Drainage mechanism, heat exchange unit and heat exchange equipment

Abstract

The application discloses a drainage mechanism, a heat exchange unit and a heat exchange equipment. The drainage mechanism comprises a drainage member, the drainage member extends along the length direction of a heat exchange pipe, the drainage member is provided with a drainage surface facing the outer side wall surface of the heat exchange pipe, and the drainage surface is suitable for forming a climbing gap between the outer side wall surface of the heat exchange pipe. The climbing gap is formed between the drainage surface and the heat exchange pipe, so that the medium flows faster in the part with the climbing gap compared with other positions. For example, the oil drops of lubricating oil and the refrigerant in a gaseous state will flow to the outlet along the climbing gap, so that the mixture of the refrigerant and the lubricating oil still flows out of the outlet of the heat exchanger after passing through the heat exchanger, thereby reducing the inner volume of the heat exchanger on one hand and effectively avoiding oil loss of the system on the other hand.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange equipment, in particular to a flow guiding mechanism, a heat exchange unit and a heat exchange equipment. BACKGROUND

[0002] In a refrigeration system, when a shell-and-tube heat exchanger is used as an evaporator of the refrigeration system, refrigerant evaporates into gas in the cavity of the shell, and needs to flow out from the gas outlet at the upper part of the heat exchanger, while the lubricating oil carried by the refrigerant stays in the cavity of the container and cannot flow out with the gas, so as to return to the compressor and cause system failure. Therefore, an additional oil return pipeline and a controller are often needed to be added. However, if the above-mentioned oil return method is used, the cost and volume will be greatly increased, the control is complex, and the reliability of the structure is reduced. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is that the shell-and-tube heat exchanger in the prior art has the defects of great increase in cost and structure volume, complex oil return control and poor system reliability due to the addition of an additional oil return pipeline and a controller.

[0004] Therefore, the present application provides a flow guiding mechanism suitable for being installed in cooperation with a heat exchange tube, comprising:

[0005] A flow guiding member extends along the length direction of the heat exchange tube; the flow guiding member has a flow guiding surface arranged towards the outer side wall surface of the heat exchange tube, and the flow guiding surface is suitable for forming a climbing gap with the outer side wall surface of the heat exchange tube.

[0006] Optionally, the flow guiding surface is a closed surface in the radial direction of the heat exchange tube.

[0007] Optionally, the flow guiding mechanism has a tubular structure, the heat exchange tube can be arranged inside the tubular structure, and the inner wall surface of the tubular structure is the flow guiding surface.

[0008] The closed surface is a square, a circle or an ellipse.

[0009] Optionally, the flow guiding mechanism further comprises a mounting member, a plurality of mounting holes are arranged on the mounting member, and the tubular structure is fixedly installed in the mounting holes.

[0010] Optionally, the flow guiding member has a columnar structure, a plurality of flow guiding holes are arranged along the length direction of the columnar structure, the flow guiding holes are through-hole structures, the heat exchange tube can be arranged inside the flow guiding holes, and the inner side wall surface of the flow guiding hole is the flow guiding surface.

[0011] Optionally, the above-mentioned drainage mechanism, the drainage member is a plurality of sheet structures, the sheet structures are adapted to be arranged along the outer circumferential wall surface of the heat exchange pipe, and the drainage surface is a circular arc surface or a plane.

[0012] A heat exchange unit, comprising

[0013] A shell having a refrigeration cavity adapted to flow a refrigeration circulating medium;

[0014] A heat exchange mechanism having a heat exchange pipe installed in the shell, the heat exchange pipe being adapted to flow a cold carrier medium;

[0015] And a drainage mechanism installed in the shell, the drainage surface and the outer circumferential wall surface of the heat exchange pipe form a climbing gap suitable for the refrigeration circulating medium to climb.

[0016] Optionally, the above-mentioned heat exchange unit further comprises a first partition plate and a second partition plate;

[0017] The first partition plate and the second partition plate are installed in the shell, the first partition plate and the shell enclose a first cavity, and the second partition plate and the shell enclose a second cavity; both ends of the heat exchange pipe are connected with the first partition plate and the second partition plate to communicate the first cavity and the second cavity, and the first cavity and the second cavity are adapted to flow the cold carrier medium.

