recessed portion is provided in a spiral shape and extends along the axial direction of the inner tube; and the second protrusion or the second recessed portion is provided in a spiral shape and extends along the axial direction of the outer tube.

[0012] It can be understood that, with such a configuration, the first protrusion or the first recessed portion can form a turbulence for the coolant at each position in the heat exchange channel along the axial direction of the outer tube, and the second protrusion or the second recessed portion can form a turbulence for the refrigerant at each position in the inner tube along the axial direction of the inner tube, and the spiral configuration makes the extension length of the first protrusion or the first recessed portion, the second protrusion or the second recessed portion longer, thereby further enhancing the turbulence for the coolant and the refrigerant, which is beneficial to further improve the heat exchange effect between the refrigerant and the coolant.

[0013] In one embodiment, the spiral direction of the first protrusion or the first recess is opposite to the spiral direction of the second protrusion or the second recess.

[0014] In one embodiment, along the axial direction of the heat exchange sleeve, the first inlet is relatively located below the second inlet, and the first outlet is relatively located above the second outlet; and / or, the flow direction of the medium in the heat exchange channel is opposite to the spiral direction of the first protrusion or the first recessed portion, and the flow direction of the medium in the inner tube is opposite to the spiral direction of the second protrusion or the second recessed portion.

[0015] It is understandable that, with such a configuration, the secondary coolant in the heat exchange channel and the refrigerant in the inner tube exchange heat by convection, and the temperature difference is greater, which is conducive to improving the heat exchange effect. The secondary coolant is more likely to impact the first protrusion or the first recessed portion during the flow in the heat exchange channel, thereby improving the turbulence effect of the first protrusion or the first recessed portion on the secondary coolant. Also, the refrigerant is more likely to impact the second protrusion or the second recessed portion during the flow in the inner tube, which can improve the turbulence effect of the second protrusion or the second recessed portion on the refrigerant.

[0016] In one embodiment, the number of heat exchange sleeves is set to at least two, each heat exchange sleeve is arranged in a spiral shape, and at least two heat exchange sleeves are arranged in a sleeve manner. In the radial direction of the heat exchange sleeve, two adjacent heat exchange sleeves are arranged at intervals. It can be understood that such an arrangement can not only effectively improve the heat exchange effect of a single heat exchange sleeve unit, but also make the structure of a single heat exchange sleeve unit more compact, thereby effectively saving the installation space required for the heat exchange sleeve unit, and also avoiding friction between two adjacent heat exchange sleeves, and is conducive to reducing the heat exchange interference between two adjacent heat exchange sleeves.

[0017] In one embodiment, the heat exchange sleeve unit further includes a fixing belt and an isolation plate, wherein the fixing belt is used to bundle and connect at least two heat exchange sleeves. The isolation plate is arranged between two adjacent heat exchange sleeves. It can be understood that, in such an arrangement, the isolation plate allows the two adjacent heat exchange sleeves to be arranged at a distance, thereby reducing the friction between the two adjacent heat exchange sleeves, and also reducing the heat exchange interference between the two adjacent heat exchange sleeves. The fixing belt is used to bundle at least two heat exchange sleeves together to form an integral heat exchange sleeve unit, thereby facilitating the assembly of each heat exchange sleeve unit.

[0018] In one embodiment, each of the heat exchange sleeve units further includes a connecting pipe, the connecting pipe is connected to both ends of the outer tube of each heat exchange sleeve, and the connecting pipe is provided with a first interface (71), a second interface and a third interface; wherein the first interface is connected to the outer tube, the second interface is communicated with the heat exchange channel and is connected to the corresponding shunt tube or header, and the inner tube passes through the third interface and is connected to the corresponding shunt tube or header. It can be understood that, in such a configuration, the connecting pipe is used to connect the heat exchange sleeve to the shunt tube or header, and serves to isolate the refrigerant from the coolant.

[0019] This application also provides the following technical solutions:

[0020] A heat pump heat exchange system comprises the shell and tube heat exchanger of any one of the above embodiments.

