Air energy heat pump buffer water tank

Abstract

The application discloses an air energy heat pump buffer water tank and belongs to the technical field of air energy heat pump equipment. The air energy heat pump buffer water tank comprises an inner container body, a heat preservation layer and an outer shell, the heat preservation layer is located between the inner container body and the outer shell, the inner container body is formed by glass fiber reinforced polypropylene injection molding, a plurality of first reinforcing ribs are arranged on the outer surface of the inner container body in the axial direction, a plurality of second reinforcing ribs are arranged on the outer surface of the inner container body in the circumferential direction, the top and the bottom of the outer surface of the inner container body are each provided with a plurality of third reinforcing ribs, the top and the bottom of the inner surface of the inner container body are each provided with a plurality of fourth reinforcing ribs, the inner container body comprises an upper tank body and a lower tank body, the upper tank body and the lower tank body are welded and connected, and a plurality of triangular ribs are arranged at the connecting position of the upper tank body and the lower tank body. The lightweight pressure-bearing structure of the inner container is improved, so that the water tank is light in weight, good in corrosion resistance, high in pressure resistance, and the production cost is greatly reduced.

Description

Technical Field

[0001] This application relates to a buffer water tank for an air source heat pump, belonging to the technical field of air source heat pump equipment. Background Technology

[0002] With the advancement of national clean heating and smog control efforts, the air source heat pump heating industry has developed rapidly. An air source heat pump is an energy-saving device that utilizes high-grade energy to transfer heat from a low-grade heat source (air) to a high-grade heat source. It is a type of heat pump that can convert low-grade heat energy (such as the heat contained in air, soil, and water) into directly usable high-grade heat energy, thereby saving some high-grade heat energy (such as coal, natural gas, oil, and electricity). Heat pump systems can use buffer tanks to improve system efficiency and stability. A buffer tank is typically a large-capacity water storage device used to store the heat energy generated by the heat pump system.

[0003] Currently, most air source heat pump buffer water tanks on the market use stainless steel / metal inner tanks, which are heavy, prone to corrosion, and costly. Metal inner tanks, in particular, rely on increased thickness to improve pressure resistance, resulting in bulky dimensions. Furthermore, their manufacturing involves multiple processes (such as cutting, welding, and grinding), leading to low efficiency and the risk of leakage at welded joints. Therefore, this paper researches and improves upon existing structures and shortcomings to provide an air source heat pump buffer water tank with greater practical value. Utility Model Content

[0004] To address the aforementioned issues, this application proposes an air-source heat pump buffer water tank, with particular improvements made to the lightweight pressure-bearing structure of the inner tank, resulting in a lighter water tank with better corrosion resistance, higher pressure resistance, and significantly reduced production costs.

[0005] The technical solution of this utility model is as follows:

[0006] An air-source heat pump buffer water tank includes an inner tank body, an insulation layer, and an outer shell. The insulation layer is located between the inner tank body and the outer shell. The inner tank body is injection molded from glass fiber reinforced polypropylene. A plurality of primary reinforcing ribs are axially arranged on the outer surface of the inner tank body. A plurality of secondary reinforcing ribs are circumferentially arranged on the outer surface of the inner tank body. A plurality of tertiary reinforcing ribs are arranged at the top and bottom of the outer surface of the inner tank body. A plurality of quaternary reinforcing ribs are arranged at the top and bottom of the inner surface of the inner tank body. The inner tank body includes an upper chamber and a lower chamber, which are welded together. A plurality of triangular ribs are arranged at the connection between the upper chamber and the lower chamber.

[0007] Optionally, both the upper and lower housings are provided with embedded inserts on their outer surfaces, and the upper housing and the embedded inserts, as well as the lower housing and the embedded inserts, are integrally injection molded.

[0008] Optionally, the inner liner body and the outer shell are connected by a snap-fit ​​embedded part.

[0009] Optionally, the insulation layer is a polyurethane foam layer, which fills the space between the inner liner body and the outer shell, and forms a mechanical interlocking structure between the polyurethane foam layer and the inner liner body.

[0010] Optionally, the welding edges of the upper and lower housings extend outward along the outer surface of the inner liner body.

[0011] Optionally, the width of the welded edge is 8-12mm and the thickness is 4-8mm.

[0012] Optionally, the primary reinforcing rib is wavy, with a height of 8-10 mm, a thickness of 3-5 mm, and a spacing of 60-70 mm between adjacent primary reinforcing ribs.

[0013] Optionally, the secondary reinforcing rib is trapezoidal, with a height of 8-10mm, a thickness of 3-5mm, and a spacing of 60-70mm between adjacent secondary reinforcing ribs.

[0014] Optionally, the thickness of the triangular rib is 3-5mm, and the spacing between adjacent triangular ribs is 12-18mm.

[0015] Optionally, the thickness of the inner liner body is 4-5 mm.

