Heat pump underframe structure

Abstract

The utility model provides a heat pump chassis structure which comprises an upper bearing component used for supporting a compressor and a motor. The horizontal oil separator supporting component and the upper bearing component are arranged in a separated mode, a containing space matched with the oil separator barrel is formed between the horizontal oil separator supporting component and the upper bearing component, the oil separator barrel is only in positioning connection with the horizontal oil separator supporting component, and the oil separator barrel is not in contact with the upper bearing component. By means of the split force bearing framework, the technical bottlenecks of an existing heat pump unit underframe in the aspects of vibration control, structural stability and space utilization rate are systematically solved, and an innovative solution is provided for engineering application of a high-reliability and low-cost heat pump system.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat pump equipment, and specifically relates to a heat pump base frame structure. Background Technology

[0002] Heat pump units are widely used in heating, cooling, and hot water production. Their core components typically include a compressor, motor, and oil separator. Currently, most heat pump unit chassis structures directly fix the compressor and motor base to the top of the oil separator cylinder, with the oil separator support integrated with the upper load-bearing components. While this layout simplifies the assembly process, it has the following technical drawbacks in actual operation:

[0003] 1. Vibration transmission leads to fatigue failure; the vibration generated by the compressor and motor during operation is directly transmitted to the oil separator cylinder through the upper load-bearing components. Long-term vibration load can easily cause fatigue cracks in the weld seams of the oil separator cylinder, deformation of the shell, and even damage to the internal filter element or failure of the flange seal, thereby causing refrigerant or lubricating oil leakage.

[0004] 2. Uneven stress distribution in the oil separator cylinder; As the oil separator cylinder bears the weight of the equipment and vibration loads, its wall thickness and material strength design are constrained, which not only affects the lightweighting of the cylinder but also increases manufacturing costs; In addition, the cylinder is subjected to a single stress method, making it difficult to achieve uniform stress distribution.

[0005] 3. The overall hoisting center of gravity is too high; the existing base frame structure has the upper load-bearing components and oil separator designed to be coaxial or overlapped, resulting in a relatively high overall center of gravity for the unit. This makes it prone to tipping over during hoisting and also results in poor on-site installation stability, increasing the difficulty of installation and safety hazards.

[0006] 4. Conflict between structural rigidity and space utilization: In order to meet the strength requirements, traditional integrated base frames usually use heavy-section steel or multiple longitudinal and transverse stiffeners, resulting in large component size and low space utilization. At the same time, holes need to be drilled in the support components to arrange pipelines, and the stress concentration can easily cause local failure.

[0007] 5. Inconvenient maintenance and modification; due to the high degree of integration between the upper load-bearing components and the oil separator support, the entire unit needs to be moved during disassembly and debugging, resulting in high maintenance costs and difficulty in adapting to different models or specifications of oil separators.

[0008] Based on the above shortcomings, there is an urgent need for a new heat pump frame structure that can isolate the oil separator cylinder from the upper load components, reduce the stress on the cylinder and extend its service life, while also optimizing the overall structural rigidity, lowering the unit's center of gravity, improving space utilization and ease of maintenance. Utility Model Content

[0009] In view of the above-mentioned technical problems existing in the prior art, this utility model proposes a heat pump base frame structure to solve the above-mentioned technical problems.

[0010] This utility model proposes a heat pump base frame structure, including

[0011] The upper load-bearing structure supports the compressor and motor;

[0012] The horizontal oil separator support component is separately installed from the upper load-bearing component, forming a space between them to accommodate the oil separator cylinder. The oil separator cylinder is only positioned and connected to the horizontal oil separator support component, and there is no contact between the oil separator cylinder and the upper load-bearing component. By separating the upper load-bearing component from the horizontal oil separator support component and ensuring that the oil separator cylinder is only positioned and connected to the support component, the installation load of the compressor and motor on the oil separator cylinder is avoided, significantly extending the service life of the oil separator.