[0021] Compared with the prior art, the shell and tube heat exchanger provided by the present application forms an independent heat exchange module for each heat exchange shell and tube unit. When any one or several heat exchange shell and tube units have problems or are damaged, the heat exchange of other heat exchange shell and tube units will not be affected. Therefore, only the heat exchange shell and tube unit that has problems or is damaged needs to be repaired or replaced, without the need to repair or replace the entire shell and tube heat exchanger. In this way, material loss can be effectively reduced, thereby reducing costs. In addition, when one or several heat exchange shell and tube units in the shell and tube heat exchanger are damaged, the damaged heat exchange shell and tube unit can be blocked to cut off the connection between it and the diverter pipe and the header, so that the shell and tube heat exchanger can still be used normally when the damaged heat exchange shell and tube unit is repaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the shell and tube heat exchanger provided in this application.

[0024] Figure 2 for Figure 1 Enlarged schematic diagram at A.

[0025] Figure 3 It is a schematic diagram of the assembly of the heat exchanger shell and tube unit, the branch pipe and the collecting pipe.

[0026] Figure 4 for Figure 3 Exploded diagram.

[0027] Figure 5 It is a top view of the heat exchanger shell and tube unit.

[0028] Figure 6 This is a bottom view of the heat exchanger shell and tube unit.

[0029] Figure 7 This is the front view of the heat exchanger shell and tube unit.

[0030] Figure 8 for Figure 7 Cross-sectional view at BB.

[0031] The reference numerals of the components are as follows:

[0032] 10. shunt pipe; 11. first shunt pipe; 12. second shunt pipe; 20. header; 21. first header; 22. second header; 30. heat exchanger sleeve unit; 31. first medium port; 32. second medium port; 40. heat exchanger sleeve; 41. inner pipe; 411. second inlet; 412. second outlet; 42. outer pipe; 421. first inlet; 422. first outlet; 43. heat exchange channel; 50. fixing belt; 60. isolation plate; 61. notch; 70. connecting pipe; 71. first interface; 72. second interface; 73. third interface; 74. inlet pipe; 75. outlet pipe. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0038] See also Figure 1The present application provides a shell and tube heat exchanger, which includes a shunt pipe 10, a header pipe 20 and a heat exchange shell and tube unit 30. The number of the heat exchange shell and tube units 30 is configured to be multiple, and each heat exchange shell and tube unit 30 is provided with a first medium port 31 and a second medium port 32. The first medium port 31 on each heat exchange shell and tube unit 30 is connected to the shunt pipe 10, and the second medium port 32 on each heat exchange shell and tube unit 30 is connected to the header pipe 20, so that each heat exchange shell and tube unit 30 forms a heat exchange module that can exchange heat independently. In this way, by making each heat exchange shell and tube unit 30 form an independent heat exchange heat exchange module, when any one or several heat exchange shell and tube units 30 have problems or are damaged in operation, it will not affect the heat exchange of other heat exchange shell and tube units 30, so only the heat exchange shell and tube unit 30 that has problems or is damaged needs to be repaired or replaced, without the need to repair or replace the entire shell and tube heat exchanger. In this way, material loss can be effectively reduced, thereby reducing costs. Furthermore, when one or more heat exchanger sleeve units 30 in the shell-and-tube heat exchanger are damaged, the damaged heat exchanger sleeve unit 30 can be sealed to cut off the connection between it and the diverter pipe 10 and the collecting pipe 20, so that the shell-and-tube heat exchanger can still be used normally while the damaged heat exchanger sleeve unit 30 is repaired.

[0039] See also Figures 3 to 8 ,in, Figure 3 It is a schematic diagram of the assembly of a heat exchange casing unit, a flow distribution pipe and a flow collecting pipe; Figure 4 for Figure 3 Exploded diagram of Figure 5 It is a top view of a heat exchange casing unit; Figure 6 This is a bottom view of a heat exchanger casing unit. Figure 7 It is a front view of a heat exchange casing unit; Figure 8 for Figure 7 Cross-sectional view at BB.

[0040] In one embodiment, each heat exchange sleeve unit 30 includes at least one heat exchange sleeve 40, each heat exchange sleeve 40 includes an inner tube 41 and an outer tube 42, the outer tube 42 is sleeved on the inner tube 41, and a heat exchange channel 43 is formed between the inner circumferential wall of the outer tube 42 and the outer circumferential wall of the inner tube 41. Among them, the first medium port 31 includes a first inlet 421 and a first outlet 422, the second medium port 32 includes a second inlet 411 and a second outlet 412, the first inlet 421 and the first outlet 422 are opened on the outer tube 42 and are respectively connected to the heat exchange channel 43, and the second inlet 411 and the second outlet 412 are opened on the inner tube 41. In this way, in each heat exchange sleeve 40, the medium in the inner tube 41 exchanges heat with the medium in the heat exchange channel 43. The medium flows into the inner tube 41 through the second inlet 411 and then flows out of the inner tube 41 through the second outlet 412 ; the medium flows into the heat exchange channel 43 through the first inlet 421 and then flows out of the heat exchange channel 43 through the first outlet 422 .