[0018] Optionally, the above-mentioned heat exchange unit, the first partition plate and the second partition plate are arranged in parallel.

[0019] Optionally, the above-mentioned heat exchange unit, the mounting member of the drainage mechanism is fixedly connected with the inner wall surface of the shell.

[0020] Optionally, the above-mentioned heat exchange unit, the heat exchange pipe comprises a pipe body and a fin portion, the fin portion is arranged in a protruding structure on the inner circumferential wall surface or the outer circumferential wall surface of the pipe body.

[0021] Optionally, the above-mentioned heat exchange unit, the heat exchange pipe is a threaded pipe or an embossed pipe or a pressed flower pipe or a pin pipe.

[0022] A heat exchange device, characterized in that it comprises a heat exchange unit.

[0023] Optionally, the above-mentioned heat exchange device further comprises:

[0024] A pressure sending unit, both ends of the pressure sending unit are respectively communicated with a first refrigerant interface and a second refrigerant interface of the shell, and the pressure sending unit is adapted to flow the refrigeration circulating medium into or out of the refrigeration cavity;

[0025] A pumping unit, two ends of the pumping unit are communicated with the first or second cold carrier interface of the shell respectively, and the pumping unit is suitable for flowing in or out the cold carrier medium to the heat exchange pipe.

[0026] The technical scheme provided by the present application has the following advantages:

[0027] 1. The drainage mechanism provided by the present application forms a climbing gap between the drainage surface and the heat exchange pipe, so that the medium flows faster in the part with the climbing gap than in other positions. For example, the oil drops of lubricating oil and the refrigerant in the gaseous state will flow along the climbing gap to the outlet, so that the mixture of the refrigerant and the lubricating oil in the refrigeration circulating medium will still flow out of the outlet of the heat exchanger after passing through the heat exchanger, thereby reducing the inner volume of the heat exchanger on the one hand and effectively avoiding oil loss of the system on the other hand.

[0028] 2. The drainage mechanism provided by the present application is in the form of a closed surface, which is convenient for use and manufacture, and is convenient for installation between the actual drainage member and the heat exchange pipe.

[0029] 3. The drainage mechanism provided by the present application improves the subsequent assembly efficiency through the setting of the mounting member.

[0030] 4. The heat exchange unit provided by the present application is cooperatively arranged by the heat exchange mechanism and the shell. When used as an evaporator, the refrigerant is in full liquid boiling in the refrigeration cavity, the heat exchange efficiency is high, and the oil return is convenient and reliable. When used as a condenser, it has the same function as the traditional shell and tube condenser.

[0031] 5. The heat exchange unit provided by the present application is provided with the fin part arranged on the outer circumferential wall surface of the pipe body, which further promotes the disturbance of the fluid, so as to make the heat transfer boundary layer constantly break, further strengthen the heat exchange, and improve the heat exchange efficiency. The fin part arranged on the inner circumferential wall surface of the pipe body further improves the heat exchange capacity of the cold carrier medium flowing inside and the pipe body. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present application or the technical scheme in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0033] Figure 1 The structure diagram of the heat exchange unit provided in the embodiments of the present application;

[0034] Figure 2 FIG. 1 is a structural schematic view of a heat exchange unit provided in an embodiment of the present application;

[0035] Figure 3 FIG. 2 is a structural schematic view of a heat exchange unit provided in an embodiment of the present application;

[0036] BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 1 - heat exchange pipe;

[0038] 2 - flow guide; 21 - flow guide surface; 22 - flow guide hole;

[0039] 3 - mounting member;

[0040] 4 - housing; 41 - first refrigerant interface; 42 - second refrigerant interface; 43 - first carrier fluid interface; 44 - second carrier fluid interface;

[0041] 5 - first partition;

[0042] 6 - second partition;

[0043] d - climbing gap; DETAILED DESCRIPTION

[0044] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0045] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] Example 1

[0049] This embodiment provides a flow guiding mechanism suitable for installation with heat exchange tube 1, such as... Figures 1 to 3 As shown, it includes: a flow guide 2, which extends along the length of the heat exchange tube 1; the flow guide 2 has a flow guide surface 21 disposed toward the outer wall of the heat exchange tube 1, and the flow guide surface 21 is adapted to form a climbing gap d between itself and the outer wall of the heat exchange tube 1.