[0013] In a specific embodiment, the connection between the upper load-bearing component and the horizontal oil separator support component includes welding or bolting, and a shock-absorbing pad may be installed at the connection. Using welding or bolting at the connection between the upper load-bearing component and the support component effectively suppresses the transmission of vibration to the support component, improving the overall vibration resistance of the machine.

[0014] In a specific embodiment, the installation reference plane height of the horizontal oil separator support component is configured as follows: higher than the center of gravity axis of the oil separator cylinder, equal to the center of gravity axis of the oil separator cylinder, or lower than the center of gravity axis of the oil separator cylinder. Configuring the reference plane height of the support component to be higher than, equal to, or lower than the center of gravity axis of the oil separator optimizes hoisting stability according to the overall machine's center of gravity requirements, while also considering the internal space layout of the equipment and the convenience of installation and maintenance.

[0015] In a specific embodiment, the horizontal oil separator support component is a one-piece molded structure with a polygonal geometry. The one-piece molded polygonal geometry makes the overall cross-section of the support component more uniformly stressed, significantly improving its bending and torsional stiffness, while simplifying the process, increasing component precision, and keeping costs under control.

[0016] In a specific embodiment, the upper load-bearing component includes a main pressure-bearing frame and transverse reinforcing ribs, which are spaced apart along the axial direction of the main pressure-bearing frame. The main pressure-bearing frame and the transverse reinforcing ribs work together to share the load of the compressor and motor, and the axial distribution of the ribs can effectively prevent lateral deformation of the frame, resulting in a structure with good rigidity and high strength.

[0017] In specific embodiments, the main load-bearing frame comprises rectangular tubes or irregularly shaped steel. Using rectangular tubes or irregularly shaped steel as the main load-bearing component provides both high strength and lightweight characteristics, and facilitates cutting, grooving, and welding, thereby improving manufacturing efficiency and reducing material costs.

[0018] In a specific embodiment, lifting lugs extend from both ends of the outer transverse reinforcing ribs. These lifting lugs form an integrated lifting component, eliminating the need for additional lifting lug welding and improving lifting reliability and on-site installation efficiency.

[0019] In a specific embodiment, the main bearing frame is provided with a fitting groove, and the lifting ear plate is fitted into the fitting groove and fixed by welding interlocking. By pre-setting the fitting groove on the main bearing frame, the lifting ear plate is embedded and welded interlocked, resulting in higher rigidity and strength of the connection surface, significantly improved shear resistance and load-bearing capacity, and more precise and stable assembly.

[0020] In a specific embodiment, a support base plate for fixing the compressor and motor is also provided at the upper end of the transverse reinforcing rib plate. Providing the support base plate for the compressor and motor on the transverse reinforcing rib plate ensures that both have planar positioning surfaces during installation, guaranteeing the flatness and alignment accuracy of the base installation.

[0021] In a specific embodiment, one or more sets of stress relief holes are provided on the side wall of the horizontal oil separator support component. Providing stress relief holes on the side wall of the support component can effectively disperse stress concentration at folds and corners, preventing fatigue cracks.

[0022] This utility model discloses a heat pump base frame structure that achieves physical isolation between the oil separator cylinder and the main load-bearing components through a "top load-bottom isolation" dual-component separation load-bearing design, greatly improving the durability of the oil separator and the vibration resistance of the unit. The multi-sided folded integrated support component, combined with adjustable height, stress holes, and compact spatial layout, enhances structural rigidity and stability while saving installation space. The main pressure-bearing frame, in conjunction with transverse stiffeners, interlocking lifting lugs, and support base plates, makes the hoisting, installation, and maintenance of the entire unit simpler and more efficient. The overall solution takes into account strength, reliability, manufacturability, and maintainability. Attached Figure Description

[0023] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0024] Figure 1 A right view of a heat pump chassis structure according to an embodiment of the present invention is shown;

[0025] Figure 2A structural schematic diagram of an upper load-bearing member according to an embodiment of the present invention is shown;

