Limiting support for wire tube heat exchanger

Abstract

The utility model discloses a limiting support for a wire tube heat exchanger. The limiting support for the wire tube heat exchanger comprises teeth, and the teeth are inserted between tubes of the wire tube heat exchanger and used for fixing the distance between the tubes of the heat exchanger after bending. The limiting support is compact and exquisite in structure and convenient to install and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger brackets, in particular to a limiting bracket for a wire tube heat exchanger. Background Art

[0002] The wire tube heat exchanger is a new type of heat exchanger with the characteristics of compact structure, high heat transfer efficiency and fast response speed. However, the existing wire tube heat exchangers are all straight tube type, and the improvement of flow rate and heat transfer efficiency has reached a bottleneck. With the development of microelectronics technology, biomedical engineering and other fields, the requirements for wire tube heat exchangers are also increasing. At the same time, environmental protection and energy issues have also prompted people to seek more efficient ways to use energy.

[0003] Due to the special structure of the wire tube heat exchanger, ordinary brackets cannot be used to support the wire tube heat exchanger. How to support the wire tube heat exchanger and how to facilitate installation and fixation are also problems that need to be solved. Utility Model Content

[0004] In view of the problems in the background technology, the utility model proposes a limiting bracket for a wire tube heat exchanger, comprising: teeth, which are inserted between the tubes of the wire tube heat exchanger and are used to fix the distance between the tubes of the heat exchanger after bending.

[0005] Preferably, the limiting bracket comprises a plurality of groups of teeth, each group of teeth is spaced apart by a supporting sheet, and the supporting sheet is used to be inserted between the tubes of the wire tube heat exchanger.

[0006] Preferably, the limiting bracket is installed on the straight tube portion of the wire tube heat exchanger.

[0007] Preferably, the limiting bracket is installed near the bend portion of the wire tube heat exchanger.

[0008] Preferably, the wire and tube heat exchanger is a wire and tube heat exchanger based on the brachycephalic curve, comprising a straight tube portion and a curved tube portion, the straight tube portion and the curved tube portion are alternately connected, and the curved surface of the curved tube portion conforms to the brachycephalic curve.

[0009] Preferably, the curvature of the curved tube portion is 0.236-0.436, the length of the straight tube portion is 50 times or more of the outer diameter of the wire tube, and the length of the straight tube portion is 500 mm.

[0010] Preferably, the inlet of the wire tube heat exchanger is connected to the first header, and the refrigerant enters the wire tube heat exchanger from the inlet; and the outlet of the wire tube heat exchanger is connected to the second header, and the refrigerant enters the second header from the outlet.

[0011] Preferably, the straight pipe part and the curved pipe part are composed of a metal tube array formed by arranging a plurality of wire tubes.

[0012] Preferably, the metal tube array comprises a single row of metal wire tubes with the same hydraulic diameter, the hydraulic diameter of the metal wire tubes is 1 mm or less, and the wall thickness of the metal tube array is 0.1 mm to 0.6 mm.

[0013] Preferably, there are multiple straight pipe parts and curved pipe parts, the straight pipe parts and curved pipe parts are alternately connected, and the straight pipe parts are arranged in parallel.

[0014] The limiting bracket for the wire tube heat exchanger of the utility model has a compact and delicate structure, can well fix and protect the wire tube heat exchanger, is easy to install and maintain, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the present invention more easily understood, the present invention will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. These drawings only depict typical embodiments of the present invention and should not be considered as limiting the scope of protection of the present invention.

[0016] Figure 1 It is a structural schematic diagram of the first embodiment of the wire tube heat exchanger of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the second embodiment of the wire tube heat exchanger of the utility model.

[0018] Figure 3 It is a structural schematic diagram of a third embodiment of the wire tube heat exchanger of the utility model.

[0019] Figure 4 It is a structural schematic diagram of a fourth embodiment of the wire tube heat exchanger of the present utility model.

[0020] Figure 5 It is a structural schematic diagram of an implementation mode of a limit bracket of a wire tube heat exchanger of the utility model.

[0021] Figure 6 It is a structural schematic diagram of another embodiment of the limit bracket of the wire tube heat exchanger of the utility model.

[0022] Reference numerals

[0023] Vertical pipeline 1, curved pipeline 2, second header 3, brachistodes curve surface 4, metal tube array 5, first header 6, second vertical pipeline 7, second curved pipeline 8, limiting bracket 9, supporting part 91. DETAILED DESCRIPTION

[0024] The following describes the implementation mode of the present invention with reference to the accompanying drawings, so that those skilled in the art can better understand the present invention and implement it. However, the enumerated embodiments are not intended to limit the present invention. In the absence of conflict, the following embodiments and the technical features in the embodiments can be combined with each other, wherein the same components are represented by the same figure marks.