[0041] Here, the medium flowing through the inner tube 41 is one of the refrigerant and the coolant, and the medium flowing through the heat exchange channel 43 is the other of the refrigerant and the coolant. The refrigerant and the coolant exchange heat, the refrigerant heat release temperature decreases, and the coolant heat absorption temperature increases. Optionally, the coolant can be configured as chilled water. The following takes the inner tube 41 for circulating the refrigerant and the heat exchange channel 43 for circulating the coolant as an example to introduce the circulation process of the refrigerant and the coolant in the shell-and-tube heat exchanger.

[0042] Please continue reading Figures 3 to 6 , the flow divider 10 includes a first flow divider 11 and a second flow divider 12, and the header 20 includes a first header 21 and a second header 22. The first inlet 421 on each heat exchange sleeve unit 30 is connected to the first flow divider 11, and the first outlet 422 on each heat exchange sleeve unit 30 is connected to the first header 21. The second inlet 411 on each heat exchange sleeve unit 30 is connected to the second flow divider 12, and the second outlet 412 on each heat exchange sleeve unit 30 is connected to the second header 22. In this way, the refrigerant in the first flow divider 11 flows into the corresponding multiple heat exchange channels 43 through the multiple first inlets 421, and then, it is collected from the corresponding multiple heat exchange channels 43 through the multiple first outlets 422 and enters the first header 21; the refrigerant in the second flow divider 12 flows into the corresponding multiple inner tubes 41 through the multiple second inlets 411, and then, it is collected from the corresponding multiple inner tubes 41 through the multiple second outlets 412 and enters the second header 22.

[0043] In other words, the first inlets 421 on the plurality of outer tubes 42 are all connected to the first shunt tube 11, and the first outlets 422 on the plurality of outer tubes 42 are all connected to the first header 21. The second inlets 411 on the plurality of inner tubes 41 are all connected to the second shunt tube 12, and the second outlets 412 on the plurality of inner tubes 41 are all connected to the second header 22.

[0044] For further information, please refer to Figures 3 to 6 Each heat exchange sleeve unit 30 further includes a connecting pipe 70, which is connected to both ends of the outer tube 42 of each heat exchange sleeve 40, and is provided with a first interface 71, a second interface 72 and a third interface 73. The first interface 71 is connected to the outer tube 42, the second interface 72 is communicated with the heat exchange channel 43, and is connected to the corresponding shunt pipe 10 or header 20, and the inner tube 41 passes through the third interface 73 and is connected to the corresponding shunt pipe 10 or header 20. That is, the connecting pipe 70 is used to connect the heat exchange sleeve 40 to the shunt pipe 10 or header 20, and plays a role in isolating the refrigerant from the coolant.

[0045] Specifically, each outer tube 42 is connected to a connecting tube 70 at both ends, and the two connecting tubes 70 are defined as an inlet connecting tube 74 and an outlet connecting tube 75. The first interface 71 of the inlet connecting tube 74 is connected to the first inlet 421; the second interface 72 of the inlet connecting tube 74 is connected to the first shunt tube 11; the third interface 73 of the inlet connecting tube 74 is used for one end of the inner tube 41 to pass through. The first interface 71 of the outlet connecting tube 75 is connected to the first outlet 422; the second interface 72 of the outlet connecting tube 75 is connected to the first manifold 21; the third interface 73 of the outlet connecting tube 75 is used for the other end of the inner tube 41 to pass through.

[0046] Optionally, the connecting pipe 70 is configured as a three-way pipe or a three-way valve.

[0047] like Figure 3 As shown, the number of heat exchange sleeves 40 is set to at least two, each heat exchange sleeve 40 is set in a spiral shape, and at least two heat exchange sleeves 40 are arranged in a sleeve manner; wherein, along the radial direction of the heat exchange sleeve 40, two adjacent heat exchange sleeves 40 are set at intervals.