[0026] Figure 3 A front view of the upper load-bearing member according to an embodiment of the present invention is shown;

[0027] Figure 4 A schematic diagram of a transverse reinforcing rib plate with lifting lugs according to an embodiment of the present invention is shown;

[0028] Figure 5 A schematic diagram of the fitting groove on a rectangular tube according to an embodiment of the present invention is shown;

[0029] Figure 6 A schematic diagram of the structure of a horizontal oil separator support member according to an embodiment of the present invention is shown;

[0030] Figure 7 A schematic diagram of the assembly structure of a heat pump base frame according to an embodiment of the present invention is shown;

[0031] The meanings of the numbers in the figure are as follows: 1. Upper load-bearing component; 1-1. Lifting lug; 1-2. Reinforcing rib; 1-3. Rectangular tube; 2. Horizontal oil separator support component; 2-1. Stress relief hole; 3. Horizontal oil separator cylinder. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0033] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] The specific embodiments of this utility model have been described above, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

[0035] Figure 1 A right view of a heat pump chassis structure according to an embodiment of the present invention is shown, as follows: Figure 1As shown, the base frame structure consists of an upper load-bearing component 1 and a horizontal oil separator support component 2. The upper load-bearing component 1 supports the compressor and motor, forming a space between them for housing the oil separator cylinder 3. The oil separator cylinder 3 is only positioned and connected to the horizontal oil separator support component 2 via flanges or clamps, and has no contact with the upper load-bearing component 1. The entire structure achieves a "load on top, isolation below" load-bearing method, avoiding the oil separator cylinder from bearing the vibration load of the compressor, thereby extending its service life.

[0036] Figure 2 A schematic diagram of the upper load-bearing member according to an embodiment of the present invention is shown, as follows: Figure 2 As shown, the upper load-bearing component 1 includes: a main pressure-bearing frame, composed of multiple parallel rectangular tubes 1-3, which are connected by welding or bolts to form a high-strength integral frame; transverse reinforcing ribs 1-2, arranged at equal intervals along the axial direction of the main pressure-bearing frame, with a supporting base plate welded to the upper end of each rib for fixing the compressor and motor, improving installation flatness and alignment accuracy; and lifting lugs 1-1, located at the ends of the two outermost ribs, extending outward to form an integrated lifting structure, which is fixed by fitting with the main frame's interlocking grooves and welding to ensure lifting reliability. This design balances lightweight and high load-bearing capacity while reducing on-site lifting lug installation procedures. The combination design of rectangular tubes and reinforcing ribs, with adjustable spacing of the reinforcing ribs 1-2, allows for quick adaptation to different models of compressors and motors.

[0037] Figure 3 A front view of the upper load-bearing member according to an embodiment of the present invention is shown, as follows: Figure 3 As shown, each rectangular tube has one or more slots along its middle section to form a fitting fit with the lifting lug 1-1; the depth and number of slots can be adjusted according to the lifting force requirements. After the lifting lug 1-1 is inserted into the slot, it is fixed by continuous welds, forming an interlocking structure with extremely strong shear resistance. This structure improves the shear resistance and overall stability of the lifting connection surface.

[0038] Figure 4 A schematic diagram of a transverse reinforcing rib plate with lifting lugs according to an embodiment of the present invention is shown, as follows: Figure 4 As shown, the main body of the stiffening plate is formed by bending steel plate; lifting ear plates 1-1 extend from both ends, and the ear plates are integrally formed with the stiffening plate, with openings for lifting; this design realizes the organic combination of the stiffening plate's load-bearing and lifting functions, and simplifies the number of parts.

[0039] Figure 5 A schematic diagram of the fitting groove on a rectangular tube according to an embodiment of the present invention is shown, as follows: Figure 5As shown, each rectangular tube has a variable depth fitting groove in the middle of its side wall that matches the thickness of the lifting lug. After the lifting lug is inserted into the groove, it is locked by welding to form a high-rigidity interlocking connection, which avoids relative displacement during the lifting process.

