Mounting structure for plate heat exchanger

Abstract

The utility model discloses a kind of installation structures for plate heat exchanger in the technical field of air conditioning equipment, including air conditioner pedestal, plate heat exchanger and L-shaped fixed plate, L-shaped fixed plate includes mutually perpendicular connection vertical plate and horizontal plate, vertical plate is fixedly connected with plate heat exchanger, horizontal plate is fixedly connected with air conditioner pedestal, L-shaped fixed plate has at the front side of right-angle bending opening and the rear side opposite with front side, part rear side surface of L-shaped fixed plate is recessed to front side, front side corresponding position is protruding and forms reinforcing rib, reinforcing rib includes first rib part on vertical plate and second rib part on horizontal plate, first rib part and second rib part are connected at the right-angle bending place of L-shaped fixed plate.The utility model solves the technical problem that the existing plate heat exchanger appears to shake in the process of transportation, and further causes the fracture of copper pipe connected therewith.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment technology, and in particular to an installation structure for plate heat exchangers. Background Technology

[0002] In the production of multi-split air conditioning units, plate heat exchangers are typically installed on the air conditioner base to improve heat exchange efficiency. These plate heat exchangers connect to the copper pipes of the air conditioning refrigeration components, significantly enhancing the heat exchange performance of the refrigeration components. Plate heat exchangers consist of a series of stacked metal plates with specific corrugated shapes. Due to their considerable weight, a specialized installation structure is required to securely fix the plate heat exchanger to the air conditioner base and prevent it from shaking.

[0003] In existing technologies (such as) Figure 1 As shown in the image, L-shaped mounting plates are commonly used for installation. These L-shaped mounting plates consist of vertically connected vertical and horizontal plates. The vertical plates are connected to the plate heat exchanger with screws, while the horizontal plates are fixed to the air conditioner base with screws.

[0004] However, in practical applications, it has been found that after long-distance transportation, the L-shaped fixing plate of the existing technology is very prone to bending and deformation. This causes the plate heat exchanger to shake during transportation, which in turn causes the copper pipes connected to it to break. Utility Model Content

[0005] To address the technical problem that existing plate heat exchangers experience shaking during transportation, which can lead to breakage of the copper tubes connected to them, this utility model provides an installation structure for plate heat exchangers.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An installation structure for a plate heat exchanger is provided, including an air conditioner base, a plate heat exchanger, and an L-shaped fixing plate. The L-shaped fixing plate includes a vertical plate and a horizontal plate that are perpendicularly connected to each other. The vertical plate is fixedly connected to the plate heat exchanger, and the horizontal plate is fixedly connected to the air conditioner base. The L-shaped fixing plate has a front side located at the right-angle bend opening and a rear side opposite to the front side. A portion of the rear surface of the L-shaped fixing plate is recessed towards the front side, and a corresponding position on the front side is raised to form a reinforcing rib. The reinforcing rib includes a first rib portion located on the vertical plate and a second rib portion located on the horizontal plate. The first rib portion and the second rib portion are connected at the right-angle bend of the L-shaped fixing plate.

[0008] Furthermore, there are two reinforcing ribs, which are arranged side by side and spaced apart along the left and right sides of the vertical plate.

[0009] Furthermore, a smooth transition structure is provided at the junction of the first rib and the second rib on the front side of the L-shaped fixing plate.

[0010] Furthermore, the front surface of the transition structure is stamped and recessed towards the rear, bringing the transition structure closer to the rear of the L-shaped fixing plate.

[0011] Furthermore, the left and right edges of the vertical plate and the left and right edges of the horizontal plate both have bent edges that bend towards the front of the L-shaped fixed plate.

[0012] Furthermore, the bending angle of the bent edge is 80° to 100°.

[0013] Furthermore, both the vertical and horizontal plates have smooth transition cuts at the junction of their bent edges.

[0014] Furthermore, the bottom of the horizontal plate is provided with a locking protrusion, and the air conditioner base is provided with a corresponding locking groove, with the locking protrusion and the locking groove engaging in a locking fit.

[0015] Furthermore, the embossed part is a raised structure formed by pressing a local surface of the upper surface of the horizontal plate onto the lower surface of the horizontal plate.