[0050] Specifically in this embodiment, such as Figure 2 As shown, the flow guide 2 is a tube structure. In actual installation and use, the heat exchange tube 1 passes through the inner side of the tube structure, so the inner wall surface of the tube structure is the flow guide surface 21. For example, the tube can be a circular tube, and the cross-section of the circular tube along the radial direction of the heat exchange tube 1 is the closed surface. In this embodiment, a tube structure with a circular closed surface is selected. Of course, in optional embodiments, the closed surface can also be square, rectangular, or elliptical, as long as it can form a climbing gap d.

[0051] like Figure 2 As shown, the drainage mechanism provided in this embodiment also includes a mounting component 3, which has several mounting holes. The tube structure is fixedly installed in the mounting holes. The mounting holes and the drainage component 2 can be connected by welding or insertion.

[0052] The first variation of this embodiment is as follows: the shape of the drainage component 2 is changed, and the mounting component 3 is not provided, such as... Figure 3As shown, the flow guide 2 can also have a cylindrical structure, which can be welded with the inner wall of the shell 4 during installation of the actual main body structure, to achieve installation of the flow guide 2; the cylindrical structure is provided with a plurality of flow guide holes 22 along the length direction of the cylinder, and the flow guide hole 22 is a through-hole structure; in actual use, the heat exchange pipe 1 can be arranged inside the flow guide hole 22, and the inner side wall of the flow guide hole 22 is the flow guide surface 21. The above-mentioned flow guide 2 can still form the climbing gap d between the flow guide surface 21 and the heat exchange pipe 1. The flow guide 2 of the above-mentioned structure has a closed surface in the cross section along the radial direction of the heat exchange pipe 1; the shape of the closed surface can be circular, oval, square or rectangular, as long as the climbing gap d can be formed.

[0053] The second variant of the embodiment is as follows: the shape of the flow guide 2 is changed, but the mounting part 3 is still provided, the flow guide 2 has a plurality of sheet structures, the sheet structure is suitable for being arranged along the outer peripheral wall of the heat exchange pipe 1, and the flow guide surface 21 is a circular arc surface or a plane. At this time, the flow guide surface 21 is a non-closed surface in the cross section along the radial direction of the heat exchange pipe 1; and the actual transmission of the refrigeration cycle medium is in the direction of the sheet.

[0054] The flow guide mechanism provided by the embodiment forms the climbing gap d between the flow guide surface 21 and the heat exchange pipe 1, so that compared with other positions, the part with the climbing gap d has a faster medium flow, for example, the oil droplets of the lubricating oil in the refrigeration cycle medium and the refrigerant in the gaseous state will flow to the outlet along the climbing gap d, to ensure that the mixture of the refrigerant and the lubricating oil will still flow out of the outlet of the heat exchanger after passing through the heat exchanger, thereby reducing the inner volume of the heat exchanger on the one hand and effectively avoiding oil loss of the system on the other hand.

[0055] Embodiment 2

[0056] The embodiment provides a heat exchange unit, which comprises a shell 4, a heat exchange mechanism and the flow guide mechanism provided in the embodiment 1. The shell 4 has a refrigeration cavity suitable for flowing the refrigeration cycle medium; the heat exchange mechanism has a heat exchange pipe installed in the shell 4, and the heat exchange pipe 1 is suitable for flowing the cold medium; and the flow guide mechanism is installed in the shell 4, and the flow guide surface and the outer peripheral wall of the heat exchange pipe 1 form a climbing gap d suitable for climbing of the refrigeration cycle medium.

[0057] The heat exchange pipe 1 provided by the embodiment comprises a pipe body and a first fin part, wherein the first fin part is arranged in a protruding structure on the outer peripheral wall of the pipe body. That is, the heat exchange pipe 1 is an external tooth pipe.

[0058] Of course, in other alternative embodiments, the heat exchange pipe 1 further comprises a second fin portion, which is arranged on the outer circumferential wall surface of the pipe body in a protruding structure. The arrangement of the fin portion on the outer circumferential wall surface of the pipe body further promotes the disturbance of the fluid, so that the heat transfer boundary layer is constantly broken, further strengthening the heat exchange, and improving the heat exchange efficiency. The fin portion arranged on the inner circumferential wall surface of the pipe body further improves the heat exchange capacity of the internal flow-through cold carrier medium and the pipe body.

