Multi-system heat pump case frame assembly method and multi-system heat pump case frame

Abstract

The invention relates to the technical field of heat pump installation, in particular to a multi-system heat pump case frame assembling method and a multi-system heat pump case frame. The multi-system heat pump case frame assembling method comprises the following steps that the base assembly is assembled, the inner short stand columns and the middle cross beam assembly are installed at all corners of the base assembly correspondingly, and the middle cross beam assembly is installed on the upper top faces of the multiple inner short stand columns in a supported mode; a water pan assembly is fixedly installed on the middle cross beam assembly, and a plurality of fin type heat exchangers are sequentially and correspondingly installed on the water pan assembly; an outer long stand column is installed on the outer side of each inner short stand column in a buckled mode, and the top faces of the outer long stand columns are higher than the top face of the fin type heat exchanger so as to form a fence for the fin type heat exchanger. A fan assembly is cooperatively installed on the top of the fin type heat exchanger. The inner short stand columns are matched with the outer long stand columns, so that the outer long stand columns can be assembled after the fin type heat exchanger is assembled, the possibility that the fin type heat exchanger is scratched is reduced, and the quality reliability of the fin type heat exchanger and products is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat pump installation, and in particular to a multi-system heat pump chassis frame assembly method and a multi-system heat pump chassis frame. Background Art

[0002] Large heat pump units are usually double-layer structures. During assembly, a sheet metal chassis frame needs to be designed as the main skeleton to support and fix other parts of the unit. The sheet metal chassis frame is composed of sheet metal structures such as columns, beams or beam assemblies, support beams, water tray assemblies, panels, and top beam assemblies. The traditional connection and fixing method is usually to assemble and fix the chassis frame sheet metal by bolting from the outside, in which the beams or beam assemblies are placed on the columns for fixing, forming a stable preliminary frame at the bottom before assembling the upper finned heat exchanger.

[0003] On the other hand, the fin heat exchangers of large heat pump units are usually heavy and large in size, which is time-consuming and laborious to lift manually. In addition, the damage to the fin heat exchangers caused by collisions during transportation is large and uncontrollable, so hoisting or clamping is usually used. When hoisting or clamping, the lower preliminary frame needs to be assembled before hoisting the upper fin heat exchanger. The columns of the chassis frame have been pre-installed, which greatly increases the possibility of scratches by the columns when assembling the fin heat exchanger. This not only affects the appearance of the fin heat exchanger after installation, but also greatly increases the quality risk of assembling the fin heat exchanger. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that there is a risk of columns scratching the fin heat exchanger during the assembly process of large heat pump units, thereby providing a multi-system heat pump chassis frame assembly method and a multi-system heat pump chassis frame.

[0005] In order to solve the above technical problems, the present invention provides a multi-system heat pump chassis frame assembly method, comprising the following steps:

[0006] Assemble the base assembly, install inner short columns at each corner of the base assembly, install the middle crossbeam assembly, and support and install the middle crossbeam assembly on the upper top surface of multiple inner short columns;

[0007] The water receiving pan assembly is fixedly mounted on the middle cross beam assembly, and a plurality of fin heat exchangers are sequentially mounted on the water receiving pan assembly accordingly;

[0008] An outer long column is buckled and installed on the outer side of each inner short column, and the top surface of the outer long column is higher than the top surface of the fin heat exchanger;

[0009] A fan assembly is installed on the top of the fin heat exchanger, and the fan assembly is supported by an external long column.

[0010] Optionally, a plurality of fin heat exchangers are arranged in a centrally symmetrical manner, and the plurality of fin heat exchangers are surrounded to form an air cavity.

[0011] Optionally, the method further includes installing a middle partition assembly in the air cavity to divide the air cavity into a plurality of sub-air cavities.

[0012] Optionally, the step of installing a fan assembly on the top of the fin heat exchanger includes: pre-assembling the top beam assembly and a plurality of fan assemblies to form a pre-assembly, and then installing the pre-assembly as a whole on the top of the outer long column.

[0013] Optionally, the top beam assembly is fixedly mounted on the outer long column, and the fan assembly and the fin heat exchanger are installed in a one-to-one correspondence.