[0016] Furthermore, a first through hole is provided on the vertical plate, and a stud is correspondingly provided on the plate heat exchanger. The stud passes through the first through hole, and the rear side of the vertical plate contacts the plate heat exchanger. It also includes a nut, which is threadedly connected to the stud. The nut presses against the front side of the vertical plate. The lower surface of the horizontal plate contacts the air conditioner base. A second through hole is provided on the horizontal plate, and a threaded hole is correspondingly provided on the air conditioner base. It also includes a screw for fixing. The tail of the screw passes through the second through hole and is threadedly connected to the threaded hole. The head of the screw presses against the upper surface of the horizontal plate.

[0017] The beneficial effects of this utility model are:

[0018] By recessing a portion of the rear surface of the L-shaped fixing plate towards the front and protruding at the corresponding position on the front side to form a reinforcing rib, and ensuring that the first rib on the vertical plate and the second rib on the horizontal plate are connected as one unit at their right-angle bends, the overall rigidity and resistance to bending deformation of the L-shaped fixing plate are significantly enhanced.

[0019] The raised reinforcing ribs effectively increase the moment of inertia of the L-shaped fixed plate section, thereby enhancing the bending resistance of both the vertical and horizontal plates and making them less prone to in-plane bending deformation under transportation vibration loads. The connection between the first and second ribs at the right-angle bend creates a continuous and rigid stress transfer path. This effectively disperses and bears the stress (especially bending moment and torque) concentrated at the corner of the L-shaped fixed plate, significantly improving the overall structural stiffness and torsional deformation resistance of the L-shaped fixed plate and avoiding the plastic deformation that is prone to occur at the corner of traditional L-shaped fixed plates. The reinforcing ribs are integrally formed with the L-shaped fixed plate through a stamping process, eliminating the need for additional welding or assembly components. This ensures structural strength and integrity while simplifying the production process and reducing manufacturing costs.

[0020] This structural design effectively overcomes the defects of existing technology, ensuring that the L-shaped fixing plate of the multi-split air conditioning unit is not prone to bending and deformation after long-distance transportation, thereby eliminating the shaking phenomenon caused by unstable fixing of the plate heat exchanger, fundamentally avoiding the problem of breakage of the copper pipes connected to it, and significantly improving the transportation stability of the product. Attached Figure Description

[0021] Figure 1 This is a structural diagram of an L-shaped fixing plate in the prior art;

[0022] Figure 2 This is an exploded view of the installation structure of the plate heat exchanger according to this utility model;

[0023] Figure 3 This is a schematic diagram of a plate heat exchanger and an L-shaped fixing plate installed on an air conditioner base;

[0024] Figure 4 This is a structural schematic diagram of the L-shaped fixing plate of this utility model;

[0025] Figure 5 This is a structural schematic diagram of the L-shaped fixing plate of this utility model from another angle;

[0026] Figure 6 This is a structural schematic diagram of the L-shaped fixing plate of this utility model from another angle;

[0027] Figure 7 Is Figure 6 Based on this, a partial structural section is cut open to reveal a schematic diagram of the reinforcing ribs;

[0028] Figure 8 This is a schematic diagram of the transition structure without any recessed treatment.

[0029] Figure 9 This is a schematic diagram of the installation structure of the plate heat exchanger of this utility model in a multi-split air conditioning unit.

[0030] The markings in the diagram are as follows: 1-Air conditioner base, 2-Plate heat exchanger, 3-L-shaped fixing plate, 31-Vertical plate, 32-Horizontal plate, 4-Reinforcing rib, 41-First rib, 42-Second rib, 5-Transition structure, 6-Bent edge, 7-Slit, 8-Protrusion, 9-Slot, 10-First through hole, 11-Stud, 12-Nut, 13-Second through hole, 14-Threaded hole, 15-Screw. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the present invention will be further described below with reference to the accompanying drawings.

[0032] First, it should be stated that the technical solutions of the embodiments of this application are clearly and completely described. The described embodiments are only some of the embodiments of this application, and not a limitation of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0033] In the description of this utility model, it should be understood that the terms "first", "second", "upper", "lower", "left", "right", "inner", "outer", "axial" or "radial" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and are not intended to indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0034] like Figure 1 As shown, existing technologies commonly use L-shaped mounting plates 3 for installation. These L-shaped mounting plates 3 include vertical plates 31 and horizontal plates 32 connected perpendicularly to each other. The vertical plate 31 is connected to the plate heat exchanger 2 by fastening screws or bolts, while the horizontal plate 32 is fixed to the air conditioner base 1 by fastening screws or bolts. Due to the lack of structural reinforcement, the L-shaped mounting plates 3 of existing technologies are prone to bending and deformation after long-distance transportation of multi-split air conditioning units. This causes the plate heat exchanger 2 to shake during transportation, which in turn leads to the breakage of the copper pipes connected to it.