[0048] In this way, each heat exchange sleeve unit 30 is provided with at least two heat exchange sleeves 40, that is, each independent heat exchange heat exchange module has at least two heat exchange sleeves 40 inside, so that the heat exchange effect of a single heat exchange sleeve unit 30 can be effectively improved. In addition, by setting each heat exchange sleeve 40 in a spiral shape and at least two heat exchange sleeves 40 are arranged in a sleeve manner, the structure of a single heat exchange sleeve unit 30 is more compact, so that the installation space required for the heat exchange sleeve unit 30 can be effectively saved. Further, by setting the interval between two adjacent heat exchange sleeves 40 along the radial direction of the heat exchange sleeve 40, it is possible to avoid mutual friction between the two adjacent heat exchange sleeves 40, and it is also beneficial to reduce the heat exchange interference between the two adjacent heat exchange sleeves 40. In one embodiment, each heat exchange sleeve unit 30 includes two heat exchange sleeves 40. Among them, a spiral heat exchange sleeve 40 is sleeved on the outside of another spiral heat exchange sleeve 40. In this way, when one heat exchange sleeve 40 in the heat exchange sleeve unit 30 is damaged, only the damaged heat exchange sleeve 40 needs to be replaced, and the other heat exchange sleeve 40 can still be used, thereby further reducing material loss.

[0049] Of course, in other embodiments, the number of heat exchange sleeves 40 in each heat exchange sleeve unit 30 can also be configured as three, four, five or six, etc., which is specifically set according to actual needs and is not listed here one by one.

[0050] In one embodiment, if Figure 1 As shown, the heat exchange sleeve 40 in each heat exchange sleeve unit 30 extends spirally along the first direction X. Multiple heat exchange sleeve units 30 are arranged at intervals along the second direction Y. The first shunt pipe 11, the second shunt pipe 12, the first header 21 and the second header 22 are arranged in parallel and extend along the second direction Y. The first direction X is perpendicular to the second direction Y. In this way, it is convenient to arrange multiple heat exchange sleeve units 30.

[0051] Please continue to refer to Figure 1 , along the first direction X, the first flow divider 11 and the second flow collector 22 are located on the same side of the heat exchange jacket unit 30; the second flow divider 12 and the first flow collector 21 are located on the other side opposite to the heat exchange jacket unit 30. In this way, not only the structure of the tubular heat exchanger is made more compact, but also the flow direction of the refrigerant in the inner tube 41 is opposite to the flow direction of the secondary coolant in the heat exchange channel 43.

[0052] Furthermore, along the first direction X, the first flow divider 11 and the second flow header 22 are parallel to and spaced apart from one end face of the heat exchange jacket unit 30 to form a first assembly space, and the inlet pipe 74 is accommodated in the first assembly space. The second flow divider 12 and the first flow header 21 are parallel to and spaced apart from the other end face of the heat exchange jacket unit 30 to form a second assembly space, and the outlet pipe 75 is accommodated in the second assembly space.

[0053] See also Figure 1 and Figure 2 In one embodiment, the heat exchange sleeve unit 30 further includes a fixing belt 50 and an isolation plate 60, wherein the fixing belt 50 is used to bundle and connect at least two heat exchange sleeves 40. The isolation plate 60 is disposed between two adjacent heat exchange sleeves 40. The isolation plate 60 allows the two adjacent heat exchange sleeves 40 to be spaced apart, thereby reducing the friction between the two adjacent heat exchange sleeves 40, and also reducing the heat exchange interference between the two adjacent heat exchange sleeves 40. The fixing belt 50 is used to bundle at least two heat exchange sleeves 40 together to form an integral heat exchange sleeve unit 30, thereby facilitating the assembly of each heat exchange sleeve unit 30. Among them, the fixing belt 50 can be configured as a copper belt, and the isolation plate 60 can be configured as a steel plate. In each heat exchange sleeve unit 30, the number of the fixing belt 50 and the isolation plate 60 can be set according to actual needs.

[0054] Furthermore, along the axial direction of the heat exchange sleeve 40, the end of the isolation plate 60 extends out of the heat exchange sleeve 40, and the fixing belt 50 is clamped on at least two layers of the heat exchange sleeve 40 and abuts against the end of the isolation plate 60. In this way, the isolation plate 60 can be prevented from falling off from two adjacent heat exchange sleeves 40.