[0025] The wire tube heat exchanger of the utility model includes a straight tube part and a curved tube part, and the straight tube part and the curved tube part are alternately connected; wherein the curved surface of the curved tube part conforms to the fastest curve. The utility model is described below in conjunction with a specific implementation method. The fastest curve refers to a curve where a small ball rolls down between two points, and the small ball rolls down the fastest. The shape of the fastest curve is a curve, which starts with a nearly vertical acceleration, allowing the object to quickly pass through the horizontal displacement in the second half, and the average speed is the fastest. Preferably, the inlet of the wire tube heat exchanger is connected to the manifold, and the refrigerant enters the wire tube heat exchanger from the inlet; the outlet of the wire tube heat exchanger is connected to the manifold, and the refrigerant enters the second manifold from the outlet.

[0026] First embodiment

[0027] like Figure 1 As shown, the heat exchanger based on the fastest curve of the present invention comprises: a first vertical pipe 1, a first curved pipe 2, a second vertical pipe 7 and a second curved pipe 8 which are connected in sequence.

[0028] The curved pipe 2 has a brachistodes curve surface 4. Preferably, the second curved pipe 8 may also have a brachistodes curve surface.

[0029] Preferably, the brachistodes curve surface 4 of the first curved pipe 2 can be projected as a cycloid (ie, a cycloid), and the curvature can be designed to be 0.236-0.436.

[0030] Preferably, the length of the first vertical pipe 1 is more than 50 times the outer diameter of the wire tube, and in one embodiment may be 500 mm, to ensure that the refrigerant has a sufficient speed when flowing through the curved pipe portion.

[0031] Preferably, the wire tube heat exchanger of the utility model comprises a first header 6 and a second header 3. The first header 6 is provided with a refrigerant inlet, and the second header 3 is provided with a refrigerant outlet. The first header 6 is connected to the inlet of the first vertical pipe 1. The outlet of the second curved pipe 8 is connected to the second header 3.

[0032] In this way, the refrigerant obtains a higher velocity at the curved surface, thereby increasing the effective flow rate of the refrigerant.

[0033] In one embodiment, the curvature R of the curved portion is between 3 mm and 20 mm.

[0034] The utility model transforms the straight tubes used in the traditional heat exchange process into a strategy of using both straight tubes and curved tubes, and the degree of curvature of the curved surface meets the commonly used engineering standards, which is conducive to the efficient transmission of refrigerant in the channel, effectively avoids potential pipeline blockage problems, and improves the heat exchange efficiency of the air-conditioning system.

[0035] Second embodiment

[0036] Compared with the first embodiment, Figure 2 The heat exchanger of the second embodiment shown further includes: a third vertical pipe 9. The third vertical pipe 9 is connected to the second curved pipe 8. Accordingly, the first header 6 is connected to the inlet of the first vertical pipe 1. The outlet of the third vertical pipe 9 is connected to the second header 3.

[0037] Preferably, the length of the first vertical pipe 1 and the second vertical pipe 7 is 500 mm to ensure that the refrigerant has sufficient speed when flowing through the curved pipe section.

[0038] Specifically, the refrigerant enters from the refrigerant inlet and moves from top to bottom in the vertical pipe under the action of gravity; when the refrigerant flows through the curved pipe, the time required for the refrigerant to flow through is the shortest because the designed curved surface is a fastest curve with a curvature of 0.236 to 0.436. The channel heat exchanger based on the fastest curve has a higher heat exchange efficiency.

[0039] In this embodiment, the refrigerant obtains a higher speed at the curved surface, thereby reducing the transmission time of the refrigerant. Specifically, the refrigerant enters from the refrigerant inlet on the first header 6, first flows through the vertical pipe 1, and moves horizontally downward due to gravity acceleration; flows through the interface between the vertical pipe 1 and the curved pipe 2, and is disturbed by multiple external forces such as gravity and wall pressure, and moves along the curved surface part 4 in a cycloidal path to the next vertical pipe. Compared with traditional straight wire tubes, wire tubes based on the brachistochrone curve have less transmission time.

[0040] exist Figure 2 The wire tube heat exchanger shown in the figure has a three-row two-bend structure. After testing, its heat exchange performance is shown in Table 1, and it can be seen that the heat exchange performance is very good.

[0041]

[0042]

[0043] Third embodiment

[0044] Compared with the second embodiment, Figure 3In the third embodiment shown, the heat exchanger is a wire tube heat exchanger, and the first vertical pipe 1, the first curved pipe 2, the second vertical pipe 7, the second curved pipe 8 and the third vertical pipe 9 are all composed of a metal tube 5 formed by arranging a plurality of wire tubes. The metal tube 5 is a microtube, the hydraulic diameter of the microtube is between 0.1-2 mm, and there is no fin on the outer surface of the metal wire tube. Further, the wall thickness of the metal tube 5 is between 0.1 mm and 0.6 mm, so as to be able to withstand the high pressure requirements of the refrigerant system. Furthermore, the metal tube 5 is resistant to high pressure, has a large tolerance pressure and extremely high heat exchange efficiency.

[0045] The utility model transforms the micro straight tubes used in the traditional heat exchange process into a strategy of using micro straight tubes and curved tubes together, and the degree of curvature of the curved surface meets the commonly used engineering standards, which is conducive to the efficient transmission of the refrigerant in the wire tube, effectively avoiding potential pipeline blockage problems, and improving the heat exchange efficiency of the air-conditioning system.

