Double-layer sleeve type heat exchange structure and heat exchanger thereof
By adopting a double-layer casing structure and spiral convex wall and convex strip design in the casing heat exchanger, the problem of low heat exchange efficiency caused by the small surface area of the casing heat exchanger is solved, and more efficient heat exchange is achieved and heat utilization.
Patent Information
- Application Number
- CN202420918646.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The surface area of the casing heat exchanger is relatively small, resulting in a low heat exchange efficiency.
Adopt a double-layer casing heat exchange structure, including the first steel pipe, the first copper pipe, the second steel pipe and the second copper pipe from the outside to the inside, forming a multi-layer heat exchange design, increasing the heat exchange surface area, and in the copper pipe The outer and inner walls are provided with spiral convex walls and convex strips to increase the heat exchange area.
It significantly improves the heat exchange efficiency, ensures that water and refrigerant can fully complete heat exchange, avoid heat dissipation into the air, and improves the heat exchange ability of the heat exchanger.
Smart Images
Figure CN222165789U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchangers, in particular to a double-layer sleeve heat exchange structure and a heat exchanger thereof. Background Art
[0002] With the continuous updating of technology and the continuous improvement of people's quality of life, people have higher and higher requirements for heating units. At present, the water side heat exchanger of air source heat pump heating models generally uses a shell and tube heat exchanger. The shell and tube heat exchanger generally uses an outer steel pipe to cover the inner copper pipe. Water flows through the inside of the copper pipe, and refrigerant flows between the copper pipe and the steel pipe, and heat is exchanged through the copper pipe.
[0003] However, the surface area of the shell and tube heat exchanger is smaller than that of other heat exchangers, which makes the heat exchange efficiency relatively low. Summary of the invention
[0004] In order to solve the above problems, the first purpose of the utility model is to provide a double-layer shell and tube heat exchange structure, which adopts a multi-layer heat exchange structural design. Water and refrigerant can fully complete heat exchange. Under the same volume, based on the design of inner and outer layer heat exchange, the heat exchange capacity of the heat exchanger is improved; the second purpose of the utility model is to provide a heat exchanger having the above-mentioned double-layer shell and tube heat exchange structure.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0006] A double-layer shell-and-tube heat exchange structure comprises a tube body, characterized in that: the tube body is arranged from the outside to the inside with a first steel tube, a first copper tube, a second steel tube and a second copper tube, a first refrigerant layer is formed between the first steel tube and the first copper tube, a first water-permeable layer is formed between the first copper tube and the second steel tube, a second refrigerant layer is formed between the second steel tube and the second copper tube, and a second water-permeable layer is formed on the inner side of the second copper tube.
[0007] Preferably, the inner walls of the first copper tube and the second copper tube protrude outward along the axial direction of the tube body to form a plurality of convex walls, wave crests are formed on the convex walls, and wave troughs are formed between adjacent convex walls.
[0008] Preferably, the first copper tube and the second copper tube are threaded tubes, and a plurality of convex wall spirals are formed on the outer walls of the first copper tube and the second copper tube.
[0009] Preferably, a plurality of convex walls are regularly formed on the outer walls of the first copper tube and the second copper tube in a circumferential direction.
[0010] Preferably, the inner walls of the first copper tube and the second copper tube are provided with a plurality of convex strips extending inwardly along the axial direction of the tube body, and arc grooves corresponding to the convex walls are formed between adjacent convex strips; and the plurality of convex strips are spirally formed on the inner walls of the first copper tube and the second copper tube.
[0011] Preferably, a plurality of convex strips are regularly formed on the inner walls of the first copper tube and the second copper tube in a circumferential direction.
[0012] A heat exchanger comprises any one of the double-layer shell-and-tube heat exchange structures described above.