[0016] The beneficial effects that this application may produce include, but are not limited to:

[0017] The air-source heat pump buffer water tank provided in this application has an inner tank body, an insulation layer, and an outer shell. It reduces the heat exchange efficiency between the hot water inside the tank and the external environment, reduces heat loss, thereby improving the energy efficiency ratio of the heat pump system and reducing energy consumption. The inner tank body is injection molded from glass fiber reinforced polypropylene, reducing splicing processes, reducing the risk of leakage, and improving production efficiency. Compared with a metal inner tank, it is significantly lighter and resistant to acid and alkali corrosion. By setting primary, secondary, tertiary, and quaternary reinforcing ribs and triangular ribs, the inner tank body is reinforced in multiple dimensions in the axial, circumferential, top, and bottom directions, constructing a mesh-like impact-resistant structure to ensure the stability of the insulation layer performance and reduce heat loss. The injection molding process improves production efficiency and reliability, making it particularly suitable for scenarios in heat pump systems that require frequent water filling and discharging and long-term alternating loads, significantly reducing the incidence of failures such as leakage and deformation. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the air source heat pump buffer water tank involved in the embodiments of this application;

[0020] Figure 2 This is a cross-sectional schematic diagram of the air source heat pump buffer water tank involved in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the inner liner body involved in the embodiments of this application;

[0022] Figure 4 This is a cross-sectional schematic diagram of the inner liner body involved in the embodiments of this application;

[0023] List of components and reference numerals:

[0024] 1. Inner liner body; 2. Insulation layer; 3. Outer shell; 4. Primary reinforcing rib; 5. Secondary reinforcing rib; 6. Tertiary reinforcing rib; 7. Quaternary reinforcing rib; 8. Triangular rib; 9. Upper box body; 10. Lower box body; 11. Embedded insert; 12. Snap-on embedded part; 13. Welded edge. Detailed Implementation

[0025] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0026] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0028] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0032] Reference Figure 1-4 This application describes an air-source heat pump buffer water tank.

[0033] The air-source heat pump buffer water tank according to this embodiment includes an inner tank body 1, an insulation layer 2, and an outer shell 3. The insulation layer 2 is located between the inner tank body 1 and the outer shell 3, reducing the heat exchange efficiency between the hot water inside the tank and the external environment, reducing heat loss, thereby improving the energy efficiency ratio of the heat pump system and reducing energy consumption. The inner tank body 1 is injection molded from glass fiber reinforced polypropylene, reducing splicing processes, reducing leakage risks, and improving production efficiency. Compared with a metal inner tank, it is significantly lighter and resistant to acid and alkali corrosion. Several primary reinforcing ribs 4 are axially arranged on the outer surface of the inner tank body 1. The inner liner body 1 has several secondary reinforcing ribs arranged circumferentially on its outer surface to resist radial expansion pressure. The top and bottom of the outer surface of the inner liner body 1 are provided with several tertiary reinforcing ribs 6 to improve local pressure bearing capacity. The top and bottom of the inner surface of the inner liner body 1 are provided with several quaternary reinforcing ribs 7 to increase the strength of the inner liner body 1. The inner liner body 1 includes an upper box 9 and a lower box 10, which are welded together. Several triangular ribs 8 are provided at the connection between the upper box 9 and the lower box 10 to increase the strength of the weld surface.

[0034] In this embodiment, the glass fiber content in the glass fiber reinforced polypropylene is 25-30%, and the temperature resistance range of the glass fiber reinforced polypropylene is -30℃ to 110℃, breaking through the temperature resistance limitations of traditional plastics.

[0035] In this embodiment, the density of the three-level reinforcing rib 6 is increased by 50%, and the local compressive strength reaches 1.5MPa.

[0036] In this embodiment, the upper housing 9 and the lower housing 10 can be welded together by infrared hot melt welding, hot plate hot melt welding, ultrasonic welding, vibration friction welding, etc.; preferably, infrared hot melt welding or hot plate hot melt welding is used, the welding temperature is 220-240℃, the penetration depth is ≥2mm, forming a seamless integrated structure, which does not require the assistance of sealant as in traditional metal welding.

[0037] This manual does not impose any restrictions on the material of the outer casing 3; appropriate materials can be selected according to actual needs.

[0038] As one implementation, both the upper housing 9 and the lower housing 10 are provided with embedded inserts 11 on their outer surfaces. The embedded inserts 11 are located at the water pipe interface to increase the connection strength. The upper housing 9 and the embedded inserts 11, as well as the lower housing 10 and the embedded inserts 11, are integrally injection molded to reduce the risk of corrosion and extend the service life.

[0039] In one implementation, the inner liner body 1 and the outer shell 3 are connected by a snap-fit ​​embedded part 12, which facilitates disassembly and maintenance.

[0040] In one implementation, the insulation layer 2 is a polyurethane foam layer. The polyurethane foam layer is filled between the inner liner body 1 and the outer shell 3, and a mechanical interlocking structure is formed between the polyurethane foam layer and the inner liner body 1 to improve the overall resistance to deformation.

[0041] As one implementation, the welding edge 13 of the upper box 9 and the lower box 10 extends outward along the outer surface of the inner liner body 1 to avoid cracking caused by stress concentration.