[0046] Specifically, when the refrigerant flows in the wire tube, it enters from the refrigerant inlet and moves from top to bottom in the vertical pipe under the action of gravity; when the refrigerant flows through the curved pipe, the time required for the refrigerant to flow through is the shortest because the designed curved surface is a fastest curve with a curvature of 0.236 to 0.436. The wire tube heat exchanger based on the fastest curve has a higher heat exchange efficiency.

[0047] In a preferred embodiment, the wire tube heat exchanger is made of stainless steel, the outer diameter of the tube is 1.1 mm, the wall thickness of the tube is 0.1 mm, the wire tube heat exchanger is 200 mm wide and 500 mm high.

[0048] In a preferred embodiment, the wire tube heat exchanger is resistant to high pressure and corrosion. The maximum bursting pressure of the prior art is 140 kg, and the bursting pressure of the wire tube heat exchanger of the utility model is increased to 400 kg.

[0049] The wire tube heat exchanger of the utility model can greatly increase the effective flow rate of the refrigerant (see Table 2 - flow rate comparison table of a straight-tube wire tube radiator and the wire tube radiator of the utility model under different pressures).

[0050] Table 2

[0051]

[0052] It can be seen that the 8-bend pipe has a 13.76% smaller flow rate at low flow, and as the pressure increases to 0.6 MPa, the flow rate gradually increases to 1.18%. The 2-bend pipe has a 0.22% smaller flow rate at low flow, and as the pressure increases to 0.5 MPa, the flow rate of the 2-bend pipe is 5.8% larger. And it gradually increases to 16.1% when the pressure increases to 0.6 MPa.

[0053] Fourth embodiment

[0054] like Figure 4-5 As shown, the heat exchanger of the utility model also includes a limit bracket. The limit bracket is particularly suitable for the heat exchanger of the third embodiment. The limit bracket 9 has teeth, which are used to fix the distance between the heat exchanger tubes after bending, thereby improving the exchange efficiency on both sides. The limit bracket is preferably installed on the straight tube part of the wire tube heat exchanger, close to the curved tube part: the connection between the first vertical pipe 1 and the first curved pipe 2, and the connection between the second vertical pipe 7 and the second curved pipe 8. The elbow and the first header 6 and the second first header 3 can be spaced a certain distance apart. The material of the limit bracket is not limited, and can be a metal material or a non-metallic material. The limit bracket can clamp two, three or more straighter pipe parts as needed to play a fixing role.

[0055] Figure 5-6 Two embodiments of the position limiting bracket are shown. The position limiting bracket 9 comprises a plurality of groups of teeth, and the plurality of groups of teeth are separated by support sheets 91 , and the number of teeth in each group of teeth may be different.

[0056] The embodiments described above are only preferred specific implementations of the present invention. The phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments" used in this specification may refer to one or more of the same or different embodiments according to the present disclosure. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A limiting bracket for a wire tube heat exchanger, characterized in that: include: Multiple groups of teeth are inserted between the tubes of the wire tube heat exchanger to fix the spacing between the tubes of the heat exchanger after bending; a support sheet is provided between each group of teeth to be inserted between the tubes of the wire tube heat exchanger.

2. The limiting bracket according to claim 1, characterized in that: The limiting bracket is installed on the straight tube part of the wire tube heat exchanger.

3. The limiting bracket according to claim 2, characterized in that: The limiting bracket is installed at the part of the wire tube heat exchanger close to the bent pipe.

4. The limiting bracket according to claim 1, characterized in that: The wire tube heat exchanger is a wire tube heat exchanger based on the brachycephalic curve, comprising a straight tube portion and a curved tube portion, the straight tube portion and the curved tube portion are alternately connected, and the curved surface of the curved tube portion conforms to the brachycephalic curve.

5. The limiting bracket according to claim 4, characterized in that: The curvature of the curved pipe part is 0.236-0.436, the length of the straight pipe part is 50 times or more of the outer diameter of the wire tube, and the length of the straight pipe part is 500 mm.

6. The limiting bracket according to claim 5, characterized in that: The inlet of the wire tube heat exchanger is connected to the first header (6), and the refrigerant enters the wire tube heat exchanger from the inlet; and The outlet of the wire tube heat exchanger is connected to the second header (3), and the refrigerant enters the second header (3) from the outlet.

7. The limiting bracket according to claim 6, characterized in that: The straight pipe part and the curved pipe part are composed of a metal tube array (5) formed by arranging a plurality of wire tubes.

8. The limiting bracket according to claim 7, characterized in that: The metal tube array (5) comprises a single row of metal wire tubes with the same hydraulic diameter, the hydraulic diameter of the metal wire tubes is 1 mm or less, and the wall thickness of the metal tube array (5) is 0.1 mm to 0.6 mm.

9. The limiting bracket according to claim 8, characterized in that: There are multiple straight pipe parts and curved pipe parts, the straight pipe parts and the curved pipe parts are connected alternately, and the straight pipe parts are arranged in parallel.

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