[0035] like Figures 2 to 5As shown, this embodiment provides an installation structure for a plate heat exchanger, including an air conditioner base 1, a plate heat exchanger 2, and an L-shaped fixing plate 3. The L-shaped fixing plate 3 includes a vertical plate 31 and a horizontal plate 32 that are perpendicularly connected to each other. The vertical plate 31 is fixedly connected to the plate heat exchanger 2, and the horizontal plate 32 is fixedly connected to the air conditioner base 1. The L-shaped fixing plate 3 has a front side located at the right-angle bend opening and a rear side opposite to the front side. A portion of the rear surface of the L-shaped fixing plate 3 is recessed to the front side, and a corresponding position on the front side is raised to form a reinforcing rib 4. The reinforcing rib 4 includes a first rib portion 41 located on the vertical plate 31 and a second rib portion 42 located on the horizontal plate 32. The first rib portion 41 and the second rib portion 42 are connected at the right-angle bend of the L-shaped fixing plate 3.

[0036] The vertical plate 31 is fixedly connected to the plate heat exchanger 2, and the horizontal plate 32 is fixedly connected to the air conditioner base 1. This can be achieved by fastening screws or bolts, welding, or snap-fitting.

[0037] The first rib 41 and the second rib 42 are usually made using sheet metal processing. The first rib 41 and the second rib 42 are connected at the right-angle bend of the L-shaped fixing plate 3, preferably vertically connected, that is, the first rib 41 and the second rib 42 are both perpendicular to the bend line at the right angle of the L-shaped fixing plate 3; of course, they can also deviate from vertical, such as 80° or 70°, as long as the first rib 41 and the second rib 42 are still connected.

[0038] The preferred number of reinforcing ribs 4 is two, arranged side-by-side with intervals along the left-right direction of the vertical plate 31. This arrangement of two parallel reinforcing ribs 4 maintains good strength while reducing processing difficulty and manufacturing costs. Of course, one or more ribs can also be used; the specific number will be adjusted according to the actual working conditions.

[0039] like Figure 8 As shown, furthermore, a smooth transition structure 5 is provided at the junction of the first rib 41 and the second rib 42 on the front side of the L-shaped fixing plate 3. To reduce stress concentration at the junction of the first rib 41 and the second rib 42, it is usually designed as an arc transition, or the transition structure 5 can be designed as an approximate arc, but its smooth transition must be ensured.

[0040] like Figure 6 and Figure 7 As shown, furthermore, the front surface of the transition structure 5 is stamped and recessed towards the rear, bringing the transition structure 5 closer to the rear side of the L-shaped fixing plate 3. A deep-pressing process is typically used to recess the front surface of the transition structure 5 towards the rear, with a corresponding protrusion on the rear side. This reduces the distance between the transition structure 5 and the rear side of the L-shaped fixing plate 3, giving the transition structure 5 greater depth, reducing the stress on the transition structure 5, and making the transition structure 5 less prone to cracking. A detailed analysis follows:

[0041] The transition structure 5 area is stamped and recessed: the front surface is locally recessed to the rear (i.e., in the thickness direction of the plate).

[0042] According to the principle of constant volume (plastic deformation), this depression inevitably leads to a local bulge at the corresponding position on the rear surface of the transition structure 5. The shape of the depression and bulge changes the material distribution in the direction perpendicular to the plate surface in this area. The depression and bulge are equivalent to forming a "miniature I-beam" or "corrugated plate" effect locally, increasing the effective cross-sectional height h of this local area at the bending axis.

[0043] σ = My / I, (σ is the bending stress, M is the bending moment acting on the cross section, y is the distance from the stress point to the neutral axis, and I is the moment of inertia of the cross section about the neutral axis).

[0044] Moment of inertia of cross section I=bh 3 / 12, Since the width b of the plate remains unchanged, when h increases, I also increases accordingly. Even if the increase in h is local and limited, it can significantly improve the bending stiffness of the local area.

[0045] For the recessed transition structure 5, y also increases with the increase of the recess height. However, since h is cubic, the moment of inertia I of the cross section increases cubically. Under the same bending moment M, the bending stress generated by the recessed transition structure 5 is smaller, which directly reduces the maximum bending stress level borne by the transition structure 5 region.