[0014] Optionally, a fixing plate is installed at the connection between two adjacent fin heat exchangers, and two ends of the fixing plate are fixedly connected to the two fin heat exchangers respectively.

[0015] Optionally, a sealing plate is installed between two adjacent fin heat exchangers to completely seal the gap between the fin heat exchangers.

[0016] Optionally, a drainage groove is provided on the top surface of the water receiving tray assembly, the shape of the drainage groove is adapted to the shape of the bottom surface of the fin heat exchanger, a limiting block is provided on the drainage groove, and the fin heat exchanger is installed in abutment with the limiting block.

[0017] Optionally, before installing the middle cross beam assembly, the step also includes: installing a lower middle column on the base assembly, the upper top surface of the lower middle column is flush with the upper top surface of the inner short column, and the middle cross beam assembly support is installed on the upper top surface of the inner short column and the lower middle column.

[0018] The present invention also provides a multi-system heat pump chassis frame, which is assembled by the multi-system heat pump chassis frame assembly method of the present invention.

[0019] The technical solution of the present invention has the following advantages:

[0020] 1. The multi-system heat pump chassis frame assembly method provided by the present invention first assembles the base assembly, and then firmly installs the inner short column at each corner position of the base assembly. Next, the middle crossbeam assembly is supported and installed on the top plane of all the inner short columns. After that, the water receiving pan assembly is fixedly installed on the middle crossbeam assembly, and multiple fin heat exchangers are installed one by one on the water receiving pan assembly according to the layout. After the installation of the fin heat exchanger is completed, the outer long column is buckled and installed on the outside of each inner short column to ensure that the top of the outer long column is at least flush with the top of the fin heat exchanger. Finally, the fan assembly is installed on the top of the outer long column to complete the overall assembly. Through the double-column assembly scheme of the inner short column and the outer long column, the traditional single-column assembly process is changed, so that the outer long column can be assembled after the fin heat exchanger is assembled, and the possibility of the fin heat exchanger being scratched by the column is reduced to almost zero, which significantly improves the quality reliability of the fin heat exchanger and the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figures 1 to 13 A schematic diagram of the steps of a multi-system heat pump chassis frame assembly method provided in an embodiment of the present invention.

[0023] Explanation of the reference numerals: 1. base assembly; 2. outer long column; 3. inner short column; 4. lower middle column; 5. triangular reinforcement plate; 6. middle cross beam assembly; 7. water collection tray assembly; 8. upper support column; 9. top beam assembly; 10. fan assembly; 11. limit block; 12. drainage trough; 13. fixing plate; 14. sealing plate; 15. fin heat exchanger; 16. middle partition assembly; 17. first-order drainage outlet; 18. second-order drainage outlet. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected 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.

[0027] In addition, 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.

[0028] Figures 1 to 13 The figure shows a schematic diagram of the steps of the multi-system heat pump chassis frame assembly method provided in this embodiment. The multi-system heat pump chassis frame provided in this embodiment is composed of a base assembly 1, an outer long column 2, an inner short column 3, a lower middle column 4, a triangular reinforcement plate 5, a middle cross beam assembly 6, a water tray assembly 7, an upper support column 8, a top beam assembly 9 and a fan assembly 10. The assembly method includes the following steps:

[0029] First, if Figure 1 As shown, assemble the base assembly 1, and install the inner short columns 3 at each corner of the base assembly 1. After completing the assembly of the base assembly 1 and the materials on the base assembly 1, the four inner short columns 3 are fixed to the threaded fixing holes on the base assembly 1 through bolts. Generally, three bolts are selected for each inner short column 3 to be fixed to the corners of the base assembly 1; or each inner short column 3 is fixed with nuts after three bolts pass through the through holes on the base assembly 1. The bolts are installed on the inner side of the inner short column 3. As shown in FIG. Figure 2 As shown, the lower center column 4 is installed on the base assembly 1, and the upper top surface of the lower center column 4 is flush with the upper top surface of the inner short column 3. The other lower center columns 4 are also assembled to the base assembly 1 of the unit using bolts to assist in supporting the weight of the upper part of the heat pump unit. Figure 3As shown, the middle cross beam assembly 6 is installed, and the middle cross beam assembly 6 is supported and installed on the upper top surface of the inner short column 3 and the lower middle column 4. The middle cross beam assembly 6 is placed on the support plane formed by the inner short column 3 and the lower middle column 4, and bolts are used to assemble and fix after aligning the holes, so that the inner short column 3, the lower middle column 4 and the middle cross beam assembly 6 form a stable fixed frame. In this embodiment, the middle cross beam assembly 6 is composed of four cross beams around and two cross beams in the middle. The two middle cross beams are connected in an overlapping manner, and one of the cross beams is overlapped on the top of the other cross beam to enhance the stability and bearing capacity of the structure. In order to provide additional support for the middle cross beam, an intermediate support column is straightened and arranged in the middle position on the base assembly 1, and the intermediate support column extends upward and is connected to the middle cross beam assembly 6. Specifically, the support column can be set at the intersection below the overlapped cross beam, or two intermediate support columns can be set, respectively located below the overlapped cross beam direction. The middle support column can be firmly mounted on the base assembly 1 by bolts, flat joints or other appropriate fixing methods to ensure the stability and load-bearing capacity of the middle beam cabinet frame.

[0030] Then, the water receiving pan assembly 7 is fixedly mounted on the middle cross beam assembly 6, and a plurality of fin heat exchangers 15 are sequentially mounted on the water receiving pan assembly 7. Figure 4 As shown, four water tray assemblies 7 are manually lifted or hoisted one by one to the fixed frame formed by the inner short column 3, the lower middle column 4 and the middle cross beam assembly 6, and then fastened with bolts after aligning with the holes on the middle cross beam assembly 6. Each water tray assembly 7 is fixed to the middle cross beam assembly 6 with three to four bolts. Figures 5 to 7As shown, since the fin heat exchanger 15 is heavy and large in size, manual lifting is time-consuming and laborious, so it is assembled by hoisting or clamping. In this embodiment, four fin heat exchangers 15 are provided, and the four fin heat exchangers 15 are arranged in a central symmetrical manner, and multiple fin heat exchangers 15 are surrounded to form an air cavity. In some other embodiments, the number of fin heat exchangers 15 to be installed can be determined according to actual conditions. When installing the fin heat exchanger 15, a middle partition assembly 16 is installed in the air cavity to divide the air cavity into multiple sub-air cavities. A drainage groove 12 formed by a raised structure is provided on the top surface of the water receiving tray assembly 7. The shape of the drainage groove 12 is adapted to the shape of the bottom surface of the fin heat exchanger 15. A limit block 11 is provided on the drainage groove 12, and the fin heat exchanger 15 is installed in contact with the limit block 11. A first-order drain port 17 is provided in the drain groove 12 on the top surface of the water receiving tray assembly 7. When the fin heat exchanger 15 is installed, the bottom of the body of the fin heat exchanger 15 is aligned with the first-order drain port 17, and the inner cavity of the fin heat exchanger 15 is aligned with the drain groove 12. Four second-order drain ports 18 are provided in the water receiving tray assembly 7. The four second-order drain ports 18 are arranged around the center point of the water receiving tray assembly 7, and a second-order drain port 18 is provided at the corresponding position of each fin heat exchanger 15. The condensed water generated when the fin heat exchanger 15 is working is discharged from the first-order drain port 17; when the condensed water generated by the fin heat exchanger 15 is large, or when there is a lot of water accumulated on the water receiving tray assembly 7 in rainy weather, the accumulated water in the drain groove 12 flows over the middle convex structure to the center of the water receiving tray assembly 7 and is discharged from the second-order drain port 18. The first-order drain port 17 and the second-order drain port 18 form a two-order drainage structure. A middle partition assembly 16 is designed between the four fin heat exchangers 15, thereby forming two sub-air chambers. When assembling the fin heat exchanger 15, you can first select a fin heat exchanger 15 of one of the sub-air chambers and assemble it to the water receiving tray assembly 7 by hoisting or clamping. The water receiving tray assembly 7 is provided with a limit block 11 that cooperates with the fin heat exchanger 15 to limit the position, which can more efficiently complete the positioning and assembly of the fin heat exchanger 15. At the same time, the limit also prevents the movement of the fin heat exchanger 15, avoiding the risk of wear and leakage of fluorine of the fin heat exchanger 15. The fin heat exchanger 15 is supported and installed on the water receiving tray assembly 7 by the limit block 11, which can prevent the fin heat exchanger 15 from scratching the water receiving tray assembly 7. After completing the assembly of one fin heat exchanger 15, assemble another fin heat exchanger 15 of the same sub-air chamber. Then assemble the two fin heat exchangers 15 of another sub-air cavity, and assemble from the side where the current fin heat exchanger 15 is to be installed. By sequentially installing multiple fin heat exchangers 15, there is no risk of scratches or the like during the assembly of the fin heat exchanger 15. In this embodiment, the fin heat exchanger 15 has four fin heat exchangers 15 sequentially connected to form a matrix structure, that is, the four fin heat exchangers 15 are sequentially connected around the center to form a rectangular structure.During installation, one fin heat exchanger 15 is hoisted at a time. First, two adjacent fin heat exchangers 15 are hoisted and placed on the same side of the water receiving tray assembly 7. Then, the middle partition assembly 16 is installed on the water receiving tray assembly 7. The middle partition assembly 16 and the two adjacent fin heat exchangers 15 together form a heat exchange sub-air cavity, and then the other two fin heat exchangers 15 are hoisted. In this way, a heat pump with four fin heat exchangers 15 is formed, which can provide two heat exchange air cavities and improve the efficiency during operation. The fin heat exchanger 15 is a bent structure that can form an air cavity with the middle partition assembly 16 for the passage of heat exchange air. The middle partition assembly 16 can form a sub-air cavity with only one fin heat exchanger 15, or it can form a wind cavity with two or more fin heat exchangers 15. In this embodiment, the middle partition assembly 16 and the two adjacent fin heat exchangers 15 together form a sub-air cavity.