[0040] Figure 6 A schematic diagram of the structure of a horizontal oil separator support member according to an embodiment of the present invention is shown, as follows: Figure 6 As shown, the support component is constructed from a polygonal geometric thin steel plate integrally formed by folding, exhibiting high rigidity and lightweight characteristics. One or more sets of stress relief holes 2-1 are opened on the side wall. The shape, number, and position of the holes can be optimized according to the stress distribution to prevent stress concentration at the folds and corners, reduce the risk of fatigue failure, and the stress holes can also be used for pipe routing, making the refrigeration or heating unit structure compact and space-saving.

[0041] Figure 7 A schematic diagram of the assembly structure of a heat pump base frame according to an embodiment of the present invention is shown, as follows: Figure 7 As shown, the upper load-bearing component 1 is connected to the horizontal oil separator support component 2 by welding or bolts; the oil separator cylinder 3 is placed between the two, and is only positioned with the support component 2 by clamps, without contacting the upper load-bearing component 1. This assembly method achieves detachable maintenance, vibration isolation, and convenient installation of the overall structure.

[0042] This application aims to design a novel unit base structure where the oil separator cylinder is stress-free. The compressor and motor supports are fixed to the horizontal oil separator support to extend the service life of the oil separator and reduce the thickness of the oil separator cylinder wall. The horizontal oil separator support is integrally formed using steel plate folding, and its polygonal geometric structure makes the unit base frame more evenly stressed, transmitting more load while making the unit structure more stable. Secondly, this base frame can lower the center of gravity height during unit hoisting, improving stability. Furthermore, the stress holes in this horizontal oil separator support can be used for pipe routing, making the refrigeration or heating unit structure compact and space-saving.

[0043] In the description of this utility model, it should be understood that the terms "upper," "lower," "inner," "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used for improvement. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A heat pump base frame structure, characterized in that, include The upper load-bearing structure supports the compressor and motor; The horizontal oil separator support component is separately disposed from the upper load-bearing component, and the two form an accommodating space for the oil separator cylinder. The oil separator cylinder is only positioned and connected to the horizontal oil separator support component, and the oil separator cylinder has no contact with the upper load-bearing component.

2. The heat pump base frame structure according to claim 1, characterized in that, The connection between the upper load-bearing component and the horizontal oil separator support component includes welding or bolting, and the connection part is provided with a shock-absorbing pad.

3. The heat pump base frame structure according to claim 1, characterized in that, The installation reference plane height of the horizontal oil separator support component is configured as follows: higher than the centroidal axis of the oil separator cylinder, equal to the centroidal axis of the oil separator cylinder, or lower than the centroidal axis of the oil separator cylinder.

4. The heat pump base frame structure according to claim 1, characterized in that, The horizontal oil separator support component is a folded, integrated molding structure with a polygonal geometric structure.

5. The heat pump base frame structure according to claim 1, characterized in that, The upper load-bearing component includes a main pressure-bearing frame and transverse reinforcing ribs, which are arranged at intervals along the axial direction of the main pressure-bearing frame.

6. The heat pump base frame structure according to claim 5, characterized in that, The main pressure-bearing frame includes rectangular tubes or irregularly shaped steel.

7. The heat pump base frame structure according to claim 5, characterized in that, Lifting lugs extend from both ends of the outer transverse reinforcing ribs.

8. The heat pump base frame structure according to claim 7, characterized in that, The main pressure-bearing frame is provided with a fitting groove, and the lifting ear plate is engaged with the fitting groove and fixed by welding interlocking.

9. The heat pump base frame structure according to claim 5, characterized in that, The upper end of the transverse reinforcing rib is also provided with a support base plate for fixing the compressor and the motor.

10. The heat pump base frame structure according to claim 1, characterized in that, The sidewall of the horizontal oil separator support component is provided with one or more sets of stress relief holes.

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