[0013] The utility model adopts the above technical solution. The double-layer shell-and-tube heat exchange structure adopts a multi-layer heat exchange tube inner and outer connection. Based on the design of heat exchange between the inner and outer layers, the heat exchange capacity of the heat exchanger is improved. Specifically, the first water-passing layer can exchange heat with the first refrigerant layer and the second refrigerant layer on both sides at the same time, and the second refrigerant layer can exchange heat with the first water-passing layer and the first water-passing layer on both sides at the same time, which increases the heat exchange surface area and significantly improves the heat exchange efficiency; and the spiral convex wall formed on the outer wall of the copper tube can further increase the heat exchange surface area between the refrigerant and the water. At the same time, the spiral convex strips formed on the inner wall of the copper tube form a spiral arc groove corresponding to the convex wall, which further increases the heat exchange surface area between the refrigerant and the water, so that the water and the refrigerant can fully complete the heat exchange, greatly improving the heat exchange capacity of the heat exchanger, and avoiding the conventional shell-and-tube heat exchanger. Excess heat is dissipated into the air, causing heat loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 Schematic diagram of the three-dimensional structure of the heat exchanger.
[0015] Figure 2 Schematic diagram of the cross-sectional structure of the double-layer casing.
[0016] Figure 3 Schematic diagram of the cross-sectional structure of a copper tube. DETAILED DESCRIPTION
[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0019] 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 one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.
[0020] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0021] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example
[0022] like Figure 2~3 A double-layer shell-and-tube heat exchange structure shown includes a tube body, wherein a first steel tube 1, a first copper tube 2, a second steel tube 3 and a second copper tube 4 are arranged from the outside to the inside of the tube body, a first refrigerant layer 5 is formed between the first steel tube 1 and the first copper tube 2, a first water-permeable layer 6 is formed between the first copper tube 2 and the second steel tube 3, a second refrigerant layer 7 is formed between the second steel tube 3 and the second copper tube 4, and a second water-permeable layer 8 is formed on the inner side of the second copper tube 4.
[0023] In the above technical solution, the first water-permeable layer can exchange heat with the first refrigerant layer and the second refrigerant layer on both sides at the same time, and the second refrigerant layer can exchange heat with the first water-permeable layer and the first water-permeable layer on both sides at the same time, thereby increasing the heat exchange surface area and significantly improving the heat exchange efficiency.
[0024] Furthermore, the inner walls of the first copper tube 2 and the second copper tube 4 protrude outward along the axial direction of the tube body to form a plurality of convex walls 9, and wave crests are formed on the convex walls 9, and wave troughs are formed between adjacent convex walls 9. In this technical solution, the formation of wave crests on the convex walls and wave troughs between adjacent convex walls 9 can increase the surface area of the copper tube, thereby increasing the heat exchange area between water and refrigerant, and improving the heat exchange capacity.
[0025] Furthermore, the first copper tube 2 and the second copper tube 4 are threaded tubes, and a plurality of convex walls 9 are spirally formed on the outer walls of the first copper tube 2 and the second copper tube 4. In this technical solution, a plurality of convex walls 9 are spirally formed on the outer walls of the first copper tube 2 and the second copper tube 4 to further increase the surface area of the copper tubes, thereby increasing the heat exchange area between water and the refrigerant and improving the heat exchange capacity.
[0026] Furthermore, a plurality of convex walls 9 are regularly formed on the outer walls of the first copper tube 2 and the second copper tube 4. In this technical solution, the plurality of convex walls 9 are regularly arranged circumferentially so that the heat exchange capacity at each convex wall is relatively even, making the overall heat exchange more sufficient.
[0027] Furthermore, the inner walls of the first copper tube 2 and the second copper tube 4 are provided with a plurality of convex strips 10 extending inwardly along the axial direction of the tube body, and arc grooves 11 corresponding to the convex wall 9 are formed between adjacent convex strips 10; the plurality of convex strips 10 are spirally formed on the inner walls of the first copper tube 2 and the second copper tube 4. In this technical solution, the plurality of convex strips 10 are spirally formed on the inner walls of the first copper tube 2 and the second copper tube 4 so that the arc grooves 11 are arranged in a spiral shape, thereby increasing the surface area of the inner wall, thereby increasing the heat exchange area between water and the refrigerant, and improving the heat exchange capacity.