[0046] Comparing a 5mm and a 2mm dent,

[0047] The depression is 5mm, and the section height h1 ≈ plate thickness t + 5mm (slightly shifted on the neutral axis, approximately unchanged).

[0048] The depression is 2mm, and the section height h2 ≈ plate thickness t + 2mm (slightly shifted on the neutral axis, approximately unchanged).

[0049] The ratio of their moments of inertia is approximately: I1 / I2 = (h1 / h2) 3 =((t+5) / (t+2)) 3 .

[0050] Assume the plate thickness t = 2 mm;

[0051] h1≈5mm+2mm=7mm;

[0052] h2≈2mm+2mm=4mm;

[0053] I1 / I2 = (7 / 4) 3 =(1.75) 3 ≈5.359375;

[0054] Conclusion: The moment of inertia I of the 5mm concave transition structure 5 is approximately 5.36 times that of the 2mm concave structure.

[0055] The effect of y: y also increases with the increase of the indentation depth. For the transition structure 5 with an indentation of 5mm, its y1 is approximately 1.75 times that of the transition structure 5 with an indentation of 2mm.

[0056] Calculate the ratio of M: M1 / M2=([σ]I1 / y1) / ([σ]I2 / y2) =(I1 / I2)(y2 / y1)≈5.36×(1 / 1.75)≈3.06.

[0057] Conclusion: The ultimate bending moment M that the 5mm concave transition structure 5 can withstand is approximately 3.06 times that of the 2mm concave structure. Even considering the adverse effect of increased y, the bending resistance of the 5mm concave transition structure 5 still has an overwhelming advantage.

[0058] like Figures 3 to 5 As shown, furthermore, the left and right edges of the vertical plate 31 and the left and right edges of the horizontal plate 32 both have bent edges 6 that bend towards the front of the L-shaped fixed plate 3. The bent edges 6 that bend towards the front of the L-shaped fixed plate 3 are equivalent to adding "micro-reinforcing beams" to the originally open edges of the L-shaped fixed plate 3, transforming the open section into a semi-closed section, increasing the bending moment of inertia I of the section, and comprehensively enhancing rigidity and resistance to deformation.

[0059] The bending angle of the bending edge 6 is 80° to 100°, including 80°, 85°, 90° and 100°, with 90° being preferred. The bending edge 6 with a 90° angle has a higher height, which makes the bending moment of inertia I of the cross section larger and its ability to resist deformation stronger.

[0060] like Figures 3 to 5 As shown, in order to avoid stress concentration at the junction of the bending edge 6 of the vertical plate 31 and the horizontal plate 32, the junction of the bending edge 6 of the vertical plate 31 and the horizontal plate 32 has a smooth transition cut 7, which can be arc-shaped or approximately arc-shaped.

[0061] like Figures 2 to 5As shown, to achieve the pre-positioning of the L-shaped fixing plate 3 when installed on the air conditioner base 1, a locking protrusion 8 is provided at the bottom of the horizontal plate 32, and a corresponding locking groove 9 is provided on the air conditioner base 1. The locking protrusion 8 and the locking groove 9 engage with each other. The engagement of the locking protrusion 8 and the locking groove 9 also has a certain fixing effect, further strengthening the connection strength between the L-shaped fixing plate 3 and the air conditioner base 1. As for how the locking protrusion 8 is formed, it can be a protrusion that extends from or is additionally provided on the L-shaped fixing plate 3; it can also be a protrusion structure formed by stamping a part of the upper surface of the horizontal plate 32 toward the lower surface of the horizontal plate 32. The locking protrusion 8 is L-shaped, that is, it has a vertical part and a horizontal part connected to it. The vertical part is connected to the horizontal plate 32, and the horizontal part is completely locked into the locking groove 9.

[0062] like Figures 2 to 5 As shown, to facilitate the disassembly of the plate heat exchanger 2 and the air conditioner base 1, screws 15 are used for connection. Specifically, a first through hole 10 is provided on the vertical plate 31, and a stud 11 is correspondingly provided on the plate heat exchanger 2. The stud 11 passes through the first through hole 10. The rear side of the vertical plate 31 contacts the plate heat exchanger 2. A nut 12 is also included, which is threadedly connected to the stud 11. The nut 12 presses against the front side of the vertical plate 31. The lower surface of the horizontal plate 32 contacts the air conditioner base 1. A second through hole 13 is provided on the horizontal plate 32, and a threaded hole 14 is correspondingly provided on the air conditioner base 1. Screws 15 are also included for fixing. The tail of the screw 15 passes through the second through hole 13 and is threadedly connected to the threaded hole 14. The head of the screw 15 presses against the upper surface of the horizontal plate 32. For the first through hole 10, it is preferable to provide two, arranged side by side at intervals along the height direction of the vertical plate 31. For the second through hole 13, it is preferable to provide three, which are triangularly distributed.