[0055] Furthermore, a notch 61 is provided at the end of the isolation plate 60, and the fixing belt 50 is clamped in the notch 61. In this way, the firmness of the connection between the fixing belt 50 and the isolation plate 60 can be improved.

[0056] In one embodiment, a first protrusion or the first recessed portion (not shown) is provided on the inner circumferential wall of the outer tube 42, and the first protrusion or the first recessed portion is located in the heat exchange channel 43; and / or a second protrusion or the second recessed portion (not shown) is provided on the outer circumferential wall and / or the inner circumferential wall of the inner tube 41, and the second protrusion or the second recessed portion located on the outer circumferential wall of the inner tube 41 is provided in the heat exchange channel 43. In other words, the inner circumferential wall of the outer tube 42 may be provided with a first protrusion or a first depression, or the outer circumferential wall of the inner tube 41 may be provided with a second protrusion or a second depression; or, the inner circumferential wall of the outer tube 42 may be provided with a first protrusion or a first depression, or the inner circumferential wall of the inner tube 41 may be provided with a second protrusion or a second depression; or, the inner circumferential wall of the outer tube 42 may be provided with a first protrusion or a first depression, and the outer circumferential wall of the inner tube 41 may be provided with a second protrusion or a second depression; or, the inner circumferential wall of the outer tube 42 may be provided with a first protrusion or a first depression, and the inner circumferential wall of the inner tube 41 may be provided with a second protrusion or a second depression; or, the inner circumferential wall of the outer tube 42 may be provided with a first protrusion or a first depression, and the inner circumferential wall of the inner tube 41 may be provided with a second protrusion or a second depression, and the outer circumferential wall of the inner tube 41 may be provided with a second protrusion or a second depression. Of course, no matter which case, the goal of the first protrusion or the first recessed portion, the second protrusion or the second recessed portion is to disturb the medium, thereby increasing the heat exchange coefficient between the refrigerant and the coolant, thereby improving the heat exchange effect between the refrigerant and the coolant.

[0057] For example, in this embodiment, the inner circumferential wall of the outer tube 42 is provided with a first protrusion or a first recess, the inner circumferential wall of the inner tube 41 is provided with a second protrusion or a second recess, and the outer circumferential wall of the inner tube 41 is provided with a second protrusion or a second recess. Thus, the first protrusion or the first recess can disturb the refrigerant in the heat exchange channel 43. The second protrusion or the second recess on the inner circumferential wall of the inner tube 41 can disturb the refrigerant in the inner tube 41. In this way, the disturbance at multiple locations can increase the heat exchange coefficient between the refrigerant and the refrigerant, thereby improving the heat exchange effect between the refrigerant and the refrigerant.

[0058] Preferably, the first protrusion is configured as a first protrusion, and the first recess is configured as a first groove. The second protrusion is configured as a second protrusion, and the second recess is configured as a second groove. That is, the outer peripheral wall and / or the inner peripheral wall of the inner tube 41 is provided with a second protrusion or a second groove.

[0059] In one embodiment, a first protrusion or a first recess is provided on the inner circumferential wall of the outer tube 42, and a second protrusion or a second recess is provided on the inner circumferential wall of the inner tube 41. The first protrusion or the first recess and the second protrusion or the second recess are both arranged in a spiral shape and extend along the axial direction of the outer tube 42 or the inner tube 41. In this way, the first protrusion or the first recess can form a turbulent flow for the brine at each position in the heat exchange channel 43 along the axial direction of the outer tube, and the second protrusion or the second recess can form a turbulent flow for the refrigerant at each position in the inner tube along the axial direction of the inner tube. In addition, the spiral arrangement makes the extension length of the first protrusion or the first recess and the second protrusion or the second recess longer, thereby further improving the turbulent flow for the brine and the refrigerant, which is conducive to further improving the heat exchange effect between the refrigerant and the brine.

[0060] Here, the first protrusion or the first recess is arranged in a spiral shape and extends along the axial direction of the inner tube 41. The second protrusion or the second recess is arranged in a spiral shape and extends along the axial direction of the outer tube 42. For example, a thread groove is provided on the inner circumferential wall of the outer tube 42 and the inner tube 41. In this case, the groove thread teeth on the thread form the corresponding first protrusion or the first recess and the second protrusion or the second recess.