[0028] Furthermore, a plurality of convex strips 10 are regularly formed on the inner wall of the first copper tube 2 and the second copper tube 4. In this technical solution, a plurality of convex strips 10 are regularly arranged circumferentially, so that the heat exchange capacity at each arc groove is relatively even, making the overall heat exchange more sufficient. Example
[0029] like Figure 1 A heat exchanger is shown, including a double-layer shell and tube heat exchange structure in the first embodiment.
[0030] In this specific embodiment, in order to address the problem that the surface area of the existing shell-and-tube heat exchanger is smaller than that of other heat exchangers and the heat exchange efficiency is relatively low, the above scheme adopts a multi-layer heat exchange tube that is connected inside and outside and is gathered at the head and tail to merge into one path. Based on the design of heat exchange between the inner and outer layers, the heat exchange capacity of the heat exchanger is improved.
[0031] Specifically, the first water-permeable layer can exchange heat with the first refrigerant layer and the second refrigerant layer on both sides at the same time, and the second refrigerant layer can exchange heat with the first water-permeable layer and the first water-permeable layer on both sides at the same time, thereby increasing the heat exchange surface area and significantly improving the heat exchange efficiency; and, a spiral convex wall is formed on the outer wall of the copper tube, which can further increase the heat exchange surface area between the refrigerant and water. At the same time, the spiral convex strips are formed on the inner wall of the copper tube to form a spiral arc groove corresponding to the convex wall, thereby further increasing the heat exchange surface area between the refrigerant and water, so that water and refrigerant can fully complete heat exchange, greatly improving the heat exchange capacity of the heat exchanger, and avoiding the conventional shell-and-tube heat exchanger from having excess heat dissipated into the air, causing heat loss.
[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.
Claims
1. A double-layer tube-in-tube heat exchange structure, comprising a tube body, characterized in that: The tube body comprises a first steel tube (1), a first copper tube (2), a second steel tube (3) and a second copper tube (4) arranged from the outside to the inside; a first refrigerant layer (5) is formed between the first steel tube (1) and the first copper tube (2); a first water permeable layer (6) is formed between the first copper tube (2) and the second steel tube (3); a second refrigerant layer (7) is formed between the second steel tube (3) and the second copper tube (4); and a second water permeable layer (8) is formed on the inner side of the second copper tube (4).
2. A double-layer tube-in-tube heat exchange structure according to claim 1, characterized in that: The inner walls of the first copper tube (2) and the second copper tube (4) protrude outwards along the axial direction of the tube body to form a plurality of convex walls (9), wave crests are formed on the convex walls (9), and wave troughs are formed between adjacent convex walls (9).
3. A double-layer tube-in-tube heat exchange structure according to claim 2, characterized in that: The first copper tube (2) and the second copper tube (4) are threaded tubes, and a plurality of convex walls (9) are spirally formed on the outer walls of the first copper tube (2) and the second copper tube (4).
4. A double-layer tube-in-tube heat exchange structure according to claim 3, characterized in that: A plurality of convex walls (9) are regularly formed on the outer walls of the first copper tube (2) and the second copper tube (4) in a circumferential direction.
5. The double-layer tube-in-tube heat exchange structure according to claim 2, characterized in that: The inner walls of the first copper tube (2) and the second copper tube (4) are provided with a plurality of convex strips (10) extending inwardly along the axial direction of the tube body, and arc-shaped grooves (11) corresponding to the convex walls (9) are formed between adjacent convex strips (10); the plurality of convex strips (10) are spirally formed on the inner walls of the first copper tube (2) and the second copper tube (4).
6. A double-layer tube-in-tube heat exchange structure according to claim 5, characterized in that: A plurality of convex strips (10) are regularly formed in the circumferential direction on the inner walls of the first copper tube (2) and the second copper tube (4).
7. A heat exchanger, characterized in that: It comprises a double-layer shell-and-tube heat exchange structure as described in any one of claims 1 to 6.