[0059] In other alternative embodiments, the heat exchange pipe is one of a threaded pipe, a corrugated pipe, a patterned pipe, a pin pipe, a sintered pipe, a sandblasted pipe, and a concave point pipe, all of which can achieve heat exchange of the heat exchange pipe.

[0060] In the embodiment, the heat exchange unit further comprises a first partition plate 5 and a second partition plate 6, both of which are installed in the shell. Specifically, the first partition plate 5 and the second partition plate 6 are both welded on the inner wall surface of the shell 4, the first partition plate 5 is provided with a plurality of first connecting holes, the second partition plate 6 is provided with a plurality of second connecting holes, and the two ends of the heat exchange pipe 1 are connected with the first connecting holes and the second connecting holes. In the embodiment, the first partition plate and the second partition plate are arranged in parallel.

[0061] As for the connection and installation mode between the first partition plate 5 and the second partition plate 6 and the heat exchange pipe 1, it can be achieved by welding or expansion. As long as the first partition plate 5, the second partition plate 6 and the heat exchange pipe are sealed and installed, it is acceptable.

[0062] In the embodiment, as shown in Figure 1 The shell comprises a first refrigerant interface 41 and a second refrigerant interface 42 arranged on the left side thereof, and a first cold carrier interface 43 and a second cold carrier interface 44 arranged on the right side thereof, and the first partition plate 5 and the second partition plate 6 are arranged close to the first cold carrier interface 43 and the second cold carrier interface 44, respectively.

[0063] In addition, the first partition plate 5 and the shell 4 jointly enclose a first cavity, and the second partition plate 6 and the shell 4 jointly enclose a second cavity, so that the first cavity, the second cavity and the heat exchange pipe jointly flow through the cold carrier medium.

[0064] In the embodiment, the mounting member of the flow guide mechanism is fixedly connected with the inner wall surface of the shell. For example, the side wall surface of the mounting member and the inner wall surface of the shell are welded with each other to realize the fixation of the two.

[0065] The heat exchange unit provided in the embodiment has the following specific use process:

[0066] Firstly, the refrigeration cavity stores refrigeration cycle medium, i.e. stores mixture of liquid refrigerant and lubricating oil, the bottom of the flow guide 2 is inserted below the liquid level of the refrigeration cycle medium, the refrigerant absorbs heat from the outer wall of the heat exchange pipe 1 and gasifies, and then the gaseous refrigerant carries the lubricating oil in the form of oil droplets along the climbing gap d to flow from bottom to top; and the refrigerant still exchanges heat with the heat exchange pipe 1 in the climbing gap d until the gaseous refrigerant is output from the second refrigerant interface 42, and the heat exchange process is completed.

[0067] The heat exchange unit provided in the embodiment is used as an evaporator, the refrigerant is full-liquid boiling in the refrigeration cavity, the heat exchange efficiency is high, and the oil return is convenient and reliable; and when used as a condenser, the heat exchange unit has the same function as the traditional shell-and-tube condenser.

[0068] Embodiment 3

[0069] The embodiment provides a heat exchange device, which comprises the heat exchange unit, the pressure sending unit and the pumping unit in the embodiment 2. The two ends of the pressure sending unit are respectively connected with the first refrigerant interface and the second refrigerant interface of the shell, and the pressure sending unit is suitable for flowing into or flowing out of the refrigeration cycle medium in the refrigeration cavity; the two ends of the pumping unit are respectively connected with the first coolant interface or the second coolant interface of the shell, and the pumping unit is suitable for flowing into or flowing out of the coolant medium in the heat exchange pipe. The pressure sending unit in the embodiment is a compressor and a refrigeration cycle circuit.