[0031] like Figure 8 As shown, a fixing plate 13 is installed at the connection between two adjacent fin heat exchangers 15, and both ends of the fixing plate 13 are fixedly connected to the two fin heat exchangers 15 respectively. Fig. 9 As shown, a sealing plate 14 is installed between two adjacent fin heat exchangers 15 to completely seal the gap between the fin heat exchangers 15 to form a closed air cavity to prevent air leakage. After the fin heat exchangers 15 are installed, the two adjacent fin heat exchangers 15 are pre-fixed on the adjacent end plates of the fin heat exchangers 15 through the fixing plate 13 to form a pulling reinforcement between the two fin heat exchangers 15, and then the sealing plate 14 of the fin heat exchanger 15 and the end plate of the fin heat exchanger 15 are aligned with the fixing hole position and fixed.

[0032] Then, if Fig.10As shown, the outer long column 2 is buckled and installed on the outer side of each inner short column 3, and the top surface of the outer long column 2 is higher than the top surface of the fin heat exchanger 15 to form a fence for the fin heat exchanger 15. After the assembly of the fin heat exchanger 15 is completed, the four column assemblies are placed vertically and translated horizontally toward the inner short column 3. The transition step in the middle of the outer long column 2 is abutted against the middle cross beam assembly 6 up and down, and the bottom support section below and the inner short column 3 are moved to the appropriate limit position to position them first. A horizontally arranged limit strip is installed on the outer long column 2 at the position on the upper side of the transition step. The spacing between the limit strip and the upper side of the transition step matches the thickness of the middle cross beam assembly 6, so that the limit strip can cooperate with the transition step to clamp the middle cross beam assembly 6 between the two. Positioning parts extend downward from the bottom of the inner folded parts on both sides of the bottom support section of the outer long column 2, and a positioning groove is provided on the base assembly 1. When the outer long column 2 moves close to the inner short column 3, the positioning part sinks into the positioning groove under the action of gravity to pre-position the outer long column 2. An inner folding edge is provided at the bottom of the outer long column 2, and an outer folding edge is provided at the bottom of the inner short column 3. A clearance opening is provided on the inner folding edge, and the shape of the clearance opening is adapted to the shape of the outer folding edge, so that when the outer long column 2 moves close to the inner short column 3, the inner folding edge is inserted into the clearance opening on the outer folding edge to achieve the coordinated positioning of the inner folding edge and the outer folding edge. Fig.11 As shown, when the outer long column 2 moves to the preset limit position of the inner short column 3, the bottom of the inner folded part on both sides of the outer long column 2 is strongly connected to the base assembly 1, and the middle part is strongly connected to the middle cross beam assembly 6 through the triangular reinforcement plate 5 to ensure the stability of the bottom frame structure.