[0061] Of course, the first protrusion or the first recess can also be arranged in the inner tube in a dotted shape. Similarly, the first protrusion or the second recess can also be arranged in the outer tube in a dotted shape.

[0062] Further, the spiral direction of the first protrusion or the first recess is opposite to the spiral direction of the second protrusion or the second recess. However, it is not limited thereto. In another embodiment, the spiral direction of the first protrusion or the first recess may be the same as the spiral direction of the second protrusion or the second recess.

[0063] In one embodiment, along the axial direction of the heat exchange sleeve 40, the first inlet 421 is relatively located below the second inlet 411, and the first outlet 422 is relatively located above the second outlet 412. In this way, the medium in the inner tube 41 flows from top to bottom, while the medium in the outer tube 42 flows from bottom to top, that is, the flow direction of the medium in the heat exchange channel 43 is opposite to the flow direction of the medium in the inner tube 41. In this way, the coolant in the heat exchange channel 43 and the refrigerant in the inner tube 41 are convectively exchanged, and the temperature difference is greater, which is conducive to improving the heat exchange effect. Of course, in other embodiments, the first inlet 421 can also be arranged to be relatively located above the second inlet 411, and the first outlet 422 can be relatively located below the second outlet 412. In this way, the medium in the inner tube 41 flows from bottom to top, while the medium in the outer tube 42 flows from top to bottom, and the flow direction of the medium in the heat exchange channel 43 can also be opposite to the flow direction of the medium in the inner tube 41.

[0064] Exemplarily, along the first direction X (the axial direction of the heat exchange sleeve 40), the first flow divider 11 is located below the first header 21, so that the medium in the outer tube 42 flows from bottom to top along the first direction X. Along the first direction X, the second flow divider 12 is located above the second header 22, so that the medium in the inner tube 41 flows from top to bottom along the first direction X. Of course, the positions of the first flow divider 11 and the first header 21 are interchangeable; similarly, the positions of the second flow divider 12 and the second header 22 are also interchangeable.

[0065] In one embodiment, the flow direction of the medium in the heat exchange channel 43 is opposite to the spiral direction of the first protrusion or the first recess, and the flow direction of the medium in the inner tube 41 is opposite to the spiral direction of the second protrusion or the second recess. The flow direction of the medium in the heat exchange channel 43 is opposite to the spiral direction of the first protrusion or the first recess, so that the refrigerant is more likely to impact the first protrusion or the first recess during the flow in the heat exchange channel 43, so that the turbulence effect of the first protrusion or the first recess on the refrigerant can be improved. Similarly, the flow direction of the medium in the inner tube 41 is opposite to the spiral direction of the second protrusion or the second recess, so that the refrigerant is more likely to impact the second protrusion or the second recess during the flow of the inner tube 41, so that the turbulence effect of the second protrusion or the second recess on the refrigerant can be improved. This is conducive to further improving the heat exchange effect between the refrigerant and the refrigerant.

[0066] The present application also provides a heat pump heat exchange system, which includes the shell and tube heat exchanger described in any one of the above embodiments. The number of shell and tube heat exchangers can also be set to multiple, and multiple shell and tube heat exchangers are connected in parallel in the heat pump heat exchange system. In this way, when any shell and tube heat exchanger has a problem, only the shell and tube heat exchanger with the problem needs to be repaired or replaced, without affecting the normal operation of the heat pump heat exchange system.

[0067] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A shell and tube heat exchanger, characterized in that: The shell-and-tube heat exchanger comprises a flow distribution pipe (10), a flow collecting pipe (20) and a heat exchange shell-and-tube unit (30); the number of the heat exchange shell-and-tube units (30) is configured to be multiple, and each of the heat exchange shell-and-tube units (30) is provided with a first medium port (31) and a second medium port (32); The first medium port (31) on each of the heat exchange sleeve units (30) is connected to the flow distribution pipe (10), and the second medium port (32) on each of the heat exchange sleeve units (30) is connected to the collecting pipe (20), so that each of the heat exchange sleeve units (30) forms a heat exchange module capable of independent heat exchange.