[0042] As one implementation method, the width of the welding edge 13 is 8-12mm and the thickness is 4-8mm; preferably, the width of the welding edge 13 is 10mm and the thickness is 6mm, which optimizes the welding quality and forming efficiency, reduces the risk of weld cracking, and improves the load resistance and impact resistance.

[0043] In one embodiment, the primary reinforcing rib 4 is wavy, with a height of 8-10 mm, a thickness of 3-5 mm, and a spacing of 60-70 mm between adjacent primary reinforcing ribs 4; preferably, the primary reinforcing rib 4 has a height of 9 mm, a thickness of 4 mm, and a spacing of 65 mm between adjacent primary reinforcing ribs 4, so that the stress is more evenly distributed and the bending and impact resistance is enhanced.

[0044] In one implementation, the secondary reinforcing rib is trapezoidal, with a height of 8-10mm and a thickness of 3-5mm, and a spacing of 60-70mm between adjacent secondary reinforcing ribs 5; preferably, the secondary reinforcing rib has a height of 9mm, a thickness of 4mm, and a spacing of 65mm between adjacent secondary reinforcing ribs 5, which can efficiently disperse circumferential stress and improve resistance to internal pressure and deformation.

[0045] In one implementation, the thickness of the triangular rib 8 is 3-5mm, and the spacing between adjacent triangular ribs 8 is 12-18mm; preferably, the thickness of the triangular rib 8 is 4mm, and the spacing between adjacent triangular ribs 8 is 15mm, which reduces stress concentration and improves crack resistance, and is particularly suitable for air source heat pump buffer water tanks with high requirements for pressure resistance and vibration environment.

[0046] As one implementation method, the thickness of the inner liner body 1 is 4-5mm; preferably 5mm. This reduces the overall weight of the water tank while effectively absorbing external impact energy, reducing the risk of inner liner breakage due to collision, and avoiding the problems of excessive rigidity and increased brittleness caused by excessive thickness.

[0047] To demonstrate the advantages of the air-source heat pump buffer water tank of this utility model, Table 1 below compares the differences between the traditional metal inner tank and the inner tank body 1 of this utility model from multiple dimensions.

[0048] Table 1

[0049]

[0050]

[0051] As can be seen from Table 1, the air-source heat pump buffer water tank of this utility model, after improving the lightweight pressure-bearing structure of the inner tank body 1, significantly reduces the weight and production cost of the water tank, and makes it more pressure-resistant and corrosion-resistant.

[0052] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0053] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A buffer water tank for an air-source heat pump, characterized in that, The device includes an inner liner body, an insulation layer, and an outer shell. The insulation layer is located between the inner liner body and the outer shell. The inner liner body is injection molded from glass fiber reinforced polypropylene. The outer surface of the inner liner body has several primary reinforcing ribs arranged axially, several secondary reinforcing ribs arranged circumferentially, several tertiary reinforcing ribs arranged at the top and bottom of the outer surface of the inner liner body, and several quaternary reinforcing ribs arranged at the top and bottom of the inner surface of the inner liner body. The inner liner body includes an upper box and a lower box, which are welded together. Several triangular ribs are provided at the connection between the upper box and the lower box.

2. The air-source heat pump buffer water tank according to claim 1, characterized in that, Both the upper and lower housings have embedded inserts on their outer surfaces, and the upper housing and the embedded inserts, as well as the lower housing and the embedded inserts, are integrally injection molded.

3. The air-source heat pump buffer water tank according to claim 1, characterized in that, The inner liner body and the outer shell are connected by a snap-fit ​​embedded part.

4. The air-source heat pump buffer water tank according to claim 1, characterized in that, The insulation layer is a polyurethane foam layer, which fills the space between the inner liner and the outer shell, and forms a mechanical interlocking structure between the polyurethane foam layer and the inner liner.

5. The air-source heat pump buffer water tank according to claim 1, characterized in that, The welding edges of the upper and lower boxes extend outward along the outer surface of the inner liner body.

6. The air-source heat pump buffer water tank according to claim 5, characterized in that, The width of the welded edge is 8-12mm, and the thickness is 4-8mm.

7. The air-source heat pump buffer water tank according to claim 1, characterized in that, The primary reinforcing rib is wavy, with a height of 8-10mm, a thickness of 3-5mm, and a spacing of 60-70mm between adjacent primary reinforcing ribs.

8. The air-source heat pump buffer water tank according to claim 1, characterized in that, The secondary reinforcing ribs are trapezoidal, with a height of 8-10mm, a thickness of 3-5mm, and a spacing of 60-70mm between adjacent secondary reinforcing ribs.

9. The air-source heat pump buffer water tank according to claim 1, characterized in that, The thickness of the triangular rib is 3-5mm, and the spacing between adjacent triangular ribs is 12-18mm.

10. The air-source heat pump buffer water tank according to claim 1, characterized in that, The thickness of the inner liner body is 4-5mm.

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