[0033] Finally, the fan assembly 10 is installed on the top of the fin heat exchanger 15. Specifically, after the fan assembly 10 and the outer long column 2 are installed, the upper support column 8 is installed on the middle cross beam assembly 6. One end of the upper support column 8 is fixedly connected to the middle cross beam assembly 6 through a connecting piece, and the other end is fixedly connected to the top beam assembly 9 through a connecting piece. Fig.12 As shown, during installation, multiple fan assemblies 10 are hoisted and supported and installed on the frame inside the top beam assembly 9, and then each fan assembly 10 is fixedly connected to the top beam assembly 9. The top beam assembly 9 and multiple fan assemblies 10 are assembled to form a pre-assembly, and then the pre-assembly is installed as a whole on the top of the outer long column 2 and the upper support column 8. Fig.13 As shown, the top beam assembly 9 is fixedly installed on the outer long column 2 and the upper support column 8 through a connecting piece, and the fan assembly 10 is installed one-to-one with the fin heat exchanger 15. The fan assembly 10 is installed on the top of the fin heat exchanger 15, but a gap is reserved between the fin heat exchanger 15 and the fan assembly 10 during installation, and the fin heat exchanger 15 does not support the fan assembly 10. In some other embodiments, when installing the fan assembly 10, the top beam assembly 9 is first hoisted and fixedly installed on the outer long column 2 and the upper support column 8, and then the four fan assemblies 10 are installed on the top beam assembly 9 one-to-one.

[0034] The multi-system heat pump chassis frame assembly method provided in this embodiment is designed from the perspective of structural assembly requirements, strength requirements, appearance requirements, process requirements and production and manufacturing requirements. Combined with the processing capacity and equipment capacity of the production line itself, a production plan can be designed to meet the needs of efficient production. The double-column assembly scheme of the inner short column 3 and the outer long column 2 changes the traditional single-column assembly process, so that the outer long column 2 can be assembled after the fin heat exchanger 15 is assembled, reducing the possibility of the fin heat exchanger 15 being scratched by the column to almost zero, significantly improving the quality reliability of the fin heat exchanger 15 and the product.

[0035] This embodiment also provides a multi-system heat pump chassis frame, which is assembled by the multi-system heat pump chassis frame assembly method described in this embodiment, such as Fig.13 As shown, it includes a base assembly 1, an outer long column 2, an inner short column 3, a lower middle column 4, a triangular reinforcement plate 5, a middle crossbeam assembly 6, a water tray assembly 7, an upper support column 8, a top beam assembly 9 and a fan assembly 10. Both ends of the inner short column 3 are provided with folded edges extending inward, and the base assembly 1 and the middle crossbeam assembly 6 are fixed to the folded edges by bolting. The base assembly 1 is fixed to the folded edges by three bolts, and the three bolts are not collinear to form a triangular bolting fixation; the middle crossbeam assembly 6 is fixed to the folded edges by three bolts, and the three bolts are not collinear to form a triangular bolting fixation. Through clever design, the connecting and fixing bolts of the double column structure composed of the inner short column 3 and the outer long column 2 are all inside the unit, and the connection and fixing method of the columns cannot be seen from the appearance of the unit, which greatly improves the appearance of the product and ensures a clean and tough appearance; on the other hand, the design of internal hidden bolts greatly reduces the unsightly appearance caused by protruding and rusting of bolts.