[0070] Obviously, the above embodiments are only examples for clearly illustrating, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A heat exchange unit, characterized by, The heat exchange unit comprises: a shell (4) having a refrigeration cavity adapted to flow a refrigeration circulating medium; a heat exchange mechanism having a heat exchange pipe (1) installed in the shell (4), the heat exchange pipe (1) being adapted to flow a cold carrier medium; a flow guiding mechanism adapted to be installed in cooperation with the heat exchange pipe (1) and comprising: a flow guiding member (2) extending along the length direction of the heat exchange pipe (1); the flow guiding member (2) having a flow guiding surface (21) arranged towards the outer side wall surface of the heat exchange pipe (1), the flow guiding surface (21) being adapted to form a climbing gap (d) with the outer side wall surface of the heat exchange pipe (1); the heat exchange unit is used in the following specific process: firstly, the refrigeration cavity stores a refrigeration circulating medium, i.e. a mixture of liquid refrigerant and lubricating oil, the bottom of the flow guiding member (2) is inserted below the liquid level of the refrigeration circulating medium, the refrigerant absorbs heat from the outer side wall surface of the heat exchange pipe (1) and vaporizes, and then the gaseous refrigerant carrying the lubricating oil in the form of oil droplets flows upwards along the climbing gap (d); and the gaseous refrigerant still exchanges heat with the heat exchange pipe (1) in the climbing gap (d) until the gaseous refrigerant is output from the second refrigerant interface (42), thereby completing the heat exchange process.

2. Heat exchange unit according to claim 1, characterized in that The cross section of the flow guiding surface (21) along the radial direction of the heat exchange pipe (1) is a closed surface.

3. The heat exchange unit according to claim 2, wherein the flow guiding member (2) is a tubular structure, the heat exchange pipe (1) can be arranged inside the tubular structure, and the inner wall surface of the tubular structure is the flow guiding surface (21); the closed surface is a square, a circle or an ellipse.

4. Heat exchange unit according to claim 3, characterized in that Further comprising a mounting member (3) provided with a plurality of mounting holes, and the tubular structure is fixedly installed in the mounting holes.

5. The heat exchange unit of claim 2, wherein The flow guiding member (2) is a columnar structure, a plurality of flow guiding holes (22) are arranged along the length direction of the columnar structure, the flow guiding holes (22) are through-hole structures, the heat exchange pipe (1) can be arranged inside the flow guiding holes (22), and the inner side wall surface of the flow guiding holes (22) is the flow guiding surface (21).

6. The heat exchange unit according to claim 1, wherein the flow guiding member (2) is a plurality of sheet structures adapted to be arranged along the peripheral wall surface of the heat exchange pipe (1), the flow guiding surface (21) is a circular arc surface or a plane, and the cross section of the flow guiding surface (21) along the radial direction of the heat exchange pipe (1) is a non-closed surface.

7. The heat exchange unit according to claim 1, wherein further comprising a first partition plate (5) and a second partition plate (6); the first partition plate (5) and the second partition plate (6) are installed in the shell, the first partition plate (5) and the shell (4) enclose a first cavity, the second partition plate (6) and the shell (4) enclose a second cavity, the two ends of the heat exchange pipe are connected to the first partition plate (5) and the second partition plate (6) to communicate the first cavity and the second cavity, and the first cavity and the second cavity are adapted to flow the cold carrier medium.

8. Heat exchange unit according to claim 7, characterized in that The first partition plate (5) and the second partition plate (6) are arranged in parallel.

9. Heat exchange unit according to claim 4, characterized in that The mounting member (3) of the flow guide mechanism is fixedly connected with the inner wall surface of the shell (4).

10. The heat exchange unit according to any one of claims 1-8, characterized in that, The heat exchange pipe (1) comprises a pipe body and a fin part, and the fin part is arranged in a protruding structure on the inner circumferential wall surface or the outer circumferential wall surface of the pipe body.

11. The heat exchange unit according to any one of claims 1-8, characterized in that, The heat exchange pipe (1) is a threaded pipe or a corrugated pipe, or a patterned pipe, or a pin pipe, or a sintered pipe, or a sandblasted pipe, or a concave point pipe.

12. A heat exchange apparatus, characterized by, The heat exchange unit is the heat exchange unit according to any one of claims 1-11.

13. The heat exchange device according to claim 12, characterized in that, Further comprising: A pressure sending unit, two ends of the pressure sending unit are respectively communicated with the first refrigerant interface (41) and the second refrigerant interface (42) of the shell (4), and the pressure sending unit is suitable for flowing into or flowing out of the refrigeration circulating medium in the refrigeration cavity; A pumping unit, two ends of the pumping unit are respectively communicated with the first cold carrier interface (43) or the second cold carrier interface (44) of the shell, and the pumping unit is suitable for flowing into or flowing out of the cold carrier medium to the heat exchange pipe.

Images