[0063] like Figure 9 As shown in the figure, the installation structure of the plate heat exchanger of this utility model is shown in the assembly diagram of a multi-split air conditioning unit. The plate heat exchanger 2 is connected to the copper pipe of the air conditioning refrigeration component, which can significantly improve the heat exchange performance of the refrigeration component. The L-shaped fixing plate 3 firmly fixes the plate heat exchanger 2 to the air conditioning base 1, effectively preventing the copper pipe from breaking due to the shaking of the plate heat exchanger 2.

Claims

1. An installation structure for a plate heat exchanger, comprising an air conditioner base (1), a plate heat exchanger (2), and an L-shaped fixing plate (3), wherein the L-shaped fixing plate (3) comprises a vertical plate (31) and a horizontal plate (32) perpendicularly connected to each other, the vertical plate (31) being fixedly connected to the plate heat exchanger (2), and the horizontal plate (32) being fixedly connected to the air conditioner base (1), the L-shaped fixing plate (3) having a front side located at the right-angle bend opening and a rear side opposite to the front side, characterized in that, Part of the rear surface of the L-shaped fixing plate (3) is recessed to the front side, and the corresponding position on the front side is raised to form a reinforcing rib (4). The reinforcing rib (4) includes a first rib (41) located on the vertical plate (31) and a second rib (42) located on the horizontal plate (32). The first rib (41) and the second rib (42) are connected at the right angle bend of the L-shaped fixing plate (3).

2. The mounting structure for a plate heat exchanger as described in claim 1, characterized in that, The number of reinforcing ribs (4) is two, and the two reinforcing ribs (4) are arranged side by side and spaced apart along the left and right directions of the vertical plate (31).

3. The mounting structure for a plate heat exchanger as described in claim 1, characterized in that, A smooth transition structure (5) is provided at the junction of the first rib (41) and the second rib (42) on the front side of the L-shaped fixing plate (3).

4. The mounting structure for a plate heat exchanger as described in claim 3, characterized in that, The front surface of the transition structure (5) is stamped and recessed to the rear side, so that the transition structure (5) is close to the rear side of the L-shaped fixing plate (3).

5. The mounting structure for a plate heat exchanger as described in claim 1, characterized in that, The left and right edges of the vertical plate (31) and the left and right edges of the horizontal plate (32) are all bent edges (6) that bend towards the front of the L-shaped fixed plate (3).

6. The mounting structure for a plate heat exchanger as described in claim 5, characterized in that, The bending angle of the bent edge (6) is 80° to 100°.

7. The mounting structure for a plate heat exchanger as described in claim 5, characterized in that, The bends (6) of the vertical plate (31) and the horizontal plate (32) have smooth transition cuts (7) at their junctions.

8. The mounting structure for a plate heat exchanger as described in claim 1, characterized in that, The bottom of the horizontal plate (32) is provided with a protrusion (8), and the air conditioner base (1) is provided with a corresponding slot (9). The protrusion (8) and the slot (9) are engaged and matched.

9. The mounting structure for a plate heat exchanger as described in claim 8, characterized in that, The protrusion (8) is a protrusion structure formed by pressing a local surface of the upper surface of the horizontal plate (32) onto the lower surface of the horizontal plate (32).

10. The mounting structure for a plate heat exchanger as described in claim 1, characterized in that, A first through hole (10) is provided on the vertical plate (31), and a stud (11) is provided on the plate heat exchanger (2). The stud (11) passes through the first through hole (10). The rear side of the vertical plate (31) contacts the plate heat exchanger (2). A nut (12) is also provided. The nut (12) is threadedly connected to the stud (11). The nut (12) presses against the front side of the vertical plate (31). The lower surface of the horizontal plate (32) contacts the air conditioner base (1). A second through hole (13) is provided on the horizontal plate (32). A threaded hole (14) is provided on the air conditioner base (1). A screw (15) for fixing is also provided. The tail of the screw (15) passes through the second through hole (13) and is threadedly connected to the threaded hole (14). The head of the screw (15) presses against the upper surface of the horizontal plate (32).

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