[0036] As an alternative embodiment, during the assembly process, first assemble the base assembly 1, the inner short column 3 and the lower middle column 4 as the heat pump lower structure, then separately connect and fix the middle crossbeam assembly 6 and the water tray assembly 7, and then install the fin heat exchanger 15 on the water tray assembly 7, and then snap-fit ​​the middle part of the outer long column 2 to the middle crossbeam assembly 6, and use the middle crossbeam assembly 6, the water tray assembly 7, the fin heat exchanger 15 and the outer long column 2 as the heat pump upper structure. The assembled heat pump upper structure is hoisted above the heat pump lower structure as a whole, and then the outer long column 2 is aligned with the corresponding inner short column 3 up and down, and the heat pump upper structure is lowered as a whole, so that the bottom of the outer long column 2 is snap-fitted and positioned with the base assembly 1. Finally, the top beam assembly 9 and the fan assembly 10 are installed or the top beam assembly 9 and the fan assembly 10 are used as part of the heat pump upper structure. After the heat pump upper structure is installed, the top beam assembly 9 and the fan assembly 10 are installed, and then the heat pump upper structure and the heat pump lower structure are combined up and down.

[0037] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for assembling a multi-system heat pump chassis frame, characterized in that: The following steps are involved: Assemble the base assembly (1), install the inner short columns (3) at each corner of the base assembly (1), install the middle cross beam assembly (6), and support and install the middle cross beam assembly (6) on the upper top surfaces of the plurality of inner short columns (3); The water receiving pan assembly (7) is fixedly mounted on the middle cross beam assembly (6), and a plurality of fin heat exchangers (15) are sequentially mounted on the water receiving pan assembly (7); An outer long column (2) is buckled and installed on the outer side of each inner short column (3), and the top surface of the outer long column (2) is higher than the top surface of the fin heat exchanger (15); A fan assembly (10) is installed on the top of the fin heat exchanger (15), and the fan assembly (10) is supported by an outer long column (2).

2. The multi-system heat pump chassis frame assembly method according to claim 1, characterized in that: The plurality of fin heat exchangers (15) are arranged in a centrally symmetrical manner, and the plurality of fin heat exchangers (15) are arranged to surround and form an air cavity.

3. The multi-system heat pump chassis frame assembly method according to claim 2, characterized in that: The method also includes installing a middle partition assembly (16) in the wind cavity to divide the wind cavity into a plurality of sub-wind cavities.

4. The multi-system heat pump chassis frame assembly method according to any one of claims 1 to 3, characterized in that: The step of installing the fan assembly (10) on the top of the fin heat exchanger (15) comprises: pre-assembling the top beam assembly (9) and a plurality of fan assemblies (10) to form a pre-assembled body, and then installing the pre-assembled body as a whole on the top of the outer long column (2).

5. The multi-system heat pump chassis frame assembly method according to claim 4, characterized in that: The top beam assembly (9) is fixedly mounted on the outer long column (2), and the fan assembly (10) and the fin heat exchanger (15) are mounted in a one-to-one correspondence.

6. The multi-system heat pump chassis frame assembly method according to any one of claims 1 to 3, characterized in that: A fixing plate (13) is installed at the connection between two adjacent fin heat exchangers (15), and two ends of the fixing plate (13) are fixedly connected to the two fin heat exchangers (15) respectively.

7. The multi-system heat pump chassis frame assembly method according to claim 6, characterized in that: A sealing plate (14) is installed between two adjacent fin heat exchangers (15) to completely seal the gap between the fin heat exchangers (15).

8. The multi-system heat pump chassis frame assembly method according to any one of claims 1 to 3, characterized in that: A drainage groove (12) is provided on the top surface of the water receiving tray assembly (7), the shape of the drainage groove (12) is adapted to the shape of the bottom surface of the fin heat exchanger (15), a limiting block (11) is provided on the drainage groove (12), and the fin heat exchanger (15) is installed in abutment with the limiting block (11).

9. The multi-system heat pump chassis frame assembly method according to any one of claims 1 to 3, characterized in that: Before the step of installing the middle cross beam assembly (6), the step also includes: installing a lower middle column (4) on the base assembly (1), the upper top surface of the lower middle column (4) is flush with the upper top surface of the inner short column (3), and the middle cross beam assembly (6) is supported and installed on the upper top surfaces of the inner short column (3) and the lower middle column (4).

10. A multi-system heat pump chassis frame, characterized in that: It is assembled by the multi-system heat pump chassis frame assembly method described in any one of claims 1 to 9.

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