2. The double-tube heat exchanger according to claim 1, characterized in that: Each of the heat exchange sleeve units (30) comprises at least one heat exchange sleeve (40), the heat exchange sleeve (40) comprising an inner tube (41) and an outer tube (42), the outer tube (42) being sleeved on the inner tube (41), and a heat exchange channel (43) being formed between an inner peripheral wall of the outer tube (42) and an outer peripheral wall of the inner tube (41); The first medium port (31) includes a first inlet (421) and a first outlet (422), the second medium port (32) includes a second inlet (411) and a second outlet (412), the first inlet (421) and the first outlet (422) are opened on the outer tube (42) and are respectively connected to the heat exchange channel (43), and the second inlet (411) and the second outlet (412) are opened on the inner tube (41).

3. The double-tube heat exchanger according to claim 2, characterized in that: The flow divider (10) comprises a first flow divider (11) and a second flow divider (12); the flow collector (20) comprises a first flow collector (21) and a second flow collector (22); The first inlet (421) of each heat exchange sleeve unit (30) is in communication with the first flow divider (11), and the first outlet (422) of each heat exchange sleeve unit (30) is in communication with the first header (21); the second inlet (411) of each heat exchange sleeve unit (30) is in communication with the second flow divider (12), and the second outlet (412) of each heat exchange sleeve unit (30) is in communication with the second header (22).

4. The double-tube heat exchanger according to claim 2 or 3, characterized in that: A first protrusion or a first depression is provided on the inner peripheral wall of the outer tube (42), and the first protrusion or the first depression is located in the heat exchange channel (43); And / or, a second protrusion or a second depression is provided on the outer peripheral wall and / or the inner peripheral wall of the inner tube (41), and the second protrusion or the second depression located on the outer peripheral wall of the inner tube (41) is located in the heat exchange channel (43).

5. The double-tube heat exchanger according to claim 4, characterized in that: The first protrusion or the first recess is provided on the inner circumferential wall of the outer tube (42), and the second protrusion or the second recess is provided on the inner circumferential wall of the inner tube (41); The first protrusion or the first recess is arranged in a spiral shape and extends along the axial direction of the inner tube (41); the second protrusion or the second recess is arranged in a spiral shape and extends along the axial direction of the outer tube (42).

6. The double-tube heat exchanger according to claim 5, characterized in that: A spiral direction of the first protrusion or the first depression is opposite to a spiral direction of the second protrusion or the second depression.

7. The double-tube heat exchanger according to claim 2 or 6, characterized in that: Along the axial direction of the heat exchange sleeve (40), the first inlet (421) is relatively located below the second inlet (411), and the first outlet (422) is relatively located above the second outlet (412); And / or, the flow direction of the medium in the heat exchange channel (43) is opposite to the spiral direction of the first protrusion or the first recess, and the flow direction of the medium in the inner tube (41) is opposite to the spiral direction of the second protrusion or the second recess.

8. The double-tube heat exchanger according to claim 2, characterized in that: The number of the heat exchange sleeves (40) is set to at least two, each of the heat exchange sleeves (40) is arranged in a spiral shape, and at least two of the heat exchange sleeves (40) are arranged in a sleeve-like manner; Wherein, along the radial direction of the heat exchange sleeve (40), two adjacent heat exchange sleeves (40) are arranged at intervals.

9. The double-tube heat exchanger according to claim 8, characterized in that: The heat exchange sleeve unit (30) further comprises a fixing belt (50) and an isolation plate (60), wherein the fixing belt (50) is used to bind and connect at least two heat exchange sleeves (40); The isolation plate (60) is arranged between two adjacent heat exchange sleeves (40).

10. The double-tube heat exchanger according to claim 2, characterized in that: Each of the heat exchange sleeve units (30) further comprises a connecting pipe (70), the connecting pipe (70) being connected to both ends of the outer pipe (42) of each of the heat exchange sleeves (40), and the connecting pipe (70) being provided with a first interface (71), a second interface (72) and a third interface (73); The first interface (71) is connected to the outer tube (42), the second interface (72) is communicated with the heat exchange channel (43) and is connected to the corresponding flow divider tube (10) or flow collector (20), and the inner tube (41) passes through the third interface (73) and is connected to the corresponding flow divider tube (10) or flow collector (20).

11. A heat pump heat exchange system, characterized in that: It comprises the shell and tube heat exchanger as described in any one of claims 1 to 10.

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